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nsxivthumbs.c

456 lines · 9.4 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
30const int thumb_dim = THUMB_SIZE + 10;
31char *cache_dir = NULL;
32
33int tns_cache_enabled() {
34 struct stat stats;
35
36 return cache_dir && !stat(cache_dir, &stats) && S_ISDIR(stats.st_mode) &&
37 !access(cache_dir, W_OK);
38}
39
40char* tns_cache_filename(const char *filename) {
41 size_t len;
42 char *cfile = NULL;
43 const char *abspath;
44
45 if (!cache_dir || !filename)
46 return NULL;
47
48 if (*filename != '/') {
49 if (!(abspath = absolute_path(filename)))
50 return NULL;
51 } else {
52 abspath = filename;
53 }
54
55 if (strncmp(abspath, cache_dir, strlen(cache_dir))) {
56 len = strlen(cache_dir) + strlen(abspath) + 6;
57 cfile = (char*) s_malloc(len);
58 snprintf(cfile, len, "%s/%s.png", cache_dir, abspath + 1);
59 }
60
61 if (abspath != filename)
62 free((void*) abspath);
63
64 return cfile;
65}
66
67Imlib_Image* tns_cache_load(const char *filename) {
68 char *cfile;
69 struct stat cstats, fstats;
70 Imlib_Image *im = NULL;
71
72 if (!filename)
73 return NULL;
74
75 if (stat(filename, &fstats))
76 return NULL;
77
78 if ((cfile = tns_cache_filename(filename))) {
79 if (!stat(cfile, &cstats) &&
80 cstats.st_mtim.tv_sec == fstats.st_mtim.tv_sec &&
81 cstats.st_mtim.tv_nsec / 1000 == fstats.st_mtim.tv_nsec / 1000)
82 {
83 im = imlib_load_image(cfile);
84 }
85 free(cfile);
86 }
87
88 return im;
89}
90
91void tns_cache_write(thumb_t *t, Bool force) {
92 char *cfile, *dirend;
93 struct stat cstats, fstats;
94 struct timeval times[2];
95 Imlib_Load_Error err = 0;
96
97 if (!t || !t->im || !t->filename)
98 return;
99
100 if (stat(t->filename, &fstats))
101 return;
102
103 if ((cfile = tns_cache_filename(t->filename))) {
104 if (force || stat(cfile, &cstats) ||
105 cstats.st_mtim.tv_sec != fstats.st_mtim.tv_sec ||
106 cstats.st_mtim.tv_nsec / 1000 != fstats.st_mtim.tv_nsec / 1000)
107 {
108 if ((dirend = strrchr(cfile, '/'))) {
109 *dirend = '\0';
110 err = r_mkdir(cfile);
111 *dirend = '/';
112 }
113
114 if (!err) {
115 imlib_context_set_image(t->im);
116 imlib_image_set_format("png");
117 imlib_save_image_with_error_return(cfile, &err);
118 }
119
120 if (err) {
121 warn("could not cache thumbnail: %s", t->filename);
122 } else {
123 TIMESPEC_TO_TIMEVAL(&times[0], &fstats.st_atim);
124 TIMESPEC_TO_TIMEVAL(&times[1], &fstats.st_mtim);
125 utimes(cfile, times);
126 }
127 }
128 free(cfile);
129 }
130}
131
132void tns_clean_cache(tns_t *tns) {
133 int dirlen, delete;
134 char *cfile, *filename, *tpos;
135 r_dir_t dir;
136
137 if (!cache_dir)
138 return;
139
140 if (r_opendir(&dir, cache_dir)) {
141 warn("could not open thumbnail cache directory: %s", cache_dir);
142 return;
143 }
144
145 dirlen = strlen(cache_dir);
146
147 while ((cfile = r_readdir(&dir))) {
148 filename = cfile + dirlen;
149 delete = 0;
150
151 if ((tpos = strrchr(filename, '.'))) {
152 *tpos = '\0';
153 delete = access(filename, F_OK);
154 *tpos = '.';
155 }
156
157 if (delete && unlink(cfile))
158 warn("could not delete cache file: %s", cfile);
159
160 free(cfile);
161 }
162
163 r_closedir(&dir);
164}
165
166
167void tns_init(tns_t *tns, int cnt) {
