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.
25 #include "slideshow.h"
28 #include "layout-image.h"
30 static void slideshow_timer_stop(SlideShowData *ss);
33 void slideshow_free(SlideShowData *ss)
37 slideshow_timer_stop(ss);
39 if (ss->stop_func) ss->stop_func(ss, ss->stop_data);
41 if (ss->filelist) filelist_free(ss->filelist);
42 if (ss->cd) collection_unref(ss->cd);
43 file_data_unref(ss->dir_fd);
45 g_list_free(ss->list);
46 g_list_free(ss->list_done);
48 file_data_unref(ss->slide_fd);
53 static GList *generate_list(SlideShowData *ss)
55 GList *list = nullptr;
57 if (ss->from_selection)
59 list = layout_selection_list_by_index(ss->lw);
64 for (i = 0; i < ss->slide_count; i++)
66 list = g_list_prepend(list, GINT_TO_POINTER(i));
68 list = g_list_reverse(list);
74 static void ptr_array_add(gpointer data, GPtrArray *array)
76 g_ptr_array_add(array, data);
79 static void list_prepend(gpointer data, GList **list)
81 *list = g_list_prepend(*list, data);
84 static GPtrArray *generate_ptr_array_from_list(GList *src_list)
86 GPtrArray *arr = g_ptr_array_sized_new(g_list_length(src_list));
88 g_list_foreach(src_list, reinterpret_cast<GFunc>(ptr_array_add), arr);
93 static void swap(GPtrArray *array, guint index1, guint index2)
95 gpointer temp = g_ptr_array_index(array, index1);
97 g_ptr_array_index(array, index1) = g_ptr_array_index(array, index2);
98 g_ptr_array_index(array, index2) = temp;
101 static void ptr_array_random_shuffle(GPtrArray *array)
104 for (i = 0; i < array->len; ++i)
106 guint p = static_cast<double>(rand()) / (static_cast<double>(RAND_MAX) + 1.0) * array->len;
111 static GList *generate_random_list(SlideShowData *ss)
114 GPtrArray *src_array;
115 GList *list = nullptr;
117 src_list = generate_list(ss);
118 src_array = generate_ptr_array_from_list(src_list);
119 g_list_free(src_list);
121 ptr_array_random_shuffle(src_array);
122 g_ptr_array_foreach(src_array, reinterpret_cast<GFunc>(list_prepend), &list);
123 g_ptr_array_free(src_array, TRUE);
128 static void slideshow_list_init(SlideShowData *ss, gint start_index)
132 g_list_free(ss->list_done);
133 ss->list_done = nullptr;
136 if (ss->list) g_list_free(ss->list);
138 if (options->slideshow.random)
140 ss->list = generate_random_list(ss);
144 ss->list = generate_list(ss);
145 if (start_index >= 0)
147 /* start with specified image by skipping to it */
150 while (ss->list && i < start_index)
152 ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
153 ss->list = g_list_remove(ss->list, ss->list->data);
160 gboolean slideshow_should_continue(SlideShowData *ss)
165 if (!ss) return FALSE;
168 imd_fd = layout_image_get_fd(ss->lw);
170 imd_fd = image_get_fd(ss->imd);
172 if ( ((imd_fd == nullptr) != (ss->slide_fd == nullptr)) ||
173 (imd_fd && ss->slide_fd && imd_fd != ss->slide_fd) ) return FALSE;
175 if (ss->filelist) return TRUE;
179 if (g_list_length(ss->cd->list) == ss->slide_count)
185 dir_fd = ss->lw->dir_fd;
187 if (dir_fd && ss->dir_fd && dir_fd == ss->dir_fd)
189 if (ss->from_selection && ss->slide_count == layout_selection_count(ss->lw, nullptr)) return TRUE;
190 if (!ss->from_selection && ss->slide_count == layout_list_count(ss->lw, nullptr)) return TRUE;
196 static gboolean slideshow_step(SlideShowData *ss, gboolean forward)
200 if (!slideshow_should_continue(ss))
207 if (!ss->list) return TRUE;
209 row = GPOINTER_TO_INT(ss->list->data);
210 ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
211 ss->list = g_list_remove(ss->list, ss->list->data);
215 if (!ss->list_done || !ss->list_done->next) return TRUE;
217 ss->list = g_list_prepend(ss->list, ss->list_done->data);
218 ss->list_done = g_list_remove(ss->list_done, ss->list_done->data);
219 row = GPOINTER_TO_INT(ss->list_done->data);
222 file_data_unref(ss->slide_fd);
223 ss->slide_fd = nullptr;
227 ss->slide_fd = file_data_ref((FileData *)g_list_nth_data(ss->filelist, row));
229 layout_set_fd(ss->lw, ss->slide_fd);
231 image_change_fd(ss->imd, ss->slide_fd, image_zoom_get_default(ss->imd));
237 info = static_cast<CollectInfo *>(g_list_nth_data(ss->cd->list, row));
238 ss->slide_fd = file_data_ref(info->fd);
241 image_change_from_collection(ss->lw->image, ss->cd, info, image_zoom_get_default(ss->lw->image));
243 image_change_from_collection(ss->imd, ss->cd, info, image_zoom_get_default(ss->imd));
247 ss->slide_fd = file_data_ref(layout_list_get_fd(ss->lw, row));
249 if (ss->from_selection)
