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82 lines
2.6 KiB
C++
82 lines
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_SharedStyleSheetCache_h__
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#define mozilla_SharedStyleSheetCache_h__
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// The shared style sheet cache is a cache that allows us to share sheets across
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// documents.
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//
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// It's generally a singleton, but it is different from GlobalStyleSheetCache in
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// the sense that:
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//
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// * It needs to be cycle-collectable, as it can keep alive style sheets from
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// various documents.
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//
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// * It is conceptually a singleton, but given its cycle-collectable nature, we
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// might re-create it.
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#include "mozilla/SharedSubResourceCache.h"
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#include "nsRefPtrHashtable.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/css/Loader.h"
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namespace mozilla {
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class StyleSheet;
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class SheetLoadDataHashKey;
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namespace css {
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class SheetLoadData;
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class Loader;
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} // namespace css
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struct SharedStyleSheetCacheTraits {
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using Loader = css::Loader;
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using Key = SheetLoadDataHashKey;
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using Value = StyleSheet;
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using LoadingValue = css::SheetLoadData;
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static SheetLoadDataHashKey KeyFromLoadingValue(const LoadingValue& aValue) {
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return SheetLoadDataHashKey(aValue);
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}
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};
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class SharedStyleSheetCache final
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: public SharedSubResourceCache<SharedStyleSheetCacheTraits,
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SharedStyleSheetCache>,
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public nsIMemoryReporter {
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public:
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using Base = SharedSubResourceCache<SharedStyleSheetCacheTraits,
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SharedStyleSheetCache>;
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NS_DECL_ISUPPORTS
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NS_DECL_NSIMEMORYREPORTER
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SharedStyleSheetCache();
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void Init();
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// This has to be static because it's also called for loaders that don't have
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// a sheet cache (loaders that are not owned by a document).
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static void LoadCompleted(SharedStyleSheetCache*, css::SheetLoadData&,
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nsresult);
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using Base::LoadCompleted;
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static void LoadCompletedInternal(SharedStyleSheetCache*, css::SheetLoadData&,
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nsTArray<RefPtr<css::SheetLoadData>>&);
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static void Clear(const Maybe<nsCOMPtr<nsIPrincipal>>& aPrincipal = Nothing(),
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const Maybe<nsCString>& aSchemelessSite = Nothing(),
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const Maybe<OriginAttributesPattern>& aPattern = Nothing());
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protected:
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void InsertIfNeeded(css::SheetLoadData&);
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~SharedStyleSheetCache();
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};
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} // namespace mozilla
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#endif
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