/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
 * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
 * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
 * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
 * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
 * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
 * Copyright (C) Research In Motion Limited 2011. All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * 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,
 * 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.
 */

#include "core/CSSPropertyNames.h"
#include "core/CSSValueKeywords.h"
#include "core/StyleBuilderFunctions.h"
#include "core/StylePropertyShorthand.h"
#include "core/css/BasicShapeFunctions.h"
#include "core/css/CSSBasicShapeValues.h"
#include "core/css/CSSCounterValue.h"
#include "core/css/CSSCursorImageValue.h"
#include "core/css/CSSCustomPropertyDeclaration.h"
#include "core/css/CSSFunctionValue.h"
#include "core/css/CSSGradientValue.h"
#include "core/css/CSSGridTemplateAreasValue.h"
#include "core/css/CSSHelper.h"
#include "core/css/CSSImageSetValue.h"
#include "core/css/CSSPathValue.h"
#include "core/css/CSSPrimitiveValueMappings.h"
#include "core/css/CSSPropertyMetadata.h"
#include "core/css/CSSURIValue.h"
#include "core/css/CSSValuePair.h"
#include "core/css/CSSVariableReferenceValue.h"
#include "core/css/StylePropertySet.h"
#include "core/css/StyleRule.h"
#include "core/css/resolver/CSSVariableResolver.h"
#include "core/css/resolver/ElementStyleResources.h"
#include "core/css/resolver/FilterOperationResolver.h"
#include "core/css/resolver/FontBuilder.h"
#include "core/css/resolver/StyleBuilder.h"
#include "core/css/resolver/TransformBuilder.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Settings.h"
#include "core/style/CounterContent.h"
#include "core/style/ComputedStyle.h"
#include "core/style/ComputedStyleConstants.h"
#include "core/style/QuotesData.h"
#include "core/style/SVGComputedStyle.h"
#include "core/style/StyleGeneratedImage.h"
#include "core/style/StyleVariableData.h"
#include "platform/fonts/FontDescription.h"
#include "wtf/MathExtras.h"
#include "wtf/StdLibExtras.h"
#include "wtf/Vector.h"

namespace blink {

namespace {

static inline bool isValidVisitedLinkProperty(CSSPropertyID id)
{
    switch (id) {
    case CSSPropertyBackgroundColor:
    case CSSPropertyBorderLeftColor:
    case CSSPropertyBorderRightColor:
    case CSSPropertyBorderTopColor:
    case CSSPropertyBorderBottomColor:
    case CSSPropertyColor:
    case CSSPropertyFill:
    case CSSPropertyOutlineColor:
    case CSSPropertyStroke:
    case CSSPropertyTextDecorationColor:
    case CSSPropertyColumnRuleColor:
    case CSSPropertyWebkitTextEmphasisColor:
    case CSSPropertyWebkitTextFillColor:
    case CSSPropertyWebkitTextStrokeColor:
        return true;
    default:
        return false;
    }
}

} // namespace

void StyleBuilder::applyProperty(CSSPropertyID id, StyleResolverState& state, CSSValue* value)
{
    if (RuntimeEnabledFeatures::cssVariablesEnabled() && id != CSSPropertyVariable && value->isVariableReferenceValue()) {
        CSSVariableResolver::resolveAndApplyVariableReferences(state, id, *toCSSVariableReferenceValue(value));
        if (!state.style()->hasVariableReferenceFromNonInheritedProperty() && !CSSPropertyMetadata::isInheritedProperty(id))
            state.style()->setHasVariableReferenceFromNonInheritedProperty();
        return;
    }

    ASSERT_WITH_MESSAGE(!isShorthandProperty(id), "Shorthand property id = %d wasn't expanded at parsing time", id);

    bool isInherit = state.parentNode() && value->isInheritedValue();
    bool isInitial = value->isInitialValue() || (!state.parentNode() && value->isInheritedValue());

    ASSERT(!isInherit || !isInitial); // isInherit -> !isInitial && isInitial -> !isInherit
    ASSERT(!isInherit || (state.parentNode() && state.parentStyle())); // isInherit -> (state.parentNode() && state.parentStyle())

    if (!state.applyPropertyToRegularStyle() && (!state.applyPropertyToVisitedLinkStyle() || !isValidVisitedLinkProperty(id))) {
        // Limit the properties that can be applied to only the ones honored by :visited.
        return;
    }

    if (isInherit && !state.parentStyle()->hasExplicitlyInheritedProperties() && !CSSPropertyMetadata::isInheritedProperty(id)) {
        state.parentStyle()->setHasExplicitlyInheritedProperties();
    } else if (value->isUnsetValue()) {
        ASSERT(!isInherit && !isInitial);
        if (CSSPropertyMetadata::isInheritedProperty(id))
            isInherit = true;
        else
            isInitial = true;
    }

