gecko/toolkit/devtools/Loader.jsm

415 lines
15 KiB
JavaScript

/* 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";
/**
* Manages the addon-sdk loader instance used to load the developer tools.
*/
let { Constructor: CC, classes: Cc, interfaces: Ci, utils: Cu } = Components;
// addDebuggerToGlobal only allows adding the Debugger object to a global. The
// this object is not guaranteed to be a global (in particular on B2G, due to
// compartment sharing), so add the Debugger object to a sandbox instead.
let sandbox = Cu.Sandbox(CC('@mozilla.org/systemprincipal;1', 'nsIPrincipal')());
Cu.evalInSandbox(
"Components.utils.import('resource://gre/modules/jsdebugger.jsm');" +
"addDebuggerToGlobal(this);",
sandbox
);
let Debugger = sandbox.Debugger;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "NetUtil", "resource://gre/modules/NetUtil.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "FileUtils", "resource://gre/modules/FileUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "OS", "resource://gre/modules/osfile.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "console", "resource://gre/modules/devtools/Console.jsm");
let xpcInspector = Cc["@mozilla.org/jsinspector;1"].getService(Ci.nsIJSInspector);
let loader = Cu.import("resource://gre/modules/commonjs/toolkit/loader.js", {}).Loader;
let promise = Cu.import("resource://gre/modules/Promise.jsm", {}).Promise;
this.EXPORTED_SYMBOLS = ["DevToolsLoader", "devtools", "BuiltinProvider",
"SrcdirProvider"];
/**
* Providers are different strategies for loading the devtools.
*/
let Timer = Cu.import("resource://gre/modules/Timer.jsm", {});
let loaderModules = {
"Debugger": Debugger,
"Services": Object.create(Services),
"Timer": Object.create(Timer),
"toolkit/loader": loader,
"xpcInspector": xpcInspector,
"promise": promise,
"PromiseDebugging": PromiseDebugging
};
try {
let { indexedDB } = Cu.Sandbox(this, {wantGlobalProperties:["indexedDB"]});
loaderModules.indexedDB = indexedDB;
} catch(e) {
// On xpcshell, we can't instantiate indexedDB without crashing
}
let sharedGlobalBlacklist = ["sdk/indexed-db"];
// Used when the tools should be loaded from the Firefox package itself (the default)
function BuiltinProvider() {}
BuiltinProvider.prototype = {
load: function() {
this.loader = new loader.Loader({
id: "fx-devtools",
modules: loaderModules,
paths: {
// When you add a line to this mapping, don't forget to make a
// corresponding addition to the SrcdirProvider mapping below as well.
"": "resource://gre/modules/commonjs/",
"main": "resource:///modules/devtools/main.js",
"devtools": "resource:///modules/devtools",
"devtools/toolkit": "resource://gre/modules/devtools",
"devtools/server": "resource://gre/modules/devtools/server",
"devtools/toolkit/webconsole": "resource://gre/modules/devtools/toolkit/webconsole",
"devtools/app-actor-front": "resource://gre/modules/devtools/app-actor-front.js",
"devtools/styleinspector/css-logic": "resource://gre/modules/devtools/styleinspector/css-logic",
"devtools/css-color": "resource://gre/modules/devtools/css-color",
"devtools/output-parser": "resource://gre/modules/devtools/output-parser",
"devtools/touch-events": "resource://gre/modules/devtools/touch-events",
"devtools/client": "resource://gre/modules/devtools/client",
"devtools/pretty-fast": "resource://gre/modules/devtools/pretty-fast.js",
"devtools/jsbeautify": "resource://gre/modules/devtools/jsbeautify/beautify.js",
"devtools/async-utils": "resource://gre/modules/devtools/async-utils",
"devtools/content-observer": "resource://gre/modules/devtools/content-observer",
"gcli": "resource://gre/modules/devtools/gcli",
"projecteditor": "resource:///modules/devtools/projecteditor",
"acorn": "resource://gre/modules/devtools/acorn",
"acorn/util/walk": "resource://gre/modules/devtools/acorn/walk.js",
"tern": "resource://gre/modules/devtools/tern",
"source-map": "resource://gre/modules/devtools/SourceMap.jsm",
// Allow access to xpcshell test items from the loader.
"xpcshell-test": "resource://test"
},
globals: this.globals,
invisibleToDebugger: this.invisibleToDebugger,
sharedGlobal: true,
sharedGlobalBlacklist: sharedGlobalBlacklist
});
return promise.resolve(undefined);
},
unload: function(reason) {
loader.unload(this.loader, reason);
delete this.loader;
},
};
// Used when the tools should be loaded from a mozilla-central checkout. In addition
// to different paths, it needs to write chrome.manifest files to override chrome urls
// from the builtin tools.
