+++ /dev/null
-/*
- * GQview
- * (C) 2004 John Ellis
- *
- * Author: John Ellis
- *
- * This software is released under the GNU General Public License (GNU GPL).
- * Please read the included file COPYING for more information.
- * This software comes with no warranty of any kind, use at your own risk!
- */
-
-
-#include "gqview.h"
-#include "collect.h"
-#include "image.h"
-#include "slideshow.h"
-
-#include "layout.h"
-#include "layout_image.h"
-#include "ui_fileops.h"
-
-
-static void slideshow_timer_reset(SlideShowData *ss, gint reset);
-
-
-void slideshow_free(SlideShowData *ss)
-{
- if (!ss) return;
-
- slideshow_timer_reset(ss, FALSE);
-
- if (ss->stop_func) ss->stop_func(ss, ss->stop_data);
-
- if (ss->path_list) path_list_free(ss->path_list);
- if (ss->cd) collection_unref(ss->cd);
- g_free(ss->layout_path);
-
- g_list_free(ss->list);
- g_list_free(ss->list_done);
-
- g_free(ss->slide_path);
-
- g_free(ss);
-}
-
-static GList *generate_list(SlideShowData *ss)
-{
- GList *list = NULL;
-
- if (ss->from_selection)
- {
- list = layout_selection_list_by_index(ss->layout);
- }
- else
- {
- gint 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 GList *generate_random_list(SlideShowData *ss)
-{
- GList *src_list = NULL;
- GList *list = NULL;
- GList *work;
-
- src_list = generate_list(ss);
-
- while(src_list)
- {
- gint p = (double)rand() / ((double)RAND_MAX + 1.0) * g_list_length(src_list);
- work = g_list_nth(src_list, p);
- list = g_list_prepend(list, work->data);
- src_list = g_list_remove(src_list, work->data);
- }
-
- 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 (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++;
- }
- }
- }
-}
-
-gint slideshow_should_continue(SlideShowData *ss)
-{
- const gchar *imd_path;
- const gchar *path;
-
- if (!ss) return FALSE;
-
- imd_path = image_get_path(ss->imd);
-
- if ( ((imd_path == NULL) != (ss->slide_path == NULL)) ||
- (imd_path && ss->slide_path && strcmp(imd_path, ss->slide_path) != 0) ) return FALSE;
-
- if (ss->path_list) return TRUE;
-
- if (ss->cd)
- {
- if (g_list_length(ss->cd->list) == ss->slide_count)
- return TRUE;
- else
- return FALSE;
- }
-
- if (!ss->layout) return FALSE;
- path = layout_get_path(ss->layout);
-
- if (path && ss->layout_path &&
- strcmp(path, ss->layout_path) == 0)
- {
- if (ss->from_selection && ss->slide_count == layout_selection_count(ss->layout, NULL)) return TRUE;
- if (!ss->from_selection && ss->slide_count == layout_list_count(ss->layout, NULL)) return TRUE;
- }
-
- return FALSE;
-}
-
-static gint slideshow_step(SlideShowData *ss, gint 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);
- }
-
- g_free(ss->slide_path);
- ss->slide_path = NULL;
-
- if (ss->path_list)
- {
- ss->slide_path = g_strdup(g_list_nth_data(ss->path_list, row));
- image_change_path(ss->imd, ss->slide_path, image_zoom_get_default(ss->imd, zoom_mode));
- }
- else if (ss->cd)
- {
- CollectInfo *info;
-
- info = g_list_nth_data(ss->cd->list, row);
- ss->slide_path = g_strdup(info->path);
-
- image_change_from_collection(ss->imd, ss->cd, info, image_zoom_get_default(ss->imd, zoom_mode));
- }
- else
- {
- ss->slide_path = g_strdup(layout_list_get_path(ss->layout, row));
-
- if (ss->from_selection)
- {
- image_change_path(ss->imd, ss->slide_path, image_zoom_get_default(ss->imd, zoom_mode));
- layout_status_update_info(ss->layout, NULL);
- }
- else
- {
- layout_image_set_index(ss->layout, row);
- }
- }
-
- if (!ss->list && slideshow_repeat)
- {
- slideshow_list_init(ss, -1);
- }
-
- if (!ss->list)
- {
- return FALSE;
- }
-
- /* read ahead */
-
- if (enable_read_ahead)
- {
- 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->path_list)
- {
- image_prebuffer_set(ss->imd, g_list_nth_data(ss->path_list, r));
- }
- else if (ss->cd)
- {
- CollectInfo *info;
- info = g_list_nth_data(ss->cd->list, r);
- if (info) image_prebuffer_set(ss->imd, info->path);
- }
