Source/WebCore/testing/Internals.cpp

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  * Copyright (C) 2013-2015 Apple Inc. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1.  Redistributions of source code must retain the above copyright
  10  *     notice, this list of conditions and the following disclaimer.
  11  * 2.  Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  22  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "Internals.h"
  29
  30 #include "AXObjectCache.h"
  31 #include "ActiveDOMCallbackMicrotask.h"
  32 #include "AnimationController.h"
  33 #include "ApplicationCacheStorage.h"
  34 #include "Autofill.h"
  35 #include "BackForwardController.h"
  36 #include "BitmapImage.h"
  37 #include "CachedImage.h"
  38 #include "CachedResourceLoader.h"
  39 #include "Chrome.h"
  40 #include "ChromeClient.h"
  41 #include "ClientRect.h"
  42 #include "ClientRectList.h"
  43 #include "ComposedTreeIterator.h"
  44 #include "Cursor.h"
  45 #include "DOMPath.h"
  46 #include "DOMStringList.h"
  47 #include "DOMWindow.h"
  48 #include "DisplayList.h"
  49 #include "Document.h"
  50 #include "DocumentMarker.h"
  51 #include "DocumentMarkerController.h"
  52 #include "Editor.h"
  53 #include "Element.h"
  54 #include "EventHandler.h"
  55 #include "ExceptionCode.h"
  56 #include "ExtensionStyleSheets.h"
  57 #include "File.h"
  58 #include "FontCache.h"
  59 #include "FormController.h"
  60 #include "FrameLoader.h"
  61 #include "FrameView.h"
  62 #include "GCObservation.h"
  63 #include "HTMLCanvasElement.h"
  64 #include "HTMLIFrameElement.h"
  65 #include "HTMLImageElement.h"
  66 #include "HTMLInputElement.h"
  67 #include "HTMLLinkElement.h"
  68 #include "HTMLNames.h"
  69 #include "HTMLPlugInElement.h"
  70 #include "HTMLPreloadScanner.h"
  71 #include "HTMLSelectElement.h"
  72 #include "HTMLTextAreaElement.h"
  73 #include "HTMLVideoElement.h"
  74 #include "HistoryController.h"
  75 #include "HistoryItem.h"
  76 #include "HitTestResult.h"
  77 #include "IconController.h"
  78 #include "InspectorClient.h"
  79 #include "InspectorController.h"
  80 #include "InspectorFrontendClientLocal.h"
  81 #include "InspectorOverlay.h"
  82 #include "InstrumentingAgents.h"
  83 #include "IntRect.h"
  84 #include "InternalSettings.h"
  85 #include "Language.h"
  86 #include "MainFrame.h"
  87 #include "MallocStatistics.h"
  88 #include "MediaPlayer.h"
  89 #include "MediaProducer.h"
  90 #include "MemoryCache.h"
  91 #include "MemoryInfo.h"
  92 #include "MemoryPressureHandler.h"
  93 #include "MockPageOverlay.h"
  94 #include "MockPageOverlayClient.h"
  95 #include "Page.h"
  96 #include "PageCache.h"
  97 #include "PageOverlay.h"
  98 #include "PathUtilities.h"
  99 #include "PlatformMediaSessionManager.h"
 100 #include "PrintContext.h"
 101 #include "PseudoElement.h"
 102 #include "Range.h"
 103 #include "RenderEmbeddedObject.h"
 104 #include "RenderLayerBacking.h"
 105 #include "RenderLayerCompositor.h"
 106 #include "RenderMenuList.h"
 107 #include "RenderTreeAsText.h"
 108 #include "RenderView.h"
 109 #include "RenderedDocumentMarker.h"
 110 #include "ResourceLoadObserver.h"
 111 #include "RuntimeEnabledFeatures.h"
 112 #include "SVGPathStringBuilder.h"
 113 #include "SchemeRegistry.h"
 114 #include "ScriptedAnimationController.h"
 115 #include "ScrollingCoordinator.h"
 116 #include "SerializedScriptValue.h"
 117 #include "Settings.h"
 118 #include "ShadowRoot.h"
 119 #include "SourceBuffer.h"
 120 #include "SpellChecker.h"
 121 #include "StaticNodeList.h"
 122 #include "StyleScope.h"
 123 #include "StyleSheetContents.h"
 124 #include "TextIterator.h"
 125 #include "TreeScope.h"
 126 #include "TypeConversions.h"
 127 #include "UserGestureIndicator.h"
 128 #include "UserMediaController.h"
 129 #include "ViewportArguments.h"
 130 #include "WebCoreJSClientData.h"
 131 #include "WorkerThread.h"
 132 #include "XMLHttpRequest.h"
 133 #include <bytecode/CodeBlock.h>
 134 #include <inspector/InspectorAgentBase.h>
 135 #include <inspector/InspectorFrontendChannel.h>
 136 #include <inspector/InspectorValues.h>
 137 #include <runtime/JSCInlines.h>
 138 #include <runtime/JSCJSValue.h>
 139 #include <wtf/text/CString.h>
 140 #include <wtf/text/StringBuffer.h>
 141
 142 #if ENABLE(INPUT_TYPE_COLOR)
 143 #include "ColorChooser.h"
 144 #endif
 145
 146 #if ENABLE(BATTERY_STATUS)
 147 #include "BatteryController.h"
 148 #endif
 149
 150 #if ENABLE(PROXIMITY_EVENTS)
 151 #include "DeviceProximityController.h"
 152 #endif
 153
 154 #if ENABLE(MOUSE_CURSOR_SCALE)
 155 #include <wtf/dtoa.h>
 156 #endif
 157
 158 #if ENABLE(LEGACY_ENCRYPTED_MEDIA)
 159 #include "CDM.h"
 160 #include "MockCDM.h"
 161 #endif
 162
 163 #if ENABLE(VIDEO_TRACK)
 164 #include "CaptionUserPreferences.h"
 165 #include "PageGroup.h"
 166 #endif
 167
 168 #if ENABLE(VIDEO)
 169 #include "HTMLMediaElement.h"
 170 #include "TimeRanges.h"
 171 #endif
 172
 173 #if ENABLE(SPEECH_SYNTHESIS)
 174 #include "DOMWindowSpeechSynthesis.h"
 175 #include "PlatformSpeechSynthesizerMock.h"
 176 #include "SpeechSynthesis.h"
 177 #endif
 178
 179 #if ENABLE(VIBRATION)
 180 #include "Vibration.h"
 181 #endif
 182
 183 #if ENABLE(MEDIA_STREAM)
 184 #include "MockRealtimeMediaSourceCenter.h"
 185 #endif
 186
 187 #if ENABLE(WEB_RTC)
 188 #include "MockMediaEndpoint.h"
 189 #include "RTCPeerConnection.h"
 190 #include "RTCPeerConnectionHandlerMock.h"
 191 #endif
 192
 193 #if ENABLE(MEDIA_SOURCE)
 194 #include "MockMediaPlayerMediaSource.h"
 195 #endif
 196
 197 #if PLATFORM(MAC)
 198 #include "DictionaryLookup.h"
 199 #endif
 200
 201 #if ENABLE(CONTENT_FILTERING)
 202 #include "MockContentFilterSettings.h"
 203 #endif
 204
 205 #if ENABLE(WEB_AUDIO)
 206 #include "AudioContext.h"
 207 #endif
 208
 209 #if ENABLE(MEDIA_SESSION)
 210 #include "MediaSession.h"
 211 #include "MediaSessionManager.h"
 212 #endif
 213
 214 #if ENABLE(WIRELESS_PLAYBACK_TARGET)
 215 #include "MediaPlaybackTargetContext.h"
 216 #endif
 217
 218 using JSC::CallData;
 219 using JSC::CallType;
 220 using JSC::CodeBlock;
 221 using JSC::FunctionExecutable;
 222 using JSC::Identifier;
 223 using JSC::JSFunction;
 224 using JSC::JSGlobalObject;
 225 using JSC::JSObject;
 226 using JSC::JSValue;
 227 using JSC::MarkedArgumentBuffer;
 228 using JSC::PropertySlot;
 229 using JSC::ScriptExecutable;
 230 using JSC::StackVisitor;
 231
 232 using namespace Inspector;
 233
 234 namespace WebCore {
 235
 236 using namespace HTMLNames;
 237
 238 class InspectorStubFrontend final : public InspectorFrontendClientLocal, public FrontendChannel {
 239 public:
 240     InspectorStubFrontend(Page& inspectedPage, RefPtr<DOMWindow>&& frontendWindow);
 241     virtual ~InspectorStubFrontend();
 242
 243 private:
 244     void attachWindow(DockSide) final { }
 245     void detachWindow() final { }
 246     void closeWindow() final;
 247     void bringToFront() final { }
 248     String localizedStringsURL() final { return String(); }
 249     void inspectedURLChanged(const String&) final { }
 250     void setAttachedWindowHeight(unsigned) final { }
 251     void setAttachedWindowWidth(unsigned) final { }
 252
 253     bool sendMessageToFrontend(const String& message) final;
 254     ConnectionType connectionType() const final { return ConnectionType::Local; }
 255
 256     Page* frontendPage() const
 257     {
 258         if (!m_frontendWindow || !m_frontendWindow->document())
 259             return nullptr;
 260
 261         return m_frontendWindow->document()->page();
 262     }
 263
 264     RefPtr<DOMWindow> m_frontendWindow;
 265     InspectorController& m_frontendController;
 266 };
 267
 268 InspectorStubFrontend::InspectorStubFrontend(Page& inspectedPage, RefPtr<DOMWindow>&& frontendWindow)
 269     : InspectorFrontendClientLocal(&inspectedPage.inspectorController(), frontendWindow->document()->page(), std::make_unique<InspectorFrontendClientLocal::Settings>())
 270     , m_frontendWindow(frontendWindow.copyRef())
 271     , m_frontendController(frontendPage()->inspectorController())
 272 {
 273     ASSERT_ARG(frontendWindow, frontendWindow);
 274
 275     m_frontendController.setInspectorFrontendClient(this);
 276     inspectedPage.inspectorController().connectFrontend(this);
 277 }
 278
 279 InspectorStubFrontend::~InspectorStubFrontend()
 280 {
 281     closeWindow();
 282 }
 283
 284 void InspectorStubFrontend::closeWindow()
 285 {
 286     if (!m_frontendWindow)
 287         return;
 288
 289     m_frontendController.setInspectorFrontendClient(nullptr);
 290     inspectedPage()->inspectorController().disconnectFrontend(this);
 291
 292     m_frontendWindow->close();
 293     m_frontendWindow = nullptr;
 294 }
 295
 296 bool InspectorStubFrontend::sendMessageToFrontend(const String& message)
 297 {
 298     ASSERT_ARG(message, !message.isEmpty());
 299
 300     return InspectorClient::doDispatchMessageOnFrontendPage(frontendPage(), message);
 301 }
 302
 303 static bool markerTypeFrom(const String& markerType, DocumentMarker::MarkerType& result)
 304 {
 305     if (equalLettersIgnoringASCIICase(markerType, "spelling"))
 306         result = DocumentMarker::Spelling;
 307     else if (equalLettersIgnoringASCIICase(markerType, "grammar"))
 308         result = DocumentMarker::Grammar;
 309     else if (equalLettersIgnoringASCIICase(markerType, "textmatch"))
 310         result = DocumentMarker::TextMatch;
 311     else if (equalLettersIgnoringASCIICase(markerType, "replacement"))
 312         result = DocumentMarker::Replacement;
 313     else if (equalLettersIgnoringASCIICase(markerType, "correctionindicator"))
 314         result = DocumentMarker::CorrectionIndicator;
 315     else if (equalLettersIgnoringASCIICase(markerType, "rejectedcorrection"))
 316         result = DocumentMarker::RejectedCorrection;
 317     else if (equalLettersIgnoringASCIICase(markerType, "autocorrected"))
 318         result = DocumentMarker::Autocorrected;
 319     else if (equalLettersIgnoringASCIICase(markerType, "spellcheckingexemption"))
 320         result = DocumentMarker::SpellCheckingExemption;
 321     else if (equalLettersIgnoringASCIICase(markerType, "deletedautocorrection"))
 322         result = DocumentMarker::DeletedAutocorrection;
 323     else if (equalLettersIgnoringASCIICase(markerType, "dictationalternatives"))
 324         result = DocumentMarker::DictationAlternatives;
 325 #if ENABLE(TELEPHONE_NUMBER_DETECTION)
 326     else if (equalLettersIgnoringASCIICase(markerType, "telephonenumber"))
 327         result = DocumentMarker::TelephoneNumber;
 328 #endif
 329     else
 330         return false;
 331
 332     return true;
 333 }
 334
 335 static bool markerTypesFrom(const String& markerType, DocumentMarker::MarkerTypes& result)
 336 {
 337     DocumentMarker::MarkerType singularResult;
 338
 339     if (markerType.isEmpty() || equalLettersIgnoringASCIICase(markerType, "all"))
 340         result = DocumentMarker::AllMarkers();
 341     else if (markerTypeFrom(markerType, singularResult))
 342         result = singularResult;
 343     else
 344         return false;
 345
 346     return true;
 347 }
 348
 349 const char* Internals::internalsId = "internals";
 350
 351 Ref<Internals> Internals::create(Document& document)
 352 {
 353     return adoptRef(*new Internals(document));
 354 }
 355
 356 Internals::~Internals()
 357 {
 358 }
 359
 360 void Internals::resetToConsistentState(Page& page)
 361 {
 362     page.setPageScaleFactor(1, IntPoint(0, 0));
 363     page.setPagination(Pagination());
 364     page.setPaginationLineGridEnabled(false);
 365
 366     page.setDefersLoading(false);
 367
 368     page.mainFrame().setTextZoomFactor(1.0f);
 369
 370     FrameView* mainFrameView = page.mainFrame().view();
 371     if (mainFrameView) {
 372         mainFrameView->setHeaderHeight(0);
 373         mainFrameView->setFooterHeight(0);
 374         page.setTopContentInset(0);
 375         mainFrameView->setUseFixedLayout(false);
 376         mainFrameView->setFixedLayoutSize(IntSize());
 377 #if USE(COORDINATED_GRAPHICS)
 378         mainFrameView->setFixedVisibleContentRect(IntRect());
 379 #endif
 380     }
 381
 382     WebCore::overrideUserPreferredLanguages(Vector<String>());
 383     WebCore::Settings::setUsesOverlayScrollbars(false);
 384     WebCore::Settings::setUsesMockScrollAnimator(false);
 385 #if ENABLE(VIDEO_TRACK)
 386     page.group().captionPreferences().setTestingMode(true);
 387     page.group().captionPreferences().setCaptionsStyleSheetOverride(emptyString());
 388     page.group().captionPreferences().setTestingMode(false);
 389 #endif
 390     if (!page.mainFrame().editor().isContinuousSpellCheckingEnabled())
 391         page.mainFrame().editor().toggleContinuousSpellChecking();
 392     if (page.mainFrame().editor().isOverwriteModeEnabled())
 393         page.mainFrame().editor().toggleOverwriteModeEnabled();
 394     page.mainFrame().loader().clearTestingOverrides();
 395     page.applicationCacheStorage().setDefaultOriginQuota(ApplicationCacheStorage::noQuota());
 396 #if ENABLE(VIDEO)
 397     PlatformMediaSessionManager::sharedManager().resetRestrictions();
 398     PlatformMediaSessionManager::sharedManager().setWillIgnoreSystemInterruptions(true);
 399 #endif
 400 #if HAVE(ACCESSIBILITY)
 401     AXObjectCache::setEnhancedUserInterfaceAccessibility(false);
 402     AXObjectCache::disableAccessibility();
 403 #endif
 404
 405     MockPageOverlayClient::singleton().uninstallAllOverlays();
 406
 407 #if ENABLE(CONTENT_FILTERING)
 408     MockContentFilterSettings::reset();
 409 #endif
 410
 411 #if ENABLE(WIRELESS_PLAYBACK_TARGET)
 412     page.setMockMediaPlaybackTargetPickerEnabled(true);
 413     page.setMockMediaPlaybackTargetPickerState(emptyString(), MediaPlaybackTargetContext::Unknown);
 414 #endif
 415
 416     page.setShowAllPlugins(false);
 417 }
 418
 419 Internals::Internals(Document& document)
 420     : ContextDestructionObserver(&document)
 421 {
 422 #if ENABLE(VIDEO_TRACK)
 423     if (document.page())
 424         document.page()->group().captionPreferences().setTestingMode(true);
 425 #endif
 426
 427 #if ENABLE(MEDIA_STREAM)
 428     setMockMediaCaptureDevicesEnabled(true);
 429 #endif
 430
 431 #if ENABLE(WEB_RTC)
 432     enableMockMediaEndpoint();
 433     enableMockRTCPeerConnectionHandler();
 434 #endif
 435
 436 #if ENABLE(WIRELESS_PLAYBACK_TARGET)
 437     if (document.page())
 438         document.page()->setMockMediaPlaybackTargetPickerEnabled(true);
 439 #endif
 440     RuntimeEnabledFeatures::sharedFeatures().reset();
 441
 442     if (contextDocument() && contextDocument()->frame()) {
 443         setAutomaticSpellingCorrectionEnabled(true);
 444         setAutomaticQuoteSubstitutionEnabled(false);
 445         setAutomaticDashSubstitutionEnabled(false);
 446         setAutomaticLinkDetectionEnabled(false);
 447         setAutomaticTextReplacementEnabled(true);
 448     }
 449 }
 450
 451 Document* Internals::contextDocument() const
 452 {
 453     return downcast<Document>(scriptExecutionContext());
 454 }
 455
 456 Frame* Internals::frame() const
 457 {
 458     if (!contextDocument())
 459         return nullptr;
 460     return contextDocument()->frame();
 461 }
 462
 463 InternalSettings* Internals::settings() const
 464 {
 465     Document* document = contextDocument();
 466     if (!document)
 467         return nullptr;
