[gthumb] added ability to add a tag to the selected files with the context menu



commit 70b2cec293e2432c478e51d711b469aed19b8f44
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Wed Jun 30 22:34:19 2010 +0200

    added ability to add a tag to the selected files with the context menu

 extensions/edit_metadata/Makefile.am              |    4 +
 extensions/edit_metadata/actions.c                |   62 ++++
 extensions/edit_metadata/actions.h                |    1 +
 extensions/edit_metadata/callbacks.c              |  152 +++++++++-
 extensions/edit_metadata/callbacks.h              |    8 +-
 extensions/edit_metadata/data/ui/Makefile.am      |    2 +-
 extensions/edit_metadata/data/ui/tag-chooser.ui   |  131 ++++++++
 extensions/edit_metadata/gth-tag-chooser-dialog.c |  339 +++++++++++++++++++++
 extensions/edit_metadata/gth-tag-chooser-dialog.h |   59 ++++
 extensions/edit_metadata/gth-tag-task.c           |  206 +++++++++++++
 extensions/edit_metadata/gth-tag-task.h           |   57 ++++
 extensions/edit_metadata/main.c                   |    3 +-
 gthumb/gth-main.c                                 |    3 +-
 gthumb/gth-string-list.c                          |   12 +
 gthumb/gth-string-list.h                          |    2 +
 15 files changed, 1032 insertions(+), 9 deletions(-)
---
diff --git a/extensions/edit_metadata/Makefile.am b/extensions/edit_metadata/Makefile.am
index a77c10c..3e41b4c 100644
--- a/extensions/edit_metadata/Makefile.am
+++ b/extensions/edit_metadata/Makefile.am
@@ -14,6 +14,10 @@ libedit_metadata_la_SOURCES = 		\
 	gth-edit-comment-page.h		\
 	gth-edit-metadata-dialog.c	\
 	gth-edit-metadata-dialog.h	\
+	gth-tag-chooser-dialog.c	\
+	gth-tag-chooser-dialog.h	\
+	gth-tag-task.c			\
+	gth-tag-task.h			\
 	main.c
 
 libedit_metadata_la_CFLAGS = $(GTHUMB_CFLAGS) -I$(top_srcdir) -I$(top_builddir)/gthumb 
diff --git a/extensions/edit_metadata/actions.c b/extensions/edit_metadata/actions.c
index 0219cfd..333df2b 100644
--- a/extensions/edit_metadata/actions.c
+++ b/extensions/edit_metadata/actions.c
@@ -24,6 +24,8 @@
 #include <config.h>
 #include <gthumb.h>
 #include "dlg-edit-metadata.h"
+#include "gth-tag-chooser-dialog.h"
+#include "gth-tag-task.h"
 
 
 void
@@ -43,3 +45,63 @@ gth_browser_activate_action_edit_metadata (GtkAction  *action,
 	_g_object_list_unref (file_data_list);
 	_gtk_tree_path_list_free (items);
 }
+
+
+static void
+tag_chooser_dialog_response_cb (GtkDialog *dialog,
+				int        response_id,
+				gpointer   user_data)
+{
+	GthBrowser *browser = user_data;
+
+	switch (response_id) {
+	case GTK_RESPONSE_HELP:
+		show_help_dialog (GTK_WINDOW (browser), "assign-tags");
+		break;
+
+	case GTK_RESPONSE_OK:
+		{
+			GList    *items;
+			GList    *file_data_list;
+			GList    *file_list;
+			char    **tags;
+			GthTask  *task;
+
+			items = gth_file_selection_get_selected (GTH_FILE_SELECTION (gth_browser_get_file_list_view (browser)));
+			file_data_list = gth_file_list_get_files (GTH_FILE_LIST (gth_browser_get_file_list (browser)), items);
+			file_list = gth_file_data_list_to_file_list (file_data_list);
+			tags = gth_tag_chooser_dialog_get_tags (GTH_TAG_CHOOSER_DIALOG (dialog));
+			task = gth_tag_task_new (file_list, tags);
+			gth_browser_exec_task (browser, task, FALSE);
+			gtk_widget_destroy (GTK_WIDGET (dialog));
+
+			g_object_unref (task);
+			g_strfreev (tags);
+			_g_object_list_unref (file_list);
+			_g_object_list_unref (file_data_list);
+			_gtk_tree_path_list_free (items);
+		}
+		break;
+
+	case GTK_RESPONSE_DELETE_EVENT:
+	case GTK_RESPONSE_CANCEL:
+		gtk_widget_destroy (GTK_WIDGET (dialog));
+		break;
+	}
+}
+
+
+void
+gth_browser_activate_action_edit_tag_files (GtkAction  *action,
+					    GthBrowser *browser)
+{
+	GtkWidget *dialog;
+
+	dialog = gth_tag_chooser_dialog_new ();
+	g_signal_connect (dialog,
+			  "response",
+			  G_CALLBACK (tag_chooser_dialog_response_cb),
+			  browser);
+	gtk_window_set_transient_for (GTK_WINDOW (dialog), GTK_WINDOW (browser));
+	gtk_window_present (GTK_WINDOW (dialog));
+}
diff --git a/extensions/edit_metadata/actions.h b/extensions/edit_metadata/actions.h
index 96777e2..270bd61 100644
--- a/extensions/edit_metadata/actions.h
+++ b/extensions/edit_metadata/actions.h
@@ -28,5 +28,6 @@
 #define DEFINE_ACTION(x) void x (GtkAction *action, gpointer data);
 
 DEFINE_ACTION(gth_browser_activate_action_edit_metadata)
+DEFINE_ACTION(gth_browser_activate_action_edit_tag_files)
 
