зеркало из https://github.com/mozilla/gecko-dev.git
90 строки
2.6 KiB
C++
90 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef mozilla_dom_l10n_L10nMutations_h
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#define mozilla_dom_l10n_L10nMutations_h
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#include "nsRefreshDriver.h"
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#include "nsStubMutationObserver.h"
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#include "nsTHashtable.h"
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#include "mozilla/dom/DOMLocalization.h"
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namespace mozilla {
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namespace dom {
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/**
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* L10nMutations manage observing roots for localization
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* changes and coalescing pending translations into
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* batches - one per animation frame.
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*/
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class L10nMutations final : public nsStubMutationObserver,
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public nsARefreshObserver {
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(L10nMutations, nsIMutationObserver)
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
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NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
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explicit L10nMutations(DOMLocalization* aDOMLocalization);
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/**
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* Pause root observation.
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* This is useful for injecting already-translated
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* content into an observed root, without causing
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* superflues translation.
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*/
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void PauseObserving();
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/**
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* Resume root observation.
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*/
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void ResumeObserving();
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/**
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* Disconnect roots, stop refresh observer
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* and break the cycle collection deadlock
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* by removing the reference to mDOMLocalization.
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*/
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void Disconnect();
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/**
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* Called when PresShell gets created for the document.
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* If there are already pending mutations, this
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* will schedule the refresh driver to translate them.
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*/
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void OnCreatePresShell();
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protected:
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bool mObserving = false;
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bool mRefreshObserver = false;
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RefPtr<nsRefreshDriver> mRefreshDriver;
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DOMLocalization* mDOMLocalization;
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// The hash is used to speed up lookups into mPendingElements.
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nsTHashtable<nsRefPtrHashKey<Element>> mPendingElementsHash;
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nsTArray<RefPtr<Element>> mPendingElements;
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virtual void WillRefresh(mozilla::TimeStamp aTime) override;
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void StartRefreshObserver();
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void StopRefreshObserver();
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void L10nElementChanged(Element* aElement);
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void FlushPendingTranslations();
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private:
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~L10nMutations() {
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StopRefreshObserver();
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MOZ_ASSERT(!mDOMLocalization,
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"DOMLocalization<-->L10nMutations cycle should be broken.");
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}
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_l10n_L10nMutations_h__
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