/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-09-18 17:18:59 (940c324ac822b840618a3a8b2b4b873f83a1a9b1)
*/
// @tag dom,core
/**
 */
Ext.define('Ext.dom.AbstractElement_style', {

    override: 'Ext.dom.AbstractElement'

}, function() {
    // local style camelizing for speed
    var Element = this,
        wordsRe = /\w/g,
        spacesRe = /\s+/,
        transparentRe = /^(?:transparent|(?:rgba[(](?:\s*\d+\s*[,]){3}\s*0\s*[)]))$/i,
        // In some browsers, currently IE10 and older chrome versions, when ClassList is 
        // supported most elements will have the classList attribute, but some svg elements
        // will still not have it present, so in a small amount of cases we'll still need
        // to check at run time whether we can use it.
        hasClassList = Ext.supports.ClassList,
        PADDING = 'padding',
        MARGIN = 'margin',
        BORDER = 'border',
        LEFT_SUFFIX = '-left',
        RIGHT_SUFFIX = '-right',
        TOP_SUFFIX = '-top',
        BOTTOM_SUFFIX = '-bottom',
        WIDTH = '-width',
        // special markup used throughout Ext when box wrapping elements
        borders = {l: BORDER + LEFT_SUFFIX + WIDTH, r: BORDER + RIGHT_SUFFIX + WIDTH, t: BORDER + TOP_SUFFIX + WIDTH, b: BORDER + BOTTOM_SUFFIX + WIDTH},
        paddings = {l: PADDING + LEFT_SUFFIX, r: PADDING + RIGHT_SUFFIX, t: PADDING + TOP_SUFFIX, b: PADDING + BOTTOM_SUFFIX},
        margins = {l: MARGIN + LEFT_SUFFIX, r: MARGIN + RIGHT_SUFFIX, t: MARGIN + TOP_SUFFIX, b: MARGIN + BOTTOM_SUFFIX},
        internalFly = new Element.Fly();


    Ext.override(Element, {

        /**
         * This shared object is keyed by style name (e.g., 'margin-left' or 'marginLeft'). The
         * values are objects with the following properties:
         *
         *  * `name` (String) : The actual name to be presented to the DOM. This is typically the value
         *      returned by {@link #normalize}.
         *  * `get` (Function) : A hook function that will perform the get on this style. These
         *      functions receive "(dom, el)" arguments. The `dom` parameter is the DOM Element
         *      from which to get ths tyle. The `el` argument (may be null) is the Ext.Element.
         *  * `set` (Function) : A hook function that will perform the set on this style. These
         *      functions receive "(dom, value, el)" arguments. The `dom` parameter is the DOM Element
         *      from which to get ths tyle. The `value` parameter is the new value for the style. The
         *      `el` argument (may be null) is the Ext.Element.
         *
         * The `this` pointer is the object that contains `get` or `set`, which means that
         * `this.name` can be accessed if needed. The hook functions are both optional.
         * @private
         */
        styleHooks: {},

        // private
        addStyles : function(sides, styles){
            var totalSize = 0,
                sidesArr = (sides || '').match(wordsRe),
                i,
                len = sidesArr.length,
                side,
                styleSides = [];

            if (len == 1) {
                totalSize = Math.abs(parseFloat(this.getStyle(styles[sidesArr[0]])) || 0);
            } else if (len) {
                for (i = 0; i < len; i++) {
                    side = sidesArr[i];
                    styleSides.push(styles[side]);
                }
                //Gather all at once, returning a hash
                styleSides = this.getStyle(styleSides);

                for (i=0; i < len; i++) {
                    side = sidesArr[i];
                    totalSize += Math.abs(parseFloat(styleSides[styles[side]]) || 0);
                }
            }

            return totalSize;
        },

        /**
         * Adds one or more CSS classes to the element. Duplicate classes are automatically filtered out.
         * @param {String/String[]} className The CSS classes to add separated by space, or an array of classes
         * @return {Ext.dom.Element} this
         * @method
         */
        addCls: (function(){
            var addWithClassList = function(className) {
                //<debug warn>
                if (String(className).indexOf('undefined') > -1) {
                    Ext.Logger.warn("called with an undefined className: " + className);
                }
                //</debug>
                var me = this,
                    dom = me.dom,
                    trimRe = me.trimRe,
                    origClassName = className,
                    classList,
                    newCls,
                    i,
                    len,
                    cls;

                if (typeof(className) == 'string') {
                    // split string on spaces to make an array of className
                    className = className.replace(trimRe, '').split(spacesRe);
                }

                // the gain we have here is that we can skip parsing className and use the
                // classList.contains method, so now O(M) not O(M+N)
                if (dom && className && !!(len = className.length)) {
                    if (!dom.className) {
                        dom.className = className.join(' ');
                    } else {
                        classList = dom.classList;
                        if (classList) {
                            for (i = 0; i < len; ++i) {
                                cls = className[i];
                                if (cls) {
                                    if (!classList.contains(cls)) {
                                        if (newCls) {
                                            newCls.push(cls);
                                        } else {
                                            newCls = dom.className.replace(trimRe, '');
                                            newCls = newCls ? [newCls, cls] : [cls];
                                        }
                                    }
                                }
                            }

                            if (newCls) {
                                dom.className = newCls.join(' '); // write to DOM once
                            }
                        } else {
                            addWithoutClassList(origClassName);
                        }
                    }
                }
                return me;
            }, addWithoutClassList = function(className) {
                //<debug warn>
                if (String(className).indexOf('undefined') > -1) {
                    Ext.Logger.warn("called with an undefined className: '" + className + "'");
                }
                //</debug>
                var me = this,
                    dom = me.dom,
                    elClasses;

                if (dom && className && className.length) {
                    elClasses = Ext.Element.mergeClsList(dom.className, className);
                    if (elClasses.changed) {
                        dom.className = elClasses.join(' '); // write to DOM once
                    }
                }
                return me;
            };
            
            return hasClassList ? addWithClassList : addWithoutClassList;
        })(),


        /**
         * Removes one or more CSS classes from the element.
         * @param {String/String[]} className The CSS classes to remove separated by space, or an array of classes
         * @return {Ext.dom.Element} this
         */
        removeCls: function(className) {
            var me = this,
                dom = me.dom,
                classList,
                len,
                elClasses;

            if (typeof(className) == 'string') {
                // split string on spaces to make an array of className
                className = className.replace(me.trimRe, '').split(spacesRe);
            }

            if (dom && dom.className && className && !!(len = className.length)) {
                classList = dom.classList;
                if (len === 1 && classList) {
                    if (className[0]) {
                        classList.remove(className[0]); // one DOM write
                    }
                } else {
                    elClasses = Ext.Element.removeCls(dom.className, className);
                    if (elClasses.changed) {
                        dom.className = elClasses.join(' ');
                    }
                }
            }
            return me;
        },

        /**
         * Adds one or more CSS classes to this element and removes the same class(es) from all siblings.
         * @param {String/String[]} className The CSS class to add, or an array of classes
         * @return {Ext.dom.Element} this
         */
        radioCls: function(className) {
            var cn = this.dom.parentNode.childNodes,
                v,
                i, len;
            className = Ext.isArray(className) ? className: [className];
            for (i = 0, len = cn.length; i < len; i++) {
                v = cn[i];
                if (v && v.nodeType == 1) {
                    internalFly.attach(v).removeCls(className);
                }
            }
            return this.addCls(className);
        },

        /**
         * Toggles the specified CSS class on this element (removes it if it already exists, otherwise adds it).
         * @param {String} className The CSS class to toggle
         * @return {Ext.dom.Element} this
         * @method
         */
        toggleCls: (function(){
            var toggleWithClassList = function(className){
                var me = this,
                    dom = me.dom,
                    classList;

                if (dom) {
                    className = className.replace(me.trimRe, '');
                    if (className) {
                        classList = dom.classList;
                        if (classList) {
                            classList.toggle(className);
                        } else {
                            toggleWithoutClassList(className);
                        }
                    }
                }

                return me;
            }, toggleWithoutClassList = function(className){
                return this.hasCls(className) ? this.removeCls(className) : this.addCls(className);
            };
            
            return hasClassList ? toggleWithClassList :  toggleWithoutClassList;
        })(),

        /**
         * Checks if the specified CSS class exists on this element's DOM node.
         * @param {String} className The CSS class to check for
         * @return {Boolean} True if the class exists, else false
         * @method
         */
        hasCls: (function(){
            var hasClsWithClassList = function(className) {
                var dom = this.dom,
                    out = false,
                    classList;
                    
                if (dom && className) {
                    classList = dom.classList;
                    if (classList) {
                        out = classList.contains(className);
                    } else {
                        out = hasClsWithoutClassList(className);
                    }
                }
                return out;
            }, hasClsWithoutClassList = function(className){
                var dom = this.dom;
                return dom ? className && (' '+dom.className+' ').indexOf(' '+className+' ') !== -1 : false;
            };
            
            return hasClassList ? hasClsWithClassList : hasClsWithoutClassList;
        })(),