 #endif /* ACTIONS_H */
diff --git a/extensions/edit_metadata/callbacks.c b/extensions/edit_metadata/callbacks.c
index 8cd5b80..9072185 100644
--- a/extensions/edit_metadata/callbacks.c
+++ b/extensions/edit_metadata/callbacks.c
@@ -26,6 +26,7 @@
 #include <glib-object.h>
 #include <gthumb.h>
 #include "actions.h"
+#include "gth-tag-task.h"
 
 
 #define BROWSER_DATA_KEY "edit-metadata-data"
@@ -52,11 +53,19 @@ static const char *fixed_ui_info =
 "  </toolbar>"
 "  <popup name='FileListPopup'>"
 "    <placeholder name='File_LastActions'>"
+"      <menu action='Edit_QuickTag'>"
+"        <separator name='TagListSeparator'/>"
+"        <menuitem action='Edit_QuickTagOther'/>"
+"      </menu>"
 "      <menuitem action='Edit_Metadata'/>"
 "    </placeholder>"
 "  </popup>"
 "  <popup name='FilePopup'>"
 "    <placeholder name='File_LastActions'>"
+"      <menu action='Edit_QuickTag'>"
+"        <separator name='TagListSeparator'/>"
+"        <menuitem action='Edit_QuickTagOther'/>"
+"      </menu>"
 "      <menuitem action='Edit_Metadata'/>"
 "    </placeholder>"
 "  </popup>"
@@ -86,10 +95,17 @@ static const char *viewer_ui_info =
 
 
 static GtkActionEntry edit_metadata_action_entries[] = {
+	{ "Edit_QuickTag", "tag", N_("T_ags") },
+
 	{ "Edit_Metadata", GTK_STOCK_EDIT,
 	  N_("Comment"), "<control>M",
 	  N_("Edit the comment an other information of the selected files"),
-	  G_CALLBACK (gth_browser_activate_action_edit_metadata) }
+	  G_CALLBACK (gth_browser_activate_action_edit_metadata) },
+
+        { "Edit_QuickTagOther", NULL,
+	  N_("Other..."), NULL,
+	  N_("Choose another tag"),
+	  G_CALLBACK (gth_browser_activate_action_edit_tag_files) }
 };
 
 
@@ -98,16 +114,30 @@ typedef struct {
 	GtkActionGroup *actions;
 	guint           browser_ui_merge_id;
 	guint           viewer_ui_merge_id;
+	gboolean        tag_menu_loaded;
+	guint           monitor_events;
 } BrowserData;
 
 
 static void
 browser_data_free (BrowserData *data)
 {
+	if (data->monitor_events != 0) {
+		g_signal_handler_disconnect (gth_main_get_default_monitor (), data->monitor_events);
+		data->monitor_events = 0;
+	}
 	g_free (data);
 }
 
 
+static void
+monitor_tags_changed_cb (GthMonitor  *monitor,
+			 BrowserData *data)
+{
+	data->tag_menu_loaded = FALSE;
+}
+
+
 void
 edit_metadata__gth_browser_construct_cb (GthBrowser *browser)
 {
@@ -134,6 +164,11 @@ edit_metadata__gth_browser_construct_cb (GthBrowser *browser)
 
 	gtk_tool_item_set_is_important (GTK_TOOL_ITEM (gtk_ui_manager_get_widget (gth_browser_get_ui_manager (browser), "/Fullscreen_ToolBar/Edit_Actions/Edit_Metadata")), TRUE);
 
+	data->monitor_events = g_signal_connect (gth_main_get_default_monitor (),
+						 "tags-changed",
+						 G_CALLBACK (monitor_tags_changed_cb),
+						 data);
+
 	g_object_set_data_full (G_OBJECT (browser), BROWSER_DATA_KEY, data, (GDestroyNotify) browser_data_free);
 }
 
@@ -176,7 +211,6 @@ edit_metadata__gth_browser_set_current_page_cb (GthBrowser *browser)
 			g_clear_error (&error);
 		}
 		gtk_tool_item_set_is_important (GTK_TOOL_ITEM (gtk_ui_manager_get_widget (gth_browser_get_ui_manager (browser), "/ViewerToolBar/Edit_Actions/Edit_Metadata")), TRUE);
-
 		break;
 
