handsontable/shortcutContexts/commands/extendCellsSelection/toMostLeft.mjs

Handsontable is a JavaScript Data Grid available for React, Angular and Vue.

export const command = {
  name: 'extendCellsSelectionToMostLeft',
  callback(hot) {
    const {
      selection,
      columnIndexMapper
    } = hot;
    const {
      highlight,
      from,
      to
    } = hot.getSelectedRangeActive();
    const isFocusHighlightedByHeader = highlight.isHeader() && selection.isSelectedByColumnHeader();
    if (highlight.isCell() || isFocusHighlightedByHeader) {
      const column = columnIndexMapper.getNearestNotHiddenIndex(...(hot.isRtl() ? [hot.countCols() - 1, -1] : [0, 1]));
      const newFrom = from.clone();
      newFrom.col = highlight.col;
      selection.markSource('keyboard');
      selection.setRangeStart(newFrom, undefined, false, highlight.clone());

      // Restore the column highlight by header flag after setting up a new selection.
      if (isFocusHighlightedByHeader) {
        selection.selectedByColumnHeader.add(selection.getLayerLevel());
      }
      selection.setRangeEnd(hot._createCellCoords(to.row, column));
      selection.markEndSource();
    }
  }
};