feat(ui): canvas-first redesign with a self-hosted draw.io

The canvas now fills the window and the chat floats on its right. draw.io is
served from our own origin (public/drawio, downloaded at build time and
checked against the release's SHA-256), so the app can drive the editor
directly:

- every AI change becomes a version card with a thumbnail; compare, restore
  or undo it, and Ctrl+Z on the canvas takes an AI change back in one step
- shapes the AI just changed are highlighted on the canvas
- selected shapes appear as a chip and are sent to the model
- the app's own canvas toolbar, shape library and page tabs replace
  draw.io's chrome
- new start screen, session rename and switcher, open .drawio files
- settings split into Models & keys, Appearance, Advanced and About
- phones switch between canvas and chat
- dark mode keeps the diagram on a white sheet and no longer flashes

With an external draw.io (NEXT_PUBLIC_DRAWIO_BASE_URL) the app falls back to
draw.io's own toolbar and the features above that need same origin are off.

The chat logic moved from the 1500-line chat panel into a chat engine plus
small UI components; zustand holds canvas, versions, settings and UI state.
This commit is contained in:
dayuan.jiang
2026-10-06 22:01:09 +09:00
parent 18a20aa1ca
commit 366d9ee4ff
106 changed files with 12453 additions and 6879 deletions
-360
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@@ -1,360 +0,0 @@
"use client"
import {
ChevronDown,
ChevronUp,
MessageSquare,
Search,
Trash2,
X,
} from "lucide-react"
import { useEffect, useState } from "react"
import { TemplatePanel } from "@/components/chat/TemplatePanel"
import ExamplePanel from "@/components/chat-example-panel"
import Image from "@/components/image-with-basepath"
import {
AlertDialog,
AlertDialogAction,
AlertDialogCancel,
AlertDialogContent,
AlertDialogDescription,
AlertDialogFooter,
AlertDialogHeader,
AlertDialogTitle,
} from "@/components/ui/alert-dialog"
import { STORAGE_KEYS } from "@/lib/storage"
import type { Template } from "@/lib/template-storage"
interface SessionMetadata {
id: string
title: string
updatedAt: number
thumbnailDataUrl?: string
}
interface ChatLobbyProps {
sessions: SessionMetadata[]
onSelectSession: (id: string) => void
onDeleteSession?: (id: string) => void
setInput: (input: string) => void
setFiles: (files: File[]) => void
onSendTemplate?: (template: Template) => void
currentInput?: string
dict: {
sessionHistory?: {
recentChats?: string
searchPlaceholder?: string
noResults?: string
justNow?: string
deleteTitle?: string
deleteDescription?: string
}
templates?: {
title?: string
myTemplates?: string
}
examples?: {
quickExamples?: string
}
common: {
delete: string
cancel: string
}
}
}
// Helper to format session date
function formatSessionDate(
timestamp: number,
dict?: { justNow?: string },
): string {
const date = new Date(timestamp)
const now = new Date()
const diffMs = now.getTime() - date.getTime()
const diffMins = Math.floor(diffMs / (1000 * 60))
const diffHours = Math.floor(diffMs / (1000 * 60 * 60))
if (diffMins < 1) return dict?.justNow || "Just now"
if (diffMins < 60) return `${diffMins}m ago`
if (diffHours < 24) return `${diffHours}h ago`
return date.toLocaleDateString(undefined, {
month: "short",
day: "numeric",
})
}
function getPanelVisibility() {
if (typeof window === "undefined")
return { recentChats: true, myTemplates: true, quickExamples: true }
return {
recentChats:
localStorage.getItem(STORAGE_KEYS.showRecentChats) !== "false",
myTemplates:
localStorage.getItem(STORAGE_KEYS.showMyTemplates) !== "false",
quickExamples:
localStorage.getItem(STORAGE_KEYS.showQuickExamples) !== "false",
}
}
export function ChatLobby({
sessions,
onSelectSession,
onDeleteSession,
setInput,
setFiles,
onSendTemplate,
currentInput = "",
dict,
}: ChatLobbyProps) {
const [templatesExpanded, setTemplatesExpanded] = useState(true)
const [examplesExpanded, setExamplesExpanded] = useState(true)
const [panelVisibility, setPanelVisibility] = useState(getPanelVisibility)
const [deleteDialogOpen, setDeleteDialogOpen] = useState(false)
const [sessionToDelete, setSessionToDelete] = useState<string | null>(null)
const [searchQuery, setSearchQuery] = useState("")
// Listen for panel visibility changes from settings
useEffect(() => {
const handler = () => setPanelVisibility(getPanelVisibility())
window.addEventListener("panelVisibilityChange", handler)
return () =>
window.removeEventListener("panelVisibilityChange", handler)
}, [])
const hasHistory = sessions.length > 0
if (!hasHistory) {
if (!panelVisibility.myTemplates && !panelVisibility.quickExamples) {
return null
}
return (
<div className="animate-fade-in">
{panelVisibility.myTemplates && (
<TemplatePanel
setInput={setInput}
onSendTemplate={onSendTemplate}
currentInput={currentInput}
/>
)}
{panelVisibility.quickExamples && (
<div className={panelVisibility.myTemplates ? "mt-6" : ""}>
<ExamplePanel setInput={setInput} setFiles={setFiles} />
</div>
)}
</div>
)
}
// Show history + collapsible examples when there are sessions
return (
<div className="py-6 px-2 animate-fade-in">
{/* Recent Chats Section */}
{panelVisibility.recentChats && (
<div className="mb-6">
<p className="text-xs font-medium text-muted-foreground uppercase tracking-wider px-1 mb-3">
{dict.sessionHistory?.recentChats || "Recent Chats"}
</p>
{/* Search Bar */}
<div className="relative mb-3">
<Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
<input
type="text"
placeholder={
dict.sessionHistory?.searchPlaceholder ||
"Search chats..."
}
value={searchQuery}
onChange={(e) => setSearchQuery(e.target.value)}
className="w-full pl-9 pr-3 py-2 text-sm rounded-lg border border-border/60 bg-background focus:outline-none focus:ring-2 focus:ring-primary/30 focus:border-primary/50 transition-all"
/>
{searchQuery && (
<button
type="button"
onClick={() => setSearchQuery("")}
className="absolute right-2 top-1/2 -translate-y-1/2 p-1 rounded hover:bg-muted transition-colors"
>
<X className="w-3 h-3 text-muted-foreground" />
</button>
)}
</div>
<div className="space-y-2">
{sessions
.filter((session) =>
session.title
.toLowerCase()
.includes(searchQuery.toLowerCase()),
)
.map((session) => (
// biome-ignore lint/a11y/useSemanticElements: Cannot use button - has nested delete button which causes hydration error
<div
key={session.id}
role="button"
tabIndex={0}
className="group w-full flex items-center gap-3 p-3 rounded-xl border border-border/60 bg-card hover:bg-accent/50 hover:border-primary/30 transition-all duration-200 cursor-pointer text-left"
onClick={() => onSelectSession(session.id)}
onKeyDown={(e) => {
// Ignore keys bubbling up from the delete button
if (e.target !== e.currentTarget) return
if (
e.key === "Enter" ||
e.key === " "
) {
e.preventDefault()
onSelectSession(session.id)
}
}}
>
{session.thumbnailDataUrl ? (
<div className="w-12 h-12 shrink-0 rounded-lg border bg-white overflow-hidden">
<Image
src={session.thumbnailDataUrl}
alt=""
width={48}
height={48}
className="object-contain w-full h-full"
/>
</div>
) : (
<div className="w-12 h-12 shrink-0 rounded-lg bg-primary/10 flex items-center justify-center">
<MessageSquare className="w-5 h-5 text-primary" />
</div>
)}
<div className="min-w-0 flex-1">
<div className="text-sm font-medium truncate">
{session.title}
</div>
<div className="text-xs text-muted-foreground">
{formatSessionDate(
session.updatedAt,
dict.sessionHistory,
)}
</div>
</div>
{onDeleteSession && (
<button
type="button"
onClick={(e) => {
e.stopPropagation()
setSessionToDelete(session.id)
setDeleteDialogOpen(true)
}}
className="p-1.5 rounded-lg opacity-0 group-hover:opacity-100 text-muted-foreground hover:text-destructive hover:bg-destructive/10 transition-all"
title={dict.common.delete}
>
<Trash2 className="w-4 h-4" />
</button>
)}
</div>
))}
{sessions.filter((s) =>
s.title
.toLowerCase()
.includes(searchQuery.toLowerCase()),
).length === 0 &&
searchQuery && (
<p className="text-sm text-muted-foreground text-center py-4">
{dict.sessionHistory?.noResults ||
"No chats found"}
</p>
)}
</div>
</div>
)}
{/* Collapsible My Templates Section */}
{panelVisibility.myTemplates && (
<div className="border-t border-border/50 pt-4">
<button
type="button"
onClick={() => setTemplatesExpanded(!templatesExpanded)}
className="w-full flex items-center justify-between px-1 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider hover:text-foreground transition-colors"
>
<span>
{dict.templates?.myTemplates || "My Templates"}
</span>
{templatesExpanded ? (
<ChevronUp className="w-4 h-4" />
) : (
<ChevronDown className="w-4 h-4" />
)}
</button>
{templatesExpanded && (
<div className="mt-2">
<TemplatePanel
setInput={setInput}
onSendTemplate={onSendTemplate}
currentInput={currentInput}
/>
</div>
)}
</div>
)}
{/* Collapsible Quick Examples Section */}
{panelVisibility.quickExamples && (
<div className="border-t border-border/50 pt-4">
<button
type="button"
onClick={() => setExamplesExpanded(!examplesExpanded)}
className="w-full flex items-center justify-between px-1 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider hover:text-foreground transition-colors"
>
<span>
{dict.examples?.quickExamples || "Quick Examples"}
</span>
{examplesExpanded ? (
<ChevronUp className="w-4 h-4" />
) : (
<ChevronDown className="w-4 h-4" />
)}
</button>
{examplesExpanded && (
<div className="mt-2">
<ExamplePanel
setInput={setInput}
setFiles={setFiles}
minimal
/>
</div>
)}
</div>
)}
{/* Delete Confirmation Dialog */}
<AlertDialog
open={deleteDialogOpen}
onOpenChange={setDeleteDialogOpen}
>
<AlertDialogContent className="max-w-sm">
<AlertDialogHeader>
<AlertDialogTitle>
{dict.sessionHistory?.deleteTitle ||
"Delete this chat?"}
</AlertDialogTitle>
<AlertDialogDescription>
{dict.sessionHistory?.deleteDescription ||
"This will permanently delete this chat session and its diagram. This action cannot be undone."}
</AlertDialogDescription>
</AlertDialogHeader>
<AlertDialogFooter>
<AlertDialogCancel>
{dict.common.cancel}
</AlertDialogCancel>
<AlertDialogAction
onClick={() => {
if (sessionToDelete && onDeleteSession) {
onDeleteSession(sessionToDelete)
}
setDeleteDialogOpen(false)
setSessionToDelete(null)
}}
className="border border-red-300 bg-red-50 text-red-700 hover:bg-red-100 hover:border-red-400"
>
{dict.common.delete}
</AlertDialogAction>
</AlertDialogFooter>
</AlertDialogContent>
</AlertDialog>
</div>
)
}
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@@ -333,14 +333,6 @@ export function TemplatePanel({
if (!loading && templates.length === 0) {
return (
<div className="py-6 px-2 animate-fade-in">
<div className="text-center mb-6">
<h2 className="text-lg font-semibold text-foreground mb-2">
{dict.templates.title}
</h2>
<p className="text-sm text-muted-foreground max-w-xs mx-auto">
{dict.templates.subtitle}
</p>
</div>
<div className="flex flex-col items-center justify-center py-8 px-4">
<div className="w-16 h-16 rounded-2xl bg-primary/10 flex items-center justify-center mb-4">
<FileText className="w-8 h-8 text-primary/60" />
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"use client"
import { Check, ChevronDown, ChevronUp, Copy, Cpu } from "lucide-react"
import type { Dispatch, SetStateAction } from "react"
import { CodeBlock } from "@/components/code-block"
import { isMxCellXmlComplete } from "@/lib/utils"
import type { DiagramOperation, ToolPartLike } from "./types"
interface ToolCallCardProps {
part: ToolPartLike
expandedTools: Record<string, boolean>
setExpandedTools: Dispatch<SetStateAction<Record<string, boolean>>>
onCopy: (callId: string, text: string, isToolCall: boolean) => void
copiedToolCallId: string | null
copyFailedToolCallId: string | null
dict: {
tools: { complete: string }
chat: { copied: string; failedToCopy: string; copyResponse: string }
}
}
function OperationsDisplay({ operations }: { operations: DiagramOperation[] }) {
// Streamed or invalid input can hold anything: show only what React can
// render (an object in place of a string would crash the whole chat)
const shown = operations.filter(
(op) => typeof (op as { operation?: unknown })?.operation === "string",
)
const text = (value: unknown) => (typeof value === "string" ? value : "")
return (
<div className="space-y-3">
{shown.map((op, index) => (
<div
key={`${op.operation}-${text(op.cell_id)}-${index}`}
className="rounded-lg border border-border/50 overflow-hidden bg-background/50"
>
<div className="px-3 py-1.5 bg-muted/40 border-b border-border/30 flex items-center gap-2">
<span
className={`text-[10px] font-medium uppercase tracking-wide ${
op.operation === "delete"
? "text-red-600"
: op.operation === "add"
? "text-green-600"
: "text-blue-600"
}`}
>
{op.operation}
</span>
<span className="text-xs text-muted-foreground">
cell_id: {text(op.cell_id)}
</span>
</div>
{text(op.new_xml) && (
<div className="px-3 py-2">
<pre className="text-[11px] font-mono text-foreground/80 bg-muted/30 rounded px-2 py-1.5 overflow-x-auto whitespace-pre-wrap break-all">
{text(op.new_xml)}
</pre>
</div>
)}
</div>
))}
</div>
)
}
export function ToolCallCard({
part,
expandedTools,
setExpandedTools,
onCopy,
copiedToolCallId,
copyFailedToolCallId,
dict,
}: ToolCallCardProps) {
const callId = part.toolCallId
const { state, input, output, errorText } = part
// Default to expanded for all states (user can manually collapse if needed)
const isExpanded = expandedTools[callId] ?? true
const toolName = part.type?.replace("tool-", "")
const isCopied = copiedToolCallId === callId
const toggleExpanded = () => {
setExpandedTools((prev) => ({
...prev,
[callId]: !isExpanded,
}))
}
const getToolDisplayName = (name: string) => {
switch (name) {
case "display_diagram":
return "Generate Diagram"
case "edit_diagram":
return "Edit Diagram"
case "get_shape_library":
return "Get Shape Library"
default:
return name
}
}
// Incomplete XML means the output hit the length limit, unless the user
// stopped the generation themselves. Without an input the JSON was
// broken (the server repairs JSON cut short by the limit).
