/*

YUI 3.10.3 (build 2fb5187)

Copyright 2013 Yahoo! Inc. All rights reserved.

Licensed under the BSD License.

http://yuilibrary.com/license/

*/

YUI.add('dom-style', function (Y, NAME) {

(function(Y) {

/** 

 * Add style management functionality to DOM.

 * @module dom

 * @submodule dom-style

 * @for DOM

 */

var DOCUMENT_ELEMENT = 'documentElement',

    DEFAULT_VIEW = 'defaultView',

    OWNER_DOCUMENT = 'ownerDocument',

    STYLE = 'style',

    FLOAT = 'float',

    CSS_FLOAT = 'cssFloat',

    STYLE_FLOAT = 'styleFloat',

    TRANSPARENT = 'transparent',

    GET_COMPUTED_STYLE = 'getComputedStyle',

    GET_BOUNDING_CLIENT_RECT = 'getBoundingClientRect',

    WINDOW = Y.config.win,

    DOCUMENT = Y.config.doc,

    UNDEFINED = undefined,

    Y_DOM = Y.DOM,

    TRANSFORM = 'transform',

    TRANSFORMORIGIN = 'transformOrigin',

    VENDOR_TRANSFORM = [

        'WebkitTransform',

        'MozTransform',

        'OTransform',

        'msTransform'

    ],

    re_color = /color$/i,

    re_unit = /width|height|top|left|right|bottom|margin|padding/i;

Y.Array.each(VENDOR_TRANSFORM, function(val) {

    if (val in DOCUMENT[DOCUMENT_ELEMENT].style) {

        TRANSFORM = val;

        TRANSFORMORIGIN = val + "Origin";

    }

});

Y.mix(Y_DOM, {

    DEFAULT_UNIT: 'px',

    CUSTOM_STYLES: {

    },

    /**

     * Sets a style property for a given element.

     * @method setStyle

     * @param {HTMLElement} An HTMLElement to apply the style to.

     * @param {String} att The style property to set. 

     * @param {String|Number} val The value. 

     */

    setStyle: function(node, att, val, style) {

        style = style || node.style;

        var CUSTOM_STYLES = Y_DOM.CUSTOM_STYLES;

        if (style) {

            if (val === null || val === '') { // normalize unsetting

                val = '';

            } else if (!isNaN(new Number(val)) && re_unit.test(att)) { // number values may need a unit

                val += Y_DOM.DEFAULT_UNIT;

            }

            if (att in CUSTOM_STYLES) {

                if (CUSTOM_STYLES[att].set) {

                    CUSTOM_STYLES[att].set(node, val, style);

                    return; // NOTE: return

                } else if (typeof CUSTOM_STYLES[att] === 'string') {

                    att = CUSTOM_STYLES[att];

                }

            } else if (att === '') { // unset inline styles

                att = 'cssText';

                val = '';

            }

            style[att] = val; 

        }

    },

    /**

     * Returns the current style value for the given property.

     * @method getStyle

     * @param {HTMLElement} An HTMLElement to get the style from.

     * @param {String} att The style property to get. 

     */

    getStyle: function(node, att, style) {

        style = style || node.style;

        var CUSTOM_STYLES = Y_DOM.CUSTOM_STYLES,

            val = '';

        if (style) {

            if (att in CUSTOM_STYLES) {

                if (CUSTOM_STYLES[att].get) {

                    return CUSTOM_STYLES[att].get(node, att, style); // NOTE: return

                } else if (typeof CUSTOM_STYLES[att] === 'string') {

                    att = CUSTOM_STYLES[att];

                }

            }

            val = style[att];

            if (val === '') { // TODO: is empty string sufficient?

                val = Y_DOM[GET_COMPUTED_STYLE](node, att);

            }

        }

        return val;

    },

    /**

     * Sets multiple style properties.

     * @method setStyles

     * @param {HTMLElement} node An HTMLElement to apply the styles to. 

     * @param {Object} hash An object literal of property:value pairs. 

     */

    setStyles: function(node, hash) {

        var style = node.style;

        Y.each(hash, function(v, n) {

            Y_DOM.setStyle(node, n, v, style);

        }, Y_DOM);

    },

    /**

     * Returns the computed style for the given node.

     * @method getComputedStyle

     * @param {HTMLElement} An HTMLElement to get the style from.

     * @param {String} att The style property to get. 

