| 1 | import { memo, type RefObject, useCallback, useEffect, useId, useLayoutEffect, useMemo, useRef, useState } from "react"; |
| 2 | import { createPortal } from "react-dom"; |
| 3 | import { AlertCircle, Code2, Maximize2, Minimize2, Play, RotateCcw, ZoomIn, ZoomOut } from "lucide-react"; |
| 4 | import { CopyButton } from "./CopyButton"; |
| 5 | import { createMermaidPanZoom, type MermaidPanZoomInstance, type MermaidPanZoomOptions } from "./mermaidPanZoom"; |
| 6 | import { openExternal } from "../lib/bridge"; |
| 7 | import { markdownImageSource } from "../lib/markdownImage"; |
| 8 | import { useT } from "../lib/i18n"; |
| 9 | |
| 10 | interface MermaidDiagramProps { |
| 11 | definition: string; |
| 12 | } |
| 13 | |
| 14 | type DiagramState = |
| 15 | | { status: "loading" } |
| 16 | | { status: "rendered"; svg: string } |
| 17 | | { status: "error"; message: string }; |
| 18 | |
| 19 | type DiagramTab = "preview" | "code"; |
| 20 | type MermaidThemeName = "dark" | "light"; |
| 21 | type MermaidModule = typeof import("mermaid"); |
| 22 | type MermaidApi = MermaidModule["default"]; |
| 23 | type MermaidRenderAdapter = ( |
| 24 | svgId: string, |
| 25 | definition: string, |
| 26 | theme: MermaidThemeName, |
| 27 | signal: AbortSignal, |
| 28 | ) => Promise<string>; |
| 29 | |
| 30 | type PanZoomInstance = MermaidPanZoomInstance; |
| 31 | |
| 32 | type PanZoomFactory = (svg: SVGSVGElement, options?: MermaidPanZoomOptions) => PanZoomInstance; |
| 33 | |
| 34 | const MAX_TEXT_SIZE = 100000; |
| 35 | const MIN_ZOOM = 0.3; |
| 36 | const MAX_ZOOM = 8; |
| 37 | const SAFE_LINK_PROTOCOLS = new Set(["http:", "https:", "mailto:"]); |
| 38 | const XLINK_NS = "http://www.w3.org/1999/xlink"; |
| 39 | |
| 40 | let mermaidApi: MermaidApi | null = null; |
| 41 | let initPromise: Promise<MermaidApi> | null = null; |
| 42 | let renderQueue: Promise<void> = Promise.resolve(); |
| 43 | let renderAdapterForTest: MermaidRenderAdapter | null = null; |
| 44 | let panZoomFactoryForTest: PanZoomFactory | null | undefined; |
| 45 | |
| 46 | export function __setMermaidRenderAdapterForTest(adapter: MermaidRenderAdapter | null): void { |
| 47 | renderAdapterForTest = adapter; |
| 48 | renderQueue = Promise.resolve(); |
| 49 | } |
| 50 | |
| 51 | export function __setMermaidPanZoomFactoryForTest(factory: PanZoomFactory | null | undefined): void { |
| 52 | panZoomFactoryForTest = factory; |
| 53 | } |
| 54 | |
| 55 | function mermaidThemeVariables(theme: MermaidThemeName): Record<string, string | number | boolean> { |
| 56 | if (theme === "dark") { |
| 57 | return { |
| 58 | darkMode: true, |
| 59 | background: "#111319", |
| 60 | fontSize: "13px", |
| 61 | fontFamily: "ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif", |
| 62 | primaryColor: "#1f2937", |
| 63 | primaryTextColor: "#f4f5f7", |
| 64 | primaryBorderColor: "#374151", |
| 65 | mainBkg: "#1f2937", |
| 66 | nodeBkg: "#1f2937", |
| 67 | nodeBorder: "#374151", |
| 68 | nodeTextColor: "#f4f5f7", |
| 69 | stateBkg: "#1f2937", |
| 70 | stateBorder: "#374151", |
| 71 | stateLabelColor: "#f4f5f7", |
| 72 | labelColor: "#d1d5db", |
| 73 | lineColor: "#6b7280", |
| 74 | textColor: "#d1d5db", |
| 75 | defaultLinkColor: "#6b7280", |
| 76 | edgeLabelBackground: "#111319", |
