tabledrag.js

/**
* DO NOT EDIT THIS FILE.
* See the following change record for more information,
* https://www.drupal.org/node/2815083
* @preserve
**/

(function ($, Drupal, drupalSettings) {
  var showWeight = JSON.parse(localStorage.getItem('Drupal.tableDrag.showWeight'));

  Drupal.behaviors.tableDrag = {
    attach: function attach(context, settings) {
      function initTableDrag(table, base) {
        if (table.length) {
          Drupal.tableDrag[base] = new Drupal.tableDrag(table[0], settings.tableDrag[base]);
        }
      }

      for (var base in settings.tableDrag) {
        if (settings.tableDrag.hasOwnProperty(base)) {
          initTableDrag($(context).find('#' + base).once('tabledrag'), base);
        }
      }
    }
  };

  Drupal.tableDrag = function (table, tableSettings) {
    var self = this;
    var $table = $(table);

    this.$table = $(table);

    this.table = table;

    this.tableSettings = tableSettings;

    this.dragObject = null;

    this.rowObject = null;

    this.oldRowElement = null;

    this.oldY = 0;

    this.changed = false;

    this.maxDepth = 0;

    this.rtl = $(this.table).css('direction') === 'rtl' ? -1 : 1;

    this.striping = $(this.table).data('striping') === 1;

    this.scrollSettings = { amount: 4, interval: 50, trigger: 70 };

    this.scrollInterval = null;

    this.scrollY = 0;

    this.windowHeight = 0;

    this.indentEnabled = false;
    for (var group in tableSettings) {
      if (tableSettings.hasOwnProperty(group)) {
        for (var n in tableSettings[group]) {
          if (tableSettings[group].hasOwnProperty(n)) {
            if (tableSettings[group][n].relationship === 'parent') {
              this.indentEnabled = true;
            }
            if (tableSettings[group][n].limit > 0) {
              this.maxDepth = tableSettings[group][n].limit;
            }
          }
        }
      }
    }
    if (this.indentEnabled) {
      this.indentCount = 1;

      var indent = Drupal.theme('tableDragIndentation');
      var testRow = $('<tr/>').addClass('draggable').appendTo(table);
      var testCell = $('<td/>').appendTo(testRow).prepend(indent).prepend(indent);
      var $indentation = testCell.find('.js-indentation');

      this.indentAmount = $indentation.get(1).offsetLeft - $indentation.get(0).offsetLeft;
      testRow.remove();
    }

    $table.find('> tr.draggable, > tbody > tr.draggable').each(function () {
      self.makeDraggable(this);
    });

    $table.before($('<button type="button" class="link tabledrag-toggle-weight"></button>').attr('title', Drupal.t('Re-order rows by numerical weight instead of dragging.')).on('click', $.proxy(function (e) {
      e.preventDefault();
      this.toggleColumns();
    }, this)).wrap('<div class="tabledrag-toggle-weight-wrapper"></div>').parent());

    self.initColumns();

    $(document).on('touchmove', function (event) {
      return self.dragRow(event.originalEvent.touches[0], self);
    });
    $(document).on('touchend', function (event) {
      return self.dropRow(event.originalEvent.touches[0], self);
    });
    $(document).on('mousemove pointermove', function (event) {
      return self.dragRow(event, self);
    });
    $(document).on('mouseup pointerup', function (event) {
      return self.dropRow(event, self);
    });

    $(window).on('storage', $.proxy(function (e) {
      if (e.originalEvent.key === 'Drupal.tableDrag.showWeight') {
        showWeight = JSON.parse(e.originalEvent.newValue);
        this.displayColumns(showWeight);
      }
    }, this));
  };