 468     Page* page = document->page();
 469     if (!page)
 470         return nullptr;
 471     return InternalSettings::from(page);
 472 }
 473
 474 unsigned Internals::workerThreadCount() const
 475 {
 476     return WorkerThread::workerThreadCount();
 477 }
 478
 479 String Internals::address(Node& node)
 480 {
 481     return String::format("%p", &node);
 482 }
 483
 484 bool Internals::nodeNeedsStyleRecalc(Node& node)
 485 {
 486     return node.needsStyleRecalc();
 487 }
 488
 489 static String styleValidityToToString(Style::Validity validity)
 490 {
 491     switch (validity) {
 492     case Style::Validity::Valid:
 493         return "NoStyleChange";
 494     case Style::Validity::ElementInvalid:
 495         return "InlineStyleChange";
 496     case Style::Validity::SubtreeInvalid:
 497         return "FullStyleChange";
 498     case Style::Validity::SubtreeAndRenderersInvalid:
 499         return "ReconstructRenderTree";
 500     }
 501     ASSERT_NOT_REACHED();
 502     return "";
 503 }
 504
 505 String Internals::styleChangeType(Node& node)
 506 {
 507     node.document().styleScope().flushPendingUpdate();
 508
 509     return styleValidityToToString(node.styleValidity());
 510 }
 511
 512 String Internals::description(JSC::JSValue value)
 513 {
 514     return toString(value);
 515 }
 516
 517 bool Internals::isPreloaded(const String& url)
 518 {
 519     Document* document = contextDocument();
 520     return document->cachedResourceLoader().isPreloaded(url);
 521 }
 522
 523 bool Internals::isLoadingFromMemoryCache(const String& url)
 524 {
 525     if (!contextDocument() || !contextDocument()->page())
 526         return false;
 527
 528     ResourceRequest request(contextDocument()->completeURL(url));
 529 #if ENABLE(CACHE_PARTITIONING)
 530     request.setDomainForCachePartition(contextDocument()->topOrigin()->domainForCachePartition());
 531 #endif
 532     CachedResource* resource = MemoryCache::singleton().resourceForRequest(request, contextDocument()->page()->sessionID());
 533     return resource && resource->status() == CachedResource::Cached;
 534 }
 535
 536 String Internals::xhrResponseSource(XMLHttpRequest& request)
 537 {
 538     if (request.resourceResponse().isNull())
 539         return "Null response";
 540     switch (request.resourceResponse().source()) {
 541     case ResourceResponse::Source::Unknown:
 542         return "Unknown";
 543     case ResourceResponse::Source::Network:
 544         return "Network";
 545     case ResourceResponse::Source::DiskCache:
 546         return "Disk cache";
 547     case ResourceResponse::Source::DiskCacheAfterValidation:
 548         return "Disk cache after validation";
 549     case ResourceResponse::Source::MemoryCache:
 550         return "Memory cache";
 551     case ResourceResponse::Source::MemoryCacheAfterValidation:
 552         return "Memory cache after validation";
 553     }
 554     ASSERT_NOT_REACHED();
 555     return "Error";
 556 }
 557
 558 bool Internals::isSharingStyleSheetContents(HTMLLinkElement& a, HTMLLinkElement& b)
 559 {
 560     if (!a.sheet() || !b.sheet())
 561         return false;
 562     return &a.sheet()->contents() == &b.sheet()->contents();
 563 }
 564
 565 bool Internals::isStyleSheetLoadingSubresources(HTMLLinkElement& link)
 566 {
 567     return link.sheet() && link.sheet()->contents().isLoadingSubresources();
 568 }
 569
 570 static ResourceRequestCachePolicy toResourceRequestCachePolicy(Internals::CachePolicy policy)
 571 {
 572     switch (policy) {
 573     case Internals::CachePolicy::UseProtocolCachePolicy:
 574         return UseProtocolCachePolicy;
 575     case Internals::CachePolicy::ReloadIgnoringCacheData:
 576         return ReloadIgnoringCacheData;
 577     case Internals::CachePolicy::ReturnCacheDataElseLoad:
 578         return ReturnCacheDataElseLoad;
 579     case Internals::CachePolicy::ReturnCacheDataDontLoad:
 580         return ReturnCacheDataDontLoad;
 581     }
 582     ASSERT_NOT_REACHED();
 583     return UseProtocolCachePolicy;
 584 }
 585
 586 void Internals::setOverrideCachePolicy(CachePolicy policy)
 587 {
 588     frame()->loader().setOverrideCachePolicyForTesting(toResourceRequestCachePolicy(policy));
 589 }
 590
 591 ExceptionOr<void> Internals::setCanShowModalDialogOverride(bool allow)
 592 {
 593     if (!contextDocument() || !contextDocument()->domWindow())
 594         return Exception { INVALID_ACCESS_ERR };
 595
 596     contextDocument()->domWindow()->setCanShowModalDialogOverride(allow);
 597     return { };
 598 }
 599
 600 static ResourceLoadPriority toResourceLoadPriority(Internals::ResourceLoadPriority priority)
 601 {
 602     switch (priority) {
 603     case Internals::ResourceLoadPriority::ResourceLoadPriorityVeryLow:
 604         return ResourceLoadPriority::VeryLow;
 605     case Internals::ResourceLoadPriority::ResourceLoadPriorityLow:
 606         return ResourceLoadPriority::Low;
 607     case Internals::ResourceLoadPriority::ResourceLoadPriorityMedium:
 608         return ResourceLoadPriority::Medium;
 609     case Internals::ResourceLoadPriority::ResourceLoadPriorityHigh:
 610         return ResourceLoadPriority::High;
 611     case Internals::ResourceLoadPriority::ResourceLoadPriorityVeryHigh:
 612         return ResourceLoadPriority::VeryHigh;
 613     }
 614     ASSERT_NOT_REACHED();
 615     return ResourceLoadPriority::Low;
 616 }
 617
 618 void Internals::setOverrideResourceLoadPriority(ResourceLoadPriority priority)
 619 {
 620     frame()->loader().setOverrideResourceLoadPriorityForTesting(toResourceLoadPriority(priority));
 621 }
 622
 623 void Internals::setStrictRawResourceValidationPolicyDisabled(bool disabled)
 624 {
 625     frame()->loader().setStrictRawResourceValidationPolicyDisabledForTesting(disabled);
 626 }
 627
 628 void Internals::clearMemoryCache()
 629 {
 630     MemoryCache::singleton().evictResources();
 631 }
 632
 633 void Internals::pruneMemoryCacheToSize(unsigned size)
 634 {
 635     MemoryCache::singleton().pruneDeadResourcesToSize(size);
 636     MemoryCache::singleton().pruneLiveResourcesToSize(size, true);
 637 }
 638
 639 unsigned Internals::memoryCacheSize() const
 640 {
 641     return MemoryCache::singleton().size();
 642 }
 643
 644 unsigned Internals::imageFrameIndex(HTMLImageElement& element)
 645 {
 646     auto* cachedImage = element.cachedImage();
 647     if (!cachedImage)
 648         return 0;
 649
 650     auto* image = cachedImage->image();
 651     return is<BitmapImage>(image) ? downcast<BitmapImage>(*image).currentFrame() : 0;
 652 }
 653
 654 void Internals::clearPageCache()
 655 {
 656     PageCache::singleton().pruneToSizeNow(0, PruningReason::None);
 657 }
 658
 659 unsigned Internals::pageCacheSize() const
 660 {
 661     return PageCache::singleton().pageCount();
 662 }
 663
 664 Node* Internals::treeScopeRootNode(Node& node)
 665 {
 666     return &node.treeScope().rootNode();
 667 }
 668
 669 Node* Internals::parentTreeScope(Node& node)
 670 {
 671     const TreeScope* parentTreeScope = node.treeScope().parentTreeScope();
 672     return parentTreeScope ? &parentTreeScope->rootNode() : nullptr;
 673 }
 674
 675 ExceptionOr<unsigned> Internals::lastSpatialNavigationCandidateCount() const
 676 {
 677     if (!contextDocument() || !contextDocument()->page())
 678         return Exception { INVALID_ACCESS_ERR };
 679
 680     return contextDocument()->page()->lastSpatialNavigationCandidateCount();
 681 }
 682
 683 unsigned Internals::numberOfActiveAnimations() const
 684 {
 685     return frame()->animation().numberOfActiveAnimations(frame()->document());
 686 }
 687
 688 ExceptionOr<bool> Internals::animationsAreSuspended() const
 689 {
 690     Document* document = contextDocument();
 691     if (!document || !document->frame())
 692         return Exception { INVALID_ACCESS_ERR };
 693
 694     return document->frame()->animation().isSuspended();
 695 }
 696
 697 ExceptionOr<void> Internals::suspendAnimations() const
 698 {
 699     Document* document = contextDocument();
 700     if (!document || !document->frame())
 701         return Exception { INVALID_ACCESS_ERR };
 702
 703     document->frame()->animation().suspendAnimations();
 704     return { };
 705 }
 706
 707 ExceptionOr<void> Internals::resumeAnimations() const
 708 {
 709     Document* document = contextDocument();
 710     if (!document || !document->frame())
 711         return Exception { INVALID_ACCESS_ERR };
 712
 713     document->frame()->animation().resumeAnimations();
 714     return { };
 715 }
 716
 717 ExceptionOr<bool> Internals::pauseAnimationAtTimeOnElement(const String& animationName, double pauseTime, Element& element)
 718 {
 719     if (pauseTime < 0)
 720         return Exception { INVALID_ACCESS_ERR };
 721     return frame()->animation().pauseAnimationAtTime(element.renderer(), AtomicString(animationName), pauseTime);
 722 }
 723
 724 ExceptionOr<bool> Internals::pauseAnimationAtTimeOnPseudoElement(const String& animationName, double pauseTime, Element& element, const String& pseudoId)
 725 {
 726     if (pauseTime < 0)
 727         return Exception { INVALID_ACCESS_ERR };
 728
 729     if (pseudoId != "before" && pseudoId != "after")
 730         return Exception { INVALID_ACCESS_ERR };
 731
 732     PseudoElement* pseudoElement = pseudoId == "before" ? element.beforePseudoElement() : element.afterPseudoElement();
 733     if (!pseudoElement)
 734         return Exception { INVALID_ACCESS_ERR };
 735
 736     return frame()->animation().pauseAnimationAtTime(pseudoElement->renderer(), AtomicString(animationName), pauseTime);
 737 }
 738
 739 ExceptionOr<bool> Internals::pauseTransitionAtTimeOnElement(const String& propertyName, double pauseTime, Element& element)
 740 {
 741     if (pauseTime < 0)
 742         return Exception { INVALID_ACCESS_ERR };
 743     return frame()->animation().pauseTransitionAtTime(element.renderer(), propertyName, pauseTime);
 744 }
 745
 746 ExceptionOr<bool> Internals::pauseTransitionAtTimeOnPseudoElement(const String& property, double pauseTime, Element& element, const String& pseudoId)
 747 {
 748     if (pauseTime < 0)
 749         return Exception { INVALID_ACCESS_ERR };
 750
 751     if (pseudoId != "before" && pseudoId != "after")
 752         return Exception { INVALID_ACCESS_ERR };
 753
 754     PseudoElement* pseudoElement = pseudoId == "before" ? element.beforePseudoElement() : element.afterPseudoElement();
 755     if (!pseudoElement)
 756         return Exception { INVALID_ACCESS_ERR };
 757
 758     return frame()->animation().pauseTransitionAtTime(pseudoElement->renderer(), property, pauseTime);
 759 }
 760
 761 ExceptionOr<String> Internals::elementRenderTreeAsText(Element& element)
 762 {
 763     element.document().updateStyleIfNeeded();
 764
 765     String representation = externalRepresentation(&element);
 766     if (representation.isEmpty())
 767         return Exception { INVALID_ACCESS_ERR };
 768
 769     return WTFMove(representation);
 770 }
 771
 772 bool Internals::hasPausedImageAnimations(Element& element)
 773 {
 774     return element.renderer() && element.renderer()->hasPausedImageAnimations();
 775 }
 776
 777 RefPtr<CSSComputedStyleDeclaration> Internals::computedStyleIncludingVisitedInfo(Element& element) const
 778 {
 779     bool allowVisitedStyle = true;
 780     return CSSComputedStyleDeclaration::create(element, allowVisitedStyle);
 781 }
 782
 783 ExceptionOr<Node*> Internals::ensureShadowRoot(Element& host)
 784 {
 785     if (ShadowRoot* shadowRoot = host.shadowRoot())
 786         return shadowRoot;
 787
 788     ExceptionCode ec = 0;
 789     auto result = host.createShadowRoot(ec);
 790     if (ec)
 791         return Exception { ec };
 792     return result;
 793 }
 794
 795 Node* Internals::ensureUserAgentShadowRoot(Element& host)
 796 {
 797     return &host.ensureUserAgentShadowRoot();
 798 }
 799
 800 ExceptionOr<Node*> Internals::createShadowRoot(Element& host)
 801 {
 802     ExceptionCode ec = 0;
 803     auto result = host.createShadowRoot(ec);
 804     if (ec)
 805         return Exception { ec };
 806     return result;
 807 }
 808
 809 Node* Internals::shadowRoot(Element& host)
 810 {
 811     return host.shadowRoot();
 812 }
 813
 814 ExceptionOr<String> Internals::shadowRootType(const Node& root) const
 815 {
 816     if (!is<ShadowRoot>(root))
 817         return Exception { INVALID_ACCESS_ERR };
 818
 819     switch (downcast<ShadowRoot>(root).mode()) {
 820     case ShadowRoot::Mode::UserAgent:
 821         return String("UserAgentShadowRoot");
 822     case ShadowRoot::Mode::Closed:
 823         return String("ClosedShadowRoot");
 824     case ShadowRoot::Mode::Open:
 825         return String("OpenShadowRoot");
 826     default:
 827         ASSERT_NOT_REACHED();
 828         return String("Unknown");
 829     }
 830 }
 831
 832 String Internals::shadowPseudoId(Element& element)
 833 {
 834     return element.shadowPseudoId().string();
 835 }
 836
 837 void Internals::setShadowPseudoId(Element& element, const String& id)
 838 {
 839     return element.setPseudo(id);
 840 }
 841
 842 ExceptionOr<bool> Internals::isTimerThrottled(int timeoutId)
 843 {
 844     DOMTimer* timer = scriptExecutionContext()->findTimeout(timeoutId);
 845     if (!timer)
 846         return Exception { NOT_FOUND_ERR };
 847     return timer->m_throttleState == DOMTimer::ShouldThrottle;
 848 }
 849
 850 bool Internals::isRequestAnimationFrameThrottled() const
 851 {
 852 #if ENABLE(REQUEST_ANIMATION_FRAME)
 853     auto* scriptedAnimationController = contextDocument()->scriptedAnimationController();
 854     if (!scriptedAnimationController)
 855         return false;
 856     return scriptedAnimationController->isThrottled();
 857 #else
 858     return false;
 859 #endif
 860 }
 861
 862 bool Internals::areTimersThrottled() const
 863 {
 864     return contextDocument()->isTimerThrottlingEnabled();
 865 }
 866
 867 String Internals::visiblePlaceholder(Element& element)
 868 {
 869     if (is<HTMLTextFormControlElement>(element)) {
 870         const HTMLTextFormControlElement& textFormControlElement = downcast<HTMLTextFormControlElement>(element);
 871         if (!textFormControlElement.isPlaceholderVisible())
 872             return String();
 873         if (HTMLElement* placeholderElement = textFormControlElement.placeholderElement())
 874             return placeholderElement->textContent();
 875     }
 876
 877     return String();
 878 }
 879
 880 void Internals::selectColorInColorChooser(HTMLInputElement& element, const String& colorValue)
 881 {
 882     element.selectColor(Color(colorValue));
 883 }
 884
 885 ExceptionOr<Vector<String>> Internals::formControlStateOfPreviousHistoryItem()
 886 {
 887     HistoryItem* mainItem = frame()->loader().history().previousItem();
 888     if (!mainItem)
 889         return Exception { INVALID_ACCESS_ERR };
 890     String uniqueName = frame()->tree().uniqueName();
 891     if (mainItem->target() != uniqueName && !mainItem->childItemWithTarget(uniqueName))
 892         return Exception { INVALID_ACCESS_ERR };
 893     return Vector<String> { mainItem->target() == uniqueName ? mainItem->documentState() : mainItem->childItemWithTarget(uniqueName)->documentState() };
 894 }
 895
 896 ExceptionOr<void> Internals::setFormControlStateOfPreviousHistoryItem(const Vector<String>& state)
