travi/php-framework

/**
 * 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(); }