        /**
         * Replaces a CSS class on the element with another.  If the old name does not exist, the new name will simply be added.
         * @param {String} oldClassName The CSS class to replace
         * @param {String} newClassName The replacement CSS class
         * @return {Ext.dom.Element} this
         */
        replaceCls: function(oldClassName, newClassName){
            return this.removeCls(oldClassName).addCls(newClassName);
        },

        /**
         * Checks if the current value of a style is equal to a given value.
         * @param {String} style property whose value is returned.
         * @param {String} value to check against.
         * @return {Boolean} true for when the current value equals the given value.
         */
        isStyle: function(style, val) {
            return this.getStyle(style) == val;
        },

        /**
         * Returns a named style property based on computed/currentStyle (primary) and
         * inline-style if primary is not available.
         *
         * @param {String/String[]} property The style property (or multiple property names
         * in an array) whose value is returned.
         * @param {Boolean} [inline=false] if `true` only inline styles will be returned.
         * @return {String/Object} The current value of the style property for this element
         * (or a hash of named style values if multiple property arguments are requested).
         * @method
         */
        getStyle: function (property, inline) {
            var me = this,
                dom = me.dom,
                multiple = typeof property != 'string',
                hooks = me.styleHooks,
                prop = property,
                props = prop,
                len = 1,
                domStyle, camel, values, hook, out, style, i;

            if (multiple) {
                values = {};
                prop = props[0];
                i = 0;
                if (!(len = props.length)) {
                    return values;
                }
            }

            if (!dom || dom.documentElement) {
                return values || '';
            }

            domStyle = dom.style;

            if (inline) {
                style = domStyle;
            } else {
                // Caution: Firefox will not render "presentation" (ie. computed styles) in
                // iframes that are display:none or those inheriting display:none. Similar
                // issues with legacy Safari.
                //
                style = dom.ownerDocument.defaultView.getComputedStyle(dom, null);

                // fallback to inline style if rendering context not available
                if (!style) {
                    inline = true;
                    style = domStyle;
                }
            }

            do {
                hook = hooks[prop];

                if (!hook) {
                    hooks[prop] = hook = { name: Element.normalize(prop) };
                }

                if (hook.get) {
                    out = hook.get(dom, me, inline, style);
                } else {
                    camel = hook.name;
                    out = style[camel];
                }

                if (!multiple) {
                   return out;
                }

                values[prop] = out;
                prop = props[++i];
            } while (i < len);

            return values;
        },

        getStyles: function () {
            var props = Ext.Array.slice(arguments),
                len = props.length,
                inline;

            if (len && typeof props[len-1] == 'boolean') {
                inline = props.pop();
            }

            return this.getStyle(props, inline);
        },

        /**
         * Returns true if the value of the given property is visually transparent. This
         * may be due to a 'transparent' style value or an rgba value with 0 in the alpha
         * component.
         * @param {String} prop The style property whose value is to be tested.
         * @return {Boolean} True if the style property is visually transparent.
         */
        isTransparent: function (prop) {
            var value = this.getStyle(prop);
            return value ? transparentRe.test(value) : false;
        },

        /**
         * Wrapper for setting style properties, also takes single object parameter of multiple styles.
         * @param {String/Object} property The style property to be set, or an object of multiple styles.
         * @param {String} [value] The value to apply to the given property, or null if an object was passed.
         * @return {Ext.dom.Element} this
         */
        setStyle: function(prop, value) {
            var me = this,
                dom = me.dom,
                hooks = me.styleHooks,
                style = dom.style,
                name = prop,
                hook;

