Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm

   1 /*
   2  * Copyright (C) 2014-2018 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #import "config.h"
  27 #import "WKWebViewInternal.h"
  28
  29 #if WK_API_ENABLED
  30
  31 #import "APIFormClient.h"
  32 #import "APIPageConfiguration.h"
  33 #import "APISerializedScriptValue.h"
  34 #import "CompletionHandlerCallChecker.h"
  35 #import "DiagnosticLoggingClient.h"
  36 #import "FindClient.h"
  37 #import "FrontBoardServicesSPI.h"
  38 #import "FullscreenClient.h"
  39 #import "IconLoadingDelegate.h"
  40 #import "LegacySessionStateCoding.h"
  41 #import "Logging.h"
  42 #import "NavigationState.h"
  43 #import "ObjCObjectGraph.h"
  44 #import "RemoteLayerTreeScrollingPerformanceData.h"
  45 #import "RemoteLayerTreeTransaction.h"
  46 #import "RemoteObjectRegistry.h"
  47 #import "RemoteObjectRegistryMessages.h"
  48 #import "SandboxUtilities.h"
  49 #import "UIDelegate.h"
  50 #import "VersionChecks.h"
  51 #import "ViewGestureController.h"
  52 #import "ViewSnapshotStore.h"
  53 #import "WKBackForwardListInternal.h"
  54 #import "WKBackForwardListItemInternal.h"
  55 #import "WKBrowsingContextHandleInternal.h"
  56 #import "WKDragDestinationAction.h"
  57 #import "WKErrorInternal.h"
  58 #import "WKHistoryDelegatePrivate.h"
  59 #import "WKLayoutMode.h"
  60 #import "WKNSData.h"
  61 #import "WKNSURLExtras.h"
  62 #import "WKNavigationDelegate.h"
  63 #import "WKNavigationInternal.h"
  64 #import "WKPreferencesInternal.h"
  65 #import "WKProcessPoolInternal.h"
  66 #import "WKSharedAPICast.h"
  67 #import "WKSnapshotConfiguration.h"
  68 #import "WKUIDelegate.h"
  69 #import "WKUIDelegatePrivate.h"
  70 #import "WKUserContentControllerInternal.h"
  71 #import "WKWebViewConfigurationInternal.h"
  72 #import "WKWebViewContentProvider.h"
  73 #import "WKWebsiteDataStoreInternal.h"
  74 #import "WebBackForwardList.h"
  75 #import "WebCertificateInfo.h"
  76 #import "WebFullScreenManagerProxy.h"
  77 #import "WebPageGroup.h"
  78 #import "WebPageProxy.h"
  79 #import "WebPreferencesKeys.h"
  80 #import "WebProcessPool.h"
  81 #import "WebProcessProxy.h"
  82 #import "WebURLSchemeHandlerCocoa.h"
  83 #import "WebViewImpl.h"
  84 #import "_WKActivatedElementInfoInternal.h"
  85 #import "_WKDiagnosticLoggingDelegate.h"
  86 #import "_WKFindDelegate.h"
  87 #import "_WKFrameHandleInternal.h"
  88 #import "_WKFullscreenDelegate.h"
  89 #import "_WKHitTestResultInternal.h"
  90 #import "_WKInputDelegate.h"
  91 #import "_WKRemoteObjectRegistryInternal.h"
  92 #import "_WKSessionStateInternal.h"
  93 #import "_WKVisitedLinkStoreInternal.h"
  94 #import "_WKWebsitePoliciesInternal.h"
  95 #import <WebCore/AttachmentTypes.h>
  96 #import <WebCore/GraphicsContextCG.h>
  97 #import <WebCore/IOSurface.h>
  98 #import <WebCore/JSDOMBinding.h>
  99 #import <WebCore/JSDOMExceptionHandling.h>
 100 #import <WebCore/PlatformScreen.h>
 101 #import <WebCore/RuntimeApplicationChecks.h>
 102 #import <WebCore/SQLiteDatabaseTracker.h>
 103 #import <WebCore/SchemeRegistry.h>
 104 #import <WebCore/Settings.h>
 105 #import <WebCore/SharedBuffer.h>
 106 #import <WebCore/ValidationBubble.h>
 107 #import <WebCore/ViewportArguments.h>
 108 #import <WebCore/WritingMode.h>
 109 #import <pal/spi/cocoa/NSKeyedArchiverSPI.h>
 110 #import <pal/spi/mac/NSTextFinderSPI.h>
 111 #import <wtf/BlockPtr.h>
 112 #import <wtf/HashMap.h>
 113 #import <wtf/MathExtras.h>
 114 #import <wtf/NeverDestroyed.h>
 115 #import <wtf/Optional.h>
 116 #import <wtf/RetainPtr.h>
 117 #import <wtf/SetForScope.h>
 118 #import <wtf/UUID.h>
 119 #import <wtf/spi/darwin/dyldSPI.h>
 120 #import <wtf/text/TextStream.h>
 121
 122 #if ENABLE(APPLICATION_MANIFEST)
 123 #import "_WKApplicationManifestInternal.h"
 124 #endif
 125
 126 #if ENABLE(DATA_DETECTION)
 127 #import "WKDataDetectorTypesInternal.h"
 128 #endif
 129
 130 #if PLATFORM(IOS)
 131 #import "InteractionInformationAtPosition.h"
 132 #import "InteractionInformationRequest.h"
 133 #import "ProcessThrottler.h"
 134 #import "RemoteLayerTreeDrawingAreaProxy.h"
 135 #import "RemoteScrollingCoordinatorProxy.h"
 136 #import "UIKitSPI.h"
 137 #import "VideoFullscreenManagerProxy.h"
 138 #import "WKContentViewInteraction.h"
 139 #import "WKPDFView.h"
 140 #import "WKPasswordView.h"
 141 #import "WKScrollView.h"
 142 #import "WKWebViewContentProviderRegistry.h"
 143 #import "_WKWebViewPrintFormatter.h"
 144 #import <UIKit/UIApplication.h>
 145 #import <WebCore/FrameLoaderTypes.h>
 146 #import <WebCore/InspectorOverlay.h>
 147 #import <WebCore/ScrollableArea.h>
 148 #import <WebCore/WebBackgroundTaskController.h>
 149 #import <WebCore/WebSQLiteDatabaseTrackerClient.h>
 150 #import <pal/spi/cg/CoreGraphicsSPI.h>
 151 #import <pal/spi/cocoa/QuartzCoreSPI.h>
 152
 153 #if __has_include(<AccessibilitySupport.h>)
 154 #include <AccessibilitySupport.h>
 155 #else
 156 extern "C" {
 157 CFStringRef kAXSAllowForceWebScalingEnabledNotification;
 158 }
 159 #endif
 160
 161 #define RELEASE_LOG_IF_ALLOWED(...) RELEASE_LOG_IF(_page && _page->isAlwaysOnLoggingAllowed(), ViewState, __VA_ARGS__)
 162
 163 @interface UIScrollView (UIScrollViewInternal)
 164 - (void)_adjustForAutomaticKeyboardInfo:(NSDictionary*)info animated:(BOOL)animated lastAdjustment:(CGFloat*)lastAdjustment;
 165 - (BOOL)_isScrollingToTop;
 166 - (CGPoint)_animatedTargetOffset;
 167 @end
 168
 169 @interface UIPeripheralHost(UIKitInternal)
 170 - (CGFloat)getVerticalOverlapForView:(UIView *)view usingKeyboardInfo:(NSDictionary *)info;
 171 @end
 172
 173 @interface UIView (UIViewInternal)
 174 - (UIViewController *)_viewControllerForAncestor;
 175 @end
 176
 177 @interface UIWindow (UIWindowInternal)
 178 - (BOOL)_isHostedInAnotherProcess;
 179 @end
 180
 181 @interface UIViewController (UIViewControllerInternal)
 182 - (UIViewController *)_rootAncestorViewController;
 183 - (UIViewController *)_viewControllerForSupportedInterfaceOrientations;
 184 @end
 185
 186 enum class DynamicViewportUpdateMode {
 187     NotResizing,
 188     ResizingWithAnimation,
 189     ResizingWithDocumentHidden,
 190 };
 191
 192 struct ActiveViewportLayoutSizes {
 193     WebCore::FloatSize minimumLayoutSize;
 194     WebCore::FloatSize viewSize;
 195 };
 196
 197 #endif // PLATFORM(IOS)
 198
 199 #if PLATFORM(IOS)
 200 static const uint32_t firstSDKVersionWithLinkPreviewEnabledByDefault = 0xA0000;
 201 #endif
 202
 203 #if PLATFORM(MAC)
 204 #import "WKTextFinderClient.h"
 205 #import "WKViewInternal.h"
 206 #import <WebCore/ColorMac.h>
 207
 208 @interface WKWebView () <WebViewImplDelegate, NSTextInputClient>
 209 @end
 210
 211 #if HAVE(TOUCH_BAR)
 212 @interface WKWebView () <NSTouchBarProvider>
 213 @end
 214 #endif // HAVE(TOUCH_BAR)
 215 #endif // PLATFORM(MAC)
 216
 217 static HashMap<WebKit::WebPageProxy*, WKWebView *>& pageToViewMap()
 218 {
 219     static NeverDestroyed<HashMap<WebKit::WebPageProxy*, WKWebView *>> map;
 220     return map;
 221 }
 222
 223 WKWebView* fromWebPageProxy(WebKit::WebPageProxy& page)
 224 {
 225     return pageToViewMap().get(&page);
 226 }
 227
 228 #if PLATFORM(MAC)
 229 static _WKOverlayScrollbarStyle toAPIScrollbarStyle(std::optional<WebCore::ScrollbarOverlayStyle> coreScrollbarStyle)
 230 {
 231     if (!coreScrollbarStyle)
 232         return _WKOverlayScrollbarStyleAutomatic;
 233
 234     switch (coreScrollbarStyle.value()) {
 235     case WebCore::ScrollbarOverlayStyleDark:
 236         return _WKOverlayScrollbarStyleDark;
 237     case WebCore::ScrollbarOverlayStyleLight:
 238         return _WKOverlayScrollbarStyleLight;
 239     case WebCore::ScrollbarOverlayStyleDefault:
 240         return _WKOverlayScrollbarStyleDefault;
 241     }
 242     ASSERT_NOT_REACHED();
 243     return _WKOverlayScrollbarStyleAutomatic;
 244 }
 245
 246 static std::optional<WebCore::ScrollbarOverlayStyle> toCoreScrollbarStyle(_WKOverlayScrollbarStyle scrollbarStyle)
 247 {
 248     switch (scrollbarStyle) {
 249     case _WKOverlayScrollbarStyleDark:
 250         return WebCore::ScrollbarOverlayStyleDark;
 251     case _WKOverlayScrollbarStyleLight:
 252         return WebCore::ScrollbarOverlayStyleLight;
 253     case _WKOverlayScrollbarStyleDefault:
 254         return WebCore::ScrollbarOverlayStyleDefault;
 255     case _WKOverlayScrollbarStyleAutomatic:
 256         break;
 257     }
 258     return std::nullopt;
 259 }
 260 #endif
 261
 262 @implementation WKWebView {
 263     std::unique_ptr<WebKit::NavigationState> _navigationState;
 264     std::unique_ptr<WebKit::UIDelegate> _uiDelegate;
 265     std::unique_ptr<WebKit::IconLoadingDelegate> _iconLoadingDelegate;
 266
 267     _WKRenderingProgressEvents _observedRenderingProgressEvents;
 268
 269     WebKit::WeakObjCPtr<id <_WKInputDelegate>> _inputDelegate;
 270
 271 #if PLATFORM(IOS)
 272     RetainPtr<_WKRemoteObjectRegistry> _remoteObjectRegistry;
 273
 274     RetainPtr<WKScrollView> _scrollView;
 275     RetainPtr<WKContentView> _contentView;
 276
 277 #if ENABLE(FULLSCREEN_API)
 278     RetainPtr<WKFullScreenWindowController> _fullScreenWindowController;
 279 #endif
 280
 281     BOOL _overridesMinimumLayoutSize;
 282     CGSize _minimumLayoutSizeOverride;
 283     std::optional<WebCore::FloatSize> _lastSentMinimumLayoutSize;
 284     BOOL _overridesMaximumUnobscuredSize;
 285     CGSize _maximumUnobscuredSizeOverride;
 286     std::optional<WebCore::FloatSize> _lastSentMaximumUnobscuredSize;
 287     CGRect _inputViewBounds;
 288     CGFloat _viewportMetaTagWidth;
 289     BOOL _viewportMetaTagWidthWasExplicit;
 290     BOOL _viewportMetaTagCameFromImageDocument;
 291     CGFloat _initialScaleFactor;
 292     BOOL _fastClickingIsDisabled;
 293
 294     BOOL _allowsLinkPreview;
 295
 296     UIEdgeInsets _obscuredInsets;
 297     BOOL _haveSetObscuredInsets;
 298     BOOL _isChangingObscuredInsetsInteractively;
 299
 300     UIEdgeInsets _unobscuredSafeAreaInsets;
 301     BOOL _haveSetUnobscuredSafeAreaInsets;
 302     BOOL _avoidsUnsafeArea;
 303     UIRectEdge _obscuredInsetEdgesAffectedBySafeArea;
 304
 305     UIInterfaceOrientation _interfaceOrientationOverride;
 306     BOOL _overridesInterfaceOrientation;
 307     std::optional<int32_t> _lastSentDeviceOrientation;
 308
 309     BOOL _allowsViewportShrinkToFit;
 310     BOOL _forceHorizontalViewportShrinkToFit;
 311     CGFloat _minimumAllowedLayoutWidth;
 312
 313     BOOL _hasCommittedLoadForMainFrame;
 314     BOOL _needsResetViewStateAfterCommitLoadForMainFrame;
 315     uint64_t _firstPaintAfterCommitLoadTransactionID;
 316     DynamicViewportUpdateMode _dynamicViewportUpdateMode;
 317     CATransform3D _resizeAnimationTransformAdjustments;
 318     std::optional<uint64_t> _resizeAnimationTransformTransactionID;
 319     RetainPtr<UIView> _resizeAnimationView;
 320     CGFloat _lastAdjustmentForScroller;
 321     std::optional<CGRect> _frozenVisibleContentRect;
 322     std::optional<CGRect> _frozenUnobscuredContentRect;
 323
 324     BOOL _commitDidRestoreScrollPosition;
 325     std::optional<WebCore::FloatPoint> _scrollOffsetToRestore;
 326     WebCore::FloatBoxExtent _obscuredInsetsWhenSaved;
 327
 328     std::optional<WebCore::FloatPoint> _unobscuredCenterToRestore;
 329     std::optional<uint64_t> _firstTransactionIDAfterPageRestore;
 330     double _scaleToRestore;
 331
 332     std::unique_ptr<WebKit::ViewGestureController> _gestureController;
 333     BOOL _allowsBackForwardNavigationGestures;
 334
 335     RetainPtr<UIView <WKWebViewContentProvider>> _customContentView;
 336     RetainPtr<UIView> _customContentFixedOverlayView;
 337
 338     RetainPtr<NSTimer> _enclosingScrollViewScrollTimer;
 339     BOOL _didScrollSinceLastTimerFire;
 340
 341     WebCore::Color _scrollViewBackgroundColor;
 342
 343     // This value tracks the current adjustment added to the bottom inset due to the keyboard sliding out from the bottom
 344     // when computing obscured content insets. This is used when updating the visible content rects where we should not
 345     // include this adjustment.
