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image_list.c
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/*
* Copyright (c) Stephan Arts 2006-2012 <[email protected]>
*
* 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.
*
* Sorting-algorithm taken from the thunar filemanager.
* Copyright (c) Benedict Meurer <[email protected]>
*/
#include "util.h"
#include "image_list.h"
#include "main_window.h"
#include "thumbnailer.h"
#include <glib/gi18n.h>
#define FILE_BLOCK_SIZE 10000
#define ERROR_LOAD_DIR_NO_VALID_FILE _("No supported image type found in the directory")
#define ERROR_LOAD_DIR_PARTIAL _("Directory only partially loaded")
#define ERROR_LOAD_DIR_FAILED _("Could not load directory")
#define ERROR_INVALID_FILE _("Unsupported mime type")
enum
{
RSTTO_IMAGE_LIST_SIGNAL_REMOVE_ALL,
RSTTO_IMAGE_LIST_SIGNAL_SORTED,
RSTTO_IMAGE_LIST_SIGNAL_COUNT
};
enum
{
RSTTO_IMAGE_LIST_ITER_SIGNAL_CHANGED = 0,
RSTTO_IMAGE_LIST_ITER_SIGNAL_PREPARE_CHANGE,
RSTTO_IMAGE_LIST_ITER_SIGNAL_COUNT
};
static gint rstto_image_list_signals[RSTTO_IMAGE_LIST_SIGNAL_COUNT];
static gint rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_COUNT];
/* RsttoImageList */
static void
rstto_image_list_finalize (GObject *object);
static void
rstto_image_list_monitor_dir (RsttoImageList *image_list,
GFile *dir);
static void
rstto_image_list_remove_all (RsttoImageList *image_list);
static gboolean
rstto_image_list_set_directory_idle (gpointer data);
static void
rstto_image_list_set_compare_func (RsttoImageList *image_list,
GCompareDataFunc func);
static gint
cb_rstto_image_list_image_name_compare_func (gconstpointer a,
gconstpointer b,
gpointer user_data);
static gint
cb_rstto_image_list_image_type_compare_func (gconstpointer a,
gconstpointer b,
gpointer user_data);
static gint
cb_rstto_image_list_exif_date_compare_func (gconstpointer a,
gconstpointer b,
gpointer user_data);
static void
cb_file_monitor_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data);
static void
cb_rstto_wrap_images_changed (GObject *settings,
GParamSpec *pspec,
gpointer user_data);
static void
cb_rstto_thumbnailer_ready (RsttoThumbnailer *thumbnailer,
RsttoFile *file,
gpointer user_data);
/* RsttoImageListIter */
static void
rstto_image_list_iter_finalize (GObject *object);
static RsttoImageListIter *
rstto_image_list_iter_new (RsttoImageList *nav,
RsttoFile *r_file);
static gboolean
iter_next (RsttoImageListIter *iter,
gboolean sticky);
static gboolean
iter_previous (RsttoImageListIter *iter,
gboolean sticky);
static void
iter_set_position (RsttoImageListIter *iter,
gint pos,
gboolean sticky);
/* TreeModelIface */
static void
rstto_image_list_tree_model_init (GtkTreeModelIface *iface);
static GtkTreeModelFlags
image_list_model_get_flags (GtkTreeModel *tree_model);
static gint
image_list_model_get_n_columns (GtkTreeModel *tree_model);
static GType
image_list_model_get_column_type (GtkTreeModel *tree_model,
gint index_);
static gboolean
image_list_model_get_iter (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreePath *path);
static GtkTreePath *
image_list_model_get_path (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static void
image_list_model_get_value (GtkTreeModel *tree_model,
GtkTreeIter *iter,
gint column,
GValue *value);
static gboolean
image_list_model_iter_children (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent);
