DoublePoint VisualViewport::maximumScrollPositionDouble() const
{
if (!mainFrame())
return IntPoint();
// FIXME: We probably shouldn't be storing the bounds in a float. crbug.com/422331.
FloatSize frameViewSize(contentsSize());
if (m_topControlsAdjustment) {
float minScale = frameHost().pageScaleConstraintsSet().finalConstraints().minimumScale;
frameViewSize.expand(0, m_topControlsAdjustment / minScale);
}
frameViewSize.scale(m_scale);
frameViewSize = flooredIntSize(frameViewSize);
FloatSize viewportSize(m_size);
viewportSize.expand(0, m_topControlsAdjustment);
FloatSize maxPosition = frameViewSize - viewportSize;
maxPosition.scale(1 / m_scale);
return DoublePoint(maxPosition);
}
ScrollOffset VisualViewport::maximumScrollOffset() const {
if (!mainFrame())
return ScrollOffset();
// TODO(bokan): We probably shouldn't be storing the bounds in a float.
// crbug.com/470718.
FloatSize frameViewSize(contentsSize());
if (m_browserControlsAdjustment) {
float minScale =
frameHost().pageScaleConstraintsSet().finalConstraints().minimumScale;
frameViewSize.expand(0, m_browserControlsAdjustment / minScale);
}
frameViewSize.scale(m_scale);
frameViewSize = FloatSize(flooredIntSize(frameViewSize));
FloatSize viewportSize(m_size);
viewportSize.expand(0, ceilf(m_browserControlsAdjustment));
FloatSize maxPosition = frameViewSize - viewportSize;
maxPosition.scale(1 / m_scale);
return ScrollOffset(maxPosition);
}