|
| 1 | +"use client"; |
| 2 | + |
| 3 | +import { |
| 4 | + createContext, |
| 5 | + ReactNode, |
| 6 | + useCallback, |
| 7 | + useContext, |
| 8 | + useEffect, |
| 9 | + useMemo, |
| 10 | + useRef, |
| 11 | +} from "react"; |
| 12 | +import useSWR from "swr"; |
| 13 | +import { |
| 14 | + ReplOutput, |
| 15 | + RuntimeContext, |
| 16 | + RuntimeErrorHandler, |
| 17 | + RuntimeInfo, |
| 18 | + UpdatedFile, |
| 19 | +} from "../interface"; |
| 20 | + |
| 21 | +const DART_PAD_API_BASE = "https://stable.api.dartpad.dev/api/v3"; |
| 22 | +const DART_PAD_ARTIFACTS_BASE = "https://stable.api.dartpad.dev/artifacts"; |
| 23 | + |
| 24 | +interface DartVersionResponse { |
| 25 | + dartVersion?: string; |
| 26 | + flutterVersion?: string; |
| 27 | +} |
| 28 | + |
| 29 | +const versionFetcher = async (url: string): Promise<DartVersionResponse> => { |
| 30 | + const res = await fetch(url); |
| 31 | + if (!res.ok) { |
| 32 | + throw new Error(`Failed to fetch Dart version: ${res.statusText}`); |
| 33 | + } |
| 34 | + return res.json(); |
| 35 | +}; |
| 36 | + |
| 37 | +const DartContext = createContext<{ |
| 38 | + init: (onError?: RuntimeErrorHandler) => void; |
| 39 | + ready: boolean; |
| 40 | + dartVersion?: string; |
| 41 | +}>({ |
| 42 | + init: () => undefined, |
| 43 | + ready: true, |
| 44 | +}); |
| 45 | + |
| 46 | +export function DartProvider({ children }: { children: ReactNode }) { |
| 47 | + const onErrorRef = useRef<RuntimeErrorHandler | undefined>(undefined); |
| 48 | + const init = useCallback((onError?: RuntimeErrorHandler) => { |
| 49 | + onErrorRef.current = onError; |
| 50 | + }, []); |
| 51 | + |
| 52 | + const { data, error } = useSWR<DartVersionResponse>( |
| 53 | + `${DART_PAD_API_BASE}/version`, |
| 54 | + versionFetcher |
| 55 | + ); |
| 56 | + |
| 57 | + useEffect(() => { |
| 58 | + if (error) { |
| 59 | + console.error("Failed to fetch Dart version info:", error); |
| 60 | + onErrorRef.current?.(error); |
| 61 | + } |
| 62 | + }, [error]); |
| 63 | + |
| 64 | + return ( |
| 65 | + <DartContext.Provider |
| 66 | + value={{ |
| 67 | + init, |
| 68 | + ready: true, |
| 69 | + dartVersion: data?.dartVersion, |
| 70 | + }} |
| 71 | + > |
| 72 | + {children} |
| 73 | + </DartContext.Provider> |
| 74 | + ); |
| 75 | +} |
| 76 | + |
| 77 | +export function useDart(): RuntimeContext { |
| 78 | + const { init: dartInit, ready, dartVersion } = useContext(DartContext); |
| 79 | + const onErrorRef = useRef<RuntimeErrorHandler | undefined>(undefined); |
| 80 | + |
| 81 | + const init = useCallback( |
| 82 | + (onError?: RuntimeErrorHandler) => { |
| 83 | + onErrorRef.current = onError; |
| 84 | + dartInit(onError); |
| 85 | + }, |
| 86 | + [dartInit] |
| 87 | + ); |
| 88 | + |
| 89 | + const runFiles = useCallback( |
| 90 | + async ( |
| 91 | + filenames: string[], |
| 92 | + files: Readonly<Record<string, string>>, |
| 93 | + onOutput: (output: ReplOutput | UpdatedFile) => void |
| 94 | + ) => { |
| 95 | + if (typeof window === "undefined") { |
| 96 | + onOutput({ |
| 97 | + type: "error", |
| 98 | + message: "Dart runtime requires browser environment.", |
| 99 | + }); |
| 100 | + return; |
