4 * Copyright (C) 2008 The Geeqie Team
8 * This software is released under the GNU General Public License (GNU GPL).
9 * Please read the included file COPYING for more information.
10 * This software comes with no warranty of any kind, use at your own risk!
17 #include "slideshow.h"
21 #include "layout_image.h"
22 #include "ui_fileops.h"
25 static void slideshow_timer_stop(SlideShowData *ss);
28 void slideshow_free(SlideShowData *ss)
32 slideshow_timer_stop(ss);
34 if (ss->stop_func) ss->stop_func(ss, ss->stop_data);
36 if (ss->filelist) filelist_free(ss->filelist);
37 if (ss->cd) collection_unref(ss->cd);
38 file_data_unref(ss->dir_fd);
40 g_list_free(ss->list);
41 g_list_free(ss->list_done);
43 file_data_unref(ss->slide_fd);
48 static GList *generate_list(SlideShowData *ss)
52 if (ss->from_selection)
54 list = layout_selection_list_by_index(ss->layout);
59 for (i = 0; i < ss->slide_count; i++)
61 list = g_list_prepend(list, GINT_TO_POINTER(i));
63 list = g_list_reverse(list);
69 static GList *generate_random_list(SlideShowData *ss)
71 GList *src_list = NULL;
75 src_list = generate_list(ss);
79 gint p = (gdouble)rand() / ((gdouble)RAND_MAX + 1.0) * g_list_length(src_list);
80 work = g_list_nth(src_list, p);
81 list = g_list_prepend(list, work->data);
82 src_list = g_list_remove(src_list, work->data);
88 static void slideshow_list_init(SlideShowData *ss, gint start_index)
92 g_list_free(ss->list_done);
96 if (ss->list) g_list_free(ss->list);
98 if (options->slideshow.random)
100 ss->list = generate_random_list(ss);
104 ss->list = generate_list(ss);
105 if (start_index >= 0)
107 /* start with specified image by skipping to it */
110 while (ss->list && i < start_index)
112 ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
113 ss->list = g_list_remove(ss->list, ss->list->data);
120 gint slideshow_should_continue(SlideShowData *ss)
125 if (!ss) return FALSE;
127 imd_fd = image_get_fd(ss->imd);
129 if ( ((imd_fd == NULL) != (ss->slide_fd == NULL)) ||
130 (imd_fd && ss->slide_fd && imd_fd != ss->slide_fd) ) return FALSE;
132 if (ss->filelist) return TRUE;
136 if (g_list_length(ss->cd->list) == ss->slide_count)
142 if (!ss->layout) return FALSE;
143 dir_fd = ss->layout->dir_fd;
145 if (dir_fd && ss->dir_fd && dir_fd == ss->dir_fd)
147 if (ss->from_selection && ss->slide_count == layout_selection_count(ss->layout, NULL)) return TRUE;
148 if (!ss->from_selection && ss->slide_count == layout_list_count(ss->layout, NULL)) return TRUE;
154 static gint slideshow_step(SlideShowData *ss, gboolean forward)
158 if (!slideshow_should_continue(ss))
165 if (!ss->list) return TRUE;
167 row = GPOINTER_TO_INT(ss->list->data);
168 ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
169 ss->list = g_list_remove(ss->list, ss->list->data);
173 if (!ss->list_done || !ss->list_done->next) return TRUE;
175 ss->list = g_list_prepend(ss->list, ss->list_done->data);
176 ss->list_done = g_list_remove(ss->list_done, ss->list_done->data);
177 row = GPOINTER_TO_INT(ss->list_done->data);
180 file_data_unref(ss->slide_fd);
185 ss->slide_fd = file_data_ref((FileData *)g_list_nth_data(ss->filelist, row));
186 image_change_fd(ss->imd, ss->slide_fd, image_zoom_get_default(ss->imd));
192 info = g_list_nth_data(ss->cd->list, row);
193 ss->slide_fd = file_data_ref(info->fd);
195 image_change_from_collection(ss->imd, ss->cd, info, image_zoom_get_default(ss->imd));
199 ss->slide_fd = file_data_ref(layout_list_get_fd(ss->layout, row));
201 if (ss->from_selection)
203 image_change_fd(ss->imd, ss->slide_fd, image_zoom_get_default(ss->imd));
204 layout_status_update_info(ss->layout, NULL);
208 layout_image_set_index(ss->layout, row);
212 if (!ss->list && options->slideshow.repeat)
