Updated the fade-in effect on reveal of enhanced text and fix other issues on feedback

components/form/prompt-input/PromptInput.es6.js

@@ -1,11 +1,36 @@
 import React from 'react'
-import classnames from 'classnames'
 import PropTypes from 'prop-types'
+import classnames from 'classnames'
+
+function PromptInput ({ className, children }) {
+
+  let textarea = null
+  let actions = null
+  let overlay = null
+
+  React.Children.forEach(children, child => {
+    if (child.type && child.type.displayName === 'PromptInputTextarea') {
+      textarea = child
+    } else if (child.type && child.type.displayName === 'PromptInputActions') {
+      actions = child
+    } else if (child.type && child.type.name === 'TextRevealOverlay') {
+      overlay = child
+    }
+  })
 
-function PromptInput ({ children, className }) {
   return (
     <div className={classnames('ds-prompt-input', className)}>
-      {children}
+      {textarea}
+      {overlay}
+      {actions}
+      {React.Children.map(children, child => {
+        if ((child.type && child.type.displayName !== 'PromptInputTextarea' &&
+             child.type.displayName !== 'PromptInputActions') &&
+            (child.type && child.type.name !== 'TextRevealOverlay')) {
+          return child
+        }
+        return null
+      })}
     </div>
   )
 }
@@ -15,10 +40,5 @@ PromptInput.propTypes = {
   children: PropTypes.node
 }
 
-PromptInput.defaultProps = {
-  className: '',
-  children: null
-}
-
 export default PromptInput
 

components/form/prompt-input/TextRevealOverlay.es6.js

@@ -0,0 +1,181 @@
+import React, { useEffect, useState, useRef } from 'react'
+import PropTypes from 'prop-types'
+
+function TextRevealOverlay({
+  text,
+  isRevealing,
+  lastParagraphIndex,
+  className,
+  textareaRef,
+  onAnimationComplete
+}) {
+  const [paragraphs, setParagraphs] = useState([])
+  const [isAnimatingLastParagraph, setIsAnimatingLastParagraph] = useState(false)
+  const overlayRef = useRef(null)
+
+  // Split text into paragraphs whenever text changes
+  useEffect(() => {
+    if (text) {
+      const split = text.split(/\n{2,}|\r\n{2,}/)
+                         .map(p => p.trim())
+                         .filter(p => p.length > 0)
+      setParagraphs(split)
+    } else {
+      setParagraphs([])
+    }
+  }, [text])
+
+  useEffect(() => {
+    if (isAnimatingLastParagraph && lastParagraphIndex === paragraphs.length - 1) {
+      const timer = setTimeout(() => {
+        setIsAnimatingLastParagraph(false)
+        if (onAnimationComplete) {
+          onAnimationComplete()
+        }
+      }, 500)
+
+      return () => clearTimeout(timer)
+    }
+  }, [isAnimatingLastParagraph, lastParagraphIndex, paragraphs.length, onAnimationComplete])
+
+
+  useEffect(() => {
+    if (lastParagraphIndex === paragraphs.length - 1 && paragraphs.length > 0) {
+      setIsAnimatingLastParagraph(true)
+    }
+  }, [lastParagraphIndex, paragraphs.length])
+
+
+  useEffect(() => {
+    if (!textareaRef || !textareaRef.current || !overlayRef.current || !isRevealing) return
+
+    const textarea = textareaRef.current
+    const overlay = overlayRef.current
+
+    // Function to update dimensions whenever they change
+    const updateDimensions = () => {
+      // Position relative to the prompt-input container
+      const promptInput = textarea.closest('.ds-prompt-input')
+      let paddingLeft = '16px'
+      let paddingTop = '16px'
+
+      if (promptInput) {
+        const promptStyles = window.getComputedStyle(promptInput)
+        if (promptStyles.paddingLeft) {
+          paddingLeft = promptStyles.paddingLeft
+        }
+        if (promptStyles.paddingTop) {
+          paddingTop = promptStyles.paddingTop
+        }
+      }
+
+      // Get current styles
+      const textareaStyles = window.getComputedStyle(textarea)
+
+      // Apply exact dimensions and styling
+      overlay.style.width = textareaStyles.width
+      overlay.style.fontSize = textareaStyles.fontSize
+      overlay.style.lineHeight = textareaStyles.lineHeight
+      overlay.style.fontFamily = textareaStyles.fontFamily
+      overlay.style.fontWeight = textareaStyles.fontWeight
+      overlay.style.color = textareaStyles.color
+
+      // Set exact position
+      overlay.style.position = 'absolute'
+      overlay.style.top = paddingTop
+      overlay.style.left = paddingLeft
+      overlay.style.width = 'calc(100% - ' + (parseInt(paddingLeft) * 2) + 'px)'
+
+      // Set max-height to match textarea max-height
+      overlay.style.maxHeight = textareaStyles.maxHeight
+
+      // Match the actual height if it's calculated
+      if (textarea.style.height) {
+        overlay.style.height = textarea.style.height
+      }
+    }
+
+    // Initial update
+    updateDimensions()
+
+    // Set up mutation observer to detect height changes
+    let observer = null
+    if (typeof MutationObserver !== 'undefined') {
+      observer = new MutationObserver((mutations) => {
+        mutations.forEach((mutation) => {
+          if (mutation.attributeName === 'style') {
+            updateDimensions()
+          }
+        })
+      })
+
+      observer.observe(textarea, {
+        attributes: true,
+        attributeFilter: ['style']
+      })
+    }
+
+    const syncScroll = () => {
+      if (overlayRef.current && isRevealing) {
+        overlayRef.current.scrollTop = textarea.scrollTop
+      }
+    }
+
+    textarea.addEventListener('scroll', syncScroll)
+
+    window.addEventListener('resize', updateDimensions)
+
+    syncScroll()
+
+    return () => {
+      textarea.removeEventListener('scroll', syncScroll)
+      window.removeEventListener('resize', updateDimensions)
+      if (observer) {
+        observer.disconnect()
+      }
+    }
+  }, [textareaRef, isRevealing, paragraphs])
+
+  if (!isRevealing || paragraphs.length === 0) {
+    return null
+  }
+
+  return (
+    <div
+      ref={overlayRef}
+      className={`ds-prompt-input__text-reveal-overlay ${className || ''}`}
+      aria-hidden="true"
+    >
+      {paragraphs.map((paragraph, index) => (
+        <p
+          key={index}
+          className={`ds-prompt-input__text-reveal-paragraph ${
+            index === lastParagraphIndex ? 'ds-prompt-input__text-reveal-paragraph--animating' : ''
+          }`}
+        >
+          {paragraph}
+        </p>
+      ))}
+    </div>
+  )
+}
+
+TextRevealOverlay.propTypes = {
+  text: PropTypes.string,
+  isRevealing: PropTypes.bool,
+  lastParagraphIndex: PropTypes.number,
+  className: PropTypes.string,
+  textareaRef: PropTypes.object,
+  onAnimationComplete: PropTypes.func
+}
+
+TextRevealOverlay.defaultProps = {
+  text: '',
+  isRevealing: false,
+  lastParagraphIndex: -1,
+  className: '',
+  textareaRef: null,
+  onAnimationComplete: null
+}
+
+export default TextRevealOverlay