const isTruncated =
state === "output-error" &&
errorText !== "Stopped by user" &&
(toolName === "display_diagram" || toolName === "append_diagram") &&
typeof input?.xml === "string" &&
!isMxCellXmlComplete(input.xml)
const handleCopy = () => {
let textToCopy = ""
if (input && typeof input === "object") {
if (input.xml) {
textToCopy = input.xml
} else if (input.operations && Array.isArray(input.operations)) {
textToCopy = JSON.stringify(input.operations, null, 2)
} else if (Object.keys(input).length > 0) {
textToCopy = JSON.stringify(input, null, 2)
}
}
if (
output &&
toolName === "get_shape_library" &&
typeof output === "string"
) {
textToCopy = output
}
if (textToCopy) {
onCopy(callId, textToCopy, true)
}
}
return (
<div className="my-3 rounded-xl border border-border/60 bg-muted/30 overflow-hidden">
<div className="flex items-center justify-between px-4 py-3 bg-muted/50">
<div className="flex items-center gap-2">
<div className="w-6 h-6 rounded-md bg-primary/10 flex items-center justify-center">
<Cpu className="w-3.5 h-3.5 text-primary" />
</div>
<span className="text-sm font-medium text-foreground/80">
{getToolDisplayName(toolName)}
</span>
</div>
<div className="flex items-center gap-2">
{state === "input-streaming" && (
<div className="h-4 w-4 border-2 border-primary border-t-transparent rounded-full animate-spin" />
)}
{state === "output-available" && (
<>
<span className="text-xs font-medium text-green-600 bg-green-50 px-2 py-0.5 rounded-full">
{dict.tools.complete}
</span>
{isExpanded && (
<button
type="button"
onClick={handleCopy}
className="p-1 rounded hover:bg-muted transition-colors"
title={
copiedToolCallId === callId
? dict.chat.copied
: copyFailedToolCallId === callId
? dict.chat.failedToCopy
: dict.chat.copyResponse
}
>
{isCopied ? (
<Check className="w-4 h-4 text-green-600" />
) : (
<Copy className="w-4 h-4 text-muted-foreground" />
)}
</button>
)}
</>
)}
{state === "output-error" &&
(isTruncated ? (
<span className="text-xs font-medium text-yellow-600 bg-yellow-50 px-2 py-0.5 rounded-full">
Truncated
</span>
) : (
<span className="text-xs font-medium text-red-600 bg-red-50 px-2 py-0.5 rounded-full">
Error
</span>
))}
{input && Object.keys(input).length > 0 && (
<button
type="button"
onClick={toggleExpanded}
className="p-1 rounded hover:bg-muted transition-colors"
>
{isExpanded ? (
<ChevronUp className="w-4 h-4 text-muted-foreground" />
) : (
<ChevronDown className="w-4 h-4 text-muted-foreground" />
)}
</button>
)}
</div>
</div>
{input && isExpanded && (
<div className="px-4 py-3 border-t border-border/40 bg-muted/20">
{typeof input === "object" && input.xml ? (
state === "input-streaming" ||
state === "input-available" ? (
<pre
className="text-[11px] leading-relaxed overflow-x-auto overflow-y-auto max-h-48 scrollbar-thin break-all whitespace-pre-wrap"
style={{
fontFamily:
"var(--font-mono), ui-monospace, monospace",
margin: 0,
padding: 0,
}}
>
{input.xml}
</pre>
) : (
<CodeBlock code={input.xml} language="xml" />
)
) : typeof input === "object" &&
input.operations &&
Array.isArray(input.operations) ? (
<OperationsDisplay operations={input.operations} />
) : typeof input === "object" &&
Object.keys(input).length > 0 ? (
<CodeBlock
code={JSON.stringify(input, null, 2)}
language="json"
/>
) : null}
</div>
)}
{/* AI SDK stores tool errors in errorText */}
{state === "output-error" && (errorText || output) && (
<div
className={`px-4 py-3 border-t border-border/40 text-sm whitespace-pre-wrap break-words ${isTruncated ? "text-yellow-600" : "text-red-600"}`}
>
{isTruncated
? "Output truncated due to length limits. Try a simpler request or increase Max Output Tokens in Settings."
: (errorText ?? output)}
</div>
)}
{/* Show get_shape_library output on success */}
{output &&
toolName === "get_shape_library" &&
state === "output-available" &&
isExpanded && (
<div className="px-4 py-3 border-t border-border/40">
<div className="text-xs text-muted-foreground mb-2">
Library loaded (
{typeof output === "string" ? output.length : 0}{" "}
chars)
</div>
<pre className="text-xs bg-muted/50 p-2 rounded-md overflow-auto max-h-32 whitespace-pre-wrap">
{typeof output === "string"
? output.substring(0, 800) +
(output.length > 800 ? "\n..." : "")
: String(output)}
</pre>
</div>
)}
</div>
)
}
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@@ -0,0 +1,77 @@
import { MAX_FILES, MAX_FILE_SIZE as MAX_IMAGE_SIZE } from "@/lib/chat-helpers"
import { formatMessage } from "@/lib/i18n/utils"
import { isPdfFile, isTextFile } from "@/lib/pdf-utils"
// Image formats every supported model provider accepts (SVG is read as text)
const SUPPORTED_IMAGE_TYPES = [
"image/png",
"image/jpeg",
"image/gif",
"image/webp",
]
/** Accept list for the attachment picker */
export const ATTACHMENT_ACCEPT =
"image/png,image/jpeg,image/gif,image/webp,.svg,.pdf,application/pdf,text/*,.md,.markdown,.json,.csv,.xml,.yaml,.yml,.toml"
function isValidFileType(file: File): boolean {
return (
SUPPORTED_IMAGE_TYPES.includes(file.type) ||
isPdfFile(file) ||
isTextFile(file)
)
}
function formatFileSize(bytes: number): string {
const mb = bytes / 1024 / 1024
if (mb < 0.01) return `${(bytes / 1024).toFixed(0)}KB`
return `${mb.toFixed(2)}MB`
}
/** Keep the files that can be attached; describe the rest as errors */
export function validateFiles(
newFiles: File[],
existingCount: number,
dict: any,
): { validFiles: File[]; errors: string[] } {
const errors: string[] = []
const validFiles: File[] = []
const availableSlots = MAX_FILES - existingCount
if (availableSlots <= 0) {
errors.push(formatMessage(dict.errors.maxFiles, { max: MAX_FILES }))
return { validFiles, errors }
}
for (const file of newFiles) {
if (validFiles.length >= availableSlots) {
errors.push(
formatMessage(dict.errors.onlyMoreAllowed, {
slots: availableSlots,
}),
)
break
}
if (!isValidFileType(file)) {
errors.push(
formatMessage(dict.errors.unsupportedType, { name: file.name }),
)
continue
}
// PDFs and text files are extracted in the browser, so only images
// have a size limit
const isExtractedFile = isPdfFile(file) || isTextFile(file)
if (!isExtractedFile && file.size > MAX_IMAGE_SIZE) {
errors.push(
formatMessage(dict.errors.fileExceeds, {
name: file.name,
size: formatFileSize(file.size),
max: MAX_IMAGE_SIZE / 1024 / 1024,
}),
)
} else {
validFiles.push(file)
}
}
return { validFiles, errors }
}
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import {
ChevronDown,
Download,
MessageSquareDashed,
PanelRightClose,
Settings2,
SquarePen,
} from "lucide-react"
import { useRef } from "react"
import { DevXmlSimulator } from "@/components/dev-xml-simulator"
import { BrandMark } from "@/components/workspace/brand-mark"
import { IconButton } from "@/components/workspace/icon-button"
import { useDiagram } from "@/contexts/diagram-context"
import { useDictionary } from "@/hooks/use-dictionary"
import { usePanelWidth } from "@/hooks/use-panel-width"
import { modKey } from "@/lib/platform"
import { cn } from "@/lib/utils"
import { useCanvasStore } from "@/stores/canvas-store"
import {
PANEL_MAX_WIDTH,
PANEL_MIN_WIDTH,
useSettingsStore,
} from "@/stores/settings-store"
import { useUiStore } from "@/stores/ui-store"
import { useChatEngine } from "./chat-engine"
import { Composer } from "./composer"
import { MessageList } from "./message-list"
import { SessionMenu, useSessionTitle } from "./session-menu"
import { VersionStrip } from "./version-strip"
const DEBUG = process.env.NODE_ENV === "development"
/** Drag handle on the panel's left edge (the panel sits on the right) */
function ResizeHandle() {
const panelWidth = usePanelWidth()
const setPanelWidth = useSettingsStore((s) => s.setPanelWidth)
const startRef = useRef<{ x: number; width: number } | null>(null)
return (
// biome-ignore lint/a11y/useSemanticElements: a draggable handle, not a divider line
<div
role="separator"
aria-orientation="vertical"
aria-valuenow={panelWidth}
aria-valuemin={PANEL_MIN_WIDTH}
aria-valuemax={PANEL_MAX_WIDTH}
tabIndex={-1}
className="absolute top-4 -left-1.5 bottom-4 z-10 w-3 cursor-col-resize after:absolute after:inset-y-0 after:left-1/2 after:w-0.5 after:-translate-x-1/2 after:rounded-full after:bg-foreground/0 after:transition-colors hover:after:bg-foreground/15"
onPointerDown={(e) => {
e.preventDefault()
const panel = e.currentTarget.parentElement
startRef.current = {
x: e.clientX,
width: panel?.getBoundingClientRect().width ?? 384,
}
e.currentTarget.setPointerCapture(e.pointerId)
}}
onPointerMove={(e) => {
const start = startRef.current
if (!start) return
// Dragging left widens the panel
setPanelWidth(start.width - (e.clientX - start.x))
}}
onPointerUp={(e) => {
startRef.current = null
e.currentTarget.releasePointerCapture(e.pointerId)
}}
/>
)
}
function EmptyThread() {
const dict = useDictionary()
return (
<div className="flex h-full flex-col items-center justify-center gap-2 px-8 text-center">
<MessageSquareDashed className="size-5 text-faint" />
<p className="max-w-60 text-[13px] text-muted-foreground">
{dict.chat.emptyThread}
</p>
</div>
)
}
/** The floating chat panel: header, versions, conversation, message box */
export function ChatPanel({
mobile = false,
onOpenFile,
}: {
mobile?: boolean
onOpenFile: () => void
}) {
const dict = useDictionary()
const engine = useChatEngine()
const { loadDiagram, isDrawioReady } = useDiagram()
// An external draw.io has no app toolbar (and so no Export button there)
const hasEditor = useCanvasStore((s) => s.hasEditor)
const setSaveDialogOpen = useUiStore((s) => s.setSaveDialogOpen)
const title = useSessionTitle()
const panelWidth = usePanelWidth()
const openSettings = useUiStore((s) => s.openSettings)
const setPanelOpen = useUiStore((s) => s.setPanelOpen)
return (
<aside
className={cn(
"flex flex-col bg-card",
mobile
? "absolute inset-0"
: "absolute top-3 right-3 bottom-3 z-20 rounded-2xl shadow-float animate-panel-in",
)}
style={mobile ? undefined : { width: panelWidth }}
aria-label={dict.nav.aiChat}
data-testid="chat-panel"
>
<header className="flex h-[52px] shrink-0 items-center gap-1 pr-2 pl-3">
<BrandMark />
<SessionMenu onOpenFile={onOpenFile}>
<button
type="button"
className="ml-1 flex min-w-0 items-center gap-1 rounded-lg px-1.5 py-1 hover:bg-accent"
data-testid="session-title"
>
<span className="truncate text-[15px] font-semibold tracking-[-0.01em]">
{title}
</span>
<ChevronDown className="size-4 shrink-0 text-faint" />
</button>
</SessionMenu>
<div className="ml-auto flex items-center">
{!hasEditor && isDrawioReady && (
<IconButton
label={dict.workspace.export}
onClick={() => setSaveDialogOpen(true)}
>
<Download />
</IconButton>
)}
<IconButton
label={dict.nav.newChat}
onClick={engine.newChat}
disabled={engine.isBusy}
data-testid="new-chat-button"
>
<SquarePen />
</IconButton>
<IconButton
label={dict.nav.settings}
onClick={() => openSettings()}
data-testid="settings-button"
>
<Settings2 />
</IconButton>
{!mobile && (
<IconButton
label={dict.nav.hidePanel}
shortcut={`${modKey}B`}
onClick={() => setPanelOpen(false)}
>
<PanelRightClose />
</IconButton>
)}
</div>
</header>
<VersionStrip />
<div className="min-h-0 flex-1 overflow-y-auto scrollbar-thin">
{engine.messages.length > 0 ? <MessageList /> : <EmptyThread />}
</div>
{DEBUG && (
<DevXmlSimulator
setMessages={engine.setMessages as any}
onDisplayChart={(xml) => loadDiagram(xml, true)}
/>
)}
<div className="shrink-0 p-2.5 pt-1">
<Composer
placeholder={
engine.messages.length > 0 &&
engine.chatSelection.length === 0
? dict.chat.placeholderFollowUp
: undefined
}
/>
</div>
{!mobile && <ResizeHandle />}
</aside>
)
}
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import { ChevronLeft, ChevronRight, RotateCcw } from "lucide-react"
import { useEffect, useMemo, useState } from "react"
import {
Dialog,
DialogContent,
DialogDescription,
DialogHeader,
DialogTitle,
} from "@/components/ui/dialog"
import { useDiagram } from "@/contexts/diagram-context"
import { useDictionary } from "@/hooks/use-dictionary"
import { diffDiagrams, isSameDocument } from "@/lib/diagram-diff"
import { formatMessage } from "@/lib/i18n/utils"
import { describeChanges } from "@/lib/version-text"
import { useUiStore } from "@/stores/ui-store"
import { useVersionsStore } from "@/stores/versions-store"
import { useChatEngine } from "./chat-engine"
import { VersionThumb } from "./tool-activity"
function Sheet({
label,
svg,
}: {
label: string
svg: string | null | undefined
}) {
return (
<figure className="flex min-w-0 flex-1 flex-col gap-2">
<figcaption className="text-xs font-medium text-muted-foreground">
{label}
</figcaption>
