Add ability to attach images to messages

webview-ui/src/components/ChatView.tsx

@@ -13,6 +13,7 @@ import ChatRow from "./ChatRow"
 import TaskHeader from "./TaskHeader"
 import { Virtuoso, type VirtuosoHandle } from "react-virtuoso"
 import Announcement from "./Announcement"
+import Thumbnails from "./Thumbnails"
 
 interface ChatViewProps {
 	messages: ClaudeMessage[]
@@ -21,7 +22,9 @@ interface ChatViewProps {
 	showAnnouncement: boolean
 	hideAnnouncement: () => void
 }
-// maybe instead of storing state in App, just make chatview  always show so dont conditionally load/unload? need to make sure messages are persisted (i remember seeing something about how webviews can be frozen in docs)
+
+const MAX_IMAGES_PER_MESSAGE = 20 // Anthropic limits to 20 images
+
 const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideAnnouncement }: ChatViewProps) => {
 	//const task = messages.length > 0 ? (messages[0].say === "task" ? messages[0] : undefined) : undefined
 	const task = messages.length > 0 ? messages[0] : undefined // leaving this less safe version here since if the first message is not a task, then the extension is in a bad state and needs to be debugged (see ClaudeDev.abort)
@@ -32,6 +35,9 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 	const [inputValue, setInputValue] = useState("")
 	const textAreaRef = useRef<HTMLTextAreaElement>(null)
 	const [textAreaDisabled, setTextAreaDisabled] = useState(false)
+	const [isTextAreaFocused, setIsTextAreaFocused] = useState(false)
+	const [selectedImages, setSelectedImages] = useState<string[]>([])
+	const [thumbnailsHeight, setThumbnailsHeight] = useState(0)
 
 	// we need to hold on to the ask because useEffect > lastMessage will always let us know when an ask comes in and handle it, but by the time handleMessage is called, the last message might not be the ask anymore (it could be a say that followed)
 	const [claudeAsk, setClaudeAsk] = useState<ClaudeAsk | undefined>(undefined)
@@ -39,11 +45,8 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 	const [enableButtons, setEnableButtons] = useState<boolean>(false)
 	const [primaryButtonText, setPrimaryButtonText] = useState<string | undefined>(undefined)
 	const [secondaryButtonText, setSecondaryButtonText] = useState<string | undefined>(undefined)
-
 	const [syntaxHighlighterStyle, setSyntaxHighlighterStyle] = useState(vsDarkPlus)
-
 	const virtuosoRef = useRef<VirtuosoHandle>(null)
-
 	const [expandedRows, setExpandedRows] = useState<Record<number, boolean>>({})
 
 	const toggleRowExpansion = (ts: number) => {
@@ -136,6 +139,7 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 								// if the last ask is a command_output, and we receive an api_req_started, then that means the command has finished and we don't need input from the user anymore (in every other case, the user has to interact with input field or buttons to continue, which does the following automatically)
 								setInputValue("")
 								setTextAreaDisabled(true)
+								setSelectedImages([])
 								setClaudeAsk(undefined)
 								setEnableButtons(false)
 							}
@@ -175,7 +179,7 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 		const text = inputValue.trim()
 		if (text) {
 			if (messages.length === 0) {
-				vscode.postMessage({ type: "newTask", text })
+				vscode.postMessage({ type: "newTask", text, images: selectedImages })
 			} else if (claudeAsk) {
 				switch (claudeAsk) {
 					case "followup":
@@ -183,13 +187,19 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 					case "command": // user can provide feedback to a tool or command use
 					case "command_output": // user can send input to command stdin
 					case "completion_result": // if this happens then the user has feedback for the completion result
-						vscode.postMessage({ type: "askResponse", askResponse: "textResponse", text })
+						vscode.postMessage({
+							type: "askResponse",
+							askResponse: "messageResponse",
+							text,
+							images: selectedImages,
+						})
 						break
 					// there is no other case that a textfield should be enabled
 				}
 			}
 			setInputValue("")
 			setTextAreaDisabled(true)
+			setSelectedImages([])
 			setClaudeAsk(undefined)
 			setEnableButtons(false)
 			// setPrimaryButtonText(undefined)
@@ -255,6 +265,65 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 		vscode.postMessage({ type: "clearTask" })
 	}
 
