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path: root/imgui/imstb_textedit.h
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Diffstat (limited to 'imgui/imstb_textedit.h')
-rw-r--r--imgui/imstb_textedit.h80
1 files changed, 55 insertions, 25 deletions
diff --git a/imgui/imstb_textedit.h b/imgui/imstb_textedit.h
index 2077d02a..76446709 100644
--- a/imgui/imstb_textedit.h
+++ b/imgui/imstb_textedit.h
@@ -148,6 +148,8 @@
// STB_TEXTEDIT_K_RIGHT keyboard input to move cursor right
// STB_TEXTEDIT_K_UP keyboard input to move cursor up
// STB_TEXTEDIT_K_DOWN keyboard input to move cursor down
+// STB_TEXTEDIT_K_PGUP keyboard input to move cursor up a page
+// STB_TEXTEDIT_K_PGDOWN keyboard input to move cursor down a page
// STB_TEXTEDIT_K_LINESTART keyboard input to move cursor to start of line // e.g. HOME
// STB_TEXTEDIT_K_LINEEND keyboard input to move cursor to end of line // e.g. END
// STB_TEXTEDIT_K_TEXTSTART keyboard input to move cursor to start of text // e.g. ctrl-HOME
@@ -170,14 +172,10 @@
// STB_TEXTEDIT_K_TEXTSTART2 secondary keyboard input to move cursor to start of text
// STB_TEXTEDIT_K_TEXTEND2 secondary keyboard input to move cursor to end of text
//
-// Todo:
-// STB_TEXTEDIT_K_PGUP keyboard input to move cursor up a page
-// STB_TEXTEDIT_K_PGDOWN keyboard input to move cursor down a page
-//
// Keyboard input must be encoded as a single integer value; e.g. a character code
// and some bitflags that represent shift states. to simplify the interface, SHIFT must
// be a bitflag, so we can test the shifted state of cursor movements to allow selection,
-// i.e. (STB_TEXTED_K_RIGHT|STB_TEXTEDIT_K_SHIFT) should be shifted right-arrow.
+// i.e. (STB_TEXTEDIT_K_RIGHT|STB_TEXTEDIT_K_SHIFT) should be shifted right-arrow.
//
// You can encode other things, such as CONTROL or ALT, in additional bits, and
// then test for their presence in e.g. STB_TEXTEDIT_K_WORDLEFT. For example,
@@ -337,6 +335,10 @@ typedef struct
// each textfield keeps its own insert mode state. to keep an app-wide
// insert mode, copy this value in/out of the app state
+ int row_count_per_page;
+ // page size in number of row.
+ // this value MUST be set to >0 for pageup or pagedown in multilines documents.
+
/////////////////////
//
// private data
@@ -855,12 +857,16 @@ retry:
break;
case STB_TEXTEDIT_K_DOWN:
- case STB_TEXTEDIT_K_DOWN | STB_TEXTEDIT_K_SHIFT: {
+ case STB_TEXTEDIT_K_DOWN | STB_TEXTEDIT_K_SHIFT:
+ case STB_TEXTEDIT_K_PGDOWN:
+ case STB_TEXTEDIT_K_PGDOWN | STB_TEXTEDIT_K_SHIFT: {
StbFindState find;
StbTexteditRow row;
- int i, sel = (key & STB_TEXTEDIT_K_SHIFT) != 0;
+ int i, j, sel = (key & STB_TEXTEDIT_K_SHIFT) != 0;
+ int is_page = (key & ~STB_TEXTEDIT_K_SHIFT) == STB_TEXTEDIT_K_PGDOWN;
+ int row_count = is_page ? state->row_count_per_page : 1;
- if (state->single_line) {
+ if (!is_page && state->single_line) {
// on windows, up&down in single-line behave like left&right
key = STB_TEXTEDIT_K_RIGHT | (key & STB_TEXTEDIT_K_SHIFT);
goto retry;
@@ -869,17 +875,25 @@ retry:
if (sel)
stb_textedit_prep_selection_at_cursor(state);
else if (STB_TEXT_HAS_SELECTION(state))
- stb_textedit_move_to_last(str,state);
+ stb_textedit_move_to_last(str, state);
// compute current position of cursor point
stb_textedit_clamp(str, state);
stb_textedit_find_charpos(&find, str, state->cursor, state->single_line);
- // now find character position down a row
- if (find.length) {
- float goal_x = state->has_preferred_x ? state->preferred_x : find.x;
- float x;