 	default:
@@ -202,3 +236,117 @@ edit_metadata__gth_browser_update_sensitivity_cb (GthBrowser *browser)
 	sensitive = (n_selected > 0);
 	g_object_set (action, "sensitive", sensitive, NULL);
 }
+
+
+static void
+tag_item_activate_cb (GtkMenuItem *menuitem,
+		      gpointer     user_data)
+{
+	GthBrowser  *browser = user_data;
+	GList       *items;
+	GList       *file_data_list;
+	GList       *file_list;
+	char        *tag;
+	char       **tags;
+	GthTask     *task;
+
+	if (gtk_menu_item_get_submenu (menuitem) != NULL)
+		return;
+
+	items = gth_file_selection_get_selected (GTH_FILE_SELECTION (gth_browser_get_file_list_view (browser)));
+	file_data_list = gth_file_list_get_files (GTH_FILE_LIST (gth_browser_get_file_list (browser)), items);
+	file_list = gth_file_data_list_to_file_list (file_data_list);
+
+	tag = g_object_get_data (G_OBJECT (menuitem), "tag");
+	tags = g_new0 (char *, 2);
+	tags[0] = g_strdup (tag);
+	tags[1] = NULL;
+
+	task = gth_tag_task_new (file_list, tags);
+	gth_browser_exec_task (browser, task, FALSE);
+
+	g_object_unref (task);
+	g_strfreev (tags);
+	_g_object_list_unref (file_list);
+	_g_object_list_unref (file_data_list);
+	_gtk_tree_path_list_free (items);
+}
+
+
+static void
+insert_tag_menu_item (BrowserData *data,
+		      GtkWidget   *menu,
+		      const char  *tag,
+		      int          pos)
+{
+	GtkWidget *item;
+	GtkWidget *image;
+
+	item = gtk_image_menu_item_new_with_label (tag);
+	/*gtk_image_menu_item_set_always_show_image (GTK_IMAGE_MENU_ITEM (item), TRUE);*/
+
+	image = gtk_image_new_from_icon_name ("tag", GTK_ICON_SIZE_MENU);
+	gtk_widget_show (image);
+	gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (item), image);
+	gtk_widget_show (item);
+	gtk_menu_shell_insert (GTK_MENU_SHELL (menu), item, pos);
+	g_object_set_data_full (G_OBJECT (item), "tag", g_strdup (tag), g_free);
+	g_signal_connect (item, "activate", G_CALLBACK (tag_item_activate_cb), data->browser);
+}
+
+
+static void
+update_tag_menu (BrowserData *data)
+{
+	GtkWidget   *list_menu;
+	GtkWidget   *file_menu;
+	GtkWidget   *separator;
+	char       **tags;
+	int          i;
+
+	list_menu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (gtk_ui_manager_get_widget (gth_browser_get_ui_manager (data->browser), "/FileListPopup/File_LastActions/Edit_QuickTag")));
+	separator = gtk_ui_manager_get_widget (gth_browser_get_ui_manager (data->browser), "/FileListPopup/File_LastActions/Edit_QuickTag/TagListSeparator");
+	_gtk_container_remove_children (GTK_CONTAINER (list_menu), NULL, separator);
+
+	file_menu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (gtk_ui_manager_get_widget (gth_browser_get_ui_manager (data->browser), "/FilePopup/File_LastActions/Edit_QuickTag")));
+	separator = gtk_ui_manager_get_widget (gth_browser_get_ui_manager (data->browser), "/FilePopup/File_LastActions/Edit_QuickTag/TagListSeparator");
+	_gtk_container_remove_children (GTK_CONTAINER (file_menu), NULL, separator);
+
+	tags = g_strdupv (gth_tags_file_get_tags (gth_main_get_default_tag_file ()));
+	for (i = 0; tags[i] != NULL; i++) {
+		insert_tag_menu_item (data, list_menu, tags[i], i);
+		insert_tag_menu_item (data, file_menu, tags[i], i);
+	}
+
+	g_strfreev (tags);
+}
+
+
+void
+edit_metadata__gth_browser_file_list_popup_before_cb (GthBrowser *browser)
+{
+	BrowserData *data;
+
+	data = g_object_get_data (G_OBJECT (browser), BROWSER_DATA_KEY);
+	g_return_if_fail (data != NULL);
+
+	if (! data->tag_menu_loaded) {
+		data->tag_menu_loaded = TRUE;
+		update_tag_menu (data);
+	}
+}
+
+
+void
+edit_metadata__gth_browser_file_popup_before_cb (GthBrowser *browser)
+{
+	BrowserData *data;
+
+	data = g_object_get_data (G_OBJECT (browser), BROWSER_DATA_KEY);
+	g_return_if_fail (data != NULL);
+
+	if (! data->tag_menu_loaded) {
+		data->tag_menu_loaded = TRUE;
+		update_tag_menu (data);
+	}
+}
diff --git a/extensions/edit_metadata/callbacks.h b/extensions/edit_metadata/callbacks.h
index 2a6e334..e387287 100644
--- a/extensions/edit_metadata/callbacks.h
+++ b/extensions/edit_metadata/callbacks.h
@@ -25,8 +25,10 @@
 
 #include <gthumb.h>
 
-void edit_metadata__gth_browser_construct_cb          (GthBrowser *browser);
-void edit_metadata__gth_browser_set_current_page_cb   (GthBrowser *browser);
-void edit_metadata__gth_browser_update_sensitivity_cb (GthBrowser *browser);
+void edit_metadata__gth_browser_construct_cb              (GthBrowser *browser);
+void edit_metadata__gth_browser_set_current_page_cb       (GthBrowser *browser);
+void edit_metadata__gth_browser_update_sensitivity_cb     (GthBrowser *browser);
+void edit_metadata__gth_browser_file_list_popup_before_cb (GthBrowser *browser);
+void edit_metadata__gth_browser_file_popup_before_cb      (GthBrowser *browser);
 
 #endif /* CALLBACKS_H */
diff --git a/extensions/edit_metadata/data/ui/Makefile.am b/extensions/edit_metadata/data/ui/Makefile.am
index 7f637c1..57b099a 100644
--- a/extensions/edit_metadata/data/ui/Makefile.am
+++ b/extensions/edit_metadata/data/ui/Makefile.am
@@ -1,5 +1,5 @@
 uidir = $(pkgdatadir)/ui
-ui_DATA = edit-comment-page.ui
+ui_DATA = edit-comment-page.ui tag-chooser.ui
 EXTRA_DIST = $(ui_DATA)
 
