@material-ui/core
Version:
React components that implement Google's Material Design.
220 lines (192 loc) • 7.26 kB
JavaScript
import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
import * as React from 'react';
import PropTypes from 'prop-types';
import debounce from '../utils/debounce';
import useForkRef from '../utils/useForkRef';
import deprecatedPropType from '../utils/deprecatedPropType';
function getStyleValue(computedStyle, property) {
return parseInt(computedStyle[property], 10) || 0;
}
const useEnhancedEffect = typeof window !== 'undefined' ? React.useLayoutEffect : React.useEffect;
const styles = {
/* Styles applied to the shadow textarea element. */
shadow: {
// Visibility needed to hide the extra text area on iPads
visibility: 'hidden',
// Remove from the content flow
position: 'absolute',
// Ignore the scrollbar width
overflow: 'hidden',
height: 0,
top: 0,
left: 0,
// Create a new layer, increase the isolation of the computed values
transform: 'translateZ(0)'
}
};
const TextareaAutosize = /*#__PURE__*/React.forwardRef(function TextareaAutosize(props, ref) {
const {
onChange,
rows,
rowsMax,
rowsMin: rowsMinProp,
maxRows: maxRowsProp,
minRows: minRowsProp = 1,
style,
value
} = props,
other = _objectWithoutPropertiesLoose(props, ["onChange", "rows", "rowsMax", "rowsMin", "maxRows", "minRows", "style", "value"]);
const maxRows = maxRowsProp || rowsMax;
const minRows = rows || rowsMinProp || minRowsProp;
const {
current: isControlled
} = React.useRef(value != null);
const inputRef = React.useRef(null);
const handleRef = useForkRef(ref, inputRef);
const shadowRef = React.useRef(null);
const renders = React.useRef(0);
const [state, setState] = React.useState({});
const syncHeight = React.useCallback(() => {
const input = inputRef.current;
const computedStyle = window.getComputedStyle(input);
const inputShallow = shadowRef.current;
inputShallow.style.width = computedStyle.width;
inputShallow.value = input.value || props.placeholder || 'x';
if (inputShallow.value.slice(-1) === '\n') {
// Certain fonts which overflow the line height will cause the textarea
// to report a different scrollHeight depending on whether the last line
// is empty. Make it non-empty to avoid this issue.
inputShallow.value += ' ';
}
const boxSizing = computedStyle['box-sizing'];
const padding = getStyleValue(computedStyle, 'padding-bottom') + getStyleValue(computedStyle, 'padding-top');
const border = getStyleValue(computedStyle, 'border-bottom-width') + getStyleValue(computedStyle, 'border-top-width'); // The height of the inner content
const innerHeight = inputShallow.scrollHeight - padding; // Measure height of a textarea with a single row
inputShallow.value = 'x';
const singleRowHeight = inputShallow.scrollHeight - padding; // The height of the outer content
let outerHeight = innerHeight;
if (minRows) {
outerHeight = Math.max(Number(minRows) * singleRowHeight, outerHeight);
}
if (maxRows) {
outerHeight = Math.min(Number(maxRows) * singleRowHeight, outerHeight);
}
outerHeight = Math.max(outerHeight, singleRowHeight); // Take the box sizing into account for applying this value as a style.
const outerHeightStyle = outerHeight + (boxSizing === 'border-box' ? padding + border : 0);
const overflow = Math.abs(outerHeight - innerHeight) <= 1;
setState(prevState => {
// Need a large enough difference to update the height.
// This prevents infinite rendering loop.
if (renders.current < 20 && (outerHeightStyle > 0 && Math.abs((prevState.outerHeightStyle || 0) - outerHeightStyle) > 1 || prevState.overflow !== overflow)) {
renders.current += 1;
return {
overflow,
outerHeightStyle
};
}
if (process.env.NODE_ENV !== 'production') {
if (renders.current === 20) {
console.error(['Material-UI: Too many re-renders. The layout is unstable.', 'TextareaAutosize limits the number of renders to prevent an infinite loop.'].join('\n'));
}
}
return prevState;
});
}, [maxRows, minRows, props.placeholder]);
React.useEffect(() => {
const handleResize = debounce(() => {
renders.current = 0;
syncHeight();
});
window.addEventListener('resize', handleResize);
return () => {
handleResize.clear();
window.removeEventListener('resize', handleResize);
};
}, [syncHeight]);
useEnhancedEffect(() => {
syncHeight();
});
React.useEffect(() => {
renders.current = 0;
}, [value]);
const handleChange = event => {
renders.current = 0;
if (!isControlled) {
syncHeight();
}
if (onChange) {
onChange(event);
}
};
return /*#__PURE__*/React.createElement(React.Fragment, null, /*#__PURE__*/React.createElement("textarea", _extends({
value: value,
onChange: handleChange,
ref: handleRef // Apply the rows prop to get a "correct" first SSR paint
,
rows: minRows,
style: _extends({
height: state.outerHeightStyle,
// Need a large enough difference to allow scrolling.
// This prevents infinite rendering loop.
overflow: state.overflow ? 'hidden' : null
}, style)
}, other)), /*#__PURE__*/React.createElement("textarea", {
"aria-hidden": true,
className: props.className,
readOnly: true,
ref: shadowRef,
tabIndex: -1,
style: _extends({}, styles.shadow, style)
}));
});
process.env.NODE_ENV !== "production" ? TextareaAutosize.propTypes = {
// ----------------------------- Warning --------------------------------
// | These PropTypes are generated from the TypeScript type definitions |
// | To update them edit the d.ts file and run "yarn proptypes" |
// ----------------------------------------------------------------------
/**
* @ignore
*/
className: PropTypes.string,
/**
* Maximum number of rows to display.
*/
maxRows: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
/**
* Minimum number of rows to display.
*/
minRows: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
/**
* @ignore
*/
onChange: PropTypes.func,
/**
* @ignore
*/
placeholder: PropTypes.string,
/**
* Minimum number of rows to display.
* @deprecated Use `minRows` instead.
*/
rows: deprecatedPropType(PropTypes.oneOfType([PropTypes.number, PropTypes.string]), 'Use `minRows` instead.'),
/**
* Maximum number of rows to display.
* @deprecated Use `maxRows` instead.
*/
rowsMax: deprecatedPropType(PropTypes.oneOfType([PropTypes.number, PropTypes.string]), 'Use `maxRows` instead.'),
/**
* Minimum number of rows to display.
* @deprecated Use `minRows` instead.
*/
rowsMin: deprecatedPropType(PropTypes.oneOfType([PropTypes.number, PropTypes.string]), 'Use `minRows` instead.'),
/**
* @ignore
*/
style: PropTypes.object,
/**
* @ignore
*/
value: PropTypes.oneOfType([PropTypes.arrayOf(PropTypes.string), PropTypes.number, PropTypes.string])
} : void 0;
export default TextareaAutosize;