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| 1 // Copyright (c) 2009, Google Inc. | |
| 2 // All rights reserved. | |
| 3 // | |
| 4 // Redistribution and use in source and binary forms, with or without | |
| 5 // modification, are permitted provided that the following conditions are | |
| 6 // met: | |
| 7 // | |
| 8 // * Redistributions of source code must retain the above copyright | |
| 9 // notice, this list of conditions and the following disclaimer. | |
| 10 // * Redistributions in binary form must reproduce the above | |
| 11 // copyright notice, this list of conditions and the following disclaimer | |
| 12 // in the documentation and/or other materials provided with the | |
| 13 // distribution. | |
| 14 // * Neither the name of Google Inc. nor the names of its | |
| 15 // contributors may be used to endorse or promote products derived from | |
| 16 // this software without specific prior written permission. | |
| 17 // | |
| 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | |
| 30 #include "config.h" | |
| 31 #include "bindings/core/dart/DartApplicationLoader.h" | |
| 32 | |
| 33 #include "core/FetchInitiatorTypeNames.h" | |
| 34 #include "bindings/core/dart/DartDOMWrapper.h" | |
| 35 #include "bindings/core/dart/DartInspectorTimeline.h" | |
| 36 #include "bindings/core/dart/DartScriptDebugServer.h" | |
| 37 #include "bindings/core/dart/DartUtilities.h" | |
| 38 #if defined(ENABLE_DART_NATIVE_EXTENSIONS) | |
| 39 #include "bindings/core/dart/shared_lib/DartNativeExtensions.h" | |
| 40 #endif | |
| 41 #include "bindings/core/v8/ScriptSourceCode.h" | |
| 42 #include "core/dom/Document.h" | |
| 43 #include "core/dom/Element.h" | |
| 44 #include "core/dom/ScriptLoader.h" | |
| 45 #include "core/dom/ScriptLoaderClient.h" | |
| 46 #include "core/fetch/CachedMetadata.h" | |
| 47 #include "core/fetch/FetchRequest.h" | |
| 48 #include "core/fetch/ResourceClient.h" | |
| 49 #include "core/fetch/ResourceFetcher.h" | |
| 50 #include "core/fetch/ScriptResource.h" | |
| 51 #include "core/frame/LocalDOMWindow.h" | |
| 52 #include "core/frame/LocalFrame.h" | |
| 53 #include "core/html/HTMLScriptElement.h" | |
| 54 #include "core/inspector/ScriptCallStack.h" | |
| 55 #include "core/svg/SVGScriptElement.h" | |
| 56 | |
| 57 #include <dart_api.h> | |
| 58 #include <dart_mirrors_api.h> | |
| 59 | |
| 60 namespace blink { | |
| 61 | |
| 62 // FIXME(vsm): Define this in a central place. | |
| 63 static const unsigned dartTypeID = 0xDAADDAAD; | |
| 64 | |
| 65 PassRefPtr<DartScriptInfo> DartScriptInfo::create(PassRefPtr<Element> scriptElem
ent) | |
| 66 { | |
| 67 RefPtr<DartScriptInfo> scriptInfo = adoptRef(new DartScriptInfo(scriptElemen
t)); | |
| 68 if (scriptInfo->loader()) | |
| 69 return scriptInfo; | |
| 70 return nullptr; | |
| 71 } | |
| 72 | |
| 73 String DartScriptInfo::sourceAttributeValue() const | |
| 74 { | |
| 75 return m_client->sourceAttributeValue(); | |
| 76 } | |
| 77 | |
| 78 String DartScriptInfo::typeAttributeValue() const | |
| 79 { | |
| 80 return m_client->typeAttributeValue(); | |
| 81 } | |
| 82 | |
| 83 String DartScriptInfo::scriptContent() | |
| 84 { | |
| 85 return m_loader->scriptContent(); | |
| 86 } | |
| 87 | |
| 88 void DartScriptInfo::dispatchErrorEvent() | |
| 89 { | |
| 90 m_loader->dispatchErrorEvent(); | |
| 91 } | |
| 92 | |
| 93 WTF::OrdinalNumber DartScriptInfo::startLineNumber() | |
| 94 { | |
| 95 return m_loader->startLineNumber(); | |
| 96 } | |
| 97 | |
| 98 ScriptLoader* DartScriptInfo::loader() | |
| 99 { | |
| 100 return m_loader; | |
| 101 } | |
| 102 | |
| 103 Document* DartScriptInfo::ownerDocument() | |
| 104 { | |