 -include $(top_srcdir)/git.mk
diff --git a/extensions/edit_metadata/data/ui/tag-chooser.ui b/extensions/edit_metadata/data/ui/tag-chooser.ui
new file mode 100644
index 0000000..8cb6897
--- /dev/null
+++ b/extensions/edit_metadata/data/ui/tag-chooser.ui
@@ -0,0 +1,131 @@
+<?xml version="1.0"?>
+<interface>
+  <requires lib="gtk+" version="2.14"/>
+  <!-- interface-naming-policy project-wide -->
+  <object class="GtkListStore" id="tags_liststore">
+    <columns>
+      <!-- column-name name -->
+      <column type="gchararray"/>
+      <!-- column-name selected -->
+      <column type="gboolean"/>
+    </columns>
+  </object>
+  <object class="GtkVBox" id="content">
+    <property name="visible">True</property>
+    <property name="orientation">vertical</property>
+    <property name="spacing">6</property>
+    <child>
+      <object class="GtkLabel" id="tag_label">
+        <property name="visible">True</property>
+        <property name="xalign">0</property>
+        <property name="label" translatable="yes">T_ags:</property>
+        <property name="use_underline">True</property>
+        <property name="mnemonic_widget">tags_treeview</property>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="position">0</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkHBox" id="hbox3">
+        <property name="visible">True</property>
+        <property name="spacing">12</property>
+        <child>
+          <object class="GtkScrolledWindow" id="tags_scrolledwindow">
+            <property name="width_request">250</property>
+            <property name="height_request">300</property>
+            <property name="visible">True</property>
+            <property name="can_focus">True</property>
+            <property name="hscrollbar_policy">automatic</property>
+            <property name="vscrollbar_policy">automatic</property>
+            <property name="shadow_type">etched-in</property>
+            <child>
+              <object class="GtkTreeView" id="tags_treeview">
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <property name="model">tags_liststore</property>
+                <property name="headers_visible">False</property>
+                <child>
+                  <object class="GtkTreeViewColumn" id="treeviewcolumn1">
+                    <child>
+                      <object class="GtkCellRendererToggle" id="selected_cellrenderertoggle"/>
+                      <attributes>
+                        <attribute name="active">1</attribute>
+                      </attributes>
+                    </child>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkTreeViewColumn" id="treeviewcolumn2">
+                    <property name="title">column</property>
+                    <property name="sort_column_id">1</property>
+                    <child>
+                      <object class="GtkCellRendererPixbuf" id="cellrendererpixbuf2">
+                        <property name="icon_name">tag</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkCellRendererText" id="name_cellrenderertext">
+                        <property name="editable">True</property>
+                      </object>
+                      <attributes>
+                        <attribute name="text">0</attribute>
+                      </attributes>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkVButtonBox" id="vbuttonbox3">
+            <property name="visible">True</property>
+            <property name="orientation">vertical</property>
+            <property name="spacing">6</property>
+            <property name="layout_style">start</property>
+            <child>
+              <object class="GtkButton" id="new_button">
+                <property name="label">gtk-new</property>
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <property name="receives_default">True</property>
+                <property name="use_stock">True</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">False</property>
+                <property name="position">0</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkButton" id="delete_button">
+                <property name="label">gtk-remove</property>
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <property name="receives_default">True</property>
+                <property name="use_stock">True</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">False</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+      <packing>
+        <property name="position">1</property>
+      </packing>
+    </child>
+  </object>
+</interface>
diff --git a/extensions/edit_metadata/gth-tag-chooser-dialog.c b/extensions/edit_metadata/gth-tag-chooser-dialog.c
new file mode 100644
index 0000000..d1f51dc
--- /dev/null
+++ b/extensions/edit_metadata/gth-tag-chooser-dialog.c
@@ -0,0 +1,339 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/*
+ *  GThumb
+ *
+ *  Copyright (C) 2010 Free Software Foundation, Inc.
+ *
+ *  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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+#include <glib/gi18n.h>
+#include "gth-tag-chooser-dialog.h"
+
+#define GTH_TAG_CHOOSER_DIALOG_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTH_TYPE_TAG_CHOOSER_DIALOG, GthTagChooserDialogPrivate))
+#define GET_WIDGET(name) _gtk_builder_get_widget (self->priv->builder, (name))
+
+
+enum {
+	NAME_COLUMN = 0,
+	SELECTED_COLUMN
+};
+
+
+static gpointer parent_class = NULL;
+
+
+struct _GthTagChooserDialogPrivate {
+	GtkBuilder *builder;
+};
+
+
+static void
+gth_tag_chooser_dialog_finalize (GObject *object)
+{
+	GthTagChooserDialog *self;
+
+	self = GTH_TAG_CHOOSER_DIALOG (object);
+
+	_g_object_unref (self->priv->builder);
+
+	G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+
+static void
+gth_tag_chooser_dialog_class_init (GthTagChooserDialogClass *klass)
+{
+	GObjectClass *object_class;
+
+	parent_class = g_type_class_peek_parent (klass);
+	g_type_class_add_private (klass, sizeof (GthTagChooserDialogPrivate));
+
+	object_class = (GObjectClass*) klass;
+	object_class->finalize = gth_tag_chooser_dialog_finalize;
+}
+
+
+static void
+new_button_clicked_cb (GtkButton *button,
+		       gpointer   user_data)
+{
+	GthTagChooserDialog *self = user_data;
+	GtkTreeIter          iter;
+	GtkTreePath         *path;
+
+	gtk_list_store_append (GTK_LIST_STORE (GET_WIDGET ("tags_liststore")), &iter);
+	gtk_list_store_set (GTK_LIST_STORE (GET_WIDGET ("tags_liststore")), &iter,
+			    SELECTED_COLUMN, TRUE,
+			    NAME_COLUMN, _("New tag"),
+			    -1);
+
+	path = gtk_tree_model_get_path (GTK_TREE_MODEL (GET_WIDGET ("tags_liststore")), &iter);
+	gtk_tree_view_set_cursor_on_cell (GTK_TREE_VIEW (GET_WIDGET ("tags_treeview")),
+					  path,
+					  GTK_TREE_VIEW_COLUMN (GET_WIDGET ("treeviewcolumn2")),
+					  GTK_CELL_RENDERER (GET_WIDGET ("name_cellrenderertext")),
+					  TRUE);
+
+	gtk_tree_path_free (path);
+}
+
+
+static void
+delete_button_clicked_cb (GtkButton *button,
+			  gpointer   user_data)
+{
+	GthTagChooserDialog *self = user_data;
+	GtkTreeIter          iter;
+	char                *selected_tag;
+	GthTagsFile         *tags;
+
+	if (! gtk_tree_selection_get_selected (gtk_tree_view_get_selection (GTK_TREE_VIEW (GET_WIDGET ("tags_treeview"))), NULL, &iter))
+		return;
+
+	gtk_tree_model_get (GTK_TREE_MODEL (GET_WIDGET ("tags_liststore")), &iter,
+			    NAME_COLUMN, &selected_tag,
+			    -1);
+
+	tags = gth_main_get_default_tag_file ();
+	gth_tags_file_remove (tags, selected_tag);
+	gth_main_tags_changed ();
+
+	gtk_list_store_remove (GTK_LIST_STORE (GET_WIDGET ("tags_liststore")), &iter);
+
+	g_free (selected_tag);
+}
+
+
+static void
+selected_cellrenderertoggle_toggled_cb (GtkCellRendererToggle *cell_renderer,
+					char                  *path,
+					gpointer               user_data)
+{
+	GthTagChooserDialog *self = user_data;
+	GtkTreePath         *tpath;
+	GtkTreeIter          iter;
+
+	tpath = gtk_tree_path_new_from_string (path);
+	if (tpath == NULL)
+		return;
+
+	if (gtk_tree_model_get_iter (GTK_TREE_MODEL (GET_WIDGET ("tags_liststore")), &iter, tpath)) {
+		gboolean selected;
+
+		gtk_tree_model_get (GTK_TREE_MODEL (GET_WIDGET ("tags_liststore")), &iter,
+				    SELECTED_COLUMN, &selected,
+				    -1);
+		gtk_list_store_set (GTK_LIST_STORE (GET_WIDGET ("tags_liststore")), &iter,
+				    SELECTED_COLUMN, ! selected,
+				    -1);
+	}
+
+	gtk_tree_path_free (tpath);
+}
+
+
+static void
+name_cellrenderertext_edited_cb (GtkCellRendererText *renderer,
+				 char                *path,
+				 char                *new_text,
+				 gpointer             user_data)
+{
+	GthTagChooserDialog *self = user_data;
+	GtkTreePath         *tree_path;
+	GtkTreeIter          iter;
+	char                *old_text;
+	GthTagsFile         *tags;
+
+	tree_path = gtk_tree_path_new_from_string (path);
+	if (! gtk_tree_model_get_iter (GTK_TREE_MODEL (GET_WIDGET ("tags_liststore")),
+				       &iter,
+				       tree_path))
+	{
+		gtk_tree_path_free (tree_path);
+		return;
+	}
+	gtk_tree_path_free (tree_path);
+
+	gtk_tree_model_get (GTK_TREE_MODEL (GET_WIDGET ("tags_liststore")),
+			    &iter,
+			    NAME_COLUMN, &old_text,
+			    -1);
+
+	tags = gth_main_get_default_tag_file ();
+	if (old_text != NULL)
+		gth_tags_file_remove (tags, old_text);
+	if (new_text != NULL)
+		gth_tags_file_add (tags, new_text);
+	gth_main_tags_changed ();
+
+	gtk_list_store_set (GTK_LIST_STORE (GET_WIDGET ("tags_liststore")),
+			    &iter,
+			    NAME_COLUMN, new_text,
+			    -1);
+
+	g_free (old_text);
+}
+
+
+static int
+tags_liststore_sort_func (GtkTreeModel *model,
+			  GtkTreeIter  *a,
+			  GtkTreeIter  *b,
+			  gpointer      user_data)
+{
+	char *name_a;
+	char *name_b;
+	int   result;
+
+	gtk_tree_model_get (model, a, NAME_COLUMN, &name_a, -1);
+	gtk_tree_model_get (model, b, NAME_COLUMN, &name_b, -1);
+	result = g_utf8_collate (name_a, name_b);
+
+	g_free (name_a);
+	g_free (name_b);
+
+	return result;
+}
+
+
+static void
+gth_tag_chooser_dialog_init (GthTagChooserDialog *self)
+{
+	GtkWidget  *content;
+	char      **tags;
+	int         i;
+
+	self->priv = GTH_TAG_CHOOSER_DIALOG_GET_PRIVATE (self);
+	self->priv->builder = _gtk_builder_new_from_file ("tag-chooser.ui", "edit_metadata");
+
+	gtk_window_set_title (GTK_WINDOW (self), _("Assign Tags"));
+	gtk_window_set_resizable (GTK_WINDOW (self), FALSE);
+	gtk_dialog_set_has_separator (GTK_DIALOG (self), FALSE);
+	gtk_box_set_spacing (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (self))), 5);
+	gtk_container_set_border_width (GTK_CONTAINER (self), 5);
+
+	gtk_dialog_add_button (GTK_DIALOG (self), GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL);
+	gtk_dialog_add_button (GTK_DIALOG (self), GTK_STOCK_OK, GTK_RESPONSE_OK);
+	gtk_dialog_add_button (GTK_DIALOG (self), GTK_STOCK_HELP, GTK_RESPONSE_HELP);
+
+	content = _gtk_builder_get_widget (self->priv->builder, "content");
+	gtk_container_set_border_width (GTK_CONTAINER (content), 5);
+	gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (self))), content, TRUE, TRUE, 0);
+
+	gtk_tree_sortable_set_default_sort_func (GTK_TREE_SORTABLE (GET_WIDGET ("tags_liststore")), tags_liststore_sort_func, self, NULL);
+	gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (GET_WIDGET ("tags_liststore")), GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, GTK_SORT_ASCENDING);
+
+	g_signal_connect (GET_WIDGET ("selected_cellrenderertoggle"),
+			  "toggled",
+			  G_CALLBACK (selected_cellrenderertoggle_toggled_cb),
+			  self);
+	g_signal_connect (GET_WIDGET ("name_cellrenderertext"),
+			  "edited",
+			  G_CALLBACK (name_cellrenderertext_edited_cb),
+			  self);
+	g_signal_connect (GET_WIDGET ("new_button"),
+			  "clicked",
+			  G_CALLBACK (new_button_clicked_cb),
+			  self);
+	g_signal_connect (GET_WIDGET ("delete_button"),
+			  "clicked",
+			  G_CALLBACK (delete_button_clicked_cb),
+			  self);
+
+	tags = g_strdupv (gth_tags_file_get_tags (gth_main_get_default_tag_file ()));
+	for (i = 0; tags[i] != NULL; i++) {
+		GtkTreeIter iter;
+
+		gtk_list_store_append (GTK_LIST_STORE (GET_WIDGET ("tags_liststore")), &iter);
+		gtk_list_store_set (GTK_LIST_STORE (GET_WIDGET ("tags_liststore")), &iter,
+				    NAME_COLUMN, tags[i],
+				    SELECTED_COLUMN, 0,
+				    -1);
+	}
+
+	g_strfreev (tags);
+}
+
+
+GType
+gth_tag_chooser_dialog_get_type (void)
+{
+	static GType type = 0;
+
+	if (type == 0) {
+		static const GTypeInfo g_define_type_info = {
+			sizeof (GthTagChooserDialogClass),
+			(GBaseInitFunc) NULL,
+			(GBaseFinalizeFunc) NULL,
+			(GClassInitFunc) gth_tag_chooser_dialog_class_init,
+			(GClassFinalizeFunc) NULL,
+			NULL,
+			sizeof (GthTagChooserDialog),
+			0,
+			(GInstanceInitFunc) gth_tag_chooser_dialog_init,
+			NULL
+		};
+		type = g_type_register_static (GTK_TYPE_DIALOG,
+					       "GthTagChooserDialog",
+					       &g_define_type_info,
+					       0);
+	}
+
+	return type;
+}
+
+
+GtkWidget *
+gth_tag_chooser_dialog_new (void)
+{
+	return (GtkWidget *) g_object_new (GTH_TYPE_TAG_CHOOSER_DIALOG, NULL);
+}
+
+
+char **
+gth_tag_chooser_dialog_get_tags (GthTagChooserDialog *self)
+{
+	GtkTreeModel  *model;
+	GtkTreeIter    iter;
+	GList         *tag_list;
+	char         **tags;
+
+	tag_list = NULL;
+	model = GTK_TREE_MODEL (GET_WIDGET ("tags_liststore"));
+	if (gtk_tree_model_get_iter_first (model, &iter)) {
+		do {
+			gboolean  selected;
+			char     *name;
+
+			gtk_tree_model_get (model, &iter,
+					    SELECTED_COLUMN, &selected,
+					    NAME_COLUMN, &name,
+					    -1);
+			if (selected)
+				tag_list = g_list_append (tag_list, name);
+			else
+				g_free (name);
+		}
+		while (gtk_tree_model_iter_next (model, &iter));
+	}
+
+	tags = _g_string_list_to_strv (tag_list);
+	_g_string_list_free (tag_list);
+
+	return tags;
+}
diff --git a/extensions/edit_metadata/gth-tag-chooser-dialog.h b/extensions/edit_metadata/gth-tag-chooser-dialog.h
new file mode 100644
index 0000000..2215fe0
--- /dev/null
+++ b/extensions/edit_metadata/gth-tag-chooser-dialog.h
@@ -0,0 +1,59 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/*
+ *  GThumb
+ *
+ *  Copyright (C) 2010 Free Software Foundation, Inc.
+ *
+ *  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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+ 
+#ifndef GTH_TAG_CHOOSER_DIALOG_H
+#define GTH_TAG_CHOOSER_DIALOG_H
+
+#include <gtk/gtk.h>
+#include <gthumb.h>
+
+G_BEGIN_DECLS
+
+#define GTH_TYPE_TAG_CHOOSER_DIALOG            (gth_tag_chooser_dialog_get_type ())
+#define GTH_TAG_CHOOSER_DIALOG(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTH_TYPE_TAG_CHOOSER_DIALOG, GthTagChooserDialog))
+#define GTH_TAG_CHOOSER_DIALOG_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GTH_TYPE_TAG_CHOOSER_DIALOG, GthTagChooserDialogClass))
+#define GTH_IS_TAG_CHOOSER_DIALOG(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTH_TYPE_TAG_CHOOSER_DIALOG))
+#define GTH_IS_TAG_CHOOSER_DIALOG_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTH_TYPE_TAG_CHOOSER_DIALOG))
+#define GTH_TAG_CHOOSER_DIALOG_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTH_TYPE_TAG_CHOOSER_DIALOG, GthTagChooserDialogClass))
+
+typedef struct _GthTagChooserDialog GthTagChooserDialog;
+typedef struct _GthTagChooserDialogClass GthTagChooserDialogClass;
+typedef struct _GthTagChooserDialogPrivate GthTagChooserDialogPrivate;
+
+struct _GthTagChooserDialog {
+	GtkDialog parent_instance;
+	GthTagChooserDialogPrivate *priv;
+};
+
+struct _GthTagChooserDialogClass {
+	GtkDialogClass parent_class;
+};
+
+/* GthTagChooserDialog */
+
+GType          gth_tag_chooser_dialog_get_type  (void);
+GtkWidget *    gth_tag_chooser_dialog_new       (void);
+char **        gth_tag_chooser_dialog_get_tags  (GthTagChooserDialog *dialog);
+
+G_END_DECLS
+
+#endif /* GTH_TAG_CHOOSER_DIALOG_H */
diff --git a/extensions/edit_metadata/gth-tag-task.c b/extensions/edit_metadata/gth-tag-task.c
new file mode 100644
index 0000000..d27035f
--- /dev/null
+++ b/extensions/edit_metadata/gth-tag-task.c
@@ -0,0 +1,206 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/*
+ *  GThumb
+ *
+ *  Copyright (C) 2010 Free Software Foundation, Inc.
+ *
+ *  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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+#include "gth-tag-task.h"
+
+
+struct _GthTagTaskPrivate {
+	GList         *file_list;
+	GList         *file_data_list;
+	GthStringList *tags;
+};
+
+
+static gpointer parent_class = NULL;
+
+
+static void
+gth_tag_task_finalize (GObject *object)
+{
+	GthTagTask *self;
+
+	self = GTH_TAG_TASK (object);
+
+	_g_object_unref (self->priv->tags);
+	_g_object_list_unref (self->priv->file_list);
+	_g_object_list_unref (self->priv->file_data_list);
+
+	G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+
+static void
+write_metadata_ready_cb (GError   *error,
+			 gpointer  user_data)
+{
+	GthTagTask *self = user_data;
+	GthMonitor *monitor;
+	GList      *scan;
+
+	if (error != NULL) {
+		gth_task_completed (GTH_TASK (self), error);
+		return;
+	}
+
+	monitor = gth_main_get_default_monitor ();
+	for (scan = self->priv->file_data_list; scan; scan = scan->next) {
+		GthFileData *file_data = scan->data;
+		GFile       *parent;
+		GList       *files;
+
+		parent = g_file_get_parent (file_data->file);
+		files = g_list_prepend (NULL, g_object_ref (file_data->file));
