ltre.js/function/inject.js

Personal Javascript Libs Store

//注入支持
function inject(obj, map){
    //map: key, onStart:{callback, args}, onEnd:{callback, args}
    for (var i in obj) {
        if (i in map) {
            var _hook = obj[i];
            var startCb = typeof map[i].onStart.callback == "function" ? map[i].onStart.callback : function(){};
            var endCb = typeof map[i].onEnd.callback == "function" ? map[i].onEnd.callback : function(){};
            var startCbArgs = map[i].onStart.args || [];
            var endCbArgs = map[i].onEnd.args || [];
            ~function(_hook, startCb, endCb, startCbArgs, endCbArgs){
                obj[i] = function(){
                    startCb.apply(this, startCbArgs);
                    _hook.apply(this, arguments);
                    endCb.apply(this, endCbArgs);
                };                
            }(_hook, startCb, endCb, startCbArgs, endCbArgs);
        }
    }
}

//实例
function Example(){
    this.sb = function(a, b){
        alert(a + b);
    };
    this.hehe = function(){
        alert('null');
    };
}

var j = new Example();
inject(j, {
    sb:{
        onStart:{
            callback:function(a,b){
                alert(a+b)
            },
            args:[1,2]
        },
        onEnd:{
            callback:function(c,d){
                alert(c+d)
            },
            args:[3,4]
        }
    }, 
    hehe:{
        onStart:{
            callback:function(e,f){
                alert(e+f)
            },
            args:[5,6]
        },
        onEnd:{
            callback:function(g,h){
                alert(g+h)
            },
            args:[7,8]
        }
    }
});

//测试
j.sb(8,9);
j.hehe(5,5);