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(function(){
/*
* Reflector JavaScript Library version 1.0
* http://lab.hisasann.com/reflector/
*
* Copyright (c) 2009 hisasann http://hisasann.com/
* Dual licensed under the MIT and GPL licenses.
*/
var Reflector = function(){}
var div, canvas, height, width, elem, divHeight;
Reflector.prototype = {
_attr : "reflection",
_opacity : 0.5,
_height : 0.5,
isIE : (document.all && !window.opera),
reflect : function(){
this.images = this.get();
for (var i=0,len=this.images.length; i<len; ++i) {
elem = this.images[i];
this.createCanvas();
}
},
simpleReflect : function(obj) {
elem = obj;
this.createCanvas();
},
createCanvas : function(){
div = document.createElement("div"),
canvas = document.createElement("canvas"),
refHeight = Math.floor(elem.height * this._height);
refWidth = elem.width;
divHeight = Math.floor(elem.height * (1 + this._height));
if(canvas.getContext)
this.forModern();
else
this.forIE();
},
forModern : function(){
canvas.style.height = refHeight + "px";
canvas.style.width = refWidth + "px";
canvas.height = refHeight;
canvas.width = refWidth;
// クラスを外枠のdivに設定
div.className = elem.className;
elem.className = "";
// インラインスタイルを外枠のdivに設定
div.style.cssText = elem.style.cssText;
div.style.height = divHeight + "px";
div.style.width = refWidth + "px";
elem.style.cssText = 'vertical-align: bottom';
elem.parentNode.replaceChild(div, elem);
div.appendChild(elem);
div.appendChild(canvas);
var ctx = canvas.getContext("2d")
with(ctx){
save();
translate(0, elem.height-1);
scale(1,-1);
drawImage(elem, 0, 0, elem.width, elem.height);
restore();
var gradient = createLinearGradient(0, 0, 0, refHeight);
gradient.addColorStop(1, "rgba(0, 0, 0, 1)");
gradient.addColorStop(0, "rgba(0, 0, 0, " + this._opacity + ")");
globalCompositeOperation = "destination-out";
fillStyle = gradient;
fillRect(0, 0, refWidth, refHeight);
fill();
}
},
forIE : function(){
var reflection = document.createElement("img");
// インラインスタイルを合わせる
reflection.style.cssText = elem.style.cssText;
elem.style.cssText = 'vertical-align: bottom';
// クラスを合わせる
reflection.className = elem.className;
with(reflection){
src = elem.src;
style.width = refWidth + "px";
style.height = elem.height + "px";
style.display = "block";
style.marginBottom = "-"+(elem.height - refHeight)+"px";
style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity='+(this._opacity*100)+', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+(this._height*100)+')';
}
// IEの場合はdivタグで囲わない。
// もしimgタグの親にaタグがいた場合、divタグにwidth・heightを指定しているとリンクをクリックできなくなるため
elem.parentNode.appendChild(reflection);
},
get : function(){
var children = document.getElementsByTagName("*") || document.all;
var elements = new Array();
for (var i=0,len=children.length; i<len; ++i) {
var child = children[i];
var attr = child.getAttribute("reflection");
if(attr && attr == "true") {
elements.push(child);
}
}
return elements;
}
}
function getActiveStyle(div_obj, property, value) {
//IE (IE6.0,IE7.0,Opera)
if( div_obj.currentStyle ) {
return div_obj.currentStyle[property];
//Mozilla (Firefox,Netscape,WinSafari)
} else if(document.defaultView.getComputedStyle) {
//null replace Emptystring reson is Netscape
return document.defaultView.getComputedStyle(div_obj, (value==null?"":value)).getPropertyValue(property);
}
return "";
}
window.Reflector = new Reflector();
})();
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