     * @return {String} The computed value of the style property. 

     */

    getComputedStyle: function(node, att) {

        var val = '',

            doc = node[OWNER_DOCUMENT],

            computed;

        if (node[STYLE] && doc[DEFAULT_VIEW] && doc[DEFAULT_VIEW][GET_COMPUTED_STYLE]) {

            computed = doc[DEFAULT_VIEW][GET_COMPUTED_STYLE](node, null);

            if (computed) { // FF may be null in some cases (ticket #2530548)

                val = computed[att];

            }

        }

        return val;

    }

});

// normalize reserved word float alternatives ("cssFloat" or "styleFloat")

if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][CSS_FLOAT] !== UNDEFINED) {

    Y_DOM.CUSTOM_STYLES[FLOAT] = CSS_FLOAT;

} else if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][STYLE_FLOAT] !== UNDEFINED) {

    Y_DOM.CUSTOM_STYLES[FLOAT] = STYLE_FLOAT;

}

// fix opera computedStyle default color unit (convert to rgb)

if (Y.UA.opera) {

    Y_DOM[GET_COMPUTED_STYLE] = function(node, att) {

        var view = node[OWNER_DOCUMENT][DEFAULT_VIEW],

            val = view[GET_COMPUTED_STYLE](node, '')[att];

        if (re_color.test(att)) {

            val = Y.Color.toRGB(val);

        }

        return val;

    };

}

// safari converts transparent to rgba(), others use "transparent"

if (Y.UA.webkit) {

    Y_DOM[GET_COMPUTED_STYLE] = function(node, att) {

        var view = node[OWNER_DOCUMENT][DEFAULT_VIEW],

            val = view[GET_COMPUTED_STYLE](node, '')[att];

        if (val === 'rgba(0, 0, 0, 0)') {

            val = TRANSPARENT; 

        }

        return val;

    };

}

Y.DOM._getAttrOffset = function(node, attr) {

    var val = Y.DOM[GET_COMPUTED_STYLE](node, attr),

        offsetParent = node.offsetParent,

        position,

        parentOffset,

        offset;

    if (val === 'auto') {

        position = Y.DOM.getStyle(node, 'position');

        if (position === 'static' || position === 'relative') {

            val = 0;    

        } else if (offsetParent && offsetParent[GET_BOUNDING_CLIENT_RECT]) {

            parentOffset = offsetParent[GET_BOUNDING_CLIENT_RECT]()[attr];

            offset = node[GET_BOUNDING_CLIENT_RECT]()[attr];

            if (attr === 'left' || attr === 'top') {

                val = offset - parentOffset;

            } else {

                val = parentOffset - node[GET_BOUNDING_CLIENT_RECT]()[attr];

            }

        }

    }

    return val;

};

Y.DOM._getOffset = function(node) {

    var pos,

        xy = null;

    if (node) {

        pos = Y_DOM.getStyle(node, 'position');

        xy = [

            parseInt(Y_DOM[GET_COMPUTED_STYLE](node, 'left'), 10),

            parseInt(Y_DOM[GET_COMPUTED_STYLE](node, 'top'), 10)

        ];

        if ( isNaN(xy[0]) ) { // in case of 'auto'

            xy[0] = parseInt(Y_DOM.getStyle(node, 'left'), 10); // try inline

            if ( isNaN(xy[0]) ) { // default to offset value

                xy[0] = (pos === 'relative') ? 0 : node.offsetLeft || 0;

            }

        } 

        if ( isNaN(xy[1]) ) { // in case of 'auto'

            xy[1] = parseInt(Y_DOM.getStyle(node, 'top'), 10); // try inline

            if ( isNaN(xy[1]) ) { // default to offset value

                xy[1] = (pos === 'relative') ? 0 : node.offsetTop || 0;

            }

        } 

    }

    return xy;

};

Y_DOM.CUSTOM_STYLES.transform = {

    set: function(node, val, style) {

        style[TRANSFORM] = val;

    },

    get: function(node, style) {

        return Y_DOM[GET_COMPUTED_STYLE](node, TRANSFORM);

    }

};

Y_DOM.CUSTOM_STYLES.transformOrigin = {

    set: function(node, val, style) {

        style[TRANSFORMORIGIN] = val;

    },

    get: function(node, style) {

        return Y_DOM[GET_COMPUTED_STYLE](node, TRANSFORMORIGIN);

    }

};

})(Y);

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