@mui/material/TextareaAutosize/TextareaAutosize.js

'use client';

import * as React from 'react';
import PropTypes from 'prop-types';
import { unstable_debounce as debounce, unstable_useForkRef as useForkRef, unstable_useEnhancedEffect as useEnhancedEffect, unstable_ownerWindow as ownerWindow } from '@mui/utils';
import { jsx as _jsx, jsxs as _jsxs } from "react/jsx-runtime";
function getStyleValue(value) {
  return parseInt(value, 10) || 0;
}
const styles = {
  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)'
  }
};
function isEmpty(obj) {
  return obj === undefined || obj === null || Object.keys(obj).length === 0 || obj.outerHeightStyle === 0 && !obj.overflowing;
}

/**
 *
 * Demos:
 *
 * - [Textarea Autosize](https://mui.com/material-ui/react-textarea-autosize/)
 *
 * API:
 *
 * - [TextareaAutosize API](https://mui.com/material-ui/api/textarea-autosize/)
 */
const TextareaAutosize = /*#__PURE__*/React.forwardRef(function TextareaAutosize(props, forwardedRef) {
  const {
    onChange,
    maxRows,
    minRows = 1,
    style,
    value,
    ...other
  } = props;
  const {
    current: isControlled
  } = React.useRef(value != null);
  const inputRef = React.useRef(null);
  const handleRef = useForkRef(forwardedRef, inputRef);
  const heightRef = React.useRef(null);
  const shadowRef = React.useRef(null);
  const calculateTextareaStyles = React.useCallback(() => {
    const input = inputRef.current;
    const containerWindow = ownerWindow(input);
    const computedStyle = containerWindow.getComputedStyle(input);

    // If input's width is shrunk and it's not visible, don't sync height.
    if (computedStyle.width === '0px') {
      return {
        outerHeightStyle: 0,
        overflowing: false
      };
    }
    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.boxSizing;
    const padding = getStyleValue(computedStyle.paddingBottom) + getStyleValue(computedStyle.paddingTop);
    const border = getStyleValue(computedStyle.borderBottomWidth) + getStyleValue(computedStyle.borderTopWidth);

    // The height of the inner content
    const innerHeight = inputShallow.scrollHeight;

    // Measure height of a textarea with a single row
    inputShallow.value = 'x';
    const singleRowHeight = inputShallow.scrollHeight;

    // 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 overflowing = Math.abs(outerHeight - innerHeight) <= 1;
    return {
      outerHeightStyle,
      overflowing
    };
  }, [maxRows, minRows, props.placeholder]);
  const syncHeight = React.useCallback(() => {
    const textareaStyles = calculateTextareaStyles();
    if (isEmpty(textareaStyles)) {
      return;
    }
    const outerHeightStyle = textareaStyles.outerHeightStyle;
    const input = inputRef.current;
    if (heightRef.current !== outerHeightStyle) {
      heightRef.current = outerHeightStyle;
      input.style.height = `${outerHeightStyle}px`;
    }
    input.style.overflow = textareaStyles.overflowing ? 'hidden' : '';
  }, [calculateTextareaStyles]);
  useEnhancedEffect(() => {
    const handleResize = () => {
      syncHeight();
    };
    // Workaround a "ResizeObserver loop completed with undelivered notifications" error
    // in test.
    // Note that we might need to use this logic in production per https://github.com/WICG/resize-observer/issues/38
    // Also see https://github.com/mui/mui-x/issues/8733
    let rAF;
    const rAFHandleResize = () => {
      cancelAnimationFrame(rAF);
      rAF = requestAnimationFrame(() => {
        handleResize();
      });
    };
    const debounceHandleResize = debounce(handleResize);
    const input = inputRef.current;
    const containerWindow = ownerWindow(input);
    containerWindow.addEventListener('resize', debounceHandleResize);
    let resizeObserver;
    if (typeof ResizeObserver !== 'undefined') {
      resizeObserver = new ResizeObserver(process.env.NODE_ENV === 'test' ? rAFHandleResize : handleResize);
      resizeObserver.observe(input);
    }
    return () => {
      debounceHandleResize.clear();
      cancelAnimationFrame(rAF);
      containerWindow.removeEventListener('resize', debounceHandleResize);
      if (resizeObserver) {
        resizeObserver.disconnect();
      }
    };
  }, [calculateTextareaStyles, syncHeight]);
  useEnhancedEffect(() => {
    syncHeight();
  });
  const handleChange = event => {
    if (!isControlled) {
      syncHeight();
    }
    if (onChange) {
      onChange(event);
    }
  };
  return /*#__PURE__*/_jsxs(React.Fragment, {
    children: [/*#__PURE__*/_jsx("textarea", {
      value: value,
      onChange: handleChange,
      ref: handleRef
      // Apply the rows prop to get a "correct" first SSR paint
      ,
      rows: minRows,
      style: style,
      ...other
    }), /*#__PURE__*/_jsx("textarea", {
      "aria-hidden": true,
      className: props.className,
      readOnly: true,
      ref: shadowRef,
      tabIndex: -1,
      style: {
        ...styles.shadow,
        ...style,
        paddingTop: 0,
        paddingBottom: 0
      }
    })]
  });
});
process.env.NODE_ENV !== "production" ? TextareaAutosize.propTypes /* remove-proptypes */ = {
  // ┌────────────────────────────── Warning ──────────────────────────────┐
  // │ These PropTypes are generated from the TypeScript type definitions. │
  // │ To update them, edit the TypeScript types and run `pnpm proptypes`. │
  // └─────────────────────────────────────────────────────────────────────┘
  /**
   * @ignore
   */
  className: PropTypes.string,
  /**
   * Maximum number of rows to display.
   */
  maxRows: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
  /**
   * Minimum number of rows to display.
   * @default 1
   */
  minRows: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
  /**
   * @ignore
   */
  onChange: PropTypes.func,
  /**
   * @ignore
   */
  placeholder: PropTypes.string,
  /**
   * @ignore
   */
  style: PropTypes.object,
  /**
   * @ignore
   */
  value: PropTypes.oneOfType([PropTypes.arrayOf(PropTypes.string), PropTypes.number, PropTypes.string])
} : void 0;
export default TextareaAutosize;