/**

 *

 * @author Moxiecode

 * @copyright Copyright © 2004-2008, Moxiecode Systems AB, All rights reserved.

 */

(function() {

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

		init : function(ed, url) {

			var t = this;

			t.editor = ed;

			// Register commands

			ed.addCommand('mceInsertLayer', t._insertLayer, t);

			ed.addCommand('mceMoveForward', function() {

				t._move(1);

			});

			ed.addCommand('mceMoveBackward', function() {

				t._move(-1);

			});

			ed.addCommand('mceMakeAbsolute', function() {

				t._toggleAbsolute();

			});

			// Register buttons

			ed.addButton('moveforward', {title : 'layer.forward_desc', cmd : 'mceMoveForward'});

			ed.addButton('movebackward', {title : 'layer.backward_desc', cmd : 'mceMoveBackward'});

			ed.addButton('absolute', {title : 'layer.absolute_desc', cmd : 'mceMakeAbsolute'});

			ed.addButton('insertlayer', {title : 'layer.insertlayer_desc', cmd : 'mceInsertLayer'});

			ed.onInit.add(function() {

				if (tinymce.isIE)

			});

			ed.onNodeChange.add(t._nodeChange, t);

			ed.onVisualAid.add(t._visualAid, t);

		},

		getInfo : function() {

			return {

				longname : 'Layer',

				author : 'Moxiecode Systems AB',

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

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

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

			};

		},

		// Private methods

		_nodeChange : function(ed, cm, n) {

			var le, p;

			le = this._getParentLayer(n);

			p = ed.dom.getParent(n, 'DIV,P,IMG');

			if (!p) {

				cm.setDisabled('absolute', 1);

				cm.setDisabled('moveforward', 1);

				cm.setDisabled('movebackward', 1);

			} else {

				cm.setDisabled('absolute', 0);

				cm.setDisabled('moveforward', !le);

				cm.setDisabled('movebackward', !le);

				cm.setActive('absolute', le && le.style.position.toLowerCase() == "absolute");

			}

		},

		// Private methods

		_visualAid : function(ed, e, s) {

			var dom = ed.dom;

			tinymce.each(dom.select('div,p', e), function(e) {

				if (/^(absolute|relative|static)$/i.test(e.style.position)) {

					if (s)

						dom.addClass(e, 'mceVisualAid');

					else

						dom.removeClass(e, 'mceVisualAid');	

				}

			});

		},

		_move : function(d) {

			var ed = this.editor, i, z = [], le = this._getParentLayer(ed.selection.getNode()), ci = -1, fi = -1, nl;

			nl = [];

			tinymce.walk(ed.getBody(), function(n) {

				if (n.nodeType == 1 && /^(absolute|relative|static)$/i.test(n.style.position))

					nl.push(n); 

			}, 'childNodes');

			// Find z-indexes

			for (i=0; i<nl.length; i++) {

				z[i] = nl[i].style.zIndex ? parseInt(nl[i].style.zIndex) : 0;

				if (ci < 0 && nl[i] == le)

					ci = i;

			}

			if (d < 0) {

				// Move back

				// Try find a lower one

				for (i=0; i<z.length; i++) {

					if (z[i] < z[ci]) {

						fi = i;

						break;

					}

				}

				if (fi > -1) {

					nl[ci].style.zIndex = z[fi];

					nl[fi].style.zIndex = z[ci];

				} else {

					if (z[ci] > 0)

						nl[ci].style.zIndex = z[ci] - 1;

				}

			} else {

				// Move forward

				// Try find a higher one

				for (i=0; i<z.length; i++) {

					if (z[i] > z[ci]) {

						fi = i;

						break;

					}

				}

				if (fi > -1) {

					nl[ci].style.zIndex = z[fi];

					nl[fi].style.zIndex = z[ci];

				} else

					nl[ci].style.zIndex = z[ci] + 1;

			}

			ed.execCommand('mceRepaint');

		},

		_getParentLayer : function(n) {

			return this.editor.dom.getParent(n, function(n) {

				return n.nodeType == 1 && /^(absolute|relative|static)$/i.test(n.style.position);

			});

		},

		_insertLayer : function() {

			var ed = this.editor, p = ed.dom.getPos(ed.dom.getParent(ed.selection.getNode(), '*'));

			ed.dom.add(ed.getBody(), 'div', {

				style : {

					position : 'absolute',

					left : p.x,

					top : (p.y > 20 ? p.y : 20),

					width : 100,

					height : 100

				},

				'class' : 'mceVisualAid'

			}, ed.selection.getContent() || ed.getLang('layer.content'));

		},

		_toggleAbsolute : function() {

			var ed = this.editor, le = this._getParentLayer(ed.selection.getNode());

			if (!le)

				le = ed.dom.getParent(ed.selection.getNode(), 'DIV,P,IMG');

			if (le) {

				if (le.style.position.toLowerCase() == "absolute") {

					ed.dom.setStyles(le, {

						position : '',

						left : '',

						top : '',

						width : '',

						height : ''

					});

					ed.dom.removeClass(le, 'mceVisualAid');

				} else {

					if (le.style.left == "")

						le.style.left = 20 + 'px';

					if (le.style.top == "")

						le.style.top = 20 + 'px';

					if (le.style.width == "")

						le.style.width = le.width ? (le.width + 'px') : '100px';

					if (le.style.height == "")

						le.style.height = le.height ? (le.height + 'px') : '100px';

					le.style.position = "absolute";

					ed.addVisual(ed.getBody());

				}

				ed.execCommand('mceRepaint');

				ed.nodeChanged();

			}

		}

	});

	// Register plugin

	tinymce.PluginManager.add('layer', tinymce.plugins.Layer);

})();