| 77 | clusterBkg: "#0f172a", |
| 78 | clusterBorder: "#374151", |
| 79 | actorBkg: "#1f2937", |
| 80 | actorBorder: "#374151", |
| 81 | actorTextColor: "#f4f5f7", |
| 82 | actorLineColor: "#4b5563", |
| 83 | signalColor: "#d1d5db", |
| 84 | signalTextColor: "#f4f5f7", |
| 85 | labelBoxBkgColor: "#1f2937", |
| 86 | labelBoxBorderColor: "#374151", |
| 87 | labelTextColor: "#f4f5f7", |
| 88 | loopTextColor: "#f4f5f7", |
| 89 | noteBkgColor: "#0f172a", |
| 90 | noteBorderColor: "#374151", |
| 91 | noteTextColor: "#e5e7eb", |
| 92 | classText: "#f4f5f7", |
| 93 | classBorder: "#374151", |
| 94 | classBkg: "#1f2937", |
| 95 | secondaryColor: "#111319", |
| 96 | tertiaryColor: "#1f2937", |
| 97 | }; |
| 98 | } |
| 99 | return { |
| 100 | darkMode: false, |
| 101 | background: "#ffffff", |
| 102 | fontSize: "13px", |
| 103 | fontFamily: "ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif", |
| 104 | primaryColor: "#f8fafc", |
| 105 | primaryTextColor: "#0f172a", |
| 106 | primaryBorderColor: "#cbd5e1", |
| 107 | mainBkg: "#f8fafc", |
| 108 | nodeBkg: "#f8fafc", |
| 109 | nodeBorder: "#cbd5e1", |
| 110 | nodeTextColor: "#0f172a", |
| 111 | stateBkg: "#f8fafc", |
| 112 | stateBorder: "#cbd5e1", |
| 113 | stateLabelColor: "#0f172a", |
| 114 | labelColor: "#475569", |
| 115 | lineColor: "#94a3b8", |
| 116 | textColor: "#475569", |
| 117 | defaultLinkColor: "#94a3b8", |
| 118 | edgeLabelBackground: "#ffffff", |
| 119 | clusterBkg: "#f1f5f9", |
| 120 | clusterBorder: "#e2e8f0", |
| 121 | actorBkg: "#f8fafc", |
| 122 | actorBorder: "#cbd5e1", |
| 123 | actorTextColor: "#0f172a", |
| 124 | actorLineColor: "#cbd5e1", |
| 125 | signalColor: "#475569", |
| 126 | signalTextColor: "#0f172a", |
| 127 | labelBoxBkgColor: "#f8fafc", |
| 128 | labelBoxBorderColor: "#cbd5e1", |
| 129 | labelTextColor: "#0f172a", |
| 130 | loopTextColor: "#0f172a", |
| 131 | noteBkgColor: "#f1f5f9", |
| 132 | noteBorderColor: "#e2e8f0", |
| 133 | noteTextColor: "#334155", |
| 134 | classText: "#0f172a", |
| 135 | classBorder: "#cbd5e1", |
| 136 | classBkg: "#f8fafc", |
| 137 | secondaryColor: "#f1f5f9", |
| 138 | tertiaryColor: "#f8fafc", |
| 139 | }; |
| 140 | } |
| 141 | |
| 142 | function mermaidConfigForTheme(theme: MermaidThemeName) { |
| 143 | return { |
| 144 | startOnLoad: false, |
| 145 | theme: "base" as const, |
| 146 | securityLevel: "antiscript" as const, |
| 147 | maxTextSize: MAX_TEXT_SIZE, |
| 148 | fontFamily: "ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif", |
| 149 | flowchart: { htmlLabels: false }, |
| 150 | themeVariables: mermaidThemeVariables(theme), |
| 151 | }; |
| 152 | } |
| 153 | |
| 154 | async function ensureMermaid(theme: MermaidThemeName): Promise<MermaidApi> { |
| 155 | if (mermaidApi) { |
| 156 | mermaidApi.initialize(mermaidConfigForTheme(theme)); |
| 157 | return mermaidApi; |
| 158 | } |
| 159 | if (!initPromise) { |
| 160 | initPromise = import("mermaid").then((mod) => { |
| 161 | mermaidApi = mod.default; |
| 162 | mermaidApi.initialize(mermaidConfigForTheme(theme)); |
| 163 | return mermaidApi; |
| 164 | }).catch((err) => { |
| 165 | initPromise = null; |
| 166 | mermaidApi = null; |
| 167 | throw err; |
| 168 | }); |
| 169 | } |
| 170 | const api = await initPromise; |
