| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // 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.edit.SelectionState; |
| import flashx.textLayout.tlf_internal; |
| |
| use namespace tlf_internal; |
| |
| // |
| // Considered several ways of doing undo/redo |
| // 1 - object model level - stashing copies of all changed objects in the model and restoring them |
| // 2 - cookies - saving an audit trail of every modified property of the model objects |
| // 3 - operations - each operation creates an object that knows how to do/undo/redo itself |
| // going with # 3 for now |
| // |
| import flashx.textLayout.elements.TextFlow; |
| import flashx.textLayout.tlf_internal; |
| |
| /** |
| * The FlowTextOperation is the base class for operations that transform a range of text. |
| * |
| * @see flashx.textLayout.edit.EditManager |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public class FlowTextOperation extends FlowOperation |
| { |
| private var _originalSelectionState:SelectionState; |
| private var _absoluteStart:int; |
| private var _absoluteEnd:int; |
| |
| /** |
| * Creates the FlowTextOperation object. |
| * |
| * @param operationState Specifies the relevant selection. If relevant to the operation, the |
| * <code>operationState</code> describes the text range to which this operation applies. |
| * Otherwise, <code>operationState</code> is used to save the current selection state so that |
| * it can be restored when the operation is undone. |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public function FlowTextOperation(operationState:SelectionState) |
| { |
| super(operationState.textFlow); |
| _absoluteStart = operationState.absoluteStart; |
| _absoluteEnd = operationState.absoluteEnd; |
| _originalSelectionState = operationState; |
| } |
| |
| /** |
| * The absolute start point of the range of text to which this operation is applied. |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public function get absoluteStart():int |
| { return _absoluteStart; } |
| public function set absoluteStart(value:int):void |
| { _absoluteStart = value; } |
| |
| /** |
| * The absolute end point of the range of text to which this operation is applied. |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public function get absoluteEnd():int |
| { return _absoluteEnd; } |
| public function set absoluteEnd(value:int):void |
| { _absoluteEnd = value; } |
| |
| /** |
| * The selection state at the start of the operation. |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| public function get originalSelectionState():SelectionState |
| { |
| return _originalSelectionState; |
| } |
| public function set originalSelectionState(value:SelectionState):void |
| { |
| _originalSelectionState = value; |
| } |
| |
| /** |
| * @inheritDoc |
| * |
| * @playerversion Flash 10 |
| * @playerversion AIR 1.5 |
| * @langversion 3.0 |
| */ |
| override public function redo():SelectionState |
| { |
| doOperation(); |
| return _originalSelectionState; |
| } |
| |
| } |
| } |