  Drupal.tableDrag.prototype.initColumns = function () {
    var $table = this.$table;
    var hidden = void 0;
    var cell = void 0;
    var columnIndex = void 0;
    for (var group in this.tableSettings) {
      if (this.tableSettings.hasOwnProperty(group)) {
        for (var d in this.tableSettings[group]) {
          if (this.tableSettings[group].hasOwnProperty(d)) {
            var field = $table.find('.' + this.tableSettings[group][d].target).eq(0);
            if (field.length && this.tableSettings[group][d].hidden) {
              hidden = this.tableSettings[group][d].hidden;
              cell = field.closest('td');
              break;
            }
          }
        }

        if (hidden && cell[0]) {
          columnIndex = cell.parent().find('> td').index(cell.get(0)) + 1;
          $table.find('> thead > tr, > tbody > tr, > tr').each(this.addColspanClass(columnIndex));
        }
      }
    }
    this.displayColumns(showWeight);
  };

  Drupal.tableDrag.prototype.addColspanClass = function (columnIndex) {
    return function () {
      var $row = $(this);
      var index = columnIndex;
      var cells = $row.children();
      var cell = void 0;
      cells.each(function (n) {
        if (n < index && this.colSpan && this.colSpan > 1) {
          index -= this.colSpan - 1;
        }
      });
      if (index > 0) {
        cell = cells.filter(':nth-child(' + index + ')');
        if (cell[0].colSpan && cell[0].colSpan > 1) {
          cell.addClass('tabledrag-has-colspan');
        } else {
          cell.addClass('tabledrag-hide');
        }
      }
    };
  };

  Drupal.tableDrag.prototype.displayColumns = function (displayWeight) {
    if (displayWeight) {
      this.showColumns();
    } else {
        this.hideColumns();
      }

    $('table').findOnce('tabledrag').trigger('columnschange', !!displayWeight);
  };

  Drupal.tableDrag.prototype.toggleColumns = function () {
    showWeight = !showWeight;
    this.displayColumns(showWeight);
    if (showWeight) {
      localStorage.setItem('Drupal.tableDrag.showWeight', showWeight);
    } else {
      localStorage.removeItem('Drupal.tableDrag.showWeight');
    }
  };

  Drupal.tableDrag.prototype.hideColumns = function () {
    var $tables = $('table').findOnce('tabledrag');

    $tables.find('.tabledrag-hide').css('display', 'none');

    $tables.find('.tabledrag-handle').css('display', '');

    $tables.find('.tabledrag-has-colspan').each(function () {
      this.colSpan = this.colSpan - 1;
    });

    $('.tabledrag-toggle-weight').text(Drupal.t('Show row weights'));
  };

  Drupal.tableDrag.prototype.showColumns = function () {
    var $tables = $('table').findOnce('tabledrag');

    $tables.find('.tabledrag-hide').css('display', '');

    $tables.find('.tabledrag-handle').css('display', 'none');

    $tables.find('.tabledrag-has-colspan').each(function () {
      this.colSpan = this.colSpan + 1;
    });

    $('.tabledrag-toggle-weight').text(Drupal.t('Hide row weights'));
  };

  Drupal.tableDrag.prototype.rowSettings = function (group, row) {
    var field = $(row).find('.' + group);
    var tableSettingsGroup = this.tableSettings[group];
    for (var delta in tableSettingsGroup) {
      if (tableSettingsGroup.hasOwnProperty(delta)) {
        var targetClass = tableSettingsGroup[delta].target;
        if (field.is('.' + targetClass)) {
          var rowSettings = {};
          for (var n in tableSettingsGroup[delta]) {
            if (tableSettingsGroup[delta].hasOwnProperty(n)) {
              rowSettings[n] = tableSettingsGroup[delta][n];
            }
          }
          return rowSettings;
        }
      }
    }
  };

  Drupal.tableDrag.prototype.makeDraggable = function (item) {
    var self = this;
    var $item = $(item);

