diff options
| author | Simon Tatham <anakin@pobox.com> | 2021-10-10 16:30:37 +0300 |
|---|---|---|
| committer | Simon Tatham <anakin@pobox.com> | 2021-10-10 16:37:10 +0300 |
| commit | 0377c689f24a704814ae180264c3cf075548032c (patch) | |
| tree | fc048d77d4face8fbbe7fed41ec213c73d5c5347 /terminal | |
| parent | e7dd2421cfaf6dd75b316c011e4b10843d2007a6 (diff) | |
Start a 'terminal' source subdirectory.
This contains terminal.c, bidi.c (formerly minibidi.c), and
terminal.h. I'm about to make a couple more bidi-related source files,
so it seems worth starting by making a place to put them that won't be
cluttering up the top level.
Diffstat (limited to 'terminal')
| -rw-r--r-- | terminal/bidi.c | 2025 | ||||
| -rw-r--r-- | terminal/terminal.c | 7699 | ||||
| -rw-r--r-- | terminal/terminal.h | 529 |
3 files changed, 10253 insertions, 0 deletions
diff --git a/terminal/bidi.c b/terminal/bidi.c new file mode 100644 index 00000000..05d15b3d --- /dev/null +++ b/terminal/bidi.c @@ -0,0 +1,2025 @@ +/************************************************************************ + * + * ------------ + * Description: + * ------------ + * This is an implementation of Unicode's Bidirectional Algorithm + * (known as UAX #9). + * + * http://www.unicode.org/reports/tr9/ + * + * Author: Ahmad Khalifa + * + * (www.arabeyes.org - under MIT license) + * + ************************************************************************/ + +/* + * TODO: + * ===== + * - Explicit marks need to be handled (they are not 100% now) + * - Ligatures + */ + +#include <stdlib.h> /* definition of wchar_t*/ + +#include "putty.h" +#include "misc.h" + +#define LMASK 0x3F /* Embedding Level mask */ +#define OMASK 0xC0 /* Override mask */ +#define OISL 0x80 /* Override is L */ +#define OISR 0x40 /* Override is R */ + +/* For standalone compilation in a testing mode. + * Still depends on the PuTTY headers for snewn and sfree, but can avoid + * _linking_ with any other PuTTY code. */ +#ifdef TEST_GETTYPE +#define safemalloc malloc +#define safefree free +#endif + +/* Shaping Helpers */ +#define STYPE(xh) ((((xh) >= SHAPE_FIRST) && ((xh) <= SHAPE_LAST)) ? \ +shapetypes[(xh)-SHAPE_FIRST].type : SU) /*))*/ +#define SISOLATED(xh) (shapetypes[(xh)-SHAPE_FIRST].form_b) +#define SFINAL(xh) ((xh)+1) +#define SINITIAL(xh) ((xh)+2) +#define SMEDIAL(ch) ((ch)+3) + +#define leastGreaterOdd(x) ( ((x)+1) | 1 ) +#define leastGreaterEven(x) ( ((x)+2) &~ 1 ) + +/* function declarations */ +static void flipThisRun( + bidi_char *from, unsigned char *level, int max, int count); +static int findIndexOfRun( + unsigned char *level, int start, int count, int tlevel); +static unsigned char getType(int ch); +static unsigned char setOverrideBits( + unsigned char level, unsigned char override); +static int getPreviousLevel(unsigned char *level, int from); +static void doMirror(unsigned int *ch); + +/* character types */ +enum { + L, + LRE, + LRO, + R, + AL, + RLE, + RLO, + PDF, + EN, + ES, + ET, + AN, + CS, + NSM, + BN, + B, + S, + WS, + ON +}; + +/* Shaping Types */ +enum { + SL, /* Left-Joining, doesn't exist in U+0600 - U+06FF */ + SR, /* Right-Joining, ie has Isolated, Final */ + SD, /* Dual-Joining, ie has Isolated, Final, Initial, Medial */ + SU, /* Non-Joining */ + SC /* Join-Causing, like U+0640 (TATWEEL) */ +}; + +typedef struct { + char type; + wchar_t form_b; +} shape_node; + +/* Kept near the actual table, for verification. */ +#define SHAPE_FIRST 0x621 +#define SHAPE_LAST (SHAPE_FIRST + lenof(shapetypes) - 1) + +static const shape_node shapetypes[] = { + /* index, Typ, Iso, Ligature Index*/ + /* 621 */ {SU, 0xFE80}, + /* 622 */ {SR, 0xFE81}, + /* 623 */ {SR, 0xFE83}, + /* 624 */ {SR, 0xFE85}, + /* 625 */ {SR, 0xFE87}, + /* 626 */ {SD, 0xFE89}, + /* 627 */ {SR, 0xFE8D}, + /* 628 */ {SD, 0xFE8F}, + /* 629 */ {SR, 0xFE93}, + /* 62A */ {SD, 0xFE95}, + /* 62B */ {SD, 0xFE99}, + /* 62C */ {SD, 0xFE9D}, + /* 62D */ {SD, 0xFEA1}, + /* 62E */ {SD, 0xFEA5}, + /* 62F */ {SR, 0xFEA9}, + /* 630 */ {SR, 0xFEAB}, + /* 631 */ {SR, 0xFEAD}, + /* 632 */ {SR, 0xFEAF}, + /* 633 */ {SD, 0xFEB1}, + /* 634 */ {SD, 0xFEB5}, + /* 635 */ {SD, 0xFEB9}, + /* 636 */ {SD, 0xFEBD}, + /* 637 */ {SD, 0xFEC1}, + /* 638 */ {SD, 0xFEC5}, + /* 639 */ {SD, 0xFEC9}, + /* 63A */ {SD, 0xFECD}, + /* 63B */ {SU, 0x0}, + /* 63C */ {SU, 0x0}, + /* 63D */ {SU, 0x0}, + /* 63E */ {SU, 0x0}, + /* 63F */ {SU, 0x0}, + /* 640 */ {SC, 0x0}, + /* 641 */ {SD, 0xFED1}, + /* 642 */ {SD, 0xFED5}, + /* 643 */ {SD, 0xFED9}, + /* 644 */ {SD, 0xFEDD}, + /* 645 */ {SD, 0xFEE1}, + /* 646 */ {SD, 0xFEE5}, + /* 647 */ {SD, 0xFEE9}, + /* 648 */ {SR, 0xFEED}, + /* 649 */ {SR, 0xFEEF}, /* SD */ + /* 64A */ {SD, 0xFEF1}, + /* 64B */ {SU, 0x0}, + /* 64C */ {SU, 0x0}, + /* 64D */ {SU, 0x0}, + /* 64E */ {SU, 0x0}, + /* 64F */ {SU, 0x0}, + /* 650 */ {SU, 0x0}, + /* 651 */ {SU, 0x0}, + /* 652 */ {SU, 0x0}, + /* 653 */ {SU, 0x0}, + /* 654 */ {SU, 0x0}, + /* 655 */ {SU, 0x0}, + /* 656 */ {SU, 0x0}, + /* 657 */ {SU, 0x0}, + /* 658 */ {SU, 0x0}, + /* 659 */ {SU, 0x0}, + /* 65A */ {SU, 0x0}, + /* 65B */ {SU, 0x0}, + /* 65C */ {SU, 0x0}, + /* 65D */ {SU, 0x0}, + /* 65E */ {SU, 0x0}, + /* 65F */ {SU, 0x0}, + /* 660 */ {SU, 0x0}, + /* 661 */ {SU, 0x0}, + /* 662 */ {SU, 0x0}, + /* 663 */ {SU, 0x0}, + /* 664 */ {SU, 0x0}, + /* 665 */ {SU, 0x0}, + /* 666 */ {SU, 0x0}, + /* 667 */ {SU, 0x0}, + /* 668 */ {SU, 0x0}, + /* 669 */ {SU, 0x0}, + /* 66A */ {SU, 0x0}, + /* 66B */ {SU, 0x0}, + /* 66C */ {SU, 0x0}, + /* 66D */ {SU, 0x0}, + /* 66E */ {SU, 0x0}, + /* 66F */ {SU, 0x0}, + /* 670 */ {SU, 0x0}, + /* 671 */ {SR, 0xFB50}, + /* 672 */ {SU, 0x0}, + /* 673 */ {SU, 0x0}, + /* 674 */ {SU, 0x0}, + /* 675 */ {SU, 0x0}, + /* 676 */ {SU, 0x0}, + /* 677 */ {SU, 0x0}, + /* 678 */ {SU, 0x0}, + /* 679 */ {SD, 0xFB66}, + /* 67A */ {SD, 0xFB5E}, + /* 67B */ {SD, 0xFB52}, + /* 67C */ {SU, 0x0}, + /* 67D */ {SU, 0x0}, + /* 67E */ {SD, 0xFB56}, + /* 67F */ {SD, 0xFB62}, + /* 680 */ {SD, 0xFB5A}, + /* 681 */ {SU, 0x0}, + /* 682 */ {SU, 0x0}, + /* 683 */ {SD, 0xFB76}, + /* 684 */ {SD, 0xFB72}, + /* 685 */ {SU, 0x0}, + /* 686 */ {SD, 0xFB7A}, + /* 687 */ {SD, 0xFB7E}, + /* 688 */ {SR, 0xFB88}, + /* 689 */ {SU, 0x0}, + /* 68A */ {SU, 0x0}, + /* 68B */ {SU, 0x0}, + /* 68C */ {SR, 0xFB84}, + /* 68D */ {SR, 0xFB82}, + /* 68E */ {SR, 0xFB86}, + /* 68F */ {SU, 0x0}, + /* 690 */ {SU, 0x0}, + /* 691 */ {SR, 0xFB8C}, + /* 692 */ {SU, 0x0}, + /* 693 */ {SU, 0x0}, + /* 694 */ {SU, 0x0}, + /* 695 */ {SU, 0x0}, + /* 696 */ {SU, 0x0}, + /* 697 */ {SU, 0x0}, + /* 698 */ {SR, 0xFB8A}, + /* 699 */ {SU, 0x0}, + /* 69A */ {SU, 0x0}, + /* 69B */ {SU, 0x0}, + /* 69C */ {SU, 0x0}, + /* 69D */ {SU, 0x0}, + /* 69E */ {SU, 0x0}, + /* 69F */ {SU, 0x0}, + /* 6A0 */ {SU, 0x0}, + /* 6A1 */ {SU, 0x0}, + /* 6A2 */ {SU, 0x0}, + /* 6A3 */ {SU, 0x0}, + /* 6A4 */ {SD, 0xFB6A}, + /* 6A5 */ {SU, 0x0}, + /* 6A6 */ {SD, 0xFB6E}, + /* 6A7 */ {SU, 0x0}, + /* 6A8 */ {SU, 0x0}, + /* 6A9 */ {SD, 0xFB8E}, + /* 6AA */ {SU, 0x0}, + /* 6AB */ {SU, 0x0}, + /* 6AC */ {SU, 0x0}, + /* 6AD */ {SD, 0xFBD3}, + /* 6AE */ {SU, 0x0}, + /* 6AF */ {SD, 0xFB92}, + /* 6B0 */ {SU, 0x0}, + /* 6B1 */ {SD, 0xFB9A}, + /* 6B2 */ {SU, 0x0}, + /* 6B3 */ {SD, 0xFB96}, + /* 6B4 */ {SU, 0x0}, + /* 6B5 */ {SU, 0x0}, + /* 6B6 */ {SU, 0x0}, + /* 6B7 */ {SU, 0x0}, + /* 6B8 */ {SU, 0x0}, + /* 6B9 */ {SU, 0x0}, + /* 6BA */ {SR, 0xFB9E}, + /* 6BB */ {SD, 0xFBA0}, + /* 6BC */ {SU, 0x0}, + /* 6BD */ {SU, 0x0}, + /* 6BE */ {SD, 0xFBAA}, + /* 6BF */ {SU, 0x0}, + /* 6C0 */ {SR, 0xFBA4}, + /* 6C1 */ {SD, 0xFBA6}, + /* 6C2 */ {SU, 0x0}, + /* 6C3 */ {SU, 0x0}, + /* 6C4 */ {SU, 0x0}, + /* 6C5 */ {SR, 0xFBE0}, + /* 6C6 */ {SR, 0xFBD9}, + /* 6C7 */ {SR, 0xFBD7}, + /* 6C8 */ {SR, 0xFBDB}, + /* 6C9 */ {SR, 0xFBE2}, + /* 6CA */ {SU, 0x0}, + /* 6CB */ {SR, 0xFBDE}, + /* 6CC */ {SD, 0xFBFC}, + /* 6CD */ {SU, 0x0}, + /* 6CE */ {SU, 0x0}, + /* 6CF */ {SU, 0x0}, + /* 6D0 */ {SU, 0x0}, + /* 6D1 */ {SU, 0x0}, + /* 6D2 */ {SR, 0xFBAE}, +}; + +/* + * Flips the text buffer, according to max level, and + * all higher levels + * + * Input: + * from: text buffer, on which to apply flipping + * level: resolved levels buffer + * max: the maximum level found in this line (should be unsigned char) + * count: line size in bidi_char + */ +static void flipThisRun( + bidi_char *from, unsigned char *level, int max, int count) +{ + int i, j, k, tlevel; + bidi_char temp; + + j = i = 0; + while (i<count && j<count) { + + /* find the start of the run of level=max */ + tlevel = max; + i = j = findIndexOfRun(level, i, count, max); + /* find the end of the run */ + while (i<count && tlevel <= level[i]) { + i++; + } + for (k = i - 1; k > j; k--, j++) { + temp = from[k]; + from[k] = from[j]; + from[j] = temp; + } + } +} + +/* + * Finds the index of a run with level equals tlevel + */ +static int findIndexOfRun( + unsigned char *level , int start, int count, int tlevel) +{ + int i; + for (i=start; i<count; i++) { + if (tlevel == level[i]) { + return i; + } + } + return count; +} + +/* + * Returns the bidi character type of ch. + * + * The data table in this function is constructed from the Unicode + * Character Database, downloadable from unicode.org at the URL + * + * http://www.unicode.org/Public/UNIDATA/UnicodeData.txt + * + * by the following fragment of Perl: + +perl -ne 'split ";"; $num = hex $_[0]; $type = $_[4];' \ + -e '$fl = ($_[1] =~ /First/ ? 1 : $_[1] =~ /Last/ ? 2 : 0);' \ + -e 'if ($type eq $runtype and ($runend == $num-1 or ' \ + -e ' ($fl==2 and $pfl==1))) {$runend = $num;} else { &reset; }' \ + -e '$pfl=$fl; END { &reset }; sub reset {' \ + -e 'printf" {0x%04x, 0x%04x, %s},\n",$runstart,$runend,$runtype' \ + -e ' if defined $runstart and $runtype ne "ON";' \ + -e '$runstart=$runend=$num; $runtype=$type;}' \ + UnicodeData.txt + + */ +static unsigned char getType(int ch) +{ + static const struct { + int first, last, type; + } lookup[] = { + {0x0000, 0x0008, BN}, + {0x0009, 0x0009, S}, + {0x000a, 0x000a, B}, + {0x000b, 0x000b, S}, + {0x000c, 0x000c, WS}, + {0x000d, 0x000d, B}, + {0x000e, 0x001b, BN}, + {0x001c, 0x001e, B}, + {0x001f, 0x001f, S}, + {0x0020, 0x0020, WS}, + {0x0023, 0x0025, ET}, + {0x002b, 0x002b, ES}, + {0x002c, 0x002c, CS}, + {0x002d, 0x002d, ES}, + {0x002e, 0x002f, CS}, + {0x0030, 0x0039, EN}, + {0x003a, 0x003a, CS}, + {0x0041, 0x005a, L}, + {0x0061, 0x007a, L}, + {0x007f, 0x0084, BN}, + {0x0085, 0x0085, B}, + {0x0086, 0x009f, BN}, + {0x00a0, 0x00a0, CS}, + {0x00a2, 0x00a5, ET}, + {0x00aa, 0x00aa, L}, + {0x00ad, 0x00ad, BN}, + {0x00b0, 0x00b1, ET}, + {0x00b2, 0x00b3, EN}, + {0x00b5, 0x00b5, L}, + {0x00b9, 0x00b9, EN}, + {0x00ba, 0x00ba, L}, + {0x00c0, 0x00d6, L}, + {0x00d8, 0x00f6, L}, + {0x00f8, 0x0236, L}, + {0x0250, 0x02b8, L}, + {0x02bb, 0x02c1, L}, + {0x02d0, 0x02d1, L}, + {0x02e0, 0x02e4, L}, + {0x02ee, 0x02ee, L}, + {0x0300, 0x0357, NSM}, + {0x035d, 0x036f, NSM}, + {0x037a, 0x037a, L}, + {0x0386, 0x0386, L}, + {0x0388, 0x038a, L}, + {0x038c, 0x038c, L}, + {0x038e, 0x03a1, L}, + {0x03a3, 0x03ce, L}, + {0x03d0, 0x03f5, L}, + {0x03f7, 0x03fb, L}, + {0x0400, 0x0482, L}, + {0x0483, 0x0486, NSM}, + {0x0488, 0x0489, NSM}, + {0x048a, 0x04ce, L}, + {0x04d0, 0x04f5, L}, + {0x04f8, 0x04f9, L}, + {0x0500, 0x050f, L}, + {0x0531, 0x0556, L}, + {0x0559, 0x055f, L}, + {0x0561, 0x0587, L}, + {0x0589, 0x0589, L}, + {0x0591, 0x05a1, NSM}, + {0x05a3, 0x05b9, NSM}, + {0x05bb, 0x05bd, NSM}, + {0x05be, 0x05be, R}, + {0x05bf, 0x05bf, NSM}, + {0x05c0, 0x05c0, R}, + {0x05c1, 0x05c2, NSM}, + {0x05c3, 0x05c3, R}, + {0x05c4, 0x05c4, NSM}, + {0x05d0, 0x05ea, R}, + {0x05f0, 0x05f4, R}, + {0x0600, 0x0603, AL}, + {0x060c, 0x060c, CS}, + {0x060d, 0x060d, AL}, + {0x0610, 0x0615, NSM}, + {0x061b, 0x061b, AL}, + {0x061f, 0x061f, AL}, + {0x0621, 0x063a, AL}, + {0x0640, 0x064a, AL}, + {0x064b, 0x0658, NSM}, + {0x0660, 0x0669, AN}, + {0x066a, 0x066a, ET}, + {0x066b, 0x066c, AN}, + {0x066d, 0x066f, AL}, + {0x0670, 0x0670, NSM}, + {0x0671, 0x06d5, AL}, + {0x06d6, 0x06dc, NSM}, + {0x06dd, 0x06dd, AL}, + {0x06de, 0x06e4, NSM}, + {0x06e5, 0x06e6, AL}, + {0x06e7, 0x06e8, NSM}, + {0x06ea, 0x06ed, NSM}, + {0x06ee, 0x06ef, AL}, + {0x06f0, 0x06f9, EN}, + {0x06fa, 0x070d, AL}, + {0x070f, 0x070f, BN}, + {0x0710, 0x0710, AL}, + {0x0711, 0x0711, NSM}, + {0x0712, 0x072f, AL}, + {0x0730, 0x074a, NSM}, + {0x074d, 0x074f, AL}, + {0x0780, 0x07a5, AL}, + {0x07a6, 0x07b0, NSM}, + {0x07b1, 0x07b1, AL}, + {0x0901, 0x0902, NSM}, + {0x0903, 0x0939, L}, + {0x093c, 0x093c, NSM}, + {0x093d, 0x0940, L}, + {0x0941, 0x0948, NSM}, + {0x0949, 0x094c, L}, + {0x094d, 0x094d, NSM}, + {0x0950, 0x0950, L}, + {0x0951, 0x0954, NSM}, + {0x0958, 0x0961, L}, + {0x0962, 0x0963, NSM}, + {0x0964, 0x0970, L}, + {0x0981, 0x0981, NSM}, + {0x0982, 0x0983, L}, + {0x0985, 0x098c, L}, + {0x098f, 0x0990, L}, + {0x0993, 0x09a8, L}, + {0x09aa, 0x09b0, L}, + {0x09b2, 0x09b2, L}, + {0x09b6, 0x09b9, L}, + {0x09bc, 0x09bc, NSM}, + {0x09bd, 0x09c0, L}, + {0x09c1, 0x09c4, NSM}, + {0x09c7, 0x09c8, L}, + {0x09cb, 0x09cc, L}, + {0x09cd, 0x09cd, NSM}, + {0x09d7, 0x09d7, L}, + {0x09dc, 0x09dd, L}, + {0x09df, 0x09e1, L}, + {0x09e2, 0x09e3, NSM}, + {0x09e6, 0x09f1, L}, + {0x09f2, 0x09f3, ET}, + {0x09f4, 0x09fa, L}, + {0x0a01, 0x0a02, NSM}, + {0x0a03, 0x0a03, L}, + {0x0a05, 0x0a0a, L}, + {0x0a0f, 0x0a10, L}, + {0x0a13, 0x0a28, L}, + {0x0a2a, 0x0a30, L}, + {0x0a32, 0x0a33, L}, + {0x0a35, 0x0a36, L}, + {0x0a38, 0x0a39, L}, + {0x0a3c, 0x0a3c, NSM}, + {0x0a3e, 0x0a40, L}, + {0x0a41, 0x0a42, NSM}, + {0x0a47, 0x0a48, NSM}, + {0x0a4b, 0x0a4d, NSM}, + {0x0a59, 0x0a5c, L}, + {0x0a5e, 0x0a5e, L}, + {0x0a66, 0x0a6f, L}, + {0x0a70, 0x0a71, NSM}, + {0x0a72, 0x0a74, L}, + {0x0a81, 0x0a82, NSM}, + {0x0a83, 0x0a83, L}, + {0x0a85, 0x0a8d, L}, + {0x0a8f, 0x0a91, L}, + {0x0a93, 0x0aa8, L}, + {0x0aaa, 0x0ab0, L}, + {0x0ab2, 0x0ab3, L}, + {0x0ab5, 0x0ab9, L}, + {0x0abc, 0x0abc, NSM}, + {0x0abd, 0x0ac0, L}, + {0x0ac1, 0x0ac5, NSM}, + {0x0ac7, 0x0ac8, NSM}, + {0x0ac9, 0x0ac9, L}, + {0x0acb, 0x0acc, L}, + {0x0acd, 0x0acd, NSM}, + {0x0ad0, 0x0ad0, L}, + {0x0ae0, 0x0ae1, L}, + {0x0ae2, 0x0ae3, NSM}, + {0x0ae6, 0x0aef, L}, + {0x0af1, 0x0af1, ET}, + {0x0b01, 0x0b01, NSM}, + {0x0b02, 0x0b03, L}, + {0x0b05, 0x0b0c, L}, + {0x0b0f, 0x0b10, L}, + {0x0b13, 0x0b28, L}, + {0x0b2a, 0x0b30, L}, + {0x0b32, 0x0b33, L}, + {0x0b35, 0x0b39, L}, + {0x0b3c, 0x0b3c, NSM}, + {0x0b3d, 0x0b3e, L}, + {0x0b3f, 0x0b3f, NSM}, + {0x0b40, 0x0b40, L}, + {0x0b41, 0x0b43, NSM}, + {0x0b47, 0x0b48, L}, + {0x0b4b, 0x0b4c, L}, + {0x0b4d, 0x0b4d, NSM}, + {0x0b56, 0x0b56, NSM}, + {0x0b57, 0x0b57, L}, + {0x0b5c, 0x0b5d, L}, + {0x0b5f, 0x0b61, L}, + {0x0b66, 0x0b71, L}, + {0x0b82, 0x0b82, NSM}, + {0x0b83, 0x0b83, L}, + {0x0b85, 0x0b8a, L}, + {0x0b8e, 0x0b90, L}, + {0x0b92, 0x0b95, L}, + {0x0b99, 0x0b9a, L}, + {0x0b9c, 0x0b9c, L}, + {0x0b9e, 0x0b9f, L}, + {0x0ba3, 0x0ba4, L}, + {0x0ba8, 0x0baa, L}, + {0x0bae, 0x0bb5, L}, + {0x0bb7, 0x0bb9, L}, + {0x0bbe, 0x0bbf, L}, + {0x0bc0, 0x0bc0, NSM}, + {0x0bc1, 0x0bc2, L}, + {0x0bc6, 0x0bc8, L}, + {0x0bca, 0x0bcc, L}, + {0x0bcd, 0x0bcd, NSM}, + {0x0bd7, 0x0bd7, L}, + {0x0be7, 0x0bf2, L}, + {0x0bf9, 0x0bf9, ET}, + {0x0c01, 0x0c03, L}, + {0x0c05, 0x0c0c, L}, + {0x0c0e, 0x0c10, L}, + {0x0c12, 0x0c28, L}, + {0x0c2a, 0x0c33, L}, + {0x0c35, 0x0c39, L}, + {0x0c3e, 0x0c40, NSM}, + {0x0c41, 0x0c44, L}, + {0x0c46, 0x0c48, NSM}, + {0x0c4a, 0x0c4d, NSM}, + {0x0c55, 0x0c56, NSM}, + {0x0c60, 0x0c61, L}, + {0x0c66, 0x0c6f, L}, + {0x0c82, 0x0c83, L}, + {0x0c85, 0x0c8c, L}, + {0x0c8e, 0x0c90, L}, + {0x0c92, 0x0ca8, L}, + {0x0caa, 0x0cb3, L}, + {0x0cb5, 0x0cb9, L}, + {0x0cbc, 0x0cbc, NSM}, + {0x0cbd, 0x0cc4, L}, + {0x0cc6, 0x0cc8, L}, + {0x0cca, 0x0ccb, L}, + {0x0ccc, 0x0ccd, NSM}, + {0x0cd5, 0x0cd6, L}, + {0x0cde, 0x0cde, L}, + {0x0ce0, 0x0ce1, L}, + {0x0ce6, 0x0cef, L}, + {0x0d02, 0x0d03, L}, + {0x0d05, 0x0d0c, L}, + {0x0d0e, 0x0d10, L}, + {0x0d12, 0x0d28, L}, + {0x0d2a, 0x0d39, L}, + {0x0d3e, 0x0d40, L}, + {0x0d41, 0x0d43, NSM}, + {0x0d46, 0x0d48, L}, + {0x0d4a, 0x0d4c, L}, + {0x0d4d, 0x0d4d, NSM}, + {0x0d57, 0x0d57, L}, + {0x0d60, 0x0d61, L}, + {0x0d66, 0x0d6f, L}, + {0x0d82, 0x0d83, L}, + {0x0d85, 0x0d96, L}, + {0x0d9a, 0x0db1, L}, + {0x0db3, 0x0dbb, L}, + {0x0dbd, 0x0dbd, L}, + {0x0dc0, 0x0dc6, L}, + {0x0dca, 0x0dca, NSM}, + {0x0dcf, 0x0dd1, L}, + {0x0dd2, 0x0dd4, NSM}, + {0x0dd6, 0x0dd6, NSM}, + {0x0dd8, 0x0ddf, L}, + {0x0df2, 0x0df4, L}, + {0x0e01, 0x0e30, L}, + {0x0e31, 0x0e31, NSM}, + {0x0e32, 0x0e33, L}, + {0x0e34, 0x0e3a, NSM}, + {0x0e3f, 0x0e3f, ET}, + {0x0e40, 0x0e46, L}, + {0x0e47, 0x0e4e, NSM}, + {0x0e4f, 0x0e5b, L}, + {0x0e81, 0x0e82, L}, + {0x0e84, 0x0e84, L}, + {0x0e87, 0x0e88, L}, + {0x0e8a, 0x0e8a, L}, + {0x0e8d, 0x0e8d, L}, + {0x0e94, 0x0e97, L}, + {0x0e99, 0x0e9f, L}, + {0x0ea1, 0x0ea3, L}, + {0x0ea5, 0x0ea5, L}, + {0x0ea7, 0x0ea7, L}, + {0x0eaa, 0x0eab, L}, + {0x0ead, 0x0eb0, L}, + {0x0eb1, 0x0eb1, NSM}, + {0x0eb2, 0x0eb3, L}, + {0x0eb4, 0x0eb9, NSM}, + {0x0ebb, 0x0ebc, NSM}, + {0x0ebd, 0x0ebd, L}, + {0x0ec0, 0x0ec4, L}, + {0x0ec6, 0x0ec6, L}, + {0x0ec8, 0x0ecd, NSM}, + {0x0ed0, 0x0ed9, L}, + {0x0edc, 0x0edd, L}, + {0x0f00, 0x0f17, L}, + {0x0f18, 0x0f19, NSM}, + {0x0f1a, 0x0f34, L}, + {0x0f35, 0x0f35, NSM}, + {0x0f36, 0x0f36, L}, + {0x0f37, 0x0f37, NSM}, + {0x0f38, 0x0f38, L}, + {0x0f39, 0x0f39, NSM}, + {0x0f3e, 0x0f47, L}, + {0x0f49, 0x0f6a, L}, + {0x0f71, 0x0f7e, NSM}, + {0x0f7f, 0x0f7f, L}, + {0x0f80, 0x0f84, NSM}, + {0x0f85, 0x0f85, L}, + {0x0f86, 0x0f87, NSM}, + {0x0f88, 0x0f8b, L}, + {0x0f90, 0x0f97, NSM}, + {0x0f99, 0x0fbc, NSM}, + {0x0fbe, 0x0fc5, L}, + {0x0fc6, 0x0fc6, NSM}, + {0x0fc7, 0x0fcc, L}, + {0x0fcf, 0x0fcf, L}, + {0x1000, 0x1021, L}, + {0x1023, 0x1027, L}, + {0x1029, 0x102a, L}, + {0x102c, 0x102c, L}, + {0x102d, 0x1030, NSM}, + {0x1031, 0x1031, L}, + {0x1032, 0x1032, NSM}, + {0x1036, 0x1037, NSM}, + {0x1038, 0x1038, L}, + {0x1039, 0x1039, NSM}, + {0x1040, 0x1057, L}, + {0x1058, 0x1059, NSM}, + {0x10a0, 0x10c5, L}, + {0x10d0, 0x10f8, L}, + {0x10fb, 0x10fb, L}, + {0x1100, 0x1159, L}, + {0x115f, 0x11a2, L}, + {0x11a8, 0x11f9, L}, + {0x1200, 0x1206, L}, + {0x1208, 0x1246, L}, + {0x1248, 0x1248, L}, + {0x124a, 0x124d, L}, + {0x1250, 0x1256, L}, + {0x1258, 0x1258, L}, + {0x125a, 0x125d, L}, + {0x1260, 0x1286, L}, + {0x1288, 0x1288, L}, + {0x128a, 0x128d, L}, + {0x1290, 0x12ae, L}, + {0x12b0, 0x12b0, L}, + {0x12b2, 0x12b5, L}, + {0x12b8, 0x12be, L}, + {0x12c0, 0x12c0, L}, + {0x12c2, 0x12c5, L}, + {0x12c8, 0x12ce, L}, + {0x12d0, 0x12d6, L}, + {0x12d8, 0x12ee, L}, + {0x12f0, 0x130e, L}, + {0x1310, 0x1310, L}, + {0x1312, 0x1315, L}, + {0x1318, 0x131e, L}, + {0x1320, 0x1346, L}, + {0x1348, 0x135a, L}, + {0x1361, 0x137c, L}, + {0x13a0, 0x13f4, L}, + {0x1401, 0x1676, L}, + {0x1680, 0x1680, WS}, + {0x1681, 0x169a, L}, + {0x16a0, 0x16f0, L}, + {0x1700, 0x170c, L}, + {0x170e, 0x1711, L}, + {0x1712, 0x1714, NSM}, + {0x1720, 0x1731, L}, + {0x1732, 0x1734, NSM}, + {0x1735, 0x1736, L}, + {0x1740, 0x1751, L}, + {0x1752, 0x1753, NSM}, + {0x1760, 0x176c, L}, + {0x176e, 0x1770, L}, + {0x1772, 0x1773, NSM}, + {0x1780, 0x17b6, L}, + {0x17b7, 0x17bd, NSM}, + {0x17be, 0x17c5, L}, + {0x17c6, 0x17c6, NSM}, + {0x17c7, 0x17c8, L}, + {0x17c9, 0x17d3, NSM}, + {0x17d4, 0x17da, L}, + {0x17db, 0x17db, ET}, + {0x17dc, 0x17dc, L}, + {0x17dd, 0x17dd, NSM}, + {0x17e0, 0x17e9, L}, + {0x180b, 0x180d, NSM}, + {0x180e, 0x180e, WS}, + {0x1810, 0x1819, L}, + {0x1820, 0x1877, L}, + {0x1880, 0x18a8, L}, + {0x18a9, 0x18a9, NSM}, + {0x1900, 0x191c, L}, + {0x1920, 0x1922, NSM}, + {0x1923, 0x1926, L}, + {0x1927, 0x192b, NSM}, + {0x1930, 0x1931, L}, + {0x1932, 0x1932, NSM}, + {0x1933, 0x1938, L}, + {0x1939, 0x193b, NSM}, + {0x1946, 0x196d, L}, + {0x1970, 0x1974, L}, + {0x1d00, 0x1d6b, L}, + {0x1e00, 0x1e9b, L}, + {0x1ea0, 0x1ef9, L}, + {0x1f00, 0x1f15, L}, + {0x1f18, 0x1f1d, L}, + {0x1f20, 0x1f45, L}, + {0x1f48, 0x1f4d, L}, + {0x1f50, 0x1f57, L}, + {0x1f59, 0x1f59, L}, + {0x1f5b, 0x1f5b, L}, + {0x1f5d, 0x1f5d, L}, + {0x1f5f, 0x1f7d, L}, + {0x1f80, 0x1fb4, L}, + {0x1fb6, 0x1fbc, L}, + {0x1fbe, 0x1fbe, L}, + {0x1fc2, 0x1fc4, L}, + {0x1fc6, 0x1fcc, L}, + {0x1fd0, 0x1fd3, L}, + {0x1fd6, 0x1fdb, L}, + {0x1fe0, 0x1fec, L}, + {0x1ff2, 0x1ff4, L}, + {0x1ff6, 0x1ffc, L}, + {0x2000, 0x200a, WS}, + {0x200b, 0x200d, BN}, + {0x200e, 0x200e, L}, + {0x200f, 0x200f, R}, + {0x2028, 0x2028, WS}, + {0x2029, 0x2029, B}, + {0x202a, 0x202a, LRE}, + {0x202b, 0x202b, RLE}, + {0x202c, 0x202c, PDF}, + {0x202d, 0x202d, LRO}, + {0x202e, 0x202e, RLO}, + {0x202f, 0x202f, WS}, + {0x2030, 0x2034, ET}, + {0x2044, 0x2044, CS}, + {0x205f, 0x205f, WS}, + {0x2060, 0x2063, BN}, + {0x206a, 0x206f, BN}, + {0x2070, 0x2070, EN}, + {0x2071, 0x2071, L}, + {0x2074, 0x2079, EN}, + {0x207a, 0x207b, ET}, + {0x207f, 0x207f, L}, + {0x2080, 0x2089, EN}, + {0x208a, 0x208b, ET}, + {0x20a0, 0x20b1, ET}, + {0x20d0, 0x20ea, NSM}, + {0x2102, 0x2102, L}, + {0x2107, 0x2107, L}, + {0x210a, 0x2113, L}, + {0x2115, 0x2115, L}, + {0x2119, 0x211d, L}, + {0x2124, 0x2124, L}, + {0x2126, 0x2126, L}, + {0x2128, 0x2128, L}, + {0x212a, 0x212d, L}, + {0x212e, 0x212e, ET}, + {0x212f, 0x2131, L}, + {0x2133, 0x2139, L}, + {0x213d, 0x213f, L}, + {0x2145, 0x2149, L}, + {0x2160, 0x2183, L}, + {0x2212, 0x2213, ET}, + {0x2336, 0x237a, L}, + {0x2395, 0x2395, L}, + {0x2488, 0x249b, EN}, + {0x249c, 0x24e9, L}, + {0x2800, 0x28ff, L}, + {0x3000, 0x3000, WS}, + {0x3005, 0x3007, L}, + {0x3021, 0x3029, L}, + {0x302a, 0x302f, NSM}, + {0x3031, 0x3035, L}, + {0x3038, 0x303c, L}, + {0x3041, 0x3096, L}, + {0x3099, 0x309a, NSM}, + {0x309d, 0x309f, L}, + {0x30a1, 0x30fa, L}, + {0x30fc, 0x30ff, L}, + {0x3105, 0x312c, L}, + {0x3131, 0x318e, L}, + {0x3190, 0x31b7, L}, + {0x31f0, 0x321c, L}, + {0x3220, 0x3243, L}, + {0x3260, 0x327b, L}, + {0x327f, 0x32b0, L}, + {0x32c0, 0x32cb, L}, + {0x32d0, 0x32fe, L}, + {0x3300, 0x3376, L}, + {0x337b, 0x33dd, L}, + {0x33e0, 0x33fe, L}, + {0x3400, 0x4db5, L}, + {0x4e00, 0x9fa5, L}, + {0xa000, 0xa48c, L}, + {0xac00, 0xd7a3, L}, + {0xd800, 0xdff7, L}, + {0xe000, 0xfa2d, L}, + {0xfa30, 0xfa6a, L}, + {0xfb00, 0xfb06, L}, + {0xfb13, 0xfb17, L}, + {0xfb1d, 0xfb1d, R}, + {0xfb1e, 0xfb1e, NSM}, + {0xfb1f, 0xfb28, R}, + {0xfb29, 0xfb29, ET}, + {0xfb2a, 0xfb36, R}, + {0xfb38, 0xfb3c, R}, + {0xfb3e, 0xfb3e, R}, + {0xfb40, 0xfb41, R}, + {0xfb43, 0xfb44, R}, + {0xfb46, 0xfb4f, R}, + {0xfb50, 0xfbb1, AL}, + {0xfbd3, 0xfd3d, AL}, + {0xfd50, 0xfd8f, AL}, + {0xfd92, 0xfdc7, AL}, + {0xfdf0, 0xfdfc, AL}, + {0xfe00, 0xfe0f, NSM}, + {0xfe20, 0xfe23, NSM}, + {0xfe50, 0xfe50, CS}, + {0xfe52, 0xfe52, CS}, + {0xfe55, 0xfe55, CS}, + {0xfe5f, 0xfe5f, ET}, + {0xfe62, 0xfe63, ET}, + {0xfe69, 0xfe6a, ET}, + {0xfe70, 0xfe74, AL}, + {0xfe76, 0xfefc, AL}, + {0xfeff, 0xfeff, BN}, + {0xff03, 0xff05, ET}, + {0xff0b, 0xff0b, ET}, + {0xff0c, 0xff0c, CS}, + {0xff0d, 0xff0d, ET}, + {0xff0e, 0xff0e, CS}, + {0xff0f, 0xff0f, ES}, + {0xff10, 0xff19, EN}, + {0xff1a, 0xff1a, CS}, + {0xff21, 0xff3a, L}, + {0xff41, 0xff5a, L}, + {0xff66, 0xffbe, L}, + {0xffc2, 0xffc7, L}, + {0xffca, 0xffcf, L}, + {0xffd2, 0xffd7, L}, + {0xffda, 0xffdc, L}, + {0xffe0, 0xffe1, ET}, + {0xffe5, 0xffe6, ET}, + {0x10000, 0x1000b, L}, + {0x1000d, 0x10026, L}, + {0x10028, 0x1003a, L}, + {0x1003c, 0x1003d, L}, + {0x1003f, 0x1004d, L}, + {0x10050, 0x1005d, L}, + {0x10080, 0x100fa, L}, + {0x10100, 0x10100, L}, + {0x10102, 0x10102, L}, + {0x10107, 0x10133, L}, + {0x10137, 0x1013f, L}, + {0x10300, 0x1031e, L}, + {0x10320, 0x10323, L}, + {0x10330, 0x1034a, L}, + {0x10380, 0x1039d, L}, + {0x1039f, 0x1039f, L}, + {0x10400, 0x1049d, L}, + {0x104a0, 0x104a9, L}, + {0x10800, 0x10805, R}, + {0x10808, 0x10808, R}, + {0x1080a, 0x10835, R}, + {0x10837, 0x10838, R}, + {0x1083c, 0x1083c, R}, + {0x1083f, 0x1083f, R}, + {0x1d000, 0x1d0f5, L}, + {0x1d100, 0x1d126, L}, + {0x1d12a, 0x1d166, L}, + {0x1d167, 0x1d169, NSM}, + {0x1d16a, 0x1d172, L}, + {0x1d173, 0x1d17a, BN}, + {0x1d17b, 0x1d182, NSM}, + {0x1d183, 0x1d184, L}, + {0x1d185, 0x1d18b, NSM}, + {0x1d18c, 0x1d1a9, L}, + {0x1d1aa, 0x1d1ad, NSM}, + {0x1d1ae, 0x1d1dd, L}, + {0x1d400, 0x1d454, L}, + {0x1d456, 0x1d49c, L}, + {0x1d49e, 0x1d49f, L}, + {0x1d4a2, 0x1d4a2, L}, + {0x1d4a5, 0x1d4a6, L}, + {0x1d4a9, 0x1d4ac, L}, + {0x1d4ae, 0x1d4b9, L}, + {0x1d4bb, 0x1d4bb, L}, + {0x1d4bd, 0x1d4c3, L}, + {0x1d4c5, 0x1d505, L}, + {0x1d507, 0x1d50a, L}, + {0x1d50d, 0x1d514, L}, + {0x1d516, 0x1d51c, L}, + {0x1d51e, 0x1d539, L}, + {0x1d53b, 0x1d53e, L}, + {0x1d540, 0x1d544, L}, + {0x1d546, 0x1d546, L}, + {0x1d54a, 0x1d550, L}, + {0x1d552, 0x1d6a3, L}, + {0x1d6a8, 0x1d7c9, L}, + {0x1d7ce, 0x1d7ff, EN}, + {0x20000, 0x2a6d6, L}, + {0x2f800, 0x2fa1d, L}, + {0xe0001, 0xe0001, BN}, + {0xe0020, 0xe007f, BN}, + {0xe0100, 0xe01ef, NSM}, + {0xf0000, 0xffffd, L}, + {0x100000, 0x10fffd, L} + }; + + int i, j, k; + + i = -1; + j = lenof(lookup); + + while (j - i > 1) { + k = (i + j) / 2; + if (ch < lookup[k].first) + j = k; + else if (ch > lookup[k].last) + i = k; + else + return lookup[k].type; + } + + /* + * If we reach here, the character was not in any of the + * intervals listed in the lookup table. This means we return + * ON (`Other Neutrals'). This is the appropriate code for any + * character genuinely not listed in the Unicode table, and + * also the table above has deliberately left out any + * characters _explicitly_ listed as ON (to save space!). + */ + return ON; +} + +/* + * Function exported to front ends to allow them to identify + * bidi-active characters (in case, for example, the platform's + * text display function can't conveniently be prevented from doing + * its own bidi and so special treatment is required for characters + * that would cause the bidi algorithm to activate). + * + * This function is passed a single Unicode code point, and returns + * nonzero if the presence of this code point can possibly cause + * the bidi algorithm to do any reordering. Thus, any string + * composed entirely of characters for which is_rtl() returns zero + * should be safe to pass to a bidi-active platform display + * function without fear. + * + * (is_rtl() must therefore also return true for any character + * which would be affected by Arabic shaping, but this isn't + * important because all such characters are right-to-left so it + * would have flagged them anyway.) + */ +bool is_rtl(int c) +{ + /* + * After careful reading of the Unicode bidi algorithm (URL as + * given at the top of this file) I believe that the only + * character classes which can possibly cause trouble are R, + * AL, RLE and RLO. I think that any string containing no + * character in any of those classes will be displayed + * uniformly left-to-right by the Unicode bidi algorithm. + */ + const int mask = (1<<R) | (1<<AL) | (1<<RLE) | (1<<RLO); + + return mask & (1 << (getType(c))); +} + +/* + * The most significant 2 bits of each level are used to store + * Override status of each character + * This function sets the override bits of level according + * to the value in override, and reurns the new byte. + */ +static unsigned char setOverrideBits( + unsigned char level, unsigned char override) +{ + if (override == ON) + return level; + else if (override == R) + return level | OISR; + else if (override == L) + return level | OISL; + return level; +} + +/* + * Find the most recent run of the same value in `level', and + * return the value _before_ it. Used to process U+202C POP + * DIRECTIONAL FORMATTING. + */ +static int getPreviousLevel(unsigned char *level, int from) +{ + if (from > 0) { + unsigned char current = level[--from]; + + while (from >= 0 && level[from] == current) + from--; + + if (from >= 0) + return level[from]; + + return -1; + } else + return -1; +} + +/* The Main shaping function, and the only one to be used + * by the outside world. + * + * line: buffer to apply shaping to. this must be passed by doBidi() first + * to: output buffer for the shaped data + * count: number of characters in line + */ +int do_shape(bidi_char *line, bidi_char *to, int count) +{ + int i, tempShape; + bool ligFlag = false; + + for (i=0; i<count; i++) { + to[i] = line[i]; + tempShape = STYPE(line[i].wc); + switch (tempShape) { + case SC: + break; + + case SU: + break; + + case SR: + tempShape = (i+1 < count ? STYPE(line[i+1].wc) : SU); + if ((tempShape == SL) || (tempShape == SD) || (tempShape == SC)) + to[i].wc = SFINAL((SISOLATED(line[i].wc))); + else + to[i].wc = SISOLATED(line[i].wc); + break; + + + case SD: + /* Make Ligatures */ + tempShape = (i+1 < count ? STYPE(line[i+1].wc) : SU); + if (line[i].wc == 0x644) { + if (i > 0) switch (line[i-1].wc) { + case 0x622: + ligFlag = true; + if ((tempShape == SL) || (tempShape == SD) || (tempShape == SC)) + to[i].wc = 0xFEF6; + else + to[i].wc = 0xFEF5; + break; + case 0x623: + ligFlag = true; + if ((tempShape == SL) || (tempShape == SD) || (tempShape == SC)) + to[i].wc = 0xFEF8; + else + to[i].wc = 0xFEF7; + break; + case 0x625: + ligFlag = true; + if ((tempShape == SL) || (tempShape == SD) || (tempShape == SC)) + to[i].wc = 0xFEFA; + else + to[i].wc = 0xFEF9; + break; + case 0x627: + ligFlag = true; + if ((tempShape == SL) || (tempShape == SD) || (tempShape == SC)) + to[i].wc = 0xFEFC; + else + to[i].wc = 0xFEFB; + break; + } + if (ligFlag) { + to[i-1].wc = 0x20; + ligFlag = false; + break; + } + } + + if ((tempShape == SL) || (tempShape == SD) || (tempShape == SC)) { + tempShape = (i > 0 ? STYPE(line[i-1].wc) : SU); + if ((tempShape == SR) || (tempShape == SD) || (tempShape == SC)) + to[i].wc = SMEDIAL((SISOLATED(line[i].wc))); + else + to[i].wc = SFINAL((SISOLATED(line[i].wc))); + break; + } + + tempShape = (i > 0 ? STYPE(line[i-1].wc) : SU); + if ((tempShape == SR) || (tempShape == SD) || (tempShape == SC)) + to[i].wc = SINITIAL((SISOLATED(line[i].wc))); + else + to[i].wc = SISOLATED(line[i].wc); + break; + + + } + } + return 1; +} + +/* + * The Main Bidi Function, and the only function that should + * be used by the outside world. + * + * line: a buffer of size count containing text to apply + * the Bidirectional algorithm to. + */ + +int do_bidi(bidi_char *line, int count) +{ + unsigned char* types; + unsigned char* levels; + unsigned char paragraphLevel; + unsigned char currentEmbedding; + unsigned char currentOverride; + unsigned char tempType; + int i, j; + bool yes, bover; + + /* Check the presence of R or AL types as optimization */ + yes = false; + for (i=0; i<count; i++) { + int type = getType(line[i].wc); + if (type == R || type == AL) { + yes = true; + break; + } + } + if (!yes) + return L; + + /* Initialize types, levels */ + types = snewn(count, unsigned char); + levels = snewn(count, unsigned char); + + /* Rule (P1) NOT IMPLEMENTED + * P1. Split the text into separate paragraphs. A paragraph separator is + * kept with the previous paragraph. Within each paragraph, apply all the + * other rules of this algorithm. + */ + + /* Rule (P2), (P3) + * P2. In each paragraph, find the first character of type L, AL, or R. + * P3. If a character is found in P2 and it is of type AL or R, then set + * the paragraph embedding level to one; otherwise, set it to zero. + */ + paragraphLevel = 0; + for (i=0; i<count ; i++) { + int type = getType(line[i].wc); + if (type == R || type == AL) { + paragraphLevel = 1; + break; + } else if (type == L) + break; + } + + /* Rule (X1) + * X1. Begin by setting the current embedding level to the paragraph + * embedding level. Set the directional override status to neutral. + */ + currentEmbedding = paragraphLevel; + currentOverride = ON; + + /* Rule (X2), (X3), (X4), (X5), (X6), (X7), (X8) + * X2. With each RLE, compute the least greater odd embedding level. + * X3. With each LRE, compute the least greater even embedding level. + * X4. With each RLO, compute the least greater odd embedding level. + * X5. With each LRO, compute the least greater even embedding level. + * X6. For all types besides RLE, LRE, RLO, LRO, and PDF: + * a. Set the level of the current character to the current + * embedding level. + * b. Whenever the directional override status is not neutral, + * reset the current character type to the directional + * override status. + * X7. With each PDF, determine the matching embedding or override code. + * If there was a valid matching code, restore (pop) the last + * remembered (pushed) embedding level and directional override. + * X8. All explicit directional embeddings and overrides are completely + * terminated at the end of each paragraph. Paragraph separators are not + * included in the embedding. (Useless here) NOT IMPLEMENTED + */ + bover = false; + for (i=0; i<count; i++) { + tempType = getType(line[i].wc); + switch (tempType) { + case RLE: + currentEmbedding = levels[i] = leastGreaterOdd(currentEmbedding); + levels[i] = setOverrideBits(levels[i], currentOverride); + currentOverride = ON; + break; + + case LRE: + currentEmbedding = levels[i] = leastGreaterEven(currentEmbedding); + levels[i] = setOverrideBits(levels[i], currentOverride); + currentOverride = ON; + break; + + case RLO: + currentEmbedding = levels[i] = leastGreaterOdd(currentEmbedding); + tempType = currentOverride = R; + bover = true; + break; + + case LRO: + currentEmbedding = levels[i] = leastGreaterEven(currentEmbedding); + tempType = currentOverride = L; + bover = true; + break; + + case PDF: { + int prevlevel = getPreviousLevel(levels, i); + + if (prevlevel == -1) { + currentEmbedding = paragraphLevel; + currentOverride = ON; + } else { + currentOverride = currentEmbedding & OMASK; + currentEmbedding = currentEmbedding & ~OMASK; + } + levels[i] = currentEmbedding; + break; + } + + /* Whitespace is treated as neutral for now */ + case WS: + case S: + levels[i] = currentEmbedding; + tempType = ON; + if (currentOverride != ON) + tempType = currentOverride; + break; + + default: + levels[i] = currentEmbedding; + if (currentOverride != ON) + tempType = currentOverride; + break; + + } + types[i] = tempType; + } + /* this clears out all overrides, so we can use levels safely... */ + /* checks bover first */ + if (bover) + for (i=0; i<count; i++) + levels[i] = levels[i] & LMASK; + + /* Rule (X9) + * X9. Remove all RLE, LRE, RLO, LRO, PDF, and BN codes. + * Here, they're converted to BN. + */ + for (i=0; i<count; i++) { + switch (types[i]) { + case RLE: + case LRE: + case RLO: + case LRO: + case PDF: + types[i] = BN; + break; + } + } + + /* Rule (W1) + * W1. Examine each non-spacing mark (NSM) in the level run, and change + * the type of the NSM to the type of the previous character. If the NSM + * is at the start of the level run, it will get the type of sor. + */ + if (types[0] == NSM) + types[0] = paragraphLevel; + + for (i=1; i<count; i++) { + if (types[i] == NSM) + types[i] = types[i-1]; + /* Is this a safe assumption? + * I assumed the previous, IS a character. + */ + } + + /* Rule (W2) + * W2. Search backwards from each instance of a European number until the + * first strong type (R, L, AL, or sor) is found. If an AL is found, + * change the type