You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
115 lines
3.3 KiB
Plaintext
115 lines
3.3 KiB
Plaintext
11 months ago
|
"use strict";
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright [2014] [Diagramo]
|
||
|
|
|
||
|
|
Licensed 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* An facade to add Commands, undo and redo them.
|
||
|
|
* It keeps a STACK of commands and can trigger undo actions in the system.
|
||
|
|
* @this {History}
|
||
|
|
* @constructor
|
||
|
|
* @author Zack Newsham zack_newsham@yahoo.co.uk
|
||
|
|
* @author Alex <alex@scriptoid.com>
|
||
|
|
*
|
||
|
|
* Interesting implementation in Java
|
||
|
|
* @see http://download.oracle.com/javase/6/docs/api/javax/swing/undo/UndoManager.html
|
||
|
|
*/
|
||
|
|
function History(){
|
||
|
|
}
|
||
|
|
|
||
|
|
/**Object is a figure*/
|
||
|
|
History.OBJECT_FIGURE = 0;
|
||
|
|
|
||
|
|
/**Object is a connector*/
|
||
|
|
History.OBJECT_CONNECTOR = 1;
|
||
|
|
|
||
|
|
/**Object is a connection point*/
|
||
|
|
History.OBJECT_CONNECTION_POINT = 2;
|
||
|
|
|
||
|
|
/**Object is a generic object*/
|
||
|
|
History.OBJECT_STATIC = 3;
|
||
|
|
|
||
|
|
/**Object is a group
|
||
|
|
*@deprecated
|
||
|
|
**/
|
||
|
|
History.OBJECT_GROUP = 4;
|
||
|
|
|
||
|
|
/**Object is a glue*/
|
||
|
|
History.OBJECT_GLUE = 5;
|
||
|
|
|
||
|
|
/**Where the {Array} or commands is stored*/
|
||
|
|
History.COMMANDS = [];
|
||
|
|
|
||
|
|
/**The current command inde within the vector of undoable objects. At that position there will be a Command*/
|
||
|
|
History.CURRENT_POINTER = -1;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* Add an action to the STACK of undoable actions.
|
||
|
|
* We position at current pointer, remove everything after it and then add the new
|
||
|
|
* action
|
||
|
|
* @param {Command} command - the command History must store
|
||
|
|
*/
|
||
|
|
History.addUndo = function(command){
|
||
|
|
if(doUndo){
|
||
|
|
/**As we are now positioned on CURRENT_POINTER(where current Command is stored) we will
|
||
|
|
*delete anything after it, add new Command and increase CURRENT_POINTER
|
||
|
|
**/
|
||
|
|
|
||
|
|
//remove commands after current command
|
||
|
|
History.COMMANDS.splice(History.CURRENT_POINTER +1, History.COMMANDS.length);
|
||
|
|
|
||
|
|
//add new command
|
||
|
|
History.COMMANDS.push(command);
|
||
|
|
|
||
|
|
//increase the current pointer
|
||
|
|
History.CURRENT_POINTER++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**Undo current command
|
||
|
|
*TODO: nice to compress/merge some actions like many Translate in a row
|
||
|
|
**/
|
||
|
|
History.undo = function(){
|
||
|
|
if(History.CURRENT_POINTER >= 0){
|
||
|
|
Log.info('undo()->Type of action: ' + History.COMMANDS[History.CURRENT_POINTER].oType);
|
||
|
|
History.COMMANDS[History.CURRENT_POINTER].undo();
|
||
|
|
|
||
|
|
History.CURRENT_POINTER --;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**Redo a command
|
||
|
|
*TODO: nice to compress/merge some actions like many Translate in a row
|
||
|
|
**/
|
||
|
|
History.redo = function(){
|
||
|
|
if(History.CURRENT_POINTER + 1 < History.COMMANDS.length){
|
||
|
|
Log.info('redo()->Type of action: ' + History.COMMANDS[History.CURRENT_POINTER+1].oType);
|
||
|
|
History.COMMANDS[History.CURRENT_POINTER + 1].execute();
|
||
|
|
|
||
|
|
History.CURRENT_POINTER++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**Pack identical commands into a single, equivalend command.
|
||
|
|
*It will pack only consecutive and same type commands (until a TurningPointCommand is founded)
|
||
|
|
**/
|
||
|
|
History.pack = function(){
|
||
|
|
//TODO: implement
|
||
|
|
}
|
||
|
|
|
||
|
|
|