Move LeftPositionOf() and RightPositionOf() to SelectionModifierCharacter.cpp

third_party/WebKit/Source/core/editing/SelectionModifierTest.cpp

+// Copyright 2017 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/SelectionModifier.h"
+
+#include "core/editing/EditingTestBase.h"
+
+namespace blink {
+
+class SelectionModifierTest : public EditingTestBase {};
+
+TEST_F(SelectionModifierTest, leftPositionOf) {
+  const char* body_content =
+      "<b id=zero>0</b><p id=host><b id=one>1</b><b id=two>22</b></p><b "
+      "id=three>333</b>";
+  const char* shadow_content =
+      "<b id=four>4444</b><content select=#two></content><content "
+      "select=#one></content><b id=five>55555</b>";
+  SetBodyContent(body_content);
+  ShadowRoot* shadow_root = SetShadowContent(shadow_content, "host");
+
+  Element* one = GetDocument().getElementById("one");
+  Element* two = GetDocument().getElementById("two");
+  Element* three = GetDocument().getElementById("three");
+  Element* four = shadow_root->getElementById("four");
+  Element* five = shadow_root->getElementById("five");
+
+  EXPECT_EQ(
+      Position(two->firstChild(), 1),
+      LeftPositionOf(CreateVisiblePosition(Position(one, 0))).DeepEquivalent());
+  EXPECT_EQ(PositionInFlatTree(two->firstChild(), 1),
+            LeftPositionOf(CreateVisiblePosition(PositionInFlatTree(one, 0)))
+                .DeepEquivalent());
+
+  EXPECT_EQ(
+      Position(one->firstChild(), 0),
+      LeftPositionOf(CreateVisiblePosition(Position(two, 0))).DeepEquivalent());
+  EXPECT_EQ(PositionInFlatTree(four->firstChild(), 3),
+            LeftPositionOf(CreateVisiblePosition(PositionInFlatTree(two, 0)))
+                .DeepEquivalent());
+
+  EXPECT_EQ(Position(two->firstChild(), 2),
+            LeftPositionOf(CreateVisiblePosition(Position(three, 0)))
+                .DeepEquivalent());
+  EXPECT_EQ(PositionInFlatTree(five->firstChild(), 5),
+            LeftPositionOf(CreateVisiblePosition(PositionInFlatTree(three, 0)))
+                .DeepEquivalent());
+}
+
+TEST_F(SelectionModifierTest, rightPositionOf) {
+  const char* body_content =
+      "<b id=zero>0</b><p id=host><b id=one>1</b><b id=two>22</b></p><b "
+      "id=three>333</b>";
+  const char* shadow_content =
+      "<p id=four>4444</p><content select=#two></content><content "
+      "select=#one></content><p id=five>55555</p>";
+  SetBodyContent(body_content);
+  ShadowRoot* shadow_root = SetShadowContent(shadow_content, "host");
+
+  Node* one = GetDocument().getElementById("one")->firstChild();
+  Node* two = GetDocument().getElementById("two")->firstChild();
+  Node* three = GetDocument().getElementById("three")->firstChild();
+  Node* four = shadow_root->getElementById("four")->firstChild();
+  Node* five = shadow_root->getElementById("five")->firstChild();
+
+  EXPECT_EQ(Position(), RightPositionOf(CreateVisiblePosition(Position(one, 1)))
+                            .DeepEquivalent());
+  EXPECT_EQ(PositionInFlatTree(five, 0),
+            RightPositionOf(CreateVisiblePosition(PositionInFlatTree(one, 1)))
+                .DeepEquivalent());
+
+  EXPECT_EQ(Position(one, 1),
+            RightPositionOf(CreateVisiblePosition(Position(two, 2)))
+                .DeepEquivalent());
+  EXPECT_EQ(PositionInFlatTree(one, 1),
+            RightPositionOf(CreateVisiblePosition(PositionInFlatTree(two, 2)))
+                .DeepEquivalent());
+
+  EXPECT_EQ(Position(five, 0),
+            RightPositionOf(CreateVisiblePosition(Position(four, 4)))
+                .DeepEquivalent());
+  EXPECT_EQ(PositionInFlatTree(two, 0),
+            RightPositionOf(CreateVisiblePosition(PositionInFlatTree(four, 4)))
+                .DeepEquivalent());
+
+  EXPECT_EQ(Position(),
+            RightPositionOf(CreateVisiblePosition(Position(five, 5)))
+                .DeepEquivalent());
+  EXPECT_EQ(PositionInFlatTree(three, 0),
+            RightPositionOf(CreateVisiblePosition(PositionInFlatTree(five, 5)))
+                .DeepEquivalent());
+}
+
+}  // namespace blink