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