TEST_F(ScrollingCoordinatorChromiumTest, fastScrollingForFixedPosition)
{
registerMockedHttpURLLoad("fixed-position.html");
navigateTo(m_baseURL + "fixed-position.html");
Page* page = m_webViewImpl->mainFrameImpl()->frame()->page();
ASSERT_TRUE(page->scrollingCoordinator()->supportsFixedPositionLayers());
// Fixed position should not fall back to main thread scrolling.
WebLayer* rootScrollLayer = getRootScrollLayer();
ASSERT_FALSE(rootScrollLayer->shouldScrollOnMainThread());
// Verify the properties of the fixed position element starting from the RenderObject all the
// way to the WebLayer.
Element* fixedElement = m_webViewImpl->mainFrameImpl()->frame()->document()->getElementById("fixed");
ASSERT(fixedElement);
RenderObject* renderer = fixedElement->renderer();
ASSERT_TRUE(renderer->isBoxModelObject());
ASSERT_TRUE(renderer->hasLayer());
RenderLayer* layer = toRenderBoxModelObject(renderer)->layer();
ASSERT_TRUE(layer->isComposited());
RenderLayerBacking* layerBacking = layer->backing();
WebLayer* webLayer = static_cast<WebLayer*>(layerBacking->graphicsLayer()->platformLayer());
ASSERT_TRUE(webLayer->fixedToContainerLayer());
}
TEST_F(ScrollingCoordinatorTest, FixedPositionLosingBackingShouldTriggerMainThreadScroll)
{
webViewImpl()->settings()->setPreferCompositingToLCDTextEnabled(false);
registerMockedHttpURLLoad("fixed-position-losing-backing.html");
navigateTo(m_baseURL + "fixed-position-losing-backing.html");
forceFullCompositingUpdate();
WebLayer* scrollLayer = frame()->page()->deprecatedLocalMainFrame()->view()->layerForScrolling()->platformLayer();
Document* document = frame()->document();
Element* fixedPos = document->getElementById("fixed");
EXPECT_TRUE(static_cast<LayoutBoxModelObject*>(fixedPos->layoutObject())->layer()->hasCompositedLayerMapping());
EXPECT_FALSE(scrollLayer->shouldScrollOnMainThread());
fixedPos->setInlineStyleProperty(CSSPropertyTransform, CSSValueNone);
forceFullCompositingUpdate();
EXPECT_FALSE(static_cast<LayoutBoxModelObject*>(fixedPos->layoutObject())->layer()->hasCompositedLayerMapping());
EXPECT_TRUE(scrollLayer->shouldScrollOnMainThread());
}
TEST_F(ScrollingCoordinatorChromiumTest, fastScrollingByDefault)
{
navigateTo("about:blank");
// Make sure the scrolling coordinator is active.
FrameView* frameView = m_webViewImpl->mainFrameImpl()->frameView();
Page* page = m_webViewImpl->mainFrameImpl()->frame()->page();
ASSERT_TRUE(page->scrollingCoordinator());
ASSERT_TRUE(page->scrollingCoordinator()->coordinatesScrollingForFrameView(frameView));
// Fast scrolling should be enabled by default.
WebLayer* rootScrollLayer = getRootScrollLayer();
ASSERT_TRUE(rootScrollLayer->scrollable());
ASSERT_FALSE(rootScrollLayer->shouldScrollOnMainThread());
ASSERT_FALSE(rootScrollLayer->haveWheelEventHandlers());
}
TEST_F(ScrollingCoordinatorTest, fastScrollingCanBeDisabledWithSetting)
{
navigateTo("about:blank");
webViewImpl()->settings()->setThreadedScrollingEnabled(false);
forceFullCompositingUpdate();
// Make sure the scrolling coordinator is active.
FrameView* frameView = frame()->view();
Page* page = frame()->page();
ASSERT_TRUE(page->scrollingCoordinator());
ASSERT_TRUE(page->scrollingCoordinator()->coordinatesScrollingForFrameView(frameView));
// Main scrolling should be enabled with the setting override.
WebLayer* rootScrollLayer = getRootScrollLayer();
ASSERT_TRUE(rootScrollLayer->scrollable());
ASSERT_TRUE(rootScrollLayer->shouldScrollOnMainThread());
}
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, fastScrollingForFixedPosition)
{
registerMockedHttpURLLoad("fixed-position.html");
navigateTo(m_baseURL + "fixed-position.html");
forceFullCompositingUpdate();
// Fixed position should not fall back to main thread scrolling.
WebLayer* rootScrollLayer = getRootScrollLayer();
ASSERT_FALSE(rootScrollLayer->shouldScrollOnMainThread());
Document* document = frame()->document();
{
Element* element = document->getElementById("div-tl");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(!constraint.isFixedToRightEdge && !constraint.isFixedToBottomEdge);
}
{
Element* element = document->getElementById("div-tr");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(constraint.isFixedToRightEdge && !constraint.isFixedToBottomEdge);
}
{
Element* element = document->getElementById("div-bl");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(!constraint.isFixedToRightEdge && constraint.isFixedToBottomEdge);
}
{
Element* element = document->getElementById("div-br");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(constraint.isFixedToRightEdge && constraint.isFixedToBottomEdge);
}
{
Element* element = document->getElementById("span-tl");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(!constraint.isFixedToRightEdge && !constraint.isFixedToBottomEdge);
}
{
Element* element = document->getElementById("span-tr");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(constraint.isFixedToRightEdge && !constraint.isFixedToBottomEdge);
}
{
Element* element = document->getElementById("span-bl");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(!constraint.isFixedToRightEdge && constraint.isFixedToBottomEdge);
}
{
Element* element = document->getElementById("span-br");
ASSERT_TRUE(element);
WebLayer* layer = webLayerFromElement(element);
ASSERT_TRUE(layer);
WebLayerPositionConstraint constraint = layer->positionConstraint();
ASSERT_TRUE(constraint.isFixedPosition);
ASSERT_TRUE(constraint.isFixedToRightEdge && constraint.isFixedToBottomEdge);
}
}