+	const selectImages = () => {
+		vscode.postMessage({ type: "selectImages" })
+	}
+
+	const handlePaste = async (e: React.ClipboardEvent) => {
+		const items = e.clipboardData.items
+		const acceptedTypes = ["png", "jpg", "jpeg", "gif", "webp", "tiff", "avif", "svg"]
+		const imageItems = Array.from(items).filter((item) => {
+			const [type, subtype] = item.type.split("/")
+			return type === "image" && acceptedTypes.includes(subtype)
+		})
+		if (imageItems.length > 0) {
+			e.preventDefault()
+			const imagePromises = imageItems.map((item) => {
+				return new Promise<string | null>((resolve) => {
+					const blob = item.getAsFile()
+					if (!blob) {
+						resolve(null)
+						return
+					}
+					const reader = new FileReader()
+					reader.onloadend = () => {
+						if (reader.error) {
+							console.error("Error reading file:", reader.error)
+							resolve(null)
+						} else {
+							const result = reader.result
+							resolve(typeof result === "string" ? result : null)
+						}
+					}
+					reader.readAsDataURL(blob)
+				})
+			})
+			const imageDataArray = await Promise.all(imagePromises)
+			const base64Strings = imageDataArray
+				.filter((dataUrl): dataUrl is string => dataUrl !== null)
+				.map((dataUrl) => dataUrl.split(",")[1]) // strip the mime type prefix, sharp doesn't need it
+			if (base64Strings.length > 0) {
+				// Send base64 encoded image data to the extension
+				vscode.postMessage({
+					type: "processPastedImages",
+					images: base64Strings,
+				})
+			} else {
+				console.warn("No valid images were processed")
+			}
+		}
+	}
+
+	useEffect(() => {
+		if (selectedImages.length === 0) {
+			setThumbnailsHeight(0)
+		}
+	}, [selectedImages])
+
+	const handleThumbnailsHeightChange = useCallback((height: number) => {
+		setThumbnailsHeight(height)
+	}, [])
+
 	const handleMessage = useCallback(
 		(e: MessageEvent) => {
 			const message: ExtensionMessage = e.data
@@ -268,6 +337,14 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 							break
 					}
 					break
+				case "selectedImages":
+					const newImages = message.images ?? []
+					if (newImages.length > 0) {
+						setSelectedImages((prevImages) =>
+							[...prevImages, ...newImages].slice(0, MAX_IMAGES_PER_MESSAGE)
+						)
+					}
+					break
 			}
 			// textAreaRef.current is not explicitly required here since react gaurantees that ref will be stable across re-renders, and we're not using its value but its reference.
 		},
@@ -324,11 +401,12 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 		return () => clearTimeout(timer)
 	}, [visibleMessages])
 
-	const placeholderText = useMemo(() => {
+	const [placeholderText, isInputPipingToStdin] = useMemo(() => {
 		if (messages.at(-1)?.ask === "command_output") {
-			return "Type input to command stdin..."
+			return ["Type input to command stdin...", true]
 		}
-		return task ? "Type a message..." : "Type your task here..."
+		const text = task ? "Type a message..." : "Type your task here..."
+		return [text, false]
 	}, [task, messages])
 