| 105 return m_element->ownerDocument(); | |
| 106 } | |
| 107 | |
| 108 String DartScriptInfo::url() | |
| 109 { | |
| 110 String scriptURL = sourceAttributeValue(); | |
| 111 KURL ownerURL = ownerDocument()->url(); | |
| 112 return scriptURL.isEmpty() ? ownerURL : KURL(ownerURL, scriptURL); | |
| 113 } | |
| 114 | |
| 115 DartScriptInfo::DartScriptInfo(PassRefPtr<Element> element) | |
| 116 { | |
| 117 m_element = element; | |
| 118 if (m_element->document().isHTMLDocument()) { | |
| 119 HTMLScriptElement* scriptElement = static_cast<HTMLScriptElement*>(m_ele
ment.get()); | |
| 120 m_loader = scriptElement->loader(); | |
| 121 m_client = static_cast<ScriptLoaderClient*>(scriptElement); | |
| 122 } else if (m_element->document().isSVGDocument()) { | |
| 123 SVGScriptElement* scriptElement = static_cast<SVGScriptElement*>(m_eleme
nt.get()); | |
| 124 m_loader = scriptElement->loader(); | |
| 125 m_client = static_cast<ScriptLoaderClient*>(scriptElement); | |
| 126 } else { | |
| 127 // Invalid script element. | |
| 128 m_loader = 0; | |
| 129 m_client = 0; | |
| 130 m_element = nullptr; | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 void DartApplicationLoader::Callback::reportError(const String& error, const Str
ing& url) | |
| 135 { | |
| 136 m_originDocument->logExceptionToConsole(error + ": " + url, url, 0, 0, nullp
tr); | |
| 137 if (m_scriptInfo) | |
| 138 m_scriptInfo->loader()->dispatchErrorEvent(); | |
| 139 } | |
| 140 | |
| 141 ResourcePtr<ScriptResource> DartApplicationLoader::Callback::requestScript(Fetch
Request& request) | |
| 142 { | |
| 143 return m_originDocument->fetcher()->fetchScript(request); | |
| 144 } | |
| 145 | |
| 146 Document* DartApplicationLoader::Callback::document() | |
| 147 { | |
| 148 return m_scriptInfo ? m_scriptInfo->ownerDocument() : m_originDocument; | |
| 149 } | |
| 150 | |
| 151 DartApplicationLoader::DartApplicationLoader( | |
| 152 Document* document, | |
| 153 bool domEnabled) | |
| 154 : m_isolate(0) | |
| 155 , m_originDocument(document) | |
| 156 , m_loadCallback(nullptr) | |
| 157 , m_domEnabled(domEnabled) | |
| 158 , m_cacheable(false) | |
| 159 , m_state(Uninitialized) | |
| 160 , m_snapshotMode(SnapshotOff) | |
| 161 { | |
| 162 ASSERT(m_originDocument); | |
| 163 | |
| 164 DEFINE_STATIC_LOCAL(String, setting, (getenv("DART_SNAPSHOT_MODE"))); | |
| 165 if (!setting.isNull()) { | |
| 166 if (setting == "all") | |
| 167 m_snapshotMode = SnapshotAll; | |
| 168 else if (setting == "off") | |
| 169 m_snapshotMode = SnapshotOff; | |
| 170 else if (setting == "single") | |
| 171 m_snapshotMode = SnapshotSingle; | |
| 172 else | |
| 173 DartUtilities::reportProblem(m_originDocument, String("Invalid DART_
SNAPSHOT_MODE: ") + setting); | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 void DartApplicationLoader::addRequest(PassRefPtr<DartScriptInfo> scriptInfo) | |
| 178 { | |
| 179 // FIXME(vsm): Temporary support to load extra Dart libraries via HTML impor
ts before we encounter the main | |
| 180 // script. In the future, this should map to deferred loading. | |
| 181 RELEASE_ASSERT(m_state == Uninitialized); | |
| 182 m_htmlImportedScripts.append(scriptInfo); | |
| 183 } | |
| 184 | |
| 185 void DartApplicationLoader::initialize(Dart_Isolate isolate, const String& scrip
tUrl, PassRefPtr<Callback> loadCallback) | |
| 186 { | |
| 187 RELEASE_ASSERT(m_state == Uninitialized && !m_isolate); | |
| 188 m_isolate = isolate; | |
| 189 m_loadCallback = loadCallback; | |
| 190 | |
| 191 Document* document = m_loadCallback->document(); | |
| 192 m_scriptUrl = KURL(document->baseURL(), scriptUrl); | |
| 193 m_scriptUrlString = m_scriptUrl.string(); | |