168 int len;
169 char *homedir;
170
171 if (!tns)
172 return;
173
174 if (cnt) {
175 tns->thumbs = (thumb_t*) s_malloc(cnt * sizeof(thumb_t));
176 memset(tns->thumbs, 0, cnt * sizeof(thumb_t));
177 } else {
178 tns->thumbs = NULL;
179 }
180
181 tns->cnt = tns->first = tns->sel = 0;
182 tns->cap = cnt;
183 tns->dirty = 0;
184
185 if ((homedir = getenv("HOME"))) {
186 if (cache_dir)
187 free(cache_dir);
188 len = strlen(homedir) + 10;
189 cache_dir = (char*) s_malloc(len * sizeof(char));
190 snprintf(cache_dir, len, "%s/.sxiv", homedir);
191 } else {
192 warn("could not locate thumbnail cache directory");
193 }
194}
195
196void tns_free(tns_t *tns) {
197 int i;
198
199 if (!tns)
200 return;
201
202 if (tns->thumbs) {
203 for (i = 0; i < tns->cnt; ++i) {
204 if (tns->thumbs[i].im) {
205 imlib_context_set_image(tns->thumbs[i].im);
206 imlib_free_image();
207 }
208 }
209 free(tns->thumbs);
210 tns->thumbs = NULL;
211 }
212
213 if (cache_dir) {
214 free(cache_dir);
215 cache_dir = NULL;
216 }
217}
218
219int tns_load(tns_t *tns, int n, const char *filename, unsigned char silent) {
220 int w, h;
221 int use_cache, cached = 0;
222 float z, zw, zh;
223 thumb_t *t;
224 Imlib_Image *im;
225
226 if (!tns || !tns->thumbs || !filename)
227 return 0;
228
229 if (n < 0 || n >= tns->cap)
230 return 0;
231
232 t = &tns->thumbs[n];
233 t->filename = filename;
234
235 if (t->im) {
236 imlib_context_set_image(t->im);
237 imlib_free_image();
238 }
239
240 if ((use_cache = tns_cache_enabled())) {
241 if ((im = tns_cache_load(filename)))
242 cached = 1;
243 }
244
245 if (!cached &&
246 (access(filename, R_OK) || !(im = imlib_load_image(filename))))
247 {
248 if (!silent)
249 warn("could not open image: %s", filename);
250 return 0;
251 }
252
253 imlib_context_set_image(im);
254 imlib_context_set_anti_alias(1);
255
256 w = imlib_image_get_width();
257 h = imlib_image_get_height();
258 zw = (float) THUMB_SIZE / (float) w;
259 zh = (float) THUMB_SIZE / (float) h;
260 z = MIN(zw, zh);
261 t->w = z * w;
262 t->h = z * h;
263
264 if (!(t->im = imlib_create_cropped_scaled_image(0, 0, w, h, t->w, t->h)))
265 die("could not allocate memory");
266
267 imlib_free_image_and_decache();
268
269 if (use_cache && !cached)
270 tns_cache_write(t, False);
271
272 tns->dirty = 1;
273 return 1;
274}
275
276void tns_check_view(tns_t *tns, Bool scrolled) {
277 int r;
278
279 if (!tns)
280 return;
281
282 tns->first -= tns->first % tns->cols;
283 r = tns->sel % tns->cols;
284
285 if (scrolled) {
286 /* move selection into visible area */
287 if (tns->sel >= tns->first + tns->cols * tns->rows)
288 tns->sel = tns->first + r + tns->cols * (tns->rows - 1);
289 else if (tns->sel < tns->first)
290 tns->sel = tns->first + r;
291 } else {
292 /* scroll to selection */
293 if (tns->first + tns->cols * tns->rows <= tns->sel) {
294 tns->first = tns->sel - r - tns->cols * (tns->rows - 1);
295 tns->dirty = 1;
296 } else if (tns->first > tns->sel) {
297 tns->first = tns->sel - r;
298 tns->dirty = 1;
299 }
300 }
301}
302
303void tns_render(tns_t *tns, win_t *win) {
304 int i, cnt, r, x, y;
305 thumb_t *t;
306
307 if (!tns || !tns->thumbs || !win)
308 return;
309
310 if (!tns->dirty)
311 return;
312
313 win_clear(win);