| 171 | api.initialize(mermaidConfigForTheme(theme)); |
| 172 | return api; |
| 173 | } |
| 174 | |
| 175 | function queuedRender( |
| 176 | svgId: string, |
| 177 | definition: string, |
| 178 | theme: MermaidThemeName, |
| 179 | signal: AbortSignal, |
| 180 | ): Promise<string> { |
| 181 | const promise = renderQueue.then(async () => { |
| 182 | if (signal.aborted) throw new DOMException("Aborted", "AbortError"); |
| 183 | const api = await ensureMermaid(theme); |
| 184 | if (signal.aborted) throw new DOMException("Aborted", "AbortError"); |
| 185 | const { svg } = await api.render(svgId, definition); |
| 186 | if (signal.aborted) throw new DOMException("Aborted", "AbortError"); |
| 187 | return svg; |
| 188 | }); |
| 189 | renderQueue = promise.then(() => {}, () => {}); |
| 190 | return promise; |
| 191 | } |
| 192 | |
| 193 | async function renderMermaid( |
| 194 | svgId: string, |
| 195 | definition: string, |
| 196 | theme: MermaidThemeName, |
| 197 | signal: AbortSignal, |
| 198 | ): Promise<string> { |
| 199 | if (renderAdapterForTest) return renderAdapterForTest(svgId, definition, theme, signal); |
| 200 | return queuedRender(svgId, definition, theme, signal); |
| 201 | } |
| 202 | |
| 203 | async function ensurePanZoomFactory(): Promise<PanZoomFactory | null> { |
| 204 | if (panZoomFactoryForTest !== undefined) return panZoomFactoryForTest; |
| 205 | return createMermaidPanZoom; |
| 206 | } |
| 207 | |
| 208 | export function isSafeMermaidHref(href: string | null | undefined): boolean { |
| 209 | const value = href?.trim(); |
| 210 | if (!value) return false; |
| 211 | if (value.startsWith("#")) return true; |
| 212 | try { |
| 213 | return SAFE_LINK_PROTOCOLS.has(new URL(value).protocol); |
| 214 | } catch { |
| 215 | return false; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | export function isOpenableMermaidHref(href: string | null | undefined): boolean { |
| 220 | const value = href?.trim(); |
| 221 | return Boolean(value && !value.startsWith("#") && isSafeMermaidHref(value)); |
| 222 | } |
| 223 | |
| 224 | export function getMermaidAnchorHref(anchor: Element): string | null { |
| 225 | return anchor.getAttribute("href") |
| 226 | ?? anchor.getAttribute("xlink:href") |
| 227 | ?? anchor.getAttributeNS(XLINK_NS, "href"); |
| 228 | } |
| 229 | |
| 230 | export function sanitizeMermaidSvg(svg: string): string { |
| 231 | if (typeof DOMParser === "undefined" || typeof XMLSerializer === "undefined") return svg; |
| 232 | const doc = new DOMParser().parseFromString(svg, "image/svg+xml"); |
| 233 | const svgEl = doc.documentElement; |
| 234 | if (svgEl.localName.toLowerCase() !== "svg") return svg; |
| 235 | |
| 236 | const elements = [svgEl, ...Array.from(svgEl.querySelectorAll("*"))]; |
| 237 | const toRemove: Element[] = []; |
| 238 | |
| 239 | for (const element of elements) { |
| 240 | const name = element.localName.toLowerCase(); |
| 241 | if (name === "script" || name === "iframe" || name === "object" || name === "embed") { |
| 242 | toRemove.push(element); |
| 243 | continue; |
| 244 | } |
| 245 | for (const attr of Array.from(element.attributes)) { |
| 246 | const attrName = attr.name; |
| 247 | const localName = attr.localName.toLowerCase(); |