 897 {
 898     HistoryItem* mainItem = frame()->loader().history().previousItem();
 899     if (!mainItem)
 900         return Exception { INVALID_ACCESS_ERR };
 901     String uniqueName = frame()->tree().uniqueName();
 902     if (mainItem->target() == uniqueName)
 903         mainItem->setDocumentState(state);
 904     else if (HistoryItem* subItem = mainItem->childItemWithTarget(uniqueName))
 905         subItem->setDocumentState(state);
 906     else
 907         return Exception { INVALID_ACCESS_ERR };
 908     return { };
 909 }
 910
 911 #if ENABLE(SPEECH_SYNTHESIS)
 912
 913 void Internals::enableMockSpeechSynthesizer()
 914 {
 915     Document* document = contextDocument();
 916     if (!document || !document->domWindow())
 917         return;
 918     SpeechSynthesis* synthesis = DOMWindowSpeechSynthesis::speechSynthesis(*document->domWindow());
 919     if (!synthesis)
 920         return;
 921
 922     synthesis->setPlatformSynthesizer(std::make_unique<PlatformSpeechSynthesizerMock>(synthesis));
 923 }
 924
 925 #endif
 926
 927 #if ENABLE(WEB_RTC)
 928
 929 void Internals::enableMockMediaEndpoint()
 930 {
 931     MediaEndpoint::create = MockMediaEndpoint::create;
 932 }
 933
 934 void Internals::enableMockRTCPeerConnectionHandler()
 935 {
 936     RTCPeerConnectionHandler::create = RTCPeerConnectionHandlerMock::create;
 937 }
 938
 939 void Internals::emulateRTCPeerConnectionPlatformEvent(RTCPeerConnection& connection, const String& action)
 940 {
 941     connection.emulatePlatformEvent(action);
 942 }
 943
 944 #endif
 945
 946 #if ENABLE(MEDIA_STREAM)
 947
 948 void Internals::setMockMediaCaptureDevicesEnabled(bool enabled)
 949 {
 950     WebCore::Settings::setMockCaptureDevicesEnabled(enabled);
 951 }
 952
 953 #endif
 954
 955 ExceptionOr<Ref<ClientRect>> Internals::absoluteCaretBounds()
 956 {
 957     Document* document = contextDocument();
 958     if (!document || !document->frame())
 959         return Exception { INVALID_ACCESS_ERR };
 960
 961     return ClientRect::create(document->frame()->selection().absoluteCaretBounds());
 962 }
 963
 964 Ref<ClientRect> Internals::boundingBox(Element& element)
 965 {
 966     element.document().updateLayoutIgnorePendingStylesheets();
 967     auto renderer = element.renderer();
 968     if (!renderer)
 969         return ClientRect::create();
 970     return ClientRect::create(renderer->absoluteBoundingBoxRectIgnoringTransforms());
 971 }
 972
 973 ExceptionOr<Ref<ClientRectList>> Internals::inspectorHighlightRects()
 974 {
 975     Document* document = contextDocument();
 976     if (!document || !document->page())
 977         return Exception { INVALID_ACCESS_ERR };
 978
 979     Highlight highlight;
 980     document->page()->inspectorController().getHighlight(highlight, InspectorOverlay::CoordinateSystem::View);
 981     return ClientRectList::create(highlight.quads);
 982 }
 983
 984 ExceptionOr<String> Internals::inspectorHighlightObject()
 985 {
 986     Document* document = contextDocument();
 987     if (!document || !document->page())
 988         return Exception { INVALID_ACCESS_ERR };
 989
 990     return document->page()->inspectorController().buildObjectForHighlightedNodes()->toJSONString();
 991 }
 992
 993 ExceptionOr<unsigned> Internals::markerCountForNode(Node& node, const String& markerType)
 994 {
 995     DocumentMarker::MarkerTypes markerTypes = 0;
 996     if (!markerTypesFrom(markerType, markerTypes))
 997         return Exception { SYNTAX_ERR };
 998
 999     node.document().frame()->editor().updateEditorUINowIfScheduled();
1000     return node.document().markers().markersFor(&node, markerTypes).size();
1001 }
1002
1003 ExceptionOr<RenderedDocumentMarker*> Internals::markerAt(Node& node, const String& markerType, unsigned index)
1004 {
1005     node.document().updateLayoutIgnorePendingStylesheets();
1006
1007     DocumentMarker::MarkerTypes markerTypes = 0;
1008     if (!markerTypesFrom(markerType, markerTypes))
1009         return Exception { SYNTAX_ERR };
1010
1011     node.document().frame()->editor().updateEditorUINowIfScheduled();
1012
1013     Vector<RenderedDocumentMarker*> markers = node.document().markers().markersFor(&node, markerTypes);
1014     if (markers.size() <= index)
1015         return nullptr;
1016     return markers[index];
1017 }
1018
1019 ExceptionOr<RefPtr<Range>> Internals::markerRangeForNode(Node& node, const String& markerType, unsigned index)
1020 {
1021     auto result = markerAt(node, markerType, index);
1022     if (result.hasException())
1023         return result.releaseException();
1024     auto marker = result.releaseReturnValue();
1025     if (!marker)
1026         return nullptr;
1027     return RefPtr<Range> { Range::create(node.document(), &node, marker->startOffset(), &node, marker->endOffset()) };
1028 }
1029
1030 ExceptionOr<String> Internals::markerDescriptionForNode(Node& node, const String& markerType, unsigned index)
1031 {
1032     auto result = markerAt(node, markerType, index);
1033     if (result.hasException())
1034         return result.releaseException();
1035     auto marker = result.releaseReturnValue();
1036     if (!marker)
1037         return String();
1038     return String { marker->description() };
1039 }
1040
1041 ExceptionOr<String> Internals::dumpMarkerRects(const String& markerTypeString)
1042 {
1043     DocumentMarker::MarkerType markerType;
1044     if (!markerTypeFrom(markerTypeString, markerType))
1045         return Exception { SYNTAX_ERR };
1046
1047     contextDocument()->markers().updateRectsForInvalidatedMarkersOfType(markerType);
1048     auto rects = contextDocument()->markers().renderedRectsForMarkers(markerType);
1049
1050     StringBuilder rectString;
1051     rectString.appendLiteral("marker rects: ");
1052     for (const auto& rect : rects) {
1053         rectString.append('(');
1054         rectString.appendNumber(rect.x());
1055         rectString.appendLiteral(", ");
1056         rectString.appendNumber(rect.y());
1057         rectString.appendLiteral(", ");
1058         rectString.appendNumber(rect.width());
1059         rectString.appendLiteral(", ");
1060         rectString.appendNumber(rect.height());
1061         rectString.appendLiteral(") ");
1062     }
1063     return rectString.toString();
1064 }
1065
1066 void Internals::addTextMatchMarker(const Range& range, bool isActive)
1067 {
1068     range.ownerDocument().updateLayoutIgnorePendingStylesheets();
1069     range.ownerDocument().markers().addTextMatchMarker(&range, isActive);
1070 }
1071
1072 ExceptionOr<void> Internals::setMarkedTextMatchesAreHighlighted(bool flag)
1073 {
1074     Document* document = contextDocument();
1075     if (!document || !document->frame())
1076         return Exception { INVALID_ACCESS_ERR };
1077     document->frame()->editor().setMarkedTextMatchesAreHighlighted(flag);
1078     return { };
1079 }
1080
1081 void Internals::invalidateFontCache()
1082 {
1083     FontCache::singleton().invalidate();
1084 }
1085
1086 ExceptionOr<void> Internals::setScrollViewPosition(int x, int y)
1087 {
1088     Document* document = contextDocument();
1089     if (!document || !document->view())
1090         return Exception { INVALID_ACCESS_ERR };
1091
1092     auto& frameView = *document->view();
1093     bool constrainsScrollingToContentEdgeOldValue = frameView.constrainsScrollingToContentEdge();
1094     bool scrollbarsSuppressedOldValue = frameView.scrollbarsSuppressed();
1095
1096     frameView.setConstrainsScrollingToContentEdge(false);
1097     frameView.setScrollbarsSuppressed(false);
1098     frameView.setScrollOffsetFromInternals({ x, y });
1099     frameView.setScrollbarsSuppressed(scrollbarsSuppressedOldValue);
1100     frameView.setConstrainsScrollingToContentEdge(constrainsScrollingToContentEdgeOldValue);
1101
1102     return { };
1103 }
1104
1105 ExceptionOr<void> Internals::setViewBaseBackgroundColor(const String& colorValue)
1106 {
1107     Document* document = contextDocument();
1108     if (!document || !document->view())
1109         return Exception { INVALID_ACCESS_ERR };
1110
1111     document->view()->setBaseBackgroundColor(Color(colorValue));
1112     return { };
1113 }
1114
1115 ExceptionOr<void> Internals::setPagination(const String& mode, int gap, int pageLength)
1116 {
1117     Document* document = contextDocument();
1118     if (!document || !document->page())
1119         return Exception { INVALID_ACCESS_ERR };
1120
1121     Pagination pagination;
1122     if (mode == "Unpaginated")
1123         pagination.mode = Pagination::Unpaginated;
1124     else if (mode == "LeftToRightPaginated")
1125         pagination.mode = Pagination::LeftToRightPaginated;
1126     else if (mode == "RightToLeftPaginated")
1127         pagination.mode = Pagination::RightToLeftPaginated;
1128     else if (mode == "TopToBottomPaginated")
1129         pagination.mode = Pagination::TopToBottomPaginated;
1130     else if (mode == "BottomToTopPaginated")
1131         pagination.mode = Pagination::BottomToTopPaginated;
1132     else
1133         return Exception { SYNTAX_ERR };
1134
1135     pagination.gap = gap;
1136     pagination.pageLength = pageLength;
1137     document->page()->setPagination(pagination);
1138
1139     return { };
1140 }
1141
1142 ExceptionOr<void> Internals::setPaginationLineGridEnabled(bool enabled)
1143 {
1144     Document* document = contextDocument();
1145     if (!document || !document->page())
1146         return Exception { INVALID_ACCESS_ERR };
1147     document->page()->setPaginationLineGridEnabled(enabled);
1148     return { };
1149 }
1150
1151 ExceptionOr<String> Internals::configurationForViewport(float devicePixelRatio, int deviceWidth, int deviceHeight, int availableWidth, int availableHeight)
1152 {
1153     Document* document = contextDocument();
1154     if (!document || !document->page())
1155         return Exception { INVALID_ACCESS_ERR };
1156
1157     const int defaultLayoutWidthForNonMobilePages = 980;
1158
1159     ViewportArguments arguments = document->page()->viewportArguments();
1160     ViewportAttributes attributes = computeViewportAttributes(arguments, defaultLayoutWidthForNonMobilePages, deviceWidth, deviceHeight, devicePixelRatio, IntSize(availableWidth, availableHeight));
1161     restrictMinimumScaleFactorToViewportSize(attributes, IntSize(availableWidth, availableHeight), devicePixelRatio);
1162     restrictScaleFactorToInitialScaleIfNotUserScalable(attributes);
1163
1164     return String { "viewport size " + String::number(attributes.layoutSize.width()) + "x" + String::number(attributes.layoutSize.height()) + " scale " + String::number(attributes.initialScale) + " with limits [" + String::number(attributes.minimumScale) + ", " + String::number(attributes.maximumScale) + "] and userScalable " + (attributes.userScalable ? "true" : "false") };
1165 }
1166
1167 ExceptionOr<bool> Internals::wasLastChangeUserEdit(Element& textField)
1168 {
1169     if (is<HTMLInputElement>(textField))
1170         return downcast<HTMLInputElement>(textField).lastChangeWasUserEdit();
1171
1172     if (is<HTMLTextAreaElement>(textField))
1173         return downcast<HTMLTextAreaElement>(textField).lastChangeWasUserEdit();
1174
1175     return Exception { INVALID_NODE_TYPE_ERR };
1176 }
1177
1178 bool Internals::elementShouldAutoComplete(HTMLInputElement& element)
1179 {
1180     return element.shouldAutocomplete();
1181 }
1182
1183 void Internals::setEditingValue(HTMLInputElement& element, const String& value)
1184 {
1185     element.setEditingValue(value);
1186 }
1187
1188 void Internals::setAutofilled(HTMLInputElement& element, bool enabled)
1189 {
1190     element.setAutoFilled(enabled);
1191 }
1192
1193 static AutoFillButtonType toAutoFillButtonType(Internals::AutoFillButtonType type)
1194 {
1195     switch (type) {
1196     case Internals::AutoFillButtonType::AutoFillButtonTypeNone:
1197         return AutoFillButtonType::None;
1198     case Internals::AutoFillButtonType::AutoFillButtonTypeCredentials:
1199         return AutoFillButtonType::Credentials;
1200     case Internals::AutoFillButtonType::AutoFillButtonTypeContacts:
1201         return AutoFillButtonType::Contacts;
1202     }
1203     ASSERT_NOT_REACHED();
1204     return AutoFillButtonType::None;
1205 }
1206
1207 void Internals::setShowAutoFillButton(HTMLInputElement& element, AutoFillButtonType type)
1208 {
1209     element.setShowAutoFillButton(toAutoFillButtonType(type));
1210 }
1211
1212 ExceptionOr<void> Internals::scrollElementToRect(Element& element, int x, int y, int w, int h)
1213 {
1214     FrameView* frameView = element.document().view();
1215     if (!frameView)
1216         return Exception { INVALID_ACCESS_ERR };
1217     frameView->scrollElementToRect(element, { x, y, w, h });
1218     return { };
1219 }
1220
1221 ExceptionOr<String> Internals::autofillFieldName(Element& element)
1222 {
1223     if (!is<HTMLFormControlElement>(element))
1224         return Exception { INVALID_NODE_TYPE_ERR };
1225
1226     return String { downcast<HTMLFormControlElement>(element).autofillData().fieldName };
1227 }
1228
1229 ExceptionOr<void> Internals::paintControlTints()
1230 {
1231     Document* document = contextDocument();
1232     if (!document || !document->view())
1233         return Exception { INVALID_ACCESS_ERR };
1234
1235     document->view()->paintControlTints();
1236     return { };
1237 }
1238
1239 RefPtr<Range> Internals::rangeFromLocationAndLength(Element& scope, int rangeLocation, int rangeLength)
1240 {
1241     return TextIterator::rangeFromLocationAndLength(&scope, rangeLocation, rangeLength);
1242 }
1243
1244 unsigned Internals::locationFromRange(Element& scope, const Range& range)
1245 {
1246     size_t location = 0;
1247     size_t unusedLength = 0;
1248     TextIterator::getLocationAndLengthFromRange(&scope, &range, location, unusedLength);
1249     return location;
1250 }
1251
1252 unsigned Internals::lengthFromRange(Element& scope, const Range& range)
1253 {
1254     size_t unusedLocation = 0;
1255     size_t length = 0;
1256     TextIterator::getLocationAndLengthFromRange(&scope, &range, unusedLocation, length);
1257     return length;
1258 }
1259
1260 String Internals::rangeAsText(const Range& range)
1261 {
1262     return range.text();
1263 }
1264
1265 RefPtr<Range> Internals::subrange(Range& range, int rangeLocation, int rangeLength)
1266 {
1267     return TextIterator::subrange(&range, rangeLocation, rangeLength);
1268 }
1269
1270 ExceptionOr<RefPtr<Range>> Internals::rangeForDictionaryLookupAtLocation(int x, int y)
1271 {
1272 #if PLATFORM(MAC)
1273     Document* document = contextDocument();
1274     if (!document || !document->frame())
1275         return Exception { INVALID_ACCESS_ERR };
1276
1277     document->updateLayoutIgnorePendingStylesheets();
1278
1279     HitTestResult result = document->frame()->mainFrame().eventHandler().hitTestResultAtPoint(IntPoint(x, y));
1280     NSDictionary *options = nullptr;
1281     return DictionaryLookup::rangeAtHitTestResult(result, &options);
1282 #else
1283     UNUSED_PARAM(x);
1284     UNUSED_PARAM(y);
1285     return Exception { INVALID_ACCESS_ERR };
1286 #endif
1287 }
1288
1289 ExceptionOr<void> Internals::setDelegatesScrolling(bool enabled)
1290 {
1291     Document* document = contextDocument();
1292     // Delegate scrolling is valid only on mainframe's view.
