We should pass minimumEffectiveDeviceWidth to web process on new page creation.
[WebKit-https.git] / 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
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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.
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15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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24  */
25
26 #import "config.h"
27 #import "WKWebViewInternal.h"
28
29 #import "APIFormClient.h"
30 #import "APIPageConfiguration.h"
31 #import "APISerializedScriptValue.h"
32 #import "AttributedString.h"
33 #import "CompletionHandlerCallChecker.h"
34 #import "DiagnosticLoggingClient.h"
35 #import "DynamicViewportSizeUpdate.h"
36 #import "FindClient.h"
37 #import "FrontBoardServicesSPI.h"
38 #import "FullscreenClient.h"
39 #import "GlobalFindInPageState.h"
40 #import "IconLoadingDelegate.h"
41 #import "LegacySessionStateCoding.h"
42 #import "Logging.h"
43 #import "MediaCaptureUtilities.h"
44 #import "NavigationState.h"
45 #import "ObjCObjectGraph.h"
46 #import "PageClient.h"
47 #import "ProvisionalPageProxy.h"
48 #import "RemoteLayerTreeScrollingPerformanceData.h"
49 #import "RemoteLayerTreeTransaction.h"
50 #import "RemoteObjectRegistry.h"
51 #import "RemoteObjectRegistryMessages.h"
52 #import "SafeBrowsingWarning.h"
53 #import "TextInputContext.h"
54 #import "UIDelegate.h"
55 #import "UserMediaProcessManager.h"
56 #import "VersionChecks.h"
57 #import "ViewGestureController.h"
58 #import "ViewSnapshotStore.h"
59 #import "WKBackForwardListInternal.h"
60 #import "WKBackForwardListItemInternal.h"
61 #import "WKBrowsingContextHandleInternal.h"
62 #import "WKDragDestinationAction.h"
63 #import "WKErrorInternal.h"
64 #import "WKHistoryDelegatePrivate.h"
65 #import "WKLayoutMode.h"
66 #import "WKNSData.h"
67 #import "WKNSURLExtras.h"
68 #import "WKNavigationDelegate.h"
69 #import "WKNavigationInternal.h"
70 #import "WKPreferencesInternal.h"
71 #import "WKProcessPoolInternal.h"
72 #import "WKSafeBrowsingWarning.h"
73 #import "WKSharedAPICast.h"
74 #import "WKSnapshotConfiguration.h"
75 #import "WKUIDelegate.h"
76 #import "WKUIDelegatePrivate.h"
77 #import "WKUserContentControllerInternal.h"
78 #import "WKWebViewConfigurationInternal.h"
79 #import "WKWebViewContentProvider.h"
80 #import "WKWebpagePreferencesInternal.h"
81 #import "WKWebsiteDataStoreInternal.h"
82 #import "WebBackForwardList.h"
83 #import "WebCertificateInfo.h"
84 #import "WebFullScreenManagerProxy.h"
85 #import "WebPageGroup.h"
86 #import "WebPageProxy.h"
87 #import "WebPreferencesKeys.h"
88 #import "WebProcessPool.h"
89 #import "WebProcessProxy.h"
90 #import "WebURLSchemeHandlerCocoa.h"
91 #import "WebViewImpl.h"
92 #import "_WKActivatedElementInfoInternal.h"
93 #import "_WKDiagnosticLoggingDelegate.h"
94 #import "_WKFindDelegate.h"
95 #import "_WKFrameHandleInternal.h"
96 #import "_WKFullscreenDelegate.h"
97 #import "_WKHitTestResultInternal.h"
98 #import "_WKInputDelegate.h"
99 #import "_WKInspectorInternal.h"
100 #import "_WKRemoteObjectRegistryInternal.h"
101 #import "_WKSessionStateInternal.h"
102 #import "_WKTextInputContextInternal.h"
103 #import "_WKVisitedLinkStoreInternal.h"
104 #import "_WKWebsitePoliciesInternal.h"
105 #import <WebCore/GraphicsContextCG.h>
