# all files / src/js/base/editing/ Table.js

89.96% Statements 251/279
78.48% Branches 124/158
95.24% Functions 20/21
91.24% Lines 250/274

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     import $ from 'jquery';
    import dom from '../core/dom';
    import range from '../core/range';
    import lists from '../core/lists';

    /**
     * @class Create a virtual table to create what actions to do in change.
     * @param {object} startPoint Cell selected to apply change.
     * @param {enum} where  Where change will be applied Row or Col. Use enum: TableResultAction.where
     * @param {enum} action Action to be applied. Use enum: TableResultAction.requestAction
     * @param {object} domTable Dom element of table to make changes.
     */
    const TableResultAction = function(startPoint, where, action, domTable) {
      const _startPoint = { 'colPos': 0, 'rowPos': 0 };
      const _virtualTable = [];
      const _actionCellList = [];

      /// ///////////////////////////////////////////
      // Private functions
      /// ///////////////////////////////////////////

      /**
       * Set the startPoint of action.
       */
      function setStartPoint() {
        Iif (!startPoint || !startPoint.tagName || (startPoint.tagName.toLowerCase() !== 'td' && startPoint.tagName.toLowerCase() !== 'th')) {
          console.error('Impossible to identify start Cell point.', startPoint);
          return;
        }
        _startPoint.colPos = startPoint.cellIndex;
        Iif (!startPoint.parentElement || !startPoint.parentElement.tagName || startPoint.parentElement.tagName.toLowerCase() !== 'tr') {
          console.error('Impossible to identify start Row point.', startPoint);
          return;
        }
        _startPoint.rowPos = startPoint.parentElement.rowIndex;
      }

      /**
       * Define virtual table position info object.
       *
       * @param {int} rowIndex Index position in line of virtual table.
       * @param {int} cellIndex Index position in column of virtual table.
       * @param {object} baseRow Row affected by this position.
       * @param {object} baseCell Cell affected by this position.
       * @param {bool} isSpan Inform if it is an span cell/row.
       */
      function setVirtualTablePosition(rowIndex, cellIndex, baseRow, baseCell, isRowSpan, isColSpan, isVirtualCell) {
        const objPosition = {
          'baseRow': baseRow,
          'baseCell': baseCell,
          'isRowSpan': isRowSpan,
          'isColSpan': isColSpan,
          'isVirtual': isVirtualCell
        };
        if (!_virtualTable[rowIndex]) {
          _virtualTable[rowIndex] = [];
        }
        _virtualTable[rowIndex][cellIndex] = objPosition;
      }

      /**
       * Create action cell object.
       *
       * @param {object} virtualTableCellObj Object of specific position on virtual table.
       * @param {enum} resultAction Action to be applied in that item.
       */
      function getActionCell(virtualTableCellObj, resultAction, virtualRowPosition, virtualColPosition) {
        return {
          'baseCell': virtualTableCellObj.baseCell,
          'action': resultAction,
          'virtualTable': {
            'rowIndex': virtualRowPosition,
            'cellIndex': virtualColPosition
          }
        };
      }

      /**
       * Recover free index of row to append Cell.
       *
       * @param {int} rowIndex Index of row to find free space.
       * @param {int} cellIndex Index of cell to find free space in table.
       */
      function recoverCellIndex(rowIndex, cellIndex) {
        if (!_virtualTable[rowIndex]) {
          return cellIndex;
        }
        if (!_virtualTable[rowIndex][cellIndex]) {
          return cellIndex;
        }

        let newCellIndex = cellIndex;
        while (_virtualTable[rowIndex][newCellIndex]) {
          newCellIndex++;
          if (!_virtualTable[rowIndex][newCellIndex]) {
            return newCellIndex;
          }
        }
      }