components/lib/useProgressiveTextReveal.es6.js

@@ -0,0 +1,124 @@
+
+import { useState, useEffect, useRef, useCallback } from 'react'
+
+function useProgressiveTextReveal({
+  onComplete = () => {},
+  paragraphDelay = 400,
+  onCompleteTimeout = 600,
+  onParagraphAdded = () => {}
+} = {}) {
+  const [isRevealing, setIsRevealing] = useState(false)
+  const [currentText, setCurrentText] = useState('')
+  const [newParagraphAdded, setNewParagraphAdded] = useState(false)
+  const [lastParagraphIndex, setLastParagraphIndex] = useState(-1)
+  const timeoutsRef = useRef([])
+  const paragraphsRef = useRef([])
+  const currentIndexRef = useRef(0)
+
+  const clearAllTimeouts = useCallback(() => {
+    timeoutsRef.current.forEach(timeoutId => clearTimeout(timeoutId))
+    timeoutsRef.current = []
+  }, [])
+
+  // Reset the reveal state
+  const resetTextReveal = useCallback(() => {
+    clearAllTimeouts()
+    setCurrentText('')
+    setIsRevealing(false)
+    setNewParagraphAdded(false)
+    setLastParagraphIndex(-1)
+    paragraphsRef.current = []
+    currentIndexRef.current = 0
+  }, [clearAllTimeouts])
+
+  // This function adds a single paragraph with animation trigger
+  const addNextParagraph = useCallback(() => {
+    if (currentIndexRef.current >= paragraphsRef.current.length) {
+
+      // Allow time for the final animation to complete before signaling done
+      const finalTimeout = setTimeout(() => {
+        onComplete(currentText)
+      }, onCompleteTimeout)
+
+      timeoutsRef.current.push(finalTimeout)
+      return
+    }
+
+    // First paragraph or append with double newline
+    const paragraphToAdd = paragraphsRef.current[currentIndexRef.current]
+
+    if (currentIndexRef.current === 0) {
+      setCurrentText(paragraphToAdd)
+    } else {
+      setCurrentText(prev => `${prev}\n\n${paragraphToAdd}`)
+    }
+
+    // Track the index of the paragraph we just added
+    setLastParagraphIndex(currentIndexRef.current)
+
+    // Signal that a new paragraph was added (for animation)
+    setNewParagraphAdded(true)
+
+    // Call the paragraph added callback
+    if (onParagraphAdded) {
+      onParagraphAdded(currentIndexRef.current)
+    }
+
+    // Reset animation flag after animation completes
+    const resetTimeout = setTimeout(() => {
+      setNewParagraphAdded(false)
+    }, 500)
+
+    timeoutsRef.current.push(resetTimeout)
+
+
+    currentIndexRef.current++
+
+    // Schedule next paragraph if there are more
+    if (currentIndexRef.current < paragraphsRef.current.length) {
+      const nextTimeout = setTimeout(addNextParagraph, paragraphDelay)
+      timeoutsRef.current.push(nextTimeout)
+    }
+  }, [currentText, onComplete, onParagraphAdded, paragraphDelay])
+
+  // Start revealing text paragraph by paragraph
+  const revealText = useCallback((text) => {
+    if (!text) return
+
+    resetTextReveal()
+    setIsRevealing(true)
+
+    // Split text into paragraphs (handles different line break formats)
+    const paragraphs = text.split(/\n{2,}|\r\n{2,}/)
+                          .map(p => p.trim())
+                          .filter(p => p.length > 0)
+
+    if (paragraphs.length === 0) {
+      setIsRevealing(false)
+      return
+    }
+
+    paragraphsRef.current = paragraphs
+    currentIndexRef.current = 0
+
+
+    addNextParagraph()
+
+  }, [resetTextReveal, addNextParagraph])
+
+
+  useEffect(() => {
+    return () => clearAllTimeouts()
+  }, [clearAllTimeouts])
+
+  return {
+    revealText,
+    resetTextReveal,
+    currentText,
+    isRevealing,
+    newParagraphAdded,
+    lastParagraphIndex
+  }
+}
+
+export default useProgressiveTextReveal