 346     CGFloat _totalScrollViewBottomInsetAdjustmentForKeyboard;
 347     BOOL _currentlyAdjustingScrollViewInsetsForKeyboard;
 348
 349     BOOL _delayUpdateVisibleContentRects;
 350     BOOL _hadDelayedUpdateVisibleContentRects;
 351
 352     int _activeAnimatedResizeCount;
 353
 354     Vector<WTF::Function<void ()>> _snapshotsDeferredDuringResize;
 355     RetainPtr<NSMutableArray> _stableStatePresentationUpdateCallbacks;
 356
 357     RetainPtr<WKPasswordView> _passwordView;
 358
 359     BOOL _hasScheduledVisibleRectUpdate;
 360     BOOL _visibleContentRectUpdateScheduledFromScrollViewInStableState;
 361     Vector<BlockPtr<void ()>> _visibleContentRectUpdateCallbacks;
 362 #endif
 363 #if PLATFORM(MAC)
 364     std::unique_ptr<WebKit::WebViewImpl> _impl;
 365     RetainPtr<WKTextFinderClient> _textFinderClient;
 366 #endif
 367
 368 #if PLATFORM(IOS)
 369     _WKDragInteractionPolicy _dragInteractionPolicy;
 370 #endif
 371 }
 372
 373 - (instancetype)initWithFrame:(CGRect)frame
 374 {
 375     return [self initWithFrame:frame configuration:adoptNS([[WKWebViewConfiguration alloc] init]).get()];
 376 }
 377
 378 - (BOOL)_isValid
 379 {
 380     return _page && _page->isValid();
 381 }
 382
 383 #if PLATFORM(IOS)
 384 static int32_t deviceOrientationForUIInterfaceOrientation(UIInterfaceOrientation orientation)
 385 {
 386     switch (orientation) {
 387     case UIInterfaceOrientationUnknown:
 388     case UIInterfaceOrientationPortrait:
 389         return 0;
 390     case UIInterfaceOrientationPortraitUpsideDown:
 391         return 180;
 392     case UIInterfaceOrientationLandscapeLeft:
 393         return -90;
 394     case UIInterfaceOrientationLandscapeRight:
 395         return 90;
 396     }
 397 }
 398
 399 static int32_t deviceOrientation()
 400 {
 401     return deviceOrientationForUIInterfaceOrientation([[UIApplication sharedApplication] statusBarOrientation]);
 402 }
 403
 404 - (BOOL)_isShowingVideoPictureInPicture
 405 {
 406 #if !HAVE(AVKIT)
 407     return false;
 408 #else
 409     if (!_page || !_page->videoFullscreenManager())
 410         return false;
 411
 412     return _page->videoFullscreenManager()->hasMode(WebCore::HTMLMediaElementEnums::VideoFullscreenModePictureInPicture);
 413 #endif
 414 }
 415
 416 - (BOOL)_mayAutomaticallyShowVideoPictureInPicture
 417 {
 418 #if !HAVE(AVKIT)
 419     return false;
 420 #else
 421     if (!_page || !_page->videoFullscreenManager())
 422         return false;
 423
 424     return _page->videoFullscreenManager()->mayAutomaticallyShowVideoPictureInPicture();
 425 #endif
 426 }
 427
 428 static bool shouldAllowPictureInPictureMediaPlayback()
 429 {
 430     static bool shouldAllowPictureInPictureMediaPlayback = dyld_get_program_sdk_version() >= DYLD_IOS_VERSION_9_0;
 431     return shouldAllowPictureInPictureMediaPlayback;
 432 }
 433
 434 static bool shouldAllowSettingAnyXHRHeaderFromFileURLs()
 435 {
 436     static bool shouldAllowSettingAnyXHRHeaderFromFileURLs = (WebCore::IOSApplication::isCardiogram() || WebCore::IOSApplication::isNike()) && !linkedOnOrAfter(WebKit::SDKVersion::FirstThatDisallowsSettingAnyXHRHeaderFromFileURLs);
 437     return shouldAllowSettingAnyXHRHeaderFromFileURLs;
 438 }
 439
 440 #endif
 441
 442 static bool shouldRequireUserGestureToLoadVideo()
 443 {
 444 #if PLATFORM(IOS)
 445     static bool shouldRequireUserGestureToLoadVideo = dyld_get_program_sdk_version() >= DYLD_IOS_VERSION_10_0;
 446     return shouldRequireUserGestureToLoadVideo;
 447 #else
 448     return false;
 449 #endif
 450 }
 451
 452 #if PLATFORM(MAC)
 453 static uint32_t convertUserInterfaceDirectionPolicy(WKUserInterfaceDirectionPolicy policy)
 454 {
 455     switch (policy) {
 456     case WKUserInterfaceDirectionPolicyContent:
 457         return static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::Content);
 458     case WKUserInterfaceDirectionPolicySystem:
 459         return static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::System);
 460     }
 461     return static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::Content);
 462 }
 463
 464 static uint32_t convertSystemLayoutDirection(NSUserInterfaceLayoutDirection direction)
 465 {
 466     switch (direction) {
 467     case NSUserInterfaceLayoutDirectionLeftToRight:
 468         return static_cast<uint32_t>(WebCore::UserInterfaceLayoutDirection::LTR);
 469     case NSUserInterfaceLayoutDirectionRightToLeft:
 470         return static_cast<uint32_t>(WebCore::UserInterfaceLayoutDirection::RTL);
 471     }
 472     return static_cast<uint32_t>(WebCore::UserInterfaceLayoutDirection::LTR);
 473 }
 474 #endif
 475
 476 static void validate(WKWebViewConfiguration *configuration)
 477 {
 478     if (!configuration.processPool)
 479         [NSException raise:NSInvalidArgumentException format:@"configuration.processPool is nil"];
 480
 481     if (!configuration.preferences)
 482         [NSException raise:NSInvalidArgumentException format:@"configuration.preferences is nil"];
 483
 484     if (!configuration.userContentController)
 485         [NSException raise:NSInvalidArgumentException format:@"configuration.userContentController is nil"];
 486
 487     if (!configuration.websiteDataStore)
 488         [NSException raise:NSInvalidArgumentException format:@"configuration.websiteDataStore is nil"];
 489
 490     if (!configuration._visitedLinkStore)
 491         [NSException raise:NSInvalidArgumentException format:@"configuration._visitedLinkStore is nil"];
 492
 493 #if PLATFORM(IOS)
 494     if (!configuration._contentProviderRegistry)
 495         [NSException raise:NSInvalidArgumentException format:@"configuration._contentProviderRegistry is nil"];
 496 #endif
 497 }
 498
 499 - (void)_initializeWithConfiguration:(WKWebViewConfiguration *)configuration
 500 {
 501     if (!configuration)
 502         [NSException raise:NSInvalidArgumentException format:@"Configuration cannot be nil"];
 503
 504     _configuration = adoptNS([configuration copy]);
 505
 506     if (WKWebView *relatedWebView = [_configuration _relatedWebView]) {
 507         WKProcessPool *processPool = [_configuration processPool];
 508         WKProcessPool *relatedWebViewProcessPool = [relatedWebView->_configuration processPool];
 509         if (processPool && processPool != relatedWebViewProcessPool)
 510             [NSException raise:NSInvalidArgumentException format:@"Related web view %@ has process pool %@ but configuration specifies a different process pool %@", relatedWebView, relatedWebViewProcessPool, configuration.processPool];
 511
 512         [_configuration setProcessPool:relatedWebViewProcessPool];
 513     }
 514
 515     validate(_configuration.get());
 516
 517     WebKit::WebProcessPool& processPool = *[_configuration processPool]->_processPool;
 518     processPool.setResourceLoadStatisticsEnabled(configuration.websiteDataStore._resourceLoadStatisticsEnabled);
 519
 520     auto pageConfiguration = API::PageConfiguration::create();
 521
 522     pageConfiguration->setProcessPool(&processPool);
 523     pageConfiguration->setPreferences([_configuration preferences]->_preferences.get());
 524     if (WKWebView *relatedWebView = [_configuration _relatedWebView])
 525         pageConfiguration->setRelatedPage(relatedWebView->_page.get());
 526
 527     pageConfiguration->setUserContentController([_configuration userContentController]->_userContentControllerProxy.get());
 528     pageConfiguration->setVisitedLinkStore([_configuration _visitedLinkStore]->_visitedLinkStore.get());
 529     pageConfiguration->setWebsiteDataStore([_configuration websiteDataStore]->_websiteDataStore.get());
 530     pageConfiguration->setTreatsSHA1SignedCertificatesAsInsecure([_configuration _treatsSHA1SignedCertificatesAsInsecure]);
 531
 532     if (NSString *overrideContentSecurityPolicy = configuration._overrideContentSecurityPolicy)
 533         pageConfiguration->setOverrideContentSecurityPolicy(overrideContentSecurityPolicy);
 534
 535 #if PLATFORM(MAC)
 536     if (auto pageGroup = WebKit::toImpl([configuration _pageGroup])) {
 537         pageConfiguration->setPageGroup(pageGroup);
 538         pageConfiguration->setUserContentController(&pageGroup->userContentController());
 539     } else
 540 #endif
 541     {
 542         NSString *groupIdentifier = configuration._groupIdentifier;
 543         if (groupIdentifier.length)
 544             pageConfiguration->setPageGroup(WebKit::WebPageGroup::create(configuration._groupIdentifier).ptr());
 545     }
 546
 547     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::suppressesIncrementalRenderingKey(), WebKit::WebPreferencesStore::Value(!![_configuration suppressesIncrementalRendering]));
 548
 549     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldRespectImageOrientationKey(), WebKit::WebPreferencesStore::Value(!![_configuration _respectsImageOrientation]));
 550     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldPrintBackgroundsKey(), WebKit::WebPreferencesStore::Value(!![_configuration _printsBackgrounds]));
 551     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::incrementalRenderingSuppressionTimeoutKey(), WebKit::WebPreferencesStore::Value([_configuration _incrementalRenderingSuppressionTimeout]));
 552     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::javaScriptMarkupEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowsJavaScriptMarkup]));
 553     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldConvertPositionStyleOnCopyKey(), WebKit::WebPreferencesStore::Value(!![_configuration _convertsPositionStyleOnCopy]));
 554     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::httpEquivEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowsMetaRefresh]));
 555     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowUniversalAccessFromFileURLsKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowUniversalAccessFromFileURLs]));
 556     pageConfiguration->setInitialCapitalizationEnabled([_configuration _initialCapitalizationEnabled]);
 557     pageConfiguration->setWaitsForPaintAfterViewDidMoveToWindow([_configuration _waitsForPaintAfterViewDidMoveToWindow]);
 558     pageConfiguration->setControlledByAutomation([_configuration _isControlledByAutomation]);
 559
 560 #if ENABLE(APPLICATION_MANIFEST)
 561     pageConfiguration->setApplicationManifest([_configuration _applicationManifest] ? [configuration _applicationManifest]->_applicationManifest.get() : nullptr);
 562 #endif
 563
 564 #if PLATFORM(MAC)
 565     if (auto cpuLimit = [_configuration _cpuLimit])
 566         pageConfiguration->setCPULimit(cpuLimit);
 567     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::showsURLsInToolTipsEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _showsURLsInToolTips]));
 568     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::serviceControlsEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _serviceControlsEnabled]));
 569     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::imageControlsEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _imageControlsEnabled]));
 570
 571     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::userInterfaceDirectionPolicyKey(), WebKit::WebPreferencesStore::Value(convertUserInterfaceDirectionPolicy([_configuration userInterfaceDirectionPolicy])));
 572     // We are in the View's initialization routine, so our client hasn't had time to set our user interface direction.
 573     // Therefore, according to the docs[1], "this property contains the value reported by the app's userInterfaceLayoutDirection property."
 574     // [1] http://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSView_Class/index.html#//apple_ref/doc/uid/20000014-SW222
 575     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::systemLayoutDirectionKey(), WebKit::WebPreferencesStore::Value(convertSystemLayoutDirection(self.userInterfaceLayoutDirection)));
 576 #endif
 577
 578 #if PLATFORM(IOS)
 579     pageConfiguration->setAlwaysRunsAtForegroundPriority([_configuration _alwaysRunsAtForegroundPriority]);
 580
 581     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsInlineMediaPlaybackKey(), WebKit::WebPreferencesStore::Value(!![_configuration allowsInlineMediaPlayback]));
 582     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsInlineMediaPlaybackAfterFullscreenKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowsInlineMediaPlaybackAfterFullscreen]));
 583     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::inlineMediaPlaybackRequiresPlaysInlineAttributeKey(), WebKit::WebPreferencesStore::Value(!![_configuration _inlineMediaPlaybackRequiresPlaysInlineAttribute]));
 584     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsPictureInPictureMediaPlaybackKey(), WebKit::WebPreferencesStore::Value(!![_configuration allowsPictureInPictureMediaPlayback] && shouldAllowPictureInPictureMediaPlayback()));
 585     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::userInterfaceDirectionPolicyKey(), WebKit::WebPreferencesStore::Value(static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::Content)));
 586     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::systemLayoutDirectionKey(), WebKit::WebPreferencesStore::Value(static_cast<uint32_t>(WebCore::LTR)));
 587     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowSettingAnyXHRHeaderFromFileURLsKey(), WebKit::WebPreferencesStore::Value(shouldAllowSettingAnyXHRHeaderFromFileURLs()));
 588 #endif
 589
 590     WKAudiovisualMediaTypes mediaTypesRequiringUserGesture = [_configuration mediaTypesRequiringUserActionForPlayback];
 591     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::requiresUserGestureForVideoPlaybackKey(), WebKit::WebPreferencesStore::Value((mediaTypesRequiringUserGesture & WKAudiovisualMediaTypeVideo) == WKAudiovisualMediaTypeVideo));
 592     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::requiresUserGestureForAudioPlaybackKey(), WebKit::WebPreferencesStore::Value(((mediaTypesRequiringUserGesture & WKAudiovisualMediaTypeAudio) == WKAudiovisualMediaTypeAudio)));
 593     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::requiresUserGestureToLoadVideoKey(), WebKit::WebPreferencesStore::Value(shouldRequireUserGestureToLoadVideo()));
 594     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::mainContentUserGestureOverrideEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _mainContentUserGestureOverrideEnabled]));
 595     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::invisibleAutoplayNotPermittedKey(), WebKit::WebPreferencesStore::Value(!![_configuration _invisibleAutoplayNotPermitted]));
 596     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::mediaDataLoadsAutomaticallyKey(), WebKit::WebPreferencesStore::Value(!![_configuration _mediaDataLoadsAutomatically]));
 597     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::attachmentElementEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _attachmentElementEnabled]));
 598
 599 #if ENABLE(DATA_DETECTION) && PLATFORM(IOS)
 600     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::dataDetectorTypesKey(), WebKit::WebPreferencesStore::Value(static_cast<uint32_t>(fromWKDataDetectorTypes([_configuration dataDetectorTypes]))));
 601 #endif
 602 #if ENABLE(WIRELESS_PLAYBACK_TARGET)
 603     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsAirPlayForMediaPlaybackKey(), WebKit::WebPreferencesStore::Value(!![_configuration allowsAirPlayForMediaPlayback]));
 604 #endif
 605
 606 #if ENABLE(APPLE_PAY)
 607     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::applePayEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _applePayEnabled]));
 608 #endif
 609
 610     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::needsStorageAccessFromFileURLsQuirkKey(), WebKit::WebPreferencesStore::Value(!![_configuration _needsStorageAccessFromFileURLsQuirk]));
 611     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::mediaContentTypesRequiringHardwareSupportKey(), WebKit::WebPreferencesStore::Value(String([_configuration _mediaContentTypesRequiringHardwareSupport])));
 612     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowMediaContentTypesRequiringHardwareSupportAsFallbackKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowMediaContentTypesRequiringHardwareSupportAsFallback]));
 613
 614 #if ENABLE(LEGACY_ENCRYPTED_MEDIA)
 615     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::legacyEncryptedMediaAPIEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _legacyEncryptedMediaAPIEnabled]));
 616 #endif
 617
 618 #if PLATFORM(IOS) && ENABLE(SERVICE_WORKER)
 619     if (!WebKit::processHasEntitlement(@"com.apple.developer.WebKit.ServiceWorkers"))
 620         pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::serviceWorkersEnabledKey(), WebKit::WebPreferencesStore::Value(false));
 621 #endif
 622
 623 #if PLATFORM(IOS)
 624     CGRect bounds = self.bounds;
 625     _scrollView = adoptNS([[WKScrollView alloc] initWithFrame:bounds]);
 626     [_scrollView setInternalDelegate:self];
 627     [_scrollView setBouncesZoom:YES];
 628
 629     _avoidsUnsafeArea = YES;
 630     [self _updateScrollViewInsetAdjustmentBehavior];
 631
 632     [self addSubview:_scrollView.get()];
 633
 634     static uint32_t programSDKVersion = dyld_get_program_sdk_version();
 635     _allowsLinkPreview = programSDKVersion >= firstSDKVersionWithLinkPreviewEnabledByDefault;
 636
 637     _contentView = adoptNS([[WKContentView alloc] initWithFrame:bounds processPool:processPool configuration:WTFMove(pageConfiguration) webView:self]);
 638
 639     _page = [_contentView page];
 640     [self _dispatchSetDeviceOrientation:deviceOrientation()];
 641     _page->setDrawsBackground(self.opaque);
 642
 643     [_contentView layer].anchorPoint = CGPointZero;
 644     [_contentView setFrame:bounds];
 645     [_scrollView addSubview:_contentView.get()];
 646     [_scrollView addSubview:[_contentView unscaledView]];
 647     [self _updateScrollViewBackground];
 648     _obscuredInsetEdgesAffectedBySafeArea = UIRectEdgeTop | UIRectEdgeLeft | UIRectEdgeRight;
 649
 650     _viewportMetaTagWidth = WebCore::ViewportArguments::ValueAuto;
 651     _initialScaleFactor = 1;
 652     _fastClickingIsDisabled = [[NSUserDefaults standardUserDefaults] boolForKey:@"WebKitFastClickingDisabled"];
 653
 654     [self _frameOrBoundsChanged];
 655
 656     NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
 657     [center addObserver:self selector:@selector(_keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
 658     [center addObserver:self selector:@selector(_keyboardDidChangeFrame:) name:UIKeyboardDidChangeFrameNotification object:nil];
 659     [center addObserver:self selector:@selector(_keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
 660     [center addObserver:self selector:@selector(_keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
 661     [center addObserver:self selector:@selector(_keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
 662     [center addObserver:self selector:@selector(_windowDidRotate:) name:UIWindowDidRotateNotification object:nil];
 663     [center addObserver:self selector:@selector(_contentSizeCategoryDidChange:) name:UIContentSizeCategoryDidChangeNotification object:nil];
 664     _page->contentSizeCategoryDidChange([self _contentSizeCategory]);
 665
 666     [center addObserver:self selector:@selector(_accessibilitySettingsDidChange:) name:UIAccessibilityGrayscaleStatusDidChangeNotification object:nil];
 667     [center addObserver:self selector:@selector(_accessibilitySettingsDidChange:) name:UIAccessibilityInvertColorsStatusDidChangeNotification object:nil];
 668     [center addObserver:self selector:@selector(_accessibilitySettingsDidChange:) name:UIAccessibilityReduceMotionStatusDidChangeNotification object:nil];
 669
 670     [[_configuration _contentProviderRegistry] addPage:*_page];
 671     _page->setForceAlwaysUserScalable([_configuration ignoresViewportScaleLimits]);
 672 #endif
 673
 674 #if PLATFORM(MAC)
 675     _impl = std::make_unique<WebKit::WebViewImpl>(self, self, processPool, WTFMove(pageConfiguration));
 676     _page = &_impl->page();
 677
 678     _impl->setAutomaticallyAdjustsContentInsets(true);
 679     _impl->setRequiresUserActionForEditingControlsManager([configuration _requiresUserActionForEditingControlsManager]);
 680 #endif
 681
 682     _page->setBackgroundExtendsBeyondPage(true);
 683
 684     if (NSString *applicationNameForUserAgent = configuration.applicationNameForUserAgent)
 685         _page->setApplicationNameForUserAgent(applicationNameForUserAgent);
 686
 687     _navigationState = std::make_unique<WebKit::NavigationState>(self);
 688     _page->setNavigationClient(_navigationState->createNavigationClient());
 689
 690     _uiDelegate = std::make_unique<WebKit::UIDelegate>(self);
 691     _page->setFindClient(std::make_unique<WebKit::FindClient>(self));
 692     _page->setDiagnosticLoggingClient(std::make_unique<WebKit::DiagnosticLoggingClient>(self));
 693
 694     _iconLoadingDelegate = std::make_unique<WebKit::IconLoadingDelegate>(self);
 695
 696 #if PLATFORM(IOS)
 697     [self _setUpSQLiteDatabaseTrackerClient];
 698 #endif
 699
 700     auto *handlers = _configuration.get()._urlSchemeHandlers;
 701     for (NSString *key in handlers)
 702         _page->setURLSchemeHandlerForScheme(WebKit::WebURLSchemeHandlerCocoa::create(handlers[key]), key);
 703
 704     pageToViewMap().add(_page.get(), self);
 705
 706 #if PLATFORM(IOS)
 707     _dragInteractionPolicy = _WKDragInteractionPolicyDefault;
 708 #if ENABLE(EXTRA_ZOOM_MODE)
 709     _minimumAllowedLayoutWidth = 320;
 710     _allowsViewportShrinkToFit = YES;
 711     _forceHorizontalViewportShrinkToFit = YES;
 712 #else
 713     _minimumAllowedLayoutWidth = 0;
 714     _allowsViewportShrinkToFit = NO;
 715     _forceHorizontalViewportShrinkToFit = NO;
 716 #endif
 717 #endif // PLATFORM(IOS)
 718 }
 719
 720 - (void)_setUpSQLiteDatabaseTrackerClient
 721 {
 722 #if PLATFORM(IOS)
 723     WebBackgroundTaskController *controller = [WebBackgroundTaskController sharedController];
 724     if (controller.backgroundTaskStartBlock)
 725         return;
 726
 727     controller.backgroundTaskStartBlock = ^NSUInteger (void (^expirationHandler)())
 728     {
 729         return [[UIApplication sharedApplication] beginBackgroundTaskWithName:@"com.apple.WebKit.DatabaseActivity" expirationHandler:expirationHandler];
 730     };
 731     controller.backgroundTaskEndBlock = ^(UIBackgroundTaskIdentifier taskIdentifier)
 732     {
 733         [[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];
 734     };
 735     controller.invalidBackgroundTaskIdentifier = UIBackgroundTaskInvalid;
 736
 737     WebCore::SQLiteDatabaseTracker::setClient(&WebCore::WebSQLiteDatabaseTrackerClient::sharedWebSQLiteDatabaseTrackerClient());
