The Tor Browser: mobile/android/components/HelperAppDialog.js@6474c204b198 (annotated)

mobile/android/components/HelperAppDialog.js@6474c204b198 (annotated)

mobile/android/components/HelperAppDialog.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
 const APK_MIME_TYPE = "application/vnd.android.package-archive";
 const PREF_BD_USEDOWNLOADDIR = "browser.download.useDownloadDir";
 const URI_GENERIC_ICON_DOWNLOAD = "drawable://alert_download";
 Cu.import("resource://gre/modules/FileUtils.jsm");
 Cu.import("resource://gre/modules/HelperApps.jsm");
 Cu.import("resource://gre/modules/Prompt.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 // -----------------------------------------------------------------------
 // HelperApp Launcher Dialog
 // -----------------------------------------------------------------------
 function HelperAppLauncherDialog() { }
 HelperAppLauncherDialog.prototype = {
   classID: Components.ID("{e9d277a0-268a-4ec2-bb8c-10fdf3e44611}"),
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIHelperAppLauncherDialog]),
   getNativeWindow: function () {
     try {
       let win = Services.wm.getMostRecentWindow("navigator:browser");
       if (win && win.NativeWindow) {
         return win.NativeWindow;
       }
     } catch (e) {
     }
     return null;
   },
   /**
    * Returns false if `url` represents a local or special URL that we don't
    * wish to ever download.
    *
    * Returns true otherwise.
    */
   _canDownload: function (url, alreadyResolved=false) {
     // The common case.
     if (url.schemeIs("http") ||
         url.schemeIs("https") ||
         url.schemeIs("ftp")) {
       return true;
     }
     // The less-common opposite case.
     if (url.schemeIs("chrome") ||
         url.schemeIs("jar") ||
         url.schemeIs("resource") ||
         url.schemeIs("wyciwyg")) {
       return false;
     }
     // For all other URIs, try to resolve them to an inner URI, and check that.
     if (!alreadyResolved) {
       let ioSvc = Cc["@mozilla.org/network/io-service;1"].getService(Components.interfaces.nsIIOService);
       let innerURI = ioSvc.newChannelFromURI(url).URI;
       if (!url.equals(innerURI)) {
         return this._canDownload(innerURI, true);
       }
     }
     if (url.schemeIs("file")) {
       // If it's in our app directory or profile directory, we never ever
       // want to do anything with it, including saving to disk or passing the
       // file to another application.
       let file = url.QueryInterface(Ci.nsIFileURL).file;
       // Normalize the nsILocalFile in-place. This will ensure that paths
       // can be correctly compared via `contains`, below.
       file.normalize();
       // TODO: pref blacklist?
       let appRoot = FileUtils.getFile("XREExeF", []);
       if (appRoot.contains(file, true)) {
         return false;
       }
       let profileRoot = FileUtils.getFile("ProfD", []);
       if (profileRoot.contains(file, true)) {
         return false;
       }
       return true;
     }
     // Anything else is fine to download.
     return true;
   },
   /**
    * Returns true if `launcher` represents a download for which we wish
    * to prompt.
    */
   _shouldPrompt: function (launcher) {
     let mimeType = this._getMimeTypeFromLauncher(launcher);
     // Straight equality: nsIMIMEInfo normalizes.
     return APK_MIME_TYPE == mimeType;
   },
   show: function hald_show(aLauncher, aContext, aReason) {
     if (!this._canDownload(aLauncher.source)) {
       aLauncher.cancel(Cr.NS_BINDING_ABORTED);
       let win = this.getNativeWindow();
       if (!win) {
         // Oops.
         Services.console.logStringMessage("Refusing download, but can't show a toast.");
         return;
       }
       Services.console.logStringMessage("Refusing download of non-downloadable file.");
       let bundle = Services.strings.createBundle("chrome://browser/locale/handling.properties");
       let failedText = bundle.GetStringFromName("protocol.failed");
       win.toast.show(failedText, "long");
       return;
     }
     let bundle = Services.strings.createBundle("chrome://browser/locale/browser.properties");
     let defaultHandler = new Object();
     let apps = HelperApps.getAppsForUri(aLauncher.source, {
       mimeType: aLauncher.MIMEInfo.MIMEType,
     });
     // Add a fake intent for save to disk at the top of the list.
     apps.unshift({
       name: bundle.GetStringFromName("helperapps.saveToDisk"),
       packageName: "org.mozilla.gecko.Download",
       iconUri: "drawable://icon",
       launch: function() {
         // Reset the preferredAction here.
         aLauncher.MIMEInfo.preferredAction = Ci.nsIMIMEInfo.saveToDisk;
         aLauncher.saveToDisk(null, false);
         return true;
       }
     });
     // See if the user already marked something as the default for this mimetype,
     // and if that app is still installed.
     let preferredApp = this._getPreferredApp(aLauncher);
     if (preferredApp) {
       let pref = apps.filter(function(app) {
         return app.packageName === preferredApp;
       });
       if (pref.length > 0) {
         pref[0].launch(aLauncher.source);
         return;
       }
     }
     let callback = function(app) {
       aLauncher.MIMEInfo.preferredAction = Ci.nsIMIMEInfo.useHelperApp;
       if (!app.launch(aLauncher.source)) {
         aLauncher.cancel(Cr.NS_BINDING_ABORTED);
       }
     }
     // If there's only one choice, and we don't want to prompt, go right ahead
     // and choose that app automatically.
     if (!this._shouldPrompt(aLauncher) && (apps.length === 1)) {
       callback(apps[0]);
       return;
     }
     // Otherwise, let's go through the prompt.
     HelperApps.prompt(apps, {
       title: bundle.GetStringFromName("helperapps.pick"),
       buttons: [
         bundle.GetStringFromName("helperapps.alwaysUse"),
         bundle.GetStringFromName("helperapps.useJustOnce")
       ]
     }, (data) => {
       if (data.button < 0) {
         return;
       }
       callback(apps[data.icongrid0]);
       if (data.button === 0) {
         this._setPreferredApp(aLauncher, apps[data.icongrid0]);
       }
     });
   },
   _getPrefName: function getPrefName(mimetype) {
     return "browser.download.preferred." + mimetype.replace("\\", ".");
   },
   _getMimeTypeFromLauncher: function (launcher) {
     let mime = launcher.MIMEInfo.MIMEType;
     if (!mime)
       mime = ContentAreaUtils.getMIMETypeForURI(launcher.source) || "";
     return mime;
   },
   _getPreferredApp: function getPreferredApp(launcher) {
     let mime = this._getMimeTypeFromLauncher(launcher);
     if (!mime)
       return;
     try {
       return Services.prefs.getCharPref(this._getPrefName(mime));
     } catch(ex) {
       Services.console.logStringMessage("Error getting pref for " + mime + ".");
     }
     return null;
   },
   _setPreferredApp: function setPreferredApp(launcher, app) {
     let mime = this._getMimeTypeFromLauncher(launcher);
     if (!mime)
       return;
     if (app)
       Services.prefs.setCharPref(this._getPrefName(mime), app.packageName);
     else
       Services.prefs.clearUserPref(this._getPrefName(mime));
   },
   promptForSaveToFile: function hald_promptForSaveToFile(aLauncher, aContext, aDefaultFile, aSuggestedFileExt, aForcePrompt) {
     // Retrieve the user's default download directory
     let dnldMgr = Cc["@mozilla.org/download-manager;1"].getService(Ci.nsIDownloadManager);
     let defaultFolder = dnldMgr.userDownloadsDirectory;
     try {
       file = this.validateLeafName(defaultFolder, aDefaultFile, aSuggestedFileExt);
     } catch (e) { }
     return file;
   },
   validateLeafName: function hald_validateLeafName(aLocalFile, aLeafName, aFileExt) {
     if (!(aLocalFile && this.isUsableDirectory(aLocalFile)))
       return null;
     // Remove any leading periods, since we don't want to save hidden files
     // automatically.
     aLeafName = aLeafName.replace(/^\.+/, "");
     if (aLeafName == "")
       aLeafName = "unnamed" + (aFileExt ? "." + aFileExt : "");
     aLocalFile.append(aLeafName);
     this.makeFileUnique(aLocalFile);
     return aLocalFile;
   },
   makeFileUnique: function hald_makeFileUnique(aLocalFile) {
     try {
       // Note - this code is identical to that in
       //   toolkit/content/contentAreaUtils.js.
       // If you are updating this code, update that code too! We can't share code
       // here since this is called in a js component.
       let collisionCount = 0;
       while (aLocalFile.exists()) {
         collisionCount++;
         if (collisionCount == 1) {
           // Append "(2)" before the last dot in (or at the end of) the filename
           // special case .ext.gz etc files so we don't wind up with .tar(2).gz
           if (aLocalFile.leafName.match(/\.[^\.]{1,3}\.(gz|bz2|Z)$/i))
             aLocalFile.leafName = aLocalFile.leafName.replace(/\.[^\.]{1,3}\.(gz|bz2|Z)$/i, "(2)$&");
           else
             aLocalFile.leafName = aLocalFile.leafName.replace(/(\.[^\.]*)?$/, "(2)$&");
         }
         else {
           // replace the last (n) in the filename with (n+1)
           aLocalFile.leafName = aLocalFile.leafName.replace(/^(.*\()\d+\)/, "$1" + (collisionCount+1) + ")");
         }
       }
       aLocalFile.create(Ci.nsIFile.NORMAL_FILE_TYPE, 0600);
     }
     catch (e) {
       dump("*** exception in validateLeafName: " + e + "\n");
       if (e.result == Cr.NS_ERROR_FILE_ACCESS_DENIED)
         throw e;
       if (aLocalFile.leafName == "" || aLocalFile.isDirectory()) {
         aLocalFile.append("unnamed");
         if (aLocalFile.exists())
           aLocalFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0600);
       }
     }
   },
   isUsableDirectory: function hald_isUsableDirectory(aDirectory) {
     return aDirectory.exists() && aDirectory.isDirectory() && aDirectory.isWritable();
   },
 };
 this.NSGetFactory = XPCOMUtils.generateNSGetFactory([HelperAppLauncherDialog]);