<div className="sheet-light flex aspect-[16/10] items-center justify-center overflow-hidden rounded-xl border border-border bg-white p-2">
<VersionThumb svg={svg} className="max-h-full max-w-full" />
</div>
</figure>
)
}
/** A saved version next to the current canvas, with restore */
export function CompareDialog() {
const dict = useDictionary()
const t = dict.versions
const engine = useChatEngine()
const { getVersionSvg, chartXML } = useDiagram()
const versionId = useUiStore((s) => s.compareVersionId)
const openCompare = useUiStore((s) => s.openCompare)
const closeCompare = useUiStore((s) => s.closeCompare)
const versions = useVersionsStore((s) => s.versions)
const [currentSvg, setCurrentSvg] = useState<string | null>(null)
const index = versions.findIndex((v) => v.id === versionId)
const version = index >= 0 ? versions[index] : null
// Whether the canvas is this version, on every page
const same = useMemo(
() => !version || isSameDocument(version.xml, chartXML),
[version, chartXML],
)
// What the canvas has changed since this version on the first page
// (null: nothing there)
const changes = useMemo(() => {
if (!version || same) return null
const { summary } = diffDiagrams(version.xml, chartXML)
return Object.values(summary).some((n) => n > 0) ? summary : null
}, [version, chartXML, same])
// Picture of the canvas as it is now, taken again once an answer that
// was running is done ("" when none could be made)
useEffect(() => {
if (!versionId) return
let cancelled = false
setCurrentSvg(null)
getVersionSvg().then((svg) => {
if (!cancelled) setCurrentSvg(svg ?? "")
})
return () => {
cancelled = true
}
}, [versionId, engine.isBusy])
return (
<Dialog
open={!!version}
onOpenChange={(open) => !open && closeCompare()}
>
<DialogContent className="gap-5 sm:max-w-4xl">
<DialogHeader>
<DialogTitle>{t.compareTitle}</DialogTitle>
<DialogDescription>
{!version
? ""
: same
? t.isOnCanvas
: changes
? `${formatMessage(t.compareSince, { n: index + 1 })} ${describeChanges(changes, t)}`
: formatMessage(t.differsElsewhere, {
n: index + 1,
})}
</DialogDescription>
</DialogHeader>
{version && (
<div className="flex flex-col gap-4 sm:flex-row">
<Sheet
label={formatMessage(t.versionLabel, {
n: index + 1,
})}
svg={version.svg}
/>
<Sheet label={t.currentCanvas} svg={currentSvg} />
</div>
)}
<div className="flex items-center gap-2">
<button
type="button"
disabled={index <= 0}
onClick={() => openCompare(versions[index - 1].id)}
className="inline-flex size-8 items-center justify-center rounded-lg border border-border text-muted-foreground hover:text-foreground disabled:opacity-30"
aria-label={t.previous}
>
<ChevronLeft className="size-4" />
</button>
<button
type="button"
disabled={index < 0 || index >= versions.length - 1}
onClick={() => openCompare(versions[index + 1].id)}
className="inline-flex size-8 items-center justify-center rounded-lg border border-border text-muted-foreground hover:text-foreground disabled:opacity-30"
aria-label={t.next}
>
<ChevronRight className="size-4" />
</button>
<span className="text-xs text-muted-foreground tabular-nums">
{index + 1} / {versions.length}
</span>
<button
type="button"
disabled={!version || same || engine.isBusy}
onClick={() => {
if (!version) return
engine.restoreVersion(version.id)
closeCompare()
}}
className="ml-auto inline-flex h-9 items-center gap-1.5 rounded-lg bg-primary px-3.5 text-[13px] font-medium text-primary-foreground hover:opacity-90 disabled:opacity-40"
data-testid="compare-restore"
>
<RotateCcw className="size-4" />
{formatMessage(t.restoreVersion, { n: index + 1 })}
</button>
</div>
</DialogContent>
</Dialog>
)
}
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import {
ArrowUp,
BookMarked,
BookmarkPlus,
Globe,
Paperclip,
Plus,
Square,
SquareDashedMousePointer,
X,
} from "lucide-react"
import type React from "react"
import { useCallback, useEffect, useRef, useState } from "react"
import { toast } from "sonner"
import { TemplateCreateDialog } from "@/components/chat/TemplateCreateDialog"
import { TemplatePanel } from "@/components/chat/TemplatePanel"
import { ErrorToast } from "@/components/error-toast"
import { FilePreviewList } from "@/components/file-preview-list"
import { ModelSelector } from "@/components/model-selector"
import {
Dialog,
DialogContent,
DialogHeader,
DialogTitle,
} from "@/components/ui/dialog"
import {
Popover,
PopoverContent,
PopoverTrigger,
} from "@/components/ui/popover"
import { UrlInputDialog } from "@/components/url-input-dialog"
import { IconButton } from "@/components/workspace/icon-button"
import { useDictionary } from "@/hooks/use-dictionary"
import { formatMessage } from "@/lib/i18n/utils"
import { modKey } from "@/lib/platform"
import { extractUrlContent } from "@/lib/url-utils"
import { cn } from "@/lib/utils"
import { useSettingsStore } from "@/stores/settings-store"
import { useUiStore } from "@/stores/ui-store"
import { ATTACHMENT_ACCEPT, validateFiles } from "./attachments"
import { useChatEngine } from "./chat-engine"
function showErrorToast(message: React.ReactNode) {
toast.custom(
(t) => (
<ErrorToast message={message} onDismiss={() => toast.dismiss(t)} />
),
{ duration: 5000 },
)
}
function showValidationErrors(errors: string[], dict: any) {
if (errors.length === 0) return
if (errors.length === 1) {
showErrorToast(
<span className="text-muted-foreground">{errors[0]}</span>,
)
return
}
showErrorToast(
<div className="flex flex-col gap-1">
<span className="font-medium">
{formatMessage(dict.errors.filesRejected, {
count: errors.length,
})}
</span>
<ul className="list-inside list-disc text-xs text-muted-foreground">
{errors.slice(0, 3).map((err) => (
<li key={err}>{err}</li>
))}
{errors.length > 3 && (
<li>
{formatMessage(dict.errors.andMore, {
count: errors.length - 3,
})}
</li>
)}
</ul>
</div>,
)
}
function MenuItem({
icon,
children,
onClick,
disabled,
disabledHint,
}: {
icon: React.ReactNode
children: React.ReactNode
onClick: () => void
disabled?: boolean
/** Why the item can't be used now, shown under it while disabled */
disabledHint?: string
}) {
return (
<button
type="button"
onClick={onClick}
disabled={disabled}
className="group/item flex w-full items-start gap-2.5 rounded-md px-2.5 py-2 text-left text-[13px] hover:bg-accent disabled:pointer-events-none [&_svg]:mt-px [&_svg]:size-4 [&_svg]:text-muted-foreground"
>
<span className="contents group-disabled/item:[&>svg]:opacity-40">
{icon}
</span>
<span className="min-w-0">
<span className="block group-disabled/item:opacity-40">
{children}
</span>
{disabled && disabledHint && (
<span className="block text-xs text-muted-foreground">
{disabledHint}
</span>
)}
</span>
</button>
)
}
/**
* The message box: text, attachments, the selected shapes, the model picker
* and send/stop. `variant="hero"` is the large box on the start screen.
*/
export function Composer({
variant = "panel",
placeholder,
autoFocus = false,
}: {
variant?: "panel" | "hero"
placeholder?: string
autoFocus?: boolean
}) {
const dict = useDictionary()
const engine = useChatEngine()
const {
input,
setInput,
files,
setFiles,
pdfData,
urlData,
setUrlData,
isBusy,
error,
chatSelection,
dismissSelection,
modelConfig,
} = engine
const sendShortcut = useSettingsStore((s) => s.sendShortcut)
const openSettings = useUiStore((s) => s.openSettings)
const focusToken = useUiStore((s) => s.focusComposerToken)
const textareaRef = useRef<HTMLTextAreaElement>(null)
const fileInputRef = useRef<HTMLInputElement>(null)
const [isDragging, setIsDragging] = useState(false)
const [addOpen, setAddOpen] = useState(false)
const [templatesOpen, setTemplatesOpen] = useState(false)
const [showUrlDialog, setShowUrlDialog] = useState(false)
const [isExtractingUrl, setIsExtractingUrl] = useState(false)
const [saveTemplateOpen, setSaveTemplateOpen] = useState(false)
const isHero = variant === "hero"
// Allow a retry when the last request failed, even mid-stream. While
// the chat is being left, what is typed could not be sent.
const isDisabled = (isBusy && !error) || engine.isLeaving
const canSend =
!isDisabled && !engine.isExtractingAttachments && !!input.trim()
const adjustHeight = useCallback(() => {
const textarea = textareaRef.current
if (!textarea) return
textarea.style.height = "auto"
textarea.style.height = `${Math.min(textarea.scrollHeight, 220)}px`
}, [])
useEffect(() => {
adjustHeight()
}, [input, adjustHeight])
// Focus requests from elsewhere (new chat, "ask AI" button, ⌘/)
useEffect(() => {
if (focusToken === 0 && !autoFocus) return
const timer = setTimeout(() => textareaRef.current?.focus(), 60)
return () => clearTimeout(timer)
}, [focusToken, autoFocus])
const addFiles = (newFiles: File[]) => {
const { validFiles, errors } = validateFiles(
newFiles,
files.length,
dict,
)
showValidationErrors(errors, dict)
if (validFiles.length > 0) setFiles([...files, ...validFiles])
}
const handleKeyDown = (e: React.KeyboardEvent<HTMLTextAreaElement>) => {
// Enter that confirms an IME candidate must not send the message
if (e.nativeEvent.isComposing || e.keyCode === 229) return
const shouldSend =
sendShortcut === "enter"
? e.key === "Enter" && !e.shiftKey && !e.ctrlKey && !e.metaKey
: (e.metaKey || e.ctrlKey) && e.key === "Enter"
if (shouldSend) {
e.preventDefault()
if (canSend) engine.submit()
}
}
const handlePaste = async (e: React.ClipboardEvent) => {
if (isDisabled) return
const imageItems = Array.from(e.clipboardData.items).filter((item) =>
item.type.startsWith("image/"),
)
if (imageItems.length === 0) return
const imageFiles = imageItems
.map((item, index) => {
const file = item.getAsFile()
if (!file) return null
return new File(
[file],
`pasted-image-${Date.now()}-${index}.${file.type.split("/")[1]}`,
{ type: file.type },
)
})
.filter((f): f is File => f !== null)
addFiles(imageFiles)
}
const handleUrlExtract = async (url: string) => {
setIsExtractingUrl(true)
// Functional updates, so a removal or send made while extracting is
// not overwritten when the request finishes
try {
setUrlData((prev) =>
new Map(prev).set(url, {
url,
title: url,
content: "",
charCount: 0,
isExtracting: true,
}),
)
const data = await extractUrlContent(url)
setUrlData((prev) =>
prev.has(url) ? new Map(prev).set(url, data) : prev,
)
setShowUrlDialog(false)
} catch (err) {
setUrlData((prev) => {
const next = new Map(prev)
next.delete(url)
return next
})
showErrorToast(
<span className="text-muted-foreground">
{err instanceof Error ? err.message : dict.url.failed}
</span>,
)
} finally {
setIsExtractingUrl(false)
}
}
const selectionLabel =
chatSelection.length === 1
? formatMessage(dict.selection.one, {
label:
chatSelection[0].label ||
(chatSelection[0].isEdge
? dict.selection.connector
: dict.selection.shape),
})
: formatMessage(dict.selection.many, {
count: chatSelection.length,
})
const hasChips =
chatSelection.length > 0 || files.length > 0 || urlData.size > 0
return (
<form
id={isHero ? "hero-chat-form" : "chat-form"}
onSubmit={(e) => {
e.preventDefault()
if (canSend) engine.submit()
}}
onDragOver={(e) => {
e.preventDefault()
setIsDragging(true)
}}
onDragLeave={(e) => {
e.preventDefault()
setIsDragging(false)
}}
onDrop={(e) => {
e.preventDefault()
setIsDragging(false)
if (!isDisabled) addFiles(Array.from(e.dataTransfer.files))
}}
className={cn(
"group/composer relative w-full rounded-[14px] border border-border bg-card transition-[border-color,box-shadow] duration-150",
"focus-within:border-foreground/20 focus-within:shadow-[0_0_0_4px_var(--accent)]",
isHero && "rounded-[18px] border-transparent shadow-pop",
isDragging &&
"border-foreground/30 shadow-[0_0_0_4px_var(--marker-soft)]",
)}
>
{hasChips && (
<div className="flex flex-wrap items-center gap-1.5 px-2.5 pt-2.5">
{chatSelection.length > 0 && (
<span
className="inline-flex max-w-full items-center gap-1.5 rounded-lg bg-marker-soft py-1 pr-1 pl-2 text-xs font-medium text-marker-ink"
data-testid="selection-chip"
>
<SquareDashedMousePointer className="size-3.5 shrink-0" />
<span className="truncate">{selectionLabel}</span>
<button
type="button"
onClick={dismissSelection}
aria-label={dict.selection.remove}
className="rounded p-0.5 hover:bg-black/5 dark:hover:bg-white/10"
>
<X className="size-3" />
</button>
</span>
)}
{(files.length > 0 || urlData.size > 0) && (
<div className="w-full">
<FilePreviewList
files={files}
onRemoveFile={(file) =>
setFiles(files.filter((f) => f !== file))
}
pdfData={pdfData}
urlData={urlData}
onRemoveUrl={(url) =>
setUrlData((prev) => {
const next = new Map(prev)
next.delete(url)
return next
})
}
/>
</div>
)}
</div>
)}
<textarea
ref={textareaRef}
value={input}
onChange={(e) => setInput(e.target.value)}
onKeyDown={handleKeyDown}
onPaste={handlePaste}
placeholder={
placeholder ??
