@mantine/core/cjs/components/Textarea/Autosize.cjs.map

React components library focused on usability, accessibility and developer experience

{"version":3,"file":"Autosize.cjs","names":[],"sources":["../../../src/components/Textarea/Autosize.tsx"],"sourcesContent":["import React, { useEffect, useLayoutEffect, useRef } from 'react';\nimport { useMergedRef } from '@mantine/hooks';\n\ntype TextareaProps = React.TextareaHTMLAttributes<HTMLTextAreaElement>;\n\nexport interface TextareaAutosizeProps extends Omit<TextareaProps, 'style'> {\n  ref?: React.Ref<HTMLTextAreaElement>;\n  maxRows?: number;\n  minRows?: number;\n  style?: Omit<NonNullable<TextareaProps['style']>, 'maxHeight' | 'minHeight'> & {\n    height?: number;\n  };\n}\n\nconst SIZING_STYLE_KEYS = [\n  'borderBottomWidth',\n  'borderLeftWidth',\n  'borderRightWidth',\n  'borderTopWidth',\n  'boxSizing',\n  'fontFamily',\n  'fontSize',\n  'fontStyle',\n  'fontWeight',\n  'letterSpacing',\n  'lineHeight',\n  'paddingBottom',\n  'paddingLeft',\n  'paddingRight',\n  'paddingTop',\n  'tabSize',\n  'textIndent',\n  'textRendering',\n  'textTransform',\n  'width',\n  'wordBreak',\n  'wordSpacing',\n  'scrollbarGutter',\n] as const;\n\ntype SizingStyleKey = (typeof SIZING_STYLE_KEYS)[number];\n\ninterface SizingData {\n  sizingStyle: Pick<CSSStyleDeclaration, Extract<SizingStyleKey, keyof CSSStyleDeclaration>>;\n  paddingSize: number;\n  borderSize: number;\n}\n\nconst HIDDEN_TEXTAREA_STYLE: Record<string, string> = {\n  'min-height': '0',\n  'max-height': 'none',\n  height: '0',\n  visibility: 'hidden',\n  overflow: 'hidden',\n  position: 'absolute',\n  'z-index': '-1000',\n  top: '0',\n  right: '0',\n  display: 'block',\n};\n\nfunction forceHiddenStyles(node: HTMLElement) {\n  Object.keys(HIDDEN_TEXTAREA_STYLE).forEach((key) => {\n    node.style.setProperty(key, HIDDEN_TEXTAREA_STYLE[key], 'important');\n  });\n}\n\nfunction getSizingData(node: HTMLElement): SizingData | null {\n  const style = window.getComputedStyle(node);\n\n  if (style === null) {\n    return null;\n  }\n\n  const sizingStyle = {} as SizingData['sizingStyle'];\n  for (const key of SIZING_STYLE_KEYS) {\n    (sizingStyle as any)[key] = style[key as keyof CSSStyleDeclaration];\n  }\n\n  if ((sizingStyle as any).boxSizing === '') {\n    return null;\n  }\n\n  const paddingSize = parseFloat(sizingStyle.paddingBottom!) + parseFloat(sizingStyle.paddingTop!);\n\n  const borderSize =\n    parseFloat(sizingStyle.borderBottomWidth!) + parseFloat(sizingStyle.borderTopWidth!);\n\n  return { sizingStyle, paddingSize, borderSize };\n}\n\nlet hiddenTextarea: HTMLTextAreaElement | null = null;\n\nfunction calculateNodeHeight(\n  sizingData: SizingData,\n  value: string,\n  minRows = 1,\n  maxRows = Infinity\n): [number, number] {\n  if (!hiddenTextarea) {\n    hiddenTextarea = document.createElement('textarea');\n    hiddenTextarea.setAttribute('tabindex', '-1');\n    hiddenTextarea.setAttribute('aria-hidden', 'true');\n    hiddenTextarea.setAttribute('aria-label', 'autosize measurement');\n    forceHiddenStyles(hiddenTextarea);\n  }\n\n  if (hiddenTextarea.parentNode === null) {\n    document.body.appendChild(hiddenTextarea);\n  }\n\n  const { paddingSize, borderSize, sizingStyle } = sizingData;\n  const { boxSizing } = sizingStyle;\n\n  Object.keys(sizingStyle).forEach((key) => {\n    (hiddenTextarea!.style as any)[key] = (sizingStyle as any)[key];\n  });\n\n  forceHiddenStyles(hiddenTextarea);\n\n  hiddenTextarea.value = value;\n  let height =\n    boxSizing === 'border-box'\n      ? hiddenTextarea.scrollHeight + borderSize\n      : hiddenTextarea.scrollHeight - paddingSize;\n\n  // Double set and calc due to Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1795904\n  hiddenTextarea.value = value;\n  height =\n    boxSizing === 'border-box'\n      ? hiddenTextarea.scrollHeight + borderSize\n      : hiddenTextarea.scrollHeight - paddingSize;\n\n  hiddenTextarea.value = 'x';\n  const rowHeight = hiddenTextarea.scrollHeight - paddingSize;\n\n  let minHeight = rowHeight * minRows;\n  if (boxSizing === 'border-box') {\n    minHeight = minHeight + paddingSize + borderSize;\n  }\n  height = Math.max(minHeight, height);\n\n  let maxHeight = rowHeight * maxRows;\n  if (boxSizing === 'border-box') {\n    maxHeight = maxHeight + paddingSize + borderSize;\n  }\n  height = Math.min(maxHeight, height);\n\n  return [height, rowHeight];\n}\n\nexport function TextareaAutosize({\n  maxRows,\n  minRows,\n  onChange,\n  ref: userRef,\n  ...props\n}: TextareaAutosizeProps) {\n  const isControlled = props.value !== undefined;\n  const libRef = useRef<HTMLTextAreaElement | null>(null);\n  const ref = useMergedRef(libRef, userRef);\n  const heightRef = useRef(0);\n\n  const resizeTextarea = () => {\n    const node = libRef.current!;\n    const nodeSizingData = getSizingData(node);\n\n    if (!nodeSizingData) {\n      return;\n    }\n\n    const [height] = calculateNodeHeight(\n      nodeSizingData,\n      node.value || node.placeholder || 'x',\n      minRows,\n      maxRows\n    );\n\n    if (heightRef.current !== height) {\n      heightRef.current = height;\n      node.style.setProperty('height', `${height}px`, 'important');\n    }\n  };\n\n  const handleChange = (event: React.ChangeEvent<HTMLTextAreaElement>) => {\n    if (!isControlled) {\n      resizeTextarea();\n    }\n    onChange?.(event);\n  };\n\n  useLayoutEffect(resizeTextarea);\n\n  useEffect(() => {\n    const handleResize = () => resizeTextarea();\n    window.addEventListener('resize', handleResize);\n    return () => window.removeEventListener('resize', handleResize);\n  }, []);\n\n  useEffect(() => {\n    const handleFontsLoaded = () => resizeTextarea();\n    document.fonts.addEventListener('loadingdone', handleFontsLoaded);\n    return () => document.fonts.removeEventListener('loadingdone', handleFontsLoaded);\n  }, []);\n\n  useEffect(() => {\n    const handleReset = (event: Event) => {\n      if (libRef.current?.form === event.target && !isControlled) {\n        const currentValue = libRef.current!.value;\n        requestAnimationFrame(() => {\n          if (libRef.current && currentValue !== libRef.current.value) {\n            resizeTextarea();\n          }\n        });\n      }\n    };\n    document.body.addEventListener('reset', handleReset);\n    return () => document.body.removeEventListener('reset', handleReset);\n  }, [isControlled]);\n\n  return <textarea {...props} onChange={handleChange} ref={ref} 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