    StyleBuilder::applyProperty(id, state, value, isInitial, isInherit);
}

void StyleBuilderFunctions::applyInitialCSSPropertyColor(StyleResolverState& state)
{
    Color color = ComputedStyle::initialColor();
    if (state.applyPropertyToRegularStyle())
        state.style()->setColor(color);
    if (state.applyPropertyToVisitedLinkStyle())
        state.style()->setVisitedLinkColor(color);
}

void StyleBuilderFunctions::applyInheritCSSPropertyColor(StyleResolverState& state)
{
    Color color = state.parentStyle()->color();
    if (state.applyPropertyToRegularStyle())
        state.style()->setColor(color);
    if (state.applyPropertyToVisitedLinkStyle())
        state.style()->setVisitedLinkColor(color);
}

void StyleBuilderFunctions::applyValueCSSPropertyColor(StyleResolverState& state, CSSValue* value)
{
    // As per the spec, 'color: currentColor' is treated as 'color: inherit'
    if (value->isPrimitiveValue() && toCSSPrimitiveValue(value)->getValueID() == CSSValueCurrentcolor) {
        applyInheritCSSPropertyColor(state);
        return;
    }

    if (state.applyPropertyToRegularStyle())
        state.style()->setColor(StyleBuilderConverter::convertColor(state, *value));
    if (state.applyPropertyToVisitedLinkStyle())
        state.style()->setVisitedLinkColor(StyleBuilderConverter::convertColor(state, *value, true));
}

void StyleBuilderFunctions::applyInitialCSSPropertyCursor(StyleResolverState& state)
{
    state.style()->clearCursorList();
    state.style()->setCursor(ComputedStyle::initialCursor());
}

void StyleBuilderFunctions::applyInheritCSSPropertyCursor(StyleResolverState& state)
{
    state.style()->setCursor(state.parentStyle()->cursor());
    state.style()->setCursorList(state.parentStyle()->cursors());
}

void StyleBuilderFunctions::applyValueCSSPropertyCursor(StyleResolverState& state, CSSValue* value)
{
    state.style()->clearCursorList();
    if (value->isValueList()) {
        CSSValueList* list = toCSSValueList(value);
        int len = list->length();
        state.style()->setCursor(CURSOR_AUTO);
        for (int i = 0; i < len; i++) {
            CSSValue* item = list->item(i);
            if (item->isCursorImageValue()) {
                CSSCursorImageValue* image = toCSSCursorImageValue(item);
                if (image->updateIfSVGCursorIsUsed(state.element())) // Elements with SVG cursors are not allowed to share style.
                    state.style()->setUnique();
                state.style()->addCursor(state.styleImage(CSSPropertyCursor, *image), image->hotSpotSpecified(), image->hotSpot());
            } else {
                state.style()->setCursor(toCSSPrimitiveValue(item)->convertTo<ECursor>());
            }
        }
    } else {
        state.style()->setCursor(toCSSPrimitiveValue(value)->convertTo<ECursor>());
    }
}

void StyleBuilderFunctions::applyValueCSSPropertyDirection(StyleResolverState& state, CSSValue* value)
{
    state.style()->setDirection(toCSSPrimitiveValue(value)->convertTo<TextDirection>());
}

void StyleBuilderFunctions::applyInitialCSSPropertyGridTemplateAreas(StyleResolverState& state)
{
    state.style()->setNamedGridArea(ComputedStyle::initialNamedGridArea());
    state.style()->setNamedGridAreaRowCount(ComputedStyle::initialNamedGridAreaCount());
    state.style()->setNamedGridAreaColumnCount(ComputedStyle::initialNamedGridAreaCount());
}

void StyleBuilderFunctions::applyInheritCSSPropertyGridTemplateAreas(StyleResolverState& state)
{
    state.style()->setNamedGridArea(state.parentStyle()->namedGridArea());
    state.style()->setNamedGridAreaRowCount(state.parentStyle()->namedGridAreaRowCount());
    state.style()->setNamedGridAreaColumnCount(state.parentStyle()->namedGridAreaColumnCount());
}

void StyleBuilderFunctions::applyValueCSSPropertyGridTemplateAreas(StyleResolverState& state, CSSValue* value)
{
    if (value->isPrimitiveValue()) {
        // FIXME: Shouldn't we clear the grid-area values
        ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueNone);
        return;
    }

