Ticket #3662: 3662_2.patch

_source/plugins/undo/plugin.js

@@ -46 +46 @@
                                         canUndo : false
                                 });
 
+                        editor.on( 'resetUndo', function()
+                                {
+                                        // Reset the undo stack.
+                                        undoManager.reset();
+
+                                        // Create the first image.
+                                        editor.fire( 'saveSnapshot' );
+                                });
+
                         undoManager.onChange = function()
                         {
                                 undoCommand.setState( undoManager.undoable() ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED );
@@ -107 +116 @@
                                         label : editor.lang.redo,
                                         command : 'redo'
                                 });
+                                
+                        editor.resetUndo = function()
+                        {
+                                editor.fire( "resetUndo" );
+                        }
                 }
         });
 
@@ -166 +180 @@
          */
         function UndoManager( editor )
         {
-                this.typesCount = 0;
-                this.modifiersCount = 0;
-
                 this.editor = editor;
 
-                /**
-                 * Stack for all the undo and redo snapshots, they're always created/removed
-                 * in consistency.
-                 */
-                this.snapshots = [];
-
-                /**
-                 * Current snapshot history index.
-                 */
-                this.index = -1;
-
-                this.limit = editor.config.undoStackSize;
-
-                /**
-                 * Remember last pressed key.
-                 */
-                this.lastKeystroke = 0;
+                // Reset the undo stack.
+                this.reset();
         }
 
         UndoManager.prototype =
@@ -288 +284 @@
                         this.typing = true;
                 },
 
+                reset : function()      // Reset the undo stack.
+                {
+                        /**
+                         * Remember last pressed key.
+                         */
+                        this.lastKeystroke = 0;
+
+                        this.modifiersCount = 0;
+
+                        this.typesCount = 0;
+
+                        /**
+                         * Stack for all the undo and redo snapshots, they're always created/removed
+                         * in consistency.
+                         */
+                        this.snapshots = [];
+
+                        /**
+                         * Current snapshot history index.
+                         */
+                        this.index = -1;
+
+                        this.limit = this.editor.config.undoStackSize;
+
+                        this.currentImage = null;
+                },
+
                 /**
                  * Reset all states about typing.
                  * @see  UndoManager.type