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nsxivthumbs.c

461 lines · 9.5 KB · C

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1/* sxiv: thumbs.c
2 * Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#include <stdlib.h>
20#include <string.h>
21#include <sys/time.h>
22#include <sys/types.h>
23#include <sys/stat.h>
24#include <unistd.h>
25
26#include "config.h"
27#include "thumbs.h"
28#include "util.h"
29
30#ifdef __NetBSD__
31#define st_mtim st_mtimespec
32#define st_atim st_atimespec
33#endif
34
35const int thumb_dim = THUMB_SIZE + 10;
36char *cache_dir = NULL;
37
38int tns_cache_enabled() {
39 struct stat stats;
40
41 return cache_dir && !stat(cache_dir, &stats) && S_ISDIR(stats.st_mode) &&
42 !access(cache_dir, W_OK);
43}
44
45char* tns_cache_filename(const char *filename) {
46 size_t len;
47 char *cfile = NULL;
48 const char *abspath;
49
50 if (!cache_dir || !filename)
51 return NULL;
52
53 if (*filename != '/') {
54 if (!(abspath = absolute_path(filename)))
55 return NULL;
56 } else {
57 abspath = filename;
58 }
59
60 if (strncmp(abspath, cache_dir, strlen(cache_dir))) {
61 len = strlen(cache_dir) + strlen(abspath) + 6;
62 cfile = (char*) s_malloc(len);
63 snprintf(cfile, len, "%s/%s.png", cache_dir, abspath + 1);
64 }
65
66 if (abspath != filename)
67 free((void*) abspath);
68
69 return cfile;
70}
71
72Imlib_Image* tns_cache_load(const char *filename) {
73 char *cfile;
74 struct stat cstats, fstats;
75 Imlib_Image *im = NULL;
76
77 if (!filename)
78 return NULL;
79
80 if (stat(filename, &fstats))
81 return NULL;
82
83 if ((cfile = tns_cache_filename(filename))) {
84 if (!stat(cfile, &cstats) &&
85 cstats.st_mtim.tv_sec == fstats.st_mtim.tv_sec &&
86 cstats.st_mtim.tv_nsec / 1000 == fstats.st_mtim.tv_nsec / 1000)
87 {
88 im = imlib_load_image(cfile);
89 }
90 free(cfile);
91 }
92
93 return im;
94}
95
96void tns_cache_write(thumb_t *t, Bool force) {
97 char *cfile, *dirend;
98 struct stat cstats, fstats;
99 struct timeval times[2];
100 Imlib_Load_Error err = 0;
101
102 if (!t || !t->im || !t->filename)
103 return;
104
105 if (stat(t->filename, &fstats))
106 return;
107
108 if ((cfile = tns_cache_filename(t->filename))) {
109 if (force || stat(cfile, &cstats) ||
110 cstats.st_mtim.tv_sec != fstats.st_mtim.tv_sec ||
111 cstats.st_mtim.tv_nsec / 1000 != fstats.st_mtim.tv_nsec / 1000)
112 {
113 if ((dirend = strrchr(cfile, '/'))) {
114 *dirend = '\0';
115 err = r_mkdir(cfile);
116 *dirend = '/';
117 }
118
119 if (!err) {
120 imlib_context_set_image(t->im);
121 imlib_image_set_format("png");
122 imlib_save_image_with_error_return(cfile, &err);
123 }
124
125 if (err) {
126 warn("could not cache thumbnail: %s", t->filename);
127 } else {
128 TIMESPEC_TO_TIMEVAL(&times[0], &fstats.st_atim);
129 TIMESPEC_TO_TIMEVAL(&times[1], &fstats.st_mtim);
130 utimes(cfile, times);
131 }
132 }
133 free(cfile);
134 }
135}
136
137void tns_clean_cache(tns_t *tns) {
138 int dirlen, delete;
139 char *cfile, *filename, *tpos;
140 r_dir_t dir;
141
142 if (!cache_dir)
143 return;
144
145 if (r_opendir(&dir, cache_dir)) {
146 warn("could not open thumbnail cache directory: %s", cache_dir);
147 return;
148 }
149
150 dirlen = strlen(cache_dir);
151
152 while ((cfile = r_readdir(&dir))) {
153 filename = cfile + dirlen;
154 delete = 0;
155
156 if ((tpos = strrchr(filename, '.'))) {
157 *tpos = '\0';
