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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
#include "fitz-internal.h"
static inline int fz_tolower(int c)
{
/* TODO: proper unicode case folding */
if (c >= 'A' && c <= 'Z')
return c - 'A' + 'a';
return c;
}
static fz_text_char textcharat(fz_text_page *page, int idx)
{
static fz_text_char emptychar = { {0,0,0,0}, ' ' };
fz_text_block *block;
fz_text_line *line;
fz_text_span *span;
int ofs = 0;
for (block = page->blocks; block < page->blocks + page->len; block++)
{
for (line = block->lines; line < block->lines + block->len; line++)
{
for (span = line->spans; span < line->spans + line->len; span++)
{
if (idx < ofs + span->len)
return span->text[idx - ofs];
/* pseudo-newline */
if (span + 1 == line->spans + line->len)
{
if (idx == ofs + span->len)
return emptychar;
ofs++;
}
ofs += span->len;
}
}
}
return emptychar;
}
static int charat(fz_text_page *page, int idx)
{
return textcharat(page, idx).c;
}
static fz_bbox bboxat(fz_text_page *page, int idx)
{
return fz_round_rect(textcharat(page, idx).bbox);
}
static int textlen(fz_text_page *page)
{
fz_text_block *block;
fz_text_line *line;
fz_text_span *span;
int len = 0;
for (block = page->blocks; block < page->blocks + page->len; block++)
{
for (line = block->lines; line < block->lines + block->len; line++)
{
for (span = line->spans; span < line->spans + line->len; span++)
len += span->len;
len++; /* pseudo-newline */
}
}
return len;
}
static int match(fz_text_page *page, const char *s, int n)
{
int orig = n;
int c;
while (*s)
{
s += fz_chartorune(&c, (char *)s);
if (c == ' ' && charat(page, n) == ' ')
{
while (charat(page, n) == ' ')
n++;
}
else
{
if (fz_tolower(c) != fz_tolower(charat(page, n)))
return 0;
n++;
}
}
return n - orig;
}
int
fz_search_text_page(fz_context *ctx, fz_text_page *text, char *needle, fz_bbox *hit_bbox, int hit_max)
{
int pos, len, i, n, hit_count;
if (strlen(needle) == 0)
return 0;
hit_count = 0;
len = textlen(text);
for (pos = 0; pos < len; pos++)
{
n = match(text, needle, pos);
if (n)
{
fz_bbox linebox = fz_empty_bbox;
for (i = 0; i < n; i++)
{
fz_bbox charbox = bboxat(text, pos + i);
if (!fz_is_empty_bbox(charbox))
{
if (charbox.y0 != linebox.y0 || fz_absi(charbox.x0 - linebox.x1) > 5)
{
if (!fz_is_empty_bbox(linebox) && hit_count < hit_max)
hit_bbox[hit_count++] = linebox;
linebox = charbox;
}
else
{
linebox = fz_union_bbox(linebox, charbox);
}
}
}
if (!fz_is_empty_bbox(linebox) && hit_count < hit_max)
hit_bbox[hit_count++] = linebox;
}
}
return hit_count;
}
int
fz_highlight_selection(fz_context *ctx, fz_text_page *page, fz_bbox rect, fz_bbox *hit_bbox, int hit_max)
{
fz_bbox linebox, charbox;
fz_text_block *block;
fz_text_line *line;
fz_text_span *span;
int i, hit_count;
int x0 = rect.x0;
int x1 = rect.x1;
int y0 = rect.y0;
int y1 = rect.y1;
hit_count = 0;
for (block = page->blocks; block < page->blocks + page->len; block++)
{
for (line = block->lines; line < block->lines + block->len; line++)
{
linebox = fz_empty_bbox;
for (span = line->spans; span < line->spans + line->len; span++)
{
for (i = 0; i < span->len; i++)
{
charbox = fz_bbox_covering_rect(span->text[i].bbox);
if (charbox.x1 >= x0 && charbox.x0 <= x1 && charbox.y1 >= y0 && charbox.y0 <= y1)
{
if (charbox.y0 != linebox.y0 || fz_absi(charbox.x0 - linebox.x1) > 5)
{
if (!fz_is_empty_bbox(linebox) && hit_count < hit_max)
hit_bbox[hit_count++] = linebox;
linebox = charbox;
}
else
{
linebox = fz_union_bbox(linebox, charbox);
}
}
}
}
if (!fz_is_empty_bbox(linebox) && hit_count < hit_max)
hit_bbox[hit_count++] = linebox;
}
}
return hit_count;
}
char *
fz_copy_selection(fz_context *ctx, fz_text_page *page, fz_bbox rect)
{
fz_buffer *buffer;
fz_bbox hitbox;
fz_text_block *block;
fz_text_line *line;
fz_text_span *span;
int c, i, seen = 0;
char *s;
int x0 = rect.x0;
int x1 = rect.x1;
int y0 = rect.y0;
int y1 = rect.y1;
buffer = fz_new_buffer(ctx, 1024);
for (block = page->blocks; block < page->blocks + page->len; block++)
{
for (line = block->lines; line < block->lines + block->len; line++)
{
for (span = line->spans; span < line->spans + line->len; span++)
{
if (seen)
{
fz_write_buffer_byte(ctx, buffer, '\n');
}
seen = 0;
for (i = 0; i < span->len; i++)
{
hitbox = fz_bbox_covering_rect(span->text[i].bbox);
c = span->text[i].c;
if (c < 32)
c = '?';
if (hitbox.x1 >= x0 && hitbox.x0 <= x1 && hitbox.y1 >= y0 && hitbox.y0 <= y1)
{
fz_write_buffer_rune(ctx, buffer, c);
seen = 1;
}
}
seen = (seen && span + 1 == line->spans + line->len);
}
}
}
fz_write_buffer_byte(ctx, buffer, 0);
s = (char*)buffer->data;
fz_free(ctx, buffer);
return s;
}
|