michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: "use strict";
michael@0: 
michael@0: const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
michael@0: 
michael@0: Cu.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: Cu.import("resource://gre/modules/Services.jsm");
michael@0: Cu.import("resource://gre/modules/Prompt.jsm");
michael@0: Cu.import("resource://gre/modules/Messaging.jsm");
michael@0: 
michael@0: XPCOMUtils.defineLazyGetter(this, "ContentAreaUtils", function() {
michael@0:   let ContentAreaUtils = {};
michael@0:   Services.scriptloader.loadSubScript("chrome://global/content/contentAreaUtils.js", ContentAreaUtils);
michael@0:   return ContentAreaUtils;
michael@0: });
michael@0: 
michael@0: this.EXPORTED_SYMBOLS = ["App","HelperApps"];
michael@0: 
michael@0: function App(data) {
michael@0:   this.name = data.name;
michael@0:   this.isDefault = data.isDefault;
michael@0:   this.packageName = data.packageName;
michael@0:   this.activityName = data.activityName;
michael@0:   this.iconUri = "-moz-icon://" + data.packageName;
michael@0: }
michael@0: 
michael@0: App.prototype = {
michael@0:   // callback will be null if a result is not requested
michael@0:   launch: function(uri, callback) {
michael@0:     HelperApps._launchApp(this, uri, callback);
michael@0:     return false;
michael@0:   }
michael@0: }
michael@0: 
michael@0: var HelperApps =  {
michael@0:   get defaultBrowsers() {
michael@0:     delete this.defaultBrowsers;
michael@0:     this.defaultBrowsers = this._getHandlers("http://www.example.com", {
michael@0:       filterBrowsers: false,
michael@0:       filterHtml: false
michael@0:     });
michael@0:     return this.defaultBrowsers;
michael@0:   },
michael@0: 
michael@0:   // Finds handlers that have registered for text/html pages or urls ending in html. Some apps, like
michael@0:   // the Samsung Video player will only appear for these urls, while some Browsers (like Link Bubble)
michael@0:   // won't register here because of the text/html mime type.
michael@0:   get defaultHtmlHandlers() {
michael@0:     delete this.defaultHtmlHandlers;
michael@0:     return this.defaultHtmlHandlers = this._getHandlers("http://www.example.com/index.html", {
michael@0:       filterBrowsers: false,
michael@0:       filterHtml: false
michael@0:     });
michael@0:   },
michael@0: 
michael@0:   _getHandlers: function(url, options) {
michael@0:     let values = {};
michael@0: 
michael@0:     let handlers = this.getAppsForUri(Services.io.newURI(url, null, null), options);
michael@0:     handlers.forEach(function(app) {
michael@0:       values[app.name] = app;
michael@0:     }, this);
michael@0: 
michael@0:     return values;
michael@0:   },
michael@0: 
michael@0:   get protoSvc() {
michael@0:     delete this.protoSvc;
michael@0:     return this.protoSvc = Cc["@mozilla.org/uriloader/external-protocol-service;1"].getService(Ci.nsIExternalProtocolService);
michael@0:   },
michael@0: 
michael@0:   get urlHandlerService() {
michael@0:     delete this.urlHandlerService;
michael@0:     return this.urlHandlerService = Cc["@mozilla.org/uriloader/external-url-handler-service;1"].getService(Ci.nsIExternalURLHandlerService);
michael@0:   },
michael@0: 
michael@0:   prompt: function showPicker(apps, promptOptions, callback) {
michael@0:     let p = new Prompt(promptOptions).addIconGrid({ items: apps });
michael@0:     p.show(callback);
michael@0:   },
michael@0: 
michael@0:   getAppsForProtocol: function getAppsForProtocol(scheme) {
michael@0:     let protoHandlers = this.protoSvc.getProtocolHandlerInfoFromOS(scheme, {}).possibleApplicationHandlers;
michael@0: 
michael@0:     let results = {};
michael@0:     for (let i = 0; i < protoHandlers.length; i++) {
michael@0:       try {
michael@0:         let protoApp = protoHandlers.queryElementAt(i, Ci.nsIHandlerApp);
michael@0:         results[protoApp.name] = new App({
michael@0:           name: protoApp.name,
michael@0:           description: protoApp.detailedDescription,
michael@0:         });
michael@0:       } catch(e) {}
michael@0:     }
michael@0: 
michael@0:     return results;
michael@0:   },
michael@0: 
michael@0:   getAppsForUri: function getAppsForUri(uri, flags = { }, callback) {
michael@0:     flags.filterBrowsers = "filterBrowsers" in flags ? flags.filterBrowsers : true;
michael@0:     flags.filterHtml = "filterHtml" in flags ? flags.filterHtml : true;
michael@0: 
michael@0:     // Query for apps that can/can't handle the mimetype
michael@0:     let msg = this._getMessage("Intent:GetHandlers", uri, flags);
michael@0:     let parseData = (d) => {
michael@0:       let apps = []
michael@0: 
michael@0:       if (!d)
michael@0:         return apps;
michael@0: 
michael@0:       apps = this._parseApps(d.apps);
michael@0: 
michael@0:       if (flags.filterBrowsers) {
michael@0:         apps = apps.filter((app) => {
michael@0:           return app.name && !this.defaultBrowsers[app.name];
michael@0:         });
michael@0:       }
michael@0: 
michael@0:       // Some apps will register for html files (the Samsung Video player) but should be shown
michael@0:       // for non-HTML files (like videos). This filters them only if the page has an htm of html
michael@0:       // file extension.
michael@0:       if (flags.filterHtml) {
michael@0:         // Matches from the first '.' to the end of the string, '?', or '#'
michael@0:         let ext = /\.([^\?#]*)/.exec(uri.path);
michael@0:         if (ext && (ext[1] === "html" || ext[1] === "htm")) {
michael@0:           apps = apps.filter(function(app) {
michael@0:             return app.name && !this.defaultHtmlHandlers[app.name];
michael@0:           }, this);
michael@0:         }
michael@0:       }
michael@0: 
michael@0:       return apps;
michael@0:     };
michael@0: 
michael@0:     if (!callback) {
michael@0:       let data = this._sendMessageSync(msg);
michael@0:       if (!data)
michael@0:         return [];
michael@0:       return parseData(data);
michael@0:     } else {
michael@0:       sendMessageToJava(msg, function(data) {
michael@0:         callback(parseData(data));
michael@0:       });
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   launchUri: function launchUri(uri) {
michael@0:     let msg = this._getMessage("Intent:Open", uri);
michael@0:     sendMessageToJava(msg);
michael@0:   },
michael@0: 
michael@0:   _parseApps: function _parseApps(appInfo) {
michael@0:     // appInfo -> {apps: [app1Label, app1Default, app1PackageName, app1ActivityName, app2Label, app2Defaut, ...]}
michael@0:     // see GeckoAppShell.java getHandlersForIntent function for details
michael@0:     const numAttr = 4; // 4 elements per ResolveInfo: label, default, package name, activity name.
michael@0: 
michael@0:     let apps = [];
michael@0:     for (let i = 0; i < appInfo.length; i += numAttr) {
michael@0:       apps.push(new App({"name" : appInfo[i],
michael@0:                  "isDefault" : appInfo[i+1],
michael@0:                  "packageName" : appInfo[i+2],
michael@0:                  "activityName" : appInfo[i+3]}));
michael@0:     }
michael@0: 
michael@0:     return apps;
michael@0:   },
michael@0: 
michael@0:   _getMessage: function(type, uri, options = {}) {
michael@0:     let mimeType = options.mimeType;
michael@0:     if (uri && mimeType == undefined)
michael@0:       mimeType = ContentAreaUtils.getMIMETypeForURI(uri) || "";
michael@0:       
michael@0:     return {
michael@0:       type: type,
michael@0:       mime: mimeType,
michael@0:       action: options.action || "", // empty action string defaults to android.intent.action.VIEW
michael@0:       url: uri ? uri.spec : "",
michael@0:       packageName: options.packageName || "",
michael@0:       className: options.className || ""
michael@0:     };
michael@0:   },
michael@0: 
michael@0:   _launchApp: function launchApp(app, uri, callback) {
michael@0:     if (callback) {
michael@0:         let msg = this._getMessage("Intent:OpenForResult", uri, {
michael@0:             packageName: app.packageName,
michael@0:             className: app.activityName
michael@0:         });
michael@0: 
michael@0:         sendMessageToJava(msg, function(data) {
michael@0:             callback(data);
michael@0:         });
michael@0:     } else {
michael@0:         let msg = this._getMessage("Intent:Open", uri, {
michael@0:             packageName: app.packageName,
michael@0:             className: app.activityName
michael@0:         });
michael@0: 
michael@0:         sendMessageToJava(msg);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _sendMessageSync: function(msg) {
michael@0:     let res = null;
michael@0:     sendMessageToJava(msg, function(data) {
michael@0:       res = data;
michael@0:     });
michael@0: 
michael@0:     let thread = Services.tm.currentThread;
michael@0:     while (res == null)
michael@0:       thread.processNextEvent(true);
michael@0: 
michael@0:     return res;
michael@0:   },
michael@0: };