618 lines
18 KiB
JavaScript
618 lines
18 KiB
JavaScript
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dojo.provide("dojox.off.ui");
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dojo.require("dojox.storage.Provider");
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dojo.require("dojox.storage.manager");
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dojo.require("dojox.storage.GearsStorageProvider");
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// Author: Brad Neuberg, bkn3@columbia.edu, http://codinginparadise.org
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// summary:
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// dojox.off.ui provides a standard,
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// default user-interface for a
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// Dojo Offline Widget that can easily
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// be dropped into applications that would
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// like to work offline.
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dojo.mixin(dojox.off.ui, {
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// appName: String
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// This application's name, such as "Foobar". Note that
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// this is a string, not HTML, so embedded markup will
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// not work, including entities. Only the following
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// characters are allowed: numbers, letters, and spaces.
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// You must set this property.
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appName: "setme",
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// autoEmbed: boolean
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// For advanced usage; most developers can ignore this.
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// Whether to automatically auto-embed the default Dojo Offline
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// widget into this page; default is true.
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autoEmbed: true,
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// autoEmbedID: String
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// For advanced usage; most developers can ignore this.
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// The ID of the DOM element that will contain our
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// Dojo Offline widget; defaults to the ID 'dot-widget'.
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autoEmbedID: "dot-widget",
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// runLink: String
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// For advanced usage; most developers can ignore this.
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// The URL that should be navigated to to run this
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// application offline; this will be placed inside of a
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// link that the user can drag to their desktop and double
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// click. Note that this URL must exactly match the URL
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// of the main page of our resource that is offline for
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// it to be retrieved from the offline cache correctly.
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// For example, if you have cached your main page as
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// http://foobar.com/index.html, and you set this to
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// http://www.foobar.com/index.html, the run link will
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// not work. By default this value is automatically set to
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// the URL of this page, so it does not need to be set
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// manually unless you have unusual needs.
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runLink: window.location.href,
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// runLinkTitle: String
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// For advanced usage; most developers can ignore this.
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// The text that will be inside of the link that a user
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// can drag to their desktop to run this application offline.
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// By default this is automatically set to "Run " plus your
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// application's name.
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runLinkTitle: "Run Application",
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// learnHowPath: String
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// For advanced usage; most developers can ignore this.
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// The path to a web page that has information on
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// how to use this web app offline; defaults to
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// src/off/ui-template/learnhow.html, relative to
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// your Dojo installation. Make sure to set
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// dojo.to.ui.customLearnHowPath to true if you want
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// a custom Learn How page.
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learnHowPath: dojo.moduleUrl("dojox", "off/resources/learnhow.html"),
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// customLearnHowPath: boolean
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// For advanced usage; most developers can ignore this.
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// Whether the developer is using their own custom page
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// for the Learn How instructional page; defaults to false.
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// Use in conjunction with dojox.off.ui.learnHowPath.
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customLearnHowPath: false,
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htmlTemplatePath: dojo.moduleUrl("dojox", "off/resources/offline-widget.html").uri,
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cssTemplatePath: dojo.moduleUrl("dojox", "off/resources/offline-widget.css").uri,
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onlineImagePath: dojo.moduleUrl("dojox", "off/resources/greenball.png").uri,
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offlineImagePath: dojo.moduleUrl("dojox", "off/resources/redball.png").uri,
