2020-03-31 13:47:59 +08:00

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JavaScript
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import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import Grid from '../grid';
import RGrid from '../responsive-grid';
import { obj } from '../util';
import Error from './error';
import { getFieldInitCfg } from './enhance';
const { Row, Col } = Grid;
const { Cell } = RGrid;
const { isNil } = obj;
/** Form.Item
* @description 手动传递了 wrapCol labelCol 会使用 Grid 辅助布局; labelAlign='top' 会强制禁用 Grid
* @order 1
*/
export default class Item extends React.Component {
static propTypes = {
/**
* 样式前缀
*/
prefix: PropTypes.string,
rtl: PropTypes.bool,
/**
* label 标签的文本
*/
label: PropTypes.node,
/**
* label 标签布局,通 `<Col>` 组件,设置 span offset 值,如 {span: 8, offset: 16},该项仅在垂直表单有效
*/
labelCol: PropTypes.object,
/**
* 需要为输入控件设置布局样式时,使用该属性,用法同 labelCol
*/
wrapperCol: PropTypes.object,
/**
* 自定义提示信息,如不设置,则会根据校验规则自动生成.
*/
help: PropTypes.node,
/**
* 额外的提示信息,和 help 类似,当需要错误信息和提示文案同时出现时,可以使用这个。 位于错误信息后面
*/
extra: PropTypes.node,
/**
* 校验状态,如不设置,则会根据校验规则自动生成
* @enumdesc 失败, 成功, 校验中, 警告
*/
validateState: PropTypes.oneOf([
'error',
'success',
'loading',
'warning',
]),
/**
* 配合 validateState 属性使用,是否展示 success/loading 的校验状态图标, 目前只有Input支持
*/
hasFeedback: PropTypes.bool, //TODO: hasFeedback => validateStatus=[error,success,loading]
/**
* 自定义内联样式
*/
style: PropTypes.object,
id: PropTypes.string,
/**
* node 或者 function(values)
*/
children: PropTypes.oneOfType([PropTypes.node, PropTypes.func]),
/**
* 单个 Item 的 size 自定义,优先级高于 Form 的 size, 并且当组件与 Item 一起使用时,组件自身设置 size 属性无效。
*/
size: PropTypes.oneOf(['large', 'small', 'medium']),
/**
* 单个 Item 中表单类组件宽度是否是100%
*/
fullWidth: PropTypes.bool,
/**
* 标签的位置
* @enumdesc 上, 左, 内
*/
labelAlign: PropTypes.oneOf(['top', 'left', 'inset']),
/**
* 标签的左右对齐方式
* @enumdesc 左, 右
*/
labelTextAlign: PropTypes.oneOf(['left', 'right']),
/**
* 扩展class
*/
className: PropTypes.string,
/**
* [表单校验] 不能为空
*/
required: PropTypes.bool,
/**
* required 的星号是否显示
*/
asterisk: PropTypes.bool,
/**
* required 自定义错误信息
*/
requiredMessage: PropTypes.string,
/**
* required 自定义触发方式
*/
requiredTrigger: PropTypes.oneOfType([
PropTypes.string,
PropTypes.array,
]),
/**
* [表单校验] 最小值
*/
min: PropTypes.number,
/**
* [表单校验] 最大值
*/
max: PropTypes.number,
/**
* min/max 自定义错误信息
*/
minmaxMessage: PropTypes.string,
/**
* min/max 自定义触发方式
*/
minmaxTrigger: PropTypes.oneOfType([PropTypes.string, PropTypes.array]),
/**
* [表单校验] 字符串最小长度 / 数组最小个数
*/
minLength: PropTypes.number,
/**
* [表单校验] 字符串最大长度 / 数组最大个数
*/
maxLength: PropTypes.number,
/**
* minLength/maxLength 自定义错误信息
*/
minmaxLengthMessage: PropTypes.string,
/**
* minLength/maxLength 自定义触发方式
*/
minmaxLengthTrigger: PropTypes.oneOfType([
PropTypes.string,
PropTypes.array,
]),
/**
* [表单校验] 字符串精确长度 / 数组精确个数
*/
length: PropTypes.number,
/**
* length 自定义错误信息
*/
lengthMessage: PropTypes.string,
/**
* length 自定义触发方式
*/
lengthTrigger: PropTypes.oneOfType([PropTypes.string, PropTypes.array]),
/**
* 正则校验
*/
pattern: PropTypes.any,
/**
* pattern 自定义错误信息
*/
patternMessage: PropTypes.string,
/**
* pattern 自定义触发方式
*/
patternTrigger: PropTypes.oneOfType([
PropTypes.string,
PropTypes.array,
]),
/**
* [表单校验] 四种常用的 pattern
*/
format: PropTypes.oneOf(['number', 'email', 'url', 'tel']),
/**
* format 自定义错误信息
*/
formatMessage: PropTypes.string,
/**
* format 自定义触发方式
*/
formatTrigger: PropTypes.oneOfType([PropTypes.string, PropTypes.array]),
/**
* [表单校验] 自定义校验函数
*/
validator: PropTypes.func,
/**
* validator 自定义触发方式
*/
validatorTrigger: PropTypes.oneOfType([
PropTypes.string,
PropTypes.array,
]),
/**
* 是否修改数据时自动触发校验
*/
autoValidate: PropTypes.bool,
/**
* 预设屏幕宽度
*/
device: PropTypes.oneOf(['phone', 'tablet', 'desktop']),
responsive: PropTypes.bool,
/**
* 在响应式布局模式下,表单项占多少列
*/
colSpan: PropTypes.number,
/**
* 在响应式布局下且label在左边时label的宽度是多少
*/
labelWidth: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
/**
* 是否开启预览态
*/
isPreview: PropTypes.bool,
/**
* 预览态模式下渲染的内容
* @param {any} value 根据包裹的组件的 value 类型而决定
*/
renderPreview: PropTypes.func,
};
static defaultProps = {
prefix: 'next-',
hasFeedback: false,
labelWidth: 100,
};
static contextTypes = {
_formField: PropTypes.object,
_formSize: PropTypes.oneOf(['large', 'small', 'medium']),
_formPreview: PropTypes.bool,
_formFullWidth: PropTypes.bool,
};
static _typeMark = 'form_item';
/**
* 从子元素里面提取表单组件
*/
getNames() {
const children = React.Children.toArray(this.props.children);