(chatSelection.length > 0
? dict.selection.placeholder
: dict.chat.placeholder)
}
disabled={isDisabled}
aria-label={dict.chat.inputLabel}
data-testid="chat-input"
rows={isHero ? 3 : 2}
className={cn(
"block w-full resize-none bg-transparent text-foreground outline-none placeholder:text-faint scrollbar-thin disabled:opacity-60",
isHero
? "min-h-[84px] px-[18px] pt-4 pb-1 text-[15px] leading-relaxed"
: "min-h-[52px] px-3.5 pt-3 pb-1 text-sm",
)}
/>
<div
className={cn(
"flex items-center gap-0.5",
isHero ? "px-2.5 pt-1 pb-2.5" : "px-1.5 pt-0.5 pb-1.5",
)}
>
<Popover open={addOpen} onOpenChange={setAddOpen}>
<PopoverTrigger asChild>
<IconButton
label={dict.chat.attach}
tooltipSide="top"
disabled={isDisabled}
data-testid="composer-add"
>
<Plus />
</IconButton>
</PopoverTrigger>
<PopoverContent
side="top"
align="start"
className="w-64 p-1"
>
<MenuItem
icon={<Paperclip />}
onClick={() => {
setAddOpen(false)
fileInputRef.current?.click()
}}
>
{dict.chat.uploadFile}
</MenuItem>
<MenuItem
icon={<Globe />}
onClick={() => {
setAddOpen(false)
setShowUrlDialog(true)
}}
>
{dict.chat.ExtractURL}
</MenuItem>
<MenuItem
icon={<BookmarkPlus />}
disabled={!input.trim()}
disabledHint={dict.templates.saveDisabledHint}
onClick={() => {
setAddOpen(false)
setSaveTemplateOpen(true)
}}
>
{dict.templates.saveAsTemplate}
</MenuItem>
</PopoverContent>
</Popover>
<IconButton
label={dict.templates.myTemplates}
tooltipSide="top"
disabled={isDisabled}
onClick={() => setTemplatesOpen(true)}
>
<BookMarked />
</IconButton>
<div className="ml-auto flex min-w-0 flex-1 items-center justify-end gap-1">
<ModelSelector
models={modelConfig.models}
selectedModelId={modelConfig.selectedModelId}
onSelect={modelConfig.setSelectedModelId}
onConfigure={() => openSettings("models")}
disabled={isDisabled}
showUnvalidatedModels={
modelConfig.showUnvalidatedModels
}
/>
{!isBusy && input.trim() && (
<kbd
className="hidden shrink-0 font-sans text-[11px] text-faint sm:inline"
aria-hidden
>
{sendShortcut === "enter" ? "↵" : `${modKey}↵`}
</kbd>
)}
{isBusy ? (
<button
type="button"
onClick={engine.stop}
aria-label={dict.chat.stopGeneration}
className="inline-flex size-8 shrink-0 items-center justify-center rounded-[10px] bg-foreground text-background transition-opacity hover:opacity-85"
>
<Square className="size-3 fill-current" />
</button>
) : (
<button
type="submit"
disabled={!canSend}
aria-label={dict.chat.send}
className="inline-flex size-8 shrink-0 items-center justify-center rounded-[10px] bg-primary text-primary-foreground transition-[opacity,background-color] hover:opacity-90 disabled:bg-muted disabled:text-faint"
>
<ArrowUp className="size-4 stroke-[2.25]" />
</button>
)}
</div>
</div>
<input
ref={fileInputRef}
type="file"
className="hidden"
accept={ATTACHMENT_ACCEPT}
data-testid="attachment-input"
multiple
disabled={isDisabled}
onChange={(e) => {
addFiles(Array.from(e.target.files || []))
e.target.value = ""
}}
/>
<UrlInputDialog
open={showUrlDialog}
onOpenChange={setShowUrlDialog}
onSubmit={handleUrlExtract}
isExtracting={isExtractingUrl}
/>
<TemplateCreateDialog
open={saveTemplateOpen}
onOpenChange={setSaveTemplateOpen}
onSuccess={() => setSaveTemplateOpen(false)}
initialPrompt={input.trim()}
/>
<Dialog open={templatesOpen} onOpenChange={setTemplatesOpen}>
<DialogContent className="flex max-h-[80vh] flex-col gap-0 p-0 sm:max-w-lg">
<DialogHeader className="px-5 pt-5 pb-2">
<DialogTitle>{dict.templates.myTemplates}</DialogTitle>
</DialogHeader>
<div className="min-h-0 flex-1 overflow-y-auto px-3 pb-3 scrollbar-thin">
<TemplatePanel
setInput={(value) => {
setInput(value)
setTemplatesOpen(false)
}}
currentInput={input}
onSendTemplate={(template) => {
setTemplatesOpen(false)
engine.sendTemplate(template.prompt)
}}
/>
</div>
</DialogContent>
</Dialog>
</form>
)
}
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import { FileText, FileUp, History, Pencil } from "lucide-react"
import type React from "react"
import { useDictionary } from "@/hooks/use-dictionary"
import { getAssetUrl } from "@/lib/base-path"
import { cn } from "@/lib/utils"
import { useChatEngine } from "./chat-engine"
import { Composer } from "./composer"
import { SessionMenu } from "./session-menu"
interface Example {
key: string
title: string
description: string
/** Picture of the result (or of the input, for "replicate" examples) */
image?: string
prompt: string
/** Bundled file sent with the prompt; matches the cached example */
file?: { path: string; name: string; type: string }
}
async function loadExampleFile(file: NonNullable<Example["file"]>) {
const response = await fetch(getAssetUrl(file.path))
const blob = await response.blob()
return new File([blob], file.name, { type: file.type })
}
/** One start-screen choice: a small picture, a title and one line */
function ExampleCard({
onClick,
title,
description,
picture,
plain,
testId,
}: {
onClick: () => void
title: string
description: string
picture: React.ReactNode
/** An icon on a tinted tile instead of a diagram on paper */
plain?: boolean
testId?: string
}) {
return (
<button
type="button"
onClick={onClick}
className="group/example flex min-w-0 items-center gap-2.5 rounded-xl border border-border bg-card p-1.5 pr-2.5 text-left transition-colors hover:border-foreground/25"
data-testid={testId}
>
<span
className={cn(
"flex h-12 w-16 shrink-0 items-center justify-center overflow-hidden rounded-lg",
plain ? "bg-muted" : "sheet-light bg-white",
)}
>
{picture}
</span>
<span className="min-w-0 flex-1">
<span className="line-clamp-2 text-[13px] leading-snug font-medium text-foreground">
{title}
</span>
<span className="mt-0.5 block truncate text-xs text-muted-foreground">
{description}
</span>
</span>
</button>
)
}
/**
* Start screen over an empty canvas: one large message box and the cached
* examples (they answer instantly without calling a model).
*/
export function LobbyHero({
onDrawYourself,
onOpenFile,
compact = false,
}: {
onDrawYourself: () => void
onOpenFile: () => void
/** Phone layout: no example pictures, tighter spacing */
compact?: boolean
}) {
const dict = useDictionary()
const t = dict.lobby
const engine = useChatEngine()
// Prompts and file names must stay as they are: cached responses match them
const examples: Example[] = [
{
key: "paper",
title: dict.examples.paperToDiagram,
description: dict.examples.paperDescription,
prompt: "Summarize this paper as a diagram",
file: {
path: "/chain-of-thought.txt",
name: "chain-of-thought.txt",
type: "text/plain",
},
},
{
key: "animated",
title: dict.examples.animatedDiagram,
description: dict.examples.animatedDescription,
image: "/animated_connectors.svg",
prompt: "Give me a **animated connector** diagram of transformer's architecture",
},
{
key: "aws",
title: dict.examples.awsArchitecture,
description: dict.examples.awsDescription,
image: "/aws_demo.svg",
prompt: "Replicate this in aws style",
file: {
path: "/architecture.png",
name: "architecture.png",
type: "image/png",
},
},
{
key: "flowchart",
title: dict.examples.replicateFlowchart,
description: dict.examples.replicateDescription,
image: "/example.png",
prompt: "Replicate this flowchart.",
file: {
path: "/example.png",
name: "example.png",
type: "image/png",
},
},
{
key: "cat",
title: dict.examples.creativeDrawing,
description: dict.examples.creativeDescription,
image: "/cat_demo.svg",
prompt: "Draw a cat for me",
},
]
const pickExample = async (example: Example) => {
engine.setInput(example.prompt)
if (!example.file) {
engine.setFiles([])
return
}
try {
engine.setFiles([await loadExampleFile(example.file)])
} catch (error) {
console.error(dict.errors.failedToLoadExample, error)
}
}
return (
<div
className={cn(
"mx-auto w-full",
compact ? "max-w-xl px-4 py-8" : "max-w-[720px] px-6 py-10",
)}
data-testid="lobby-hero"
>
<h1
className={cn(
"text-center font-semibold tracking-[-0.025em] text-foreground",
compact
? "text-[26px] leading-tight"
: "text-[34px] leading-[1.15]",
)}
>
{t.title}
</h1>
<p
className={cn(
"mx-auto mt-2.5 max-w-[34em] text-center text-muted-foreground",
compact ? "mb-5 text-[13px]" : "mb-6 text-[14.5px]",
)}
>
{t.lede}
</p>
<Composer
variant="hero"
autoFocus={!compact}
placeholder={t.placeholder}
/>
<div
className={cn(
"mt-5 grid gap-2",
compact ? "grid-cols-1" : "grid-cols-3",
)}
>
{examples.map((example) =>
compact ? (
<button
key={example.key}
type="button"
onClick={() => pickExample(example)}
className="flex items-center gap-3 rounded-xl border border-border bg-card px-3 py-2.5 text-left hover:border-foreground/25"
>
<span className="min-w-0 flex-1">
<span className="block truncate text-[13px] font-medium">
{example.title}
</span>
<span className="block truncate text-xs text-muted-foreground">
{example.description}
</span>
</span>
</button>
) : (
<ExampleCard
key={example.key}
onClick={() => pickExample(example)}
title={example.title}
description={example.description}
testId={`example-${example.key}`}
picture={
example.image ? (
// biome-ignore lint/performance/noImgElement: static preview
<img
src={getAssetUrl(example.image)}
alt=""
className="max-h-10 max-w-[56px] object-contain transition-transform duration-300 group-hover/example:scale-[1.06]"
/>
) : (
<FileText className="size-5 text-muted-foreground" />
)
}
plain={!example.image}
/>
),
)}
{!compact && (
<ExampleCard
onClick={onOpenFile}
title={dict.workspace.openFile}
description={t.openFileHint}
picture={
<FileUp className="size-5 text-muted-foreground" />
}
plain
/>
)}
</div>
<p className="mt-3 text-center text-xs text-faint">
{dict.examples.cachedNote}
</p>
<div className="mt-6 flex flex-wrap items-center justify-center gap-x-5 gap-y-2 text-[13px] text-muted-foreground">
{engine.sessions.length > 0 && (
<SessionMenu align="center" onOpenFile={onOpenFile}>
<button
type="button"
className="inline-flex items-center gap-1.5 hover:text-foreground"
>
<History className="size-4" />
{t.recent}
</button>
</SessionMenu>
)}
{compact && (
<button
type="button"
onClick={onOpenFile}
className="inline-flex items-center gap-1.5 hover:text-foreground"
>
<FileUp className="size-4" />
{dict.workspace.openFile}
</button>
)}
<button
type="button"
onClick={onDrawYourself}
className="inline-flex items-center gap-1.5 hover:text-foreground"
data-testid="draw-yourself"
>
<Pencil className="size-4" />
{t.drawYourself}
</button>
</div>
</div>
)
}
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import type { UIMessage } from "ai"
import {
AlertCircle,
BookmarkPlus,
Check,
ChevronDown,
Copy,
FileCode,
FileText,
Link,
Pencil,
RotateCcw,
ThumbsDown,
ThumbsUp,
} from "lucide-react"
import { useEffect, useRef, useState } from "react"
import ReactMarkdown from "react-markdown"
import { toast } from "sonner"
import {
Reasoning,
ReasoningContent,
ReasoningTrigger,
} from "@/components/ai-elements/reasoning"
import { Shimmer } from "@/components/ai-elements/shimmer"
import { TemplateCreateDialog } from "@/components/chat/TemplateCreateDialog"
import type { ToolPartLike } from "@/components/chat/types"
import { ValidationCard } from "@/components/chat/ValidationCard"
import Image from "@/components/image-with-basepath"
import { useDictionary } from "@/hooks/use-dictionary"
import { getApiEndpoint } from "@/lib/base-path"
import { useCopy } from "@/lib/clipboard"
import { cn } from "@/lib/utils"
import { useUiStore } from "@/stores/ui-store"
import { useChatEngine } from "./chat-engine"
import {
getMessageTextContent,
getUserOriginalText,
splitTextIntoFileSections,
type TextSection,
} from "./message-text"
import { ToolActivity } from "./tool-activity"
function ActionButton({
label,
onClick,
active,
children,
}: {
label: string
onClick: () => void
active?: boolean
children: React.ReactNode
}) {
return (
<button
type="button"
onClick={onClick}
title={label}
aria-label={label}
className={cn(
"inline-flex size-7 items-center justify-center rounded-lg text-faint transition-colors hover:bg-accent hover:text-foreground [&_svg]:size-3.5",
active && "text-foreground",
)}
>
{children}
</button>
)
}
/** Copies a message's text, with a short "copied" state */
function CopyButton({ text }: { text: string }) {
const dict = useDictionary()
const { copied, copy } = useCopy(() =>
toast.error(dict.chat.failedToCopyDetail),
)
return (
<ActionButton
label={copied ? dict.chat.copied : dict.chat.copyResponse}
onClick={() => copy(text)}
>
{copied ? <Check /> : <Copy />}
</ActionButton>
)
}
function AttachedSection({ section }: { section: TextSection }) {
const [open, setOpen] = useState(false)
const dict = useDictionary()
const Icon =
section.fileType === "pdf"
? FileText
: section.fileType === "url"
? Link
: FileCode
const chars =
section.charCount && section.charCount >= 1000
? `${(section.charCount / 1000).toFixed(1)}k`
: section.charCount
return (
<div className="overflow-hidden rounded-lg border border-border bg-card">
