// Copyright 2016 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/insert_list_command.h"

#include "third_party/blink/renderer/core/dom/parent_node.h"
#include "third_party/blink/renderer/core/dom/text.h"
#include "third_party/blink/renderer/core/editing/frame_selection.h"
#include "third_party/blink/renderer/core/editing/selection_template.h"
#include "third_party/blink/renderer/core/editing/testing/editing_test_base.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"

namespace blink {

class InsertListCommandTest : public EditingTestBase {};

TEST_F(InsertListCommandTest, ShouldCleanlyRemoveSpuriousTextNode) {
  GetDocument().SetCompatibilityMode(Document::kQuirksMode);
  // Needs to be editable to use InsertListCommand.
  GetDocument().setDesignMode("on");
  // Set up the condition:
  // * Selection is a range, to go down into
  //   InsertListCommand::listifyParagraph.
  // * The selection needs to have a sibling list to go down into
  //   InsertListCommand::mergeWithNeighboringLists.
  // * Should be the same type (ordered list) to go into
  //   CompositeEditCommand::mergeIdenticalElements.
  // * Should have no actual children to fail the listChildNode check
  //   in InsertListCommand::doApplyForSingleParagraph.
  // * There needs to be an extra text node to trigger its removal in
  //   CompositeEditCommand::mergeIdenticalElements.
  // The removeNode is what updates document lifecycle to VisualUpdatePending
  // and makes FrameView::needsLayout return true.
  SetBodyContent("\nd\n<ol>");
  Text* empty_text = GetDocument().createTextNode("");
  GetDocument().body()->InsertBefore(empty_text,
                                     GetDocument().body()->firstChild());
  UpdateAllLifecyclePhasesForTest();
  GetDocument().GetFrame()->Selection().SetSelection(
      SelectionInDOMTree::Builder()
          .Collapse(Position(GetDocument().body(), 0))
          .Extend(Position(GetDocument().body(), 2))
          .Build(),
      SetSelectionOptions());

  auto* command = MakeGarbageCollected<InsertListCommand>(
      GetDocument(), InsertListCommand::kOrderedList);
  // This should not DCHECK.
  EXPECT_TRUE(command->Apply())
      << "The insert ordered list command should have succeeded";
  EXPECT_EQ("<ol><li>\nd\n</li></ol>", GetDocument().body()->innerHTML());
}

// Refer https://crbug.com/794356
TEST_F(InsertListCommandTest, UnlistifyParagraphCrashOnVisuallyEmptyParagraph) {
  GetDocument().setDesignMode("on");
  Selection().SetSelection(
      SetSelectionTextToBody("^<dl>"
                             "<textarea style='float:left;'></textarea>"
                             "</dl>|"),
      SetSelectionOptions());
  auto* command = MakeGarbageCollected<InsertListCommand>(
      GetDocument(), InsertListCommand::kUnorderedList);
  // Crash happens here.
  EXPECT_FALSE(command->Apply());
  EXPECT_EQ(
      "<dl><ul>"
      "|<textarea style=\"float:left;\"></textarea>"
      "</ul></dl>",
      GetSelectionTextFromBody());
}

TEST_F(InsertListCommandTest, UnlistifyParagraphCrashOnNonLi) {
  // Checks that InsertOrderedList does not cause a crash when the caret is in a
  // non-<li> child of a list which contains non-<li> blocks.
  GetDocument().setDesignMode("on");
  Selection().SetSelection(SetSelectionTextToBody("<ol><div>|"
                                                  "<p>foo</p><p>bar</p>"
                                                  "</div></ol>"),
                           SetSelectionOptions());
  auto* command = MakeGarbageCollected<InsertListCommand>(
      GetDocument(), InsertListCommand::kOrderedList);
  // Crash happens here.
  EXPECT_TRUE(command->Apply());
  EXPECT_EQ("|foo<br><ol><p>bar</p></ol>", GetSelectionTextFromBody());
}

// Refer https://crbug.com/798176
TEST_F(InsertListCommandTest, CleanupNodeSameAsDestinationNode) {
  GetDocument().setDesignMode("on");
  InsertStyleElement(
      "* { -webkit-appearance:checkbox; }"
      "br { visibility:hidden; }"
      "colgroup { -webkit-column-count:2; }");
  Selection().SetSelection(SetSelectionTextToBody("^<table><col></table>"
                                                  "<button></button>|"),
                           SetSelectionOptions());
  auto* command = MakeGarbageCollected<InsertListCommand>(
      GetDocument(), InsertListCommand::kUnorderedList);
  // Crash happens here.
  EXPECT_TRUE(command->Apply());
  EXPECT_EQ(
      "<ul><li><table><colgroup><col>"
      "</colgroup></table></li>"
      "<li><button>|</button></li></ul><br>",
      GetSelectionTextFromBody());
}

TEST_F(InsertListCommandTest, InsertListOnEmptyHiddenElements) {
  GetDocument().setDesignMode("on");
  InsertStyleElement("br { visibility:hidden; }");
  Selection().SetSelection(SetSelectionTextToBody("^<button></button>|"),
                           SetSelectionOptions());
  auto* command = MakeGarbageCollected<InsertListCommand>(
      GetDocument(), InsertListCommand::kUnorderedList);

  // Crash happens here.
  EXPECT_FALSE(command->Apply());
  EXPECT_EQ(
      "<button>"
      "|<ul><li><br></li></ul>"
      "</button>",
      GetSelectionTextFromBody());
}

// Refer https://crbug.com/797520
TEST_F(InsertListCommandTest, InsertListWithCollapsedVisibility) {
  GetDocument().setDesignMode("on");
  InsertStyleElement(
      "ul { visibility:collapse; }"
      "dl { visibility:visible; }");

  Selection().SetSelection(SetSelectionTextToBody("^<dl>a</dl>|"),
                           SetSelectionOptions());
  auto* command = MakeGarbageCollected<InsertListCommand>(
      GetDocument(), InsertListCommand::kOrderedList);

  // Crash happens here.
  EXPECT_FALSE(command->Apply());
  EXPECT_EQ(
      "<dl>"
      "<ol></ol><ul>^a|</ul>"
      "</dl>",
      GetSelectionTextFromBody());
}
}