50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
import { toRaw, shallowRef, watchEffect, watch } from 'vue';
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import { convertChildrenToData } from '../utils/legacyUtil';
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/**
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* Parse `children` to `options` if `options` is not provided.
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* Then flatten the `options`.
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*/
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export default function useOptions(options, children, fieldNames) {
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const mergedOptions = shallowRef();
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const valueOptions = shallowRef();
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const labelOptions = shallowRef();
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const tempMergedOptions = shallowRef([]);
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watch([options, children], () => {
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if (options.value) {
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tempMergedOptions.value = toRaw(options.value).slice();
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} else {
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tempMergedOptions.value = convertChildrenToData(children.value);
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}
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}, {
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immediate: true,
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deep: true
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});
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watchEffect(() => {
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const newOptions = tempMergedOptions.value;
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const newValueOptions = new Map();
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const newLabelOptions = new Map();
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const fieldNamesValue = fieldNames.value;
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function dig(optionList) {
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let isChildren = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
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// for loop to speed up collection speed
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for (let i = 0; i < optionList.length; i += 1) {
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const option = optionList[i];
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if (!option[fieldNamesValue.options] || isChildren) {
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newValueOptions.set(option[fieldNamesValue.value], option);
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newLabelOptions.set(option[fieldNamesValue.label], option);
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} else {
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dig(option[fieldNamesValue.options], true);
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}
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}
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}
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dig(newOptions);
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mergedOptions.value = newOptions;
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valueOptions.value = newValueOptions;
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labelOptions.value = newLabelOptions;
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});
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return {
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options: mergedOptions,
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valueOptions,
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labelOptions
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};
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} |