static void checkIsClippingStackingContextAndContainer(LayoutBoxModelObject& obj) { EXPECT_TRUE(obj.canContainFixedPositionObjects()); EXPECT_TRUE(obj.hasClipRelatedProperty()); EXPECT_TRUE(obj.style()->containsPaint()); // TODO(leviw): Ideally, we wouldn't require a paint layer to handle the clipping // and stacking performed by paint containment. ASSERT(obj.layer()); PaintLayer* layer = obj.layer(); EXPECT_TRUE(layer->stackingNode() && layer->stackingNode()->isStackingContext()); }
static void applyClipRects(const ClipRectsContext& context, const LayoutBoxModelObject& layoutObject, LayoutPoint offset, ClipRects& clipRects) { DCHECK(layoutObject.hasClipRelatedProperty() || (layoutObject.isSVGRoot() && toLayoutSVGRoot(&layoutObject)->shouldApplyViewportClip())); LayoutView* view = layoutObject.view(); DCHECK(view); if (clipRects.fixed() && context.rootLayer->layoutObject() == view) offset -= LayoutSize(view->frameView()->scrollOffset()); if (layoutObject.hasOverflowClip() || (layoutObject.isSVGRoot() && toLayoutSVGRoot(&layoutObject)->shouldApplyViewportClip()) || (layoutObject.styleRef().containsPaint() && layoutObject.isBox())) { ClipRect newOverflowClip = toLayoutBox(layoutObject) .overflowClipRect(offset, context.overlayScrollbarClipBehavior); newOverflowClip.setHasRadius(layoutObject.styleRef().hasBorderRadius()); clipRects.setOverflowClipRect( intersection(newOverflowClip, clipRects.overflowClipRect())); if (layoutObject.isPositioned()) clipRects.setPosClipRect( intersection(newOverflowClip, clipRects.posClipRect())); if (layoutObject.isLayoutView()) clipRects.setFixedClipRect( intersection(newOverflowClip, clipRects.fixedClipRect())); if (layoutObject.styleRef().containsPaint()) { clipRects.setPosClipRect( intersection(newOverflowClip, clipRects.posClipRect())); clipRects.setFixedClipRect( intersection(newOverflowClip, clipRects.fixedClipRect())); } } if (layoutObject.hasClip()) { LayoutRect newClip = toLayoutBox(layoutObject).clipRect(offset); clipRects.setPosClipRect( intersection(newClip, clipRects.posClipRect()).setIsClippedByClipCss()); clipRects.setOverflowClipRect( intersection(newClip, clipRects.overflowClipRect()) .setIsClippedByClipCss()); clipRects.setFixedClipRect(intersection(newClip, clipRects.fixedClipRect()) .setIsClippedByClipCss()); } }