TEST_F(PaintPropertyTreeBuilderTest, FixedPosition)
{
loadTestData("fixed-position.html");
FrameView* frameView = document().view();
// target1 is a fixed-position element inside an absolute-position scrolling element.
// It should be attached under the viewport to skip scrolling and offset of the parent.
Element* target1 = document().getElementById("target1");
ObjectPaintProperties* target1Properties = target1->layoutObject()->objectPaintProperties();
EXPECT_EQ(TransformationMatrix().translate(200, 150), target1Properties->paintOffsetTranslation()->matrix());
EXPECT_EQ(frameView->preTranslation(), target1Properties->paintOffsetTranslation()->parent());
EXPECT_EQ(target1Properties->paintOffsetTranslation(), target1Properties->overflowClip()->localTransformSpace());
EXPECT_EQ(FloatRoundedRect(0, 0, 100, 100), target1Properties->overflowClip()->clipRect());
// Likewise, it inherits clip from the viewport, skipping overflow clip of the scroller.
EXPECT_EQ(frameView->contentClip(), target1Properties->overflowClip()->parent());
// target2 is a fixed-position element inside a transformed scrolling element.
// It should be attached under the scrolled box of the transformed element.
Element* target2 = document().getElementById("target2");
ObjectPaintProperties* target2Properties = target2->layoutObject()->objectPaintProperties();
Element* scroller = document().getElementById("scroller");
ObjectPaintProperties* scrollerProperties = scroller->layoutObject()->objectPaintProperties();
EXPECT_EQ(TransformationMatrix().translate(200, 150), target2Properties->paintOffsetTranslation()->matrix());
EXPECT_EQ(scrollerProperties->scrollTranslation(), target2Properties->paintOffsetTranslation()->parent());
EXPECT_EQ(target2Properties->paintOffsetTranslation(), target2Properties->overflowClip()->localTransformSpace());
EXPECT_EQ(FloatRoundedRect(0, 0, 100, 100), target2Properties->overflowClip()->clipRect());
EXPECT_EQ(scrollerProperties->overflowClip(), target2Properties->overflowClip()->parent());
}
TEST_F(PaintPropertyTreeBuilderTest, FrameScrollingTraditional)
{
setBodyInnerHTML("<style> body { height: 10000px; } </style>");
document().domWindow()->scrollTo(0, 100);
FrameView* frameView = document().view();
frameView->updateAllLifecyclePhases();
EXPECT_EQ(TransformationMatrix(), frameView->preTranslation()->matrix());
EXPECT_EQ(nullptr, frameView->preTranslation()->parent());
EXPECT_EQ(TransformationMatrix().translate(0, -100), frameView->scrollTranslation()->matrix());
EXPECT_EQ(frameView->preTranslation(), frameView->scrollTranslation()->parent());
LayoutView* layoutView = document().layoutView();
ObjectPaintProperties* layoutViewProperties = layoutView->objectPaintProperties();
EXPECT_EQ(nullptr, layoutViewProperties);
}
const TransformPaintPropertyNode* framePreTranslation() {
FrameView* frameView = document().view();
if (RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
return frameView->layoutView()
->paintProperties()
->paintOffsetTranslation();
}
return frameView->preTranslation();
}
void updateFrameViewPreTranslation(
FrameView& frameView,
PassRefPtr<const TransformPaintPropertyNode> parent,
const TransformationMatrix& matrix,
const FloatPoint3D& origin) {
DCHECK(!RuntimeEnabledFeatures::rootLayerScrollingEnabled());
if (auto* existingPreTranslation = frameView.preTranslation()) {
existingPreTranslation->update(std::move(parent), matrix, origin);
} else {
frameView.setPreTranslation(
TransformPaintPropertyNode::create(std::move(parent), matrix, origin));
}
}
void PaintPropertyTreeBuilder::buildTreeNodes(
FrameView& frameView,
PaintPropertyTreeBuilderContext& context) {
if (RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
LayoutView* layoutView = frameView.layoutView();
if (!layoutView)
return;
TransformationMatrix frameTranslate;
frameTranslate.translate(frameView.x() + layoutView->location().x() +
context.current.paintOffset.x(),
frameView.y() + layoutView->location().y() +
context.current.paintOffset.y());
context.current.transform =
layoutView->getMutableForPainting()
.ensurePaintProperties()
.updatePaintOffsetTranslation(context.current.transform,
frameTranslate, FloatPoint3D());
context.current.paintOffset = LayoutPoint();
context.current.renderingContextID = 0;
context.current.shouldFlattenInheritedTransform = true;
context.absolutePosition = context.current;
context.containerForAbsolutePosition =
nullptr; // This will get set in updateOutOfFlowContext().
context.fixedPosition = context.current;
return;
}
TransformationMatrix frameTranslate;
frameTranslate.translate(frameView.x() + context.current.paintOffset.x(),
frameView.y() + context.current.paintOffset.y());
context.current.transform = updateFrameViewPreTranslation(
frameView, context.current.transform, frameTranslate, FloatPoint3D());
FloatRoundedRect contentClip(
IntRect(IntPoint(), frameView.visibleContentSize()));
context.current.clip = updateFrameViewContentClip(
frameView, context.current.clip, frameView.preTranslation(), contentClip);
// Record the fixed properties before any scrolling occurs.