| 101 | + } |
| 102 | + |
| 103 | + const filename = filenames[0] ?? Object.keys(files)[0]; |
| 104 | + const source = files[filename] ?? Object.values(files)[0]; |
| 105 | + |
| 106 | + if (!source) { |
| 107 | + onOutput({ type: "error", message: "No source code provided to run." }); |
| 108 | + return; |
| 109 | + } |
| 110 | + |
| 111 | + try { |
| 112 | + const response = await fetch(`${DART_PAD_API_BASE}/compileNewDDC`, { |
| 113 | + method: "POST", |
| 114 | + headers: { |
| 115 | + "Content-Type": "application/json", |
| 116 | + }, |
| 117 | + body: JSON.stringify({ source }), |
| 118 | + }); |
| 119 | + |
| 120 | + if (!response.ok) { |
| 121 | + const errorText = await response.text(); |
| 122 | + onOutput({ |
| 123 | + type: "error", |
| 124 | + message: |
| 125 | + errorText || |
| 126 | + `Compilation failed with status ${response.status}`, |
| 127 | + }); |
| 128 | + return; |
| 129 | + } |
| 130 | + |
| 131 | + const data = await response.json(); |
| 132 | + if (!data.result) { |
| 133 | + onOutput({ |
| 134 | + type: "error", |
| 135 | + message: "Compilation returned empty result.", |
| 136 | + }); |
| 137 | + return; |
| 138 | + } |
| 139 | + |
| 140 | + const jsCode: string = data.result; |
| 141 | + |
| 142 | + // Execute compiled JS inside a temporary iframe |
| 143 | + await new Promise<void>((resolve) => { |
| 144 | + const iframe = document.createElement("iframe"); |
| 145 | + iframe.style.display = "none"; |
| 146 | + document.body.appendChild(iframe); |
| 147 | + |
| 148 | + let resolved = false; |
| 149 | + const cleanup = () => { |
| 150 | + if (resolved) return; |
| 151 | + resolved = true; |
| 152 | + window.removeEventListener("message", handleMessage); |
| 153 | + if (iframe.parentNode) { |
| 154 | + iframe.parentNode.removeChild(iframe); |
| 155 | + } |
| 156 | + resolve(); |
| 157 | + }; |
| 158 | + |
| 159 | + const handleMessage = (event: MessageEvent) => { |
| 160 | + if (event.source !== iframe.contentWindow) return; |
| 161 | + const msgData = event.data; |
| 162 | + if (!msgData || msgData.sender !== "dart_frame") return; |
| 163 | + |
| 164 | + if (msgData.type === "stdout") { |
| 165 | + onOutput({ type: "stdout", message: String(msgData.message) }); |
| 166 | + } else if (msgData.type === "stderr") { |
| 167 | + onOutput({ type: "stderr", message: String(msgData.message) }); |
| 168 | + } else if (msgData.type === "done") { |
| 169 | + cleanup(); |
| 170 | + } else if (msgData.type === "error") { |
| 171 | + onOutput({ type: "error", message: String(msgData.message) }); |
| 172 | + cleanup(); |
| 173 | + } |
| 174 | + }; |
| 175 | + |
| 176 | + window.addEventListener("message", handleMessage); |
| 177 | + |
| 178 | + const iframeDoc = iframe.contentDocument; |
| 179 | + if (!iframeDoc) { |
| 180 | + onOutput({ |
| 181 | + type: "error", |
| 182 | + message: "Failed to access iframe document.", |
| 183 | + }); |
| 184 | + cleanup(); |
| 185 | + return; |
| 186 | + } |
| 187 | + |
| 188 | + const htmlContent = `<!DOCTYPE html> |
| 189 | +<html> |
| 190 | +<head> |
| 191 | + <script src="https://dartpad.dev/require.js"></script> |
| 192 | +</head> |
| 193 | +<body> |