<button
type="button"
onClick={(e) => {
e.stopPropagation()
setOpen((v) => !v)
}}
className="flex w-full items-center gap-2 px-2.5 py-1.5 text-left hover:bg-accent"
>
<Icon className="size-4 shrink-0 text-muted-foreground" />
<span className="min-w-0 flex-1 truncate text-xs font-medium text-foreground">
{section.filename}
</span>
<span className="shrink-0 text-[11px] text-faint">
{chars} {dict.file.chars}
</span>
<ChevronDown
className={cn(
"size-3.5 shrink-0 text-muted-foreground transition-transform",
open && "rotate-180",
)}
/>
</button>
{open && (
<pre className="max-h-48 overflow-y-auto whitespace-pre-wrap border-t border-border px-2.5 py-2 text-xs text-muted-foreground scrollbar-thin">
{section.content}
</pre>
)}
</div>
)
}
function MessageText({ text }: { text: string }) {
const sections = splitTextIntoFileSections(text)
return (
<div className="space-y-2">
{sections.map((section, index) =>
section.type === "text" ? (
<div
key={index}
className={cn(
"prose prose-sm max-w-none break-words text-[14px] leading-relaxed text-foreground [&>*:first-child]:mt-0 [&>*:last-child]:mb-0",
"prose-p:my-1.5 prose-pre:bg-surface-2 prose-pre:text-foreground prose-code:before:content-none prose-code:after:content-none dark:prose-invert",
)}
>
<ReactMarkdown>{section.content}</ReactMarkdown>
</div>
) : (
<AttachedSection key={index} section={section} />
),
)}
</div>
)
}
function UserMessage({
message,
index,
isLast,
}: {
message: UIMessage
index: number
isLast: boolean
}) {
const dict = useDictionary()
const engine = useChatEngine()
const [editing, setEditing] = useState(false)
const [editText, setEditText] = useState("")
const [saveTemplate, setSaveTemplate] = useState(false)
const textareaRef = useRef<HTMLTextAreaElement>(null)
const text = getMessageTextContent(message)
const canEdit = isLast && !engine.isBusy
useEffect(() => {
if (editing) textareaRef.current?.focus()
}, [editing])
const startEdit = () => {
if (!canEdit) return
setEditText(getUserOriginalText(message))
setEditing(true)
}
const submitEdit = () => {
if (!editText.trim()) return
engine.editMessage(index, editText.trim())
setEditing(false)
}
if (editing) {
return (
<div className="ml-6 flex flex-col gap-2">
<textarea
ref={textareaRef}
value={editText}
onChange={(e) => setEditText(e.target.value)}
rows={Math.min(editText.split("\n").length + 1, 6)}
onKeyDown={(e) => {
if (e.key === "Escape") setEditing(false)
else if (
e.key === "Enter" &&
(e.metaKey || e.ctrlKey)
) {
e.preventDefault()
submitEdit()
}
}}
className="w-full resize-none rounded-xl border border-foreground/20 bg-card px-3 py-2.5 text-sm outline-none focus:shadow-[0_0_0_4px_var(--accent)]"
/>
<div className="flex justify-end gap-2">
<button
type="button"
onClick={() => setEditing(false)}
className="h-7 rounded-lg px-3 text-xs text-muted-foreground hover:bg-accent hover:text-foreground"
>
{dict.common.cancel}
</button>
<button
type="button"
onClick={submitEdit}
disabled={!editText.trim()}
className="h-7 rounded-lg bg-primary px-3 text-xs font-medium text-primary-foreground disabled:opacity-40"
>
{dict.chat.saveAndSubmit}
</button>
</div>
</div>
)
}
const images = (message.parts ?? []).filter((p) => p.type === "file") as {
url: string
}[]
return (
<div className="group/message flex items-start justify-end gap-1">
<div className="mt-1 flex shrink-0 items-center transition-opacity [@media(hover:hover)]:opacity-0 group-hover/message:opacity-100 focus-within:opacity-100">
{canEdit && (
<ActionButton
label={dict.chat.editMessage}
onClick={startEdit}
>
<Pencil />
</ActionButton>
)}
<CopyButton text={text} />
<ActionButton
label={dict.templates.saveAsTemplate}
onClick={() => setSaveTemplate(true)}
>
<BookmarkPlus />
</ActionButton>
</div>
<div
className={cn(
"min-w-0 max-w-[85%] rounded-2xl rounded-br-md bg-secondary px-3.5 py-2.5",
canEdit &&
"cursor-pointer transition-colors hover:bg-interactive-active",
)}
role={canEdit ? "button" : undefined}
tabIndex={canEdit ? 0 : undefined}
onClick={startEdit}
onKeyDown={(e) => {
if (canEdit && (e.key === "Enter" || e.key === " ")) {
e.preventDefault()
startEdit()
}
}}
title={canEdit ? dict.chat.clickToEdit : undefined}
>
{images.length > 0 && (
<div className="mb-2 flex flex-wrap gap-1.5">
{images.map((image, i) => (
<Image
key={i}
src={image.url}
width={96}
height={72}
alt={dict.chat.attachedImage}
className="h-[72px] w-24 rounded-lg border border-border bg-white object-cover"
/>
))}
</div>
)}
{text && <MessageText text={text} />}
</div>
{saveTemplate && (
<TemplateCreateDialog
open
onOpenChange={(open) => !open && setSaveTemplate(false)}
onSuccess={() => setSaveTemplate(false)}
initialPrompt={getUserOriginalText(message)}
/>
)}
</div>
)
}
function AssistantMessage({
message,
index,
isLastMessage,
isLastAssistant,
}: {
message: UIMessage
index: number
isLastMessage: boolean
isLastAssistant: boolean
}) {
const dict = useDictionary()
// The thinking header in the page language
const thinkingMessage = (isStreaming: boolean, duration?: number) => {
if (isStreaming || duration === 0) {
return <Shimmer duration={1}>{dict.reasoning.thinking}</Shimmer>
}
if (duration === undefined) return <p>{dict.reasoning.thoughtBrief}</p>
return (
<p>
{duration === 1
? dict.reasoning.thoughtForOne
: dict.reasoning.thoughtFor.replace(
"{duration}",
String(duration),
)}
</p>
)
}
const engine = useChatEngine()
const [feedback, setFeedback] = useState<"good" | "bad" | null>(null)
const isRestored = engine.loadedMessageIdsRef.current.has(message.id)
const parts = message.parts ?? []
const isCachedExample = parts.some((p: any) =>
p.toolCallId?.startsWith("cached-"),
)
const text = getMessageTextContent(message)
const submitFeedback = async (value: "good" | "bad") => {
if (feedback === value) {
setFeedback(null)
return
}
setFeedback(value)
try {
await fetch(getApiEndpoint("/api/log-feedback"), {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
messageId: message.id,
feedback: value,
sessionId: engine.langfuseSessionId,
}),
})
} catch (error) {
console.error("Failed to log feedback:", error)
toast.error(dict.errors.failedToRecordFeedback)
setFeedback(null)
}
}
// Consecutive text parts render together; tools render in place
const blocks: { kind: "text" | "tool" | "reasoning"; index: number }[] = []
parts.forEach((part, partIndex) => {
if (part.type === "reasoning")
blocks.push({ kind: "reasoning", index: partIndex })
else if (part.type?.startsWith("tool-"))
blocks.push({ kind: "tool", index: partIndex })
else if (part.type === "text") {
const last = blocks[blocks.length - 1]
if (last?.kind !== "text")
blocks.push({ kind: "text", index: partIndex })
}
})
const textRun = (start: number) => {
const out: string[] = []
for (let i = start; i < parts.length && parts[i].type === "text"; i++) {
out.push((parts[i] as { text: string }).text)
}
return out.join("\n")
}
return (
<div className="group/message space-y-2.5">
{blocks.map((block) => {
const part = parts[block.index]
if (block.kind === "reasoning") {
const isStreamingReasoning =
engine.status === "streaming" &&
isLastMessage &&
block.index === parts.length - 1
return (
<Reasoning
key={`r-${block.index}`}
className="w-full"
isStreaming={isStreamingReasoning}
defaultOpen={!isRestored}
>
<ReasoningTrigger
getThinkingMessage={thinkingMessage}
/>
<ReasoningContent>
{(part as { text: string }).text}
</ReasoningContent>
</Reasoning>
)
}
if (block.kind === "tool") {
const toolPart = part as unknown as ToolPartLike
const validationState =
engine.validationStates[toolPart.toolCallId]
return (
<div key={`t-${block.index}`} className="space-y-2">
<ToolActivity
part={toolPart}
isLastMessage={isLastMessage}
/>
{toolPart.type === "tool-display_diagram" &&
validationState && (
<ValidationCard
state={validationState}
onImproveWithSuggestions={
engine.improveWithSuggestions
}
/>
)}
</div>
)
}
const run = textRun(block.index)
if (!run.trim()) return null
return <MessageText key={`x-${block.index}`} text={run} />
})}
{!(engine.isBusy && isLastMessage) && (
<div className="-ml-1.5 flex items-center transition-opacity [@media(hover:hover)]:opacity-0 group-hover/message:opacity-100 focus-within:opacity-100">
{text && <CopyButton text={text} />}
{isLastAssistant && !isCachedExample && (
<ActionButton
label={dict.chat.regenerate}
onClick={() => engine.regenerate(index)}
>
<RotateCcw />
</ActionButton>
)}
<ActionButton
label={dict.chat.goodResponse}
active={feedback === "good"}
onClick={() => submitFeedback("good")}
>
<ThumbsUp
className={cn(
feedback === "good" && "fill-current",
)}
/>
</ActionButton>
<ActionButton
label={dict.chat.badResponse}
active={feedback === "bad"}
onClick={() => submitFeedback("bad")}
>
<ThumbsDown
className={cn(feedback === "bad" && "fill-current")}
/>
</ActionButton>
</div>
)}
</div>
)
}
/**
* A failed request: what to do in the text color, the provider's own words
* below it, and the action that can fix it first
*/
function ErrorNotice({
text,
openModelConfig,
onOpenModelConfig,
onRetry,
}: {
text: string
openModelConfig: boolean
onOpenModelConfig: () => void
onRetry?: () => void
}) {
const dict = useDictionary()
// Provider errors are "hint\n\nprovider message"
const split = text.indexOf("\n\n")
const headline = split >= 0 ? text.slice(0, split) : text
const detail = split >= 0 ? text.slice(split + 2).trim() : ""
const button =
"inline-flex h-7 items-center gap-1 rounded-lg px-2.5 text-xs font-medium"
return (
<div
role="alert"
className="rounded-xl border border-destructive/25 bg-destructive/5 px-3.5 py-3 text-[13px]"
>
<div className="flex items-start gap-2.5">
<AlertCircle className="mt-0.5 size-4 shrink-0 text-destructive" />
<div className="min-w-0 flex-1">
<p className="whitespace-pre-line break-words font-medium text-foreground">
{headline}
</p>
{detail && (
<p className="mt-1 whitespace-pre-line break-words text-xs text-muted-foreground">
{detail}
</p>
)}
{(openModelConfig || onRetry) && (
<div className="mt-2.5 flex flex-wrap gap-2">
{openModelConfig && (
<button
type="button"
onClick={onOpenModelConfig}
className={cn(
button,
"bg-primary text-primary-foreground hover:opacity-90",
)}
>
{dict.errors.llm.openModelSettings}
</button>
)}
{onRetry && (
<button
type="button"
onClick={onRetry}
className={cn(
button,
"border border-border bg-card text-foreground hover:bg-accent",
)}
data-testid="retry-button"
>
<RotateCcw className="size-3.5" />
{dict.chat.retry}
</button>
)}
</div>
)}
</div>
</div>
</div>
)
}
export function MessageList() {
const dict = useDictionary()
const openSettings = useUiStore((s) => s.openSettings)
const engine = useChatEngine()
const { messages } = engine
const endRef = useRef<HTMLDivElement>(null)
const prevCountRef = useRef(0)
const throttleRef = useRef<ReturnType<typeof setTimeout> | null>(null)
// Keep the newest message in view; jump instantly on bulk loads
useEffect(() => {
if (!endRef.current || messages.length === 0) return
const prev = prevCountRef.current
prevCountRef.current = messages.length
if (prev === 0 || messages.length - prev > 1) {
endRef.current.scrollIntoView({ behavior: "instant", block: "end" })
return
}
if (!throttleRef.current) {
endRef.current.scrollIntoView({ behavior: "smooth", block: "end" })
throttleRef.current = setTimeout(() => {
throttleRef.current = null
endRef.current?.scrollIntoView({
behavior: "smooth",
block: "end",
})
}, 150)
}
}, [messages])
const lastAssistantIndex = messages
.map((m) => m.role)
.lastIndexOf("assistant")
const lastUserIndex = messages.map((m) => m.role).lastIndexOf("user")
return (
<div className="space-y-4 px-4 pt-4 pb-2">
{messages.map((message, index) => {
const isRestored = engine.loadedMessageIdsRef.current.has(
message.id,
)
return (
<div
key={message.id}
className={cn(!isRestored && "animate-message-in")}
>
{message.role === "user" ? (
<UserMessage
message={message}
index={index}
isLast={index === lastUserIndex}
/>
) : message.role === "assistant" ? (
<AssistantMessage
message={message}
index={index}
isLastMessage={index === messages.length - 1}
isLastAssistant={index === lastAssistantIndex}
/>
) : (
<ErrorNotice
text={getMessageTextContent(message)}
openModelConfig={
!!(
message.metadata as
| { openModelConfig?: boolean }
| undefined
)?.openModelConfig
}
onOpenModelConfig={() => openSettings("models")}
onRetry={
index === messages.length - 1 &&
!engine.isBusy &&
lastUserIndex >= 0
? engine.retryLastMessage
: undefined
}
/>
)}
</div>
)
})}
{engine.status === "submitted" &&
messages[messages.length - 1]?.role === "user" && (
<div className="px-1 text-[13px]" aria-live="polite">
<Shimmer as="span">{dict.reasoning.thinking}</Shimmer>
</div>
)}
<div ref={endRef} />
</div>
)
}
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import type { UIMessage } from "ai"
/** A run of plain text, or an attached file / URL whose text was inlined */
