1 files changed, 198 insertions, 0 deletions
diff --git a/app/core/gimpobjectqueue.c b/app/core/gimpobjectqueue.c
new file mode 100644
index 0000000..edadc09
--- /dev/null
+++ b/app/core/gimpobjectqueue.c
@@ -0,0 +1,198 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <glib-object.h>
+
+#include "core-types.h"
+
+#include "gimpcontainer.h"
+#include "gimpobject.h"
+#include "gimpobjectqueue.h"
+#include "gimpprogress.h"
+
+
+typedef struct
+{
+  GimpObject *object;
+  gint64      memsize;
+} Item;
+
+
+static void   gimp_object_queue_dispose      (GObject         *object);
+
+static void   gimp_object_queue_push_swapped (gpointer         object,
+                                              GimpObjectQueue *queue);
+
+static Item * gimp_object_queue_item_new     (GimpObject      *object);
+static void   gimp_object_queue_item_free    (Item            *item);
+
+
+G_DEFINE_TYPE (GimpObjectQueue, gimp_object_queue, GIMP_TYPE_SUB_PROGRESS);
+
+#define parent_class gimp_object_queue_parent_class
+
+
+/*  private functions  */
+
+
+static void
+gimp_object_queue_class_init (GimpObjectQueueClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = gimp_object_queue_dispose;
+}
+
+static void
+gimp_object_queue_init (GimpObjectQueue *queue)
+{
+  g_queue_init (&queue->items);
+
+  queue->processed_memsize = 0;
+  queue->total_memsize     = 0;
+}
+
+static void
+gimp_object_queue_dispose (GObject *object)
+{
+  gimp_object_queue_clear (GIMP_OBJECT_QUEUE (object));
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gimp_object_queue_push_swapped (gpointer         object,
+                                GimpObjectQueue *queue)
+{
+  gimp_object_queue_push (queue, object);
+}
+
+static Item *
+gimp_object_queue_item_new (GimpObject *object)
+{
+  Item *item = g_slice_new (Item);
+
+  item->object  = object;
+  item->memsize = gimp_object_get_memsize (object, NULL);
+
+  return item;
+}
+
+static void
+gimp_object_queue_item_free (Item *item)
+{
+  g_slice_free (Item, item);
+}
+
+
+/*  public functions  */
+
+
+GimpObjectQueue *
+gimp_object_queue_new (GimpProgress *progress)
+{
+  g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
+
+  return g_object_new (GIMP_TYPE_OBJECT_QUEUE,
+                       "progress", progress,
+                       NULL);
+}
+
+void
+gimp_object_queue_clear (GimpObjectQueue *queue)
+{
+  Item *item;
+
+  g_return_if_fail (GIMP_IS_OBJECT_QUEUE (queue));
+
+  while ((item = g_queue_pop_head (&queue->items)))
+    gimp_object_queue_item_free (item);
+
+  queue->processed_memsize = 0;
+  queue->total_memsize     = 0;
+
+  gimp_sub_progress_set_range (GIMP_SUB_PROGRESS (queue), 0.0, 1.0);
+}
+
+void
+gimp_object_queue_push (GimpObjectQueue *queue,
+                        gpointer         object)
+{
+  Item *item;
+
+  g_return_if_fail (GIMP_IS_OBJECT_QUEUE (queue));
+  g_return_if_fail (GIMP_IS_OBJECT (object));
+
+  item = gimp_object_queue_item_new (GIMP_OBJECT (object));
+
+  g_queue_push_tail (&queue->items, item);
+
+  queue->total_memsize += item->memsize;
+}
+
+void
+gimp_object_queue_push_container (GimpObjectQueue *queue,
+                                  GimpContainer   *container)
+{
+  g_return_if_fail (GIMP_IS_OBJECT_QUEUE (queue));
+  g_return_if_fail (GIMP_IS_CONTAINER (container));
+
+  gimp_container_foreach (container,
+                          (GFunc) gimp_object_queue_push_swapped,
+                          queue);
+}
+
+void
+gimp_object_queue_push_list (GimpObjectQueue *queue,
+                             GList           *list)
+{
+  g_return_if_fail (GIMP_IS_OBJECT_QUEUE (queue));
+
+  g_list_foreach (list,
+                  (GFunc) gimp_object_queue_push_swapped,
+                  queue);
+}
+
+gpointer
+gimp_object_queue_pop (GimpObjectQueue *queue)
+{
+  Item       *item;
+  GimpObject *object;
+
+  g_return_val_if_fail (GIMP_IS_OBJECT_QUEUE (queue), NULL);
+
+  item = g_queue_pop_head (&queue->items);
+
+  if (! item)
+    return NULL;
+
+  object = item->object;
+
+  gimp_sub_progress_set_range (GIMP_SUB_PROGRESS (queue),
+                               (gdouble) queue->processed_memsize  /
+                               (gdouble) queue->total_memsize,
+                               (gdouble) (queue->processed_memsize +
+                                          item->memsize)              /
+                               (gdouble) queue->total_memsize);
+  queue->processed_memsize += item->memsize;
+
+  gimp_object_queue_item_free (item);
+
+  return object;
+}