      /**
       * Recover info about row and cell and add information to virtual table.
       *
       * @param {object} row Row to recover information.
       * @param {object} cell Cell to recover information.
       */
      function addCellInfoToVirtual(row, cell) {
        const cellIndex = recoverCellIndex(row.rowIndex, cell.cellIndex);
        const cellHasColspan = (cell.colSpan > 1);
        const cellHasRowspan = (cell.rowSpan > 1);
        const isThisSelectedCell = (row.rowIndex === _startPoint.rowPos && cell.cellIndex === _startPoint.colPos);
        setVirtualTablePosition(row.rowIndex, cellIndex, row, cell, cellHasRowspan, cellHasColspan, false);

        // Add span rows to virtual Table.
        const rowspanNumber = cell.attributes.rowSpan ? parseInt(cell.attributes.rowSpan.value, 10) : 0;
        if (rowspanNumber > 1) {
          for (let rp = 1; rp < rowspanNumber; rp++) {
            const rowspanIndex = row.rowIndex + rp;
            adjustStartPoint(rowspanIndex, cellIndex, cell, isThisSelectedCell);
            setVirtualTablePosition(rowspanIndex, cellIndex, row, cell, true, cellHasColspan, true);
          }
        }

        // Add span cols to virtual table.
        const colspanNumber = cell.attributes.colSpan ? parseInt(cell.attributes.colSpan.value, 10) : 0;
        if (colspanNumber > 1) {
          for (let cp = 1; cp < colspanNumber; cp++) {
            const cellspanIndex = recoverCellIndex(row.rowIndex, (cellIndex + cp));
            adjustStartPoint(row.rowIndex, cellspanIndex, cell, isThisSelectedCell);
            setVirtualTablePosition(row.rowIndex, cellspanIndex, row, cell, cellHasRowspan, true, true);
          }
        }
      }

      /**
       * Process validation and adjust of start point if needed
       *
       * @param {int} rowIndex
       * @param {int} cellIndex
       * @param {object} cell
       * @param {bool} isSelectedCell
       */
      function adjustStartPoint(rowIndex, cellIndex, cell, isSelectedCell) {
        if (rowIndex === _startPoint.rowPos && _startPoint.colPos >= cell.cellIndex && cell.cellIndex <= cellIndex && !isSelectedCell) {
          _startPoint.colPos++;
        }
      }

      /**
       * Create virtual table of cells with all cells, including span cells.
       */
      function createVirtualTable() {
        const rows = domTable.rows;
        for (let rowIndex = 0; rowIndex < rows.length; rowIndex++) {
          const cells = rows[rowIndex].cells;
          for (let cellIndex = 0; cellIndex < cells.length; cellIndex++) {
            addCellInfoToVirtual(rows[rowIndex], cells[cellIndex]);
          }
        }
      }

      /**
       * Get action to be applied on the cell.
       *
       * @param {object} cell virtual table cell to apply action
       */
      function getDeleteResultActionToCell(cell) {
        switch (where) {
          case TableResultAction.where.Column:
            if (cell.isColSpan) {
              return TableResultAction.resultAction.SubtractSpanCount;
            }
            break;
          case TableResultAction.where.Row:
            if (!cell.isVirtual && cell.isRowSpan) {
              return TableResultAction.resultAction.AddCell;
            } else if (cell.isRowSpan) {
              return TableResultAction.resultAction.SubtractSpanCount;
            }
            break;
        }
        return TableResultAction.resultAction.RemoveCell;
      }

      /**
       * Get action to be applied on the cell.
       *
       * @param {object} cell virtual table cell to apply action
       */
      function getAddResultActionToCell(cell) {
        switch (where) {
          case TableResultAction.where.Column:
            if (cell.isColSpan) {
              return TableResultAction.resultAction.SumSpanCount;
            } else if (cell.isRowSpan && cell.isVirtual) {
              return TableResultAction.resultAction.Ignore;
            }
            break;
          case TableResultAction.where.Row:
            if (cell.isRowSpan) {
              return TableResultAction.resultAction.SumSpanCount;
            } else if (cell.isColSpan && cell.isVirtual) {
              return TableResultAction.resultAction.Ignore;
            }
            break;
        }
        return TableResultAction.resultAction.AddCell;
      }

      function init() {
        setStartPoint();
        createVirtualTable();
      }

      /// ///////////////////////////////////////////
      // Public functions
      /// ///////////////////////////////////////////