251 layout_set_fd(ss->lw, ss->slide_fd);
252 layout_status_update_info(ss->lw, nullptr);
256 layout_image_set_index(ss->lw, row);
260 if (!ss->list && options->slideshow.repeat)
262 slideshow_list_init(ss, -1);
271 if (options->image.enable_read_ahead && (!ss->lw || ss->from_selection))
276 if (!ss->list) return TRUE;
277 r = GPOINTER_TO_INT(ss->list->data);
281 if (!ss->list_done || !ss->list_done->next) return TRUE;
282 r = GPOINTER_TO_INT(ss->list_done->next->data);
287 image_prebuffer_set(ss->imd, static_cast<FileData *>(g_list_nth_data(ss->filelist, r)));
292 info = static_cast<CollectInfo *>(g_list_nth_data(ss->cd->list, r));
293 if (info) image_prebuffer_set(ss->imd, info->fd);
295 else if (ss->from_selection)
297 image_prebuffer_set(ss->lw->image, layout_list_get_fd(ss->lw, r));
304 static void slideshow_timer_reset(SlideShowData *ss);
306 static gboolean slideshow_loop_cb(gpointer data)
308 auto ss = static_cast<SlideShowData *>(data);
310 if (ss->paused) return TRUE;
312 if (!slideshow_step(ss, TRUE))
319 /* Check if the user has changed the timer interval */
320 slideshow_timer_reset(ss);
325 static void slideshow_timer_stop(SlideShowData *ss)
327 if (!ss->timeout_id) return;
329 g_source_remove(ss->timeout_id);
333 static void slideshow_timer_reset(SlideShowData *ss)
335 if (options->slideshow.delay < 1) options->slideshow.delay = 1;
337 if (ss->timeout_id) g_source_remove(ss->timeout_id);
338 ss->timeout_id = g_timeout_add(options->slideshow.delay * 1000 / SLIDESHOW_SUBSECOND_PRECISION,
339 slideshow_loop_cb, ss);
342 static void slideshow_move(SlideShowData *ss, gboolean forward)
346 if (!slideshow_step(ss, forward))
352 slideshow_timer_reset(ss);
355 void slideshow_next(SlideShowData *ss)
357 slideshow_move(ss, TRUE);
360 void slideshow_prev(SlideShowData *ss)
362 slideshow_move(ss, FALSE);
365 static SlideShowData *real_slideshow_start(LayoutWindow *target_lw, ImageWindow *imd,
366 GList *filelist, gint start_point,
367 CollectionData *cd, CollectInfo *start_info,
368 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
371 gint start_index = -1;
373 if (!filelist && !cd && layout_list_count(target_lw, nullptr) < 1) return nullptr;
375 ss = g_new0(SlideShowData, 1);
378 ss->imd = imd; /** @FIXME ss->imd is used only for img-view.cc and can be dropped with it */
379 ss->filelist = filelist;
384 ss->slide_count = g_list_length(ss->filelist);
388 collection_ref(ss->cd);
389 ss->slide_count = g_list_length(ss->cd->list);
390 if (!options->slideshow.random && start_info)
392 start_index = g_list_index(ss->cd->list, start_info);
399 ss->slide_count = layout_selection_count(ss->lw, nullptr);
400 ss->dir_fd = file_data_ref(ss->lw->dir_fd);
401 if (ss->slide_count < 2)
403 ss->slide_count = layout_list_count(ss->lw, nullptr);
404 if (!options->slideshow.random && start_point >= 0 && static_cast<guint>(start_point) < ss->slide_count)
406 start_index = start_point;
411 ss->from_selection = TRUE;
415 slideshow_list_init(ss, start_index);
418 ss->slide_fd = file_data_ref(layout_image_get_fd(ss->lw));
420 ss->slide_fd = file_data_ref(image_get_fd(ss->imd));
422 if (slideshow_step(ss, TRUE))
424 slideshow_timer_reset(ss);
426 ss->stop_func = stop_func;
427 ss->stop_data = stop_data;
438 SlideShowData *slideshow_start_from_filelist(LayoutWindow *target_lw, ImageWindow *imd, GList *list,
439 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
441 return real_slideshow_start(target_lw, imd, list, -1, nullptr, nullptr, stop_func, stop_data);
444 SlideShowData *slideshow_start_from_collection(LayoutWindow *target_lw, ImageWindow *imd, CollectionData *cd,
445 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data,
446 CollectInfo *start_info)
448 return real_slideshow_start(target_lw, imd, nullptr, -1, cd, start_info, stop_func, stop_data);
451 SlideShowData *slideshow_start(LayoutWindow *lw, gint start_point,
452 void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
454 return real_slideshow_start(lw, nullptr, nullptr, start_point, nullptr, nullptr, stop_func, stop_data);
457 gboolean slideshow_paused(SlideShowData *ss)
459 if (!ss) return FALSE;
464 void slideshow_pause_set(SlideShowData *ss, gboolean paused)
471 gboolean slideshow_pause_toggle(SlideShowData *ss)
473 slideshow_pause_set(ss, !slideshow_paused(ss));
474 return slideshow_paused(ss);
476 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */