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-rw-r--r--app/core/gimptreehandler.c238
1 files changed, 238 insertions, 0 deletions
diff --git a/app/core/gimptreehandler.c b/app/core/gimptreehandler.c
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+++ b/app/core/gimptreehandler.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * GimpTreeHandler
+ * Copyright (C) 2009 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "core-types.h"
+
+#include "gimpcontainer.h"
+#include "gimptreehandler.h"
+#include "gimpviewable.h"
+
+
+static void gimp_tree_handler_dispose (GObject *object);
+
+static void gimp_tree_handler_freeze (GimpTreeHandler *handler,
+ GimpContainer *container);
+static void gimp_tree_handler_thaw (GimpTreeHandler *handler,
+ GimpContainer *container);
+
+static void gimp_tree_handler_add_container (GimpTreeHandler *handler,
+ GimpContainer *container);
+static void gimp_tree_handler_add_foreach (GimpViewable *viewable,
+ GimpTreeHandler *handler);
+static void gimp_tree_handler_add (GimpTreeHandler *handler,
+ GimpViewable *viewable,
+ GimpContainer *container);
+
+static void gimp_tree_handler_remove_container (GimpTreeHandler *handler,
+ GimpContainer *container);
+static void gimp_tree_handler_remove_foreach (GimpViewable *viewable,
+ GimpTreeHandler *handler);
+static void gimp_tree_handler_remove (GimpTreeHandler *handler,
+ GimpViewable *viewable,
+ GimpContainer *container);
+
+
+G_DEFINE_TYPE (GimpTreeHandler, gimp_tree_handler, GIMP_TYPE_OBJECT)
+
+#define parent_class gimp_tree_handler_parent_class
+
+
+static void
+gimp_tree_handler_class_init (GimpTreeHandlerClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->dispose = gimp_tree_handler_dispose;
+}
+
+static void
+gimp_tree_handler_init (GimpTreeHandler *handler)
+{
+}
+
+static void
+gimp_tree_handler_dispose (GObject *object)
+{
+ GimpTreeHandler *handler = GIMP_TREE_HANDLER (object);
+
+ if (handler->container)
+ {
+ g_signal_handlers_disconnect_by_func (handler->container,
+ gimp_tree_handler_freeze,
+ handler);
+ g_signal_handlers_disconnect_by_func (handler->container,
+ gimp_tree_handler_thaw,
+ handler);
+
+ if (! gimp_container_frozen (handler->container))
+ gimp_tree_handler_remove_container (handler, handler->container);
+
+ g_clear_object (&handler->container);
+ g_clear_pointer (&handler->signal_name, g_free);
+ }
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+
+/* public functions */
+
+GimpTreeHandler *
+gimp_tree_handler_connect (GimpContainer *container,
+ const gchar *signal_name,
+ GCallback callback,
+ gpointer user_data)
+{
+ GimpTreeHandler *handler;
+
+ g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
+ g_return_val_if_fail (signal_name != NULL, NULL);
+
+ handler = g_object_new (GIMP_TYPE_TREE_HANDLER, NULL);
+
+ handler->container = g_object_ref (container);
+ handler->signal_name = g_strdup (signal_name);
+ handler->callback = callback;
+ handler->user_data = user_data;
+
+ if (! gimp_container_frozen (container))
+ gimp_tree_handler_add_container (handler, container);
+
+ g_signal_connect_object (container, "freeze",
+ G_CALLBACK (gimp_tree_handler_freeze),
+ handler,
+ G_CONNECT_SWAPPED);
+ g_signal_connect_object (container, "thaw",
+ G_CALLBACK (gimp_tree_handler_thaw),
+ handler,
+ G_CONNECT_SWAPPED);
+
+ return handler;
+}
+
+void
+gimp_tree_handler_disconnect (GimpTreeHandler *handler)
+{
+ g_return_if_fail (GIMP_IS_TREE_HANDLER (handler));
+
+ g_object_run_dispose (G_OBJECT (handler));
+ g_object_unref (handler);
+}
+
+
+/* private functions */
+
+static void
+gimp_tree_handler_freeze (GimpTreeHandler *handler,
+ GimpContainer *container)
+{
+ gimp_tree_handler_remove_container (handler, container);
+}
+
+static void
+gimp_tree_handler_thaw (GimpTreeHandler *handler,
+ GimpContainer *container)
+{
+ gimp_tree_handler_add_container (handler, container);
+}
+
+static void
+gimp_tree_handler_add_container (GimpTreeHandler *handler,
+ GimpContainer *container)
+{
+ gimp_container_foreach (container,
+ (GFunc) gimp_tree_handler_add_foreach,
+ handler);
+
+ g_signal_connect_object (container, "add",
+ G_CALLBACK (gimp_tree_handler_add),
+ handler,
+ G_CONNECT_SWAPPED);
+ g_signal_connect_object (container, "remove",
+ G_CALLBACK (gimp_tree_handler_remove),
+ handler,
+ G_CONNECT_SWAPPED);
+}
+
+static void
+gimp_tree_handler_add_foreach (GimpViewable *viewable,
+ GimpTreeHandler *handler)
+{
+ gimp_tree_handler_add (handler, viewable, NULL);
+}
+
+static void
+gimp_tree_handler_add (GimpTreeHandler *handler,
+ GimpViewable *viewable,
+ GimpContainer *unused)
+{
+ GimpContainer *children = gimp_viewable_get_children (viewable);
+
+ g_signal_connect (viewable,
+ handler->signal_name,
+ handler->callback,
+ handler->user_data);
+
+ if (children)
+ gimp_tree_handler_add_container (handler, children);
+}
+
+static void
+gimp_tree_handler_remove_container (GimpTreeHandler *handler,
+ GimpContainer *container)
+{
+ g_signal_handlers_disconnect_by_func (container,
+ gimp_tree_handler_add,
+ handler);
+ g_signal_handlers_disconnect_by_func (container,
+ gimp_tree_handler_remove,
+ handler);
+
+ gimp_container_foreach (container,
+ (GFunc) gimp_tree_handler_remove_foreach,
+ handler);
+}
+
+static void
+gimp_tree_handler_remove_foreach (GimpViewable *viewable,
+ GimpTreeHandler *handler)
+{
+ gimp_tree_handler_remove (handler, viewable, NULL);
+}
+
+static void
+gimp_tree_handler_remove (GimpTreeHandler *handler,
+ GimpViewable *viewable,
+ GimpContainer *unused)
+{
+ GimpContainer *children = gimp_viewable_get_children (viewable);
+
+ if (children)
+ gimp_tree_handler_remove_container (handler, children);
+
+ g_signal_handlers_disconnect_by_func (viewable,
+ handler->callback,
+ handler->user_data);
+}