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/*
* Copyright (C) 2007, 2008 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 THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_FONT_FACE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_FONT_FACE_H_
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_font_face_source.h"
#include "third_party/blink/renderer/core/css/css_segmented_font_face.h"
#include "third_party/blink/renderer/core/css/font_face.h"
#include "third_party/blink/renderer/core/css/font_face_source.h"
#include "third_party/blink/renderer/platform/fonts/segmented_font_data.h"
#include "third_party/blink/renderer/platform/fonts/unicode_range_set.h"
#include "third_party/blink/renderer/platform/wtf/deque.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class FontDescription;
class RemoteFontFaceSource;
class SimpleFontData;
class CORE_EXPORT CSSFontFace final : public GarbageCollected<CSSFontFace> {
public:
CSSFontFace(FontFace* font_face, Vector<UnicodeRange>& ranges)
: ranges_(base::AdoptRef(new UnicodeRangeSet(ranges))),
font_face_(font_face) {
DCHECK(font_face_);
}
FontFace* GetFontFace() const { return font_face_; }
scoped_refptr<UnicodeRangeSet> Ranges() { return ranges_; }
void AddSegmentedFontFace(CSSSegmentedFontFace*);
void RemoveSegmentedFontFace(CSSSegmentedFontFace*);
bool IsValid() const { return !sources_.IsEmpty(); }
size_t ApproximateBlankCharacterCount() const;
void AddSource(CSSFontFaceSource*);
void SetDisplay(FontDisplay);
void DidBeginLoad();
bool FontLoaded(CSSFontFaceSource*);
bool FallbackVisibilityChanged(RemoteFontFaceSource*);
scoped_refptr<SimpleFontData> GetFontData(const FontDescription&);
FontFace::LoadStatusType LoadStatus() const {
return font_face_->LoadStatus();
}
bool MaybeLoadFont(const FontDescription&, const String&);
bool MaybeLoadFont(const FontDescription&, const FontDataForRangeSet&);
void Load();
void Load(const FontDescription&);
// Recalculate the font loading timeline period for the font face.
// https://drafts.csswg.org/css-fonts-4/#font-display-timeline
// Returns true if the display period is changed.
bool UpdatePeriod();
bool HadBlankText() { return IsValid() && sources_.front()->HadBlankText(); }
void Trace(Visitor*);
private:
void SetLoadStatus(FontFace::LoadStatusType);
scoped_refptr<UnicodeRangeSet> ranges_;
HeapHashSet<Member<CSSSegmentedFontFace>> segmented_font_faces_;
HeapDeque<Member<CSSFontFaceSource>> sources_;
Member<FontFace> font_face_;
DISALLOW_COPY_AND_ASSIGN(CSSFontFace);
};
} // namespace blink
#endif
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