1293     if (!document || !document->view() || !document->page() || &document->page()->mainFrame() != document->frame())
1294         return Exception { INVALID_ACCESS_ERR };
1295
1296     document->view()->setDelegatesScrolling(enabled);
1297     return { };
1298 }
1299
1300 ExceptionOr<int> Internals::lastSpellCheckRequestSequence()
1301 {
1302     Document* document = contextDocument();
1303     if (!document || !document->frame())
1304         return Exception { INVALID_ACCESS_ERR };
1305
1306     return document->frame()->editor().spellChecker().lastRequestSequence();
1307 }
1308
1309 ExceptionOr<int> Internals::lastSpellCheckProcessedSequence()
1310 {
1311     Document* document = contextDocument();
1312     if (!document || !document->frame())
1313         return Exception { INVALID_ACCESS_ERR };
1314
1315     return document->frame()->editor().spellChecker().lastProcessedSequence();
1316 }
1317
1318 Vector<String> Internals::userPreferredLanguages() const
1319 {
1320     return WebCore::userPreferredLanguages();
1321 }
1322
1323 void Internals::setUserPreferredLanguages(const Vector<String>& languages)
1324 {
1325     WebCore::overrideUserPreferredLanguages(languages);
1326 }
1327
1328 Vector<String> Internals::userPreferredAudioCharacteristics() const
1329 {
1330     Document* document = contextDocument();
1331     if (!document || !document->page())
1332         return Vector<String>();
1333 #if ENABLE(VIDEO_TRACK)
1334     return document->page()->group().captionPreferences().preferredAudioCharacteristics();
1335 #else
1336     return Vector<String>();
1337 #endif
1338 }
1339
1340 void Internals::setUserPreferredAudioCharacteristic(const String& characteristic)
1341 {
1342     Document* document = contextDocument();
1343     if (!document || !document->page())
1344         return;
1345 #if ENABLE(VIDEO_TRACK)
1346     document->page()->group().captionPreferences().setPreferredAudioCharacteristic(characteristic);
1347 #else
1348     UNUSED_PARAM(characteristic);
1349 #endif
1350 }
1351
1352 ExceptionOr<unsigned> Internals::wheelEventHandlerCount()
1353 {
1354     Document* document = contextDocument();
1355     if (!document)
1356         return Exception { INVALID_ACCESS_ERR };
1357
1358     return document->wheelEventHandlerCount();
1359 }
1360
1361 ExceptionOr<unsigned> Internals::touchEventHandlerCount()
1362 {
1363     Document* document = contextDocument();
1364     if (!document)
1365         return Exception { INVALID_ACCESS_ERR };
1366
1367     return document->touchEventHandlerCount();
1368 }
1369
1370 // FIXME: Remove the document argument. It is almost always the same as
1371 // contextDocument(), with the exception of a few tests that pass a
1372 // different document, and could just make the call through another Internals
1373 // instance instead.
1374 ExceptionOr<RefPtr<NodeList>> Internals::nodesFromRect(Document& document, int centerX, int centerY, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding, bool ignoreClipping, bool allowShadowContent, bool allowChildFrameContent) const
1375 {
1376     if (!document.frame() || !document.frame()->view())
1377         return Exception { INVALID_ACCESS_ERR };
1378
1379     Frame* frame = document.frame();
1380     FrameView* frameView = document.view();
1381     RenderView* renderView = document.renderView();
1382     if (!renderView)
1383         return nullptr;
1384
1385     document.updateLayoutIgnorePendingStylesheets();
1386
1387     float zoomFactor = frame->pageZoomFactor();
1388     LayoutPoint point(centerX * zoomFactor + frameView->scrollX(), centerY * zoomFactor + frameView->scrollY());
1389
1390     HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active;
1391     if (ignoreClipping)
1392         hitType |= HitTestRequest::IgnoreClipping;
1393     if (!allowShadowContent)
1394         hitType |= HitTestRequest::DisallowUserAgentShadowContent;
1395     if (allowChildFrameContent)
1396         hitType |= HitTestRequest::AllowChildFrameContent;
1397
1398     HitTestRequest request(hitType);
1399
1400     // When ignoreClipping is false, this method returns null for coordinates outside of the viewport.
1401     if (!request.ignoreClipping() && !frameView->visibleContentRect().intersects(HitTestLocation::rectForPoint(point, topPadding, rightPadding, bottomPadding, leftPadding)))
1402         return nullptr;
1403
1404     Vector<Ref<Node>> matches;
1405
1406     // Need padding to trigger a rect based hit test, but we want to return a NodeList
1407     // so we special case this.
1408     if (!topPadding && !rightPadding && !bottomPadding && !leftPadding) {
1409         HitTestResult result(point);
1410         renderView->hitTest(request, result);
1411         if (result.innerNode())
1412             matches.append(*result.innerNode()->deprecatedShadowAncestorNode());
1413     } else {
1414         HitTestResult result(point, topPadding, rightPadding, bottomPadding, leftPadding);
1415         renderView->hitTest(request, result);
1416
1417         const HitTestResult::NodeSet& nodeSet = result.rectBasedTestResult();
1418         matches.reserveInitialCapacity(nodeSet.size());
1419         for (auto& node : nodeSet)
1420             matches.uncheckedAppend(*node);
1421     }
1422
1423     return RefPtr<NodeList> { StaticNodeList::create(WTFMove(matches)) };
1424 }
1425
1426 class GetCallerCodeBlockFunctor {
1427 public:
1428     GetCallerCodeBlockFunctor()
1429         : m_iterations(0)
1430         , m_codeBlock(0)
1431     {
1432     }
1433
1434     StackVisitor::Status operator()(StackVisitor& visitor) const
1435     {
1436         ++m_iterations;
1437         if (m_iterations < 2)
1438             return StackVisitor::Continue;
1439
1440         m_codeBlock = visitor->codeBlock();
1441         return StackVisitor::Done;
1442     }
1443
1444     CodeBlock* codeBlock() const { return m_codeBlock; }
1445
1446 private:
1447     mutable int m_iterations;
1448     mutable CodeBlock* m_codeBlock;
1449 };
1450
1451 String Internals::parserMetaData(JSC::JSValue code)
1452 {
1453     JSC::VM& vm = contextDocument()->vm();
1454     JSC::ExecState* exec = vm.topCallFrame;
1455     ScriptExecutable* executable;
1456
1457     if (!code || code.isNull() || code.isUndefined()) {
1458         GetCallerCodeBlockFunctor iter;
1459         exec->iterate(iter);
1460         CodeBlock* codeBlock = iter.codeBlock();
1461         executable = codeBlock->ownerScriptExecutable();
1462     } else if (code.isFunction()) {
1463         JSFunction* funcObj = JSC::jsCast<JSFunction*>(code.toObject(exec));
1464         executable = funcObj->jsExecutable();
1465     } else
1466         return String();
1467
1468     unsigned startLine = executable->firstLine();
1469     unsigned startColumn = executable->startColumn();
1470     unsigned endLine = executable->lastLine();
1471     unsigned endColumn = executable->endColumn();
1472
1473     StringBuilder result;
1474
1475     if (executable->isFunctionExecutable()) {
1476         FunctionExecutable* funcExecutable = reinterpret_cast<FunctionExecutable*>(executable);
1477         String inferredName = funcExecutable->inferredName().string();
1478         result.appendLiteral("function \"");
1479         result.append(inferredName);
1480         result.append('"');
1481     } else if (executable->isEvalExecutable())
1482         result.appendLiteral("eval");
1483     else if (executable->isModuleProgramExecutable())
1484         result.appendLiteral("module");
1485     else if (executable->isProgramExecutable())
1486         result.appendLiteral("program");
1487 #if ENABLE(WEBASSEMBLY)
1488     else if (executable->isWebAssemblyExecutable())
1489         result.appendLiteral("WebAssembly");
1490 #endif
1491     else
1492         ASSERT_NOT_REACHED();
1493
1494     result.appendLiteral(" { ");
1495     result.appendNumber(startLine);
1496     result.append(':');
1497     result.appendNumber(startColumn);
1498     result.appendLiteral(" - ");
1499     result.appendNumber(endLine);
1500     result.append(':');
1501     result.appendNumber(endColumn);
1502     result.appendLiteral(" }");
1503
1504     return result.toString();
1505 }
1506
1507 ExceptionOr<void> Internals::setBatteryStatus(const String& eventType, bool charging, double chargingTime, double dischargingTime, double level)
1508 {
1509     Document* document = contextDocument();
1510     if (!document || !document->page())
1511         return Exception { INVALID_ACCESS_ERR };
1512
1513 #if ENABLE(BATTERY_STATUS)
1514     BatteryController::from(document->page())->didChangeBatteryStatus(eventType, BatteryStatus::create(charging, chargingTime, dischargingTime, level));
1515 #else
1516     UNUSED_PARAM(eventType);
1517     UNUSED_PARAM(charging);
1518     UNUSED_PARAM(chargingTime);
1519     UNUSED_PARAM(dischargingTime);
1520     UNUSED_PARAM(level);
1521 #endif
1522     return { };
1523 }
1524
1525 ExceptionOr<void> Internals::setDeviceProximity(const String&, double value, double min, double max)
1526 {
1527     Document* document = contextDocument();
1528     if (!document || !document->page())
1529         return Exception { INVALID_ACCESS_ERR };
1530
1531 #if ENABLE(PROXIMITY_EVENTS)
1532     DeviceProximityController::from(document->page())->didChangeDeviceProximity(value, min, max);
1533 #else
1534     UNUSED_PARAM(value);
1535     UNUSED_PARAM(min);
1536     UNUSED_PARAM(max);
1537 #endif
1538     return { };
1539 }
1540
1541 void Internals::updateEditorUINowIfScheduled()
1542 {
1543     if (Document* document = contextDocument()) {
1544         if (Frame* frame = document->frame())
1545             frame->editor().updateEditorUINowIfScheduled();
1546     }
1547 }
1548
1549 bool Internals::hasSpellingMarker(int from, int length)
1550 {
1551     Document* document = contextDocument();
1552     if (!document || !document->frame())
1553         return false;
1554
1555     updateEditorUINowIfScheduled();
1556
1557     return document->frame()->editor().selectionStartHasMarkerFor(DocumentMarker::Spelling, from, length);
1558 }
1559
1560 bool Internals::hasAutocorrectedMarker(int from, int length)
1561 {
1562     Document* document = contextDocument();
1563     if (!document || !document->frame())
1564         return false;
1565
1566     updateEditorUINowIfScheduled();
1567
1568     return document->frame()->editor().selectionStartHasMarkerFor(DocumentMarker::Autocorrected, from, length);
1569 }
1570
1571 void Internals::setContinuousSpellCheckingEnabled(bool enabled)
1572 {
1573     if (!contextDocument() || !contextDocument()->frame())
1574         return;
1575
1576     if (enabled != contextDocument()->frame()->editor().isContinuousSpellCheckingEnabled())
1577         contextDocument()->frame()->editor().toggleContinuousSpellChecking();
1578 }
1579
1580 void Internals::setAutomaticQuoteSubstitutionEnabled(bool enabled)
1581 {
1582     if (!contextDocument() || !contextDocument()->frame())
1583         return;
1584
1585 #if USE(AUTOMATIC_TEXT_REPLACEMENT)
1586     if (enabled != contextDocument()->frame()->editor().isAutomaticQuoteSubstitutionEnabled())
1587         contextDocument()->frame()->editor().toggleAutomaticQuoteSubstitution();
1588 #else
1589     UNUSED_PARAM(enabled);
1590 #endif
1591 }
1592
1593 void Internals::setAutomaticLinkDetectionEnabled(bool enabled)
1594 {
1595     if (!contextDocument() || !contextDocument()->frame())
1596         return;
1597
1598 #if USE(AUTOMATIC_TEXT_REPLACEMENT)
1599     if (enabled != contextDocument()->frame()->editor().isAutomaticLinkDetectionEnabled())
1600         contextDocument()->frame()->editor().toggleAutomaticLinkDetection();
1601 #else
1602     UNUSED_PARAM(enabled);
1603 #endif
1604 }
1605
1606 void Internals::setAutomaticDashSubstitutionEnabled(bool enabled)
1607 {
1608     if (!contextDocument() || !contextDocument()->frame())
1609         return;
1610
1611 #if USE(AUTOMATIC_TEXT_REPLACEMENT)
1612     if (enabled != contextDocument()->frame()->editor().isAutomaticDashSubstitutionEnabled())
1613         contextDocument()->frame()->editor().toggleAutomaticDashSubstitution();
1614 #else
1615     UNUSED_PARAM(enabled);
1616 #endif
1617 }
1618
1619 void Internals::setAutomaticTextReplacementEnabled(bool enabled)
1620 {
1621     if (!contextDocument() || !contextDocument()->frame())
1622         return;
1623
1624 #if USE(AUTOMATIC_TEXT_REPLACEMENT)
1625     if (enabled != contextDocument()->frame()->editor().isAutomaticTextReplacementEnabled())
1626         contextDocument()->frame()->editor().toggleAutomaticTextReplacement();
1627 #else
1628     UNUSED_PARAM(enabled);
1629 #endif
1630 }
1631
1632 void Internals::setAutomaticSpellingCorrectionEnabled(bool enabled)
1633 {
1634     if (!contextDocument() || !contextDocument()->frame())
1635         return;
1636
1637 #if USE(AUTOMATIC_TEXT_REPLACEMENT)
1638     if (enabled != contextDocument()->frame()->editor().isAutomaticSpellingCorrectionEnabled())
1639         contextDocument()->frame()->editor().toggleAutomaticSpellingCorrection();
1640 #else
1641     UNUSED_PARAM(enabled);
1642 #endif
1643 }
1644
1645 void Internals::handleAcceptedCandidate(const String& candidate, unsigned location, unsigned length)
1646 {
1647     if (!contextDocument() || !contextDocument()->frame())
1648         return;
1649
1650     TextCheckingResult result;
1651     result.type = TextCheckingTypeNone;
1652     result.location = location;
1653     result.length = length;
1654     result.replacement = candidate;
1655     contextDocument()->frame()->editor().handleAcceptedCandidate(result);
1656 }
1657
1658 bool Internals::isOverwriteModeEnabled()
1659 {
1660     Document* document = contextDocument();
1661     if (!document || !document->frame())
1662         return false;
1663
1664     return document->frame()->editor().isOverwriteModeEnabled();
1665 }
1666
1667 void Internals::toggleOverwriteModeEnabled()
1668 {
1669     Document* document = contextDocument();
1670     if (!document || !document->frame())
1671         return;
1672
1673     document->frame()->editor().toggleOverwriteModeEnabled();
1674 }
1675
1676 unsigned Internals::countMatchesForText(const String& text, unsigned findOptions, const String& markMatches)
1677 {
1678     Document* document = contextDocument();
1679     if (!document || !document->frame())
1680         return 0;
1681
1682     bool mark = markMatches == "mark";
1683     return document->frame()->editor().countMatchesForText(text, nullptr, findOptions, 1000, mark, nullptr);
1684 }
1685
1686 unsigned Internals::countFindMatches(const String& text, unsigned findOptions)
1687 {
1688     Document* document = contextDocument();
1689     if (!document || !document->page())
1690         return 0;
1691
1692     return document->page()->countFindMatches(text, findOptions, 1000);
1693 }
1694
1695 unsigned Internals::numberOfLiveNodes() const
1696 {
1697     unsigned nodeCount = 0;
1698     for (auto* document : Document::allDocuments())
1699         nodeCount += document->referencingNodeCount();
1700     return nodeCount;
1701 }
1702
1703 unsigned Internals::numberOfLiveDocuments() const
1704 {
1705     return Document::allDocuments().size();
1706 }
1707
1708 RefPtr<DOMWindow> Internals::openDummyInspectorFrontend(const String& url)
1709 {
1710     Page* inspectedPage = contextDocument()->frame()->page();
1711     RefPtr<DOMWindow> window = inspectedPage->mainFrame().document()->domWindow();
1712     RefPtr<DOMWindow> frontendWindow = window->open(url, "", "", *window, *window);
1713     m_inspectorFrontend = std::make_unique<InspectorStubFrontend>(*inspectedPage, frontendWindow.copyRef());
1714
1715     return frontendWindow;
1716 }
1717
1718 void Internals::closeDummyInspectorFrontend()
1719 {
1720     m_inspectorFrontend = nullptr;
1721 }
1722
1723 ExceptionOr<void> Internals::setInspectorIsUnderTest(bool isUnderTest)
1724 {
1725     Page* page = contextDocument()->frame()->page();
1726     if (!page)
1727         return Exception { INVALID_ACCESS_ERR };
1728
1729     page->inspectorController().setIsUnderTest(isUnderTest);
1730     return { };
1731 }
1732
1733 bool Internals::hasGrammarMarker(int from, int length)
1734 {
1735     Document* document = contextDocument();
1736     if (!document || !document->frame())
1737         return false;
1738
1739     return document->frame()->editor().selectionStartHasMarkerFor(DocumentMarker::Grammar, from, length);
1740 }
1741
1742 unsigned Internals::numberOfScrollableAreas()
1743 {
1744     Document* document = contextDocument();
1745     if (!document || !document->frame())
1746         return 0;
1747
1748     unsigned count = 0;
1749     Frame* frame = document->frame();
1750     if (frame->view()->scrollableAreas())
1751         count += frame->view()->scrollableAreas()->size();
1752
1753     for (Frame* child = frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
1754         if (child->view() && child->view()->scrollableAreas())
1755             count += child->view()->scrollableAreas()->size();
1756     }
1757
1758     return count;
1759 }
1760
1761 ExceptionOr<bool> Internals::isPageBoxVisible(int pageNumber)
1762 {
1763     Document* document = contextDocument();
1764     if (!document)
1765         return Exception { INVALID_ACCESS_ERR };
1766
1767     return document->isPageBoxVisible(pageNumber);
1768 }
1769
1770 // FIXME: Remove the document argument. It is almost always the same as
1771 // contextDocument(), with the exception of a few tests that pass a
1772 // different document, and could just make the call through another Internals
1773 // instance instead.
