rate-it/public/js/helper.js
2014-10-01 07:19:14 +02:00

114 lines
3.2 KiB
JavaScript

if (typeof Object.create !== 'function') {
Object.create = function (o) {
function F() {}
F.prototype = o;
return new F();
};
}
function $tryCatch() {
for (var i = 0, l = arguments.length; i < l; i++){
try {
return arguments[i]();
} catch(e){}
}
return null;
};
var Browser = {
Engine: {name: 'unknown', version: 0},
Platform: {name: (window.orientation != undefined) ? 'ipod' : (navigator.platform.match(/mac|win|linux/i) || ['other'])[0].toLowerCase()},
Features: {xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector)},
Plugins: {},
Engines: {
presto: function(){
return (!window.opera) ? false : ((arguments.callee.caller) ? 960 : ((document.getElementsByClassName) ? 950 : 925));
},
trident: function(){
return (!window.ActiveXObject) ? false : ((window.XMLHttpRequest) ? ((document.querySelectorAll) ? 6 : 5) : 4);
},
webkit: function(){
return (navigator.taintEnabled) ? false : ((Browser.Features.xpath) ? ((Browser.Features.query) ? 525 : 420) : 419);
},
gecko: function(){
return (!document.getBoxObjectFor && window.mozInnerScreenX == null) ? false : ((document.getElementsByClassName) ? 19 : 18);
}
}
};
Browser.Platform[Browser.Platform.name] = true;
Browser.detect = function(){
for (var engine in this.Engines){
var version = this.Engines[engine]();
if (version){
this.Engine = {name: engine, version: version};
this.Engine[engine] = this.Engine[engine + version] = true;
break;
}
}
return {name: engine, version: version};
};
Browser.detect();
Browser.Request = function(){
return $tryCatch(function(){
return new XMLHttpRequest();
}, function(){
return new ActiveXObject('MSXML2.XMLHTTP');
}, function(){
return new ActiveXObject('Microsoft.XMLHTTP');
});
};
Browser.Features.xhr = !!(Browser.Request());
Browser.Plugins.Flash = (function(){
var version = ($tryCatch(function(){
return navigator.plugins['Shockwave Flash'].description;
}, function(){
return new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version');
}) || '0 r0').match(/\d+/g);
return {version: parseInt(version[0] || 0 + '.' + version[1], 10) || 0, build: parseInt(version[2], 10) || 0};
})();
function $exec(text){
if (!text) return text;
if (window.execScript){
window.execScript(text);
} else {
var script = document.createElement('script');
script.setAttribute('type', 'text/javascript');
script[(Browser.Engine.webkit && Browser.Engine.version < 420) ? 'innerText' : 'text'] = text;
document.head.appendChild(script);
document.head.removeChild(script);
}
return text;
};
function getPosition(element) {
var xPosition = 0;
var yPosition = 0;
while(element) {
xPosition += (element.offsetLeft - element.scrollLeft + element.clientLeft);
yPosition += (element.offsetTop - element.scrollTop + element.clientTop);
element = element.offsetParent;
}
return { x: xPosition, y: yPosition };
}