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@hongru
Created May 29, 2013 03:26
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function connect(scope, fnFrom, fnTo) {
"use strict"
var objFn = fnFrom.split('.');//处理传入的函数名
var deepth = objFn.length;
var scope = scope || window;
var j = deepth,i=j;
var _obj = scope,__obj=_obj ;
while (i > 0) {//以window.console.log为例,这里利用迭代最终拿到log
_obj = _obj[objFn[deepth - i]];
i -= 1;
};
var t = function () {
var ret = _obj.apply(this, arguments);//此时this指向console 注意console.log log函数上下文必须在console那里,否则会报错
fnTo.apply(this, arguments);
return ret;
}
while (j > 1) {//仍然利用迭代,找出window.console.log前一级window.console的引用
__obj = __obj[objFn[deepth - j]];
j -= 1;
}
__obj[objFn[deepth - 1]] = t;//覆盖window.console.log
}
function unconnect(scope,fn){
var objFn = fn.split('.');//处理传入的函数名
var deepth = objFn.length;
var scope = scope || window;
var j = deepth,i=j;
var _obj = scope;
while (i > 0) {//以window.console.log为例,这里利用迭代最终拿到log
_obj = _obj[objFn[deepth - i]];
i -= 1;
};
delete _obj
}
function publishConsole(inner){
document.write(inner)
}
//start
unconnect(window,'console.log')
connect(window,'console.log',publishConsole)
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