PageScaleConstraintsSet::PageScaleConstraintsSet()
: m_defaultConstraints(-1, 1, 1)
, m_finalConstraints(computeConstraintsStack())
, m_lastContentsWidth(0)
, m_needsReset(false)
, m_constraintsDirty(false)
{
}
void PageScaleConstraintsSet::didChangeContentsSize(IntSize contentsSize, float pageScaleFactor)
{
// If a large fixed-width element expanded the size of the document late in
// loading and our initial scale is not set (or set to be less than the last
// minimum scale), reset the page scale factor to the new initial scale.
if (contentsSize.width() > m_lastContentsWidth
&& pageScaleFactor == finalConstraints().minimumScale
&& computeConstraintsStack().initialScale < finalConstraints().minimumScale)
setNeedsReset(true);
m_constraintsDirty = true;
m_lastContentsWidth = contentsSize.width();
}
void PageScaleConstraintsSet::computeFinalConstraints()
{
m_finalConstraints = computeConstraintsStack();
m_constraintsDirty = false;
}
IntSize PageScaleConstraintsSet::layoutSize() const
{
return flooredIntSize(computeConstraintsStack().layoutSize);
}