of the European number to Arabic number. + */ + for (i=0; i<count; i++) { + if (types[i] == EN) { + j=i; + while (j >= 0) { + if (types[j] == AL) { + types[i] = AN; + break; + } else if (types[j] == R || types[j] == L) { + break; + } + j--; + } + } + } + + /* Rule (W3) + * W3. Change all ALs to R. + * + * Optimization: on Rule Xn, we might set a flag on AL type + * to prevent this loop in L R lines only... + */ + for (i=0; i<count; i++) { + if (types[i] == AL) + types[i] = R; + } + + /* Rule (W4) + * W4. A single European separator between two European numbers changes + * to a European number. A single common separator between two numbers + * of the same type changes to that type. + */ + for (i=1; i<(count-1); i++) { + if (types[i] == ES) { + if (types[i-1] == EN && types[i+1] == EN) + types[i] = EN; + } else if (types[i] == CS) { + if (types[i-1] == EN && types[i+1] == EN) + types[i] = EN; + else if (types[i-1] == AN && types[i+1] == AN) + types[i] = AN; + } + } + + /* Rule (W5) + * W5. A sequence of European terminators adjacent to European numbers + * changes to all European numbers. + * + * Optimization: lots here... else ifs need rearrangement + */ + for (i=0; i<count; i++) { + if (types[i] == ET) { + if (i > 0 && types[i-1] == EN) { + types[i] = EN; + continue; + } else if (i < count-1 && types[i+1] == EN) { + types[i] = EN; + continue; + } else if (i < count-1 && types[i+1] == ET) { + j=i; + while (j < count-1 && types[j] == ET) { + j++; + } + if (types[j] == EN) + types[i] = EN; + } + } + } + + /* Rule (W6) + * W6. Otherwise, separators and terminators change to Other Neutral: + */ + for (i=0; i<count; i++) { + switch (types[i]) { + case ES: + case ET: + case CS: + types[i] = ON; + break; + } + } + + /* Rule (W7) + * W7. Search backwards from each instance of a European number until + * the first strong type (R, L, or sor) is found. If an L is found, + * then change the type of the European number to L. + */ + for (i=0; i<count; i++) { + if (types[i] == EN) { + j=i; + while (j >= 0) { + if (types[j] == L) { + types[i] = L; + break; + } else if (types[j] == R || types[j] == AL) { + break; + } + j--; + } + } + } + + /* Rule (N1) + * N1. A sequence of neutrals takes the direction of the surrounding + * strong text if the text on both sides has the same direction. European + * and Arabic numbers are treated as though they were R. + */ + if (count >= 2 && types[0] == ON) { + if ((types[1] == R) || (types[1] == EN) || (types[1] == AN)) + types[0] = R; + else if (types[1] == L) + types[0] = L; + } + for (i=1; i<(count-1); i++) { + if (types[i] == ON) { + if (types[i-1] == L) { + j=i; + while (j<(count-1) && types[j] == ON) { + j++; + } + if (types[j] == L) { + while (i<j) { + types[i] = L; + i++; + } + } + + } else if ((types[i-1] == R) || + (types[i-1] == EN) || + (types[i-1] == AN)) { + j=i; + while (j<(count-1) && types[j] == ON) { + j++; + } + if ((types[j] == R) || + (types[j] == EN) || + (types[j] == AN)) { + while (i<j) { + types[i] = R; + i++; + } + } + } + } + } + if (count >= 2 && types[count-1] == ON) { + if (types[count-2] == R || types[count-2] == EN || types[count-2] == AN) + types[count-1] = R; + else if (types[count-2] == L) + types[count-1] = L; + } + + /* Rule (N2) + * N2. Any remaining neutrals take the embedding direction. + */ + for (i=0; i<count; i++) { + if (types[i] == ON) { + if ((levels[i] % 2) == 0) + types[i] = L; + else + types[i] = R; + } + } + + /* Rule (I1) + * I1. For all characters with an even (left-to-right) embedding + * direction, those of type R go up one level and those of type AN or + * EN go up two levels. + */ + for (i=0; i<count; i++) { + if ((levels[i] % 2) == 0) { + if (types[i] == R) + levels[i] += 1; + else if (types[i] == AN || types[i] == EN) + levels[i] += 2; + } + } + + /* Rule (I2) + * I2. For all characters with an odd (right-to-left) embedding direction, + * those of type L, EN or AN go up one level. + */ + for (i=0; i<count; i++) { + if ((levels[i] % 2) == 1) { + if (types[i] == L || types[i] == EN || types[i] == AN) + levels[i] += 1; + } + } + + /* Rule (L1) + * L1. On each line, reset the embedding level of the following characters + * to the paragraph embedding level: + * (1)segment separators, (2)paragraph separators, + * (3)any sequence of whitespace characters preceding + * a segment separator or paragraph separator, + * (4)and any sequence of white space characters + * at the end of the line. + * The types of characters used here are the original types, not those + * modified by the previous phase. + */ + j=count-1; + while (j>0 && (getType(line[j].wc) == WS)) { + j--; + } + if (j < (count-1)) { + for (j++; j<count; j++) + levels[j] = paragraphLevel; + } + for (i=0; i<count; i++) { + tempType = getType(line[i].wc); + if (tempType == WS) { + j=i; + while (j<count && (getType(line[j].wc) == WS)) { + j++; + } + if (j==count || getType(line[j].wc) == B || + getType(line[j].wc) == S) { + for (j--; j>=i ; j--) { + levels[j] = paragraphLevel; + } + } + } else if (tempType == B || tempType == S) { + levels[i] = paragraphLevel; + } + } + + /* Rule (L4) NOT IMPLEMENTED + * L4. A character that possesses the mirrored property as specified by + * Section 4.7, Mirrored, must be depicted by a mirrored glyph if the + * resolved directionality of that character is R. + */ + /* Note: this is implemented before L2 for efficiency */ + for (i=0; i<count; i++) + if ((levels[i] % 2) == 1) + doMirror(&line[i].wc); + + /* Rule (L2) + * L2. From the highest level found in the text to the lowest odd level on + * each line, including intermediate levels not actually present in the + * text, reverse any contiguous sequence of characters that are at that + * level or higher + */ + /* we flip the character string and leave the level array */ + i=0; + tempType = levels[0]; + while (i < count) { + if (levels[i] > tempType) + tempType = levels[i]; + i++; + } + /* maximum level in tempType. */ + while (tempType > 0) { /* loop from highest level to the least odd, */ + /* which i assume is 1 */ + flipThisRun(line, levels, tempType, count); + tempType--; + } + + /* Rule (L3) NOT IMPLEMENTED + * L3. Combining marks applied to a right-to-left base character will at + * this point precede their base character. If the rendering engine + * expects them to follow the base characters in the final display + * process, then the ordering of the marks and the base character must + * be reversed. + */ + sfree(types); + sfree(levels); + return R; +} + + +/* + * Bad, Horrible function + * takes a pointer to a character that is checked for + * having a mirror glyph. + */ +static void doMirror(unsigned int *ch) +{ + if ((*ch & 0xFF00) == 0) { + switch (*ch) { + case 0x0028: *ch = 0x0029; break; + case 0x0029: *ch = 0x0028; break; + case 0x003C: *ch = 0x003E; break; + case 0x003E: *ch = 0x003C; break; + case 0x005B: *ch = 0x005D; break; + case 0x005D: *ch = 0x005B; break; + case 0x007B: *ch = 0x007D; break; + case 0x007D: *ch = 0x007B; break; + case 0x00AB: *ch = 0x00BB; break; + case 0x00BB: *ch = 0x00AB; break; + } + } else if ((*ch & 0xFF00) == 0x2000) { + switch (*ch) { + case 0x2039: *ch = 0x203A; break; + case 0x203A: *ch = 0x2039; break; + case 0x2045: *ch = 0x2046; break; + case 0x2046: *ch = 0x2045; break; + case 0x207D: *ch = 0x207E; break; + case 0x207E: *ch = 0x207D; break; + case 0x208D: *ch = 0x208E; break; + case 0x208E: *ch = 0x208D; break; + } + } else if ((*ch & 0xFF00) == 0x2200) { + switch (*ch) { + case 0x2208: *ch = 0x220B; break; + case 0x2209: *ch = 0x220C; break; + case 0x220A: *ch = 0x220D; break; + case 0x220B: *ch = 0x2208; break; + case 0x220C: *ch = 0x2209; break; + case 0x220D: *ch = 0x220A; break; + case 0x2215: *ch = 0x29F5; break; + case 0x223C: *ch = 0x223D; break; + case 0x223D: *ch = 0x223C; break; + case 0x2243: *ch = 0x22CD; break; + case 0x2252: *ch = 0x2253; break; + case 0x2253: *ch = 0x2252; break; + case 0x2254: *ch = 0x2255; break; + case 0x2255: *ch = 0x2254; break; + case 0x2264: *ch = 0x2265; break; + case 0x2265: *ch = 0x2264; break; + case 0x2266: *ch = 0x2267; break; + case 0x2267: *ch = 0x2266; break; + case 0x2268: *ch = 0x2269; break; + case 0x2269: *ch = 0x2268; break; + case 0x226A: *ch = 0x226B; break; + case 0x226B: *ch = 0x226A; break; + case 0x226E: *ch = 0x226F; break; + case 0x226F: *ch = 0x226E; break; + case 0x2270: *ch = 0x2271; break; + case 0x2271: *ch = 0x2270; break; + case 0x2272: *ch = 0x2273; break; + case 0x2273: *ch = 0x2272; break; + case 0x2274: *ch = 0x2275; break; + case 0x2275: *ch = 0x2274; break; + case 0x2276: *ch = 0x2277; break; + case 0x2277: *ch = 0x2276; break; + case 0x2278: *ch = 0x2279; break; + case 0x2279: *ch = 0x2278; break; + case 0x227A: *ch = 0x227B; break; + case 0x227B: *ch = 0x227A; break; + case 0x227C: *ch = 0x227D; break; + case 0x227D: *ch = 0x227C; break; + case 0x227E: *ch = 0x227F; break; + case 0x227F: *ch = 0x227E; break; + case 0x2280: *ch = 0x2281; break; + case 0x2281: *ch = 0x2280; break; + case 0x2282: *ch = 0x2283; break; + case 0x2283: *ch = 0x2282; break; + case 0x2284: *ch = 0x2285; break; + case 0x2285: *ch = 0x2284; break; + case 0x2286: *ch = 0x2287; break; + case 0x2287: *ch = 0x2286; break; + case 0x2288: *ch = 0x2289; break; + case 0x2289: *ch = 0x2288; break; + case 0x228A: *ch = 0x228B; break; + case 0x228B: *ch = 0x228A; break; + case 0x228F: *ch = 0x2290; break; + case 0x2290: *ch = 0x228F; break; + case 0x2291: *ch = 0x2292; break; + case 0x2292: *ch = 0x2291; break; + case 0x2298: *ch = 0x29B8; break; + case 0x22A2: *ch = 0x22A3; break; + case 0x22A3: *ch = 0x22A2; break; + case 0x22A6: *ch = 0x2ADE; break; + case 0x22A8: *ch = 0x2AE4; break; + case 0x22A9: *ch = 0x2AE3; break; + case 0x22AB: *ch = 0x2AE5; break; + case 0x22B0: *ch = 0x22B1; break; + case 0x22B1: *ch = 0x22B0; break; + case 0x22B2: *ch = 0x22B3; break; + case 0x22B3: *ch = 0x22B2; break; + case 0x22B4: *ch = 0x22B5; break; + case 0x22B5: *ch = 0x22B4; break; + case 0x22B6: *ch = 0x22B7; break; + case 0x22B7: *ch = 0x22B6; break; + case 0x22C9: *ch = 0x22CA; break; + case 0x22CA: *ch = 0x22C9; break; + case 0x22CB: *ch = 0x22CC; break; + case 0x22CC: *ch = 0x22CB; break; + case 0x22CD: *ch = 0x2243; break; + case 0x22D0: *ch = 0x22D1; break; + case 0x22D1: *ch = 0x22D0; break; + case 0x22D6: *ch = 0x22D7; break; + case 0x22D7: *ch = 0x22D6; break; + case 0x22D8: *ch = 0x22D9; break; + case 0x22D9: *ch = 0x22D8; break; + case 0x22DA: *ch = 0x22DB; break; + case 0x22DB: *ch = 0x22DA; break; + case 0x22DC: *ch = 0x22DD; break; + case 0x22DD: *ch = 0x22DC; break; + case 0x22DE: *ch = 0x22DF; break; + case 0x22DF: *ch = 0x22DE; break; + case 0x22E0: *ch = 0x22E1; break; + case 0x22E1: *ch = 0x22E0; break; + case 0x22E2: *ch = 0x22E3; break; + case 0x22E3: *ch = 0x22E2; break; + case 0x22E4: *ch = 0x22E5; break; + case 0x22E5: *ch = 0x22E4; break; + case 0x22E6: *ch = 0x22E7; break; + case 0x22E7: *ch = 0x22E6; break; + case 0x22E8: *ch = 0x22E9; break; + case 0x22E9: *ch = 0x22E8; break; + case 0x22EA: *ch = 0x22EB; break; + case 0x22EB: *ch = 0x22EA; break; + case 0x22EC: *ch = 0x22ED; break; + case 0x22ED: *ch = 0x22EC; break; + case 0x22F0: *ch = 0x22F1; break; + case 0x22F1: *ch = 0x22F0; break; + case 0x22F2: *ch = 0x22FA; break; + case 0x22F3: *ch = 0x22FB; break; + case 0x22F4: *ch = 0x22FC; break; + case 0x22F6: *ch = 0x22FD; break; + case 0x22F7: *ch = 0x22FE; break; + case 0x22FA: *ch = 0x22F2; break; + case 0x22FB: *ch = 0x22F3; break; + case 0x22FC: *ch = 0x22F4; break; + case 0x22FD: *ch = 0x22F6; break; + case 0x22FE: *ch = 0x22F7; break; + } + } else if ((*ch & 0xFF00) == 0x2300) { + switch (*ch) { + case 0x2308: *ch = 0x2309; break; + case 0x2309: *ch = 0x2308; break; + case 0x230A: *ch = 0x230B; break; + case 0x230B: *ch = 0x230A; break; + case 0x2329: *ch = 0x232A; break; + case 0x232A: *ch = 0x2329; break; + } + } else if ((*ch & 0xFF00) == 0x2700) { + switch (*ch) { + case 0x2768: *ch = 0x2769; break; + case 0x2769: *ch = 0x2768; break; + case 0x276A: *ch = 0x276B; break; + case 0x276B: *ch = 0x276A; break; + case 0x276C: *ch = 0x276D; break; + case 0x276D: *ch = 0x276C; break; + case 0x276E: *ch = 0x276F; break; + case 0x276F: *ch = 0x276E; break; + case 0x2770: *ch = 0x2771; break; + case 0x2771: *ch = 0x2770; break; + case 0x2772: *ch = 0x2773; break; + case 0x2773: *ch = 0x2772; break; + case 0x2774: *ch = 0x2775; break; + case 0x2775: *ch = 0x2774; break; + case 0x27D5: *ch = 0x27D6; break; + case 0x27D6: *ch = 0x27D5; break; + case 0x27DD: *ch = 0x27DE; break; + case 0x27DE: *ch = 0x27DD; break; + case 0x27E2: *ch = 0x27E3; break; + case 0x27E3: *ch = 0x27E2; break; + case 0x27E4: *ch = 0x27E5; break; + case 0x27E5: *ch = 0x27E4; break; + case 0x27E6: *ch = 0x27E7; break; + case 0x27E7: *ch = 0x27E6; break; + case 0x27E8: *ch = 0x27E9; break; + case 0x27E9: *ch = 0x27E8; break; + case 0x27EA: *ch = 0x27EB; break; + case 0x27EB: *ch = 0x27EA; break; + } + } else if ((*ch & 0xFF00) == 0x2900) { + switch (*ch) { + case 0x2983: *ch = 0x2984; break; + case 0x2984: *ch = 0x2983; break; + case 0x2985: *ch = 0x2986; break; + case 0x2986: *ch = 0x2985; break; + case 0x2987: *ch = 0x2988; break; + case 0x2988: *ch = 0x2987; break; + case 0x2989: *ch = 0x298A; break; + case 0x298A: *ch = 0x2989; break; + case 0x298B: *ch = 0x298C; break; + case 0x298C: *ch = 0x298B; break; + case 0x298D: *ch = 0x2990; break; + case 0x298E: *ch = 0x298F; break; + case 0x298F: *ch = 0x298E; break; + case 0x2990: *ch = 0x298D; break; + case 0x2991: *ch = 0x2992; break; + case 0x2992: *ch = 0x2991; break; + case 0x2993: *ch = 0x2994; break; + case 0x2994: *ch = 0x2993; break; + case 0x2995: *ch = 0x2996; break; + case 0x2996: *ch = 0x2995; break; + case 0x2997: *ch = 0x2998; break; + case 0x2998: *ch = 0x2997; break; + case 0x29B8: *ch = 0x2298; break; + case 0x29C0: *ch = 0x29C1; break; + case 0x29C1: *ch = 0x29C0; break; + case 0x29C4: *ch = 0x29C5; break; + case 0x29C5: *ch = 0x29C4; break; + case 0x29CF: *ch = 0x29D0; break; + case 0x29D0: *ch = 0x29CF; break; + case 0x29D1: *ch = 0x29D2; break; + case 0x29D2: *ch = 0x29D1; break; + case 0x29D4: *ch = 0x29D5; break; + case 0x29D5: *ch = 0x29D4; break; + case 0x29D8: *ch = 0x29D9; break; + case 0x29D9: *ch = 0x29D8; break; + case 0x29DA: *ch = 0x29DB; break; + case 0x29DB: *ch = 0x29DA; break; + case 0x29F5: *ch = 0x2215; break; + case 0x29F8: *ch = 0x29F9; break; + case 0x29F9: *ch = 0x29F8; break; + case 0x29FC: *ch = 0x29FD; break; + case 0x29FD: *ch = 0x29FC; break; + } + } else if ((*ch & 0xFF00) == 0x2A00) { + switch (*ch) { + case 0x2A2B: *ch = 0x2A2C; break; + case 0x2A2C: *ch = 0x2A2B; break; + case 0x2A2D: *ch = 0x2A2C; break; + case 0x2A2E: *ch = 0x2A2D; break; + case 0x2A34: *ch = 0x2A35; break; + case 0x2A35: *ch = 0x2A34; break; + case 0x2A3C: *ch = 0x2A3D; break; + case 0x2A3D: *ch = 0x2A3C; break; + case 0x2A64: *ch = 0x2A65; break; + case 0x2A65: *ch = 0x2A64; break; + case 0x2A79: *ch = 0x2A7A; break; + case 0x2A7A: *ch = 0x2A79; break; + case 0x2A7D: *ch = 0x2A7E; break; + case 0x2A7E: *ch = 0x2A7D; break; + case 0x2A7F: *ch = 0x2A80; break; + case 0x2A80: *ch = 0x2A7F; break; + case 0x2A81: *ch = 0x2A82; break; + case 0x2A82: *ch = 0x2A81; break; + case 0x2A83: *ch = 0x2A84; break; + case 0x2A84: *ch = 0x2A83; break; + case 0x2A8B: *ch = 0x2A8C; break; + case 0x2A8C: *ch = 0x2A8B; break; + case 0x2A91: *ch = 0x2A92; break; + case 0x2A92: *ch = 0x2A91; break; + case 0x2A93: *ch = 0x2A94; break; + case 0x2A94: *ch = 0x2A93; break; + case 0x2A95: *ch = 0x2A96; break; + case 0x2A96: *ch = 0x2A95; break; + case 0x2A97: *ch = 0x2A98; break; + case 0x2A98: *ch = 0x2A97; break; + case 0x2A99: *ch = 0x2A9A; break; + case 0x2A9A: *ch = 0x2A99; break; + case 0x2A9B: *ch = 0x2A9C; break; + case 0x2A9C: *ch = 0x2A9B; break; + case 0x2AA1: *ch = 0x2AA2; break; + case 0x2AA2: *ch = 0x2AA1; break; + case 0x2AA6: *ch = 0x2AA7; break; + case 0x2AA7: *ch = 0x2AA6; break; + case 0x2AA8: *ch = 0x2AA9; break; + case 0x2AA9: *ch = 0x2AA8; break; + case 0x2AAA: *ch = 0x2AAB; break; + case 0x2AAB: *ch = 0x2AAA; break; + case 0x2AAC: *ch = 0x2AAD; break; + case 0x2AAD: *ch = 0x2AAC; break; + case 0x2AAF: *ch = 0x2AB0; break; + case 0x2AB0: *ch = 0x2AAF; break; + case 0x2AB3: *ch = 0x2AB4; break; + case 0x2AB4: *ch = 0x2AB3; break; + case 0x2ABB: *ch = 0x2ABC; break; + case 0x2ABC: *ch = 0x2ABB; break; + case 0x2ABD: *ch = 0x2ABE; break; + case 0x2ABE: *ch = 0x2ABD; break; + case 0x2ABF: *ch = 0x2AC0; break; + case 0x2AC0: *ch = 0x2ABF; break; + case 0x2AC1: *ch = 0x2AC2; break; + case 0x2AC2: *ch = 0x2AC1; break; + case 0x2AC3: *ch = 0x2AC4; break; + case 0x2AC4: *ch = 0x2AC3; break; + case 0x2AC5: *ch = 0x2AC6; break; + case 0x2AC6: *ch = 0x2AC5; break; + case 0x2ACD: *ch = 0x2ACE; break; + case 0x2ACE: *ch = 0x2ACD; break; + case 0x2ACF: *ch = 0x2AD0; break; + case 0x2AD0: *ch = 0x2ACF; break; + case 0x2AD1: *ch = 0x2AD2; break; + case 0x2AD2: *ch = 0x2AD1; break; + case 0x2AD3: *ch = 0x2AD4; break; + case 0x2AD4: *ch = 0x2AD3; break; + case 0x2AD5: *ch = 0x2AD6; break; + case 0x2AD6: *ch = 0x2AD5; break; + case 0x2ADE: *ch = 0x22A6; break; + case 0x2AE3: *ch = 0x22A9; break; + case 0x2AE4: *ch = 0x22A8; break; + case 0x2AE5: *ch = 0x22AB; break; + case 0x2AEC: *ch = 0x2AED; break; + case 0x2AED: *ch = 0x2AEC; break; + case 0x2AF7: *ch = 0x2AF8; break; + case 0x2AF8: *ch = 0x2AF7; break; + case 0x2AF9: *ch = 0x2AFA; break; + case 0x2AFA: *ch = 0x2AF9; break; + } + } else if ((*ch & 0xFF00) == 0x3000) { + switch (*ch) { + case 0x3008: *ch = 0x3009; break; + case 0x3009: *ch = 0x3008; break; + case 0x300A: *ch = 0x300B; break; + case 0x300B: *ch = 0x300A; break; + case 0x300C: *ch = 0x300D; break; + case 0x300D: *ch = 0x300C; break; + case 0x300E: *ch = 0x300F; break; + case 0x300F: *ch = 0x300E; break; + case 0x3010: *ch = 0x3011; break; + case 0x3011: *ch = 0x3010; break; + case 0x3014: *ch = 0x3015; break; + case 0x3015: *ch = 0x3014; break; + case 0x3016: *ch = 0x3017; break; + case 0x3017: *ch = 0x3016; break; + case 0x3018: *ch = 0x3019; break; + case 0x3019: *ch = 0x3018; break; + case 0x301A: *ch = 0x301B; break; + case 0x301B: *ch = 0x301A; break; + } + } else if ((*ch & 0xFF00) == 0xFF00) { + switch (*ch) { + case 0xFF08: *ch = 0xFF09; break; + case 0xFF09: *ch = 0xFF08; break; + case 0xFF1C: *ch = 0xFF1E; break; + case 0xFF1E: *ch = 0xFF1C; break; + case 0xFF3B: *ch = 0xFF3D; break; + case 0xFF3D: *ch = 0xFF3B; break; + case 0xFF5B: *ch = 0xFF5D; break; + case 0xFF5D: *ch = 0xFF5B; break; + case 0xFF5F: *ch = 0xFF60; break; + case 0xFF60: *ch = 0xFF5F; break; + case 0xFF62: *ch = 0xFF63; break; + case 0xFF63: *ch = 0xFF62; break; + } + } +} + +#ifdef TEST_GETTYPE + +#include <stdio.h> +#include <assert.h> + +int main(int argc, char **argv) +{ + static const struct { int type; char *name; } typetoname[] = { +#define TYPETONAME(X) { X , #X } + TYPETONAME(L), + TYPETONAME(LRE), + TYPETONAME(LRO), + TYPETONAME(R), + TYPETONAME(AL), + TYPETONAME(RLE), + TYPETONAME(RLO), + TYPETONAME(PDF), + TYPETONAME(EN), + TYPETONAME(ES), + TYPETONAME(ET), + TYPETONAME(AN), + TYPETONAME(CS), + TYPETONAME(NSM), + TYPETONAME(BN), + TYPETONAME(B), + TYPETONAME(S), + TYPETONAME(WS), + TYPETONAME(ON), +#undef TYPETONAME + }; + int i; + + for (i = 1; i < argc; i++) { + unsigned long chr = strtoul(argv[i], NULL, 0); + int type = getType(chr); + assert(typetoname[type].type == type); + printf("U+%04x: %s\n", (unsigned)chr, typetoname[type].name); + } + + return 0; +} + +#endif diff --git a/terminal/terminal.c b/terminal/terminal.c new file mode 100644 index 00000000..ddeb1e94 --- /dev/null +++ b/terminal/terminal.c @@ -0,0 +1,7699 @@ +/* + * Terminal emulator. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <limits.h> +#include <wchar.h> + +#include <time.h> +#include <assert.h> +#include "putty.h" +#include "terminal.h" + +#define VT52_PLUS + +#define CL_ANSIMIN 0x0001 /* Codes in all ANSI like terminals. */ +#define CL_VT100 0x0002 /* VT100 */ +#define CL_VT100AVO 0x0004 /* VT100 +AVO; 132x24 (not 132x14) & attrs */ +#define CL_VT102 0x0008 /* VT102 */ +#define CL_VT220 0x0010 /* VT220 */ +#define CL_VT320 0x0020 /* VT320 */ +#define CL_VT420 0x0040 /* VT420 */ +#define CL_VT510 0x0080 /* VT510, NB VT510 includes ANSI */ +#define CL_VT340TEXT 0x0100 /* VT340 extensions that appear in the VT420 */ +#define CL_SCOANSI 0x1000 /* SCOANSI not in ANSIMIN. */ +#define CL_ANSI 0x2000 /* ANSI ECMA-48 not in the VT100..VT420 */ +#define CL_OTHER 0x4000 /* Others, Xterm, linux, putty, dunno, etc */ + +#define TM_VT100 (CL_ANSIMIN|CL_VT100) +#define TM_VT100AVO (TM_VT100|CL_VT100AVO) +#define TM_VT102 (TM_VT100AVO|CL_VT102) +#define TM_VT220 (TM_VT102|CL_VT220) +#define TM_VTXXX (TM_VT220|CL_VT340TEXT|CL_VT510|CL_VT420|CL_VT320) +#define TM_SCOANSI (CL_ANSIMIN|CL_SCOANSI) + +#define TM_PUTTY (0xFFFF) + +#define UPDATE_DELAY ((TICKSPERSEC+49)/50)/* ticks to defer window update */ +#define TBLINK_DELAY ((TICKSPERSEC*9+19)/20)/* ticks between text blinks*/ +#define CBLINK_DELAY (CURSORBLINK) /* ticks between cursor blinks */ +#define VBELL_DELAY (VBELL_TIMEOUT) /* visual bell timeout in ticks */ + +#define compatibility(x) \ + if ( ((CL_##x)&term->compatibility_level) == 0 ) { \ + term->termstate=TOPLEVEL; \ + break; \ + } +#define compatibility2(x,y) \ + if ( ((CL_##x|CL_##y)&term->compatibility_level) == 0 ) { \ + term->termstate=TOPLEVEL; \ + break; \ + } + +#define has_compat(x) ( ((CL_##x)&term->compatibility_level) != 0 ) + +static const char *const EMPTY_WINDOW_TITLE = ""; + +static const char sco2ansicolour[] = { 0, 4, 2, 6, 1, 5, 3, 7 }; + +#define sel_nl_sz (sizeof(sel_nl)/sizeof(wchar_t)) +static const wchar_t sel_nl[] = SEL_NL; + +/* + * Fetch the character at a particular position in a line array, + * for purposes of `wordtype'. The reason this isn't just a simple + * array reference is that if the character we find is UCSWIDE, + * then we must look one space further to the left. + */ +#define UCSGET(a, x) \ + ( (x)>0 && (a)[(x)].chr == UCSWIDE ? (a)[(x)-1].chr : (a)[(x)].chr ) + +/* + * Detect the various aliases of U+0020 SPACE. + */ +#define IS_SPACE_CHR(chr) \ + ((chr) == 0x20 || (DIRECT_CHAR(chr) && ((chr) & 0xFF) == 0x20)) + +/* + * Spot magic CSETs. + */ +#define CSET_OF(chr) (DIRECT_CHAR(chr)||DIRECT_FONT(chr) ? (chr)&CSET_MASK : 0) + +/* + * Internal prototypes. + */ +static void resizeline(Terminal *, termline *, int); +static termline *lineptr(Terminal *, int, int, int); +static void unlineptr(termline *); +static void check_line_size(Terminal *, termline *); +static void do_paint(Terminal *); +static void erase_lots(Terminal *, bool, bool, bool); +static int find_last_nonempty_line(Terminal *, tree234 *); +static void swap_screen(Terminal *, int, bool, bool); +static void update_sbar(Terminal *); +static void deselect(Terminal *); +static void term_print_finish(Terminal *); +static void scroll(Terminal *, int, int, int, bool); +static void parse_optionalrgb(optionalrgb *out, unsigned *values); +static void term_added_data(Terminal *term); +static void term_update_raw_mouse_mode(Terminal *term); + +static termline *newtermline(Terminal *term, int cols, bool bce) +{ + termline *line; + int j; + + line = snew(termline); + line->chars = snewn(cols, termchar); + for (j = 0; j < cols; j++) + line->chars[j] = (bce ? term->erase_char : term->basic_erase_char); + line->cols = line->size = cols; + line->lattr = LATTR_NORM; + line->trusted = false; + line->temporary = false; + line->cc_free = 0; + + return line; +} + +static void freetermline(termline *line) +{ + if (line) { + sfree(line->chars); + sfree(line); + } +} + +static void unlineptr(termline *line) +{ + if (line->temporary) + freetermline(line); +} + +const int colour_indices_conf_to_oscp[CONF_NCOLOURS] = { + #define COLOUR_ENTRY(id,name) OSCP_COLOUR_##id, + CONF_COLOUR_LIST(COLOUR_ENTRY) + #undef COLOUR_ENTRY +}; + +const int colour_indices_conf_to_osc4[CONF_NCOLOURS] = { + #define COLOUR_ENTRY(id,name) OSC4_COLOUR_##id, + CONF_COLOUR_LIST(COLOUR_ENTRY) + #undef COLOUR_ENTRY +}; + +const int colour_indices_oscp_to_osc4[OSCP_NCOLOURS] = { + #define COLOUR_ENTRY(id) OSC4_COLOUR_##id, + OSCP_COLOUR_LIST(COLOUR_ENTRY) + #undef COLOUR_ENTRY +}; + +#ifdef TERM_CC_DIAGS +/* + * Diagnostic function: verify that a termline has a correct + * combining character structure. + * + * This is a performance-intensive check, so it's no longer enabled + * by default. + */ +static void cc_check(termline *line) +{ + unsigned char *flags; + int i, j; + + assert(line->size >= line->cols); + + flags = snewn(line->size, unsigned char); + + for (i = 0; i < line->size; i++) + flags[i] = (i < line->cols); + + for (i = 0; i < line->cols; i++) { + j = i; + while (line->chars[j].cc_next) { + j += line->chars[j].cc_next; + assert(j >= line->cols && j < line->size); + assert(!flags[j]); + flags[j] = true; + } + } + + j = line->cc_free; + if (j) { + while (1) { + assert(j >= line->cols && j < line->size); + assert(!flags[j]); + flags[j] = true; + if (line->chars[j].cc_next) + j += line->chars[j].cc_next; + else + break; + } + } + + j = 0; + for (i = 0; i < line->size; i++) + j += (flags[i] != 0); + + assert(j == line->size); + + sfree(flags); +} +#endif + +static void clear_cc(termline *line, int col); + +/* + * Add a combining character to a character cell. + */ +static void add_cc(termline *line, int col, unsigned long chr) +{ + int newcc; + + assert(col >= 0 && col < line->cols); + + /* + * Don't add combining characters at all to U+FFFD REPLACEMENT + * CHARACTER. (Partly it's a slightly incoherent idea in the first + * place; mostly, U+FFFD is what we generate if a cell already has + * too many ccs, in which case we want it to be a fixed point when + * further ccs are added.) + */ + if (line->chars[col].chr == 0xFFFD) + return; + + /* + * Walk the cc list of the cell in question to find its current + * end point. + */ + size_t ncc = 0; + int origcol = col; + while (line->chars[col].cc_next) { + col += line->chars[col].cc_next; + if (++ncc >= CC_LIMIT) { + /* + * There are already too many combining characters in this + * character cell. Change strategy: throw out the entire + * chain and replace the main character with U+FFFD. + * + * (Rationale: extrapolating from UTR #36 section 3.6.2 + * suggests the principle that it's better to substitute + * U+FFFD than to _ignore_ input completely. Also, if the + * user copies and pastes an overcombined character cell, + * this way it will clearly indicate that we haven't + * reproduced the writer's original intentions, instead of + * looking as if it was the _writer's_ fault that the 33rd + * cc is missing.) + * + * Per the code above, this will also prevent any further + * ccs from being added to this cell. + */ + clear_cc(line, origcol); + line->chars[origcol].chr = 0xFFFD; + return; + } + } + + /* + * Extend the cols array if the free list is empty. + */ + if (!line->cc_free) { + int n = line->size; + + size_t tmpsize = line->size; + sgrowarray(line->chars, tmpsize, tmpsize); + assert(tmpsize <= INT_MAX); + line->size = tmpsize; + + line->cc_free = n; + while (n < line->size) { + if (n+1 < line->size) + line->chars[n].cc_next = 1; + else + line->chars[n].cc_next = 0; + n++; + } + } + + /* + * `col' now points at the last cc currently in this cell; so + * we simply add another one. + */ + newcc = line->cc_free; + if (line->chars[newcc].cc_next) + line->cc_free = newcc + line->chars[newcc].cc_next; + else + line->cc_free = 0; + line->chars[newcc].cc_next = 0; + line->chars[newcc].chr = chr; + line->chars[col].cc_next = newcc - col; + +#ifdef TERM_CC_DIAGS + cc_check(line); +#endif +} + +/* + * Clear the combining character list in a character cell. + */ +static void clear_cc(termline *line, int col) +{ + int oldfree, origcol = col; + + assert(col >= 0 && col < line->cols); + + if (!line->chars[col].cc_next) + return; /* nothing needs doing */ + + oldfree = line->cc_free; + line->cc_free = col + line->chars[col].cc_next; + while (line->chars[col].cc_next) + col += line->chars[col].cc_next; + if (oldfree) + line->chars[col].cc_next = oldfree - col; + else + line->chars[col].cc_next = 0; + + line->chars[origcol].cc_next = 0; + +#ifdef TERM_CC_DIAGS + cc_check(line); +#endif +} + +/* + * Compare two character cells for equality. Special case required + * in do_paint() where we override what we expect the chr and attr + * fields to be. + */ +static bool termchars_equal_override(termchar *a, termchar *b, + unsigned long bchr, unsigned long battr) +{ + /* FULL-TERMCHAR */ + if (!truecolour_equal(a->truecolour, b->truecolour)) + return false; + if (a->chr != bchr) + return false; + if ((a->attr &~ DATTR_MASK) != (battr &~ DATTR_MASK)) + return false; + while (a->cc_next || b->cc_next) { + if (!a->cc_next || !b->cc_next) + return false; /* one cc-list ends, other does not */ + a += a->cc_next; + b += b->cc_next; + if (a->chr != b->chr) + return false; + } + return true; +} + +static bool termchars_equal(termchar *a, termchar *b) +{ + return termchars_equal_override(a, b, b->chr, b->attr); +} + +/* + * Copy a character cell. (Requires a pointer to the destination + * termline, so as to access its free list.) + */ +static void copy_termchar(termline *destline, int x, termchar *src) +{ + clear_cc(destline, x); + + destline->chars[x] = *src; /* copy everything except cc-list */ + destline->chars[x].cc_next = 0; /* and make sure this is zero */ + + while (src->cc_next) { + src += src->cc_next; + add_cc(destline, x, src->chr); + } + +#ifdef TERM_CC_DIAGS + cc_check(destline); +#endif +} + +/* + * Move a character cell within its termline. + */ +static void move_termchar(termline *line, termchar *dest, termchar *src) +{ + /* First clear the cc list from the original char, just in case. */ + clear_cc(line, dest - line->chars); + + /* Move the character cell and adjust its cc_next. */ + *dest = *src; /* copy everything except cc-list */ + if (src->cc_next) + dest->cc_next = src->cc_next - (dest-src); + + /* Ensure the original cell doesn't have a cc list. */ + src->cc_next = 0; + +#ifdef TERM_CC_DIAGS + cc_check(line); +#endif +} + +/* + * Compress and decompress a termline into an RLE-based format for + * storing in scrollback. (Since scrollback almost never needs to + * be modified and exists in huge quantities, this is a sensible + * tradeoff, particularly since it allows us to continue adding + * features to the main termchar structure without proportionally + * bloating the terminal emulator's memory footprint unless those + * features are in constant use.) + */ +static void makerle(strbuf *b, termline *ldata, + void (*makeliteral)(strbuf *b, termchar *c, + unsigned long *state)) +{ + int hdrpos, hdrsize, n, prevlen, prevpos, thislen, thispos; + bool prev2; + termchar *c = ldata->chars; + unsigned long state = 0, oldstate; + + n = ldata->cols; + + hdrpos = b->len; + hdrsize = 0; + put_byte(b, 0); + prevlen = prevpos = 0; + prev2 = false; + + while (n-- > 0) { + thispos = b->len; + makeliteral(b, c++, &state); + thislen = b->len - thispos; + if (thislen == prevlen && + !memcmp(b->u + prevpos, b->u + thispos, thislen)) { + /* + * This literal precisely matches the previous one. + * Turn it into a run if it's worthwhile. + * + * With one-byte literals, it costs us two bytes to + * encode a run, plus another byte to write the header + * to resume normal output; so a three-element run is + * neutral, and anything beyond that is unconditionally + * worthwhile. With two-byte literals or more, even a + * 2-run is a win. + */ + if (thislen > 1 || prev2) { + int runpos, runlen; + + /* + * It's worth encoding a run. Start at prevpos, + * unless hdrsize==0 in which case we can back up + * another one and start by overwriting hdrpos. + */ + + hdrsize--; /* remove the literal at prevpos */ + if (prev2) { + assert(hdrsize > 0); + hdrsize--; + prevpos -= prevlen;/* and possibly another one */ + } + + if (hdrsize == 0) { + assert(prevpos == hdrpos + 1); + runpos = hdrpos; + strbuf_shrink_to(b, prevpos+prevlen); + } else { + memmove(b->u + prevpos+1, b->u + prevpos, prevlen); + runpos = prevpos; + strbuf_shrink_to(b, prevpos+prevlen+1); + /* + * Terminate the previous run of ordinary + * literals. + */ + assert(hdrsize >= 1 && hdrsize <= 128); + b->u[hdrpos] = hdrsize - 1; + } + + runlen = prev2 ? 