46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#include "LineBreakCache.h"
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#include "nsIObserverService.h"
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#include "mozilla/Services.h"
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using namespace mozilla;
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using namespace mozilla::intl;
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StaticAutoPtr<LineBreakCache> LineBreakCache::sBreakCache;
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void LineBreakCache::Initialize() {
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MOZ_ASSERT(NS_IsMainThread());
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nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
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if (obs) {
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obs->AddObserver(new LineBreakCache::Observer(), "memory-pressure", false);
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}
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}
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void LineBreakCache::Shutdown() {
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MOZ_ASSERT(NS_IsMainThread());
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sBreakCache = nullptr;
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}
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NS_IMPL_ISUPPORTS(LineBreakCache::Observer, nsIObserver)
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NS_IMETHODIMP LineBreakCache::Observer::Observe(nsISupports* aSubject,
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const char* aTopic,
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const char16_t* aData) {
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MOZ_ASSERT(NS_IsMainThread());
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if (strcmp(aTopic, "memory-pressure") == 0) {
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// We don't delete the cache itself, as it would almost certainly just
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// get immediately re-created; just clear its contents.
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if (LineBreakCache::sBreakCache) {
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LineBreakCache::sBreakCache->Clear();
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}
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}
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return NS_OK;
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}
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