void ScrollableAreaPainter::paintScrollCorner(
GraphicsContext& context,
const IntPoint& paintOffset,
const CullRect& adjustedCullRect) {
IntRect absRect = getScrollableArea().scrollCornerRect();
if (absRect.isEmpty())
return;
absRect.moveBy(paintOffset);
if (getScrollableArea().scrollCorner()) {
if (!adjustedCullRect.intersectsCullRect(absRect))
return;
ScrollbarPainter::paintIntoRect(*getScrollableArea().scrollCorner(),
context, paintOffset, LayoutRect(absRect));
return;
}
// We don't want to paint white if we have overlay scrollbars, since we need
// to see what is behind it.
if (getScrollableArea().hasOverlayScrollbars())
return;
if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(
context, getScrollableArea().box(), DisplayItem::kScrollbarCorner))
return;
LayoutObjectDrawingRecorder recorder(context, getScrollableArea().box(),
DisplayItem::kScrollbarCorner, absRect);
context.fillRect(absRect, Color::white);
}
void Scrollbar::paint(GraphicsContext* context, const CullRect& cullRect) const
{
if (!cullRect.intersectsCullRect(frameRect()))
return;
if (!theme()->paint(this, context, cullRect))
Widget::paint(context, cullRect);
}
bool LineBoxList::rangeIntersectsRect(LineLayoutBoxModel layoutObject, LayoutUnit logicalTop, LayoutUnit logicalBottom, const CullRect& cullRect, const LayoutPoint& offset) const
{
LineLayoutBox block;
if (layoutObject.isBox())
block = LineLayoutBox(layoutObject);
else
block = layoutObject.containingBlock();
LayoutUnit physicalStart = block.flipForWritingMode(logicalTop);
LayoutUnit physicalEnd = block.flipForWritingMode(logicalBottom);
LayoutUnit physicalExtent = absoluteValue(physicalEnd - physicalStart);
physicalStart = std::min(physicalStart, physicalEnd);
if (layoutObject.style()->isHorizontalWritingMode()) {
physicalStart += offset.y();
return cullRect.intersectsVerticalRange(physicalStart, physicalStart + physicalExtent);
} else {
physicalStart += offset.x();
return cullRect.intersectsHorizontalRange(physicalStart, physicalStart + physicalExtent);
}
}
bool ScrollableAreaPainter::overflowControlsIntersectRect(
const CullRect& cullRect) const {
const IntRect borderBox =
getScrollableArea().box().pixelSnappedBorderBoxRect();
if (cullRect.intersectsCullRect(
getScrollableArea().rectForHorizontalScrollbar(borderBox)))
return true;
if (cullRect.intersectsCullRect(
getScrollableArea().rectForVerticalScrollbar(borderBox)))
return true;
if (cullRect.intersectsCullRect(getScrollableArea().scrollCornerRect()))
return true;
if (cullRect.intersectsCullRect(
getScrollableArea().resizerCornerRect(borderBox, ResizerForPointer)))
return true;
return false;
}
void ScrollableAreaPainter::paintResizer(GraphicsContext& context,
const IntPoint& paintOffset,
const CullRect& cullRect) {
if (getScrollableArea().box().style()->resize() == RESIZE_NONE)
return;
IntRect absRect = getScrollableArea().resizerCornerRect(
getScrollableArea().box().pixelSnappedBorderBoxRect(), ResizerForPointer);
if (absRect.isEmpty())
return;
absRect.moveBy(paintOffset);
if (getScrollableArea().resizer()) {
if (!cullRect.intersectsCullRect(absRect))
return;
ScrollbarPainter::paintIntoRect(*getScrollableArea().resizer(), context,
paintOffset, LayoutRect(absRect));
return;
}
if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(
context, getScrollableArea().box(), DisplayItem::kResizer))
return;
LayoutObjectDrawingRecorder recorder(context, getScrollableArea().box(),
DisplayItem::kResizer, absRect);
drawPlatformResizerImage(context, absRect);
// Draw a frame around the resizer (1px grey line) if there are any scrollbars
// present. Clipping will exclude the right and bottom edges of this frame.
if (!getScrollableArea().hasOverlayScrollbars() &&
getScrollableArea().hasScrollbar()) {
GraphicsContextStateSaver stateSaver(context);
context.clip(absRect);
IntRect largerCorner = absRect;
largerCorner.setSize(
IntSize(largerCorner.width() + 1, largerCorner.height() + 1));
context.setStrokeColor(Color(217, 217, 217));
context.setStrokeThickness(1.0f);
context.setFillColor(Color::transparent);
context.drawRect(largerCorner);
}
}
