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/*
* Copyright (C) 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_SEGMENTED_FONT_FACE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_SEGMENTED_FONT_FACE_H_
#include "third_party/blink/renderer/platform/fonts/font_cache_key.h"
#include "third_party/blink/renderer/platform/fonts/font_selection_types.h"
#include "third_party/blink/renderer/platform/fonts/segmented_font_data.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class FontData;
class FontDescription;
class FontFace;
class SegmentedFontData;
class CSSSegmentedFontFace final
: public GarbageCollectedFinalized<CSSSegmentedFontFace> {
public:
static CSSSegmentedFontFace* Create(
FontSelectionCapabilities font_selection_capabilities) {
return MakeGarbageCollected<CSSSegmentedFontFace>(
font_selection_capabilities);
}
CSSSegmentedFontFace(FontSelectionCapabilities);
~CSSSegmentedFontFace();
FontSelectionCapabilities GetFontSelectionCapabilities() const {
return font_selection_capabilities_;
}
// Called when status of a FontFace has changed (e.g. loaded or timed out)
// so cached FontData must be discarded.
void FontFaceInvalidated();
void AddFontFace(FontFace*, bool css_connected);
void RemoveFontFace(FontFace*);
bool IsEmpty() const { return font_faces_.IsEmpty(); }
scoped_refptr<FontData> GetFontData(const FontDescription&);
bool CheckFont(const String&) const;
void Match(const String&, HeapVector<Member<FontFace>>&) const;
void WillUseFontData(const FontDescription&, const String& text);
void WillUseRange(const FontDescription&, const blink::FontDataForRangeSet&);
size_t ApproximateCharacterCount() const {
return approximate_character_count_;
}
void Trace(blink::Visitor*);
private:
void PruneTable();
bool IsValid() const;
using FontFaceList = HeapListHashSet<Member<FontFace>>;
FontSelectionCapabilities font_selection_capabilities_;
HashMap<FontCacheKey,
scoped_refptr<SegmentedFontData>,
FontCacheKeyHash,
FontCacheKeyTraits>
font_data_table_;
// All non-CSS-connected FontFaces are stored after the CSS-connected ones.
FontFaceList font_faces_;
FontFaceList::iterator first_non_css_connected_face_;
// Approximate number of characters styled with this CSSSegmentedFontFace.
// LayoutText::StyleDidChange() increments this on the first
// CSSSegmentedFontFace in the style's font family list, so this is not
// counted if this font is used as a fallback font. Also, this may be double
// counted by style recalcs.
// TODO(ksakamoto): Revisit the necessity of this. crbug.com/613500
size_t approximate_character_count_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_SEGMENTED_FONT_FACE_H_