 	return (
@@ -345,7 +423,7 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 			}}>
 			{task ? (
 				<TaskHeader
-					taskText={task.text || ""}
+					task={task}
 					tokensIn={apiMetrics.totalTokensIn}
 					tokensOut={apiMetrics.totalTokensOut}
 					totalCost={apiMetrics.totalCost}
@@ -427,13 +505,33 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 					</VSCodeButton>
 				)}
 			</div>
-			<div style={{ padding: "10px 15px", opacity: textAreaDisabled ? 0.5 : 1, position: "relative" }}>
+			<div
+				style={{
+					padding: "10px 15px",
+					opacity: textAreaDisabled ? 0.5 : 1,
+					position: "relative",
+					display: "flex",
+				}}>
+				{!isTextAreaFocused && (
+					<div
+						style={{
+							position: "absolute",
+							inset: "10px 15px",
+							border: "1px solid var(--vscode-input-border)",
+							borderRadius: 2,
+							pointerEvents: "none",
+						}}
+					/>
+				)}
 				<DynamicTextArea
 					ref={textAreaRef}
 					value={inputValue}
 					disabled={textAreaDisabled}
 					onChange={(e) => setInputValue(e.target.value)}
 					onKeyDown={handleKeyDown}
+					onFocus={() => setIsTextAreaFocused(true)}
+					onBlur={() => setIsTextAreaFocused(false)}
+					onPaste={handlePaste}
 					onHeightChange={() =>
 						//virtuosoRef.current?.scrollToIndex({ index: "LAST", align: "end", behavior: "auto" })
 						virtuosoRef.current?.scrollTo({ top: Number.MAX_SAFE_INTEGER, behavior: "auto" })
@@ -446,32 +544,66 @@ const ChatView = ({ messages, isHidden, vscodeThemeName, showAnnouncement, hideA
 						boxSizing: "border-box",
 						backgroundColor: "var(--vscode-input-background)",
 						color: "var(--vscode-input-foreground)",
-						border: "1px solid var(--vscode-input-border)",
+						//border: "1px solid var(--vscode-input-border)",
 						borderRadius: 2,
 						fontFamily: "var(--vscode-font-family)",
 						fontSize: "var(--vscode-editor-font-size)",
 						lineHeight: "var(--vscode-editor-line-height)",
 						resize: "none",
 						overflow: "hidden",
-						padding: "8px 36px 8px 8px",
+						// Since we have maxRows, when text is long enough it starts to overflow the bottom padding, appearing behind the thumbnails. To fix this, we use a transparent border to push the text up instead. (https://stackoverflow.com/questions/42631947/maintaining-a-padding-inside-of-text-area/52538410#52538410)
+						borderTop: "9px solid transparent",
+						borderBottom: `${thumbnailsHeight + 9}px solid transparent`,
+						borderRight: "54px solid transparent",
+						borderLeft: "9px solid transparent",
+						// Instead of using boxShadow, we use a div with a border to better replicate the behavior when the textarea is focused
+						// boxShadow: "0px 0px 0px 1px var(--vscode-input-border)",
+						padding: 0,
 						cursor: textAreaDisabled ? "not-allowed" : undefined,
+						flex: 1,
 					}}
 				/>
+				{selectedImages.length > 0 && (
+					<Thumbnails
+						images={selectedImages}
+						setImages={setSelectedImages}
+						onHeightChange={handleThumbnailsHeightChange}
+						style={{
+							position: "absolute",
+							paddingTop: 4,
+							bottom: 14,
+							left: 22,
+							right: 67, // (54 + 9) + 4 extra padding
+						}}
+					/>
+				)}
 				<div
 					style={{
 						position: "absolute",
 						right: 20,
+						bottom: 14, // Align with the bottom padding of the container
 						display: "flex",
-						alignItems: "center",
-						top: 0,
-						bottom: 1.5,
+						alignItems: "flex-end",
+						height: "calc(100% - 20px)", // Full height minus top and bottom padding
 					}}>
+					<VSCodeButton
+						disabled={
+							textAreaDisabled || selectedImages.length >= MAX_IMAGES_PER_MESSAGE || isInputPipingToStdin
+						}
+						appearance="icon"
+						aria-label="Attach Images"
+						onClick={selectImages}
+						style={{ marginRight: "4px" }}>
+						<span
+							className="codicon codicon-device-camera"
+							style={{ fontSize: 18, marginLeft: -2, marginBottom: 1 }}></span>
+					</VSCodeButton>
 					<VSCodeButton
 						disabled={textAreaDisabled}
 						appearance="icon"
 						aria-label="Send Message"
 						onClick={handleSendMessage}>
-						<span className="codicon codicon-send"></span>
+						<span className="codicon codicon-send" style={{ marginBottom: -1 }}></span>
 					</VSCodeButton>
 				</div>
 			</div>