static gboolean
image_list_model_iter_has_child (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gboolean
image_list_model_iter_parent (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *child);
static gint
image_list_model_iter_n_children (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gboolean
image_list_model_iter_nth_child (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent,
gint n);
static gboolean
image_list_model_iter_next (GtkTreeModel *tree_model,
GtkTreeIter *iter);
struct _RsttoImageListIterPrivate
{
RsttoImageList *image_list;
RsttoFile *r_file;
GList *link;
gint index;
gboolean sticky;
};
struct _RsttoImageListPrivate
{
RsttoSettings *settings;
RsttoThumbnailer *thumbnailer;
GFileMonitor *dir_monitor;
GList *image_monitors;
GQueue *images;
GSList *iterators;
GCompareDataFunc cb_rstto_image_list_compare_func;
gboolean wrap_images;
gboolean is_busy;
gint stamp;
};
G_DEFINE_TYPE_WITH_CODE (RsttoImageList, rstto_image_list, G_TYPE_OBJECT,
G_ADD_PRIVATE (RsttoImageList)
G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_MODEL,
rstto_image_list_tree_model_init))
G_DEFINE_TYPE_WITH_PRIVATE (RsttoImageListIter, rstto_image_list_iter, G_TYPE_OBJECT)
static void
rstto_image_list_tree_model_init (GtkTreeModelIface *iface)
{
iface->get_flags = image_list_model_get_flags;
iface->get_n_columns = image_list_model_get_n_columns;
iface->get_column_type = image_list_model_get_column_type;
iface->get_iter = image_list_model_get_iter;
iface->get_path = image_list_model_get_path;
iface->get_value = image_list_model_get_value;
iface->iter_children = image_list_model_iter_children;
iface->iter_has_child = image_list_model_iter_has_child;
iface->iter_n_children = image_list_model_iter_n_children;
iface->iter_nth_child = image_list_model_iter_nth_child;
iface->iter_parent = image_list_model_iter_parent;
iface->iter_next = image_list_model_iter_next;
}
static void
rstto_image_list_init (RsttoImageList *image_list)
{
image_list->priv = rstto_image_list_get_instance_private (image_list);
image_list->priv->stamp = g_random_int ();
image_list->priv->is_busy = FALSE;
image_list->priv->settings = rstto_settings_new ();
image_list->priv->thumbnailer = rstto_thumbnailer_new ();
image_list->priv->images = g_queue_new ();
image_list->priv->cb_rstto_image_list_compare_func = cb_rstto_image_list_image_name_compare_func;
image_list->priv->wrap_images =
rstto_settings_get_boolean_property (image_list->priv->settings, "wrap-images");
g_signal_connect (image_list->priv->settings, "notify::wrap-images",
G_CALLBACK (cb_rstto_wrap_images_changed), image_list);
g_signal_connect (image_list->priv->thumbnailer, "ready",
G_CALLBACK (cb_rstto_thumbnailer_ready), image_list);
g_signal_connect (image_list->priv->thumbnailer, "error",
G_CALLBACK (cb_rstto_thumbnailer_ready), image_list);
}
static void
rstto_image_list_class_init (RsttoImageListClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = rstto_image_list_finalize;
rstto_image_list_signals[RSTTO_IMAGE_LIST_SIGNAL_REMOVE_ALL] =
g_signal_new ("remove-all",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
0, NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
rstto_image_list_signals[RSTTO_IMAGE_LIST_SIGNAL_SORTED] =
g_signal_new ("sorted",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0, NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