158 delete = access(filename, F_OK);
159 *tpos = '.';
160 }
161
162 if (delete && unlink(cfile))
163 warn("could not delete cache file: %s", cfile);
164
165 free(cfile);
166 }
167
168 r_closedir(&dir);
169}
170
171
172void tns_init(tns_t *tns, int cnt) {
173 int len;
174 char *homedir;
175
176 if (!tns)
177 return;
178
179 if (cnt) {
180 tns->thumbs = (thumb_t*) s_malloc(cnt * sizeof(thumb_t));
181 memset(tns->thumbs, 0, cnt * sizeof(thumb_t));
182 } else {
183 tns->thumbs = NULL;
184 }
185
186 tns->cnt = tns->first = tns->sel = 0;
187 tns->cap = cnt;
188 tns->dirty = 0;
189
190 if ((homedir = getenv("HOME"))) {
191 if (cache_dir)
192 free(cache_dir);
193 len = strlen(homedir) + 10;
194 cache_dir = (char*) s_malloc(len * sizeof(char));
195 snprintf(cache_dir, len, "%s/.sxiv", homedir);
196 } else {
197 warn("could not locate thumbnail cache directory");
198 }
199}
200
201void tns_free(tns_t *tns) {
202 int i;
203
204 if (!tns)
205 return;
206
207 if (tns->thumbs) {
208 for (i = 0; i < tns->cnt; ++i) {
209 if (tns->thumbs[i].im) {
210 imlib_context_set_image(tns->thumbs[i].im);
211 imlib_free_image();
212 }
213 }
214 free(tns->thumbs);
215 tns->thumbs = NULL;
216 }
217
218 if (cache_dir) {
219 free(cache_dir);
220 cache_dir = NULL;
221 }
222}
223
224int tns_load(tns_t *tns, int n, const char *filename, unsigned char silent) {
225 int w, h;
226 int use_cache, cached = 0;
227 float z, zw, zh;
228 thumb_t *t;
229 Imlib_Image *im;
230
231 if (!tns || !tns->thumbs || !filename)
232 return 0;
233
234 if (n < 0 || n >= tns->cap)
235 return 0;
236
237 t = &tns->thumbs[n];
238 t->filename = filename;
239
240 if (t->im) {
241 imlib_context_set_image(t->im);
242 imlib_free_image();
243 }
244
245 if ((use_cache = tns_cache_enabled())) {
246 if ((im = tns_cache_load(filename)))
247 cached = 1;
248 }
249
250 if (!cached &&
251 (access(filename, R_OK) || !(im = imlib_load_image(filename))))
252 {
253 if (!silent)
254 warn("could not open image: %s", filename);
255 return 0;
256 }
257
258 imlib_context_set_image(im);
259 imlib_context_set_anti_alias(1);
260
261 w = imlib_image_get_width();
262 h = imlib_image_get_height();
263 zw = (float) THUMB_SIZE / (float) w;
264 zh = (float) THUMB_SIZE / (float) h;
265 z = MIN(zw, zh);
266 t->w = z * w;
267 t->h = z * h;
268
269 if (!(t->im = imlib_create_cropped_scaled_image(0, 0, w, h, t->w, t->h)))
270 die("could not allocate memory");
271
272 imlib_free_image_and_decache();
273
274 if (use_cache && !cached)
275 tns_cache_write(t, False);
276
277 tns->dirty = 1;
278 return 1;
279}
280
281void tns_check_view(tns_t *tns, Bool scrolled) {
282 int r;
283
284 if (!tns)
285 return;
286
287 tns->first -= tns->first % tns->cols;
288 r = tns->sel % tns->cols;
289
290 if (scrolled) {
291 /* move selection into visible area */
292 if (tns->sel >= tns->first + tns->cols * tns->rows)
293 tns->sel = tns->first + r + tns->cols * (tns->rows - 1);
294 else if (tns->sel < tns->first)
295 tns->sel = tns->first + r;
296 } else {
297 /* scroll to selection */
298 if (tns->first + tns->cols * tns->rows <= tns->sel) {
299 tns->first = tns->sel - r - tns->cols * (tns->rows - 1);
300 tns->dirty = 1;
301 } else if (tns->first > tns->sel) {
302 tns->first = tns->sel - r;
303 tns->dirty = 1;
304 }
305 }
306}
307
308void tns_render(tns_t *tns, win_t *win) {
309 int i, cnt, r, x, y;
