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File: Indent.js
/**
 * Indent.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.Indent',
  [
    'tinymce.core.dom.DOMUtils',
    'tinymce.plugins.lists.core.Bookmark',
    'tinymce.plugins.lists.core.NodeType',
    'tinymce.plugins.lists.core.Selection'
  ],
  function (DOMUtils, Bookmark, NodeType, Selection) {
    var DOM = DOMUtils.DOM;

    var mergeLists = function (from, to) {
      var node;

      if (NodeType.isListNode(from)) {
        while ((node = from.firstChild)) {
          to.appendChild(node);
        }

        DOM.remove(from);
      }
    };

    var indent = function (li) {
      var sibling, newList, listStyle;

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

      sibling = li.previousSibling;

      if (sibling && NodeType.isListNode(sibling)) {
        sibling.appendChild(li);
        return true;
      }

      if (sibling && sibling.nodeName === 'LI' && NodeType.isListNode(sibling.lastChild)) {
        sibling.lastChild.appendChild(li);
        mergeLists(li.lastChild, sibling.lastChild);
        return true;
      }

      sibling = li.nextSibling;

      if (sibling && NodeType.isListNode(sibling)) {
        sibling.insertBefore(li, sibling.firstChild);
        return true;
      }

      /*if (sibling && sibling.nodeName === 'LI' && isListNode(li.lastChild)) {
        return false;
      }*/

      sibling = li.previousSibling;
      if (sibling && sibling.nodeName === 'LI') {
        newList = DOM.create(li.parentNode.nodeName);
        listStyle = DOM.getStyle(li.parentNode, 'listStyleType');
        if (listStyle) {
          DOM.setStyle(newList, 'listStyleType', listStyle);
        }
        sibling.appendChild(newList);
        newList.appendChild(li);
        mergeLists(li.lastChild, newList);
        return true;
      }

      return false;
    };

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

      if (listElements.length) {
        var bookmark = Bookmark.createBookmark(editor.selection.getRng(true));

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

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

        return true;
      }
    };

    return {
      indentSelection: indentSelection
    };
  }
);