rstto_image_list_finalize (GObject *object)
{
RsttoImageList *image_list = RSTTO_IMAGE_LIST (object);
if (NULL != image_list->priv)
{
if (image_list->priv->settings)
{
g_object_unref (image_list->priv->settings);
image_list->priv->settings = NULL;
}
if (image_list->priv->thumbnailer)
{
g_object_unref (image_list->priv->thumbnailer);
image_list->priv->thumbnailer = NULL;
}
if (image_list->priv->image_monitors)
{
g_list_free_full (image_list->priv->image_monitors, g_object_unref);
image_list->priv->image_monitors = NULL;
}
if (image_list->priv->images)
{
g_queue_free_full (image_list->priv->images, g_object_unref);
image_list->priv->images = NULL;
}
}
G_OBJECT_CLASS (rstto_image_list_parent_class)->finalize (object);
}
RsttoImageList *
rstto_image_list_new (void)
{
RsttoImageList *image_list;
image_list = g_object_new (RSTTO_TYPE_IMAGE_LIST, NULL);
return image_list;
}
gboolean
rstto_image_list_add_file (RsttoImageList *image_list,
RsttoFile *r_file,
GError **error)
{
RsttoImageListIter *r_iter;
GtkTreePath *path;
GtkTreeIter t_iter;
GFileMonitor *monitor;
GSList *iter;
gint idx = 0;
g_return_val_if_fail (RSTTO_IS_FILE (r_file), FALSE);
/* file already added */
if (g_queue_find (image_list->priv->images, r_file))
return TRUE;
/* unsupported mime type */
if (!rstto_file_is_valid (r_file))
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, ERROR_INVALID_FILE);
return FALSE;
}
g_queue_insert_sorted (image_list->priv->images, g_object_ref (r_file),
image_list->priv->cb_rstto_image_list_compare_func, NULL);
if (image_list->priv->dir_monitor == NULL)
{
monitor = g_file_monitor_file (rstto_file_get_file (r_file),
G_FILE_MONITOR_WATCH_MOVES, NULL, NULL);
if (monitor != NULL)
{
g_signal_connect (monitor, "changed",
G_CALLBACK (cb_file_monitor_changed), image_list);
image_list->priv->image_monitors =
g_list_prepend (image_list->priv->image_monitors, monitor);
}
}
path = gtk_tree_path_new ();
idx = g_queue_index (image_list->priv->images, r_file);
gtk_tree_path_append_index (path, idx);
t_iter.stamp = image_list->priv->stamp;
t_iter.user_data = r_file;
t_iter.user_data3 = GINT_TO_POINTER (idx);
gtk_tree_model_row_inserted (GTK_TREE_MODEL (image_list), path, &t_iter);
gtk_tree_path_free (path);
for (iter = image_list->priv->iterators; iter != NULL; iter = iter->next)
{
r_iter = iter->data;
if (!r_iter->priv->sticky)
{
rstto_image_list_iter_find_file (iter->data, r_file);
r_iter->priv->sticky = TRUE;
}
else
rstto_image_list_iter_find_file (r_iter, r_iter->priv->r_file);
}
return TRUE;
}
gint
rstto_image_list_get_n_images (RsttoImageList *image_list)
{
return image_list->priv->images->length;
}
gboolean
rstto_image_list_is_empty (RsttoImageList *image_list)
{
return g_queue_is_empty (image_list->priv->images);
}
/**
* rstto_image_list_get_iter:
* @image_list:
*
* TODO: track iterators
*
* return iter;
*/
RsttoImageListIter *
rstto_image_list_get_iter (RsttoImageList *image_list)
{
RsttoFile *r_file = NULL;
RsttoImageListIter *iter = NULL;
if (!g_queue_is_empty (image_list->priv->images))
{
r_file = image_list->priv->images->head->data;
}
iter = rstto_image_list_iter_new (image_list, r_file);
image_list->priv->iterators = g_slist_prepend (image_list->priv->iterators, iter);
return iter;
}
void
rstto_image_list_remove_file (RsttoImageList *image_list,