| 194 | |
| 195 RELEASE_ASSERT(m_isolate == isolate); | |
| 196 Dart_EnterIsolate(isolate); | |
| 197 | |
| 198 // Associate application loader with current isolate, so we can retrieve it
in libraryTagHandlerCallback. | |
| 199 DartDOMData::current()->setApplicationLoader(this); | |
| 200 Dart_Handle ALLOW_UNUSED result = Dart_SetLibraryTagHandler(&libraryTagHandl
erCallback); | |
| 201 ASSERT(!Dart_IsError(result)); | |
| 202 | |
| 203 // FIXME: Stay in isolate for processing below. | |
| 204 Dart_ExitIsolate(); | |
| 205 m_state = Initialized; | |
| 206 } | |
| 207 | |
| 208 void DartApplicationLoader::processRequests(Dart_Isolate isolate, const ScriptSo
urceCode& sourceCode, PassRefPtr<Callback> loadCallback) | |
| 209 { | |
| 210 DART_START_TIMER(); | |
| 211 const String& scriptUrl = sourceCode.url(); | |
| 212 initialize(isolate, scriptUrl, loadCallback); | |
| 213 DART_RECORD_TIMER(" DartApplicationLoader::initialize took"); | |
| 214 | |
| 215 m_state = Fetching; | |
| 216 | |
| 217 // Check for cached snapshot. | |
| 218 ScriptResource* scriptResource = sourceCode.resource(); | |
| 219 if (scriptResource && m_snapshotMode != SnapshotOff) { | |
| 220 // This is cacheable if there is a resource we can cache the snapshot on
. | |
| 221 m_cacheable = true; | |
| 222 CachedMetadata* cachedMetadata = scriptResource->cachedMetadata(dartType
ID); | |
| 223 if (cachedMetadata) { | |
| 224 loadScriptFromSnapshot(sourceCode.url(), reinterpret_cast<const uint
8_t*>(cachedMetadata->data()), cachedMetadata->size()); | |
| 225 return; | |
| 226 } | |
| 227 } | |
| 228 | |
| 229 // Set up root library for main DOM isolate. | |
| 230 { | |
| 231 DartIsolateScope isolateScope(m_isolate); | |
| 232 DartApiScope apiScope; | |
| 233 | |
| 234 ASSERT(Dart_IsNull(Dart_RootLibrary())); | |
| 235 | |
| 236 Document* document = m_loadCallback->document(); | |
| 237 const String& source = sourceCode.source(); | |
| 238 int lineNumber = sourceCode.startLine(); | |
| 239 | |
| 240 // Use zero-based counting instead of one-based. | |
| 241 lineNumber = (lineNumber <= 0) ? 0 : lineNumber - 1; | |
| 242 | |
| 243 String canonical = KURL(document->url(), scriptUrl).string(); | |
| 244 m_pendingLibraries.add(canonical); | |
| 245 process(canonical, source, lineNumber); | |
| 246 RELEASE_ASSERT(m_state >= Loading); | |
| 247 } | |
| 248 | |
| 249 // FIXME(vsm): This will go away. | |
| 250 // Load HTML imported dart scripts. | |
| 251 while (!m_htmlImportedScripts.isEmpty()) { | |
| 252 RefPtr<DartScriptInfo> script = m_htmlImportedScripts.takeFirst(); | |
| 253 const String& src = script->sourceAttributeValue(); | |
| 254 const String& url = script->url(); | |
| 255 if (src.isEmpty()) { | |
| 256 // Inline script. | |
| 257 ASSERT(!m_pendingLibraries.contains(url)); | |
| 258 m_pendingLibraries.add(url); | |
| 259 intptr_t lineOffset = script->startLineNumber().zeroBasedInt(); | |
| 260 // Blink gives generated script tags an invalid start line. | |
| 261 if (lineOffset < 0) | |
| 262 lineOffset = 0; | |
| 263 process(script->url(), script->scriptContent(), lineOffset); | |
| 264 } else { | |
| 265 // Canonicalize the src attribute url. | |
| 266 String canonical = KURL(script->ownerDocument()->url(), src).string(
); | |
| 267 | |
| 268 // Check if this was loaded by an earlier script. | |
| 269 { | |
| 270 DartIsolateScope isolateScope(m_isolate); | |
| 271 DartApiScope apiScope; | |
| 272 Dart_Handle library = Dart_LookupLibrary(DartUtilities::safeStri
ngToDartString(canonical)); | |
| 273 if (!Dart_IsError(library)) | |
| 274 continue; | |
| 275 } | |
| 276 | |