      /**
       * Recover array os what to do in table.
       */
      this.getActionList = function() {
        const fixedRow = (where === TableResultAction.where.Row) ? _startPoint.rowPos : -1;
        const fixedCol = (where === TableResultAction.where.Column) ? _startPoint.colPos : -1;

        let actualPosition = 0;
        let canContinue = true;
        while (canContinue) {
          const rowPosition = (fixedRow >= 0) ? fixedRow : actualPosition;
          const colPosition = (fixedCol >= 0) ? fixedCol : actualPosition;
          const row = _virtualTable[rowPosition];
          if (!row) {
            canContinue = false;
            return _actionCellList;
          }
          const cell = row[colPosition];
          if (!cell) {
            canContinue = false;
            return _actionCellList;
          }

          // Define action to be applied in this cell
          let resultAction = TableResultAction.resultAction.Ignore;
          switch (action) {
            case TableResultAction.requestAction.Add:
              resultAction = getAddResultActionToCell(cell);
              break;
            case TableResultAction.requestAction.Delete:
              resultAction = getDeleteResultActionToCell(cell);
              break;
          }
          _actionCellList.push(getActionCell(cell, resultAction, rowPosition, colPosition));
          actualPosition++;
        }

        return _actionCellList;
      };

      init();
    };
    /**
    *
    * Where action occours enum.
    */
    TableResultAction.where = { 'Row': 0, 'Column': 1 };
    /**
    *
    * Requested action to apply enum.
    */
    TableResultAction.requestAction = { 'Add': 0, 'Delete': 1 };
    /**
    *
    * Result action to be executed enum.
    */
    TableResultAction.resultAction = { 'Ignore': 0, 'SubtractSpanCount': 1, 'RemoveCell': 2, 'AddCell': 3, 'SumSpanCount': 4 };

    /**
     *
     * @class editing.Table
     *
     * Table
     *
     */
    export default class Table {
      /**
       * handle tab key
       *
       * @param {WrappedRange} rng
       * @param {Boolean} isShift
       */
      tab(rng, isShift) {
        const cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
        const table = dom.ancestor(cell, dom.isTable);
        const cells = dom.listDescendant(table, dom.isCell);

        const nextCell = lists[isShift ? 'prev' : 'next'](cells, cell);
        if (nextCell) {
          range.create(nextCell, 0).select();
        }
      }

      /**
       * Add a new row
       *
       * @param {WrappedRange} rng
       * @param {String} position (top/bottom)
       * @return {Node}
       */
      addRow(rng, position) {
        const cell = dom.ancestor(rng.commonAncestor(), dom.isCell);

        const currentTr = $(cell).closest('tr');
        const trAttributes = this.recoverAttributes(currentTr);
        const html = $('<tr' + trAttributes + '></tr>');

        const vTable = new TableResultAction(cell, TableResultAction.where.Row,
          TableResultAction.requestAction.Add, $(currentTr).closest('table')[0]);
        const actions = vTable.getActionList();

        for (let idCell = 0; idCell < actions.length; idCell++) {
          const currentCell = actions[idCell];
          const tdAttributes = this.recoverAttributes(currentCell.baseCell);
          switch (currentCell.action) {
            case TableResultAction.resultAction.AddCell:
              html.append('<td' + tdAttributes + '>' + dom.blank + '</td>');
              break;
            case TableResultAction.resultAction.SumSpanCount:
              if (position === 'top') {
                const baseCellTr = currentCell.baseCell.parent;
                const isTopFromRowSpan = (!baseCellTr ? 0 : currentCell.baseCell.closest('tr').rowIndex) <= currentTr[0].rowIndex;
                Eif (isTopFromRowSpan) {
                  const newTd = $('<div></div>').append($('<td' + tdAttributes + '>' + dom.blank + '</td>').removeAttr('rowspan')).html();
                  html.append(newTd);
                  break;
                }
              }
              let rowspanNumber = parseInt(currentCell.baseCell.rowSpan, 10);
              rowspanNumber++;
              currentCell.baseCell.setAttribute('rowSpan', rowspanNumber);
              break;
          }
        }

