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/*
* Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CSSFontFaceSource_h
#define CSSFontFaceSource_h
#include "base/macros.h"
#include "core/CoreExport.h"
#include "platform/fonts/FontCacheKey.h"
#include "platform/fonts/FontSelectionTypes.h"
#include "platform/heap/Handle.h"
#include "platform/wtf/Allocator.h"
#include "platform/wtf/HashMap.h"
#include "platform/wtf/LinkedHashSet.h"
namespace blink {
class FontDescription;
class SimpleFontData;
enum FontDisplay {
kFontDisplayAuto,
kFontDisplayBlock,
kFontDisplaySwap,
kFontDisplayFallback,
kFontDisplayOptional,
kFontDisplayEnumMax
};
class CORE_EXPORT CSSFontFaceSource
: public GarbageCollectedFinalized<CSSFontFaceSource> {
public:
virtual ~CSSFontFaceSource();
virtual bool IsLocal() const { return false; }
virtual bool IsLoading() const { return false; }
virtual bool IsLoaded() const { return true; }
virtual bool IsValid() const { return true; }
scoped_refptr<SimpleFontData> GetFontData(const FontDescription&,
const FontSelectionCapabilities&);
virtual bool IsLocalFontAvailable(const FontDescription&) { return false; }
virtual void BeginLoadIfNeeded() {}
virtual void SetDisplay(FontDisplay) {}
virtual bool IsInBlockPeriod() const { return false; }
virtual bool IsInFailurePeriod() const { return false; }
// For UMA reporting
virtual bool HadBlankText() { return false; }
virtual void Trace(blink::Visitor* visitor) {}
protected:
CSSFontFaceSource() = default;
virtual scoped_refptr<SimpleFontData> CreateFontData(
const FontDescription&,
const FontSelectionCapabilities&) = 0;
void PruneTable();
private:
void PruneOldestIfNeeded();
using FontDataTable = HashMap<FontCacheKey,
scoped_refptr<SimpleFontData>,
FontCacheKeyHash,
FontCacheKeyTraits>;
using FontCacheKeyAgeList =
LinkedHashSet<FontCacheKey, FontCacheKeyHash, FontCacheKeyTraits>;
FontDataTable font_data_table_;
FontCacheKeyAgeList font_cache_key_age;
DISALLOW_COPY_AND_ASSIGN(CSSFontFaceSource);
};
} // namespace blink
#endif