1 files changed, 99 insertions, 0 deletions
diff --git a/app/core/gimpundo.h b/app/core/gimpundo.h
new file mode 100644
index 0000000..03d03c2
--- /dev/null
+++ b/app/core/gimpundo.h
@@ -0,0 +1,99 @@
+/* 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/>.
+ */
+
+#ifndef __GIMP_UNDO_H__
+#define __GIMP_UNDO_H__
+
+
+#include "gimpviewable.h"
+
+
+struct _GimpUndoAccumulator
+{
+  gboolean mode_changed;
+  gboolean precision_changed;
+
+  gboolean size_changed;
+  gint     previous_origin_x;
+  gint     previous_origin_y;
+  gint     previous_width;
+  gint     previous_height;
+
+  gboolean resolution_changed;
+
+  gboolean unit_changed;
+};
+
+
+#define GIMP_TYPE_UNDO            (gimp_undo_get_type ())
+#define GIMP_UNDO(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_UNDO, GimpUndo))
+#define GIMP_UNDO_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_UNDO, GimpUndoClass))
+#define GIMP_IS_UNDO(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_UNDO))
+#define GIMP_IS_UNDO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_UNDO))
+#define GIMP_UNDO_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_UNDO, GimpUndoClass))
+
+
+typedef struct _GimpUndoClass GimpUndoClass;
+
+struct _GimpUndo
+{
+  GimpViewable      parent_instance;
+
+  GimpImage        *image;          /* the image this undo is part of     */
+  guint             time;           /* time of undo step construction     */
+
+  GimpUndoType      undo_type;      /* undo type                          */
+  GimpDirtyMask     dirty_mask;     /* affected parts of the image        */
+
+  GimpTempBuf      *preview;
+  guint             preview_idle_id;
+};
+
+struct _GimpUndoClass
+{
+  GimpViewableClass  parent_class;
+
+  void (* pop)  (GimpUndo            *undo,
+                 GimpUndoMode         undo_mode,
+                 GimpUndoAccumulator *accum);
+  void (* free) (GimpUndo            *undo,
+                 GimpUndoMode         undo_mode);
+};
+
+
+GType         gimp_undo_get_type        (void) G_GNUC_CONST;
+
+void          gimp_undo_pop             (GimpUndo            *undo,
+                                         GimpUndoMode         undo_mode,
+                                         GimpUndoAccumulator *accum);
+void          gimp_undo_free            (GimpUndo            *undo,
+                                         GimpUndoMode         undo_mode);
+
+void          gimp_undo_create_preview  (GimpUndo            *undo,
+                                         GimpContext         *context,
+                                         gboolean             create_now);
+void          gimp_undo_refresh_preview (GimpUndo            *undo,
+                                         GimpContext         *context);
+
+const gchar * gimp_undo_type_to_name    (GimpUndoType         type);
+
+gboolean      gimp_undo_is_weak         (GimpUndo            *undo);
+gint          gimp_undo_get_age         (GimpUndo            *undo);
+void          gimp_undo_reset_age       (GimpUndo            *undo);
+
+
+#endif /* __GIMP_UNDO_H__ */