| 248 | if (/^on/i.test(attrName)) { |
| 249 | element.removeAttribute(attrName); |
| 250 | continue; |
| 251 | } |
| 252 | if (localName === "href") { |
| 253 | if (!isSafeMermaidHref(attr.value)) { |
| 254 | element.removeAttribute(attrName); |
| 255 | continue; |
| 256 | } |
| 257 | if (name === "image" || name === "feimage") { |
| 258 | attr.value = markdownImageSource(attr.value); |
| 259 | } else if (name === "use" && !attr.value.trim().startsWith("#")) { |
| 260 | // External <use> references can load arbitrary SVG documents. Mermaid |
| 261 | // only needs local fragment references, so keep those and drop the rest. |
| 262 | element.removeAttribute(attrName); |
| 263 | } |
| 264 | } |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | for (const element of toRemove) element.parentNode?.removeChild(element); |
| 269 | return new XMLSerializer().serializeToString(svgEl); |
| 270 | } |
| 271 | |
| 272 | export function resolveMermaidTheme(): MermaidThemeName { |
| 273 | if (typeof document === "undefined") return "dark"; |
| 274 | const forced = document.documentElement.getAttribute("data-theme"); |
| 275 | if (forced === "light" || forced === "dark") return forced; |
| 276 | return window.matchMedia("(prefers-color-scheme: light)").matches ? "light" : "dark"; |
| 277 | } |
| 278 | |
| 279 | function useMermaidTheme(): MermaidThemeName { |
| 280 | const [theme, setTheme] = useState<MermaidThemeName>(resolveMermaidTheme); |
| 281 | |
| 282 | useEffect(() => { |
| 283 | const html = document.documentElement; |
| 284 | const updateTheme = () => setTheme(resolveMermaidTheme()); |
| 285 | const observer = new MutationObserver(updateTheme); |
| 286 | observer.observe(html, { attributeFilter: ["data-theme", "data-theme-mode"] }); |
| 287 | |
| 288 | const mq = window.matchMedia("(prefers-color-scheme: light)"); |
| 289 | mq.addEventListener("change", updateTheme); |
| 290 | return () => { |
| 291 | observer.disconnect(); |
| 292 | mq.removeEventListener("change", updateTheme); |
| 293 | }; |
| 294 | }, []); |
| 295 | |
| 296 | return theme; |
| 297 | } |
| 298 | |
| 299 | function destroyPanZoom(instance: PanZoomInstance | null): void { |
| 300 | if (!instance) return; |
| 301 | try { |
| 302 | instance.destroy(); |
| 303 | } catch { |
| 304 | /* pan/zoom listener cleanup is best-effort across browser and test DOMs. */ |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | function panZoomLayoutReady(container: HTMLElement): boolean { |
| 309 | const rect = container.getBoundingClientRect(); |
| 310 | return Number.isFinite(rect.width) && Number.isFinite(rect.height) && rect.width > 0 && rect.height > 0; |
| 311 | } |
| 312 | |
| 313 | export function safelyRunPanZoom(instance: PanZoomInstance | null, action: () => void): boolean { |
| 314 | if (!instance) return false; |
| 315 | try { |
| 316 | action(); |
| 317 | return true; |
| 318 | } catch { |
| 319 | // Pan/zoom math reads live layout (getBoundingClientRect); a detached or |
| 320 | // zero-sized surface must never reach the global crash surface (#8068). |
| 321 | return false; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | export function safelySyncPanZoom(instance: PanZoomInstance | null, container: HTMLElement | null): boolean { |