310 thumb_t *t;
311
312 if (!tns || !tns->thumbs || !win)
313 return;
314
315 if (!tns->dirty)
316 return;
317
318 win_clear(win);
319 imlib_context_set_drawable(win->pm);
320
321 tns->cols = MAX(1, win->w / thumb_dim);
322 tns->rows = MAX(1, win->h / thumb_dim);
323
324 if (tns->cnt < tns->cols * tns->rows) {
325 tns->first = 0;
326 cnt = tns->cnt;
327 } else {
328 tns_check_view(tns, False);
329 cnt = tns->cols * tns->rows;
330 if ((r = tns->first + cnt - tns->cnt) >= tns->cols)
331 tns->first -= r - r % tns->cols;
332 if (r > 0)
333 cnt -= r % tns->cols;
334 }
335
336 r = cnt % tns->cols ? 1 : 0;
337 tns->x = x = (win->w - MIN(cnt, tns->cols) * thumb_dim) / 2 + 5;
338 tns->y = y = (win->h - (cnt / tns->cols + r) * thumb_dim) / 2 + 5;
339
340 for (i = 0; i < cnt; ++i) {
341 t = &tns->thumbs[tns->first + i];
342 t->x = x + (THUMB_SIZE - t->w) / 2;
343 t->y = y + (THUMB_SIZE - t->h) / 2;
344 imlib_context_set_image(t->im);
345 imlib_render_image_part_on_drawable_at_size(0, 0, t->w, t->h,
346 t->x, t->y, t->w, t->h);
347 if ((i + 1) % tns->cols == 0) {
348 x = tns->x;
349 y += thumb_dim;
350 } else {
351 x += thumb_dim;
352 }
353 }
354
355 tns->dirty = 0;
356 tns_highlight(tns, win, tns->sel, True);
357}
358
359void tns_highlight(tns_t *tns, win_t *win, int n, Bool hl) {
360 thumb_t *t;
361 unsigned long col;
362
363 if (!tns || !tns->thumbs || !win)
364 return;
365
366 if (n >= 0 && n < tns->cnt) {
367 t = &tns->thumbs[n];
368
369 if (hl)
370 col = win->selcol;
371 else if (win->fullscreen)
372 col = win->black;
373 else
374 col = win->bgcol;
375
376 win_draw_rect(win, win->pm, t->x - 2, t->y - 2, t->w + 4, t->h + 4,
377 False, 2, col);
378 }
379
380 win_draw(win);
381}
382
383int tns_move_selection(tns_t *tns, win_t *win, tnsdir_t dir) {
384 int old;
385
386 if (!tns || !tns->thumbs || !win)
387 return 0;
388
389 old = tns->sel;
390
391 switch (dir) {
392 case TNS_LEFT:
393 if (tns->sel > 0)
394 --tns->sel;
395 break;
396 case TNS_RIGHT:
397 if (tns->sel < tns->cnt - 1)
398 ++tns->sel;
399 break;
400 case TNS_UP:
401 if (tns->sel >= tns->cols)
402 tns->sel -= tns->cols;
403 break;
404 case TNS_DOWN:
405 if (tns->sel + tns->cols < tns->cnt)
406 tns->sel += tns->cols;
407 break;
408 }
409
410 if (tns->sel != old) {
411 tns_highlight(tns, win, old, False);
412 tns_check_view(tns, False);
413 if (!tns->dirty)
414 tns_highlight(tns, win, tns->sel, True);
415 }
416
417 return tns->sel != old;
418}
419
420int tns_scroll(tns_t *tns, tnsdir_t dir) {
421 int old;
422
423 if (!tns)
424 return 0;
425
426 old = tns->first;
427
428 if (dir == TNS_DOWN && tns->first + tns->cols * tns->rows < tns->cnt) {
429 tns->first += tns->cols;
430 tns_check_view(tns, True);
431 tns->dirty = 1;
432 } else if (dir == TNS_UP && tns->first >= tns->cols) {
433 tns->first -= tns->cols;
434 tns_check_view(tns, True);
435 tns->dirty = 1;
436 }
437
438 return tns->first != old;
439}
440
441int tns_translate(tns_t *tns, int x, int y) {
442 int n;
443 thumb_t *t;
444
445 if (!tns || !tns->thumbs)
446 return -1;
447
448 if (x < tns->x || y < tns->y)
449 return -1;
450
451 n = tns->first + (y - tns->y) / thumb_dim * tns->cols +
452 (x - tns->x) / thumb_dim;
453
454 if (n < tns->cnt) {
455 t = &tns->thumbs[n];
456 if (x >= t->x && x <= t->x + t->w && y >= t->y && y <= t->y + t->h)
457 return n;
458 }
459
460 return -1;
461}