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/*
* Copyright (C) 2007-2023 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 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 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.
*/
#pragma once
#include "ActiveDOMObject.h"
#include "CSSFontFace.h"
#include "CSSFontFaceSet.h"
#include "CachedResourceHandle.h"
#include "Font.h"
#include "FontSelector.h"
#include "Timer.h"
#include "WebKitFontFamilyNames.h"
#include <memory>
#include <wtf/Forward.h>
#include <wtf/HashSet.h>
#include <wtf/RefPtr.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
class CSSPrimitiveValue;
class CSSSegmentedFontFace;
class CSSValueList;
class CachedFont;
class ScriptExecutionContext;
class StyleRuleFontFace;
class StyleRuleFontFeatureValues;
class StyleRuleFontPaletteValues;
class CSSFontSelector final : public FontSelector, public CSSFontFace::Client, public ActiveDOMObject {
public:
using FontSelector::weakPtrFactory;
using FontSelector::WeakValueType;
using FontSelector::WeakPtrImplType;
static Ref<CSSFontSelector> create(ScriptExecutionContext&);
virtual ~CSSFontSelector();
unsigned version() const final { return m_version; }
unsigned uniqueId() const final { return m_uniqueId; }
FontRanges fontRangesForFamily(const FontDescription&, const AtomString&) final;
size_t fallbackFontCount() final;
RefPtr<Font> fallbackFontAt(const FontDescription&, size_t) final;
void clearFonts();
void emptyCaches();
void buildStarted();
void buildCompleted();
void addFontFaceRule(StyleRuleFontFace&, bool isInitiatingElementInUserAgentShadowTree);
void addFontPaletteValuesRule(const StyleRuleFontPaletteValues&);
void addFontFeatureValuesRule(const StyleRuleFontFeatureValues&);
void fontCacheInvalidated() final;
bool isEmpty() const;
void registerForInvalidationCallbacks(FontSelectorClient&) final;
void unregisterForInvalidationCallbacks(FontSelectorClient&) final;
ScriptExecutionContext* scriptExecutionContext() const { return m_context.get(); }
FontFaceSet* fontFaceSetIfExists();
FontFaceSet& fontFaceSet();
CSSFontFaceSet& cssFontFaceSet() { return m_cssFontFaceSet; }
void incrementIsComputingRootStyleFont() { ++m_computingRootStyleFontCount; }
void decrementIsComputingRootStyleFont() { --m_computingRootStyleFontCount; }
void loadPendingFonts();
void updateStyleIfNeeded();
// CSSFontFace::Client needs to be able to be held in a RefPtr.
void ref() final { FontSelector::ref(); }
void deref() final { FontSelector::deref(); }
private:
explicit CSSFontSelector(ScriptExecutionContext&);
void dispatchInvalidationCallbacks();
void opportunisticallyStartFontDataURLLoading(const FontCascadeDescription&, const AtomString& family) final;
std::optional<AtomString> resolveGenericFamily(const FontDescription&, const AtomString& family);
const FontPaletteValues& lookupFontPaletteValues(const AtomString& familyName, const FontDescription&);
RefPtr<FontFeatureValues> lookupFontFeatureValues(const AtomString& familyName);
// CSSFontFace::Client
void fontLoaded(CSSFontFace&) final;
void updateStyleIfNeeded(CSSFontFace&) final;
void fontModified();
// ActiveDOMObject
const char* activeDOMObjectName() const final { return "CSSFontSelector"_s; }
struct PendingFontFaceRule {
StyleRuleFontFace& styleRuleFontFace;
bool isInitiatingElementInUserAgentShadowTree;
};
Vector<PendingFontFaceRule> m_stagingArea;
WeakPtr<ScriptExecutionContext> m_context;
RefPtr<FontFaceSet> m_fontFaceSet;
Ref<CSSFontFaceSet> m_cssFontFaceSet;
HashSet<FontSelectorClient*> m_clients;
struct PaletteMapHash : DefaultHash<std::pair<AtomString, AtomString>> {
static unsigned hash(const std::pair<AtomString, AtomString>& key)
{
return pairIntHash(ASCIICaseInsensitiveHash::hash(key.first), DefaultHash<AtomString>::hash(key.second));
}
static bool equal(const std::pair<AtomString, AtomString>& a, const std::pair<AtomString, AtomString>& b)
{
return ASCIICaseInsensitiveHash::equal(a.first, b.first) && DefaultHash<AtomString>::equal(a.second, b.second);
}
};
HashMap<std::pair<AtomString, AtomString>, FontPaletteValues, PaletteMapHash> m_paletteMap;
HashMap<String, Ref<FontFeatureValues>> m_featureValues;
HashSet<RefPtr<CSSFontFace>> m_cssConnectionsPossiblyToRemove;
HashSet<RefPtr<StyleRuleFontFace>> m_cssConnectionsEncounteredDuringBuild;
CSSFontFaceSet::FontModifiedObserver m_fontModifiedObserver;
unsigned m_uniqueId;
unsigned m_version;
unsigned m_computingRootStyleFontCount { 0 };
bool m_creatingFont { false };
bool m_buildIsUnderway { false };
bool m_isStopped { false };
WebKitFontFamilyNames::FamilyNamesList<AtomString> m_fontFamilyNames;
};
} // namespace WebCore
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