 738 #endif
 739 }
 740
 741 - (instancetype)initWithFrame:(CGRect)frame configuration:(WKWebViewConfiguration *)configuration
 742 {
 743     if (!(self = [super initWithFrame:frame]))
 744         return nil;
 745
 746     [self _initializeWithConfiguration:configuration];
 747
 748     return self;
 749 }
 750
 751 - (instancetype)initWithCoder:(NSCoder *)coder
 752 {
 753     if (!(self = [super initWithCoder:coder]))
 754         return nil;
 755
 756     WKWebViewConfiguration *configuration = decodeObjectOfClassForKeyFromCoder([WKWebViewConfiguration class], @"configuration", coder);
 757     [self _initializeWithConfiguration:configuration];
 758
 759     self.allowsBackForwardNavigationGestures = [coder decodeBoolForKey:@"allowsBackForwardNavigationGestures"];
 760     self.customUserAgent = decodeObjectOfClassForKeyFromCoder([NSString class], @"customUserAgent", coder);
 761     self.allowsLinkPreview = [coder decodeBoolForKey:@"allowsLinkPreview"];
 762
 763 #if PLATFORM(MAC)
 764     self.allowsMagnification = [coder decodeBoolForKey:@"allowsMagnification"];
 765     self.magnification = [coder decodeDoubleForKey:@"magnification"];
 766 #endif
 767
 768     return self;
 769 }
 770
 771 - (void)encodeWithCoder:(NSCoder *)coder
 772 {
 773     [super encodeWithCoder:coder];
 774
 775     [coder encodeObject:_configuration.get() forKey:@"configuration"];
 776
 777     [coder encodeBool:self.allowsBackForwardNavigationGestures forKey:@"allowsBackForwardNavigationGestures"];
 778     [coder encodeObject:self.customUserAgent forKey:@"customUserAgent"];
 779     [coder encodeBool:self.allowsLinkPreview forKey:@"allowsLinkPreview"];
 780
 781 #if PLATFORM(MAC)
 782     [coder encodeBool:self.allowsMagnification forKey:@"allowsMagnification"];
 783     [coder encodeDouble:self.magnification forKey:@"magnification"];
 784 #endif
 785 }
 786
 787 - (void)dealloc
 788 {
 789 #if PLATFORM(MAC)
 790     [_textFinderClient willDestroyView:self];
 791 #endif
 792
 793 #if PLATFORM(IOS)
 794     [_contentView _webViewDestroyed];
 795
 796     if (_remoteObjectRegistry)
 797         _page->process().processPool().removeMessageReceiver(Messages::RemoteObjectRegistry::messageReceiverName(), _page->pageID());
 798 #endif
 799
 800     _page->close();
 801
 802 #if PLATFORM(IOS)
 803     [_remoteObjectRegistry _invalidate];
 804     [[_configuration _contentProviderRegistry] removePage:*_page];
 805     CFNotificationCenterRemoveObserver(CFNotificationCenterGetDarwinNotifyCenter(), (__bridge const void *)(self), nullptr, nullptr);
 806     [[NSNotificationCenter defaultCenter] removeObserver:self];
 807     [_scrollView setInternalDelegate:nil];
 808 #endif
 809
 810     pageToViewMap().remove(_page.get());
 811
 812     [super dealloc];
 813 }
 814
 815 - (WKWebViewConfiguration *)configuration
 816 {
 817     return [[_configuration copy] autorelease];
 818 }
 819
 820 - (WKBackForwardList *)backForwardList
 821 {
 822     return wrapper(_page->backForwardList());
 823 }
 824
 825 - (id <WKNavigationDelegate>)navigationDelegate
 826 {
 827     return _navigationState->navigationDelegate().autorelease();
 828 }
 829
 830 - (void)setNavigationDelegate:(id <WKNavigationDelegate>)navigationDelegate
 831 {
 832     _page->setNavigationClient(_navigationState->createNavigationClient());
 833     _navigationState->setNavigationDelegate(navigationDelegate);
 834 }
 835
 836 - (id <WKUIDelegate>)UIDelegate
 837 {
 838     return _uiDelegate->delegate().autorelease();
 839 }
 840
 841 - (void)setUIDelegate:(id<WKUIDelegate>)UIDelegate
 842 {
 843     _uiDelegate->setDelegate(UIDelegate);
 844 #if ENABLE(CONTEXT_MENUS)
 845     _page->setContextMenuClient(_uiDelegate->createContextMenuClient());
 846 #endif
 847     _page->setUIClient(_uiDelegate->createUIClient());
 848 }
 849
 850 - (id <_WKIconLoadingDelegate>)_iconLoadingDelegate
 851 {
 852     return _iconLoadingDelegate->delegate().autorelease();
 853 }
 854
 855 - (void)_setIconLoadingDelegate:(id<_WKIconLoadingDelegate>)iconLoadingDelegate
 856 {
 857     _page->setIconLoadingClient(_iconLoadingDelegate->createIconLoadingClient());
 858     _iconLoadingDelegate->setDelegate(iconLoadingDelegate);
 859 }
 860
 861 - (WKNavigation *)loadRequest:(NSURLRequest *)request
 862 {
 863     auto navigation = _page->loadRequest(request);
 864     if (!navigation)
 865         return nil;
 866
 867     return [wrapper(*navigation.leakRef()) autorelease];
 868 }
 869
 870 - (WKNavigation *)loadFileURL:(NSURL *)URL allowingReadAccessToURL:(NSURL *)readAccessURL
 871 {
 872     if (![URL isFileURL])
 873         [NSException raise:NSInvalidArgumentException format:@"%@ is not a file URL", URL];
 874
 875     if (![readAccessURL isFileURL])
 876         [NSException raise:NSInvalidArgumentException format:@"%@ is not a file URL", readAccessURL];
 877
 878     auto navigation = _page->loadFile([URL _web_originalDataAsWTFString], [readAccessURL _web_originalDataAsWTFString]);
 879     if (!navigation)
 880         return nil;
 881
 882     return [wrapper(*navigation.leakRef()) autorelease];
 883 }
 884
 885 - (WKNavigation *)loadHTMLString:(NSString *)string baseURL:(NSURL *)baseURL
 886 {
 887     NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
 888
 889     return [self loadData:data MIMEType:@"text/html" characterEncodingName:@"UTF-8" baseURL:baseURL];
 890 }
 891
 892 - (WKNavigation *)loadData:(NSData *)data MIMEType:(NSString *)MIMEType characterEncodingName:(NSString *)characterEncodingName baseURL:(NSURL *)baseURL
 893 {
 894     auto navigation = _page->loadData(API::Data::createWithoutCopying(data).ptr(), MIMEType, characterEncodingName, baseURL.absoluteString);
 895     if (!navigation)
 896         return nil;
 897
 898     return [wrapper(*navigation.leakRef()) autorelease];
 899 }
 900
 901 - (WKNavigation *)goToBackForwardListItem:(WKBackForwardListItem *)item
 902 {
 903     auto navigation = _page->goToBackForwardItem(&item._item);
 904     if (!navigation)
 905         return nil;
 906
 907     return [wrapper(*navigation.leakRef()) autorelease];
 908 }
 909
 910 - (NSString *)title
 911 {
 912     return _page->pageLoadState().title();
 913 }
 914
 915 - (NSURL *)URL
 916 {
 917     return [NSURL _web_URLWithWTFString:_page->pageLoadState().activeURL()];
 918 }
 919
 920 - (BOOL)isLoading
 921 {
 922     return _page->pageLoadState().isLoading();
 923 }
 924
 925 - (double)estimatedProgress
 926 {
 927     return _page->pageLoadState().estimatedProgress();
 928 }
 929
 930 - (BOOL)hasOnlySecureContent
 931 {
 932     return _page->pageLoadState().hasOnlySecureContent();
 933 }
 934
 935 - (SecTrustRef)serverTrust
 936 {
 937 #if HAVE(SEC_TRUST_SERIALIZATION)
 938     auto certificateInfo = _page->pageLoadState().certificateInfo();
 939     if (!certificateInfo)
 940         return nil;
 941
 942     return certificateInfo->certificateInfo().trust();
 943 #else
 944     return nil;
 945 #endif
 946 }
 947
 948 - (BOOL)canGoBack
 949 {
 950     return _page->pageLoadState().canGoBack();
 951 }
 952
 953 - (BOOL)canGoForward
 954 {
 955     return _page->pageLoadState().canGoForward();
 956 }
 957
 958 - (WKNavigation *)goBack
 959 {
 960     auto navigation = _page->goBack();
 961     if (!navigation)
 962         return nil;
 963
 964     return [wrapper(*navigation.leakRef()) autorelease];
 965 }
 966
 967 - (WKNavigation *)goForward
 968 {
 969     auto navigation = _page->goForward();
 970     if (!navigation)
 971         return nil;
 972
 973     return [wrapper(*navigation.leakRef()) autorelease];
 974 }
 975
 976 - (WKNavigation *)reload
 977 {
 978     OptionSet<WebCore::ReloadOption> reloadOptions;
 979     if (linkedOnOrAfter(WebKit::SDKVersion::FirstWithExpiredOnlyReloadBehavior))
 980         reloadOptions |= WebCore::ReloadOption::ExpiredOnly;
 981
 982     auto navigation = _page->reload(reloadOptions);
 983     if (!navigation)
 984         return nil;
 985
 986     return [wrapper(*navigation.leakRef()) autorelease];
 987 }
 988
 989 - (WKNavigation *)reloadFromOrigin
 990 {
 991     auto navigation = _page->reload(WebCore::ReloadOption::FromOrigin);
 992     if (!navigation)
 993         return nil;
 994
 995     return [wrapper(*navigation.leakRef()) autorelease];
 996 }
 997
 998 - (void)stopLoading
 999 {
1000     _page->stopLoading();
1001 }
1002
1003 static WKErrorCode callbackErrorCode(WebKit::CallbackBase::Error error)
1004 {
1005     switch (error) {
1006     case WebKit::CallbackBase::Error::None:
1007         ASSERT_NOT_REACHED();
1008         return WKErrorUnknown;
1009
1010     case WebKit::CallbackBase::Error::Unknown:
1011         return WKErrorUnknown;
1012
1013     case WebKit::CallbackBase::Error::ProcessExited:
1014         return WKErrorWebContentProcessTerminated;
1015
1016     case WebKit::CallbackBase::Error::OwnerWasInvalidated:
1017         return WKErrorWebViewInvalidated;
1018     }
1019 }
1020
1021 - (void)evaluateJavaScript:(NSString *)javaScriptString completionHandler:(void (^)(id, NSError *))completionHandler
1022 {
1023     [self _evaluateJavaScript:javaScriptString forceUserGesture:YES completionHandler:completionHandler];
1024 }
1025
1026 - (void)_evaluateJavaScript:(NSString *)javaScriptString forceUserGesture:(BOOL)forceUserGesture completionHandler:(void (^)(id, NSError *))completionHandler
1027 {
1028     auto handler = adoptNS([completionHandler copy]);
1029
1030     _page->runJavaScriptInMainFrame(javaScriptString, forceUserGesture, [handler](API::SerializedScriptValue* serializedScriptValue, bool hadException, const WebCore::ExceptionDetails& details, WebKit::ScriptValueCallback::Error errorCode) {
1031         if (!handler)
1032             return;
1033
1034         if (errorCode != WebKit::ScriptValueCallback::Error::None) {
1035             auto error = createNSError(callbackErrorCode(errorCode));
1036             if (errorCode == WebKit::ScriptValueCallback::Error::OwnerWasInvalidated) {
1037                 // The OwnerWasInvalidated callback is synchronous. We don't want to call the block from within it
1038                 // because that can trigger re-entrancy bugs in WebKit.
1039                 // FIXME: It would be even better if GenericCallback did this for us.
1040                 dispatch_async(dispatch_get_main_queue(), [handler, error] {
1041                     auto rawHandler = (void (^)(id, NSError *))handler.get();
1042                     rawHandler(nil, error.get());
1043                 });
1044                 return;
1045             }
1046
1047             auto rawHandler = (void (^)(id, NSError *))handler.get();
1048             rawHandler(nil, error.get());
1049             return;
1050         }
1051
1052         auto rawHandler = (void (^)(id, NSError *))handler.get();
1053         if (hadException) {
1054             ASSERT(!serializedScriptValue);
1055
1056             RetainPtr<NSMutableDictionary> userInfo = adoptNS([[NSMutableDictionary alloc] init]);
1057
1058             [userInfo setObject:localizedDescriptionForErrorCode(WKErrorJavaScriptExceptionOccurred) forKey:NSLocalizedDescriptionKey];
1059             [userInfo setObject:static_cast<NSString *>(details.message) forKey:_WKJavaScriptExceptionMessageErrorKey];
1060             [userInfo setObject:@(details.lineNumber) forKey:_WKJavaScriptExceptionLineNumberErrorKey];
1061             [userInfo setObject:@(details.columnNumber) forKey:_WKJavaScriptExceptionColumnNumberErrorKey];
1062
1063             if (!details.sourceURL.isEmpty())
1064                 [userInfo setObject:[NSURL _web_URLWithWTFString:details.sourceURL] forKey:_WKJavaScriptExceptionSourceURLErrorKey];
1065
1066             rawHandler(nil, adoptNS([[NSError alloc] initWithDomain:WKErrorDomain code:WKErrorJavaScriptExceptionOccurred userInfo:userInfo.get()]).get());
1067             return;
1068         }
1069
1070         if (!serializedScriptValue) {
1071             rawHandler(nil, createNSError(WKErrorJavaScriptResultTypeIsUnsupported).get());
1072             return;
1073         }
1074
1075         id body = API::SerializedScriptValue::deserialize(serializedScriptValue->internalRepresentation(), 0);
1076         rawHandler(body, nil);
1077     });
1078 }
1079
1080 #if PLATFORM(MAC)
1081 - (void)takeSnapshotWithConfiguration:(WKSnapshotConfiguration *)snapshotConfiguration completionHandler:(void(^)(NSImage *, NSError *))completionHandler
1082 {
1083     CGRect rectInViewCoordinates = snapshotConfiguration && !CGRectIsNull(snapshotConfiguration.rect) ? snapshotConfiguration.rect : self.bounds;
1084     CGFloat snapshotWidth;
1085     if (snapshotConfiguration)
1086         snapshotWidth = snapshotConfiguration.snapshotWidth.doubleValue ?: rectInViewCoordinates.size.width;
1087     else
1088         snapshotWidth = self.bounds.size.width;
1089
1090     auto handler = makeBlockPtr(completionHandler);
1091     CGFloat imageScale = snapshotWidth / rectInViewCoordinates.size.width;
1092     CGFloat imageHeight = imageScale * rectInViewCoordinates.size.height;
1093
1094     // Need to scale by device scale factor or the image will be distorted.
1095     CGFloat deviceScale = _page->deviceScaleFactor();
1096     WebCore::IntSize bitmapSize(snapshotWidth, imageHeight);
1097     bitmapSize.scale(deviceScale, deviceScale);
1098
1099     // Software snapshot will not capture elements rendered with hardware acceleration (WebGL, video, etc).
1100     _page->takeSnapshot(WebCore::enclosingIntRect(rectInViewCoordinates), bitmapSize, WebKit::SnapshotOptionsInViewCoordinates, [handler, snapshotWidth, imageHeight](const WebKit::ShareableBitmap::Handle& imageHandle, WebKit::CallbackBase::Error errorCode) {
1101         if (errorCode != WebKit::ScriptValueCallback::Error::None) {
1102             auto error = createNSError(callbackErrorCode(errorCode));
1103             handler(nil, error.get());
1104             return;
1105         }
1106
1107         RefPtr<WebKit::ShareableBitmap> bitmap = WebKit::ShareableBitmap::create(imageHandle, WebKit::SharedMemory::Protection::ReadOnly);
1108         RetainPtr<CGImageRef> cgImage = bitmap ? bitmap->makeCGImage() : nullptr;
1109         RetainPtr<NSImage> nsImage = adoptNS([[NSImage alloc] initWithCGImage:cgImage.get() size:NSMakeSize(snapshotWidth, imageHeight)]);
1110         handler(nsImage.get(), nil);
1111     });
1112 }
1113
1114 #elif PLATFORM(IOS)
1115 - (void)takeSnapshotWithConfiguration:(WKSnapshotConfiguration *)snapshotConfiguration completionHandler:(void(^)(UIImage *, NSError *))completionHandler
1116 {
1117     CGRect rectInViewCoordinates = snapshotConfiguration && !CGRectIsNull(snapshotConfiguration.rect) ? snapshotConfiguration.rect : self.bounds;
1118     CGFloat snapshotWidth;
1119     if (snapshotConfiguration)
1120         snapshotWidth = snapshotConfiguration.snapshotWidth.doubleValue ?: rectInViewCoordinates.size.width;
1121     else
1122         snapshotWidth = self.bounds.size.width;
1123
1124     auto handler = makeBlockPtr(completionHandler);
1125     CGFloat deviceScale = _page->deviceScaleFactor();
1126
1127     [self _snapshotRect:rectInViewCoordinates intoImageOfWidth:(snapshotWidth * deviceScale) completionHandler:^(CGImageRef snapshotImage) {
1128         RetainPtr<NSError> error;
1129         RetainPtr<UIImage> uiImage;
1130
1131         if (!snapshotImage)
1132             error = createNSError(WKErrorUnknown);
1133         else
1134             uiImage = adoptNS([[UIImage alloc] initWithCGImage:snapshotImage scale:deviceScale orientation:UIImageOrientationUp]);
1135
1136         handler(uiImage.get(), error.get());
1137     }];
1138 }
1139 #endif
1140
1141 - (NSString *)customUserAgent
1142 {
1143     return _page->customUserAgent();
1144 }
1145
1146 - (void)setCustomUserAgent:(NSString *)customUserAgent
1147 {
1148     _page->setCustomUserAgent(customUserAgent);
1149 }
1150
1151 - (WKPageRef)_pageForTesting
1152 {
1153     return toAPI(_page.get());
1154 }
1155
1156 - (WebKit::WebPageProxy *)_page
1157 {
1158     return _page.get();
1159 }
1160
1161 - (BOOL)allowsLinkPreview
1162 {
1163 #if PLATFORM(MAC)
1164     return _impl->allowsLinkPreview();
1165 #elif PLATFORM(IOS)
1166     return _allowsLinkPreview;
1167 #endif
1168 }
1169
1170 - (void)setAllowsLinkPreview:(BOOL)allowsLinkPreview
1171 {
1172 #if PLATFORM(MAC)
1173     _impl->setAllowsLinkPreview(allowsLinkPreview);
1174     return;
1175 #elif PLATFORM(IOS)
1176     if (_allowsLinkPreview == allowsLinkPreview)
1177         return;
1178
1179     _allowsLinkPreview = allowsLinkPreview;
1180
1181 #if HAVE(LINK_PREVIEW)
1182     if (_allowsLinkPreview)
1183         [_contentView _registerPreview];
1184     else
1185         [_contentView _unregisterPreview];
1186 #endif // HAVE(LINK_PREVIEW)
1187 #endif // PLATFORM(IOS)
1188 }
1189
1190 - (CGSize)_viewportSizeForCSSViewportUnits
1191 {
1192     return _page->viewportSizeForCSSViewportUnits();
1193 }
1194
1195 - (void)_setViewportSizeForCSSViewportUnits:(CGSize)viewportSize
1196 {
1197     auto viewportSizeForViewportUnits = WebCore::IntSize(viewportSize);
1198     if (viewportSizeForViewportUnits.isEmpty())
1199         [NSException raise:NSInvalidArgumentException format:@"Viewport size should not be empty"];
1200
1201     _page->setViewportSizeForCSSViewportUnits(viewportSizeForViewportUnits);
1202 }
1203
1204 static NSTextAlignment nsTextAlignment(WebKit::TextAlignment alignment)
1205 {
1206     switch (alignment) {
1207     case WebKit::NoAlignment:
1208         return NSTextAlignmentNatural;
1209     case WebKit::LeftAlignment:
1210         return NSTextAlignmentLeft;
1211     case WebKit::RightAlignment:
1212         return NSTextAlignmentRight;
1213     case WebKit::CenterAlignment:
1214         return NSTextAlignmentCenter;
1215     case WebKit::JustifiedAlignment:
1216         return NSTextAlignmentJustified;
1217     }
1218     ASSERT_NOT_REACHED();
1219     return NSTextAlignmentNatural;
1220 }
1221
1222 static NSDictionary *dictionaryRepresentationForEditorState(const WebKit::EditorState& state)
1223 {
1224     if (state.isMissingPostLayoutData)
1225         return @{ @"post-layout-data" : @NO };
1226
1227     auto& postLayoutData = state.postLayoutData();
1228     return @{
1229         @"post-layout-data" : @YES,
1230         @"bold": postLayoutData.typingAttributes & WebKit::AttributeBold ? @YES : @NO,
1231         @"italic": postLayoutData.typingAttributes & WebKit::AttributeItalics ? @YES : @NO,
1232         @"underline": postLayoutData.typingAttributes & WebKit::AttributeUnderline ? @YES : @NO,
1233         @"text-alignment": @(nsTextAlignment(static_cast<WebKit::TextAlignment>(postLayoutData.textAlignment))),
1234         @"text-color": (NSString *)postLayoutData.textColor.cssText()
1235     };
1236 }
1237
1238 - (void)_didChangeEditorState
1239 {
1240     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)self.UIDelegate;
1241     if ([uiDelegate respondsToSelector:@selector(_webView:editorStateDidChange:)])
1242         [uiDelegate _webView:self editorStateDidChange:dictionaryRepresentationForEditorState(_page->editorState())];
1243 }
1244
1245 #if ENABLE(ATTACHMENT_ELEMENT)
1246
1247 - (void)_didInsertAttachment:(NSString *)identifier withSource:(NSString *)source
1248 {
1249     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)self.UIDelegate;
1250     if ([uiDelegate respondsToSelector:@selector(_webView:didInsertAttachment:withSource:)])
1251         [uiDelegate _webView:self didInsertAttachment:[wrapper(API::Attachment::create(identifier, *_page).leakRef()) autorelease] withSource:source];
1252     else if ([uiDelegate respondsToSelector:@selector(_webView:didInsertAttachment:)])
1253         [uiDelegate _webView:self didInsertAttachment:[wrapper(API::Attachment::create(identifier, *_page).leakRef()) autorelease]];
1254 }
1255
1256 - (void)_didRemoveAttachment:(NSString *)identifier
1257 {
1258     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)self.UIDelegate;
1259     if ([uiDelegate respondsToSelector:@selector(_webView:didRemoveAttachment:)])
1260         [uiDelegate _webView:self didRemoveAttachment:[wrapper(API::Attachment::create(identifier, *_page).leakRef()) autorelease]];
1261 }
1262
1263 #endif // ENABLE(ATTACHMENT_ELEMENT)
1264
1265 #pragma mark iOS-specific methods
1266
1267 #if PLATFORM(IOS)
1268
1269 - (_WKDragInteractionPolicy)_dragInteractionPolicy
1270 {
1271     return _dragInteractionPolicy;
1272 }
1273
1274 - (void)_setDragInteractionPolicy:(_WKDragInteractionPolicy)policy
1275 {
1276     if (_dragInteractionPolicy == policy)
1277         return;
1278
1279     _dragInteractionPolicy = policy;
1280 #if ENABLE(DRAG_SUPPORT)
1281     [_contentView _didChangeDragInteractionPolicy];
1282 #endif
1283 }
1284
1285 - (void)_populateArchivedSubviews:(NSMutableSet *)encodedViews
1286 {
1287     [super _populateArchivedSubviews:encodedViews];
1288
1289     if (_scrollView)
1290         [encodedViews removeObject:_scrollView.get()];
1291     if (_customContentFixedOverlayView)
1292         [encodedViews removeObject:_customContentFixedOverlayView.get()];
1293 }
1294
1295 - (BOOL)_isBackground
1296 {
1297     if ([self _isDisplayingPDF])
1298         return [(WKPDFView *)_customContentView isBackground];
1299
1300     return [_contentView isBackground];
1301 }
1302
1303 - (void)setFrame:(CGRect)frame
1304 {
1305     CGRect oldFrame = self.frame;
1306     [super setFrame:frame];
1307
1308     if (!CGSizeEqualToSize(oldFrame.size, frame.size))
1309         [self _frameOrBoundsChanged];
1310 }
1311
1312 - (void)setBounds:(CGRect)bounds
1313 {
1314     CGRect oldBounds = self.bounds;
1315     [super setBounds:bounds];
1316     [_customContentFixedOverlayView setFrame:self.bounds];
1317
1318     if (!CGSizeEqualToSize(oldBounds.size, bounds.size))
1319         [self _frameOrBoundsChanged];
1320 }
1321
1322 - (void)layoutSubviews
1323 {
1324     [super layoutSubviews];
1325     [self _frameOrBoundsChanged];
1326 }
1327
1328 - (UIScrollView *)scrollView
1329 {
1330     return _scrollView.get();
1331 }
1332
1333 - (WKBrowsingContextController *)browsingContextController
1334 {
1335     return [_contentView browsingContextController];
1336 }
1337
1338 - (BOOL)becomeFirstResponder
1339 {
1340     UIView *currentContentView = self._currentContentView;
1341     if (currentContentView == _contentView && [_contentView superview])
1342         return [_contentView becomeFirstResponderForWebView] || [super becomeFirstResponder];
1343
1344     return [currentContentView becomeFirstResponder] || [super becomeFirstResponder];
1345 }
1346
1347 - (BOOL)canBecomeFirstResponder
1348 {
1349     if (self._currentContentView == _contentView)
1350         return [_contentView canBecomeFirstResponderForWebView];
1351
1352     return YES;
1353 }
1354
1355 - (BOOL)resignFirstResponder
1356 {
1357     if ([_contentView isFirstResponder])