1774 ExceptionOr<String> Internals::layerTreeAsText(Document& document, unsigned short flags) const
1775 {
1776     if (!document.frame())
1777         return Exception { INVALID_ACCESS_ERR };
1778
1779     LayerTreeFlags layerTreeFlags = 0;
1780     if (flags & LAYER_TREE_INCLUDES_VISIBLE_RECTS)
1781         layerTreeFlags |= LayerTreeFlagsIncludeVisibleRects;
1782     if (flags & LAYER_TREE_INCLUDES_TILE_CACHES)
1783         layerTreeFlags |= LayerTreeFlagsIncludeTileCaches;
1784     if (flags & LAYER_TREE_INCLUDES_REPAINT_RECTS)
1785         layerTreeFlags |= LayerTreeFlagsIncludeRepaintRects;
1786     if (flags & LAYER_TREE_INCLUDES_PAINTING_PHASES)
1787         layerTreeFlags |= LayerTreeFlagsIncludePaintingPhases;
1788     if (flags & LAYER_TREE_INCLUDES_CONTENT_LAYERS)
1789         layerTreeFlags |= LayerTreeFlagsIncludeContentLayers;
1790
1791     return document.frame()->layerTreeAsText(layerTreeFlags);
1792 }
1793
1794 ExceptionOr<String> Internals::repaintRectsAsText() const
1795 {
1796     Document* document = contextDocument();
1797     if (!document || !document->frame())
1798         return Exception { INVALID_ACCESS_ERR };
1799
1800     return document->frame()->trackedRepaintRectsAsText();
1801 }
1802
1803 ExceptionOr<String> Internals::scrollingStateTreeAsText() const
1804 {
1805     Document* document = contextDocument();
1806     if (!document || !document->frame())
1807         return Exception { INVALID_ACCESS_ERR };
1808
1809     Page* page = document->page();
1810     if (!page)
1811         return String();
1812
1813     return page->scrollingStateTreeAsText();
1814 }
1815
1816 ExceptionOr<String> Internals::mainThreadScrollingReasons() const
1817 {
1818     Document* document = contextDocument();
1819     if (!document || !document->frame())
1820         return Exception { INVALID_ACCESS_ERR };
1821
1822     Page* page = document->page();
1823     if (!page)
1824         return String();
1825
1826     return page->synchronousScrollingReasonsAsText();
1827 }
1828
1829 ExceptionOr<RefPtr<ClientRectList>> Internals::nonFastScrollableRects() const
1830 {
1831     Document* document = contextDocument();
1832     if (!document || !document->frame())
1833         return Exception { INVALID_ACCESS_ERR };
1834
1835     Page* page = document->page();
1836     if (!page)
1837         return nullptr;
1838
1839     return RefPtr<ClientRectList> { page->nonFastScrollableRects() };
1840 }
1841
1842 ExceptionOr<void> Internals::setElementUsesDisplayListDrawing(Element& element, bool usesDisplayListDrawing)
1843 {
1844     Document* document = contextDocument();
1845     if (!document || !document->renderView())
1846         return Exception { INVALID_ACCESS_ERR };
1847
1848     if (!element.renderer())
1849         return Exception { INVALID_ACCESS_ERR };
1850
1851     if (is<HTMLCanvasElement>(element)) {
1852         downcast<HTMLCanvasElement>(element).setUsesDisplayListDrawing(usesDisplayListDrawing);
1853         return { };
1854     }
1855
1856     if (!element.renderer()->hasLayer())
1857         return Exception { INVALID_ACCESS_ERR };
1858
1859     RenderLayer* layer = downcast<RenderLayerModelObject>(element.renderer())->layer();
1860     if (!layer->isComposited())
1861         return Exception { INVALID_ACCESS_ERR };
1862
1863     layer->backing()->setUsesDisplayListDrawing(usesDisplayListDrawing);
1864     return { };
1865 }
1866
1867 ExceptionOr<void> Internals::setElementTracksDisplayListReplay(Element& element, bool isTrackingReplay)
1868 {
1869     Document* document = contextDocument();
1870     if (!document || !document->renderView())
1871         return Exception { INVALID_ACCESS_ERR };
1872
1873     if (!element.renderer())
1874         return Exception { INVALID_ACCESS_ERR };
1875
1876     if (is<HTMLCanvasElement>(element)) {
1877         downcast<HTMLCanvasElement>(element).setTracksDisplayListReplay(isTrackingReplay);
1878         return { };
1879     }
1880
1881     if (!element.renderer()->hasLayer())
1882         return Exception { INVALID_ACCESS_ERR };
1883
1884     RenderLayer* layer = downcast<RenderLayerModelObject>(element.renderer())->layer();
1885     if (!layer->isComposited())
1886         return Exception { INVALID_ACCESS_ERR };
1887
1888     layer->backing()->setIsTrackingDisplayListReplay(isTrackingReplay);
1889     return { };
1890 }
1891
1892 ExceptionOr<String> Internals::displayListForElement(Element& element, unsigned short flags)
1893 {
1894     Document* document = contextDocument();
1895     if (!document || !document->renderView())
1896         return Exception { INVALID_ACCESS_ERR };
1897
1898     if (!element.renderer())
1899         return Exception { INVALID_ACCESS_ERR };
1900
1901     DisplayList::AsTextFlags displayListFlags = 0;
1902     if (flags & DISPLAY_LIST_INCLUDES_PLATFORM_OPERATIONS)
1903         displayListFlags |= DisplayList::AsTextFlag::IncludesPlatformOperations;
1904
1905     if (is<HTMLCanvasElement>(element))
1906         return downcast<HTMLCanvasElement>(element).displayListAsText(displayListFlags);
1907
1908     if (!element.renderer()->hasLayer())
1909         return Exception { INVALID_ACCESS_ERR };
1910
1911     RenderLayer* layer = downcast<RenderLayerModelObject>(element.renderer())->layer();
1912     if (!layer->isComposited())
1913         return Exception { INVALID_ACCESS_ERR };
1914
1915     return layer->backing()->displayListAsText(displayListFlags);
1916 }
1917
1918 ExceptionOr<String> Internals::replayDisplayListForElement(Element& element, unsigned short flags)
1919 {
1920     Document* document = contextDocument();
1921     if (!document || !document->renderView())
1922         return Exception { INVALID_ACCESS_ERR };
1923
1924     if (!element.renderer())
1925         return Exception { INVALID_ACCESS_ERR };
1926
1927     DisplayList::AsTextFlags displayListFlags = 0;
1928     if (flags & DISPLAY_LIST_INCLUDES_PLATFORM_OPERATIONS)
1929         displayListFlags |= DisplayList::AsTextFlag::IncludesPlatformOperations;
1930
1931     if (is<HTMLCanvasElement>(element))
1932         return downcast<HTMLCanvasElement>(element).replayDisplayListAsText(displayListFlags);
1933
1934     if (!element.renderer()->hasLayer())
1935         return Exception { INVALID_ACCESS_ERR };
1936
1937     RenderLayer* layer = downcast<RenderLayerModelObject>(element.renderer())->layer();
1938     if (!layer->isComposited())
1939         return Exception { INVALID_ACCESS_ERR };
1940
1941     return layer->backing()->replayDisplayListAsText(displayListFlags);
1942 }
1943
1944 ExceptionOr<void> Internals::garbageCollectDocumentResources() const
1945 {
1946     Document* document = contextDocument();
1947     if (!document)
1948         return Exception { INVALID_ACCESS_ERR };
1949     document->cachedResourceLoader().garbageCollectDocumentResources();
1950     return { };
1951 }
1952
1953 bool Internals::isUnderMemoryPressure()
1954 {
1955     return MemoryPressureHandler::singleton().isUnderMemoryPressure();
1956 }
1957
1958 void Internals::beginSimulatedMemoryPressure()
1959 {
1960     MemoryPressureHandler::singleton().beginSimulatedMemoryPressure();
1961 }
1962
1963 void Internals::endSimulatedMemoryPressure()
1964 {
1965     MemoryPressureHandler::singleton().endSimulatedMemoryPressure();
1966 }
1967
1968 ExceptionOr<void> Internals::insertAuthorCSS(const String& css) const
1969 {
1970     Document* document = contextDocument();
1971     if (!document)
1972         return Exception { INVALID_ACCESS_ERR };
1973
1974     auto parsedSheet = StyleSheetContents::create(*document);
1975     parsedSheet.get().setIsUserStyleSheet(false);
1976     parsedSheet.get().parseString(css);
1977     document->extensionStyleSheets().addAuthorStyleSheetForTesting(WTFMove(parsedSheet));
1978     return { };
1979 }
1980
1981 ExceptionOr<void> Internals::insertUserCSS(const String& css) const
1982 {
1983     Document* document = contextDocument();
1984     if (!document)
1985         return Exception { INVALID_ACCESS_ERR };
1986
1987     auto parsedSheet = StyleSheetContents::create(*document);
1988     parsedSheet.get().setIsUserStyleSheet(true);
1989     parsedSheet.get().parseString(css);
1990     document->extensionStyleSheets().addUserStyleSheet(WTFMove(parsedSheet));
1991     return { };
1992 }
1993
1994 String Internals::counterValue(Element& element)
1995 {
1996     return counterValueForElement(&element);
1997 }
1998
1999 int Internals::pageNumber(Element& element, float pageWidth, float pageHeight)
2000 {
2001     return PrintContext::pageNumberForElement(&element, { pageWidth, pageHeight });
2002 }
2003
2004 Vector<String> Internals::shortcutIconURLs() const
2005 {
2006     Vector<String> vector;
2007
2008     if (!frame())
2009         return vector;
2010
2011     auto string = frame()->loader().icon().url().string();
2012     if (!string.isNull())
2013         vector.append(string);
2014     return vector;
2015 }
2016
2017 int Internals::numberOfPages(float pageWidth, float pageHeight)
2018 {
2019     if (!frame())
2020         return -1;
2021
2022     return PrintContext::numberOfPages(*frame(), FloatSize(pageWidth, pageHeight));
2023 }
2024
2025 ExceptionOr<String> Internals::pageProperty(const String& propertyName, int pageNumber) const
2026 {
2027     if (!frame())
2028         return Exception { INVALID_ACCESS_ERR };
2029
2030     return PrintContext::pageProperty(frame(), propertyName.utf8().data(), pageNumber);
2031 }
2032
2033 ExceptionOr<String> Internals::pageSizeAndMarginsInPixels(int pageNumber, int width, int height, int marginTop, int marginRight, int marginBottom, int marginLeft) const
2034 {
2035     if (!frame())
2036         return Exception { INVALID_ACCESS_ERR };
2037
2038     return PrintContext::pageSizeAndMarginsInPixels(frame(), pageNumber, width, height, marginTop, marginRight, marginBottom, marginLeft);
2039 }
2040
2041 ExceptionOr<void> Internals::setPageScaleFactor(float scaleFactor, int x, int y)
2042 {
2043     Document* document = contextDocument();
2044     if (!document || !document->page())
2045         return Exception { INVALID_ACCESS_ERR };
2046
2047     document->page()->setPageScaleFactor(scaleFactor, IntPoint(x, y));
2048     return { };
2049 }
2050
2051 ExceptionOr<void> Internals::setPageZoomFactor(float zoomFactor)
2052 {
2053     Document* document = contextDocument();
2054     if (!document || !document->frame())
2055         return Exception { INVALID_ACCESS_ERR };
2056
2057     document->frame()->setPageZoomFactor(zoomFactor);
2058     return { };
2059 }
2060
2061 ExceptionOr<void> Internals::setTextZoomFactor(float zoomFactor)
2062 {
2063     Document* document = contextDocument();
2064     if (!document || !document->frame())
2065         return Exception { INVALID_ACCESS_ERR };
2066
2067     document->frame()->setTextZoomFactor(zoomFactor);
2068     return { };
2069 }
2070
2071 ExceptionOr<void> Internals::setUseFixedLayout(bool useFixedLayout)
2072 {
2073     Document* document = contextDocument();
2074     if (!document || !document->view())
2075         return Exception { INVALID_ACCESS_ERR };
2076
2077     document->view()->setUseFixedLayout(useFixedLayout);
2078     return { };
2079 }
2080
2081 ExceptionOr<void> Internals::setFixedLayoutSize(int width, int height)
2082 {
2083     Document* document = contextDocument();
2084     if (!document || !document->view())
2085         return Exception { INVALID_ACCESS_ERR };
2086
2087     document->view()->setFixedLayoutSize(IntSize(width, height));
2088     return { };
2089 }
2090
2091 ExceptionOr<void> Internals::setViewExposedRect(float x, float y, float width, float height)
2092 {
2093     Document* document = contextDocument();
2094     if (!document || !document->view())
2095         return Exception { INVALID_ACCESS_ERR };
2096
2097     document->view()->setViewExposedRect(FloatRect(x, y, width, height));
2098     return { };
2099 }
2100
2101 void Internals::setHeaderHeight(float height)
2102 {
2103     Document* document = contextDocument();
2104     if (!document || !document->view())
2105         return;
2106
2107     document->view()->setHeaderHeight(height);
2108 }
2109
2110 void Internals::setFooterHeight(float height)
2111 {
2112     Document* document = contextDocument();
2113     if (!document || !document->view())
2114         return;
2115
2116     document->view()->setFooterHeight(height);
2117 }
2118
2119 void Internals::setTopContentInset(float contentInset)
2120 {
2121     Document* document = contextDocument();
2122     if (!document || !document->page())
2123         return;
2124
2125     document->page()->setTopContentInset(contentInset);
2126 }
2127
2128 #if ENABLE(FULLSCREEN_API)
2129
2130 void Internals::webkitWillEnterFullScreenForElement(Element& element)
2131 {
2132     Document* document = contextDocument();
2133     if (!document)
2134         return;
2135     document->webkitWillEnterFullScreenForElement(&element);
2136 }
2137
2138 void Internals::webkitDidEnterFullScreenForElement(Element& element)
2139 {
2140     Document* document = contextDocument();
2141     if (!document)
2142         return;
2143     document->webkitDidEnterFullScreenForElement(&element);
2144 }
2145
2146 void Internals::webkitWillExitFullScreenForElement(Element& element)
2147 {
2148     Document* document = contextDocument();
2149     if (!document)
2150         return;
2151     document->webkitWillExitFullScreenForElement(&element);
2152 }
2153
2154 void Internals::webkitDidExitFullScreenForElement(Element& element)
2155 {
2156     Document* document = contextDocument();
2157     if (!document)
2158         return;
2159     document->webkitDidExitFullScreenForElement(&element);
2160 }
2161
2162 #endif
2163
2164 void Internals::setApplicationCacheOriginQuota(unsigned long long quota)
2165 {
2166     Document* document = contextDocument();