3 : 2; + + while (n > 0 && runlen < 129) { + int tmppos, tmplen; + tmppos = b->len; + oldstate = state; + makeliteral(b, c, &state); + tmplen = b->len - tmppos; + bool match = tmplen == thislen && + !memcmp(b->u + runpos+1, b->u + tmppos, tmplen); + strbuf_shrink_to(b, tmppos); + if (!match) { + state = oldstate; + break; /* run over */ + } + n--, c++, runlen++; + } + + assert(runlen >= 2 && runlen <= 129); + b->u[runpos] = runlen + 0x80 - 2; + + hdrpos = b->len; + hdrsize = 0; + put_byte(b, 0); + /* And ensure this run doesn't interfere with the next. */ + prevlen = prevpos = 0; + prev2 = false; + + continue; + } else { + /* + * Just flag that the previous two literals were + * identical, in case we find a third identical one + * we want to turn into a run. + */ + prev2 = true; + prevlen = thislen; + prevpos = thispos; + } + } else { + prev2 = false; + prevlen = thislen; + prevpos = thispos; + } + + /* + * This character isn't (yet) part of a run. Add it to + * hdrsize. + */ + hdrsize++; + if (hdrsize == 128) { + b->u[hdrpos] = hdrsize - 1; + hdrpos = b->len; + hdrsize = 0; + put_byte(b, 0); + prevlen = prevpos = 0; + prev2 = false; + } + } + + /* + * Clean up. + */ + if (hdrsize > 0) { + assert(hdrsize <= 128); + b->u[hdrpos] = hdrsize - 1; + } else { + strbuf_shrink_to(b, hdrpos); + } +} +static void makeliteral_chr(strbuf *b, termchar *c, unsigned long *state) +{ + /* + * My encoding for characters is UTF-8-like, in that it stores + * 7-bit ASCII in one byte and uses high-bit-set bytes as + * introducers to indicate a longer sequence. However, it's + * unlike UTF-8 in that it doesn't need to be able to + * resynchronise, and therefore I don't want to waste two bits + * per byte on having recognisable continuation characters. + * Also I don't want to rule out the possibility that I may one + * day use values 0x80000000-0xFFFFFFFF for interesting + * purposes, so unlike UTF-8 I need a full 32-bit range. + * Accordingly, here is my encoding: + * + * 00000000-0000007F: 0xxxxxxx (but see below) + * 00000080-00003FFF: 10xxxxxx xxxxxxxx + * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx + * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx + * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx + * + * (`Z' is like `x' but is always going to be zero since the + * values I'm encoding don't go above 2^32. In principle the + * five-byte form of the encoding could extend to 2^35, and + * there could be six-, seven-, eight- and nine-byte forms as + * well to allow up to 64-bit values to be encoded. But that's + * completely unnecessary for these purposes!) + * + * The encoding as written above would be very simple, except + * that 7-bit ASCII can occur in several different ways in the + * terminal data; sometimes it crops up in the D800 page + * (CSET_ASCII) but at other times it's in the 0000 page (real + * Unicode). Therefore, this encoding is actually _stateful_: + * the one-byte encoding of 00-7F actually indicates `reuse the + * upper three bytes of the last character', and to encode an + * absolute value of 00-7F you need to use the two-byte form + * instead. + */ + if ((c->chr & ~0x7F) == *state) { + put_byte(b, (unsigned char)(c->chr & 0x7F)); + } else if (c->chr < 0x4000) { + put_byte(b, (unsigned char)(((c->chr >> 8) & 0x3F) | 0x80)); + put_byte(b, (unsigned char)(c->chr & 0xFF)); + } else if (c->chr < 0x200000) { + put_byte(b, (unsigned char)(((c->chr >> 16) & 0x1F) | 0xC0)); + put_uint16(b, c->chr & 0xFFFF); + } else if (c->chr < 0x10000000) { + put_byte(b, (unsigned char)(((c->chr >> 24) & 0x0F) | 0xE0)); + put_byte(b, (unsigned char)((c->chr >> 16) & 0xFF)); + put_uint16(b, c->chr & 0xFFFF); + } else { + put_byte(b, 0xF0); + put_uint32(b, c->chr); + } + *state = c->chr & ~0xFF; +} +static void makeliteral_attr(strbuf *b, termchar *c, unsigned long *state) +{ + /* + * My encoding for attributes is 16-bit-granular and assumes + * that the top bit of the word is never required. I either + * store a two-byte value with the top bit clear (indicating + * just that value), or a four-byte value with the top bit set + * (indicating the same value with its top bit clear). + * + * However, first I permute the bits of the attribute value, so + * that the eight bits of colour (four in each of fg and bg) + * which are never non-zero unless xterm 256-colour mode is in + * use are placed higher up the word than everything else. This + * ensures that attribute values remain 16-bit _unless_ the + * user uses extended colour. + */ + unsigned attr, colourbits; + + attr = c->attr; + + assert(ATTR_BGSHIFT > ATTR_FGSHIFT); + + colourbits = (attr >> (ATTR_BGSHIFT + 4)) & 0xF; + colourbits <<= 4; + colourbits |= (attr >> (ATTR_FGSHIFT + 4)) & 0xF; + + attr = (((attr >> (ATTR_BGSHIFT + 8)) << (ATTR_BGSHIFT + 4)) | + (attr & ((1 << (ATTR_BGSHIFT + 4))-1))); + attr = (((attr >> (ATTR_FGSHIFT + 8)) << (ATTR_FGSHIFT + 4)) | + (attr & ((1 << (ATTR_FGSHIFT + 4))-1))); + + attr |= (colourbits << (32-9)); + + if (attr < 0x8000) { + put_byte(b, (unsigned char)((attr >> 8) & 0xFF)); + put_byte(b, (unsigned char)(attr & 0xFF)); + } else { + put_byte(b, (unsigned char)(((attr >> 24) & 0x7F) | 0x80)); + put_byte(b, (unsigned char)((attr >> 16) & 0xFF)); + put_byte(b, (unsigned char)((attr >> 8) & 0xFF)); + put_byte(b, (unsigned char)(attr & 0xFF)); + } +} +static void makeliteral_truecolour(strbuf *b, termchar *c, unsigned long *state) +{ + /* + * Put the used parts of the colour info into the buffer. + */ + put_byte(b, ((c->truecolour.fg.enabled ? 1 : 0) | + (c->truecolour.bg.enabled ? 2 : 0))); + if (c->truecolour.fg.enabled) { + put_byte(b, c->truecolour.fg.r); + put_byte(b, c->truecolour.fg.g); + put_byte(b, c->truecolour.fg.b); + } + if (c->truecolour.bg.enabled) { + put_byte(b, c->truecolour.bg.r); + put_byte(b, c->truecolour.bg.g); + put_byte(b, c->truecolour.bg.b); + } +} +static void makeliteral_cc(strbuf *b, termchar *c, unsigned long *state) +{ + /* + * For combining characters, I just encode a bunch of ordinary + * chars using makeliteral_chr, and terminate with a \0 + * character (which I know won't come up as a combining char + * itself). + * + * I don't use the stateful encoding in makeliteral_chr. + */ + unsigned long zstate; + termchar z; + + while (c->cc_next) { + c += c->cc_next; + + assert(c->chr != 0); + + zstate = 0; + makeliteral_chr(b, c, &zstate); + } + + z.chr = 0; + zstate = 0; + makeliteral_chr(b, &z, &zstate); +} + +typedef struct compressed_scrollback_line { + size_t len; +} compressed_scrollback_line; + +static termline *decompressline(compressed_scrollback_line *line); + +static compressed_scrollback_line *compressline(termline *ldata) +{ + strbuf *b = strbuf_new(); + + /* Leave space for the header structure */ + strbuf_append(b, sizeof(compressed_scrollback_line)); + + /* + * First, store the column count, 7 bits at a time, least + * significant `digit' first, with the high bit set on all but + * the last. + */ + { + int n = ldata->cols; + while (n >= 128) { + put_byte(b, (unsigned char)((n & 0x7F) | 0x80)); + n >>= 7; + } + put_byte(b, (unsigned char)(n)); + } + + /* + * Next store the lattrs; same principle. We add one extra bit to + * this to indicate the trust state of the line. + */ + { + int n = ldata->lattr | (ldata->trusted ? 0x10000 : 0); + while (n >= 128) { + put_byte(b, (unsigned char)((n & 0x7F) | 0x80)); + n >>= 7; + } + put_byte(b, (unsigned char)(n)); + } + + /* + * Now we store a sequence of separate run-length encoded + * fragments, each containing exactly as many symbols as there + * are columns in the ldata. + * + * All of these have a common basic format: + * + * - a byte 00-7F indicates that X+1 literals follow it + * - a byte 80-FF indicates that a single literal follows it + * and expects to be repeated (X-0x80)+2 times. + * + * The format of the `literals' varies between the fragments. + */ + makerle(b, ldata, makeliteral_chr); + makerle(b, ldata, makeliteral_attr); + makerle(b, ldata, makeliteral_truecolour); + makerle(b, ldata, makeliteral_cc); + + size_t linelen = b->len - sizeof(compressed_scrollback_line); + compressed_scrollback_line *line = + (compressed_scrollback_line *)strbuf_to_str(b); + line->len = linelen; + + /* + * Diagnostics: ensure that the compressed data really does + * decompress to the right thing. + * + * This is a bit performance-heavy for production code. + */ +#ifdef TERM_CC_DIAGS +#ifndef CHECK_SB_COMPRESSION + { + termline *dcl; + int i; + +#ifdef DIAGNOSTIC_SB_COMPRESSION + for (i = 0; i < b->len; i++) { + printf(" %02x ", b->data[i]); + } + printf("\n"); +#endif + + dcl = decompressline(line); + assert(ldata->cols == dcl->cols); + assert(ldata->lattr == dcl->lattr); + for (i = 0; i < ldata->cols; i++) + assert(termchars_equal(&ldata->chars[i], &dcl->chars[i])); + +#ifdef DIAGNOSTIC_SB_COMPRESSION + printf("%d cols (%d bytes) -> %d bytes (factor of %g)\n", + ldata->cols, 4 * ldata->cols, dused, + (double)dused / (4 * ldata->cols)); +#endif + + freetermline(dcl); + } +#endif +#endif /* TERM_CC_DIAGS */ + + return line; +} + +static void readrle(BinarySource *bs, termline *ldata, + void (*readliteral)(BinarySource *bs, termchar *c, + termline *ldata, unsigned long *state)) +{ + int n = 0; + unsigned long state = 0; + + while (n < ldata->cols) { + int hdr = get_byte(bs); + + if (hdr >= 0x80) { + /* A run. */ + + size_t pos = bs->pos, count = hdr + 2 - 0x80; + while (count--) { + assert(n < ldata->cols); + bs->pos = pos; + readliteral(bs, ldata->chars + n, ldata, &state); + n++; + } + } else { + /* Just a sequence of consecutive literals. */ + + int count = hdr + 1; + while (count--) { + assert(n < ldata->cols); + readliteral(bs, ldata->chars + n, ldata, &state); + n++; + } + } + } + + assert(n == ldata->cols); +} +static void readliteral_chr(BinarySource *bs, termchar *c, termline *ldata, + unsigned long *state) +{ + int byte; + + /* + * 00000000-0000007F: 0xxxxxxx + * 00000080-00003FFF: 10xxxxxx xxxxxxxx + * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx + * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx + * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx + */ + + byte = get_byte(bs); + if (byte < 0x80) { + c->chr = byte | *state; + } else if (byte < 0xC0) { + c->chr = (byte &~ 0xC0) << 8; + c->chr |= get_byte(bs); + } else if (byte < 0xE0) { + c->chr = (byte &~ 0xE0) << 16; + c->chr |= get_uint16(bs); + } else if (byte < 0xF0) { + c->chr = (byte &~ 0xF0) << 24; + c->chr |= get_byte(bs) << 16; + c->chr |= get_uint16(bs); + } else { + assert(byte == 0xF0); + c->chr = get_uint32(bs); + } + *state = c->chr & ~0xFF; +} +static void readliteral_attr(BinarySource *bs, termchar *c, termline *ldata, + unsigned long *state) +{ + unsigned val, attr, colourbits; + + val = get_uint16(bs); + + if (val >= 0x8000) { + val &= ~0x8000; + val <<= 16; + val |= get_uint16(bs); + } + + colourbits = (val >> (32-9)) & 0xFF; + attr = (val & ((1<<(32-9))-1)); + + attr = (((attr >> (ATTR_FGSHIFT + 4)) << (ATTR_FGSHIFT + 8)) | + (attr & ((1 << (ATTR_FGSHIFT + 4))-1))); + attr = (((attr >> (ATTR_BGSHIFT + 4)) << (ATTR_BGSHIFT + 8)) | + (attr & ((1 << (ATTR_BGSHIFT + 4))-1))); + + attr |= (colourbits >> 4) << (ATTR_BGSHIFT + 4); + attr |= (colourbits & 0xF) << (ATTR_FGSHIFT + 4); + + c->attr = attr; +} +static void readliteral_truecolour( + BinarySource *bs, termchar *c, termline *ldata, unsigned long *state) +{ + int flags = get_byte(bs); + + if (flags & 1) { + c->truecolour.fg.enabled = true; + c->truecolour.fg.r = get_byte(bs); + c->truecolour.fg.g = get_byte(bs); + c->truecolour.fg.b = get_byte(bs); + } else { + c->truecolour.fg = optionalrgb_none; + } + + if (flags & 2) { + c->truecolour.bg.enabled = true; + c->truecolour.bg.r = get_byte(bs); + c->truecolour.bg.g = get_byte(bs); + c->truecolour.bg.b = get_byte(bs); + } else { + c->truecolour.bg = optionalrgb_none; + } +} +static void readliteral_cc(BinarySource *bs, termchar *c, termline *ldata, + unsigned long *state) +{ + termchar n; + unsigned long zstate; + int x = c - ldata->chars; + + c->cc_next = 0; + + while (1) { + zstate = 0; + readliteral_chr(bs, &n, ldata, &zstate); + if (!n.chr) + break; + add_cc(ldata, x, n.chr); + } +} + +static termline *decompressline(compressed_scrollback_line *line) +{ + int ncols, byte, shift; + BinarySource bs[1]; + termline *ldata; + + BinarySource_BARE_INIT(bs, line+1, line->len); + + /* + * First read in the column count. + */ + ncols = shift = 0; + do { + byte = get_byte(bs); + ncols |= (byte & 0x7F) << shift; + shift += 7; + } while (byte & 0x80); + + /* + * Now create the output termline. + */ + ldata = snew(termline); + ldata->chars = snewn(ncols, termchar); + ldata->cols = ldata->size = ncols; + ldata->temporary = true; + ldata->cc_free = 0; + + /* + * We must set all the cc pointers in ldata->chars to 0 right + * now, so that cc diagnostics that verify the integrity of the + * whole line will make sense while we're in the middle of + * building it up. + */ + { + int i; + for (i = 0; i < ldata->cols; i++) + ldata->chars[i].cc_next = 0; + } + + /* + * Now read in the lattr. + */ + int lattr = shift = 0; + do { + byte = get_byte(bs); + lattr |= (byte & 0x7F) << shift; + shift += 7; + } while (byte & 0x80); + ldata->lattr = lattr & 0xFFFF; + ldata->trusted = (lattr & 0x10000) != 0; + + /* + * Now we read in each of the RLE streams in turn. + */ + readrle(bs, ldata, readliteral_chr); + readrle(bs, ldata, readliteral_attr); + readrle(bs, ldata, readliteral_truecolour); + readrle(bs, ldata, readliteral_cc); + + /* And we always expect that we ended up exactly at the end of the + * compressed data. */ + assert(!get_err(bs)); + assert(get_avail(bs) == 0); + + return ldata; +} + +/* + * Resize a line to make it `cols' columns wide. + */ +static void resizeline(Terminal *term, termline *line, int cols) +{ + int i, oldcols; + + if (line->cols != cols) { + + oldcols = line->cols; + + /* + * This line is the wrong length, which probably means it + * hasn't been accessed since a resize. Resize it now. + * + * First, go through all the characters that will be thrown + * out in the resize (if we're shrinking the line) and + * return their cc lists to the cc free list. + */ + for (i = cols; i < oldcols; i++) + clear_cc(line, i); + + /* + * If we're shrinking the line, we now bodily move the + * entire cc section from where it started to where it now + * needs to be. (We have to do this before the resize, so + * that the data we're copying is still there. However, if + * we're expanding, we have to wait until _after_ the + * resize so that the space we're copying into is there.) + */ + if (cols < oldcols) + memmove(line->chars + cols, line->chars + oldcols, + (line->size - line->cols) * TSIZE); + + /* + * Now do the actual resize, leaving the _same_ amount of + * cc space as there was to begin with. + */ + line->size += cols - oldcols; + line->chars = sresize(line->chars, line->size, TTYPE); + line->cols = cols; + + /* + * If we're expanding the line, _now_ we move the cc + * section. + */ + if (cols > oldcols) + memmove(line->chars + cols, line->chars + oldcols, + (line->size - line->cols) * TSIZE); + + /* + * Go through what's left of the original line, and adjust + * the first cc_next pointer in each list. (All the + * subsequent ones are still valid because they are + * relative offsets within the cc block.) Also do the same + * to the head of the cc_free list. + */ + for (i = 0; i < oldcols && i < cols; i++) + if (line->chars[i].cc_next) + line->chars[i].cc_next += cols - oldcols; + if (line->cc_free) + line->cc_free += cols - oldcols; + + /* + * And finally fill in the new space with erase chars. (We + * don't have to worry about cc lists here, because we + * _know_ the erase char doesn't have one.) + */ + for (i = oldcols; i < cols; i++) + line->chars[i] = term->basic_erase_char; + +#ifdef TERM_CC_DIAGS + cc_check(line); +#endif + } +} + +/* + * Get the number of lines in the scrollback. + */ +static int sblines(Terminal *term) +{ + int sblines = count234(term->scrollback); + if (term->erase_to_scrollback && + term->alt_which && term->alt_screen) { + sblines += term->alt_sblines; + } + return sblines; +} + +static void null_line_error(Terminal *term, int y, int lineno, + tree234 *whichtree, int treeindex, + const char *varname) +{ + modalfatalbox("%s==NULL in terminal.c\n" + "lineno=%d y=%d w=%d h=%d\n" + "count(scrollback=%p)=%d\n" + "count(screen=%p)=%d\n" + "count(alt=%p)=%d alt_sblines=%d\n" + "whichtree=%p treeindex=%d\n" + "commitid=%s\n\n" + "Please contact <putty@projects.tartarus.org> " + "and pass on the above information.", + varname, lineno, y, term->cols, term->rows, + term->scrollback, count234(term->scrollback), + term->screen, count234(term->screen), + term->alt_screen, count234(term->alt_screen), + term->alt_sblines, whichtree, treeindex, commitid); +} + +/* + * Retrieve a line of the screen or of the scrollback, according to + * whether the y coordinate is non-negative or negative + * (respectively). + */ +static termline *lineptr(Terminal *term, int y, int lineno, int screen) +{ + termline *line; + tree234 *whichtree; + int treeindex; + + if (y >= 0) { + whichtree = term->screen; + treeindex = y; + } else { + int altlines = 0; + + assert(!screen); + + if (term->erase_to_scrollback && + term->alt_which && term->alt_screen) { + altlines = term->alt_sblines; + } + if (y < -altlines) { + whichtree = term->scrollback; + treeindex = y + altlines + count234(term->scrollback); + } else { + whichtree = term->alt_screen; + treeindex = y + term->alt_sblines; + /* treeindex = y + count234(term->alt_screen); */ + } + } + if (whichtree == term->scrollback) { + compressed_scrollback_line *cline = index234(whichtree, treeindex); + if (!cline) + null_line_error(term, y, lineno, whichtree, treeindex, "cline"); + line = decompressline(cline); + } else { + line = index234(whichtree, treeindex); + } + + /* We assume that we don't screw up and retrieve something out of range. */ + if (line == NULL) + null_line_error(term, y, lineno, whichtree, treeindex, "line"); + assert(line != NULL); + + /* + * Here we resize lines to _at least_ the right length, but we + * don't truncate them. Truncation is done as a side effect of + * modifying the line. + * + * The point of this policy is to try to arrange that resizing the + * terminal window repeatedly - e.g. successive steps in an X11 + * opaque window-resize drag, or resizing as a side effect of + * retiling by tiling WMs such as xmonad - does not throw away + * data gratuitously. Specifically, we want a sequence of resize + * operations with no terminal output between them to have the + * same effect as a single resize to the ultimate terminal size, + * and also (for the case in which xmonad narrows a window that's + * scrolling things) we want scrolling up new text at the bottom + * of a narrowed window to avoid truncating lines further up when + * the window is re-widened. + */ + if (term->cols > line->cols) + resizeline(term, line, term->cols); + + return line; +} + +#define lineptr(x) (lineptr)(term,x,__LINE__,0) +#define scrlineptr(x) (lineptr)(term,x,__LINE__,1) + +/* + * Coerce a termline to the terminal's current width. Unlike the + * optional resize in lineptr() above, this is potentially destructive + * of text, since it can shrink as well as grow the line. + * + * We call this whenever a termline is actually going to be modified. + * Helpfully, putting a single call to this function in check_boundary + * deals with _nearly_ all such cases, leaving only a few things like + * bulk erase and ESC#8 to handle separately. + */ +static void check_line_size(Terminal *term, termline *line) +{ + if (term->cols != line->cols) /* trivial optimisation */ + resizeline(term, line, term->cols); +} + +static void term_schedule_tblink(Terminal *term); +static void term_schedule_cblink(Terminal *term); +static void term_update_callback(void *ctx); + +static void term_timer(void *ctx, unsigned long now) +{ + Terminal *term = (Terminal *)ctx; + + if (term->tblink_pending && now == term->next_tblink) { + term->tblinker = !term->tblinker; + term->tblink_pending = false; + term_schedule_tblink(term); + term->window_update_pending = true; + } + + if (term->cblink_pending && now == term->next_cblink) { + term->cblinker = !term->cblinker; + term->cblink_pending = false; + term_schedule_cblink(term); + term->window_update_pending = true; + } + + if (term->in_vbell && now == term->vbell_end) { + term->in_vbell = false; + term->window_update_pending = true; + } + + if (term->window_update_cooldown && + now == term->window_update_cooldown_end) { + term->window_update_cooldown = false; + } + + if (term->window_update_pending) + term_update_callback(term); +} + +static void term_update_callback(void *ctx) +{ + Terminal *term = (Terminal *)ctx; + if (!term->window_update_pending) + return; + if (!term->window_update_cooldown) { + term_update(term); + term->window_update_cooldown = true; + term->window_update_cooldown_end = schedule_timer( + UPDATE_DELAY, term_timer, term); + } +} + +static void term_schedule_update(Terminal *term) +{ + if (!term->window_update_pending) { + term->window_update_pending = true; + queue_toplevel_callback(term_update_callback, term); + } +} + +/* + * Call this whenever the terminal window state changes, to queue + * an update. + */ +static void seen_disp_event(Terminal *term) +{ + term->seen_disp_event = true; /* for scrollback-reset-on-activity */ + term_schedule_update(term); +} + +/* + * Call when the terminal's blinking-text settings change, or when + * a text blink has just occurred. + */ +static void term_schedule_tblink(Terminal *term) +{ + if (term->blink_is_real) { + if (!term->tblink_pending) + term->next_tblink = schedule_timer(TBLINK_DELAY, term_timer, term); + term->tblink_pending = true; + } else { + term->tblinker = true; /* reset when not in use */ + term->tblink_pending = false; + } +} + +/* + * Likewise with cursor blinks. + */ +static void term_schedule_cblink(Terminal *term) +{ + if (term->blink_cur && term->has_focus) { + if (!term->cblink_pending) + term->next_cblink = schedule_timer(CBLINK_DELAY, term_timer, term); + term->cblink_pending = true; + } else { + term->cblinker = true; /* reset when not in use */ + term->cblink_pending = false; + } +} + +/* + * Call to reset cursor blinking on new output. + */ +static void term_reset_cblink(Terminal *term) +{ + seen_disp_event(term); + term->cblinker = true; + term->cblink_pending = false; + term_schedule_cblink(term); +} + +/* + * Call to begin a visual bell. + */ +static void term_schedule_vbell(Terminal *term, bool already_started, + long startpoint) +{ + long ticks_already_gone; + + if (already_started) + ticks_already_gone = GETTICKCOUNT() - startpoint; + else + ticks_already_gone = 0; + + if (ticks_already_gone < VBELL_DELAY) { + term->in_vbell = true; + term->vbell_end = schedule_timer(VBELL_DELAY - ticks_already_gone, + term_timer, term); + } else { + term->in_vbell = false; + } +} + +/* + * Set up power-on settings for the terminal. + * If 'clear' is false, don't actually clear the primary screen, and + * position the cursor below the last non-blank line (scrolling if + * necessary). + */ +static void power_on(Terminal *term, bool clear) +{ + term->alt_x = term->alt_y = 0; + term->savecurs.x = term->savecurs.y = 0; + term->alt_savecurs.x = term->alt_savecurs.y = 0; + term->alt_t = term->marg_t = 0; + if (term->rows != -1) + term->alt_b = term->marg_b = term->rows - 1; + else + term->alt_b = term->marg_b = 0; + if (term->cols != -1) { + int i; + for (i = 0; i < term->cols; i++) + term->tabs[i] = (i % 8 == 0 ? true : false); + } + term->alt_om = term->dec_om = conf_get_bool(term->conf, CONF_dec_om); + term->alt_ins = false; + term->insert = false; + term->alt_wnext = false; + term->wrapnext = false; + term->save_wnext = false; + term->alt_save_wnext = false; + term->alt_wrap = term->wrap = conf_get_bool(term->conf, CONF_wrap_mode); + term->alt_cset = term->cset = term->save_cset = term->alt_save_cset = 0; + term->alt_utf = false; + term->utf = false; + term->save_utf = false; + term->alt_save_utf = false; + term->utf8.state = 0; + term->alt_sco_acs = term->sco_acs = + term->save_sco_acs = term->alt_save_sco_acs = 0; + term->cset_attr[0] = term->cset_attr[1] = + term->save_csattr = term->alt_save_csattr = CSET_ASCII; + term->rvideo = false; + term->in_vbell = false; + term->cursor_on = true; + term->big_cursor = false; + term->default_attr = term->save_attr = + term->alt_save_attr = term->curr_attr = ATTR_DEFAULT; + term->curr_truecolour.fg = term->curr_truecolour.bg = optionalrgb_none; + term->save_truecolour = term->alt_save_truecolour = term->curr_truecolour; + term->app_cursor_keys = conf_get_bool(term->conf, CONF_app_cursor); + term->app_keypad_keys = conf_get_bool(term->conf, CONF_app_keypad); + term->use_bce = conf_get_bool(term->conf, CONF_bce); + term->blink_is_real = conf_get_bool(term->conf, CONF_blinktext); + term->erase_char = term->basic_erase_char; + term->alt_which = 0; + term_print_finish(term); + term->xterm_mouse = 0; + term->xterm_extended_mouse = false; + term->urxvt_extended_mouse = false; + win_set_raw_mouse_mode(term->win, false); + term->win_pointer_shape_pending = true; + term->win_pointer_shape_raw = false; + term->bracketed_paste = false; + term->srm_echo = false; + { + int i; + for (i = 0; i < 256; i++) + term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i); + } + if (term->screen) { + swap_screen(term, 1, false, false); + erase_lots(term, false, true, true); + swap_screen(term, 0, false, false); + if (clear) + erase_lots(term, false, true, true); + term->curs.y = find_last_nonempty_line(term, term->screen) + 1; + if (term->curs.y == term->rows) { + term->curs.y--; + scroll(term, 0, term->rows - 1, 1, true); + } + } else { + term->curs.y = 0; + } + term->curs.x = 0; + term_schedule_tblink(term); + term_schedule_cblink(term); + term_schedule_update(term); +} + +/* + * Force a screen update. + */ +void term_update(Terminal *term) +{ + term->window_update_pending = false; + + if (term->win_move_pending) { + win_move(term->win, term->win_move_pending_x, + term->win_move_pending_y); + term->win_move_pending = false; + } + if (term->win_resize_pending) { + win_request_resize(term->win, term->win_resize_pending_w, + term->win_resize_pending_h); + term->win_resize_pending = false; + } + if (term->win_zorder_pending) { + win_set_zorder(term->win, term->win_zorder_top); + term->win_zorder_pending = false; + } + if (term->win_minimise_pending) { + win_set_minimised(term->win, term->win_minimise_enable); + term->win_minimise_pending = false; + } + if (term->win_maximise_pending) { + win_set_maximised(term->win, term->win_maximise_enable); + term->win_maximise_pending = false; + } + if (term->win_title_pending) { + win_set_title(term->win, term->window_title); + term->win_title_pending = false; + } + if (term->win_icon_title_pending) { + win_set_icon_title(term->win, term->icon_title); + term->win_icon_title_pending = false; + } + if (term->win_pointer_shape_pending) { + win_set_raw_mouse_mode_pointer(term->win, term->win_pointer_shape_raw); + term->win_pointer_shape_pending = false; + } + if (term->win_refresh_pending) { + win_refresh(term->win); + term->win_refresh_pending = false; + } + if (term->win_palette_pending) { + unsigned start = term->win_palette_pending_min; + unsigned ncolours = term->win_palette_pending_limit - start; + win_palette_set(term->win, start, ncolours, term->palette + start); + term->win_palette_pending = false; + } + + if (win_setup_draw_ctx(term->win)) { + bool need_sbar_update = term->seen_disp_event || + term->win_scrollbar_update_pending; + term->win_scrollbar_update_pending = false; + if (term->seen_disp_event && term->scroll_on_disp) { + term->disptop = 0; /* return to main screen */ + term->seen_disp_event = false; + need_sbar_update = true; + } + + if (need_sbar_update) + update_sbar(term); + do_paint(term); + win_set_cursor_pos( + term->win, term->curs.x, term->curs.y - term->disptop); + win_free_draw_ctx(term->win); + } +} + +/* + * Called from front end when a keypress occurs, to trigger + * anything magical that needs to happen in that situation. + */ +void term_seen_key_event(Terminal *term) +{ + /* + * On any keypress, clear the bell overload mechanism + * completely, on the grounds that large numbers of + * beeps coming from deliberate key action are likely + * to be intended (e.g. beeps from filename completion + * blocking repeatedly). + */ + term->beep_overloaded = false; + while (term->beephead) { + struct beeptime *tmp = term->beephead; + term->beephead = tmp->next; + sfree(tmp); + } + term->beeptail = NULL; + term->nbeeps = 0; + + /* + * Reset the scrollback on keypress, if we're doing that. + */ + if (term->scroll_on_key) { + term->disptop = 0; /* return to main screen */ + seen_disp_event(term); + } +} + +/* + * Same as power_on(), but an external function. + */ +void term_pwron(Terminal *term, bool clear) +{ + power_on(term, clear); + if (term->ldisc) /* cause ldisc to notice changes */ + ldisc_echoedit_update(term->ldisc); + term->disptop = 0; + deselect(term); + term_update(term); +} + +static void set_erase_char(Terminal *term) +{ + term->erase_char = term->basic_erase_char; + if (term->use_bce) { + term->erase_char.attr = (term->curr_attr & + (ATTR_FGMASK | ATTR_BGMASK)); + term->erase_char.truecolour.bg = term->curr_truecolour.bg; + } +} + +/* + * We copy a bunch of stuff out of the Conf structure into local + * fields in the Terminal structure, to avoid the repeated tree234 + * lookups which would be involved in fetching them from the former + * every time. + */ +void term_copy_stuff_from_conf(Terminal *term) +{ + term->ansi_colour = conf_get_bool(term->conf, CONF_ansi_colour); + term->no_arabicshaping = conf_get_bool(term->conf, CONF_no_arabicshaping); + term->beep = conf_get_int(term->conf, CONF_beep); + term->bellovl = conf_get_bool(term->conf, CONF_bellovl); + term->bellovl_n = conf_get_int(term->conf, CONF_bellovl_n); + term->bellovl_s = conf_get_int(term->conf, CONF_bellovl_s); + term->bellovl_t = conf_get_int(term->conf, CONF_bellovl_t); + term->no_bidi = conf_get_bool(term->conf, CONF_no_bidi); + term->bksp_is_delete = conf_get_bool(term->conf, CONF_bksp_is_delete); + term->blink_cur = conf_get_bool(term->conf, CONF_blink_cur); + term->blinktext = conf_get_bool(term->conf, CONF_blinktext); + term->cjk_ambig_wide = conf_get_bool(term->conf, CONF_cjk_ambig_wide); + term->conf_height = conf_get_int(term->conf, CONF_height); + term->conf_width = conf_get_int(term->conf, CONF_width); + term->crhaslf = conf_get_bool(term->conf, CONF_crhaslf); + term->erase_to_scrollback = conf_get_bool(term->conf, CONF_erase_to_scrollback); + term->funky_type = conf_get_int(term->conf, CONF_funky_type); + term->lfhascr = conf_get_bool(term->conf, CONF_lfhascr); + term->logflush = conf_get_bool(term->conf, CONF_logflush); + term->logtype = conf_get_int(term->conf, CONF_logtype); + term->mouse_override = conf_get_bool(term->conf, CONF_mouse_override); + term->nethack_keypad = conf_get_bool(term->conf, CONF_nethack_keypad); + term->no_alt_screen = conf_get_bool(term->conf, CONF_no_alt_screen); + term->no_applic_c = conf_get_bool(term->conf, CONF_no_applic_c); + term->no_applic_k = conf_get_bool(term->conf, CONF_no_applic_k); + term->no_dbackspace = conf_get_bool(term->conf, CONF_no_dbackspace); + term->no_mouse_rep = conf_get_bool(term->conf, CONF_no_mouse_rep); + term->no_remote_charset = conf_get_bool(term->conf, CONF_no_remote_charset); + term->no_remote_resize = conf_get_bool(term->conf, CONF_no_remote_resize); + term->no_remote_wintitle = conf_get_bool(term->conf, CONF_no_remote_wintitle); + term->no_remote_clearscroll = conf_get_bool(term->conf, CONF_no_remote_clearscroll); + term->rawcnp = conf_get_bool(term->conf, CONF_rawcnp); + term->utf8linedraw = conf_get_bool(term->conf, CONF_utf8linedraw); + term->rect_select = conf_get_bool(term->conf, CONF_rect_select); + term->remote_qtitle_action = conf_get_int(term->conf, CONF_remote_qtitle_action); + term->rxvt_homeend = conf_get_bool(term->conf, CONF_rxvt_homeend); + term->scroll_on_disp = conf_get_bool(term->conf, CONF_scroll_on_disp); + term->scroll_on_key = conf_get_bool(term->conf, CONF_scroll_on_key); + term->xterm_mouse_forbidden = conf_get_bool(term->conf, CONF_no_mouse_rep); + term->xterm_256_colour = conf_get_bool(term->conf, CONF_xterm_256_colour); + term->true_colour = conf_get_bool(term->conf, CONF_true_colour); + + /* + * Parse the control-character escapes in the configured + * answerback string. + */ + { + char *answerback = conf_get_str(term->conf, CONF_answerback); + int maxlen = strlen(answerback); + + term->answerback = snewn(maxlen, char); + term->answerbacklen = 0; + + while (*answerback) { + char *n; + char c = ctrlparse(answerback, &n); + if (n) { + term->answerback[term->answerbacklen++] = c; + answerback = n; + } else { + term->answerback[term->answerbacklen++] = *answerback++; + } + } + } +} + +void term_pre_reconfig(Terminal *term, Conf *conf) +{ + + /* + * Copy the current window title into the stored previous + * configuration, so that doing nothing to the window title field + * in the config box doesn't reset the title to its startup state. + */ + conf_set_str(conf, CONF_wintitle, term->window_title); +} + +/* + * When the user reconfigures us, we need to check the forbidden- + * alternate-screen config option, disable raw mouse mode if the + * user has disabled mouse reporting, and abandon a print job if + * the user has disabled printing. + */ +void term_reconfig(Terminal *term, Conf *conf) +{ + /* + * Before adopting the new config, check all those terminal + * settings which control power-on defaults; and if they've + * changed, we will modify the current state as well as the + * default one. The full list is: Auto wrap mode, DEC Origin + * Mode, BCE, blinking text, character classes. + */ + bool reset_wrap, reset_decom, reset_bce, reset_tblink, reset_charclass; + bool palette_changed = false; + int i; + + reset_wrap = (conf_get_bool(term->conf, CONF_wrap_mode) != + conf_get_bool(conf, CONF_wrap_mode)); + reset_decom = (conf_get_bool(term->conf, CONF_dec_om) != + conf_get_bool(conf, CONF_dec_om)); + reset_bce = (conf_get_bool(term->conf, CONF_bce) != + conf_get_bool(conf, CONF_bce)); + reset_tblink = (conf_get_bool(term->conf, CONF_blinktext) != + conf_get_bool(conf, CONF_blinktext)); + reset_charclass = false; + for (i = 0; i < 256; i++) + if (conf_get_int_int(term->conf, CONF_wordness, i) != + conf_get_int_int(conf, CONF_wordness, i)) + reset_charclass = true; + + /* + * If the bidi or shaping settings have changed, flush the bidi + * cache completely. + */ + if (conf_get_bool(term->conf, CONF_no_arabicshaping) != + conf_get_bool(conf, CONF_no_arabicshaping) || + conf_get_bool(term->conf, CONF_no_bidi) != + conf_get_bool(conf, CONF_no_bidi)) { + for (i = 0; i < term->bidi_cache_size; i++) { + sfree(term->pre_bidi_cache[i].chars); + sfree(term->post_bidi_cache[i].chars); + term->pre_bidi_cache[i].width = -1; + term->pre_bidi_cache[i].chars = NULL; + term->post_bidi_cache[i].width = -1; + term->post_bidi_cache[i].chars = NULL; + } + } + + { + const char *old_title = conf_get_str(term->conf, CONF_wintitle); + const char *new_title = conf_get_str(conf, CONF_wintitle); + if (strcmp(old_title, new_title)) { + sfree(term->window_title); + term->window_title = dupstr(new_title); + term->win_title_pending = true; + term_schedule_update(term); + } + } + + /* + * Just setting conf is sufficient to cause colour setting changes + * to appear on the next ESC]R palette reset. But we should also + * check whether any colour settings have been changed, so that + * they can be updated immediately if they haven't been overridden + * by some escape sequence. + */ + { + int i, j; + for (i = 0; i < CONF_NCOLOURS; i++) { + for (j = 0; j < 3; j++) + if (conf_get_int_int(term->conf, CONF_colours, i*3+j) != + conf_get_int_int(conf, CONF_colours, i*3+j)) + break; + if (j < 3) { + /* Actually enacting the change has to be deferred + * until the new conf is installed. */ + palette_changed = true; + break; + } + } + } + + conf_free(term->conf); + term->conf = conf_copy(conf); + + if (reset_wrap) + term->alt_wrap = term->wrap = conf_get_bool(term->conf, CONF_wrap_mode); + if (reset_decom) + term->alt_om = term->dec_om = conf_get_bool(term->conf, CONF_dec_om); + if (reset_bce) { + term->use_bce = conf_get_bool(term->conf, CONF_bce); + set_erase_char(term); + } + if (reset_tblink) { + term->blink_is_real = conf_get_bool(term->conf, CONF_blinktext); + } + if (reset_charclass) + for (i = 0; i < 256; i++) + term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i); + + if (conf_get_bool(term->conf, CONF_no_alt_screen)) + swap_screen(term, 0, false, false); + if (conf_get_bool(term->conf, CONF_no_remote_charset)) { + term->cset_attr[0] = term->cset_attr[1] = CSET_ASCII; + term->sco_acs = term->alt_sco_acs = 0; + term->utf = false; + } + if (!conf_get_str(term->conf, CONF_printer)) { + term_print_finish(term); + } + if (palette_changed) + term_notify_palette_changed(term); + term_schedule_tblink(term); + term_schedule_cblink(term); + term_copy_stuff_from_conf(term); + term_update_raw_mouse_mode(term); +} + +/* + * Clear the scrollback. + */ +void term_clrsb(Terminal *term) +{ + unsigned char *line; + int i; + + /* + * Scroll forward to the current screen, if we were back in the + * scrollback somewhere until now. + */ + term->disptop = 0; + + /* + * Clear the actual scrollback. + */ + while ((line = delpos234(term->scrollback, 0)) != NULL) { + sfree(line); /* this is compressed data, not a termline */ + } + + /* + * When clearing the scrollback, we also truncate any termlines on + * the current screen which have remembered data from a previous + * larger window size. Rationale: clearing the scrollback is + * sometimes done to protect privacy, so the user intention is + * specifically that we should not retain evidence of what + * previously happened in the terminal, and that ought to include + * evidence to the right as well as evidence above. + */ + for (i = 0; i < term->rows; i++) + check_line_size(term, scrlineptr(i)); + + /* + * That operation has invalidated the selection, if it overlapped + * the scrollback at all. + */ + if (term->selstate != NO_SELECTION && term->selstart.y < 0) + deselect(term); + + /* + * There are now no lines of real scrollback which can be pulled + * back into the screen by a resize, and no lines of the alternate + * screen which should be displayed as if part of the scrollback. + */ + term->tempsblines = 0; + term->alt_sblines = 0; + + /* + * The scrollbar will need updating to reflect the new state of + * the world. + */ + term->win_scrollbar_update_pending = true; + term_schedule_update(term); +} + +const optionalrgb optionalrgb_none = {0, 0, 0, 0}; + +void term_setup_window_titles(Terminal *term, const char *title_hostname) +{ + const char *conf_title = conf_get_str(term->conf, CONF_wintitle); + sfree(term->window_title); + sfree(term->icon_title); + if (*conf_title) { + term->window_title = dupstr(conf_title); + term->icon_title = dupstr(conf_title); + } else { + if (title_hostname && *title_hostname) + term->window_title = dupcat(title_hostname, " - ", appname); + else + term->window_title = dupstr(appname); + term->icon_title = dupstr(term->window_title); + } + term->win_title_pending = true; + term->win_icon_title_pending = true; +} + +static void palette_rebuild(Terminal *term) +{ + unsigned min_changed = OSC4_NCOLOURS, max_changed = 0; + + if (term->win_palette_pending) { + /* Possibly extend existing range. */ + min_changed = term->win_palette_pending_min; + max_changed = term->win_palette_pending_limit - 1; + } else { + /* Start with empty range. */ + min_changed = OSC4_NCOLOURS; + max_changed = 0; + } + + for (unsigned i = 0; i < OSC4_NCOLOURS; i++) { + rgb new_value; + bool found = false; + + for (unsigned j = lenof(term->subpalettes); j-- > 0 ;) { + if (term->subpalettes[j].present[i]) { + new_value = term->subpalettes[j].values[i]; + found = true; + break; + } + } + + assert(found); /* we expect SUBPAL_CONF to always be set */ + + if (new_value.r != term->palette[i].r || + new_value.g != term->palette[i].g || + new_value.b != term->palette[i].b) { + term->palette[i] = new_value; + if (min_changed > i) + min_changed = i; + if (max_changed < i) + max_changed = i; + } + } + + if (min_changed <= max_changed) { + /* + * At least one colour changed (or we had an update scheduled + * already). Schedule a redraw event to pass the result back + * to the TermWin. This also requires invalidating the rest + * of the window, because usually all the text will need + * redrawing in the new colours. + * (If there was an update pending and this palette rebuild + * didn't actually change anything, we'll harmlessly reinforce + * the existing update request.) + */ + term->win_palette_pending = true; + term->win_palette_pending_min = min_changed; + term->win_palette_pending_limit = max_changed + 1; + term_invalidate(term); + } +} + +/* + * Rebuild the palette from configuration and platform colours. + * If 'keep_overrides' set, any escape-sequence-specified overrides will + * remain in place. + */ +static void palette_reset(Terminal *term, bool keep_overrides) +{ + for (unsigned i = 0; i < OSC4_NCOLOURS; i++) + term->subpalettes[SUBPAL_CONF].present[i] = true; + + /* + * Copy all the palette information out of the Conf. + */ + for (unsigned i = 0; i < CONF_NCOLOURS; i++) { + rgb *col = &term->subpalettes[SUBPAL_CONF].values[ + colour_indices_conf_to_osc4[i]]; + col->r = conf_get_int_int(term->conf, CONF_colours, i*3+0); + col->g = conf_get_int_int(term->conf, CONF_colours, i*3+1); + col->b = conf_get_int_int(term->conf, CONF_colours, i*3+2); + } + + /* + * Directly invent the rest of the xterm-256 colours. + */ + for (unsigned i = 0; i < 216; i++) { + rgb *col = &term->subpalettes[SUBPAL_CONF].values[i + 16]; + int r = i / 36, g = (i / 6) % 6, b = i % 6; + col->r = r ? r * 40 + 55 : 0; + col->g = g ? g * 40 + 55 : 0; + col->b = b ? b * 40 + 55 : 0; + } + for (unsigned i = 0; i < 24; i++) { + rgb *col = &term->subpalettes[SUBPAL_CONF].values[i + 232]; + int shade = i * 10 + 8; + col->r = col->g = col->b = shade; + } + + /* + * Re-fetch any OS-local overrides. + */ + for (unsigned i = 0; i < OSC4_NCOLOURS; i++) + term->subpalettes[SUBPAL_PLATFORM].present[i] = false; + win_palette_get_overrides(term->win, term); + + if (!keep_overrides) { + /* + * Get rid of all escape-sequence configuration. + */ + for (unsigned i = 0; i < OSC4_NCOLOURS; i++) + term->subpalettes[SUBPAL_SESSION].present[i] = false; + } + + /* + * Rebuild the composite palette. + */ + palette_rebuild(term); +} + +void term_palette_override(Terminal *term, unsigned osc4_index, rgb rgb) +{ + /* + * We never expect to be called except as re-entry from our own + * call to win_palette_get_overrides above, so we need not mess + * about calling palette_rebuild. + */ + term->subpalettes[SUBPAL_PLATFORM].present[osc4_index] = true; + term->subpalettes[SUBPAL_PLATFORM].values[osc4_index] = rgb; +} + +/* + * Initialise the terminal. + */ +Terminal *term_init(Conf *myconf, struct unicode_data *ucsdata, TermWin *win) +{ + Terminal *term; + + /* + * Allocate a new Terminal structure and initialise the fields + * that need it. + */ + term = snew(Terminal); + term->win = win; + term->ucsdata = ucsdata; + term->conf = conf_copy(myconf); + term->logctx = NULL; + term->compatibility_level = TM_PUTTY; + strcpy(term->id_string, "\033[?6c"); + term->cblink_pending = term->tblink_pending = false; + term->paste_buffer = NULL; + term->paste_len = 0; + bufchain_init(&term->inbuf); + bufchain_init(&term->printer_buf); + term->printing = term->only_printing = false; + term->print_job = NULL; + term->vt52_mode = false; + term->cr_lf_return = false; + term->seen_disp_event = false; + term->mouse_is_down = 0; + term->reset_132 = false; + term->cblinker = false; + term->tblinker = false; + term->has_focus = true; + term->repeat_off = false; + term->termstate = TOPLEVEL; + term->selstate = NO_SELECTION; + term->curstype = 0; + + term_copy_stuff_from_conf(term); + + term->screen = term->alt_screen = term->scrollback = NULL; + term->tempsblines = 0; + term->alt_sblines = 0; + term->disptop = 0; + term->disptext = NULL; + term->dispcursx = term->dispcursy = -1; + term->tabs = NULL; + deselect(term); + term->rows = term->cols = -1; + power_on(term, true); + term->beephead = term->beeptail = NULL; + term->nbeeps = 0; + term->lastbeep = false; + term->beep_overloaded = false; + term->attr_mask = 0xffffffff; + term->backend = NULL; + term->in_term_out = false; + term->ltemp = NULL; + term->ltemp_size = 0; + term->wcFrom = NULL; + term->wcTo = NULL; + term->wcFromTo_size = 0; + + term->window_update_pending = false; + term->window_update_cooldown = false; + + term->bidi_cache_size = 0; + term->pre_bidi_cache = term->post_bidi_cache = NULL; + + /* FULL-TERMCHAR */ + term->basic_erase_char.chr = CSET_ASCII | ' '; + term->basic_erase_char.attr = ATTR_DEFAULT; + term->basic_erase_char.cc_next = 0; + term->basic_erase_char.truecolour.fg = optionalrgb_none; + term->basic_erase_char.truecolour.bg = optionalrgb_none; + term->erase_char = term->basic_erase_char; + + term->last_selected_text = NULL; + term->last_selected_attr = NULL; + term->last_selected_tc = NULL; + term->last_selected_len = 0; + /* TermWin implementations will typically extend these with + * clipboard ids they know about */ + term->mouse_select_clipboards[0] = CLIP_LOCAL; + term->n_mouse_select_clipboards = 1; + term->mouse_paste_clipboard = CLIP_NULL; + + term->last_graphic_char = 0; + + term->trusted = true; + + term->bracketed_paste_active = false; + + term->window_title = dupstr(""); + term->icon_title = dupstr(""); + term->minimised = false; + term->winpos_x = term->winpos_y = 0; + term->winpixsize_x = term->winpixsize_y = 0; + + term->win_move_pending = false; + term->win_resize_pending = false; + term->win_zorder_pending = false; + term->win_minimise_pending = false; + term->win_maximise_pending = false; + term->win_title_pending = false; + term->win_icon_title_pending = false; + term->win_pointer_shape_pending = false; + term->win_refresh_pending = false; + term->win_scrollbar_update_pending = false; + term->win_palette_pending = false; + + palette_reset(term, false); + + return term; +} + +void term_free(Terminal *term) +{ + termline *line; + struct beeptime *beep; + int i; + + while ((line = delpos234(term->scrollback, 0)) != NULL) + sfree(line); /* compressed data, not a termline */ + freetree234(term->scrollback); + while ((line = delpos234(term->screen, 0)) != NULL) + freetermline(line); + freetree234(term->screen); + while ((line = delpos234(term->alt_screen, 0)) != NULL) + freetermline(line); + freetree234(term->alt_screen); + if (term->disptext) { + for (i = 0; i < term->rows; i++) + freetermline(term->disptext[i]); + } + sfree(term->disptext); + while (term->beephead) { + beep = term->beephead; + term->beephead = beep->next; + sfree(beep); + } + bufchain_clear(&term->inbuf); + if(term->print_job) + printer_finish_job(term->print_job); + bufchain_clear(&term->printer_buf); + sfree(term->paste_buffer); + sfree(term->ltemp); + sfree(term->wcFrom); + sfree(term->wcTo); + sfree(term->answerback); + + for (i = 0; i < term->bidi_cache_size; i++) { + sfree(term->pre_bidi_cache[i].chars); + sfree(term->post_bidi_cache[i].chars); + sfree(term->post_bidi_cache[i].forward); + sfree(term->post_bidi_cache[i].backward); + } + sfree(term->pre_bidi_cache); + sfree(term->post_bidi_cache); + + sfree(term->tabs); + + expire_timer_context(term); + delete_callbacks_for_context(term); + + conf_free(term->conf); + + sfree(term->window_title); + sfree(term->icon_title); + + sfree(term); +} + +void term_set_trust_status(Terminal *term, bool trusted) +{ + term->trusted = trusted; +} + +void term_get_cursor_position(Terminal *term, int *x, int *y) +{ + *x = term->curs.x; + *y = term->curs.y; +} + +/* + * Set up the terminal for a given size. + */ +void term_size(Terminal *term, int newrows, int newcols, int newsavelines) +{ + tree234 *newalt; + termline **newdisp, *line; + int i, j, oldrows = term->rows; + int sblen; + int save_alt_which = term->alt_which; + + if (newrows == term->rows && newcols == term->cols && + newsavelines == term->savelines) + return; /* nothing to do */ + + /* Behave sensibly if we're given zero (or negative) rows/cols */ + + if (newrows < 1) newrows = 1; + if (newcols < 1) newcols = 1; + + deselect(term); + swap_screen(term, 0, false, false); + + term->alt_t = term->marg_t = 0; + term->alt_b = term->marg_b = newrows - 1; + + if (term->rows == -1) { + term->scrollback = newtree234(NULL); + term->screen = newtree234(NULL); + term->tempsblines = 0; + term->rows = 0; + } + + /* + * Resize the screen and scrollback. We only need to shift + * lines around within our data structures, because lineptr() + * will take care of resizing each individual line if + * necessary. So: + * + * - If the new screen is longer, we shunt lines in from temporary + * scrollback if possible, otherwise we add new blank lines at + * the bottom. + * + * - If the new screen is shorter, we remove any blank lines at + * the bottom if possible, otherwise shunt lines above the cursor + * to scrollback if possible, otherwise delete lines below the + * cursor. + * + * - Then, if the new scrollback length is less than the + * amount of scrollback we actually have, we must throw some + * away. + */ + sblen = count234(term->scrollback); + /* Do this loop to expand the screen if newrows > rows */ + assert(term->rows == count234(term->screen)); + while (term->rows < newrows) { + if (term->tempsblines > 0) { + compressed_scrollback_line *cline; + /* Insert a line from the scrollback at the top of the screen. */ + assert(sblen >= term->tempsblines); + cline = delpos234(term->scrollback, --sblen); + line = decompressline(cline); + sfree(cline); + line->temporary = false; /* reconstituted line is now real */ + term->tempsblines -= 1; + addpos234(term->screen, line, 0); + term->curs.y += 1; + term->savecurs.y += 1; + term->alt_y += 1; + term->alt_savecurs.y += 1; + } else { + /* Add a new blank line at the bottom of the screen. */ + line = newtermline(term, newcols, false); + addpos234(term->screen, line, count234(term->screen)); + } + term->rows += 1; + } + /* Do this loop to shrink the screen if newrows < rows */ + while (term->rows > newrows) { + if (term->curs.y < term->rows - 1) { + /* delete bottom row, unless it contains the cursor */ + line = delpos234(term->screen, term->rows - 1); + freetermline(line); + } else { + /* push top row to scrollback */ + line = delpos234(term->screen, 0); + addpos234(term->scrollback, compressline(line), sblen++); + freetermline(line); + term->tempsblines += 1; + term->curs.y -= 1; + term->savecurs.y -= 1; + term->alt_y -= 1; + term->alt_savecurs.y -= 1; + } + term->rows -= 1; + } + assert(term->rows == newrows); + assert(count234(term->screen) == newrows); + + /* Delete any excess lines from the scrollback. */ + while (sblen > newsavelines) { + line = delpos234(term->scrollback, 0); + sfree(line); + sblen--; + } + if (sblen < term->tempsblines) + term->tempsblines = sblen; + assert(count234(term->scrollback) <= newsavelines); + assert(count234(term->scrollback) >= term->tempsblines); + term->disptop = 0; + + /* Make a new displayed text buffer. */ + newdisp = snewn(newrows, termline *); + for (i = 0; i < newrows; i++) { + newdisp[i] = newtermline(term, newcols, false); + for (j = 0; j < newcols; j++) + newdisp[i]->chars[j].attr = ATTR_INVALID; + } + if (term->disptext) { + for (i = 0; i < oldrows; i++) + freetermline(term->disptext[i]); + } + sfree(term->disptext); + term->disptext = newdisp; + term->dispcursx = term->dispcursy = -1; + + /* Make a new alternate screen. */ + newalt = newtree234(NULL); + for (i = 0; i < newrows; i++) { + line = newtermline(term, newcols, true); + addpos234(newalt, line, i); + } + if (term->alt_screen) { + while (NULL != (line = delpos234(term->alt_screen, 0))) + freetermline(line); + freetree234(term->alt_screen); + } + term->alt_screen = newalt; + term->alt_sblines = 0; + + term->tabs = sresize(term->tabs, newcols, unsigned char); + { + int i; + for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++) + term->tabs[i] = (i % 8 == 0 ? true : false); + } + + /* Check that the cursor positions are still valid. */ + if (term->savecurs.y < 0) + term->savecurs.y = 0; + if (term->savecurs.y >= newrows) + term->savecurs.y = newrows - 1; + if (term->savecurs.x >= newcols) + term->savecurs.x = newcols - 1; + if (term->alt_savecurs.y < 0) + term->alt_savecurs.y = 0; + if (term->alt_savecurs.y >= newrows) + term->alt_savecurs.y = newrows - 1; + if (term->alt_savecurs.x >= newcols) + term->alt_savecurs.x = newcols - 1; + if (term->curs.y < 0) + term->curs.y = 0; + if (term->curs.y >= newrows) + term->curs.y = newrows - 1; + if (term->curs.x >= newcols) + term->curs.x = newcols - 1; + if (term->alt_y < 0) + term->alt_y = 0; + if (term->alt_y >= newrows) + term->alt_y = newrows - 1; + if (term->alt_x >= newcols) + term->alt_x = newcols - 1; + term->alt_x = term->alt_y = 0; + term->wrapnext = false; + term->alt_wnext = false; + + term->rows = newrows; + term->cols = newcols; + term->savelines = newsavelines; + + swap_screen(term, save_alt_which, false, false); + + term->win_scrollbar_update_pending = true; + term_schedule_update(term); + if (term->backend) + backend_size(term->backend, term->cols, term->rows); +} + +/* + * Hand a backend to the terminal, so it can be notified of resizes. + */ +void term_provide_backend(Terminal *term, Backend *backend) +{ + term->backend = backend; + if (term->backend && term->cols > 0 && term->rows > 0) + backend_size(term->backend, term->cols, term->rows); +} + +/* Find the bottom line on the screen that has any content. + * If only the top line has content, returns 0. + * If no lines have content, return -1. + */ +static int find_last_nonempty_line(Terminal * term, tree234 * screen) +{ + int i; + for (i = count234(screen) - 1; i >= 0; i--) { + termline *line = index234(screen, i); + int j; + for (j = 0; j < line->cols; j++) + if (!termchars_equal(&line->chars[j], &term->erase_char)) + break; + if (j != line->cols) break; + } + return i; +} + +/* + * Swap screens. If `reset' is true and we have been asked to + * switch to the alternate screen, we must bring most of its + * configuration from the main screen and erase the contents of the + * alternate screen completely. (This is even true if we're already + * on it! Blame xterm.) + */ +static void swap_screen(Terminal *term, int which, + bool reset, bool keep_cur_pos) +{ + int t; + bool bt; + pos tp; + truecolour ttc; + tree234 *ttr; + + if (!which) + reset = false; /* do no weird resetting if which==0 */ + + if (which != term->alt_which) { + if (term->erase_to_scrollback && term->alt_screen && + term->alt_which && term->disptop < 0) { + /* + * We're swapping away from the alternate screen, so some + * lines are about to vanish from the virtual scrollback. + * Adjust disptop by that much, so that (if we're not + * resetting the scrollback anyway on a display event) the + * current scroll position still ends up pointing at the + * same text. + */ + term->disptop += term->alt_sblines; + if (term->disptop > 0) + term->disptop = 0; + } + + term->alt_which = which; + + ttr = term->alt_screen; + term->alt_screen = term->screen; + term->screen = ttr; + term->alt_sblines = ( + term->alt_screen ? + find_last_nonempty_line(term, term->alt_screen) + 1 : 0); + t = term->curs.x; + if (!reset && !keep_cur_pos) + term->curs.x = term->alt_x; + term->alt_x = t; + t = term->curs.y; + if (!reset && !keep_cur_pos) + term->curs.y = term->alt_y; + term->alt_y = t; + t = term->marg_t; + if (!reset) term->marg_t = term->alt_t; + term->alt_t = t; + t = term->marg_b; + if (!reset) term->marg_b = term->alt_b; + term->alt_b = t; + bt = term->dec_om; + if (!reset) term->dec_om = term->alt_om; + term->alt_om = bt; + bt = term->wrap; + if (!reset) term->wrap = term->alt_wrap; + term->alt_wrap = bt; + bt = term->wrapnext; + if (!reset) term->wrapnext = term->alt_wnext; + term->alt_wnext = bt; + bt = term->insert; + if (!reset) term->insert = term->alt_ins; + term->alt_ins = bt; + t = term->cset; + if (!reset) term->cset = term->alt_cset; + term->alt_cset = t; + bt = term->utf; + if (!reset) term->utf = term->alt_utf; + term->alt_utf = bt; + t = term->sco_acs; + if (!reset) term->sco_acs = term->alt_sco_acs; + term->alt_sco_acs = t; + + tp = term->savecurs; + if (!reset) + term->savecurs = term->alt_savecurs; + term->alt_savecurs = tp; + t = term->save_cset; + if (!reset) + term->save_cset = term->alt_save_cset; + term->alt_save_cset = t; + t = term->save_csattr; + if (!reset) + term->save_csattr = term->alt_save_csattr; + term->alt_save_csattr = t; + t = term->save_attr; + if (!reset) + term->save_attr = term->alt_save_attr; + term->alt_save_attr = t; + ttc = term->save_truecolour; + if (!reset) + term->save_truecolour = term->alt_save_truecolour; + term->alt_save_truecolour = ttc; + bt = term->save_utf; + if (!reset) + term->save_utf = term->alt_save_utf; + term->alt_save_utf = bt; + bt = term->save_wnext; + if (!reset) + term->save_wnext = term->alt_save_wnext; + term->alt_save_wnext = bt; + t = term->save_sco_acs; + if (!reset) + term->save_sco_acs = term->alt_save_sco_acs; + term->alt_save_sco_acs = t; + + if (term->erase_to_scrollback && term->alt_screen && + term->alt_which && term->disptop < 0) { + /* + * Inverse of the adjustment at the top of this function. + * This time, we're swapping _to_ the alternate screen, so + * some lines are about to _appear_ in the virtual + * scrollback, and we adjust disptop in the other + * direction. + * + * Both these adjustments depend on the value stored in + * term->alt_sblines while the alt screen is selected, + * which is why we had to do one _before_ switching away + * from it and the other _after_ switching to it. + */ + term->disptop -= term->alt_sblines; + int limit = -sblines(term); + if (term->disptop < limit) + term->disptop = limit; + } + } + + if (reset && term->screen) { + /* + * Yes, this _is_ supposed to honour background-colour-erase. + */ + erase_lots(term, false, true, true); + } +} + +/* + * Update the scroll bar. + */ +static void update_sbar(Terminal *term) +{ + int nscroll = sblines(term); + win_set_scrollbar(term->win, nscroll + term->rows, + nscroll + term->disptop, term->rows); +} + +/* + * Check whether the region bounded by the two pointers intersects + * the scroll region, and de-select the on-screen selection if so. + */ +static void check_selection(Terminal *term, pos from, pos to) +{ + if (poslt(from, term->selend) && poslt(term->selstart, to)) + deselect(term); +} + +static void clear_line(Terminal *term, termline *line) +{ + resizeline(term, line, term->cols); + for (int i = 0; i < term->cols; i++) + copy_termchar(line, i, &term->erase_char); + line->lattr = LATTR_NORM; +} + +static void check_trust_status(Terminal *term, termline *line) +{ + if (line->trusted != term->trusted) { + /* + * If we're displaying trusted output on a previously + * untrusted line, or vice versa, we need to switch the + * 'trusted' attribute on this terminal line, and also clear + * all its previous contents. + */ + clear_line(term, line); + line->trusted = term->trusted; + } +} + +/* + * Scroll the screen. (`lines' is +ve for scrolling forward, -ve + * for backward.) `sb' is true if the scrolling is permitted to + * affect the scrollback buffer. + */ +static void scroll(Terminal *term, int topline, int botline, + int lines, bool sb) +{ + termline *line; + int seltop, scrollwinsize; + + if (topline != 0 || term->alt_which != 0) + sb = false; + + scrollwinsize = botline - topline + 1; + + if (lines < 0) { + lines = -lines; + if (lines > scrollwinsize) + lines = scrollwinsize; + while (lines-- > 0) { + line = delpos234(term->screen, botline); + resizeline(term, line, term->cols); + clear_line(term, line); + addpos234(term->screen, line, topline); + + if (term->selstart.y >= topline && term->selstart.y <= botline) { + term->selstart.y++; + if (term->selstart.y > botline) { + term->selstart.y = botline + 1; + term->selstart.x = 0; + } + } + if (term->selend.y >= topline && term->selend.y <= botline) { + term->selend.y++; + if (term->selend.y > botline) { + term->selend.y = botline + 1; + term->selend.x = 0; + } + } + } + } else { + if (lines > scrollwinsize) + lines = scrollwinsize; + while (lines-- > 0) { + line = delpos234(term->screen, topline); +#ifdef TERM_CC_DIAGS + cc_check(line); +#endif + if (sb && term->savelines > 0) { + int sblen = count234(term->scrollback); + /* + * We must add this line to the scrollback. We'll + * remove a line from the top of the scrollback if + * the scrollback is full. + */ + if (sblen == term->savelines) { + unsigned char *cline; + + sblen--; + cline = delpos234(term->scrollback, 0); + sfree(cline); + } else + term->tempsblines += 1; + + addpos234(term->scrollback, compressline(line), sblen); + + /* now `line' itself can be reused as the bottom line */ + + /* + * If the user is currently looking at part of the + * scrollback, and they haven't enabled any options + * that are going to reset the scrollback as a + * result of this movement, then the chances are + * they'd like to keep looking at the same line. So + * we move their viewpoint at the same rate as the + * scroll, at least until their viewpoint hits the + * top end of the scrollback buffer, at which point + * we don't have the choice any more. + * + * Thanks to Jan Holmen Holsten for the idea and + * initial implementation. + */ + if (term->disptop > -term->savelines && term->disptop < 0) + term->disptop--; + } + resizeline(term, line, term->cols); + clear_line(term, line); + check_trust_status(term, line); + addpos234(term->screen, line, botline); + + /* + * If the selection endpoints move into the scrollback, + * we keep them moving until they hit the top. However, + * of course, if the line _hasn't_ moved into the + * scrollback then we don't do this, and cut them off + * at the top of the scroll region. + * + * This applies to selstart and selend (for an existing + * selection), and also selanchor (for one being + * selected as we speak). + */ + seltop = sb ? -term->savelines : topline; + + if (term->selstate != NO_SELECTION) { + if (term->selstart.y >= seltop && + term->selstart.y <= botline) { + term->selstart.y--; + if (term->selstart.y < seltop) { + term->selstart.y = seltop; + term->selstart.x = 0; + } + } + if (term->selend.y >= seltop && term->selend.y <= botline) { + term->selend.y--; + if (term->selend.y < seltop) { + term->selend.y = seltop; + term->selend.x = 0; + } + } + if (term->selanchor.y >= seltop && + term->selanchor.y <= botline) { + term->selanchor.y--; + if (term->selanchor.y < seltop) { + term->selanchor.y = seltop; + term->selanchor.x = 0; + } + } + } + } + } +} + +/* + * Move the cursor to a given position, clipping at boundaries. We + * may or may not want to clip at the scroll margin: marg_clip is 0 + * not to, 1 to disallow _passing_ the margins, and 2 to disallow + * even _being_ outside the margins. + */ +static void move(Terminal *term, int x, int y, int marg_clip) +{ + if (x < 0) + x = 0; + if (x >= term->cols) + x = term->cols - 1; + if (marg_clip) { + if ((term->curs.y >= term->marg_t || marg_clip == 2) && + y < term->marg_t) + y = term->marg_t; + if ((term->curs.y <= term->marg_b || marg_clip == 2) && + y > term->marg_b) + y = term->marg_b; + } + if (y < 0) + y = 0; + if (y >= term->rows) + y = term->rows - 1; + term->curs.x = x; + term->curs.y = y; + term->wrapnext = false; +} + +/* + * Save or restore the cursor and SGR mode. + */ +static void save_cursor(Terminal *term, bool save) +{ + if (save) { + term->savecurs = term->curs; + term->save_attr = term->curr_attr; + term->save_truecolour = term->curr_truecolour; + term->save_cset = term->cset; + term->save_utf = term->utf; + term->save_wnext = term->wrapnext; + term->save_csattr = term->cset_attr[term->cset]; + term->save_sco_acs = term->sco_acs; + } else { + term->curs = term->savecurs; + /* Make sure the window hasn't shrunk since the save */ + if (term->curs.x >= term->cols) + term->curs.x = term->cols - 1; + if (term->curs.y >= term->rows) + term->curs.y = term->rows - 1; + + term->curr_attr = term->save_attr; + term->curr_truecolour = term->save_truecolour; + term->cset = term->save_cset; + term->utf = term->save_utf; + term->wrapnext = term->save_wnext; + /* + * wrapnext might reset to False if the x position is no + * longer at the rightmost edge. + */ + if (term->wrapnext && term->curs.x < term->cols-1) + term->wrapnext = false; + term->cset_attr[term->cset] = term->save_csattr; + term->sco_acs = term->save_sco_acs; + set_erase_char(term); + } +} + +/* + * This function is called before doing _anything_ which affects + * only part of a line of text. It is used to mark the boundary + * between two character positions, and it indicates that some sort + * of effect is going to happen on only one side of that boundary. + * + * The effect of this function is to check whether a CJK + * double-width character is straddling the boundary, and to remove + * it and replace it with two spaces if so. (Of course, one or + * other of those spaces is then likely to be replaced with + * something else again, as a result of whatever happens next.) + * + * Also, if the boundary is at the right-hand _edge_ of the screen, + * it implies something deliberate is being done to the rightmost + * column position; hence we must clear LATTR_WRAPPED2. + * + * The input to the function is the coordinates of the _second_ + * character of the pair. + */ +static void check_boundary(Terminal *term, int x, int y) +{ + termline *ldata; + + /* Validate input coordinates, just in case. */ + if (x <= 0 || x > term->cols) + return; + + ldata = scrlineptr(y); + check_trust_status(term, ldata); + check_line_size(term, ldata); + if (x == term->cols) { + ldata->lattr &= ~LATTR_WRAPPED2; + } else { + if (ldata->chars[x].chr == UCSWIDE) { + clear_cc(ldata, x-1); + clear_cc(ldata, x); + ldata->chars[x-1].chr = ' ' | CSET_ASCII; + ldata->chars[x] = ldata->chars[x-1]; + } + } +} + +/* + * Erase a large portion of the screen: the whole screen, or the + * whole line, or parts thereof. + */ +static void erase_lots(Terminal *term, + bool line_only, bool from_begin, bool to_end) +{ + pos start, end; + bool erase_lattr; + bool erasing_lines_from_top = false; + + if (line_only) { + start.y = term->curs.y; + start.x = 0; + end.y = term->curs.y + 1; + end.x = 0; + erase_lattr = false; + } else { + start.y = 0; + start.x = 0; + end.y = term->rows; + end.x = 0; + erase_lattr = true; + } + + /* This is the endpoint of the clearing operation that is not + * either the start or end of the line / screen. */ + pos boundary = term->curs; + + if (!from_begin) { + /* + * If we're erasing from the current char to the end of + * line/screen, then we take account of wrapnext, so as to + * maintain the invariant that writing a printing character + * followed by ESC[K should not overwrite the character you + * _just wrote_. That is, when wrapnext says the cursor is + * 'logically' at the very rightmost edge of the screen + * instead of just before the last printing char, ESC[K should + * do nothing at all, and ESC[J should clear the next line but + * leave this one unchanged. + * + * This adjusted position will also be the position we use for + * check_boundary (i.e. the thing we ensure isn't in the + * middle of a double-width printing char). + */ + if (term->wrapnext) + incpos(boundary); + + start = boundary; + } + if (!to_end) { + /* + * If we're erasing from the start of (at least) the line _to_ + * the current position, then that is taken to mean 'inclusive + * of the cell under the cursor', which means we don't + * consider wrapnext at all: whether it's set or not, we still + * clear the cell under the cursor. + * + * Again, that incremented boundary position is where we + * should be careful of a straddling wide character. + */ + incpos(boundary); + end = boundary; + } + if (!from_begin || !to_end) + check_boundary(term, boundary.x, boundary.y); + check_selection(term, start, end); + + /* Clear screen also forces a full window redraw, just in case. */ + if (start.y == 0 && start.x == 0 && end.y == term->rows) + term_invalidate(term); + + /* Lines scrolled away shouldn't be brought back on if the terminal + * resizes. */ + if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr) + erasing_lines_from_top = true; + + if (term->erase_to_scrollback && erasing_lines_from_top) { + /* If it's a whole number of lines, starting at the top, and + * we're fully erasing them, erase by scrolling and keep the + * lines in the scrollback. */ + int scrolllines = end.y; + if (end.y == term->rows) { + /* Shrink until we find a non-empty row.*/ + scrolllines = find_last_nonempty_line(term, term->screen) + 1; + } + if (scrolllines > 0) + scroll(term, 0, scrolllines - 1, scrolllines, true); + } else { + termline *ldata = scrlineptr(start.y); + check_trust_status(term, ldata); + while (poslt(start, end)) { + check_line_size(term, ldata); + if (start.x == term->cols) { + if (!erase_lattr) + ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2); + else + ldata->lattr = LATTR_NORM; + } else { + copy_termchar(ldata, start.x, &term->erase_char); + } + if (incpos(start) && start.y < term->rows) { + ldata = scrlineptr(start.y); + check_trust_status(term, ldata); + } + } + } + + /* After an erase of lines from the top of the screen, we shouldn't + * bring the lines back again if the terminal enlarges (since the user or + * application has explicitly thrown them away). */ + if (erasing_lines_from_top && !(term->alt_which)) + term->tempsblines = 0; +} + +/* + * Insert or delete characters within the current line. n is +ve if + * insertion is desired, and -ve for deletion. + */ +static void insch(Terminal *term, int n) +{ + int dir = (n < 0 ? -1 : +1); + int m, j; + pos eol; + termline *ldata; + + n = (n < 0 ? -n : n); + if (n > term->cols - term->curs.x) + n = term->cols - term->curs.x; + m = term->cols - term->curs.x - n; + + /* + * We must de-highlight the selection if it overlaps any part of + * the region affected by this operation, i.e. the region from the + * current cursor position to end-of-line, _unless_ the entirety + * of the selection is going to be moved to the left or right by + * this operation but otherwise unchanged, in which case we can + * simply move the highlight with the text. + */ + eol.y = term->curs.y; + eol.x = term->cols; + if (poslt(term->curs, term->selend) && poslt(term->selstart, eol)) { + pos okstart = term->curs; + pos okend = eol; + if (dir > 0) { + /* Insertion: n characters at EOL will be splatted. */ + okend.x -= n; + } else { + /* Deletion: n characters at cursor position will be splatted. */ + okstart.x += n; + } + if (posle(okstart, term->selstart) && posle(term->selend, okend)) { + /* Selection is contained entirely in the interval + * [okstart,okend), so we need only adjust the selection + * bounds. */ + term->selstart.x += dir * n; + term->selend.x += dir * n; + assert(term->selstart.x >= term->curs.x); + assert(term->selstart.x < term->cols); + assert(term->selend.x > term->curs.x); + assert(term->selend.x <= term->cols); + } else { + /* Selection is not wholly contained in that interval, so + * we must unhighlight it. */ + deselect(term); + } + } + + check_boundary(term, term->curs.x, term->curs.y); + if (dir < 0) + check_boundary(term, term->curs.x + n, term->curs.y); + ldata = scrlineptr(term->curs.y); + check_trust_status(term, ldata); + if (dir < 0) { + for (j = 0; j < m; j++) + move_termchar(ldata, + ldata->chars + term->curs.x + j, + ldata->chars + term->curs.x + j + n); + while (n--) + copy_termchar(ldata, term->curs.x + m++, &term->erase_char); + } else { + for (j = m; j-- ;) + move_termchar(ldata, + ldata->chars + term->curs.x + j + n, + ldata->chars + term->curs.x + j); + while (n--) + copy_termchar(ldata, term->curs.x + n, &term->erase_char); + } +} + +static void term_update_raw_mouse_mode(Terminal *term) +{ + bool want_raw = (term->xterm_mouse != 0 && !term->xterm_mouse_forbidden); + win_set_raw_mouse_mode(term->win, want_raw); + term->win_pointer_shape_pending = true; + term->win_pointer_shape_raw = want_raw; + term_schedule_update(term); +} + +/* + * Toggle terminal mode `mode' to state `state'. (`query' indicates + * whether the mode is a DEC private one or a normal one.) + */ +static void toggle_mode(Terminal *term, int mode, int query, bool state) +{ + if (query == 1) { + switch (mode) { + case 1: /* DECCKM: application cursor keys */ + term->app_cursor_keys = state; + break; + case 2: /* DECANM: VT52 mode */ + term->vt52_mode = !state; + if (term->vt52_mode) { + term->blink_is_real = false; + term->vt52_bold = false; + } else { + term->blink_is_real = term->blinktext; + } + term_schedule_tblink(term); + break; + case 3: /* DECCOLM: 80/132 columns */ + deselect(term); + if (!term->no_remote_resize) { + term->win_resize_pending = true; + term->win_resize_pending_w = state ? 