RsttoFile *r_file)
{
RsttoImageListIter *r_iter;
GSList *iter;
GtkTreePath *path_;
gint index_;
index_ = g_queue_index (image_list->priv->images, r_file);
if (index_ == -1)
return;
for (iter = image_list->priv->iterators; iter != NULL; iter = iter->next)
{
r_iter = iter->data;
if (r_iter->priv->r_file != r_file)
continue;
if (r_iter->priv->link == image_list->priv->images->tail)
iter_previous (r_iter, FALSE);
else
iter_next (r_iter, FALSE);
}
if (image_list->priv->images->length == 1)
{
rstto_image_list_remove_all (image_list);
return;
}
else
{
g_queue_remove (image_list->priv->images, r_file);
g_object_unref (r_file);
}
path_ = gtk_tree_path_new ();
gtk_tree_path_append_index (path_, index_);
gtk_tree_model_row_deleted (GTK_TREE_MODEL (image_list), path_);
gtk_tree_path_free (path_);
for (iter = image_list->priv->iterators; iter != NULL; iter = iter->next)
{
r_iter = iter->data;
rstto_image_list_iter_find_file (r_iter, r_iter->priv->r_file);
}
}
static void
rstto_image_list_remove_all (RsttoImageList *image_list)
{
GSList *iter;
g_list_free_full (image_list->priv->image_monitors, g_object_unref);
image_list->priv->image_monitors = NULL;
g_queue_free_full (image_list->priv->images, g_object_unref);
image_list->priv->images = g_queue_new ();
for (iter = image_list->priv->iterators; iter != NULL; iter = iter->next)
iter_set_position (iter->data, -1, FALSE);
g_signal_emit (image_list,
rstto_image_list_signals[RSTTO_IMAGE_LIST_SIGNAL_REMOVE_ALL],
0, NULL);
}
static gboolean
rstto_image_list_set_directory_finish_idle (gpointer data)
{
RsttoImageList *image_list;
RsttoFile *r_file;
GtkFileFilter *filter;
GtkFileFilterInfo filter_info;
GFileEnumerator *file_enum = data;
GList *info_list, *li;
GFile *file, *loaded_file = NULL;
filter = rstto_main_window_get_app_file_filter ();
filter_info.contains = GTK_FILE_FILTER_MIME_TYPE;
image_list = rstto_object_get_data (file_enum, "image-list");
info_list = rstto_object_get_data (file_enum, "info-list");
r_file = rstto_object_get_data (file_enum, "loaded-file");
if (r_file != NULL)
loaded_file = rstto_file_get_file (r_file);
for (li = info_list; li != NULL; li = li->next)
{
filter_info.mime_type = g_file_info_get_attribute_string (li->data, G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE);
if (filter_info.mime_type != NULL && gtk_file_filter_filter (filter, &filter_info))
{
/* skip already loaded file, if any */
file = g_file_enumerator_get_child (file_enum, li->data);
if (loaded_file != NULL && g_file_equal (file, loaded_file))
{
loaded_file = NULL;
rstto_object_set_data (file_enum, "loaded-file", NULL);
g_object_unref (file);
continue;
}
/* load the first valid file, if needed */
r_file = rstto_file_new (file);
g_object_unref (file);
if (loaded_file == NULL && g_queue_is_empty (image_list->priv->images))
{
if (!rstto_image_list_add_file (image_list, r_file, NULL))
{
g_object_unref (r_file);
continue;
}
else
{
/* give the viewer a chance to display the image first */
rstto_object_set_data (file_enum, "loaded-file", r_file);
g_idle_add (rstto_image_list_set_directory_finish_idle, file_enum);
g_object_unref (r_file);
return FALSE;
}
}
/* no additional filtering here, it will be done gradually when validating files,
* and the mime type will be refined at this time as well */
rstto_file_set_content_type (r_file, filter_info.mime_type);