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rollerImagePath: dojo.moduleUrl("dojox", "off/resources/roller.gif").uri,
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checkmarkImagePath: dojo.moduleUrl("dojox", "off/resources/checkmark.png").uri,
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learnHowJSPath: dojo.moduleUrl("dojox", "off/resources/learnhow.js").uri,
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_initialized: false,
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onLoad: function(){
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// summary:
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// A function that should be connected to allow your
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// application to know when Dojo Offline, the page, and
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// the Offline Widget are all initialized and ready to be
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// used:
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//
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// dojo.connect(dojox.off.ui, "onLoad", someFunc)
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},
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_initialize: function(){
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//console.debug("dojox.off.ui._initialize");
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// make sure our app name is correct
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if(this._validateAppName(this.appName) == false){
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alert("You must set dojox.off.ui.appName; it can only contain "
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+ "letters, numbers, and spaces; right now it "
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+ "is incorrectly set to '" + dojox.off.ui.appName + "'");
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dojox.off.enabled = false;
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return;
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}
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// set our run link text to its default
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this.runLinkText = "Run " + this.appName;
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// setup our event listeners for Dojo Offline events
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// to update our UI
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dojo.connect(dojox.off, "onNetwork", this, "_onNetwork");
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dojo.connect(dojox.off.sync, "onSync", this, "_onSync");
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// cache our default UI resources
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dojox.off.files.cache([
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this.htmlTemplatePath,
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this.cssTemplatePath,
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this.onlineImagePath,
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this.offlineImagePath,
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this.rollerImagePath,
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this.checkmarkImagePath
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]);
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// embed the offline widget UI
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if(this.autoEmbed){
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this._doAutoEmbed();
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}
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},
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_doAutoEmbed: function(){
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// fetch our HTML for the offline widget
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// dispatch the request
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dojo.xhrGet({
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url: this.htmlTemplatePath,
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handleAs: "text",
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error: function(err){
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dojox.off.enabled = false;
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err = err.message||err;
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alert("Error loading the Dojo Offline Widget from "
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+ this.htmlTemplatePath + ": " + err);
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},
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load: dojo.hitch(this, this._templateLoaded)
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});
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},
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_templateLoaded: function(data){
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//console.debug("dojox.off.ui._templateLoaded");
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// inline our HTML
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var container = dojo.byId(this.autoEmbedID);
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if(container){ container.innerHTML = data; }
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// fill out our image paths
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this._initImages();
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// update our network indicator status ball
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this._updateNetIndicator();
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// update our 'Learn How' text
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this._initLearnHow();
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this._initialized = true;
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// check offline cache settings
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if(!dojox.off.hasOfflineCache){
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this._showNeedsOfflineCache();
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return;
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}
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// check to see if we need a browser restart
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// to be able to use this web app offline
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if(dojox.off.hasOfflineCache && dojox.off.browserRestart){
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this._needsBrowserRestart();
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return;
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}else{
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var browserRestart = dojo.byId("dot-widget-browser-restart");
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if(browserRestart){ browserRestart.style.display = "none"; }
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}
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// update our sync UI
