45eb7e06ce
This commit exposes the Permissions API to DOM Workers. It achieves this goal by introducing a thread-safe bridge between `PermissionStatus` and the `PermissionObserver`: the `PermissionStatusSink` object. Actors: - The `PermissionObserver` is a main-thread-only singleton that monitors permission change events and propagates the notification to the right sink objects. - The `PermissionStatus` is the DOM object exposed to the global. It's not thread-safe. - The `PermissionStatusSink` is the new bridge introduced by this commit. The `PermissionStatusSink` lifetime: - This object is kept alive on the current thread by the `PermissionStatus` and on the main thread by the `PermissionObserver`. - The `PermissionStatus` creates the object on its creation thread. When `PermissionStatus` object is released (or disconnected from the owner, it disentangles itself from the `PermissionStatusSink`. The disentangle operation triggers the un-registration procedure from the `PermissionObserver` on the main thread. - A weak `WorkerRef` is used to monitor the worker's lifetime. Permission change notification: - When the `PermissionObserver` is notified for a permission-change event, it notifies all the `PermissionStatusSink`. This happens on the main thread (see `MaybeUpdatedByOnMainThread` and `MaybeUpdatedByNotifyOnlyOnMainThread`). - Using `MozPromise`, the `PermissionStatusSink` computes the permission action (`PermissionChangedOnMainThread`) on the main thread, then informs the parent `PermissionStatus` object on its creation thread. - The `PermissionStatus` object converts the action to the DOM `PermissionState` and dispatches an event. Differential Revision: https://phabricator.services.mozilla.com/D224594
33 lines
885 B
Python
33 lines
885 B
Python
# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
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# vim: set filetype=python:
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# 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
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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with Files("**"):
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BUG_COMPONENT = ("Core", "DOM: Core & HTML")
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EXPORTS.mozilla.dom += [
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"MidiPermissionStatus.h",
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"Permissions.h",
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"PermissionStatus.h",
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"PermissionUtils.h",
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"StorageAccessPermissionStatus.h",
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]
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UNIFIED_SOURCES += [
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"MidiPermissionStatus.cpp",
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"PermissionObserver.cpp",
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"Permissions.cpp",
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"PermissionStatus.cpp",
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"PermissionStatusSink.cpp",
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"PermissionUtils.cpp",
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"StorageAccessPermissionStatus.cpp",
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]
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MOCHITEST_MANIFESTS += ["tests/mochitest.toml"]
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FINAL_LIBRARY = "xul"
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include("/ipc/chromium/chromium-config.mozbuild")
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