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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/layout/LayoutBlock.h"
#include "core/layout/LayoutInline.h"
#include "core/layout/LayoutTestHelper.h"
#include "core/paint/PaintLayer.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
class PaintContainmentTest : public RenderingTest {
private:
void SetUp() override {
RenderingTest::SetUp();
enableCompositing();
}
};
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());
}
TEST_F(PaintContainmentTest, BlockPaintContainment) {
setBodyInnerHTML("<div id='div' style='contain: paint'></div>");
Element* div = document().getElementById(AtomicString("div"));
ASSERT(div);
LayoutObject* obj = div->layoutObject();
ASSERT(obj && obj->isLayoutBlock());
LayoutBlock& block = toLayoutBlock(*obj);
EXPECT_TRUE(block.createsNewFormattingContext());
EXPECT_FALSE(block.canBeScrolledAndHasScrollableArea());
checkIsClippingStackingContextAndContainer(block);
}
TEST_F(PaintContainmentTest, InlinePaintContainment) {
setBodyInnerHTML(
"<div><span id='test' style='contain: paint'>Foo</span></div>");
Element* span = document().getElementById(AtomicString("test"));
ASSERT(span);
// The inline should have been coerced into a block in StyleAdjuster.
LayoutObject* obj = span->layoutObject();
ASSERT(obj && obj->isLayoutBlock());
LayoutBlock& layoutBlock = toLayoutBlock(*obj);
checkIsClippingStackingContextAndContainer(layoutBlock);
}
TEST_F(PaintContainmentTest, SvgWithContainmentShouldNotCrash) {
// SVG doesn't currently support PaintLayers and should not crash with
// layer-related properties.
setBodyInnerHTML("<svg><text y='20' style='contain: paint'>Foo</text></svg>");
setBodyInnerHTML(
"<svg><foreignObject style='contain: paint'>Foo</foreignObject></svg>");
setBodyInnerHTML(
"<svg><foreignObject><span style='contain: "
"paint'>Foo</span></foreignObject></svg>");
}
} // namespace blink
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