1358         return [_contentView resignFirstResponderForWebView];
1359
1360     return [super resignFirstResponder];
1361 }
1362
1363 #define FORWARD_ACTION_TO_WKCONTENTVIEW(_action) \
1364     - (void)_action:(id)sender \
1365     { \
1366         if (self.usesStandardContentView) \
1367             [_contentView _action ## ForWebView:sender]; \
1368     }
1369
1370 FOR_EACH_WKCONTENTVIEW_ACTION(FORWARD_ACTION_TO_WKCONTENTVIEW)
1371
1372 #undef FORWARD_ACTION_TO_WKCONTENTVIEW
1373
1374 - (BOOL)canPerformAction:(SEL)action withSender:(id)sender
1375 {
1376     #define FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW(_action) \
1377         if (action == @selector(_action:)) \
1378             return self.usesStandardContentView && [_contentView canPerformActionForWebView:action withSender:sender];
1379
1380     FOR_EACH_WKCONTENTVIEW_ACTION(FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW)
1381
1382     #undef FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW
1383
1384     return [super canPerformAction:action withSender:sender];
1385 }
1386
1387 - (id)targetForAction:(SEL)action withSender:(id)sender
1388 {
1389     #define FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW(_action) \
1390         if (action == @selector(_action:) && self.usesStandardContentView) \
1391             return [_contentView targetForActionForWebView:action withSender:sender];
1392
1393     FOR_EACH_WKCONTENTVIEW_ACTION(FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW)
1394
1395     #undef FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW
1396
1397     return [super targetForAction:action withSender:sender];
1398 }
1399
1400 static inline CGFloat floorToDevicePixel(CGFloat input, float deviceScaleFactor)
1401 {
1402     return CGFloor(input * deviceScaleFactor) / deviceScaleFactor;
1403 }
1404
1405 static inline bool pointsEqualInDevicePixels(CGPoint a, CGPoint b, float deviceScaleFactor)
1406 {
1407     return fabs(a.x * deviceScaleFactor - b.x * deviceScaleFactor) < std::numeric_limits<float>::epsilon()
1408         && fabs(a.y * deviceScaleFactor - b.y * deviceScaleFactor) < std::numeric_limits<float>::epsilon();
1409 }
1410
1411 static CGSize roundScrollViewContentSize(const WebKit::WebPageProxy& page, CGSize contentSize)
1412 {
1413     float deviceScaleFactor = page.deviceScaleFactor();
1414     return CGSizeMake(floorToDevicePixel(contentSize.width, deviceScaleFactor), floorToDevicePixel(contentSize.height, deviceScaleFactor));
1415 }
1416
1417 - (UIView *)_currentContentView
1418 {
1419     return _customContentView ? _customContentView.get() : _contentView.get();
1420 }
1421
1422 - (WKWebViewContentProviderRegistry *)_contentProviderRegistry
1423 {
1424     return [_configuration _contentProviderRegistry];
1425 }
1426
1427 - (WKSelectionGranularity)_selectionGranularity
1428 {
1429     return [_configuration selectionGranularity];
1430 }
1431
1432 - (void)_setHasCustomContentView:(BOOL)pageHasCustomContentView loadedMIMEType:(const WTF::String&)mimeType
1433 {
1434     if (pageHasCustomContentView) {
1435         [_customContentView removeFromSuperview];
1436         [_customContentFixedOverlayView removeFromSuperview];
1437
1438         Class representationClass = [[_configuration _contentProviderRegistry] providerForMIMEType:mimeType];
1439         ASSERT(representationClass);
1440         _customContentView = adoptNS([[representationClass alloc] web_initWithFrame:self.bounds webView:self]);
1441         _customContentFixedOverlayView = adoptNS([[UIView alloc] initWithFrame:self.bounds]);
1442         [_customContentFixedOverlayView layer].name = @"CustomContentFixedOverlay";
1443         [_customContentFixedOverlayView setUserInteractionEnabled:NO];
1444
1445         [[_contentView unscaledView] removeFromSuperview];
1446         [_contentView removeFromSuperview];
1447         [_scrollView addSubview:_customContentView.get()];
1448         [self addSubview:_customContentFixedOverlayView.get()];
1449
1450         [_customContentView web_setMinimumSize:self.bounds.size];
1451         [_customContentView web_setFixedOverlayView:_customContentFixedOverlayView.get()];
1452
1453         _scrollViewBackgroundColor = WebCore::Color();
1454         [_scrollView setContentOffset:[self _adjustedContentOffset:CGPointZero]];
1455
1456         [self _setAvoidsUnsafeArea:NO];
1457     } else if (_customContentView) {
1458         [_customContentView removeFromSuperview];
1459         _customContentView = nullptr;
1460
1461         [_customContentFixedOverlayView removeFromSuperview];
1462         _customContentFixedOverlayView = nullptr;
1463
1464         [_scrollView addSubview:_contentView.get()];
1465         [_scrollView addSubview:[_contentView unscaledView]];
1466         [_scrollView setContentSize:roundScrollViewContentSize(*_page, [_contentView frame].size)];
1467
1468         [_customContentFixedOverlayView setFrame:self.bounds];
1469         [self addSubview:_customContentFixedOverlayView.get()];
1470     }
1471
1472     if (self.isFirstResponder) {
1473         UIView *currentContentView = self._currentContentView;
1474         if (currentContentView == _contentView ? [_contentView canBecomeFirstResponderForWebView] : currentContentView.canBecomeFirstResponder)
1475             [currentContentView becomeFirstResponder];
1476     }
1477 }
1478
1479 - (void)_didFinishLoadingDataForCustomContentProviderWithSuggestedFilename:(const String&)suggestedFilename data:(NSData *)data
1480 {
1481     ASSERT(_customContentView);
1482     [_customContentView web_setContentProviderData:data suggestedFilename:suggestedFilename];
1483
1484     // FIXME: It may make more sense for custom content providers to invoke this when they're ready,
1485     // because there's no guarantee that all custom content providers will lay out synchronously.
1486     _page->didLayoutForCustomContentProvider();
1487 }
1488
1489 - (void)_willInvokeUIScrollViewDelegateCallback
1490 {
1491     _delayUpdateVisibleContentRects = YES;
1492 }
1493
1494 - (void)_didInvokeUIScrollViewDelegateCallback
1495 {
1496     _delayUpdateVisibleContentRects = NO;
1497     if (_hadDelayedUpdateVisibleContentRects) {
1498         _hadDelayedUpdateVisibleContentRects = NO;
1499         [self _scheduleVisibleContentRectUpdate];
1500     }
1501 }
1502
1503 static CGFloat contentZoomScale(WKWebView *webView)
1504 {
1505     CGFloat scale = webView._currentContentView.layer.affineTransform.a;
1506     ASSERT(scale == [webView->_scrollView zoomScale]);
1507     return scale;
1508 }
1509
1510 static WebCore::Color baseScrollViewBackgroundColor(WKWebView *webView)
1511 {
1512     if (webView->_customContentView)
1513         return [webView->_customContentView backgroundColor].CGColor;
1514
1515     if (webView->_gestureController) {
1516         WebCore::Color color = webView->_gestureController->backgroundColorForCurrentSnapshot();
1517         if (color.isValid())
1518             return color;
1519     }
1520
1521     return webView->_page->pageExtendedBackgroundColor();
1522 }
1523
1524 static WebCore::Color scrollViewBackgroundColor(WKWebView *webView)
1525 {
1526     if (!webView.opaque)
1527         return WebCore::Color::transparent;
1528
1529     WebCore::Color color = baseScrollViewBackgroundColor(webView);
1530
1531     if (!color.isValid())
1532         color = WebCore::Color::white;
1533
1534     CGFloat zoomScale = contentZoomScale(webView);
1535     CGFloat minimumZoomScale = [webView->_scrollView minimumZoomScale];
1536     if (zoomScale < minimumZoomScale) {
1537         CGFloat slope = 12;
1538         CGFloat opacity = std::max<CGFloat>(1 - slope * (minimumZoomScale - zoomScale), 0);
1539         color = WebCore::colorWithOverrideAlpha(color.rgb(), opacity);
1540     }
1541
1542     return color;
1543 }
1544
1545 - (void)_updateScrollViewBackground
1546 {
1547     WebCore::Color color = scrollViewBackgroundColor(self);
1548
1549     if (_scrollViewBackgroundColor == color)
1550         return;
1551
1552     _scrollViewBackgroundColor = color;
1553
1554     auto uiBackgroundColor = adoptNS([[UIColor alloc] initWithCGColor:cachedCGColor(color)]);
1555     [_scrollView setBackgroundColor:uiBackgroundColor.get()];
1556
1557     // Update the indicator style based on the lightness/darkness of the background color.
1558     double hue, saturation, lightness;
1559     color.getHSL(hue, saturation, lightness);
1560     if (lightness <= .5 && color.isVisible())
1561         [_scrollView setIndicatorStyle:UIScrollViewIndicatorStyleWhite];
1562     else
1563         [_scrollView setIndicatorStyle:UIScrollViewIndicatorStyleDefault];
1564 }
1565
1566 - (CGPoint)_adjustedContentOffset:(CGPoint)point
1567 {
1568     CGPoint result = point;
1569     UIEdgeInsets contentInset = [self _computedContentInset];
1570
1571     result.x -= contentInset.left;
1572     result.y -= contentInset.top;
1573
1574     return result;
1575 }
1576
1577 - (UIRectEdge)_effectiveObscuredInsetEdgesAffectedBySafeArea
1578 {
1579     if (![self usesStandardContentView])
1580         return UIRectEdgeAll;
1581     return _obscuredInsetEdgesAffectedBySafeArea;
1582 }
1583
1584 - (UIEdgeInsets)_computedContentInset
1585 {
1586     if (_haveSetObscuredInsets)
1587         return _obscuredInsets;
1588
1589     UIEdgeInsets insets = [_scrollView contentInset];
1590
1591 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
1592     if (self._safeAreaShouldAffectObscuredInsets)
1593         insets = UIEdgeInsetsAdd(insets, self._scrollViewSystemContentInset, self._effectiveObscuredInsetEdgesAffectedBySafeArea);
1594 #endif
1595
1596     return insets;
1597 }
1598
1599 - (UIEdgeInsets)_computedUnobscuredSafeAreaInset
1600 {
1601     if (_haveSetUnobscuredSafeAreaInsets)
1602         return _unobscuredSafeAreaInsets;
1603
1604 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
1605     if (!self._safeAreaShouldAffectObscuredInsets)
1606         return self.safeAreaInsets;
1607 #endif
1608
1609     return UIEdgeInsetsZero;
1610 }
1611
1612 - (void)_processDidExit
1613 {
1614     [self _hidePasswordView];
1615     if (!_customContentView && _dynamicViewportUpdateMode != DynamicViewportUpdateMode::NotResizing) {
1616         NSUInteger indexOfResizeAnimationView = [[_scrollView subviews] indexOfObject:_resizeAnimationView.get()];
1617         [_scrollView insertSubview:_contentView.get() atIndex:indexOfResizeAnimationView];
1618         [_scrollView insertSubview:[_contentView unscaledView] atIndex:indexOfResizeAnimationView + 1];
1619         [_resizeAnimationView removeFromSuperview];
1620         _resizeAnimationView = nil;
1621
1622         _resizeAnimationTransformAdjustments = CATransform3DIdentity;
1623     }
1624     [_contentView setFrame:self.bounds];
1625     [_scrollView setBackgroundColor:[UIColor whiteColor]];
1626     [_scrollView setContentOffset:[self _adjustedContentOffset:CGPointZero]];
1627     [_scrollView setZoomScale:1];
1628
1629     _viewportMetaTagWidth = WebCore::ViewportArguments::ValueAuto;
1630     _initialScaleFactor = 1;
1631     _hasCommittedLoadForMainFrame = NO;
1632     _needsResetViewStateAfterCommitLoadForMainFrame = NO;
1633     _dynamicViewportUpdateMode = DynamicViewportUpdateMode::NotResizing;
1634     [_contentView setHidden:NO];
1635     _scrollOffsetToRestore = std::nullopt;
1636     _unobscuredCenterToRestore = std::nullopt;
1637     _scrollViewBackgroundColor = WebCore::Color();
1638     _delayUpdateVisibleContentRects = NO;
1639     _hadDelayedUpdateVisibleContentRects = NO;
1640     _lastSentMinimumLayoutSize = std::nullopt;
1641     _lastSentMaximumUnobscuredSize = std::nullopt;
1642     _lastSentDeviceOrientation = std::nullopt;
1643
1644     _frozenVisibleContentRect = std::nullopt;
1645     _frozenUnobscuredContentRect = std::nullopt;
1646
1647     _firstPaintAfterCommitLoadTransactionID = 0;
1648     _firstTransactionIDAfterPageRestore = std::nullopt;
1649     _resizeAnimationTransformTransactionID = std::nullopt;
1650
1651     _hasScheduledVisibleRectUpdate = NO;
1652     _commitDidRestoreScrollPosition = NO;
1653
1654     _avoidsUnsafeArea = YES;
1655 }
1656
1657 - (void)_didCommitLoadForMainFrame
1658 {
1659     _firstPaintAfterCommitLoadTransactionID = downcast<WebKit::RemoteLayerTreeDrawingAreaProxy>(*_page->drawingArea()).nextLayerTreeTransactionID();
1660
1661     _hasCommittedLoadForMainFrame = YES;
1662     _needsResetViewStateAfterCommitLoadForMainFrame = YES;
1663
1664     [_scrollView _stopScrollingAndZoomingAnimations];
1665 }
1666
1667 static CGPoint contentOffsetBoundedInValidRange(UIScrollView *scrollView, CGPoint contentOffset)
1668 {
1669 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
1670     UIEdgeInsets contentInsets = scrollView.adjustedContentInset;
1671 #else
1672     UIEdgeInsets contentInsets = scrollView.contentInset;
1673 #endif
1674
1675     CGSize contentSize = scrollView.contentSize;
1676     CGSize scrollViewSize = scrollView.bounds.size;
1677
1678     CGPoint minimumContentOffset = CGPointMake(-contentInsets.left, -contentInsets.top);
1679     CGPoint maximumContentOffset = CGPointMake(std::max(minimumContentOffset.x, contentSize.width + contentInsets.right - scrollViewSize.width), std::max(minimumContentOffset.y, contentSize.height + contentInsets.bottom - scrollViewSize.height));
1680
1681     return CGPointMake(std::max(std::min(contentOffset.x, maximumContentOffset.x), minimumContentOffset.x), std::max(std::min(contentOffset.y, maximumContentOffset.y), minimumContentOffset.y));
1682 }
1683
1684 static void changeContentOffsetBoundedInValidRange(UIScrollView *scrollView, WebCore::FloatPoint contentOffset)
1685 {
1686     scrollView.contentOffset = contentOffsetBoundedInValidRange(scrollView, contentOffset);
1687 }
1688
1689 - (WebCore::FloatRect)visibleRectInViewCoordinates
1690 {
1691     WebCore::FloatRect bounds = self.bounds;
1692     bounds.moveBy([_scrollView contentOffset]);
1693     WebCore::FloatRect contentViewBounds = [_contentView bounds];
1694     bounds.intersect(contentViewBounds);
1695     return bounds;
1696 }
1697
1698 // WebCore stores the page scale factor as float instead of double. When we get a scale from WebCore,
1699 // we need to ignore differences that are within a small rounding error on floats.
1700 static inline bool areEssentiallyEqualAsFloat(float a, float b)
1701 {
1702     return WTF::areEssentiallyEqual(a, b);
1703 }
1704
1705 - (void)_didCommitLayerTree:(const WebKit::RemoteLayerTreeTransaction&)layerTreeTransaction
1706 {
1707     if (![self usesStandardContentView])
1708         return;
1709
1710     LOG_WITH_STREAM(VisibleRects, stream << "-[WKWebView " << _page->pageID() << " _didCommitLayerTree:] transactionID " <<  layerTreeTransaction.transactionID() << " _dynamicViewportUpdateMode " << (int)_dynamicViewportUpdateMode);
1711
1712     bool needUpdateVisibleContentRects = _page->updateLayoutViewportParameters(layerTreeTransaction);
1713
1714     if (_dynamicViewportUpdateMode != DynamicViewportUpdateMode::NotResizing) {
1715         if (_resizeAnimationTransformTransactionID && layerTreeTransaction.transactionID() >= _resizeAnimationTransformTransactionID.value()) {
1716             _resizeAnimationTransformTransactionID = std::nullopt;
1717             [_resizeAnimationView layer].sublayerTransform = _resizeAnimationTransformAdjustments;
1718             if (_dynamicViewportUpdateMode == DynamicViewportUpdateMode::ResizingWithDocumentHidden) {
1719                 [_contentView setHidden:NO];
1720                 [self _endAnimatedResize];
1721             }
1722         }
1723         return;
1724     }
1725
1726     if (_activeAnimatedResizeCount)
1727         RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _didCommitLayerTree:] - %d animated resizes in flight", self, _activeAnimatedResizeCount);
1728
1729     CGSize newContentSize = roundScrollViewContentSize(*_page, [_contentView frame].size);
1730     [_scrollView _setContentSizePreservingContentOffsetDuringRubberband:newContentSize];
1731
1732     [_scrollView setMinimumZoomScale:layerTreeTransaction.minimumScaleFactor()];
1733     [_scrollView setMaximumZoomScale:layerTreeTransaction.maximumScaleFactor()];
1734     [_scrollView setZoomEnabled:layerTreeTransaction.allowsUserScaling()];
1735     if (!layerTreeTransaction.scaleWasSetByUIProcess() && ![_scrollView isZooming] && ![_scrollView isZoomBouncing] && ![_scrollView _isAnimatingZoom] && [_scrollView zoomScale] != layerTreeTransaction.pageScaleFactor()) {
1736         LOG_WITH_STREAM(VisibleRects, stream << " updating scroll view with pageScaleFactor " << layerTreeTransaction.pageScaleFactor());
1737         [_scrollView setZoomScale:layerTreeTransaction.pageScaleFactor()];
1738     }
1739
1740     _viewportMetaTagWidth = layerTreeTransaction.viewportMetaTagWidth();
1741     _viewportMetaTagWidthWasExplicit = layerTreeTransaction.viewportMetaTagWidthWasExplicit();
1742     _viewportMetaTagCameFromImageDocument = layerTreeTransaction.viewportMetaTagCameFromImageDocument();
1743     _initialScaleFactor = layerTreeTransaction.initialScaleFactor();
1744     if (_page->inStableState() && layerTreeTransaction.isInStableState() && [_stableStatePresentationUpdateCallbacks count]) {
1745         for (dispatch_block_t action in _stableStatePresentationUpdateCallbacks.get())
1746             action();
1747
1748         [_stableStatePresentationUpdateCallbacks removeAllObjects];
1749         _stableStatePresentationUpdateCallbacks = nil;
1750     }
1751
1752     if (![_contentView _mayDisableDoubleTapGesturesDuringSingleTap])
1753         [_contentView _setDoubleTapGesturesEnabled:self._allowsDoubleTapGestures];
1754
1755     [self _updateScrollViewBackground];
1756     [self _setAvoidsUnsafeArea:layerTreeTransaction.avoidsUnsafeArea()];
1757
1758     if (_gestureController)
1759         _gestureController->setRenderTreeSize(layerTreeTransaction.renderTreeSize());
1760
1761     if (_needsResetViewStateAfterCommitLoadForMainFrame && layerTreeTransaction.transactionID() >= _firstPaintAfterCommitLoadTransactionID) {
1762         _needsResetViewStateAfterCommitLoadForMainFrame = NO;
1763         [_scrollView setContentOffset:[self _adjustedContentOffset:CGPointZero]];
1764         if (_observedRenderingProgressEvents & _WKRenderingProgressEventFirstPaint)
1765             _navigationState->didFirstPaint();
1766
1767         needUpdateVisibleContentRects = true;
1768     }
1769
1770     if (_firstTransactionIDAfterPageRestore && layerTreeTransaction.transactionID() >= _firstTransactionIDAfterPageRestore.value()) {
1771         if (_scrollOffsetToRestore) {
1772             WebCore::FloatPoint scaledScrollOffset = _scrollOffsetToRestore.value();
1773             _scrollOffsetToRestore = std::nullopt;
1774
1775             if (areEssentiallyEqualAsFloat(contentZoomScale(self), _scaleToRestore)) {
1776                 scaledScrollOffset.scale(_scaleToRestore);
1777                 WebCore::FloatPoint contentOffsetInScrollViewCoordinates = scaledScrollOffset - WebCore::FloatSize(_obscuredInsetsWhenSaved.left(), _obscuredInsetsWhenSaved.top());
1778
1779                 changeContentOffsetBoundedInValidRange(_scrollView.get(), contentOffsetInScrollViewCoordinates);
1780                 _commitDidRestoreScrollPosition = YES;
1781             }
1782
1783             needUpdateVisibleContentRects = true;
1784         }
1785
1786         if (_unobscuredCenterToRestore) {
1787             WebCore::FloatPoint unobscuredCenterToRestore = _unobscuredCenterToRestore.value();
1788             _unobscuredCenterToRestore = std::nullopt;
1789
1790             if (areEssentiallyEqualAsFloat(contentZoomScale(self), _scaleToRestore)) {
1791                 CGRect unobscuredRect = UIEdgeInsetsInsetRect(self.bounds, _obscuredInsets);
1792                 WebCore::FloatSize unobscuredContentSizeAtNewScale = WebCore::FloatSize(unobscuredRect.size) / _scaleToRestore;
1793                 WebCore::FloatPoint topLeftInDocumentCoordinates = unobscuredCenterToRestore - unobscuredContentSizeAtNewScale / 2;
1794
1795                 topLeftInDocumentCoordinates.scale(_scaleToRestore);
1796                 topLeftInDocumentCoordinates.moveBy(WebCore::FloatPoint(-_obscuredInsets.left, -_obscuredInsets.top));
1797
1798                 changeContentOffsetBoundedInValidRange(_scrollView.get(), topLeftInDocumentCoordinates);
1799             }
1800
1801             needUpdateVisibleContentRects = true;
1802         }
1803
1804         if (_gestureController)
1805             _gestureController->didRestoreScrollPosition();
1806
1807         _firstTransactionIDAfterPageRestore = std::nullopt;
1808     }
1809
1810     if (needUpdateVisibleContentRects)
1811         [self _scheduleVisibleContentRectUpdate];
1812
1813     if (WebKit::RemoteLayerTreeScrollingPerformanceData* scrollPerfData = _page->scrollingPerformanceData())
1814         scrollPerfData->didCommitLayerTree([self visibleRectInViewCoordinates]);
1815 }
1816
1817 - (void)_layerTreeCommitComplete
1818 {
1819     _commitDidRestoreScrollPosition = NO;
1820 }
1821
1822 - (void)_dynamicViewportUpdateChangedTargetToScale:(double)newScale position:(CGPoint)newScrollPosition nextValidLayerTreeTransactionID:(uint64_t)nextValidLayerTreeTransactionID
1823 {
1824     LOG_WITH_STREAM(VisibleRects, stream << "-[WKWebView " << _page->pageID() << " _dynamicViewportUpdateChangedTargetToScale:] " <<  newScale << " _dynamicViewportUpdateMode " << (int)_dynamicViewportUpdateMode);
1825
1826     if (_dynamicViewportUpdateMode != DynamicViewportUpdateMode::NotResizing) {
1827         CGFloat animatingScaleTarget = [[_resizeAnimationView layer] transform].m11;
1828         double currentTargetScale = animatingScaleTarget * [[_contentView layer] transform].m11;
1829         double scale = newScale / currentTargetScale;
1830         _resizeAnimationTransformAdjustments = CATransform3DMakeScale(scale, scale, 1);
1831
1832         CGPoint newContentOffset = [self _adjustedContentOffset:CGPointMake(newScrollPosition.x * newScale, newScrollPosition.y * newScale)];
1833         CGPoint currentContentOffset = [_scrollView contentOffset];
1834
1835         _resizeAnimationTransformAdjustments.m41 = (currentContentOffset.x - newContentOffset.x) / animatingScaleTarget;
1836         _resizeAnimationTransformAdjustments.m42 = (currentContentOffset.y - newContentOffset.y) / animatingScaleTarget;
1837         _resizeAnimationTransformTransactionID = nextValidLayerTreeTransactionID;
1838     }
1839 }
1840
1841 - (void)_couldNotRestorePageState
1842 {
1843     // The gestureController may be waiting for the scroll position to be restored
1844     // in order to remove the swipe snapshot. Since the scroll position could not be
1845     // restored, tell the gestureController it was restored so that it no longer waits
1846     // for it.
