The Tor Browser / file comparison
comparison: dom/apps/src/ScriptPreloader.jsm
dom/apps/src/ScriptPreloader.jsm
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:a2760c2fb231 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 "use strict"; | |
| 6 | |
| 7 const Cu = Components.utils; | |
| 8 const Ci = Components.interfaces; | |
| 9 | |
| 10 Cu.import("resource://gre/modules/XPCOMUtils.jsm"); | |
| 11 Cu.import("resource://gre/modules/Services.jsm"); | |
| 12 Cu.import("resource://gre/modules/Promise.jsm"); | |
| 13 | |
| 14 this.EXPORTED_SYMBOLS = ["ScriptPreloader"]; | |
| 15 | |
| 16 function debug(aMsg) { | |
| 17 //dump("--*-- ScriptPreloader: " + aMsg + "\n"); | |
| 18 } | |
| 19 | |
| 20 this.ScriptPreloader = { | |
| 21 #ifdef MOZ_B2G | |
| 22 _enabled: true, | |
| 23 #else | |
| 24 _enabled: false, | |
| 25 #endif | |
| 26 | |
| 27 preload: function(aApp, aManifest) { | |
| 28 debug("Preloading " + aApp.origin); | |
| 29 let deferred = Promise.defer(); | |
| 30 | |
| 31 if (!this._enabled) { | |
| 32 deferred.resolve(); | |
| 33 return deferred.promise; | |
| 34 } | |
| 35 | |
| 36 if (aManifest.precompile && | |
| 37 Array.isArray(aManifest.precompile) && | |
| 38 aManifest.precompile.length > 0) { | |
| 39 let origin = Services.io.newURI(aApp.origin, null, null); | |
| 40 let toLoad = aManifest.precompile.length; | |
| 41 let principal = | |
| 42 Services.scriptSecurityManager | |
| 43 .getAppCodebasePrincipal(origin, aApp.localId, false); | |
| 44 | |
| 45 aManifest.precompile.forEach((aPath) => { | |
| 46 let uri = Services.io.newURI(aPath, null, origin); | |
| 47 debug("Script to compile: " + uri.spec); | |
| 48 try { | |
| 49 Services.scriptloader.precompileScript(uri, principal, | |
| 50 (aSubject, aTopic, aData) => { | |
| 51 let uri = aSubject.QueryInterface(Ci.nsIURI); | |
| 52 debug("Done compiling " + uri.spec); | |
| 53 | |
| 54 toLoad--; | |
| 55 if (toLoad == 0) { | |
| 56 deferred.resolve(); | |
| 57 } | |
| 58 }); | |
| 59 } catch (e) { | |
| 60 // Resolve the promise if precompileScript throws. | |
| 61 deferred.resolve(); | |
| 62 } | |
| 63 }); | |
| 64 } else { | |
| 65 // The precompile field is not an array, let the developer know. | |
| 66 // We don't want to have to enable debug for that to show up. | |
| 67 if (aManifest.precompile) { | |
| 68 Cu.reportError("ASM.JS compilation failed: the 'precompile' manifest " + | |
| 69 "property should be an array of script uris.\n"); | |
| 70 } | |
| 71 deferred.resolve(); | |
| 72 } | |
| 73 | |
| 74 return deferred.promise; | |
| 75 } | |
| 76 } |
