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9d7155125b
Backed out changeset 567d4eb7bc83 (bug 1731792) Backed out changeset db57b8568ae9 (bug 1731792)
87 lines
2.6 KiB
C++
87 lines
2.6 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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/**
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* ImageCacheKey is the key type for the image cache (see imgLoader.h).
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*/
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#ifndef mozilla_image_src_ImageCacheKey_h
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#define mozilla_image_src_ImageCacheKey_h
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#include "mozilla/BasePrincipal.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/RefPtr.h"
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#include "PLDHashTable.h"
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class nsIURI;
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namespace mozilla {
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namespace image {
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/**
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* An ImageLib cache entry key.
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*
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* We key the cache on the initial URI (before any redirects), with some
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* canonicalization applied. See ComputeHash() for the details.
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* Controlled documents do not share their cache entries with
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* non-controlled documents, or other controlled documents.
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*/
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class ImageCacheKey final {
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public:
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ImageCacheKey(nsIURI* aURI, const OriginAttributes& aAttrs,
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dom::Document* aDocument);
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ImageCacheKey(const ImageCacheKey& aOther);
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ImageCacheKey(ImageCacheKey&& aOther);
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bool operator==(const ImageCacheKey& aOther) const;
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PLDHashNumber Hash() const {
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if (MOZ_UNLIKELY(mHash.isNothing())) {
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EnsureHash();
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}
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return mHash.value();
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}
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/// A weak pointer to the URI.
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nsIURI* URI() const { return mURI; }
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const OriginAttributes& OriginAttributesRef() const {
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return mOriginAttributes;
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}
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const nsCString& IsolationKeyRef() const { return mIsolationKey; }
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/// Is this cache entry for a chrome image?
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bool IsChrome() const { return mIsChrome; }
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/// A token indicating which service worker controlled document this entry
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/// belongs to, if any.
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void* ControlledDocument() const { return mControlledDocument; }
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private:
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// For ServiceWorker we need to use the document as
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// token for the key. All those exceptions are handled by this method.
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static void* GetSpecialCaseDocumentToken(dom::Document* aDocument);
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// For anti-tracking we need to use an isolation key. It can be the suffix of
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// the PatitionedPrincipal (see StoragePrincipalHelper.h) or the top-level
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// document's base domain. This is handled by this method.
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static nsCString GetIsolationKey(dom::Document* aDocument, nsIURI* aURI);
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void EnsureHash() const;
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nsCOMPtr<nsIURI> mURI;
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OriginAttributes mOriginAttributes;
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void* mControlledDocument;
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nsCString mIsolationKey;
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mutable Maybe<PLDHashNumber> mHash;
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bool mIsChrome;
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_src_ImageCacheKey_h
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