+		gth_monitor_folder_changed (monitor, parent, files, GTH_MONITOR_EVENT_CHANGED);
+		gth_monitor_metadata_changed (monitor, file_data);
+
+		_g_object_list_unref (files);
+		g_object_unref (parent);
+	}
+
+	gth_task_completed (GTH_TASK (self), NULL);
+}
+
+
+static void
+info_ready_cb (GList    *files,
+	       GError   *error,
+	       gpointer  user_data)
+{
+	GthTagTask *self = user_data;
+	GList      *scan;
+
+	if (error != NULL) {
+		gth_task_completed (GTH_TASK (self), error);
+		return;
+	}
+
+	self->priv->file_data_list = _g_object_list_ref (files);
+	for (scan = self->priv->file_data_list; scan; scan = scan->next) {
+		GthFileData   *file_data = scan->data;
+		GthStringList *original_tags;
+		GthStringList *new_tags;
+
+		original_tags = (GthStringList *) g_file_info_get_attribute_object (file_data->info, "general::tags");
+
+		new_tags = gth_string_list_new (NULL);
+		gth_string_list_append (new_tags, original_tags);
+		gth_string_list_append (new_tags, self->priv->tags);
+
+		g_file_info_set_attribute_object (file_data->info, "general::tags", G_OBJECT (new_tags));
+
+		g_object_unref (new_tags);
+	}
+
+	gth_task_progress (GTH_TASK (self), _("Assigning tags to the selected files"), _("Writing files"), TRUE, 0.0);
+	_g_write_metadata_async (self->priv->file_data_list,
+			         "general::tags",
+			         gth_task_get_cancellable (GTH_TASK (self)),
+			         write_metadata_ready_cb,
+			         self);
+}
+
+
+static void
+gth_tag_task_exec (GthTask *task)
+{
+	GthTagTask *self;
+
+	self = GTH_TAG_TASK (task);
+
+	gth_task_progress (task, _("Assigning tags to the selected files"), _("Reading files"), TRUE, 0.0);
+	_g_query_all_metadata_async (self->priv->file_list,
+				     FALSE,
+				     TRUE,
+				     "*",
+				     NULL,
+				     info_ready_cb,
+				     self);
+}
+
+
+static void
+gth_tag_task_class_init (GthTagTaskClass *klass)
+{
+	GObjectClass *object_class;
+	GthTaskClass *task_class;
+
+	parent_class = g_type_class_peek_parent (klass);
+	g_type_class_add_private (klass, sizeof (GthTagTaskPrivate));
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = gth_tag_task_finalize;
+
+	task_class = GTH_TASK_CLASS (klass);
+	task_class->exec = gth_tag_task_exec;
+}
+
+
+static void
+gth_tag_task_init (GthTagTask *self)
+{
+	self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GTH_TYPE_TAG_TASK, GthTagTaskPrivate);
+	self->priv->file_list = NULL;
+	self->priv->file_data_list = NULL;
+}
+
+
+GType
+gth_tag_task_get_type (void)
+{
+	static GType type = 0;
+
+	if (! type) {
+		GTypeInfo type_info = {
+			sizeof (GthTagTaskClass),
+			NULL,
+			NULL,
+			(GClassInitFunc) gth_tag_task_class_init,
+			NULL,
+			NULL,
+			sizeof (GthTagTask),
+			0,
+			(GInstanceInitFunc) gth_tag_task_init
+		};
+
+		type = g_type_register_static (GTH_TYPE_TASK,
+					       "GthTagTask",
+					       &type_info,
+					       0);
+	}
+
+	return type;
+}
+
+
+GthTask *
+gth_tag_task_new (GList  *file_list,
+		  char  **tags)
+{
+	GthTagTask *self;
+
+	self = GTH_TAG_TASK (g_object_new (GTH_TYPE_TAG_TASK, NULL));
+	self->priv->file_list = _g_object_list_ref (file_list);
+	self->priv->tags = gth_string_list_new_from_strv (tags);
+
+	return (GthTask *) self;
+}
diff --git a/extensions/edit_metadata/gth-tag-task.h b/extensions/edit_metadata/gth-tag-task.h
new file mode 100644
index 0000000..71c7441
--- /dev/null
+++ b/extensions/edit_metadata/gth-tag-task.h
@@ -0,0 +1,57 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/*
+ *  GThumb
+ *
+ *  Copyright (C) 2010 The Free Software Foundation, Inc.
+ *
+ *  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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef GTH_TAG_TASK_H
+#define GTH_TAG_TASK_H
+
+#include <glib.h>
+#include <gthumb.h>
+
+G_BEGIN_DECLS
+
+#define GTH_TYPE_TAG_TASK            (gth_tag_task_get_type ())
+#define GTH_TAG_TASK(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTH_TYPE_TAG_TASK, GthTagTask))
+#define GTH_TAG_TASK_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GTH_TYPE_TAG_TASK, GthTagTaskClass))
+#define GTH_IS_TAG_TASK(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTH_TYPE_TAG_TASK))
+#define GTH_IS_TAG_TASK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTH_TYPE_TAG_TASK))
+#define GTH_TAG_TASK_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj), GTH_TYPE_TAG_TASK, GthTagTaskClass))
+
+typedef struct _GthTagTask        GthTagTask;
+typedef struct _GthTagTaskClass   GthTagTaskClass;
+typedef struct _GthTagTaskPrivate GthTagTaskPrivate;
+
+struct _GthTagTask {
+	GthTask __parent;
+	GthTagTaskPrivate *priv;
+};
+
+struct _GthTagTaskClass {
+	GthTaskClass __parent;
+};
+
+GType         gth_tag_task_get_type     (void);
+GthTask *     gth_tag_task_new          (GList  *files, /* GFile */
+					 char  **tags);
+
+G_END_DECLS
+
+#endif /* GTH_TAG_TASK_H */
diff --git a/extensions/edit_metadata/main.c b/extensions/edit_metadata/main.c
index 972bf3a..e3bd1c3 100644
--- a/extensions/edit_metadata/main.c
+++ b/extensions/edit_metadata/main.c
@@ -35,7 +35,8 @@ gthumb_extension_activate (void)
 	gth_hook_add_callback ("gth-browser-construct", 5, G_CALLBACK (edit_metadata__gth_browser_construct_cb), NULL);
 	gth_hook_add_callback ("gth-browser-set-current-page", 5, G_CALLBACK (edit_metadata__gth_browser_set_current_page_cb), NULL);
 	gth_hook_add_callback ("gth-browser-update-sensitivity", 10, G_CALLBACK (edit_metadata__gth_browser_update_sensitivity_cb), NULL);
-
+	gth_hook_add_callback ("gth-browser-file-list-popup-before", 5, G_CALLBACK (edit_metadata__gth_browser_file_list_popup_before_cb), NULL);
+	gth_hook_add_callback ("gth-browser-file-popup-before", 5, G_CALLBACK (edit_metadata__gth_browser_file_popup_before_cb), NULL);
 }
 
