/**
 * EGroupware eTemplate2 - JS widget class with value attribute and auto loading
 *
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package etemplate
 * @subpackage api
 * @link http://www.egroupware.org
 * @author Andreas Stöckel
 * @copyright Stylite 2011
 * @version $Id$
 */

"use strict";

/*egw:uses
	jquery.jquery;
	et2_core_baseWidget;
*/

/**
 * et2_valueWidget is the base class for et2_inputWidget - valueWidget introduces
 * the "value" attribute and automatically loads it from the "content" array
 * after loading from XML.
 * 
 * @augments et2_baseWidget
 */
var et2_valueWidget = et2_baseWidget.extend(
{
	attributes: {
		"label": {
			"name": "Label",
			"default": "",
			"type": "string",
			"description": "The label is displayed by default in front (for radiobuttons behind) each widget (if not empty). If you want to specify a different position, use a '%s' in the label, which gets replaced by the widget itself. Eg. '%s Name' to have the label Name behind a checkbox. The label can contain variables, as descript for name. If the label starts with a '@' it is replaced by the value of the content-array at this index (with the '@'-removed and after expanding the variables).",
			"translate": true
		},
		"value": {
			"name": "Value",
			"description": "The value of the widget",
			"type": "string",
			"default": et2_no_init
		}
	},

	/**
	 * 
	 * 
	 * @memberOf et2_valueWidget
	 * @param _attrs
	 */
	transformAttributes: function(_attrs) {
		this._super.apply(this, arguments);

		if (this.id)
		{
			// Set the value for this element
			var contentMgr = this.getArrayMgr("content");
			if (contentMgr != null) {
				var val = contentMgr.getEntry(this.id);
				if (val !== null)
				{
					_attrs["value"] = val;
				}
			}
			// Check for already inside namespace
			if(this.createNamespace && this.getArrayMgr("content").perspectiveData.owner == this)
			{
				_attrs["value"] = this.getArrayMgr("content").data;
			}

		}
	},

	set_label: function(_value) {
		// Abort if ther was no change in the label
		if (_value == this.label)
		{
			return;
		}

		if (_value)
		{
			// Create the label container if it didn't exist yet
			if (this._labelContainer == null)
			{
				this._labelContainer = $j(document.createElement("label"))
					.addClass("et2_label");
				this.getSurroundings().insertDOMNode(this._labelContainer[0]);
			}

			// Clear the label container.
			this._labelContainer.empty();

			// Create the placeholder element and set it
			var ph = document.createElement("span");
			this.getSurroundings().setWidgetPlaceholder(ph);

			// Split the label at the "%s"
			var parts = et2_csvSplit(_value, 2, "%s");

			// Update the content of the label container
			for (var i = 0; i < parts.length; i++)
			{
				if (parts[i])
				{
					this._labelContainer.append(document.createTextNode(parts[i]));
				}
				if (i == 0)
				{
					this._labelContainer.append(ph);
				}
			}
		}
		else
		{
			// Delete the labelContainer from the surroundings object
			if (this._labelContainer)
			{
				this.getSurroundings().removeDOMNode(this._labelContainer[0]);
			}
			this._labelContainer = null;
		}

		// Update the surroundings in order to reflect the change in the label
		this.getSurroundings().update();

		// Copy the given value
		this.label = _value;
	}
});