314 imlib_context_set_drawable(win->pm);
315
316 tns->cols = MAX(1, win->w / thumb_dim);
317 tns->rows = MAX(1, win->h / thumb_dim);
318
319 if (tns->cnt < tns->cols * tns->rows) {
320 tns->first = 0;
321 cnt = tns->cnt;
322 } else {
323 tns_check_view(tns, False);
324 cnt = tns->cols * tns->rows;
325 if ((r = tns->first + cnt - tns->cnt) >= tns->cols)
326 tns->first -= r - r % tns->cols;
327 if (r > 0)
328 cnt -= r % tns->cols;
329 }
330
331 r = cnt % tns->cols ? 1 : 0;
332 tns->x = x = (win->w - MIN(cnt, tns->cols) * thumb_dim) / 2 + 5;
333 tns->y = y = (win->h - (cnt / tns->cols + r) * thumb_dim) / 2 + 5;
334
335 for (i = 0; i < cnt; ++i) {
336 t = &tns->thumbs[tns->first + i];
337 t->x = x + (THUMB_SIZE - t->w) / 2;
338 t->y = y + (THUMB_SIZE - t->h) / 2;
339 imlib_context_set_image(t->im);
340 imlib_render_image_part_on_drawable_at_size(0, 0, t->w, t->h,
341 t->x, t->y, t->w, t->h);
342 if ((i + 1) % tns->cols == 0) {
343 x = tns->x;
344 y += thumb_dim;
345 } else {
346 x += thumb_dim;
347 }
348 }
349
350 tns->dirty = 0;
351 tns_highlight(tns, win, tns->sel, True);
352}
353
354void tns_highlight(tns_t *tns, win_t *win, int n, Bool hl) {
355 thumb_t *t;
356 unsigned long col;
357
358 if (!tns || !tns->thumbs || !win)
359 return;
360
361 if (n >= 0 && n < tns->cnt) {
362 t = &tns->thumbs[n];
363
364 if (hl)
365 col = win->selcol;
366 else if (win->fullscreen)
367 col = win->black;
368 else
369 col = win->bgcol;
370
371 win_draw_rect(win, win->pm, t->x - 2, t->y - 2, t->w + 4, t->h + 4,
372 False, 2, col);
373 }
374
375 win_draw(win);
376}
377
378int tns_move_selection(tns_t *tns, win_t *win, tnsdir_t dir) {
379 int old;
380
381 if (!tns || !tns->thumbs || !win)
382 return 0;
383
384 old = tns->sel;
385
386 switch (dir) {
387 case TNS_LEFT:
388 if (tns->sel > 0)
389 --tns->sel;
390 break;
391 case TNS_RIGHT:
392 if (tns->sel < tns->cnt - 1)
393 ++tns->sel;
394 break;
395 case TNS_UP:
396 if (tns->sel >= tns->cols)
397 tns->sel -= tns->cols;
398 break;
399 case TNS_DOWN:
400 if (tns->sel + tns->cols < tns->cnt)
401 tns->sel += tns->cols;
402 break;
403 }
404
405 if (tns->sel != old) {
406 tns_highlight(tns, win, old, False);
407 tns_check_view(tns, False);
408 if (!tns->dirty)
409 tns_highlight(tns, win, tns->sel, True);
410 }
411
412 return tns->sel != old;
413}
414
415int tns_scroll(tns_t *tns, tnsdir_t dir) {
416 int old;
417
418 if (!tns)
419 return 0;
420
421 old = tns->first;
422
423 if (dir == TNS_DOWN && tns->first + tns->cols * tns->rows < tns->cnt) {
424 tns->first += tns->cols;
425 tns_check_view(tns, True);
426 tns->dirty = 1;
427 } else if (dir == TNS_UP && tns->first >= tns->cols) {
428 tns->first -= tns->cols;
429 tns_check_view(tns, True);
430 tns->dirty = 1;
431 }
432
433 return tns->first != old;
434}
435
436int tns_translate(tns_t *tns, int x, int y) {
437 int n;
438 thumb_t *t;
439
440 if (!tns || !tns->thumbs)
441 return -1;
442
443 if (x < tns->x || y < tns->y)
444 return -1;
445
446 n = tns->first + (y - tns->y) / thumb_dim * tns->cols +
447 (x - tns->x) / thumb_dim;
448
449 if (n < tns->cnt) {
450 t = &tns->thumbs[n];
451 if (x >= t->x && x <= t->x + t->w && y >= t->y && y <= t->y + t->h)
452 return n;
453 }
454
455 return -1;
456}