- else if (ss->from_selection)
- {
- image_prebuffer_set(ss->imd, layout_list_get_path(ss->layout, r));
- }
- }
-
- return TRUE;
-}
-
-static gint slideshow_loop_cb(gpointer data)
-{
- SlideShowData *ss = data;
-
- if (ss->paused) return TRUE;
-
- if (!slideshow_step(ss, TRUE))
- {
- ss->timeout_id = -1;
- slideshow_free(ss);
- return FALSE;
- }
-
- return TRUE;
-}
-
-static void slideshow_timer_reset(SlideShowData *ss, gint reset)
-{
- if (reset)
- {
- if (slideshow_delay < 1) slideshow_delay = 1;
-
- if (ss->timeout_id != -1) g_source_remove(ss->timeout_id);
- ss->timeout_id = g_timeout_add(slideshow_delay * 1000 / SLIDESHOW_SUBSECOND_PRECISION,
- slideshow_loop_cb, ss);
- }
- else if (ss->timeout_id != -1)
- {
- g_source_remove(ss->timeout_id);
- ss->timeout_id = -1;
- }
-}
-
-void slideshow_next(SlideShowData *ss)
-{
- if (!ss) return;
-
- if (!slideshow_step(ss, TRUE))
- {
- slideshow_free(ss);
- return;
- }
-
- slideshow_timer_reset(ss, TRUE);
-}
-
-void slideshow_prev(SlideShowData *ss)
-{
- if (!ss) return;
-
- if (!slideshow_step(ss, FALSE))
- {
- slideshow_free(ss);
- return;
- }
-
- slideshow_timer_reset(ss, TRUE);
-}
-
-static SlideShowData *real_slideshow_start(ImageWindow *imd, LayoutWindow *lw,
- GList *path_list, gint start_point,
- CollectionData *cd, CollectInfo *start_info,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
-{
- SlideShowData *ss;
- gint start_index = -1;
-
- if (!path_list && !cd && layout_list_count(lw, NULL) < 1) return NULL;
-
- ss = g_new0(SlideShowData, 1);
-
- ss->imd = imd;
-
- ss->path_list = path_list;
- ss->cd = cd;
- ss->layout = lw;
- ss->layout_path = NULL;
-
- ss->list = NULL;
- ss->list_done = NULL;
-
- ss->from_selection = FALSE;
-
- ss->stop_func = stop_func;
- ss->stop_data = stop_data;
-
- ss->timeout_id = -1;
-
- ss->paused = FALSE;
-
- if (ss->path_list)
- {
- ss->slide_count = g_list_length(ss->path_list);
- }
- else if (ss->cd)
- {
- collection_ref(ss->cd);
- ss->slide_count = g_list_length(ss->cd->list);
- if (!slideshow_random && start_info)
- {
- start_index = g_list_index(ss->cd->list, start_info);
- }
- }
- else
- {
- /* layout method */
-
- ss->slide_count = layout_selection_count(ss->layout, NULL);
- ss->layout_path = g_strdup(layout_get_path(ss->layout));
- if (ss->slide_count < 2)
- {
- ss->slide_count = layout_list_count(ss->layout, NULL);
- if (!slideshow_random && start_point >= 0 && start_point < ss->slide_count)
- {
- start_index = start_point;
- }
- }
- else
- {
- ss->from_selection = TRUE;
- }
- }
-
- slideshow_list_init(ss, start_index);
-
- ss->slide_path = g_strdup(image_get_path(ss->imd));
- if (slideshow_step(ss, TRUE))
- {
- slideshow_timer_reset(ss, TRUE);
- }
- else
- {
- ss = NULL;
- }
-
- return ss;
-}
-
-SlideShowData *slideshow_start_from_path_list(ImageWindow *imd, GList *list,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
-{
- return real_slideshow_start(imd, NULL, list, -1, NULL, NULL, stop_func, stop_data);
-}
-
-SlideShowData *slideshow_start_from_collection(ImageWindow *imd, CollectionData *cd,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data,
- CollectInfo *start_info)
-{
- return real_slideshow_start(imd, NULL, NULL, -1, cd, start_info, stop_func, stop_data);
-}
-
-SlideShowData *slideshow_start(ImageWindow *imd, LayoutWindow *lw, gint start_point,
- void (*stop_func)(SlideShowData *, gpointer), gpointer stop_data)
-{
- return real_slideshow_start(imd, lw, NULL, start_point, NULL, NULL, stop_func, stop_data);
-}
-
-gint slideshow_paused(SlideShowData *ss)
-{
- if (!ss) return FALSE;
-
- return ss->paused;
-}
-
-void slideshow_pause_set(SlideShowData *ss, gint paused)
-{
- if (!ss) return;
-
- ss->paused = paused;
-}
-
-gint slideshow_pause_toggle(SlideShowData *ss)
-{
- slideshow_pause_set(ss, !slideshow_paused(ss));
- return slideshow_paused(ss);
-}
-
-
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