+++ /dev/null
-/*
- * Copyright (C) 2004 John Ellis
- * Copyright (C) 2008 - 2016 The Geeqie Team
- *
- * Author: John Ellis
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "main.h"
-#include "collect.h"
-#include "image.h"
-#include "slideshow.h"
-#include "filedata.h"
-
-#include "layout.h"
-#include "layout-image.h"
-#include "ui-fileops.h"
-
-
-static void slideshow_timer_stop(SlideShowData *ss);
-
-
-void slideshow_free(SlideShowData *ss)
-{
- if (!ss) return;
-
- slideshow_timer_stop(ss);
-
- if (ss->stop_func) ss->stop_func(ss, ss->stop_data);
-
- if (ss->filelist) filelist_free(ss->filelist);
- if (ss->cd) collection_unref(ss->cd);
- file_data_unref(ss->dir_fd);
-
- g_list_free(ss->list);
- g_list_free(ss->list_done);
-
- file_data_unref(ss->slide_fd);
-
- g_free(ss);
-}
-
-static GList *generate_list(SlideShowData *ss)
-{
- GList *list = NULL;
-
- if (ss->from_selection)
- {
- list = layout_selection_list_by_index(ss->lw);
- }
- else
- {
- guint i;
- for (i = 0; i < ss->slide_count; i++)
- {
- list = g_list_prepend(list, GINT_TO_POINTER(i));
- }
- list = g_list_reverse(list);
- }
-
- return list;
-}
-
-static void ptr_array_add(gpointer data, GPtrArray *array)
-{
- g_ptr_array_add(array, data);
-}
-
-static void list_prepend(gpointer data, GList **list)
-{
- *list = g_list_prepend(*list, data);
-}
-
-static GPtrArray *generate_ptr_array_from_list(GList *src_list)
-{
- GPtrArray *arr = g_ptr_array_sized_new(g_list_length(src_list));
-
- g_list_foreach(src_list, (GFunc) ptr_array_add, arr);
-
- return arr;
-}
-
-static void swap(GPtrArray *array, guint index1, guint index2)
-{
- gpointer temp = g_ptr_array_index(array, index1);
-
- g_ptr_array_index(array, index1) = g_ptr_array_index(array, index2);
- g_ptr_array_index(array, index2) = temp;
-}
-
-static void ptr_array_random_shuffle(GPtrArray *array)
-{
- guint i;
- for (i = 0; i < array->len; ++i)
- {
- guint p = (double)rand() / ((double)RAND_MAX + 1.0) * array->len;
- swap(array, i, p);
- }
-}
-
-static GList *generate_random_list(SlideShowData *ss)
-{
- GList *src_list;
- GPtrArray *src_array;
- GList *list = NULL;
-
- src_list = generate_list(ss);
- src_array = generate_ptr_array_from_list(src_list);
- g_list_free(src_list);
-
- ptr_array_random_shuffle(src_array);
- g_ptr_array_foreach(src_array, (GFunc) list_prepend, &list);
- g_ptr_array_free(src_array, TRUE);
-
- return list;
-}
-
-static void slideshow_list_init(SlideShowData *ss, gint start_index)
-{
- if (ss->list_done)
- {
- g_list_free(ss->list_done);
- ss->list_done = NULL;
- }
-
- if (ss->list) g_list_free(ss->list);
-
- if (options->slideshow.random)
- {
- ss->list = generate_random_list(ss);
- }
- else
- {
- ss->list = generate_list(ss);
- if (start_index >= 0)
- {
- /* start with specified image by skipping to it */
- gint i = 0;
-
- while (ss->list && i < start_index)
- {
- ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
- ss->list = g_list_remove(ss->list, ss->list->data);
- i++;
- }
- }
- }
-}
-
-gboolean slideshow_should_continue(SlideShowData *ss)
-{
- FileData *imd_fd;
- FileData *dir_fd;
-
- if (!ss) return FALSE;
-
- if (ss->lw)
- imd_fd = layout_image_get_fd(ss->lw);
- else
- imd_fd = image_get_fd(ss->imd);
-
- if ( ((imd_fd == NULL) != (ss->slide_fd == NULL)) ||
- (imd_fd && ss->slide_fd && imd_fd != ss->slide_fd) ) return FALSE;
-
- if (ss->filelist) return TRUE;
-
- if (ss->cd)
- {
