Source/WebCore/html/shadow/MeterShadowElement.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 *
 * 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
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#include "config.h"
#if ENABLE(METER_ELEMENT)
#include "MeterShadowElement.h"

#include "CSSPropertyNames.h"
#include "HTMLMeterElement.h"
#include "HTMLNames.h"
#include "RenderMeter.h"
#include "RenderTheme.h"
#include "ShadowRoot.h"
#include "StyleProperties.h"

namespace WebCore {

using namespace HTMLNames;

MeterShadowElement::MeterShadowElement(Document& document)
    : HTMLDivElement(HTMLNames::divTag, document)
{
}

HTMLMeterElement* MeterShadowElement::meterElement() const
{
    return downcast<HTMLMeterElement>(shadowHost());
}

bool MeterShadowElement::rendererIsNeeded(const RenderStyle& style)
{
    auto render = meterElement()->renderer();
    return render && !render->theme().supportsMeter(render->style().appearance()) && HTMLDivElement::rendererIsNeeded(style);
}

MeterInnerElement::MeterInnerElement(Document& document)
    : MeterShadowElement(document)
{
    static NeverDestroyed<AtomicString> pseudoId("-webkit-meter-inner-element", AtomicString::ConstructFromLiteral);
    setPseudo(pseudoId);
}

bool MeterInnerElement::rendererIsNeeded(const RenderStyle& style)
{
    auto render = meterElement()->renderer();
    return render && !render->theme().supportsMeter(render->style().appearance()) && HTMLDivElement::rendererIsNeeded(style);
}

RenderPtr<RenderElement> MeterInnerElement::createElementRenderer(std::unique_ptr<RenderStyle> style, const RenderTreePosition&)
{
    return createRenderer<RenderMeter>(*this, WTFMove(style));
}

const AtomicString& MeterValueElement::valuePseudoId() const
{
    static NeverDestroyed<AtomicString> optimumPseudoId("-webkit-meter-optimum-value", AtomicString::ConstructFromLiteral);
    static NeverDestroyed<AtomicString> suboptimumPseudoId("-webkit-meter-suboptimum-value", AtomicString::ConstructFromLiteral);
    static NeverDestroyed<AtomicString> evenLessGoodPseudoId("-webkit-meter-even-less-good-value", AtomicString::ConstructFromLiteral);

    HTMLMeterElement* meter = meterElement();
    if (!meter)
        return optimumPseudoId;

    switch (meter->gaugeRegion()) {
    case HTMLMeterElement::GaugeRegionOptimum:
        return optimumPseudoId;
    case HTMLMeterElement::GaugeRegionSuboptimal:
        return suboptimumPseudoId;
    case HTMLMeterElement::GaugeRegionEvenLessGood:
        return evenLessGoodPseudoId;
    default:
        ASSERT_NOT_REACHED();
        return optimumPseudoId;
    }
}

void MeterValueElement::setWidthPercentage(double width)
{
    setInlineStyleProperty(CSSPropertyWidth, width, CSSPrimitiveValue::CSS_PERCENTAGE);
}

}

#endif