antd-mobile
Version:
<div align="center">
144 lines • 4.86 kB
JavaScript
import React, { forwardRef, useImperativeHandle, useRef } from 'react';
import { useIsomorphicLayoutEffect } from 'ahooks';
import runes from 'runes2';
import { withNativeProps } from '../../utils/native-props';
import { usePropsValue } from '../../utils/use-props-value';
import { mergeProps } from '../../utils/with-default-props';
import { devError } from '../../utils/dev-log';
import useInputHandleKeyDown from '../../components/input/useInputHandleKeyDown';
const classPrefix = 'adm-text-area';
const defaultProps = {
rows: 2,
showCount: false,
autoSize: false,
defaultValue: ''
};
export const TextArea = forwardRef((p, ref) => {
const props = mergeProps(defaultProps, p);
const {
autoSize,
showCount,
maxLength
} = props;
const [value, setValue] = usePropsValue(Object.assign(Object.assign({}, props), {
value: props.value === null ? '' : props.value
}));
if (props.value === null) {
devError('TextArea', '`value` prop on `TextArea` should not be `null`. Consider using an empty string to clear the component.');
}
const nativeTextAreaRef = useRef(null);
// https://github.com/ant-design/ant-design-mobile/issues/5961
const heightRef = useRef('auto');
// https://github.com/ant-design/ant-design-mobile/issues/6051
const hiddenTextAreaRef = useRef(null);
const handleKeydown = useInputHandleKeyDown({
onEnterPress: props.onEnterPress,
onKeyDown: props.onKeyDown,
nativeInputRef: nativeTextAreaRef,
enterKeyHint: props.enterKeyHint
});
useImperativeHandle(ref, () => ({
clear: () => {
setValue('');
},
focus: () => {
var _a;
(_a = nativeTextAreaRef.current) === null || _a === void 0 ? void 0 : _a.focus();
},
blur: () => {
var _a;
(_a = nativeTextAreaRef.current) === null || _a === void 0 ? void 0 : _a.blur();
},
get nativeElement() {
return nativeTextAreaRef.current;
}
}));
useIsomorphicLayoutEffect(() => {
if (!autoSize) return;
const textArea = nativeTextAreaRef.current;
const hiddenTextArea = hiddenTextAreaRef.current;
if (!textArea) return;
textArea.style.height = heightRef.current;
if (!hiddenTextArea) return;
let height = hiddenTextArea.scrollHeight;
if (typeof autoSize === 'object') {
const computedStyle = window.getComputedStyle(textArea);
const lineHeight = parseFloat(computedStyle.lineHeight);
if (autoSize.minRows) {
height = Math.max(height, autoSize.minRows * lineHeight);
}
if (autoSize.maxRows) {
height = Math.min(height, autoSize.maxRows * lineHeight);
}
}
heightRef.current = `${height}px`;
textArea.style.height = `${height}px`;
}, [value, autoSize]);
const compositingRef = useRef(false);
let count;
const valueLength = runes(value).length;
if (typeof showCount === 'function') {
count = showCount(valueLength, maxLength);
} else if (showCount) {
count = React.createElement("div", {
className: `${classPrefix}-count`
}, maxLength === undefined ? valueLength : valueLength + '/' + maxLength);
}
let rows = props.rows;
if (typeof autoSize === 'object') {
if (autoSize.maxRows && rows > autoSize.maxRows) {
rows = autoSize.maxRows;
}
if (autoSize.minRows && rows < autoSize.minRows) {
rows = autoSize.minRows;
}
}
return withNativeProps(props, React.createElement("div", {
className: classPrefix
}, React.createElement("textarea", {
ref: nativeTextAreaRef,
className: `${classPrefix}-element`,
rows: rows,
value: value,
placeholder: props.placeholder,
onChange: e => {
let v = e.target.value;
if (maxLength && !compositingRef.current) {
v = runes(v).slice(0, maxLength).join('');
}
setValue(v);
},
id: props.id,
onCompositionStart: e => {
var _a;
compositingRef.current = true;
(_a = props.onCompositionStart) === null || _a === void 0 ? void 0 : _a.call(props, e);
},
onCompositionEnd: e => {
var _a;
compositingRef.current = false;
if (maxLength) {
const v = e.target.value;
setValue(runes(v).slice(0, maxLength).join(''));
}
(_a = props.onCompositionEnd) === null || _a === void 0 ? void 0 : _a.call(props, e);
},
autoComplete: props.autoComplete,
autoFocus: props.autoFocus,
disabled: props.disabled,
readOnly: props.readOnly,
name: props.name,
onFocus: props.onFocus,
onBlur: props.onBlur,
onClick: props.onClick,
onKeyDown: handleKeydown
}), count, autoSize && React.createElement("textarea", {
ref: hiddenTextAreaRef,
className: `${classPrefix}-element ${classPrefix}-element-hidden`,
value: value,
rows: rows,
"aria-hidden": true,
readOnly: true
})));
});
TextArea.defaultProps = defaultProps;