1847     if (_gestureController)
1848         _gestureController->didRestoreScrollPosition();
1849 }
1850
1851 - (void)_restorePageScrollPosition:(std::optional<WebCore::FloatPoint>)scrollPosition scrollOrigin:(WebCore::FloatPoint)scrollOrigin previousObscuredInset:(WebCore::FloatBoxExtent)obscuredInsets scale:(double)scale
1852 {
1853     if (_dynamicViewportUpdateMode != DynamicViewportUpdateMode::NotResizing)
1854         return;
1855
1856     if (![self usesStandardContentView])
1857         return;
1858
1859     _firstTransactionIDAfterPageRestore = downcast<WebKit::RemoteLayerTreeDrawingAreaProxy>(*_page->drawingArea()).nextLayerTreeTransactionID();
1860     if (scrollPosition)
1861         _scrollOffsetToRestore = WebCore::ScrollableArea::scrollOffsetFromPosition(WebCore::FloatPoint(scrollPosition.value()), WebCore::toFloatSize(scrollOrigin));
1862     else
1863         _scrollOffsetToRestore = std::nullopt;
1864
1865     _obscuredInsetsWhenSaved = obscuredInsets;
1866     _scaleToRestore = scale;
1867 }
1868
1869 - (void)_restorePageStateToUnobscuredCenter:(std::optional<WebCore::FloatPoint>)center scale:(double)scale
1870 {
1871     if (_dynamicViewportUpdateMode != DynamicViewportUpdateMode::NotResizing)
1872         return;
1873
1874     if (![self usesStandardContentView])
1875         return;
1876
1877     _firstTransactionIDAfterPageRestore = downcast<WebKit::RemoteLayerTreeDrawingAreaProxy>(*_page->drawingArea()).nextLayerTreeTransactionID();
1878     _unobscuredCenterToRestore = center.value();
1879
1880     _scaleToRestore = scale;
1881 }
1882
1883 - (RefPtr<WebKit::ViewSnapshot>)_takeViewSnapshot
1884 {
1885     float deviceScale = WebCore::screenScaleFactor();
1886     WebCore::FloatSize snapshotSize(self.bounds.size);
1887     snapshotSize.scale(deviceScale);
1888
1889     CATransform3D transform = CATransform3DMakeScale(deviceScale, deviceScale, 1);
1890
1891 #if HAVE(IOSURFACE)
1892     WebCore::IOSurface::Format snapshotFormat = WebCore::screenSupportsExtendedColor() ? WebCore::IOSurface::Format::RGB10 : WebCore::IOSurface::Format::RGBA;
1893     auto surface = WebCore::IOSurface::create(WebCore::expandedIntSize(snapshotSize), WebCore::sRGBColorSpaceRef(), snapshotFormat);
1894     if (!surface)
1895         return nullptr;
1896     CARenderServerRenderLayerWithTransform(MACH_PORT_NULL, self.layer.context.contextId, reinterpret_cast<uint64_t>(self.layer), surface->surface(), 0, 0, &transform);
1897
1898 #if HAVE(IOSURFACE_ACCELERATOR)
1899     WebCore::IOSurface::Format compressedFormat = WebCore::IOSurface::Format::YUV422;
1900     if (WebCore::IOSurface::allowConversionFromFormatToFormat(snapshotFormat, compressedFormat)) {
1901         RefPtr<WebKit::ViewSnapshot> viewSnapshot = WebKit::ViewSnapshot::create(nullptr);
1902         WebCore::IOSurface::convertToFormat(WTFMove(surface), WebCore::IOSurface::Format::YUV422, [viewSnapshot](std::unique_ptr<WebCore::IOSurface> convertedSurface) {
1903             if (convertedSurface)
1904                 viewSnapshot->setSurface(WTFMove(convertedSurface));
1905         });
1906
1907         return viewSnapshot;
1908     }
1909 #endif // HAVE(IOSURFACE_ACCELERATOR)
1910
1911     return WebKit::ViewSnapshot::create(WTFMove(surface));
1912 #else // HAVE(IOSURFACE)
1913     uint32_t slotID = [WebKit::ViewSnapshotStore::snapshottingContext() createImageSlot:snapshotSize hasAlpha:YES];
1914
1915     if (!slotID)
1916         return nullptr;
1917
1918     CARenderServerCaptureLayerWithTransform(MACH_PORT_NULL, self.layer.context.contextId, (uint64_t)self.layer, slotID, 0, 0, &transform);
1919     WebCore::IntSize imageSize = WebCore::expandedIntSize(WebCore::FloatSize(snapshotSize));
1920     return WebKit::ViewSnapshot::create(slotID, imageSize, (imageSize.area() * 4).unsafeGet());
1921 #endif // HAVE(IOSURFACE)
1922 }
1923
1924 - (void)_zoomToPoint:(WebCore::FloatPoint)point atScale:(double)scale animated:(BOOL)animated
1925 {
1926     CFTimeInterval duration = 0;
1927     CGFloat zoomScale = contentZoomScale(self);
1928
1929     if (animated) {
1930         const double maximumZoomDuration = 0.4;
1931         const double minimumZoomDuration = 0.1;
1932         const double zoomDurationFactor = 0.3;
1933
1934         duration = std::min(fabs(log(zoomScale) - log(scale)) * zoomDurationFactor + minimumZoomDuration, maximumZoomDuration);
1935     }
1936
1937     if (scale != zoomScale)
1938         _page->willStartUserTriggeredZooming();
1939
1940     LOG_WITH_STREAM(VisibleRects, stream << "_zoomToPoint:" << point << " scale: " << scale << " duration:" << duration);
1941
1942     [_scrollView _zoomToCenter:point scale:scale duration:duration];
1943 }
1944
1945 - (void)_zoomToRect:(WebCore::FloatRect)targetRect atScale:(double)scale origin:(WebCore::FloatPoint)origin animated:(BOOL)animated
1946 {
1947     // FIXME: Some of this could be shared with _scrollToRect.
1948     const double visibleRectScaleChange = contentZoomScale(self) / scale;
1949     const WebCore::FloatRect visibleRect([self convertRect:self.bounds toView:self._currentContentView]);
1950     const WebCore::FloatRect unobscuredRect([self _contentRectForUserInteraction]);
1951
1952     const WebCore::FloatSize topLeftObscuredInsetAfterZoom((unobscuredRect.minXMinYCorner() - visibleRect.minXMinYCorner()) * visibleRectScaleChange);
1953     const WebCore::FloatSize bottomRightObscuredInsetAfterZoom((visibleRect.maxXMaxYCorner() - unobscuredRect.maxXMaxYCorner()) * visibleRectScaleChange);
1954
1955     const WebCore::FloatSize unobscuredRectSizeAfterZoom(unobscuredRect.size() * visibleRectScaleChange);
1956
1957     // Center to the target rect.
1958     WebCore::FloatPoint unobscuredRectLocationAfterZoom = targetRect.location() - (unobscuredRectSizeAfterZoom - targetRect.size()) * 0.5;
1959
1960     // Center to the tap point instead in case the target rect won't fit in a direction.
1961     if (targetRect.width() > unobscuredRectSizeAfterZoom.width())
1962         unobscuredRectLocationAfterZoom.setX(origin.x() - unobscuredRectSizeAfterZoom.width() / 2);
1963     if (targetRect.height() > unobscuredRectSizeAfterZoom.height())
1964         unobscuredRectLocationAfterZoom.setY(origin.y() - unobscuredRectSizeAfterZoom.height() / 2);
1965
1966     // We have computed where we want the unobscured rect to be. Now adjust for the obscuring insets.
1967     WebCore::FloatRect visibleRectAfterZoom(unobscuredRectLocationAfterZoom, unobscuredRectSizeAfterZoom);
1968     visibleRectAfterZoom.move(-topLeftObscuredInsetAfterZoom);
1969     visibleRectAfterZoom.expand(topLeftObscuredInsetAfterZoom + bottomRightObscuredInsetAfterZoom);
1970
1971     [self _zoomToPoint:visibleRectAfterZoom.center() atScale:scale animated:animated];
1972 }
1973
1974 static WebCore::FloatPoint constrainContentOffset(WebCore::FloatPoint contentOffset, WebCore::FloatSize contentSize, WebCore::FloatSize unobscuredContentSize)
1975 {
1976     WebCore::FloatSize maximumContentOffset = contentSize - unobscuredContentSize;
1977     return contentOffset.constrainedBetween(WebCore::FloatPoint(), WebCore::FloatPoint(maximumContentOffset));
1978 }
1979
1980 - (void)_scrollToContentScrollPosition:(WebCore::FloatPoint)scrollPosition scrollOrigin:(WebCore::IntPoint)scrollOrigin
1981 {
1982     if (_commitDidRestoreScrollPosition || _dynamicViewportUpdateMode != DynamicViewportUpdateMode::NotResizing)
1983         return;
1984
1985     WebCore::FloatPoint contentOffset = WebCore::ScrollableArea::scrollOffsetFromPosition(scrollPosition, toFloatSize(scrollOrigin));
1986
1987     WebCore::FloatPoint scaledOffset = contentOffset;
1988     CGFloat zoomScale = contentZoomScale(self);
1989     scaledOffset.scale(zoomScale);
1990
1991     CGPoint contentOffsetInScrollViewCoordinates = [self _adjustedContentOffset:scaledOffset];
1992     contentOffsetInScrollViewCoordinates = contentOffsetBoundedInValidRange(_scrollView.get(), contentOffsetInScrollViewCoordinates);
1993
1994     [_scrollView _stopScrollingAndZoomingAnimations];
1995
1996     if (!CGPointEqualToPoint(contentOffsetInScrollViewCoordinates, [_scrollView contentOffset]))
1997         [_scrollView setContentOffset:contentOffsetInScrollViewCoordinates];
1998     else {
1999         // If we haven't changed anything, there would not be any VisibleContentRect update sent to the content.
2000         // The WebProcess would keep the invalid contentOffset as its scroll position.
2001         // To synchronize the WebProcess with what is on screen, we send the VisibleContentRect again.
2002         _page->resendLastVisibleContentRects();
2003     }
2004 }
2005
2006 - (BOOL)_scrollToRect:(WebCore::FloatRect)targetRect origin:(WebCore::FloatPoint)origin minimumScrollDistance:(float)minimumScrollDistance
2007 {
2008     WebCore::FloatRect unobscuredContentRect([self _contentRectForUserInteraction]);
2009     WebCore::FloatPoint unobscuredContentOffset = unobscuredContentRect.location();
2010     WebCore::FloatSize contentSize([self._currentContentView bounds].size);
2011
2012     // Center the target rect in the scroll view.
2013     // If the target doesn't fit in the scroll view, center on the gesture location instead.
2014     WebCore::FloatPoint newUnobscuredContentOffset;
2015     if (targetRect.width() <= unobscuredContentRect.width())
2016         newUnobscuredContentOffset.setX(targetRect.x() - (unobscuredContentRect.width() - targetRect.width()) / 2);
2017     else
2018         newUnobscuredContentOffset.setX(origin.x() - unobscuredContentRect.width() / 2);
2019     if (targetRect.height() <= unobscuredContentRect.height())
2020         newUnobscuredContentOffset.setY(targetRect.y() - (unobscuredContentRect.height() - targetRect.height()) / 2);
2021     else
2022         newUnobscuredContentOffset.setY(origin.y() - unobscuredContentRect.height() / 2);
2023     newUnobscuredContentOffset = constrainContentOffset(newUnobscuredContentOffset, contentSize, unobscuredContentRect.size());
2024
2025     if (unobscuredContentOffset == newUnobscuredContentOffset) {
2026         if (targetRect.width() > unobscuredContentRect.width())
2027             newUnobscuredContentOffset.setX(origin.x() - unobscuredContentRect.width() / 2);
2028         if (targetRect.height() > unobscuredContentRect.height())
2029             newUnobscuredContentOffset.setY(origin.y() - unobscuredContentRect.height() / 2);
2030         newUnobscuredContentOffset = constrainContentOffset(newUnobscuredContentOffset, contentSize, unobscuredContentRect.size());
2031     }
2032
2033     WebCore::FloatSize scrollViewOffsetDelta = newUnobscuredContentOffset - unobscuredContentOffset;
2034     scrollViewOffsetDelta.scale(contentZoomScale(self));
2035
2036     float scrollDistance = scrollViewOffsetDelta.diagonalLength();
2037     if (scrollDistance < minimumScrollDistance)
2038         return false;
2039
2040     [_contentView willStartZoomOrScroll];
2041
2042     LOG_WITH_STREAM(VisibleRects, stream << "_scrollToRect: scrolling to " << [_scrollView contentOffset] + scrollViewOffsetDelta);
2043
2044     [_scrollView setContentOffset:([_scrollView contentOffset] + scrollViewOffsetDelta) animated:YES];
2045     return true;
2046 }
2047
2048 - (void)_scrollByContentOffset:(WebCore::FloatPoint)contentOffsetDelta
2049 {
2050     WebCore::FloatPoint scaledOffsetDelta = contentOffsetDelta;
2051     CGFloat zoomScale = contentZoomScale(self);
2052     scaledOffsetDelta.scale(zoomScale);
2053
2054     CGPoint currentOffset = [_scrollView _isAnimatingScroll] ? [_scrollView _animatedTargetOffset] : [_scrollView contentOffset];
2055     CGPoint boundedOffset = contentOffsetBoundedInValidRange(_scrollView.get(), currentOffset + scaledOffsetDelta);
2056
2057     if (CGPointEqualToPoint(boundedOffset, currentOffset))
2058         return;
2059     [_contentView willStartZoomOrScroll];
2060
2061     LOG_WITH_STREAM(VisibleRects, stream << "_scrollByContentOffset: scrolling to " << WebCore::FloatPoint(boundedOffset));
2062
2063     [_scrollView setContentOffset:boundedOffset animated:YES];
2064 }
2065
2066 - (void)_zoomOutWithOrigin:(WebCore::FloatPoint)origin animated:(BOOL)animated
2067 {
2068     [self _zoomToPoint:origin atScale:[_scrollView minimumZoomScale] animated:animated];
2069 }
2070
2071 - (void)_zoomToInitialScaleWithOrigin:(WebCore::FloatPoint)origin animated:(BOOL)animated
2072 {
2073     ASSERT(_initialScaleFactor > 0);
2074     [self _zoomToPoint:origin atScale:_initialScaleFactor animated:animated];
2075 }
2076
2077 // focusedElementRect and selectionRect are both in document coordinates.
2078 - (void)_zoomToFocusRect:(WebCore::FloatRect)focusedElementRectInDocumentCoordinates selectionRect:(WebCore::FloatRect)selectionRectInDocumentCoordinates insideFixed:(BOOL)insideFixed
2079     fontSize:(float)fontSize minimumScale:(double)minimumScale maximumScale:(double)maximumScale allowScaling:(BOOL)allowScaling forceScroll:(BOOL)forceScroll
2080 {
2081     LOG_WITH_STREAM(VisibleRects, stream << "_zoomToFocusRect:" << focusedElementRectInDocumentCoordinates << " selectionRect:" << selectionRectInDocumentCoordinates);
2082     UNUSED_PARAM(insideFixed);
2083
2084     const double WKWebViewStandardFontSize = 16;
2085     const double kMinimumHeightToShowContentAboveKeyboard = 106;
2086     const CFTimeInterval UIWebFormAnimationDuration = 0.25;
2087     const double CaretOffsetFromWindowEdge = 20;
2088
2089     // Zoom around the element's bounding frame. We use a "standard" size to determine the proper frame.
2090     double scale = allowScaling ? std::min(std::max(WKWebViewStandardFontSize / fontSize, minimumScale), maximumScale) : contentZoomScale(self);
2091     CGFloat documentWidth = [_contentView bounds].size.width;
2092     scale = CGRound(documentWidth * scale) / documentWidth;
2093
2094     UIWindow *window = [_scrollView window];
2095
2096     WebCore::FloatRect focusedElementRectInNewScale = focusedElementRectInDocumentCoordinates;
2097     focusedElementRectInNewScale.scale(scale);
2098     focusedElementRectInNewScale.moveBy([_contentView frame].origin);
2099
2100     // Find the portion of the view that is visible on the screen.
