ext-core-debug.js

ajax最新框架extjs

        var e = this.events[eventName];
        return typeof e == "object" && e.listeners.length > 0;
    },

    
    suspendEvents : function(){
        this.eventsSuspended = true;
    },

    
    resumeEvents : function(){
        this.eventsSuspended = false;
    },

    // these are considered experimental
    // allows for easier interceptor and sequences, including cancelling and overwriting the return value of the call
    // private
    getMethodEvent : function(method){
        if(!this.methodEvents){
            this.methodEvents = {};
        }
        var e = this.methodEvents[method];
        if(!e){
            e = {};
            this.methodEvents[method] = e;

            e.originalFn = this[method];
            e.methodName = method;
            e.before = [];
            e.after = [];


            var returnValue, v, cancel;
            var obj = this;

            var makeCall = function(fn, scope, args){
                if((v = fn.apply(scope || obj, args)) !== undefined){
                    if(typeof v === 'object'){
                        if(v.returnValue !== undefined){
                            returnValue = v.returnValue;
                        }else{
                            returnValue = v;
                        }
                        if(v.cancel === true){
                            cancel = true;
                        }
                    }else if(v === false){
                        cancel = true;
                    }else {
                        returnValue = v;
                    }
                }
            }

            this[method] = function(){
                returnValue = v = undefined; cancel = false;
                var args = Array.prototype.slice.call(arguments, 0);
                for(var i = 0, len = e.before.length; i < len; i++){
                    makeCall(e.before[i].fn, e.before[i].scope, args);
                    if(cancel){
                        return returnValue;
                    }
                }

                if((v = e.originalFn.apply(obj, args)) !== undefined){
                    returnValue = v;
                }

                for(var i = 0, len = e.after.length; i < len; i++){
                    makeCall(e.after[i].fn, e.after[i].scope, args);
                    if(cancel){
                        return returnValue;
                    }
                }
                return returnValue;
            };
        }
        return e;
    },

    // adds an "interceptor" called before the original method
    beforeMethod : function(method, fn, scope){
        var e = this.getMethodEvent(method);
        e.before.push({fn: fn, scope: scope});
    },

    // adds a "sequence" called after the original method
    afterMethod : function(method, fn, scope){
        var e = this.getMethodEvent(method);
        e.after.push({fn: fn, scope: scope});
    },

    removeMethodListener : function(method, fn, scope){
        var e = this.getMethodEvent(method);
        for(var i = 0, len = e.before.length; i < len; i++){
            if(e.before[i].fn == fn && e.before[i].scope == scope){
                e.before.splice(i, 1);
                return;
            }
        }
        for(var i = 0, len = e.after.length; i < len; i++){
            if(e.after[i].fn == fn && e.after[i].scope == scope){
                e.after.splice(i, 1);
                return;
            }
        }
    }
};

Ext.util.Observable.prototype.on = Ext.util.Observable.prototype.addListener;

Ext.util.Observable.prototype.un = Ext.util.Observable.prototype.removeListener;


Ext.util.Observable.capture = function(o, fn, scope){
    o.fireEvent = o.fireEvent.createInterceptor(fn, scope);
};


Ext.util.Observable.releaseCapture = function(o){
    o.fireEvent = Ext.util.Observable.prototype.fireEvent;
};

(function(){

    var createBuffered = function(h, o, scope){
        var task = new Ext.util.DelayedTask();
        return function(){
            task.delay(o.buffer, h, scope, Array.prototype.slice.call(arguments, 0));
        };
    };

    var createSingle = function(h, e, fn, scope){
        return function(){
            e.removeListener(fn, scope);
            return h.apply(scope, arguments);
        };
    };

    var createDelayed = function(h, o, scope){
        return function(){
            var args = Array.prototype.slice.call(arguments, 0);
            setTimeout(function(){
                h.apply(scope, args);
            }, o.delay || 10);
        };
    };

