1 files changed, 135 insertions, 0 deletions
diff --git a/app/core/gimpfloatingselectionundo.c b/app/core/gimpfloatingselectionundo.c
new file mode 100644
index 0000000..6ca28ab
--- /dev/null
+++ b/app/core/gimpfloatingselectionundo.c
@@ -0,0 +1,135 @@
+/* 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 <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "core-types.h"
+
+#include "gimpdrawable-floating-selection.h"
+#include "gimpfloatingselectionundo.h"
+#include "gimpimage.h"
+#include "gimplayer.h"
+#include "gimplayer-floating-selection.h"
+
+
+static void   gimp_floating_selection_undo_constructed (GObject             *object);
+
+static void   gimp_floating_selection_undo_pop         (GimpUndo            *undo,
+                                                        GimpUndoMode         undo_mode,
+                                                        GimpUndoAccumulator *accum);
+
+
+G_DEFINE_TYPE (GimpFloatingSelectionUndo, gimp_floating_selection_undo,
+               GIMP_TYPE_ITEM_UNDO)
+
+#define parent_class gimp_floating_selection_undo_parent_class
+
+
+static void
+gimp_floating_selection_undo_class_init (GimpFloatingSelectionUndoClass *klass)
+{
+  GObjectClass  *object_class = G_OBJECT_CLASS (klass);
+  GimpUndoClass *undo_class   = GIMP_UNDO_CLASS (klass);
+
+  object_class->constructed = gimp_floating_selection_undo_constructed;
+
+  undo_class->pop           = gimp_floating_selection_undo_pop;
+}
+
+static void
+gimp_floating_selection_undo_init (GimpFloatingSelectionUndo *undo)
+{
+}
+
+static void
+gimp_floating_selection_undo_constructed (GObject *object)
+{
+  GimpFloatingSelectionUndo *floating_sel_undo;
+  GimpLayer                 *layer;
+
+  floating_sel_undo = GIMP_FLOATING_SELECTION_UNDO (object);
+
+  G_OBJECT_CLASS (parent_class)->constructed (object);
+
+  gimp_assert (GIMP_IS_LAYER (GIMP_ITEM_UNDO (object)->item));
+
+  layer = GIMP_LAYER (GIMP_ITEM_UNDO (object)->item);
+
+  switch (GIMP_UNDO (object)->undo_type)
+    {
+    case GIMP_UNDO_FS_TO_LAYER:
+      floating_sel_undo->drawable = gimp_layer_get_floating_sel_drawable (layer);
+      break;
+
+    default:
+      g_return_if_reached ();
+    }
+}
+
+static void
+gimp_floating_selection_undo_pop (GimpUndo            *undo,
+                                  GimpUndoMode         undo_mode,
+                                  GimpUndoAccumulator *accum)
+{
+  GimpFloatingSelectionUndo *floating_sel_undo;
+  GimpLayer                 *floating_layer;
+
+  floating_sel_undo = GIMP_FLOATING_SELECTION_UNDO (undo);
+  floating_layer    = GIMP_LAYER (GIMP_ITEM_UNDO (undo)->item);
+
+  GIMP_UNDO_CLASS (parent_class)->pop (undo, undo_mode, accum);
+
+  switch (undo->undo_type)
+    {
+    case GIMP_UNDO_FS_TO_LAYER:
+      if (undo_mode == GIMP_UNDO_MODE_UNDO)
+        {
+          /*  Update the preview for the floating selection  */
+          gimp_viewable_invalidate_preview (GIMP_VIEWABLE (floating_layer));
+
+          gimp_layer_set_floating_sel_drawable (floating_layer,
+                                                floating_sel_undo->drawable);
+          gimp_image_set_active_layer (undo->image, floating_layer);
+
+          gimp_drawable_attach_floating_sel (gimp_layer_get_floating_sel_drawable (floating_layer),
+                                             floating_layer);
+        }
+      else
+        {
+          gimp_drawable_detach_floating_sel (gimp_layer_get_floating_sel_drawable (floating_layer));
+          gimp_layer_set_floating_sel_drawable (floating_layer, NULL);
+        }
+
+      /* When the floating selection is converted to/from a normal
+       * layer it does something resembling a name change, so emit the
+       * "name-changed" signal
+       */
+      gimp_object_name_changed (GIMP_OBJECT (floating_layer));
+
+      gimp_drawable_update (GIMP_DRAWABLE (floating_layer),
+                            0, 0,
+                            gimp_item_get_width  (GIMP_ITEM (floating_layer)),
+                            gimp_item_get_height (GIMP_ITEM (floating_layer)));
+      break;
+
+    default:
+      g_return_if_reached ();
+    }
+}