    $item.find('td:first-of-type').find('a').addClass('menu-item__link');

    var handle = $('<a href="#" class="tabledrag-handle"><div class="handle">&nbsp;</div></a>').attr('title', Drupal.t('Drag to re-order'));

    var $indentationLast = $item.find('td:first-of-type').find('.js-indentation').eq(-1);
    if ($indentationLast.length) {
      $indentationLast.after(handle);

      self.indentCount = Math.max($item.find('.js-indentation').length, self.indentCount);
    } else {
      $item.find('td').eq(0).prepend(handle);
    }

    handle.on('mousedown touchstart pointerdown', function (event) {
      event.preventDefault();
      if (event.originalEvent.type === 'touchstart') {
        event = event.originalEvent.touches[0];
      }
      self.dragStart(event, self, item);
    });

    handle.on('click', function (e) {
      e.preventDefault();
    });

    handle.on('focus', function () {
      self.safeBlur = true;
    });

    handle.on('blur', function (event) {
      if (self.rowObject && self.safeBlur) {
        self.dropRow(event, self);
      }
    });

    handle.on('keydown', function (event) {
      if (event.keyCode !== 9 && !self.rowObject) {
        self.rowObject = new self.row(item, 'keyboard', self.indentEnabled, self.maxDepth, true);
      }

      var keyChange = false;
      var groupHeight = void 0;

      switch (event.keyCode) {
        case 37:
        case 63234:
          keyChange = true;
          self.rowObject.indent(-1 * self.rtl);
          break;

        case 38:
        case 63232:
          {
            var $previousRow = $(self.rowObject.element).prev('tr:first-of-type');
            var previousRow = $previousRow.get(0);
            while (previousRow && $previousRow.is(':hidden')) {
              $previousRow = $(previousRow).prev('tr:first-of-type');
              previousRow = $previousRow.get(0);
            }
            if (previousRow) {
              self.safeBlur = false;
              self.rowObject.direction = 'up';
              keyChange = true;

              if ($(item).is('.tabledrag-root')) {
                groupHeight = 0;
                while (previousRow && $previousRow.find('.js-indentation').length) {
                  $previousRow = $(previousRow).prev('tr:first-of-type');
                  previousRow = $previousRow.get(0);
                  groupHeight += $previousRow.is(':hidden') ? 0 : previousRow.offsetHeight;
                }
                if (previousRow) {
                  self.rowObject.swap('before', previousRow);

                  window.scrollBy(0, -groupHeight);
                }
              } else if (self.table.tBodies[0].rows[0] !== previousRow || $previousRow.is('.draggable')) {
                self.rowObject.swap('before', previousRow);
                self.rowObject.interval = null;
                self.rowObject.indent(0);
                window.scrollBy(0, -parseInt(item.offsetHeight, 10));
              }

              handle.trigger('focus');
            }
            break;
          }

        case 39:
        case 63235:
          keyChange = true;
          self.rowObject.indent(self.rtl);
          break;

        case 40:
        case 63233:
          {
            var $nextRow = $(self.rowObject.group).eq(-1).next('tr:first-of-type');
            var nextRow = $nextRow.get(0);
            while (nextRow && $nextRow.is(':hidden')) {
              $nextRow = $(nextRow).next('tr:first-of-type');
              nextRow = $nextRow.get(0);
            }
            if (nextRow) {
              self.safeBlur = false;
              self.rowObject.direction = 'down';
              keyChange = true;

              if ($(item).is('.tabledrag-root')) {
                groupHeight = 0;
                var nextGroup = new self.row(nextRow, 'keyboard', self.indentEnabled, self.maxDepth, false);
                if (nextGroup) {
                  $(nextGroup.group).each(function () {
                    groupHeight += $(this).is(':hidden') ? 0 : this.offsetHeight;
                  });
                  var nextGroupRow = $(nextGroup.group).eq(-1).get(0);
                  self.rowObject.swap('after', nextGroupRow);

                  window.scrollBy(0, parseInt(groupHeight, 10));
                }
              } else {
                self.rowObject.swap('after', nextRow);
                self.rowObject.interval = null;
                self.rowObject.indent(0);
                window.scrollBy(0, parseInt(item.offsetHeight, 10));
              }

              handle.trigger('focus');
            }
            break;
          }
      }

      if (self.rowObject && self.rowObject.changed === true) {
        $(item).addClass('drag');
        if (self.oldRowElement) {
          $(self.oldRowElement).removeClass('drag-previous');
        }
        self.oldRowElement = item;
        if (self.striping === true) {
          self.restripeTable();
        }
        self.onDrag();
      }

      if (keyChange) {
        return false;
      }
    });

    handle.on('keypress', function (event) {

      switch (event.keyCode) {
        case 37:
        case 38:
        case 39:
        case 40:
          return false;
      }
    });
  };

