// 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 "third_party/blink/renderer/core/editing/commands/set_character_data_command.h"

#include "third_party/blink/renderer/core/editing/commands/editing_state.h"
#include "third_party/blink/renderer/core/editing/testing/editing_test_base.h"
#include "third_party/blink/renderer/core/layout/layout_text_combine.h"

namespace blink {

class SetCharacterDataCommandTest : public EditingTestBase {};

TEST_F(SetCharacterDataCommandTest, replaceTextWithSameLength) {
  SetBodyContent("<div contenteditable>This is a good test case</div>");

  SimpleEditCommand* command = MakeGarbageCollected<SetCharacterDataCommand>(
      To<Text>(GetDocument().body()->firstChild()->firstChild()), 10, 4,
      "lame");

  command->DoReapply();
  EXPECT_EQ(
      "This is a lame test case",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());

  command->DoUnapply();
  EXPECT_EQ(
      "This is a good test case",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());
}

TEST_F(SetCharacterDataCommandTest, replaceTextWithLongerText) {
  SetBodyContent("<div contenteditable>This is a good test case</div>");

  SimpleEditCommand* command = MakeGarbageCollected<SetCharacterDataCommand>(
      To<Text>(GetDocument().body()->firstChild()->firstChild()), 10, 4,
      "lousy");

  command->DoReapply();
  EXPECT_EQ(
      "This is a lousy test case",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());

  command->DoUnapply();
  EXPECT_EQ(
      "This is a good test case",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());
}

TEST_F(SetCharacterDataCommandTest, replaceTextWithShorterText) {
  SetBodyContent("<div contenteditable>This is a good test case</div>");

  SimpleEditCommand* command = MakeGarbageCollected<SetCharacterDataCommand>(
      To<Text>(GetDocument().body()->firstChild()->firstChild()), 10, 4, "meh");

  command->DoReapply();
  EXPECT_EQ(
      "This is a meh test case",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());

  command->DoUnapply();
  EXPECT_EQ(
      "This is a good test case",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());
}

TEST_F(SetCharacterDataCommandTest, insertTextIntoEmptyNode) {
  SetBodyContent("<div contenteditable />");

  GetDocument().body()->firstChild()->appendChild(
      GetDocument().CreateEditingTextNode(""));

  SimpleEditCommand* command = MakeGarbageCollected<SetCharacterDataCommand>(
      To<Text>(GetDocument().body()->firstChild()->firstChild()), 0, 0,
      "hello");

  command->DoReapply();
  EXPECT_EQ(
      "hello",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());

  command->DoUnapply();
  EXPECT_EQ(
      "",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());
}

TEST_F(SetCharacterDataCommandTest, insertTextAtEndOfNonEmptyNode) {
  SetBodyContent("<div contenteditable>Hello</div>");

  SimpleEditCommand* command = MakeGarbageCollected<SetCharacterDataCommand>(
      To<Text>(GetDocument().body()->firstChild()->firstChild()), 5, 0,
      ", world!");

  command->DoReapply();
  EXPECT_EQ(
      "Hello, world!",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());

  command->DoUnapply();
  EXPECT_EQ(
      "Hello",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());
}

TEST_F(SetCharacterDataCommandTest, replaceEntireNode) {
  SetBodyContent("<div contenteditable>Hello</div>");

  SimpleEditCommand* command = MakeGarbageCollected<SetCharacterDataCommand>(
      To<Text>(GetDocument().body()->firstChild()->firstChild()), 0, 5, "Bye");

  command->DoReapply();
  EXPECT_EQ(
      "Bye",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());

  command->DoUnapply();
  EXPECT_EQ(
      "Hello",
      To<Text>(GetDocument().body()->firstChild()->firstChild())->wholeText());
}

TEST_F(SetCharacterDataCommandTest, CombinedText) {
  SetBodyContent(
      "<div contenteditable style='writing-mode:vertical-lr; "
      "-webkit-text-combine:horizontal' />");

  auto* text_node = To<Text>(GetDocument().body()->firstChild()->appendChild(
      GetDocument().CreateEditingTextNode("")));
  UpdateAllLifecyclePhasesForTest();

  ASSERT_TRUE(text_node->GetLayoutObject());
  ASSERT_TRUE(text_node->GetLayoutObject()->IsCombineText());
  EXPECT_FALSE(
      To<LayoutTextCombine>(text_node->GetLayoutObject())->IsCombined());

  SimpleEditCommand* command =
      MakeGarbageCollected<SetCharacterDataCommand>(text_node, 0, 0, "text");
  command->DoReapply();
  UpdateAllLifecyclePhasesForTest();

  ASSERT_TRUE(text_node->GetLayoutObject());
  ASSERT_TRUE(text_node->GetLayoutObject()->IsCombineText());
  EXPECT_TRUE(
      To<LayoutTextCombine>(text_node->GetLayoutObject())->IsCombined());

  command->DoUnapply();
  UpdateAllLifecyclePhasesForTest();

  ASSERT_TRUE(text_node->GetLayoutObject());
  ASSERT_TRUE(text_node->GetLayoutObject()->IsCombineText());
  EXPECT_FALSE(
      To<LayoutTextCombine>(text_node->GetLayoutObject())->IsCombined());
}

}  // namespace blink