image/ImageCacheKey.h
author B2G Bumper Bot <release+b2gbumper@mozilla.com>
Fri, 07 Aug 2015 03:25:27 -0700
changeset 288431 b37ca53168cf1c1425e99577347dda3968008777
parent 275690 fc204743547e054661a61d6defcc892053cc7e98
child 299739 91d4539e00cecb658604e021675a923c60ef3235
permissions -rw-r--r--
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump ======== https://hg.mozilla.org/integration/gaia-central/rev/3554e347352c Author: Carsten Book <tomcat@mozilla.com> Desc: Merge pull request #31269 from snowmantw/bug1191858 Bug 1191858 - remove the incorrect promise in the test. r=julienw ======== https://hg.mozilla.org/integration/gaia-central/rev/757970e573a8 Author: Greg Weng <snowmantw@gmail.com> Desc: Bug 1191858 - remove the incorrect promise in the test

/* -*- 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/Maybe.h"

class nsIURI;

namespace mozilla {
namespace image {

class ImageURL;

/**
 * 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.
 */
class ImageCacheKey final
{
public:
  explicit ImageCacheKey(nsIURI* aURI);
  explicit ImageCacheKey(ImageURL* aURI);

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

  bool operator==(const ImageCacheKey& aOther) const;
  uint32_t Hash() const { return mHash; }

  /// A weak pointer to the URI spec for this cache entry. For logging only.
  const char* Spec() const;

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

private:
  static uint32_t ComputeHash(ImageURL* aURI,
                              const Maybe<uint64_t>& aBlobSerial);

  nsRefPtr<ImageURL> mURI;
  Maybe<uint64_t> mBlobSerial;
  uint32_t mHash;
  bool mIsChrome;
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_src_ImageCacheKey_h