2101     UIViewController *topViewController = [[[_scrollView _viewControllerForAncestor] _rootAncestorViewController] _viewControllerForSupportedInterfaceOrientations];
2102     UIView *fullScreenView = topViewController.view;
2103     if (!fullScreenView)
2104         fullScreenView = window;
2105
2106     CGRect unobscuredScrollViewRectInWebViewCoordinates = UIEdgeInsetsInsetRect([self bounds], _obscuredInsets);
2107     CGRect visibleScrollViewBoundsInWebViewCoordinates = CGRectIntersection(unobscuredScrollViewRectInWebViewCoordinates, [fullScreenView convertRect:[fullScreenView bounds] toView:self]);
2108     CGRect formAssistantFrameInWebViewCoordinates = [window convertRect:_inputViewBounds toView:self];
2109     CGRect intersectionBetweenScrollViewAndFormAssistant = CGRectIntersection(visibleScrollViewBoundsInWebViewCoordinates, formAssistantFrameInWebViewCoordinates);
2110     CGSize visibleSize = visibleScrollViewBoundsInWebViewCoordinates.size;
2111
2112     CGFloat visibleOffsetFromTop = 0;
2113     if (!CGRectIsEmpty(intersectionBetweenScrollViewAndFormAssistant)) {
2114         CGFloat heightVisibleAboveFormAssistant = CGRectGetMinY(intersectionBetweenScrollViewAndFormAssistant) - CGRectGetMinY(visibleScrollViewBoundsInWebViewCoordinates);
2115         CGFloat heightVisibleBelowFormAssistant = CGRectGetMaxY(visibleScrollViewBoundsInWebViewCoordinates) - CGRectGetMaxY(intersectionBetweenScrollViewAndFormAssistant);
2116
2117         if (heightVisibleAboveFormAssistant >= kMinimumHeightToShowContentAboveKeyboard || heightVisibleBelowFormAssistant < heightVisibleAboveFormAssistant)
2118             visibleSize.height = heightVisibleAboveFormAssistant;
2119         else {
2120             visibleSize.height = heightVisibleBelowFormAssistant;
2121             visibleOffsetFromTop = CGRectGetMaxY(intersectionBetweenScrollViewAndFormAssistant) - CGRectGetMinY(visibleScrollViewBoundsInWebViewCoordinates);
2122         }
2123     }
2124
2125     BOOL selectionRectIsNotNull = !selectionRectInDocumentCoordinates.isZero();
2126     if (!forceScroll) {
2127         CGRect currentlyVisibleRegionInWebViewCoordinates;
2128         currentlyVisibleRegionInWebViewCoordinates.origin = unobscuredScrollViewRectInWebViewCoordinates.origin;
2129         currentlyVisibleRegionInWebViewCoordinates.origin.y += visibleOffsetFromTop;
2130         currentlyVisibleRegionInWebViewCoordinates.size = visibleSize;
2131
2132         // Don't bother scrolling if the entire node is already visible, whether or not we got a selectionRect.
2133         if (CGRectContainsRect(currentlyVisibleRegionInWebViewCoordinates, [self convertRect:focusedElementRectInDocumentCoordinates fromView:_contentView.get()]))
2134             return;
2135
2136         // Don't bother scrolling if we have a valid selectionRect and it is already visible.
2137         if (selectionRectIsNotNull && CGRectContainsRect(currentlyVisibleRegionInWebViewCoordinates, [self convertRect:selectionRectInDocumentCoordinates fromView:_contentView.get()]))
2138             return;
2139     }
2140
2141     // We want to zoom to the left/top corner of the DOM node, with as much spacing on all sides as we
2142     // can get based on the visible area after zooming (workingFrame).  The spacing in either dimension is half the
2143     // difference between the size of the DOM node and the size of the visible frame.
2144     CGFloat horizontalSpaceInWebViewCoordinates = std::max((visibleSize.width - focusedElementRectInNewScale.width()) / 2.0, 0.0);
2145     CGFloat verticalSpaceInWebViewCoordinates = std::max((visibleSize.height - focusedElementRectInNewScale.height()) / 2.0, 0.0);
2146
2147     CGPoint topLeft;
2148     topLeft.x = focusedElementRectInNewScale.x() - horizontalSpaceInWebViewCoordinates;
2149     topLeft.y = focusedElementRectInNewScale.y() - verticalSpaceInWebViewCoordinates - visibleOffsetFromTop;
2150
2151     CGFloat minimumAllowableHorizontalOffsetInWebViewCoordinates = -INFINITY;
2152     CGFloat minimumAllowableVerticalOffsetInWebViewCoordinates = -INFINITY;
2153     if (selectionRectIsNotNull) {
2154         WebCore::FloatRect selectionRectInNewScale = selectionRectInDocumentCoordinates;
2155         selectionRectInNewScale.scale(scale);
2156         selectionRectInNewScale.moveBy([_contentView frame].origin);
2157         minimumAllowableHorizontalOffsetInWebViewCoordinates = CGRectGetMaxX(selectionRectInNewScale) + CaretOffsetFromWindowEdge - visibleSize.width;
2158         minimumAllowableVerticalOffsetInWebViewCoordinates = CGRectGetMaxY(selectionRectInNewScale) + CaretOffsetFromWindowEdge - visibleSize.height - visibleOffsetFromTop;
2159     }
2160
2161     WebCore::FloatRect documentBoundsInNewScale = [_contentView bounds];
2162     documentBoundsInNewScale.scale(scale);
2163     documentBoundsInNewScale.moveBy([_contentView frame].origin);
2164
2165     // Constrain the left edge in document coordinates so that:
2166     //  - it isn't so small that the scrollVisibleRect isn't visible on the screen
2167     //  - it isn't so great that the document's right edge is less than the right edge of the screen
2168     if (selectionRectIsNotNull && topLeft.x < minimumAllowableHorizontalOffsetInWebViewCoordinates)
2169         topLeft.x = minimumAllowableHorizontalOffsetInWebViewCoordinates;
2170     else {
2171         CGFloat maximumAllowableHorizontalOffset = CGRectGetMaxX(documentBoundsInNewScale) - visibleSize.width;
2172         if (topLeft.x > maximumAllowableHorizontalOffset)
2173             topLeft.x = maximumAllowableHorizontalOffset;
2174     }
2175
2176     // Constrain the top edge in document coordinates so that:
2177     //  - it isn't so small that the scrollVisibleRect isn't visible on the screen
2178     //  - it isn't so great that the document's bottom edge is higher than the top of the form assistant
2179     if (selectionRectIsNotNull && topLeft.y < minimumAllowableVerticalOffsetInWebViewCoordinates)
2180         topLeft.y = minimumAllowableVerticalOffsetInWebViewCoordinates;
2181     else {
2182         CGFloat maximumAllowableVerticalOffset = CGRectGetMaxY(documentBoundsInNewScale) - visibleSize.height;
2183         if (topLeft.y > maximumAllowableVerticalOffset)
2184             topLeft.y = maximumAllowableVerticalOffset;
2185     }
2186
2187     WebCore::FloatPoint newCenter = CGPointMake(topLeft.x + unobscuredScrollViewRectInWebViewCoordinates.size.width / 2.0, topLeft.y + unobscuredScrollViewRectInWebViewCoordinates.size.height / 2.0);
2188
2189     if (scale != contentZoomScale(self))
2190         _page->willStartUserTriggeredZooming();
2191
2192     LOG_WITH_STREAM(VisibleRects, stream << "_zoomToFocusRect: zooming to " << newCenter << " scale:" << scale);
2193
2194     // The newCenter has been computed in the new scale, but _zoomToCenter expected the center to be in the original scale.
2195     newCenter.scale(1 / scale);
2196     [_scrollView _zoomToCenter:newCenter
2197                         scale:scale
2198                      duration:UIWebFormAnimationDuration
2199                         force:YES];
2200 }
2201
2202 - (CGFloat)_targetContentZoomScaleForRect:(const WebCore::FloatRect&)targetRect currentScale:(double)currentScale fitEntireRect:(BOOL)fitEntireRect minimumScale:(double)minimumScale maximumScale:(double)maximumScale
2203 {
2204     WebCore::FloatSize unobscuredContentSize([self _contentRectForUserInteraction].size);
2205     double horizontalScale = unobscuredContentSize.width() * currentScale / targetRect.width();
2206     double verticalScale = unobscuredContentSize.height() * currentScale / targetRect.height();
2207
2208     horizontalScale = std::min(std::max(horizontalScale, minimumScale), maximumScale);
2209     verticalScale = std::min(std::max(verticalScale, minimumScale), maximumScale);
2210
2211     return fitEntireRect ? std::min(horizontalScale, verticalScale) : horizontalScale;
2212 }
2213
2214 - (BOOL)_zoomToRect:(WebCore::FloatRect)targetRect withOrigin:(WebCore::FloatPoint)origin fitEntireRect:(BOOL)fitEntireRect minimumScale:(double)minimumScale maximumScale:(double)maximumScale minimumScrollDistance:(float)minimumScrollDistance
2215 {
2216     const float maximumScaleFactorDeltaForPanScroll = 0.02;
2217
2218     double currentScale = contentZoomScale(self);
2219     double targetScale = [self _targetContentZoomScaleForRect:targetRect currentScale:currentScale fitEntireRect:fitEntireRect minimumScale:minimumScale maximumScale:maximumScale];
2220
2221     if (fabs(targetScale - currentScale) < maximumScaleFactorDeltaForPanScroll) {
2222         if ([self _scrollToRect:targetRect origin:origin minimumScrollDistance:minimumScrollDistance])
2223             return true;
2224     } else if (targetScale != currentScale) {
2225         [self _zoomToRect:targetRect atScale:targetScale origin:origin animated:YES];
2226         return true;
2227     }
2228
2229     return false;
2230 }
2231
2232 - (void)didMoveToWindow
2233 {
2234     _page->activityStateDidChange(WebCore::ActivityState::AllFlags);
2235 }
2236
2237 - (void)setOpaque:(BOOL)opaque
2238 {
2239     BOOL oldOpaque = self.opaque;
2240
2241     [super setOpaque:opaque];
2242     [_contentView setOpaque:opaque];
2243
2244     if (oldOpaque == opaque)
2245         return;
2246
2247     if (!_page)
2248         return;
2249
2250     _page->setDrawsBackground(opaque);
2251     [self _updateScrollViewBackground];
2252 }
2253
2254 - (void)setBackgroundColor:(UIColor *)backgroundColor
2255 {
2256     [super setBackgroundColor:backgroundColor];
2257     [_contentView setBackgroundColor:backgroundColor];
2258 }
2259
2260 - (BOOL)_allowsDoubleTapGestures
2261 {
2262     if (_fastClickingIsDisabled)
2263         return YES;
2264
2265     // If the page is not user scalable, we don't allow double tap gestures.
2266     if (![_scrollView isZoomEnabled] || [_scrollView minimumZoomScale] >= [_scrollView maximumZoomScale])
2267         return NO;
2268
2269     // If the viewport width was not explicit, we allow double tap gestures.
2270     if (!_viewportMetaTagWidthWasExplicit || _viewportMetaTagCameFromImageDocument)
2271         return YES;
2272
2273     // If the page set a viewport width that wasn't the device width, then it was
2274     // scaled and thus will probably need to zoom.
2275     if (_viewportMetaTagWidth != WebCore::ViewportArguments::ValueDeviceWidth)
2276         return YES;
2277
2278     // At this point, we have a page that asked for width = device-width. However,
2279     // if the content's width and height were large, we might have had to shrink it.
2280     // Since we'll enable double tap zoom whenever we're not at the actual
2281     // initial scale, this simply becomes a test of the current scale against 1.
2282     return !areEssentiallyEqualAsFloat(contentZoomScale(self), 1);
2283 }
2284
2285 #pragma mark - UIScrollViewDelegate
2286
2287 - (BOOL)usesStandardContentView
2288 {
2289     return !_customContentView && !_passwordView;
2290 }
2291
2292 - (CGSize)scrollView:(UIScrollView*)scrollView contentSizeForZoomScale:(CGFloat)scale withProposedSize:(CGSize)proposedSize
2293 {
2294     return roundScrollViewContentSize(*_page, proposedSize);
2295 }
2296
2297 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
2298 {
2299     ASSERT(_scrollView == scrollView);
2300
2301     if (_customContentView)
2302         return _customContentView.get();
2303
2304     return _contentView.get();
2305 }
2306
2307 - (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view
2308 {
2309     if (![self usesStandardContentView])
2310         return;
2311
2312     if (scrollView.pinchGestureRecognizer.state == UIGestureRecognizerStateBegan) {
2313         _page->willStartUserTriggeredZooming();
2314         [_contentView scrollViewWillStartPanOrPinchGesture];
2315     }
2316     [_contentView willStartZoomOrScroll];
2317 }
2318
2319 - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
2320 {
2321     if (![self usesStandardContentView])
2322         return;
2323
2324     if (scrollView.panGestureRecognizer.state == UIGestureRecognizerStateBegan)
2325         [_contentView scrollViewWillStartPanOrPinchGesture];
2326
2327     [_contentView willStartZoomOrScroll];
2328 #if ENABLE(CSS_SCROLL_SNAP) && ENABLE(ASYNC_SCROLLING)
2329     // FIXME: We will want to detect whether snapping will occur before beginning to drag. See WebPageProxy::didCommitLayerTree.
2330     WebKit::RemoteScrollingCoordinatorProxy* coordinator = _page->scrollingCoordinatorProxy();
2331     ASSERT(scrollView == _scrollView.get());
2332     CGFloat scrollDecelerationFactor = (coordinator && coordinator->shouldSetScrollViewDecelerationRateFast()) ? UIScrollViewDecelerationRateFast : UIScrollViewDecelerationRateNormal;
2333     scrollView.horizontalScrollDecelerationFactor = scrollDecelerationFactor;
2334     scrollView.verticalScrollDecelerationFactor = scrollDecelerationFactor;
2335 #endif
2336 }
2337
2338 - (void)_didFinishScrolling
2339 {
2340     if (![self usesStandardContentView])
2341         return;
2342
2343     [self _scheduleVisibleContentRectUpdate];
2344     [_contentView didFinishScrolling];
2345 }
2346
2347 - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
2348 {
2349     // Work around <rdar://problem/16374753> by avoiding deceleration while
2350     // zooming. We'll animate to the right place once the zoom finishes.
2351     if ([scrollView isZooming])
2352         *targetContentOffset = [scrollView contentOffset];
2353 #if ENABLE(CSS_SCROLL_SNAP) && ENABLE(ASYNC_SCROLLING)
2354     if (WebKit::RemoteScrollingCoordinatorProxy* coordinator = _page->scrollingCoordinatorProxy()) {
2355         // FIXME: Here, I'm finding the maximum horizontal/vertical scroll offsets. There's probably a better way to do this.
2356         CGSize maxScrollOffsets = CGSizeMake(scrollView.contentSize.width - scrollView.bounds.size.width, scrollView.contentSize.height - scrollView.bounds.size.height);
2357
2358         CGRect fullViewRect = self.bounds;
2359
2360         UIEdgeInsets contentInset;
2361
2362         id<WKUIDelegatePrivate> uiDelegatePrivate = static_cast<id <WKUIDelegatePrivate>>([self UIDelegate]);
2363         if ([uiDelegatePrivate respondsToSelector:@selector(_webView:finalObscuredInsetsForScrollView:withVelocity:targetContentOffset:)])
2364             contentInset = [uiDelegatePrivate _webView:self finalObscuredInsetsForScrollView:scrollView withVelocity:velocity targetContentOffset:targetContentOffset];
2365         else
2366             contentInset = [self _computedContentInset];
2367
2368         CGRect unobscuredRect = UIEdgeInsetsInsetRect(fullViewRect, contentInset);
2369
2370         coordinator->adjustTargetContentOffsetForSnapping(maxScrollOffsets, velocity, unobscuredRect.origin.y, targetContentOffset);
2371     }
2372 #endif
2373 }
2374
2375 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
2376 {
2377     // If we're decelerating, scroll offset will be updated when scrollViewDidFinishDecelerating: is called.
2378     if (!decelerate)
2379         [self _didFinishScrolling];
2380 }
2381
2382 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
2383 {
2384     [self _didFinishScrolling];
2385 }
2386
2387 - (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView
2388 {
2389     [self _didFinishScrolling];
2390 }
2391
2392 - (void)scrollViewDidScroll:(UIScrollView *)scrollView
2393 {
2394     if (![self usesStandardContentView])
2395         [_customContentView scrollViewDidScroll:(UIScrollView *)scrollView];
2396
2397     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2398
2399     if (WebKit::RemoteLayerTreeScrollingPerformanceData* scrollPerfData = _page->scrollingPerformanceData())
2400         scrollPerfData->didScroll([self visibleRectInViewCoordinates]);
2401 }
2402
2403 - (void)scrollViewDidZoom:(UIScrollView *)scrollView
2404 {
2405     [self _updateScrollViewBackground];
2406     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2407 }
2408
2409 - (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale
2410 {
2411     ASSERT(scrollView == _scrollView);
2412     // FIXME: remove when rdar://problem/36065495 is fixed.
2413     // When rotating with two fingers down, UIScrollView can set a bogus content view position.
2414     // "Center" is top left because we set the anchorPoint to 0,0.
2415     [_contentView setCenter:self.bounds.origin];
2416
2417     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2418     [_contentView didZoomToScale:scale];
2419 }
2420
2421 - (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
2422 {
2423     [self _didFinishScrolling];
2424 }
2425
2426 - (void)_scrollViewDidInterruptDecelerating:(UIScrollView *)scrollView
2427 {
2428     if (![self usesStandardContentView])
2429         return;
2430
2431     [_contentView didInterruptScrolling];
2432     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2433 }
2434
2435 - (UIView *)_enclosingViewForExposedRectComputation
2436 {
2437     return [self _scroller];
2438 }
2439
2440 - (CGRect)_visibleRectInEnclosingView:(UIView *)enclosingView
2441 {
2442     if (!enclosingView)
2443         return self.bounds;
2444
2445     CGRect exposedRect = [enclosingView convertRect:enclosingView.bounds toView:self];
2446     return CGRectIntersectsRect(exposedRect, self.bounds) ? CGRectIntersection(exposedRect, self.bounds) : CGRectZero;
2447 }
2448
2449 - (CGRect)_visibleContentRect
2450 {
2451     if (_frozenVisibleContentRect)
2452         return _frozenVisibleContentRect.value();
2453
2454     CGRect visibleRectInContentCoordinates = [self convertRect:self.bounds toView:_contentView.get()];
2455
2456     if (UIView *enclosingView = [self _enclosingViewForExposedRectComputation]) {
2457         CGRect viewVisibleRect = [self _visibleRectInEnclosingView:enclosingView];
2458         CGRect viewVisibleContentRect = [self convertRect:viewVisibleRect toView:_contentView.get()];
2459         visibleRectInContentCoordinates = CGRectIntersection(visibleRectInContentCoordinates, viewVisibleContentRect);
2460     }
2461
2462     return visibleRectInContentCoordinates;
2463 }
2464
2465 // Called when some ancestor UIScrollView scrolls.
2466 - (void)_didScroll
2467 {
2468     [self _scheduleVisibleContentRectUpdateAfterScrollInView:[self _scroller]];
2469
2470     const NSTimeInterval ScrollingEndedTimerInterval = 0.032;
2471     if (!_enclosingScrollViewScrollTimer) {
2472         _enclosingScrollViewScrollTimer = adoptNS([[NSTimer alloc] initWithFireDate:[NSDate dateWithTimeIntervalSinceNow:ScrollingEndedTimerInterval]
2473             interval:0 target:self selector:@selector(_enclosingScrollerScrollingEnded:) userInfo:nil repeats:YES]);
2474         [[NSRunLoop mainRunLoop] addTimer:_enclosingScrollViewScrollTimer.get() forMode:NSDefaultRunLoopMode];
2475     }
2476     _didScrollSinceLastTimerFire = YES;
2477 }
2478
2479 - (void)_enclosingScrollerScrollingEnded:(NSTimer *)timer
2480 {
2481     if (_didScrollSinceLastTimerFire) {
2482         _didScrollSinceLastTimerFire = NO;
2483         return;
2484     }
2485
2486     [self _scheduleVisibleContentRectUpdate];
2487     [_enclosingScrollViewScrollTimer invalidate];
2488     _enclosingScrollViewScrollTimer = nil;
2489 }
2490
2491 - (UIEdgeInsets)_scrollViewSystemContentInset
2492 {
2493     // It's not safe to access the scroll view's safeAreaInsets or _systemContentInset from
2494     // inside our layoutSubviews implementation, because they aren't updated until afterwards.
2495     // Instead, depend on the fact that the UIScrollView and WKWebView are in the same coordinate
2496     // space, and map the WKWebView's own insets into the scroll view manually.
