Make computeInlineBoxPosition() to handle unicode-bidi:isolate correctly

third_party/WebKit/Source/core/editing/VisibleUnitsTest.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/editing/VisibleUnits.h"
 
 #include "core/dom/Text.h"
 #include "core/editing/EditingTestBase.h"
 #include "core/editing/VisiblePosition.h"
 #include "core/html/HTMLTextFormControlElement.h"
 #include "core/layout/LayoutTextFragment.h"
-#include "core/layout/line/InlineBox.h"
+#include "core/layout/line/InlineTextBox.h"
 #include <ostream> // NOLINT
 
 namespace blink {
 
 namespace {
 
 PositionWithAffinity positionWithAffinityInDOMTree(Node& anchor, int offset, TextAffinity affinity = TextAffinity::Downstream)
 {
     return PositionWithAffinity(canonicalPositionOf(Position(&anchor, offset)), affinity);
 }
@@ skipping 216 matching lines @@
     EXPECT_EQ(computeInlineBoxPosition(PositionInFlatTree(three, 0), TextAffinity::Downstream), computeInlineBoxPosition(createVisiblePositionInFlatTree(*three, 0)));
     EXPECT_EQ(computeInlineBoxPosition(PositionInFlatTree(three, 1), TextAffinity::Downstream), computeInlineBoxPosition(createVisiblePositionInFlatTree(*three, 1)));
 
     EXPECT_EQ(computeInlineBoxPosition(PositionInFlatTree(four, 0), TextAffinity::Downstream), computeInlineBoxPosition(createVisiblePositionInFlatTree(*four, 0)));
     EXPECT_EQ(computeInlineBoxPosition(PositionInFlatTree(four, 1), TextAffinity::Downstream), computeInlineBoxPosition(createVisiblePositionInFlatTree(*four, 1)));
 
     EXPECT_EQ(computeInlineBoxPosition(PositionInFlatTree(five, 0), TextAffinity::Downstream), computeInlineBoxPosition(createVisiblePositionInFlatTree(*five, 0)));
     EXPECT_EQ(computeInlineBoxPosition(PositionInFlatTree(five, 1), TextAffinity::Downstream), computeInlineBoxPosition(createVisiblePositionInFlatTree(*five, 1)));
 }
 
+TEST_F(VisibleUnitsTest, computeInlineBoxPositionBidiIsolate)
+{
+    // "|" is bidi-level 0, and "foo" and "bar" are bidi-level 2
+    setBodyContent("|<span id=sample style='unicode-bidi: isolate;'>foo<br>bar</span>|");
+
+    Element* sample = document().getElementById("sample");
+    Node* text = sample->firstChild();
+
+    const InlineBoxPosition& actual = computeInlineBoxPosition(Position(text, 0), TextAffinity::Downstream);
+    EXPECT_EQ(toLayoutText(text->layoutObject())->firstTextBox(), actual.inlineBox);
+}
+
 TEST_F(VisibleUnitsTest, endOfDocument)
 {
     const char* bodyContent = "<a id=host><b id=one>1</b><b id=two>22</b></a>";
     const char* shadowContent = "<p><content select=#two></content></p><p><content select=#one></content></p>";
     setBodyContent(bodyContent);
     setShadowContent(shadowContent, "host");
 
     Element* one = document().getElementById("one");
     Element* two = document().getElementById("two");
 
@@ skipping 1056 matching lines @@
 {
     // Repro case of crbug.com/584030
     const char* bodyContent = "<button><rt><script>document.designMode = 'on'</script></rt></button>";
     setBodyContent(bodyContent);
 
     Node* button = document().querySelector("button");
     EXPECT_TRUE(endsOfNodeAreVisuallyDistinctPositions(button));
 }
 
 } // namespace blink