void RotationViewportAnchor::setAnchor() {
RootFrameViewport* rootFrameViewport =
m_rootFrameView->getRootFrameViewport();
DCHECK(rootFrameViewport);
m_oldPageScaleFactor = m_visualViewport->scale();
m_oldMinimumPageScaleFactor =
m_pageScaleConstraintsSet.finalConstraints().minimumScale;
// Save the absolute location in case we won't find the anchor node, we'll
// fall back to that.
m_visualViewportInDocument =
FloatPoint(rootFrameViewport->visibleContentRect().location());
m_anchorNode.clear();
m_anchorNodeBounds = LayoutRect();
m_anchorInNodeCoords = FloatSize();
m_normalizedVisualViewportOffset = FloatSize();
IntRect innerViewRect = rootFrameViewport->visibleContentRect();
// Preserve origins at the absolute screen origin.
if (innerViewRect.location() == IntPoint::zero() || innerViewRect.isEmpty())
return;
IntRect outerViewRect =
layoutViewport().visibleContentRect(IncludeScrollbars);
// Normalize by the size of the outer rect
DCHECK(!outerViewRect.isEmpty());
m_normalizedVisualViewportOffset = m_visualViewport->getScrollOffset();
m_normalizedVisualViewportOffset.scale(1.0 / outerViewRect.width(),
1.0 / outerViewRect.height());
// Note, we specifically use the unscaled visual viewport size here as the
// conversion into content-space below will apply the scale.
FloatPoint anchorOffset(m_visualViewport->size());
anchorOffset.scale(m_anchorInInnerViewCoords.width(),
m_anchorInInnerViewCoords.height());
// Note, we specifically convert to the rootFrameView contents here, rather
// than the layout viewport. That's because hit testing works from the
// FrameView's content coordinates even if it's not the layout viewport.
const FloatPoint anchorPointInContents = m_rootFrameView->frameToContents(
m_visualViewport->viewportToRootFrame(anchorOffset));
Node* node = findNonEmptyAnchorNode(flooredIntPoint(anchorPointInContents),
innerViewRect,
m_rootFrameView->frame().eventHandler());
if (!node)
return;
m_anchorNode = node;
m_anchorNodeBounds = node->boundingBox();
m_anchorInNodeCoords =
anchorPointInContents - FloatPoint(m_anchorNodeBounds.location());
m_anchorInNodeCoords.scale(1.f / m_anchorNodeBounds.width(),
1.f / m_anchorNodeBounds.height());
}
void RotationViewportAnchor::setAnchor() {
RootFrameViewport* rootFrameViewport =
m_rootFrameView->getRootFrameViewport();
DCHECK(rootFrameViewport);
IntRect outerViewRect =
layoutViewport().visibleContentRect(IncludeScrollbars);
IntRect innerViewRect = rootFrameViewport->visibleContentRect();
m_oldPageScaleFactor = m_visualViewport->scale();
m_oldMinimumPageScaleFactor =
m_pageScaleConstraintsSet.finalConstraints().minimumScale;
// Save the absolute location in case we won't find the anchor node, we'll
// fall back to that.
m_visualViewportInDocument =
FloatPoint(rootFrameViewport->visibleContentRect().location());
m_anchorNode.clear();
m_anchorNodeBounds = LayoutRect();
m_anchorInNodeCoords = FloatSize();
m_normalizedVisualViewportOffset = FloatSize();
if (innerViewRect.isEmpty())
return;
// Preserve origins at the absolute screen origin
if (innerViewRect.location() == IntPoint::zero())
return;
// Inner rectangle should be within the outer one.
DCHECK(outerViewRect.contains(innerViewRect));
// Outer rectangle is used as a scale, we need positive width and height.
DCHECK(!outerViewRect.isEmpty());
m_normalizedVisualViewportOffset =
FloatSize(innerViewRect.location() - outerViewRect.location());
// Normalize by the size of the outer rect
m_normalizedVisualViewportOffset.scale(1.0 / outerViewRect.width(),
1.0 / outerViewRect.height());
FloatPoint anchorOffset(innerViewRect.size());
anchorOffset.scale(m_anchorInInnerViewCoords.width(),
m_anchorInInnerViewCoords.height());
const FloatPoint anchorPointInContents = m_rootFrameView->rootFrameToContents(
m_visualViewport->viewportToRootFrame(anchorOffset));
Node* node = findNonEmptyAnchorNode(flooredIntPoint(anchorPointInContents),
innerViewRect,
m_rootFrameView->frame().eventHandler());
if (!node)
return;
m_anchorNode = node;
m_anchorNodeBounds = node->boundingBox();
m_anchorInNodeCoords =
anchorPointInContents - FloatPoint(m_anchorNodeBounds.location());
m_anchorInNodeCoords.scale(1.f / m_anchorNodeBounds.width(),
1.f / m_anchorNodeBounds.height());
}
