Source/core/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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 *
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "config.h"

#include "core/html/shadow/MeterShadowElement.h"

#include "CSSPropertyNames.h"
#include "HTMLNames.h"
#include "core/html/HTMLMeterElement.h"
#include "core/rendering/RenderMeter.h"
#include "core/rendering/RenderTheme.h"

namespace WebCore {

using namespace HTMLNames;

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

HTMLMeterElement* MeterShadowElement::meterElement() const
{
    return toHTMLMeterElement(shadowHost());
}

bool MeterShadowElement::rendererIsNeeded(const NodeRenderingContext& context)
{
    RenderObject* render = meterElement()->renderer();
    return render && !render->theme()->supportsMeter(render->style()->appearance()) && HTMLDivElement::rendererIsNeeded(context);
}

inline MeterInnerElement::MeterInnerElement(Document* document)
    : MeterShadowElement(document)
{
}

PassRefPtr<MeterInnerElement> MeterInnerElement::create(Document* document)
{
    RefPtr<MeterInnerElement> element = adoptRef(new MeterInnerElement(document));
    element->setPart(AtomicString("-webkit-meter-inner-element", AtomicString::ConstructFromLiteral));
    return element.release();
}

bool MeterInnerElement::rendererIsNeeded(const NodeRenderingContext& context)
{
    if (meterElement()->hasAuthorShadowRoot())
        return HTMLDivElement::rendererIsNeeded(context);

    RenderObject* render = meterElement()->renderer();
    return render && !render->theme()->supportsMeter(render->style()->appearance()) && HTMLDivElement::rendererIsNeeded(context);
}

RenderObject* MeterInnerElement::createRenderer(RenderStyle*)
{
    return new RenderMeter(this);
}

inline MeterBarElement::MeterBarElement(Document* document)
    : MeterShadowElement(document)
{
}

PassRefPtr<MeterBarElement> MeterBarElement::create(Document* document)
{
    RefPtr<MeterBarElement> element = adoptRef(new MeterBarElement(document));
    element->setPart(AtomicString("-webkit-meter-bar", AtomicString::ConstructFromLiteral));
    return element.release();
}

inline MeterValueElement::MeterValueElement(Document* document)
    : MeterShadowElement(document)
{
}

PassRefPtr<MeterValueElement> MeterValueElement::create(Document* document)
{
    RefPtr<MeterValueElement> element = adoptRef(new MeterValueElement(document));
    element->updatePseudo();
    return element.release();
}

const AtomicString& MeterValueElement::valuePseudoId() const
{
    DEFINE_STATIC_LOCAL(AtomicString, optimumPseudoId, ("-webkit-meter-optimum-value", AtomicString::ConstructFromLiteral));
    DEFINE_STATIC_LOCAL(AtomicString, suboptimumPseudoId, ("-webkit-meter-suboptimum-value", AtomicString::ConstructFromLiteral));
    DEFINE_STATIC_LOCAL(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);
}

}