| 277 // Request if we don't have the script or haven't already requested
it. | |
| 278 if (!m_pendingLibraries.contains(canonical)) { | |
| 279 m_pendingLibraries.add(canonical); | |
| 280 fetchScriptResource(canonical); | |
| 281 } | |
| 282 } | |
| 283 } | |
| 284 | |
| 285 // FIXME(vsm): Once m_htmlImportedScripts goes away, we should be able to de
lete this. | |
| 286 // Processing HTML imports may be made the app ready without running. | |
| 287 RELEASE_ASSERT(m_state == Error || m_state >= Loading); | |
| 288 if (ready() && m_state == Loading) { | |
| 289 m_state = Ready; | |
| 290 // All dependences are in. | |
| 291 m_loadCallback->ready(); | |
| 292 } | |
| 293 | |
| 294 DART_RECORD_TIMER(" DartApplicationLoader::processRequests took"); | |
| 295 } | |
| 296 | |
| 297 void DartApplicationLoader::processSingleRequest(Dart_Isolate isolate, const Str
ing& scriptUrl, PassRefPtr<Callback> loadCallback) | |
| 298 { | |
| 299 initialize(isolate, scriptUrl, loadCallback); | |
| 300 m_pendingLibraries.add(scriptUrl); | |
| 301 m_state = Fetching; | |
| 302 fetchScriptResource(scriptUrl); | |
| 303 } | |
| 304 | |
| 305 void DartApplicationLoader::load(PassRefPtr<DartErrorEventDispatcher> errorEvent
Dispatcher) | |
| 306 { | |
| 307 RELEASE_ASSERT(m_state == Ready || m_state == DeferredReady); | |
| 308 | |
| 309 m_errorEventDispatcher = errorEventDispatcher; | |
| 310 | |
| 311 DartIsolateScope isolateScope(m_isolate); | |
| 312 DartApiScope dartApiScope; | |
| 313 bool completeFutures = false; | |
| 314 | |
| 315 // Finalize classes and complete futures if there are any deferred loads. | |
| 316 if (m_state == DeferredReady) { | |
| 317 // We have already invoked the entry point on the main script URL at | |
| 318 // this point we will start running dart code again. | |
| 319 m_state = Running; | |
| 320 completeFutures = true; | |
| 321 } else { | |
| 322 RELEASE_ASSERT(m_state == Ready); | |
| 323 } | |
| 324 | |
| 325 { | |
| 326 V8Scope v8scope(DartDOMData::current()); | |
| 327 Dart_Handle result = Dart_FinalizeLoading(completeFutures); | |
| 328 if (Dart_IsError(result)) { | |
| 329 reportDartError(result); | |
| 330 return; | |
| 331 } | |
| 332 } | |
| 333 // Invoke the entry point on the main script URL if it has not yet been | |
| 334 // invoked. | |
| 335 if (m_state == Ready) { | |
| 336 // Call the entry point on the main script URL. | |
| 337 callEntryPoint(); | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 void DartApplicationLoader::loadScriptFromSnapshot(const String& url, const uint
8_t* snapshot, intptr_t snapshotSize) | |
| 342 { | |
| 343 DART_START_TIMER(); | |
| 344 RELEASE_ASSERT(m_state == Fetching); | |
| 345 | |
| 346 Timeline timeline(m_originDocument->frame(), String("loadSnapshot@") + m_scr
iptUrlString); | |
| 347 m_scriptUrlString = url; | |
| 348 DartIsolateScope isolateScope(m_isolate); | |
| 349 DartApiScope apiScope; | |
| 350 Dart_Handle result = Dart_LoadScriptFromSnapshot(snapshot, snapshotSize); | |
| 351 if (Dart_IsError(result)) { | |
| 352 reportDartError(result); | |
| 353 return; | |
| 354 } | |
| 355 | |
| 356 m_state = Ready; | |
| 357 m_loadCallback->ready(); | |
| 358 DART_RECORD_TIMER(" DartApplicationLoader::loadScriptFromSnapshot took"); | |
| 359 } | |
| 360 | |
| 361 void DartApplicationLoader::callEntryPoint() | |
| 362 { | |
| 363 RELEASE_ASSERT(m_state == Ready); | |
| 364 | |
| 365 Timeline timeline(m_originDocument->frame(), String("callEntryPoint@") + m_s
criptUrlString); | |
| 366 | |
| 367 if (m_cacheable) { | |
| 368 // Snapshot single-script applications. | |
| 369 ResourceFetcher* loader = m_originDocument->fetcher(); | |
