summaryrefslogtreecommitdiff
path: root/src/slideshow.c
blob: b3f99aa1191f9012ab43340ca8086761c2e0d680 (plain)
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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
/* slideshow.c

Copyright (C) 1999-2003 Tom Gilbert.
Copyright (C) 2010-2011 Daniel Friesel.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies of the Software and its documentation and acknowledgment shall be
given in the documentation and software packages that this Software was
used.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

#include "feh.h"
#include "filelist.h"
#include "timers.h"
#include "winwidget.h"
#include "options.h"
#include "signals.h"

void init_slideshow_mode(void)
{
	winwidget w = NULL;
	int success = 0;
	char *s = NULL;
	gib_list *l = filelist, *last = NULL;
	feh_file *file = NULL;

	for (l = filelist; l && opt.start_list_at; l = l->next) {
		if (!strcmp(opt.start_list_at, FEH_FILE(l->data)->filename)) {
			opt.start_list_at = NULL;
			break;
		}
	}

	if (opt.start_list_at)
		eprintf("--start-at %s: File not found in filelist",
				opt.start_list_at);

	mode = "slideshow";
	for (; l; l = l->next) {
		file = FEH_FILE(l->data);
		if (last) {
			filelist = feh_file_remove_from_list(filelist, last);
			last = NULL;
		}
		current_file = l;
		s = slideshow_create_name(file);
		if ((w = winwidget_create_from_file(l, s, WIN_TYPE_SLIDESHOW)) != NULL) {
			free(s);
			success = 1;
			winwidget_show(w);
			if (opt.slideshow_delay > 0.0)
				feh_add_timer(cb_slide_timer, w, opt.slideshow_delay, "SLIDE_CHANGE");
			else if (opt.reload > 0)
				feh_add_unique_timer(cb_reload_timer, w, opt.reload);
			break;
		} else {
			free(s);
			last = l;
		}
	}
	if (!success)
		show_mini_usage();

	setup_signal_handlers();

	return;
}

void cb_slide_timer(void *data)
{
	slideshow_change_image((winwidget) data, SLIDE_NEXT, 1);
	return;
}

void cb_reload_timer(void *data)
{
	gib_list *l;
	char *current_filename;

	winwidget w = (winwidget) data;

	// save the current filename for refinding it in new list
	current_filename = estrdup(FEH_FILE(current_file->data)->filename);
	gib_list_free_and_data(filelist);
	filelist = NULL;
	filelist_len = 0;
	current_file = NULL;

	// rebuild filelist from original_file_items
	if (gib_list_length(original_file_items) > 0)
		for (l = gib_list_last(original_file_items); l; l = l->prev)
			add_file_to_filelist_recursively(l->data, FILELIST_FIRST);
	else if (!opt.filelistfile && !opt.bgmode)
		add_file_to_filelist_recursively(".", FILELIST_FIRST);
	
	if (!(filelist_len = gib_list_length(filelist))) {
		fprintf(stderr, "No files found to reload.\n");
		exit(1);
	}

	// find the previously current file
	for (l = filelist; l; l = l->next)
		if (strcmp(FEH_FILE(l->data)->filename, current_filename) == 0) {
			current_file = l;
			break;
		}

	free(current_filename);

	filelist = gib_list_first(gib_list_reverse(filelist));

	if (!current_file)
		current_file = filelist;
	w->file = current_file;

	// reset window name in case of current file order,
	// filename, or filelist_length has changed.
	current_filename = slideshow_create_name(FEH_FILE(current_file->data));
	winwidget_rename(w, current_filename);
	free(current_filename);

	feh_reload_image(w, 1, 0);
	feh_add_unique_timer(cb_reload_timer, w, opt.reload);
	return;
}

void feh_reload_image(winwidget w, int resize, int force_new)
{
	char *title, *new_title;
	int len;
	Imlib_Image tmp;
	int old_w, old_h;

	if (!w->file) {
		im_weprintf(w, "couldn't reload, this image has no file associated with it.");
		return;
	}