    CSSGridTemplateAreasValue* gridTemplateAreasValue = toCSSGridTemplateAreasValue(value);
    const NamedGridAreaMap& newNamedGridAreas = gridTemplateAreasValue->gridAreaMap();

    NamedGridLinesMap namedGridColumnLines;
    NamedGridLinesMap namedGridRowLines;
    StyleBuilderConverter::convertOrderedNamedGridLinesMapToNamedGridLinesMap(state.style()->orderedNamedGridColumnLines(), namedGridColumnLines);
    StyleBuilderConverter::convertOrderedNamedGridLinesMapToNamedGridLinesMap(state.style()->orderedNamedGridRowLines(), namedGridRowLines);
    StyleBuilderConverter::createImplicitNamedGridLinesFromGridArea(newNamedGridAreas, namedGridColumnLines, ForColumns);
    StyleBuilderConverter::createImplicitNamedGridLinesFromGridArea(newNamedGridAreas, namedGridRowLines, ForRows);
    state.style()->setNamedGridColumnLines(namedGridColumnLines);
    state.style()->setNamedGridRowLines(namedGridRowLines);

    state.style()->setNamedGridArea(newNamedGridAreas);
    state.style()->setNamedGridAreaRowCount(gridTemplateAreasValue->rowCount());
    state.style()->setNamedGridAreaColumnCount(gridTemplateAreasValue->columnCount());
}

void StyleBuilderFunctions::applyValueCSSPropertyListStyleImage(StyleResolverState& state, CSSValue* value)
{
    state.style()->setListStyleImage(state.styleImage(CSSPropertyListStyleImage, *value));
}

void StyleBuilderFunctions::applyInitialCSSPropertyOutlineStyle(StyleResolverState& state)
{
    state.style()->setOutlineStyleIsAuto(ComputedStyle::initialOutlineStyleIsAuto());
    state.style()->setOutlineStyle(ComputedStyle::initialBorderStyle());
}

void StyleBuilderFunctions::applyInheritCSSPropertyOutlineStyle(StyleResolverState& state)
{
    state.style()->setOutlineStyleIsAuto(state.parentStyle()->outlineStyleIsAuto());
    state.style()->setOutlineStyle(state.parentStyle()->outlineStyle());
}

void StyleBuilderFunctions::applyValueCSSPropertyOutlineStyle(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    state.style()->setOutlineStyleIsAuto(primitiveValue->convertTo<OutlineIsAuto>());
    state.style()->setOutlineStyle(primitiveValue->convertTo<EBorderStyle>());
}

void StyleBuilderFunctions::applyValueCSSPropertyResize(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);

    EResize r = RESIZE_NONE;
    if (primitiveValue->getValueID() == CSSValueAuto) {
        if (Settings* settings = state.document().settings())
            r = settings->textAreasAreResizable() ? RESIZE_BOTH : RESIZE_NONE;
    } else {
        r = primitiveValue->convertTo<EResize>();
    }
    state.style()->setResize(r);
}

static float mmToPx(float mm) { return mm * cssPixelsPerMillimeter; }
static float inchToPx(float inch) { return inch * cssPixelsPerInch; }
static FloatSize getPageSizeFromName(CSSPrimitiveValue* pageSizeName)
{
    switch (pageSizeName->getValueID()) {
    case CSSValueA5:
        return FloatSize(mmToPx(148), mmToPx(210));
    case CSSValueA4:
        return FloatSize(mmToPx(210), mmToPx(297));
    case CSSValueA3:
        return FloatSize(mmToPx(297), mmToPx(420));
    case CSSValueB5:
        return FloatSize(mmToPx(176), mmToPx(250));
    case CSSValueB4:
        return FloatSize(mmToPx(250), mmToPx(353));
    case CSSValueLetter:
        return FloatSize(inchToPx(8.5), inchToPx(11));
    case CSSValueLegal:
        return FloatSize(inchToPx(8.5), inchToPx(14));
    case CSSValueLedger:
        return FloatSize(inchToPx(11), inchToPx(17));
    default:
        ASSERT_NOT_REACHED();
        return FloatSize(0, 0);
    }
}

void StyleBuilderFunctions::applyInitialCSSPropertySize(StyleResolverState&) { }
void StyleBuilderFunctions::applyInheritCSSPropertySize(StyleResolverState&) { }
void StyleBuilderFunctions::applyValueCSSPropertySize(StyleResolverState& state, CSSValue* value)
{
    state.style()->resetPageSizeType();
    FloatSize size;
    PageSizeType pageSizeType = PAGE_SIZE_AUTO;
    CSSValueList* list = toCSSValueList(value);
    if (list->length() == 2) {
        // <length>{2} | <page-size> <orientation>
        CSSPrimitiveValue* first = toCSSPrimitiveValue(list->item(0));
        CSSPrimitiveValue* second = toCSSPrimitiveValue(list->item(1));
        if (first->isLength()) {
            // <length>{2}
            size = FloatSize(first->computeLength<float>(state.cssToLengthConversionData().copyWithAdjustedZoom(1.0)),
                second->computeLength<float>(state.cssToLengthConversionData().copyWithAdjustedZoom(1.0)));
        } else {
            // <page-size> <orientation>
            size = getPageSizeFromName(first);