2497     return UIEdgeInsetsAdd([_scrollView _contentScrollInset], self.safeAreaInsets, [_scrollView _edgesApplyingSafeAreaInsetsToContentInset]);
2498 }
2499
2500 - (CGFloat)_minimumAllowedLayoutWidth
2501 {
2502     return _minimumAllowedLayoutWidth;
2503 }
2504
2505 - (void)_setMinimumAllowedLayoutWidth:(CGFloat)minimumAllowedLayoutWidth
2506 {
2507     if (_minimumAllowedLayoutWidth == minimumAllowedLayoutWidth)
2508         return;
2509
2510     _minimumAllowedLayoutWidth = minimumAllowedLayoutWidth;
2511
2512     auto sizes = [self activeMinimumLayoutSizes:self.bounds];
2513     [self _dispatchSetMinimumLayoutSize:sizes.minimumLayoutSize viewSize:sizes.viewSize];
2514 }
2515
2516 - (ActiveViewportLayoutSizes)activeMinimumLayoutSizes:(const CGRect&)bounds
2517 {
2518     if (_overridesMinimumLayoutSize)
2519         return { WebCore::FloatSize(_minimumLayoutSizeOverride), WebCore::FloatSize(_minimumLayoutSizeOverride) };
2520
2521     ActiveViewportLayoutSizes sizes;
2522 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
2523     sizes.viewSize = WebCore::FloatSize(UIEdgeInsetsInsetRect(CGRectMake(0, 0, bounds.size.width, bounds.size.height), self._scrollViewSystemContentInset).size);
2524 #else
2525     sizes.viewSize = WebCore::FloatSize { bounds.size };
2526 #endif
2527
2528     sizes.minimumLayoutSize = { std::max<float>(sizes.viewSize.width(), self._minimumAllowedLayoutWidth), sizes.viewSize.height() };
2529     return sizes;
2530 }
2531
2532 - (void)_dispatchSetMinimumLayoutSize:(WebCore::FloatSize)minimumLayoutSize viewSize:(WebCore::FloatSize)viewSize
2533 {
2534     if (_lastSentMinimumLayoutSize && CGSizeEqualToSize(_lastSentMinimumLayoutSize.value(), minimumLayoutSize))
2535         return;
2536
2537     LOG_WITH_STREAM(VisibleRects, stream << "-[WKWebView " << _page->pageID() << " _dispatchSetMinimumLayoutSize:] " << minimumLayoutSize << " viewSize " << viewSize << " contentZoomScale " << contentZoomScale(self));
2538     _page->setViewportConfigurationMinimumLayoutSize(minimumLayoutSize, viewSize);
2539     _lastSentMinimumLayoutSize = minimumLayoutSize;
2540 }
2541
2542 - (void)_dispatchSetMaximumUnobscuredSize:(WebCore::FloatSize)maximumUnobscuredSize
2543 {
2544     if (_lastSentMaximumUnobscuredSize && CGSizeEqualToSize(_lastSentMaximumUnobscuredSize.value(), maximumUnobscuredSize))
2545         return;
2546
2547     _page->setMaximumUnobscuredSize(maximumUnobscuredSize);
2548     _lastSentMaximumUnobscuredSize = maximumUnobscuredSize;
2549 }
2550
2551 - (void)_dispatchSetDeviceOrientation:(int32_t)deviceOrientation
2552 {
2553     if (_lastSentDeviceOrientation && _lastSentDeviceOrientation.value() == deviceOrientation)
2554         return;
2555
2556     _page->setDeviceOrientation(deviceOrientation);
2557     _lastSentDeviceOrientation = deviceOrientation;
2558 }
2559
2560 - (void)_frameOrBoundsChanged
2561 {
2562     CGRect bounds = self.bounds;
2563     [_scrollView setFrame:bounds];
2564
2565     if (_dynamicViewportUpdateMode == DynamicViewportUpdateMode::NotResizing) {
2566         if (!_overridesMinimumLayoutSize) {
2567             auto sizes = [self activeMinimumLayoutSizes:self.bounds];
2568             [self _dispatchSetMinimumLayoutSize:sizes.minimumLayoutSize viewSize:sizes.viewSize];
2569         }
2570         if (!_overridesMaximumUnobscuredSize)
2571             [self _dispatchSetMaximumUnobscuredSize:WebCore::FloatSize(bounds.size)];
2572
2573         BOOL sizeChanged = NO;
2574         if (auto drawingArea = _page->drawingArea())
2575             sizeChanged = drawingArea->setSize(WebCore::IntSize(bounds.size));
2576
2577         if (sizeChanged & [self usesStandardContentView])
2578             [_contentView setSizeChangedSinceLastVisibleContentRectUpdate:YES];
2579     }
2580
2581     [_customContentView web_setMinimumSize:bounds.size];
2582     [self _scheduleVisibleContentRectUpdate];
2583 }
2584
2585 // Unobscured content rect where the user can interact. When the keyboard is up, this should be the area above or below the keyboard, wherever there is enough space.
2586 - (CGRect)_contentRectForUserInteraction
2587 {
2588     // FIXME: handle split keyboard.
2589     UIEdgeInsets obscuredInsets = _obscuredInsets;
2590     obscuredInsets.bottom = std::max(_obscuredInsets.bottom, _inputViewBounds.size.height);
2591     CGRect unobscuredRect = UIEdgeInsetsInsetRect(self.bounds, obscuredInsets);
2592     return [self convertRect:unobscuredRect toView:self._currentContentView];
2593 }
2594
2595 // Ideally UIScrollView would expose this for us: <rdar://problem/21394567>.
2596 - (BOOL)_scrollViewIsRubberBanding
2597 {
2598     float deviceScaleFactor = _page->deviceScaleFactor();
2599
2600     CGPoint contentOffset = [_scrollView contentOffset];
2601     CGPoint boundedOffset = contentOffsetBoundedInValidRange(_scrollView.get(), contentOffset);
2602     return !pointsEqualInDevicePixels(contentOffset, boundedOffset, deviceScaleFactor);
2603 }
2604
2605 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
2606 - (void)safeAreaInsetsDidChange
2607 {
2608     [super safeAreaInsetsDidChange];
2609
2610     [self _scheduleVisibleContentRectUpdate];
2611 }
2612 #endif
2613
2614 - (void)_scheduleVisibleContentRectUpdate
2615 {
2616     // For visible rect updates not associated with a specific UIScrollView, just consider our own scroller.
2617     [self _scheduleVisibleContentRectUpdateAfterScrollInView:_scrollView.get()];
2618 }
2619
2620 - (BOOL)_scrollViewIsInStableState:(UIScrollView *)scrollView
2621 {
2622     BOOL isStableState = !([scrollView isDragging] || [scrollView isDecelerating] || [scrollView isZooming] || [scrollView _isAnimatingZoom] || [scrollView _isScrollingToTop]);
2623
2624     if (isStableState && scrollView == _scrollView.get())
2625         isStableState = !_isChangingObscuredInsetsInteractively;
2626
2627     if (isStableState && scrollView == _scrollView.get())
2628         isStableState = ![self _scrollViewIsRubberBanding];
2629
2630     if (isStableState)
2631         isStableState = !scrollView._isInterruptingDeceleration;
2632
2633     if (NSNumber *stableOverride = self._stableStateOverride)
2634         isStableState = stableOverride.boolValue;
2635
2636     return isStableState;
2637 }
2638
2639 - (void)_addUpdateVisibleContentRectPreCommitHandler
2640 {
2641     auto retainedSelf = retainPtr(self);
2642     [CATransaction addCommitHandler:[retainedSelf] {
2643         WKWebView *webView = retainedSelf.get();
2644         if (![webView _isValid])
2645             return;
2646         [webView _updateVisibleContentRects];
2647         webView->_hasScheduledVisibleRectUpdate = NO;
2648     } forPhase:kCATransactionPhasePreCommit];
2649 }
2650
2651 - (void)_scheduleVisibleContentRectUpdateAfterScrollInView:(UIScrollView *)scrollView
2652 {
2653     _visibleContentRectUpdateScheduledFromScrollViewInStableState = [self _scrollViewIsInStableState:scrollView];
2654
2655     if (_hasScheduledVisibleRectUpdate)
2656         return;
2657
2658     _hasScheduledVisibleRectUpdate = YES;
2659
2660 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
2661     CATransactionPhase transactionPhase = [CATransaction currentPhase];
2662     if (transactionPhase == kCATransactionPhaseNull || transactionPhase == kCATransactionPhasePreLayout) {
2663         [self _addUpdateVisibleContentRectPreCommitHandler];
2664         return;
2665     }
2666 #endif
2667
2668     dispatch_async(dispatch_get_main_queue(), [retainedSelf = retainPtr(self)] {
2669         WKWebView *webView = retainedSelf.get();
2670         if (![webView _isValid])
2671             return;
2672         [webView _addUpdateVisibleContentRectPreCommitHandler];
2673     });
2674 }
2675
2676 static bool scrollViewCanScroll(UIScrollView *scrollView)
2677 {
2678     if (!scrollView)
2679         return NO;
2680
2681     UIEdgeInsets contentInset = scrollView.contentInset;
2682     CGSize contentSize = scrollView.contentSize;
2683     CGSize boundsSize = scrollView.bounds.size;
2684
2685     return (contentSize.width + contentInset.left + contentInset.right) > boundsSize.width
2686         || (contentSize.height + contentInset.top + contentInset.bottom) > boundsSize.height;
2687 }
2688
2689 - (CGRect)_contentBoundsExtendedForRubberbandingWithScale:(CGFloat)scaleFactor
2690 {
2691     CGPoint contentOffset = [_scrollView contentOffset];
2692     CGPoint boundedOffset = contentOffsetBoundedInValidRange(_scrollView.get(), contentOffset);
2693
2694     CGFloat horiontalRubberbandAmountInContentCoordinates = (contentOffset.x - boundedOffset.x) / scaleFactor;
2695     CGFloat verticalRubberbandAmountInContentCoordinates = (contentOffset.y - boundedOffset.y) / scaleFactor;
2696
2697     CGRect extendedBounds = [_contentView bounds];
2698
2699     if (horiontalRubberbandAmountInContentCoordinates < 0) {
2700         extendedBounds.origin.x += horiontalRubberbandAmountInContentCoordinates;
2701         extendedBounds.size.width -= horiontalRubberbandAmountInContentCoordinates;
2702     } else if (horiontalRubberbandAmountInContentCoordinates > 0)
2703         extendedBounds.size.width += horiontalRubberbandAmountInContentCoordinates;
2704
2705     if (verticalRubberbandAmountInContentCoordinates < 0) {
2706         extendedBounds.origin.y += verticalRubberbandAmountInContentCoordinates;
2707         extendedBounds.size.height -= verticalRubberbandAmountInContentCoordinates;
2708     } else if (verticalRubberbandAmountInContentCoordinates > 0)
2709         extendedBounds.size.height += verticalRubberbandAmountInContentCoordinates;
2710
2711     return extendedBounds;
2712 }
2713
2714 - (void)_updateVisibleContentRects
2715 {
2716     BOOL inStableState = _visibleContentRectUpdateScheduledFromScrollViewInStableState;
2717
2718     if (![self usesStandardContentView]) {
2719         [_passwordView setFrame:self.bounds];
2720         [_customContentView web_computedContentInsetDidChange];
2721         return;
2722     }
2723
2724     if (_delayUpdateVisibleContentRects) {
2725         _hadDelayedUpdateVisibleContentRects = YES;
2726         return;
2727     }
2728
2729     if (_dynamicViewportUpdateMode != DynamicViewportUpdateMode::NotResizing
2730         || (_needsResetViewStateAfterCommitLoadForMainFrame && ![_contentView sizeChangedSinceLastVisibleContentRectUpdate])
2731         || [_scrollView isZoomBouncing]
2732         || _currentlyAdjustingScrollViewInsetsForKeyboard)
2733         return;
2734
2735     CGRect fullViewRect = self.bounds;
2736     CGRect visibleRectInContentCoordinates = [self _visibleContentRect];
2737
2738     UIEdgeInsets computedContentInsetUnadjustedForKeyboard = [self _computedContentInset];
2739     if (!_haveSetObscuredInsets)
2740         computedContentInsetUnadjustedForKeyboard.bottom -= _totalScrollViewBottomInsetAdjustmentForKeyboard;
2741
2742     CGFloat scaleFactor = contentZoomScale(self);
2743
2744     CGRect unobscuredRect = UIEdgeInsetsInsetRect(fullViewRect, computedContentInsetUnadjustedForKeyboard);
2745     CGRect unobscuredRectInContentCoordinates = _frozenUnobscuredContentRect ? _frozenUnobscuredContentRect.value() : [self convertRect:unobscuredRect toView:_contentView.get()];
2746     unobscuredRectInContentCoordinates = CGRectIntersection(unobscuredRectInContentCoordinates, [self _contentBoundsExtendedForRubberbandingWithScale:scaleFactor]);
2747
2748 #if ENABLE(CSS_SCROLL_SNAP) && ENABLE(ASYNC_SCROLLING)
2749     if (inStableState) {
2750         WebKit::RemoteScrollingCoordinatorProxy* coordinator = _page->scrollingCoordinatorProxy();
2751         if (coordinator && coordinator->hasActiveSnapPoint()) {
2752             CGRect unobscuredRect = UIEdgeInsetsInsetRect(fullViewRect, computedContentInsetUnadjustedForKeyboard);
2753
2754             CGPoint currentPoint = [_scrollView contentOffset];
2755             CGPoint activePoint = coordinator->nearestActiveContentInsetAdjustedSnapPoint(unobscuredRect.origin.y, currentPoint);
2756
2757             if (!CGPointEqualToPoint(activePoint, currentPoint)) {
2758                 RetainPtr<WKScrollView> strongScrollView = _scrollView;
2759                 dispatch_async(dispatch_get_main_queue(), [strongScrollView, activePoint] {
2760                     [strongScrollView setContentOffset:activePoint animated:NO];
2761                 });
2762             }
2763         }
2764     }
2765 #endif
2766
2767     [_contentView didUpdateVisibleRect:visibleRectInContentCoordinates
2768         unobscuredRect:unobscuredRectInContentCoordinates
2769         unobscuredRectInScrollViewCoordinates:unobscuredRect
2770         obscuredInsets:_obscuredInsets
2771         unobscuredSafeAreaInsets:[self _computedUnobscuredSafeAreaInset]
2772         inputViewBounds:_inputViewBounds
2773         scale:scaleFactor minimumScale:[_scrollView minimumZoomScale]
2774         inStableState:inStableState
2775         isChangingObscuredInsetsInteractively:_isChangingObscuredInsetsInteractively
2776         enclosedInScrollableAncestorView:scrollViewCanScroll([self _scroller])];
2777
2778     while (!_visibleContentRectUpdateCallbacks.isEmpty()) {
2779         auto callback = _visibleContentRectUpdateCallbacks.takeLast();
2780         callback();
2781     }
2782 }
2783
2784 - (void)_didFinishLoadForMainFrame
2785 {
2786     if (_gestureController)
2787         _gestureController->didFinishLoadForMainFrame();
2788 }
2789
2790 - (void)_didFailLoadForMainFrame
2791 {
2792     if (_gestureController)
2793         _gestureController->didFailLoadForMainFrame();
2794 }
2795
2796 - (void)_didSameDocumentNavigationForMainFrame:(WebKit::SameDocumentNavigationType)navigationType
2797 {
2798     [_customContentView web_didSameDocumentNavigation:toAPI(navigationType)];
2799
2800     if (_gestureController)
2801         _gestureController->didSameDocumentNavigationForMainFrame(navigationType);
2802 }
2803
2804 - (void)_keyboardChangedWithInfo:(NSDictionary *)keyboardInfo adjustScrollView:(BOOL)adjustScrollView
2805 {
2806     NSValue *endFrameValue = [keyboardInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
2807     if (!endFrameValue)
2808         return;
2809
2810     // The keyboard rect is always in screen coordinates. In the view services case the window does not
2811     // have the interface orientation rotation transformation; its host does. So, it makes no sense to
2812     // clip the keyboard rect against its screen.
2813     if ([[self window] _isHostedInAnotherProcess])
2814         _inputViewBounds = [self.window convertRect:[endFrameValue CGRectValue] fromWindow:nil];
2815     else
2816         _inputViewBounds = [self.window convertRect:CGRectIntersection([endFrameValue CGRectValue], self.window.screen.bounds) fromWindow:nil];
2817
2818     if (adjustScrollView) {
2819         CGFloat bottomInsetBeforeAdjustment = [_scrollView contentInset].bottom;
2820         SetForScope<BOOL> insetAdjustmentGuard(_currentlyAdjustingScrollViewInsetsForKeyboard, YES);
2821         [_scrollView _adjustForAutomaticKeyboardInfo:keyboardInfo animated:YES lastAdjustment:&_lastAdjustmentForScroller];
2822         CGFloat bottomInsetAfterAdjustment = [_scrollView contentInset].bottom;
2823         if (bottomInsetBeforeAdjustment != bottomInsetAfterAdjustment)
2824             _totalScrollViewBottomInsetAdjustmentForKeyboard += bottomInsetAfterAdjustment - bottomInsetBeforeAdjustment;
2825     }
2826
2827     [self _scheduleVisibleContentRectUpdate];
2828 }
2829
2830 - (BOOL)_shouldUpdateKeyboardWithInfo:(NSDictionary *)keyboardInfo
2831 {
2832     if ([_contentView isAssistingNode])
2833         return YES;
2834
2835     NSNumber *isLocalKeyboard = [keyboardInfo valueForKey:UIKeyboardIsLocalUserInfoKey];
2836     return isLocalKeyboard && !isLocalKeyboard.boolValue;
2837 }
2838
2839 - (void)_keyboardWillChangeFrame:(NSNotification *)notification
2840 {
2841     if ([self _shouldUpdateKeyboardWithInfo:notification.userInfo])
2842         [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:YES];
2843 }
2844
2845 - (void)_keyboardDidChangeFrame:(NSNotification *)notification
2846 {
2847     [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:NO];
2848 }
2849
2850 - (void)_keyboardWillShow:(NSNotification *)notification
2851 {
2852     if ([self _shouldUpdateKeyboardWithInfo:notification.userInfo])
2853         [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:YES];
2854
2855     _page->setIsKeyboardAnimatingIn(true);
2856 }
2857
2858 - (void)_keyboardDidShow:(NSNotification *)notification
2859 {
2860     _page->setIsKeyboardAnimatingIn(false);
2861 }
2862
2863 - (void)_keyboardWillHide:(NSNotification *)notification
2864 {
2865     // Ignore keyboard will hide notifications sent during rotation. They're just there for
2866     // backwards compatibility reasons and processing the will hide notification would
2867     // temporarily screw up the unobscured view area.
2868     if ([[UIPeripheralHost sharedInstance] rotationState])
2869         return;
2870
2871     [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:YES];
2872 }
2873
2874 - (void)_windowDidRotate:(NSNotification *)notification
2875 {
2876     if (!_overridesInterfaceOrientation)
2877         [self _dispatchSetDeviceOrientation:deviceOrientation()];
2878 }
2879
2880 - (void)_contentSizeCategoryDidChange:(NSNotification *)notification
2881 {
2882     _page->contentSizeCategoryDidChange([self _contentSizeCategory]);
2883 }
2884
2885 - (NSString *)_contentSizeCategory
2886 {
2887     return [[UIApplication sharedApplication] preferredContentSizeCategory];
2888 }
2889
2890 - (void)_accessibilitySettingsDidChange:(NSNotification *)notification
2891 {
2892     _page->accessibilitySettingsDidChange();
2893 }
2894
2895 - (void)setAllowsBackForwardNavigationGestures:(BOOL)allowsBackForwardNavigationGestures
2896 {
2897     if (_allowsBackForwardNavigationGestures == allowsBackForwardNavigationGestures)
2898         return;
2899
2900     _allowsBackForwardNavigationGestures = allowsBackForwardNavigationGestures;
2901
2902     if (allowsBackForwardNavigationGestures) {
2903         if (!_gestureController) {
2904             _gestureController = std::make_unique<WebKit::ViewGestureController>(*_page);
2905             _gestureController->installSwipeHandler(self, [self scrollView]);
2906             if (WKWebView *alternateWebView = [_configuration _alternateWebViewForNavigationGestures])
2907                 _gestureController->setAlternateBackForwardListSourcePage(alternateWebView->_page.get());
2908         }
2909     } else
2910         _gestureController = nullptr;
2911
2912     _page->setShouldRecordNavigationSnapshots(allowsBackForwardNavigationGestures);
2913 }
2914
2915 - (BOOL)allowsBackForwardNavigationGestures
2916 {
2917     return _allowsBackForwardNavigationGestures;
2918 }
2919
2920 - (BOOL)_isNavigationSwipeGestureRecognizer:(UIGestureRecognizer *)recognizer
2921 {
2922     if (!_gestureController)
2923         return NO;
2924     return _gestureController->isNavigationSwipeGestureRecognizer(recognizer);
2925 }
2926
2927 - (void)_navigationGestureDidBegin
2928 {
2929     // During a back/forward swipe, there's a view interposed between this view and the content view that has
2930     // an offset and animation on it, which results in computing incorrect rectangles. Work around by using
2931     // frozen rects during swipes.
