<template>
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<nut-input type="number" :formatter="formatter" formatTrigger="onBlur" v-model="innerModelValue">
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<template #right>
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<slot name="right"></slot>
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</template>
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</nut-input>
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</template>
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<script setup lang="ts">
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import { computed } from 'vue';
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defineOptions({
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name: 'NumberInput',
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});
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type Props = {
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min?: number;
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max?: number;
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precision?: number;
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modelValue?: number | string;
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};
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const props = withDefaults(defineProps<Props>(), {
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max: Math.pow(2, 53) - 1,
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});
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const emit = defineEmits<{
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(e: 'update:modelValue', val: string | number): void;
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}>();
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const innerModelValue = computed({
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get() {
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return props.modelValue + '';
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},
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set(val) {
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emit('update:modelValue', val);
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},
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});
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function formatter(value: string): string {
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const newVal = value !== '' ? Number.parseFloat(value) : '';
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if (Number.isNaN(newVal)) {
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return '';
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}
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if (newVal && newVal > props.max) {
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return `${toPrecision(props.max)}`;
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}
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if (props.min !== undefined && !!`${newVal}` && (newVal as number) < props.min) {
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return `${toPrecision(props.min)}`;
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}
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return newVal !== '' ? `${toPrecision(newVal)}` : newVal;
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}
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function toPrecision(num: number) {
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if (props.precision) {
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if (props.precision === 0) return Math.round(num);
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let snum = String(num);
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const pointPos = snum.indexOf('.');
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if (pointPos === -1) return num;
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const nums = snum.replace('.', '').split('');
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const datum = nums[pointPos + props.precision];
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if (!datum) return num;
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const length = snum.length;
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if (snum.charAt(length - 1) === '5') {
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snum = `${snum.slice(0, Math.max(0, length - 1))}6`;
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}
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return Number(snum).toFixed(props.precision);
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}
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return String(num);
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}
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</script>
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