private onCellKeydown()

in src/draft-components/grid/grid.tsx [296:336]

• 40 lines of code
• 14 McCabe index (conditional complexity)

  private onCellKeydown(event: KeyboardEvent) {
    const { pageLength } = this;
    const maxCellIndex = this.rowSelection === RowSelectionPattern.Checkbox ? this.columns.length : this.columns.length - 1;
    let [colIndex, rowIndex] = this.activeCell;
    switch(event.key) {
      case 'ArrowUp':
        rowIndex = Math.max(0, rowIndex - 1);
        break;
      case 'ArrowDown':
        rowIndex = Math.min(this.cells.length - 1, rowIndex + 1);
        break;
      case 'ArrowLeft':
        colIndex = Math.max(0, colIndex - 1);
        break;
      case 'ArrowRight':
        colIndex = Math.min(maxCellIndex, colIndex + 1);
        break;
      case 'Home':
        colIndex = 0;
        break;
      case 'End':
        colIndex = maxCellIndex;
        break;
      case 'Enter':
      case ' ':
        if (this.simpleEditable) return;
        event.preventDefault();
        this.updateEditing(true, true);
        break;
      case 'PageUp':
        rowIndex = Math.max(0, rowIndex - pageLength);
        break;
      case 'PageDown':
        rowIndex = Math.min(this.cells.length - 1, rowIndex + pageLength);
        break;
    }

    if (this.updateActiveCell(colIndex, rowIndex)) {
      event.preventDefault();
    }
  }