  Drupal.tableDrag.prototype.dragStart = function (event, self, item) {
    self.dragObject = {};
    self.dragObject.initOffset = self.getPointerOffset(item, event);
    self.dragObject.initPointerCoords = self.pointerCoords(event);
    if (self.indentEnabled) {
      self.dragObject.indentPointerPos = self.dragObject.initPointerCoords;
    }

    if (self.rowObject) {
      $(self.rowObject.element).find('a.tabledrag-handle').trigger('blur');
    }

    self.rowObject = new self.row(item, 'pointer', self.indentEnabled, self.maxDepth, true);

    self.table.topY = $(self.table).offset().top;
    self.table.bottomY = self.table.topY + self.table.offsetHeight;

    $(item).addClass('drag');

    $('body').addClass('drag');
    if (self.oldRowElement) {
      $(self.oldRowElement).removeClass('drag-previous');
    }
  };

  Drupal.tableDrag.prototype.dragRow = function (event, self) {
    if (self.dragObject) {
      self.currentPointerCoords = self.pointerCoords(event);
      var y = self.currentPointerCoords.y - self.dragObject.initOffset.y;
      var x = self.currentPointerCoords.x - self.dragObject.initOffset.x;

      if (y !== self.oldY) {
        self.rowObject.direction = y > self.oldY ? 'down' : 'up';

        self.oldY = y;

        var scrollAmount = self.checkScroll(self.currentPointerCoords.y);

        clearInterval(self.scrollInterval);

        if (scrollAmount > 0 && self.rowObject.direction === 'down' || scrollAmount < 0 && self.rowObject.direction === 'up') {
          self.setScroll(scrollAmount);
        }

        var currentRow = self.findDropTargetRow(x, y);
        if (currentRow) {
          if (self.rowObject.direction === 'down') {
            self.rowObject.swap('after', currentRow, self);
          } else {
            self.rowObject.swap('before', currentRow, self);
          }
          if (self.striping === true) {
            self.restripeTable();
          }
        }
      }

      if (self.indentEnabled) {
        var xDiff = self.currentPointerCoords.x - self.dragObject.indentPointerPos.x;

        var indentDiff = Math.round(xDiff / self.indentAmount);

        var indentChange = self.rowObject.indent(indentDiff);

        self.dragObject.indentPointerPos.x += self.indentAmount * indentChange * self.rtl;
        self.indentCount = Math.max(self.indentCount, self.rowObject.indents);
      }

      return false;
    }
  };

  Drupal.tableDrag.prototype.dropRow = function (event, self) {
    var droppedRow = void 0;
    var $droppedRow = void 0;

    if (self.rowObject !== null) {
      droppedRow = self.rowObject.element;
      $droppedRow = $(droppedRow);

      if (self.rowObject.changed === true) {
        self.updateFields(droppedRow);

        for (var group in self.tableSettings) {
          if (self.tableSettings.hasOwnProperty(group)) {
            var rowSettings = self.rowSettings(group, droppedRow);
            if (rowSettings.relationship === 'group') {
              for (var n in self.rowObject.children) {
                if (self.rowObject.children.hasOwnProperty(n)) {
                  self.updateField(self.rowObject.children[n], group);
                }
              }
            }
          }
        }

        self.rowObject.markChanged();
        if (self.changed === false) {
          $(Drupal.theme('tableDragChangedWarning')).insertBefore(self.table).hide().fadeIn('slow');
          self.changed = true;
        }
      }

      if (self.indentEnabled) {
        self.rowObject.removeIndentClasses();
      }
      if (self.oldRowElement) {
        $(self.oldRowElement).removeClass('drag-previous');
      }
      $droppedRow.removeClass('drag').addClass('drag-previous');
      self.oldRowElement = droppedRow;
      self.onDrop();
      self.rowObject = null;
    }

    if (self.dragObject !== null) {
      self.dragObject = null;
      $('body').removeClass('drag');
      clearInterval(self.scrollInterval);
    }
  };