            // we don't promote the 2-arg form to object-form to avoid the overhead...
            if (typeof name == 'string') {
                hook = hooks[name];
                if (!hook) {
                    hooks[name] = hook = { name: Element.normalize(name) };
                }
                value = (value == null) ? '' : value;
                if (hook.set) {
                    hook.set(dom, value, me);
                } else {
                    style[hook.name] = value;
                }
                if (hook.afterSet) {
                    hook.afterSet(dom, value, me);
                }
            } else {
                for (name in prop) {
                    if (prop.hasOwnProperty(name)) {
                        hook = hooks[name];
                        if (!hook) {
                            hooks[name] = hook = { name: Element.normalize(name) };
                        }
                        value = prop[name];
                        value = (value == null) ? '' : value;
                        if (hook.set) {
                            hook.set(dom, value, me);
                        } else {
                            style[hook.name] = value;
                        }
                        if (hook.afterSet) {
                            hook.afterSet(dom, value, me);
                        }
                    }
                }
            }

            return me;
        },

        /**
         * Returns the offset height of the element
         * @param {Boolean} [contentHeight] true to get the height minus borders and padding
         * @return {Number} The element's height
         */
        getHeight: function(contentHeight) {
            var dom = this.dom,
                height = contentHeight ? (dom.clientHeight - this.getPadding("tb")) : dom.offsetHeight;
            return height > 0 ? height: 0;
        },

        /**
         * Returns the offset width of the element
         * @param {Boolean} [contentWidth] true to get the width minus borders and padding
         * @return {Number} The element's width
         */
        getWidth: function(contentWidth) {
            var dom = this.dom,
                width = contentWidth ? (dom.clientWidth - this.getPadding("lr")) : dom.offsetWidth;
            return width > 0 ? width: 0;
        },

        /**
         * Set the width of this Element.
         * @param {Number/String} width The new width. This may be one of:
         *
         * - A Number specifying the new width in this Element's {@link #defaultUnit}s (by default, pixels).
         * - A String used to set the CSS width style. Animation may **not** be used.
         *
         * @return {Ext.dom.Element} this
         */
        setWidth: function(width) {
            var me = this;
                me.dom.style.width = Element.addUnits(width);
            return me;
        },

        /**
         * Set the height of this Element.
         *
         *     // change the height to 200px and animate with default configuration
         *     Ext.fly('elementId').setHeight(200, true);
         *
         *     // change the height to 150px and animate with a custom configuration
         *     Ext.fly('elId').setHeight(150, {
         *         duration : 500, // animation will have a duration of .5 seconds
         *         // will change the content to "finished"
         *         callback: function(){ this.{@link #update}("finished"); }
         *     });
         *
         * @param {Number/String} height The new height. This may be one of:
         *
         * - A Number specifying the new height in this Element's {@link #defaultUnit}s (by default, pixels.)
         * - A String used to set the CSS height style. Animation may **not** be used.
         *
         * @return {Ext.dom.Element} this
         */
        setHeight: function(height) {
            var me = this;
                me.dom.style.height = Element.addUnits(height);
            return me;
        },

        /**
         * Gets the width of the border(s) for the specified side(s)
         * @param {String} side Can be t, l, r, b or any combination of those to add multiple values. For example,
         * passing `'lr'` would get the border **l**eft width + the border **r**ight width.
         * @return {Number} The width of the sides passed added together
         */
        getBorderWidth: function(side){
            return this.addStyles(side, borders);
        },

        /**
         * Gets the width of the padding(s) for the specified side(s)
         * @param {String} side Can be t, l, r, b or any combination of those to add multiple values. For example,
         * passing `'lr'` would get the padding **l**eft + the padding **r**ight.
         * @return {Number} The padding of the sides passed added together
         */
        getPadding: function(side){
            return this.addStyles(side, paddings);
        },

        margins : margins,

        /**
         * More flexible version of {@link #setStyle} for setting style properties.
         * @param {String/Object/Function} styles A style specification string, e.g. "width:100px", or object in the form {width:"100px"}, or
         * a function which returns such a specification.
         * @return {Ext.dom.Element} this
         */
        applyStyles: function(styles) {
            if (styles) {
                var i,
                    len,
                    dom = this.dom;

                if (typeof styles == 'function') {
                    styles = styles.call();
                }
                if (typeof styles == 'string') {
                    styles = Ext.util.Format.trim(styles).split(/\s*(?::|;)\s*/);
                    for (i = 0, len = styles.length; i < len;) {
                        dom.style[Element.normalize(styles[i++])] = styles[i++];
                    }
                }
                else if (typeof styles == 'object') {
                    this.setStyle(styles);
                }
            }
        },