2167     if (!document || !document->page())
2168         return;
2169     document->page()->applicationCacheStorage().storeUpdatedQuotaForOrigin(document->securityOrigin(), quota);
2170 }
2171
2172 void Internals::registerURLSchemeAsBypassingContentSecurityPolicy(const String& scheme)
2173 {
2174     SchemeRegistry::registerURLSchemeAsBypassingContentSecurityPolicy(scheme);
2175 }
2176
2177 void Internals::removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(const String& scheme)
2178 {
2179     SchemeRegistry::removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(scheme);
2180 }
2181
2182 Ref<MallocStatistics> Internals::mallocStatistics() const
2183 {
2184     return MallocStatistics::create();
2185 }
2186
2187 Ref<TypeConversions> Internals::typeConversions() const
2188 {
2189     return TypeConversions::create();
2190 }
2191
2192 Ref<MemoryInfo> Internals::memoryInfo() const
2193 {
2194     return MemoryInfo::create();
2195 }
2196
2197 Vector<String> Internals::getReferencedFilePaths() const
2198 {
2199     frame()->loader().history().saveDocumentAndScrollState();
2200     return FormController::getReferencedFilePaths(frame()->loader().history().currentItem()->documentState());
2201 }
2202
2203 ExceptionOr<void> Internals::startTrackingRepaints()
2204 {
2205     Document* document = contextDocument();
2206     if (!document || !document->view())
2207         return Exception { INVALID_ACCESS_ERR };
2208
2209     document->view()->setTracksRepaints(true);
2210     return { };
2211 }
2212
2213 ExceptionOr<void> Internals::stopTrackingRepaints()
2214 {
2215     Document* document = contextDocument();
2216     if (!document || !document->view())
2217         return Exception { INVALID_ACCESS_ERR };
2218
2219     document->view()->setTracksRepaints(false);
2220     return { };
2221 }
2222
2223 ExceptionOr<void> Internals::startTrackingLayerFlushes()
2224 {
2225     Document* document = contextDocument();
2226     if (!document || !document->renderView())
2227         return Exception { INVALID_ACCESS_ERR };
2228
2229     document->renderView()->compositor().startTrackingLayerFlushes();
2230     return { };
2231 }
2232
2233 ExceptionOr<unsigned> Internals::layerFlushCount()
2234 {
2235     Document* document = contextDocument();
2236     if (!document || !document->renderView())
2237         return Exception { INVALID_ACCESS_ERR };
2238
2239     return document->renderView()->compositor().layerFlushCount();
2240 }
2241
2242 ExceptionOr<void> Internals::startTrackingStyleRecalcs()
2243 {
2244     Document* document = contextDocument();
2245     if (!document)
2246         return Exception { INVALID_ACCESS_ERR };
2247
2248     document->startTrackingStyleRecalcs();
2249     return { };
2250 }
2251
2252 ExceptionOr<unsigned> Internals::styleRecalcCount()
2253 {
2254     Document* document = contextDocument();
2255     if (!document)
2256         return Exception { INVALID_ACCESS_ERR };
2257
2258     return document->styleRecalcCount();
2259 }
2260
2261 unsigned Internals::lastStyleUpdateSize() const
2262 {
2263     Document* document = contextDocument();
2264     if (!document)
2265         return 0;
2266     return document->lastStyleUpdateSizeForTesting();
2267 }
2268
2269 ExceptionOr<void> Internals::startTrackingCompositingUpdates()
2270 {
2271     Document* document = contextDocument();
2272     if (!document || !document->renderView())
2273         return Exception { INVALID_ACCESS_ERR };
2274
2275     document->renderView()->compositor().startTrackingCompositingUpdates();
2276     return { };
2277 }
2278
2279 ExceptionOr<unsigned> Internals::compositingUpdateCount()
2280 {
2281     Document* document = contextDocument();
2282     if (!document || !document->renderView())
2283         return Exception { INVALID_ACCESS_ERR };
2284
2285     return document->renderView()->compositor().compositingUpdateCount();
2286 }
2287
2288 ExceptionOr<void> Internals::updateLayoutIgnorePendingStylesheetsAndRunPostLayoutTasks(Node* node)
2289 {
2290     Document* document;
2291     if (!node)
2292         document = contextDocument();
2293     else if (is<Document>(*node))
2294         document = downcast<Document>(node);
2295     else if (is<HTMLIFrameElement>(*node))
2296         document = downcast<HTMLIFrameElement>(*node).contentDocument();
2297     else
2298         return Exception { TypeError };
2299
2300     document->updateLayoutIgnorePendingStylesheets(Document::RunPostLayoutTasks::Synchronously);
2301     return { };
2302 }
2303
2304 unsigned Internals::layoutCount() const
2305 {
2306     Document* document = contextDocument();
2307     if (!document || !document->view())
2308         return 0;
2309     return document->view()->layoutCount();
2310 }
2311
2312 #if !PLATFORM(IOS)
2313 static const char* cursorTypeToString(Cursor::Type cursorType)
2314 {
2315     switch (cursorType) {
2316     case Cursor::Pointer: return "Pointer";
2317     case Cursor::Cross: return "Cross";
2318     case Cursor::Hand: return "Hand";
2319     case Cursor::IBeam: return "IBeam";
2320     case Cursor::Wait: return "Wait";
2321     case Cursor::Help: return "Help";
2322     case Cursor::EastResize: return "EastResize";
2323     case Cursor::NorthResize: return "NorthResize";
2324     case Cursor::NorthEastResize: return "NorthEastResize";
2325     case Cursor::NorthWestResize: return "NorthWestResize";
2326     case Cursor::SouthResize: return "SouthResize";
2327     case Cursor::SouthEastResize: return "SouthEastResize";
2328     case Cursor::SouthWestResize: return "SouthWestResize";
2329     case Cursor::WestResize: return "WestResize";
2330     case Cursor::NorthSouthResize: return "NorthSouthResize";
2331     case Cursor::EastWestResize: return "EastWestResize";
2332     case Cursor::NorthEastSouthWestResize: return "NorthEastSouthWestResize";
2333     case Cursor::NorthWestSouthEastResize: return "NorthWestSouthEastResize";
2334     case Cursor::ColumnResize: return "ColumnResize";
2335     case Cursor::RowResize: return "RowResize";
2336     case Cursor::MiddlePanning: return "MiddlePanning";
2337     case Cursor::EastPanning: return "EastPanning";
2338     case Cursor::NorthPanning: return "NorthPanning";
2339     case Cursor::NorthEastPanning: return "NorthEastPanning";
2340     case Cursor::NorthWestPanning: return "NorthWestPanning";
2341     case Cursor::SouthPanning: return "SouthPanning";
2342     case Cursor::SouthEastPanning: return "SouthEastPanning";
2343     case Cursor::SouthWestPanning: return "SouthWestPanning";
2344     case Cursor::WestPanning: return "WestPanning";
2345     case Cursor::Move: return "Move";
2346     case Cursor::VerticalText: return "VerticalText";
2347     case Cursor::Cell: return "Cell";
2348     case Cursor::ContextMenu: return "ContextMenu";
2349     case Cursor::Alias: return "Alias";
2350     case Cursor::Progress: return "Progress";
2351     case Cursor::NoDrop: return "NoDrop";
2352     case Cursor::Copy: return "Copy";
2353     case Cursor::None: return "None";
2354     case Cursor::NotAllowed: return "NotAllowed";
2355     case Cursor::ZoomIn: return "ZoomIn";
2356     case Cursor::ZoomOut: return "ZoomOut";
2357     case Cursor::Grab: return "Grab";
2358     case Cursor::Grabbing: return "Grabbing";
2359     case Cursor::Custom: return "Custom";
2360     }
2361
2362     ASSERT_NOT_REACHED();
2363     return "UNKNOWN";
2364 }
2365 #endif
2366
2367 ExceptionOr<String> Internals::getCurrentCursorInfo()
2368 {
2369     Document* document = contextDocument();
2370     if (!document || !document->frame())
2371         return Exception { INVALID_ACCESS_ERR };
2372
2373 #if !PLATFORM(IOS)
2374     Cursor cursor = document->frame()->eventHandler().currentMouseCursor();
2375
2376     StringBuilder result;
2377     result.appendLiteral("type=");
2378     result.append(cursorTypeToString(cursor.type()));
2379     result.appendLiteral(" hotSpot=");
2380     result.appendNumber(cursor.hotSpot().x());
2381     result.append(',');
2382     result.appendNumber(cursor.hotSpot().y());
2383     if (cursor.image()) {
2384         FloatSize size = cursor.image()->size();
2385         result.appendLiteral(" image=");
2386         result.appendNumber(size.width());
2387         result.append('x');
2388         result.appendNumber(size.height());
2389     }
2390 #if ENABLE(MOUSE_CURSOR_SCALE)
2391     if (cursor.imageScaleFactor() != 1) {
2392         result.appendLiteral(" scale=");
2393         NumberToStringBuffer buffer;
2394         result.append(numberToFixedPrecisionString(cursor.imageScaleFactor(), 8, buffer, true));
2395     }
2396 #endif
2397     return result.toString();
2398 #else
2399     return String { "FAIL: Cursor details not available on this platform." };
2400 #endif
2401 }
2402
2403 RefPtr<ArrayBuffer> Internals::serializeObject(PassRefPtr<SerializedScriptValue> value) const
2404 {
2405     auto& bytes = value->data();
2406     return ArrayBuffer::create(bytes.data(), bytes.size());
2407 }
2408
2409 RefPtr<SerializedScriptValue> Internals::deserializeBuffer(ArrayBuffer& buffer) const
2410 {
2411     Vector<uint8_t> bytes;
2412     bytes.append(static_cast<const uint8_t*>(buffer.data()), buffer.byteLength());
2413     return SerializedScriptValue::adopt(WTFMove(bytes));
2414 }
2415
2416 bool Internals::isFromCurrentWorld(JSC::JSValue value) const
2417 {
2418     ASSERT(value);
2419     JSC::ExecState& state = *contextDocument()->vm().topCallFrame;
2420     return !value.isObject() || &worldForDOMObject(asObject(value)) == &currentWorld(&state);
2421 }
2422
2423 void Internals::setUsesOverlayScrollbars(bool enabled)
2424 {
2425     WebCore::Settings::setUsesOverlayScrollbars(enabled);
2426 }
2427
2428 void Internals::setUsesMockScrollAnimator(bool enabled)
2429 {
2430     WebCore::Settings::setUsesMockScrollAnimator(enabled);
2431 }
2432
2433 void Internals::forceReload(bool endToEnd)
2434 {
2435     frame()->loader().reload(endToEnd);
2436 }
2437
2438 void Internals::enableAutoSizeMode(bool enabled, int minimumWidth, int minimumHeight, int maximumWidth, int maximumHeight)
2439 {
2440     Document* document = contextDocument();
2441     if (!document || !document->view())
2442         return;
2443     document->view()->enableAutoSizeMode(enabled, IntSize(minimumWidth, minimumHeight), IntSize(maximumWidth, maximumHeight));
2444 }
2445
2446 #if ENABLE(LEGACY_ENCRYPTED_MEDIA)
2447 void Internals::initializeMockCDM()
2448 {
2449     CDM::registerCDMFactory([](CDM* cdm) { return std::make_unique<MockCDM>(cdm); },
2450         MockCDM::supportsKeySystem, MockCDM::supportsKeySystemAndMimeType);
2451 }
2452 #endif
2453
2454 String Internals::markerTextForListItem(Element& element)
2455 {
2456     return WebCore::markerTextForListItem(&element);
2457 }
2458
2459 String Internals::toolTipFromElement(Element& element) const
2460 {
2461     HitTestResult result;
2462     result.setInnerNode(&element);
2463     TextDirection direction;
2464     return result.title(direction);
2465 }
2466
2467 String Internals::getImageSourceURL(Element& element)
2468 {
2469     return element.imageSourceURL();
2470 }
2471
2472 #if ENABLE(VIDEO)
2473
2474 void Internals::simulateAudioInterruption(HTMLMediaElement& element)
2475 {
2476 #if USE(GSTREAMER)
2477     element.player()->simulateAudioInterruption();
2478 #else
2479     UNUSED_PARAM(element);
2480 #endif
2481 }
2482
2483 ExceptionOr<bool> Internals::mediaElementHasCharacteristic(HTMLMediaElement& element, const String& characteristic)
2484 {
2485     if (equalLettersIgnoringASCIICase(characteristic, "audible"))
2486         return element.hasAudio();
2487     if (equalLettersIgnoringASCIICase(characteristic, "visual"))
2488         return element.hasVideo();
2489     if (equalLettersIgnoringASCIICase(characteristic, "legible"))
2490         return element.hasClosedCaptions();
2491
2492     return Exception { SYNTAX_ERR };
2493 }
2494
2495 #endif
2496
2497 bool Internals::isSelectPopupVisible(HTMLSelectElement& element)
2498 {
2499     auto* renderer = element.renderer();
2500     ASSERT(renderer);
2501     if (!is<RenderMenuList>(*renderer))
2502         return false;
2503
2504 #if !PLATFORM(IOS)
2505     return downcast<RenderMenuList>(*renderer).popupIsVisible();
2506 #else
2507     return false;
2508 #endif
2509 }
2510
2511 ExceptionOr<String> Internals::captionsStyleSheetOverride()
2512 {
2513     Document* document = contextDocument();
2514     if (!document || !document->page())
2515         return Exception { INVALID_ACCESS_ERR };
2516
2517 #if ENABLE(VIDEO_TRACK)
2518     return document->page()->group().captionPreferences().captionsStyleSheetOverride();
2519 #else
2520     return emptyString();
2521 #endif
2522 }
2523
2524 ExceptionOr<void> Internals::setCaptionsStyleSheetOverride(const String& override)
2525 {
2526     Document* document = contextDocument();
2527     if (!document || !document->page())
2528         return Exception { INVALID_ACCESS_ERR };
2529
2530 #if ENABLE(VIDEO_TRACK)
2531     document->page()->group().captionPreferences().setCaptionsStyleSheetOverride(override);
2532 #else
2533     UNUSED_PARAM(override);
2534 #endif
2535     return { };
2536 }
2537
2538 ExceptionOr<void> Internals::setPrimaryAudioTrackLanguageOverride(const String& language)
2539 {
2540     Document* document = contextDocument();
2541     if (!document || !document->page())
2542         return Exception { INVALID_ACCESS_ERR };
2543
2544 #if ENABLE(VIDEO_TRACK)
2545     document->page()->group().captionPreferences().setPrimaryAudioTrackLanguageOverride(language);
2546 #else
2547     UNUSED_PARAM(language);
2548 #endif
2549     return { };
2550 }
2551
2552 ExceptionOr<void> Internals::setCaptionDisplayMode(const String& mode)
2553 {
2554     Document* document = contextDocument();
2555     if (!document || !document->page())