	D(("resize %d, force_new %d\n", resize, force_new));

	free(FEH_FILE(w->file->data)->caption);
	FEH_FILE(w->file->data)->caption = NULL;

	len = strlen(w->name) + sizeof("Reloading: ") + 1;
	new_title = emalloc(len);
	snprintf(new_title, len, "Reloading: %s", w->name);
	title = estrdup(w->name);
	winwidget_rename(w, new_title);

	old_w = gib_imlib_image_get_width(w->im);
	old_h = gib_imlib_image_get_height(w->im);

	/* force imlib2 not to cache */
	winwidget_free_image(w);

	/* if the image has changed in dimensions - we gotta resize */
	if ((feh_load_image(&tmp, FEH_FILE(w->file->data))) == 0) {
		if (force_new) {
			eprintf("failed to reload image\n");
		} else {
			im_weprintf(w, "Couldn't reload image. Is it still there?");
		}
		winwidget_rename(w, title);
		free(title);
		free(new_title);
		filelist = feh_file_remove_from_list(filelist, w->file);
		return;
	}

	if (!resize && ((old_w != gib_imlib_image_get_width(tmp)) ||
			(old_h != gib_imlib_image_get_height(tmp))))
		resize = 1;

	w->im = tmp;
	winwidget_reset_image(w);

	w->mode = MODE_NORMAL;
	if ((w->im_w != gib_imlib_image_get_width(w->im))
	    || (w->im_h != gib_imlib_image_get_height(w->im)))
		w->had_resize = 1;
	if (w->has_rotated) {
		Imlib_Image temp;

		temp = gib_imlib_create_rotated_image(w->im, 0.0);
		w->im_w = gib_imlib_image_get_width(temp);
		w->im_h = gib_imlib_image_get_height(temp);
		gib_imlib_free_image_and_decache(temp);
	} else {
		w->im_w = gib_imlib_image_get_width(w->im);
		w->im_h = gib_imlib_image_get_height(w->im);
	}
	winwidget_render_image(w, resize, 0);

	winwidget_rename(w, title);
	free(title);
	free(new_title);

	return;
}

void slideshow_change_image(winwidget winwid, int change, int render)
{
	gib_list *last = NULL;
	int i = 0;
	int jmp = 1;
	/* We can't use filelist_len in the for loop, since that changes when we
	 * encounter invalid images.
	 */
	int our_filelist_len = filelist_len;
	char *s;

	/* Without this, clicking a one-image slideshow reloads it. Not very *
	   intelligent behaviour :-) */
	if (filelist_len < 2 && opt.cycle_once == 0)
		return;

	/* Ok. I do this in such an odd way to ensure that if the last or first *
	   image is not loadable, it will go through in the right direction to *
	   find the correct one. Otherwise SLIDE_LAST would try the last file, *
	   then loop forward to find a loadable one. */
	if (change == SLIDE_FIRST) {
		current_file = gib_list_last(filelist);
		change = SLIDE_NEXT;
	} else if (change == SLIDE_LAST) {
		current_file = filelist;
		change = SLIDE_PREV;
	}

	/* The for loop prevents us looping infinitely */
	for (i = 0; i < our_filelist_len; i++) {
		winwidget_free_image(winwid);
		switch (change) {
		case SLIDE_NEXT:
			current_file = feh_list_jump(filelist, current_file, FORWARD, 1);
			break;
		case SLIDE_PREV:
			current_file = feh_list_jump(filelist, current_file, BACK, 1);
			break;
		case SLIDE_RAND:
			current_file = feh_list_jump(filelist, current_file, FORWARD, rand() % filelist_len);
			change = SLIDE_NEXT;
			break;
		case SLIDE_JUMP_FWD:
			if (filelist_len < 5)
				jmp = 1;
			else if (filelist_len < 40)
				jmp = 2;
			else
				jmp = filelist_len / 20;
			if (!jmp)
				jmp = 2;
			current_file = feh_list_jump(filelist, current_file, FORWARD, jmp);
			/* important. if the load fails, we only want to step on ONCE to
			   try the next file, not another jmp */
			change = SLIDE_NEXT;
			break;
		case SLIDE_JUMP_BACK:
			if (filelist_len < 5)
				jmp = 1;
			else if (filelist_len < 40)
				jmp = 2;
			else
				jmp = filelist_len / 20;
			if (!jmp)
				jmp = 2;
			current_file = feh_list_jump(filelist, current_file, BACK, jmp);
			/* important. if the load fails, we only want to step back ONCE to
			   try the previous file, not another jmp */
			change = SLIDE_NEXT;
			break;
		default:
			eprintf("BUG!\n");
			break;
		}

