/**
 * jQuery (PNG Fix)
 * Microsoft Internet Explorer 24bit PNG Fix
 *
 * The MIT License
 *
 * Copyright (c) 2007 Paul Campbell (pauljamescampbell.co.uk)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @param               Object
 * @return              Array
 */
(function($) {

        $.fn.pngfix = function(options) {

                // ECMA scope fix
                var elements    = this;
                // Plug-in values
                var settings    = $.extend({
                        imageFixSrc:    false
                }, options);

                if(!$.browser.msie || ($.browser.msie &&  $.browser.version >= 7)) {
                        return(elements); // Kill
                }

                function setFilter(el, path, mode) {
                        // Apply filter to element, setting the MSDN properties:
                        //              :src
                        //              :enabled
                        //              :sizingMethod
                        var fs                  = el.attr("filters");
                        var alpha               = "DXImageTransform.Microsoft.AlphaImageLoader";
                        if (fs[alpha]) {
                                with (fs[alpha]) {
                                        enabled = true;
                                        src = path;
                                        sizingMethod = mode;
                                }
                        } else {
                                el.css("filter", 'progid:' + alpha + '(enabled="true", sizingMethod="' + mode + '", src="' + path + '")');
                        }
                }

                function forceWidth(el) {
                        if(el.css("width") == "auto" & el.css("height") == "auto") {
                                // Only force width of element if it's set to auto
                                el.css("width", el.attr("offsetWidth") + "px");
                        }
                }

                // __APPLY__

                return(
                        elements.each(function() {

                                var el = $(this);

                                if(el.attr("tagName").toUpperCase() == "IMG" && (/.png"?$/).test(el.attr("src"))) {

                                        if(!settings.imageFixSrc) {
                                                // Wrap the <img> in a <span> then apply style/filters,
                                                // removing the <img> tag from the final render
                                                el.wrap("<span></span>");
                                                var par = el.parent();
                                                par.css({
                                                        height:         el.height(),
                                                        width:          el.width(),
                                                        display:        "inline-block"
                                                });
                                                setFilter(par, el.attr("src"), "scale");
                                                el.remove();
                                        } else if((/.gif$/).test(settings.imageFixSrc)) {
                                                // Replace the current image with a transparent GIF
                                                // and apply the filter to the background of the
                                                // <img> tag (not the preferred route)
                                                forceWidth(el);
                                                setFilter(el, el.attr("src"), "image");
                                                el.attr("src", settings.imageFixSrc);
                                        }

                                } else {
                                        var bg = el.css("backgroundImage");
                                        var matches = bg.match(/^url\("(.*)"\)$/);
                                        if(matches.length) {
                                                // Elements with a PNG as a backgroundImage have the
                                                // filter applied with a sizing method relevant to the
                                                // background repeat type
                                                forceWidth(el);
                                                el.css("backgroundImage", "none");

                                                // Restrict scaling methods to valid MSDN defintions (or one custom)
                                                if(el.css("backgroundRepeat").indexOf("repeat") > -1) {
                                                        var sc = settings.repeatMethod == "repeat" ? "repeat" : "scale";
                                                } else {
                                                        var sc = "crop";
                                                }
                                                setFilter(el, matches[1], sc);

                                                // IE peek-a-boo for internal links
                                                el.find("a").each(function() {
                                                        $(this).css("position", "relative");
                                                });
                                        }
                                }


                        }) // __END__
                );
        }

})(jQuery)