1 files changed, 125 insertions, 0 deletions
diff --git a/app/paint/gimpinkundo.c b/app/paint/gimpinkundo.c
new file mode 100644
index 0000000..a0b604b
--- /dev/null
+++ b/app/paint/gimpinkundo.c
@@ -0,0 +1,125 @@
+/* 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 <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "paint-types.h"
+
+#include "gimpink.h"
+#include "gimpink-blob.h"
+#include "gimpinkundo.h"
+
+
+static void   gimp_ink_undo_constructed (GObject             *object);
+
+static void   gimp_ink_undo_pop         (GimpUndo            *undo,
+                                         GimpUndoMode         undo_mode,
+                                         GimpUndoAccumulator *accum);
+static void   gimp_ink_undo_free        (GimpUndo            *undo,
+                                         GimpUndoMode         undo_mode);
+
+
+G_DEFINE_TYPE (GimpInkUndo, gimp_ink_undo, GIMP_TYPE_PAINT_CORE_UNDO)
+
+#define parent_class gimp_ink_undo_parent_class
+
+
+static void
+gimp_ink_undo_class_init (GimpInkUndoClass *klass)
+{
+  GObjectClass  *object_class = G_OBJECT_CLASS (klass);
+  GimpUndoClass *undo_class   = GIMP_UNDO_CLASS (klass);
+
+  object_class->constructed = gimp_ink_undo_constructed;
+
+  undo_class->pop           = gimp_ink_undo_pop;
+  undo_class->free          = gimp_ink_undo_free;
+}
+
+static void
+gimp_ink_undo_init (GimpInkUndo *undo)
+{
+  undo->last_blobs = NULL;
+}
+
+static void
+gimp_ink_undo_constructed (GObject *object)
+{
+  GimpInkUndo *ink_undo = GIMP_INK_UNDO (object);
+  GimpInk     *ink;
+
+  G_OBJECT_CLASS (parent_class)->constructed (object);
+
+  gimp_assert (GIMP_IS_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core));
+
+  ink = GIMP_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core);
+
+  if (ink->start_blobs)
+    {
+      gint      i;
+      GimpBlob *blob;
+
+      for (i = 0; i < g_list_length (ink->start_blobs); i++)
+        {
+          blob = g_list_nth_data (ink->start_blobs, i);
+
+          ink_undo->last_blobs = g_list_prepend (ink_undo->last_blobs,
+                                                 gimp_blob_duplicate (blob));
+        }
+      ink_undo->last_blobs = g_list_reverse (ink_undo->last_blobs);
+    }
+}
+
+static void
+gimp_ink_undo_pop (GimpUndo              *undo,
+                   GimpUndoMode           undo_mode,
+                   GimpUndoAccumulator   *accum)
+{
+  GimpInkUndo *ink_undo = GIMP_INK_UNDO (undo);
+
+  GIMP_UNDO_CLASS (parent_class)->pop (undo, undo_mode, accum);
+
+  if (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core)
+    {
+      GimpInk  *ink = GIMP_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core);
+      GList    *tmp_blobs;
+
+      tmp_blobs = ink->last_blobs;
+      ink->last_blobs = ink_undo->last_blobs;
+      ink_undo->last_blobs = tmp_blobs;
+    }
+}
+
+static void
+gimp_ink_undo_free (GimpUndo     *undo,
+                    GimpUndoMode  undo_mode)
+{
+  GimpInkUndo *ink_undo = GIMP_INK_UNDO (undo);
+
+  if (ink_undo->last_blobs)
+    {
+      g_list_free_full (ink_undo->last_blobs, g_free);
+      ink_undo->last_blobs = NULL;
+    }
+
+  GIMP_UNDO_CLASS (parent_class)->free (undo, undo_mode);
+}