/**
 * EGroupware eTemplate2 - JS Description object
 *
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package etemplate
 * @subpackage api
 * @link http://www.egroupware.org
 * @author Nathan Gray
 * @copyright Nathan Gray 2011
 * @version $Id$
 */

"use strict";

/*egw:uses
	jquery.jquery;
	et2_core_interfaces;
	et2_core_baseWidget;
*/

/**
 * Class which implements the "image" XET-Tag
 *
 * @augments et2_baseWidget
 */
var et2_image = et2_baseWidget.extend([et2_IDetachedDOM],
{
	attributes: {
		"src": {
			"name": "Image",
			"type": "string",
			"description": "Displayed image"
		},
		default_src: {
			name: "Default image",
			type: "string",
			description: "Image to use if src is not found"
		},
		"href": {
			"name": "Link Target",
			"type": "string",
			"description": "Link URL, empty if you don't wan't to display a link.",
			"default": et2_no_init
		},
		"extra_link_target": {
			"name": "Link target",
			"type": "string",
			"default": "_self",
			"description": "Link target descriptor"
		},
		"extra_link_popup": {
			"name": "Popup",
			"type": "string",
			"description": "widthxheight, if popup should be used, eg. 640x480"
		},
		"imagemap":{
			// TODO: Do something with this
			"name": "Image map",
			"description": "Currently not implemented"
		},
		"label": {
			"name": "Label",
			"type": "string",
			"description": "Label for image"
		}
	},
	legacyOptions: ["href", "extra_link_target", "imagemap", "extra_link_popup", "id"],

	/**
	 * Constructor
	 *
	 * @memberOf et2_image
	 */
	init: function() {
		this._super.apply(this, arguments);

		// Create the image or a/image tag
		this.image = $j(document.createElement("img"));
		if (this.options.label)
		{
			this.image.attr("alt", this.options.label).attr("title", this.options.label);
		}
		if (this.options.href)
		{
			this.image.addClass('et2_clickable');
		}
		if(this.options["class"])
		{
			this.image.addClass(this.options["class"]);
		}
		this.setDOMNode(this.image[0]);
	},

	click: function()
	{
		if(this.options.href)
		{
			this.egw().open_link(this.options.href, this.options.extra_link_target, this.options.extra_link_popup);
		}
		else
		{
			this._super.apply(this,arguments);
		}
	},

	transformAttributes: function(_attrs) {
		this._super.apply(arguments);

		// Check to expand name
		if (typeof _attrs["src"] != "undefined")
		{
			var manager = this.getArrayMgr("content");
			if(manager) {
				var src = manager.getEntry(_attrs["src"]);
				if (typeof src != "undefined" && src !== null)
				{
					if(typeof src == "object")
					{
						src = egw().link('/index.php', src);
					}
					_attrs["src"] = src;
				}
			}
		}
	},

	set_label: function(_value) {
		this.options.label = _value;
		_value = this.egw().lang(_value);
		// label is NOT the alt attribute in eTemplate, but the title/tooltip
		this.image.attr("alt", _value).attr("title", _value);
	},

	setValue: function(_value) {
		// Value is src, images don't get IDs
		this.set_src(_value);
	},

	set_href: function (_value)
	{
		if (!this.isInTree())
		{
			return false;
		}

		this.options.href = _value;
		this.image.wrapAll('<a href="'+_value+'"></a>"');

		var href = this.options.href;
		var popup = this.options.extra_link_popup;
		var target = this.options.extra_link_target;
		this.image.parent().click(function(e)
		{
			egw.open_link(href,target,popup);
			e.preventDefault();
			return false;
		});

		return true;
	},

	/**
	 * Set image src
	 *
	 * @param {string} _value image, app/image or url
	 * @return {boolean} true if image was found, false if not (image is either not displayed or default_src is used)
	 */
	set_src: function(_value) {
		if(!this.isInTree())
		{
			return false;
		}

		this.options.src = _value;

		var src = this.egw().image(_value);
		if (src)
		{
			this.image.attr("src", src).show();
			return true;
		}
		// allow url's too
		else if (_value[0] == '/' || _value.substr(0,4) == 'http')
		{
			this.image.attr('src', _value).show();
			return true;
		}
		src = null;
		if (this.options.default_src)
		{
			src = this.egw().image(this.options.default_src);
		}
		if (src)
		{
			this.image.attr("src", src).show();
		}
		else
		{
			this.image.css("display","none");
		}
		return false;
	},

	/**
	 * Implementation of "et2_IDetachedDOM" for fast viewing in gridview
	 *
	 * @param {array} _attrs
	 */
	getDetachedAttributes: function(_attrs) {
		_attrs.push("src", "label", "href");
	},

	getDetachedNodes: function() {
		return [this.image[0]];
	},

	setDetachedAttributes: function(_nodes, _values) {
		// Set the given DOM-Nodes
		this.image = $j(_nodes[0]);

		// Set the attributes
		if (_values["src"])
		{
			this.set_src(_values["src"]);
		}

		if (_values["label"])
		{
			this.set_label(_values["label"]);
		}
		if(_values["href"])
		{
			this.image.addClass('et2_clickable');
			this.set_href(_values["href"]);
		}
	}
});

et2_register_widget(et2_image, ["image"]);