function SrcdirProvider() {}
SrcdirProvider.prototype = {
fileURI: function(path) {
let file = new FileUtils.File(path);
return Services.io.newFileURI(file).spec;
},
load: function() {
let srcdir = Services.prefs.getComplexValue("devtools.loader.srcdir",
Ci.nsISupportsString);
srcdir = OS.Path.normalize(srcdir.data.trim());
let devtoolsDir = OS.Path.join(srcdir, "browser", "devtools");
let toolkitDir = OS.Path.join(srcdir, "toolkit", "devtools");
let mainURI = this.fileURI(OS.Path.join(devtoolsDir, "main.js"));
let devtoolsURI = this.fileURI(devtoolsDir);
let toolkitURI = this.fileURI(toolkitDir);
let serverURI = this.fileURI(OS.Path.join(toolkitDir, "server"));
let webconsoleURI = this.fileURI(OS.Path.join(toolkitDir, "webconsole"));
let appActorURI = this.fileURI(OS.Path.join(toolkitDir, "apps", "app-actor-front.js"));
let cssLogicURI = this.fileURI(OS.Path.join(toolkitDir, "styleinspector", "css-logic"));
let cssColorURI = this.fileURI(OS.Path.join(toolkitDir, "css-color"));
let outputParserURI = this.fileURI(OS.Path.join(toolkitDir, "output-parser"));
let touchEventsURI = this.fileURI(OS.Path.join(toolkitDir, "touch-events"));
let clientURI = this.fileURI(OS.Path.join(toolkitDir, "client"));
let prettyFastURI = this.fileURI(OS.Path.join(toolkitDir), "pretty-fast.js");
let jsBeautifyURI = this.fileURI(OS.Path.join(toolkitDir, "jsbeautify", "beautify.js"));
let asyncUtilsURI = this.fileURI(OS.Path.join(toolkitDir), "async-utils.js");
let contentObserverURI = this.fileURI(OS.Path.join(toolkitDir), "content-observer.js");
let gcliURI = this.fileURI(OS.Path.join(toolkitDir, "gcli", "source", "lib", "gcli"));
let projecteditorURI = this.fileURI(OS.Path.join(devtoolsDir, "projecteditor"));
let acornURI = this.fileURI(OS.Path.join(toolkitDir, "acorn"));
let acornWalkURI = OS.Path.join(acornURI, "walk.js");
let ternURI = OS.Path.join(toolkitDir, "tern");
let sourceMapURI = this.fileURI(OS.Path.join(toolkitDir), "SourceMap.jsm");
this.loader = new loader.Loader({
id: "fx-devtools",
modules: loaderModules,
paths: {
"": "resource://gre/modules/commonjs/",
"main": mainURI,
"devtools": devtoolsURI,
"devtools/toolkit": toolkitURI,
"devtools/server": serverURI,
"devtools/toolkit/webconsole": webconsoleURI,
"devtools/app-actor-front": appActorURI,
"devtools/styleinspector/css-logic": cssLogicURI,
"devtools/css-color": cssColorURI,
"devtools/output-parser": outputParserURI,
"devtools/touch-events": touchEventsURI,
"devtools/client": clientURI,
"devtools/pretty-fast": prettyFastURI,
"devtools/jsbeautify": jsBeautifyURI,
"devtools/async-utils": asyncUtilsURI,
"devtools/content-observer": contentObserverURI,
"gcli": gcliURI,
"projecteditor": projecteditorURI,
"acorn": acornURI,
"acorn/util/walk": acornWalkURI,
"tern": ternURI,
"source-map": sourceMapURI,
},
globals: this.globals,
invisibleToDebugger: this.invisibleToDebugger,
sharedGlobal: true,
sharedGlobalBlacklist: sharedGlobalBlacklist
});
return this._writeManifest(devtoolsDir).then(null, Cu.reportError);
},
unload: function(reason) {
loader.unload(this.loader, reason);
delete this.loader;
},
_readFile: function(filename) {
let deferred = promise.defer();
let file = new FileUtils.File(filename);
NetUtil.asyncFetch(file, (inputStream, status) => {
if (!Components.isSuccessCode(status)) {
deferred.reject(new Error("Couldn't load manifest: " + filename + "\n"));
return;
}
var data = NetUtil.readInputStreamToString(inputStream, inputStream.available());
deferred.resolve(data);
});
return deferred.promise;
},
_writeFile: function(filename, data) {
let promise = OS.File.writeAtomic(filename, data, {encoding: "utf-8"});
return promise.then(null, (ex) => new Error("Couldn't write manifest: " + ex + "\n"));
},
_writeManifest: function(dir) {
return this._readFile(OS.Path.join(dir, "jar.mn")).then((data) => {
// The file data is contained within inputStream.
// You can read it into a string with
let entries = [];
let lines = data.split(/\n/);
let preprocessed = /^\s*\*/;
let contentEntry = new RegExp("^\\s+content/(\\w+)/(\\S+)\\s+\\((\\S+)\\)");
for (let line of lines) {
if (preprocessed.test(line)) {
dump("Unable to override preprocessed file: " + line + "\n");
continue;
}
let match = contentEntry.exec(line);
if (match) {
let pathComponents = match[3].split("/");
pathComponents.unshift(dir);
let path = OS.Path.join.apply(OS.Path, pathComponents);
let uri = this.fileURI(path);
let entry = "override chrome://" + match[1] + "/content/" + match[2] + "\t" + uri;
entries.push(entry);
}
}
return this._writeFile(OS.Path.join(dir, "chrome.manifest"), entries.join("\n"));
}).then(() => {
Components.manager.addBootstrappedManifestLocation(new FileUtils.File(dir));
});
}
};
/**
* The main devtools API.