2556         return Exception { INVALID_ACCESS_ERR };
2557
2558 #if ENABLE(VIDEO_TRACK)
2559     auto& captionPreferences = document->page()->group().captionPreferences();
2560
2561     if (equalLettersIgnoringASCIICase(mode, "automatic"))
2562         captionPreferences.setCaptionDisplayMode(CaptionUserPreferences::Automatic);
2563     else if (equalLettersIgnoringASCIICase(mode, "forcedonly"))
2564         captionPreferences.setCaptionDisplayMode(CaptionUserPreferences::ForcedOnly);
2565     else if (equalLettersIgnoringASCIICase(mode, "alwayson"))
2566         captionPreferences.setCaptionDisplayMode(CaptionUserPreferences::AlwaysOn);
2567     else if (equalLettersIgnoringASCIICase(mode, "manual"))
2568         captionPreferences.setCaptionDisplayMode(CaptionUserPreferences::Manual);
2569     else
2570         return Exception { SYNTAX_ERR };
2571 #else
2572     UNUSED_PARAM(mode);
2573 #endif
2574     return { };
2575 }
2576
2577 #if ENABLE(VIDEO)
2578
2579 Ref<TimeRanges> Internals::createTimeRanges(Float32Array& startTimes, Float32Array& endTimes)
2580 {
2581     ASSERT(startTimes.length() == endTimes.length());
2582     Ref<TimeRanges> ranges = TimeRanges::create();
2583
2584     unsigned count = std::min(startTimes.length(), endTimes.length());
2585     for (unsigned i = 0; i < count; ++i)
2586         ranges->add(startTimes.item(i), endTimes.item(i));
2587     return ranges;
2588 }
2589
2590 double Internals::closestTimeToTimeRanges(double time, TimeRanges& ranges)
2591 {
2592     return ranges.nearest(time);
2593 }
2594
2595 #endif
2596
2597 ExceptionOr<Ref<ClientRect>> Internals::selectionBounds()
2598 {
2599     Document* document = contextDocument();
2600     if (!document || !document->frame())
2601         return Exception { INVALID_ACCESS_ERR };
2602
2603     return ClientRect::create(document->frame()->selection().selectionBounds());
2604 }
2605
2606 #if ENABLE(VIBRATION)
2607
2608 bool Internals::isVibrating()
2609 {
2610     auto* document = contextDocument();
2611     auto* page = document ? document->page() : nullptr;
2612     return page && Vibration::from(page)->isVibrating();
2613 }
2614
2615 #endif
2616
2617 ExceptionOr<bool> Internals::isPluginUnavailabilityIndicatorObscured(Element& element)
2618 {
2619     auto* renderer = element.renderer();
2620     if (!is<RenderEmbeddedObject>(renderer))
2621         return Exception { INVALID_ACCESS_ERR };
2622
2623     return downcast<RenderEmbeddedObject>(*renderer).isReplacementObscured();
2624 }
2625
2626 bool Internals::isPluginSnapshotted(Element& element)
2627 {
2628     return is<HTMLPlugInElement>(element) && downcast<HTMLPlugInElement>(element).displayState() <= HTMLPlugInElement::DisplayingSnapshot;
2629 }
2630
2631 #if ENABLE(MEDIA_SOURCE)
2632
2633 void Internals::initializeMockMediaSource()
2634 {
2635 #if USE(AVFOUNDATION)
2636     WebCore::Settings::setAVFoundationEnabled(false);
2637 #endif
2638     MediaPlayerFactorySupport::callRegisterMediaEngine(MockMediaPlayerMediaSource::registerMediaEngine);
2639 }
2640
2641 Vector<String> Internals::bufferedSamplesForTrackID(SourceBuffer& buffer, const AtomicString& trackID)
2642 {
2643     return buffer.bufferedSamplesForTrackID(trackID);
2644 }
2645
2646 Vector<String> Internals::enqueuedSamplesForTrackID(SourceBuffer& buffer, const AtomicString& trackID)
2647 {
2648     return buffer.enqueuedSamplesForTrackID(trackID);
2649 }
2650
2651 void Internals::setShouldGenerateTimestamps(SourceBuffer& buffer, bool flag)
2652 {
2653     buffer.setShouldGenerateTimestamps(flag);
2654 }
2655
2656 #endif
2657
2658 #if ENABLE(VIDEO)
2659
2660 ExceptionOr<void> Internals::beginMediaSessionInterruption(const String& interruptionString)
2661 {
2662     PlatformMediaSession::InterruptionType interruption = PlatformMediaSession::SystemInterruption;
2663
2664     if (equalLettersIgnoringASCIICase(interruptionString, "system"))
2665         interruption = PlatformMediaSession::SystemInterruption;
2666     else if (equalLettersIgnoringASCIICase(interruptionString, "systemsleep"))
2667         interruption = PlatformMediaSession::SystemSleep;
2668     else if (equalLettersIgnoringASCIICase(interruptionString, "enteringbackground"))
2669         interruption = PlatformMediaSession::EnteringBackground;
2670     else if (equalLettersIgnoringASCIICase(interruptionString, "suspendedunderlock"))
2671         interruption = PlatformMediaSession::SuspendedUnderLock;
2672     else
2673         return Exception { INVALID_ACCESS_ERR };
2674
2675     PlatformMediaSessionManager::sharedManager().beginInterruption(interruption);
2676     return { };
2677 }
2678
2679 void Internals::endMediaSessionInterruption(const String& flagsString)
2680 {
2681     PlatformMediaSession::EndInterruptionFlags flags = PlatformMediaSession::NoFlags;
2682
2683     if (equalLettersIgnoringASCIICase(flagsString, "mayresumeplaying"))
2684         flags = PlatformMediaSession::MayResumePlaying;
2685
2686     PlatformMediaSessionManager::sharedManager().endInterruption(flags);
2687 }
2688
2689 void Internals::applicationDidEnterForeground() const
2690 {
2691     PlatformMediaSessionManager::sharedManager().applicationDidEnterForeground();
2692 }
2693
2694 void Internals::applicationWillEnterBackground() const
2695 {
2696     PlatformMediaSessionManager::sharedManager().applicationWillEnterBackground();
2697 }
2698
2699 ExceptionOr<void> Internals::setMediaSessionRestrictions(const String& mediaTypeString, const String& restrictionsString)
2700 {
2701     PlatformMediaSession::MediaType mediaType = PlatformMediaSession::None;
2702     if (equalLettersIgnoringASCIICase(mediaTypeString, "video"))
2703         mediaType = PlatformMediaSession::Video;
2704     else if (equalLettersIgnoringASCIICase(mediaTypeString, "audio"))
2705         mediaType = PlatformMediaSession::Audio;
2706     else if (equalLettersIgnoringASCIICase(mediaTypeString, "webaudio"))
2707         mediaType = PlatformMediaSession::WebAudio;
2708     else
2709         return Exception { INVALID_ACCESS_ERR };
2710
2711     PlatformMediaSessionManager::SessionRestrictions restrictions = PlatformMediaSessionManager::sharedManager().restrictions(mediaType);
2712     PlatformMediaSessionManager::sharedManager().removeRestriction(mediaType, restrictions);
2713
2714     restrictions = PlatformMediaSessionManager::NoRestrictions;
2715
2716     Vector<String> restrictionsArray;
2717     restrictionsString.split(',', false, restrictionsArray);
2718     for (auto& restrictionString : restrictionsArray) {
2719         if (equalLettersIgnoringASCIICase(restrictionString, "concurrentplaybacknotpermitted"))
2720             restrictions |= PlatformMediaSessionManager::ConcurrentPlaybackNotPermitted;
2721         if (equalLettersIgnoringASCIICase(restrictionString, "backgroundprocessplaybackrestricted"))
2722             restrictions |= PlatformMediaSessionManager::BackgroundProcessPlaybackRestricted;
2723         if (equalLettersIgnoringASCIICase(restrictionString, "backgroundtabplaybackrestricted"))
2724             restrictions |= PlatformMediaSessionManager::BackgroundTabPlaybackRestricted;
2725         if (equalLettersIgnoringASCIICase(restrictionString, "interruptedplaybacknotpermitted"))
2726             restrictions |= PlatformMediaSessionManager::InterruptedPlaybackNotPermitted;
2727     }
2728     PlatformMediaSessionManager::sharedManager().addRestriction(mediaType, restrictions);
2729     return { };
2730 }
2731
2732 void Internals::setMediaElementRestrictions(HTMLMediaElement& element, const String& restrictionsString)
2733 {
2734     MediaElementSession::BehaviorRestrictions restrictions = element.mediaSession().behaviorRestrictions();
2735     element.mediaSession().removeBehaviorRestriction(restrictions);
2736
2737     restrictions = MediaElementSession::NoRestrictions;
2738
2739     Vector<String> restrictionsArray;
2740     restrictionsString.split(',', false, restrictionsArray);
2741     for (auto& restrictionString : restrictionsArray) {
2742         if (equalLettersIgnoringASCIICase(restrictionString, "norestrictions"))
2743             restrictions |= MediaElementSession::NoRestrictions;
2744         if (equalLettersIgnoringASCIICase(restrictionString, "requireusergestureforload"))
2745             restrictions |= MediaElementSession::RequireUserGestureForLoad;
2746         if (equalLettersIgnoringASCIICase(restrictionString, "requireusergestureforvideoratechange"))
2747             restrictions |= MediaElementSession::RequireUserGestureForVideoRateChange;
2748         if (equalLettersIgnoringASCIICase(restrictionString, "requireusergestureforfullscreen"))
2749             restrictions |= MediaElementSession::RequireUserGestureForFullscreen;
2750         if (equalLettersIgnoringASCIICase(restrictionString, "requirepageconsenttoloadmedia"))
2751             restrictions |= MediaElementSession::RequirePageConsentToLoadMedia;
2752         if (equalLettersIgnoringASCIICase(restrictionString, "requirepageconsenttoresumemedia"))
2753             restrictions |= MediaElementSession::RequirePageConsentToResumeMedia;
2754 #if ENABLE(WIRELESS_PLAYBACK_TARGET)
2755         if (equalLettersIgnoringASCIICase(restrictionString, "requireusergesturetoshowplaybacktargetpicker"))
2756             restrictions |= MediaElementSession::RequireUserGestureToShowPlaybackTargetPicker;
2757         if (equalLettersIgnoringASCIICase(restrictionString, "wirelessvideoplaybackdisabled"))
2758             restrictions |= MediaElementSession::WirelessVideoPlaybackDisabled;
2759 #endif
2760         if (equalLettersIgnoringASCIICase(restrictionString, "requireusergestureforaudioratechange"))
2761             restrictions |= MediaElementSession::RequireUserGestureForAudioRateChange;
2762         if (equalLettersIgnoringASCIICase(restrictionString, "metadatapreloadingnotpermitted"))
2763             restrictions |= MediaElementSession::MetadataPreloadingNotPermitted;
2764         if (equalLettersIgnoringASCIICase(restrictionString, "autopreloadingnotpermitted"))
2765             restrictions |= MediaElementSession::AutoPreloadingNotPermitted;
2766         if (equalLettersIgnoringASCIICase(restrictionString, "invisibleautoplaynotpermitted"))
2767             restrictions |= MediaElementSession::InvisibleAutoplayNotPermitted;
2768         if (equalLettersIgnoringASCIICase(restrictionString, "overrideusergesturerequirementformaincontent"))
2769             restrictions |= MediaElementSession::OverrideUserGestureRequirementForMainContent;
2770     }
2771     element.mediaSession().addBehaviorRestriction(restrictions);
2772 }
2773
2774 ExceptionOr<void> Internals::postRemoteControlCommand(const String& commandString, float argument)
2775 {
2776     PlatformMediaSession::RemoteControlCommandType command;
2777     PlatformMediaSession::RemoteCommandArgument parameter { argument };
2778
2779     if (equalLettersIgnoringASCIICase(commandString, "play"))
2780         command = PlatformMediaSession::PlayCommand;
2781     else if (equalLettersIgnoringASCIICase(commandString, "pause"))
2782         command = PlatformMediaSession::PauseCommand;
2783     else if (equalLettersIgnoringASCIICase(commandString, "stop"))
2784         command = PlatformMediaSession::StopCommand;
2785     else if (equalLettersIgnoringASCIICase(commandString, "toggleplaypause"))
2786         command = PlatformMediaSession::TogglePlayPauseCommand;
2787     else if (equalLettersIgnoringASCIICase(commandString, "beginseekingbackward"))
2788         command = PlatformMediaSession::BeginSeekingBackwardCommand;
2789     else if (equalLettersIgnoringASCIICase(commandString, "endseekingbackward"))
2790         command = PlatformMediaSession::EndSeekingBackwardCommand;
2791     else if (equalLettersIgnoringASCIICase(commandString, "beginseekingforward"))
2792         command = PlatformMediaSession::BeginSeekingForwardCommand;
2793     else if (equalLettersIgnoringASCIICase(commandString, "endseekingforward"))
2794         command = PlatformMediaSession::EndSeekingForwardCommand;
2795     else if (equalLettersIgnoringASCIICase(commandString, "seektoplaybackposition"))
2796         command = PlatformMediaSession::SeekToPlaybackPositionCommand;
2797     else
2798         return Exception { INVALID_ACCESS_ERR };
2799
2800     PlatformMediaSessionManager::sharedManager().didReceiveRemoteControlCommand(command, &parameter);
2801     return { };
2802 }
2803
2804 bool Internals::elementIsBlockingDisplaySleep(HTMLMediaElement& element) const
2805 {
2806     return element.isDisablingSleep();
2807 }
2808
2809 #endif // ENABLE(VIDEO)
2810
2811 #if ENABLE(MEDIA_SESSION)
2812
2813 void Internals::sendMediaSessionStartOfInterruptionNotification(MediaSessionInterruptingCategory category)
2814 {
2815     MediaSessionManager::singleton().didReceiveStartOfInterruptionNotification(category);
2816 }
2817
2818 void Internals::sendMediaSessionEndOfInterruptionNotification(MediaSessionInterruptingCategory category)
2819 {
2820     MediaSessionManager::singleton().didReceiveEndOfInterruptionNotification(category);
2821 }
2822
2823 String Internals::mediaSessionCurrentState(MediaSession* session) const
2824 {
2825     switch (session->currentState()) {
2826     case MediaSession::State::Active:
2827         return "active";
2828     case MediaSession::State::Interrupted:
2829         return "interrupted";
2830     case MediaSession::State::Idle:
2831         return "idle";
2832     }
2833 }
2834
2835 double Internals::mediaElementPlayerVolume(HTMLMediaElement* element) const
2836 {
2837     ASSERT_ARG(element, element);
2838     return element->playerVolume();
2839 }
2840
2841 void Internals::sendMediaControlEvent(MediaControlEvent event)
2842 {
2843     // FIXME: No good reason to use a single function with an argument instead of three functions.
