The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/dom/apps/src/ScriptPreloader.jsm	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,76 @@
     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 Cu = Components.utils;
    1.11 +const Ci = Components.interfaces;
    1.12 +
    1.13 +Cu.import("resource://gre/modules/XPCOMUtils.jsm");
    1.14 +Cu.import("resource://gre/modules/Services.jsm");
    1.15 +Cu.import("resource://gre/modules/Promise.jsm");
    1.16 +
    1.17 +this.EXPORTED_SYMBOLS = ["ScriptPreloader"];
    1.18 +
    1.19 +function debug(aMsg) {
    1.20 +  //dump("--*-- ScriptPreloader: " + aMsg + "\n");
    1.21 +}
    1.22 +
    1.23 +this.ScriptPreloader = {
    1.24 +#ifdef MOZ_B2G
    1.25 +  _enabled: true,
    1.26 +#else
    1.27 +  _enabled: false,
    1.28 +#endif
    1.29 +
    1.30 +  preload: function(aApp, aManifest) {
    1.31 +    debug("Preloading " + aApp.origin);
    1.32 +    let deferred = Promise.defer();
    1.33 +
    1.34 +    if (!this._enabled) {
    1.35 +      deferred.resolve();
    1.36 +      return deferred.promise;
    1.37 +    }
    1.38 +
    1.39 +    if (aManifest.precompile &&
    1.40 +        Array.isArray(aManifest.precompile) &&
    1.41 +        aManifest.precompile.length > 0) {
    1.42 +      let origin = Services.io.newURI(aApp.origin, null, null);
    1.43 +      let toLoad = aManifest.precompile.length;
    1.44 +      let principal =
    1.45 +        Services.scriptSecurityManager
    1.46 +                .getAppCodebasePrincipal(origin, aApp.localId, false);
    1.47 +
    1.48 +      aManifest.precompile.forEach((aPath) => {
    1.49 +        let uri = Services.io.newURI(aPath, null, origin);
    1.50 +        debug("Script to compile: " + uri.spec);
    1.51 +        try {
    1.52 +          Services.scriptloader.precompileScript(uri, principal,
    1.53 +            (aSubject, aTopic, aData) => {
    1.54 +              let uri = aSubject.QueryInterface(Ci.nsIURI);
    1.55 +              debug("Done compiling " + uri.spec);
    1.56 +
    1.57 +              toLoad--;
    1.58 +              if (toLoad == 0) {
    1.59 +                deferred.resolve();
    1.60 +              }
    1.61 +            });
    1.62 +        } catch (e) {
    1.63 +          // Resolve the promise if precompileScript throws.
    1.64 +          deferred.resolve();
    1.65 +        }
    1.66 +      });
    1.67 +    } else {
    1.68 +      // The precompile field is not an array, let the developer know.
    1.69 +      // We don't want to have to enable debug for that to show up.
    1.70 +      if (aManifest.precompile) {
    1.71 +        Cu.reportError("ASM.JS compilation failed: the 'precompile' manifest " +
    1.72 +                       "property should be an array of script uris.\n");
    1.73 +      }
    1.74 +      deferred.resolve();
    1.75 +    }
    1.76 +
    1.77 +    return deferred.promise;
    1.78 +  }
    1.79 +}