g_queue_push_head (image_list->priv->images, r_file);
}
}
/* schedule next file block, if any */
if (g_list_length (info_list) == FILE_BLOCK_SIZE)
g_idle_add (rstto_image_list_set_directory_idle, file_enum);
else
{
/* we're done, inform the others */
image_list->priv->is_busy = FALSE;
if (!g_queue_is_empty (image_list->priv->images))
rstto_image_list_set_compare_func (image_list,
image_list->priv->cb_rstto_image_list_compare_func);
else
rstto_util_dialog_error (ERROR_LOAD_DIR_NO_VALID_FILE, NULL);
g_object_unref (file_enum);
}
g_list_free_full (info_list, g_object_unref);
return FALSE;
}
static void
rstto_image_list_set_directory_finish (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
RsttoImageList *image_list = user_data;
GFileEnumerator *file_enum = G_FILE_ENUMERATOR (source_object);
GList *info_list;
GError *error = NULL;
if (rstto_main_window_get_app_exited ())
{
g_object_unref (file_enum);
return;
}
info_list = g_file_enumerator_next_files_finish (file_enum, res, &error);
if (info_list == NULL)
{
/* we're done, inform the others */
image_list->priv->is_busy = FALSE;
if (!g_queue_is_empty (image_list->priv->images))
{
rstto_image_list_set_compare_func (image_list,
image_list->priv->cb_rstto_image_list_compare_func);
if (error != NULL)
rstto_util_dialog_error (ERROR_LOAD_DIR_PARTIAL, error);
}
else
rstto_util_dialog_error (ERROR_LOAD_DIR_NO_VALID_FILE, error);
g_object_unref (file_enum);
if (error != NULL)
g_error_free (error);
return;
}
/* try to prioritize image display over directory loading */
rstto_object_set_data (file_enum, "info-list", info_list);
g_idle_add (rstto_image_list_set_directory_finish_idle, file_enum);
}
static gboolean
rstto_image_list_set_directory_idle (gpointer data)
{
g_file_enumerator_next_files_async (data, FILE_BLOCK_SIZE, G_PRIORITY_DEFAULT,
NULL, rstto_image_list_set_directory_finish,
rstto_object_get_data (data, "image-list"));
return FALSE;
}
static void
rstto_image_list_set_directory_enumerate_finish (GObject *dir,
GAsyncResult *res,
gpointer user_data)
{
RsttoImageList *image_list = user_data;
GFileEnumerator *file_enum;
GError *error = NULL;
/* this is transfer full but this ref will be released in
* rstto_image_list_set_directory_finish() when everything is done */
file_enum = g_file_enumerate_children_finish (G_FILE (dir), res, &error);
if (file_enum == NULL)
{
image_list->priv->is_busy = FALSE;
rstto_util_dialog_error (ERROR_LOAD_DIR_FAILED, error);
g_error_free (error);
return;
}
rstto_object_set_data (file_enum, "loaded-file", rstto_object_get_data (dir, "loaded-file"));
rstto_object_set_data (file_enum, "image-list", image_list);
g_idle_add (rstto_image_list_set_directory_idle, rstto_util_source_autoremove (file_enum));
}
gboolean
rstto_image_list_set_directory (RsttoImageList *image_list,
GFile *dir,
RsttoFile *file,
GError **error)
{
rstto_image_list_remove_all (image_list);
rstto_image_list_monitor_dir (image_list, dir);
/* allow all images to be removed by providing NULL to dir */
if (dir == NULL)
return TRUE;
if (file != NULL && !rstto_image_list_add_file (image_list, file, error))
return FALSE;
/*
* Using async methods both to get the dir enum and the file info is needed in general,
* as well as specifying "standard::name" in order to be able to use
* g_file_enumerator_get_child() afterwards.