export interface TextSection {
type: "text" | "file" | "url"
content: string
filename?: string
charCount?: number
fileType?: "pdf" | "text" | "url"
}
// Matches the [PDF: ...], [File: ...] and [URL: ...] sections appended to the user's text
export const APPENDED_FILE_SECTIONS_PATTERN =
/\n\n\[(PDF|File|URL):\s*[^\]]+\]\n[\s\S]*$/
export function splitTextIntoFileSections(text: string): TextSection[] {
const sections: TextSection[] = []
const filePattern =
/\[(PDF|File|URL):\s*([^\]]+)\]\n([\s\S]*?)(?=\n\n\[(PDF|File|URL):|$)/g
let lastIndex = 0
let match: RegExpExecArray | null
while ((match = filePattern.exec(text)) !== null) {
const beforeText = text.slice(lastIndex, match.index).trim()
if (beforeText) sections.push({ type: "text", content: beforeText })
const sectionType = match[1].toLowerCase()
const fileType =
sectionType === "pdf"
? "pdf"
: sectionType === "url"
? "url"
: "text"
const content = match[3].trim()
sections.push({
type: sectionType === "url" ? "url" : "file",
content,
filename: match[2].trim(),
charCount: content.length,
fileType,
})
lastIndex = match.index + match[0].length
}
const remainingText = text.slice(lastIndex).trim()
if (remainingText) sections.push({ type: "text", content: remainingText })
if (sections.length === 0) sections.push({ type: "text", content: text })
return sections
}
export function getMessageTextContent(message: UIMessage): string {
if (!message.parts) return ""
return message.parts
.filter((part) => part.type === "text")
.map((part) => (part as { text: string }).text)
.join("\n")
}
/** Only the user's typed text, without appended file content */
export function getUserOriginalText(message: UIMessage): string {
return getMessageTextContent(message)
.replace(APPENDED_FILE_SECTIONS_PATTERN, "")
.trim()
}
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import { FileUp, Pencil, Plus, Search, Trash2 } from "lucide-react"
import { useParams } from "next/navigation"
import { useEffect, useRef, useState } from "react"
import {
AlertDialog,
AlertDialogAction,
AlertDialogCancel,
AlertDialogContent,
AlertDialogDescription,
AlertDialogFooter,
AlertDialogHeader,
AlertDialogTitle,
} from "@/components/ui/alert-dialog"
import {
Popover,
PopoverContent,
PopoverTrigger,
} from "@/components/ui/popover"
import { useDictionary } from "@/hooks/use-dictionary"
import { formatRelativeTime } from "@/lib/relative-time"
import { cn } from "@/lib/utils"
import { useChatEngine } from "./chat-engine"
/** Title shown for a session, with the default "New Chat" localized */
export function useSessionTitle(): string {
const dict = useDictionary()
const { currentTitle } = useChatEngine()
return !currentTitle || currentTitle === "New Chat"
? dict.workspace.untitled
: currentTitle
}
/**
* Popover listing saved diagrams: rename the current one, switch, delete,
* start a new one or open a file.
*/
export function SessionMenu({
children,
align = "start",
onOpenFile,
}: {
children: React.ReactNode
align?: "start" | "center" | "end"
onOpenFile: () => void
}) {
const dict = useDictionary()
const t = dict.sessionHistory
const params = useParams<{ lang: string }>()
const engine = useChatEngine()
const [open, setOpen] = useState(false)
const title = useSessionTitle()
const [query, setQuery] = useState("")
const [renaming, setRenaming] = useState(false)
const [draftTitle, setDraftTitle] = useState("")
const [toDelete, setToDelete] = useState<string | null>(null)
const renameRef = useRef<HTMLInputElement>(null)
useEffect(() => {
if (!open) {
setRenaming(false)
setQuery("")
}
}, [open])
useEffect(() => {
if (renaming) renameRef.current?.select()
}, [renaming])
const sessions = engine.sessions.filter((s) =>
s.title.toLowerCase().includes(query.trim().toLowerCase()),
)
const commitRename = async () => {
const next = draftTitle.trim()
setRenaming(false)
if (next && next !== title) await engine.renameSession(next)
}
return (
<>
<Popover open={open} onOpenChange={setOpen}>
<PopoverTrigger asChild>{children}</PopoverTrigger>
<PopoverContent
align={align}
className="flex max-h-[min(560px,80vh)] w-[340px] flex-col overflow-hidden rounded-xl p-0 shadow-pop"
>
<div className="border-b border-border p-3">
{renaming ? (
<input
ref={renameRef}
value={draftTitle}
onChange={(e) => setDraftTitle(e.target.value)}
onBlur={commitRename}
onKeyDown={(e) => {
// Enter that picks an IME candidate
// (Safari: keyCode 229)
if (
e.nativeEvent.isComposing ||
e.keyCode === 229
) {
return
}
if (e.key === "Enter") commitRename()
if (e.key === "Escape") setRenaming(false)
}}
maxLength={100}
aria-label={t.rename}
className="h-8 w-full rounded-lg border border-foreground/20 bg-card px-2.5 text-[13px] font-medium outline-none"
/>
) : (
<button
type="button"
onClick={() => {
setDraftTitle(title)
setRenaming(true)
}}
className="group/rename flex h-8 w-full items-center gap-2 rounded-lg px-2.5 text-left hover:bg-accent"
data-testid="rename-session"
>
<span className="min-w-0 flex-1 truncate text-[13px] font-medium">
{title}
</span>
<Pencil className="size-3.5 shrink-0 text-muted-foreground" />
</button>
)}
<div className="mt-2 flex gap-1.5">
<button
type="button"
disabled={engine.isBusy}
onClick={() => {
setOpen(false)
engine.newChat()
}}
className="flex h-8 flex-1 items-center justify-center gap-1.5 rounded-lg bg-primary text-xs font-medium text-primary-foreground hover:opacity-90 disabled:opacity-40"
>
<Plus className="size-3.5" />
{dict.nav.newChat}
</button>
<button
type="button"
disabled={engine.isBusy}
onClick={() => {
setOpen(false)
onOpenFile()
}}
className="flex h-8 flex-1 items-center justify-center gap-1.5 rounded-lg border border-border text-xs text-muted-foreground hover:text-foreground disabled:opacity-40"
>
<FileUp className="size-3.5" />
{dict.workspace.openFile}
</button>
</div>
</div>
{engine.sessions.length > 0 && (
<div className="px-3 pt-3">
<div className="relative">
<Search className="pointer-events-none absolute top-1/2 left-2.5 size-3.5 -translate-y-1/2 text-faint" />
<input
value={query}
onChange={(e) => setQuery(e.target.value)}
placeholder={t.searchPlaceholder}
className="h-8 w-full rounded-lg bg-muted pr-2.5 pl-8 text-[13px] outline-none placeholder:text-faint"
/>
</div>
</div>
)}
<div className="min-h-0 flex-1 overflow-y-auto p-1.5 scrollbar-thin">
{engine.sessions.length === 0 ? (
<p className="px-3 py-6 text-center text-xs text-muted-foreground">
{t.empty}
</p>
) : sessions.length === 0 ? (
<p className="px-3 py-6 text-center text-xs text-muted-foreground">
{t.noResults}
</p>
) : (
sessions.map((session) => {
const isCurrent =
session.id === engine.currentSessionId
// The answer being written must stay in its
// own chat
const locked = engine.isBusy && !isCurrent
const choose = () => {
if (locked) return
setOpen(false)
if (!isCurrent) {
engine.selectSession(session.id)
}
}
return (
// biome-ignore lint/a11y/useSemanticElements: contains the delete button
<div
key={session.id}
role="button"
tabIndex={locked ? -1 : 0}
aria-disabled={locked || undefined}
title={locked ? t.busyHint : undefined}
onClick={choose}
onKeyDown={(e) => {
if (e.target !== e.currentTarget)
return
if (
e.key === "Enter" ||
e.key === " "
) {
e.preventDefault()
choose()
}
}}
className={cn(
"group/session flex cursor-pointer items-center gap-2.5 rounded-lg p-1.5 hover:bg-accent",
isCurrent && "bg-accent",
locked &&
"cursor-not-allowed opacity-50 hover:bg-transparent",
)}
>
<span className="sheet-light flex h-9 w-12 shrink-0 items-center justify-center overflow-hidden rounded-md border border-border bg-white">
{session.thumbnailDataUrl && (
// biome-ignore lint/performance/noImgElement: data URL thumbnail
<img
src={
session.thumbnailDataUrl
}
alt=""
className="max-h-8 max-w-11 object-contain"
/>
)}
</span>
<span className="min-w-0 flex-1">
<span className="block truncate text-[13px] text-foreground">
{session.title === "New Chat"
? dict.workspace.untitled
: session.title}
</span>
<span className="block text-[11px] text-faint">
{formatRelativeTime(
session.updatedAt,
params.lang,
t.justNow,
)}
</span>
</span>
<button
type="button"
disabled={
isCurrent && engine.isBusy
}
onClick={(e) => {
e.stopPropagation()
setToDelete(session.id)
}}
aria-label={t.deleteTitle}
className="inline-flex size-7 shrink-0 items-center justify-center rounded-md text-faint [@media(hover:hover)]:opacity-0 hover:bg-destructive/10 hover:text-destructive group-hover/session:opacity-100 focus-visible:opacity-100"
>
<Trash2 className="size-3.5" />
</button>
</div>
)
})
)}
</div>
</PopoverContent>
</Popover>
<AlertDialog
open={!!toDelete}
onOpenChange={(o) => !o && setToDelete(null)}
>
<AlertDialogContent>
<AlertDialogHeader>
<AlertDialogTitle>{t.deleteTitle}</AlertDialogTitle>
<AlertDialogDescription>
{t.deleteDescription}
</AlertDialogDescription>
</AlertDialogHeader>
<AlertDialogFooter>
<AlertDialogCancel>
{dict.common.cancel}
</AlertDialogCancel>
<AlertDialogAction
className="bg-destructive text-white hover:bg-destructive/90"
onClick={() => {
if (toDelete) engine.deleteSession(toDelete)
setToDelete(null)
}}
>
{dict.common.delete}
</AlertDialogAction>
</AlertDialogFooter>
</AlertDialogContent>
</AlertDialog>
</>
)
}
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import {
AlertCircle,
Check,
ChevronDown,
Code2,
Copy,
Library,
PenTool,
Redo2,
RotateCcw,
Undo2,
} from "lucide-react"
import { useState } from "react"
import { Shimmer } from "@/components/ai-elements/shimmer"
import { CodeBlock } from "@/components/code-block"
import { useDictionary } from "@/hooks/use-dictionary"
import { useCopy } from "@/lib/clipboard"
import { formatMessage } from "@/lib/i18n/utils"
import { cn, isMxCellXmlComplete } from "@/lib/utils"
import { describeChanges } from "@/lib/version-text"
import { useUiStore } from "@/stores/ui-store"
import { type DiagramVersion, useVersionsStore } from "@/stores/versions-store"
import { useChatEngine } from "./chat-engine"
import type { DiagramOperation, ToolPartLike } from "./types"
export function ToolInputDetails({ part }: { part: ToolPartLike }) {
const { input, state } = part
if (!input || typeof input !== "object") return null
if (typeof input.xml === "string" && input.xml) {
// Plain text while streaming; highlighting re-runs on every chunk
return state === "input-streaming" || state === "input-available" ? (
<pre className="max-h-48 overflow-auto whitespace-pre-wrap break-all font-mono text-[11px] leading-relaxed text-muted-foreground scrollbar-thin">
{input.xml}
</pre>
) : (
<CodeBlock code={input.xml} language="xml" />
)
}
if (Array.isArray(input.operations)) {
// Streamed or invalid input can hold anything: show only what React
// can render (an object in place of a string would crash the chat)
const shown = (input.operations as DiagramOperation[]).filter(
(op) =>
typeof (op as { operation?: unknown })?.operation === "string",
)
const text = (value: unknown) =>
typeof value === "string" ? value : ""
return (
<div className="space-y-2">
{shown.map((op, index) => (
<div
key={`${op.operation}-${text(op.cell_id)}-${index}`}
className="overflow-hidden rounded-lg border border-border bg-card"
>
<div className="flex items-center gap-2 border-b border-border px-2.5 py-1 text-[11px]">
<span className="font-medium text-foreground">
{op.operation}
</span>
<span className="text-muted-foreground">
{text(op.cell_id)}
</span>
</div>
{text(op.new_xml) && (
<pre className="overflow-x-auto whitespace-pre-wrap break-all px-2.5 py-1.5 font-mono text-[11px] text-muted-foreground">
{text(op.new_xml)}
</pre>
)}
</div>
))}
</div>
)
}
if (Object.keys(input).length === 0) return null
return <CodeBlock code={JSON.stringify(input, null, 2)} language="json" />
}
function toolText(part: ToolPartLike): string {
const { input } = part
if (!input || typeof input !== "object") return ""
if (typeof input.xml === "string" && input.xml) return input.xml
if (Array.isArray(input.operations)) {
return JSON.stringify(input.operations, null, 2)
}
return JSON.stringify(input, null, 2)
}
/** Picture of a version (SVG data URL), or what stands in for it */
export function VersionThumb({
svg,
dimmed,
className,
}: {
/** undefined or null: still being made; "": none could be made */
svg: string | null | undefined
dimmed?: boolean
className?: string
}) {
const t = useDictionary().versions
if (svg) {
return (
// biome-ignore lint/performance/noImgElement: data URL thumbnail
<img
src={svg}
alt=""
className={cn(
"object-contain transition-opacity",
dimmed && "opacity-40",
className,
)}
/>
)
}
if (svg === "") {
return <span className="text-xs text-faint">{t.noPreview}</span>
}
return (
<Shimmer as="span" className="text-xs">
{t.rendering}
</Shimmer>
)
}
/**
* Card for one diagram version produced by a tool call. The latest shows
* its picture; older ones fold into one row (the picture opens Compare).