106 #import <WebCore/IOSurface.h>
107 #import <WebCore/JSDOMBinding.h>
108 #import <WebCore/JSDOMExceptionHandling.h>
109 #import <WebCore/MIMETypeRegistry.h>
110 #import <WebCore/PlatformScreen.h>
111 #import <WebCore/RuntimeApplicationChecks.h>
112 #import <WebCore/SQLiteDatabaseTracker.h>
113 #import <WebCore/SchemeRegistry.h>
114 #import <WebCore/Settings.h>
115 #import <WebCore/SharedBuffer.h>
116 #import <WebCore/StringUtilities.h>
117 #import <WebCore/ValidationBubble.h>
118 #import <WebCore/ViewportArguments.h>
119 #import <WebCore/WritingMode.h>
120 #import <pal/spi/cocoa/NSKeyedArchiverSPI.h>
121 #import <pal/spi/mac/NSTextFinderSPI.h>
122 #import <wtf/BlockPtr.h>
123 #import <wtf/HashMap.h>
124 #import <wtf/MathExtras.h>
125 #import <wtf/NeverDestroyed.h>
126 #import <wtf/Optional.h>
127 #import <wtf/RetainPtr.h>
128 #import <wtf/SetForScope.h>
129 #import <wtf/UUID.h>
130 #import <wtf/spi/darwin/dyldSPI.h>
131 #import <wtf/text/TextStream.h>
132
133 #if ENABLE(APPLICATION_MANIFEST)
134 #import "_WKApplicationManifestInternal.h"
135 #endif
136
137 #if ENABLE(DATA_DETECTION)
138 #import "WKDataDetectorTypesInternal.h"
139 #endif
140
141 #if PLATFORM(IOS_FAMILY)
142 #import "InteractionInformationAtPosition.h"
143 #import "InteractionInformationRequest.h"
144 #import "ProcessThrottler.h"
145 #import "RemoteLayerTreeDrawingAreaProxy.h"
146 #import "RemoteScrollingCoordinatorProxy.h"
147 #import "UIKitSPI.h"
148 #import "VideoFullscreenManagerProxy.h"
149 #import "WKContentViewInteraction.h"
150 #import "WKPasswordView.h"
151 #import "WKScrollView.h"
152 #import "WKWebViewContentProviderRegistry.h"
153 #import "_WKWebViewPrintFormatter.h"
154 #import <MobileCoreServices/MobileCoreServices.h>
155 #import <UIKit/UIApplication.h>
156 #import <WebCore/FrameLoaderTypes.h>
157 #import <WebCore/InspectorOverlay.h>
158 #import <WebCore/ScrollableArea.h>
159 #import <WebCore/WebBackgroundTaskController.h>
160 #import <WebCore/WebSQLiteDatabaseTrackerClient.h>
161 #import <pal/spi/cg/CoreGraphicsSPI.h>
162 #import <pal/spi/cocoa/QuartzCoreSPI.h>
163 #import <pal/spi/ios/GraphicsServicesSPI.h>
164 #import <wtf/cocoa/Entitlements.h>
165
166 #define RELEASE_LOG_IF_ALLOWED(...) RELEASE_LOG_IF(_page && _page->isAlwaysOnLoggingAllowed(), ViewState, __VA_ARGS__)
167
168 @interface UIView (UIViewInternal)
169 - (UIViewController *)_viewControllerForAncestor;
170 @end
171
172 @interface UIWindow (UIWindowInternal)
173 - (BOOL)_isHostedInAnotherProcess;
174 @end
175
176 @interface UIViewController (UIViewControllerInternal)
177 - (UIViewController *)_rootAncestorViewController;
178 - (UIViewController *)_viewControllerForSupportedInterfaceOrientations;
179 @end
180
181 #endif // PLATFORM(IOS_FAMILY)
182
183 #if PLATFORM(IOS_FAMILY)
184 static const uint32_t firstSDKVersionWithLinkPreviewEnabledByDefault = 0xA0000;
185 static const Seconds delayBeforeNoVisibleContentsRectsLogging = 1_s;
186 #endif
187
188 #if PLATFORM(MAC)
189 #import "AppKitSPI.h"
190 #import "WKTextFinderClient.h"
191 #import "WKViewInternal.h"
192 #import <WebCore/ColorMac.h>
193
194 @interface WKWebView () <WebViewImplDelegate, NSTextInputClient, NSTextInputClient_Async>
195 @end
196
197 #if HAVE(TOUCH_BAR)
198 @interface WKWebView () <NSTouchBarProvider>
199 @end
200 #endif // HAVE(TOUCH_BAR)
201 #endif // PLATFORM(MAC)
