nuijs/core/events.js

nui框架

Nui.define(['./extends'], function(){
    return function(opts){
        var self = this, that = opts || self,
            constr = that.constructor,
            isComponent = constr && constr.__component_name,
            elem = self.element || that.element || Nui.doc, 
            events = isComponent ? that._events : that.events;
        if(!elem || !events){
            return that
        }

        if(typeof events === 'function'){
            events = events.call(that)
        }

        if(!(elem instanceof jQuery)){
            elem = jQuery(elem)
        }

        var evt, ele, ret;
        var callback = function(e, elem, cbs){
            if(typeof cbs === 'function'){
                cbs.call(that, e, elem);
            }
            else{
                var _cb, _that;
                Nui.each(cbs, function(cb, i){
                    if(typeof (_cb = that[cb]) === 'function'){
                        _that = that;
                    }
                    else if(typeof (_cb = self[cb]) === 'function'){
                        _that = self;
                    }
                    if(_that){
                        return ret = _cb.call(_that, e, elem, ret);
                    }
                })
            }
        }

        Nui.each(events, function(cbs, evts){
            if(cbs && (typeof cbs === 'string' || typeof cbs === 'function')){
                if(typeof cbs === 'string'){
                    cbs = Nui.trim(cbs).split(/\s+/);
                }
                evts = Nui.trim(evts).split(/\s+/);
                // keyup:kupdown:focus a => elem.on('keyup kupdown focus', 'a', callback)
                evt = evts.shift().replace(/:/g, ' ');
                ele = evts.join(' ');
                //组件内部处理
                if(isComponent){
                    that._on(evt, elem, ele, function(e, elem){
                        callback(e, elem, cbs)
                    })
                }
                else{
                    elem.on(evt, ele, function(e){
                        callback(e, jQuery(this), cbs)
                    })
                }
            }
        })
        return that
    }
})