7 * This software is released under the GNU General Public License (GNU GPL).
8 * Please read the included file COPYING for more information.
9 * This software comes with no warranty of any kind, use at your own risk!
16 #include "slideshow.h"
19 #include "layout_image.h"
20 #include "ui_fileops.h"
23 static void slideshow_timer_reset(SlideShowData *ss, gint reset);
26 void slideshow_free(SlideShowData *ss)
30 slideshow_timer_reset(ss, FALSE);
32 if (ss->stop_func) ss->stop_func(ss, ss->stop_data);
34 if (ss->path_list) path_list_free(ss->path_list);
35 if (ss->cd) collection_unref(ss->cd);
36 g_free(ss->layout_path);
38 g_list_free(ss->list);
39 g_list_free(ss->list_done);
41 g_free(ss->slide_path);
46 static GList *generate_list(SlideShowData *ss)
50 if (ss->from_selection)
52 list = layout_selection_list_by_index(ss->layout);
57 for(i = 0; i < ss->slide_count; i++)
59 list = g_list_prepend(list, GINT_TO_POINTER(i));
61 list = g_list_reverse(list);
67 static GList *generate_random_list(SlideShowData *ss)
69 GList *src_list = NULL;
73 src_list = generate_list(ss);
77 gint p = (double)rand() / ((double)RAND_MAX + 1.0) * g_list_length(src_list);
78 work = g_list_nth(src_list, p);
79 list = g_list_prepend(list, work->data);
80 src_list = g_list_remove(src_list, work->data);
86 static void slideshow_list_init(SlideShowData *ss, gint start_index)
90 g_list_free(ss->list_done);
94 if (ss->list) g_list_free(ss->list);
98 ss->list = generate_random_list(ss);
102 ss->list = generate_list(ss);
103 if (start_index >= 0)
105 /* start with specified image by skipping to it */
108 while(ss->list && i < start_index)
110 ss->list_done = g_list_prepend (ss->list_done, ss->list->data);
111 ss->list = g_list_remove(ss->list, ss->list->data);
118 gint slideshow_should_continue(SlideShowData *ss)
120 const gchar *imd_path;
123 if (!ss) return FALSE;
125 imd_path = image_get_path(ss->imd);
127 if ( ((imd_path == NULL) != (ss->slide_path == NULL)) ||
128 (imd_path && ss->slide_path && strcmp(imd_path, ss->slide_path) != 0) ) return FALSE;
130 if (ss->path_list) return TRUE;
134 if (g_list_length(ss->cd->list) == ss->slide_count)
140 if (!ss->layout) return FALSE;
141 path = layout_get_path(ss->layout);
143 if (path && ss->layout_path &&
144 strcmp(path, ss->layout_path) == 0)
146 if (ss->from_selection && ss->slide_count == layout_selection_count(ss->layout, NULL)) return TRUE;
147 if (!ss->from_selection && ss->slide_count == layout_list_count(ss->layout, NULL)) return TRUE;
153 static gint slideshow_step(SlideShowData *ss, gint forward)
157 if (!slideshow_should_continue(ss))
164 if (!ss->list) return TRUE;
166 row = GPOINTER_TO_INT(ss->list->data);
167 ss->list_done = g_list_prepend (ss->list_done, ss->list->data);
168 ss->list = g_list_remove(ss->list, ss->list->data);
172 if (!ss->list_done || !ss->list_done->next) return TRUE;
174 ss->list = g_list_prepend(ss->list, ss->list_done->data);
175 ss->list_done = g_list_remove(ss->list_done, ss->list_done->data);
176 row = GPOINTER_TO_INT(ss->list_done->data);
179 g_free(ss->slide_path);
180 ss->slide_path = NULL;
184 ss->slide_path = g_strdup(g_list_nth_data(ss->path_list, row));
185 image_change_path(ss->imd, ss->slide_path, image_zoom_get_default(ss->imd, zoom_mode));
191 info = g_list_nth_data(ss->cd->list, row);
192 ss->slide_path = g_strdup(info->path);
194 image_change_from_collection(ss->imd, ss->cd, info, image_zoom_get_default(ss->imd, zoom_mode));
198 ss->slide_path = g_strdup(layout_list_get_path(ss->layout, row));
200 if (ss->from_selection)
202 image_change_path(ss->imd, ss->slide_path, image_zoom_get_default(ss->imd, zoom_mode));
203 layout_status_update_info(ss->layout, NULL);