* See https://gitlab.gnome.org/GNOME/glib/-/issues/2507
*/
image_list->priv->is_busy = TRUE;
rstto_object_set_data (dir, "loaded-file", file);
g_file_enumerate_children_async (dir, "standard::name,standard::fast-content-type",
G_FILE_QUERY_INFO_NONE, G_PRIORITY_DEFAULT, NULL,
rstto_image_list_set_directory_enumerate_finish, image_list);
return TRUE;
}
static void
rstto_image_list_monitor_dir (RsttoImageList *image_list,
GFile *dir)
{
GFileMonitor *monitor = NULL;
if (NULL != image_list->priv->dir_monitor)
{
g_object_unref (image_list->priv->dir_monitor);
image_list->priv->dir_monitor = NULL;
}
/* Allow a monitor to be removed by providing NULL to dir */
if (NULL != dir)
{
monitor = g_file_monitor_directory (dir, G_FILE_MONITOR_NONE, NULL, NULL);
if (monitor != NULL)
{
g_signal_connect (monitor, "changed",
G_CALLBACK (cb_file_monitor_changed), image_list);
}
}
if (image_list->priv->image_monitors)
{
g_list_free_full (image_list->priv->image_monitors, g_object_unref);
image_list->priv->image_monitors = NULL;
}
image_list->priv->dir_monitor = monitor;
}
static void
cb_file_monitor_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
RsttoImageList *image_list = user_data;
RsttoFile *r_file;
GList *list;
static RsttoFile *s_r_file = NULL;
/* see if the file is already open */
for (list = image_list->priv->images->head; list != NULL; list = list->next)
if (g_file_equal (file, rstto_file_get_file (list->data)))
{
r_file = g_object_ref (list->data);
break;
}
if (list == NULL)
r_file = rstto_file_new (file);
switch (event_type)
{
case G_FILE_MONITOR_EVENT_DELETED:
case G_FILE_MONITOR_EVENT_MOVED_OUT:
rstto_image_list_remove_file (image_list, r_file);
if (image_list->priv->dir_monitor == NULL)
{
image_list->priv->image_monitors = g_list_remove (image_list->priv->image_monitors, monitor);
g_object_unref (monitor);
monitor = NULL;
}
break;
case G_FILE_MONITOR_EVENT_CREATED:
/* should never happen here but just in case, to prevent any memory leak */
if (s_r_file != NULL)
g_object_unref (s_r_file);
/* wait for DONE_HINT to add the image, so that we can get its mime type */
s_r_file = g_object_ref (r_file);
break;
case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
/* a file was created */
if (s_r_file != NULL)
{
rstto_image_list_add_file (image_list, s_r_file, NULL);
g_object_unref (s_r_file);
s_r_file = NULL;
}
/* a file has changed */
else
{
rstto_file_changed (r_file);
if (image_list->priv->cb_rstto_image_list_compare_func == cb_rstto_image_list_image_type_compare_func
|| image_list->priv->cb_rstto_image_list_compare_func == cb_rstto_image_list_exif_date_compare_func)
{
rstto_image_list_set_compare_func (image_list, image_list->priv->cb_rstto_image_list_compare_func);
}
}
break;
case G_FILE_MONITOR_EVENT_CHANGED:
/* wait for DONE_HINT to update the image, so that we can get its mime type */
break;
case G_FILE_MONITOR_EVENT_RENAMED:
cb_file_monitor_changed (monitor, file, other_file,
G_FILE_MONITOR_EVENT_DELETED, user_data);
g_object_unref (r_file);
r_file = rstto_file_new (other_file);
rstto_image_list_add_file (image_list, r_file, NULL);
break;
default:
break;
}
if (NULL != r_file)
{
g_object_unref (r_file);
}
}
static void
rstto_image_list_iter_init (RsttoImageListIter *iter)
{
iter->priv = rstto_image_list_iter_get_instance_private (iter);
}
static void
rstto_image_list_iter_class_init (RsttoImageListIterClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = rstto_image_list_iter_finalize;
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_PREPARE_CHANGE] =
g_signal_new ("prepare-change",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
0, NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_CHANGED] =
g_signal_new ("changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
0, NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
rstto_image_list_iter_finalize (GObject *object)
{
RsttoImageListIter *iter = RSTTO_IMAGE_LIST_ITER (object);
if (iter->priv->r_file)
{
iter->priv->r_file = NULL;
iter->priv->link = NULL;
iter->priv->index = -1;
}
if (iter->priv->image_list)
{
iter->priv->image_list->priv->iterators = g_slist_remove (iter->priv->image_list->priv->iterators, iter);
iter->priv->image_list = NULL;
}
G_OBJECT_CLASS (rstto_image_list_iter_parent_class)->finalize (object);
}
static RsttoImageListIter *
rstto_image_list_iter_new (RsttoImageList *nav,
RsttoFile *r_file)
{
RsttoImageListIter *iter;
iter = g_object_new (RSTTO_TYPE_IMAGE_LIST_ITER, NULL);
iter->priv->image_list = nav;
iter->priv->r_file = r_file;
iter->priv->index = g_queue_index (nav->priv->images, r_file);
iter->priv->link = g_queue_peek_nth_link (nav->priv->images, iter->priv->index);
return iter;
}
gboolean
rstto_image_list_iter_find_file (RsttoImageListIter *iter,
RsttoFile *r_file)
{
RsttoImageList *image_list = iter->priv->image_list;
gint index;
index = g_queue_index (image_list->priv->images, r_file);
if (index == -1)
return FALSE;
g_signal_emit (iter,
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_PREPARE_CHANGE],
0, NULL);
iter->priv->r_file = r_file;
iter->priv->index = index;
iter->priv->link = g_queue_peek_nth_link (image_list->priv->images, iter->priv->index);
g_signal_emit (iter,
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_CHANGED],
0, NULL);
return TRUE;
}
gint
rstto_image_list_iter_get_position (RsttoImageListIter *iter)
{
return iter->priv->index;
}
RsttoFile *
rstto_image_list_iter_get_file (RsttoImageListIter *iter)
{
return iter->priv->r_file;
}
static void
iter_set_position (RsttoImageListIter *iter,
gint pos,
gboolean sticky)
{
if (iter->priv->index == pos)
return;
g_signal_emit (iter,
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_PREPARE_CHANGE],
0, NULL);
iter->priv->sticky = sticky;
iter->priv->link = g_queue_peek_nth_link (iter->priv->image_list->priv->images, pos);
if (iter->priv->link == NULL)
{
iter->priv->r_file = NULL;
iter->priv->index = -1;
}
else
{
iter->priv->r_file = iter->priv->link->data;
iter->priv->index = pos;
}
g_signal_emit (iter,
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_CHANGED],
0, NULL);
}
void
rstto_image_list_iter_set_position (RsttoImageListIter *iter,
gint pos)
{
iter_set_position (iter, pos, TRUE);
}
static gboolean
iter_next (RsttoImageListIter *iter,
gboolean sticky)
{
RsttoImageList *image_list = iter->priv->image_list;
gboolean ret_val = FALSE;
if (iter->priv->link == NULL)
return FALSE;
g_signal_emit (iter,
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_PREPARE_CHANGE],
0, NULL);
if (iter->priv->link->next != NULL || image_list->priv->wrap_images)
{
if (iter->priv->link->next != NULL)
{
ret_val = TRUE;
iter->priv->link = iter->priv->link->next;
iter->priv->index++;
}
else
{
ret_val = image_list->priv->images->length > 1;
iter->priv->link = image_list->priv->images->head;
iter->priv->index = 0;
}
iter->priv->r_file = iter->priv->link->data;
iter->priv->sticky = sticky;
}
if (ret_val == TRUE)
g_signal_emit (iter,
rstto_image_list_iter_signals[RSTTO_IMAGE_LIST_ITER_SIGNAL_CHANGED],
0, NULL);
return ret_val;
}
gboolean
rstto_image_list_iter_next (RsttoImageListIter *iter)
{
return iter_next (iter, TRUE);
}
gboolean
rstto_image_list_iter_has_next (RsttoImageListIter *iter)
{
RsttoImageList *image_list = iter->priv->image_list;
return iter->priv->link != NULL
&& (image_list->priv->wrap_images || iter->priv->link != image_list->priv->images->tail);
}
static gboolean
iter_previous (RsttoImageListIter *iter,
gboolean sticky)
{
RsttoImageList *image_list = iter->priv->image_list;