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this._updateSyncUI();
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// register our event listeners for our main buttons
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this._initMainEvtHandlers();
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// if offline functionality is disabled, disable everything
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this._setOfflineEnabled(dojox.off.enabled);
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// update our UI based on the state of the network
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this._onNetwork(dojox.off.isOnline ? "online" : "offline");
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// try to go online
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this._testNet();
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},
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_testNet: function(){
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dojox.off.goOnline(dojo.hitch(this, function(isOnline){
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//console.debug("testNet callback, isOnline="+isOnline);
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// display our online/offline results
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this._onNetwork(isOnline ? "online" : "offline");
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// indicate that our default UI
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// and Dojo Offline are now ready to
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// be used
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this.onLoad();
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}));
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},
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_updateNetIndicator: function(){
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var onlineImg = dojo.byId("dot-widget-network-indicator-online");
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var offlineImg = dojo.byId("dot-widget-network-indicator-offline");
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var titleText = dojo.byId("dot-widget-title-text");
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if(onlineImg && offlineImg){
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if(dojox.off.isOnline == true){
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onlineImg.style.display = "inline";
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offlineImg.style.display = "none";
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}else{
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onlineImg.style.display = "none";
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offlineImg.style.display = "inline";
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}
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}
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if(titleText){
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if(dojox.off.isOnline){
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titleText.innerHTML = "Online";
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}else{
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titleText.innerHTML = "Offline";
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}
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}
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},
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_initLearnHow: function(){
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var learnHow = dojo.byId("dot-widget-learn-how-link");
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if(!learnHow){ return; }
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if(!this.customLearnHowPath){
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// add parameters to URL so the Learn How page
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// can customize itself and display itself
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// correctly based on framework settings
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var dojoPath = dojo.config.baseRelativePath;
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this.learnHowPath += "?appName=" + encodeURIComponent(this.appName)
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+ "&hasOfflineCache=" + dojox.off.hasOfflineCache
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+ "&runLink=" + encodeURIComponent(this.runLink)
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+ "&runLinkText=" + encodeURIComponent(this.runLinkText)
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+ "&baseRelativePath=" + encodeURIComponent(dojoPath);
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// cache our Learn How JavaScript page and
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// the HTML version with full query parameters
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// so it is available offline without a cache miss
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dojox.off.files.cache(this.learnHowJSPath);
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dojox.off.files.cache(this.learnHowPath);
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}
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learnHow.setAttribute("href", this.learnHowPath);
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var appName = dojo.byId("dot-widget-learn-how-app-name");
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if(!appName){ return; }
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appName.innerHTML = "";
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appName.appendChild(document.createTextNode(this.appName));
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},
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_validateAppName: function(appName){
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if(!appName){ return false; }
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return (/^[a-z0-9 ]*$/i.test(appName));
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},
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_updateSyncUI: function(){
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var roller = dojo.byId("dot-roller");
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var checkmark = dojo.byId("dot-success-checkmark");
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var syncMessages = dojo.byId("dot-sync-messages");
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var details = dojo.byId("dot-sync-details");
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var cancel = dojo.byId("dot-sync-cancel");
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if(dojox.off.sync.isSyncing){
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this._clearSyncMessage();
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if(roller){ roller.style.display = "inline"; }
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if(checkmark){ checkmark.style.display = "none"; }
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if(syncMessages){
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dojo.removeClass(syncMessages, "dot-sync-error");
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}
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if(details){ details.style.display = "none"; }
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if(cancel){ cancel.style.display = "inline"; }
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}else{
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if(roller){ roller.style.display = "none"; }
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if(cancel){ cancel.style.display = "none"; }
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if(syncMessages){
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dojo.removeClass(syncMessages, "dot-sync-error");
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}
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}
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},
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_setSyncMessage: function(message){
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var syncMessage = dojo.byId("dot-sync-messages");
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if(syncMessage){
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// when used with Google Gears pre-release in Firefox/Mac OS X,
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// the browser would crash when testing in Moxie
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// if we set the message this way for some reason.
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// Brad Neuberg, bkn3@columbia.edu
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//syncMessage.innerHTML = message;
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while(syncMessage.firstChild){
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syncMessage.removeChild(syncMessage.firstChild);
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}
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syncMessage.appendChild(document.createTextNode(message));
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}
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},
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_clearSyncMessage: function(){
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this._setSyncMessage("");
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},
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_initImages: function(){
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var onlineImg = dojo.byId("dot-widget-network-indicator-online");
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if(onlineImg){
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onlineImg.setAttribute("src", this.onlineImagePath);
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}
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var offlineImg = dojo.byId("dot-widget-network-indicator-offline");
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if(offlineImg){
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offlineImg.setAttribute("src", this.offlineImagePath);
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}
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var roller = dojo.byId("dot-roller");
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if(roller){
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roller.setAttribute("src", this.rollerImagePath);
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}
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var checkmark = dojo.byId("dot-success-checkmark");
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if(checkmark){
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checkmark.setAttribute("src", this.checkmarkImagePath);
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}
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},
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_showDetails: function(evt){
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// cancel the button's default behavior
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evt.preventDefault();
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evt.stopPropagation();
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if(!dojox.off.sync.details.length){
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return;
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}
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// determine our HTML message to display
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var html = "";
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html += "<html><head><title>Sync Details</title><head><body>";
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html += "<h1>Sync Details</h1>\n";
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html += "<ul>\n";
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for(var i = 0; i < dojox.off.sync.details.length; i++){
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html += "<li>";
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html += dojox.off.sync.details[i];
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html += "</li>";
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}
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html += "</ul>\n";
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html += "<a href='javascript:window.close()' "
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+ "style='text-align: right; padding-right: 2em;'>"
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+ "Close Window"
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+ "</a>\n";
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html += "</body></html>";
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|
||
|
|
// open a popup window with this message
|
||
|
|
var windowParams = "height=400,width=600,resizable=true,"
|
||
|
|
+ "scrollbars=true,toolbar=no,menubar=no,"
|
||
|
|
+ "location=no,directories=no,dependent=yes";
|
||
|
|
|
||
|
|
var popup = window.open("", "SyncDetails", windowParams);
|
||
|
|
|
||
|
|
if(!popup){ // aggressive popup blocker
|
||
|
|
alert("Please allow popup windows for this domain; can't display sync details window");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
popup.document.open();
|
||
|
|
popup.document.write(html);
|
||
|
|
popup.document.close();
|
||
|
|
|
||
|
|
// put the focus on the popup window
|
||
|
|
if(popup.focus){
|
||
|
|
popup.focus();
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_cancel: function(evt){
|
||
|
|
// cancel the button's default behavior
|
||
|
|
evt.preventDefault();
|
||
|
|
evt.stopPropagation();
|
||
|
|
|
||
|
|
dojox.off.sync.cancel();
|
||
|
|
},
|
||
|
|
|
||
|
|
_needsBrowserRestart: function(){
|
||
|
|
var browserRestart = dojo.byId("dot-widget-browser-restart");
|
||
|
|
if(browserRestart){
|
||
|
|
dojo.addClass(browserRestart, "dot-needs-browser-restart");
|
||
|
|
}
|
||
|
|
|
||
|
|
var appName = dojo.byId("dot-widget-browser-restart-app-name");
|
||
|
|
if(appName){
|
||
|
|
appName.innerHTML = "";
|
||
|
|
appName.appendChild(document.createTextNode(this.appName));
|
||
|
|
}
|
||
|
|
|
||
|
|
var status = dojo.byId("dot-sync-status");
|
||
|
|
if(status){
|
||
|
|
status.style.display = "none";
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_showNeedsOfflineCache: function(){
|
||
|
|
var widgetContainer = dojo.byId("dot-widget-container");
|
||
|
|
if(widgetContainer){
|
||
|
|
dojo.addClass(widgetContainer, "dot-needs-offline-cache");
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_hideNeedsOfflineCache: function(){
|
||
|
|
var widgetContainer = dojo.byId("dot-widget-container");
|
||
|
|
if(widgetContainer){
|
||
|
|
dojo.removeClass(widgetContainer, "dot-needs-offline-cache");
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_initMainEvtHandlers: function(){
|
||
|
|
var detailsButton = dojo.byId("dot-sync-details-button");
|
||
|
|
if(detailsButton){
|
||
|
|
dojo.connect(detailsButton, "onclick", this, this._showDetails);
|
||
|
|
}
|
||
|
|
var cancelButton = dojo.byId("dot-sync-cancel-button");
|
||
|
|
if(cancelButton){
|
||
|
|
dojo.connect(cancelButton, "onclick", this, this._cancel);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_setOfflineEnabled: function(enabled){
|
||
|
|
var elems = [];
|
||
|
|
elems.push(dojo.byId("dot-sync-status"));
|
||
|
|
|
||
|
|
for(var i = 0; i < elems.length; i++){
|
||
|
|
if(elems[i]){
|
||
|
|
elems[i].style.visibility =
|
||
|
|
(enabled ? "visible" : "hidden");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_syncFinished: function(){
|
||
|
|
this._updateSyncUI();
|
||
|
|
|
||
|
|
var checkmark = dojo.byId("dot-success-checkmark");
|
||
|
|
var details = dojo.byId("dot-sync-details");
|
||
|
|
|
||
|
|
if(dojox.off.sync.successful == true){
|
||
|
|
this._setSyncMessage("Sync Successful");
|
||
|
|
if(checkmark){ checkmark.style.display = "inline"; }
|
||
|
|
}else if(dojox.off.sync.cancelled == true){
|
||
|
|
this._setSyncMessage("Sync Cancelled");
|
||
|
|
|
||
|
|
if(checkmark){ checkmark.style.display = "none"; }
|
||
|
|
}else{
|
||
|
|
this._setSyncMessage("Sync Error");
|
||
|
|
|
||
|
|
var messages = dojo.byId("dot-sync-messages");
|
||
|
|
if(messages){
|
||
|
|
dojo.addClass(messages, "dot-sync-error");
|
||
|
|
}
|
||
|
|
|
||
|
|
if(checkmark){ checkmark.style.display = "none"; }
|
||
|
|
}
|
||
|
|
|
||
|
|
if(dojox.off.sync.details.length && details){
|
||
|
|
details.style.display = "inline";
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_onFrameworkEvent: function(type, saveData){
|
||
|
|
if(type == "save"){
|
||
|
|
if(saveData.status == dojox.storage.FAILED && !saveData.isCoreSave){
|
||
|
|
alert("Please increase the amount of local storage available "
|
||
|
|
+ "to this application");
|
||
|
|
if(dojox.storage.hasSettingsUI()){
|
||
|
|
dojox.storage.showSettingsUI();
|
||
|
|
}
|
||
|
|
|
||
|
|
// FIXME: Be able to know if storage size has changed
|
||
|
|
// due to user configuration
|
||
|
|
}
|
||
|
|
}else if(type == "coreOperationFailed"){
|
||
|
|
console.log("Application does not have permission to use Dojo Offline");
|
||
|
|
|
||
|
|
if(!this._userInformed){
|
||
|
|
alert("This application will not work if Google Gears is not allowed to run");
|
||
|
|
this._userInformed = true;
|
||
|
|
}
|
||
|
|
}else if(type == "offlineCacheInstalled"){
|
||
|
|
// clear out the 'needs offline cache' info
|
||
|
|
this._hideNeedsOfflineCache();
|
||
|
|
|
||
|
|
// check to see if we need a browser restart
|
||
|
|
// to be able to use this web app offline
|
||
|
|
if(dojox.off.hasOfflineCache == true
|
||
|
|
&& dojox.off.browserRestart == true){
|
||
|
|
this._needsBrowserRestart();
|
||
|
|
return;
|
||
|
|
}else{
|
||
|
|
var browserRestart = dojo.byId("dot-widget-browser-restart");
|
||
|
|
if(browserRestart){
|
||
|
|
browserRestart.style.display = "none";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// update our sync UI
|
||
|
|
this._updateSyncUI();
|
||
|
|
|
||
|
|
// register our event listeners for our main buttons
|
||
|
|
this._initMainEvtHandlers();
|
||
|
|
|
||
|
|
// if offline is disabled, disable everything
|
||
|
|
this._setOfflineEnabled(dojox.off.enabled);
|
||
|
|
|
||
|
|
// try to go online
|
||
|
|
this._testNet();
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_onSync: function(type){
|
||
|
|
//console.debug("ui, onSync="+type);
|
||
|
|
switch(type){
|
||
|
|
case "start":
|
||
|
|
this._updateSyncUI();
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "refreshFiles":
|
||
|
|
this._setSyncMessage("Downloading UI...");
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "upload":
|
||
|
|
this._setSyncMessage("Uploading new data...");
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "download":
|
||
|
|
this._setSyncMessage("Downloading new data...");
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "finished":
|
||
|
|
this._syncFinished();
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "cancel":
|
||
|
|
this._setSyncMessage("Canceling Sync...");
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
dojo.warn("Programming error: "
|
||
|
|
+ "Unknown sync type in dojox.off.ui: " + type);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_onNetwork: function(type){
|
||
|
|
// summary:
|
||
|
|
// Called when we go on- or off-line
|
||
|
|
// description:
|
||
|
|
// When we go online or offline, this method is called to update
|
||
|
|
// our UI. Default behavior is to update the Offline
|
||
|
|
// Widget UI and to attempt a synchronization.
|
||
|
|
// type: String
|
||
|
|
// "online" if we just moved online, and "offline" if we just
|
||
|
|
// moved offline.
|
||
|
|
|
||
|
|
if(!this._initialized){ return; }
|
||
|
|
|
||
|
|
// update UI
|
||
|
|
this._updateNetIndicator();
|
||
|
|
|
||
|
|
if(type == "offline"){
|
||
|
|
this._setSyncMessage("You are working offline");
|
||
|
|
|
||
|
|
// clear old details
|
||
|
|
var details = dojo.byId("dot-sync-details");
|
||
|
|
if(details){ details.style.display = "none"; }
|
||
|
|
|
||
|
|
// if we fell offline during a sync, hide
|
||
|
|
// the sync info
|
||
|
|
this._updateSyncUI();
|
||
|
|
}else{ // online
|
||
|
|
// synchronize, but pause for a few seconds
|
||
|
|
// so that the user can orient themselves
|
||
|
|
if(dojox.off.sync.autoSync){
|
||
|
|
if(dojo.isAIR){
|
||
|
|
window.setTimeout(function(){dojox.off.sync.synchronize();}, 1000);
|
||
|
|
}else{
|
||
|
|
window.setTimeout(dojox._scopeName + ".off.sync.synchronize()", 1000);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
// register ourselves for low-level framework events
|
||
|
|
dojo.connect(dojox.off, "onFrameworkEvent", dojox.off.ui, "_onFrameworkEvent");
|
||
|
|
|
||
|
|
// start our magic when the Dojo Offline framework is ready to go
|
||
|
|
dojo.connect(dojox.off, "onLoad", dojox.off.ui, dojox.off.ui._initialize);
|