ext-base.js

当前比较流行的,漂亮的JS框架,这里面用到的API文档

            {
                o = this.createXhrObject(tId);
                if (o) {
                    this.transactionId++;
                }
            }
            catch(e) {
            }
            finally
            {
                return o;
            }
        },

        asyncRequest:function(method, uri, callback, postData)
        {
            var o = this.getConnectionObject();

            if (!o) {
                return null;
            }
            else {
                o.conn.open(method, uri, true);

                if (this.useDefaultXhrHeader) {
                    if (!this.defaultHeaders['X-Requested-With']) {
                        this.initHeader('X-Requested-With', this.defaultXhrHeader, true);
                    }
                }

                if(postData && this.useDefaultHeader){
                    this.initHeader('Content-Type', this.defaultPostHeader);
                }

                 if (this.hasDefaultHeaders || this.hasHeaders) {
                    this.setHeader(o);
                }

                this.handleReadyState(o, callback);
                o.conn.send(postData || null);

                return o;
            }
        },

        handleReadyState:function(o, callback)
        {
            var oConn = this;

            if (callback && callback.timeout) {
                this.timeout[o.tId] = window.setTimeout(function() {
                    oConn.abort(o, callback, true);
                }, callback.timeout);
            }

            this.poll[o.tId] = window.setInterval(
                    function() {
                        if (o.conn && o.conn.readyState == 4) {
                            window.clearInterval(oConn.poll[o.tId]);
                            delete oConn.poll[o.tId];

                            if (callback && callback.timeout) {
                                window.clearTimeout(oConn.timeout[o.tId]);
                                delete oConn.timeout[o.tId];
                            }

                            oConn.handleTransactionResponse(o, callback);
                        }
                    }
                    , this.pollInterval);
        },

        handleTransactionResponse:function(o, callback, isAbort)
        {

            if (!callback) {
                this.releaseObject(o);
                return;
            }

            var httpStatus, responseObject;

            try
            {
                if (o.conn.status !== undefined && o.conn.status != 0) {
                    httpStatus = o.conn.status;
                }
                else {
                    httpStatus = 13030;
                }
            }
            catch(e) {


                httpStatus = 13030;
            }

            if (httpStatus >= 200 && httpStatus < 300) {
                responseObject = this.createResponseObject(o, callback.argument);
                if (callback.success) {
                    if (!callback.scope) {
                        callback.success(responseObject);
                    }
                    else {


                        callback.success.apply(callback.scope, [responseObject]);
                    }
                }
            }
            else {
                switch (httpStatus) {

                    case 12002:
                    case 12029:
                    case 12030:
                    case 12031:
                    case 12152:
                    case 13030:
                        responseObject = this.createExceptionObject(o.tId, callback.argument, (isAbort ? isAbort : false));
                        if (callback.failure) {
                            if (!callback.scope) {
                                callback.failure(responseObject);
                            }
                            else {
                                callback.failure.apply(callback.scope, [responseObject]);
                            }
                        }
                        break;
                    default:
                        responseObject = this.createResponseObject(o, callback.argument);
                        if (callback.failure) {
                            if (!callback.scope) {
                                callback.failure(responseObject);
                            }
                            else {
                                callback.failure.apply(callback.scope, [responseObject]);
                            }
                        }
                }
            }

            this.releaseObject(o);
            responseObject = null;
        },

        createResponseObject:function(o, callbackArg)
        {
            var obj = {};
            var headerObj = {};

            try
            {
                var headerStr = o.conn.getAllResponseHeaders();
                var header = headerStr.split('\n');
                for (var i = 0; i < header.length; i++) {
                    var delimitPos = header[i].indexOf(':');
                    if (delimitPos != -1) {
                        headerObj[header[i].substring(0, delimitPos)] = header[i].substring(delimitPos + 2);
                    }
                }
            }
            catch(e) {
            }

            obj.tId = o.tId;
            obj.status = o.conn.status;
            obj.statusText = o.conn.statusText;
            obj.getResponseHeader = headerObj;
            obj.getAllResponseHeaders = headerStr;
            obj.responseText = o.conn.responseText;
            obj.responseXML = o.conn.responseXML;

            if (typeof callbackArg !== undefined) {
                obj.argument = callbackArg;
            }

            return obj;
        },

        createExceptionObject:function(tId, callbackArg, isAbort)
        {
            var COMM_CODE = 0;
            var COMM_ERROR = 'communication failure';
            var ABORT_CODE = -1;
            var ABORT_ERROR = 'transaction aborted';

            var obj = {};

            obj.tId = tId;
            if (isAbort) {
                obj.status = ABORT_CODE;
                obj.statusText = ABORT_ERROR;
            }
            else {
                obj.status = COMM_CODE;
                obj.statusText = COMM_ERROR;
            }

            if (callbackArg) {
                obj.argument = callbackArg;
            }

            return obj;
        },

        initHeader:function(label, value, isDefault)
        {
            var headerObj = (isDefault) ? this.defaultHeaders : this.headers;

            if (headerObj[label] === undefined) {
                headerObj[label] = value;
            }
            else {