  Drupal.tableDrag.prototype.pointerCoords = function (event) {
    if (event.pageX || event.pageY) {
      return { x: event.pageX, y: event.pageY };
    }
    return {
      x: event.clientX + document.body.scrollLeft - document.body.clientLeft,
      y: event.clientY + document.body.scrollTop - document.body.clientTop
    };
  };

  Drupal.tableDrag.prototype.getPointerOffset = function (target, event) {
    var docPos = $(target).offset();
    var pointerPos = this.pointerCoords(event);
    return { x: pointerPos.x - docPos.left, y: pointerPos.y - docPos.top };
  };

  Drupal.tableDrag.prototype.findDropTargetRow = function (x, y) {
    var rows = $(this.table.tBodies[0].rows).not(':hidden');
    for (var n = 0; n < rows.length; n++) {
      var row = rows[n];
      var $row = $(row);
      var rowY = $row.offset().top;
      var rowHeight = void 0;

      if (row.offsetHeight === 0) {
        rowHeight = parseInt(row.firstChild.offsetHeight, 10) / 2;
      } else {
          rowHeight = parseInt(row.offsetHeight, 10) / 2;
        }

      if (y > rowY - rowHeight && y < rowY + rowHeight) {
        if (this.indentEnabled) {
          for (n in this.rowObject.group) {
            if (this.rowObject.group[n] === row) {
              return null;
            }
          }
        } else if (row === this.rowObject.element) {
            return null;
          }

        if (!this.rowObject.isValidSwap(row)) {
          return null;
        }

        while ($row.is(':hidden') && $row.prev('tr').is(':hidden')) {
          $row = $row.prev('tr:first-of-type');
          row = $row.get(0);
        }
        return row;
      }
    }
    return null;
  };

  Drupal.tableDrag.prototype.updateFields = function (changedRow) {
    for (var group in this.tableSettings) {
      if (this.tableSettings.hasOwnProperty(group)) {
        this.updateField(changedRow, group);
      }
    }
  };

  Drupal.tableDrag.prototype.updateField = function (changedRow, group) {
    var rowSettings = this.rowSettings(group, changedRow);
    var $changedRow = $(changedRow);
    var sourceRow = void 0;
    var $previousRow = void 0;
    var previousRow = void 0;
    var useSibling = void 0;

    if (rowSettings.relationship === 'self' || rowSettings.relationship === 'group') {
      sourceRow = changedRow;
    } else if (rowSettings.relationship === 'sibling') {
        $previousRow = $changedRow.prev('tr:first-of-type');
        previousRow = $previousRow.get(0);
        var $nextRow = $changedRow.next('tr:first-of-type');
        var nextRow = $nextRow.get(0);
        sourceRow = changedRow;
        if ($previousRow.is('.draggable') && $previousRow.find('.' + group).length) {
          if (this.indentEnabled) {
            if ($previousRow.find('.js-indentations').length === $changedRow.find('.js-indentations').length) {
              sourceRow = previousRow;
            }
          } else {
            sourceRow = previousRow;
          }
        } else if ($nextRow.is('.draggable') && $nextRow.find('.' + group).length) {
          if (this.indentEnabled) {
            if ($nextRow.find('.js-indentations').length === $changedRow.find('.js-indentations').length) {
              sourceRow = nextRow;
            }
          } else {
            sourceRow = nextRow;
          }
        }
      } else if (rowSettings.relationship === 'parent') {
          $previousRow = $changedRow.prev('tr');
          previousRow = $previousRow;
          while ($previousRow.length && $previousRow.find('.js-indentation').length >= this.rowObject.indents) {
            $previousRow = $previousRow.prev('tr');
            previousRow = $previousRow;
          }

