[mapToVisualRectInAncestorSpace] Check for detached iframes.

third_party/WebKit/Source/core/layout/VisualRectMappingTest.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/LayoutView.h"
 #include "core/layout/PaintInvalidationState.h"
 #include "core/paint/PaintLayer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 138 matching lines @@
 
     LayoutBlock* frameContainer = toLayoutBlock(getLayoutObjectByElementId("frameContainer"));
     LayoutObject* target = frameDocument.getElementById("target")->layoutObject();
     LayoutRect rect(0, 0, 100, 100);
     EXPECT_TRUE(target->mapToVisualRectInAncestorSpace(frameContainer, rect));
     // When passing from the iframe to the parent frame, the rect of (0.5, 0, 100, 100) is expanded to (0, 0, 100, 100), and then offset by
     // the 0.5 offset of frameContainer.
     EXPECT_EQ(LayoutRect(LayoutPoint(DoublePoint(0.5, 0)), LayoutSize(101, 100)), rect);
 }
 
+TEST_F(VisualRectMappingTest, LayoutViewDisplayNone)
+{
+    document().setBaseURLOverride(KURL(ParsedURLString, "http://test.com"));
+    setBodyInnerHTML(
+        "<style>body { margin: 0; }</style>"
+        "<div id=frameContainer>"
+        "  <iframe id=frame src='http://test.com' width='50' height='50' frameBorder='0'></iframe>"
+        "</div>");
+
+    Document& frameDocument = setupChildIframe("frame", "<style>body { margin: 0; }</style><div style='width:100px;height:100px;'></div>");
+    document().view()->updateAllLifecyclePhases();
+
+    LayoutBlock* frameContainer = toLayoutBlock(getLayoutObjectByElementId("frameContainer"));
+    LayoutBlock* frameBody = toLayoutBlock(frameDocument.body()->layoutObject());
+    LayoutBlock* frameDiv = toLayoutBlock(frameBody->lastChild());
+
+    // This part is copied from the LayoutView test, just to ensure that the mapped
+    // rect is valid before display:none is set on the iframe.
+    frameDocument.view()->setScrollPosition(DoublePoint(0, 47), ProgrammaticScroll);
+    LayoutRect originalRect(4, 60, 20, 80);
+    LayoutRect rect = originalRect;
+    EXPECT_TRUE(frameDiv->mapToVisualRectInAncestorSpace(frameContainer, rect));
+    EXPECT_EQ(rect, LayoutRect(4, 13, 20, 37));
+
+    Element* frameElement = document().getElementById("frame");
+    frameElement->setInlineStyleProperty(CSSPropertyDisplay, "none");
+    document().view()->updateAllLifecyclePhases();
+
+    rect = originalRect;
+    EXPECT_FALSE(frameDiv->mapToVisualRectInAncestorSpace(&layoutView(), rect));
+    EXPECT_EQ(rect, LayoutRect());
+}
+
 TEST_F(VisualRectMappingTest, SelfFlippedWritingMode)
 {
     setBodyInnerHTML(
         "<div id='target' style='writing-mode: vertical-rl; box-shadow: 40px 20px black;"
         "    width: 100px; height: 50px; position: absolute; top: 111px; left: 222px'>"
         "</div>");
 
     LayoutBlock* target = toLayoutBlock(getLayoutObjectByElementId("target"));
     LayoutRect overflowRect = target->localOverflowRectForPaintInvalidation();
     // -40 = -box_shadow_offset_x(40) (with target's top-right corner as the origin)
@@ skipping 344 matching lines @@
     LayoutRect absoluteOverflowRect = absolute->localOverflowRectForPaintInvalidation();
     EXPECT_EQ(LayoutRect(0, 0, 50, 50), absoluteOverflowRect);
     LayoutRect rect = absoluteOverflowRect;
     EXPECT_TRUE(absolute->mapToVisualRectInAncestorSpace(stackingContext, rect));
     // -172 = top(50) - y_offset_of_stacking_context(222)
     EXPECT_EQ(LayoutRect(50, -172, 50, 50), rect);
     checkPaintInvalidationStateRectMapping(rect, absoluteOverflowRect, *absolute, layoutView(), *stackingContext);
 }
 
 } // namespace blink