214 slideshow_list_init(ss, -1);
224 if (options->image.enable_read_ahead)
229 if (!ss->list) return TRUE;
230 r = GPOINTER_TO_INT(ss->list->data);
234 if (!ss->list_done || !ss->list_done->next) return TRUE;
235 r = GPOINTER_TO_INT(ss->list_done->next->data);
240 image_prebuffer_set(ss->imd, g_list_nth_data(ss->filelist, r));
245 info = g_list_nth_data(ss->cd->list, r);
246 if (info) image_prebuffer_set(ss->imd, info->fd);
248 else if (ss->from_selection)
250 image_prebuffer_set(ss->imd, layout_list_get_fd(ss->layout, r));
257 static gint slideshow_loop_cb(gpointer data)
259 SlideShowData *ss = data;
261 if (ss->paused) return TRUE;
263 if (!slideshow_step(ss, TRUE))
273 static void slideshow_timer_stop(SlideShowData *ss)
275 if (ss->timeout_id == -1) return;
277 g_source_remove(ss->timeout_id);
281 static void slideshow_timer_reset(SlideShowData *ss)
283 if (options->slideshow.delay < 1) options->slideshow.delay = 1;
285 if (ss->timeout_id != -1) g_source_remove(ss->timeout_id);
286 ss->timeout_id = g_timeout_add(options->slideshow.delay * 1000 / SLIDESHOW_SUBSECOND_PRECISION,
287 slideshow_loop_cb, ss);
290 static void slideshow_move(SlideShowData *ss, gboolean forward)
294 if (!slideshow_step(ss, forward))
300 slideshow_timer_reset(ss);
303 void slideshow_next(SlideShowData *ss)
305 slideshow_move(ss, TRUE);
308 void slideshow_prev(SlideShowData *ss)
310 slideshow_move(ss, FALSE);
313 static SlideShowData *real_slideshow_start(ImageWindow *imd, LayoutWindow *lw,
314 GList *filelist, gint start_point,
315 CollectionData *cd, CollectInfo *start_info,
316 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
319 gint start_index = -1;
321 if (!filelist && !cd && layout_list_count(lw, NULL) < 1) return NULL;
323 ss = g_new0(SlideShowData, 1);
327 ss->filelist = filelist;
333 ss->list_done = NULL;
335 ss->from_selection = FALSE;
337 ss->stop_func = NULL;
344 ss->slide_count = g_list_length(ss->filelist);
348 collection_ref(ss->cd);
349 ss->slide_count = g_list_length(ss->cd->list);
350 if (!options->slideshow.random && start_info)
352 start_index = g_list_index(ss->cd->list, start_info);
359 ss->slide_count = layout_selection_count(ss->layout, NULL);
360 ss->dir_fd = file_data_ref(ss->layout->dir_fd);
361 if (ss->slide_count < 2)
363 ss->slide_count = layout_list_count(ss->layout, NULL);
364 if (!options->slideshow.random && start_point >= 0 && (guint) start_point < ss->slide_count)
366 start_index = start_point;
371 ss->from_selection = TRUE;
375 slideshow_list_init(ss, start_index);
377 ss->slide_fd = file_data_ref(image_get_fd(ss->imd));
378 if (slideshow_step(ss, TRUE))
380 slideshow_timer_reset(ss);
382 ss->stop_func = stop_func;
383 ss->stop_data = stop_data;
394 SlideShowData *slideshow_start_from_filelist(ImageWindow *imd, GList *list,
395 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
397 return real_slideshow_start(imd, NULL, list, -1, NULL, NULL, stop_func, stop_data);
400 SlideShowData *slideshow_start_from_collection(ImageWindow *imd, CollectionData *cd,
401 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data,
402 CollectInfo *start_info)
404 return real_slideshow_start(imd, NULL, NULL, -1, cd, start_info, stop_func, stop_data);
407 SlideShowData *slideshow_start(ImageWindow *imd, LayoutWindow *lw, gint start_point,
408 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
410 return real_slideshow_start(imd, lw, NULL, start_point, NULL, NULL, stop_func, stop_data);
413 gint slideshow_paused(SlideShowData *ss)
415 if (!ss) return FALSE;
420 void slideshow_pause_set(SlideShowData *ss, gint paused)
427 gint slideshow_pause_toggle(SlideShowData *ss)
429 slideshow_pause_set(ss, !slideshow_paused(ss));
430 return slideshow_paused(ss);