bool
AccessibleCaret::Intersects(const AccessibleCaret& aCaret) const
{
MOZ_ASSERT(mPresShell == aCaret.mPresShell);
if (!IsVisuallyVisible() || !aCaret.IsVisuallyVisible()) {
return false;
}
nsRect rect = nsLayoutUtils::GetRectRelativeToFrame(CaretElement(), RootFrame());
nsRect rhsRect = nsLayoutUtils::GetRectRelativeToFrame(aCaret.CaretElement(), RootFrame());
return rect.Intersects(rhsRect);
}
bool
AccessibleCaret::Contains(const nsPoint& aPoint) const
{
if (!IsVisuallyVisible()) {
return false;
}
nsRect rect =
nsLayoutUtils::GetRectRelativeToFrame(CaretImageElement(), RootFrame());
return rect.Contains(aPoint);
}
AccessibleCaret::PositionChangedResult
AccessibleCaret::SetPosition(nsIFrame* aFrame, int32_t aOffset)
{
if (!CustomContentContainerFrame()) {
return PositionChangedResult::NotChanged;
}
nsRect imaginaryCaretRectInFrame =
nsCaret::GetGeometryForFrame(aFrame, aOffset, nullptr);
imaginaryCaretRectInFrame =
nsLayoutUtils::ClampRectToScrollFrames(aFrame, imaginaryCaretRectInFrame);
if (imaginaryCaretRectInFrame.IsEmpty()) {
// Don't bother to set the caret position since it's invisible.
mImaginaryCaretRect = nsRect();
mZoomLevel = 0.0f;
return PositionChangedResult::Invisible;
}
nsRect imaginaryCaretRect = imaginaryCaretRectInFrame;
nsLayoutUtils::TransformRect(aFrame, RootFrame(), imaginaryCaretRect);
float zoomLevel = GetZoomLevel();
if (imaginaryCaretRect.IsEqualEdges(mImaginaryCaretRect) &&
FuzzyEqualsMultiplicative(zoomLevel, mZoomLevel)) {
return PositionChangedResult::NotChanged;
}
mImaginaryCaretRect = imaginaryCaretRect;
mZoomLevel = zoomLevel;
// SetCaretElementStyle() and SetSelectionBarElementStyle() require the
// input rect relative to container frame.
nsRect imaginaryCaretRectInContainerFrame = imaginaryCaretRectInFrame;
nsLayoutUtils::TransformRect(aFrame, CustomContentContainerFrame(),
imaginaryCaretRectInContainerFrame);
SetCaretElementStyle(imaginaryCaretRectInContainerFrame, mZoomLevel);
SetSelectionBarElementStyle(imaginaryCaretRectInContainerFrame, mZoomLevel);
return PositionChangedResult::Changed;
}