		if (last) {
			filelist = feh_file_remove_from_list(filelist, last);
			last = NULL;
		}

		if ((winwidget_loadimage(winwid, FEH_FILE(current_file->data)))
		    != 0) {
			winwid->mode = MODE_NORMAL;
			winwid->file = current_file;
			if ((winwid->im_w != gib_imlib_image_get_width(winwid->im))
			    || (winwid->im_h != gib_imlib_image_get_height(winwid->im)))
				winwid->had_resize = 1;
			winwidget_reset_image(winwid);
			winwid->im_w = gib_imlib_image_get_width(winwid->im);
			winwid->im_h = gib_imlib_image_get_height(winwid->im);
			if (render)
				winwidget_render_image(winwid, 1, 0);

			s = slideshow_create_name(FEH_FILE(current_file->data));
			winwidget_rename(winwid, s);
			free(s);

			break;
		} else
			last = current_file;
	}
	if (last)
		filelist = feh_file_remove_from_list(filelist, last);

	if (filelist_len == 0)
		eprintf("No more slides in show");

	if (opt.slideshow_delay > 0.0)
		feh_add_timer(cb_slide_timer, winwid, opt.slideshow_delay, "SLIDE_CHANGE");
	return;
}

void slideshow_pause_toggle(winwidget w)
{
	if (!opt.paused) {
		opt.paused = 1;
	} else {
		opt.paused = 0;
	}

	winwidget_rename(w, NULL);
}

char *slideshow_create_name(feh_file * file)
{
	char *s = NULL;
	int len = 0;

	if (!opt.title) {
		len = strlen(PACKAGE " [slideshow mode] - ") + strlen(file->filename) + 1;
		s = emalloc(len);
		snprintf(s, len, PACKAGE " [%d of %d] - %s",
			gib_list_num(filelist, current_file) + 1, gib_list_length(filelist), file->filename);
	} else {
		s = estrdup(feh_printf(opt.title, file));
	}

	return(s);
}

void feh_action_run(feh_file * file, char *action)
{
	if (action) {
		char *sys;
		D(("Running action %s\n", action));
		sys = feh_printf(action, file);

		if (opt.verbose && !opt.list && !opt.customlist)
			fprintf(stderr, "Running action -->%s<--\n", sys);
		system(sys);
	}
	return;
}

char *feh_printf(char *str, feh_file * file)
{
	char *c;
	char buf[20];
	static char ret[4096];

	ret[0] = '\0';