 
diff --git a/gthumb/gth-main.c b/gthumb/gth-main.c
index ffee3a5..59bbeb1 100644
--- a/gthumb/gth-main.c
+++ b/gthumb/gth-main.c
@@ -1151,10 +1151,9 @@ gth_main_tags_changed (void)
 	gth_user_dir_make_dir_for_file (GTH_DIR_CONFIG, GTHUMB_DIR, TAGS_FILE, NULL);
 	filename = gth_user_dir_get_file (GTH_DIR_CONFIG, GTHUMB_DIR, TAGS_FILE, NULL);
 	gth_tags_file_to_file (Main->priv->tags, filename, NULL);
+	gth_monitor_tags_changed (gth_main_get_default_monitor ());
 
 	g_free (filename);
-
-	gth_monitor_tags_changed (gth_main_get_default_monitor ());
 }
 
 
diff --git a/gthumb/gth-string-list.c b/gthumb/gth-string-list.c
index d17b33d..e159403 100644
--- a/gthumb/gth-string-list.c
+++ b/gthumb/gth-string-list.c
@@ -182,3 +182,15 @@ gth_string_list_equal (GthStringList  *list1,
 
 	return TRUE;
 }
+
+
+void
+gth_string_list_append (GthStringList *list1,
+			GthStringList *list2)
+{
+	GList *scan;
+
+	for (scan = list2->priv->list; scan; scan = scan->next)
+		if (! g_list_find_custom (list1->priv->list, scan->data, (GCompareFunc) strcmp))
+			list1->priv->list = g_list_append (list1->priv->list, g_strdup (scan->data));
+}
diff --git a/gthumb/gth-string-list.h b/gthumb/gth-string-list.h
index 125c63a..fa36441 100644
--- a/gthumb/gth-string-list.h
+++ b/gthumb/gth-string-list.h
@@ -57,6 +57,8 @@ char *            gth_string_list_join                (GthStringList  *list,
 						       const char     *separator);
 gboolean          gth_string_list_equal               (GthStringList  *list1,
 						       GthStringList  *list2);
+void              gth_string_list_append              (GthStringList  *list1,
+		       	       	       	       	       GthStringList  *list2);
 
 G_END_DECLS
 



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