| 326 | if (!instance || !container || !panZoomLayoutReady(container)) return false; |
| 327 | return safelyRunPanZoom(instance, () => { |
| 328 | instance.resize(); |
| 329 | instance.fit(); |
| 330 | instance.center(); |
| 331 | }); |
| 332 | } |
| 333 | |
| 334 | const MermaidDiagram = memo(function MermaidDiagram({ definition }: MermaidDiagramProps) { |
| 335 | const [state, setState] = useState<DiagramState>({ status: "loading" }); |
| 336 | const [tab, setTab] = useState<DiagramTab>("preview"); |
| 337 | const [fullscreen, setFullscreen] = useState(false); |
| 338 | const [portalTarget, setPortalTarget] = useState<Element | null>(null); |
| 339 | const theme = useMermaidTheme(); |
| 340 | const instanceId = useId().replace(/[^a-zA-Z0-9_-]/g, "-"); |
| 341 | const svgId = `mermaid-${instanceId}`; |
| 342 | const previewRef = useRef<HTMLDivElement>(null); |
| 343 | const panZoomRef = useRef<PanZoomInstance | null>(null); |
| 344 | const mountedRef = useRef(true); |
| 345 | const source = useMemo(() => definition.replace(/\n$/, ""), [definition]); |
| 346 | |
| 347 | useEffect(() => { |
| 348 | mountedRef.current = true; |
| 349 | const controller = new AbortController(); |
| 350 | setState({ status: "loading" }); |
| 351 | |
| 352 | (async () => { |
| 353 | try { |
| 354 | const trimmed = source.trim(); |
| 355 | if (!trimmed) { |
| 356 | setState({ status: "error", message: "Empty diagram definition" }); |
| 357 | return; |
| 358 | } |
| 359 | const rendered = await renderMermaid(svgId, trimmed, theme, controller.signal); |
| 360 | if (controller.signal.aborted || !mountedRef.current) return; |
| 361 | setState({ status: "rendered", svg: sanitizeMermaidSvg(rendered) }); |
| 362 | } catch (err) { |
| 363 | if (err instanceof DOMException && err.name === "AbortError") return; |
| 364 | if (controller.signal.aborted || !mountedRef.current) return; |
| 365 | const message = err instanceof Error ? err.message : String(err); |
| 366 | setState({ status: "error", message }); |
| 367 | } |
| 368 | })(); |
| 369 | |
| 370 | return () => { |
| 371 | controller.abort(); |
| 372 | mountedRef.current = false; |
| 373 | }; |
| 374 | }, [source, svgId, theme]); |
| 375 | |
| 376 | useLayoutEffect(() => { |
| 377 | if (tab !== "preview" || state.status !== "rendered") return; |
| 378 | const container = previewRef.current; |
| 379 | if (!container) return; |
| 380 | |
| 381 | let cancelled = false; |
| 382 | let raf = 0; |
| 383 | let syncRaf = 0; |
| 384 | let resizeObserver: ResizeObserver | null = null; |
| 385 | let instance: PanZoomInstance | null = null; |
| 386 | |
| 387 | const queueSync = () => { |
| 388 | if (syncRaf) window.cancelAnimationFrame(syncRaf); |
| 389 | let attempts = 0; |
| 390 | const sync = () => { |
| 391 | syncRaf = 0; |
| 392 | if (cancelled || panZoomRef.current !== instance) return; |
| 393 | attempts += 1; |
| 394 | if (!safelySyncPanZoom(instance, container) && attempts < 4) { |
| 395 | syncRaf = window.requestAnimationFrame(sync); |
| 396 | } |
| 397 | }; |
| 398 | syncRaf = window.requestAnimationFrame(sync); |
| 399 | }; |
| 400 | |
| 401 | void ensurePanZoomFactory().then((factory) => { |
| 402 | if (cancelled || !factory) return; |
| 403 | raf = window.requestAnimationFrame(() => { |