| 194 | + <script> |
| 195 | + window.dartPrint = function(message) { |
| 196 | + window.parent.postMessage({ |
| 197 | + sender: 'dart_frame', |
| 198 | + type: 'stdout', |
| 199 | + message: message == null ? '' : message.toString() |
| 200 | + }, '*'); |
| 201 | + }; |
| 202 | +
|
| 203 | + window.onerror = function(message, url, line, column, error) { |
| 204 | + var msg = message; |
| 205 | + if (error) { |
| 206 | + var errStr = String(error); |
| 207 | + var errStack = error.stack || ''; |
| 208 | + msg = errStr + (errStack ? '\\n' + errStack : ''); |
| 209 | + } |
| 210 | + window.parent.postMessage({ |
| 211 | + sender: 'dart_frame', |
| 212 | + type: 'stderr', |
| 213 | + message: msg |
| 214 | + }, '*'); |
| 215 | + }; |
| 216 | +
|
| 217 | + require.config({ |
| 218 | + baseUrl: "${DART_PAD_ARTIFACTS_BASE}/", |
| 219 | + waitSeconds: 60, |
| 220 | + onNodeCreated: function(node, config, id, url) { |
| 221 | + node.setAttribute('crossorigin', 'anonymous'); |
| 222 | + } |
| 223 | + }); |
| 224 | +
|
| 225 | + { |
| 226 | + let __ddcInitCode = function() { |
| 227 | + ${jsCode} |
| 228 | + }; |
| 229 | +
|
| 230 | + function contextLoaded() { |
| 231 | + try { |
| 232 | + __ddcInitCode(); |
| 233 | + dartDevEmbedder.runMain('package:dartpad_sample/bootstrap.dart', {}); |
| 234 | + } catch (err) { |
| 235 | + var msg = String(err) + (err && err.stack ? '\\n' + err.stack : ''); |
| 236 | + window.parent.postMessage({ |
| 237 | + sender: 'dart_frame', |
| 238 | + type: 'stderr', |
| 239 | + message: msg |
| 240 | + }, '*'); |
| 241 | + } finally { |
| 242 | + setTimeout(function() { |
| 243 | + window.parent.postMessage({ |
| 244 | + sender: 'dart_frame', |
| 245 | + type: 'done' |
| 246 | + }, '*'); |
| 247 | + }, 100); |
| 248 | + } |
| 249 | + } |
| 250 | +
|
| 251 | + function moduleLoaderLoaded() { |
| 252 | + require(["dart_sdk_new"], contextLoaded); |
| 253 | + } |
| 254 | +
|
| 255 | + require(["ddc_module_loader"], moduleLoaderLoaded); |
| 256 | + } |
| 257 | + </script> |
| 258 | +</body> |
| 259 | +</html>`; |
| 260 | + |
| 261 | + iframeDoc.open(); |
| 262 | + iframeDoc.write(htmlContent); |
| 263 | + iframeDoc.close(); |
| 264 | + |
| 265 | + setTimeout(() => { |
| 266 | + cleanup(); |
| 267 | + }, 15000); |
| 268 | + }); |
| 269 | + } catch (error) { |
| 270 | + onErrorRef.current?.(error); |
| 271 | + onOutput({ |
| 272 | + type: "fatalError", |
| 273 | + message: error instanceof Error ? error.message : String(error), |
| 274 | + }); |
| 275 | + } |
| 276 | + }, |
| 277 | + [] |
| 278 | + ); |
| 279 | + |
| 280 | + const runtimeInfo = useMemo<RuntimeInfo>( |
| 281 | + () => ({ |
| 282 | + prettyLangName: "Dart", |
| 283 | + version: dartVersion, |
| 284 | + }), |
| 285 | + [dartVersion] |
| 286 | + ); |
| 287 | + |
| 288 | + return { |
| 289 | + init, |
| 290 | + ready, |
| 291 | + runFiles, |
| 292 | + getCommandlineStr, |
| 293 | + runtimeInfo, |
| 294 | + }; |
| 295 | +} |
| 296 | + |
| 297 | +function getCommandlineStr(filenames: string[]) { |
| 298 | + return `dart run ${filenames[0] ?? "main.dart"}`; |
| 299 | +} |
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