xref: /external/chromium_org/third_party/WebKit/Source/core/css/FontFace.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef FontFace_h
#define FontFace_h

#include "bindings/v8/ScriptPromise.h"
#include "core/CSSPropertyNames.h"
#include "core/css/CSSValue.h"
#include "core/dom/DOMError.h"
#include "platform/fonts/FontTraits.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/text/WTFString.h"

namespace WebCore {

class CSSFontFace;
class CSSValueList;
class Dictionary;
class Document;
class ExceptionState;
class FontFaceReadyPromiseResolver;
class StylePropertySet;
class StyleRuleFontFace;

class FontFace : public RefCountedWillBeGarbageCollectedFinalized<FontFace> {
public:
    enum LoadStatus { Unloaded, Loading, Loaded, Error };

    static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, PassRefPtr<ArrayBuffer> source, const Dictionary&, ExceptionState&);
    static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, PassRefPtr<ArrayBufferView>, const Dictionary&, ExceptionState&);
    static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, const String& source, const Dictionary&, ExceptionState&);
    static PassRefPtrWillBeRawPtr<FontFace> create(Document*, const StyleRuleFontFace*);

    ~FontFace();

    const AtomicString& family() const { return m_family; }
    String style() const;
    String weight() const;
    String stretch() const;
    String unicodeRange() const;
    String variant() const;
    String featureSettings() const;

    // FIXME: Changing these attributes should affect font matching.
    void setFamily(ExecutionContext*, const AtomicString& s, ExceptionState&) { m_family = s; }
    void setStyle(ExecutionContext*, const String&, ExceptionState&);
    void setWeight(ExecutionContext*, const String&, ExceptionState&);
    void setStretch(ExecutionContext*, const String&, ExceptionState&);
    void setUnicodeRange(ExecutionContext*, const String&, ExceptionState&);
    void setVariant(ExecutionContext*, const String&, ExceptionState&);
    void setFeatureSettings(ExecutionContext*, const String&, ExceptionState&);

    String status() const;
    ScriptPromise loaded(ScriptState* scriptState) { return fontStatusPromise(scriptState); }

    ScriptPromise load(ScriptState*);

    LoadStatus loadStatus() const { return m_status; }
    void setLoadStatus(LoadStatus);
    DOMError* error() const { return m_error.get(); }
    FontTraits traits() const;
    CSSFontFace* cssFontFace() { return m_cssFontFace.get(); }

    void trace(Visitor*);

    bool hadBlankText() const;

    class LoadFontCallback : public RefCountedWillBeGarbageCollectedFinalized<LoadFontCallback> {
    public:
        virtual ~LoadFontCallback() { }
        virtual void notifyLoaded(FontFace*) = 0;
        virtual void notifyError(FontFace*) = 0;
        virtual void trace(Visitor*) { }
    };
    void loadWithCallback(PassRefPtrWillBeRawPtr<LoadFontCallback>, ExecutionContext*);

private:
    FontFace();

    void initCSSFontFace(Document*, PassRefPtrWillBeRawPtr<CSSValue> src);
    void initCSSFontFace(const unsigned char* data, unsigned size);
    void setPropertyFromString(const Document*, const String&, CSSPropertyID, ExceptionState&);
    bool setPropertyFromStyle(const StylePropertySet&, CSSPropertyID);
    bool setPropertyValue(PassRefPtrWillBeRawPtr<CSSValue>, CSSPropertyID);
    bool setFamilyValue(CSSValueList*);
    void resolveReadyPromises();
    void loadInternal(ExecutionContext*);
    ScriptPromise fontStatusPromise(ScriptState*);

    AtomicString m_family;
    RefPtrWillBeMember<CSSValue> m_src;
    RefPtrWillBeMember<CSSValue> m_style;
    RefPtrWillBeMember<CSSValue> m_weight;
    RefPtrWillBeMember<CSSValue> m_stretch;
    RefPtrWillBeMember<CSSValue> m_unicodeRange;
    RefPtrWillBeMember<CSSValue> m_variant;
    RefPtrWillBeMember<CSSValue> m_featureSettings;
    LoadStatus m_status;
    RefPtrWillBeMember<DOMError> m_error;

    Vector<OwnPtr<FontFaceReadyPromiseResolver> > m_readyResolvers;
    OwnPtrWillBeMember<CSSFontFace> m_cssFontFace;
    WillBeHeapVector<RefPtrWillBeMember<LoadFontCallback> > m_callbacks;
};

typedef WillBeHeapVector<RefPtrWillBeMember<FontFace> > FontFaceArray;

} // namespace WebCore

#endif // FontFace_h