132 : 80; + term->win_resize_pending_h = term->rows; + term_schedule_update(term); + } + term->reset_132 = state; + term->alt_t = term->marg_t = 0; + term->alt_b = term->marg_b = term->rows - 1; + move(term, 0, 0, 0); + erase_lots(term, false, true, true); + break; + case 5: /* DECSCNM: reverse video */ + /* + * Toggle reverse video. If we receive an OFF within the + * visual bell timeout period after an ON, we trigger an + * effective visual bell, so that ESC[?5hESC[?5l will + * always be an actually _visible_ visual bell. + */ + if (term->rvideo && !state) { + /* This is an OFF, so set up a vbell */ + term_schedule_vbell(term, true, term->rvbell_startpoint); + } else if (!term->rvideo && state) { + /* This is an ON, so we notice the time and save it. */ + term->rvbell_startpoint = GETTICKCOUNT(); + } + term->rvideo = state; + seen_disp_event(term); + break; + case 6: /* DECOM: DEC origin mode */ + term->dec_om = state; + break; + case 7: /* DECAWM: auto wrap */ + term->wrap = state; + break; + case 8: /* DECARM: auto key repeat */ + term->repeat_off = !state; + break; + case 25: /* DECTCEM: enable/disable cursor */ + compatibility2(OTHER, VT220); + term->cursor_on = state; + seen_disp_event(term); + break; + case 47: /* alternate screen */ + compatibility(OTHER); + deselect(term); + swap_screen(term, term->no_alt_screen ? 0 : state, false, false); + if (term->scroll_on_disp) + term->disptop = 0; + break; + case 1000: /* xterm mouse 1 (normal) */ + term->xterm_mouse = state ? 1 : 0; + term_update_raw_mouse_mode(term); + break; + case 1002: /* xterm mouse 2 (inc. button drags) */ + term->xterm_mouse = state ? 2 : 0; + term_update_raw_mouse_mode(term); + break; + case 1006: /* xterm extended mouse */ + term->xterm_extended_mouse = state; + break; + case 1015: /* urxvt extended mouse */ + term->urxvt_extended_mouse = state; + break; + case 1047: /* alternate screen */ + compatibility(OTHER); + deselect(term); + swap_screen(term, term->no_alt_screen ? 0 : state, true, true); + if (term->scroll_on_disp) + term->disptop = 0; + break; + case 1048: /* save/restore cursor */ + if (!term->no_alt_screen) + save_cursor(term, state); + if (!state) seen_disp_event(term); + break; + case 1049: /* cursor & alternate screen */ + if (state && !term->no_alt_screen) + save_cursor(term, state); + if (!state) seen_disp_event(term); + compatibility(OTHER); + deselect(term); + swap_screen(term, term->no_alt_screen ? 0 : state, true, false); + if (!state && !term->no_alt_screen) + save_cursor(term, state); + if (term->scroll_on_disp) + term->disptop = 0; + break; + case 2004: /* xterm bracketed paste */ + term->bracketed_paste = state ? true : false; + break; + } + } else if (query == 0) { + switch (mode) { + case 4: /* IRM: set insert mode */ + compatibility(VT102); + term->insert = state; + break; + case 12: /* SRM: set echo mode */ + term->srm_echo = !state; + break; + case 20: /* LNM: Return sends ... */ + term->cr_lf_return = state; + break; + case 34: /* WYULCURM: Make cursor BIG */ + compatibility2(OTHER, VT220); + term->big_cursor = !state; + } + } +} + +/* + * Process an OSC sequence: set window title or icon name. + */ +static void do_osc(Terminal *term) +{ + if (term->osc_w) { + while (term->osc_strlen--) + term->wordness[(unsigned char) + term->osc_string[term->osc_strlen]] = term->esc_args[0]; + } else { + term->osc_string[term->osc_strlen] = '\0'; + switch (term->esc_args[0]) { + case 0: + case 1: + if (!term->no_remote_wintitle) { + sfree(term->icon_title); + term->icon_title = dupstr(term->osc_string); + term->win_icon_title_pending = true; + term_schedule_update(term); + } + if (term->esc_args[0] == 1) + break; + /* fall through: parameter 0 means set both */ + case 2: + case 21: + if (!term->no_remote_wintitle) { + sfree(term->window_title); + term->window_title = dupstr(term->osc_string); + term->win_title_pending = true; + term_schedule_update(term); + } + break; + case 4: + if (term->ldisc && !strcmp(term->osc_string, "?")) { + unsigned index = term->esc_args[1]; + if (index < OSC4_NCOLOURS) { + rgb colour = term->palette[index]; + char *reply_buf = dupprintf( + "\033]4;%u;rgb:%04x/%04x/%04x\007", index, + (unsigned)colour.r * 0x0101, + (unsigned)colour.g * 0x0101, + (unsigned)colour.b * 0x0101); + ldisc_send(term->ldisc, reply_buf, strlen(reply_buf), + false); + sfree(reply_buf); + } + } + break; + } + } +} + +/* + * ANSI printing routines. + */ +static void term_print_setup(Terminal *term, char *printer) +{ + bufchain_clear(&term->printer_buf); + term->print_job = printer_start_job(printer); +} +static void term_print_flush(Terminal *term) +{ + size_t size; + while ((size = bufchain_size(&term->printer_buf)) > 5) { + ptrlen data = bufchain_prefix(&term->printer_buf); + if (data.len > size-5) + data.len = size-5; + printer_job_data(term->print_job, data.ptr, data.len); + bufchain_consume(&term->printer_buf, data.len); + } +} +static void term_print_finish(Terminal *term) +{ + size_t size; + char c; + + if (!term->printing && !term->only_printing) + return; /* we need do nothing */ + + term_print_flush(term); + while ((size = bufchain_size(&term->printer_buf)) > 0) { + ptrlen data = bufchain_prefix(&term->printer_buf); + c = *(char *)data.ptr; + if (c == '\033' || c == '\233') { + bufchain_consume(&term->printer_buf, size); + break; + } else { + printer_job_data(term->print_job, &c, 1); + bufchain_consume(&term->printer_buf, 1); + } + } + printer_finish_job(term->print_job); + term->print_job = NULL; + term->printing = term->only_printing = false; +} + +static void term_display_graphic_char(Terminal *term, unsigned long c) +{ + termline *cline = scrlineptr(term->curs.y); + int width = 0; + if (DIRECT_CHAR(c)) + width = 1; + if (!width) + width = term_char_width(term, c); + + if (term->wrapnext && term->wrap && width > 0) { + cline->lattr |= LATTR_WRAPPED; + if (term->curs.y == term->marg_b) + scroll(term, term->marg_t, term->marg_b, 1, true); + else if (term->curs.y < term->rows - 1) + term->curs.y++; + term->curs.x = 0; + term->wrapnext = false; + cline = scrlineptr(term->curs.y); + } + if (term->insert && width > 0) + insch(term, width); + if (term->selstate != NO_SELECTION) { + pos cursplus = term->curs; + incpos(cursplus); + check_selection(term, term->curs, cursplus); + } + if (((c & CSET_MASK) == CSET_ASCII || + (c & CSET_MASK) == 0) && term->logctx) + logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII); + + check_trust_status(term, cline); + + int linecols = term->cols; + if (cline->trusted) + linecols -= TRUST_SIGIL_WIDTH; + + /* + * Preliminary check: if the terminal is only one character cell + * wide, then we cannot display any double-width character at all. + * Substitute single-width REPLACEMENT CHARACTER instead. + */ + if (width == 2 && linecols < 2) { + width = 1; + c = 0xFFFD; + } + + switch (width) { + case 2: + /* + * If we're about to display a double-width character starting + * in the rightmost column, then we do something special + * instead. We must print a space in the last column of the + * screen, then wrap; and we also set LATTR_WRAPPED2 which + * instructs subsequent cut-and-pasting not only to splice + * this line to the one after it, but to ignore the space in + * the last character position as well. (Because what was + * actually output to the terminal was presumably just a + * sequence of CJK characters, and we don't want a space to be + * pasted in the middle of those just because they had the + * misfortune to start in the wrong parity column. xterm + * concurs.) + */ + check_boundary(term, term->curs.x, term->curs.y); + check_boundary(term, term->curs.x+2, term->curs.y); + if (term->curs.x >= linecols-1) { + copy_termchar(cline, term->curs.x, + &term->erase_char); + cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2; + if (term->curs.y == term->marg_b) + scroll(term, term->marg_t, term->marg_b, + 1, true); + else if (term->curs.y < term->rows - 1) + term->curs.y++; + term->curs.x = 0; + cline = scrlineptr(term->curs.y); + /* Now we must check_boundary again, of course. */ + check_boundary(term, term->curs.x, term->curs.y); + check_boundary(term, term->curs.x+2, term->curs.y); + } + + /* FULL-TERMCHAR */ + clear_cc(cline, term->curs.x); + cline->chars[term->curs.x].chr = c; + cline->chars[term->curs.x].attr = term->curr_attr; + cline->chars[term->curs.x].truecolour = + term->curr_truecolour; + + term->curs.x++; + + /* FULL-TERMCHAR */ + clear_cc(cline, term->curs.x); + cline->chars[term->curs.x].chr = UCSWIDE; + cline->chars[term->curs.x].attr = term->curr_attr; + cline->chars[term->curs.x].truecolour = + term->curr_truecolour; + + break; + case 1: + check_boundary(term, term->curs.x, term->curs.y); + check_boundary(term, term->curs.x+1, term->curs.y); + + /* FULL-TERMCHAR */ + clear_cc(cline, term->curs.x); + cline->chars[term->curs.x].chr = c; + cline->chars[term->curs.x].attr = term->curr_attr; + cline->chars[term->curs.x].truecolour = + term->curr_truecolour; + + break; + case 0: + if (term->curs.x > 0) { + int x = term->curs.x - 1; + + /* If we're in wrapnext state, the character to combine + * with is _here_, not to our left. */ + if (term->wrapnext) + x++; + + /* + * If the previous character is UCSWIDE, back up another + * one. + */ + if (cline->chars[x].chr == UCSWIDE) { + assert(x > 0); + x--; + } + + add_cc(cline, x, c); + seen_disp_event(term); + } + return; + default: + return; + } + term->curs.x++; + if (term->curs.x >= linecols) { + term->curs.x = linecols - 1; + term->wrapnext = true; + if (term->wrap && term->vt52_mode) { + cline->lattr |= LATTR_WRAPPED; + if (term->curs.y == term->marg_b) + scroll(term, term->marg_t, term->marg_b, 1, true); + else if (term->curs.y < term->rows - 1) + term->curs.y++; + term->curs.x = 0; + term->wrapnext = false; + } + } + seen_disp_event(term); +} + +static strbuf *term_input_data_from_unicode( + Terminal *term, const wchar_t *widebuf, int len) +{ + strbuf *buf = strbuf_new(); + + if (in_utf(term)) { + /* + * Translate input wide characters into UTF-8 to go in the + * terminal's input data queue. + */ + for (int i = 0; i < len; i++) { + unsigned long ch = widebuf[i]; + + if (IS_SURROGATE(ch)) { +#ifdef PLATFORM_IS_UTF16 + if (i+1 < len) { + unsigned long ch2 = widebuf[i+1]; + if (IS_SURROGATE_PAIR(ch, ch2)) { + ch = FROM_SURROGATES(ch, ch2); + i++; + } + } else +#endif + { + /* Unrecognised UTF-16 sequence */ + ch = '.'; + } + } + + char utf8_chr[6]; + put_data(buf, utf8_chr, encode_utf8(utf8_chr, ch)); + } + } else { + /* + * Call to the character-set subsystem to translate into + * whatever charset the terminal is currently configured in. + * + * Since the terminal doesn't currently support any multibyte + * character set other than UTF-8, we can assume here that + * there will be at most one output byte per input wchar_t. + * (But also we must allow space for the trailing NUL that + * wc_to_mb will write.) + */ + char *bufptr = strbuf_append(buf, len + 1); + int rv; + rv = wc_to_mb(term->ucsdata->line_codepage, 0, widebuf, len, + bufptr, len + 1, NULL, term->ucsdata); + strbuf_shrink_to(buf, rv < 0 ? 0 : rv); + } + + return buf; +} + +static strbuf *term_input_data_from_charset( + Terminal *term, int codepage, const char *str, int len) +{ + strbuf *buf; + + if (codepage < 0) { + buf = strbuf_new(); + put_data(buf, str, len); + } else { + int widesize = len * 2; /* allow for UTF-16 surrogates */ + wchar_t *widebuf = snewn(widesize, wchar_t); + int widelen = mb_to_wc(codepage, 0, str, len, widebuf, widesize); + buf = term_input_data_from_unicode(term, widebuf, widelen); + sfree(widebuf); + } + + return buf; +} + +static inline void term_bracketed_paste_start(Terminal *term) +{ + ptrlen seq = PTRLEN_LITERAL("\033[200~"); + if (term->ldisc) + ldisc_send(term->ldisc, seq.ptr, seq.len, false); + term->bracketed_paste_active = true; +} + +static inline void term_bracketed_paste_stop(Terminal *term) +{ + if (!term->bracketed_paste_active) + return; + + ptrlen seq = PTRLEN_LITERAL("\033[201~"); + if (term->ldisc) + ldisc_send(term->ldisc, seq.ptr, seq.len, false); + term->bracketed_paste_active = false; +} + +static inline void term_keyinput_internal( + Terminal *term, const void *buf, int len, bool interactive) +{ + if (term->srm_echo) { + /* + * Implement the terminal-level local echo behaviour that + * ECMA-48 specifies when terminal mode 12 is configured off + * (ESC[12l). In this mode, data input to the terminal via the + * keyboard is also added to the output buffer. But this + * doesn't apply to escape sequences generated as session + * input _within_ the terminal, e.g. in response to terminal + * query sequences, or the bracketing sequences of bracketed + * paste mode. Those will be sent directly via + * ldisc_send(term->ldisc, ...) and won't go through this + * function. + */ + + /* Mimic the special case of negative length in ldisc_send */ + int true_len = len >= 0 ? len : strlen(buf); + + bufchain_add(&term->inbuf, buf, true_len); + term_added_data(term); + } + if (interactive) + term_bracketed_paste_stop(term); + if (term->ldisc) + ldisc_send(term->ldisc, buf, len, interactive); + term_seen_key_event(term); +} + +unsigned long term_translate( + Terminal *term, struct term_utf8_decode *utf8, unsigned char c) +{ + if (in_utf(term)) { + switch (utf8->state) { + case 0: + if (c < 0x80) { + /* UTF-8 must be stateless so we ignore iso2022. */ + if (term->ucsdata->unitab_ctrl[c] != 0xFF) { + return term->ucsdata->unitab_ctrl[c]; + } else if ((term->utf8linedraw) && + (term->cset_attr[term->cset] == CSET_LINEDRW)) { + /* Linedraw characters are explicitly enabled */ + return c | CSET_LINEDRW; + } else { + return c | CSET_ASCII; + } + } else if ((c & 0xe0) == 0xc0) { + utf8->size = utf8->state = 1; + utf8->chr = (c & 0x1f); + } else if ((c & 0xf0) == 0xe0) { + utf8->size = utf8->state = 2; + utf8->chr = (c & 0x0f); + } else if ((c & 0xf8) == 0xf0) { + utf8->size = utf8->state = 3; + utf8->chr = (c & 0x07); + } else if ((c & 0xfc) == 0xf8) { + utf8->size = utf8->state = 4; + utf8->chr = (c & 0x03); + } else if ((c & 0xfe) == 0xfc) { + utf8->size = utf8->state = 5; + utf8->chr = (c & 0x01); + } else { + return UCSINVALID; + } + return UCSINCOMPLETE; + case 1: + case 2: + case 3: + case 4: + case 5: + if ((c & 0xC0) != 0x80) { + utf8->state = 0; + return UCSTRUNCATED; /* caller will then give us the + * same byte again */ + } + utf8->chr = (utf8->chr << 6) | (c & 0x3f); + if (--utf8->state) + return UCSINCOMPLETE; + + unsigned long t = utf8->chr; + + /* Is somebody trying to be evil! */ + if (t < 0x80 || + (t < 0x800 && utf8->size >= 2) || + (t < 0x10000 && utf8->size >= 3) || + (t < 0x200000 && utf8->size >= 4) || + (t < 0x4000000 && utf8->size >= 5)) + return UCSINVALID; + + /* Unicode line separator and paragraph separator are CR-LF */ + if (t == 0x2028 || t == 0x2029) + return 0x85; + + /* High controls are probably a Baaad idea too. */ + if (t < 0xA0) + return 0xFFFD; + + /* The UTF-16 surrogates are not nice either. */ + /* The standard give the option of decoding these: + * I don't want to! */ + if (t >= 0xD800 && t < 0xE000) + return UCSINVALID; + + /* ISO 10646 characters now limited to UTF-16 range. */ + if (t > 0x10FFFF) + return UCSINVALID; + + /* This is currently a TagPhobic application.. */ + if (t >= 0xE0000 && t <= 0xE007F) + return UCSINCOMPLETE; + + /* U+FEFF is best seen as a null. */ + if (t == 0xFEFF) + return UCSINCOMPLETE; + /* But U+FFFE is an error. */ + if (t == 0xFFFE || t == 0xFFFF) + return UCSINVALID; + + return t; + } + } else if (term->sco_acs && + (c!='\033' && c!='\012' && c!='\015' && c!='\b')) { + /* Are we in the nasty ACS mode? Note: no sco in utf mode. */ + if (term->sco_acs == 2) + c |= 0x80; + + return c | CSET_SCOACS; + } else { + switch (term->cset_attr[term->cset]) { + /* + * Linedraw characters are different from 'ESC ( B' + * only for a small range. For ones outside that + * range, make sure we use the same font as well as + * the same encoding. + */ + case CSET_LINEDRW: + if (term->ucsdata->unitab_ctrl[c] != 0xFF) + return term->ucsdata->unitab_ctrl[c]; + else + return c | CSET_LINEDRW; + break; + + case CSET_GBCHR: + /* If UK-ASCII, make the '#' a LineDraw Pound */ + if (c == '#') + return '}' | CSET_LINEDRW; + /* fall through */ + + case CSET_ASCII: + if (term->ucsdata->unitab_ctrl[c] != 0xFF) + return term->ucsdata->unitab_ctrl[c]; + else + return c | CSET_ASCII; + break; + case CSET_SCOACS: + if (c >= ' ') + return c | CSET_SCOACS; + break; + } + } + return c; +} + +/* + * Remove everything currently in `inbuf' and stick it up on the + * in-memory display. There's a big state machine in here to + * process escape sequences... + */ +static void term_out(Terminal *term) +{ + unsigned long c; + int unget; + unsigned char localbuf[256], *chars; + size_t nchars = 0; + + unget = -1; + + chars = NULL; /* placate compiler warnings */ + while (nchars > 0 || unget != -1 || bufchain_size(&term->inbuf) > 0) { + if (unget == -1) { + if (nchars == 0) { + ptrlen data = bufchain_prefix(&term->inbuf); + if (data.len > sizeof(localbuf)) + data.len = sizeof(localbuf); + memcpy(localbuf, data.ptr, data.len); + bufchain_consume(&term->inbuf, data.len); + nchars = data.len; + chars = localbuf; + assert(chars != NULL); + assert(nchars > 0); + } + c = *chars++; + nchars--; + + /* + * Optionally log the session traffic to a file. Useful for + * debugging and possibly also useful for actual logging. + */ + if (term->logtype == LGTYP_DEBUG && term->logctx) + logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG); + } else { + c = unget; + unget = -1; + } + + /* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even + * be able to display 8-bit characters, but I'll let that go 'cause + * of i18n. + */ + + /* + * If we're printing, add the character to the printer + * buffer. + */ + if (term->printing) { + bufchain_add(&term->printer_buf, &c, 1); + + /* + * If we're in print-only mode, we use a much simpler + * state machine designed only to recognise the ESC[4i + * termination sequence. + */ + if (term->only_printing) { + if (c == '\033') + term->print_state = 1; + else if (c == (unsigned char)'\233') + term->print_state = 2; + else if (c == '[' && term->print_state == 1) + term->print_state = 2; + else if (c == '4' && term->print_state == 2) + term->print_state = 3; + else if (c == 'i' && term->print_state == 3) + term->print_state = 4; + else + term->print_state = 0; + if (term->print_state == 4) { + term_print_finish(term); + } + continue; + } + } + + /* Do character-set translation. */ + if (term->termstate == TOPLEVEL) { + unsigned long t = term_translate(term, &term->utf8, c); + switch (t) { + case UCSINCOMPLETE: + continue; /* didn't complete a multibyte char */ + case UCSTRUNCATED: + unget = c; + /* fall through */ + case UCSINVALID: + c = UCSERR; + break; + default: + c = t; + break; + } + } + + /* + * How about C1 controls? + * Explicitly ignore SCI (0x9a), which we don't translate to DECID. + */ + if ((c & -32) == 0x80 && term->termstate < DO_CTRLS && + !term->vt52_mode && has_compat(VT220)) { + if (c == 0x9a) + c = 0; + else { + term->termstate = SEEN_ESC; + term->esc_query = 0; + c = '@' + (c & 0x1F); + } + } + + /* Or the GL control. */ + if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) { + if (term->curs.x && !term->wrapnext) + term->curs.x--; + term->wrapnext = false; + /* destructive backspace might be disabled */ + if (!term->no_dbackspace) { + check_boundary(term, term->curs.x, term->curs.y); + check_boundary(term, term->curs.x+1, term->curs.y); + copy_termchar(scrlineptr(term->curs.y), + term->curs.x, &term->erase_char); + } + } else + /* Or normal C0 controls. */ + if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) { + switch (c) { + case '\005': /* ENQ: terminal type query */ + /* + * Strictly speaking this is VT100 but a VT100 defaults to + * no response. Other terminals respond at their option. + * + * Don't put a CR in the default string as this tends to + * upset some weird software. + */ + compatibility(ANSIMIN); + if (term->ldisc) { + strbuf *buf = term_input_data_from_charset( + term, DEFAULT_CODEPAGE, + term->answerback, term->answerbacklen); + ldisc_send(term->ldisc, buf->s, buf->len, false); + strbuf_free(buf); + } + break; + case '\007': { /* BEL: Bell */ + struct beeptime *newbeep; + unsigned long ticks; + + ticks = GETTICKCOUNT(); + + if (!term->beep_overloaded) { + newbeep = snew(struct beeptime); + newbeep->ticks = ticks; + newbeep->next = NULL; + if (!term->beephead) + term->beephead = newbeep; + else + term->beeptail->next = newbeep; + term->beeptail = newbeep; + term->nbeeps++; + } + + /* + * Throw out any beeps that happened more than + * t seconds ago. + */ + while (term->beephead && + term->beephead->ticks < ticks - term->bellovl_t) { + struct beeptime *tmp = term->beephead; + term->beephead = tmp->next; + sfree(tmp); + if (!term->beephead) + term->beeptail = NULL; + term->nbeeps--; + } + + if (term->bellovl && term->beep_overloaded && + ticks - term->lastbeep >= (unsigned)term->bellovl_s) { + /* + * If we're currently overloaded and the + * last beep was more than s seconds ago, + * leave overload mode. + */ + term->beep_overloaded = false; + } else if (term->bellovl && !term->beep_overloaded && + term->nbeeps >= term->bellovl_n) { + /* + * Now, if we have n or more beeps + * remaining in the queue, go into overload + * mode. + */ + term->beep_overloaded = true; + } + term->lastbeep = ticks; + + /* + * Perform an actual beep if we're not overloaded. + */ + if (!term->bellovl || !term->beep_overloaded) { + win_bell(term->win, term->beep); + + if (term->beep == BELL_VISUAL) { + term_schedule_vbell(term, false, 0); + } + } + seen_disp_event(term); + break; + } + case '\b': /* BS: Back space */ + if (term->curs.x == 0 && (term->curs.y == 0 || !term->wrap)) + /* do nothing */ ; + else if (term->curs.x == 0 && term->curs.y > 0) + term->curs.x = term->cols - 1, term->curs.y--; + else if (term->wrapnext) + term->wrapnext = false; + else + term->curs.x--; + seen_disp_event(term); + break; + case '\016': /* LS1: Locking-shift one */ + compatibility(VT100); + term->cset = 1; + break; + case '\017': /* LS0: Locking-shift zero */ + compatibility(VT100); + term->cset = 0; + break; + case '\033': /* ESC: Escape */ + if (term->vt52_mode) + term->termstate = VT52_ESC; + else { + compatibility(ANSIMIN); + term->termstate = SEEN_ESC; + term->esc_query = 0; + } + break; + case '\015': /* CR: Carriage return */ + term->curs.x = 0; + term->wrapnext = false; + seen_disp_event(term); + + if (term->crhaslf) { + if (term->curs.y == term->marg_b) + scroll(term, term->marg_t, term->marg_b, 1, true); + else if (term->curs.y < term->rows - 1) + term->curs.y++; + } + if (term->logctx) + logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII); + break; + case '\014': /* FF: Form feed */ + if (has_compat(SCOANSI)) { + move(term, 0, 0, 0); + erase_lots(term, false, false, true); + if (term->scroll_on_disp) + term->disptop = 0; + term->wrapnext = false; + seen_disp_event(term); + break; + } + case '\013': /* VT: Line tabulation */ + compatibility(VT100); + case '\012': /* LF: Line feed */ + if (term->curs.y == term->marg_b) + scroll(term, term->marg_t, term->marg_b, 1, true); + else if (term->curs.y < term->rows - 1) + term->curs.y++; + if (term->lfhascr) + term->curs.x = 0; + term->wrapnext = false; + seen_disp_event(term); + if (term->logctx) + logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII); + break; + case '\t': { /* HT: Character tabulation */ + pos old_curs = term->curs; + termline *ldata = scrlineptr(term->curs.y); + + do { + term->curs.x++; + } while (term->curs.x < term->cols - 1 && + !term->tabs[term->curs.x]); + + if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) { + if (term->curs.x >= term->cols / 2) + term->curs.x = term->cols / 2 - 1; + } else { + if (term->curs.x >= term->cols) + term->curs.x = term->cols - 1; + } + + check_selection(term, old_curs, term->curs); + seen_disp_event(term); + break; + } + } + } else + switch (term->termstate) { + case TOPLEVEL: + /* Only graphic characters get this far; + * ctrls are stripped above */ + term_display_graphic_char(term, c); + term->last_graphic_char = c; + break; + + case OSC_MAYBE_ST: + /* + * This state is virtually identical to SEEN_ESC, with the + * exception that we have an OSC sequence in the pipeline, + * and _if_ we see a backslash, we process it. + */ + if (c == '\\') { + do_osc(term); + term->termstate = TOPLEVEL; + break; + } + /* else fall through */ + case SEEN_ESC: + if (c >= ' ' && c <= '/') { + if (term->esc_query) + term->esc_query = -1; + else + term->esc_query = c; + break; + } + term->termstate = TOPLEVEL; + switch (ANSI(c, term->esc_query)) { + case '[': /* enter CSI mode */ + term->termstate = SEEN_CSI; + term->esc_nargs = 1; + term->esc_args[0] = ARG_DEFAULT; + term->esc_query = 0; + break; + case ']': /* OSC: xterm escape sequences */ + /* Compatibility is nasty here, xterm, linux, decterm yuk! */ + compatibility(OTHER); + term->termstate = SEEN_OSC; + term->esc_args[0] = 0; + term->esc_nargs = 1; + break; + case '7': /* DECSC: save cursor */ + compatibility(VT100); + save_cursor(term, true); + break; + case '8': /* DECRC: restore cursor */ + compatibility(VT100); + save_cursor(term, false); + seen_disp_event(term); + break; + case '=': /* DECKPAM: Keypad application mode */ + compatibility(VT100); + term->app_keypad_keys = true; + break; + case '>': /* DECKPNM: Keypad numeric mode */ + compatibility(VT100); + term->app_keypad_keys = false; + break; + case 'D': /* IND: exactly equivalent to LF */ + compatibility(VT100); + if (term->curs.y == term->marg_b) + scroll(term, term->marg_t, term->marg_b, 1, true); + else if (term->curs.y < term->rows - 1) + term->curs.y++; + term->wrapnext = false; + seen_disp_event(term); + break; + case 'E': /* NEL: exactly equivalent to CR-LF */ + compatibility(VT100); + term->curs.x = 0; + if (term->curs.y == term->marg_b) + scroll(term, term->marg_t, term->marg_b, 1, true); + else if (term->curs.y < term->rows - 1) + term->curs.y++; + term->wrapnext = false; + seen_disp_event(term); + break; + case 'M': /* RI: reverse index - backwards LF */ + compatibility(VT100); + if (term->curs.y == term->marg_t) + scroll(term, term->marg_t, term->marg_b, -1, true); + else if (term->curs.y > 0) + term->curs.y--; + term->wrapnext = false; + seen_disp_event(term); + break; + case 'Z': /* DECID: terminal type query */ + compatibility(VT100); + if (term->ldisc) + ldisc_send(term->ldisc, term->id_string, + strlen(term->id_string), false); + break; + case 'c': /* RIS: restore power-on settings */ + compatibility(VT100); + power_on(term, true); + if (term->ldisc) /* cause ldisc to notice changes */ + ldisc_echoedit_update(term->ldisc); + if (term->reset_132) { + if (!term->no_remote_resize) { + term->win_resize_pending = true; + term->win_resize_pending_w = 80; + term->win_resize_pending_h = term->rows; + term_schedule_update(term); + } + term->reset_132 = false; + } + if (term->scroll_on_disp) + term->disptop = 0; + seen_disp_event(term); + break; + case 'H': /* HTS: set a tab */ + compatibility(VT100); + term->tabs[term->curs.x] = true; + break; + + case ANSI('8', '#'): { /* DECALN: fills screen with Es :-) */ + compatibility(VT100); + termline *ldata; + int i, j; + pos scrtop, scrbot; + + for (i = 0; i < term->rows; i++) { + ldata = scrlineptr(i); + check_line_size(term, ldata); + for (j = 0; j < term->cols; j++) { + copy_termchar(ldata, j, + &term->basic_erase_char); + ldata->chars[j].chr = 'E'; + } + ldata->lattr = LATTR_NORM; + } + if (term->scroll_on_disp) + term->disptop = 0; + seen_disp_event(term); + scrtop.x = scrtop.y = 0; + scrbot.x = 0; + scrbot.y = term->rows; + check_selection(term, scrtop, scrbot); + break; + } + + case ANSI('3', '#'): + case ANSI('4', '#'): + case ANSI('5', '#'): + case ANSI('6', '#'): { + compatibility(VT100); + int nlattr; + termline *ldata; + + switch (ANSI(c, term->esc_query)) { + case ANSI('3', '#'): /* DECDHL: 2*height, top */ + nlattr = LATTR_TOP; + break; + case ANSI('4', '#'): /* DECDHL: 2*height, bottom */ + nlattr = LATTR_BOT; + break; + case ANSI('5', '#'): /* DECSWL: normal */ + nlattr = LATTR_NORM; + break; + default: /* case ANSI('6', '#'): DECDWL: 2*width */ + nlattr = LATTR_WIDE; + break; + } + ldata = scrlineptr(term->curs.y); + check_line_size(term, ldata); + check_trust_status(term, ldata); + ldata->lattr = nlattr; + break; + } + /* GZD4: G0 designate 94-set */ + case ANSI('A', '('): + compatibility(VT100); + if (!term->no_remote_charset) + term->cset_attr[0] = CSET_GBCHR; + break; + case ANSI('B', '('): + compatibility(VT100); + if (!term->no_remote_charset) + term->cset_attr[0] = CSET_ASCII; + break; + case ANSI('0', '('): + compatibility(VT100); + if (!term->no_remote_charset) + term->cset_attr[0] = CSET_LINEDRW; + break; + case ANSI('U', '('): + compatibility(OTHER); + if (!term->no_remote_charset) + term->cset_attr[0] = CSET_SCOACS; + break; + /* G1D4: G1-designate 94-set */ + case ANSI('A', ')'): + compatibility(VT100); + if (!term->no_remote_charset) + term->cset_attr[1] = CSET_GBCHR; + break; + case ANSI('B', ')'): + compatibility(VT100); + if (!term->no_remote_charset) + term->cset_attr[1] = CSET_ASCII; + break; + case ANSI('0', ')'): + compatibility(VT100); + if (!term->no_remote_charset) + term->cset_attr[1] = CSET_LINEDRW; + break; + case ANSI('U', ')'): + compatibility(OTHER); + if (!term->no_remote_charset) + term->cset_attr[1] = CSET_SCOACS; + break; + /* DOCS: Designate other coding system */ + case ANSI('8', '%'): /* Old Linux code */ + case ANSI('G', '%'): + compatibility(OTHER); + if (!term->no_remote_charset) + term->utf = true; + break; + case ANSI('@', '%'): + compatibility(OTHER); + if (!term->no_remote_charset) + term->utf = false; + break; + } + break; + case SEEN_CSI: + term->termstate = TOPLEVEL; /* default */ + if (isdigit(c)) { + if (term->esc_nargs <= ARGS_MAX) { + if (term->esc_args[term->esc_nargs - 1] == ARG_DEFAULT) + term->esc_args[term->esc_nargs - 1] = 0; + if (term->esc_args[term->esc_nargs - 1] <= + UINT_MAX / 10 && + term->esc_args[term->esc_nargs - 1] * 10 <= + UINT_MAX - c - '0') + term->esc_args[term->esc_nargs - 1] = + 10 * term->esc_args[term->esc_nargs - 1] + + c - '0'; + else + term->esc_args[term->esc_nargs - 1] = UINT_MAX; + } + term->termstate = SEEN_CSI; + } else if (c == ';') { + if (term->esc_nargs < ARGS_MAX) + term->esc_args[term->esc_nargs++] = ARG_DEFAULT; + term->termstate = SEEN_CSI; + } else if (c < '@') { + if (term->esc_query) + term->esc_query = -1; + else if (c == '?') + term->esc_query = 1; + else + term->esc_query = c; + term->termstate = SEEN_CSI; + } else +#define CLAMP(arg, lim) ((arg) = ((arg) > (lim)) ? (lim) : (arg)) + switch (ANSI(c, term->esc_query)) { + case 'A': /* CUU: move up N lines */ + CLAMP(term->esc_args[0], term->rows); + move(term, term->curs.x, + term->curs.y - def(term->esc_args[0], 1), 1); + seen_disp_event(term); + break; + case 'e': /* VPR: move down N lines */ + compatibility(ANSI); + /* FALLTHROUGH */ + case 'B': /* CUD: Cursor down */ + CLAMP(term->esc_args[0], term->rows); + move(term, term->curs.x, + term->curs.y + def(term->esc_args[0], 1), 1); + seen_disp_event(term); + break; + case 'b': /* REP: repeat previous grap */ + CLAMP(term->esc_args[0], term->rows * term->cols); + if (term->last_graphic_char) { + unsigned i; + for (i = 0; i < term->esc_args[0]; i++) + term_display_graphic_char( + term, term->last_graphic_char); + } + break; + case ANSI('c', '>'): /* DA: report xterm version */ + compatibility(OTHER); + /* this reports xterm version 136 so that VIM can + use the drag messages from the mouse reporting */ + if (term->ldisc) + ldisc_send(term->ldisc, "\033[>0;136;0c", 11, + false); + break; + case 'a': /* HPR: move right N cols */ + compatibility(ANSI); + /* FALLTHROUGH */ + case 'C': /* CUF: Cursor right */ + CLAMP(term->esc_args[0], term->cols); + move(term, term->curs.x + def(term->esc_args[0], 1), + term->curs.y, 1); + seen_disp_event(term); + break; + case 'D': /* CUB: move left N cols */ + CLAMP(term->esc_args[0], term->cols); + move(term, term->curs.x - def(term->esc_args[0], 1), + term->curs.y, 1); + seen_disp_event(term); + break; + case 'E': /* CNL: move down N lines and CR */ + compatibility(ANSI); + CLAMP(term->esc_args[0], term->rows); + move(term, 0, + term->curs.y + def(term->esc_args[0], 1), 1); + seen_disp_event(term); + break; + case 'F': /* CPL: move up N lines and CR */ + compatibility(ANSI); + CLAMP(term->esc_args[0], term->rows); + move(term, 0, + term->curs.y - def(term->esc_args[0], 1), 1); + seen_disp_event(term); + break; + case 'G': /* CHA */ + case '`': /* HPA: set horizontal posn */ + compatibility(ANSI); + CLAMP(term->esc_args[0], term->cols); + move(term, def(term->esc_args[0], 1) - 1, + term->curs.y, 0); + seen_disp_event(term); + break; + case 'd': /* VPA: set vertical posn */ + compatibility(ANSI); + CLAMP(term->esc_args[0], term->rows); + move(term, term->curs.x, + ((term->dec_om ? term->marg_t : 0) + + def(term->esc_args[0], 1) - 1), + (term->dec_om ? 