source: webkit/trunk/Source/WebCore/css/CSSFontStyleValue.h

/*
 * Copyright (C) 2017 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 "CSSPrimitiveValue.h"
#include "CSSValue.h"
#include "FontSelectionAlgorithm.h"

namespace WebCore {

class CSSFontStyleValue final : public CSSValue {
public:
    static Ref<CSSFontStyleValue> create(Ref<CSSPrimitiveValue>&& fontStyleValue)
    {
        return adoptRef(*new CSSFontStyleValue(WTFMove(fontStyleValue), nullptr));
    }
    static Ref<CSSFontStyleValue> create(Ref<CSSPrimitiveValue>&& fontStyleValue, RefPtr<CSSPrimitiveValue>&& obliqueValue)
    {
        return adoptRef(*new CSSFontStyleValue(WTFMove(fontStyleValue), WTFMove(obliqueValue)));
    }

    String customCSSText() const;

    bool equals(const CSSFontStyleValue&) const;

    bool isItalicOrOblique() const
    {
        if (!obliqueValue) {
            auto valueID = fontStyleValue->valueID();
            return valueID == CSSValueItalic || valueID == CSSValueOblique;
        }
        return obliqueValue->value<float>(CSSUnitType::CSS_DEG) >= static_cast<float>(italicValue());
    }

    Ref<CSSPrimitiveValue> fontStyleValue;
    RefPtr<CSSPrimitiveValue> obliqueValue;

private:
    CSSFontStyleValue(Ref<CSSPrimitiveValue>&& fontStyleValue, RefPtr<CSSPrimitiveValue>&& obliqueValue)
        : CSSValue(FontStyleClass)
        , fontStyleValue(WTFMove(fontStyleValue))
        , obliqueValue(WTFMove(obliqueValue))
    {
    }
};

}

SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSFontStyleValue, isFontStyleValue())