/**

 * editor_plugin_src.js

 *

 * Copyright 2009, Moxiecode Systems AB

 * Released under LGPL License.

 *

 * License: http://tinymce.moxiecode.com/license

 * Contributing: http://tinymce.moxiecode.com/contributing

 */

(function() {

	var DOM = tinymce.DOM, Event = tinymce.dom.Event, each = tinymce.each, explode = tinymce.explode;

	tinymce.create('tinymce.plugins.TabFocusPlugin', {

		init : function(ed, url) {

			function tabCancel(ed, e) {

				if (e.keyCode === 9)

					return Event.cancel(e);

			}

			function tabHandler(ed, e) {

				var x, i, f, el, v;

				function find(d) {

					el = DOM.select(':input:enabled,*[tabindex]');

					function canSelectRecursive(e) {

						return e.nodeName==="BODY" || (e.type != 'hidden' &&

							!(e.style.display == "none") &&

							!(e.style.visibility == "hidden") && canSelectRecursive(e.parentNode));

					}

					function canSelectInOldIe(el) {

						return el.attributes["tabIndex"].specified || el.nodeName == "INPUT" || el.nodeName == "TEXTAREA";

					}

					function isOldIe() {

						return tinymce.isIE6 || tinymce.isIE7;

					}

					function canSelect(el) {

						return ((!isOldIe() || canSelectInOldIe(el))) && el.getAttribute("tabindex") != '-1' && canSelectRecursive(el);

					}

					each(el, function(e, i) {

						if (e.id == ed.id) {

							x = i;

							return false;

						}

					});

					if (d > 0) {

						for (i = x + 1; i < el.length; i++) {

							if (canSelect(el[i]))

								return el[i];

						}

					} else {

						for (i = x - 1; i >= 0; i--) {

							if (canSelect(el[i]))

								return el[i];

						}

					}

					return null;

				}

				if (e.keyCode === 9) {

					v = explode(ed.getParam('tab_focus', ed.getParam('tabfocus_elements', ':prev,:next')));

					if (v.length == 1) {

						v[1] = v[0];

						v[0] = ':prev';

					}

					// Find element to focus

					if (e.shiftKey) {

						if (v[0] == ':prev')

							el = find(-1);

						else

							el = DOM.get(v[0]);

					} else {

						if (v[1] == ':next')

							el = find(1);

						else

							el = DOM.get(v[1]);

					}

					if (el) {

						if (el.id && (ed = tinymce.get(el.id || el.name)))

							ed.focus();

						else

							window.setTimeout(function() {

								if (!tinymce.isWebKit)

									window.focus();

								el.focus();

							}, 10);

						return Event.cancel(e);

					}

				}

			}

			ed.onKeyUp.add(tabCancel);

			if (tinymce.isGecko) {

				ed.onKeyPress.add(tabHandler);

				ed.onKeyDown.add(tabCancel);

			} else

				ed.onKeyDown.add(tabHandler);

		},

		getInfo : function() {

			return {

				longname : 'Tabfocus',

				author : 'Moxiecode Systems AB',

				authorurl : 'http://tinymce.moxiecode.com',

				infourl : 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/tabfocus',

				version : tinymce.majorVersion + "." + tinymce.minorVersion

			};

		}

	});

	// Register plugin

	tinymce.PluginManager.add('tabfocus', tinymce.plugins.TabFocusPlugin);

})();