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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_PLATFORM_FONTS_FONT_SELECTOR_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_SELECTOR_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/fonts/font_cache_client.h"
#include "third_party/blink/renderer/platform/fonts/font_fallback_priority.h"
#include "third_party/blink/renderer/platform/fonts/font_invalidation_reason.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
namespace blink {
class ExecutionContext;
class FontData;
class FontDataForRangeSet;
class FontDescription;
class FontFaceCache;
class FontFallbackMap;
class FontFamily;
class FontSelectorClient;
class GenericFontFamilySettings;
class UseCounter;
class PLATFORM_EXPORT FontSelector : public FontCacheClient {
public:
~FontSelector() override = default;
virtual const FontData* GetFontData(const FontDescription&,
const FontFamily&) = 0;
// TODO(crbug.com/542629): The String variant of this method should be
// replaced with a better approach, now that we only have complex text.
virtual void WillUseFontData(const FontDescription&,
const FontFamily& family,
const String& text) = 0;
virtual void WillUseRange(const FontDescription&,
const AtomicString& family_name,
const FontDataForRangeSet&) = 0;
virtual unsigned Version() const = 0;
// Called when a page attempts to match a font family, and the font family is
// available.
virtual void ReportSuccessfulFontFamilyMatch(
const AtomicString& font_family_name) = 0;
// Called when a page attempts to match a font family, and the font family is
// not available.
virtual void ReportFailedFontFamilyMatch(
const AtomicString& font_family_name) = 0;
// Called when a page attempts to match a font name via a @font-face src:local
// rule, and the font is available.
virtual void ReportSuccessfulLocalFontMatch(
const AtomicString& font_name) = 0;
// Called when a page attempts to match a font name via a @font-face src:local
// rule, and the font is not available.
virtual void ReportFailedLocalFontMatch(const AtomicString& font_name) = 0;
virtual void ReportNotDefGlyph() const = 0;
// Called during text shaping of emoji presentation segments and after
// identifying how many clusters render as a single, non-tofu glyph.
virtual void ReportEmojiSegmentGlyphCoverage(
unsigned num_clusters,
unsigned num_broken_clusters) = 0;
virtual void RegisterForInvalidationCallbacks(FontSelectorClient*) = 0;
virtual void UnregisterForInvalidationCallbacks(FontSelectorClient*) = 0;
virtual void FontFaceInvalidated(FontInvalidationReason) {}
virtual ExecutionContext* GetExecutionContext() const = 0;
virtual FontFaceCache* GetFontFaceCache() = 0;
virtual bool IsPlatformFamilyMatchAvailable(
const FontDescription&,
const FontFamily& passed_family) = 0;
FontFallbackMap& GetFontFallbackMap();
void Trace(Visitor* visitor) const override;
protected:
static AtomicString FamilyNameFromSettings(
const GenericFontFamilySettings&,
const FontDescription&,
const FontFamily& generic_family_name,
UseCounter*);
static bool IsWebkitBodyFamily(const FontDescription& font_description);
private:
Member<FontFallbackMap> font_fallback_map_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_SELECTOR_H_
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