image/ImageCacheKey.h
author L10n Bumper Bot <release+l10nbumper@mozilla.com>
Thu, 08 Nov 2018 03:00:11 -0800
changeset 501100 1cd4f2d571554c4dc89cf1be1d98683c0d14f797
parent 480013 2a94bdf78194df4c5ff16769310abe152534c98f
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
no bug - Bumping Fennec l10n changesets r=release a=l10n-bump DONTBUILD an -> 336e061995b9 ar -> f6834a7d7374 as -> d2c76e616a66 ast -> fcb8f3455237 az -> c4caf3b07cf2 be -> 697eb1022498 bg -> 7bf1f448f743 bn-BD -> 5f7a87adee06 bn-IN -> 49ce3195c4c2 br -> 41cf35b7c5b5 bs -> 4a14aee27904 ca -> 9373e8ce86d4 cak -> a40d767541ba cs -> 4b99defb0525 cy -> 4c948fed2584 de -> 017a7e7a267a dsb -> aadebeccf5ba el -> 2d28a78dcef5 en-CA -> 55ad9171a9f0 en-GB -> 296422b495e9 en-ZA -> c1b5d2128914 eo -> c68e87667d9f es-AR -> bff0a788c711 es-CL -> 1d3efd2532ea es-ES -> 4d1feb70b0e2 es-MX -> fceda607d0f4 et -> 58a8262a0cc7 eu -> 7cebfd46208b fa -> cbc040d58476 ff -> 46f5aec275ea fi -> 235ab13d261e fr -> 8ee417b64f99

/* -*- 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
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**
 * ImageCacheKey is the key type for the image cache (see imgLoader.h).
 */

#ifndef mozilla_image_src_ImageCacheKey_h
#define mozilla_image_src_ImageCacheKey_h

#include "mozilla/BasePrincipal.h"
#include "mozilla/Maybe.h"
#include "mozilla/RefPtr.h"
#include "PLDHashTable.h"

class nsIDocument;
class nsIURI;

namespace mozilla {
namespace image {

/**
 * An ImageLib cache entry key.
 *
 * We key the cache on the initial URI (before any redirects), with some
 * canonicalization applied. See ComputeHash() for the details.
 * Controlled documents do not share their cache entries with
 * non-controlled documents, or other controlled documents.
 */
class ImageCacheKey final
{
public:
  ImageCacheKey(nsIURI* aURI, const OriginAttributes& aAttrs,
                nsIDocument* aDocument, nsresult& aRv);

  ImageCacheKey(const ImageCacheKey& aOther);
  ImageCacheKey(ImageCacheKey&& aOther);

  bool operator==(const ImageCacheKey& aOther) const;
  PLDHashNumber Hash() const { return mHash; }

  /// A weak pointer to the URI.
  nsIURI* URI() const { return mURI; }

  const OriginAttributes& OriginAttributesRef() const { return mOriginAttributes; }

  /// Is this cache entry for a chrome image?
  bool IsChrome() const { return mIsChrome; }

  /// A token indicating which service worker controlled document this entry
  /// belongs to, if any.
  void* ControlledDocument() const { return mControlledDocument; }

private:
  bool SchemeIs(const char* aScheme);

  // For ServiceWorker and for anti-tracking we need to use the document as
  // token for the key. All those exceptions are handled by this method.
  static void* GetSpecialCaseDocumentToken(nsIDocument* aDocument,
                                           nsIURI* aURI);

  nsCOMPtr<nsIURI> mURI;
  Maybe<uint64_t> mBlobSerial;
  nsCString mBlobRef;
  OriginAttributes mOriginAttributes;
  void* mControlledDocument;
  PLDHashNumber mHash;
  bool mIsChrome;
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_src_ImageCacheKey_h