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feat(app,extension): add auto-expanding chat input #71

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Merged
comppaz merged 1 commit into from
Dec 19, 2025
Merged

feat(app,extension): add auto-expanding chat input #71

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6 changes: 6 additions & 0 deletions .changeset/auto-expand-chat-input.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
---
"think-app": patch
"think-extension": patch
---

Add auto-expanding chat input that grows as users type
24 changes: 19 additions & 5 deletions app/src/components/ChatInput.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ export function ChatInput({
placeholder = "Type your message...",
className,
}: ChatInputProps) {
const inputRef = useRef<HTMLInputElement>(null);
const inputRef = useRef<HTMLTextAreaElement>(null);

const handleKeyDown = (e: React.KeyboardEvent) => {
if (e.key === "Enter" && !e.shiftKey) {
Expand All @@ -29,6 +29,20 @@ export function ChatInput({
}
};

// Auto-resize textarea based on content
const adjustHeight = () => {
const textarea = inputRef.current;
if (textarea) {
textarea.style.height = "auto";
textarea.style.height = `${Math.min(textarea.scrollHeight, 200)}px`;
}
};

// Adjust height when value changes
useEffect(() => {
adjustHeight();
}, [value]);

// Auto-focus input after message submission (when loading completes)
useEffect(() => {
if (!isLoading && inputRef.current) {
Expand All @@ -39,7 +53,7 @@ export function ChatInput({
return (
<div
className={cn(
"relative flex items-center gap-2 p-2 rounded-full",
"relative flex items-end gap-2 p-2 rounded-2xl",
// Glassmorphism
"bg-white/70 dark:bg-white/5 backdrop-blur-xl",
"border border-white/60 dark:border-white/10",
Expand All @@ -48,16 +62,16 @@ export function ChatInput({
className
)}
>
<input
<textarea
ref={inputRef}
type="text"
value={value}
onChange={(e) => onChange(e.target.value)}
onKeyDown={handleKeyDown}
placeholder={placeholder}
disabled={isLoading}
rows={1}
className={cn(
"flex-1 bg-transparent px-4 py-2 text-base",
"flex-1 bg-transparent px-4 py-2 text-base min-h-[44px] max-h-[200px] resize-none",
"placeholder:text-muted-foreground/60",
"focus:outline-none",
"disabled:opacity-50"
Expand Down
23 changes: 18 additions & 5 deletions extension/src/sidebar/ChatSidebar.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ export function ChatSidebar({ pageContent, pageUrl, pageTitle, onClose }: ChatSi
// Follow-up suggestions from LLM
const [followupSuggestions, setFollowupSuggestions] = useState<string[]>([]);
const messagesEndRef = useRef<HTMLDivElement>(null);
const inputRef = useRef<HTMLInputElement>(null);
const inputRef = useRef<HTMLTextAreaElement>(null);

const scrollToBottom = () => {
messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
Expand All @@ -101,6 +101,19 @@ export function ChatSidebar({ pageContent, pageUrl, pageTitle, onClose }: ChatSi
inputRef.current?.focus();
}, []);

// Auto-resize textarea based on content
const adjustHeight = () => {
const textarea = inputRef.current;
if (textarea) {
textarea.style.height = 'auto';
textarea.style.height = `${Math.min(textarea.scrollHeight, 200)}px`;
}
};

useEffect(() => {
adjustHeight();
}, [input]);

const sendMessage = async (messageText?: string) => {
const userMessage = (messageText || input).trim();
if (!userMessage || loading) return;
Expand Down Expand Up @@ -420,16 +433,16 @@ export function ChatSidebar({ pageContent, pageUrl, pageTitle, onClose }: ChatSi

{/* Input */}
<div className="p-3 border-t border-border">
<div className="relative flex items-center gap-2 p-2 rounded-full bg-white/70 dark:bg-white/5 backdrop-blur-xl border border-white/60 dark:border-white/10 shadow-lg shadow-black/5 dark:shadow-black/20">
<input
<div className="relative flex items-end gap-2 p-2 rounded-2xl bg-white/70 dark:bg-white/5 backdrop-blur-xl border border-white/60 dark:border-white/10 shadow-lg shadow-black/5 dark:shadow-black/20">
<textarea
ref={inputRef}
type="text"
value={input}
onChange={(e) => setInput(e.target.value)}
onKeyDown={handleKeyDown}
placeholder="Ask about this page..."
disabled={loading}
className="flex-1 bg-transparent px-4 py-2 text-base placeholder:text-muted-foreground/60 focus:outline-none disabled:opacity-50"
rows={1}
className="flex-1 bg-transparent px-4 py-2 text-base min-h-[44px] max-h-[200px] resize-none placeholder:text-muted-foreground/60 focus:outline-none disabled:opacity-50"
/>
<Button
size="icon"
Expand Down