double ViewportConfiguration::minimumScale() const
{
// If we scale to fit, then this is our minimum scale as well.
if (!m_configuration.initialScaleIsSet || shouldIgnoreScalingConstraints())
return initialScale();
// If not, we still need to sanity check our value.
double minimumScale = m_configuration.minimumScale;
if (m_forceAlwaysUserScalable)
minimumScale = std::min(minimumScale, forceAlwaysUserScalableMinimumScale);
const FloatSize& minimumLayoutSize = m_minimumLayoutSize;
double contentWidth = m_contentSize.width();
if (contentWidth > 0 && contentWidth * minimumScale < minimumLayoutSize.width() && !shouldIgnoreVerticalScalingConstraints())
minimumScale = minimumLayoutSize.width() / contentWidth;
double contentHeight = m_contentSize.height();
if (contentHeight > 0 && contentHeight * minimumScale < minimumLayoutSize.height() && !shouldIgnoreHorizontalScalingConstraints())
minimumScale = minimumLayoutSize.height() / contentHeight;
minimumScale = std::min(std::max(minimumScale, m_configuration.minimumScale), m_configuration.maximumScale);
return minimumScale;
}
bool ViewportConfiguration::allowsUserScaling() const
{
return m_forceAlwaysUserScalable || shouldIgnoreScalingConstraints() || m_configuration.allowsUserScaling;
}
double ViewportConfiguration::initialScale() const
{
return initialScaleFromSize(m_contentSize.width() > 0 ? m_contentSize.width() : layoutWidth(), m_contentSize.height() > 0 ? m_contentSize.height() : layoutHeight(), shouldIgnoreScalingConstraints());
}