| 370 FetchRequest request(m_originDocument->completeURL(m_scriptUrlString), F
etchInitiatorTypeNames::document); | |
| 371 ResourcePtr<ScriptResource> scriptResource = loader->fetchScript(request
); | |
| 372 | |
| 373 // Check if already snapshotted. | |
| 374 if (scriptResource && !scriptResource->cachedMetadata(dartTypeID)) { | |
| 375 uint8_t* buffer; | |
| 376 intptr_t size; | |
| 377 Dart_Handle result = Dart_CreateScriptSnapshot(&buffer, &size); | |
| 378 if (Dart_IsError(result)) { | |
| 379 reportDartError(result); | |
| 380 // FIXME: exiting early might be not the best option if error is
due to snapshot | |
| 381 // creation proper (and not due to compilation), even though it'
s unlikely. | |
| 382 // Consider other options like Dart_CompileAll. | |
| 383 return; | |
| 384 } | |
| 385 | |
| 386 Vector<uint8_t>* snapshot = DartDOMData::current()->applicationSnaps
hot(); | |
| 387 ASSERT(snapshot->isEmpty()); | |
| 388 snapshot->append(buffer, size); | |
| 389 | |
| 390 // Write the snapshot. | |
| 391 scriptResource->setCachedMetadata(dartTypeID, reinterpret_cast<const
char*>(buffer), size); | |
| 392 } | |
| 393 } | |
| 394 | |
| 395 if (m_domEnabled) { | |
| 396 Timeline timeline(m_originDocument->frame(), String("notifyDebugServer@"
) + m_scriptUrlString); | |
| 397 DartScriptDebugServer::shared().isolateLoaded(); | |
| 398 } | |
| 399 | |
| 400 m_state = Running; | |
| 401 if (m_domEnabled) { | |
| 402 V8Scope v8scope(DartDOMData::current()); | |
| 403 Dart_Handle mainLibrary = topLevelLibrary(); | |
| 404 | |
| 405 // Trampoline to invoke main. | |
| 406 // FIXME: Use the page library instead. To do this, we need to import ea
ch script tag's library into the page | |
| 407 // with a unique prefix to ensure a secondary script doesn't define a ma
in. | |
| 408 String trampolineUrl = m_scriptUrlString + "$trampoline"; | |
| 409 Dart_Handle trampoline = Dart_LoadLibrary(DartUtilities::safeStringToDar
tString(trampolineUrl), Dart_NewStringFromCString(""), 0, 0); | |
| 410 Dart_LibraryImportLibrary(trampoline, mainLibrary, Dart_Null()); | |
| 411 | |
| 412 Dart_Handle result = Dart_FinalizeLoading(false); | |
| 413 if (Dart_IsError(result)) { | |
| 414 DartUtilities::reportProblem(m_originDocument, result, m_scriptUrlSt
ring); | |
| 415 } | |
| 416 | |
| 417 // FIXME: Settle on proper behavior here. We have not determined exactly
when | |
| 418 // or how often we'll call the entry point. | |
| 419 Dart_Handle entryPoint = Dart_NewStringFromCString("main"); | |
| 420 Dart_Handle main = Dart_LookupFunction(trampoline, entryPoint); | |
| 421 if (!Dart_IsNull(main)) { | |
| 422 // FIXME: Avoid relooking up main. | |
| 423 Dart_Handle result = Dart_Invoke(trampoline, entryPoint, 0, 0); | |
| 424 if (Dart_IsError(result)) { | |
| 425 DartUtilities::reportProblem(m_originDocument, result, m_scriptU
rlString); | |
| 426 } | |
| 427 } | |
| 428 } | |
| 429 } | |
| 430 | |
| 431 void DartApplicationLoader::validateUrlLoaded(const String& url) | |
| 432 { | |
| 433 RELEASE_ASSERT(m_state == Running); | |
| 434 | |
| 435 DartIsolateScope isolateScope(m_isolate); | |
| 436 DartApiScope apiScope; | |
| 437 | |
| 438 Dart_Handle library = Dart_LookupLibrary(DartUtilities::safeStringToDartStri
ng(url)); | |
| 439 if (!Dart_IsNull(library)) { | |
| 440 DartUtilities::reportProblem(m_originDocument, "URL must be imported by
main Dart script: " + url); | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 Dart_Handle DartApplicationLoader::topLevelLibrary() | |
| 445 { | |
| 446 Dart_Handle library = Dart_LookupLibrary(DartUtilities::safeStringToDartStri
ng(m_scriptUrlString)); | |