        /**
         * Set the size of this Element. If animation is true, both width and height will be animated concurrently.
         * @param {Number/String} width The new width. This may be one of:
         *
         * - A Number specifying the new width in this Element's {@link #defaultUnit}s (by default, pixels).
         * - A String used to set the CSS width style. Animation may **not** be used.
         * - A size object in the format `{width: widthValue, height: heightValue}`.
         *
         * @param {Number/String} height The new height. This may be one of:
         *
         * - A Number specifying the new height in this Element's {@link #defaultUnit}s (by default, pixels).
         * - A String used to set the CSS height style. Animation may **not** be used.
         *
         * @return {Ext.dom.Element} this
         */
        setSize: function(width, height) {
            var me = this,
                style = me.dom.style;

            if (Ext.isObject(width)) {
                // in case of object from getSize()
                height = width.height;
                width = width.width;
            }

            style.width = Element.addUnits(width);
            style.height = Element.addUnits(height);
            return me;
        },

        /**
         * Returns the dimensions of the element available to lay content out in.
         *
         * If the element (or any ancestor element) has CSS style `display: none`, the dimensions will be zero.
         *
         * Example:
         *
         *     var vpSize = Ext.getBody().getViewSize();
         *
         *     // all Windows created afterwards will have a default value of 90% height and 95% width
         *     Ext.Window.override({
         *         width: vpSize.width * 0.9,
         *         height: vpSize.height * 0.95
         *     });
         *     // To handle window resizing you would have to hook onto onWindowResize.
         *
         * getViewSize utilizes clientHeight/clientWidth which excludes sizing of scrollbars.
         * To obtain the size including scrollbars, use getStyleSize
         *
         * Sizing of the document body is handled at the adapter level which handles special cases for IE and strict modes, etc.
         *
         * @return {Object} Object describing width and height.
         * @return {Number} return.width
         * @return {Number} return.height
         */
        getViewSize: function() {
            var doc = document,
                dom = this.dom;

            if (dom == doc || dom == doc.body) {
                return {
                    width: Element.getViewportWidth(),
                    height: Element.getViewportHeight()
                };
            }
            else {
                return {
                    width: dom.clientWidth,
                    height: dom.clientHeight
                };
            }
        },

        /**
         * Returns the size of the element.
         * @param {Boolean} [contentSize] true to get the width/size minus borders and padding
         * @return {Object} An object containing the element's size:
         * @return {Number} return.width
         * @return {Number} return.height
         */
        getSize: function(contentSize) {
            var dom = this.dom;
            return {
                width: Math.max(0, contentSize ? (dom.clientWidth - this.getPadding("lr")) : dom.offsetWidth),
                height: Math.max(0, contentSize ? (dom.clientHeight - this.getPadding("tb")) : dom.offsetHeight)
            };
        },

        /**
         * Forces the browser to repaint this element
         * @return {Ext.dom.Element} this
         */
        repaint: function() {
            var dom = this.dom;
            this.addCls(Ext.baseCSSPrefix + 'repaint');
            setTimeout(function(){
                internalFly.attach(dom).removeCls(Ext.baseCSSPrefix + 'repaint');
            }, 1);
            return this;
        },

        /**
         * Returns an object with properties top, left, right and bottom representing the margins of this element unless sides is passed,
         * then it returns the calculated width of the sides (see getPadding)
         * @param {String} [sides] Any combination of l, r, t, b to get the sum of those sides
         * @return {Object/Number}
         */
        getMargin: function(side){
            var me = this,
                hash = {t:"top", l:"left", r:"right", b: "bottom"},
                key,
                o,
                margins;

            if (!side) {
                margins = [];
                for (key in me.margins) {
                    if(me.margins.hasOwnProperty(key)) {
                        margins.push(me.margins[key]);
                    }
                }
                o = me.getStyle(margins);
                if(o && typeof o == 'object') {
                    //now mixin nomalized values (from hash table)
                    for (key in me.margins) {
                        if(me.margins.hasOwnProperty(key)) {
                            o[hash[key]] = parseFloat(o[me.margins[key]]) || 0;
                        }
                    }
                }

                return o;
            } else {
                return me.addStyles(side, me.margins);
            }
        },

