/**

 * 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() {

	function findParentLayer(node) {

		do {

			if (node.className && node.className.indexOf('mceItemLayer') != -1) {

				return node;

			}

		} while (node = node.parentNode);

	};



	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() {

				var dom = ed.dom;



				if (tinymce.isIE)

					ed.getDoc().execCommand('2D-Position', false, true);

			});



			// Remove serialized styles when selecting a layer since it might be changed by a drag operation

			ed.onMouseUp.add(function(ed, e) {

				var layer = findParentLayer(e.target);

	

				if (layer) {

					ed.dom.setAttrib(layer, 'data-mce-style', '');

				}

			});



			// Fixes edit focus issues with layers on Gecko

			// This will enable designMode while inside a layer and disable it when outside

			ed.onMouseDown.add(function(ed, e) {

				var node = e.target, doc = ed.getDoc(), parent;



				if (tinymce.isGecko) {

					if (findParentLayer(node)) {

						if (doc.designMode !== 'on') {

							doc.designMode = 'on';



							// Repaint caret

							node = doc.body;

							parent = node.parentNode;

							parent.removeChild(node);

							parent.appendChild(node);

						}

					} else if (doc.designMode == 'on') {

						doc.designMode = 'off';

					}

				}

			});



			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|fixed)$/i.test(e.style.position)) {

					if (s)

						dom.addClass(e, 'mceItemVisualAid');

					else

						dom.removeClass(e, 'mceItemVisualAid');



					dom.addClass(e, 'mceItemLayer');

				}

			});

		},



		_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, dom = ed.dom, p = dom.getPos(dom.getParent(ed.selection.getNode(), '*')), body = ed.getBody();



			ed.dom.add(body, 'div', {

				style : {

					position : 'absolute',

					left : p.x,

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

					width : 100,

					height : 100

				},

				'class' : 'mceItemVisualAid mceItemLayer'

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



			// Workaround for IE where it messes up the JS engine if you insert a layer on IE 6,7

			if (tinymce.isIE)

				dom.setHTML(body, body.innerHTML);

		},



		_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, 'mceItemVisualAid');

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

				} 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.dom.setAttrib(le, 'data-mce-style', '');

					ed.addVisual(ed.getBody());

				}



				ed.execCommand('mceRepaint');

				ed.nodeChanged();

			}

		}

	});



	// Register plugin

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

})();