          if ($previousRow.length) {
            sourceRow = $previousRow.get(0);
          } else {
              sourceRow = $(this.table).find('tr.draggable:first-of-type').get(0);
              if (sourceRow === this.rowObject.element) {
                sourceRow = $(this.rowObject.group[this.rowObject.group.length - 1]).next('tr.draggable').get(0);
              }
              useSibling = true;
            }
        }

    this.copyDragClasses(sourceRow, changedRow, group);
    rowSettings = this.rowSettings(group, changedRow);

    if (useSibling) {
      rowSettings.relationship = 'sibling';
      rowSettings.source = rowSettings.target;
    }

    var targetClass = '.' + rowSettings.target;
    var targetElement = $changedRow.find(targetClass).get(0);

    if (targetElement) {
      var sourceClass = '.' + rowSettings.source;
      var sourceElement = $(sourceClass, sourceRow).get(0);
      switch (rowSettings.action) {
        case 'depth':
          targetElement.value = $(sourceElement).closest('tr').find('.js-indentation').length;
          break;

        case 'match':
          targetElement.value = sourceElement.value;
          break;

        case 'order':
          {
            var siblings = this.rowObject.findSiblings(rowSettings);
            if ($(targetElement).is('select')) {
              var values = [];
              $(targetElement).find('option').each(function () {
                values.push(this.value);
              });
              var maxVal = values[values.length - 1];

              $(siblings).find(targetClass).each(function () {
                if (values.length > 0) {
                  this.value = values.shift();
                } else {
                  this.value = maxVal;
                }
              });
            } else {
              var weight = parseInt($(siblings[0]).find(targetClass).val(), 10) || 0;
              $(siblings).find(targetClass).each(function () {
                this.value = weight;
                weight++;
              });
            }
            break;
          }
      }
    }
  };

  Drupal.tableDrag.prototype.copyDragClasses = function (sourceRow, targetRow, group) {
    var sourceElement = $(sourceRow).find('.' + group);
    var targetElement = $(targetRow).find('.' + group);
    if (sourceElement.length && targetElement.length) {
      targetElement[0].className = sourceElement[0].className;
    }
  };

  Drupal.tableDrag.prototype.checkScroll = function (cursorY) {
    var de = document.documentElement;
    var b = document.body;

    var windowHeight = this.windowHeight = window.innerHeight || (de.clientHeight && de.clientWidth !== 0 ? de.clientHeight : b.offsetHeight);
    var scrollY = void 0;
    if (document.all) {
      scrollY = this.scrollY = !de.scrollTop ? b.scrollTop : de.scrollTop;
    } else {
      scrollY = this.scrollY = window.pageYOffset ? window.pageYOffset : window.scrollY;
    }
    var trigger = this.scrollSettings.trigger;
    var delta = 0;

    if (cursorY - scrollY > windowHeight - trigger) {
      delta = trigger / (windowHeight + scrollY - cursorY);
      delta = delta > 0 && delta < trigger ? delta : trigger;
      return delta * this.scrollSettings.amount;
    } else if (cursorY - scrollY < trigger) {
      delta = trigger / (cursorY - scrollY);
      delta = delta > 0 && delta < trigger ? delta : trigger;
      return -delta * this.scrollSettings.amount;
    }
  };

  Drupal.tableDrag.prototype.setScroll = function (scrollAmount) {
    var self = this;

    this.scrollInterval = setInterval(function () {
      self.checkScroll(self.currentPointerCoords.y);
      var aboveTable = self.scrollY > self.table.topY;
      var belowTable = self.scrollY + self.windowHeight < self.table.bottomY;
      if (scrollAmount > 0 && belowTable || scrollAmount < 0 && aboveTable) {
        window.scrollBy(0, scrollAmount);
      }
    }, this.scrollSettings.interval);
  };

