mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
151 lines
4.9 KiB
C++
151 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*
|
|
* cache of re-usable nsCSSRuleProcessors for given sets of style sheets
|
|
*/
|
|
|
|
#ifndef mozilla_RuleProcessorCache_h
|
|
#define mozilla_RuleProcessorCache_h
|
|
|
|
#include "mozilla/MemoryReporting.h"
|
|
#include "mozilla/StaticPtr.h"
|
|
#include "nsCSSRuleProcessor.h"
|
|
#include "nsExpirationTracker.h"
|
|
#include "nsIMediaList.h"
|
|
#include "nsIMemoryReporter.h"
|
|
#include "nsTArray.h"
|
|
|
|
class nsCSSRuleProcessor;
|
|
namespace mozilla {
|
|
class CSSStyleSheet;
|
|
namespace css {
|
|
class DocumentRule;
|
|
} // namespace css
|
|
} // namespace mozilla
|
|
|
|
namespace mozilla {
|
|
|
|
/**
|
|
* The RuleProcessorCache is a singleton object that caches
|
|
* nsCSSRuleProcessors keyed off a list of style sheets and the result of
|
|
* evaluating all @-moz-documents in the style sheets. nsStyleSet gets and
|
|
* puts nsCSSRuleProcessors from/to the RuleProcessorCache.
|
|
*
|
|
* State bits on CSSStyleSheet and nsCSSRuleProcessor track whether they are in
|
|
* the RuleProcessorCache. This lets us remove them from the RuleProcessorCache
|
|
* when they're going away.
|
|
*/
|
|
class RuleProcessorCache final : public nsIMemoryReporter
|
|
{
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIMEMORYREPORTER
|
|
|
|
public:
|
|
static nsCSSRuleProcessor* GetRuleProcessor(
|
|
const nsTArray<CSSStyleSheet*>& aSheets,
|
|
nsPresContext* aPresContext);
|
|
static void PutRuleProcessor(
|
|
const nsTArray<CSSStyleSheet*>& aSheets,
|
|
nsTArray<css::DocumentRule*>&& aDocumentRulesInSheets,
|
|
const nsDocumentRuleResultCacheKey& aCacheKey,
|
|
nsCSSRuleProcessor* aRuleProcessor);
|
|
static void StartTracking(nsCSSRuleProcessor* aRuleProcessor);
|
|
static void StopTracking(nsCSSRuleProcessor* aRuleProcessor);
|
|
|
|
#ifdef DEBUG
|
|
static bool HasRuleProcessor(nsCSSRuleProcessor* aRuleProcessor);
|
|
#endif
|
|
static void RemoveRuleProcessor(nsCSSRuleProcessor* aRuleProcessor);
|
|
static void RemoveSheet(CSSStyleSheet* aSheet);
|
|
|
|
static void Shutdown() { gShutdown = true; gRuleProcessorCache = nullptr; }
|
|
|
|
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
|
|
|
|
private:
|
|
class ExpirationTracker : public nsExpirationTracker<nsCSSRuleProcessor,3>
|
|
{
|
|
public:
|
|
explicit ExpirationTracker(RuleProcessorCache* aCache)
|
|
: nsExpirationTracker<nsCSSRuleProcessor,3>(
|
|
10000, "RuleProcessorCache::ExpirationTracker")
|
|
, mCache(aCache) {}
|
|
|
|
void RemoveObjectIfTracked(nsCSSRuleProcessor* aRuleProcessor);
|
|
|
|
virtual void NotifyExpired(nsCSSRuleProcessor* aRuleProcessor) override {
|
|
mCache->RemoveRuleProcessor(aRuleProcessor);
|
|
}
|
|
|
|
private:
|
|
RuleProcessorCache* mCache;
|
|
};
|
|
|
|
RuleProcessorCache() : mExpirationTracker(this) {}
|
|
~RuleProcessorCache();
|
|
|
|
void InitMemoryReporter();
|
|
|
|
static bool EnsureGlobal();
|
|
static StaticRefPtr<RuleProcessorCache> gRuleProcessorCache;
|
|
static bool gShutdown;
|
|
|
|
void DoRemoveSheet(CSSStyleSheet* aSheet);
|
|
nsCSSRuleProcessor* DoGetRuleProcessor(
|
|
const nsTArray<CSSStyleSheet*>& aSheets,
|
|
nsPresContext* aPresContext);
|
|
void DoPutRuleProcessor(const nsTArray<CSSStyleSheet*>& aSheets,
|
|
nsTArray<css::DocumentRule*>&& aDocumentRulesInSheets,
|
|
const nsDocumentRuleResultCacheKey& aCacheKey,
|
|
nsCSSRuleProcessor* aRuleProcessor);
|
|
#ifdef DEBUG
|
|
bool DoHasRuleProcessor(nsCSSRuleProcessor* aRuleProcessor);
|
|
#endif
|
|
void DoRemoveRuleProcessor(nsCSSRuleProcessor* aRuleProcessor);
|
|
void DoStartTracking(nsCSSRuleProcessor* aRuleProcessor);
|
|
void DoStopTracking(nsCSSRuleProcessor* aRuleProcessor);
|
|
|
|
struct DocumentEntry {
|
|
nsDocumentRuleResultCacheKey mCacheKey;
|
|
RefPtr<nsCSSRuleProcessor> mRuleProcessor;
|
|
};
|
|
|
|
struct Entry {
|
|
nsTArray<CSSStyleSheet*> mSheets;
|
|
nsTArray<css::DocumentRule*> mDocumentRulesInSheets;
|
|
nsTArray<DocumentEntry> mDocumentEntries;
|
|
};
|
|
|
|
// Function object to test whether an Entry object has a given sheet
|
|
// in its mSheets array. If it does, removes all of its rule processors
|
|
// before returning true.
|
|
struct HasSheet_ThenRemoveRuleProcessors {
|
|
HasSheet_ThenRemoveRuleProcessors(RuleProcessorCache* aCache,
|
|
CSSStyleSheet* aSheet)
|
|
: mCache(aCache), mSheet(aSheet) {}
|
|
bool operator()(Entry& aEntry) {
|
|
if (aEntry.mSheets.Contains(mSheet)) {
|
|
for (DocumentEntry& de : aEntry.mDocumentEntries) {
|
|
de.mRuleProcessor->SetInRuleProcessorCache(false);
|
|
mCache->mExpirationTracker.RemoveObjectIfTracked(de.mRuleProcessor);
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
RuleProcessorCache* mCache;
|
|
CSSStyleSheet* mSheet;
|
|
};
|
|
|
|
ExpirationTracker mExpirationTracker;
|
|
nsTArray<Entry> mEntries;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_RuleProcessorCache_h
|