    Ext.util.Event = function(obj, name){
        this.name = name;
        this.obj = obj;
        this.listeners = [];
    };

    Ext.util.Event.prototype = {
        addListener : function(fn, scope, options){
            scope = scope || this.obj;
            if(!this.isListening(fn, scope)){
                var l = this.createListener(fn, scope, options);
                if(!this.firing){
                    this.listeners.push(l);
                }else{ // if we are currently firing this event, don't disturb the listener loop
                    this.listeners = this.listeners.slice(0);
                    this.listeners.push(l);
                }
            }
        },

        createListener : function(fn, scope, o){
            o = o || {};
            scope = scope || this.obj;
            var l = {fn: fn, scope: scope, options: o};
            var h = fn;
            if(o.delay){
                h = createDelayed(h, o, scope);
            }
            if(o.single){
                h = createSingle(h, this, fn, scope);
            }
            if(o.buffer){
                h = createBuffered(h, o, scope);
            }
            l.fireFn = h;
            return l;
        },

        findListener : function(fn, scope){
            scope = scope || this.obj;
            var ls = this.listeners;
            for(var i = 0, len = ls.length; i < len; i++){
                var l = ls[i];
                if(l.fn == fn && l.scope == scope){
                    return i;
                }
            }
            return -1;
        },

        isListening : function(fn, scope){
            return this.findListener(fn, scope) != -1;
        },

        removeListener : function(fn, scope){
            var index;
            if((index = this.findListener(fn, scope)) != -1){
                if(!this.firing){
                    this.listeners.splice(index, 1);
                }else{
                    this.listeners = this.listeners.slice(0);
                    this.listeners.splice(index, 1);
                }
                return true;
            }
            return false;
        },

        clearListeners : function(){
            this.listeners = [];
        },

        fire : function(){
            var ls = this.listeners, scope, len = ls.length;
            if(len > 0){
                this.firing = true;
                var args = Array.prototype.slice.call(arguments, 0);
                for(var i = 0; i < len; i++){
                    var l = ls[i];
                    if(l.fireFn.apply(l.scope||this.obj||window, arguments) === false){
                        this.firing = false;
                        return false;
                    }
                }
                this.firing = false;
            }
            return true;
        }
    };
})();

Ext.EventManager = function(){
    var docReadyEvent, docReadyProcId, docReadyState = false;
    var resizeEvent, resizeTask, textEvent, textSize;
    var E = Ext.lib.Event;
    var D = Ext.lib.Dom;
    // fix parser confusion
    var xname = 'Ex' + 't';

    var elHash = {};

    var addListener = function(el, ename, fn, wrap, scope){
        var id = Ext.id(el);
        if(!elHash[id]){
            elHash[id] = {};
        }
        var es = elHash[id];
        if(!es[ename]){
            es[ename] = [];
        }
        var ls = es[ename];
        ls.push({
            id: id,
            ename: ename,
            fn: fn,
            wrap: wrap,
            scope: scope
        });

         E.on(el, ename, wrap);

        if(ename == "mousewheel" && el.addEventListener){ // workaround for jQuery
            el.addEventListener("DOMMouseScroll", wrap, false);
            E.on(window, 'unload', function(){
                el.removeEventListener("DOMMouseScroll", wrap, false);
            });
        }
        if(ename == "mousedown" && el == document){ // fix stopped mousedowns on the document
            Ext.EventManager.stoppedMouseDownEvent.addListener(wrap);
        }
    }

    var removeListener = function(el, ename, fn, scope){
        el = Ext.getDom(el);

        var id = Ext.id(el), es = elHash[id], wrap;
        if(es){
            var ls = es[ename], l;
            if(ls){
                for(var i = 0, len = ls.length; i < len; i++){
                    l = ls[i];
                    if(l.fn == fn && (!scope || l.scope == scope)){
                        wrap = l.wrap;
                        E.un(el, ename, wrap);
                        ls.splice(i, 1);
                        break;
                    }
                }
            }
        }
        if(ename == "mousewheel" && el.addEventListener && wrap){
            el.removeEventListener("DOMMouseScroll", wrap, false);
        }
        if(ename == "mousedown" && el == document && wrap){ // fix stopped mousedowns on the document
            Ext.EventManager.stoppedMouseDownEvent.removeListener(wrap);
        }
    }