  Drupal.tableDrag.prototype.restripeTable = function () {
    $(this.table).find('> tbody > tr.draggable, > tr.draggable').filter(':visible').filter(':odd').removeClass('odd').addClass('even').end().filter(':even').removeClass('even').addClass('odd');
  };

  Drupal.tableDrag.prototype.onDrag = function () {
    return null;
  };

  Drupal.tableDrag.prototype.onDrop = function () {
    return null;
  };

  Drupal.tableDrag.prototype.row = function (tableRow, method, indentEnabled, maxDepth, addClasses) {
    var $tableRow = $(tableRow);

    this.element = tableRow;
    this.method = method;
    this.group = [tableRow];
    this.groupDepth = $tableRow.find('.js-indentation').length;
    this.changed = false;
    this.table = $tableRow.closest('table')[0];
    this.indentEnabled = indentEnabled;
    this.maxDepth = maxDepth;

    this.direction = '';
    if (this.indentEnabled) {
      this.indents = $tableRow.find('.js-indentation').length;
      this.children = this.findChildren(addClasses);
      this.group = $.merge(this.group, this.children);

      for (var n = 0; n < this.group.length; n++) {
        this.groupDepth = Math.max($(this.group[n]).find('.js-indentation').length, this.groupDepth);
      }
    }
  };

  Drupal.tableDrag.prototype.row.prototype.findChildren = function (addClasses) {
    var parentIndentation = this.indents;
    var currentRow = $(this.element, this.table).next('tr.draggable');
    var rows = [];
    var child = 0;

    function rowIndentation(indentNum, el) {
      var self = $(el);
      if (child === 1 && indentNum === parentIndentation) {
        self.addClass('tree-child-first');
      }
      if (indentNum === parentIndentation) {
        self.addClass('tree-child');
      } else if (indentNum > parentIndentation) {
        self.addClass('tree-child-horizontal');
      }
    }

    while (currentRow.length) {
      if (currentRow.find('.js-indentation').length > parentIndentation) {
        child++;
        rows.push(currentRow[0]);
        if (addClasses) {
          currentRow.find('.js-indentation').each(rowIndentation);
        }
      } else {
        break;
      }
      currentRow = currentRow.next('tr.draggable');
    }
    if (addClasses && rows.length) {
      $(rows[rows.length - 1]).find('.js-indentation:nth-child(' + (parentIndentation + 1) + ')').addClass('tree-child-last');
    }
    return rows;
  };

  Drupal.tableDrag.prototype.row.prototype.isValidSwap = function (row) {
    var $row = $(row);
    if (this.indentEnabled) {
      var prevRow = void 0;
      var nextRow = void 0;
      if (this.direction === 'down') {
        prevRow = row;
        nextRow = $row.next('tr').get(0);
      } else {
        prevRow = $row.prev('tr').get(0);
        nextRow = row;
      }
      this.interval = this.validIndentInterval(prevRow, nextRow);

      if (this.interval.min > this.interval.max) {
        return false;
      }
    }

    if (this.table.tBodies[0].rows[0] === row && $row.is(':not(.draggable)')) {
      return false;
    }

    return true;
  };

  Drupal.tableDrag.prototype.row.prototype.swap = function (position, row) {
    this.group.forEach(function (row) {
      Drupal.detachBehaviors(row, drupalSettings, 'move');
    });
    $(row)[position](this.group);

    this.group.forEach(function (row) {
      Drupal.attachBehaviors(row, drupalSettings);
    });
    this.changed = true;
    this.onSwap(row);
  };