            ASSERT(second->getValueID() == CSSValueLandscape || second->getValueID() == CSSValuePortrait);
            if (second->getValueID() == CSSValueLandscape)
                size = size.transposedSize();
        }
        pageSizeType = PAGE_SIZE_RESOLVED;
    } else {
        ASSERT(list->length() == 1);
        // <length> | auto | <page-size> | [ portrait | landscape]
        CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(list->item(0));
        if (primitiveValue->isLength()) {
            // <length>
            pageSizeType = PAGE_SIZE_RESOLVED;
            float width = primitiveValue->computeLength<float>(state.cssToLengthConversionData().copyWithAdjustedZoom(1.0));
            size = FloatSize(width, width);
        } else {
            switch (primitiveValue->getValueID()) {
            case CSSValueAuto:
                pageSizeType = PAGE_SIZE_AUTO;
                break;
            case CSSValuePortrait:
                pageSizeType = PAGE_SIZE_AUTO_PORTRAIT;
                break;
            case CSSValueLandscape:
                pageSizeType = PAGE_SIZE_AUTO_LANDSCAPE;
                break;
            default:
                // <page-size>
                pageSizeType = PAGE_SIZE_RESOLVED;
                size = getPageSizeFromName(primitiveValue);
            }
        }
    }
    state.style()->setPageSizeType(pageSizeType);
    state.style()->setPageSize(size);
}

void StyleBuilderFunctions::applyInitialCSSPropertySnapHeight(StyleResolverState& state)
{
    state.style()->setSnapHeightUnit(0);
    state.style()->setSnapHeightPosition(0);
}

void StyleBuilderFunctions::applyInheritCSSPropertySnapHeight(StyleResolverState& state)
{
    state.style()->setSnapHeightUnit(state.parentStyle()->snapHeightUnit());
    state.style()->setSnapHeightPosition(state.parentStyle()->snapHeightPosition());
}

void StyleBuilderFunctions::applyValueCSSPropertySnapHeight(StyleResolverState& state, CSSValue* value)
{
    CSSValueList* list = toCSSValueList(value);
    CSSPrimitiveValue* first = toCSSPrimitiveValue(list->item(0));
    ASSERT(first->isLength());
    int unit = first->computeLength<int>(state.cssToLengthConversionData());
    ASSERT(unit >= 0);
    state.style()->setSnapHeightUnit(clampTo<uint8_t>(unit));

    if (list->length() == 1) {
        state.style()->setSnapHeightPosition(0);
        return;
    }

    ASSERT(list->length() == 2);
    CSSPrimitiveValue* second = toCSSPrimitiveValue(list->item(1));
    ASSERT(second->isNumber());
    int position = second->getIntValue();
    ASSERT(position > 0 && position <= 100);
    state.style()->setSnapHeightPosition(position);
}

void StyleBuilderFunctions::applyValueCSSPropertyTextAlign(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    if (primitiveValue->isValueID() && primitiveValue->getValueID() != CSSValueWebkitMatchParent)
        state.style()->setTextAlign(primitiveValue->convertTo<ETextAlign>());
    else if (state.parentStyle()->textAlign() == TASTART)
        state.style()->setTextAlign(state.parentStyle()->isLeftToRightDirection() ? LEFT : RIGHT);
    else if (state.parentStyle()->textAlign() == TAEND)
        state.style()->setTextAlign(state.parentStyle()->isLeftToRightDirection() ? RIGHT : LEFT);
    else
        state.style()->setTextAlign(state.parentStyle()->textAlign());
}

void StyleBuilderFunctions::applyInheritCSSPropertyTextIndent(StyleResolverState& state)
{
    state.style()->setTextIndent(state.parentStyle()->textIndent());
    state.style()->setTextIndentLine(state.parentStyle()->textIndentLine());
    state.style()->setTextIndentType(state.parentStyle()->textIndentType());
}