    var removeAll = function(el){
        el = Ext.getDom(el);
        var id = Ext.id(el), es = elHash[id], ls;
        if(es){
            for(var ename in es){
                if(es.hasOwnProperty(ename)){
                    ls = es[ename];
                    for(var i = 0, len = ls.length; i < len; i++){
                        E.un(el, ename, ls[i].wrap);
                        ls[i] = null;
                    }
                }
                es[ename] = null;
            }
            delete elHash[id];
        }
    }


    var fireDocReady = function(){
        if(!docReadyState){
            docReadyState = true;
            Ext.isReady = true;
            if(docReadyProcId){
                clearInterval(docReadyProcId);
            }
            if(Ext.isGecko || Ext.isOpera) {
                document.removeEventListener("DOMContentLoaded", fireDocReady, false);
            }
            if(Ext.isIE){
                var defer = document.getElementById("ie-deferred-loader");
                if(defer){
                    defer.onreadystatechange = null;
                    defer.parentNode.removeChild(defer);
                }
            }
            if(docReadyEvent){
                docReadyEvent.fire();
                docReadyEvent.clearListeners();
            }
        }
    };

    var initDocReady = function(){
        docReadyEvent = new Ext.util.Event();
        if(Ext.isGecko || Ext.isOpera) {
            document.addEventListener("DOMContentLoaded", fireDocReady, false);
        }else if(Ext.isIE){
            document.write("<s"+'cript id="ie-deferred-loader" defer="defer" src="/'+'/:"></s'+"cript>");
            var defer = document.getElementById("ie-deferred-loader");
            defer.onreadystatechange = function(){
                if(this.readyState == "complete"){
                    fireDocReady();
                }
            };
        }else if(Ext.isSafari){
            docReadyProcId = setInterval(function(){
                var rs = document.readyState;
                if(rs == "complete") {
                    fireDocReady();
                 }
            }, 10);
        }
        // no matter what, make sure it fires on load
        E.on(window, "load", fireDocReady);
    };

    var createBuffered = function(h, o){
        var task = new Ext.util.DelayedTask(h);
        return function(e){
            // create new event object impl so new events don't wipe out properties
            e = new Ext.EventObjectImpl(e);
            task.delay(o.buffer, h, null, [e]);
        };
    };

    var createSingle = function(h, el, ename, fn, scope){
        return function(e){
            Ext.EventManager.removeListener(el, ename, fn, scope);
            h(e);
        };
    };

    var createDelayed = function(h, o){
        return function(e){
            // create new event object impl so new events don't wipe out properties
            e = new Ext.EventObjectImpl(e);
            setTimeout(function(){
                h(e);
            }, o.delay || 10);
        };
    };

    var listen = function(element, ename, opt, fn, scope){
        var o = (!opt || typeof opt == "boolean") ? {} : opt;
        fn = fn || o.fn; scope = scope || o.scope;
        var el = Ext.getDom(element);
        if(!el){
            throw "Error listening for \"" + ename + '\". Element "' + element + '" doesn\'t exist.';
        }
        var h = function(e){
            // prevent errors while unload occurring
            if(!window[xname]){
                return;
            }
            e = Ext.EventObject.setEvent(e);
            var t;
            if(o.delegate){
                t = e.getTarget(o.delegate, el);
                if(!t){
                    return;
                }
            }else{
                t = e.target;
            }
            if(o.stopEvent === true){
                e.stopEvent();
            }
            if(o.preventDefault === true){
               e.preventDefault();
            }
            if(o.stopPropagation === true){
                e.stopPropagation();