*/
function VersionCard({
part,
version,
index,
isLatest,
}: {
part: ToolPartLike
version: DiagramVersion
index: number
isLatest: boolean
}) {
const dict = useDictionary()
const t = dict.versions
const engine = useChatEngine()
const undoneVersionId = useVersionsStore((s) => s.undoneVersionId)
const onCanvasVersionId = useVersionsStore((s) => s.onCanvasVersionId)
const openCompare = useUiStore((s) => s.openCompare)
const [showCode, setShowCode] = useState(false)
const { copied, copy } = useCopy()
const isUndone = undoneVersionId === version.id
const isOnCanvas = onCanvasVersionId === version.id
const isEdit = part.type === "tool-edit_diagram"
// Undo/redo belongs to the newest change while it is (or was) on the
// canvas; after an older version was restored, this one is restored too
const canUndo =
isLatest && version.beforeXml !== undefined && (isOnCanvas || isUndone)
const title = isUndone ? t.undone : isEdit ? t.edited : t.created
const summary = version.fromScratch
? formatMessage(t.totals, {
shapes: version.summary.shapesAdded,
edges: version.summary.edgesAdded,
})
: describeChanges(version.summary, t)
const badge = (
<span
className={cn(
"shrink-0 rounded-md px-1.5 py-0.5 text-[11px] font-semibold tabular-nums",
isOnCanvas
? "bg-marker-soft text-marker-ink"
: "bg-muted text-muted-foreground",
)}
>
v{index + 1}
</span>
)
const actionClass =
"inline-flex h-7 shrink-0 items-center gap-1 rounded-lg px-2 text-xs text-muted-foreground hover:bg-accent hover:text-foreground disabled:opacity-40"
const restoreButton = (
<button
type="button"
disabled={engine.isBusy || isOnCanvas}
onClick={() => engine.restoreVersion(version.id)}
className={actionClass}
data-testid="version-restore"
>
<RotateCcw className="size-3.5" />
{formatMessage(t.restoreVersion, { n: index + 1 })}
</button>
)
if (!isLatest) {
return (
<div
className="flex items-center gap-2.5 rounded-xl border border-border bg-card p-1.5 pr-2"
data-testid="version-card"
data-tool-state={part.state}
>
<button
type="button"
onClick={() => openCompare(version.id)}
className="sheet-light flex h-9 w-14 shrink-0 items-center justify-center overflow-hidden rounded-md border border-border bg-white hover:border-foreground/30"
aria-label={t.compare}
title={t.compare}
>
<VersionThumb
svg={version.svg}
className="max-h-8 max-w-[52px]"
/>
</button>
{badge}
<div className="min-w-0 flex-1" title={summary}>
<div className="truncate text-[13px] text-foreground">
{title}
</div>
<div className="truncate text-xs text-muted-foreground">
{summary}
</div>
</div>
{restoreButton}
</div>
)
}
return (
<div
className={cn(
"overflow-hidden rounded-xl border border-border bg-card",
isOnCanvas && "border-foreground/15",
)}
data-testid="version-card"
data-tool-state={part.state}
>
<button
type="button"
onClick={() => openCompare(version.id)}
className="group/thumb sheet-light relative flex h-24 w-full items-center justify-center border-b border-border bg-white"
aria-label={t.compare}
>
<VersionThumb
svg={version.svg}
dimmed={isUndone}
className="max-h-20 max-w-[88%]"
/>
<span className="absolute right-2 bottom-2 rounded-md bg-black/60 px-1.5 py-0.5 text-[11px] text-white opacity-0 transition-opacity group-hover/thumb:opacity-100">
{t.compare}
</span>
</button>
<div className="flex items-center gap-2.5 px-3 py-2.5">
{badge}
<div className="min-w-0 flex-1" title={summary}>
<div className="truncate text-[13px] font-medium text-foreground">
{title}
</div>
<div className="line-clamp-2 text-xs text-muted-foreground">
{summary}
</div>
</div>
<button
type="button"
onClick={() => setShowCode((v) => !v)}
aria-label={showCode ? t.hideCode : t.showCode}
title={showCode ? t.hideCode : t.showCode}
className="inline-flex size-7 shrink-0 items-center justify-center rounded-lg text-muted-foreground hover:bg-accent hover:text-foreground"
>
<Code2 className="size-4" />
</button>
{canUndo ? (
<button
type="button"
disabled={engine.isBusy}
onClick={() => engine.undoVersion(version.id)}
className={actionClass}
data-testid="version-undo"
>
{isUndone ? (
<Redo2 className="size-3.5" />
) : (
<Undo2 className="size-3.5" />
)}
{isUndone ? t.redo : t.undo}
</button>
) : (
restoreButton
)}
</div>
{showCode && (
<div className="relative border-t border-border bg-surface-1 px-3 py-2.5">
<button
type="button"
onClick={() => copy(toolText(part))}
className="absolute top-2 right-2 z-10 inline-flex size-7 items-center justify-center rounded-lg bg-card text-muted-foreground shadow-float hover:text-foreground"
aria-label={dict.chat.copyResponse}
>
{copied ? (
<Check className="size-3.5" />
) : (
<Copy className="size-3.5" />
)}
</button>
<ToolInputDetails part={part} />
</div>
)}
</div>
)
}
/** Compact row for tool calls that are running, failed or produced no version */
function ToolRow({
part,
icon,
label,
tone = "default",
detail,
}: {
part: ToolPartLike
icon: React.ReactNode
label: React.ReactNode
tone?: "default" | "error" | "warning"
detail?: string
}) {
const [open, setOpen] = useState(false)
const hasInput = !!part.input && Object.keys(part.input).length > 0
return (
<div
className={cn(
"overflow-hidden rounded-xl border border-border bg-card",
tone === "error" && "border-destructive/25",
)}
data-testid="tool-row"
data-tool-name={part.type?.replace("tool-", "")}
data-tool-state={part.state}
>
<button
type="button"
onClick={() => setOpen((v) => !v)}
disabled={!hasInput && !detail}
className="flex w-full items-center gap-2.5 px-3 py-2.5 text-left"
>
<span
className={cn(
"inline-flex size-7 shrink-0 items-center justify-center rounded-lg bg-muted text-muted-foreground [&_svg]:size-4",
tone === "error" &&
"bg-destructive/10 text-destructive",
tone === "warning" && "bg-marker-soft text-marker-ink",
)}
>
{icon}
</span>
<span className="min-w-0 flex-1 truncate text-[13px] text-foreground">
{label}
</span>
{(hasInput || detail) && (
<ChevronDown
className={cn(
"size-4 shrink-0 text-muted-foreground transition-transform",
open && "rotate-180",
)}
/>
)}
</button>
{open && (
<div className="space-y-2 border-t border-border bg-surface-1 px-3 py-2.5">
{detail && (
<p
className={cn(
"whitespace-pre-wrap break-words text-xs",
tone === "error"
? "text-destructive"
: "text-muted-foreground",
)}
>
{detail}
</p>
)}
{hasInput && <ToolInputDetails part={part} />}
</div>
)}
</div>
)
}
export function ToolActivity({
part,
isLastMessage,
}: {
part: ToolPartLike
isLastMessage: boolean
}) {
const dict = useDictionary()
const t = dict.versions
const engine = useChatEngine()
const versions = useVersionsStore((s) => s.versions)
const toolName = part.type?.replace("tool-", "")
const { state, errorText, output } = part
const versionIndex = versions.findIndex(
(v) => v.toolCallId === part.toolCallId,
)
if (state === "output-available" && versionIndex >= 0) {
return (
<VersionCard
part={part}
version={versions[versionIndex]}
index={versionIndex}
isLatest={versionIndex === versions.length - 1}
/>
)
}
if (toolName === "get_shape_library" && state !== "output-error") {
const isDone = state === "output-available"
return (
<ToolRow
part={part}
icon={<Library />}
label={
isDone ? (
t.libraryLoaded
) : (
<Shimmer as="span">{t.loadingLibrary}</Shimmer>
)
}
detail={
isDone && typeof output === "string"
? `${output.slice(0, 600)}${output.length > 600 ? "…" : ""}`
: undefined
}
/>
)
}
if (state === "input-streaming" || state === "input-available") {
return (
<ToolRow
part={part}
icon={<PenTool />}
label={
<Shimmer as="span">
{toolName === "edit_diagram" ? t.editing : t.drawing}
</Shimmer>
}
/>
)
}
if (state === "output-error") {
const stopped = errorText === "Stopped by user"
// Incomplete XML means the output hit the length limit. Without an
// input the JSON was broken (the server repairs JSON cut short by
// the limit).
const truncated =
!stopped &&
(toolName === "display_diagram" || toolName === "append_diagram") &&
typeof part.input?.xml === "string" &&
!isMxCellXmlComplete(part.input.xml)
return (
<ToolRow
part={part}
icon={<AlertCircle />}
tone={stopped ? "default" : truncated ? "warning" : "error"}
label={
stopped
? t.stopped
: truncated
? dict.tools.truncated
: isLastMessage && engine.isBusy
? t.failedRetrying
: t.failed
}
detail={
stopped
? undefined
: truncated
? t.truncatedHint
: (errorText ??
(typeof output === "string" ? output : ""))
}
/>
)
}
// Finished without a version (sessions saved before versions existed)
return (
<ToolRow
part={part}
icon={<PenTool />}
label={toolName === "edit_diagram" ? t.edited : t.created}
/>
)
}
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"use client"
import type { UIMessage } from "ai"
import type { RefObject } from "react"
import { useCallback, useEffect, useRef } from "react"
import type { DiagramOperation, ToolPartLike } from "@/components/chat/types"
import { useDiagram } from "@/contexts/diagram-context"
import {
convertToLegalXml,
extractCompleteMxCells,
replaceNodes,
} from "@/lib/utils"
import { applyDiagramOperations } from "@/packages/mcp-server/src/diagram-operations.ts"
import { BLANK_MXFILE } from "@/packages/mcp-server/src/pages.ts"
// Helper to extract complete operations from streaming input
function getCompleteOperations(
operations: DiagramOperation[] | undefined,
): DiagramOperation[] {
if (!operations || !Array.isArray(operations)) return []
return operations.filter(
(op) =>
op &&
typeof op.operation === "string" &&
["update", "add", "delete"].includes(op.operation) &&
typeof op.cell_id === "string" &&
op.cell_id.length > 0 &&
(op.operation === "delete" || typeof op.new_xml === "string"),
)
}
interface UseDiagramStreamingParams {
messages: UIMessage[]
processedToolCallsRef: RefObject<Set<string>>
editDiagramOriginalXmlRef: RefObject<Map<string, string>>
loadedMessageIdsRef: RefObject<Set<string>>
}
/**
* Draws AI tool output onto the canvas while it streams, as a preview that
* is not recorded in undo history.
*
* display_diagram: the complete mxCells written so far. edit_diagram: the
* complete operations applied to the diagram from before the call. The tool
* handler validates and commits the final result. Runs in the chat engine
* so streaming continues while the chat panel is collapsed.
