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import React, { useState, useRef, useEffect } from "react";
import type { Message } from "../types";
interface ChatPaneProps {
messages: Message[];
onSend: (message: string) => void;
isLoading: boolean;
disabled: boolean;
placeholder: string;
collapsed: boolean;
chatWidth: number;
onToggleCollapse: () => void;
activityStatus?: string | null;
onCancel?: () => void;
}
export function ChatPane({
messages,
onSend,
isLoading,
disabled,
placeholder,
collapsed,
chatWidth,
onToggleCollapse,
activityStatus,
onCancel,
}: ChatPaneProps) {
const [input, setInput] = useState("");
const messagesEndRef = useRef<HTMLDivElement>(null);
useEffect(() => {
messagesEndRef.current?.scrollIntoView({ behavior: "smooth" });
}, [messages]);
const handleSend = () => {
if (!input.trim() || isLoading || disabled) return;
onSend(input.trim());
setInput("");
};
return (
<div
className="chat-pane"
style={{ width: collapsed ? 28 : chatWidth }}
>
<div className="chat-header">
<button className="chat-collapse-btn" onClick={onToggleCollapse}>
{collapsed ? "◀" : "▷"}
</button>
{!collapsed && <span>Chat</span>}
</div>
{!collapsed && (
<>
<div className="chat-messages">
{messages.map((msg) => (
<div key={msg.id} className={`message ${msg.role}`}>
<div className="message-content">{msg.content}</div>
</div>
))}
{isLoading && (
<div className="message assistant loading">
<div className="message-content">
<span>{activityStatus ?? "Thinking…"}</span>
{onCancel && (
<button
className="loading-cancel-x"
onClick={onCancel}
title="Cancel (Esc)"
>
×
</button>
)}
</div>
</div>
)}
<div ref={messagesEndRef} />
</div>
<div className="chat-input">
<input
type="text"
value={input}
onChange={(e) => setInput(e.target.value)}
onKeyDown={(e) =>
e.key === "Enter" && !e.shiftKey && handleSend()
}
placeholder={placeholder}
disabled={disabled || isLoading}
/>
<button
onClick={handleSend}
disabled={disabled || isLoading || !input.trim()}
>
Send
</button>
</div>
</>
)}
</div>
);
}
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