| 404 | const svg = container.querySelector("svg") as SVGSVGElement | null; |
| 405 | if (cancelled || !svg) return; |
| 406 | svg.removeAttribute("width"); |
| 407 | svg.removeAttribute("height"); |
| 408 | svg.style.width = "100%"; |
| 409 | svg.style.height = "100%"; |
| 410 | svg.style.maxWidth = "none"; |
| 411 | |
| 412 | destroyPanZoom(panZoomRef.current); |
| 413 | try { |
| 414 | instance = factory(svg, { |
| 415 | minZoom: MIN_ZOOM, |
| 416 | maxZoom: MAX_ZOOM, |
| 417 | zoomScaleSensitivity: 0.3, |
| 418 | }); |
| 419 | panZoomRef.current = instance; |
| 420 | queueSync(); |
| 421 | if (typeof ResizeObserver !== "undefined") { |
| 422 | resizeObserver = new ResizeObserver(queueSync); |
| 423 | resizeObserver.observe(container); |
| 424 | } |
| 425 | } catch { |
| 426 | instance = null; |
| 427 | panZoomRef.current = null; |
| 428 | } |
| 429 | }); |
| 430 | }); |
| 431 | |
| 432 | return () => { |
| 433 | cancelled = true; |
| 434 | if (raf) window.cancelAnimationFrame(raf); |
| 435 | if (syncRaf) window.cancelAnimationFrame(syncRaf); |
| 436 | resizeObserver?.disconnect(); |
| 437 | if (panZoomRef.current === instance) panZoomRef.current = null; |
| 438 | destroyPanZoom(instance); |
| 439 | }; |
| 440 | }, [state, tab, fullscreen]); |
| 441 | |
| 442 | useEffect(() => { |
| 443 | if (!fullscreen) return; |
| 444 | const onKeyDown = (event: KeyboardEvent) => { |
| 445 | if (event.key === "Escape") { |
| 446 | setFullscreen(false); |
| 447 | setPortalTarget(null); |
| 448 | } |
| 449 | }; |
| 450 | document.addEventListener("keydown", onKeyDown); |
| 451 | return () => document.removeEventListener("keydown", onKeyDown); |
| 452 | }, [fullscreen]); |
| 453 | |
| 454 | useEffect(() => { |
| 455 | if (!fullscreen || !panZoomRef.current) return; |
| 456 | const raf = window.requestAnimationFrame(() => { |
| 457 | safelySyncPanZoom(panZoomRef.current, previewRef.current); |
| 458 | }); |
| 459 | return () => window.cancelAnimationFrame(raf); |
| 460 | }, [fullscreen]); |
| 461 | |
| 462 | const toggleFullscreen = useCallback(() => { |
| 463 | setFullscreen((current) => { |
| 464 | const next = !current; |
| 465 | setPortalTarget(next ? document.querySelector(".chat-pane") ?? document.body : null); |
| 466 | return next; |
| 467 | }); |
| 468 | }, []); |
| 469 | |
| 470 | const zoomIn = useCallback(() => { |
| 471 | const instance = panZoomRef.current; |
| 472 | safelyRunPanZoom(instance, () => instance?.zoomIn()); |
| 473 | }, []); |
| 474 | |
| 475 | const zoomOut = useCallback(() => { |
| 476 | const instance = panZoomRef.current; |
| 477 | safelyRunPanZoom(instance, () => instance?.zoomOut()); |
| 478 | }, []); |
| 479 | |
| 480 | const resetZoom = useCallback(() => { |
| 481 | const instance = panZoomRef.current; |
| 482 | if (!instance) return; |
| 483 | safelyRunPanZoom(instance, () => instance.reset()); |
| 484 | safelySyncPanZoom(instance, previewRef.current); |
| 485 | }, []); |
| 486 | |
| 487 | const body = ( |
| 488 | <MermaidBody |
| 489 | state={state} |
| 490 | source={source} |
| 491 | tab={tab} |
| 492 | previewRef={previewRef} |
| 493 | /> |
| 494 | ); |
| 495 | |
| 496 | const content = ( |
| 497 | <div data-app-overlay={fullscreen ? "" : undefined} className={[ |
