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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 "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/core/layout/layout_block.h"
#include "third_party/blink/renderer/core/layout/layout_inline.h"
#include "third_party/blink/renderer/core/paint/paint_layer.h"
#include "third_party/blink/renderer/core/testing/core_unit_test_helper.h"
namespace blink {
class PaintContainmentTest : public RenderingTest {
private:
void SetUp() override {
EnableCompositing();
RenderingTest::SetUp();
}
};
static void CheckIsClippingStackingContextAndContainer(
LayoutBoxModelObject& obj) {
EXPECT_TRUE(obj.CanContainFixedPositionObjects());
EXPECT_TRUE(obj.HasClipRelatedProperty());
EXPECT_TRUE(obj.ShouldApplyPaintContainment());
// TODO(leviw): Ideally, we wouldn't require a paint layer to handle the
// clipping and stacking performed by paint containment.
DCHECK(obj.Layer());
PaintLayer* layer = obj.Layer();
EXPECT_TRUE(layer->GetLayoutObject().IsStackingContext());
}
TEST_F(PaintContainmentTest, BlockPaintContainment) {
SetBodyInnerHTML("<div id='div' style='contain: paint'></div>");
Element* div = GetDocument().getElementById(AtomicString("div"));
DCHECK(div);
LayoutObject* obj = div->GetLayoutObject();
DCHECK(obj);
DCHECK(obj->IsLayoutBlock());
auto& block = To<LayoutBlock>(*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 = GetDocument().getElementById(AtomicString("test"));
DCHECK(span);
// Paint containment shouldn't apply to non-atomic inlines.
LayoutObject* obj = span->GetLayoutObject();
DCHECK(obj);
EXPECT_FALSE(obj->IsLayoutBlock());
}
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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