2 * Copyright (C) 2004 John Ellis
3 * Copyright (C) 2008 - 2016 The Geeqie Team
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include "slideshow.h"
30 #include "layout-image.h"
34 static void slideshow_timer_stop(SlideShowData *ss);
37 void slideshow_free(SlideShowData *ss)
41 slideshow_timer_stop(ss);
43 if (ss->stop_func) ss->stop_func(ss, ss->stop_data);
45 if (ss->filelist) filelist_free(ss->filelist);
46 if (ss->cd) collection_unref(ss->cd);
47 file_data_unref(ss->dir_fd);
49 g_list_free(ss->list);
50 g_list_free(ss->list_done);
52 file_data_unref(ss->slide_fd);
57 static GList *generate_list(SlideShowData *ss)
59 GList *list = nullptr;
61 if (ss->from_selection)
63 list = layout_selection_list_by_index(ss->lw);
68 for (i = 0; i < ss->slide_count; i++)
70 list = g_list_prepend(list, GINT_TO_POINTER(i));
72 list = g_list_reverse(list);
78 static void ptr_array_add(gpointer data, GPtrArray *array)
80 g_ptr_array_add(array, data);
83 static void list_prepend(gpointer data, GList **list)
85 *list = g_list_prepend(*list, data);
88 static GPtrArray *generate_ptr_array_from_list(GList *src_list)
90 GPtrArray *arr = g_ptr_array_sized_new(g_list_length(src_list));
92 g_list_foreach(src_list, reinterpret_cast<GFunc>(ptr_array_add), arr);
97 static void ptr_array_random_shuffle(GPtrArray *array)
100 for (i = 0; i < array->len; ++i)
102 guint p = static_cast<double>(rand()) / (static_cast<double>(RAND_MAX) + 1.0) * array->len;
103 std::swap(g_ptr_array_index(array, i), g_ptr_array_index(array, p));
107 static GList *generate_random_list(SlideShowData *ss)
110 GPtrArray *src_array;
111 GList *list = nullptr;
113 src_list = generate_list(ss);
114 src_array = generate_ptr_array_from_list(src_list);
115 g_list_free(src_list);
117 ptr_array_random_shuffle(src_array);
118 g_ptr_array_foreach(src_array, reinterpret_cast<GFunc>(list_prepend), &list);
119 g_ptr_array_free(src_array, TRUE);
124 static void slideshow_list_init(SlideShowData *ss, gint start_index)
128 g_list_free(ss->list_done);
129 ss->list_done = nullptr;
132 if (ss->list) g_list_free(ss->list);
134 if (options->slideshow.random)
136 ss->list = generate_random_list(ss);
140 ss->list = generate_list(ss);
141 if (start_index >= 0)
143 /* start with specified image by skipping to it */
146 while (ss->list && i < start_index)
148 ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
149 ss->list = g_list_remove(ss->list, ss->list->data);
156 gboolean slideshow_should_continue(SlideShowData *ss)
161 if (!ss) return FALSE;
164 imd_fd = layout_image_get_fd(ss->lw);
166 imd_fd = image_get_fd(ss->imd);
168 if ( ((imd_fd == nullptr) != (ss->slide_fd == nullptr)) ||
169 (imd_fd && ss->slide_fd && imd_fd != ss->slide_fd) ) return FALSE;
171 if (ss->filelist) return TRUE;
175 if (g_list_length(ss->cd->list) == ss->slide_count)
181 dir_fd = ss->lw->dir_fd;
183 if (dir_fd && ss->dir_fd && dir_fd == ss->dir_fd)
185 if (ss->from_selection && ss->slide_count == layout_selection_count(ss->lw, nullptr)) return TRUE;
186 if (!ss->from_selection && ss->slide_count == layout_list_count(ss->lw, nullptr)) return TRUE;
192 static gboolean slideshow_step(SlideShowData *ss, gboolean forward)
196 if (!slideshow_should_continue(ss))
203 if (!ss->list) return TRUE;
205 row = GPOINTER_TO_INT(ss->list->data);
206 ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
207 ss->list = g_list_remove(ss->list, ss->list->data);
211 if (!ss->list_done || !ss->list_done->next) return TRUE;
213 ss->list = g_list_prepend(ss->list, ss->list_done->data);
214 ss->list_done = g_list_remove(ss->list_done, ss->list_done->data);
215 row = GPOINTER_TO_INT(ss->list_done->data);
218 file_data_unref(ss->slide_fd);
219 ss->slide_fd = nullptr;
223 ss->slide_fd = file_data_ref((FileData *)g_list_nth_data(ss->filelist, row));
225 layout_set_fd(ss->lw, ss->slide_fd);
227 image_change_fd(ss->imd, ss->slide_fd, image_zoom_get_default(ss->imd));
233 info = static_cast<CollectInfo *>(g_list_nth_data(ss->cd->list, row));
234 ss->slide_fd = file_data_ref(info->fd);
237 image_change_from_collection(ss->lw->image, ss->cd, info, image_zoom_get_default(ss->lw->image));
239 image_change_from_collection(ss->imd, ss->cd, info, image_zoom_get_default(ss->imd));
243 ss->slide_fd = file_data_ref(layout_list_get_fd(ss->lw, row));
245 if (ss->from_selection)
247 layout_set_fd(ss->lw, ss->slide_fd);
