[gnome-photos/wip/rishi/item-manager: 1/10] item-manager: Add photos_item_manager_(un)hide_item

[Debarshi Ray <debarshir src gnome org>]

commit d961062df7588ccd16fb733a65416a1315dc3b73
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Aug 15 11:44:05 2016 +0200

    item-manager: Add photos_item_manager_(un)hide_item
    
    Right now PhotosItemManager doesn't have any idea about items that were
    removed from the UI as a precursor to an actual deletion that will
    only happen if the user doesn't undo it. This means that it cannot
    properly handle TrackerChangeMonitor::changes-pending for such items.
    Secondly, when we change PhotosItemManager to have multiple child
    managers, we will need to track the modes for each hidden item so that
    we can restore them to their appropriate child managers. Making
    ItemManager aware of hidden items will help with that.

 src/photos-item-manager.c |   43 +++++++++++++++++++++++++++++++++++++++++++
 src/photos-item-manager.h |    4 ++++
 2 files changed, 47 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-item-manager.c b/src/photos-item-manager.c
index 0bc80f9..de42015 100644
--- a/src/photos-item-manager.c
+++ b/src/photos-item-manager.c
@@ -48,6 +48,7 @@ struct _PhotosItemManager
   PhotosBaseManager parent_instance;
   GCancellable *loader_cancellable;
   GHashTable *collections;
+  GHashTable *hidden_items;
   GIOExtensionPoint *extension_point;
   GQueue *collection_path;
   GQueue *history;
@@ -431,6 +432,7 @@ photos_item_manager_dispose (GObject *object)
     }
 
   g_clear_pointer (&self->collections, (GDestroyNotify) g_hash_table_unref);
+  g_clear_pointer (&self->hidden_items, (GDestroyNotify) g_hash_table_unref);
   g_clear_object (&self->loader_cancellable);
   g_clear_object (&self->active_collection);
   g_clear_object (&self->monitor);
@@ -458,6 +460,7 @@ photos_item_manager_init (PhotosItemManager *self)
   EGG_COUNTER_INC (instances);
 
   self->collections = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_object_unref);
+  self->hidden_items = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_object_unref);
   self->extension_point = g_io_extension_point_lookup (PHOTOS_BASE_ITEM_EXTENSION_POINT_NAME);
   self->collection_path = g_queue_new ();
   self->history = g_queue_new ();
@@ -684,6 +687,46 @@ photos_item_manager_get_load_state (PhotosItemManager *self)
 }
 
 
+void
+photos_item_manager_hide_item (PhotosItemManager *self, PhotosBaseItem *item)
+{
+  PhotosBaseItem *old_hidden_item;
+  const gchar *id;
+
+  g_return_if_fail (PHOTOS_IS_ITEM_MANAGER (self));
+  g_return_if_fail (PHOTOS_IS_BASE_ITEM (item));
+
+  id = photos_filterable_get_id (PHOTOS_FILTERABLE (item));
+  g_return_if_fail (id != NULL && id[0] != '\0');
+
+  old_hidden_item = PHOTOS_BASE_ITEM (g_hash_table_lookup (self->hidden_items, id));
+  g_return_if_fail (old_hidden_item == NULL);
+
+  g_hash_table_insert (self->hidden_items, g_strdup (id), g_object_ref (item));
+  photos_base_manager_remove_object_by_id (PHOTOS_BASE_MANAGER (self), id);
+}
+
+
+void
+photos_item_manager_unhide_item (PhotosItemManager *self, PhotosBaseItem *item)
+{
+  PhotosBaseItem *hidden_item;
+  const gchar *id;
+
+  g_return_if_fail (PHOTOS_IS_ITEM_MANAGER (self));
+  g_return_if_fail (PHOTOS_IS_BASE_ITEM (item));
+
+  id = photos_filterable_get_id (PHOTOS_FILTERABLE (item));
+  g_return_if_fail (id != NULL && id[0] != '\0');
+
+  hidden_item = PHOTOS_BASE_ITEM (g_hash_table_lookup (self->hidden_items, id));
+  g_return_if_fail (hidden_item == item);
+
+  photos_base_manager_add_object (PHOTOS_BASE_MANAGER (self), G_OBJECT (item));
+  g_hash_table_remove (self->hidden_items, id);
+}
+
+
 gboolean
 photos_mode_controller_get_can_fullscreen (PhotosModeController *self)
 {
diff --git a/src/photos-item-manager.h b/src/photos-item-manager.h
index 0219a6a..726cc41 100644
--- a/src/photos-item-manager.h
+++ b/src/photos-item-manager.h
@@ -97,6 +97,10 @@ GHashTable               *photos_item_manager_get_collections       (PhotosItemM
 
 PhotosLoadState           photos_item_manager_get_load_state        (PhotosItemManager *self);
 
+void                      photos_item_manager_hide_item             (PhotosItemManager *self, PhotosBaseItem 
*item);
+
+void                      photos_item_manager_unhide_item           (PhotosItemManager *self, PhotosBaseItem 
*item);
+
 gboolean                  photos_mode_controller_get_can_fullscreen (PhotosModeController *self);
 
 gboolean                  photos_mode_controller_get_fullscreen     (PhotosModeController *self);