return children
.filter(c => {
return c.props && ('name' in c.props || 'data-meta' in c.props);
})
.map(c => {
return c.props.name || c.props.id;
});
}
getHelper() {
const help = this.props.help;
const _formField = this.context._formField;
return (
<Error
name={help === undefined ? this.getNames() : undefined}
field={_formField}
>
{help}
</Error>
);
}
getState() {
const { validateState } = this.props;
if (validateState) {
return validateState;
}
if (this.context._formField) {
const { getState } = this.context._formField;
const names = this.getNames();
if (!names.length) {
return '';
}
// get first name
return getState(names[0]);
}
return undefined;
}
getSize() {
return this.props.size || this.context._formSize;
}
getIsPreview() {
return 'isPreview' in this.props
? this.props.isPreview
: this.context._formPreview;
}
getFullWidth() {
return isNil(this.props.fullWidth)
? !!this.context._formFullWidth
: this.props.fullWidth;
}
getItemLabel() {
const {
id,
required,
asterisk = required,
label,
labelCol,
wrapperCol,
prefix,
responsive,
labelWidth,
labelTextAlign,
} = this.props;
const labelAlign = this.getLabelAlign(
this.props.labelAlign,
this.props.device
);
if (!label) {
return null;
}
const ele = (
<label
htmlFor={id || this.getNames()[0]}
required={asterisk}
key="label"
>
{label}
</label>
);
const cls = classNames({
[`${prefix}form-item-label`]: true,
[`${prefix}left`]: labelTextAlign === 'left',
});
if (responsive && labelWidth && labelAlign !== 'top') {
return (
<div className={cls} style={{ width: labelWidth }}>
{ele}
</div>
);
}
if ((wrapperCol || labelCol) && labelAlign !== 'top') {
return (
<Col {...labelCol} className={cls}>
{ele}
</Col>
);
}
return <div className={cls}>{ele}</div>;
}
getItemWrapper() {
const {
hasFeedback,
labelCol,
wrapperCol,
children,
extra,
prefix,
renderPreview,
} = this.props;
const labelAlign = this.getLabelAlign(
this.props.labelAlign,
this.props.device
);
const state = this.getState();
const isPreview = this.getIsPreview();
const childrenProps = {
size: this.getSize(),
};
if (isPreview) {
childrenProps.isPreview = true;
}
if (
'renderPreview' in this.props &&
typeof renderPreview === 'function'
) {
childrenProps.renderPreview = renderPreview;
}
if (state && (state === 'error' || hasFeedback)) {
childrenProps.state = state;
}
if (labelAlign === 'inset') {
childrenProps.label = this.getItemLabel();
}
let childrenNode = children;
if (typeof children === 'function' && this.context._formField) {
childrenNode = children(this.context._formField.getValues());
}
const ele = React.Children.map(childrenNode, child => {
if (
child &&
typeof child.type === 'function' &&
child.type._typeMark !== 'form_item' &&
child.type._typeMark !== 'form_error'
) {
let extraProps = childrenProps;
if (
this.context._formField &&
'name' in child.props &&
!('data-meta' in child.props)
) {
extraProps = this.context._formField.init(
child.props.name,
{
...getFieldInitCfg(
this.props,
child.type.displayName
),
props: { ...child.props, ref: child.ref },
},
childrenProps
);
} else {
extraProps = Object.assign({}, child.props, extraProps);
}
return React.cloneElement(child, extraProps);
}
return child;
});
const help = this.getHelper();
if ((wrapperCol || labelCol) && labelAlign !== 'top') {
return (
<Col
{...wrapperCol}
className={`${prefix}form-item-control`}
key="item"
>
{ele} {help} {extra}
</Col>
);
}
return (
<div className={`${prefix}form-item-control`}>
{ele} {help} {extra}
</div>
);
}
getLabelAlign(labelAlign, device) {
if (device === 'phone') {
return 'top';
}
return labelAlign;
}
render() {
const {
className,
style,
prefix,
wrapperCol,
labelCol,
responsive,
} = this.props;
const labelAlign = this.getLabelAlign(
this.props.labelAlign,
this.props.device
);
const state = this.getState();
const size = this.getSize();
const fullWidth = this.getFullWidth();
const itemClassName = classNames({
[`${prefix}form-item`]: true,
[`${prefix}${labelAlign}`]: labelAlign,
[`has-${state}`]: !!state,
[`${prefix}${size}`]: !!size,
[`${prefix}form-item-fullwidth`]: fullWidth,
[`${className}`]: !!className,
});
// 垂直模式并且左对齐才用到
const Tag = responsive
? Cell
: (wrapperCol || labelCol) && labelAlign !== 'top'
? Row
: 'div';
const label = labelAlign === 'inset' ? null : this.getItemLabel();
return (
<Tag
{...obj.pickOthers(Item.propTypes, this.props)}
className={itemClassName}
style={style}
>
{label}
{this.getItemWrapper()}
</Tag>
);
}
}