mxgraph/javascript/dist/js/io/mxDefaultKeyHandlerCodec.js

mxGraph is a fully client side JavaScript diagramming library that uses SVG and HTML for rendering.

/**
 * Copyright (c) 2006-2015, JGraph Ltd
 * Copyright (c) 2006-2015, Gaudenz Alder
 */
mxCodecRegistry.register(function()
{
	/**
	 * Class: mxDefaultKeyHandlerCodec
	 *
	 * Custom codec for configuring <mxDefaultKeyHandler>s. This class is created
	 * and registered dynamically at load time and used implicitly via
	 * <mxCodec> and the <mxCodecRegistry>. This codec only reads configuration
	 * data for existing key handlers, it does not encode or create key handlers.
	 */
	var codec = new mxObjectCodec(new mxDefaultKeyHandler());

	/**
	 * Function: encode
	 *
	 * Returns null.
	 */
	codec.encode = function(enc, obj)
	{
		return null;
	};
	
	/**
	 * Function: decode
	 *
	 * Reads a sequence of the following child nodes
	 * and attributes:
	 *
	 * Child Nodes:
	 *
	 * add - Binds a keystroke to an actionname.
	 *
	 * Attributes:
	 *
	 * as - Keycode.
	 * action - Actionname to execute in editor.
	 * control - Optional boolean indicating if
	 * 		the control key must be pressed.
	 *
	 * Example:
	 *
	 * (code)
	 * <mxDefaultKeyHandler as="keyHandler">
	 *   <add as="88" control="true" action="cut"/>
	 *   <add as="67" control="true" action="copy"/>
	 *   <add as="86" control="true" action="paste"/>
	 * </mxDefaultKeyHandler>
	 * (end)
	 *
	 * The keycodes are for the x, c and v keys.
	 *
	 * See also: <mxDefaultKeyHandler.bindAction>,
	 * http://www.js-examples.com/page/tutorials__key_codes.html
	 */
	codec.decode = function(dec, node, into)
	{
		if (into != null)
		{
			var editor = into.editor;
			node = node.firstChild;
			
			while (node != null)
			{
				if (!this.processInclude(dec, node, into) &&
					node.nodeName == 'add')
				{
					var as = node.getAttribute('as');
					var action = node.getAttribute('action');
					var control = node.getAttribute('control');
					
					into.bindAction(as, action, control);
				}
				
				node = node.nextSibling;
			}
		}
		
		return into;
	};

	// Returns the codec into the registry
	return codec;

}());

__mxOutput.mxDefaultKeyHandlerCodec = typeof mxDefaultKeyHandlerCodec !== 'undefined' ? mxDefaultKeyHandlerCodec : undefined;