b2g/components/ContentRequestHelper.jsm
author Mike Hommey <mh+mozilla@glandium.org>
Thu, 30 Oct 2014 13:06:12 +0900
changeset 213063 55d15b285436576e1c5979f753e433c50fd9db3a
parent 187425 8a38d3372bf2c525802e46ccd368abb60f04dc2f
permissions -rw-r--r--
Bug 1077148 part 4 - Add and use new moz.build templates for Gecko programs and libraries. r=gps There are, sadly, many combinations of linkage in use throughout the tree. The main differentiator, though, is between program/libraries related to Gecko or not. Kind of. Some need mozglue, some don't. Some need dependent linkage, some standalone. Anyways, these new templates remove the need to manually define the right dependencies against xpcomglue, nspr, mozalloc and mozglue in most cases. Places that build programs and were resetting MOZ_GLUE_PROGRAM_LDFLAGS or that build libraries and were resetting MOZ_GLUE_LDFLAGS can now just not use those Gecko-specific templates.

/* 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/. */

"use strict";

this.EXPORTED_SYMBOLS = ["ContentRequestHelper"];

const { interfaces: Ci, utils: Cu } = Components;

Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Promise.jsm");

XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
                                   "@mozilla.org/uuid-generator;1",
                                   "nsIUUIDGenerator");

XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
                                  "resource://gre/modules/SystemAppProxy.jsm");

function debug(msg) {
  // dump("ContentRequestHelper ** " + msg + "\n");
}

this.ContentRequestHelper = function() {
}

ContentRequestHelper.prototype = {

  contentRequest: function(aContentEventName, aChromeEventName,
                           aInternalEventName, aData) {
    let deferred = Promise.defer();

    let id = uuidgen.generateUUID().toString();

    SystemAppProxy.addEventListener(aContentEventName,
                                    function onContentEvent(result) {
      SystemAppProxy.removeEventListener(aContentEventName,
                                         onContentEvent);
      let msg = result.detail;
      if (!msg || !msg.id || msg.id != id) {
        deferred.reject("InternalErrorWrongContentEvent " +
                        JSON.stringify(msg));
        SystemAppProxy.removeEventListener(aContentEventName,
                                           onContentEvent);
        return;
      }

      debug("Got content event " + JSON.stringify(msg));

      if (msg.error) {
        deferred.reject(msg.error);
      } else {
        deferred.resolve(msg.result);
      }
    });

    let detail = {
       eventName: aInternalEventName,
       id: id,
       data: aData
    };
    debug("Send chrome event " + JSON.stringify(detail));
    SystemAppProxy._sendCustomEvent(aChromeEventName, detail);

    return deferred.promise;
  }
};