Source/core/css/CSSToLengthConversionData.cpp

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#include "config.h"
#include "core/css/CSSToLengthConversionData.h"

#include "core/rendering/RenderView.h"
#include "core/rendering/style/RenderStyle.h"

namespace WebCore {

CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, float zoom, bool computingFontSize)
    : m_style(style)
    , m_rootStyle(rootStyle)
    , m_viewportWidth(renderView ? renderView->layoutViewportWidth() : 0)
    , m_viewportHeight(renderView ? renderView->layoutViewportHeight() : 0)
    , m_zoom(zoom)
    , m_useEffectiveZoom(false)
    , m_computingFontSize(computingFontSize)
{
    ASSERT(zoom > 0);
}

CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, bool computingFontSize)
    : m_style(style)
    , m_rootStyle(rootStyle)
    , m_viewportWidth(renderView ? renderView->layoutViewportWidth() : 0)
    , m_viewportHeight(renderView ? renderView->layoutViewportHeight() : 0)
    , m_useEffectiveZoom(true)
    , m_computingFontSize(computingFontSize)
{
}

CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, float viewportWidth, float viewportHeight, float zoom, bool computingFontSize)
    : m_style(style)
    , m_rootStyle(rootStyle)
    , m_viewportWidth(viewportWidth)
    , m_viewportHeight(viewportHeight)
    , m_zoom(zoom)
    , m_useEffectiveZoom(false)
    , m_computingFontSize(computingFontSize)
{
    ASSERT(zoom > 0);
}

float CSSToLengthConversionData::zoom() const
{
    if (m_useEffectiveZoom)
        return m_style ? m_style->effectiveZoom() : 1;
    return m_zoom;
}

double CSSToLengthConversionData::viewportWidthPercent() const
{
    m_style->setHasViewportUnits();
    return m_viewportWidth / 100;
}
double CSSToLengthConversionData::viewportHeightPercent() const
{
    m_style->setHasViewportUnits();
    return m_viewportHeight / 100;
}
double CSSToLengthConversionData::viewportMinPercent() const
{
    m_style->setHasViewportUnits();
    return std::min(m_viewportWidth, m_viewportHeight) / 100;
}
double CSSToLengthConversionData::viewportMaxPercent() const
{
    m_style->setHasViewportUnits();
    return std::max(m_viewportWidth, m_viewportHeight) / 100;
}

} // namespace WebCore