/*

YUI 3.10.3 (build 2fb5187)

Copyright 2013 Yahoo! Inc. All rights reserved.

Licensed under the BSD License.

http://yuilibrary.com/license/

*/

YUI.add('widget-htmlparser', function (Y, NAME) {

/**

 * Adds HTML Parser support to the base Widget class

 *

 * @module widget

 * @submodule widget-htmlparser

 * @for Widget

 */

var Widget = Y.Widget,

    Node = Y.Node,

    Lang = Y.Lang,

    SRC_NODE = "srcNode",

    CONTENT_BOX = "contentBox";

/**

 * Object hash, defining how attribute values are to be parsed from

 * markup contained in the widget's content box. e.g.:

 * <pre>

 *   {

 *       // Set single Node references using selector syntax

 *       // (selector is run through node.one)

 *       titleNode: "span.yui-title",

 *       // Set NodeList references using selector syntax

 *       // (array indicates selector is to be run through node.all)

 *       listNodes: ["li.yui-item"],

 *       // Set other attribute types, using a parse function.

 *       // Context is set to the widget instance.

 *       label: function(contentBox) {

 *           return contentBox.one("span.title").get("innerHTML");

 *       }

 *   }

 * </pre>

 *

 * @property HTML_PARSER

 * @type Object

 * @static

 */

Widget.HTML_PARSER = {};

/**

 * The build configuration for the Widget class.

 * <p>

 * Defines the static fields which need to be aggregated,

 * when this class is used as the main class passed to

 * the <a href="Base.html#method_build">Base.build</a> method.

 * </p>

 * @property _buildCfg

 * @type Object

 * @static

 * @final

 * @private

 */

Widget._buildCfg = {

    aggregates : ["HTML_PARSER"]

};

/**

 * The DOM node to parse for configuration values, passed to the Widget's HTML_PARSER definition

 *

 * @attribute srcNode

 * @type String | Node

 * @writeOnce

 */

Widget.ATTRS[SRC_NODE] = {

    value: null,

    setter: Node.one,

    getter: "_getSrcNode",

    writeOnce: true

};

Y.mix(Widget.prototype, {

    /**

     * @method _getSrcNode

     * @protected

     * @return {Node} The Node to apply HTML_PARSER to

     */

    _getSrcNode : function(val) {

        return val || this.get(CONTENT_BOX);

    },

    /**

     * @method _applyParsedConfig

     * @protected

     * @return {Object} The merged configuration literal

     */

    _applyParsedConfig : function(node, cfg, parsedCfg) {

        return (parsedCfg) ? Y.mix(cfg, parsedCfg, false) : cfg;

    },

    /**

     * Utility method used to apply the <code>HTML_PARSER</code> configuration for the

     * instance, to retrieve config data values.

     *

     * @method _applyParser

     * @protected

     * @param config {Object} User configuration object (will be populated with values from Node)

     */

    _applyParser : function(config) {

        var widget = this,

            srcNode = this._getNodeToParse(),

            schema = widget._getHtmlParser(),

            parsedConfig,

            val;

        if (schema && srcNode) {

            Y.Object.each(schema, function(v, k, o) {

                val = null;

                if (Lang.isFunction(v)) {

                    val = v.call(widget, srcNode);

                } else {

                    if (Lang.isArray(v)) {

                        val = srcNode.all(v[0]);

                        if (val.isEmpty()) {

                            val = null;

                        }

                    } else {

                        val = srcNode.one(v);

                    }

                }

                if (val !== null && val !== undefined) {

                    parsedConfig = parsedConfig || {};

                    parsedConfig[k] = val;

                }

            });

        }

        config = widget._applyParsedConfig(srcNode, config, parsedConfig);

    },

    /**

     * Determines whether we have a node reference which we should try and parse.

     *

     * The current implementation does not parse nodes generated from CONTENT_TEMPLATE,

     * only explicitly set srcNode, or contentBox attributes.

     *

     * @method _getNodeToParse

     * @return {Node} The node reference to apply HTML_PARSER to.

     * @private

     */

    _getNodeToParse : function() {

        var srcNode = this.get("srcNode");

        return (!this._cbFromTemplate) ? srcNode : null;

    },

    /**

     * Gets the HTML_PARSER definition for this instance, by merging HTML_PARSER

     * definitions across the class hierarchy.

     *

     * @private

     * @method _getHtmlParser

     * @return {Object} HTML_PARSER definition for this instance

     */

    _getHtmlParser : function() {

        // Removed caching for kweight. This is a private method

        // and only called once so don't need to cache HTML_PARSER

        var classes = this._getClasses(),

            parser = {},

            i, p;

        for (i = classes.length - 1; i >= 0; i--) {

            p = classes[i].HTML_PARSER;

            if (p) {

                Y.mix(parser, p, true);

            }

        }

        return parser;

    }

});

}, '3.10.3', {"requires": ["widget-base"]});