@coreui/vue/dist/cjs/components/chip-set/useChipSet.js

UI Components Library for Vue.js

'use strict';

var vue = require('vue');
var _const = require('../chip/const.js');
var isRTL = require('../../utils/isRTL.js');

const chipSetContextKey = Symbol('CChipSet');
/**
 * Shared chip-set engine for CChipSet and CChipInput — the Vue equivalent of the
 * vanilla `ChipInput extends ChipSet`. It owns selection coordination
 * (single/multiple, controlled-or-uncontrolled), roving focus, and the
 * focus-a-neighbor-after-removal behavior, and `provide`s a context that CChip
 * injects. Existence of the chips stays with the caller.
 */
const useChipSet = (options) => {
    const { config, selectionMode = () => 'multiple', selected = () => undefined, defaultSelected = [], restoreFocusOnRemove = true, onSelectionChange, onRemove, } = options;
    const rootRef = vue.ref();
    const internalSelected = vue.ref(defaultSelected);
    const selectedValues = vue.computed(() => {
        const controlled = selected();
        return controlled === undefined ? internalSelected.value : controlled;
    });
    const getFocusableChips = () => [
        ...(rootRef.value?.querySelectorAll(_const.SELECTOR_CHIP_FOCUSABLE) ?? []),
    ];
    const emitSelection = (next) => {
        if (selected() === undefined) {
            internalSelected.value = next;
        }
        onSelectionChange?.(next);
    };
    const toggleSelected = (value, next) => {
        const isSelected = selectedValues.value.includes(value);
        if (next === isSelected) {
            return;
        }
        if (next) {
            // Single selection mode keeps only the freshly selected chip.
            emitSelection(selectionMode() === 'single' ? [value] : [...selectedValues.value, value]);
            return;
        }
        emitSelection(selectedValues.value.filter((item) => item !== value));
    };
    const clearSelection = () => {
        if (selectedValues.value.length > 0) {
            emitSelection([]);
        }
    };
    const removeChip = (value) => {
        if (restoreFocusOnRemove) {
            const chips = getFocusableChips();
            const index = chips.findIndex((chip) => chip.dataset.coreuiChipValue === value);
            // Prefer the next chip, fall back to the previous one at the end.
            const neighbor = chips[index + 1] ?? chips[index - 1] ?? null;
            const neighborValue = neighbor?.dataset.coreuiChipValue ?? null;
            if (neighborValue !== null) {
                vue.nextTick(() => {
                    rootRef.value
                        ?.querySelector(`[data-coreui-chip-value="${neighborValue}"]`)
                        ?.focus();
                });
            }
        }
        emitSelection(selectedValues.value.filter((item) => item !== value));
        onRemove?.(value);
    };
    // Roving focus: arrow keys move between chips and Home/End jump to the edges,
    // with no cycling. Returns true when the key was handled.
    const handleKeydown = (event) => {
        const chip = event.target.closest(_const.SELECTOR_CHIP_FOCUSABLE);
        if (!chip) {
            return false;
        }
        const chips = getFocusableChips();
        const index = chips.indexOf(chip);
        // In RTL the visual direction is mirrored, so left/right swap.
        const rtl = isRTL.default(rootRef.value);
        switch (event.key) {
            case 'ArrowLeft': {
                event.preventDefault();
                chips[rtl ? index + 1 : index - 1]?.focus();
                return true;
            }
            case 'ArrowRight': {
                event.preventDefault();
                chips[rtl ? index - 1 : index + 1]?.focus();
                return true;
            }
            case 'Home': {
                event.preventDefault();
                chips[0]?.focus();
                return true;
            }
            case 'End': {
                event.preventDefault();
                chips[chips.length - 1]?.focus();
                return true;
            }
            default: {
                return false;
            }
        }
    };
    vue.provide(chipSetContextKey, {
        config,
        isSelected: (value) => selectedValues.value.includes(value),
        toggleSelected: (value, next) => toggleSelected(value, next),
        removeChip: (value) => removeChip(value),
    });
    return { rootRef, selectedValues, clearSelection, getFocusableChips, handleKeydown };
};

exports.chipSetContextKey = chipSetContextKey;
exports.useChipSet = useChipSet;
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