void StyleBuilderFunctions::applyInitialCSSPropertyTextIndent(StyleResolverState& state)
{
    state.style()->setTextIndent(ComputedStyle::initialTextIndent());
    state.style()->setTextIndentLine(ComputedStyle::initialTextIndentLine());
    state.style()->setTextIndentType(ComputedStyle::initialTextIndentType());
}

void StyleBuilderFunctions::applyValueCSSPropertyTextIndent(StyleResolverState& state, CSSValue* value)
{
    Length lengthOrPercentageValue;
    TextIndentLine textIndentLineValue = ComputedStyle::initialTextIndentLine();
    TextIndentType textIndentTypeValue = ComputedStyle::initialTextIndentType();

    for (auto& listValue : toCSSValueList(*value)) {
        CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(listValue.get());
        if (!primitiveValue->getValueID())
            lengthOrPercentageValue = primitiveValue->convertToLength(state.cssToLengthConversionData());
        else if (primitiveValue->getValueID() == CSSValueEachLine)
            textIndentLineValue = TextIndentEachLine;
        else if (primitiveValue->getValueID() == CSSValueHanging)
            textIndentTypeValue = TextIndentHanging;
        else
            ASSERT_NOT_REACHED();
    }

    state.style()->setTextIndent(lengthOrPercentageValue);
    state.style()->setTextIndentLine(textIndentLineValue);
    state.style()->setTextIndentType(textIndentTypeValue);
}

void StyleBuilderFunctions::applyValueCSSPropertyTransform(StyleResolverState& state, CSSValue* value)
{
    // FIXME: We should just make this a converter
    TransformOperations operations;
    TransformBuilder::createTransformOperations(*value, state.cssToLengthConversionData(), operations);
    state.style()->setTransform(operations);
}

void StyleBuilderFunctions::applyInheritCSSPropertyVerticalAlign(StyleResolverState& state)
{
    EVerticalAlign verticalAlign = state.parentStyle()->verticalAlign();
    state.style()->setVerticalAlign(verticalAlign);
    if (verticalAlign == LENGTH)
        state.style()->setVerticalAlignLength(state.parentStyle()->verticalAlignLength());
}

void StyleBuilderFunctions::applyValueCSSPropertyVerticalAlign(StyleResolverState& state, CSSValue* value)
{
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);

    if (primitiveValue->getValueID())
        state.style()->setVerticalAlign(primitiveValue->convertTo<EVerticalAlign>());
    else
        state.style()->setVerticalAlignLength(primitiveValue->convertToLength(state.cssToLengthConversionData()));
}

static void resetEffectiveZoom(StyleResolverState& state)
{
    // Reset the zoom in effect. This allows the setZoom method to accurately compute a new zoom in effect.
    state.setEffectiveZoom(state.parentStyle() ? state.parentStyle()->effectiveZoom() : ComputedStyle::initialZoom());
}

void StyleBuilderFunctions::applyInitialCSSPropertyZoom(StyleResolverState& state)
{
    resetEffectiveZoom(state);
    state.setZoom(ComputedStyle::initialZoom());
}

void StyleBuilderFunctions::applyInheritCSSPropertyZoom(StyleResolverState& state)
{
    resetEffectiveZoom(state);
    state.setZoom(state.parentStyle()->zoom());
}

void StyleBuilderFunctions::applyValueCSSPropertyZoom(StyleResolverState& state, CSSValue* value)
{
    ASSERT_WITH_SECURITY_IMPLICATION(value->isPrimitiveValue());
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);

    if (primitiveValue->getValueID() == CSSValueNormal) {
        resetEffectiveZoom(state);
        state.setZoom(ComputedStyle::initialZoom());
    } else if (primitiveValue->getValueID() == CSSValueReset) {
        state.setEffectiveZoom(ComputedStyle::initialZoom());
        state.setZoom(ComputedStyle::initialZoom());
    } else if (primitiveValue->getValueID() == CSSValueDocument) {
        float docZoom = state.rootElementStyle() ? state.rootElementStyle()->zoom() : ComputedStyle::initialZoom();
        state.setEffectiveZoom(docZoom);
        state.setZoom(docZoom);
    } else if (primitiveValue->isPercentage()) {
        resetEffectiveZoom(state);
        if (float percent = primitiveValue->getFloatValue())
            state.setZoom(percent / 100.0f);
    } else if (primitiveValue->isNumber()) {
        resetEffectiveZoom(state);
        if (float number = primitiveValue->getFloatValue())
            state.setZoom(number);
    }
}

void StyleBuilderFunctions::applyValueCSSPropertyWebkitBorderImage(StyleResolverState& state, CSSValue* value)
{
    NinePieceImage image;
    CSSToStyleMap::mapNinePieceImage(state, CSSPropertyWebkitBorderImage, *value, image);
    state.style()->setBorderImage(image);
}

