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File: Outdent.js
/**
 * Outdent.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2017 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

define(
  'tinymce.plugins.lists.actions.Outdent',
  [
    'tinymce.core.dom.DOMUtils',
    'tinymce.plugins.lists.core.Bookmark',
    'tinymce.plugins.lists.core.NodeType',
    'tinymce.plugins.lists.core.NormalizeLists',
    'tinymce.plugins.lists.core.Selection',
    'tinymce.plugins.lists.core.SplitList',
    'tinymce.plugins.lists.core.TextBlock'
  ],
  function (DOMUtils, Bookmark, NodeType, NormalizeLists, Selection, SplitList, TextBlock) {
    var DOM = DOMUtils.DOM;

    var removeEmptyLi = function (dom, li) {
      if (NodeType.isEmpty(dom, li)) {
        DOM.remove(li);
      }
    };

    var outdent = function (editor, li) {
      var ul = li.parentNode, ulParent = ul.parentNode, newBlock;

      if (ul === editor.getBody()) {
        return true;
      }

      if (li.nodeName === 'DD') {
        DOM.rename(li, 'DT');
        return true;
      }

      if (NodeType.isFirstChild(li) && NodeType.isLastChild(li)) {
        if (ulParent.nodeName === "LI") {
          DOM.insertAfter(li, ulParent);
          removeEmptyLi(editor.dom, ulParent);
          DOM.remove(ul);
        } else if (NodeType.isListNode(ulParent)) {
          DOM.remove(ul, true);
        } else {
          ulParent.insertBefore(TextBlock.createNewTextBlock(editor, li), ul);
          DOM.remove(ul);
        }

        return true;
      } else if (NodeType.isFirstChild(li)) {
        if (ulParent.nodeName === "LI") {
          DOM.insertAfter(li, ulParent);
          li.appendChild(ul);
          removeEmptyLi(editor.dom, ulParent);
        } else if (NodeType.isListNode(ulParent)) {
          ulParent.insertBefore(li, ul);
        } else {
          ulParent.insertBefore(TextBlock.createNewTextBlock(editor, li), ul);
          DOM.remove(li);
        }

        return true;
      } else if (NodeType.isLastChild(li)) {
        if (ulParent.nodeName === "LI") {
          DOM.insertAfter(li, ulParent);
        } else if (NodeType.isListNode(ulParent)) {
          DOM.insertAfter(li, ul);
        } else {
          DOM.insertAfter(TextBlock.createNewTextBlock(editor, li), ul);
          DOM.remove(li);
        }

        return true;
      }

      if (ulParent.nodeName === 'LI') {
        ul = ulParent;
        newBlock = TextBlock.createNewTextBlock(editor, li, 'LI');
      } else if (NodeType.isListNode(ulParent)) {
        newBlock = TextBlock.createNewTextBlock(editor, li, 'LI');
      } else {
        newBlock = TextBlock.createNewTextBlock(editor, li);
      }

      SplitList.splitList(editor, ul, li, newBlock);
      NormalizeLists.normalizeLists(editor.dom, ul.parentNode);

      return true;
    };

    var outdentSelection = function (editor) {
      var listElements = Selection.getSelectedListItems(editor);

      if (listElements.length) {
        var bookmark = Bookmark.createBookmark(editor.selection.getRng(true));
        var i, y, root = editor.getBody();

        i = listElements.length;
        while (i--) {
          var node = listElements[i].parentNode;

          while (node && node !== root) {
            y = listElements.length;
            while (y--) {
              if (listElements[y] === node) {
                listElements.splice(i, 1);
                break;
              }
            }

            node = node.parentNode;
          }
        }

        for (i = 0; i < listElements.length; i++) {
          if (!outdent(editor, listElements[i]) && i === 0) {
            break;
          }
        }

        editor.selection.setRng(Bookmark.resolveBookmark(bookmark));
        editor.nodeChanged();

        return true;
      }
    };

    return {
      outdent: outdent,
      outdentSelection: outdentSelection
    };
  }
);