	for (c = str; *c != '\0'; c++) {
		if (*c == '%') {
			c++;
			switch (*c) {
			case 'f':
				if (file)
					strcat(ret, file->filename);
				break;
			case 'n':
				if (file)
					strcat(ret, file->name);
				break;
			case 'w':
				if (file) {
					if (!file->info)
						feh_file_info_load(file, NULL);
					snprintf(buf, sizeof(buf), "%d", file->info->width);
					strcat(ret, buf);
				}
				break;
			case 'h':
				if (file) {
					if (!file->info)
						feh_file_info_load(file, NULL);
					snprintf(buf, sizeof(buf), "%d", file->info->height);
					strcat(ret, buf);
				}
				break;
			case 's':
				if (file) {
					if (!file->info)
						feh_file_info_load(file, NULL);
					snprintf(buf, sizeof(buf), "%d", file->info->size);
					strcat(ret, buf);
				}
				break;
			case 'p':
				if (file) {
					if (!file->info)
						feh_file_info_load(file, NULL);
					snprintf(buf, sizeof(buf), "%d", file->info->pixels);
					strcat(ret, buf);
				}
				break;
			case 't':
				if (file) {
					if (!file->info)
						feh_file_info_load(file, NULL);
					strcat(ret, file->info->format);
				}
				break;
			case 'P':
				strcat(ret, PACKAGE);
				break;
			case 'v':
				strcat(ret, VERSION);
				break;
			case 'm':
				strcat(ret, mode);
				break;
			case 'l':
				snprintf(buf, sizeof(buf), "%d", gib_list_length(filelist));
				strcat(ret, buf);
				break;
			case 'u':
				snprintf(buf, sizeof(buf), "%d",
					 current_file != NULL ? gib_list_num(filelist, current_file)
					 + 1 : 0);
				strcat(ret, buf);
				break;
			default:
				strncat(ret, c, 1);
				break;
			}
		} else if (*c == '\\') {
			c++;
			switch (*c) {
			case 'n':
				strcat(ret, "\n");
				break;
			default:
				strncat(ret, c, 1);
				break;
			}
		} else
			strncat(ret, c, 1);
	}
	return(ret);
}

void feh_filelist_image_remove(winwidget winwid, char do_delete)
{
	if (winwid->type == WIN_TYPE_SLIDESHOW) {
		char *s;
		gib_list *doomed;

		doomed = current_file;
		slideshow_change_image(winwid, SLIDE_NEXT, 0);
		if (do_delete)
			filelist = feh_file_rm_and_free(filelist, doomed);
		else
			filelist = feh_file_remove_from_list(filelist, doomed);
		if (!filelist) {
			/* No more images. Game over ;-) */
			winwidget_destroy(winwid);
			return;
		}
		s = slideshow_create_name(FEH_FILE(winwid->file->data));
		winwidget_rename(winwid, s);
		free(s);
		winwidget_render_image(winwid, 1, 0);
	} else if ((winwid->type == WIN_TYPE_SINGLE)
		   || (winwid->type == WIN_TYPE_THUMBNAIL_VIEWER)) {
		if (do_delete)
			filelist = feh_file_rm_and_free(filelist, winwid->file);
		else
			filelist = feh_file_remove_from_list(filelist, winwid->file);
		winwidget_destroy(winwid);
	}
}

void slideshow_save_image(winwidget win)
{
	char *tmpname;
	Imlib_Load_Error err;

	if (win->file) {
		tmpname = feh_unique_filename("", FEH_FILE(win->file->data)->name);
	} else if (mode) {
		char *tmp;
		tmp = estrjoin(".", mode, "png", NULL);
		tmpname = feh_unique_filename("", tmp);
		free(tmp);
	} else {
		tmpname = feh_unique_filename("", "noname.png");
	}

	if (!opt.quiet)
		printf("saving image to filename '%s'\n", tmpname);

	/* XXX gib_imlib_save_image_with_error_return breaks with *.XXX and
	 * similar because it tries to set the image format, which only works
	 * with .xxx .
	 * So we leave that part out.
	 */
	imlib_context_set_image(win->im);
	imlib_save_image_with_error_return(tmpname, &err);

	if (err)
		im_weprintf(win, "Can't save image %s:", tmpname);

	free(tmpname);
	return;
}

gib_list *feh_list_jump(gib_list * root, gib_list * l, int direction, int num)
{
	int i;
	gib_list *ret = NULL;

	if (!root)
		return (NULL);
	if (!l)
		return (root);

	ret = l;

	for (i = 0; i < num; i++) {
		if (direction == FORWARD) {
			if (ret->next) {
				ret = ret->next;
			} else {
				if (opt.cycle_once) {
					exit(0);
				}
				ret = root;
			}
		} else {
			if (ret->prev)
				ret = ret->prev;
			else
				ret = gib_list_last(ret);
		}
	}
	return (ret);
}