202
203 #if ENABLE(ACCESSIBILITY_EVENTS)
204 #import "AccessibilitySupportSPI.h"
205 #import <wtf/darwin/WeakLinking.h>
206 #endif
207
208 #if PLATFORM(MAC) && ENABLE(DRAG_SUPPORT)
209
210 @interface WKWebView () <NSFilePromiseProviderDelegate, NSDraggingSource>
211 @end
212
213 #endif
214
215 static HashMap<WebKit::WebPageProxy*, __unsafe_unretained WKWebView *>& pageToViewMap()
216 {
217     static NeverDestroyed<HashMap<WebKit::WebPageProxy*, __unsafe_unretained WKWebView *>> map;
218     return map;
219 }
220
221 WKWebView* fromWebPageProxy(WebKit::WebPageProxy& page)
222 {
223     return pageToViewMap().get(&page);
224 }
225
226 #if PLATFORM(MAC)
227 static _WKOverlayScrollbarStyle toAPIScrollbarStyle(Optional<WebCore::ScrollbarOverlayStyle> coreScrollbarStyle)
228 {
229     if (!coreScrollbarStyle)
230         return _WKOverlayScrollbarStyleAutomatic;
231     
232     switch (coreScrollbarStyle.value()) {
233     case WebCore::ScrollbarOverlayStyleDark:
234         return _WKOverlayScrollbarStyleDark;
235     case WebCore::ScrollbarOverlayStyleLight:
236         return _WKOverlayScrollbarStyleLight;
237     case WebCore::ScrollbarOverlayStyleDefault:
238         return _WKOverlayScrollbarStyleDefault;
239     }
240     ASSERT_NOT_REACHED();
241     return _WKOverlayScrollbarStyleAutomatic;
242 }
243
244 static Optional<WebCore::ScrollbarOverlayStyle> toCoreScrollbarStyle(_WKOverlayScrollbarStyle scrollbarStyle)
245 {
246     switch (scrollbarStyle) {
247     case _WKOverlayScrollbarStyleDark:
248         return WebCore::ScrollbarOverlayStyleDark;
249     case _WKOverlayScrollbarStyleLight:
250         return WebCore::ScrollbarOverlayStyleLight;
251     case _WKOverlayScrollbarStyleDefault:
252         return WebCore::ScrollbarOverlayStyleDefault;
253     case _WKOverlayScrollbarStyleAutomatic:
254         break;
255     }
256     return WTF::nullopt;
257 }
258 #endif
259
260 #define FORWARD_ACTION_TO_WKCONTENTVIEW(_action) \
261     - (void)_action:(id)sender \
262     { \
263         if (self.usesStandardContentView) \
264             [_contentView _action ## ForWebView:sender]; \
265     }
266
267 @implementation WKWebView {
268     std::unique_ptr<WebKit::NavigationState> _navigationState;
269     std::unique_ptr<WebKit::UIDelegate> _uiDelegate;
270     std::unique_ptr<WebKit::IconLoadingDelegate> _iconLoadingDelegate;
271
272     _WKRenderingProgressEvents _observedRenderingProgressEvents;
273
274     WeakObjCPtr<id <_WKInputDelegate>> _inputDelegate;
275
276     Optional<BOOL> _resolutionForShareSheetImmediateCompletionForTesting;
277     RetainPtr<WKSafeBrowsingWarning> _safeBrowsingWarning;
278
279 #if PLATFORM(IOS_FAMILY)
280     RetainPtr<_WKRemoteObjectRegistry> _remoteObjectRegistry;
281
282     RetainPtr<WKScrollView> _scrollView;
283     RetainPtr<WKContentView> _contentView;
284
285 #if ENABLE(FULLSCREEN_API)
286     RetainPtr<WKFullScreenWindowController> _fullScreenWindowController;
287 #endif
288
289     BOOL _overridesViewLayoutSize;
290     CGSize _viewLayoutSizeOverride;
291     Optional<WebCore::FloatSize> _lastSentViewLayoutSize;
292     BOOL _overridesMaximumUnobscuredSize;
293     CGSize _maximumUnobscuredSizeOverride;
294     Optional<WebCore::FloatSize> _lastSentMaximumUnobscuredSize;
295     CGRect _inputViewBounds;
