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| <!-- components/Form/Form.vue -->
<template>
<form :class="formClasses" @submit="handleSubmit">
<slot :validate="validate" :reset="reset" :errors="errors" />
</form>
</template>
<script setup lang="ts">
import { reactive, provide, computed } from 'vue'
import { FormValidator } from './validation'
import type { ValidationRule } from './validation'
export interface FormProps {
/**
* 表单布局
*/
layout?: 'vertical' | 'horizontal' | 'inline'
/**
* 标签宽度（水平布局时）
*/
labelWidth?: string
/**
* 表单尺寸
*/
size?: 'sm' | 'md' | 'lg'
/**
* 是否禁用整个表单
*/
disabled?: boolean
}
export interface FormEmits {
submit: [data: Record<string, any>, isValid: boolean]
'field-change': [name: string, value: any]
'validation-change': [errors: Record<string, string>]
}
defineOptions({
name: 'UiForm'
})
const props = withDefaults(defineProps<FormProps>(), {
layout: 'vertical',
size: 'md',
disabled: false
})
const emit = defineEmits<FormEmits>()
// 表单验证器
const validator = new FormValidator()
// 表单数据
const formData = reactive<Record<string, any>>({})
// 错误信息
const errors = reactive<Record<string, string>>({})
// 计算样式类
const formClasses = computed(() => [
'form',
`form--${props.layout}`,
`form--${props.size}`,
{
'form--disabled': props.disabled
}
])
// 注册字段
const registerField = (name: string, rules: ValidationRule[], initialValue: any = '') => {
validator.addField(name, rules, initialValue)
formData[name] = initialValue
}
// 注销字段
const unregisterField = (name: string) => {
validator.removeField(name)
delete formData[name]
delete errors[name]
}
// 设置字段值
const setFieldValue = (name: string, value: any) => {
formData[name] = value
validator.setValue(name, value)
// 验证字段
const isValid = validator.validateField(name, formData)
const error = validator.getFieldError(name)
if (error) {
errors[name] = error
} else {
delete errors[name]
}
emit('field-change', name, value)
emit('validation-change', { ...errors })
}
// 验证表单
const validate = (): boolean => {
const isValid = validator.validateAll(formData)
const newErrors = validator.getErrors()
// 清空现有错误
Object.keys(errors).forEach(key => {
delete errors[key]
})
// 设置新错误
Object.assign(errors, newErrors)
emit('validation-change', { ...errors })
return isValid
}
// 重置表单
const reset = () => {
validator.reset()
// 清空数据和错误
Object.keys(formData).forEach(key => {
formData[key] = ''
})
Object.keys(errors).forEach(key => {
delete errors[key]
})
emit('validation-change', {})
}
// 提交表单
const handleSubmit = (event: Event) => {
event.preventDefault()
const isValid = validate()
emit('submit', { ...formData }, isValid)
}
// 提供给子组件的上下文
provide('form', {
layout: props.layout,
size: props.size,
disabled: props.disabled,
labelWidth: props.labelWidth,
registerField,
unregisterField,
setFieldValue,
getFieldValue: (name: string) => formData[name],
getFieldError: (name: string) => errors[name]
})
// 暴露方法
defineExpose({
validate,
reset,
setFieldValue,
getFormData: () => ({ ...formData }),
getErrors: () => ({ ...errors })
})
</script>
<style lang="scss" scoped>
.form {
&--vertical {
.form-item {
margin-bottom: var(--spacing-4);
}
}
&--horizontal {
.form-item {
display: flex;
align-items: flex-start;
margin-bottom: var(--spacing-4);
.form-item-label {
flex-shrink: 0;
margin-bottom: 0;
margin-right: var(--spacing-3);
padding-top: var(--spacing-2);
}
.form-item-content {
flex: 1;
}
}
}
&--inline {
display: flex;
flex-wrap: wrap;
gap: var(--spacing-4);
.form-item {
margin-bottom: 0;
}
}
&--disabled {
pointer-events: none;
opacity: 0.6;
}
}
</style>
|