2 : 0)); + seen_disp_event(term); + break; + case 'H': /* CUP */ + case 'f': /* HVP: set horz and vert posns at once */ + if (term->esc_nargs < 2) + term->esc_args[1] = ARG_DEFAULT; + CLAMP(term->esc_args[0], term->rows); + CLAMP(term->esc_args[1], term->cols); + move(term, def(term->esc_args[1], 1) - 1, + ((term->dec_om ? term->marg_t : 0) + + def(term->esc_args[0], 1) - 1), + (term->dec_om ? 2 : 0)); + seen_disp_event(term); + break; + case 'J': { /* ED: erase screen or parts of it */ + unsigned int i = def(term->esc_args[0], 0); + if (i == 3) { + /* Erase Saved Lines (xterm) + * This follows Thomas Dickey's xterm. */ + if (!term->no_remote_clearscroll) + term_clrsb(term); + } else { + i++; + if (i > 3) + i = 0; + erase_lots(term, false, !!(i & 2), !!(i & 1)); + } + if (term->scroll_on_disp) + term->disptop = 0; + seen_disp_event(term); + break; + } + case 'K': { /* EL: erase line or parts of it */ + unsigned int i = def(term->esc_args[0], 0) + 1; + if (i > 3) + i = 0; + erase_lots(term, true, !!(i & 2), !!(i & 1)); + seen_disp_event(term); + break; + } + case 'L': /* IL: insert lines */ + compatibility(VT102); + CLAMP(term->esc_args[0], term->rows); + if (term->curs.y <= term->marg_b) + scroll(term, term->curs.y, term->marg_b, + -def(term->esc_args[0], 1), false); + seen_disp_event(term); + break; + case 'M': /* DL: delete lines */ + compatibility(VT102); + CLAMP(term->esc_args[0], term->rows); + if (term->curs.y <= term->marg_b) + scroll(term, term->curs.y, term->marg_b, + def(term->esc_args[0], 1), + true); + seen_disp_event(term); + break; + case '@': /* ICH: insert chars */ + /* XXX VTTEST says this is vt220, vt510 manual says vt102 */ + compatibility(VT102); + CLAMP(term->esc_args[0], term->cols); + insch(term, def(term->esc_args[0], 1)); + seen_disp_event(term); + break; + case 'P': /* DCH: delete chars */ + compatibility(VT102); + CLAMP(term->esc_args[0], term->cols); + insch(term, -def(term->esc_args[0], 1)); + seen_disp_event(term); + break; + case 'c': /* DA: terminal type query */ + compatibility(VT100); + /* This is the response for a VT102 */ + if (term->ldisc) + ldisc_send(term->ldisc, term->id_string, + strlen(term->id_string), false); + break; + case 'n': /* DSR: cursor position query */ + if (term->ldisc) { + if (term->esc_args[0] == 6) { + char buf[32]; + sprintf(buf, "\033[%d;%dR", term->curs.y + 1, + term->curs.x + 1); + ldisc_send(term->ldisc, buf, strlen(buf), + false); + } else if (term->esc_args[0] == 5) { + ldisc_send(term->ldisc, "\033[0n", 4, false); + } + } + break; + case 'h': /* SM: toggle modes to high */ + case ANSI_QUE('h'): + compatibility(VT100); + for (int i = 0; i < term->esc_nargs; i++) + toggle_mode(term, term->esc_args[i], + term->esc_query, true); + break; + case 'i': /* MC: Media copy */ + case ANSI_QUE('i'): { + compatibility(VT100); + char *printer; + if (term->esc_nargs != 1) break; + if (term->esc_args[0] == 5 && + (printer = conf_get_str(term->conf, + CONF_printer))[0]) { + term->printing = true; + term->only_printing = !term->esc_query; + term->print_state = 0; + term_print_setup(term, printer); + } else if (term->esc_args[0] == 4 && + term->printing) { + term_print_finish(term); + } + break; + } + case 'l': /* RM: toggle modes to low */ + case ANSI_QUE('l'): + compatibility(VT100); + for (int i = 0; i < term->esc_nargs; i++) + toggle_mode(term, term->esc_args[i], + term->esc_query, false); + break; + case 'g': /* TBC: clear tabs */ + compatibility(VT100); + if (term->esc_nargs == 1) { + if (term->esc_args[0] == 0) { + term->tabs[term->curs.x] = false; + } else if (term->esc_args[0] == 3) { + int i; + for (i = 0; i < term->cols; i++) + term->tabs[i] = false; + } + } + break; + case 'r': /* DECSTBM: set scroll margins */ + compatibility(VT100); + if (term->esc_nargs <= 2) { + int top, bot; + CLAMP(term->esc_args[0], term->rows); + CLAMP(term->esc_args[1], term->rows); + top = def(term->esc_args[0], 1) - 1; + bot = (term->esc_nargs <= 1 + || term->esc_args[1] == 0 ? + term->rows : + def(term->esc_args[1], term->rows)) - 1; + if (bot >= term->rows) + bot = term->rows - 1; + /* VTTEST Bug 9 - if region is less than 2 lines + * don't change region. + */ + if (bot - top > 0) { + term->marg_t = top; + term->marg_b = bot; + term->curs.x = 0; + /* + * I used to think the cursor should be + * placed at the top of the newly marginned + * area. Apparently not: VMS TPU falls over + * if so. + * + * Well actually it should for + * Origin mode - RDB + */ + term->curs.y = (term->dec_om ? + term->marg_t : 0); + seen_disp_event(term); + } + } + break; + case 'm': /* SGR: set graphics rendition */ + /* + * A VT100 without the AVO only had one + * attribute, either underline or reverse + * video depending on the cursor type, this + * was selected by CSI 7m. + * + * case 2: + * This is sometimes DIM, eg on the GIGI and + * Linux + * case 8: + * This is sometimes INVIS various ANSI. + * case 21: + * This like 22 disables BOLD, DIM and INVIS + * + * The ANSI colours appear on any terminal + * that has colour (obviously) but the + * interaction between sgr0 and the colours + * varies but is usually related to the + * background colour erase item. The + * interaction between colour attributes and + * the mono ones is also very implementation + * dependent. + * + * The 39 and 49 attributes are likely to be + * unimplemented. + */ + for (int i = 0; i < term->esc_nargs; i++) + switch (def(term->esc_args[i], 0)) { + case 0: /* restore defaults */ + term->curr_attr = term->default_attr; + term->curr_truecolour = + term->basic_erase_char.truecolour; + break; + case 1: /* enable bold */ + compatibility(VT100AVO); + term->curr_attr |= ATTR_BOLD; + break; + case 2: /* enable dim */ + compatibility(OTHER); + term->curr_attr |= ATTR_DIM; + break; + case 21: /* (enable double underline) */ + compatibility(OTHER); + case 4: /* enable underline */ + compatibility(VT100AVO); + term->curr_attr |= ATTR_UNDER; + break; + case 5: /* enable blink */ + compatibility(VT100AVO); + term->curr_attr |= ATTR_BLINK; + break; + case 6: /* SCO light bkgrd */ + compatibility(SCOANSI); + term->blink_is_real = false; + term->curr_attr |= ATTR_BLINK; + term_schedule_tblink(term); + break; + case 7: /* enable reverse video */ + term->curr_attr |= ATTR_REVERSE; + break; + case 9: /* enable strikethrough */ + term->curr_attr |= ATTR_STRIKE; + break; + case 10: /* SCO acs off */ + compatibility(SCOANSI); + if (term->no_remote_charset) break; + term->sco_acs = 0; break; + case 11: /* SCO acs on */ + compatibility(SCOANSI); + if (term->no_remote_charset) break; + term->sco_acs = 1; break; + case 12: /* SCO acs on, |0x80 */ + compatibility(SCOANSI); + if (term->no_remote_charset) break; + term->sco_acs = 2; break; + case 22: /* disable bold and dim */ + compatibility2(OTHER, VT220); + term->curr_attr &= ~(ATTR_BOLD | ATTR_DIM); + break; + case 24: /* disable underline */ + compatibility2(OTHER, VT220); + term->curr_attr &= ~ATTR_UNDER; + break; + case 25: /* disable blink */ + compatibility2(OTHER, VT220); + term->curr_attr &= ~ATTR_BLINK; + break; + case 27: /* disable reverse video */ + compatibility2(OTHER, VT220); + term->curr_attr &= ~ATTR_REVERSE; + break; + case 29: /* disable strikethrough */ + term->curr_attr &= ~ATTR_STRIKE; + break; + case 30: + case 31: + case 32: + case 33: + case 34: + case 35: + case 36: + case 37: + /* foreground */ + term->curr_truecolour.fg.enabled = false; + term->curr_attr &= ~ATTR_FGMASK; + term->curr_attr |= + (term->esc_args[i] - 30)<<ATTR_FGSHIFT; + break; + case 90: + case 91: + case 92: + case 93: + case 94: + case 95: + case 96: + case 97: + /* aixterm-style bright foreground */ + term->curr_truecolour.fg.enabled = false; + term->curr_attr &= ~ATTR_FGMASK; + term->curr_attr |= + ((term->esc_args[i] - 90 + 8) + << ATTR_FGSHIFT); + break; + case 39: /* default-foreground */ + term->curr_truecolour.fg.enabled = false; + term->curr_attr &= ~ATTR_FGMASK; + term->curr_attr |= ATTR_DEFFG; + break; + case 40: + case 41: + case 42: + case 43: + case 44: + case 45: + case 46: + case 47: + /* background */ + term->curr_truecolour.bg.enabled = false; + term->curr_attr &= ~ATTR_BGMASK; + term->curr_attr |= + (term->esc_args[i] - 40)<<ATTR_BGSHIFT; + break; + case 100: + case 101: + case 102: + case 103: + case 104: + case 105: + case 106: + case 107: + /* aixterm-style bright background */ + term->curr_truecolour.bg.enabled = false; + term->curr_attr &= ~ATTR_BGMASK; + term->curr_attr |= + ((term->esc_args[i] - 100 + 8) + << ATTR_BGSHIFT); + break; + case 49: /* default-background */ + term->curr_truecolour.bg.enabled = false; + term->curr_attr &= ~ATTR_BGMASK; + term->curr_attr |= ATTR_DEFBG; + break; + + /* + * 256-colour and true-colour + * sequences. A 256-colour + * foreground is selected by a + * sequence of 3 arguments in the + * form 38;5;n, where n is in the + * range 0-255. A true-colour RGB + * triple is selected by 5 args of + * the form 38;2;r;g;b. Replacing + * the initial 38 with 48 in both + * cases selects the same colour + * as the background. + */ + case 38: + if (i+2 < term->esc_nargs && + term->esc_args[i+1] == 5) { + term->curr_attr &= ~ATTR_FGMASK; + term->curr_attr |= + ((term->esc_args[i+2] & 0xFF) + << ATTR_FGSHIFT); + term->curr_truecolour.fg = + optionalrgb_none; + i += 2; + } + if (i + 4 < term->esc_nargs && + term->esc_args[i + 1] == 2) { + parse_optionalrgb( + &term->curr_truecolour.fg, + term->esc_args + (i+2)); + i += 4; + } + break; + case 48: + if (i+2 < term->esc_nargs && + term->esc_args[i+1] == 5) { + term->curr_attr &= ~ATTR_BGMASK; + term->curr_attr |= + ((term->esc_args[i+2] & 0xFF) + << ATTR_BGSHIFT); + term->curr_truecolour.bg = + optionalrgb_none; + i += 2; + } + if (i + 4 < term->esc_nargs && + term->esc_args[i+1] == 2) { + parse_optionalrgb( + &term->curr_truecolour.bg, + term->esc_args + (i+2)); + i += 4; + } + break; + } + set_erase_char(term); + break; + case 's': /* save cursor */ + save_cursor(term, true); + break; + case 'u': /* restore cursor */ + save_cursor(term, false); + seen_disp_event(term); + break; + case 't': /* DECSLPP: set page size - ie window height */ + /* + * VT340/VT420 sequence DECSLPP, DEC only allows values + * 24/25/36/48/72/144 other emulators (eg dtterm) use + * illegal values (eg first arg 1..9) for window changing + * and reports. + */ + if (term->esc_nargs <= 1 + && (term->esc_args[0] < 1 || + term->esc_args[0] >= 24)) { + compatibility(VT340TEXT); + if (!term->no_remote_resize) { + term->win_resize_pending = true; + term->win_resize_pending_w = term->cols; + term->win_resize_pending_h = + def(term->esc_args[0], 24); + term_schedule_update(term); + } + deselect(term); + } else if (term->esc_nargs >= 1 && + term->esc_args[0] >= 1 && + term->esc_args[0] < 24) { + compatibility(OTHER); + + switch (term->esc_args[0]) { + int len; + char buf[80]; + const char *p; + case 1: + term->win_minimise_pending = true; + term->win_minimise_enable = false; + term_schedule_update(term); + break; + case 2: + term->win_minimise_pending = true; + term->win_minimise_enable = true; + term_schedule_update(term); + break; + case 3: + if (term->esc_nargs >= 3) { + if (!term->no_remote_resize) { + term->win_move_pending = true; + term->win_move_pending_x = + def(term->esc_args[1], 0); + term->win_move_pending_y = + def(term->esc_args[2], 0); + term_schedule_update(term); + } + } + break; + case 4: + /* We should resize the window to a given + * size in pixels here, but currently our + * resizing code isn't healthy enough to + * manage it. */ + break; + case 5: + /* move to top */ + term->win_zorder_pending = true; + term->win_zorder_top = true; + term_schedule_update(term); + break; + case 6: + /* move to bottom */ + term->win_zorder_pending = true; + term->win_zorder_top = false; + term_schedule_update(term); + break; + case 7: + term->win_refresh_pending = true; + term_schedule_update(term); + break; + case 8: + if (term->esc_nargs >= 3 && + !term->no_remote_resize) { + term->win_resize_pending = true; + term->win_resize_pending_w = + def(term->esc_args[2], + term->conf_width); + term->win_resize_pending_h = + def(term->esc_args[1], + term->conf_height); + term_schedule_update(term); + } + break; + case 9: + if (term->esc_nargs >= 2) { + term->win_maximise_pending = true; + term->win_maximise_enable = + term->esc_args[1]; + term_schedule_update(term); + } + break; + case 11: + if (term->ldisc) + ldisc_send(term->ldisc, term->minimised ? + "\033[2t" : "\033[1t", 4, + false); + break; + case 13: + if (term->ldisc) { + len = sprintf(buf, "\033[3;%u;%ut", + term->winpos_x, + term->winpos_y); + ldisc_send(term->ldisc, buf, len, false); + } + break; + case 14: + if (term->ldisc) { + len = sprintf(buf, "\033[4;%u;%ut", + term->winpixsize_y, + term->winpixsize_x); + ldisc_send(term->ldisc, buf, len, false); + } + break; + case 18: + if (term->ldisc) { + len = sprintf(buf, "\033[8;%d;%dt", + term->rows, term->cols); + ldisc_send(term->ldisc, buf, len, false); + } + break; + case 19: + /* + * Hmmm. Strictly speaking we + * should return `the size of the + * screen in characters', but + * that's not easy: (a) window + * furniture being what it is it's + * hard to compute, and (b) in + * resize-font mode maximising the + * window wouldn't change the + * number of characters. *shrug*. I + * think we'll ignore it for the + * moment and see if anyone + * complains, and then ask them + * what they would like it to do. + */ + break; + case 20: + if (term->ldisc && + term->remote_qtitle_action != TITLE_NONE) { + if(term->remote_qtitle_action == TITLE_REAL) + p = term->icon_title; + else + p = EMPTY_WINDOW_TITLE; + len = strlen(p); + ldisc_send(term->ldisc, "\033]L", 3, + false); + ldisc_send(term->ldisc, p, len, false); + ldisc_send(term->ldisc, "\033\\", 2, + false); + } + break; + case 21: + if (term->ldisc && + term->remote_qtitle_action != TITLE_NONE) { + if(term->remote_qtitle_action == TITLE_REAL) + p = term->window_title; + else + p = EMPTY_WINDOW_TITLE; + len = strlen(p); + ldisc_send(term->ldisc, "\033]l", 3, + false); + ldisc_send(term->ldisc, p, len, false); + ldisc_send(term->ldisc, "\033\\", 2, + false); + } + break; + } + } + break; + case 'S': /* SU: Scroll up */ + CLAMP(term->esc_args[0], term->rows); + compatibility(SCOANSI); + scroll(term, term->marg_t, term->marg_b, + def(term->esc_args[0], 1), true); + term->wrapnext = false; + seen_disp_event(term); + break; + case 'T': /* SD: Scroll down */ + CLAMP(term->esc_args[0], term->rows); + compatibility(SCOANSI); + scroll(term, term->marg_t, term->marg_b, + -def(term->esc_args[0], 1), true); + term->wrapnext = false; + seen_disp_event(term); + break; + case ANSI('|', '*'): /* DECSNLS */ + /* + * Set number of lines on screen + * VT420 uses VGA like hardware and can + * support any size in reasonable range + * (24..49 AIUI) with no default specified. + */ + compatibility(VT420); + if (term->esc_nargs == 1 && term->esc_args[0] > 0) { + if (!term->no_remote_resize) { + term->win_resize_pending = true; + term->win_resize_pending_w = term->cols; + term->win_resize_pending_h = + def(term->esc_args[0], term->conf_height); + term_schedule_update(term); + } + deselect(term); + } + break; + case ANSI('|', '$'): /* DECSCPP */ + /* + * Set number of columns per page + * Docs imply range is only 80 or 132, but + * I'll allow any. + */ + compatibility(VT340TEXT); + if (term->esc_nargs <= 1) { + if (!term->no_remote_resize) { + term->win_resize_pending = true; + term->win_resize_pending_w = + def(term->esc_args[0], term->conf_width); + term->win_resize_pending_h = term->rows; + term_schedule_update(term); + } + deselect(term); + } + break; + case 'X': { /* ECH: write N spaces w/o moving cursor */ + /* XXX VTTEST says this is vt220, vt510 manual + * says vt100 */ + compatibility(ANSIMIN); + CLAMP(term->esc_args[0], term->cols); + int n = def(term->esc_args[0], 1); + pos cursplus; + int p = term->curs.x; + termline *cline = scrlineptr(term->curs.y); + + check_trust_status(term, cline); + if (n > term->cols - term->curs.x) + n = term->cols - term->curs.x; + cursplus = term->curs; + cursplus.x += n; + check_boundary(term, term->curs.x, term->curs.y); + check_boundary(term, term->curs.x+n, term->curs.y); + check_selection(term, term->curs, cursplus); + while (n--) + copy_termchar(cline, p++, + &term->erase_char); + seen_disp_event(term); + break; + } + case 'x': /* DECREQTPARM: report terminal characteristics */ + compatibility(VT100); + if (term->ldisc) { + char buf[32]; + int i = def(term->esc_args[0], 0); + if (i == 0 || i == 1) { + strcpy(buf, "\033[2;1;1;112;112;1;0x"); + buf[2] += i; + ldisc_send(term->ldisc, buf, 20, false); + } + } + break; + case 'Z': { /* CBT */ + compatibility(OTHER); + CLAMP(term->esc_args[0], term->cols); + int i = def(term->esc_args[0], 1); + pos old_curs = term->curs; + + for(;i>0 && term->curs.x>0; i--) { + do { + term->curs.x--; + } while (term->curs.x >0 && + !term->tabs[term->curs.x]); + } + check_selection(term, old_curs, term->curs); + break; + } + case ANSI('c', '='): /* Hide or Show Cursor */ + compatibility(SCOANSI); + switch(term->esc_args[0]) { + case 0: /* hide cursor */ + term->cursor_on = false; + break; + case 1: /* restore cursor */ + term->big_cursor = false; + term->cursor_on = true; + break; + case 2: /* block cursor */ + term->big_cursor = true; + term->cursor_on = true; + break; + } + break; + case ANSI('C', '='): + /* + * set cursor start on scanline esc_args[0] and + * end on scanline esc_args[1].If you set + * the bottom scan line to a value less than + * the top scan line, the cursor will disappear. + */ + compatibility(SCOANSI); + if (term->esc_nargs >= 2) { + if (term->esc_args[0] > term->esc_args[1]) + term->cursor_on = false; + else + term->cursor_on = true; + } + break; + case ANSI('D', '='): + compatibility(SCOANSI); + term->blink_is_real = false; + term_schedule_tblink(term); + if (term->esc_args[0]>=1) + term->curr_attr |= ATTR_BLINK; + else + term->curr_attr &= ~ATTR_BLINK; + break; + case ANSI('E', '='): + compatibility(SCOANSI); + term->blink_is_real = (term->esc_args[0] >= 1); + term_schedule_tblink(term); + break; + case ANSI('F', '='): /* set normal foreground */ + compatibility(SCOANSI); + if (term->esc_args[0] < 16) { + long colour = + (sco2ansicolour[term->esc_args[0] & 0x7] | + (term->esc_args[0] & 0x8)) << + ATTR_FGSHIFT; + term->curr_attr &= ~ATTR_FGMASK; + term->curr_attr |= colour; + term->curr_truecolour.fg = optionalrgb_none; + term->default_attr &= ~ATTR_FGMASK; + term->default_attr |= colour; + set_erase_char(term); + } + break; + case ANSI('G', '='): /* set normal background */ + compatibility(SCOANSI); + if (term->esc_args[0] < 16) { + long colour = + (sco2ansicolour[term->esc_args[0] & 0x7] | + (term->esc_args[0] & 0x8)) << + ATTR_BGSHIFT; + term->curr_attr &= ~ATTR_BGMASK; + term->curr_attr |= colour; + term->curr_truecolour.bg = optionalrgb_none; + term->default_attr &= ~ATTR_BGMASK; + term->default_attr |= colour; + set_erase_char(term); + } + break; + case ANSI('L', '='): + compatibility(SCOANSI); + term->use_bce = (term->esc_args[0] <= 0); + set_erase_char(term); + break; + case ANSI('p', '"'): /* DECSCL: set compat level */ + /* + * Allow the host to make this emulator a + * 'perfect' VT102. This first appeared in + * the VT220, but we do need to get back to + * PuTTY mode so I won't check it. + * + * The arg in 40..42,50 are a PuTTY extension. + * The 2nd arg, 8bit vs 7bit is not checked. + * + * Setting VT102 mode should also change + * the Fkeys to generate PF* codes as a + * real VT102 has no Fkeys. The VT220 does + * this, F11..F13 become ESC,BS,LF other + * Fkeys send nothing. + * + * Note ESC c will NOT change this! + */ + + switch (term->esc_args[0]) { + case 61: + term->compatibility_level &= ~TM_VTXXX; + term->compatibility_level |= TM_VT102; + break; + case 62: + term->compatibility_level &= ~TM_VTXXX; + term->compatibility_level |= TM_VT220; + break; + + default: + if (term->esc_args[0] > 60 && + term->esc_args[0] < 70) + term->compatibility_level |= TM_VTXXX; + break; + + case 40: + term->compatibility_level &= TM_VTXXX; + break; + case 41: + term->compatibility_level = TM_PUTTY; + break; + case 42: + term->compatibility_level = TM_SCOANSI; + break; + + case ARG_DEFAULT: + term->compatibility_level = TM_PUTTY; + break; + case 50: + break; + } + + /* Change the response to CSI c */ + if (term->esc_args[0] == 50) { + int i; + char lbuf[64]; + strcpy(term->id_string, "\033[?"); + for (i = 1; i < term->esc_nargs; i++) { + if (i != 1) + strcat(term->id_string, ";"); + sprintf(lbuf, "%u", term->esc_args[i]); + strcat(term->id_string, lbuf); + } + strcat(term->id_string, "c"); + } +#if 0 + /* Is this a good idea ? + * Well we should do a soft reset at this point ... + */ + if (!has_compat(VT420) && has_compat(VT100)) { + if (!term->no_remote_resize) { + term->win_resize_pending = true; + term->win_resize_pending_w = + term->reset_132 ? 132 : 80; + term->win_resize_pending_h = 24; + term_schedule_update(term); + } + } +#endif + break; + } + break; + case SEEN_OSC: + term->osc_w = false; + switch (c) { + case 'P': /* Linux palette sequence */ + term->termstate = SEEN_OSC_P; + term->osc_strlen = 0; + break; + case 'R': /* Linux palette reset */ + palette_reset(term, false); + term_invalidate(term); + term->termstate = TOPLEVEL; + break; + case 'W': /* word-set */ + term->termstate = SEEN_OSC_W; + term->osc_w = true; + break; + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + if (term->esc_args[term->esc_nargs-1] <= UINT_MAX / 10 && + term->esc_args[term->esc_nargs-1] * 10 <= UINT_MAX - c - '0') + term->esc_args[term->esc_nargs-1] = + 10 * term->esc_args[term->esc_nargs-1] + c - '0'; + else + term->esc_args[term->esc_nargs-1] = UINT_MAX; + break; + default: + /* + * _Most_ other characters here terminate the + * immediate parsing of the OSC sequence and go + * into OSC_STRING state, but we deal with a + * couple of exceptions first. + */ + if (c == 'L' && term->esc_args[0] == 2) { + /* + * Grotty hack to support xterm and DECterm title + * sequences concurrently. + */ + term->esc_args[0] = 1; + } else if (c == ';' && term->esc_nargs == 1 && + term->esc_args[0] == 4) { + /* + * xterm's OSC 4 sequence to query the current + * RGB value of a colour takes a second + * numeric argument which is easiest to parse + * using the existing system rather than in + * do_osc. + */ + term->esc_args[term->esc_nargs++] = 0; + } else { + term->termstate = OSC_STRING; + term->osc_strlen = 0; + } + } + break; + case OSC_STRING: + /* + * This OSC stuff is EVIL. It takes just one character to get into + * sysline mode and it's not initially obvious how to get out. + * So I've added CR and LF as string aborts. + * This shouldn't effect compatibility as I believe embedded + * control characters are supposed to be interpreted (maybe?) + * and they don't display anything useful anyway. + * + * -- RDB + */ + if (c == '\012' || c == '\015') { + term->termstate = TOPLEVEL; + } else if (c == 0234 || c == '\007') { + /* + * These characters terminate the string; ST and BEL + * terminate the sequence and trigger instant + * processing of it, whereas ESC goes back to SEEN_ESC + * mode unless it is followed by \, in which case it is + * synonymous with ST in the first place. + */ + do_osc(term); + term->termstate = TOPLEVEL; + } else if (c == '\033') + term->termstate = OSC_MAYBE_ST; + else if (term->osc_strlen < OSC_STR_MAX) + term->osc_string[term->osc_strlen++] = (char)c; + break; + case SEEN_OSC_P: { + int max = (term->osc_strlen == 0 ? 21 : 15); + int val; + if ((int)c >= '0' && (int)c <= '9') + val = c - '0'; + else if ((int)c >= 'A' && (int)c <= 'A' + max - 10) + val = c - 'A' + 10; + else if ((int)c >= 'a' && (int)c <= 'a' + max - 10) + val = c - 'a' + 10; + else { + term->termstate = TOPLEVEL; + break; + } + term->osc_string[term->osc_strlen++] = val; + if (term->osc_strlen >= 7) { + unsigned oscp_index = term->osc_string[0]; + assert(oscp_index < OSCP_NCOLOURS); + unsigned osc4_index = + colour_indices_oscp_to_osc4[oscp_index]; + + rgb *value = &term->subpalettes[SUBPAL_SESSION].values[ + osc4_index]; + value->r = term->osc_string[1] * 16 + term->osc_string[2]; + value->g = term->osc_string[3] * 16 + term->osc_string[4]; + value->b = term->osc_string[5] * 16 + term->osc_string[6]; + term->subpalettes[SUBPAL_SESSION].present[ + osc4_index] = true; + + palette_rebuild(term); + + term->termstate = TOPLEVEL; + } + break; + } + case SEEN_OSC_W: + switch (c) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + if (term->esc_args[0] <= UINT_MAX / 10 && + term->esc_args[0] * 10 <= UINT_MAX - c - '0') + term->esc_args[0] = 10 * term->esc_args[0] + c - '0'; + else + term->esc_args[0] = UINT_MAX; + break; + default: + term->termstate = OSC_STRING; + term->osc_strlen = 0; + } + break; + case VT52_ESC: + term->termstate = TOPLEVEL; + seen_disp_event(term); + switch (c) { + case 'A': + move(term, term->curs.x, term->curs.y - 1, 1); + break; + case 'B': + move(term, term->curs.x, term->curs.y + 1, 1); + break; + case 'C': + move(term, term->curs.x + 1, term->curs.y, 1); + break; + case 'D': + move(term, term->curs.x - 1, term->curs.y, 1); + break; + /* + * From the VT100 Manual + * NOTE: The special graphics characters in the VT100 + * are different from those in the VT52 + * + * From VT102 manual: + * 137 _ Blank - Same + * 140 ` Reserved - Humm. + * 141 a Solid rectangle - Similar + * 142 b 1/ - Top half of fraction for the + * 143 c 3/ - subscript numbers below. + * 144 d 5/ + * 145 e 7/ + * 146 f Degrees - Same + * 147 g Plus or minus - Same + * 150 h Right arrow + * 151 i Ellipsis (dots) + * 152 j Divide by + * 153 k Down arrow + * 154 l Bar at scan 0 + * 155 m Bar at scan 1 + * 156 n Bar at scan 2 + * 157 o Bar at scan 3 - Similar + * 160 p Bar at scan 4 - Similar + * 161 q Bar at scan 5 - Similar + * 162 r Bar at scan 6 - Same + * 163 s Bar at scan 7 - Similar + * 164 t Subscript 0 + * 165 u Subscript 1 + * 166 v Subscript 2 + * 167 w Subscript 3 + * 170 x Subscript 4 + * 171 y Subscript 5 + * 172 z Subscript 6 + * 173 { Subscript 7 + * 174 | Subscript 8 + * 175 } Subscript 9 + * 176 ~ Paragraph + * + */ + case 'F': + term->cset_attr[term->cset = 0] = CSET_LINEDRW; + break; + case 'G': + term->cset_attr[term->cset = 0] = CSET_ASCII; + break; + case 'H': + move(term, 0, 0, 0); + break; + case 'I': + if (term->curs.y == 0) + scroll(term, 0, term->rows - 1, -1, true); + else if (term->curs.y > 0) + term->curs.y--; + term->wrapnext = false; + break; + case 'J': + erase_lots(term, false, false, true); + if (term->scroll_on_disp) + term->disptop = 0; + break; + case 'K': + erase_lots(term, true, false, true); + break; +#if 0 + case 'V': + /* XXX Print cursor line */ + break; + case 'W': + /* XXX Start controller mode */ + break; + case 'X': + /* XXX Stop controller mode */ + break; +#endif + case 'Y': + term->termstate = VT52_Y1; + break; + case 'Z': + if (term->ldisc) + ldisc_send(term->ldisc, "\033/Z", 3, false); + break; + case '=': + term->app_keypad_keys = true; + break; + case '>': + term->app_keypad_keys = false; + break; + case '<': + /* XXX This should switch to VT100 mode not current or default + * VT mode. But this will only have effect in a VT220+ + * emulation. + */ + term->vt52_mode = false; + term->blink_is_real = term->blinktext; + term_schedule_tblink(term); + break; +#if 0 + case '^': + /* XXX Enter auto print mode */ + break; + case '_': + /* XXX Exit auto print mode */ + break; + case ']': + /* XXX Print screen */ + break; +#endif + +#ifdef VT52_PLUS + case 'E': + /* compatibility(ATARI) */ + move(term, 0, 0, 0); + erase_lots(term, false, false, true); + if (term->scroll_on_disp) + term->disptop = 0; + break; + case 'L': + /* compatibility(ATARI) */ + if (term->curs.y <= term->marg_b) + scroll(term, term->curs.y, term->marg_b, -1, false); + break; + case 'M': + /* compatibility(ATARI) */ + if (term->curs.y <= term->marg_b) + scroll(term, term->curs.y, term->marg_b, 1, true); + break; + case 'b': + /* compatibility(ATARI) */ + term->termstate = VT52_FG; + break; + case 'c': + /* compatibility(ATARI) */ + term->termstate = VT52_BG; + break; + case 'd': + /* compatibility(ATARI) */ + erase_lots(term, false, true, false); + if (term->scroll_on_disp) + term->disptop = 0; + break; + case 'e': + /* compatibility(ATARI) */ + term->cursor_on = true; + break; + case 'f': + /* compatibility(ATARI) */ + term->cursor_on = false; + break; + /* case 'j': Save cursor position - broken on ST */ + /* case 'k': Restore cursor position */ + case 'l': + /* compatibility(ATARI) */ + erase_lots(term, true, true, true); + term->curs.x = 0; + term->wrapnext = false; + break; + case 'o': + /* compatibility(ATARI) */ + erase_lots(term, true, true, false); + break; + case 'p': + /* compatibility(ATARI) */ + term->curr_attr |= ATTR_REVERSE; + break; + case 'q': + /* compatibility(ATARI) */ + term->curr_attr &= ~ATTR_REVERSE; + break; + case 'v': /* wrap Autowrap on - Wyse style */ + /* compatibility(ATARI) */ + term->wrap = true; + break; + case 'w': /* Autowrap off */ + /* compatibility(ATARI) */ + term->wrap = false; + break; + + case 'R': + /* compatibility(OTHER) */ + term->vt52_bold = false; + term->curr_attr = ATTR_DEFAULT; + term->curr_truecolour.fg = optionalrgb_none; + term->curr_truecolour.bg = optionalrgb_none; + set_erase_char(term); + break; + case 'S': + /* compatibility(VI50) */ + term->curr_attr |= ATTR_UNDER; + break; + case 'W': + /* compatibility(VI50) */ + term->curr_attr &= ~ATTR_UNDER; + break; + case 'U': + /* compatibility(VI50) */ + term->vt52_bold = true; + term->curr_attr |= ATTR_BOLD; + break; + case 'T': + /* compatibility(VI50) */ + term->vt52_bold = false; + term->curr_attr &= ~ATTR_BOLD; + break; +#endif + } + break; + case VT52_Y1: + term->termstate = VT52_Y2; + move(term, term->curs.x, c - ' ', 0); + break; + case VT52_Y2: + term->termstate = TOPLEVEL; + move(term, c - ' ', term->curs.y, 0); + break; + +#ifdef VT52_PLUS + case VT52_FG: + term->termstate = TOPLEVEL; + term->curr_attr &= ~ATTR_FGMASK; + term->curr_attr &= ~ATTR_BOLD; + term->curr_attr |= (c & 0xF) << ATTR_FGSHIFT; + set_erase_char(term); + break; + case VT52_BG: + term->termstate = TOPLEVEL; + term->curr_attr &= ~ATTR_BGMASK; + term->curr_attr &= ~ATTR_BLINK; + term->curr_attr |= (c & 0xF) << ATTR_BGSHIFT; + set_erase_char(term); + break; +#endif + default: break; /* placate gcc warning about enum use */ + } + if (term->selstate != NO_SELECTION) { + pos cursplus = term->curs; + incpos(cursplus); + check_selection(term, term->curs, cursplus); + } + } + + term_print_flush(term); + if (term->logflush && term->logctx) + logflush(term->logctx); +} + +/* + * Small subroutine to parse three consecutive escape-sequence + * arguments representing a true-colour RGB triple into an + * optionalrgb. + */ +static void parse_optionalrgb(optionalrgb *out, unsigned *values) +{ + out->enabled = true; + out->r = values[0] < 256 ? values[0] : 0; + out->g = values[1] < 256 ? values[1] : 0; + out->b = values[2] < 256 ? values[2] : 0; +} + +/* + * To prevent having to run the reasonably tricky bidi algorithm + * too many times, we maintain a cache of the last lineful of data + * fed to the algorithm on each line of the display. + */ +static bool term_bidi_cache_hit(Terminal *term, int line, + termchar *lbefore, int width, bool trusted) +{ + int i; + + if (!term->pre_bidi_cache) + return false; /* cache doesn't even exist yet! */ + + if (line >= term->bidi_cache_size) + return false; /* cache doesn't have this many lines */ + + if (!term->pre_bidi_cache[line].chars) + return false; /* cache doesn't contain _this_ line */ + + if (term->pre_bidi_cache[line].width != width) + return false; /* line is wrong width */ + + if (term->pre_bidi_cache[line].trusted != trusted) + return false; /* line has wrong trust state */ + + for (i = 0; i < width; i++) + if (!termchars_equal(term->pre_bidi_cache[line].chars+i, lbefore+i)) + return false; /* line doesn't match cache */ + + return true; /* it didn't match. */ +} + +static void term_bidi_cache_store(Terminal *term, int line, termchar *lbefore, + termchar *lafter, bidi_char *wcTo, + int width, int size, bool trusted) +{ + size_t i, j; + + if (!term->pre_bidi_cache || term->bidi_cache_size <= line) { + j = term->bidi_cache_size; + sgrowarray(term->pre_bidi_cache, term->bidi_cache_size, line); + term->post_bidi_cache = sresize(term->post_bidi_cache, + term->bidi_cache_size, + struct bidi_cache_entry); + while (j < term->bidi_cache_size) { + term->pre_bidi_cache[j].chars = + term->post_bidi_cache[j].chars = NULL; + term->pre_bidi_cache[j].width = + term->post_bidi_cache[j].width = -1; + term->pre_bidi_cache[j].trusted = false; + term->post_bidi_cache[j].trusted = false; + term->pre_bidi_cache[j].forward = + term->post_bidi_cache[j].forward = NULL; + term->pre_bidi_cache[j].backward = + term->post_bidi_cache[j].backward = NULL; + j++; + } + } + + sfree(term->pre_bidi_cache[line].chars); + sfree(term->post_bidi_cache[line].chars); + sfree(term->post_bidi_cache[line].forward); + sfree(term->post_bidi_cache[line].backward); + + term->pre_bidi_cache[line].width = width; + term->pre_bidi_cache[line].trusted = trusted; + term->pre_bidi_cache[line].chars = snewn(size, termchar); + term->post_bidi_cache[line].width = width; + term->post_bidi_cache[line].trusted = trusted; + term->post_bidi_cache[line].chars = snewn(size, termchar); + term->post_bidi_cache[line].forward = snewn(width, int); + term->post_bidi_cache[line].backward = snewn(width, int); + + memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE); + memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE); + memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int)); + memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int)); + + for (i = j = 0; j < width; j += wcTo[i].nchars, i++) { + int p = wcTo[i].index; + + if (p != BIDI_CHAR_INDEX_NONE) { + assert(0 <= p && p < width); + + for (int x = 0; x < wcTo[i].nchars; x++) { + term->post_bidi_cache[line].backward[j+x] = p+x; + term->post_bidi_cache[line].forward[p+x] = j+x; + } + } + } +} + +/* + * Prepare the bidi information for a screen line. Returns the + * transformed list of termchars, or NULL if no transformation at + * all took place (because bidi is disabled). If return was + * non-NULL, auxiliary information such as the forward and reverse + * mappings of permutation position are available in + * term->post_bidi_cache[scr_y].