[SPv2] Set an overflowClip clip node if an element has contain: paint.

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp

 // Copyright 2015 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/LayoutTestHelper.h"
 #include "core/layout/LayoutTreeAsText.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/paint/ObjectPaintProperties.h"
 #include "core/paint/PaintPropertyTreePrinter.h"
 #include "platform/graphics/paint/GeometryMapper.h"
@@ skipping 1630 matching lines @@
     EXPECT_EQ(framePreTranslation(), contentsProperties.transform);
     EXPECT_EQ(clipProperties->overflowClip(), contentsProperties.clip);
 
     EXPECT_EQ(framePreTranslation(), childProperties->localBorderBoxProperties()->geometryPropertyTreeState.transform);
     EXPECT_EQ(clipProperties->overflowClip(), childProperties->localBorderBoxProperties()->geometryPropertyTreeState.clip);
 
     EXPECT_NE(nullptr, childProperties->localBorderBoxProperties()->geometryPropertyTreeState.effect);
     CHECK_EXACT_VISUAL_RECT(LayoutRect(0, 0, 500, 600), child, clipper);
 }
 
+TEST_P(PaintPropertyTreeBuilderTest, ContainsPaintContentsProperties)
+{
+    setBodyInnerHTML(
+        "<style>body { margin: 0; }</style>"
+        "<div id='clipper' style='contain:paint; width:400px; height:300px;'>"
+        "  <div id='child' style='position:relative; width:500px; height: 600px;'></div>"
+        "</div>"
+    );
+
+    LayoutBoxModelObject* clipper = toLayoutBoxModelObject(document().getElementById("clipper")->layoutObject());
+    const ObjectPaintProperties* clipProperties = clipper->objectPaintProperties();
+    LayoutObject* child = document().getElementById("child")->layoutObject();
+    const ObjectPaintProperties* childProperties = child->objectPaintProperties();
+
+    // No scroll translation because the document does not scroll (not enough content).
+    EXPECT_TRUE(!frameScrollTranslation());
+    EXPECT_EQ(framePreTranslation(), clipProperties->localBorderBoxProperties()->geometryPropertyTreeState.transform);
+    EXPECT_EQ(frameContentClip(), clipProperties->localBorderBoxProperties()->geometryPropertyTreeState.clip);
+
+    GeometryPropertyTreeState contentsProperties;
+    clipProperties->getContentsProperties(contentsProperties);
+    EXPECT_EQ(framePreTranslation(), contentsProperties.transform);
+    EXPECT_EQ(clipProperties->overflowClip(), contentsProperties.clip);
+
+    EXPECT_EQ(framePreTranslation(), childProperties->localBorderBoxProperties()->geometryPropertyTreeState.transform);
+    EXPECT_EQ(clipProperties->overflowClip(), childProperties->localBorderBoxProperties()->geometryPropertyTreeState.clip);
+
+    EXPECT_NE(nullptr, childProperties->localBorderBoxProperties()->geometryPropertyTreeState.effect);
+    CHECK_EXACT_VISUAL_RECT(LayoutRect(0, 0, 500, 600), child, clipper);
+}
+
 TEST_P(PaintPropertyTreeBuilderTest, OverflowScrollContentsProperties)
 {
     // This test verifies the tree builder correctly computes and records the property tree context
     // for a (pseudo) stacking context that is scrolled by a containing block that is not one of
     // the painting ancestors.
     setBodyInnerHTML(
         "<style>body { margin: 0; }</style>"
         "<div id='clipper' style='overflow:scroll; width:400px; height:300px;'>"
         "  <div id='child' style='position:relative; width:500px; height: 600px;'></div>"
         "  <div style='width: 200px; height: 10000px'></div>"
@@ skipping 458 matching lines @@
 
     // Removing a main thread scrolling reason should update the entire tree.
     overflowB->removeAttribute("class");
     document().view()->updateAllLifecyclePhases();
     EXPECT_FALSE(overflowA->layoutObject()->objectPaintProperties()->scroll()->hasMainThreadScrollingReasons(MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects));
     EXPECT_FALSE(overflowB->layoutObject()->objectPaintProperties()->scroll()->hasMainThreadScrollingReasons(MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects));
     EXPECT_FALSE(overflowB->layoutObject()->objectPaintProperties()->scroll()->parent()->hasMainThreadScrollingReasons(MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects));
 }
 
 } // namespace blink