Initial commit

web/app/components/base/auto-height-textarea/index.tsx

@@ -0,0 +1,75 @@
+import { forwardRef, useEffect, useRef } from 'react'
+import cn from 'classnames'
+
+type IProps = {
+  placeholder?: string
+  value: string
+  onChange: (e: React.ChangeEvent<HTMLTextAreaElement>) => void
+  className?: string
+  minHeight?: number
+  maxHeight?: number
+  autoFocus?: boolean
+  controlFocus?: number
+  onKeyDown?: (e: React.KeyboardEvent<HTMLTextAreaElement>) => void
+  onKeyUp?: (e: React.KeyboardEvent<HTMLTextAreaElement>) => void
+}
+
+const AutoHeightTextarea = forwardRef(
+  (
+    { value, onChange, placeholder, className, minHeight = 36, maxHeight = 96, autoFocus, controlFocus, onKeyDown, onKeyUp }: IProps,
+    outerRef: any,
+  ) => {
+    const ref = outerRef || useRef<HTMLTextAreaElement>(null)
+
+    const doFocus = () => {
+      if (ref.current) {
+        // console.log('focus')
+        ref.current.setSelectionRange(value.length, value.length)
+        ref.current.focus()
+        return true
+      }
+      // console.log(autoFocus, 'not focus')
+      return false
+    }
+
+    const focus = () => {
+      if (!doFocus()) {
+        let hasFocus = false
+        const runId = setInterval(() => {
+          hasFocus = doFocus()
+          if (hasFocus)
+            clearInterval(runId)
+        }, 100)
+      }
+    }
+
+    useEffect(() => {
+      if (autoFocus)
+        focus()
+    }, [])
+    useEffect(() => {
+      if (controlFocus)
+        focus()
+    }, [controlFocus])
+
+    return (
+      <div className='relative'>
+        <div className={cn(className, 'invisible whitespace-pre-wrap break-all  overflow-y-auto')} style={{ minHeight, maxHeight }}>
+          {!value ? placeholder : value.replace(/\n$/, '\n ')}
+        </div>
+        <textarea
+          ref={ref}
+          autoFocus={autoFocus}
+          className={cn(className, 'absolute inset-0 resize-none overflow-hidden')}
+          placeholder={placeholder}
+          onChange={onChange}
+          onKeyDown={onKeyDown}
+          onKeyUp={onKeyUp}
+          value={value}
+        />
+      </div>
+    )
+  },
+)
+
+export default AutoHeightTextarea