5e08f60944
Background task mode is roughly equivalent to `xpcshell`, but inside
the regular browser startup flow. There is no browser window (no
`Window` at all) and there should be no content processes. It's
sufficient to treat it like `xpcshell`, with its own stripped-down
actor and a few tweaks to the integration points.
The structural changes in this commit keep `--backgroundtask` mode
slim in the regular case when the Devtools are *not* requested. This
is reflected in the small changes needed to the
`browser_xpcom_graph_wait.js` test: loading the Devtools
unconditionally causes a huge amount of code to be loaded. In order
to load the Devtools framework conditionally, we check for
Devtools-specific command line flags and delegate to Devtools when
appropriate. In order to check the command line flags, we turn the
`BackgroundTasksManager` into an XPCOM service, which allows it to be
instantiated by XPCOM in order to handle the command line.
One final note: this leaves two XPCOM components, "backgroundtasks"
and "backgroundtasksmanager". Why not combine them? This is
technically possible but not attractive: we really do want a natural
place for native/C++ code ("backgroundtasks") and JavaScript code
("backgroundtasksmanager").
Differential Revision: https://phabricator.services.mozilla.com/D129771
45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* globals require, exports */
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"use strict";
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const { DevToolsServer } = require("devtools/server/devtools-server");
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const { RootActor } = require("devtools/server/actors/root");
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const { BrowserTabList } = require("devtools/server/actors/webbrowser");
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const { ProcessActorList } = require("devtools/server/actors/process");
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const Services = require("Services");
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const {
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ActorRegistry,
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} = require("devtools/server/actors/utils/actor-registry");
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/**
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* background-task specific actors.
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*
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*/
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/**
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* Construct a root actor appropriate for use in a server running a background task.
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*/
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function createRootActor(connection) {
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let parameters = {
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tabList: new BackgroundTaskTabList(connection),
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processList: new ProcessActorList(),
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globalActorFactories: ActorRegistry.globalActorFactories,
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onShutdown() {},
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};
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return new RootActor(connection, parameters);
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}
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exports.createRootActor = createRootActor;
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/**
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* A "stub" TabList implementation that provides no tabs.
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*/
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class BackgroundTaskTabList extends BrowserTabList {
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getList() {
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return Promise.resolve([]);
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}
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}
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