*. + */ +static termchar *term_bidi_line(Terminal *term, struct termline *ldata, + int scr_y) +{ + termchar *lchars; + int it; + + /* Do Arabic shaping and bidi. */ + if (!term->no_bidi || !term->no_arabicshaping || + (ldata->trusted && term->cols > TRUST_SIGIL_WIDTH)) { + + if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols, + ldata->trusted)) { + + if (term->wcFromTo_size < term->cols) { + term->wcFromTo_size = term->cols; + term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size, + bidi_char); + term->wcTo = sresize(term->wcTo, term->wcFromTo_size, + bidi_char); + } + + for(it=0; it<term->cols ; it++) + { + unsigned long uc = (ldata->chars[it].chr); + + switch (uc & CSET_MASK) { + case CSET_LINEDRW: + if (!term->rawcnp) { + uc = term->ucsdata->unitab_xterm[uc & 0xFF]; + break; + } + case CSET_ASCII: + uc = term->ucsdata->unitab_line[uc & 0xFF]; + break; + case CSET_SCOACS: + uc = term->ucsdata->unitab_scoacs[uc&0xFF]; + break; + } + switch (uc & CSET_MASK) { + case CSET_ACP: + uc = term->ucsdata->unitab_font[uc & 0xFF]; + break; + case CSET_OEMCP: + uc = term->ucsdata->unitab_oemcp[uc & 0xFF]; + break; + } + + term->wcFrom[it].origwc = term->wcFrom[it].wc = + (unsigned int)uc; + term->wcFrom[it].index = it; + term->wcFrom[it].nchars = 1; + } + + if (ldata->trusted && term->cols > TRUST_SIGIL_WIDTH) { + memmove( + term->wcFrom + TRUST_SIGIL_WIDTH, term->wcFrom, + (term->cols - TRUST_SIGIL_WIDTH) * sizeof(*term->wcFrom)); + for (it = 0; it < TRUST_SIGIL_WIDTH; it++) { + term->wcFrom[it].origwc = term->wcFrom[it].wc = + (it == 0 ? TRUST_SIGIL_CHAR : + it == 1 ? UCSWIDE : ' '); + term->wcFrom[it].index = BIDI_CHAR_INDEX_NONE; + term->wcFrom[it].nchars = 1; + } + } + + int nbc = 0; + for (it = 0; it < term->cols; it++) { + term->wcFrom[nbc] = term->wcFrom[it]; + if (it+1 < term->cols && term->wcFrom[it+1].wc == UCSWIDE) { + term->wcFrom[nbc].nchars++; + it++; + } + nbc++; + } + + if(!term->no_bidi) + do_bidi(term->wcFrom, nbc); + + if(!term->no_arabicshaping) { + do_shape(term->wcFrom, term->wcTo, nbc); + } else { + /* If we're not calling do_shape, we must copy the + * data into wcTo anyway, unchanged */ + memcpy(term->wcTo, term->wcFrom, nbc * sizeof(*term->wcTo)); + } + + if (term->ltemp_size < ldata->size) { + term->ltemp_size = ldata->size; + term->ltemp = sresize(term->ltemp, term->ltemp_size, + termchar); + } + + memcpy(term->ltemp, ldata->chars, ldata->size * TSIZE); + + int opos = 0; + for (it=0; it<nbc; it++) { + int ipos = term->wcTo[it].index; + for (int j = 0; j < term->wcTo[it].nchars; j++) { + if (ipos != BIDI_CHAR_INDEX_NONE) { + term->ltemp[opos] = ldata->chars[ipos]; + if (term->ltemp[opos].cc_next) + term->ltemp[opos].cc_next -= opos - ipos; + + if (j > 0) + term->ltemp[opos].chr = UCSWIDE; + else if (term->wcTo[it].origwc != term->wcTo[it].wc) + term->ltemp[opos].chr = term->wcTo[it].wc; + } else { + term->ltemp[opos] = term->basic_erase_char; + term->ltemp[opos].chr = + j > 0 ? UCSWIDE : term->wcTo[it].origwc; + } + opos++; + } + } + assert(opos == term->cols); + term_bidi_cache_store(term, scr_y, ldata->chars, + term->ltemp, term->wcTo, + term->cols, ldata->size, ldata->trusted); + + lchars = term->ltemp; + } else { + lchars = term->post_bidi_cache[scr_y].chars; + } + } else { + lchars = NULL; + } + + return lchars; +} + +static void do_paint_draw(Terminal *term, termline *ldata, int x, int y, + wchar_t *ch, int ccount, + unsigned long attr, truecolour tc) +{ + if (ch[0] == TRUST_SIGIL_CHAR) { + assert(ldata->trusted); + assert(ccount == 1); + assert(attr & ATTR_WIDE); + wchar_t tch[2]; + tch[0] = tch[1] = L' '; + win_draw_text(term->win, x, y, tch, 2, term->basic_erase_char.attr, + ldata->lattr, term->basic_erase_char.truecolour); + win_draw_trust_sigil(term->win, x, y); + } else { + win_draw_text(term->win, x, y, ch, ccount, attr, ldata->lattr, tc); + if (attr & (TATTR_ACTCURS | TATTR_PASCURS)) + win_draw_cursor(term->win, x, y, ch, ccount, + attr, ldata->lattr, tc); + } +} + +/* + * Given a context, update the window. + */ +static void do_paint(Terminal *term) +{ + int i, j, our_curs_y, our_curs_x; + int rv, cursor; + pos scrpos; + wchar_t *ch; + size_t chlen; + termchar *newline; + + chlen = 1024; + ch = snewn(chlen, wchar_t); + + newline = snewn(term->cols, termchar); + + rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0); + + /* Depends on: + * screen array, disptop, scrtop, + * selection, rv, + * blinkpc, blink_is_real, tblinker, + * curs.y, curs.x, cblinker, blink_cur, cursor_on, has_focus, wrapnext + */ + + /* Has the cursor position or type changed ? */ + if (term->cursor_on) { + if (term->has_focus) { + if (term->cblinker || !term->blink_cur) + cursor = TATTR_ACTCURS; + else + cursor = 0; + } else + cursor = TATTR_PASCURS; + if (term->wrapnext) + cursor |= TATTR_RIGHTCURS; + } else + cursor = 0; + our_curs_y = term->curs.y - term->disptop; + { + /* + * Adjust the cursor position: + * - for bidi + * - in the case where it's resting on the right-hand half + * of a CJK wide character. xterm's behaviour here, + * which seems adequate to me, is to display the cursor + * covering the _whole_ character, exactly as if it were + * one space to the left. + */ + termline *ldata = lineptr(term->curs.y); + termchar *lchars; + + our_curs_x = term->curs.x; + + if ( (lchars = term_bidi_line(term, ldata, our_curs_y)) != NULL) { + our_curs_x = term->post_bidi_cache[our_curs_y].forward[our_curs_x]; + } else + lchars = ldata->chars; + + if (our_curs_x > 0 && + lchars[our_curs_x].chr == UCSWIDE) + our_curs_x--; + + unlineptr(ldata); + } + + /* + * If the cursor is not where it was last time we painted, and + * its previous position is visible on screen, invalidate its + * previous position. + */ + if (term->dispcursy >= 0 && + (term->curstype != cursor || + term->dispcursy != our_curs_y || + term->dispcursx != our_curs_x)) { + termchar *dispcurs = term->disptext[term->dispcursy]->chars + + term->dispcursx; + + if (term->dispcursx > 0 && dispcurs->chr == UCSWIDE) + dispcurs[-1].attr |= ATTR_INVALID; + if (term->dispcursx < term->cols-1 && dispcurs[1].chr == UCSWIDE) + dispcurs[1].attr |= ATTR_INVALID; + dispcurs->attr |= ATTR_INVALID; + + term->curstype = 0; + } + term->dispcursx = term->dispcursy = -1; + + /* The normal screen data */ + for (i = 0; i < term->rows; i++) { + termline *ldata; + termchar *lchars; + bool dirty_line, dirty_run, selected; + unsigned long attr = 0, cset = 0; + int start = 0; + int ccount = 0; + bool last_run_dirty = false; + int laststart; + bool dirtyrect; + int *backward; + truecolour tc; + + scrpos.y = i + term->disptop; + ldata = lineptr(scrpos.y); + + /* Do Arabic shaping and bidi. */ + lchars = term_bidi_line(term, ldata, i); + if (lchars) { + backward = term->post_bidi_cache[i].backward; + } else { + lchars = ldata->chars; + backward = NULL; + } + + /* + * First loop: work along the line deciding what we want + * each character cell to look like. + */ + for (j = 0; j < term->cols; j++) { + unsigned long tattr, tchar; + termchar *d = lchars + j; + scrpos.x = backward ? backward[j] : j; + + tchar = d->chr; + tattr = d->attr; + + if (!term->ansi_colour) + tattr = (tattr & ~(ATTR_FGMASK | ATTR_BGMASK)) | + ATTR_DEFFG | ATTR_DEFBG; + + if (!term->xterm_256_colour) { + int colour; + colour = (tattr & ATTR_FGMASK) >> ATTR_FGSHIFT; + if (colour >= 16 && colour < 256) + tattr = (tattr &~ ATTR_FGMASK) | ATTR_DEFFG; + colour = (tattr & ATTR_BGMASK) >> ATTR_BGSHIFT; + if (colour >= 16 && colour < 256) + tattr = (tattr &~ ATTR_BGMASK) | ATTR_DEFBG; + } + + if (term->true_colour) { + tc = d->truecolour; + } else { + tc.fg = tc.bg = optionalrgb_none; + } + + switch (tchar & CSET_MASK) { + case CSET_ASCII: + tchar = term->ucsdata->unitab_line[tchar & 0xFF]; + break; + case CSET_LINEDRW: + tchar = term->ucsdata->unitab_xterm[tchar & 0xFF]; + break; + case CSET_SCOACS: + tchar = term->ucsdata->unitab_scoacs[tchar&0xFF]; + break; + } + if (j < term->cols-1 && d[1].chr == UCSWIDE) + tattr |= ATTR_WIDE; + + /* Video reversing things */ + if (term->selstate == DRAGGING || term->selstate == SELECTED) { + if (term->seltype == LEXICOGRAPHIC) + selected = (posle(term->selstart, scrpos) && + poslt(scrpos, term->selend)); + else + selected = (posPle(term->selstart, scrpos) && + posPle_left(scrpos, term->selend)); + } else + selected = false; + tattr = (tattr ^ rv + ^ (selected ? ATTR_REVERSE : 0)); + + /* 'Real' blinking ? */ + if (term->blink_is_real && (tattr & ATTR_BLINK)) { + if (term->has_focus && term->tblinker) { + tchar = term->ucsdata->unitab_line[(unsigned char)' ']; + } + tattr &= ~ATTR_BLINK; + } + + /* + * Check the font we'll _probably_ be using to see if + * the character is wide when we don't want it to be. + */ + if (tchar != term->disptext[i]->chars[j].chr || + tattr != (term->disptext[i]->chars[j].attr &~ + (ATTR_NARROW | DATTR_MASK))) { + if ((tattr & ATTR_WIDE) == 0 && + win_char_width(term->win, tchar) == 2) + tattr |= ATTR_NARROW; + } else if (term->disptext[i]->chars[j].attr & ATTR_NARROW) + tattr |= ATTR_NARROW; + + if (i == our_curs_y && j == our_curs_x) { + tattr |= cursor; + term->curstype = cursor; + term->dispcursx = j; + term->dispcursy = i; + } + + /* FULL-TERMCHAR */ + newline[j].attr = tattr; + newline[j].chr = tchar; + newline[j].truecolour = tc; + /* Combining characters are still read from lchars */ + newline[j].cc_next = 0; + } + + /* + * Now loop over the line again, noting where things have + * changed. + * + * During this loop, we keep track of where we last saw + * DATTR_STARTRUN. Any mismatch automatically invalidates + * _all_ of the containing run that was last printed: that + * is, any rectangle that was drawn in one go in the + * previous update should be either left completely alone + * or overwritten in its entirety. This, along with the + * expectation that front ends clip all text runs to their + * bounding rectangle, should solve any possible problems + * with fonts that overflow their character cells. + */ + laststart = 0; + dirtyrect = false; + for (j = 0; j < term->cols; j++) { + if (term->disptext[i]->chars[j].attr & DATTR_STARTRUN) { + laststart = j; + dirtyrect = false; + } + + if (term->disptext[i]->chars[j].chr != newline[j].chr || + (term->disptext[i]->chars[j].attr &~ DATTR_MASK) + != newline[j].attr) { + int k; + + if (!dirtyrect) { + for (k = laststart; k < j; k++) + term->disptext[i]->chars[k].attr |= ATTR_INVALID; + + dirtyrect = true; + } + } + + if (dirtyrect) + term->disptext[i]->chars[j].attr |= ATTR_INVALID; + } + + /* + * Finally, loop once more and actually do the drawing. + */ + dirty_run = dirty_line = (ldata->lattr != + term->disptext[i]->lattr); + term->disptext[i]->lattr = ldata->lattr; + + tc = term->erase_char.truecolour; + for (j = 0; j < term->cols; j++) { + unsigned long tattr, tchar; + bool break_run, do_copy; + termchar *d = lchars + j; + + tattr = newline[j].attr; + tchar = newline[j].chr; + + if ((term->disptext[i]->chars[j].attr ^ tattr) & ATTR_WIDE) + dirty_line = true; + + break_run = ((tattr ^ attr) & term->attr_mask) != 0; + + if (!truecolour_equal(newline[j].truecolour, tc)) + break_run = true; + +#ifdef USES_VTLINE_HACK + /* Special hack for VT100 Linedraw glyphs */ + if ((tchar >= 0x23BA && tchar <= 0x23BD) || + (j > 0 && (newline[j-1].chr >= 0x23BA && + newline[j-1].chr <= 0x23BD))) + break_run = true; +#endif + + /* + * Separate out sequences of characters that have the + * same CSET, if that CSET is a magic one. + */ + if (CSET_OF(tchar) != cset) + break_run = true; + + /* + * Break on both sides of any combined-character cell. + */ + if (d->cc_next != 0 || + (j > 0 && d[-1].cc_next != 0)) + break_run = true; + + /* + * Break on both sides of a trust sigil. + */ + if (d->chr == TRUST_SIGIL_CHAR || + (j >= 2 && d[-1].chr == UCSWIDE && + d[-2].chr == TRUST_SIGIL_CHAR)) + break_run = true; + + if (!term->ucsdata->dbcs_screenfont && !dirty_line) { + if (term->disptext[i]->chars[j].chr == tchar && + (term->disptext[i]->chars[j].attr &~ DATTR_MASK)==tattr && + truecolour_equal( + term->disptext[i]->chars[j].truecolour, tc)) + break_run = true; + else if (!dirty_run && ccount == 1) + break_run = true; + } + + if (break_run) { + if ((dirty_run || last_run_dirty) && ccount > 0) + do_paint_draw(term, ldata, start, i, ch, ccount, attr, tc); + start = j; + ccount = 0; + attr = tattr; + tc = newline[j].truecolour; + cset = CSET_OF(tchar); + if (term->ucsdata->dbcs_screenfont) + last_run_dirty = dirty_run; + dirty_run = dirty_line; + } + + do_copy = false; + if (!termchars_equal_override(&term->disptext[i]->chars[j], + d, tchar, tattr)) { + do_copy = true; + dirty_run = true; + } + + sgrowarrayn(ch, chlen, ccount, 2); + +#ifdef PLATFORM_IS_UTF16 + if (tchar > 0x10000 && tchar < 0x110000) { + ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(tchar); + ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(tchar); + } else +#endif /* PLATFORM_IS_UTF16 */ + ch[ccount++] = (wchar_t) tchar; + + if (d->cc_next) { + termchar *dd = d; + + while (dd->cc_next) { + unsigned long schar; + + dd += dd->cc_next; + + schar = dd->chr; + switch (schar & CSET_MASK) { + case CSET_ASCII: + schar = term->ucsdata->unitab_line[schar & 0xFF]; + break; + case CSET_LINEDRW: + schar = term->ucsdata->unitab_xterm[schar & 0xFF]; + break; + case CSET_SCOACS: + schar = term->ucsdata->unitab_scoacs[schar&0xFF]; + break; + } + + sgrowarrayn(ch, chlen, ccount, 2); + +#ifdef PLATFORM_IS_UTF16 + if (schar > 0x10000 && schar < 0x110000) { + ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(schar); + ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(schar); + } else +#endif /* PLATFORM_IS_UTF16 */ + ch[ccount++] = (wchar_t) schar; + } + + attr |= TATTR_COMBINING; + } + + if (do_copy) { + copy_termchar(term->disptext[i], j, d); + term->disptext[i]->chars[j].chr = tchar; + term->disptext[i]->chars[j].attr = tattr; + term->disptext[i]->chars[j].truecolour = tc; + if (start == j) + term->disptext[i]->chars[j].attr |= DATTR_STARTRUN; + } + + /* If it's a wide char step along to the next one. */ + if (tattr & ATTR_WIDE) { + if (++j < term->cols) { + d++; + /* + * By construction above, the cursor should not + * be on the right-hand half of this character. + * Ever. + */ + assert(!(i == our_curs_y && j == our_curs_x)); + if (!termchars_equal(&term->disptext[i]->chars[j], d)) + dirty_run = true; + copy_termchar(term->disptext[i], j, d); + } + } + } + if (dirty_run && ccount > 0) + do_paint_draw(term, ldata, start, i, ch, ccount, attr, tc); + + unlineptr(ldata); + } + + sfree(newline); + sfree(ch); +} + +/* + * Invalidate the whole screen so it will be repainted in full. + */ +void term_invalidate(Terminal *term) +{ + int i, j; + + for (i = 0; i < term->rows; i++) + for (j = 0; j < term->cols; j++) + term->disptext[i]->chars[j].attr |= ATTR_INVALID; + + term_schedule_update(term); +} + +/* + * Paint the window in response to a WM_PAINT message. + */ +void term_paint(Terminal *term, + int left, int top, int right, int bottom, bool immediately) +{ + int i, j; + if (left < 0) left = 0; + if (top < 0) top = 0; + if (right >= term->cols) right = term->cols-1; + if (bottom >= term->rows) bottom = term->rows-1; + + for (i = top; i <= bottom && i < term->rows; i++) { + if ((term->disptext[i]->lattr & LATTR_MODE) == LATTR_NORM) + for (j = left; j <= right && j < term->cols; j++) + term->disptext[i]->chars[j].attr |= ATTR_INVALID; + else + for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++) + term->disptext[i]->chars[j].attr |= ATTR_INVALID; + } + + if (immediately) { + do_paint(term); + } else { + term_schedule_update(term); + } +} + +/* + * Attempt to scroll the scrollback. The second parameter gives the + * position we want to scroll to; the first is +1 to denote that + * this position is relative to the beginning of the scrollback, -1 + * to denote it is relative to the end, and 0 to denote that it is + * relative to the current position. + */ +void term_scroll(Terminal *term, int rel, int where) +{ + int sbtop = -sblines(term); + + term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where; + if (term->disptop < sbtop) + term->disptop = sbtop; + if (term->disptop > 0) + term->disptop = 0; + term->win_scrollbar_update_pending = true; + term_schedule_update(term); +} + +/* + * Scroll the scrollback to centre it on the beginning or end of the + * current selection, if any. + */ +void term_scroll_to_selection(Terminal *term, int which_end) +{ + pos target; + int y; + int sbtop = -sblines(term); + + if (term->selstate != SELECTED) + return; + if (which_end) + target = term->selend; + else + target = term->selstart; + + y = target.y - term->rows/2; + if (y < sbtop) + y = sbtop; + else if (y > 0) + y = 0; + term_scroll(term, -1, y); +} + +/* + * Helper routine for clipme(): growing buffer. + */ +typedef struct { + size_t bufsize; /* amount of allocated space in textbuf/attrbuf */ + size_t bufpos; /* amount of actual data */ + wchar_t *textbuf; /* buffer for copied text */ + wchar_t *textptr; /* = textbuf + bufpos (current insertion point) */ + int *attrbuf; /* buffer for copied attributes */ + int *attrptr; /* = attrbuf + bufpos */ + truecolour *tcbuf; /* buffer for copied colours */ + truecolour *tcptr; /* = tcbuf + bufpos */ +} clip_workbuf; + +static void clip_addchar(clip_workbuf *b, wchar_t chr, int attr, truecolour tc) +{ + if (b->bufpos >= b->bufsize) { + sgrowarray(b->textbuf, b->bufsize, b->bufpos); + b->textptr = b->textbuf + b->bufpos; + b->attrbuf = sresize(b->attrbuf, b->bufsize, int); + b->attrptr = b->attrbuf + b->bufpos; + b->tcbuf = sresize(b->tcbuf, b->bufsize, truecolour); + b->tcptr = b->tcbuf + b->bufpos; + } + *b->textptr++ = chr; + *b->attrptr++ = attr; + *b->tcptr++ = tc; + b->bufpos++; +} + +static void clipme(Terminal *term, pos top, pos bottom, bool rect, bool desel, + const int *clipboards, int n_clipboards) +{ + clip_workbuf buf; + int old_top_x; + int attr; + truecolour tc; + + buf.bufsize = 5120; + buf.bufpos = 0; + buf.textptr = buf.textbuf = snewn(buf.bufsize, wchar_t); + buf.attrptr = buf.attrbuf = snewn(buf.bufsize, int); + buf.tcptr = buf.tcbuf = snewn(buf.bufsize, truecolour); + + old_top_x = top.x; /* needed for rect==1 */ + + while (poslt(top, bottom)) { + bool nl = false; + termline *ldata = lineptr(top.y); + pos nlpos; + + /* + * nlpos will point at the maximum position on this line we + * should copy up to. So we start it at the end of the + * line... + */ + nlpos.y = top.y; + nlpos.x = term->cols; + + /* + * ... move it backwards if there's unused space at the end + * of the line (and also set `nl' if this is the case, + * because in normal selection mode this means we need a + * newline at the end)... + */ + if (!(ldata->lattr & LATTR_WRAPPED)) { + while (nlpos.x && + IS_SPACE_CHR(ldata->chars[nlpos.x - 1].chr) && + !ldata->chars[nlpos.x - 1].cc_next && + poslt(top, nlpos)) + decpos(nlpos); + if (poslt(nlpos, bottom)) + nl = true; + } else { + if (ldata->trusted) { + /* A wrapped line with a trust sigil on it terminates + * a few characters earlier. */ + nlpos.x = (nlpos.x < TRUST_SIGIL_WIDTH ? 0 : + nlpos.x - TRUST_SIGIL_WIDTH); + } + if (ldata->lattr & LATTR_WRAPPED2) { + /* Ignore the last char on the line in a WRAPPED2 line. */ + decpos(nlpos); + } + } + + /* + * ... and then clip it to the terminal x coordinate if + * we're doing rectangular selection. (In this case we + * still did the above, so that copying e.g. the right-hand + * column from a table doesn't fill with spaces on the + * right.) + */ + if (rect) { + if (nlpos.x > bottom.x) + nlpos.x = bottom.x; + nl = (top.y < bottom.y); + } + + while (poslt(top, bottom) && poslt(top, nlpos)) { +#if 0 + char cbuf[16], *p; + sprintf(cbuf, "<U+%04x>", (ldata[top.x] & 0xFFFF)); +#else + wchar_t cbuf[16], *p; + int c; + int x = top.x; + + if (ldata->chars[x].chr == UCSWIDE) { + top.x++; + continue; + } + + while (1) { + int uc = ldata->chars[x].chr; + attr = ldata->chars[x].attr; + tc = ldata->chars[x].truecolour; + + switch (uc & CSET_MASK) { + case CSET_LINEDRW: + if (!term->rawcnp) { + uc = term->ucsdata->unitab_xterm[uc & 0xFF]; + break; + } + case CSET_ASCII: + uc = term->ucsdata->unitab_line[uc & 0xFF]; + break; + case CSET_SCOACS: + uc = term->ucsdata->unitab_scoacs[uc&0xFF]; + break; + } + switch (uc & CSET_MASK) { + case CSET_ACP: + uc = term->ucsdata->unitab_font[uc & 0xFF]; + break; + case CSET_OEMCP: + uc = term->ucsdata->unitab_oemcp[uc & 0xFF]; + break; + } + + c = (uc & ~CSET_MASK); +#ifdef PLATFORM_IS_UTF16 + if (uc > 0x10000 && uc < 0x110000) { + cbuf[0] = 0xD800 | ((uc - 0x10000) >> 10); + cbuf[1] = 0xDC00 | ((uc - 0x10000) & 0x3FF); + cbuf[2] = 0; + } else +#endif + { + cbuf[0] = uc; + cbuf[1] = 0; + } + + if (DIRECT_FONT(uc)) { + if (c >= ' ' && c != 0x7F) { + char buf[4]; + WCHAR wbuf[4]; + int rv; + if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) { + buf[0] = c; + buf[1] = (char) (0xFF & ldata->chars[top.x + 1].chr); + rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4); + top.x++; + } else { + buf[0] = c; + rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4); + } + + if (rv > 0) { + memcpy(cbuf, wbuf, rv * sizeof(wchar_t)); + cbuf[rv] = 0; + } + } + } +#endif + + for (p = cbuf; *p; p++) + clip_addchar(&buf, *p, attr, tc); + + if (ldata->chars[x].cc_next) + x += ldata->chars[x].cc_next; + else + break; + } + top.x++; + } + if (nl) { + int i; + for (i = 0; i < sel_nl_sz; i++) + clip_addchar(&buf, sel_nl[i], 0, term->basic_erase_char.truecolour); + } + top.y++; + top.x = rect ? old_top_x : 0; + + unlineptr(ldata); + } +#if SELECTION_NUL_TERMINATED + clip_addchar(&buf, 0, 0, term->basic_erase_char.truecolour); +#endif + /* Finally, transfer all that to the clipboard(s). */ + { + int i; + bool clip_local = false; + for (i = 0; i < n_clipboards; i++) { + if (clipboards[i] == CLIP_LOCAL) { + clip_local = true; + } else if (clipboards[i] != CLIP_NULL) { + win_clip_write( + term->win, clipboards[i], buf.textbuf, buf.attrbuf, + buf.tcbuf, buf.bufpos, desel); + } + } + if (clip_local) { + sfree(term->last_selected_text); + sfree(term->last_selected_attr); + sfree(term->last_selected_tc); + term->last_selected_text = buf.textbuf; + term->last_selected_attr = buf.attrbuf; + term->last_selected_tc = buf.tcbuf; + term->last_selected_len = buf.bufpos; + } else { + sfree(buf.textbuf); + sfree(buf.attrbuf); + sfree(buf.tcbuf); + } + } +} + +void term_copyall(Terminal *term, const int *clipboards, int n_clipboards) +{ + pos top; + pos bottom; + tree234 *screen = term->screen; + top.y = -sblines(term); + top.x = 0; + bottom.y = find_last_nonempty_line(term, screen); + bottom.x = term->cols; + clipme(term, top, bottom, false, true, clipboards, n_clipboards); +} + +static void paste_from_clip_local(void *vterm) +{ + Terminal *term = (Terminal *)vterm; + term_do_paste(term, term->last_selected_text, term->last_selected_len); +} + +void term_request_copy(Terminal *term, const int *clipboards, int n_clipboards) +{ + int i; + for (i = 0; i < n_clipboards; i++) { + assert(clipboards[i] != CLIP_LOCAL); + if (clipboards[i] != CLIP_NULL) { + win_clip_write(term->win, clipboards[i], + term->last_selected_text, term->last_selected_attr, + term->last_selected_tc, term->last_selected_len, + false); + } + } +} + +void term_request_paste(Terminal *term, int clipboard) +{ + switch (clipboard) { + case CLIP_NULL: + /* Do nothing: CLIP_NULL never has data in it. */ + break; + case CLIP_LOCAL: + queue_toplevel_callback(paste_from_clip_local, term); + break; + default: + win_clip_request_paste(term->win, clipboard); + break; + } +} + +/* + * The wordness array is mainly for deciding the disposition of the + * US-ASCII characters. + */ +static int wordtype(Terminal *term, int uc) +{ + struct ucsword { + int start, end, ctype; + }; + static const struct ucsword ucs_words[] = { + { + 128, 160, 0}, { + 161, 191, 1}, { + 215, 215, 1}, { + 247, 247, 1}, { + 0x037e, 0x037e, 1}, /* Greek question mark */ + { + 0x0387, 0x0387, 1}, /* Greek ano teleia */ + { + 0x055a, 0x055f, 1}, /* Armenian punctuation */ + { + 0x0589, 0x0589, 1}, /* Armenian full stop */ + { + 0x0700, 0x070d, 1}, /* Syriac punctuation */ + { + 0x104a, 0x104f, 1}, /* Myanmar punctuation */ + { + 0x10fb, 0x10fb, 1}, /* Georgian punctuation */ + { + 0x1361, 0x1368, 1}, /* Ethiopic punctuation */ + { + 0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */ + { + 0x17d4, 0x17dc, 1}, /* Khmer punctuation */ + { + 0x1800, 0x180a, 1}, /* Mongolian punctuation */ + { + 0x2000, 0x200a, 0}, /* Various spaces */ + { + 0x2070, 0x207f, 2}, /* superscript */ + { + 0x2080, 0x208f, 2}, /* subscript */ + { + 0x200b, 0x27ff, 1}, /* punctuation and symbols */ + { + 0x3000, 0x3000, 0}, /* ideographic space */ + { + 0x3001, 0x3020, 1}, /* ideographic punctuation */ + { + 0x303f, 0x309f, 3}, /* Hiragana */ + { + 0x30a0, 0x30ff, 3}, /* Katakana */ + { + 0x3300, 0x9fff, 3}, /* CJK Ideographs */ + { + 0xac00, 0xd7a3, 3}, /* Hangul Syllables */ + { + 0xf900, 0xfaff, 3}, /* CJK Ideographs */ + { + 0xfe30, 0xfe6b, 1}, /* punctuation forms */ + { + 0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */ + { + 0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */ + { + 0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */ + { + 0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */ + { + 0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */ + { + 0, 0, 0} + }; + const struct ucsword *wptr; + + switch (uc & CSET_MASK) { + case CSET_LINEDRW: + uc = term->ucsdata->unitab_xterm[uc & 0xFF]; + break; + case CSET_ASCII: + uc = term->ucsdata->unitab_line[uc & 0xFF]; + break; + case CSET_SCOACS: + uc = term->ucsdata->unitab_scoacs[uc&0xFF]; + break; + } + switch (uc & CSET_MASK) { + case CSET_ACP: + uc = term->ucsdata->unitab_font[uc & 0xFF]; + break; + case CSET_OEMCP: + uc = term->ucsdata->unitab_oemcp[uc & 0xFF]; + break; + } + + /* For DBCS fonts I can't do anything useful. Even this will sometimes + * fail as there's such a thing as a double width space. :-( + */ + if (term->ucsdata->dbcs_screenfont && + term->ucsdata->font_codepage == term->ucsdata->line_codepage) + return (uc != ' '); + + if (uc < 0x80) + return term->wordness[uc]; + + for (wptr = ucs_words; wptr->start; wptr++) { + if (uc >= wptr->start && uc <= wptr->end) + return wptr->ctype; + } + + return 2; +} + +static int line_cols(Terminal *term, termline *ldata) +{ + int cols = term->cols; + if (ldata->trusted) { + cols -= TRUST_SIGIL_WIDTH; + } + if (ldata->lattr & LATTR_WRAPPED2) + cols--; + if (cols < 0) + cols = 0; + return cols; +} + +/* + * Spread the selection outwards according to the selection mode. + */ +static pos sel_spread_half(Terminal *term, pos p, int dir) +{ + termline *ldata; + short wvalue; + int topy = -sblines(term); + + ldata = lineptr(p.y); + + switch (term->selmode) { + case SM_CHAR: + /* + * In this mode, every character is a separate unit, except + * for runs of spaces at the end of a non-wrapping line. + */ + if (!(ldata->lattr & LATTR_WRAPPED)) { + termchar *q = ldata->chars + line_cols(term, ldata); + while (q > ldata->chars && + IS_SPACE_CHR(q[-1].chr) && !q[-1].cc_next) + q--; + if (q == ldata->chars + term->cols) + q--; + if (p.x >= q - ldata->chars) + p.x = (dir == -1 ? q - ldata->chars : term->cols - 1); + } + break; + case SM_WORD: + /* + * In this mode, the units are maximal runs of characters + * whose `wordness' has the same value. + */ + wvalue = wordtype(term, UCSGET(ldata->chars, p.x)); + if (dir == +1) { + while (1) { + int maxcols = line_cols(term, ldata); + if (p.x < maxcols-1) { + if (wordtype(term, UCSGET(ldata->chars, p.x+1)) == wvalue) + p.x++; + else + break; + } else { + if (p.y+1 < term->rows && + (ldata->lattr & LATTR_WRAPPED)) { + termline *ldata2; + ldata2 = lineptr(p.y+1); + if (wordtype(term, UCSGET(ldata2->chars, 0)) + == wvalue) { + p.x = 0; + p.y++; + unlineptr(ldata); + ldata = ldata2; + } else { + unlineptr(ldata2); + break; + } + } else + break; + } + } + } else { + while (1) { + if (p.x > 0) { + if (wordtype(term, UCSGET(ldata->chars, p.x-1)) == wvalue) + p.x--; + else + break; + } else { + termline *ldata2; + int maxcols; + if (p.y <= topy) + break; + ldata2 = lineptr(p.y-1); + maxcols = line_cols(term, ldata2); + if (ldata2->lattr & LATTR_WRAPPED) { + if (wordtype(term, UCSGET(ldata2->chars, maxcols-1)) + == wvalue) { + p.x = maxcols-1; + p.y--; + unlineptr(ldata); + ldata = ldata2; + } else { + unlineptr(ldata2); + break; + } + } else + break; + } + } + } + break; + case SM_LINE: + /* + * In this mode, every line is a unit. + */ + p.x = (dir == -1 ? 0 : term->cols - 1); + break; + } + + unlineptr(ldata); + return p; +} + +static void sel_spread(Terminal *term) +{ + if (term->seltype == LEXICOGRAPHIC) { + term->selstart = sel_spread_half(term, term->selstart, -1); + decpos(term->selend); + term->selend = sel_spread_half(term, term->selend, +1); + incpos(term->selend); + } +} + +static void term_paste_callback(void *vterm) +{ + Terminal *term = (Terminal *)vterm; + + if (term->paste_len == 0) + return; + + while (term->paste_pos < term->paste_len) { + int n = 0; + while (n + term->paste_pos < term->paste_len) { + if (term->paste_buffer[term->paste_pos + n++] == '\015') + break; + } + if (term->ldisc) { + strbuf *buf = term_input_data_from_unicode( + term, term->paste_buffer + term->paste_pos, n); + term_keyinput_internal(term, buf->s, buf->len, false); + strbuf_free(buf); + } + term->paste_pos += n; + + if (term->paste_pos < term->paste_len) { + queue_toplevel_callback(term_paste_callback, term); + return; + } + } + term_bracketed_paste_stop(term); + sfree(term->paste_buffer); + term->paste_buffer = NULL; + term->paste_len = 0; +} + +/* + * Specialist string compare function. Returns true if the buffer of + * alen wide characters starting at a has as a prefix the buffer of + * blen characters starting at b. + */ +static bool wstartswith(const wchar_t *a, size_t alen, + const wchar_t *b, size_t blen) +{ + return alen >= blen && !wcsncmp(a, b, blen); +} + +void term_do_paste(Terminal *term, const wchar_t *data, int len) +{ + const wchar_t *p; + bool paste_controls = conf_get_bool(term->conf, CONF_paste_controls); + + /* + * Pasting data into the terminal counts as a keyboard event (for + * purposes of the 'Reset scrollback on keypress' config option), + * unless the paste is zero-length. + */ + if (len == 0) + return; + term_seen_key_event(term); + + if (term->paste_buffer) + sfree(term->paste_buffer); + term->paste_pos = term->paste_len = 0; + term->paste_buffer = snewn(len + 12, wchar_t); + + if (term->bracketed_paste) + term_bracketed_paste_start(term); + + p = data; + while (p < data + len) { + wchar_t wc = *p++; + + if (wc == sel_nl[0] && + wstartswith(p-1, data+len-(p-1), sel_nl, sel_nl_sz)) { + /* + * This is the (platform-dependent) sequence that the host + * OS uses to represent newlines in clipboard data. + * Normalise it to a press of CR. + */ + p += sel_nl_sz - 1; + wc = '\015'; + } + + if ((wc & ~(wint_t)0x9F) == 0) { + /* + * This is a control code, either in the range 0x00-0x1F + * or 0x80-0x9F. We reject all of these in pastecontrols + * mode, except for a small set of permitted ones. + */ + if (!paste_controls) { + /* In line with xterm 292, accepted control chars are: + * CR, LF, tab, backspace. (And DEL, i.e. 0x7F, but + * that's permitted by virtue of not matching the bit + * mask that got us into this if statement, so we + * don't have to permit it here. */ + static const unsigned mask = + (1<<13) | (1<<10) | (1<<9) | (1<<8); + + if (wc > 15 || !((mask >> wc) & 1)) + continue; + } + + if (wc == '\033' && term->bracketed_paste && + wstartswith(p-1, data+len-(p-1), L"\033[201~", 6)) { + /* + * Also, in bracketed-paste mode, reject the ESC + * character that begins the end-of-paste sequence. + */ + continue; + } + } + + term->paste_buffer[term->paste_len++] = wc; + } + + /* Assume a small paste will be OK in one go. */ + if (term->paste_len < 256) { + if (term->ldisc) { + strbuf *buf = term_input_data_from_unicode( + term, term->paste_buffer, term->paste_len); + term_keyinput_internal(term, buf->s, buf->len, false); + strbuf_free(buf); + } + if (term->paste_buffer) + sfree(term->paste_buffer); + term_bracketed_paste_stop(term); + term->paste_buffer = NULL; + term->paste_pos = term->paste_len = 0; + } + + queue_toplevel_callback(term_paste_callback, term); +} + +void term_mouse(Terminal *term, Mouse_Button braw, Mouse_Button bcooked, + Mouse_Action a, int x, int y, bool shift, bool ctrl, bool alt) +{ + pos selpoint; + termline *ldata; + bool raw_mouse = (term->xterm_mouse && + !term->no_mouse_rep && + !(term->mouse_override && shift)); + int default_seltype; + + if (y < 0) { + y = 0; + if (a == MA_DRAG && !raw_mouse) + term_scroll(term, 0, -1); + } + if (y >= term->rows) { + y = term->rows - 1; + if (a == MA_DRAG && !raw_mouse) + term_scroll(term, 0, +1); + } + if (x < 0) { + if (y > 0 && !raw_mouse && term->seltype != RECTANGULAR) { + /* + * When we're using the mouse for normal raster-based + * selection, dragging off the left edge of a terminal row + * is treated the same as the right-hand end of the + * previous row, in that it's considered to identify a + * point _before_ the first character on row y. + * + * But if the mouse action is going to be used for + * anything else - rectangular selection, or xterm mouse + * tracking - then we disable this special treatment. + */ + x = term->cols - 1; + y--; + } else + x = 0; + } + if (x >= term->cols) + x = term->cols - 1; + + selpoint.y = y + term->disptop; + ldata = lineptr(selpoint.y); + + if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) + x /= 2; + + /* + * Transform x through the bidi algorithm to find the _logical_ + * click point from the physical one. + */ + if (term_bidi_line(term, ldata, y) != NULL) { + x = term->post_bidi_cache[y].backward[x]; + } + + selpoint.x = x; + unlineptr(ldata); + + /* + * If we're in the middle of a selection operation, we ignore raw + * mouse mode until it's done (we must have been not in raw mouse + * mode when it started). + * This makes use of Shift for selection reliable, and avoids the + * host seeing mouse releases for which they never saw corresponding + * presses. + */ + if (raw_mouse && + (term->selstate != ABOUT_TO) && (term->selstate != DRAGGING)) { + int encstate = 0, r, c; + bool wheel; + char abuf[32]; + int len = 0; + + if (term->ldisc) { + + switch (braw) { + case MBT_LEFT: + encstate = 0x00; /* left button down */ + wheel = false; + break; + case MBT_MIDDLE: + encstate = 0x01; + wheel = false; + break; + case MBT_RIGHT: + encstate = 0x02; + wheel = false; + break; + case MBT_WHEEL_UP: + encstate = 0x40; + wheel = true; + break; + case MBT_WHEEL_DOWN: + encstate = 0x41; + wheel = true; + break; + default: + return; + } + if (wheel) { + /* For mouse wheel buttons, we only ever expect to see + * MA_CLICK actions, and we don't try to keep track of + * the buttons being 'pressed' (since without matching + * click/release pairs that's pointless). */ + if (a != MA_CLICK) + return; + } else switch (a) { + case MA_DRAG: + if (term->xterm_mouse == 1) + return; + encstate += 0x20; + break; + case MA_RELEASE: + /* If multiple extensions are enabled, the xterm 1006 is used, so it's okay to check for only that */ + if (!term->xterm_extended_mouse) + encstate = 0x03; + term->mouse_is_down = 0; + break; + case MA_CLICK: + if (term->mouse_is_down == braw) + return; + term->mouse_is_down = braw; + break; + default: + return; + } + if (shift) + encstate += 0x04; + if (ctrl) + encstate += 0x10; + r = y + 1; + c = x + 1; + + /* Check the extensions in decreasing order of preference. Encoding the release event above assumes that 1006 comes first. */ + if (term->xterm_extended_mouse) { + len = sprintf(abuf, "\033[<%d;%d;%d%c", encstate, c, r, a == MA_RELEASE ? 