The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/dom/datastore/DataStoreChangeNotifier.jsm	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,132 @@
     1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
     1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.7 +
     1.8 +"use strict"
     1.9 +
    1.10 +const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
    1.11 +
    1.12 +this.EXPORTED_SYMBOLS = ["DataStoreChangeNotifier"];
    1.13 +
    1.14 +function debug(s) {
    1.15 +  //dump('DEBUG DataStoreChangeNotifier: ' + s + '\n');
    1.16 +}
    1.17 +
    1.18 +// DataStoreServiceInternal should not be converted into a lazy getter as it
    1.19 +// runs code during initialization.
    1.20 +Cu.import('resource://gre/modules/DataStoreServiceInternal.jsm');
    1.21 +Cu.import("resource://gre/modules/XPCOMUtils.jsm");
    1.22 +Cu.import("resource://gre/modules/Services.jsm");
    1.23 +
    1.24 +XPCOMUtils.defineLazyServiceGetter(this, "ppmm",
    1.25 +                                   "@mozilla.org/parentprocessmessagemanager;1",
    1.26 +                                   "nsIMessageBroadcaster");
    1.27 +
    1.28 +this.DataStoreChangeNotifier = {
    1.29 +  children: [],
    1.30 +  messages: [ "DataStore:Changed", "DataStore:RegisterForMessages",
    1.31 +              "DataStore:UnregisterForMessages",
    1.32 +              "child-process-shutdown" ],
    1.33 +
    1.34 +  init: function() {
    1.35 +    debug("init");
    1.36 +
    1.37 +    this.messages.forEach((function(msgName) {
    1.38 +      ppmm.addMessageListener(msgName, this);
    1.39 +    }).bind(this));
    1.40 +
    1.41 +    Services.obs.addObserver(this, 'xpcom-shutdown', false);
    1.42 +  },
    1.43 +
    1.44 +  observe: function(aSubject, aTopic, aData) {
    1.45 +    debug("observe");
    1.46 +
    1.47 +    switch (aTopic) {
    1.48 +      case 'xpcom-shutdown':
    1.49 +        this.messages.forEach((function(msgName) {
    1.50 +          ppmm.removeMessageListener(msgName, this);
    1.51 +        }).bind(this));
    1.52 +
    1.53 +        Services.obs.removeObserver(this, 'xpcom-shutdown');
    1.54 +        ppmm = null;
    1.55 +        break;
    1.56 +
    1.57 +      default:
    1.58 +        debug("Wrong observer topic: " + aTopic);
    1.59 +        break;
    1.60 +    }
    1.61 +  },
    1.62 +
    1.63 +  broadcastMessage: function broadcastMessage(aData) {
    1.64 +    debug("Broadast");
    1.65 +    this.children.forEach(function(obj) {
    1.66 +      if (obj.store == aData.store && obj.owner == aData.owner) {
    1.67 +        obj.mm.sendAsyncMessage("DataStore:Changed:Return:OK", aData);
    1.68 +      }
    1.69 +    });
    1.70 +  },
    1.71 +
    1.72 +
    1.73 +  receiveMessage: function(aMessage) {
    1.74 +    debug("receiveMessage");
    1.75 +
    1.76 +    // No check has to be done when the message is 'child-process-shutdown'
    1.77 +    // because at this point the target is already disconnected from
    1.78 +    // nsFrameMessageManager, so that assertAppHasStatus will always fail.
    1.79 +    let prefName = 'dom.testing.datastore_enabled_for_hosted_apps';
    1.80 +    if (aMessage.name != 'child-process-shutdown' &&
    1.81 +        (Services.prefs.getPrefType(prefName) == Services.prefs.PREF_INVALID ||
    1.82 +         !Services.prefs.getBoolPref(prefName)) &&
    1.83 +        !aMessage.target.assertAppHasStatus(Ci.nsIPrincipal.APP_STATUS_CERTIFIED)) {
    1.84 +      return;
    1.85 +    }
    1.86 +
    1.87 +    switch (aMessage.name) {
    1.88 +      case "DataStore:Changed":
    1.89 +        this.broadcastMessage(aMessage.data);
    1.90 +        break;
    1.91 +
    1.92 +      case "DataStore:RegisterForMessages":
    1.93 +        debug("Register!");
    1.94 +
    1.95 +        for (let i = 0; i < this.children.length; ++i) {
    1.96 +          if (this.children[i].mm == aMessage.target &&
    1.97 +              this.children[i].store == aMessage.data.store &&
    1.98 +              this.children[i].owner == aMessage.data.owner) {
    1.99 +            debug("Register on existing index: " + i);
   1.100 +            ++this.children[i].count;
   1.101 +            return;
   1.102 +          }
   1.103 +        }
   1.104 +
   1.105 +        this.children.push({ mm: aMessage.target,
   1.106 +                             store: aMessage.data.store,
   1.107 +                             owner: aMessage.data.owner,
   1.108 +                             count: 1 });
   1.109 +        break;
   1.110 +
   1.111 +      case "child-process-shutdown":
   1.112 +      case "DataStore:UnregisterForMessages":
   1.113 +        debug("Unregister");
   1.114 +
   1.115 +        for (let i = 0; i < this.children.length;) {
   1.116 +          if (this.children[i].mm == aMessage.target) {
   1.117 +            debug("Unregister index: " + i);
   1.118 +            if (!--this.children[i].count) {
   1.119 +              debug("Unregister delete index: " + i);
   1.120 +              this.children.splice(i, 1);
   1.121 +            }
   1.122 +            break;
   1.123 +          } else {
   1.124 +            ++i;
   1.125 +          }
   1.126 +        }
   1.127 +        break;
   1.128 +
   1.129 +      default:
   1.130 +        debug("Wrong message: " + aMessage.name);
   1.131 +    }
   1.132 +  }
   1.133 +}
   1.134 +
   1.135 +DataStoreChangeNotifier.init();