TEST_F(ScrollingCoordinatorTest, fastFractionalScrollingDiv)
{
registerMockedHttpURLLoad("fractional-scroll-div.html");
navigateTo(m_baseURL + "fractional-scroll-div.html");
forceFullCompositingUpdate();
Document* document = frame()->document();
Element* scrollableElement = document->getElementById("scroller");
ASSERT(scrollableElement);
scrollableElement->setScrollTop(1.0);
scrollableElement->setScrollLeft(1.0);
forceFullCompositingUpdate();
// Make sure the fractional scroll offset change 1.0 -> 1.2 gets propagated
// to compositor.
scrollableElement->setScrollTop(1.2);
scrollableElement->setScrollLeft(1.2);
forceFullCompositingUpdate();
LayoutObject* layoutObject = scrollableElement->layoutObject();
ASSERT_TRUE(layoutObject->isBox());
LayoutBox* box = toLayoutBox(layoutObject);
ASSERT_TRUE(box->usesCompositedScrolling());
CompositedLayerMapping* compositedLayerMapping = box->layer()->compositedLayerMapping();
ASSERT_TRUE(compositedLayerMapping->hasScrollingLayer());
ASSERT(compositedLayerMapping->scrollingContentsLayer());
WebLayer* webScrollLayer = compositedLayerMapping->scrollingContentsLayer()->platformLayer();
ASSERT_TRUE(webScrollLayer);
ASSERT_NEAR(1.2, webScrollLayer->scrollPositionDouble().x, 0.01);
ASSERT_NEAR(1.2, webScrollLayer->scrollPositionDouble().y, 0.01);
}
TEST_F(ScrollingCoordinatorTest, fractionalScrollingNonLayerFixedPosition)
{
registerMockedHttpURLLoad("fractional-scroll-fixed-position.html");
navigateTo(m_baseURL + "fractional-scroll-fixed-position.html");
// Prevent fixed-position element from getting its own layer.
webViewImpl()->settings()->setPreferCompositingToLCDTextEnabled(false);
forceFullCompositingUpdate();
FrameView* frameView = frame()->view();
frameView->scrollTo(DoublePoint(1.5, 1.5));
WebLayer* rootScrollLayer = getRootScrollLayer();
// Scroll on main if there is non-composited fixed position element.
// And the containing scroll layer should not get fractional scroll offset.
ASSERT_TRUE(rootScrollLayer->shouldScrollOnMainThread());
ASSERT_EQ(1.0, rootScrollLayer->scrollPositionDouble().x);
ASSERT_EQ(1.0, rootScrollLayer->scrollPositionDouble().y);
ASSERT_EQ(0.0, rootScrollLayer->position().x);
ASSERT_EQ(0.0, rootScrollLayer->position().y);
}
TEST_F(ScrollingCoordinatorTest, rtlIframe)
{
registerMockedHttpURLLoad("rtl-iframe.html");
registerMockedHttpURLLoad("rtl-iframe-inner.html");
navigateTo(m_baseURL + "rtl-iframe.html");
forceFullCompositingUpdate();
// Verify the properties of the accelerated scrolling element starting from the LayoutObject
// all the way to the WebLayer.
Element* scrollableFrame = frame()->document()->getElementById("scrollable");
ASSERT_TRUE(scrollableFrame);
LayoutObject* layoutObject = scrollableFrame->layoutObject();
ASSERT_TRUE(layoutObject);
ASSERT_TRUE(layoutObject->isLayoutPart());
LayoutPart* layoutPart = toLayoutPart(layoutObject);
ASSERT_TRUE(layoutPart);
ASSERT_TRUE(layoutPart->widget());
ASSERT_TRUE(layoutPart->widget()->isFrameView());
FrameView* innerFrameView = toFrameView(layoutPart->widget());
LayoutView* innerLayoutView = innerFrameView->layoutView();
ASSERT_TRUE(innerLayoutView);
PaintLayerCompositor* innerCompositor = innerLayoutView->compositor();
ASSERT_TRUE(innerCompositor->inCompositingMode());
ASSERT_TRUE(innerCompositor->scrollLayer());
GraphicsLayer* scrollLayer = innerCompositor->scrollLayer();
ASSERT_EQ(innerFrameView, scrollLayer->scrollableArea());
WebLayer* webScrollLayer = scrollLayer->platformLayer();
ASSERT_TRUE(webScrollLayer->scrollable());
int expectedScrollPosition = 958 + (innerFrameView->verticalScrollbar()->isOverlayScrollbar() ? 0 : 15);
ASSERT_EQ(expectedScrollPosition, webScrollLayer->scrollPositionDouble().x);
}