*/
export function useDiagramStreaming({
messages,
processedToolCallsRef,
editDiagramOriginalXmlRef,
loadedMessageIdsRef,
}: UseDiagramStreamingParams) {
const { chartXML, chartXMLRef, loadDiagram } = useDiagram()
const previousXML = useRef<string>("")
// Last processed XML per toolCallId, to skip redundant work while streaming
const lastProcessedXmlRef = useRef<Map<string, string>>(new Map())
// Reset when messages become empty (new chat or session switch), so
// cached examples work again after starting a new session
useEffect(() => {
if (messages.length === 0) {
previousXML.current = ""
lastProcessedXmlRef.current.clear()
processedToolCallsRef.current.clear()
editDiagramOriginalXmlRef.current.clear()
}
}, [messages.length, processedToolCallsRef, editDiagramOriginalXmlRef])
// Streaming preview of display_diagram: draw the complete cells written
// so far. The tool handler validates and loads the final diagram.
const handleDisplayChart = useCallback(
(xml: string) => {
const completeCells = extractCompleteMxCells(xml || "")
if (!completeCells) return
const convertedXml = convertToLegalXml(completeCells)
if (convertedXml === previousXML.current) return
// Skip this update while the cells written so far don't parse
const testDoc = new DOMParser().parseFromString(
`<root>${convertedXml}</root>`,
"text/xml",
)
if (testDoc.querySelector("parsererror")) return
try {
// Replace the first page's cells so other pages stay intact.
// An empty canvas gets a default mxfile to put the cells in.
const baseXML = chartXML || BLANK_MXFILE
const replacedXML = replaceNodes(baseXML, convertedXml)
previousXML.current = convertedXml
loadDiagram(replacedXML, true, "preview")
} catch (error) {
console.error("Error processing XML:", error)
}
},
[chartXML, loadDiagram],
)
useEffect(() => {
// Only the last message can still be streaming
const message = messages[messages.length - 1]
if (!message?.parts) return
// Messages restored from a saved session were applied before it was
// saved; the saved diagram is authoritative, so don't replay them
if (loadedMessageIdsRef.current.has(message.id)) return
// The diagram without streamed previews, as loaded last: the tool
// handler's result of an earlier edit is there before the chartXML
// state catches up. Undoing a failed edit's preview below changes it
// too, and an edit streaming right after must start from the undone
// diagram.
let baseXml = chartXMLRef.current
for (const part of message.parts) {
if (
part.type !== "tool-display_diagram" &&
part.type !== "tool-edit_diagram"
) {
continue
}
const { toolCallId, state, input } = part as ToolPartLike
// Failed or stopped: if the original XML is still stored, the
// tool handler never ran (invalid JSON, or the user pressed
// stop), so undo the streamed preview here. Invalid JSON leaves
// no input, so check this first.
if (state === "output-error") {
const originalXml =
editDiagramOriginalXmlRef.current.get(toolCallId)
if (originalXml) {
editDiagramOriginalXmlRef.current.delete(toolCallId)
loadDiagram(originalXml, true, "revert")
baseXml = originalXml
}
continue
}
// Input complete, or the tool handler, a stop or an error took
// the call already: the tool handler loads the checked diagram.
// The messages update at most every 150 ms (useChat throttle in
// the chat engine), so they can still show the call streaming
// after that.
if (
state !== "input-streaming" ||
processedToolCallsRef.current.has(toolCallId)
) {
processedToolCallsRef.current.add(toolCallId)
lastProcessedXmlRef.current.delete(toolCallId)
lastProcessedXmlRef.current.delete(`${toolCallId}-opCount`)
continue
}
if (part.type === "tool-display_diagram") {
const xml = input?.xml as string | undefined
// Skip if XML hasn't changed since last processing
if (!xml || lastProcessedXmlRef.current.get(toolCallId) === xml)
continue
// Keep the diagram from before the preview, to undo it on a
// stop or an error
if (!editDiagramOriginalXmlRef.current.has(toolCallId)) {
editDiagramOriginalXmlRef.current.set(
toolCallId,
baseXml || BLANK_MXFILE,
)
}
handleDisplayChart(xml)
lastProcessedXmlRef.current.set(toolCallId, xml)
continue
}
// edit_diagram: apply operations incrementally for a preview.
// editDiagramOriginalXmlRef is shared with the tool handler.
if (!input?.operations) continue
const completeOps = getCompleteOperations(
input.operations as DiagramOperation[],
)
if (completeOps.length === 0) continue
// Capture the original XML when streaming starts
if (!editDiagramOriginalXmlRef.current.has(toolCallId)) {
if (!baseXml) {
console.warn(
"[edit_diagram streaming] No chart XML available",
)
continue
}
editDiagramOriginalXmlRef.current.set(toolCallId, baseXml)
}
const originalXml =
editDiagramOriginalXmlRef.current.get(toolCallId)
if (!originalXml) continue
// Skip if no change from last processed state
const countKey = `${toolCallId}-opCount`
const opCount = String(completeOps.length)
if (lastProcessedXmlRef.current.get(countKey) === opCount) continue
try {
const { result } = applyDiagramOperations(
originalXml,
completeOps,
)
// Load the full document so other pages stay intact
loadDiagram(result, true, "preview")
lastProcessedXmlRef.current.set(countKey, opCount)
} catch (e) {
console.warn(
"[edit_diagram streaming] Operation failed:",
e instanceof Error ? e.message : e,
)
}
}
}, [
messages,
handleDisplayChart,
chartXMLRef,
loadDiagram,
processedToolCallsRef,
editDiagramOriginalXmlRef,
loadedMessageIdsRef,
])
}
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import type { RefObject } from "react"
import { useEffect, useRef } from "react"
import { toast } from "sonner"
import { useDiagram } from "@/contexts/diagram-context"
import { useDictionary } from "@/hooks/use-dictionary"
import { diffDiagrams, isSameDocument } from "@/lib/diagram-diff"
import { clearHighlights, highlightCells } from "@/lib/drawio/editor-bridge"
import { formatMessage } from "@/lib/i18n/utils"
import { BLANK_MXFILE } from "@/packages/mcp-server/src/pages.ts"
import { useVersionsStore } from "@/stores/versions-store"
interface UseVersionsParams {
/** Index of the user message whose turn is running */
currentTurnRef: RefObject<number>
isBusy: boolean
/** Live busy state, for the restore toast's Undo that runs later */
isTurnActive: () => boolean
/** Changes when another chat comes on screen */
getChatGeneration: () => number
}
/**
* Turns every committed AI change into a version (card in the chat), marks
* the changed shapes on the canvas, and restores or undoes versions.
*/
export function useVersions({
currentTurnRef,
isBusy,
isTurnActive,
getChatGeneration,
}: UseVersionsParams) {
const dict = useDictionary()
// chartXML changes with hand edits, undo and loads; the ref is the
// document on the canvas now
const {
loadDiagram,
getVersionSvg,
setCommitHandler,
chartXML,
chartXMLRef,
} = useDiagram()
// A restore commits too; that path must not add a version
const restoringRef = useRef(false)
// Registered once: re-registering on every render would leave a gap
// (effect cleanups run before the streaming hook commits). The handler
// only reads refs and stable functions.
useEffect(() => {
setCommitHandler(({ beforeXml, afterXml, toolCallId }) => {
if (restoringRef.current) return
const { summary, touchedIds, fromScratch } = diffDiagrams(
beforeXml,
afterXml,
)
const id = useVersionsStore.getState().addVersion({
xml: afterXml,
beforeXml,
turnIndex: currentTurnRef.current,
toolCallId,
summary,
fromScratch,
})
// Mark what changed, unless the whole diagram is new
if (!fromScratch) {
setTimeout(() => {
const marker = getComputedStyle(document.documentElement)
.getPropertyValue("--marker")
.trim()
highlightCells(touchedIds, marker || "#ffd84d")
}, 60)
}
// The picture is of the canvas: take it right away, before a
// newer version can be on it; once one is, this one gets none
// rather than the newer one's
const isNewest = () =>
useVersionsStore.getState().versions.at(-1)?.id === id
setTimeout(async () => {
const svg = isNewest() ? await getVersionSvg() : null
useVersionsStore
.getState()
.updateVersion(id, { svg: svg && isNewest() ? svg : "" })
}, 0)
})
return () => setCommitHandler(null)
}, [])
// A version is on the canvas (or its change undone) while the canvas
// holds that XML. Hand edits, Ctrl+Z or a new page end it, with an
// external draw.io too. Checked once an answer is done: its previews
// change the canvas on the way.
useEffect(() => {
if (isBusy || isTurnActive() || !chartXML) return
const store = useVersionsStore.getState()
const id = store.onCanvasVersionId ?? store.undoneVersionId
const version = store.versions.find((v) => v.id === id)
if (!version) return
const shown =
id === store.onCanvasVersionId
? version.xml
: version.beforeXml || BLANK_MXFILE
if (isSameDocument(shown, chartXML)) return
store.clearCanvasFlags()
// Its Undo would also take the changes made since away
toast.dismiss("version-restored")
}, [chartXML, isBusy])
const apply = (xml: string) => {
restoringRef.current = true
try {
loadDiagram(xml, true, "commit")
} finally {
restoringRef.current = false
}
clearHighlights()
}
const restoreVersion = (versionId: string) => {
if (isTurnActive()) return
const store = useVersionsStore.getState()
const index = store.versions.findIndex((v) => v.id === versionId)
if (index < 0) return
// The canvas before the restore, to go back to it: a multi-page
// document is loaded in full, which Ctrl+Z cannot undo
const before = chartXMLRef.current
const wasOnCanvas = store.onCanvasVersionId
const wasUndone = store.undoneVersionId
const generation = getChatGeneration()
apply(store.versions[index].xml)
store.setOnCanvas(versionId)
toast.success(
formatMessage(dict.versions.restoredVersion, { n: index + 1 }),
{
id: "version-restored",
duration: 8000,
action: {
label: dict.versions.undoRestore,
onClick: () => {
// Another chat is on screen, or an answer is
// changing the canvas: the old canvas is not theirs
if (!before || isTurnActive()) return
if (getChatGeneration() !== generation) return
apply(before)
const now = useVersionsStore.getState()
if (wasUndone) now.setUndone(wasUndone)
else if (wasOnCanvas) now.setOnCanvas(wasOnCanvas)
},
},
},
)
}
/** Undo the change of the latest version, or redo it when undone */
const undoVersion = (versionId: string) => {
if (isTurnActive()) return
const store = useVersionsStore.getState()
const version = store.versions.find((v) => v.id === versionId)
if (!version) return
if (store.undoneVersionId === versionId) {
apply(version.xml)
store.setOnCanvas(versionId)
return
}
if (version.beforeXml === undefined) return
apply(version.beforeXml || BLANK_MXFILE)
store.setUndone(versionId)
}
return { restoreVersion, undoVersion }
}
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import { useEffect, useRef } from "react"
import { useDictionary } from "@/hooks/use-dictionary"
import { cn } from "@/lib/utils"
import { useUiStore } from "@/stores/ui-store"
import { useVersionsStore } from "@/stores/versions-store"
import { useChatEngine } from "./chat-engine"
/** Row of version thumbnails under the panel header; click to compare */
export function VersionStrip() {
const dict = useDictionary()
const versions = useVersionsStore((s) => s.versions)
const onCanvasVersionId = useVersionsStore((s) => s.onCanvasVersionId)
const openCompare = useUiStore((s) => s.openCompare)
const engine = useChatEngine()
const scrollRef = useRef<HTMLDivElement>(null)
// Keep the newest version in view
useEffect(() => {
const el = scrollRef.current
if (el) el.scrollTo({ left: el.scrollWidth, behavior: "smooth" })
}, [versions.length])
// Versions with no card in the chat: saved by older app versions, from
// a turn that was retried, or drawn by a call that then failed its
// screenshot check (a call still running gets its card when done)
const hasCardless = versions.some(
(v) =>
!v.toolCallId ||
!engine.messages.some((m) =>
m.parts?.some((p) => {
const part = p as { toolCallId?: string; state?: string }
return (
part.toolCallId === v.toolCallId &&
part.state !== "output-error"
)
}),
),
)
// One version with a card: the strip adds nothing to it
if (versions.length < 2 && !hasCardless) return null
return (
<div className="flex items-center gap-2 border-b border-border px-3.5 pt-1 pb-3">
<span className="shrink-0 text-xs text-muted-foreground">
{dict.versions.strip}
</span>
<div
ref={scrollRef}
className="flex min-w-0 flex-1 gap-1.5 overflow-x-auto p-1 scrollbar-thin"
>
{versions.map((version, index) => {
const isCurrent = version.id === onCanvasVersionId
return (
<button
key={version.id}
type="button"
onClick={() => openCompare(version.id)}
title={`v${index + 1}${version.id === onCanvasVersionId ? ` · ${dict.versions.currentCanvas}` : ""}`}
className={cn(
"sheet-light relative flex h-12 w-[72px] shrink-0 items-center justify-center overflow-hidden rounded-lg border border-border bg-white transition-colors hover:border-foreground/30",
// An outline with a gap reads on the white
// picture in both themes
isCurrent &&
"outline-2 outline-offset-2 outline-foreground",
)}
data-testid="version-thumb"
>
{version.svg && (
// biome-ignore lint/performance/noImgElement: data URL thumbnail
<img
src={version.svg}
alt=""
className="max-h-9 max-w-[62px] object-contain"
/>
)}
<span
className={cn(
"absolute bottom-0.5 left-1 text-[10px] font-medium tabular-nums text-neutral-500",
isCurrent &&
"font-semibold text-neutral-900",
)}
>
v{index + 1}
</span>
</button>
)
})}
</div>
</div>
)
}