| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| package flashx.textLayout.operations |
| { |
| import flashx.textLayout.debug.assert; |
| import flashx.textLayout.edit.SelectionState; |
| import flashx.textLayout.elements.ContainerFormattedElement; |
| import flashx.textLayout.elements.FlowElement; |
| import flashx.textLayout.elements.FlowGroupElement; |
| import flashx.textLayout.elements.ParagraphFormattedElement; |
| import flashx.textLayout.elements.TextFlow; |
| import flashx.textLayout.formats.Category; |
| import flashx.textLayout.formats.ITextLayoutFormat; |
| import flashx.textLayout.formats.TextLayoutFormat; |
| import flashx.textLayout.property.Property; |
| import flashx.textLayout.tlf_internal; |
| |
| use namespace tlf_internal; |
| |
| /** |
| * The ClearFormatOnElementOperation class encapsulates a style change to an element. |
| * |
| * <p>This operation undefines one or more formats to a flow element.</p> |
| * |
| * @see flashx.textLayout.edit.EditManager |
| * @see flashx.textLayout.formats.TextLayoutFormat |
| * @see flashx.textLayout.events.FlowOperationEvent |
| |
| * @see ApplyFormatToElementOperation |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public class ClearFormatOnElementOperation extends FlowElementOperation |
| { |
| private var _format:ITextLayoutFormat; |
| |
| private var _undoStyles:TextLayoutFormat; |
| |
| /** |
| * Creates an ClearFormatOnElementOperation object. |
| * |
| * @param operationState Specifies the text flow containing the element to which this operation is applied. |
| * @param targetElement specifies the element to which this operation is applied. |
| * @param format The formats to apply in this operation. |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public function ClearFormatOnElementOperation(operationState:SelectionState, targetElement:FlowElement, format:ITextLayoutFormat, relativeStart:int = 0, relativeEnd:int = -1) |
| { |
| super(operationState,targetElement,relativeStart,relativeEnd); |
| |
| // split up the properties by category |
| _format = format; |
| } |
| |
| /** |
| * The character formats applied in this operation. |
| * |
| * <p>If <code>null</code> no character formats are changed.</p> |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public function get format():ITextLayoutFormat |
| { |
| return _format; |
| } |
| public function set format(value:ITextLayoutFormat):void |
| { |
| _format = value; |
| } |
| |
| /** @private */ |
| public override function doOperation():Boolean |
| { |
| var targetElement:FlowElement = getTargetElement(); |
| |
| adjustForDoOperation(targetElement); |
| |
| _undoStyles = new TextLayoutFormat(targetElement.format); |
| |
| if (_format) |
| { |
| var newFormat:TextLayoutFormat = new TextLayoutFormat(targetElement.format); |
| // this is fairly rare so this operation is not optimizied |
| for (var prop:String in TextLayoutFormat.description) |
| { |
| if (_format[prop] !== undefined) |
| newFormat[prop] = undefined; |
| } |
| targetElement.format = newFormat; |
| } |
| |
| return true; |
| } |
| |
| /** @private */ |
| public override function undo():SelectionState |
| { |
| var targetElement:FlowElement = getTargetElement(); |
| |
| targetElement.format = new TextLayoutFormat(_undoStyles); |
| |
| adjustForUndoOperation(targetElement); |
| |
| return originalSelectionState; |
| } |
| } |
| } |