| 447 ASSERT(!Dart_IsError(library)); | |
| 448 return library; | |
| 449 } | |
| 450 | |
| 451 void DartApplicationLoader::findDependences(const String& url, const String& sou
rce, intptr_t lineNumber) | |
| 452 { | |
| 453 ASSERT(m_pendingLibraries.contains(url) || m_pendingSource.contains(url)); | |
| 454 | |
| 455 DartIsolateScope isolateScope(m_isolate); | |
| 456 DartApiScope dartApiScope; | |
| 457 | |
| 458 if (m_pendingLibraries.contains(url)) { | |
| 459 processLibrary(url, source, lineNumber); | |
| 460 } else { | |
| 461 ASSERT(m_pendingSource.contains(url)); | |
| 462 processSource(url, source, lineNumber); | |
| 463 } | |
| 464 } | |
| 465 | |
| 466 void DartApplicationLoader::processLibrary(const String& url, const String& sour
ce, intptr_t lineNumber) | |
| 467 { | |
| 468 ASSERT(m_pendingLibraries.contains(url)); | |
| 469 | |
| 470 Dart_Handle result; | |
| 471 if (m_state == Fetching) { | |
| 472 // A spawned isolate. | |
| 473 m_state = Loading; | |
| 474 result = Dart_LoadScript(DartUtilities::safeStringToDartString(url), Dar
tUtilities::convertSourceString(source), lineNumber, 0); | |
| 475 } else { | |
| 476 result = Dart_LoadLibrary(DartUtilities::safeStringToDartString(url), Da
rtUtilities::convertSourceString(source), lineNumber, 0); | |
| 477 } | |
| 478 if (Dart_IsError(result)) | |
| 479 reportError(result, url); | |
| 480 | |
| 481 m_pendingLibraries.remove(url); | |
| 482 } | |
| 483 | |
| 484 void DartApplicationLoader::processSource(const String& url, const String& sourc
e, intptr_t lineNumber) | |
| 485 { | |
| 486 ASSERT(m_pendingSource.contains(url)); | |
| 487 HandleSet* importers = m_pendingSource.take(url); | |
| 488 for (HandleSet::iterator i = importers->begin(); i != importers->end(); ++i)
{ | |
| 489 Dart_Handle persistent = *i; | |
| 490 Dart_Handle library = Dart_HandleFromPersistent(persistent); | |
| 491 Dart_DeletePersistentHandle(persistent); | |
| 492 | |
| 493 Dart_Handle result = Dart_LoadSource(library, DartUtilities::safeStringT
oDartString(url), DartUtilities::convertSourceString(source), lineNumber, 0); | |
| 494 if (Dart_IsError(result)) | |
| 495 reportError(result, url); | |
| 496 } | |
| 497 delete importers; | |
| 498 } | |
| 499 | |
| 500 void DartApplicationLoader::process(const String& url, const String& source, int
ptr_t lineNumber) | |
| 501 { | |
| 502 if (m_state == Error) | |
| 503 return; | |
| 504 | |
| 505 if (url != m_scriptUrlString && m_snapshotMode != SnapshotAll) | |
| 506 m_cacheable = false; | |
| 507 | |
| 508 RELEASE_ASSERT(m_state == Fetching || m_state == Loading || m_state == Defer
redLoading); | |
| 509 findDependences(url, source, lineNumber); | |
| 510 RELEASE_ASSERT(m_state == Error || m_state == Loading || m_state == Deferred
Loading); | |
| 511 | |
| 512 if (ready()) { | |
| 513 m_state = (m_state == Loading) ? Ready : DeferredReady; | |
| 514 // All dependences are in. | |
| 515 m_loadCallback->ready(); | |
| 516 } | |
| 517 } | |
| 518 | |
| 519 Dart_Handle DartApplicationLoader::libraryTagHandlerCallback(Dart_LibraryTag tag
, Dart_Handle library, Dart_Handle urlHandle) | |
| 520 { | |
| 521 ASSERT(Dart_CurrentIsolate()); | |
| 522 ASSERT(Dart_IsLibrary(library)); | |
| 523 | |
| 524 const String url = DartUtilities::toString(urlHandle); | |
| 525 | |
| 526 if (tag == Dart_kCanonicalizeUrl) { | |
| 527 // If a dart application calls spawnUri, the DartVM will call this | |
| 528 // libraryTagHandler to canonicalize the url. | |
| 529 // DartDOMData::current()->scriptLoader() may be 0 at this point. | |
| 530 return DartUtilities::canonicalizeUrl(library, urlHandle, url); | |