void StyleBuilderFunctions::applyValueCSSPropertyWebkitClipPath(StyleResolverState& state, CSSValue* value)
{
    if (value->isBasicShapeValue()) {
        state.style()->setClipPath(ShapeClipPathOperation::create(basicShapeForValue(state, *value)));
    }
    if (value->isPrimitiveValue() && toCSSPrimitiveValue(value)->getValueID() == CSSValueNone) {
        state.style()->setClipPath(nullptr);
    }
    if (value->isURIValue()) {
        String cssURLValue = toCSSURIValue(value)->value();
        KURL url = state.document().completeURL(cssURLValue);
        // FIXME: It doesn't work with forward or external SVG references (see https://bugs.webkit.org/show_bug.cgi?id=90405)
        state.style()->setClipPath(ReferenceClipPathOperation::create(cssURLValue, AtomicString(url.fragmentIdentifier())));
    }
}

void StyleBuilderFunctions::applyInitialCSSPropertyWebkitTextEmphasisStyle(StyleResolverState& state)
{
    state.style()->setTextEmphasisFill(ComputedStyle::initialTextEmphasisFill());
    state.style()->setTextEmphasisMark(ComputedStyle::initialTextEmphasisMark());
    state.style()->setTextEmphasisCustomMark(ComputedStyle::initialTextEmphasisCustomMark());
}

void StyleBuilderFunctions::applyInheritCSSPropertyWebkitTextEmphasisStyle(StyleResolverState& state)
{
    state.style()->setTextEmphasisFill(state.parentStyle()->textEmphasisFill());
    state.style()->setTextEmphasisMark(state.parentStyle()->textEmphasisMark());
    state.style()->setTextEmphasisCustomMark(state.parentStyle()->textEmphasisCustomMark());
}

void StyleBuilderFunctions::applyValueCSSPropertyWebkitTextEmphasisStyle(StyleResolverState& state, CSSValue* value)
{
    if (value->isValueList()) {
        CSSValueList* list = toCSSValueList(value);
        ASSERT(list->length() == 2);
        for (unsigned i = 0; i < 2; ++i) {
            CSSPrimitiveValue* value = toCSSPrimitiveValue(list->item(i));
            if (value->getValueID() == CSSValueFilled || value->getValueID() == CSSValueOpen)
                state.style()->setTextEmphasisFill(value->convertTo<TextEmphasisFill>());
            else
                state.style()->setTextEmphasisMark(value->convertTo<TextEmphasisMark>());
        }
        state.style()->setTextEmphasisCustomMark(nullAtom);
        return;
    }

    if (value->isStringValue()) {
        state.style()->setTextEmphasisFill(TextEmphasisFillFilled);
        state.style()->setTextEmphasisMark(TextEmphasisMarkCustom);
        state.style()->setTextEmphasisCustomMark(AtomicString(toCSSStringValue(value)->value()));
        return;
    }

    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);

    state.style()->setTextEmphasisCustomMark(nullAtom);

    if (primitiveValue->getValueID() == CSSValueFilled || primitiveValue->getValueID() == CSSValueOpen) {
        state.style()->setTextEmphasisFill(primitiveValue->convertTo<TextEmphasisFill>());
        state.style()->setTextEmphasisMark(TextEmphasisMarkAuto);
    } else {
        state.style()->setTextEmphasisFill(TextEmphasisFillFilled);
        state.style()->setTextEmphasisMark(primitiveValue->convertTo<TextEmphasisMark>());
    }
}

void StyleBuilderFunctions::applyInitialCSSPropertyWillChange(StyleResolverState& state)
{
    state.style()->setWillChangeContents(false);
    state.style()->setWillChangeScrollPosition(false);
    state.style()->setWillChangeProperties(Vector<CSSPropertyID>());
    state.style()->setSubtreeWillChangeContents(state.parentStyle()->subtreeWillChangeContents());
}

void StyleBuilderFunctions::applyInheritCSSPropertyWillChange(StyleResolverState& state)
{
    state.style()->setWillChangeContents(state.parentStyle()->willChangeContents());
    state.style()->setWillChangeScrollPosition(state.parentStyle()->willChangeScrollPosition());
    state.style()->setWillChangeProperties(state.parentStyle()->willChangeProperties());
    state.style()->setSubtreeWillChangeContents(state.parentStyle()->subtreeWillChangeContents());
}