const auto* fixedTransformNode = context.current.transform;
auto* fixedScrollNode = context.current.scroll;
ScrollOffset scrollOffset = frameView.scrollOffset();
if (frameView.isScrollable() || !scrollOffset.isZero()) {
TransformationMatrix frameScroll;
frameScroll.translate(-scrollOffset.width(), -scrollOffset.height());
context.current.transform = updateFrameViewScrollTranslation(
frameView, frameView.preTranslation(), frameScroll, FloatPoint3D());
IntSize scrollClip = frameView.visibleContentSize();
IntSize scrollBounds = frameView.contentsSize();
bool userScrollableHorizontal =
frameView.userInputScrollable(HorizontalScrollbar);
bool userScrollableVertical =
frameView.userInputScrollable(VerticalScrollbar);
context.current.scroll = updateFrameViewScroll(
frameView, context.current.scroll, frameView.scrollTranslation(),
scrollClip, scrollBounds, userScrollableHorizontal,
userScrollableVertical);
} else {
// Ensure pre-existing properties are cleared when there is no scrolling.
frameView.setScrollTranslation(nullptr);
frameView.setScroll(nullptr);
}
// Initialize the context for current, absolute and fixed position cases.
// They are the same, except that scroll translation does not apply to
// fixed position descendants.
context.current.paintOffset = LayoutPoint();
context.current.renderingContextID = 0;
context.current.shouldFlattenInheritedTransform = true;
context.absolutePosition = context.current;
context.containerForAbsolutePosition = nullptr;
context.fixedPosition = context.current;
context.fixedPosition.transform = fixedTransformNode;
context.fixedPosition.scroll = fixedScrollNode;
std::unique_ptr<PropertyTreeState> contentsState(
new PropertyTreeState(context.current.transform, context.current.clip,
context.currentEffect, context.current.scroll));
frameView.setTotalPropertyTreeStateForContents(std::move(contentsState));
}
void PaintPropertyTreeBuilder::updateFramePropertiesAndContext(
FrameView& frameView,
PaintPropertyTreeBuilderContext& context) {
if (RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
// With root layer scrolling, the LayoutView (a LayoutObject) properties are
// updated like other objects (see updatePropertiesAndContextForSelf and
// updatePropertiesAndContextForChildren) instead of needing LayoutView-
// specific property updates here.
context.current.paintOffset.moveBy(frameView.location());
context.current.renderingContextID = 0;
context.current.shouldFlattenInheritedTransform = true;
context.absolutePosition = context.current;
context.containerForAbsolutePosition = nullptr;
context.fixedPosition = context.current;
return;
}
TransformationMatrix frameTranslate;
frameTranslate.translate(frameView.x() + context.current.paintOffset.x(),
frameView.y() + context.current.paintOffset.y());
updateFrameViewPreTranslation(frameView, context.current.transform,
frameTranslate, FloatPoint3D());
FloatRoundedRect contentClip(
IntRect(IntPoint(), frameView.visibleContentSize()));
updateFrameViewContentClip(frameView, context.current.clip,
frameView.preTranslation(), contentClip);
ScrollOffset scrollOffset = frameView.scrollOffset();
if (frameView.isScrollable() || !scrollOffset.isZero()) {
TransformationMatrix frameScroll;
frameScroll.translate(-scrollOffset.width(), -scrollOffset.height());
updateFrameViewScrollTranslation(frameView, frameView.preTranslation(),
frameScroll, FloatPoint3D());
IntSize scrollClip = frameView.visibleContentSize();
IntSize scrollBounds = frameView.contentsSize();
bool userScrollableHorizontal =
frameView.userInputScrollable(HorizontalScrollbar);
bool userScrollableVertical =
frameView.userInputScrollable(VerticalScrollbar);
updateFrameViewScroll(frameView, context.current.scroll,
frameView.scrollTranslation(), scrollClip,
scrollBounds, userScrollableHorizontal,
userScrollableVertical);
} else {
// Ensure pre-existing properties are cleared when there is no scrolling.
frameView.setScrollTranslation(nullptr);
frameView.setScroll(nullptr);
}
// Initialize the context for current, absolute and fixed position cases.
// They are the same, except that scroll translation does not apply to
// fixed position descendants.
const auto* fixedTransformNode = frameView.preTranslation()
? frameView.preTranslation()
: context.current.transform;
auto* fixedScrollNode = context.current.scroll;
DCHECK(frameView.preTranslation());
context.current.transform = frameView.preTranslation();
DCHECK(frameView.contentClip());
context.current.clip = frameView.contentClip();
if (const auto* scrollTranslation = frameView.scrollTranslation())
context.current.transform = scrollTranslation;
if (auto* scroll = frameView.scroll())
context.current.scroll = scroll;
context.current.paintOffset = LayoutPoint();
context.current.renderingContextID = 0;
context.current.shouldFlattenInheritedTransform = true;
context.absolutePosition = context.current;
context.containerForAbsolutePosition = nullptr;
context.fixedPosition = context.current;
context.fixedPosition.transform = fixedTransformNode;
context.fixedPosition.scroll = fixedScrollNode;
std::unique_ptr<PropertyTreeState> contentsState(
new PropertyTreeState(context.current.transform, context.current.clip,
context.currentEffect, context.current.scroll));
frameView.setTotalPropertyTreeStateForContents(std::move(contentsState));
}