        if (position === 'top') {
          currentTr.before(html);
        } else {
          const cellHasRowspan = (cell.rowSpan > 1);
          if (cellHasRowspan) {
            const lastTrIndex = currentTr[0].rowIndex + (cell.rowSpan - 2);
            $($(currentTr).parent().find('tr')[lastTrIndex]).after($(html));
            return;
          }
          currentTr.after(html);
        }
      }

      /**
       * Add a new col
       *
       * @param {WrappedRange} rng
       * @param {String} position (left/right)
       * @return {Node}
       */
      addCol(rng, position) {
        const cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
        const row = $(cell).closest('tr');
        const rowsGroup = $(row).siblings();
        rowsGroup.push(row);

        const vTable = new TableResultAction(cell, TableResultAction.where.Column,
          TableResultAction.requestAction.Add, $(row).closest('table')[0]);
        const actions = vTable.getActionList();

        for (let actionIndex = 0; actionIndex < actions.length; actionIndex++) {
          const currentCell = actions[actionIndex];
          const tdAttributes = this.recoverAttributes(currentCell.baseCell);
          switch (currentCell.action) {
            case TableResultAction.resultAction.AddCell:
              if (position === 'right') {
                $(currentCell.baseCell).after('<td' + tdAttributes + '>' + dom.blank + '</td>');
              } else {
                $(currentCell.baseCell).before('<td' + tdAttributes + '>' + dom.blank + '</td>');
              }
              break;
            case TableResultAction.resultAction.SumSpanCount:
              Eif (position === 'right') {
                let colspanNumber = parseInt(currentCell.baseCell.colSpan, 10);
                colspanNumber++;
                currentCell.baseCell.setAttribute('colSpan', colspanNumber);
              } else {
                $(currentCell.baseCell).before('<td' + tdAttributes + '>' + dom.blank + '</td>');
              }
              break;
          }
        }
      }

      /*
      * Copy attributes from element.
      *
      * @param {object} Element to recover attributes.
      * @return {string} Copied string elements.
      */
      recoverAttributes(el) {
        let resultStr = '';

        Iif (!el) {
          return resultStr;
        }

        const attrList = el.attributes || [];

        for (let i = 0; i < attrList.length; i++) {
          if (attrList[i].name.toLowerCase() === 'id') {
            continue;
          }

          Eif (attrList[i].specified) {
            resultStr += ' ' + attrList[i].name + '=\'' + attrList[i].value + '\'';
          }
        }

        return resultStr;
      }

      /**
       * Delete current row
       *
       * @param {WrappedRange} rng
       * @return {Node}
       */
      deleteRow(rng) {
        const cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
        const row = $(cell).closest('tr');
        const cellPos = row.children('td, th').index($(cell));
        const rowPos = row[0].rowIndex;

        const vTable = new TableResultAction(cell, TableResultAction.where.Row,
          TableResultAction.requestAction.Delete, $(row).closest('table')[0]);
        const actions = vTable.getActionList();

        for (let actionIndex = 0; actionIndex < actions.length; actionIndex++) {
          Iif (!actions[actionIndex]) {
            continue;
          }

