Actualización

plugin/mindmap/edit-mindmap/vendor/js/commandstack.js

@@ -0,0 +1,124 @@
+kampfer.require('mindMap.command');
+
+kampfer.provide('mindMap.command.stack');
+kampfer.provide('mindMap.command.Redo');
+kampfer.provide('mindMap.command.Undo');
+
+kampfer.mindMap.command.stack = {
+    _queue : [],
+
+    // <index 是execute过的命令
+    // >=index 是被unExecute过的命令
+    _index : 0,
+
+    _maxLength : 50,
+
+    push : function(command) {
+        if(this._queue.length >= this._maxLength) {
+            this._queue.shift().dispose();
+            this._index--;
+        }
+        //this._queue.push(command);
+        //this._index++;
+        this._queue.splice(this._index++, 0, command);
+    },
+
+    stepForward : function() {
+        if( !this.atEnd() ) {
+            return this._queue[this._index++];
+        }
+    },
+
+    stepBackward : function() {
+        if( !this.atStart() ) {
+            this._index--;
+            return this._queue[this._index];
+        }
+    },
+
+    atEnd : function() {
+        if(this._index === this._queue.length) {
+            return true;
+        }
+        return false;
+    },
+
+    atStart : function() {
+        if(this._index === 0) {
+            return true;
+        }
+        return false;
+    },
+
+    get : function(index) {
+        if(index > 0 && index <= this._queue.length) {
+            return this._queue[index];
+        }
+     },
+
+    getStackLength : function() {
+        return this._queue.length;
+    },
+
+    getStackIndex : function() {
+        return this._index;
+    },
+
+    isEmpty : function() {
+        return this._queue.length === 0;
+    }
+};
+
+
+kampfer.mindMap.command.Undo = kampfer.mindMap.command.Base.extend({
+    execute : function(level) {
+        var kmcs = kampfer.mindMap.command.stack;
+        level = level || this.level;
+
+        for(var i = 0; i < this.level; i++) {
+            var command = kmcs.stepBackward();
+            if(command) {
+                command.unExecute();
+            }
+        }
+    },
+
+    level : 1
+});
+
+kampfer.mindMap.command.Undo.isAvailable = function() {
+    if( kampfer.mindMap.command.stack.isEmpty() ||
+        kampfer.mindMap.command.stack.atStart() ) {
+        return false;
+    }
+    return true;
+};
+
+kampfer.mindMap.command.Undo.shortcut = 'ctrl+z';
+
+
+kampfer.mindMap.command.Redo = kampfer.mindMap.command.Base.extend({
+    execute : function(level) {
+        var kmcs = kampfer.mindMap.command.stack;
+        level = level || this.level;
+
+        for(var i = 0; i < this.level; i++) {
+            var command = kmcs.stepForward();
+            if(command) {
+                command.execute();
+            }
+        }
+    },
+
+    level : 1
+});
+
+kampfer.mindMap.command.Redo.isAvailable = function() {
+    if( kampfer.mindMap.command.stack.isEmpty() ||
+        kampfer.mindMap.command.stack.atEnd() ) {
+        return false;
+    }
+    return true;
+};
+
+kampfer.mindMap.command.Redo.shortcut = 'ctrl+y';