  Drupal.tableDrag.prototype.row.prototype.validIndentInterval = function (prevRow, nextRow) {
    var $prevRow = $(prevRow);
    var maxIndent = void 0;

    var minIndent = nextRow ? $(nextRow).find('.js-indentation').length : 0;

    if (!prevRow || $prevRow.is(':not(.draggable)') || $(this.element).is('.tabledrag-root')) {
      maxIndent = 0;
    } else {
      maxIndent = $prevRow.find('.js-indentation').length + ($prevRow.is('.tabledrag-leaf') ? 0 : 1);

      if (this.maxDepth) {
        maxIndent = Math.min(maxIndent, this.maxDepth - (this.groupDepth - this.indents));
      }
    }

    return { min: minIndent, max: maxIndent };
  };

  Drupal.tableDrag.prototype.row.prototype.indent = function (indentDiff) {
    var $group = $(this.group);

    if (!this.interval) {
      var prevRow = $(this.element).prev('tr').get(0);
      var nextRow = $group.eq(-1).next('tr').get(0);
      this.interval = this.validIndentInterval(prevRow, nextRow);
    }

    var indent = this.indents + indentDiff;
    indent = Math.max(indent, this.interval.min);
    indent = Math.min(indent, this.interval.max);
    indentDiff = indent - this.indents;

    for (var n = 1; n <= Math.abs(indentDiff); n++) {
      if (indentDiff < 0) {
        $group.find('.js-indentation:first-of-type').remove();
        this.indents--;
      } else {
        $group.find('td:first-of-type').prepend(Drupal.theme('tableDragIndentation'));
        this.indents++;
      }
    }
    if (indentDiff) {
      this.changed = true;
      this.groupDepth += indentDiff;
      this.onIndent();
    }

    return indentDiff;
  };

  Drupal.tableDrag.prototype.row.prototype.findSiblings = function (rowSettings) {
    var siblings = [];
    var directions = ['prev', 'next'];
    var rowIndentation = this.indents;
    var checkRowIndentation = void 0;
    for (var d = 0; d < directions.length; d++) {
      var checkRow = $(this.element)[directions[d]]();
      while (checkRow.length) {
        if (checkRow.find('.' + rowSettings.target)) {
          if (this.indentEnabled) {
            checkRowIndentation = checkRow.find('.js-indentation').length;
          }

          if (!this.indentEnabled || checkRowIndentation === rowIndentation) {
            siblings.push(checkRow[0]);
          } else if (checkRowIndentation < rowIndentation) {
            break;
          }
        } else {
          break;
        }
        checkRow = checkRow[directions[d]]();
      }

      if (directions[d] === 'prev') {
        siblings.reverse();
        siblings.push(this.element);
      }
    }
    return siblings;
  };

  Drupal.tableDrag.prototype.row.prototype.removeIndentClasses = function () {
    for (var n in this.children) {
      if (this.children.hasOwnProperty(n)) {
        $(this.children[n]).find('.js-indentation').removeClass('tree-child').removeClass('tree-child-first').removeClass('tree-child-last').removeClass('tree-child-horizontal');
      }
    }
  };

  Drupal.tableDrag.prototype.row.prototype.markChanged = function () {
    var marker = Drupal.theme('tableDragChangedMarker');
    var cell = $(this.element).find('td:first-of-type');
    if (cell.find('abbr.tabledrag-changed').length === 0) {
      cell.append(marker);
    }
  };

  Drupal.tableDrag.prototype.row.prototype.onIndent = function () {
    return null;
  };

  Drupal.tableDrag.prototype.row.prototype.onSwap = function (swappedRow) {
    return null;
  };

  $.extend(Drupal.theme, {
    tableDragChangedMarker: function tableDragChangedMarker() {
      return '<abbr class="warning tabledrag-changed" title="' + Drupal.t('Changed') + '">*</abbr>';
    },
    tableDragIndentation: function tableDragIndentation() {
      return '<div class="js-indentation indentation">&nbsp;</div>';
    },
    tableDragChangedWarning: function tableDragChangedWarning() {
      return '<div class="tabledrag-changed-warning messages messages--warning" role="alert">' + Drupal.theme('tableDragChangedMarker') + ' ' + Drupal.t('You have unsaved changes.') + '</div>';
    }
  });
})(jQuery, Drupal, drupalSettings);