_common.js

用最近的dojo1.2.1制作前端的ajax购书网站

/*
	Copyright (c) 2004-2008, The Dojo Foundation All Rights Reserved.
	Available via Academic Free License >= 2.1 OR the modified BSD license.
	see: http://dojotoolkit.org/license for details
*/


if(!dojo._hasResource["dojox.off._common"]){
dojo._hasResource["dojox.off._common"]=true;
dojo.provide("dojox.off._common");
dojo.require("dojo.gears");
dojo.require("dojox.storage");
dojo.require("dojox.sql");
dojo.require("dojox.off.sync");
dojo.mixin(dojox.off,{isOnline:false,NET_CHECK:5,STORAGE_NAMESPACE:"_dot",enabled:true,availabilityURL:dojo.moduleUrl("dojox","off/network_check.txt"),goingOnline:false,coreOpFailed:false,doNetChecking:true,hasOfflineCache:null,browserRestart:false,_STORAGE_APP_NAME:window.location.href.replace(/[^0-9A-Za-z_]/g,"_"),_initializeCalled:false,_storageLoaded:false,_pageLoaded:false,onLoad:function(){
},onNetwork:function(_1){
},initialize:function(){
this._initializeCalled=true;
if(this._storageLoaded&&this._pageLoaded){
this._onLoad();
}
},goOffline:function(){
if((dojox.off.sync.isSyncing)||(this.goingOnline)){
return;
}
this.goingOnline=false;
this.isOnline=false;
},goOnline:function(_2){
if(dojox.off.sync.isSyncing||dojox.off.goingOnline){
return;
}
this.goingOnline=true;
this.isOnline=false;
this._isSiteAvailable(_2);
},onFrameworkEvent:function(_3,_4){
if(_3=="save"){
if(_4.isCoreSave&&(_4.status==dojox.storage.FAILED)){
dojox.off.coreOpFailed=true;
dojox.off.enabled=false;
dojox.off.onFrameworkEvent("coreOperationFailed");
}
}else{
if(_3=="coreOperationFailed"){
dojox.off.coreOpFailed=true;
dojox.off.enabled=false;
}
}
},_checkOfflineCacheAvailable:function(_5){
this.hasOfflineCache=dojo.gears.available;
_5();
},_onLoad:function(){
dojox.off.files.cache(dojo.moduleUrl("dojo","dojo.js"));
this._cacheDojoResources();
dojox.off.files.cache(dojox.storage.manager.getResourceList());
dojox.off.files._slurp();
this._checkOfflineCacheAvailable(dojo.hitch(this,"_onOfflineCacheChecked"));
},_onOfflineCacheChecked:function(){
if(this.hasOfflineCache&&this.enabled){
this._load(dojo.hitch(this,"_finishStartingUp"));
}else{
if(this.hasOfflineCache&&!this.enabled){
this._finishStartingUp();
}else{
this._keepCheckingUntilInstalled();
}
}
},_keepCheckingUntilInstalled:function(){
this._finishStartingUp();
},_finishStartingUp:function(){
if(!this.hasOfflineCache){
this.onLoad();
}else{
if(this.enabled){
this._startNetworkThread();
this.goOnline(dojo.hitch(this,function(){
dojox.off.onLoad();
}));
}else{
if(this.coreOpFailed){
this.onFrameworkEvent("coreOperationFailed");
}else{
this.onLoad();
}
}
}
},_onPageLoad:function(){
this._pageLoaded=true;
if(this._storageLoaded&&this._initializeCalled){
this._onLoad();
}
},_onStorageLoad:function(){
this._storageLoaded=true;
if(!dojox.storage.manager.isAvailable()&&dojox.storage.manager.isInitialized()){
this.coreOpFailed=true;
this.enabled=false;
}
if(this._pageLoaded&&this._initializeCalled){
this._onLoad();
}
},_isSiteAvailable:function(_6){
dojo.xhrGet({url:this._getAvailabilityURL(),handleAs:"text",timeout:this.NET_CHECK*1000,error:dojo.hitch(this,function(_7){
this.goingOnline=false;
this.isOnline=false;
if(_6){
_6(false);
}
}),load:dojo.hitch(this,function(_8){
this.goingOnline=false;
this.isOnline=true;
if(_6){
_6(true);
}else{
this.onNetwork("online");
}
})});
},_startNetworkThread:function(){
if(!this.doNetChecking){
return;
}
window.setInterval(dojo.hitch(this,function(){
var d=dojo.xhrGet({url:this._getAvailabilityURL(),handleAs:"text",timeout:this.NET_CHECK*1000,error:dojo.hitch(this,function(_a){
if(this.isOnline){
this.isOnline=false;
try{
if(typeof d.ioArgs.xhr.abort=="function"){
d.ioArgs.xhr.abort();
}
}
catch(e){
}
dojox.off.sync.isSyncing=false;
this.onNetwork("offline");
}
}),load:dojo.hitch(this,function(_b){
if(!this.isOnline){
this.isOnline=true;
this.onNetwork("online");
}
})});
}),this.NET_CHECK*1000);
},_getAvailabilityURL:function(){
var _c=this.availabilityURL.toString();
if(_c.indexOf("?")==-1){
_c+="?";
}else{
_c+="&";
}
_c+="browserbust="+new Date().getTime();
return _c;
},_onOfflineCacheInstalled:function(){
this.onFrameworkEvent("offlineCacheInstalled");
},_cacheDojoResources:function(){
var _d=true;
dojo.forEach(dojo.query("script"),function(i){
var _f=i.getAttribute("src");
if(!_f){
return;
}
if(_f.indexOf("_base/_loader/bootstrap.js")!=-1){
_d=false;
}
});
if(!_d){
dojox.off.files.cache(dojo.moduleUrl("dojo","_base.js").uri);
dojox.off.files.cache(dojo.moduleUrl("dojo","_base/_loader/loader.js").uri);
dojox.off.files.cache(dojo.moduleUrl("dojo","_base/_loader/bootstrap.js").uri);
dojox.off.files.cache(dojo.moduleUrl("dojo","_base/_loader/hostenv_browser.js").uri);
}
for(var i=0;i<dojo._loadedUrls.length;i++){
dojox.off.files.cache(dojo._loadedUrls[i]);
}
},_save:function(){
},_load:function(_11){
dojox.off.sync._load(_11);
}});
dojox.storage.manager.addOnLoad(dojo.hitch(dojox.off,"_onStorageLoad"));
dojo.addOnLoad(dojox.off,"_onPageLoad");
}