void StyleBuilderFunctions::applyValueCSSPropertyWillChange(StyleResolverState& state, CSSValue* value)
{
    bool willChangeContents = false;
    bool willChangeScrollPosition = false;
    Vector<CSSPropertyID> willChangeProperties;

    if (value->isPrimitiveValue()) {
        ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueAuto);
    } else {
        ASSERT(value->isValueList());
        for (auto& willChangeValue : toCSSValueList(*value)) {
            if (willChangeValue->isCustomIdentValue())
                willChangeProperties.append(toCSSCustomIdentValue(*willChangeValue).valueAsPropertyID());
            else if (toCSSPrimitiveValue(*willChangeValue).getValueID() == CSSValueContents)
                willChangeContents = true;
            else if (toCSSPrimitiveValue(*willChangeValue).getValueID() == CSSValueScrollPosition)
                willChangeScrollPosition = true;
            else
                ASSERT_NOT_REACHED();
        }
    }
    state.style()->setWillChangeContents(willChangeContents);
    state.style()->setWillChangeScrollPosition(willChangeScrollPosition);
    state.style()->setWillChangeProperties(willChangeProperties);
    state.style()->setSubtreeWillChangeContents(willChangeContents || state.parentStyle()->subtreeWillChangeContents());
}

void StyleBuilderFunctions::applyInitialCSSPropertyContent(StyleResolverState& state)
{
    state.style()->clearContent();
}

void StyleBuilderFunctions::applyInheritCSSPropertyContent(StyleResolverState&)
{
    // FIXME: In CSS3, it will be possible to inherit content. In CSS2 it is not. This
    // note is a reminder that eventually "inherit" needs to be supported.
}

void StyleBuilderFunctions::applyValueCSSPropertyContent(StyleResolverState& state, CSSValue* value)
{
    // list of string, uri, counter, attr, i

    bool didSet = false;
    for (auto& item : toCSSValueList(*value)) {
        if (item->isImageGeneratorValue()) {
            state.style()->setContent(StyleGeneratedImage::create(toCSSImageGeneratorValue(*item)), didSet);
            didSet = true;
        } else if (item->isImageSetValue()) {
            state.style()->setContent(state.elementStyleResources().setOrPendingFromValue(CSSPropertyContent, toCSSImageSetValue(*item)), didSet);
            didSet = true;
        }

        if (item->isImageValue()) {
            state.style()->setContent(state.elementStyleResources().cachedOrPendingFromValue(CSSPropertyContent, toCSSImageValue(*item)), didSet);
            didSet = true;
            continue;
        }

        if (item->isCounterValue()) {
            CSSCounterValue* counterValue = toCSSCounterValue(item.get());
            EListStyleType listStyleType = NoneListStyle;
            CSSValueID listStyleIdent = counterValue->listStyle();
            if (listStyleIdent != CSSValueNone)
                listStyleType = static_cast<EListStyleType>(listStyleIdent - CSSValueDisc);
            OwnPtr<CounterContent> counter = adoptPtr(new CounterContent(AtomicString(counterValue->identifier()), listStyleType, AtomicString(counterValue->separator())));
            state.style()->setContent(counter.release(), didSet);
            didSet = true;
        }

        if (item->isFunctionValue()) {
            CSSFunctionValue* functionValue = toCSSFunctionValue(item.get());
            ASSERT(functionValue->functionType() == CSSValueAttr);
            // FIXME: Can a namespace be specified for an attr(foo)?
            if (state.style()->styleType() == NOPSEUDO)
                state.style()->setUnique();
            else
                state.parentStyle()->setUnique();
            QualifiedName attr(nullAtom, AtomicString(toCSSCustomIdentValue(functionValue->item(0))->value()), nullAtom);
            const AtomicString& value = state.element()->getAttribute(attr);
            state.style()->setContent(value.isNull() ? emptyString() : value.string(), didSet);
            didSet = true;
        }

        if (!item->isPrimitiveValue() && !item->isStringValue())
            continue;

        if (item->isStringValue()) {
            state.style()->setContent(toCSSStringValue(*item).value().impl(), didSet);
            didSet = true;
        } else {
            switch (toCSSPrimitiveValue(*item).getValueID()) {
            case CSSValueOpenQuote:
                state.style()->setContent(OPEN_QUOTE, didSet);
                didSet = true;
                break;
            case CSSValueCloseQuote:
                state.style()->setContent(CLOSE_QUOTE, didSet);
                didSet = true;
                break;
            case CSSValueNoOpenQuote:
                state.style()->setContent(NO_OPEN_QUOTE, didSet);
                didSet = true;
                break;
            case CSSValueNoCloseQuote:
                state.style()->setContent(NO_CLOSE_QUOTE, didSet);
                didSet = true;
                break;
            default:
                // normal and none do not have any effect.
                { }
            }
        }
    }
    if (!didSet)
        state.style()->clearContent();
}