248 layout_status_update_info(ss->lw, nullptr);
252 layout_image_set_index(ss->lw, row);
256 if (!ss->list && options->slideshow.repeat)
258 slideshow_list_init(ss, -1);
267 if (options->image.enable_read_ahead && (!ss->lw || ss->from_selection))
272 if (!ss->list) return TRUE;
273 r = GPOINTER_TO_INT(ss->list->data);
277 if (!ss->list_done || !ss->list_done->next) return TRUE;
278 r = GPOINTER_TO_INT(ss->list_done->next->data);
283 image_prebuffer_set(ss->imd, static_cast<FileData *>(g_list_nth_data(ss->filelist, r)));
288 info = static_cast<CollectInfo *>(g_list_nth_data(ss->cd->list, r));
289 if (info) image_prebuffer_set(ss->imd, info->fd);
291 else if (ss->from_selection)
293 image_prebuffer_set(ss->lw->image, layout_list_get_fd(ss->lw, r));
300 static void slideshow_timer_reset(SlideShowData *ss);
302 static gboolean slideshow_loop_cb(gpointer data)
304 auto ss = static_cast<SlideShowData *>(data);
306 if (ss->paused) return TRUE;
308 if (!slideshow_step(ss, TRUE))
315 /* Check if the user has changed the timer interval */
316 slideshow_timer_reset(ss);
321 static void slideshow_timer_stop(SlideShowData *ss)
323 if (!ss->timeout_id) return;
325 g_source_remove(ss->timeout_id);
329 static void slideshow_timer_reset(SlideShowData *ss)
331 if (options->slideshow.delay < 1) options->slideshow.delay = 1;
333 if (ss->timeout_id) g_source_remove(ss->timeout_id);
334 ss->timeout_id = g_timeout_add(options->slideshow.delay * 1000 / SLIDESHOW_SUBSECOND_PRECISION,
335 slideshow_loop_cb, ss);
338 static void slideshow_move(SlideShowData *ss, gboolean forward)
342 if (!slideshow_step(ss, forward))
348 slideshow_timer_reset(ss);
351 void slideshow_next(SlideShowData *ss)
353 slideshow_move(ss, TRUE);
356 void slideshow_prev(SlideShowData *ss)
358 slideshow_move(ss, FALSE);
361 static SlideShowData *real_slideshow_start(LayoutWindow *target_lw, ImageWindow *imd,
362 GList *filelist, gint start_point,
363 CollectionData *cd, CollectInfo *start_info,
364 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
367 gint start_index = -1;
369 if (!filelist && !cd && layout_list_count(target_lw, nullptr) < 1) return nullptr;
371 ss = g_new0(SlideShowData, 1);
374 ss->imd = imd; /** @FIXME ss->imd is used only for img-view.cc and can be dropped with it */
375 ss->filelist = filelist;
380 ss->slide_count = g_list_length(ss->filelist);
384 collection_ref(ss->cd);
385 ss->slide_count = g_list_length(ss->cd->list);
386 if (!options->slideshow.random && start_info)
388 start_index = g_list_index(ss->cd->list, start_info);
395 ss->slide_count = layout_selection_count(ss->lw, nullptr);
396 ss->dir_fd = file_data_ref(ss->lw->dir_fd);
397 if (ss->slide_count < 2)
399 ss->slide_count = layout_list_count(ss->lw, nullptr);
400 if (!options->slideshow.random && start_point >= 0 && static_cast<guint>(start_point) < ss->slide_count)
402 start_index = start_point;
407 ss->from_selection = TRUE;
411 slideshow_list_init(ss, start_index);
414 ss->slide_fd = file_data_ref(layout_image_get_fd(ss->lw));
416 ss->slide_fd = file_data_ref(image_get_fd(ss->imd));
418 if (slideshow_step(ss, TRUE))
420 slideshow_timer_reset(ss);
422 ss->stop_func = stop_func;
423 ss->stop_data = stop_data;
434 SlideShowData *slideshow_start_from_filelist(LayoutWindow *target_lw, ImageWindow *imd, GList *list,
435 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
437 return real_slideshow_start(target_lw, imd, list, -1, nullptr, nullptr, stop_func, stop_data);
440 SlideShowData *slideshow_start_from_collection(LayoutWindow *target_lw, ImageWindow *imd, CollectionData *cd,
441 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data,
442 CollectInfo *start_info)
444 return real_slideshow_start(target_lw, imd, nullptr, -1, cd, start_info, stop_func, stop_data);
447 SlideShowData *slideshow_start(LayoutWindow *lw, gint start_point,
448 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
450 return real_slideshow_start(lw, nullptr, nullptr, start_point, nullptr, nullptr, stop_func, stop_data);
453 gboolean slideshow_paused(SlideShowData *ss)
455 if (!ss) return FALSE;
460 void slideshow_pause_set(SlideShowData *ss, gboolean paused)
467 gboolean slideshow_pause_toggle(SlideShowData *ss)
469 slideshow_pause_set(ss, !slideshow_paused(ss));
470 return slideshow_paused(ss);
472 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */