pref-offlineapps.js

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/* 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 {DownloadUtils} = ChromeUtils.import("resource://gre/modules/DownloadUtils.jsm");

function Startup()

  OfflineAppsObserver.init();

  let always = document.getElementById("offline-apps.allow_by_default").value;

  UpdateNotifyBox(always);

var OfflineAppsObserver = {

  init: function offlineAppsInit() {

    this.update();

    Services.obs.addObserver(this, "perm-changed");

    window.addEventListener("unload", this);

},

  update: function offlineAppsUpdate() {

    UpdateActualCacheSize();

    UpdateOfflineApps();

},

  observe: function offlineAppsObserve(aSubject, aTopic, aData) {

    if (aTopic == "perm-changed")

      this.update();

},

  handleEvent: function offlineAppsEvent(aEvent) {

    if (aEvent.type == "unload") {

      window.removeEventListener("unload", this);

      Services.obs.removeObserver(this, "perm-changed");

function UpdateActualCacheSize()

  var visitor = {

    onCacheStorageInfo: function(aEntryCount, aTotalSize)

      let actualSizeLabel = document.getElementById("offlineAppSizeInfo");

      let sizeStrings = DownloadUtils.convertByteUnits(aTotalSize);

      let bundle = document.getElementById("bundle_prefutilities");

      let sizeStr = bundle.getFormattedString("offlineAppSizeInfo",

                                              sizeStrings);

      actualSizeLabel.textContent = sizeStr;

},

    onCacheEntryInfo: function(entryInfo)

},

    onCacheEntryVisitCompleted: function()

};

  Services.cache2.appCacheStorage(Services.loadContextInfo.default, null)

                 .asyncVisitStorage(visitor, false);

/**

 * Clears the application cache.

*/

var callback = {

  onCacheEntryDoomed: function(aResult) {

    UpdateActualCacheSize();

    UpdateOfflineApps();

};

function ClearOfflineAppCache()

  try {

    Services.cache2.appCacheStorage(Services.loadContextInfo.default, null)

                   .asyncEvictStorage(callback);

  } catch(ex) {}

function UpdateNotifyBox(aValue)

  EnableElementById("offlineNotifyAsk", !aValue);

  // remove this once bug 934457 and bug 1024832 are fixed

  document.getElementById("offlineNotifyPermissions").disabled = aValue;

function _getOfflineAppUsage(aPermission)

  var appCache = Cc["@mozilla.org/network/application-cache-service;1"]

                   .getService(Ci.nsIApplicationCacheService);

  var groups = appCache.getGroups();

  var usage = 0;

  for (let i = 0; i < groups.length; i++) {

    let uri = Services.io.newURI(groups[i]);

    if (aPermission.matchesURI(uri, true))

      usage += appCache.getActiveCache(groups[i]).usage;

  return usage;

/**

 * Updates the list of offline applications.

*/

function UpdateOfflineApps()

  var list = document.getElementById("offlineAppsList");

  while (list.hasChildNodes())

    list.lastChild.remove();

  var bundle = document.getElementById("bundle_prefutilities");

  var pm = Services.perms;

  var enumerator = pm.enumerator;

  while (enumerator.hasMoreElements()) {

    let perm = enumerator.getNext()

                         .QueryInterface(Ci.nsIPermission);

    if (perm.type != "offline-app" ||

        perm.capability != pm.ALLOW_ACTION)

      continue;

    let usage = _getOfflineAppUsage(perm);

    let row = document.createElement("listitem");

    row.setAttribute("host", perm.principal.URI.host);

    let converted = DownloadUtils.convertByteUnits(usage);

    row.setAttribute("usage", bundle.getFormattedString("offlineAppUsage",

                                                        converted));

    list.appendChild(row);

function OfflineAppSelected(aList)

  document.getElementById("offlineAppsListRemove")

          .setAttribute("disabled", !aList.selectedItem);

function RemoveOfflineApp()

  var list = document.getElementById("offlineAppsList");

  var item = list.selectedItem;

  var host = item.getAttribute("host");

  var flags = Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_0 +

              Services.prompt.BUTTON_TITLE_CANCEL * Services.prompt.BUTTON_POS_1;

  var bundle = document.getElementById("bundle_prefutilities");

  var title = bundle.getString("offlineAppRemoveTitle");

  var prompt = bundle.getFormattedString("offlineAppRemovePrompt", [host]);

  var confirm = bundle.getString("offlineAppRemoveConfirm");

  if (Services.prompt.confirmEx(window, title, prompt, flags, confirm,

                                null, null, null, {}))

    return;

  // clear offline cache entries

  var appCache = Cc["@mozilla.org/network/application-cache-service;1"]

                   .getService(Ci.nsIApplicationCacheService);

  var groups = appCache.getGroups();

  for (let i = 0; i < groups.length; i++) {

      var uri = Services.io.newURI(groups[i]);

      if (uri.asciiHost == host)

          appCache.getActiveCache(groups[i]).discard();

  // remove the permission

  // Services.perms.remove(host, "offline-app");

  UpdateOfflineApps();

  OfflineAppSelected(list);

  UpdateActualCacheSize();