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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 "base/callback.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/lru_cache.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;
// CSSSegmentedFontFace stores two FontFace list-sets, CSS-connected and
// non-CSS-connected. This class combines the two such that they can be
// conveniently operated as one.
// Note however, |Insert| has to be instructed which sub-list to insert it to.
// Iterating over the combined set, behaves as if all non-CSS-connected
// FontFaces were stored after the CSS-connected ones.
class FontFaceList : public GarbageCollected<FontFaceList> {
using FontFaceListPart = HeapListHashSet<Member<FontFace>>;
public:
bool IsEmpty() const;
void Insert(FontFace* font_face, bool css_connected);
bool Erase(FontFace* font_face);
// Iterate over CSS-connected FontFaces first, and then non-CSS-connected
// ones.
// Modifying the collection is not allowed during iteration.
bool ForEachUntilTrue(
const base::RepeatingCallback<bool(Member<FontFace>)>& callback) const;
bool ForEachUntilFalse(
const base::RepeatingCallback<bool(Member<FontFace>)>& callback) const;
void ForEach(
const base::RepeatingCallback<void(Member<FontFace>)>& callback) const;
// Iterate (in reverse order) over non-CSS-connected FontFaces first, and
// then CSS-connected ones.
// Modifying the collection is not allowed during iteration.
bool ForEachReverseUntilTrue(
const base::RepeatingCallback<bool(Member<FontFace>)>& callback) const;
bool ForEachReverseUntilFalse(
const base::RepeatingCallback<bool(Member<FontFace>)>& callback) const;
void ForEachReverse(
const base::RepeatingCallback<void(Member<FontFace>)>& callback) const;
void Trace(Visitor* visitor) const;
private:
FontFaceListPart css_connected_face_;
FontFaceListPart non_css_connected_face_;
};
class CSSSegmentedFontFace final
: public GarbageCollected<CSSSegmentedFontFace> {
public:
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(Visitor*) const;
private:
void PruneTable();
bool IsValid() const;
FontSelectionCapabilities font_selection_capabilities_;
WTF::LruCache<FontCacheKey, scoped_refptr<SegmentedFontData>>
font_data_table_;
// All non-CSS-connected FontFaces are stored after the CSS-connected ones.
Member<FontFaceList> font_faces_;
// 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_
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