| 498 | "mermaid-diagram", |
| 499 | state.status === "error" ? "mermaid-diagram--error" : "", |
| 500 | fullscreen ? "mermaid-diagram--fullscreen" : "", |
| 501 | ].filter(Boolean).join(" ")}> |
| 502 | <MermaidToolbar |
| 503 | tab={tab} |
| 504 | source={source} |
| 505 | fullscreen={fullscreen} |
| 506 | onTabChange={setTab} |
| 507 | onFullscreenToggle={toggleFullscreen} |
| 508 | onZoomIn={zoomIn} |
| 509 | onZoomOut={zoomOut} |
| 510 | onResetZoom={resetZoom} |
| 511 | /> |
| 512 | {body} |
| 513 | </div> |
| 514 | ); |
| 515 | |
| 516 | if (fullscreen && portalTarget) { |
| 517 | return ( |
| 518 | <> |
| 519 | <div className="mermaid-diagram mermaid-diagram--placeholder" aria-hidden="true" /> |
| 520 | {createPortal(content, portalTarget)} |
| 521 | </> |
| 522 | ); |
| 523 | } |
| 524 | |
| 525 | return content; |
| 526 | }); |
| 527 | |
| 528 | function MermaidToolbar({ |
| 529 | tab, |
| 530 | source, |
| 531 | fullscreen, |
| 532 | onTabChange, |
| 533 | onFullscreenToggle, |
| 534 | onZoomIn, |
| 535 | onZoomOut, |
| 536 | onResetZoom, |
| 537 | }: { |
| 538 | tab: DiagramTab; |
| 539 | source: string; |
| 540 | fullscreen: boolean; |
| 541 | onTabChange: (tab: DiagramTab) => void; |
| 542 | onFullscreenToggle: () => void; |
| 543 | onZoomIn: () => void; |
| 544 | onZoomOut: () => void; |
| 545 | onResetZoom: () => void; |
| 546 | }) { |
| 547 | return ( |
| 548 | <div className="mermaid-diagram__toolbar"> |
| 549 | <div className="mermaid-diagram__title" aria-hidden="true">Mermaid</div> |
| 550 | <div className="mermaid-diagram__actions"> |
| 551 | <button |
| 552 | type="button" |
| 553 | className={`mermaid-diagram__icon-btn${tab === "preview" ? " mermaid-diagram__icon-btn--active" : ""}`} |
| 554 | onClick={() => onTabChange("preview")} |
| 555 | aria-label="Preview diagram" |
| 556 | title="Preview diagram" |
| 557 | > |
| 558 | <Play size={14} /> |
| 559 | </button> |
| 560 | <button |
| 561 | type="button" |
| 562 | className={`mermaid-diagram__icon-btn${tab === "code" ? " mermaid-diagram__icon-btn--active" : ""}`} |
| 563 | onClick={() => onTabChange("code")} |
| 564 | aria-label="Show diagram source" |
| 565 | title="Show diagram source" |
| 566 | > |
| 567 | <Code2 size={14} /> |
| 568 | </button> |
| 569 | <button |
| 570 | type="button" |
| 571 | className="mermaid-diagram__icon-btn mermaid-diagram__zoom-action" |
| 572 | onClick={onZoomOut} |
| 573 | aria-label="Zoom out" |
| 574 | title="Zoom out" |
| 575 | > |
| 576 | <ZoomOut size={14} /> |
| 577 | </button> |
| 578 | <button |
| 579 | type="button" |
| 580 | className="mermaid-diagram__icon-btn mermaid-diagram__zoom-action" |
| 581 | onClick={onZoomIn} |
| 582 | aria-label="Zoom in" |
| 583 | title="Zoom in" |
| 584 | > |
| 585 | <ZoomIn size={14} /> |
| 586 | </button> |
| 587 | <button |
| 588 | type="button" |
| 589 | className="mermaid-diagram__icon-btn mermaid-diagram__zoom-action" |
| 590 | onClick={onResetZoom} |
| 591 | aria-label="Reset zoom" |
| 592 | title="Reset zoom" |
| 593 | > |
| 594 | <RotateCcw size={14} /> |
| 595 | </button> |
| 596 | <CopyButton text={source} className="mermaid-diagram__copy-btn" showInlineLabel={false} /> |
| 597 | <button |
| 598 | type="button" |