- if (g_list_length(ss->cd->list) == ss->slide_count)
- return TRUE;
- else
- return FALSE;
- }
-
- dir_fd = ss->lw->dir_fd;
-
- if (dir_fd && ss->dir_fd && dir_fd == ss->dir_fd)
- {
- if (ss->from_selection && ss->slide_count == layout_selection_count(ss->lw, NULL)) return TRUE;
- if (!ss->from_selection && ss->slide_count == layout_list_count(ss->lw, NULL)) return TRUE;
- }
-
- return FALSE;
-}
-
-static gboolean slideshow_step(SlideShowData *ss, gboolean forward)
-{
- gint row;
-
- if (!slideshow_should_continue(ss))
- {
- return FALSE;
- }
-
- if (forward)
- {
- if (!ss->list) return TRUE;
-
- row = GPOINTER_TO_INT(ss->list->data);
- ss->list_done = g_list_prepend(ss->list_done, ss->list->data);
- ss->list = g_list_remove(ss->list, ss->list->data);
- }
- else
- {
- if (!ss->list_done || !ss->list_done->next) return TRUE;
-
- ss->list = g_list_prepend(ss->list, ss->list_done->data);
- ss->list_done = g_list_remove(ss->list_done, ss->list_done->data);
- row = GPOINTER_TO_INT(ss->list_done->data);
- }
-
- file_data_unref(ss->slide_fd);
- ss->slide_fd = NULL;
-
- if (ss->filelist)
- {
- ss->slide_fd = file_data_ref((FileData *)g_list_nth_data(ss->filelist, row));
- if (ss->lw)
- layout_set_fd(ss->lw, ss->slide_fd);
- else
- image_change_fd(ss->imd, ss->slide_fd, image_zoom_get_default(ss->imd));
- }
- else if (ss->cd)
- {
- CollectInfo *info;
-
- info = g_list_nth_data(ss->cd->list, row);
- ss->slide_fd = file_data_ref(info->fd);
-
- if (ss->lw)
- image_change_from_collection(ss->lw->image, ss->cd, info, image_zoom_get_default(ss->lw->image));
- else
- image_change_from_collection(ss->imd, ss->cd, info, image_zoom_get_default(ss->imd));
- }
- else
- {
- ss->slide_fd = file_data_ref(layout_list_get_fd(ss->lw, row));
-
- if (ss->from_selection)
- {
- layout_set_fd(ss->lw, ss->slide_fd);
- layout_status_update_info(ss->lw, NULL);
- }
- else
- {
- layout_image_set_index(ss->lw, row);
- }
- }
-
- if (!ss->list && options->slideshow.repeat)
- {
- slideshow_list_init(ss, -1);
- }
-
- if (!ss->list)
- {
- return FALSE;
- }
-
- /* read ahead */
- if (options->image.enable_read_ahead && (!ss->lw || ss->from_selection))
- {
- gint r;
- if (forward)
- {
- if (!ss->list) return TRUE;
- r = GPOINTER_TO_INT(ss->list->data);
- }
- else
- {
- if (!ss->list_done || !ss->list_done->next) return TRUE;
- r = GPOINTER_TO_INT(ss->list_done->next->data);
- }
-
- if (ss->filelist)
- {
- image_prebuffer_set(ss->imd, g_list_nth_data(ss->filelist, r));
- }
- else if (ss->cd)
- {
- CollectInfo *info;
- info = g_list_nth_data(ss->cd->list, r);
- if (info) image_prebuffer_set(ss->imd, info->fd);
- }
- else if (ss->from_selection)
- {
- image_prebuffer_set(ss->lw->image, layout_list_get_fd(ss->lw, r));
- }
- }
-
- return TRUE;
-}
-
-static void slideshow_timer_reset(SlideShowData *ss);
-
-static gboolean slideshow_loop_cb(gpointer data)
-{
- SlideShowData *ss = data;
-
- if (ss->paused) return TRUE;
-
- if (!slideshow_step(ss, TRUE))
- {
- ss->timeout_id = 0;
- slideshow_free(ss);
- return FALSE;
- }
-
- /* Check if the user has changed the timer interval */
- slideshow_timer_reset(ss);
-
- return TRUE;
-}
-
-static void slideshow_timer_stop(SlideShowData *ss)
-{
- if (!ss->timeout_id) return;
-
- g_source_remove(ss->timeout_id);
- ss->timeout_id = 0;
-}
-
-static void slideshow_timer_reset(SlideShowData *ss)
-{
- if (options->slideshow.delay < 1) options->slideshow.delay = 1;
-