'm' : 'M'); + } else if (term->urxvt_extended_mouse) { + len = sprintf(abuf, "\033[%d;%d;%dM", encstate + 32, c, r); + } else if (c <= 223 && r <= 223) { + len = sprintf(abuf, "\033[M%c%c%c", encstate + 32, c + 32, r + 32); + } + if (len > 0) + ldisc_send(term->ldisc, abuf, len, false); + } + return; + } + + /* + * Set the selection type (rectangular or normal) at the start + * of a selection attempt, from the state of Alt. + */ + if (!alt ^ !term->rect_select) + default_seltype = RECTANGULAR; + else + default_seltype = LEXICOGRAPHIC; + + if (term->selstate == NO_SELECTION) { + term->seltype = default_seltype; + } + + if (bcooked == MBT_SELECT && a == MA_CLICK) { + deselect(term); + term->selstate = ABOUT_TO; + term->seltype = default_seltype; + term->selanchor = selpoint; + term->selmode = SM_CHAR; + } else if (bcooked == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) { + deselect(term); + term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE); + term->selstate = DRAGGING; + term->selstart = term->selanchor = selpoint; + term->selend = term->selstart; + incpos(term->selend); + sel_spread(term); + } else if ((bcooked == MBT_SELECT && a == MA_DRAG) || + (bcooked == MBT_EXTEND && a != MA_RELEASE)) { + if (a == MA_DRAG && + (term->selstate == NO_SELECTION || term->selstate == SELECTED)) { + /* + * This can happen if a front end has passed us a MA_DRAG + * without a prior MA_CLICK. OS X GTK does so, for + * example, if the initial button press was eaten by the + * WM when it activated the window in the first place. The + * nicest thing to do in this situation is to ignore + * further drags, and wait for the user to click in the + * window again properly if they want to select. + */ + return; + } + if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint)) + return; + if (bcooked == MBT_EXTEND && a != MA_DRAG && + term->selstate == SELECTED) { + if (term->seltype == LEXICOGRAPHIC) { + /* + * For normal selection, we extend by moving + * whichever end of the current selection is closer + * to the mouse. + */ + if (posdiff(selpoint, term->selstart) < + posdiff(term->selend, term->selstart) / 2) { + term->selanchor = term->selend; + decpos(term->selanchor); + } else { + term->selanchor = term->selstart; + } + } else { + /* + * For rectangular selection, we have a choice of + * _four_ places to put selanchor and selpoint: the + * four corners of the selection. + */ + if (2*selpoint.x < term->selstart.x + term->selend.x) + term->selanchor.x = term->selend.x-1; + else + term->selanchor.x = term->selstart.x; + + if (2*selpoint.y < term->selstart.y + term->selend.y) + term->selanchor.y = term->selend.y; + else + term->selanchor.y = term->selstart.y; + } + term->selstate = DRAGGING; + } + if (term->selstate != ABOUT_TO && term->selstate != DRAGGING) + term->selanchor = selpoint; + term->selstate = DRAGGING; + if (term->seltype == LEXICOGRAPHIC) { + /* + * For normal selection, we set (selstart,selend) to + * (selpoint,selanchor) in some order. + */ + if (poslt(selpoint, term->selanchor)) { + term->selstart = selpoint; + term->selend = term->selanchor; + incpos(term->selend); + } else { + term->selstart = term->selanchor; + term->selend = selpoint; + incpos(term->selend); + } + } else { + /* + * For rectangular selection, we may need to + * interchange x and y coordinates (if the user has + * dragged in the -x and +y directions, or vice versa). + */ + term->selstart.x = min(term->selanchor.x, selpoint.x); + term->selend.x = 1+max(term->selanchor.x, selpoint.x); + term->selstart.y = min(term->selanchor.y, selpoint.y); + term->selend.y = max(term->selanchor.y, selpoint.y); + } + sel_spread(term); + } else if ((bcooked == MBT_SELECT || bcooked == MBT_EXTEND) && + a == MA_RELEASE) { + if (term->selstate == DRAGGING) { + /* + * We've completed a selection. We now transfer the + * data to the clipboard. + */ + clipme(term, term->selstart, term->selend, + (term->seltype == RECTANGULAR), false, + term->mouse_select_clipboards, + term->n_mouse_select_clipboards); + term->selstate = SELECTED; + } else + term->selstate = NO_SELECTION; + } else if (bcooked == MBT_PASTE + && (a == MA_CLICK +#if MULTICLICK_ONLY_EVENT + || a == MA_2CLK || a == MA_3CLK +#endif + )) { + term_request_paste(term, term->mouse_paste_clipboard); + } + + /* + * Since terminal output is suppressed during drag-selects, we + * should make sure to write any pending output if one has just + * finished. + */ + if (term->selstate != DRAGGING) + term_out(term); + term_schedule_update(term); +} + +int format_arrow_key(char *buf, Terminal *term, int xkey, bool ctrl) +{ + char *p = buf; + + if (term->vt52_mode) + p += sprintf(p, "\x1B%c", xkey); + else { + bool app_flg = (term->app_cursor_keys && !term->no_applic_c); +#if 0 + /* + * RDB: VT100 & VT102 manuals both state the app cursor + * keys only work if the app keypad is on. + * + * SGT: That may well be true, but xterm disagrees and so + * does at least one application, so I've #if'ed this out + * and the behaviour is back to PuTTY's original: app + * cursor and app keypad are independently switchable + * modes. If anyone complains about _this_ I'll have to + * put in a configurable option. + */ + if (!term->app_keypad_keys) + app_flg = 0; +#endif + /* Useful mapping of Ctrl-arrows */ + if (ctrl) + app_flg = !app_flg; + + if (app_flg) + p += sprintf(p, "\x1BO%c", xkey); + else + p += sprintf(p, "\x1B[%c", xkey); + } + + return p - buf; +} + +int format_function_key(char *buf, Terminal *term, int key_number, + bool shift, bool ctrl) +{ + char *p = buf; + + static const int key_number_to_tilde_code[] = { + -1, /* no such key as F0 */ + 11, 12, 13, 14, 15, /*gap*/ 17, 18, 19, 20, 21, /*gap*/ + 23, 24, 25, 26, /*gap*/ 28, 29, /*gap*/ 31, 32, 33, 34, + }; + + assert(key_number > 0); + assert(key_number < lenof(key_number_to_tilde_code)); + + int index = (shift && key_number <= 10) ? key_number + 10 : key_number; + int code = key_number_to_tilde_code[index]; + + if (term->funky_type == FUNKY_SCO) { + /* SCO function keys */ + static const char sco_codes[] = + "MNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@[\\]^_`{"; + index = (key_number >= 1 && key_number <= 12) ? key_number - 1 : 0; + if (shift) index += 12; + if (ctrl) index += 24; + p += sprintf(p, "\x1B[%c", sco_codes[index]); + } else if ((term->vt52_mode || term->funky_type == FUNKY_VT100P) && + code >= 11 && code <= 24) { + int offt = 0; + if (code > 15) + offt++; + if (code > 21) + offt++; + if (term->vt52_mode) + p += sprintf(p, "\x1B%c", code + 'P' - 11 - offt); + else + p += sprintf(p, "\x1BO%c", code + 'P' - 11 - offt); + } else if (term->funky_type == FUNKY_LINUX && code >= 11 && code <= 15) { + p += sprintf(p, "\x1B[[%c", code + 'A' - 11); + } else if (term->funky_type == FUNKY_XTERM && code >= 11 && code <= 14) { + if (term->vt52_mode) + p += sprintf(p, "\x1B%c", code + 'P' - 11); + else + p += sprintf(p, "\x1BO%c", code + 'P' - 11); + } else { + p += sprintf(p, "\x1B[%d~", code); + } + + return p - buf; +} + +int format_small_keypad_key(char *buf, Terminal *term, SmallKeypadKey key) +{ + char *p = buf; + + int code; + switch (key) { + case SKK_HOME: code = 1; break; + case SKK_INSERT: code = 2; break; + case SKK_DELETE: code = 3; break; + case SKK_END: code = 4; break; + case SKK_PGUP: code = 5; break; + case SKK_PGDN: code = 6; break; + default: unreachable("bad small keypad key enum value"); + } + + /* Reorder edit keys to physical order */ + if (term->funky_type == FUNKY_VT400 && code <= 6) + code = "\0\2\1\4\5\3\6"[code]; + + if (term->vt52_mode && code > 0 && code <= 6) { + p += sprintf(p, "\x1B%c", " HLMEIG"[code]); + } else if (term->funky_type == FUNKY_SCO) { + static const char codes[] = "HL.FIG"; + if (code == 3) { + *p++ = '\x7F'; + } else { + p += sprintf(p, "\x1B[%c", codes[code-1]); + } + } else if ((code == 1 || code == 4) && term->rxvt_homeend) { + p += sprintf(p, code == 1 ? "\x1B[H" : "\x1BOw"); + } else { + p += sprintf(p, "\x1B[%d~", code); + } + + return p - buf; +} + +int format_numeric_keypad_key(char *buf, Terminal *term, char key, + bool shift, bool ctrl) +{ + char *p = buf; + bool app_keypad = (term->app_keypad_keys && !term->no_applic_k); + + if (term->nethack_keypad && (key >= '1' && key <= '9')) { + static const char nh_base[] = "bjnh.lyku"; + char c = nh_base[key - '1']; + if (ctrl && c != '.') + c &= 0x1F; + else if (shift && c != '.') + c += 'A'-'a'; + *p++ = c; + } else { + int xkey = 0; + + if (term->funky_type == FUNKY_VT400 || + (term->funky_type <= FUNKY_LINUX && app_keypad)) { + switch (key) { + case 'G': xkey = 'P'; break; + case '/': xkey = 'Q'; break; + case '*': xkey = 'R'; break; + case '-': xkey = 'S'; break; + } + } + + if (app_keypad) { + switch (key) { + case '0': xkey = 'p'; break; + case '1': xkey = 'q'; break; + case '2': xkey = 'r'; break; + case '3': xkey = 's'; break; + case '4': xkey = 't'; break; + case '5': xkey = 'u'; break; + case '6': xkey = 'v'; break; + case '7': xkey = 'w'; break; + case '8': xkey = 'x'; break; + case '9': xkey = 'y'; break; + case '.': xkey = 'n'; break; + case '\r': xkey = 'M'; break; + + case '+': + /* + * Keypad + is tricky. It covers a space that would + * be taken up on the VT100 by _two_ keys; so we + * let Shift select between the two. Worse still, + * in xterm function key mode we change which two... + */ + if (term->funky_type == FUNKY_XTERM) + xkey = shift ? 'l' : 'k'; + else + xkey = shift ? 'm' : 'l'; + break; + + case '/': + if (term->funky_type == FUNKY_XTERM) + xkey = 'o'; + break; + case '*': + if (term->funky_type == FUNKY_XTERM) + xkey = 'j'; + break; + case '-': + if (term->funky_type == FUNKY_XTERM) + xkey = 'm'; + break; + } + } + + if (xkey) { + if (term->vt52_mode) { + if (xkey >= 'P' && xkey <= 'S') + p += sprintf(p, "\x1B%c", xkey); + else + p += sprintf(p, "\x1B?%c", xkey); + } else + p += sprintf(p, "\x1BO%c", xkey); + } + } + + return p - buf; +} + +void term_keyinputw(Terminal *term, const wchar_t *widebuf, int len) +{ + strbuf *buf = term_input_data_from_unicode(term, widebuf, len); + if (buf->len) + term_keyinput_internal(term, buf->s, buf->len, true); + strbuf_free(buf); +} + +void term_keyinput(Terminal *term, int codepage, const void *str, int len) +{ + if (codepage < 0 || codepage == term->ucsdata->line_codepage) { + /* + * This text needs no translation, either because it's already + * in the right character set, or because we got the special + * codepage value -1 from our caller which means 'this data + * should be charset-agnostic, just send it raw' (for really + * simple things like control characters). + */ + term_keyinput_internal(term, str, len, true); + } else { + strbuf *buf = term_input_data_from_charset(term, codepage, str, len); + if (buf->len) + term_keyinput_internal(term, buf->s, buf->len, true); + strbuf_free(buf); + } +} + +void term_nopaste(Terminal *term) +{ + if (term->paste_len == 0) + return; + sfree(term->paste_buffer); + term_bracketed_paste_stop(term); + term->paste_buffer = NULL; + term->paste_len = 0; +} + +static void deselect(Terminal *term) +{ + term->selstate = NO_SELECTION; + term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0; +} + +void term_lost_clipboard_ownership(Terminal *term, int clipboard) +{ + if (!(term->n_mouse_select_clipboards > 1 && + clipboard == term->mouse_select_clipboards[1])) + return; + + deselect(term); + term_update(term); + + /* + * Since terminal output is suppressed during drag-selects, we + * should make sure to write any pending output if one has just + * finished. + */ + if (term->selstate != DRAGGING) + term_out(term); +} + +static void term_added_data(Terminal *term) +{ + if (!term->in_term_out) { + term->in_term_out = true; + term_reset_cblink(term); + /* + * During drag-selects, we do not process terminal input, + * because the user will want the screen to hold still to + * be selected. + */ + if (term->selstate != DRAGGING) + term_out(term); + term->in_term_out = false; + } +} + +size_t term_data(Terminal *term, const void *data, size_t len) +{ + bufchain_add(&term->inbuf, data, len); + term_added_data(term); + + /* + * term_out() always completely empties inbuf. Therefore, + * there's no reason at all to return anything other than zero + * from this function, because there _can't_ be a question of + * the remote side needing to wait until term_out() has cleared + * a backlog. + * + * This is a slightly suboptimal way to deal with SSH-2 - in + * principle, the window mechanism would allow us to continue + * to accept data on forwarded ports and X connections even + * while the terminal processing was going slowly - but we + * can't do the 100% right thing without moving the terminal + * processing into a separate thread, and that might hurt + * portability. So we manage stdout buffering the old SSH-1 way: + * if the terminal processing goes slowly, the whole SSH + * connection stops accepting data until it's ready. + * + * In practice, I can't imagine this causing serious trouble. + */ + return 0; +} + +void term_provide_logctx(Terminal *term, LogContext *logctx) +{ + term->logctx = logctx; +} + +void term_set_focus(Terminal *term, bool has_focus) +{ + term->has_focus = has_focus; + term_schedule_cblink(term); +} + +/* + * Provide "auto" settings for remote tty modes, suitable for an + * application with a terminal window. + */ +char *term_get_ttymode(Terminal *term, const char *mode) +{ + const char *val = NULL; + if (strcmp(mode, "ERASE") == 0) { + val = term->bksp_is_delete ? "^?" : "^H"; + } else if (strcmp(mode, "IUTF8") == 0) { + val = (term->ucsdata->line_codepage == CP_UTF8) ? "yes" : "no"; + } + /* FIXME: perhaps we should set ONLCR based on lfhascr as well? */ + /* FIXME: or ECHO and friends based on local echo state? */ + return dupstr(val); +} + +struct term_userpass_state { + size_t curr_prompt; + bool done_prompt; /* printed out prompt yet? */ +}; + +/* Tiny wrapper to make it easier to write lots of little strings */ +static inline void term_write(Terminal *term, ptrlen data) +{ + term_data(term, data.ptr, data.len); +} + +/* + * Signal that a prompts_t is done. This involves sending a + * notification to the caller, and also turning off our own callback + * that listens for more data arriving in the ldisc's input queue. + */ +static inline int signal_prompts_t(Terminal *term, prompts_t *p, int result) +{ + assert(p->callback && "Asynchronous userpass input requires a callback"); + queue_toplevel_callback(p->callback, p->callback_ctx); + ldisc_enable_prompt_callback(term->ldisc, NULL); + p->idata = result; + return result; +} + +/* + * Process some terminal data in the course of username/password + * input. + */ +int term_get_userpass_input(Terminal *term, prompts_t *p) +{ + if (!term->ldisc) { + /* Can't handle interactive prompts without an ldisc */ + return signal_prompts_t(term, p, 0); + } + + if (p->idata >= 0) { + /* We've already finished these prompts, so return the same + * result again */ + return p->idata; + } + + struct term_userpass_state *s = (struct term_userpass_state *)p->data; + + if (!s) { + /* + * First call. Set some stuff up. + */ + p->data = s = snew(struct term_userpass_state); + p->idata = -1; + s->curr_prompt = 0; + s->done_prompt = false; + /* We only print the `name' caption if we have to... */ + if (p->name_reqd && p->name) { + ptrlen plname = ptrlen_from_asciz(p->name); + term_write(term, plname); + if (!ptrlen_endswith(plname, PTRLEN_LITERAL("\n"), NULL)) + term_write(term, PTRLEN_LITERAL("\r\n")); + } + /* ...but we always print any `instruction'. */ + if (p->instruction) { + ptrlen plinst = ptrlen_from_asciz(p->instruction); + term_write(term, plinst); + if (!ptrlen_endswith(plinst, PTRLEN_LITERAL("\n"), NULL)) + term_write(term, PTRLEN_LITERAL("\r\n")); + } + /* + * Zero all the results, in case we abort half-way through. + */ + { + int i; + for (i = 0; i < (int)p->n_prompts; i++) + prompt_set_result(p->prompts[i], ""); + } + } + + while (s->curr_prompt < p->n_prompts) { + + prompt_t *pr = p->prompts[s->curr_prompt]; + bool finished_prompt = false; + + if (!s->done_prompt) { + term_write(term, ptrlen_from_asciz(pr->prompt)); + s->done_prompt = true; + } + + /* Breaking out here ensures that the prompt is printed even + * if we're now waiting for user data. */ + if (!ldisc_has_input_buffered(term->ldisc)) + break; + + /* FIXME: should we be using local-line-editing code instead? */ + while (!finished_prompt && ldisc_has_input_buffered(term->ldisc)) { + LdiscInputToken tok = ldisc_get_input_token(term->ldisc); + + char c; + if (tok.is_special) { + switch (tok.code) { + case SS_EOL: c = 13; break; + case SS_EC: c = 8; break; + case SS_IP: c = 3; break; + case SS_EOF: c = 3; break; + default: continue; + } + } else { + c = tok.chr; + } + + switch (c) { + case 10: + case 13: + term_write(term, PTRLEN_LITERAL("\r\n")); + /* go to next prompt, if any */ + s->curr_prompt++; + s->done_prompt = false; + finished_prompt = true; /* break out */ + break; + case 8: + case 127: + if (pr->result->len > 0) { + if (pr->echo) + term_write(term, PTRLEN_LITERAL("\b \b")); + strbuf_shrink_by(pr->result, 1); + } + break; + case 21: + case 27: + while (pr->result->len > 0) { + if (pr->echo) + term_write(term, PTRLEN_LITERAL("\b \b")); + strbuf_shrink_by(pr->result, 1); + } + break; + case 3: + case 4: + /* Immediate abort. */ + term_write(term, PTRLEN_LITERAL("\r\n")); + sfree(s); + p->data = NULL; + return signal_prompts_t(term, p, 0); /* user abort */ + default: + /* + * This simplistic check for printability is disabled + * when we're doing password input, because some people + * have control characters in their passwords. + */ + if (!pr->echo || (c >= ' ' && c <= '~') || + ((unsigned char) c >= 160)) { + put_byte(pr->result, c); + if (pr->echo) + term_write(term, make_ptrlen(&c, 1)); + } + break; + } + } + + } + + if (s->curr_prompt < p->n_prompts) { + ldisc_enable_prompt_callback(term->ldisc, p); + return -1; /* more data required */ + } else { + sfree(s); + p->data = NULL; + return signal_prompts_t(term, p, +1); /* all done */ + } +} + +void term_notify_minimised(Terminal *term, bool minimised) +{ + term->minimised = minimised; +} + +void term_notify_palette_changed(Terminal *term) +{ + palette_reset(term, true); +} + +void term_notify_window_pos(Terminal *term, int x, int y) +{ + term->winpos_x = x; + term->winpos_y = y; +} + +void term_notify_window_size_pixels(Terminal *term, int x, int y) +{ + term->winpixsize_x = x; + term->winpixsize_y = y; +} diff --git a/terminal/terminal.h b/terminal/terminal.h new file mode 100644 index 00000000..c463f7a8 --- /dev/null +++ b/terminal/terminal.h @@ -0,0 +1,529 @@ +/* + * Internals of the Terminal structure, for those other modules + * which need to look inside it. It would be nice if this could be + * folded back into terminal.c in future, with an abstraction layer + * to handle everything that other modules need to know about it; + * but for the moment, this will do. + */ + +#ifndef PUTTY_TERMINAL_H +#define PUTTY_TERMINAL_H + +#include "tree234.h" + +struct beeptime { + struct beeptime *next; + unsigned long ticks; +}; + +#define TRUST_SIGIL_WIDTH 3 +#define TRUST_SIGIL_CHAR 0xDFFE + +typedef struct { + int y, x; +} pos; + +typedef struct termchar termchar; +typedef struct termline termline; + +struct termchar { + /* + * Any code in terminal.c which definitely needs to be changed + * when extra fields are added here is labelled with a comment + * saying FULL-TERMCHAR. + */ + unsigned long chr; + unsigned long attr; + truecolour truecolour; + + /* + * The cc_next field is used to link multiple termchars + * together into a list, so as to fit more than one character + * into a character cell (Unicode combining characters). + * + * cc_next is a relative offset into the current array of + * termchars. I.e. to advance to the next character in a list, + * one does `tc += tc->next'. + * + * Zero means end of list. + */ + int cc_next; +}; + +struct termline { + unsigned short lattr; + int cols; /* number of real columns on the line */ + int size; /* number of allocated termchars + * (cc-lists may make this > cols) */ + bool temporary; /* true if decompressed from scrollback */ + int cc_free; /* offset to first cc in free list */ + struct termchar *chars; + bool trusted; +}; + +struct bidi_cache_entry { + int width; + bool trusted; + struct termchar *chars; + int *forward, *backward; /* the permutations of line positions */ +}; + +struct term_utf8_decode { + int state; /* Is there a pending UTF-8 character */ + int chr; /* and what is it so far? */ + int size; /* The size of the UTF character. */ +}; + +struct terminal_tag { + + int compatibility_level; + + tree234 *scrollback; /* lines scrolled off top of screen */ + tree234 *screen; /* lines on primary screen */ + tree234 *alt_screen; /* lines on alternate screen */ + int disptop; /* distance scrolled back (0 or -ve) */ + int tempsblines; /* number of lines of .scrollback that + can be retrieved onto the terminal + ("temporary scrollback") */ + + termline **disptext; /* buffer of text on real screen */ + int dispcursx, dispcursy; /* location of cursor on real screen */ + int curstype; /* type of cursor on real screen */ + +#define VBELL_TIMEOUT (TICKSPERSEC/10) /* visual bell lasts 1/10 sec */ + + struct beeptime *beephead, *beeptail; + int nbeeps; + bool beep_overloaded; + long lastbeep; + +#define TTYPE termchar +#define TSIZE (sizeof(TTYPE)) + + int default_attr, curr_attr, save_attr; + truecolour curr_truecolour, save_truecolour; + termchar basic_erase_char, erase_char; + + bufchain inbuf; /* terminal input buffer */ + + pos curs; /* cursor */ + pos savecurs; /* saved cursor position */ + int marg_t, marg_b; /* scroll margins */ + bool dec_om; /* DEC origin mode flag */ + bool wrap, wrapnext; /* wrap flags */ + bool insert; /* insert-mode flag */ + int cset; /* 0 or 1: which char set */ + int save_cset, save_csattr; /* saved with cursor position */ + bool save_utf, save_wnext; /* saved with cursor position */ + bool rvideo; /* global reverse video flag */ + unsigned long rvbell_startpoint; /* for ESC[?5hESC[?5l vbell */ + bool cursor_on; /* cursor enabled flag */ + bool reset_132; /* Flag ESC c resets to 80 cols */ + bool use_bce; /* Use Background coloured erase */ + bool cblinker; /* When blinking is the cursor on ? */ + bool tblinker; /* When the blinking text is on */ + bool blink_is_real; /* Actually blink blinking text */ + int sco_acs, save_sco_acs; /* CSI 10,11,12m -> OEM charset */ + bool vt52_bold; /* Force bold on non-bold colours */ + bool utf; /* Are we in toggleable UTF-8 mode? */ + term_utf8_decode utf8; /* If so, here's our decoding state */ + bool printing, only_printing; /* Are we doing ANSI printing? */ + int print_state; /* state of print-end-sequence scan */ + bufchain printer_buf; /* buffered data for printer */ + printer_job *print_job; + + /* ESC 7 saved state for the alternate screen */ + pos alt_savecurs; + int alt_save_attr; + truecolour alt_save_truecolour; + int alt_save_cset, alt_save_csattr; + bool alt_save_utf; + bool alt_save_wnext; + int alt_save_sco_acs; + + int rows, cols, savelines; + bool has_focus; + bool in_vbell; + long vbell_end; + bool app_cursor_keys, app_keypad_keys, vt52_mode; + bool repeat_off, srm_echo, cr_lf_return; + bool seen_disp_event; + bool big_cursor; + + bool xterm_mouse_forbidden; + int xterm_mouse; /* send mouse messages to host */ + bool xterm_extended_mouse; + bool urxvt_extended_mouse; + int mouse_is_down; /* used while tracking mouse buttons */ + + bool bracketed_paste, bracketed_paste_active; + + int cset_attr[2]; + +/* + * Saved settings on the alternate screen. + */ + int alt_x, alt_y; + bool alt_wnext, alt_ins; + bool alt_om, alt_wrap; + int alt_cset, alt_sco_acs; + bool alt_utf; + int alt_t, alt_b; + int alt_which; + int alt_sblines; /* # of lines on alternate screen that should be used for scrollback. */ + +#define ARGS_MAX 32 /* max # of esc sequence arguments */ +#define ARG_DEFAULT 0 /* if an arg isn't specified */ +#define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) ) + unsigned esc_args[ARGS_MAX]; + int esc_nargs; + int esc_query; +#define ANSI(x,y) ((x)+((y)*256)) +#define ANSI_QUE(x) ANSI(x,1) + +#define OSC_STR_MAX 2048 + int osc_strlen; + char osc_string[OSC_STR_MAX + 1]; + bool osc_w; + + char id_string[1024]; + + unsigned char *tabs; + + enum { + TOPLEVEL, + SEEN_ESC, + SEEN_CSI, + SEEN_OSC, + SEEN_OSC_W, + + DO_CTRLS, + + SEEN_OSC_P, + OSC_STRING, OSC_MAYBE_ST, + VT52_ESC, + VT52_Y1, + VT52_Y2, + VT52_FG, + VT52_BG + } termstate; + + enum { + NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED + } selstate; + enum { + LEXICOGRAPHIC, RECTANGULAR + } seltype; + enum { + SM_CHAR, SM_WORD, SM_LINE + } selmode; + pos selstart, selend, selanchor; + + short wordness[256]; + + /* Mask of attributes to pay attention to when painting. */ + int attr_mask; + + wchar_t *paste_buffer; + int paste_len, paste_pos; + + Backend *backend; + + Ldisc *ldisc; + + TermWin *win; + + LogContext *logctx; + + struct unicode_data *ucsdata; + + unsigned long last_graphic_char; + + /* + * We maintain a full copy of a Conf here, not merely a pointer + * to it. That way, when we're passed a new one for + * reconfiguration, we can check the differences and adjust the + * _current_ setting of (e.g.) auto wrap mode rather than only + * the default. + */ + Conf *conf; + + /* + * GUI implementations of seat_output call term_out, but it can + * also be called from the ldisc if the ldisc is called _within_ + * term_out. So we have to guard against re-entrancy - if + * seat_output is called recursively like this, it will simply add + * data to the end of the buffer term_out is in the process of + * working through. + */ + bool in_term_out; + + /* + * We don't permit window updates too close together, to avoid CPU + * churn pointlessly redrawing the window faster than the user can + * read. So after an update, we set window_update_cooldown = true + * and schedule a timer to reset it to false. In between those + * times, window updates are not performed, and instead we set + * window_update_pending = true, which will remind us to perform + * the deferred redraw when the cooldown period ends and + * window_update_cooldown is reset to false. + */ + bool window_update_pending, window_update_cooldown; + long window_update_cooldown_end; + + /* + * Track pending blinks and tblinks. + */ + bool tblink_pending, cblink_pending; + long next_tblink, next_cblink; + + /* + * These are buffers used by the bidi and Arabic shaping code. + */ + termchar *ltemp; + int ltemp_size; + bidi_char *wcFrom, *wcTo; + int wcFromTo_size; + struct bidi_cache_entry *pre_bidi_cache, *post_bidi_cache; + size_t bidi_cache_size; + + /* + * Current trust state, used to annotate every line of the + * terminal that a graphic character is output to. + */ + bool trusted; + + /* + * We copy a bunch of stuff out of the Conf structure into local + * fields in the Terminal structure, to avoid the repeated + * tree234 lookups which would be involved in fetching them from + * the former every time. + */ + bool ansi_colour; + char *answerback; + int answerbacklen; + bool no_arabicshaping; + int beep; + bool bellovl; + int bellovl_n; + int bellovl_s; + int bellovl_t; + bool no_bidi; + bool bksp_is_delete; + bool blink_cur; + bool blinktext; + bool cjk_ambig_wide; + int conf_height; + int conf_width; + bool crhaslf; + bool erase_to_scrollback; + int funky_type; + bool lfhascr; + bool logflush; + int logtype; + bool mouse_override; + bool nethack_keypad; + bool no_alt_screen; + bool no_applic_c; + bool no_applic_k; + bool no_dbackspace; + bool no_mouse_rep; + bool no_remote_charset; + bool no_remote_resize; + bool no_remote_wintitle; + bool no_remote_clearscroll; + bool rawcnp; + bool utf8linedraw; + bool rect_select; + int remote_qtitle_action; + bool rxvt_homeend; + bool scroll_on_disp; + bool scroll_on_key; + bool xterm_256_colour; + bool true_colour; + + wchar_t *last_selected_text; + int *last_selected_attr; + truecolour *last_selected_tc; + size_t last_selected_len; + int mouse_select_clipboards[N_CLIPBOARDS]; + int n_mouse_select_clipboards; + int mouse_paste_clipboard; + + char *window_title, *icon_title; + bool minimised; + + /* Multi-layered colour palette. The colours from Conf (plus the + * default xterm-256 ones that don't have Conf ids at all) have + * lowest priority, followed by platform overrides if any, + * followed by escape-sequence overrides during the session. */ + struct term_subpalette { + rgb values[OSC4_NCOLOURS]; + bool present[OSC4_NCOLOURS]; + } subpalettes[3]; +#define SUBPAL_CONF 0 +#define SUBPAL_PLATFORM 1 +#define SUBPAL_SESSION 2 + + /* The composite palette that we make out of the above */ + rgb palette[OSC4_NCOLOURS]; + + unsigned winpos_x, winpos_y, winpixsize_x, winpixsize_y; + + /* + * Assorted 'pending' flags for ancillary window changes performed + * in term_update. Generally, to trigger one of these operations, + * you set the pending flag and/or the parameters here, then call + * term_schedule_update. + */ + bool win_move_pending; + int win_move_pending_x, win_move_pending_y; + bool win_resize_pending; + int win_resize_pending_w, win_resize_pending_h; + bool win_zorder_pending; + bool win_zorder_top; + bool win_minimise_pending; + bool win_minimise_enable; + bool win_maximise_pending; + bool win_maximise_enable; + bool win_title_pending, win_icon_title_pending; + bool win_pointer_shape_pending; + bool win_pointer_shape_raw; + bool win_refresh_pending; + bool win_scrollbar_update_pending; + bool win_palette_pending; + unsigned win_palette_pending_min, win_palette_pending_limit; +}; + +static inline bool in_utf(Terminal *term) +{ + return term->utf || term->ucsdata->line_codepage == CP_UTF8; +} + +unsigned long term_translate( + Terminal *term, term_utf8_decode *utf8, unsigned char c); +static inline int term_char_width(Terminal *term, unsigned int c) +{ + return term->cjk_ambig_wide ? mk_wcwidth_cjk(c) : mk_wcwidth(c); +} + +/* + * UCSINCOMPLETE is returned from term_translate if it's successfully + * absorbed a byte but not emitted a complete character yet. + * UCSTRUNCATED indicates a truncated multibyte sequence (so the + * caller emits an error character and then calls term_translate again + * with the same input byte). UCSINVALID indicates some other invalid + * multibyte sequence, such as an overlong synonym, or a standalone + * continuation byte, or a completely illegal thing like 0xFE. These + * values are not stored in the terminal data structures at all. + */ +#define UCSINCOMPLETE 0x8000003FU /* '?' */ +#define UCSTRUNCATED 0x80000021U /* '!' */ +#define UCSINVALID 0x8000002AU /* '*' */ + +/* + * Maximum number of combining characters we're willing to store in a + * character cell. Our linked-list data representation permits an + * unlimited number of these in principle, but if we allowed that in + * practice then it would be an easy DoS to just squirt a squillion + * identical combining characters to someone's terminal and cause + * their PuTTY or pterm to consume lots of memory and CPU pointlessly. + * + * The precise figure of 32 is more or less arbitrary, but one point + * supporting it is UAX #15's comment that 30 combining characters is + * "significantly beyond what is required for any linguistic or + * technical usage". + */ +#define CC_LIMIT 32 + +/* ---------------------------------------------------------------------- + * Helper functions for dealing with the small 'pos' structure. + */ + +static inline bool poslt(pos p1, pos p2) +{ + if (p1.y != p2.y) + return p1.y < p2.y; + return p1.x < p2.x; +} + +static inline bool posle(pos p1, pos p2) +{ + if (p1.y != p2.y) + return p1.y < p2.y; + return p1.x <= p2.x; +} + +static inline bool poseq(pos p1, pos p2) +{ + return p1.y == p2.y && p1.x == p2.x; +} + +static inline int posdiff_fn(pos p1, pos p2, int cols) +{ + return (p1.y - p2.y) * (cols+1) + (p1.x - p2.x); +} + +/* Convenience wrapper on posdiff_fn which uses the 'Terminal *term' + * that more or less every function in terminal.c will have in scope. + * For safety's sake I include a TYPECHECK that ensures it really is a + * structure pointer of the right type. */ +#define GET_TERM_COLS TYPECHECK(term == (Terminal *)0, term->cols) +#define posdiff(p1,p2) posdiff_fn(p1, p2, GET_TERM_COLS) + +/* Product-order comparisons for rectangular block selection. */ + +static inline bool posPle(pos p1, pos p2) +{ + return p1.y <= p2.y && p1.x <= p2.x; +} + +static inline bool posPle_left(pos p1, pos p2) +{ + /* + * This function is used for checking whether a given character + * cell of the terminal ought to be highlighted as part of the + * selection, by comparing with term->selend. term->selend stores + * the location one space to the right of the last highlighted + * character. So we want to highlight the characters that are + * less-or-equal (in the product order) to the character just left + * of p2. + * + * (Setting up term->selend that way was the easiest way to get + * rectangular selection working at all, in a code base that had + * done lexicographic selection the way I happened to have done + * it.) + */ + return p1.y <= p2.y && p1.x < p2.x; +} + +static inline bool incpos_fn(pos *p, int cols) +{ + if (p->x == cols) { + p->x = 0; + p->y++; + return true; + } + p->x++; + return false; +} + +static inline bool decpos_fn(pos *p, int cols) +{ + if (p->x == 0) { + p->x = cols; + p->y--; + return true; + } + p->x--; + return false; +} + +/* Convenience wrappers on incpos and decpos which use term->cols + * (similarly to posdiff above), and also (for mild convenience and + * mostly historical inertia) let you leave off the & at every call + * site. */ +#define incpos(p) incpos_fn(&(p), GET_TERM_COLS) +#define decpos(p) decpos_fn(&(p), GET_TERM_COLS) + +#endif |