| 599 | className="mermaid-diagram__icon-btn" |
| 600 | onClick={onFullscreenToggle} |
| 601 | aria-label={fullscreen ? "Exit fullscreen" : "Open fullscreen"} |
| 602 | title={fullscreen ? "Exit fullscreen" : "Open fullscreen"} |
| 603 | > |
| 604 | {fullscreen ? <Minimize2 size={14} /> : <Maximize2 size={14} />} |
| 605 | </button> |
| 606 | </div> |
| 607 | </div> |
| 608 | ); |
| 609 | } |
| 610 | |
| 611 | function MermaidBody({ |
| 612 | state, |
| 613 | source, |
| 614 | tab, |
| 615 | previewRef, |
| 616 | }: { |
| 617 | state: DiagramState; |
| 618 | source: string; |
| 619 | tab: DiagramTab; |
| 620 | previewRef: RefObject<HTMLDivElement | null>; |
| 621 | }) { |
| 622 | const t = useT(); |
| 623 | if (tab === "code") { |
| 624 | return ( |
| 625 | <pre className="code hljs mermaid-diagram__code" data-lang="mermaid"> |
| 626 | <code>{source}</code> |
| 627 | </pre> |
| 628 | ); |
| 629 | } |
| 630 | |
| 631 | if (state.status === "loading") { |
| 632 | return ( |
| 633 | <div className="mermaid-diagram__loading"> |
| 634 | <span className="mermaid-diagram__spinner" /> |
| 635 | <span>{t("common.loading")}</span> |
| 636 | </div> |
| 637 | ); |
| 638 | } |
| 639 | |
| 640 | if (state.status === "error") { |
| 641 | return ( |
| 642 | <div className="mermaid-diagram__error"> |
| 643 | <div className="mermaid-diagram__error-bar"> |
| 644 | <AlertCircle size={14} className="mermaid-diagram__error-icon" /> |
| 645 | <span>{t("error.diagram")}</span> |
| 646 | </div> |
| 647 | <pre className="code hljs mermaid-diagram__error-source" data-lang="mermaid"> |
| 648 | <code>{source}</code> |
| 649 | </pre> |
| 650 | <details className="mermaid-diagram__error-details"> |
| 651 | <summary>{t("error.details")}</summary> |
| 652 | <pre className="mermaid-diagram__error-detail-text">{state.message}</pre> |
| 653 | </details> |
| 654 | </div> |
| 655 | ); |
| 656 | } |
| 657 | |
| 658 | return <SvgPreview refEl={previewRef} svg={state.svg} />; |
| 659 | } |
| 660 | |
| 661 | function SvgPreview({ refEl, svg }: { refEl: RefObject<HTMLDivElement | null>; svg: string }) { |
| 662 | const openAnchor = useCallback((event: React.MouseEvent) => { |
| 663 | const target = event.target; |
| 664 | if (!(target instanceof Element)) return; |
| 665 | const anchor = target.closest("a"); |
| 666 | const href = anchor ? getMermaidAnchorHref(anchor) : null; |
| 667 | if (!href) return; |
| 668 | event.preventDefault(); |
| 669 | if (isOpenableMermaidHref(href)) openExternal(href); |
| 670 | }, []); |
| 671 | |
| 672 | const preventMiddleButtonNavigation = useCallback((event: React.MouseEvent) => { |
| 673 | if (event.button !== 1) return; |
| 674 | const target = event.target; |
| 675 | if (target instanceof Element && target.closest("a")) event.preventDefault(); |
| 676 | }, []); |
| 677 | |
| 678 | return ( |
| 679 | <div className="mermaid-diagram__preview-wrap"> |
| 680 | <div |
| 681 | className="mermaid-diagram__preview" |
| 682 | ref={refEl} |
| 683 | dangerouslySetInnerHTML={{ __html: svg }} |
| 684 | onClick={openAnchor} |
| 685 | onAuxClick={openAnchor} |
| 686 | onMouseDown={preventMiddleButtonNavigation} |
| 687 | /> |
| 688 | </div> |
| 689 | ); |
| 690 | } |
| 691 | |
| 692 | export default MermaidDiagram; |
| 693 |