1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2011 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Campbell Barton.
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/** \file blender/blenlib/intern/string_cursor_utf8.c
* \ingroup bli
*/
#include <stdio.h>
#include <stdlib.h>
#include "BLI_utildefines.h"
#include "BLI_string_utf8.h"
#include "BLI_string_cursor_utf8.h" /* own include */
#ifdef __GNUC__
# pragma GCC diagnostic error "-Wsign-conversion"
#endif
typedef enum strCursorDelimType {
STRCUR_DELIM_NONE,
STRCUR_DELIM_ALPHANUMERIC,
STRCUR_DELIM_PUNCT,
STRCUR_DELIM_BRACE,
STRCUR_DELIM_OPERATOR,
STRCUR_DELIM_QUOTE,
STRCUR_DELIM_WHITESPACE,
STRCUR_DELIM_OTHER
} strCursorDelimType;
static strCursorDelimType cursor_delim_type(const char *ch_utf8)
{
/* for full unicode support we really need to have large lookup tables to figure
* out whats what in every possible char set - and python, glib both have these. */
unsigned int uch = BLI_str_utf8_as_unicode(ch_utf8);
switch (uch) {
case ',':
case '.':
return STRCUR_DELIM_PUNCT;
case '{':
case '}':
case '[':
case ']':
case '(':
case ')':
return STRCUR_DELIM_BRACE;
case '+':
case '-':
case '=':
case '~':
case '%':
case '/':
case '<':
case '>':
case '^':
case '*':
case '&':
case '|':
return STRCUR_DELIM_OPERATOR;
case '\'':
case '\"':
return STRCUR_DELIM_QUOTE;
case ' ':
case '\t':
return STRCUR_DELIM_WHITESPACE;
case '\\':
case '@':
case '#':
case '$':
case ':':
case ';':
case '?':
case '!':
case 0xA3: /* pound */
case 0x80: /* euro */
/* case '_': *//* special case, for python */
return STRCUR_DELIM_OTHER;
default:
break;
}
return STRCUR_DELIM_ALPHANUMERIC; /* Not quite true, but ok for now */
}
int BLI_str_cursor_step_next_utf8(const char *str, size_t maxlen, int *pos)
{
const char *str_end = str + (maxlen + 1);
const char *str_pos = str + (*pos);
const char *str_next = BLI_str_find_next_char_utf8(str_pos, str_end);
if (str_next) {
(*pos) += (str_next - str_pos);
if ((*pos) > (int)maxlen) {
(*pos) = (int)maxlen;
}
return TRUE;
}
return FALSE;
}
int BLI_str_cursor_step_prev_utf8(const char *str, size_t UNUSED(maxlen), int *pos)
{
if ((*pos) > 0) {
const char *str_pos = str + (*pos);
const char *str_prev = BLI_str_find_prev_char_utf8(str, str_pos);
if (str_prev) {
(*pos) -= (str_pos - str_prev);
return TRUE;
}
}
return FALSE;
}
void BLI_str_cursor_step_utf8(const char *str, size_t maxlen,
int *pos, strCursorJumpDirection direction,
strCursorJumpType jump, bool use_init_step)
{
const int pos_orig = *pos;
if (direction == STRCUR_DIR_NEXT) {
if (use_init_step) {
BLI_str_cursor_step_next_utf8(str, maxlen, pos);
}
else {
BLI_assert(jump == STRCUR_JUMP_DELIM);
}
if (jump != STRCUR_JUMP_NONE) {
const strCursorDelimType delim_type = (*pos) < maxlen ? cursor_delim_type(&str[*pos]) : STRCUR_DELIM_NONE;
/* jump between special characters (/,\,_,-, etc.),
* look at function cursor_delim_type() for complete
* list of special character, ctr -> */
while ((*pos) < maxlen) {
if (BLI_str_cursor_step_next_utf8(str, maxlen, pos)) {
if ((jump != STRCUR_JUMP_ALL) && (delim_type != cursor_delim_type(&str[*pos]))) {
break;
}
}
else {
break; /* unlikely but just in case */
}
}
}
}
else if (direction == STRCUR_DIR_PREV) {
if (use_init_step) {
BLI_str_cursor_step_prev_utf8(str, maxlen, pos);
}
else {
BLI_assert(jump == STRCUR_JUMP_DELIM);
}
if (jump != STRCUR_JUMP_NONE) {
const strCursorDelimType delim_type = (*pos) > 0 ? cursor_delim_type(&str[(*pos) - 1]) : STRCUR_DELIM_NONE;
/* jump between special characters (/,\,_,-, etc.),
* look at function cursor_delim_type() for complete
* list of special character, ctr -> */
while ((*pos) > 0) {
const int pos_prev = *pos;
if (BLI_str_cursor_step_prev_utf8(str, maxlen, pos)) {
if ((jump != STRCUR_JUMP_ALL) && (delim_type != cursor_delim_type(&str[*pos]))) {
/* left only: compensate for index/change in direction */
if ((pos_orig - (*pos)) >= 1) {
*pos = pos_prev;
}
break;
}
}
else {
break;
}
}
}
}
else {
BLI_assert(0);
}
}
|
