lucid-ui/dist/components/DropMenu/DropMenu.reducers.js

A UI component library from AppNexus.

import _ from 'lodash';
export function onExpand(state) {
    const { selectedIndices } = state;
    const focusedIndex = _.last(selectedIndices);
    return {
        ...state,
        isExpanded: true,
        focusedIndex: _.isNil(focusedIndex) ? null : focusedIndex,
    };
}
export function onCollapse(state) {
    return {
        ...state,
        isExpanded: false,
    };
}
export function onSelect(state, optionIndex) {
    return {
        ...state,
        selectedIndices: [optionIndex],
        isExpanded: false,
    };
}
export function onFocusNext(state) {
    const { focusedIndex } = state;
    let nextFocusedIndex = focusedIndex;
    if (_.isNull(focusedIndex)) {
        nextFocusedIndex = 0;
    }
    else if (_.isNumber(focusedIndex)) {
        nextFocusedIndex = focusedIndex + 1;
    }
    return {
        ...state,
        focusedIndex: nextFocusedIndex,
    };
}
export function onFocusPrev(state) {
    const { focusedIndex } = state;
    let nextFocusedIndex = focusedIndex;
    if (_.isNull(focusedIndex) || focusedIndex === 0) {
        nextFocusedIndex = null;
    }
    else if (_.isNumber(focusedIndex)) {
        nextFocusedIndex = focusedIndex - 1;
    }
    return {
        ...state,
        focusedIndex: nextFocusedIndex,
    };
}
export function onFocusOption(state, optionIndex) {
    return {
        ...state,
        focusedIndex: optionIndex,
    };
}