Source/core/css/resolver/StyleBuilderConverter.cpp

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
 *
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 * notice, this list of conditions and the following disclaimer.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 THE COPYRIGHT
 * OWNER 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,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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#include "config.h"
#include "core/css/resolver/StyleBuilderConverter.h"

#include "core/css/CSSPrimitiveValueMappings.h"
#include "core/css/CSSShadowValue.h"
#include "core/css/Pair.h"
#include "core/svg/SVGURIReference.h"

namespace WebCore {

AtomicString StyleBuilderConverter::convertFragmentIdentifier(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    if (primitiveValue->isURI())
        return SVGURIReference::fragmentIdentifierFromIRIString(primitiveValue->getStringValue(), state.document());
    return nullAtom;
}

Length StyleBuilderConverter::convertLength(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    Length result = primitiveValue->convertToLength<FixedConversion | PercentConversion>(state.cssToLengthConversionData());
    result.setQuirk(primitiveValue->isQuirkValue());
    return result;
}

Length StyleBuilderConverter::convertLengthOrAuto(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    Length result = primitiveValue->convertToLength<FixedConversion | PercentConversion | AutoConversion>(state.cssToLengthConversionData());
    result.setQuirk(primitiveValue->isQuirkValue());
    return result;
}

Length StyleBuilderConverter::convertLengthSizing(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    switch (primitiveValue->getValueID()) {
    case CSSValueInvalid:
        return convertLength(state, value);
    case CSSValueIntrinsic:
        return Length(Intrinsic);
    case CSSValueMinIntrinsic:
        return Length(MinIntrinsic);
    case CSSValueWebkitMinContent:
        return Length(MinContent);
    case CSSValueWebkitMaxContent:
        return Length(MaxContent);
    case CSSValueWebkitFillAvailable:
        return Length(FillAvailable);
    case CSSValueWebkitFitContent:
        return Length(FitContent);
    case CSSValueAuto:
        return Length(Auto);
    default:
        ASSERT_NOT_REACHED();
        return Length();
    }
}

Length StyleBuilderConverter::convertLengthMaxSizing(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    if (primitiveValue->getValueID() == CSSValueNone)
        return Length(Undefined);
    return convertLengthSizing(state, value);
}

LengthPoint StyleBuilderConverter::convertLengthPoint(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    Pair* pair = primitiveValue->getPairValue();
    Length x = pair->first()->convertToLength<FixedConversion | PercentConversion>(state.cssToLengthConversionData());
    Length y = pair->second()->convertToLength<FixedConversion | PercentConversion>(state.cssToLengthConversionData());
    return LengthPoint(x, y);
}

float StyleBuilderConverter::convertNumberOrPercentage(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    ASSERT(primitiveValue->isNumber() || primitiveValue->isPercentage());
    if (primitiveValue->isNumber())
        return primitiveValue->getFloatValue();
    return primitiveValue->getFloatValue() / 100.0f;
}

LengthSize StyleBuilderConverter::convertRadius(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    Pair* pair = primitiveValue->getPairValue();
    Length radiusWidth = pair->first()->convertToLength<FixedConversion | PercentConversion>(state.cssToLengthConversionData());
    Length radiusHeight = pair->second()->convertToLength<FixedConversion | PercentConversion>(state.cssToLengthConversionData());
    float width = radiusWidth.value();
    float height = radiusHeight.value();
    ASSERT(width >= 0 && height >= 0);
    if (width <= 0 || height <= 0)
        return LengthSize(Length(0, Fixed), Length(0, Fixed));
    return LengthSize(radiusWidth, radiusHeight);
}

PassRefPtr<ShadowList> StyleBuilderConverter::convertShadow(StyleResolverState& state, CSSValue* value)
{
    if (value->isPrimitiveValue()) {
        ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueNone);
        return PassRefPtr<ShadowList>();
    }

    const CSSValueList* valueList = toCSSValueList(value);
    size_t shadowCount = valueList->length();
    ShadowDataVector shadows;
    for (size_t i = 0; i < shadowCount; ++i) {
        const CSSShadowValue* item = toCSSShadowValue(valueList->item(i));
        float x = item->x->computeLength<float>(state.cssToLengthConversionData());
        float y = item->y->computeLength<float>(state.cssToLengthConversionData());
        float blur = item->blur ? item->blur->computeLength<float>(state.cssToLengthConversionData()) : 0;
        float spread = item->spread ? item->spread->computeLength<float>(state.cssToLengthConversionData()) : 0;
        ShadowStyle shadowStyle = item->style && item->style->getValueID() == CSSValueInset ? Inset : Normal;
        Color color;
        if (item->color)
            color = state.document().textLinkColors().colorFromPrimitiveValue(item->color.get(), state.style()->color());
        else
            color = state.style()->color();
        shadows.append(ShadowData(FloatPoint(x, y), blur, spread, shadowStyle, color));
    }
    return ShadowList::adopt(shadows);
}

float StyleBuilderConverter::convertSpacing(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    if (primitiveValue->getValueID() == CSSValueNormal)
        return 0;
    if (state.useSVGZoomRules())
        return primitiveValue->computeLength<float>(state.cssToLengthConversionData().copyWithAdjustedZoom(1));
    return primitiveValue->computeLength<float>(state.cssToLengthConversionData());
}

PassRefPtr<SVGLength> StyleBuilderConverter::convertSVGLength(StyleResolverState&, CSSValue* value)
{
    return SVGLength::fromCSSPrimitiveValue(toCSSPrimitiveValue(value));
}

} // namespace WebCore