(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',
+
+ DOCUMENT = Y.config.doc,
+ UNDEFINED = undefined,
+
+ re_color = /color$/i;
+
+
+Y.mix(Y.DOM, {
+ 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 for unsetting
+ }
+ 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];
+ }
+ }
+ 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) {
+ var style = node[STYLE],
+ 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];
+
+ if (node[STYLE]) {
+ val = doc[DEFAULT_VIEW][GET_COMPUTED_STYLE](node, null)[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);
+