| 531 } | |
| 532 | |
| 533 if (url.startsWith("dart:")) { | |
| 534 // All supported system URLs are already built-in and shouldn't get to t
his point. | |
| 535 return Dart_NewApiError("The requested built-in library is not available
on Dartium."); | |
| 536 } | |
| 537 | |
| 538 RefPtr<DartApplicationLoader> loader = DartDOMData::current()->applicationLo
ader(); | |
| 539 ASSERT(loader); | |
| 540 // We can only handle requests in one of the following states. | |
| 541 if (loader->m_state == Error) | |
| 542 return Dart_NewApiError("The isolate is in an invalid state."); | |
| 543 RELEASE_ASSERT(loader->m_state == Fetching || loader->m_state == Loading ||
loader->m_state == Running || loader->m_state == DeferredLoading); | |
| 544 | |
| 545 | |
| 546 // Fetch non-system URLs. | |
| 547 if (tag == Dart_kImportTag) { | |
| 548 if (loader->m_pendingLibraries.contains(url)) | |
| 549 return Dart_True(); | |
| 550 #if defined(ENABLE_DART_NATIVE_EXTENSIONS) | |
| 551 if (url.startsWith("dart-ext:")) { | |
| 552 return DartNativeExtensions::loadExtension(url, library); | |
| 553 } | |
| 554 #endif | |
| 555 loader->m_pendingLibraries.add(url); | |
| 556 } else if (tag == Dart_kSourceTag) { | |
| 557 Dart_PersistentHandle importer = Dart_NewPersistentHandle(library); | |
| 558 HandleSet* importers; | |
| 559 if (loader->m_pendingSource.contains(url)) { | |
| 560 // We have already requested this url. It is a part of more than one
library. | |
| 561 importers = loader->m_pendingSource.get(url); | |
| 562 importers->append(importer); | |
| 563 return Dart_True(); | |
| 564 } | |
| 565 importers = new HandleSet(); | |
| 566 loader->m_pendingSource.add(url, importers); | |
| 567 importers->append(importer); | |
| 568 } else { | |
| 569 ASSERT_NOT_REACHED(); | |
| 570 } | |
| 571 | |
| 572 // If the isolate is running, this is part of a deferred load request. | |
| 573 if (loader->m_state == Running) | |
| 574 loader->m_state = DeferredLoading; | |
| 575 loader->fetchScriptResource(url); | |
| 576 return Dart_True(); | |
| 577 } | |
| 578 | |
| 579 class ScriptLoadedCallback : public ResourceClient { | |
| 580 public: | |
| 581 ScriptLoadedCallback(String url, PassRefPtr<DartApplicationLoader> loader, R
esourcePtr<ScriptResource> scriptResource) | |
| 582 : m_url(url) | |
| 583 , m_loader(loader) | |
| 584 , m_scriptResource(scriptResource) | |
| 585 { | |
| 586 } | |
| 587 | |
| 588 virtual void notifyFinished(Resource* cachedResource) | |
| 589 { | |
| 590 ASSERT(cachedResource->type() == Resource::Script); | |
| 591 ASSERT(cachedResource == m_scriptResource.get()); | |
| 592 ASSERT(WTF::isMainThread()); | |
| 593 | |
| 594 if (cachedResource->errorOccurred()) { | |
| 595 m_loader->reportError(String("An error occurred loading file"), m_ur
l); | |
| 596 } else if (cachedResource->wasCanceled()) { | |
| 597 // FIXME: shall we let VM know, so it can inform application some of
its | |
| 598 // resources cannot be loaded? | |
| 599 m_loader->reportError(String("File request cancelled"), m_url); | |
| 600 } else { | |
| 601 ScriptSourceCode sourceCode(m_scriptResource.get()); | |
| 602 | |
| 603 // Use the original url associated with the Script so that | |
| 604 // redirects do not break the DartScriptLoader. | |
| 605 // FIXME: is this the correct behavior? This functionality is | |
| 606 // very convenient when you want the source file to act as if | |
| 607 // it was from the original location but that isn't always | |
| 608 // what the user expects. | |
| 609 m_loader->process(m_url, sourceCode.source(), 0); | |
| 610 } | |
| 611 | |
| 612 m_scriptResource->removeClient(this); | |