          const baseCell = actions[actionIndex].baseCell;
          const virtualPosition = actions[actionIndex].virtualTable;
          const hasRowspan = (baseCell.rowSpan && baseCell.rowSpan > 1);
          let rowspanNumber = (hasRowspan) ? parseInt(baseCell.rowSpan, 10) : 0;
          switch (actions[actionIndex].action) {
            case TableResultAction.resultAction.Ignore:
              continue;
            case TableResultAction.resultAction.AddCell:
              const nextRow = row.next('tr')[0];
              Iif (!nextRow) { continue; }
              const cloneRow = row[0].cells[cellPos];
              Eif (hasRowspan) {
                Iif (rowspanNumber > 2) {
                  rowspanNumber--;
                  nextRow.insertBefore(cloneRow, nextRow.cells[cellPos]);
                  nextRow.cells[cellPos].setAttribute('rowSpan', rowspanNumber);
                  nextRow.cells[cellPos].innerHTML = '';
                } else Eif (rowspanNumber === 2) {
                  nextRow.insertBefore(cloneRow, nextRow.cells[cellPos]);
                  nextRow.cells[cellPos].removeAttribute('rowSpan');
                  nextRow.cells[cellPos].innerHTML = '';
                }
              }
              continue;
            case TableResultAction.resultAction.SubtractSpanCount:
              Eif (hasRowspan) {
                Eif (rowspanNumber > 2) {
                  rowspanNumber--;
                  baseCell.setAttribute('rowSpan', rowspanNumber);
                  Iif (virtualPosition.rowIndex !== rowPos && baseCell.cellIndex === cellPos) { baseCell.innerHTML = ''; }
                } else if (rowspanNumber === 2) {
                  baseCell.removeAttribute('rowSpan');
                  if (virtualPosition.rowIndex !== rowPos && baseCell.cellIndex === cellPos) { baseCell.innerHTML = ''; }
                }
              }
              continue;
            case TableResultAction.resultAction.RemoveCell:
              // Do not need remove cell because row will be deleted.
              continue;
          }
        }
        row.remove();
      }

      /**
       * Delete current col
       *
       * @param {WrappedRange} rng
       * @return {Node}
       */
      deleteCol(rng) {
        const cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
        const row = $(cell).closest('tr');
        const cellPos = row.children('td, th').index($(cell));

        const vTable = new TableResultAction(cell, TableResultAction.where.Column,
          TableResultAction.requestAction.Delete, $(row).closest('table')[0]);
        const actions = vTable.getActionList();

        for (let actionIndex = 0; actionIndex < actions.length; actionIndex++) {
          Iif (!actions[actionIndex]) {
            continue;
          }
          switch (actions[actionIndex].action) {
            case TableResultAction.resultAction.Ignore:
              continue;
            case TableResultAction.resultAction.SubtractSpanCount:
              const baseCell = actions[actionIndex].baseCell;
              const hasColspan = (baseCell.colSpan && baseCell.colSpan > 1);
              Eif (hasColspan) {
                let colspanNumber = (baseCell.colSpan) ? parseInt(baseCell.colSpan, 10) : 0;
                if (colspanNumber > 2) {
                  colspanNumber--;
                  baseCell.setAttribute('colSpan', colspanNumber);
                  Iif (baseCell.cellIndex === cellPos) { baseCell.innerHTML = ''; }
                } else Eif (colspanNumber === 2) {
                  baseCell.removeAttribute('colSpan');
                  if (baseCell.cellIndex === cellPos) { baseCell.innerHTML = ''; }
                }
              }
              continue;
            case TableResultAction.resultAction.RemoveCell:
              dom.remove(actions[actionIndex].baseCell, true);
              continue;
          }
        }
      }

      /**
       * create empty table element
       *
       * @param {Number} rowCount
       * @param {Number} colCount
       * @return {Node}
       */
      createTable(colCount, rowCount, options) {
        const tds = [];
        let tdHTML;
        for (let idxCol = 0; idxCol < colCount; idxCol++) {
          tds.push('<td>' + dom.blank + '</td>');
        }
        tdHTML = tds.join('');

        const trs = [];
        let trHTML;
        for (let idxRow = 0; idxRow < rowCount; idxRow++) {
          trs.push('<tr>' + tdHTML + '</tr>');
        }
        trHTML = trs.join('');
        const $table = $('<table>' + trHTML + '</table>');
        if (options && options.tableClassName) {
          $table.addClass(options.tableClassName);
        }

        return $table[0];
      }

      /**
       * Delete current table
       *
       * @param {WrappedRange} rng
       * @return {Node}
       */
      deleteTable(rng) {
        const cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
        $(cell).closest('table').remove();
      }
    }