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## TinyMCE_UndoRedo.class.js

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Class Summary
TinyMCE_UndoRedo |

    /**
     * $RCSfile: overview-summary-TinyMCE_UndoRedo.class.js.html,v $
     * $Revision: 1.42 $
     * $Date: 2006/04/14 20:00:31 $
     *
     * @author Moxiecode
     * @copyright Copyright © 2004-2006, Moxiecode Systems AB, All rights reserved.
     */

    /**
     * Constructs a undo redo instance, this instance handles the custom undo/redo handeling in TinyMCE.
     *
     * @param {TinyMCE_Control} inst TinyMCE editor control instance.
     * @constructor
     */
    function TinyMCE_UndoRedo(inst) {
    	this.instance = inst;
    	this.undoLevels = new Array();
    	this.undoIndex = 0;
    	this.typingUndoIndex = -1;
    	this.undoRedo = true;
    };

    TinyMCE_UndoRedo.prototype = {
    	/**
    	 * Adds a new undo level, this will take a snapshot of the current instance HTML or use the specified level.
    	 *
    	 * @param {TinyMCE_UndoRedoLevel} l Optional undo/redo level to add.
    	 * @return true/false on success or failure.
    	 * @type boolean
    	 */
    	add : function(l) {
    		var b;

    		if (l) {
    			this.undoLevels[this.undoLevels.length] = l;
    			return true;
    		}

    		var inst = this.instance;

    		if (this.typingUndoIndex != -1) {
    			this.undoIndex = this.typingUndoIndex;
    			// tinyMCE.debug("Override: " + this.undoIndex);
    		}

    		var newHTML = tinyMCE.trim(inst.getBody().innerHTML);
    		if (this.undoLevels[this.undoIndex] && newHTML != this.undoLevels[this.undoIndex].content) {
    			//tinyMCE.debug(newHTML, this.undoLevels[this.undoIndex]);

    			tinyMCE.dispatchCallback(inst, 'onchange_callback', 'onChange', inst);

    			// Time to compress
    			var customUndoLevels = tinyMCE.settings['custom_undo_redo_levels'];
    			if (customUndoLevels != -1 && this.undoLevels.length > customUndoLevels) {
    				for (var i=0; i<this.undoLevels.length-1; i++) {
    					//tinyMCE.debug(this.undoLevels[i] + "=" + this.undoLevels[i+1]);
    					this.undoLevels[i] = this.undoLevels[i+1];
    				}

    				this.undoLevels.length--;
    				this.undoIndex--;
    			}

    			b = inst.undoBookmark;
    			if (!b)
    				b = inst.selection.getBookmark();

    			this.undoIndex++;
    			this.undoLevels[this.undoIndex] = {
    				content : newHTML,
    				bookmark : b
    			};

    			this.undoLevels.length = this.undoIndex + 1;

    			//tinyMCE.debug("level added" + this.undoIndex);
    			return true;

    			// tinyMCE.debug(this.undoIndex + "," + (this.undoLevels.length-1));
    		}

    		return false;
    	},

    	/**
    	 * Performes a undo action, this will restore the HTML contents of the editor to a former state.
    	 */
    	undo : function() {
    		var inst = this.instance;

    		// Do undo
    		if (this.undoIndex > 0) {
    			this.undoIndex--;
    			tinyMCE.setInnerHTML(inst.getBody(), this.undoLevels[this.undoIndex].content);
    			inst.repaint();
    			if (inst.settings.custom_undo_redo_restore_selection)
    				inst.selection.moveToBookmark(this.undoLevels[this.undoIndex].bookmark);
    		}

    		// tinyMCE.debug("Undo - undo levels:" + this.undoLevels.length + ", undo index: " + this.undoIndex);
    	},

    	/**
    	 * Performes a undo action, this will restore the HTML contents of the editor to a former undoed state.
    	 */
    	redo : function() {
    		var inst = this.instance;

    		tinyMCE.execCommand("mceEndTyping");

    		if (this.undoIndex < (this.undoLevels.length-1)) {
    			this.undoIndex++;
    			tinyMCE.setInnerHTML(inst.getBody(), this.undoLevels[this.undoIndex].content);
    			inst.repaint();
    //					if (this.undoIndex > 0)
    //						inst.selection.moveToBookmark(this.undoLevels[this.undoIndex-1].bookmark);
    			if (inst.settings.custom_undo_redo_restore_selection)
    				inst.selection.moveToBookmark(this.undoLevels[this.undoIndex].bookmark);
    			// tinyMCE.debug("Redo - undo levels:" + this.undoLevels.length + ", undo index: " + this.undoIndex);
    		}

    		tinyMCE.triggerNodeChange();
    	}
    };

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Documentation generated by JSDoc on Fri Apr 14 21:59:23 2006