her-pc-demo/home/widget/js-helper/bigRender.js

a fis pc demo run on HER

/*
*           File:  bigRender.js
*           Path:  commmon/js/bigRender.js
*         Author:  HuangYi
*       Modifier:  HuangYi
*       Modified:  2013-7-16
*    Description:  延迟渲染js
*/
var lazy = require("./lazy.js");

function add(pagelet) {

    var lazyKey, ele, cssText;
    try {
        if(false && pagelet.parent){
            pagelet.parent.on("load",function(){
                bindBigRender(pagelet);
            });
        }else{
            bindBigRender(pagelet);
        }
        return true;    
    }catch (e) {
        setTimeout(function () {
            throw e;
        }, 0);
        return false;
    }
}

function bindBigRender(pagelet){
    var ele = document.getElementById(pagelet.id);
    addClass(ele, "g-bigrender");
    var lazyKey = lazy.add(ele, function () {

        pagelet.on("load", function () {
            removeClass(ele, "g-bigrender");
        });
        pagelet.load();
    });

    pagelet.on("unload", function () {
        lazy.remove(lazyKey);
    });
}

function addClass(element, className) {
    if (!element) 
        return;
    var elementClassName = element.className;
    if (elementClassName.length == 0) {
        element.className = className;
        return;
    }
    if (elementClassName == className || elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
        return;
    element.className = elementClassName + " " + className;
}

function removeClass(element, className) {
    if (!element) 
        return;
    var elementClassName = element.className;
    if (elementClassName.length == 0) 
        return;
    if (elementClassName == className) {
        element.className = "";
        return;
    }
    if (elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
        element.className = elementClassName.replace((new RegExp("(^|\\s)" + className + "(\\s|$)")), " "); 
}


module.exports = {
    add:add
};