        /**
         * Puts a mask over this element to disable user interaction. Requires core.css.
         * This method can only be applied to elements which accept child nodes.
         * @param {String} [msg] A message to display in the mask
         * @param {String} [msgCls] A css class to apply to the msg element
         */
        mask: function(msg, msgCls, transparent) {
            var me = this,
                dom = me.dom,
                data = (me.$cache || me.getCache()).data,
                el = data.mask,
                mask,
                size,
                cls = '',
                prefix = Ext.baseCSSPrefix;

            me.addCls(prefix + 'masked');
            if (me.getStyle("position") == "static") {
                me.addCls(prefix + 'masked-relative');
            }
            if (el) {
                el.remove();
            }
            if (msgCls && typeof msgCls == 'string' ) {
                cls = ' ' + msgCls;
            }
            else {
                cls = ' ' + prefix + 'mask-gray';
            }

            mask = me.createChild({
                role: 'presentation',
                cls: prefix + 'mask' + ((transparent !== false) ? '' : (' ' + prefix + 'mask-gray')),
                html: msg ? ('<div class="' + (msgCls || (prefix + 'mask-message')) + '" role="presentation">' + msg + '</div>') : ''
            });

            size = me.getSize();

            data.mask = mask;

            if (dom === document.body) {
                size.height = window.innerHeight;
                if (me.orientationHandler) {
                    Ext.EventManager.unOrientationChange(me.orientationHandler, me);
                }

                me.orientationHandler = function() {
                    size = me.getSize();
                    size.height = window.innerHeight;
                    mask.setSize(size);
                };

                Ext.EventManager.onOrientationChange(me.orientationHandler, me);
            }
            mask.setSize(size);
            if (Ext.is.iPad) {
                Ext.repaint();
            }
        },

        /**
         * Removes a previously applied mask.
         */
        unmask: function() {
            var me = this,
                data = (me.$cache || me.getCache()).data,
                mask = data.mask,
                prefix = Ext.baseCSSPrefix;

            if (mask) {
                mask.remove();
                delete data.mask;
            }
            me.removeCls([prefix + 'masked', prefix + 'masked-relative']);

            if (me.dom === document.body) {
                Ext.EventManager.unOrientationChange(me.orientationHandler, me);
                delete me.orientationHandler;
            }
        }
    });


    Ext.onReady(function () {
        var supports = Ext.supports,
            styleHooks,
            colorStyles, i, name, camel;

        function fixTransparent (dom, el, inline, style) {
            var value = style[this.name] || '';
            return transparentRe.test(value) ? 'transparent' : value;
        }

        function fixRightMargin (dom, el, inline, style) {
            var result = style.marginRight,
                domStyle, display;

            // Ignore cases when the margin is correctly reported as 0, the bug only shows
            // numbers larger.
            if (result != '0px') {
                domStyle = dom.style;
                display = domStyle.display;
                domStyle.display = 'inline-block';
                result = (inline ? style : dom.ownerDocument.defaultView.getComputedStyle(dom, null)).marginRight;
                domStyle.display = display;
            }

            return result;
        }

        function fixRightMarginAndInputFocus (dom, el, inline, style) {
            var result = style.marginRight,
                domStyle, cleaner, display;

            if (result != '0px') {
                domStyle = dom.style;
                cleaner = Element.getRightMarginFixCleaner(dom);
                display = domStyle.display;
                domStyle.display = 'inline-block';
                result = (inline ? style : dom.ownerDocument.defaultView.getComputedStyle(dom, '')).marginRight;
                domStyle.display = display;
                cleaner();
            }

            return result;
        }

        styleHooks = Element.prototype.styleHooks;

        // Ext.supports needs to be initialized (we run very early in the onready sequence),
        // but it is OK to call Ext.supports.init() more times than necessary...
        if (supports.init) {
            supports.init();
        }

        // Fix bug caused by this: https://bugs.webkit.org/show_bug.cgi?id=13343
        if (!supports.RightMargin) {
            styleHooks.marginRight = styleHooks['margin-right'] = {
                name: 'marginRight',
                // TODO - Touch should use conditional compilation here or ensure that the
                //      underlying Ext.supports flags are set correctly...
                get: (supports.DisplayChangeInputSelectionBug || supports.DisplayChangeTextAreaSelectionBug) ?
                    fixRightMarginAndInputFocus : fixRightMargin
            };
        }

        if (!supports.TransparentColor) {
            colorStyles = ['background-color', 'border-color', 'color', 'outline-color'];
            for (i = colorStyles.length; i--; ) {
                name = colorStyles[i];
                camel = Element.normalize(name);

                styleHooks[name] = styleHooks[camel] = {
                    name: camel,
                    get: fixTransparent
                };
            }
        }
    });

});