| 613 delete this; | |
| 614 } | |
| 615 | |
| 616 private: | |
| 617 String m_url; | |
| 618 RefPtr<DartApplicationLoader> m_loader; | |
| 619 ResourcePtr<ScriptResource> m_scriptResource; | |
| 620 }; | |
| 621 | |
| 622 static String resolveUrl(String mainLibraryURL, const String& url) | |
| 623 { | |
| 624 if (!url.startsWith("package:") || url.startsWith("package://")) | |
| 625 return url; | |
| 626 | |
| 627 String packageRoot; | |
| 628 String packageUrl; | |
| 629 if (const char* packageRootOverride = getenv("DART_PACKAGE_ROOT")) { | |
| 630 // Resolve with respect to the override. Append a | |
| 631 // slash to ensure that resolution is against this | |
| 632 // path and not its parent. | |
| 633 packageRoot = String(packageRootOverride) + "/"; | |
| 634 // Strip the 'package:' prefix. | |
| 635 packageUrl = url.substring(8); | |
| 636 } else { | |
| 637 // Resolve with respect to the entry point's URL. Note, the | |
| 638 // trailing file name in the entry point URL (e.g., | |
| 639 // 'rootpath/mainapp.dart') is stripped by the KURL | |
| 640 // constructor below. | |
| 641 packageRoot = mainLibraryURL; | |
| 642 packageUrl = String("packages/") + url.substring(8); | |
| 643 } | |
| 644 return KURL(KURL(KURL(), packageRoot), packageUrl).string(); | |
| 645 } | |
| 646 | |
| 647 void DartApplicationLoader::fetchScriptResource(const String& url) | |
| 648 { | |
| 649 // Request loading of script dependencies. | |
| 650 FetchRequest request(m_loadCallback->completeURL(resolveUrl(m_scriptUrl, url
)), | |
| 651 FetchInitiatorTypeNames::document, "utf8"); | |
| 652 // FIXME: what about charset for this script, maybe use charset of initial s
cript tag? | |
| 653 ResourcePtr<ScriptResource> scriptResource = m_loadCallback->requestScript(r
equest); | |
| 654 if (scriptResource) { | |
| 655 scriptResource->addClient(new ScriptLoadedCallback(m_loadCallback->compl
eteURL(url), this, scriptResource)); | |
| 656 } else { | |
| 657 m_loadCallback->reportError(String("File request error"), url); | |
| 658 } | |
| 659 } | |
| 660 | |
| 661 // FIXME(vsm): Merge these functions below. We need to be careful about where th
e error is dispatched. | |
| 662 void DartApplicationLoader::scriptLoadError(String failedUrl) | |
| 663 { | |
| 664 if (m_state < Running) | |
| 665 m_state = Error; | |
| 666 // FIXME: try to dig out line number, -1 for now. | |
| 667 if (failedUrl.startsWith(String("dart:"))) { | |
| 668 m_originDocument->logExceptionToConsole(String("The built-in library '")
+ failedUrl + String("' is not available on Dartium."), m_scriptUrlString, -1,
0, nullptr); | |
| 669 } else { | |
| 670 m_originDocument->logExceptionToConsole(String("Failed to load a file ")
+ failedUrl, m_scriptUrlString, -1, 0, nullptr); | |
| 671 } | |
| 672 RELEASE_ASSERT(m_errorEventDispatcher); | |
| 673 m_errorEventDispatcher->dispatchErrorEvent(); | |
| 674 } | |
| 675 | |
| 676 void DartApplicationLoader::reportDartError(Dart_Handle error) | |
| 677 { | |
| 678 if (m_state < Running) | |
| 679 m_state = Error; | |
| 680 DartUtilities::reportProblem(m_originDocument, error, m_scriptUrlString); | |
| 681 } | |
| 682 | |
| 683 void DartApplicationLoader::reportError(Dart_Handle error, const String& url) | |
| 684 { | |
| 685 reportError(Dart_GetError(error), url); | |
| 686 } | |
| 687 | |
| 688 void DartApplicationLoader::reportError(const String& error, const String& url) | |
| 689 { | |
| 690 if (m_state < Running) | |
| 691 m_state = Error; | |
| 692 m_loadCallback->reportError(error, url); | |
| 693 } | |
| 694 | |
| 695 | |
| 696 } | |
| OLD | NEW |
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