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// Copyright 2018 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 "third_party/blink/renderer/core/paint/compositing/compositing_requirements_updater.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/core/paint/paint_layer.h"
#include "third_party/blink/renderer/core/paint/paint_layer_scrollable_area.h"
#include "third_party/blink/renderer/core/testing/core_unit_test_helper.h"
#include "third_party/blink/renderer/platform/graphics/graphics_layer.h"
namespace blink {
class CompositingRequirementsUpdaterTest : public RenderingTest {
public:
CompositingRequirementsUpdaterTest()
: RenderingTest(SingleChildLocalFrameClient::Create()) {}
void SetUp() final;
};
void CompositingRequirementsUpdaterTest::SetUp() {
RenderingTest::SetUp();
EnableCompositing();
}
TEST_F(CompositingRequirementsUpdaterTest,
NoOverlapReasonForNonSelfPaintingLayer) {
SetBodyInnerHTML(R"HTML(
<style>
#target {
overflow: auto;
width: 100px;
height: 100px;
margin-top: -50px;
}
</style>
<div style="position: relative; width: 500px; height: 300px;
will-change: transform"></div>
<div id=target></div>
)HTML");
PaintLayer* target =
ToLayoutBoxModelObject(GetLayoutObjectByElementId("target"))->Layer();
EXPECT_FALSE(target->GetCompositingReasons());
// Now make |target| self-painting.
GetDocument().getElementById("target")->setAttribute(html_names::kStyleAttr,
"position: relative");
UpdateAllLifecyclePhasesForTest();
EXPECT_EQ(CompositingReason::kOverlap, target->GetCompositingReasons());
}
TEST_F(CompositingRequirementsUpdaterTest,
NoDescendantReasonForNonSelfPaintingLayer) {
SetBodyInnerHTML(R"HTML(
<style>
#target {
overflow: auto;
width: 100px;
height: 100px;
}
</style>
<div id=target>
<div style="backface-visibility: hidden"></div>
</div>
)HTML");
PaintLayer* target =
ToLayoutBoxModelObject(GetLayoutObjectByElementId("target"))->Layer();
EXPECT_FALSE(target->GetCompositingReasons());
// Now make |target| self-painting.
GetDocument().getElementById("target")->setAttribute(html_names::kStyleAttr,
"position: relative");
UpdateAllLifecyclePhasesForTest();
EXPECT_EQ(CompositingReason::kClipsCompositingDescendants,
target->GetCompositingReasons());
}
// This test sets up a situation where a squashed PaintLayer loses its
// backing, but does not change visual rect. Therefore the compositing system
// must invalidate it because of change of backing.
TEST_F(CompositingRequirementsUpdaterTest,
NeedsLayerAssignmentAfterSquashingRemoval) {
SetBodyInnerHTML(R"HTML(
<style>
* {
margin: 0
}
#target {
width: 100px; height: 100px; backface-visibility: hidden
}
div {
width: 100px; height: 100px;
position: absolute;
background: lightblue;
top: 0px;
}
</style>
<div id=target></div>
<div id=squashed></div>
)HTML");
PaintLayer* squashed =
ToLayoutBoxModelObject(GetLayoutObjectByElementId("squashed"))->Layer();
EXPECT_EQ(kPaintsIntoGroupedBacking, squashed->GetCompositingState());
GetDocument().View()->SetTracksPaintInvalidations(true);
GetDocument().getElementById("target")->setAttribute(html_names::kStyleAttr,
"display: none");
UpdateAllLifecyclePhasesForTest();
EXPECT_EQ(kNotComposited, squashed->GetCompositingState());
auto* tracking = GetDocument()
.View()
->GetLayoutView()
->Layer()
->GraphicsLayerBacking()
->GetRasterInvalidationTracking();
EXPECT_TRUE(tracking->HasInvalidations());
EXPECT_EQ(IntRect(0, 0, 100, 100), tracking->Invalidations()[0].rect);
}
} // namespace blink
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