2844     switch (event) {
2845     case MediControlEvent::PlayPause:
2846         MediaSessionManager::singleton().togglePlayback();
2847         break;
2848     case MediControlEvent::NextTrack:
2849         MediaSessionManager::singleton().skipToNextTrack();
2850         break;
2851     case MediControlEvent::PreviousTrack:
2852         MediaSessionManager::singleton().skipToPreviousTrack();
2853         break;
2854     }
2855 }
2856
2857 #endif // ENABLE(MEDIA_SESSION)
2858
2859 #if ENABLE(WEB_AUDIO)
2860
2861 void Internals::setAudioContextRestrictions(AudioContext& context, const String& restrictionsString)
2862 {
2863     AudioContext::BehaviorRestrictions restrictions = context.behaviorRestrictions();
2864     context.removeBehaviorRestriction(restrictions);
2865
2866     restrictions = AudioContext::NoRestrictions;
2867
2868     Vector<String> restrictionsArray;
2869     restrictionsString.split(',', false, restrictionsArray);
2870     for (auto& restrictionString : restrictionsArray) {
2871         if (equalLettersIgnoringASCIICase(restrictionString, "norestrictions"))
2872             restrictions |= AudioContext::NoRestrictions;
2873         if (equalLettersIgnoringASCIICase(restrictionString, "requireusergestureforaudiostart"))
2874             restrictions |= AudioContext::RequireUserGestureForAudioStartRestriction;
2875         if (equalLettersIgnoringASCIICase(restrictionString, "requirepageconsentforaudiostart"))
2876             restrictions |= AudioContext::RequirePageConsentForAudioStartRestriction;
2877     }
2878     context.addBehaviorRestriction(restrictions);
2879 }
2880
2881 #endif
2882
2883 void Internals::simulateSystemSleep() const
2884 {
2885 #if ENABLE(VIDEO)
2886     PlatformMediaSessionManager::sharedManager().systemWillSleep();
2887 #endif
2888 }
2889
2890 void Internals::simulateSystemWake() const
2891 {
2892 #if ENABLE(VIDEO)
2893     PlatformMediaSessionManager::sharedManager().systemDidWake();
2894 #endif
2895 }
2896
2897 #if ENABLE(WIRELESS_PLAYBACK_TARGET)
2898
2899 void Internals::setMockMediaPlaybackTargetPickerEnabled(bool enabled)
2900 {
2901     Page* page = contextDocument()->frame()->page();
2902     ASSERT(page);
2903
2904     page->setMockMediaPlaybackTargetPickerEnabled(enabled);
2905 }
2906
2907 ExceptionOr<void> Internals::setMockMediaPlaybackTargetPickerState(const String& deviceName, const String& deviceState)
2908 {
2909     Page* page = contextDocument()->frame()->page();
2910     ASSERT(page);
2911
2912     MediaPlaybackTargetContext::State state = MediaPlaybackTargetContext::Unknown;
2913
2914     if (equalLettersIgnoringASCIICase(deviceState, "deviceavailable"))
2915         state = MediaPlaybackTargetContext::OutputDeviceAvailable;
2916     else if (equalLettersIgnoringASCIICase(deviceState, "deviceunavailable"))
2917         state = MediaPlaybackTargetContext::OutputDeviceUnavailable;
2918     else if (equalLettersIgnoringASCIICase(deviceState, "unknown"))
2919         state = MediaPlaybackTargetContext::Unknown;
2920     else
2921         return Exception { INVALID_ACCESS_ERR };
2922
2923     page->setMockMediaPlaybackTargetPickerState(deviceName, state);
2924     return { };
2925 }
2926
2927 #endif
2928
2929 ExceptionOr<Ref<MockPageOverlay>> Internals::installMockPageOverlay(PageOverlayType type)
2930 {
2931     Document* document = contextDocument();
2932     if (!document || !document->frame())
2933         return Exception { INVALID_ACCESS_ERR };
2934
2935     return MockPageOverlayClient::singleton().installOverlay(document->frame()->mainFrame(), type == PageOverlayType::View ? PageOverlay::OverlayType::View : PageOverlay::OverlayType::Document);
2936 }
2937
2938 ExceptionOr<String> Internals::pageOverlayLayerTreeAsText() const
2939 {
2940     Document* document = contextDocument();
2941     if (!document || !document->frame())
2942         return Exception { INVALID_ACCESS_ERR };
2943
2944     document->updateLayout();
2945
2946     return MockPageOverlayClient::singleton().layerTreeAsText(document->frame()->mainFrame());
2947 }
2948
2949 void Internals::setPageMuted(const String& states)
2950 {
2951     Document* document = contextDocument();
2952     if (!document)
2953         return;
2954
2955     WebCore::MediaProducer::MutedStateFlags state = MediaProducer::NoneMuted;
2956     Vector<String> stateString;
2957     states.split(',', false, stateString);
2958     for (auto& muteString : stateString) {
2959         if (equalLettersIgnoringASCIICase(muteString, "audio"))
2960             state |= MediaProducer::AudioIsMuted;
2961         if (equalLettersIgnoringASCIICase(muteString, "capturedevices"))
2962             state |= MediaProducer::CaptureDevicesAreMuted;
2963     }
2964
2965     if (Page* page = document->page())
2966         page->setMuted(state);
2967 }
2968
2969 String Internals::pageMediaState()
2970 {
2971     Document* document = contextDocument();
2972     if (!document || !document->page())
2973         return emptyString();
2974
2975     WebCore::MediaProducer::MediaStateFlags state = document->page()->mediaState();
2976     StringBuilder string;
2977     if (state & MediaProducer::IsPlayingAudio)
2978         string.append("IsPlayingAudio,");
2979     if (state & MediaProducer::IsPlayingVideo)
2980         string.append("IsPlayingVideo,");
2981     if (state & MediaProducer::IsPlayingToExternalDevice)
2982         string.append("IsPlayingToExternalDevice,");
2983     if (state & MediaProducer::RequiresPlaybackTargetMonitoring)
2984         string.append("RequiresPlaybackTargetMonitoring,");
2985     if (state & MediaProducer::ExternalDeviceAutoPlayCandidate)
2986         string.append("ExternalDeviceAutoPlayCandidate,");
2987     if (state & MediaProducer::DidPlayToEnd)
2988         string.append("DidPlayToEnd,");
2989     if (state & MediaProducer::IsSourceElementPlaying)
2990         string.append("IsSourceElementPlaying,");
2991
2992     if (state & MediaProducer::IsNextTrackControlEnabled)
2993         string.append("IsNextTrackControlEnabled,");
2994     if (state & MediaProducer::IsPreviousTrackControlEnabled)
2995         string.append("IsPreviousTrackControlEnabled,");
2996
2997     if (state & MediaProducer::HasPlaybackTargetAvailabilityListener)
2998         string.append("HasPlaybackTargetAvailabilityListener,");
2999     if (state & MediaProducer::HasAudioOrVideo)
3000         string.append("HasAudioOrVideo,");
3001     if (state & MediaProducer::HasActiveMediaCaptureDevice)
3002         string.append("HasActiveMediaCaptureDevice,");
3003     if (state & MediaProducer::HasMediaCaptureDevice)
3004         string.append("HasMediaCaptureDevice,");
3005
3006     if (string.isEmpty())
3007         string.append("IsNotPlaying");
3008     else
3009         string.resize(string.length() - 1);
3010
3011     return string.toString();
3012 }
3013
3014 void Internals::setPageDefersLoading(bool defersLoading)
3015 {
3016     Document* document = contextDocument();
3017     if (!document)
3018         return;
3019     if (Page* page = document->page())
3020         page->setDefersLoading(defersLoading);
3021 }
3022
3023 RefPtr<File> Internals::createFile(const String& path)
3024 {
3025     Document* document = contextDocument();
3026     if (!document)
3027         return nullptr;
3028
3029     URL url = document->completeURL(path);
3030     if (!url.isLocalFile())
3031         return nullptr;
3032
3033     return File::create(url.fileSystemPath());
3034 }
3035
3036 void Internals::queueMicroTask(int testNumber)
3037 {
3038     Document* document = contextDocument();
3039     if (!document)
3040         return;
3041
3042     auto microtask = std::make_unique<ActiveDOMCallbackMicrotask>(MicrotaskQueue::mainThreadQueue(), *document, [document, testNumber]() {
3043         document->addConsoleMessage(MessageSource::JS, MessageLevel::Debug, makeString("MicroTask #", String::number(testNumber), " has run."));
3044     });
3045
3046     MicrotaskQueue::mainThreadQueue().append(WTFMove(microtask));
3047 }
3048
3049 #if ENABLE(CONTENT_FILTERING)
3050
3051 MockContentFilterSettings& Internals::mockContentFilterSettings()
3052 {
3053     return MockContentFilterSettings::singleton();
3054 }
3055
3056 #endif
3057
3058 #if ENABLE(CSS_SCROLL_SNAP)
3059
3060 static void appendOffsets(StringBuilder& builder, const Vector<LayoutUnit>& snapOffsets)
3061 {
3062     bool justStarting = true;
3063
3064     builder.appendLiteral("{ ");
3065     for (auto& coordinate : snapOffsets) {
3066         if (!justStarting)
3067             builder.appendLiteral(", ");
3068         else
3069             justStarting = false;
3070
3071         builder.append(String::number(coordinate.toUnsigned()));
3072     }
3073     builder.appendLiteral(" }");
3074 }
3075
3076 ExceptionOr<String> Internals::scrollSnapOffsets(Element& element)
3077 {
3078     if (!element.renderBox())
3079         return String();
3080
3081     RenderBox& box = *element.renderBox();
3082     ScrollableArea* scrollableArea;
3083
3084     if (box.isBody()) {
3085         FrameView* frameView = box.frame().mainFrame().view();
3086         if (!frameView || !frameView->isScrollable())
3087             return Exception { INVALID_ACCESS_ERR };
3088         scrollableArea = frameView;
3089
3090     } else {
3091         if (!box.canBeScrolledAndHasScrollableArea())
3092             return Exception { INVALID_ACCESS_ERR };
3093         scrollableArea = box.layer();
3094     }
3095
3096     if (!scrollableArea)
3097         return String();
3098
3099     StringBuilder result;
3100
3101     if (scrollableArea->horizontalSnapOffsets()) {
3102         result.appendLiteral("horizontal = ");
3103         appendOffsets(result, *scrollableArea->horizontalSnapOffsets());
3104     }
3105
3106     if (scrollableArea->verticalSnapOffsets()) {
3107         if (result.length())
3108             result.appendLiteral(", ");
3109
3110         result.appendLiteral("vertical = ");
3111         appendOffsets(result, *scrollableArea->verticalSnapOffsets());
3112     }
3113
3114     return result.toString();
3115 }
3116
3117 #endif
3118
3119 bool Internals::testPreloaderSettingViewport()
3120 {
3121     return testPreloadScannerViewportSupport(contextDocument());
3122 }
3123
3124 ExceptionOr<String> Internals::pathStringWithShrinkWrappedRects(const Vector<double>& rectComponents, double radius)
3125 {
3126     if (rectComponents.size() % 4)
3127         return Exception { INVALID_ACCESS_ERR };
3128
3129     Vector<FloatRect> rects;
3130     for (unsigned i = 0; i < rectComponents.size(); i += 4)
3131         rects.append(FloatRect(rectComponents[i], rectComponents[i + 1], rectComponents[i + 2], rectComponents[i + 3]));
3132
3133     SVGPathStringBuilder builder;
3134     PathUtilities::pathWithShrinkWrappedRects(rects, radius).apply([&builder](const PathElement& element) {
3135         switch (element.type) {
3136         case PathElementMoveToPoint:
3137             builder.moveTo(element.points[0], false, AbsoluteCoordinates);
3138             return;
3139         case PathElementAddLineToPoint:
3140             builder.lineTo(element.points[0], AbsoluteCoordinates);
3141             return;
3142         case PathElementAddQuadCurveToPoint:
3143             builder.curveToQuadratic(element.points[0], element.points[1], AbsoluteCoordinates);
3144             return;
3145         case PathElementAddCurveToPoint:
3146             builder.curveToCubic(element.points[0], element.points[1], element.points[2], AbsoluteCoordinates);
3147             return;
3148         case PathElementCloseSubpath:
3149             builder.closePath();
3150             return;
3151         }
3152         ASSERT_NOT_REACHED();
3153     });
3154     return builder.result();
3155 }
3156
3157
3158 String Internals::getCurrentMediaControlsStatusForElement(HTMLMediaElement& mediaElement)
3159 {
3160 #if !ENABLE(MEDIA_CONTROLS_SCRIPT)
3161     UNUSED_PARAM(mediaElement);
3162     return String();
3163 #else
3164     return mediaElement.getCurrentMediaControlsStatus();
3165 #endif
3166 }
3167
3168 #if !PLATFORM(COCOA)
3169
3170 String Internals::userVisibleString(const DOMURL&)
3171 {
3172     // Cocoa-specific function. Could ASSERT_NOT_REACHED, but that's probably overkill.
3173     return String();
3174 }
3175
3176 #endif
3177
3178 void Internals::setShowAllPlugins(bool show)
3179 {
3180     Document* document = contextDocument();
3181     if (!document)
3182         return;
3183
3184     Page* page = document->page();
3185     if (!page)
3186         return;
3187
3188     page->setShowAllPlugins(show);
3189 }
3190
3191 #if ENABLE(READABLE_STREAM_API)
3192
3193 bool Internals::isReadableStreamDisturbed(JSC::ExecState& state, JSValue stream)
3194 {
3195     JSGlobalObject* globalObject = state.vmEntryGlobalObject();
3196     JSVMClientData* clientData = static_cast<JSVMClientData*>(state.vm().clientData);
3197     const Identifier& privateName = clientData->builtinFunctions().readableStreamInternalsBuiltins().isReadableStreamDisturbedPrivateName();
3198     JSValue value;
3199     PropertySlot propertySlot(value, PropertySlot::InternalMethodType::Get);
3200     globalObject->methodTable()->getOwnPropertySlot(globalObject, &state, privateName, propertySlot);
3201     value = propertySlot.getValue(&state, privateName);
3202     ASSERT(value.isFunction());
3203
3204     JSObject* function = value.getObject();
3205     CallData callData;
3206     CallType callType = JSC::getCallData(function, callData);
3207     ASSERT(callType != JSC::CallType::None);
3208     MarkedArgumentBuffer arguments;
3209     arguments.append(stream);
3210     JSValue returnedValue = JSC::call(&state, function, callType, callData, JSC::jsUndefined(), arguments);
3211     ASSERT(returnedValue.isBoolean());
3212
3213     return returnedValue.asBoolean();
3214 }
3215
3216 #endif
3217
3218 String Internals::resourceLoadStatisticsForOrigin(const String& origin)
3219 {
3220     return ResourceLoadObserver::sharedObserver().statisticsForOrigin(origin);
3221 }
3222
3223 void Internals::setResourceLoadStatisticsEnabled(bool enable)
3224 {
3225     Settings::setResourceLoadStatisticsEnabled(enable);
3226 }
3227
3228 String Internals::composedTreeAsText(Node& node)
3229 {
3230     if (!is<ContainerNode>(node))
3231         return emptyString();
3232     return WebCore::composedTreeAsText(downcast<ContainerNode>(node));
3233 }
3234
3235 void Internals::setLinkPreloadSupport(bool enable)
3236 {
3237     RuntimeEnabledFeatures::sharedFeatures().setLinkPreloadEnabled(enable);
3238 }
3239
3240 #if ENABLE(CSS_GRID_LAYOUT)
3241
3242 void Internals::setCSSGridLayoutEnabled(bool enable)
3243 {
3244     RuntimeEnabledFeatures::sharedFeatures().setCSSGridLayoutEnabled(enable);
3245 }
3246
3247 #endif
3248
3249 #if ENABLE(WEBGL2)
3250
3251 bool Internals::webGL2Enabled() const
3252 {
3253     return RuntimeEnabledFeatures::sharedFeatures().webGL2Enabled();
3254 }
3255
3256 void Internals::setWebGL2Enabled(bool enable)
3257 {
3258     RuntimeEnabledFeatures::sharedFeatures().setWebGL2Enabled(enable);
3259 }
3260
3261 #endif
3262
3263 void Internals::setResourceTimingSupport(bool enable)
3264 {
3265     RuntimeEnabledFeatures::sharedFeatures().setResourceTimingEnabled(enable);
3266 }
3267
3268 bool Internals::isProcessingUserGesture()
3269 {
3270     return UserGestureIndicator::processingUserGesture();
3271 }
3272
3273 RefPtr<GCObservation> Internals::observeGC(JSC::JSValue value)
3274 {
3275     if (!value || value.isNull() || value.isUndefined() || !value.getObject())
3276         return nullptr;
3277
3278     return GCObservation::create(value.getObject());
3279 }
3280
3281 void Internals::setUserInterfaceLayoutDirection(UserInterfaceLayoutDirection userInterfaceLayoutDirection)
3282 {
3283     Document* document = contextDocument();
3284     if (!document)
3285         return;
3286
3287     Page* page = document->page();
3288     if (!page)
3289         return;
3290
3291     page->setUserInterfaceLayoutDirection(userInterfaceLayoutDirection == UserInterfaceLayoutDirection::LTR ? WebCore::UserInterfaceLayoutDirection::LTR : WebCore::UserInterfaceLayoutDirection::RTL);
3292 }
3293
3294 #if !PLATFORM(COCOA)
3295
3296 bool Internals::userPrefersReducedMotion() const
3297 {
3298     return false;
3299 }
3300
3301 #endif
3302
3303 } // namespace WebCore