                headerObj[label] = value + "," + headerObj[label];
            }

            if (isDefault) {
                this.hasDefaultHeaders = true;
            }
            else {
                this.hasHeaders = true;
            }
        },


        setHeader:function(o)
        {
            if (this.hasDefaultHeaders) {
                for (var prop in this.defaultHeaders) {
                    if (this.defaultHeaders.hasOwnProperty(prop)) {
                        o.conn.setRequestHeader(prop, this.defaultHeaders[prop]);
                    }
                }
            }

            if (this.hasHeaders) {
                for (var prop in this.headers) {
                    if (this.headers.hasOwnProperty(prop)) {
                        o.conn.setRequestHeader(prop, this.headers[prop]);
                    }
                }
                this.headers = {};
                this.hasHeaders = false;
            }
        },

        resetDefaultHeaders:function() {
            delete this.defaultHeaders;
            this.defaultHeaders = {};
            this.hasDefaultHeaders = false;
        },

        abort:function(o, callback, isTimeout)
        {
            if (this.isCallInProgress(o)) {
                o.conn.abort();
                window.clearInterval(this.poll[o.tId]);
                delete this.poll[o.tId];
                if (isTimeout) {
                    delete this.timeout[o.tId];
                }

                this.handleTransactionResponse(o, callback, true);

                return true;
            }
            else {
                return false;
            }
        },


        isCallInProgress:function(o)
        {


            if (o.conn) {
                return o.conn.readyState != 4 && o.conn.readyState != 0;
            }
            else {

                return false;
            }
        },


        releaseObject:function(o)
        {

            o.conn = null;

            o = null;
        },

        activeX:[
        'MSXML2.XMLHTTP.3.0',
        'MSXML2.XMLHTTP',
        'Microsoft.XMLHTTP'
        ]


    };


    Ext.lib.Region = function(t, r, b, l) {
        this.top = t;
        this[1] = t;
        this.right = r;
        this.bottom = b;
        this.left = l;
        this[0] = l;
    };

    Ext.lib.Region.prototype = {
        contains : function(region) {
            return ( region.left >= this.left &&
                     region.right <= this.right &&
                     region.top >= this.top &&
                     region.bottom <= this.bottom    );

        },

        getArea : function() {
            return ( (this.bottom - this.top) * (this.right - this.left) );
        },

        intersect : function(region) {
            var t = Math.max(this.top, region.top);
            var r = Math.min(this.right, region.right);
            var b = Math.min(this.bottom, region.bottom);
            var l = Math.max(this.left, region.left);

            if (b >= t && r >= l) {
                return new Ext.lib.Region(t, r, b, l);
            } else {
                return null;
            }
        },
        union : function(region) {
            var t = Math.min(this.top, region.top);
            var r = Math.max(this.right, region.right);
            var b = Math.max(this.bottom, region.bottom);
            var l = Math.min(this.left, region.left);

            return new Ext.lib.Region(t, r, b, l);
        },

        constrainTo : function(r) {
            this.top = this.top.constrain(r.top, r.bottom);
            this.bottom = this.bottom.constrain(r.top, r.bottom);
            this.left = this.left.constrain(r.left, r.right);
            this.right = this.right.constrain(r.left, r.right);
            return this;
        },

        adjust : function(t, l, b, r) {
            this.top += t;
            this.left += l;
            this.right += r;
            this.bottom += b;
            return this;
        }
    };

    Ext.lib.Region.getRegion = function(el) {
        var p = Ext.lib.Dom.getXY(el);

        var t = p[1];
        var r = p[0] + el.offsetWidth;
        var b = p[1] + el.offsetHeight;
        var l = p[0];

        return new Ext.lib.Region(t, r, b, l);
    };

    Ext.lib.Point = function(x, y) {
        if (Ext.isArray(x)) {
            y = x[1];
            x = x[0];
        }
        this.x = this.right = this.left = this[0] = x;
        this.y = this.top = this.bottom = this[1] = y;
    };

    Ext.lib.Point.prototype = new Ext.lib.Region();


    Ext.lib.Anim = {
        scroll : function(el, args, duration, easing, cb, scope) {
            return this.run(el, args, duration, easing, cb, scope, Ext.lib.Scroll);
        },

        motion : function(el, args, duration, easing, cb, scope) {
            return this.run(el, args, duration, easing, cb, scope, Ext.lib.Motion);
        },

        color : function(el, args, duration, easing, cb, scope) {
            return this.run(el, args, duration, easing, cb, scope, Ext.lib.ColorAnim);
        },

        run : function(el, args, duration, easing, cb, scope, type) {
            type = type || Ext.lib.AnimBase;
            if (typeof easing == "string") {
                easing = Ext.lib.Easing[easing];
            }
            var anim = new type(el, args, duration, easing);
            anim.animateX(function() {
                Ext.callback(cb, scope);
            });
            return anim;
        }
    };


    function fly(el) {
        if (!libFlyweight) {
            libFlyweight = new Ext.Element.Flyweight();
        }
        libFlyweight.dom = el;
        return libFlyweight;
    }


    if(Ext.isIE) {
        function fnCleanUp() {
            var p = Function.prototype;