bool VisualViewport::didSetScaleOrLocation(float scale,
const FloatPoint& location) {
if (!mainFrame())
return false;
bool valuesChanged = false;
if (scale != m_scale) {
m_scale = scale;
valuesChanged = true;
frameHost().chromeClient().pageScaleFactorChanged();
enqueueResizeEvent();
}
ScrollOffset clampedOffset = clampScrollOffset(toScrollOffset(location));
if (clampedOffset != m_offset) {
m_offset = clampedOffset;
scrollAnimator().setCurrentOffset(m_offset);
// SVG runs with accelerated compositing disabled so no
// ScrollingCoordinator.
if (ScrollingCoordinator* coordinator =
frameHost().page().scrollingCoordinator())
coordinator->scrollableAreaScrollLayerDidChange(this);
if (!frameHost().settings().inertVisualViewport()) {
if (Document* document = mainFrame()->document())
document->enqueueScrollEventForNode(document);
}
enqueueScrollEvent();
mainFrame()->view()->didChangeScrollOffset();
valuesChanged = true;
}
if (!valuesChanged)
return false;
InspectorInstrumentation::didUpdateLayout(mainFrame());
mainFrame()->loader().saveScrollState();
clampToBoundaries();
return true;
}
void RotationViewportAnchor::restoreToAnchor() {
float newPageScaleFactor =
m_oldPageScaleFactor / m_oldMinimumPageScaleFactor *
m_pageScaleConstraintsSet.finalConstraints().minimumScale;
newPageScaleFactor =
m_pageScaleConstraintsSet.finalConstraints().clampToConstraints(
newPageScaleFactor);
FloatSize visualViewportSize(m_visualViewport->size());
visualViewportSize.scale(1 / newPageScaleFactor);
IntPoint mainFrameOrigin;
FloatPoint visualViewportOrigin;
computeOrigins(visualViewportSize, mainFrameOrigin, visualViewportOrigin);
layoutViewport().setScrollOffset(toScrollOffset(mainFrameOrigin),
ProgrammaticScroll);
// Set scale before location, since location can be clamped on setting scale.
m_visualViewport->setScale(newPageScaleFactor);
m_visualViewport->setLocation(visualViewportOrigin);
}
void WebHistoryItem::setVisualViewportScrollOffset(
const WebFloatPoint& scrollOffset) {
m_private->setVisualViewportScrollOffset(toScrollOffset(scrollOffset));
}