+ for (j = 0; j < row_count; ++j) {
+ float x, goal_x = state->has_preferred_x ? state->preferred_x : find.x;
int start = find.first_char + find.length;
+
+ if (find.length == 0)
+ break;
+
+ // [DEAR IMGUI]
+ // going down while being on the last line shouldn't bring us to that line end
+ if (STB_TEXTEDIT_GETCHAR(str, find.first_char + find.length - 1) != STB_TEXTEDIT_NEWLINE)
+ break;
+
+ // now find character position down a row
state->cursor = start;
STB_TEXTEDIT_LAYOUTROW(&row, str, state->cursor);
x = row.x0;
@@ -901,17 +915,25 @@ retry:
if (sel)
state->select_end = state->cursor;
+
+ // go to next line
+ find.first_char = find.first_char + find.length;
+ find.length = row.num_chars;
}
break;
}
case STB_TEXTEDIT_K_UP:
- case STB_TEXTEDIT_K_UP | STB_TEXTEDIT_K_SHIFT: {
+ case STB_TEXTEDIT_K_UP | STB_TEXTEDIT_K_SHIFT:
+ case STB_TEXTEDIT_K_PGUP:
+ case STB_TEXTEDIT_K_PGUP | STB_TEXTEDIT_K_SHIFT: {
StbFindState find;
StbTexteditRow row;
- int i, sel = (key & STB_TEXTEDIT_K_SHIFT) != 0;
+ int i, j, prev_scan, sel = (key & STB_TEXTEDIT_K_SHIFT) != 0;
+ int is_page = (key & ~STB_TEXTEDIT_K_SHIFT) == STB_TEXTEDIT_K_PGUP;
+ int row_count = is_page ? state->row_count_per_page : 1;
- if (state->single_line) {
+ if (!is_page && state->single_line) {
// on windows, up&down become left&right
key = STB_TEXTEDIT_K_LEFT | (key & STB_TEXTEDIT_K_SHIFT);
goto retry;
@@ -926,11 +948,14 @@ retry:
stb_textedit_clamp(str, state);
stb_textedit_find_charpos(&find, str, state->cursor, state->single_line);
- // can only go up if there's a previous row
- if (find.prev_first != find.first_char) {
+ for (j = 0; j < row_count; ++j) {
+ float x, goal_x = state->has_preferred_x ? state->preferred_x : find.x;
+
+ // can only go up if there's a previous row
+ if (find.prev_first == find.first_char)
+ break;
+
// now find character position up a row
- float goal_x = state->has_preferred_x ? state->preferred_x : find.x;
- float x;
state->cursor = find.prev_first;
STB_TEXTEDIT_LAYOUTROW(&row, str, state->cursor);
x = row.x0;
@@ -952,6 +977,14 @@ retry:
if (sel)
state->select_end = state->cursor;
+
+ // go to previous line
+ // (we need to scan previous line the hard way. maybe we could expose this as a new API function?)
+ prev_scan = find.prev_first > 0 ? find.prev_first - 1 : 0;
+ while (prev_scan > 0 && STB_TEXTEDIT_GETCHAR(str, prev_scan - 1) != STB_TEXTEDIT_NEWLINE)
+ --prev_scan;
+ find.first_char = find.prev_first;
+ find.prev_first = prev_scan;
}
break;
}
@@ -1075,10 +1108,6 @@ retry:
state->has_preferred_x = 0;
break;
}
-
-// @TODO:
-// STB_TEXTEDIT_K_PGUP - move cursor up a page
-// STB_TEXTEDIT_K_PGDOWN - move cursor down a page
}
}
@@ -1134,7 +1163,7 @@ static void stb_textedit_discard_redo(StbUndoState *state)
state->undo_rec[i].char_storage += n;
}
// now move all the redo records towards the end of the buffer; the first one is at 'redo_point'
- // {DEAR IMGUI]
+ // [DEAR IMGUI]
size_t move_size = (size_t)((STB_TEXTEDIT_UNDOSTATECOUNT - state->redo_point - 1) * sizeof(state->undo_rec[0]));
const char* buf_begin = (char*)state->undo_rec; (void)buf_begin;
const char* buf_end = (char*)state->undo_rec + sizeof(state->undo_rec); (void)buf_end;
@@ -1350,6 +1379,7 @@ static void stb_textedit_clear_state(STB_TexteditState *state, int is_single_lin
state->initialized = 1;
state->single_line = (unsigned char) is_single_line;
state->insert_mode = 0;
+ state->row_count_per_page = 0;
}
// API initialize
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-07 23:34:34 +0300