* In addition to a few loader-related details, this object will also include all
* exports from the main module. The standard instance of this loader is
* exported as |devtools| below, but if a fresh copy of the loader is needed,
* then a new one can also be created.
*/
this.DevToolsLoader = function DevToolsLoader() {
this.require = this.require.bind(this);
this.lazyGetter = XPCOMUtils.defineLazyGetter.bind(XPCOMUtils);
this.lazyImporter = XPCOMUtils.defineLazyModuleGetter.bind(XPCOMUtils);
this.lazyServiceGetter = XPCOMUtils.defineLazyServiceGetter.bind(XPCOMUtils);
this.lazyRequireGetter = this.lazyRequireGetter.bind(this);
};
DevToolsLoader.prototype = {
get provider() {
if (!this._provider) {
this._chooseProvider();
}
return this._provider;
},
_provider: null,
/**
* A dummy version of require, in case a provider hasn't been chosen yet when
* this is first called. This will then be replaced by the real version.
* @see setProvider
*/
require: function() {
if (!this._provider) {
this._chooseProvider();
}
return this.require.apply(this, arguments);
},
/**
* Define a getter property on the given object that requires the given
* module. This enables delaying importing modules until the module is
* actually used.
*
* @param Object obj
* The object to define the property on.
* @param String property
* The property name.
* @param String module
* The module path.
* @param Boolean destructure
* Pass true if the property name is a member of the module's exports.
*/
lazyRequireGetter: function (obj, property, module, destructure) {
Object.defineProperty(obj, property, {
get: () => destructure
? this.require(module)[property]
: this.require(module || property)
});
},
/**
* Add a URI to the loader.
* @param string id
* The module id that can be used within the loader to refer to this module.
* @param string uri
* The URI to load as a module.
* @returns The module's exports.
*/
loadURI: function(id, uri) {
let module = loader.Module(id, uri);
return loader.load(this.provider.loader, module).exports;
},
/**
* Let the loader know the ID of the main module to load.
*
* The loader doesn't need a main module, but it's nice to have. This
* will be called by the browser devtools to load the devtools/main module.
*
* When only using the server, there's no main module, and this method
* can be ignored.
*/
main: function(id) {
// Ensure the main module isn't loaded twice, because it may have observable
// side-effects.
if (this._mainid) {
return;
}
this._mainid = id;
this._main = loader.main(this.provider.loader, id);
// Mirror the main module's exports on this object.
Object.getOwnPropertyNames(this._main).forEach(key => {
XPCOMUtils.defineLazyGetter(this, key, () => this._main[key]);
});
},
/**
* Override the provider used to load the tools.
*/
setProvider: function(provider) {
if (provider === this._provider) {
return;
}
if (this._provider) {
var events = this.require("sdk/system/events");
events.emit("devtools-unloaded", {});
delete this.require;
this._provider.unload("newprovider");
}
this._provider = provider;
// Pass through internal loader settings specific to this loader instance
this._provider.invisibleToDebugger = this.invisibleToDebugger;
this._provider.globals = {
isWorker: false,
reportError: Cu.reportError,
btoa: btoa,
console: console,
_Iterator: Iterator,
loader: {
lazyGetter: this.lazyGetter,
lazyImporter: this.lazyImporter,
lazyServiceGetter: this.lazyServiceGetter,
lazyRequireGetter: this.lazyRequireGetter
},
};
this._provider.load();
this.require = loader.Require(this._provider.loader, { id: "devtools" });
if (this._mainid) {
this.main(this._mainid);
}
},
/**
* Choose a default tools provider based on the preferences.
*/
_chooseProvider: function() {
if (Services.prefs.prefHasUserValue("devtools.loader.srcdir")) {
this.setProvider(new SrcdirProvider());
} else {
this.setProvider(new BuiltinProvider());
}
},
/**
* Reload the current provider.
*/
reload: function() {
var events = this.require("sdk/system/events");
events.emit("startupcache-invalidate", {});
events.emit("devtools-unloaded", {});
this._provider.unload("reload");
delete this._provider;
this._chooseProvider();
},
/**
* Sets whether the compartments loaded by this instance should be invisible
* to the debugger. Invisibility is needed for loaders that support debugging
* of chrome code. This is true of remote target environments, like Fennec or
* B2G. It is not the default case for desktop Firefox because we offer the
* Browser Toolbox for chrome debugging there, which uses its own, separate
* loader instance.
* @see browser/devtools/framework/ToolboxProcess.jsm
*/
invisibleToDebugger: Services.appinfo.name !== "Firefox"
};
// Export the standard instance of DevToolsLoader used by the tools.
this.devtools = new DevToolsLoader();