/**
 * reflection.js v2.0
 * http://cow.neondragon.net/stuff/reflection/
 * Freely distributable under MIT-style license.
 */

/* From prototype.js */
if (!document.myGetElementsByClassName) {
        document.myGetElementsByClassName = function(className) {
                var children = document.getElementsByTagName('*') || document.all;
                var elements = new Array();

                for (var i = 0; i < children.length; i++) {
                        var child = children[i];
                        var classNames = child.className.split(' ');
                        for (var j = 0; j < classNames.length; j++) {
                                if (classNames[j] == className) {
                                        elements.push(child);
                                        break;
                                }
                        }
                }
                return elements;
        }
}

var Reflection = {
        defaultHeight : 0.5,
        defaultOpacity: 0.5,

        add: function(image, options) {
                Reflection.remove(image);

                doptions = { "height" : Reflection.defaultHeight, "opacity" : Reflection.defaultOpacity }
                if (options) {
                        for (var i in doptions) {
                                if (!options[i]) {
                                        options[i] = doptions[i];
                                }
                        }
                } else {
                        options = doptions;
                }

                try {
                        var d = document.createElement('div');
                        var p = image;

                        var classes = p.className.split(' ');
                        var newClasses = '';
                        for (j=0;j<classes.length;j++) {
                                if (classes[j] != "reflect") {
                                        if (newClasses) {
                                                newClasses += ' '
                                        }

                                        newClasses += classes[j];
                                }
                        }

                        var reflectionHeight = Math.floor(p.height*options['height']);
                        var divHeight = Math.floor(p.height*(1+options['height']));

                        var reflectionWidth = p.width;

                        if (document.all && !window.opera) {
                                /* Fix hyperlinks */
                if(p.parentElement.tagName == 'A') {
                        var d = document.createElement('a');
                        d.href = p.parentElement.href;
                }

                                /* Copy original image's classes & styles to div */
                                d.className = newClasses;
                                p.className = 'reflected';

                                d.style.cssText = p.style.cssText;
                                p.style.cssText = 'vertical-align: bottom';

                                var reflection = document.createElement('img');
                                reflection.src = p.src;
                                reflection.style.width = reflectionWidth+'px';
                                reflection.style.display = 'block';
                                reflection.style.height = p.height+"px";

                                reflection.style.marginBottom = "-"+(p.height-reflectionHeight)+'px';
                                reflection.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity='+(options['opacity']*100)+', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+(options['height']*100)+')';

                                d.style.width = reflectionWidth+'px';
                                d.style.height = divHeight+'px';
                                p.parentNode.replaceChild(d, p);

                                d.appendChild(p);
                                d.appendChild(reflection);
                        } else {
                                var canvas = document.createElement('canvas');
                                if (canvas.getContext) {
                                        /* Copy original image's classes & styles to div */
                                        d.className = newClasses;
                                        p.className = 'reflected';

                                        d.style.cssText = p.style.cssText;
                                        p.style.cssText = 'vertical-align: bottom';

                                        var context = canvas.getContext("2d");

                                        canvas.style.height = reflectionHeight+'px';
                                        canvas.style.width = reflectionWidth+'px';
                                        canvas.height = reflectionHeight;
                                        canvas.width = reflectionWidth;

                                        d.style.width = reflectionWidth+'px';
                                        d.style.height = divHeight+'px';
                                        p.parentNode.replaceChild(d, p);

                                        d.appendChild(p);
                                        d.appendChild(canvas);

                                        context.save();

                                        context.translate(0,image.height-1);
                                        context.scale(1,-1);

                                        context.drawImage(image, 0, 0, reflectionWidth, image.height);

                                        context.restore();

                                        context.globalCompositeOperation = "destination-out";
                                        var gradient = context.createLinearGradient(0, 0, 0, reflectionHeight);

                                        gradient.addColorStop(1, "rgba(255, 255, 255, 1.0)");
                                        gradient.addColorStop(0, "rgba(255, 255, 255, "+(1-options['opacity'])+")");

                                        context.fillStyle = gradient;
                                        context.rect(0, 0, reflectionWidth, reflectionHeight*2);
                                        context.fill();
                                }
                        }
                } catch (e) {
            }
        },

        remove : function(image) {
                if (image.className == "reflected") {
                        image.className = image.parentNode.className;
                        image.parentNode.parentNode.replaceChild(image, image.parentNode);
                }
        }
}

function addReflections() {
        var rimages = document.myGetElementsByClassName('reflect');
        for (i=0;i<rimages.length;i++) {
                var rheight = null;
                var ropacity = null;

                var classes = rimages[i].className.split(' ');
                for (j=0;j<classes.length;j++) {
                        if (classes[j].indexOf("rheight") == 0) {
                                var rheight = classes[j].substring(7)/100;
                        } else if (classes[j].indexOf("ropacity") == 0) {
                                var ropacity = classes[j].substring(8)/100;
                        }
                }

                Reflection.add(rimages[i], { height: rheight, opacity : ropacity});
        }
}

var previousOnload = window.onload;
window.onload = function () { if(previousOnload) previousOnload(); addReflections(); }