void StyleBuilderFunctions::applyValueCSSPropertyWebkitLocale(StyleResolverState& state, CSSValue* value)
{
    if (value->isPrimitiveValue()) {
        ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueAuto);
        state.fontBuilder().setLocale(nullAtom);
    } else {
        state.fontBuilder().setLocale(AtomicString(toCSSStringValue(value)->value()));
    }
}

void StyleBuilderFunctions::applyInitialCSSPropertyWebkitAppRegion(StyleResolverState&)
{
}

void StyleBuilderFunctions::applyInheritCSSPropertyWebkitAppRegion(StyleResolverState&)
{
}

void StyleBuilderFunctions::applyValueCSSPropertyWebkitAppRegion(StyleResolverState& state, CSSValue* value)
{
    const CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    state.style()->setDraggableRegionMode(primitiveValue->getValueID() == CSSValueDrag ? DraggableRegionDrag : DraggableRegionNoDrag);
    state.document().setHasAnnotatedRegions(true);
}

void StyleBuilderFunctions::applyValueCSSPropertyWritingMode(StyleResolverState& state, CSSValue* value)
{
    state.setWritingMode(toCSSPrimitiveValue(value)->convertTo<WritingMode>());
}

void StyleBuilderFunctions::applyValueCSSPropertyWebkitWritingMode(StyleResolverState& state, CSSValue* value)
{
    state.setWritingMode(toCSSPrimitiveValue(value)->convertTo<WritingMode>());
}

void StyleBuilderFunctions::applyValueCSSPropertyTextOrientation(StyleResolverState& state, CSSValue* value)
{
    state.setTextOrientation(toCSSPrimitiveValue(value)->convertTo<TextOrientation>());
}

void StyleBuilderFunctions::applyValueCSSPropertyWebkitTextOrientation(StyleResolverState& state, CSSValue* value)
{
    state.setTextOrientation(toCSSPrimitiveValue(value)->convertTo<TextOrientation>());
}

void StyleBuilderFunctions::applyValueCSSPropertyVariable(StyleResolverState& state, CSSValue* value)
{
    CSSCustomPropertyDeclaration* declaration = toCSSCustomPropertyDeclaration(value);
    switch (declaration->id()) {
    case CSSValueInitial:
        state.style()->removeVariable(declaration->name());
        break;

    case CSSValueUnset:
    case CSSValueInherit: {
        state.style()->removeVariable(declaration->name());
        StyleVariableData* parentVariables = state.parentStyle()->variables();
        if (!parentVariables)
            return;
        CSSVariableData* value = parentVariables->getVariable(declaration->name());
        if (!value)
            return;
        state.style()->setVariable(declaration->name(), value);
        break;
    }
    case CSSValueInternalVariableValue:
        state.style()->setVariable(declaration->name(), declaration->value());
        break;
    default:
        ASSERT_NOT_REACHED();
    }
}

void StyleBuilderFunctions::applyInheritCSSPropertyBaselineShift(StyleResolverState& state)
{
    const SVGComputedStyle& parentSvgStyle = state.parentStyle()->svgStyle();
    EBaselineShift baselineShift = parentSvgStyle.baselineShift();
    SVGComputedStyle& svgStyle = state.style()->accessSVGStyle();
    svgStyle.setBaselineShift(baselineShift);
    if (baselineShift == BS_LENGTH)
        svgStyle.setBaselineShiftValue(parentSvgStyle.baselineShiftValue());
}

void StyleBuilderFunctions::applyValueCSSPropertyBaselineShift(StyleResolverState& state, CSSValue* value)
{
    SVGComputedStyle& svgStyle = state.style()->accessSVGStyle();
    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    if (!primitiveValue->isValueID()) {
        svgStyle.setBaselineShift(BS_LENGTH);
        svgStyle.setBaselineShiftValue(StyleBuilderConverter::convertLength(state, *primitiveValue));
        return;
    }
    switch (primitiveValue->getValueID()) {
    case CSSValueBaseline:
        svgStyle.setBaselineShift(BS_LENGTH);
        svgStyle.setBaselineShiftValue(Length(Fixed));
        return;
    case CSSValueSub:
        svgStyle.setBaselineShift(BS_SUB);
        return;
    case CSSValueSuper:
        svgStyle.setBaselineShift(BS_SUPER);
        return;
    default:
        ASSERT_NOT_REACHED();
    }
}

} // namespace blink