207 layout_image_set_index(ss->layout, row);
211 if (!ss->list && slideshow_repeat)
213 slideshow_list_init(ss, -1);
223 if (enable_read_ahead)
228 if (!ss->list) return TRUE;
229 r = GPOINTER_TO_INT(ss->list->data);
233 if (!ss->list_done || !ss->list_done->next) return TRUE;
234 r = GPOINTER_TO_INT(ss->list_done->next->data);
239 image_prebuffer_set(ss->imd, g_list_nth_data(ss->path_list, r));
244 info = g_list_nth_data(ss->cd->list, r);
245 if (info) image_prebuffer_set(ss->imd, info->path);
247 else if (ss->from_selection)
249 image_prebuffer_set(ss->imd, layout_list_get_path(ss->layout, r));
256 static gint slideshow_loop_cb(gpointer data)
258 SlideShowData *ss = data;
260 if (ss->paused) return TRUE;
262 if (!slideshow_step(ss, TRUE))
272 static void slideshow_timer_reset(SlideShowData *ss, gint reset)
276 if (slideshow_delay < 1) slideshow_delay = 1;
278 if (ss->timeout_id != -1) g_source_remove(ss->timeout_id);
279 ss->timeout_id = g_timeout_add(slideshow_delay * 1000 / SLIDESHOW_SUBSECOND_PRECISION,
280 slideshow_loop_cb, ss);
282 else if (ss->timeout_id != -1)
284 g_source_remove(ss->timeout_id);
289 void slideshow_next(SlideShowData *ss)
293 if (!slideshow_step(ss, TRUE))
299 slideshow_timer_reset(ss, TRUE);
302 void slideshow_prev(SlideShowData *ss)
306 if (!slideshow_step(ss, FALSE))
312 slideshow_timer_reset(ss, TRUE);
315 static SlideShowData *real_slideshow_start(ImageWindow *imd, LayoutWindow *lw,
316 GList *path_list, gint start_point,
317 CollectionData *cd, CollectInfo *start_info,
318 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
321 gint start_index = -1;
323 if (!path_list && !cd && layout_list_count(lw, NULL) < 1) return NULL;
325 ss = g_new0(SlideShowData, 1);
329 ss->path_list = path_list;
332 ss->layout_path = NULL;
335 ss->list_done = NULL;
337 ss->from_selection = FALSE;
339 ss->stop_func = NULL;
346 ss->slide_count = g_list_length(ss->path_list);
350 collection_ref(ss->cd);
351 ss->slide_count = g_list_length(ss->cd->list);
352 if (!slideshow_random && start_info)
354 start_index = g_list_index(ss->cd->list, start_info);
361 ss->slide_count = layout_selection_count(ss->layout, NULL);
362 ss->layout_path = g_strdup(layout_get_path(ss->layout));
363 if (ss->slide_count < 2)
365 ss->slide_count = layout_list_count(ss->layout, NULL);
366 if (!slideshow_random && start_point >= 0 && start_point < ss->slide_count)
368 start_index = start_point;
373 ss->from_selection = TRUE;
377 slideshow_list_init(ss, start_index);
379 ss->slide_path = g_strdup(image_get_path(ss->imd));
380 if (slideshow_step(ss, TRUE))
382 slideshow_timer_reset(ss, TRUE);
384 ss->stop_func = stop_func;
385 ss->stop_data = stop_data;
396 SlideShowData *slideshow_start_from_path_list(ImageWindow *imd, GList *list,
397 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
399 return real_slideshow_start(imd, NULL, list, -1, NULL, NULL, stop_func, stop_data);
402 SlideShowData *slideshow_start_from_collection(ImageWindow *imd, CollectionData *cd,
403 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data,
404 CollectInfo *start_info)
406 return real_slideshow_start(imd, NULL, NULL, -1, cd, start_info, stop_func, stop_data);
409 SlideShowData *slideshow_start(ImageWindow *imd, LayoutWindow *lw, gint start_point,
410 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
412 return real_slideshow_start(imd, lw, NULL, start_point, NULL, NULL, stop_func, stop_data);
415 gint slideshow_paused(SlideShowData *ss)
417 if (!ss) return FALSE;
422 void slideshow_pause_set(SlideShowData *ss, gint paused)
429 gint slideshow_pause_toggle(SlideShowData *ss)
431 slideshow_pause_set(ss, !slideshow_paused(ss));
432 return slideshow_paused(ss);