Function selectRange

web/src/js/ducks/flows/index.ts:378–397

(flow: Flow)

/** Select a range of flows with shift + click. */
export function selectRange(flow: Flow) {
    return (dispatch: AppDispatch, getState: () => RootState) => {
        const { flows } = getState();
        const prev = flows.selected[flows.selected.length - 1];

        const thisIndex = flows._viewIndex.get(flow.id);
        const prevIndex = flows._viewIndex.get(prev?.id);
        if (thisIndex === undefined || prevIndex === undefined) {
            return dispatch(select([flow]));
        }
        let newSelection: Flow[];
        if (thisIndex <= prevIndex) {
            newSelection = flows.view.slice(thisIndex, prevIndex + 1);
        } else {
            newSelection = flows.view.slice(prevIndex + 1, thisIndex + 1);
            newSelection.push(prev); // Keep this at the end if the user shift-clicks again.
        }
        return dispatch(select(newSelection));
    };
}