#pragma once
#include "CSSFontFace.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
class CSSPrimitiveValue;
class FontFaceSet;
class CSSFontFaceSetClient {
public:
virtual ~CSSFontFaceSetClient() = default;
virtual void faceFinished(CSSFontFace&, CSSFontFace::Status) { };
virtual void fontModified() { };
virtual void startedLoading() { };
virtual void completedLoading() { };
};
class CSSFontFaceSet final : public RefCounted<CSSFontFaceSet>, public CSSFontFace::Client {
public:
static Ref<CSSFontFaceSet> create(CSSFontSelector* owningFontSelector = nullptr)
{
return adoptRef(*new CSSFontFaceSet(owningFontSelector));
}
~CSSFontFaceSet();
void addClient(CSSFontFaceSetClient&);
void removeClient(CSSFontFaceSetClient&);
bool hasFace(const CSSFontFace&) const;
size_t faceCount() const { return m_faces.size(); }
void add(CSSFontFace&);
void remove(const CSSFontFace&);
void purge();
void emptyCaches();
void clear();
CSSFontFace& operator[](size_t i);
CSSFontFace* lookUpByCSSConnection(StyleRuleFontFace&);
ExceptionOr<bool> check(const String& font, const String& text);
CSSSegmentedFontFace* fontFace(FontSelectionRequest, const AtomString& family);
enum class Status { Loading, Loaded };
Status status() const { return m_status; }
bool hasActiveFontFaces() { return status() == Status::Loading; }
ExceptionOr<Vector<std::reference_wrapper<CSSFontFace>>> matchingFacesExcludingPreinstalledFonts(const String& font, const String& text);
void ref() final { RefCounted::ref(); }
void deref() final { RefCounted::deref(); }
private:
CSSFontFaceSet(CSSFontSelector*);
void removeFromFacesLookupTable(const CSSFontFace&, const CSSValueList& familiesToSearchFor);
void addToFacesLookupTable(CSSFontFace&);
void incrementActiveCount();
void decrementActiveCount();
void fontStateChanged(CSSFontFace&, CSSFontFace::Status oldState, CSSFontFace::Status newState) final;
void fontPropertyChanged(CSSFontFace&, CSSValueList* oldFamilies = nullptr) final;
void ensureLocalFontFacesForFamilyRegistered(const String&);
static String familyNameFromPrimitive(const CSSPrimitiveValue&);
using FontSelectionKey = Optional<FontSelectionRequest>;
struct FontSelectionKeyHash {
static unsigned hash(const FontSelectionKey& key) { return computeHash(key); }
static bool equal(const FontSelectionKey& a, const FontSelectionKey& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
struct FontSelectionKeyHashTraits : SimpleClassHashTraits<FontSelectionKey> {
static const bool emptyValueIsZero = false;
static FontSelectionKey emptyValue() { return FontSelectionRequest { }; }
static void constructDeletedValue(FontSelectionKey& slot) { slot = WTF::nullopt; }
static bool isDeletedValue(const FontSelectionKey& value) { return !value; }
};
using FontSelectionHashMap = HashMap<FontSelectionKey, RefPtr<CSSSegmentedFontFace>, FontSelectionKeyHash, FontSelectionKeyHashTraits>;
Vector<Ref<CSSFontFace>> m_faces; HashMap<String, Vector<Ref<CSSFontFace>>, ASCIICaseInsensitiveHash> m_facesLookupTable;
HashMap<String, Vector<Ref<CSSFontFace>>, ASCIICaseInsensitiveHash> m_locallyInstalledFacesLookupTable;
HashMap<String, FontSelectionHashMap, ASCIICaseInsensitiveHash> m_cache;
HashMap<StyleRuleFontFace*, CSSFontFace*> m_constituentCSSConnections;
size_t m_facesPartitionIndex { 0 }; Status m_status { Status::Loaded };
HashSet<CSSFontFaceSetClient*> m_clients;
WeakPtr<CSSFontSelector> m_owningFontSelector;
unsigned m_activeCount { 0 };
};
}