2932     CGRect fullViewRect = self.bounds;
2933     CGRect unobscuredRect = UIEdgeInsetsInsetRect(fullViewRect, [self _computedContentInset]);
2934
2935     _frozenVisibleContentRect = [self convertRect:fullViewRect toView:_contentView.get()];
2936     _frozenUnobscuredContentRect = [self convertRect:unobscuredRect toView:_contentView.get()];
2937
2938     LOG_WITH_STREAM(VisibleRects, stream << "_navigationGestureDidBegin: freezing visibleContentRect " << WebCore::FloatRect(_frozenVisibleContentRect.value()) << " UnobscuredContentRect " << WebCore::FloatRect(_frozenUnobscuredContentRect.value()));
2939 }
2940
2941 - (void)_navigationGestureDidEnd
2942 {
2943     _frozenVisibleContentRect = std::nullopt;
2944     _frozenUnobscuredContentRect = std::nullopt;
2945 }
2946
2947 - (void)_showPasswordViewWithDocumentName:(NSString *)documentName passwordHandler:(void (^)(NSString *))passwordHandler
2948 {
2949     ASSERT(!_passwordView);
2950     _passwordView = adoptNS([[WKPasswordView alloc] initWithFrame:self.bounds documentName:documentName]);
2951     [_passwordView setUserDidEnterPassword:passwordHandler];
2952     [_passwordView showInScrollView:_scrollView.get()];
2953     self._currentContentView.hidden = YES;
2954 }
2955
2956 - (void)_hidePasswordView
2957 {
2958     if (!_passwordView)
2959         return;
2960
2961     self._currentContentView.hidden = NO;
2962     [_passwordView hide];
2963     _passwordView = nil;
2964 }
2965
2966 - (WKPasswordView *)_passwordView
2967 {
2968     return _passwordView.get();
2969 }
2970
2971 - (void)_updateScrollViewInsetAdjustmentBehavior
2972 {
2973 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
2974     if (![_scrollView _contentInsetAdjustmentBehaviorWasExternallyOverridden])
2975         [_scrollView _setContentInsetAdjustmentBehaviorInternal:self._safeAreaShouldAffectObscuredInsets ? UIScrollViewContentInsetAdjustmentAlways : UIScrollViewContentInsetAdjustmentNever];
2976 #endif
2977 }
2978
2979 - (void)_setAvoidsUnsafeArea:(BOOL)avoidsUnsafeArea
2980 {
2981     if (_avoidsUnsafeArea == avoidsUnsafeArea)
2982         return;
2983
2984     _avoidsUnsafeArea = avoidsUnsafeArea;
2985
2986     [self _updateScrollViewInsetAdjustmentBehavior];
2987     [self _scheduleVisibleContentRectUpdate];
2988
2989     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)[self UIDelegate];
2990     if ([uiDelegate respondsToSelector:@selector(_webView:didChangeSafeAreaShouldAffectObscuredInsets:)])
2991         [uiDelegate _webView:self didChangeSafeAreaShouldAffectObscuredInsets:avoidsUnsafeArea];
2992 }
2993
2994 #endif // PLATFORM(IOS)
2995
2996 #pragma mark OS X-specific methods
2997
2998 #if PLATFORM(MAC)
2999
3000 - (BOOL)acceptsFirstResponder
3001 {
3002     return _impl->acceptsFirstResponder();
3003 }
3004
3005 - (BOOL)becomeFirstResponder
3006 {
3007     return _impl->becomeFirstResponder();
3008 }
3009
3010 - (BOOL)resignFirstResponder
3011 {
3012     return _impl->resignFirstResponder();
3013 }
3014
3015 - (void)viewWillStartLiveResize
3016 {
3017     _impl->viewWillStartLiveResize();
3018 }
3019
3020 - (void)viewDidEndLiveResize
3021 {
3022     _impl->viewDidEndLiveResize();
3023 }
3024
3025 - (BOOL)isFlipped
3026 {
3027     return YES;
3028 }
3029
3030 - (NSSize)intrinsicContentSize
3031 {
3032     return NSSizeFromCGSize(_impl->intrinsicContentSize());
3033 }
3034
3035 - (void)prepareContentInRect:(NSRect)rect
3036 {
3037     _impl->prepareContentInRect(NSRectToCGRect(rect));
3038 }
3039
3040 - (void)setFrameSize:(NSSize)size
3041 {
3042     [super setFrameSize:size];
3043     _impl->setFrameSize(NSSizeToCGSize(size));
3044 }
3045
3046 - (void)renewGState
3047 {
3048     _impl->renewGState();
3049     [super renewGState];
3050 }
3051
3052 #define WEBCORE_COMMAND(command) - (void)command:(id)sender { _impl->executeEditCommandForSelector(_cmd); }
3053
3054 WEBCORE_COMMAND(alignCenter)
3055 WEBCORE_COMMAND(alignJustified)
3056 WEBCORE_COMMAND(alignLeft)
3057 WEBCORE_COMMAND(alignRight)
3058 WEBCORE_COMMAND(copy)
3059 WEBCORE_COMMAND(cut)
3060 WEBCORE_COMMAND(delete)
3061 WEBCORE_COMMAND(deleteBackward)
3062 WEBCORE_COMMAND(deleteBackwardByDecomposingPreviousCharacter)
3063 WEBCORE_COMMAND(deleteForward)
3064 WEBCORE_COMMAND(deleteToBeginningOfLine)
3065 WEBCORE_COMMAND(deleteToBeginningOfParagraph)
3066 WEBCORE_COMMAND(deleteToEndOfLine)
3067 WEBCORE_COMMAND(deleteToEndOfParagraph)
3068 WEBCORE_COMMAND(deleteToMark)
3069 WEBCORE_COMMAND(deleteWordBackward)
3070 WEBCORE_COMMAND(deleteWordForward)
3071 WEBCORE_COMMAND(ignoreSpelling)
3072 WEBCORE_COMMAND(indent)
3073 WEBCORE_COMMAND(insertBacktab)
3074 WEBCORE_COMMAND(insertLineBreak)
3075 WEBCORE_COMMAND(insertNewline)
3076 WEBCORE_COMMAND(insertNewlineIgnoringFieldEditor)
3077 WEBCORE_COMMAND(insertParagraphSeparator)
3078 WEBCORE_COMMAND(insertTab)
3079 WEBCORE_COMMAND(insertTabIgnoringFieldEditor)
3080 WEBCORE_COMMAND(makeTextWritingDirectionLeftToRight)
3081 WEBCORE_COMMAND(makeTextWritingDirectionNatural)
3082 WEBCORE_COMMAND(makeTextWritingDirectionRightToLeft)
3083 WEBCORE_COMMAND(moveBackward)
3084 WEBCORE_COMMAND(moveBackwardAndModifySelection)
3085 WEBCORE_COMMAND(moveDown)
3086 WEBCORE_COMMAND(moveDownAndModifySelection)
3087 WEBCORE_COMMAND(moveForward)
3088 WEBCORE_COMMAND(moveForwardAndModifySelection)
3089 WEBCORE_COMMAND(moveLeft)
3090 WEBCORE_COMMAND(moveLeftAndModifySelection)
3091 WEBCORE_COMMAND(moveParagraphBackwardAndModifySelection)
3092 WEBCORE_COMMAND(moveParagraphForwardAndModifySelection)
3093 WEBCORE_COMMAND(moveRight)
3094 WEBCORE_COMMAND(moveRightAndModifySelection)
3095 WEBCORE_COMMAND(moveToBeginningOfDocument)
3096 WEBCORE_COMMAND(moveToBeginningOfDocumentAndModifySelection)
3097 WEBCORE_COMMAND(moveToBeginningOfLine)
3098 WEBCORE_COMMAND(moveToBeginningOfLineAndModifySelection)
3099 WEBCORE_COMMAND(moveToBeginningOfParagraph)
3100 WEBCORE_COMMAND(moveToBeginningOfParagraphAndModifySelection)
3101 WEBCORE_COMMAND(moveToBeginningOfSentence)
3102 WEBCORE_COMMAND(moveToBeginningOfSentenceAndModifySelection)
3103 WEBCORE_COMMAND(moveToEndOfDocument)
3104 WEBCORE_COMMAND(moveToEndOfDocumentAndModifySelection)
3105 WEBCORE_COMMAND(moveToEndOfLine)
3106 WEBCORE_COMMAND(moveToEndOfLineAndModifySelection)
3107 WEBCORE_COMMAND(moveToEndOfParagraph)
3108 WEBCORE_COMMAND(moveToEndOfParagraphAndModifySelection)
3109 WEBCORE_COMMAND(moveToEndOfSentence)
3110 WEBCORE_COMMAND(moveToEndOfSentenceAndModifySelection)
3111 WEBCORE_COMMAND(moveToLeftEndOfLine)
3112 WEBCORE_COMMAND(moveToLeftEndOfLineAndModifySelection)
3113 WEBCORE_COMMAND(moveToRightEndOfLine)
3114 WEBCORE_COMMAND(moveToRightEndOfLineAndModifySelection)
3115 WEBCORE_COMMAND(moveUp)
3116 WEBCORE_COMMAND(moveUpAndModifySelection)
3117 WEBCORE_COMMAND(moveWordBackward)
3118 WEBCORE_COMMAND(moveWordBackwardAndModifySelection)
3119 WEBCORE_COMMAND(moveWordForward)
3120 WEBCORE_COMMAND(moveWordForwardAndModifySelection)
3121 WEBCORE_COMMAND(moveWordLeft)
3122 WEBCORE_COMMAND(moveWordLeftAndModifySelection)
3123 WEBCORE_COMMAND(moveWordRight)
3124 WEBCORE_COMMAND(moveWordRightAndModifySelection)
3125 WEBCORE_COMMAND(outdent)
3126 WEBCORE_COMMAND(pageDown)
3127 WEBCORE_COMMAND(pageDownAndModifySelection)
3128 WEBCORE_COMMAND(pageUp)
3129 WEBCORE_COMMAND(pageUpAndModifySelection)
3130 WEBCORE_COMMAND(paste)
3131 WEBCORE_COMMAND(pasteAsPlainText)
3132 WEBCORE_COMMAND(scrollPageDown)
3133 WEBCORE_COMMAND(scrollPageUp)
3134 WEBCORE_COMMAND(scrollLineDown)
3135 WEBCORE_COMMAND(scrollLineUp)
3136 WEBCORE_COMMAND(scrollToBeginningOfDocument)
3137 WEBCORE_COMMAND(scrollToEndOfDocument)
3138 WEBCORE_COMMAND(selectAll)
3139 WEBCORE_COMMAND(selectLine)
3140 WEBCORE_COMMAND(selectParagraph)
3141 WEBCORE_COMMAND(selectSentence)
3142 WEBCORE_COMMAND(selectToMark)
3143 WEBCORE_COMMAND(selectWord)
3144 WEBCORE_COMMAND(setMark)
3145 WEBCORE_COMMAND(subscript)
3146 WEBCORE_COMMAND(superscript)
3147 WEBCORE_COMMAND(swapWithMark)
3148 WEBCORE_COMMAND(takeFindStringFromSelection)
3149 WEBCORE_COMMAND(transpose)
3150 WEBCORE_COMMAND(underline)
3151 WEBCORE_COMMAND(unscript)
3152 WEBCORE_COMMAND(yank)
3153 WEBCORE_COMMAND(yankAndSelect)
3154
3155 #undef WEBCORE_COMMAND
3156
3157 - (BOOL)writeSelectionToPasteboard:(NSPasteboard *)pasteboard types:(NSArray *)types
3158 {
3159     return _impl->writeSelectionToPasteboard(pasteboard, types);
3160 }
3161
3162 - (void)centerSelectionInVisibleArea:(id)sender
3163 {
3164     _impl->centerSelectionInVisibleArea();
3165 }
3166
3167 - (id)validRequestorForSendType:(NSString *)sendType returnType:(NSString *)returnType
3168 {
3169     return _impl->validRequestorForSendAndReturnTypes(sendType, returnType);
3170 }
3171
3172 - (BOOL)readSelectionFromPasteboard:(NSPasteboard *)pasteboard
3173 {
3174     return _impl->readSelectionFromPasteboard(pasteboard);
3175 }
3176
3177 - (void)changeFont:(id)sender
3178 {
3179     _impl->changeFontFromFontPanel();
3180 }
3181
3182 - (IBAction)startSpeaking:(id)sender
3183 {
3184     _impl->startSpeaking();
3185 }
3186
3187 - (IBAction)stopSpeaking:(id)sender
3188 {
3189     _impl->stopSpeaking(sender);
3190 }
3191
3192 - (IBAction)showGuessPanel:(id)sender
3193 {
3194     _impl->showGuessPanel(sender);
3195 }
3196
3197 - (IBAction)checkSpelling:(id)sender
3198 {
3199     _impl->checkSpelling();
3200 }
3201
3202 - (void)changeSpelling:(id)sender
3203 {
3204     _impl->changeSpelling(sender);
3205 }
3206
3207 - (IBAction)toggleContinuousSpellChecking:(id)sender
3208 {
3209     _impl->toggleContinuousSpellChecking();
3210 }
3211
3212 - (BOOL)isGrammarCheckingEnabled
3213 {
3214     return _impl->isGrammarCheckingEnabled();
3215 }
3216
3217 - (void)setGrammarCheckingEnabled:(BOOL)flag
3218 {
3219     _impl->setGrammarCheckingEnabled(flag);
3220 }
3221
3222 - (IBAction)toggleGrammarChecking:(id)sender
3223 {
3224     _impl->toggleGrammarChecking();
3225 }
3226
3227 - (IBAction)toggleAutomaticSpellingCorrection:(id)sender
3228 {
3229     _impl->toggleAutomaticSpellingCorrection();
3230 }
3231
3232 - (void)orderFrontSubstitutionsPanel:(id)sender
3233 {
3234     _impl->orderFrontSubstitutionsPanel(sender);
3235 }
3236
3237 - (IBAction)toggleSmartInsertDelete:(id)sender
3238 {
3239     _impl->toggleSmartInsertDelete();
3240 }
3241
3242 - (BOOL)isAutomaticQuoteSubstitutionEnabled
3243 {
3244     return _impl->isAutomaticQuoteSubstitutionEnabled();
3245 }
3246
3247 - (void)setAutomaticQuoteSubstitutionEnabled:(BOOL)flag
3248 {
3249     _impl->setAutomaticQuoteSubstitutionEnabled(flag);
3250 }
3251
3252 - (void)toggleAutomaticQuoteSubstitution:(id)sender
3253 {
3254     _impl->toggleAutomaticQuoteSubstitution();
3255 }
3256
3257 - (BOOL)isAutomaticDashSubstitutionEnabled
3258 {
3259     return _impl->isAutomaticDashSubstitutionEnabled();
3260 }
3261
3262 - (void)setAutomaticDashSubstitutionEnabled:(BOOL)flag
3263 {
3264     _impl->setAutomaticDashSubstitutionEnabled(flag);
3265 }
3266
3267 - (void)toggleAutomaticDashSubstitution:(id)sender
3268 {
3269     _impl->toggleAutomaticDashSubstitution();
3270 }
3271
3272 - (BOOL)isAutomaticLinkDetectionEnabled
3273 {
3274     return _impl->isAutomaticLinkDetectionEnabled();
3275 }
3276
3277 - (void)setAutomaticLinkDetectionEnabled:(BOOL)flag
3278 {
3279     _impl->setAutomaticLinkDetectionEnabled(flag);
3280 }
3281
3282 - (void)toggleAutomaticLinkDetection:(id)sender
3283 {
3284     _impl->toggleAutomaticLinkDetection();
3285 }
3286
3287 - (BOOL)isAutomaticTextReplacementEnabled
3288 {
3289     return _impl->isAutomaticTextReplacementEnabled();
3290 }
3291
3292 - (void)setAutomaticTextReplacementEnabled:(BOOL)flag
3293 {
3294     _impl->setAutomaticTextReplacementEnabled(flag);
3295 }
3296
3297 - (void)toggleAutomaticTextReplacement:(id)sender
3298 {
3299     _impl->toggleAutomaticTextReplacement();
3300 }
3301
3302 - (void)uppercaseWord:(id)sender
3303 {
3304     _impl->uppercaseWord();
3305 }
3306
3307 - (void)lowercaseWord:(id)sender
3308 {
3309     _impl->lowercaseWord();
3310 }
3311
3312 - (void)capitalizeWord:(id)sender
3313 {
3314     _impl->capitalizeWord();
3315 }
3316
3317 - (BOOL)_wantsKeyDownForEvent:(NSEvent *)event
3318 {
3319     return _impl->wantsKeyDownForEvent(event);
3320 }
3321
3322 - (void)scrollWheel:(NSEvent *)event
3323 {
3324     _impl->scrollWheel(event);
3325 }
3326
3327 - (void)swipeWithEvent:(NSEvent *)event
3328 {
3329     _impl->swipeWithEvent(event);
3330 }
3331
3332 - (void)mouseMoved:(NSEvent *)event
3333 {
3334     _impl->mouseMoved(event);
3335 }
3336
3337 - (void)mouseDown:(NSEvent *)event
3338 {
3339     _impl->mouseDown(event);
3340 }
3341
3342 - (void)mouseUp:(NSEvent *)event
3343 {
3344     _impl->mouseUp(event);
3345 }
3346
3347 - (void)mouseDragged:(NSEvent *)event
3348 {
3349     _impl->mouseDragged(event);
3350 }
3351
3352 - (void)mouseEntered:(NSEvent *)event
3353 {
3354     _impl->mouseEntered(event);
3355 }
3356
3357 - (void)mouseExited:(NSEvent *)event
3358 {
3359     _impl->mouseExited(event);
3360 }
3361
3362 - (void)otherMouseDown:(NSEvent *)event
3363 {
3364     _impl->otherMouseDown(event);
3365 }
3366
3367 - (void)otherMouseDragged:(NSEvent *)event
3368 {
3369     _impl->otherMouseDragged(event);
3370 }
3371
3372 - (void)otherMouseUp:(NSEvent *)event
3373 {
3374     _impl->otherMouseUp(event);
3375 }
3376
3377 - (void)rightMouseDown:(NSEvent *)event
3378 {
3379     _impl->rightMouseDown(event);
3380 }
3381
3382 - (void)rightMouseDragged:(NSEvent *)event
3383 {
3384     _impl->rightMouseDragged(event);
3385 }
3386
3387 - (void)rightMouseUp:(NSEvent *)event
3388 {
3389     _impl->rightMouseUp(event);
3390 }
3391
3392 - (void)pressureChangeWithEvent:(NSEvent *)event
3393 {
3394     _impl->pressureChangeWithEvent(event);
3395 }
3396
3397 - (BOOL)acceptsFirstMouse:(NSEvent *)event
3398 {
3399     return _impl->acceptsFirstMouse(event);
3400 }
3401
3402 - (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)event
3403 {
3404     return _impl->shouldDelayWindowOrderingForEvent(event);
3405 }
3406
3407 - (void)doCommandBySelector:(SEL)selector
3408 {
3409     _impl->doCommandBySelector(selector);
3410 }
3411
3412 - (void)insertText:(id)string
3413 {
3414     _impl->insertText(string);
3415 }
3416
3417 - (void)insertText:(id)string replacementRange:(NSRange)replacementRange
3418 {
3419     _impl->insertText(string, replacementRange);
3420 }
3421
3422 - (NSTextInputContext *)inputContext
3423 {
3424     if (!_impl)
3425         return nil;
3426     return _impl->inputContext();
3427 }
3428
3429 - (BOOL)performKeyEquivalent:(NSEvent *)event
3430 {
3431     return _impl->performKeyEquivalent(event);
3432 }
3433
3434 - (void)keyUp:(NSEvent *)theEvent
3435 {
3436     _impl->keyUp(theEvent);
3437 }
3438
3439 - (void)keyDown:(NSEvent *)theEvent
3440 {
3441     _impl->keyDown(theEvent);
3442 }
3443
3444 - (void)flagsChanged:(NSEvent *)theEvent
3445 {
3446     _impl->flagsChanged(theEvent);
3447 }
3448
3449 - (void)setMarkedText:(id)string selectedRange:(NSRange)newSelectedRange replacementRange:(NSRange)replacementRange
3450 {
3451     _impl->setMarkedText(string, newSelectedRange, replacementRange);
3452 }
3453
3454 - (void)unmarkText
3455 {
3456     _impl->unmarkText();
3457 }
3458
3459 - (NSRange)selectedRange
3460 {
3461     return _impl->selectedRange();
3462 }
3463
3464 - (BOOL)hasMarkedText
3465 {
3466     return _impl->hasMarkedText();
3467 }
3468
3469 - (NSRange)markedRange
3470 {
3471     return _impl->markedRange();
3472 }
3473
3474 - (NSAttributedString *)attributedSubstringForProposedRange:(NSRange)nsRange actualRange:(NSRangePointer)actualRange
3475 {
3476     return _impl->attributedSubstringForProposedRange(nsRange, actualRange);
3477 }
3478
3479 - (NSUInteger)characterIndexForPoint:(NSPoint)thePoint
3480 {
3481     return _impl->characterIndexForPoint(thePoint);
3482 }
3483
3484 - (NSRect)firstRectForCharacterRange:(NSRange)theRange actualRange:(NSRangePointer)actualRange
3485 {
3486     return _impl->firstRectForCharacterRange(theRange, actualRange);
3487 }
3488
3489 - (void)selectedRangeWithCompletionHandler:(void(^)(NSRange selectedRange))completionHandlerPtr
3490 {
3491     _impl->selectedRangeWithCompletionHandler(completionHandlerPtr);
3492 }
3493
3494 - (void)markedRangeWithCompletionHandler:(void(^)(NSRange markedRange))completionHandlerPtr
3495 {
3496     _impl->markedRangeWithCompletionHandler(completionHandlerPtr);
3497 }
3498
3499 - (void)hasMarkedTextWithCompletionHandler:(void(^)(BOOL hasMarkedText))completionHandlerPtr
3500 {