- if (ss->timeout_id) g_source_remove(ss->timeout_id);
- ss->timeout_id = g_timeout_add(options->slideshow.delay * 1000 / SLIDESHOW_SUBSECOND_PRECISION,
- slideshow_loop_cb, ss);
-}
-
-static void slideshow_move(SlideShowData *ss, gboolean forward)
-{
- if (!ss) return;
-
- if (!slideshow_step(ss, forward))
- {
- slideshow_free(ss);
- return;
- }
-
- slideshow_timer_reset(ss);
-}
-
-void slideshow_next(SlideShowData *ss)
-{
- slideshow_move(ss, TRUE);
-}
-
-void slideshow_prev(SlideShowData *ss)
-{
- slideshow_move(ss, FALSE);
-}
-
-static SlideShowData *real_slideshow_start(LayoutWindow *target_lw, ImageWindow *imd,
- GList *filelist, gint start_point,
- CollectionData *cd, CollectInfo *start_info,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
-{
- SlideShowData *ss;
- gint start_index = -1;
-
- if (!filelist && !cd && layout_list_count(target_lw, NULL) < 1) return NULL;
-
- ss = g_new0(SlideShowData, 1);
-
- ss->lw = target_lw;
- ss->imd = imd; /** @FIXME ss->imd is used only for img-view.c and can be dropped with it */
- ss->filelist = filelist;
- ss->cd = cd;
-
- if (ss->filelist)
- {
- ss->slide_count = g_list_length(ss->filelist);
- }
- else if (ss->cd)
- {
- collection_ref(ss->cd);
- ss->slide_count = g_list_length(ss->cd->list);
- if (!options->slideshow.random && start_info)
- {
- start_index = g_list_index(ss->cd->list, start_info);
- }
- }
- else
- {
- /* layout method */
-
- ss->slide_count = layout_selection_count(ss->lw, NULL);
- ss->dir_fd = file_data_ref(ss->lw->dir_fd);
- if (ss->slide_count < 2)
- {
- ss->slide_count = layout_list_count(ss->lw, NULL);
- if (!options->slideshow.random && start_point >= 0 && (guint) start_point < ss->slide_count)
- {
- start_index = start_point;
- }
- }
- else
- {
- ss->from_selection = TRUE;
- }
- }
-
- slideshow_list_init(ss, start_index);
-
- if (ss->lw)
- ss->slide_fd = file_data_ref(layout_image_get_fd(ss->lw));
- else
- ss->slide_fd = file_data_ref(image_get_fd(ss->imd));
-
- if (slideshow_step(ss, TRUE))
- {
- slideshow_timer_reset(ss);
-
- ss->stop_func = stop_func;
- ss->stop_data = stop_data;
- }
- else
- {
- slideshow_free(ss);
- ss = NULL;
- }
-
- return ss;
-}
-
-SlideShowData *slideshow_start_from_filelist(LayoutWindow *target_lw, ImageWindow *imd, GList *list,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
-{
- return real_slideshow_start(target_lw, imd, list, -1, NULL, NULL, stop_func, stop_data);
-}
-
-SlideShowData *slideshow_start_from_collection(LayoutWindow *target_lw, ImageWindow *imd, CollectionData *cd,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data,
- CollectInfo *start_info)
-{
- return real_slideshow_start(target_lw, imd, NULL, -1, cd, start_info, stop_func, stop_data);
-}
-
-SlideShowData *slideshow_start(LayoutWindow *lw, gint start_point,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
-{
- return real_slideshow_start(lw, NULL, NULL, start_point, NULL, NULL, stop_func, stop_data);
-}
-
-gboolean slideshow_paused(SlideShowData *ss)
-{
- if (!ss) return FALSE;
-
- return ss->paused;
-}
-
-void slideshow_pause_set(SlideShowData *ss, gboolean paused)
-{
- if (!ss) return;
-
- ss->paused = paused;
-}
-
-gboolean slideshow_pause_toggle(SlideShowData *ss)
-{
- slideshow_pause_set(ss, !slideshow_paused(ss));
- return slideshow_paused(ss);
-}
-/* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */
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