296     CGFloat _viewportMetaTagWidth;
297     BOOL _viewportMetaTagWidthWasExplicit;
298     BOOL _viewportMetaTagCameFromImageDocument;
299     CGFloat _initialScaleFactor;
300     BOOL _fastClickingIsDisabled;
301
302     BOOL _allowsLinkPreview;
303
304     UIEdgeInsets _obscuredInsets;
305     BOOL _haveSetObscuredInsets;
306     BOOL _isChangingObscuredInsetsInteractively;
307
308     UIEdgeInsets _unobscuredSafeAreaInsets;
309     BOOL _haveSetUnobscuredSafeAreaInsets;
310     BOOL _avoidsUnsafeArea;
311     UIRectEdge _obscuredInsetEdgesAffectedBySafeArea;
312
313     UIInterfaceOrientation _interfaceOrientationOverride;
314     BOOL _overridesInterfaceOrientation;
315     Optional<int32_t> _lastSentDeviceOrientation;
316
317     BOOL _allowsViewportShrinkToFit;
318
319     BOOL _hasCommittedLoadForMainFrame;
320     BOOL _needsResetViewStateAfterCommitLoadForMainFrame;
321     uint64_t _firstPaintAfterCommitLoadTransactionID;
322     WebKit::DynamicViewportUpdateMode _dynamicViewportUpdateMode;
323     WebKit::DynamicViewportSizeUpdateID _currentDynamicViewportSizeUpdateID;
324     CATransform3D _resizeAnimationTransformAdjustments;
325     CGFloat _animatedResizeOriginalContentWidth;
326     RetainPtr<UIView> _resizeAnimationView;
327     CGFloat _lastAdjustmentForScroller;
328     Optional<CGRect> _frozenVisibleContentRect;
329     Optional<CGRect> _frozenUnobscuredContentRect;
330
331     BOOL _commitDidRestoreScrollPosition;
332     Optional<WebCore::FloatPoint> _scrollOffsetToRestore;
333     WebCore::FloatBoxExtent _obscuredInsetsWhenSaved;
334
335     Optional<WebCore::FloatPoint> _unobscuredCenterToRestore;
336     Optional<uint64_t> _firstTransactionIDAfterPageRestore;
337     double _scaleToRestore;
338
339     std::unique_ptr<WebKit::ViewGestureController> _gestureController;
340     BOOL _allowsBackForwardNavigationGestures;
341
342     RetainPtr<UIView <WKWebViewContentProvider>> _customContentView;
343     RetainPtr<UIView> _customContentFixedOverlayView;
344
345     RetainPtr<NSTimer> _enclosingScrollViewScrollTimer;
346     BOOL _didScrollSinceLastTimerFire;
347
348     WebCore::Color _scrollViewBackgroundColor;
349
350     // This value tracks the current adjustment added to the bottom inset due to the keyboard sliding out from the bottom
351     // when computing obscured content insets. This is used when updating the visible content rects where we should not
352     // include this adjustment.
353     CGFloat _totalScrollViewBottomInsetAdjustmentForKeyboard;
354     BOOL _currentlyAdjustingScrollViewInsetsForKeyboard;
355
356     BOOL _delayUpdateVisibleContentRects;
357     BOOL _hadDelayedUpdateVisibleContentRects;
358
359     BOOL _waitingForEndAnimatedResize;
360     BOOL _waitingForCommitAfterAnimatedResize;
361
362     Vector<WTF::Function<void ()>> _callbacksDeferredDuringResize;
363     RetainPtr<NSMutableArray> _stableStatePresentationUpdateCallbacks;
364
365     RetainPtr<WKPasswordView> _passwordView;
366
367     BOOL _hasScheduledVisibleRectUpdate;
368     BOOL _visibleContentRectUpdateScheduledFromScrollViewInStableState;
369     Vector<BlockPtr<void ()>> _visibleContentRectUpdateCallbacks;
370
371     _WKDragInteractionPolicy _dragInteractionPolicy;
372
373     // For release-logging for <rdar://problem/39281269>.
374     MonotonicTime _timeOfRequestForVisibleContentRectUpdate;
375     MonotonicTime _timeOfLastVisibleContentRectUpdate;
376
377     NSUInteger _focusPreservationCount;
378     NSUInteger _activeFocusedStateRetainCount;
379 #endif
380 #if PLATFORM(MAC)
381     std::unique_ptr<WebKit::WebViewImpl> _impl;
382     RetainPtr<WKTextFinderClient> _textFinderClient;
383 #endif
384     _WKSelectionAttributes _selectionAttributes;
385 }
386
387 - (instancetype)initWithFrame:(CGRect)frame
388 {
389     return [self initWithFrame:frame configuration:adoptNS([[WKWebViewConfiguration alloc] init]).get()];
390 }
391
392 - (BOOL)_isValid
393 {
394     return _page && _page->hasRunningProcess();
395 }
396
397 #if PLATFORM(IOS_FAMILY)
398 static int32_t deviceOrientationForUIInterfaceOrientation(UIInterfaceOrientation orientation)
399 {
400     switch (orientation) {
401     case UIInterfaceOrientationUnknown:
402     case UIInterfaceOrientationPortrait:
403         return 0;
404     case UIInterfaceOrientationPortraitUpsideDown:
405         return 180;
406     case UIInterfaceOrientationLandscapeLeft:
407         return -90;
408     case UIInterfaceOrientationLandscapeRight:
409         return 90;
410     }
411 }
412
413 static int32_t deviceOrientation()
414 {
415     return deviceOrientationForUIInterfaceOrientation([[UIApplication sharedApplication] statusBarOrientation]);
416 }
417
418 - (BOOL)_isShowingVideoPictureInPicture
419 {
420 #if !HAVE(AVKIT)
421     return false;
422 #else
423     if (!_page || !_page->videoFullscreenManager())
424         return false;
425
426     return _page->videoFullscreenManager()->hasMode(WebCore::HTMLMediaElementEnums::VideoFullscreenModePictureInPicture);
427 #endif
428 }
429
430 - (BOOL)_mayAutomaticallyShowVideoPictureInPicture
431 {
432 #if !HAVE(AVKIT)
433     return false;
434 #else
435     if (!_page || !_page->videoFullscreenManager())
436         return false;
437
438     return _page->videoFullscreenManager()->mayAutomaticallyShowVideoPictureInPicture();
439 #endif
440 }
441
442 static bool shouldAllowPictureInPictureMediaPlayback()
443 {
444     static bool shouldAllowPictureInPictureMediaPlayback = dyld_get_program_sdk_version() >= DYLD_IOS_VERSION_9_0;
445     return shouldAllowPictureInPictureMediaPlayback;
446 }
447
448 static bool shouldAllowSettingAnyXHRHeaderFromFileURLs()
449 {
450     static bool shouldAllowSettingAnyXHRHeaderFromFileURLs = (WebCore::IOSApplication::isCardiogram() || WebCore::IOSApplication::isNike()) && !linkedOnOrAfter(WebKit::SDKVersion::FirstThatDisallowsSettingAnyXHRHeaderFromFileURLs);
451     return shouldAllowSettingAnyXHRHeaderFromFileURLs;
452 }
453
454 - (void)_incrementFocusPreservationCount
455 {
456     ++_focusPreservationCount;
457 }
458
459 - (void)_decrementFocusPreservationCount
460 {
461     if (_focusPreservationCount)
462         --_focusPreservationCount;
463 }
464
465 - (void)_resetFocusPreservationCount
466 {
467     _focusPreservationCount = 0;
468 }
469
470 - (BOOL)_isRetainingActiveFocusedState
471 {
472     // Focus preservation count fulfills the same role as active focus state count.
473     // However, unlike active focus state, it may be reset to 0 without impacting the
474     // behavior of -_retainActiveFocusedState, and it's harmless to invoke
475     // -_decrementFocusPreservationCount after resetting the count to 0.
476     return _focusPreservationCount || _activeFocusedStateRetainCount;
477 }
478
479 #endif
480
481 #if USE(APPLE_INTERNAL_SDK)
482 #include <WebKitAdditions/WKWebViewInternalAdditions.mm>
483 #endif
484
485 static bool shouldRequireUserGestureToLoadVideo()
486 {
487 #if PLATFORM(IOS_FAMILY)
488     static bool shouldRequireUserGestureToLoadVideo = dyld_get_program_sdk_version() >= DYLD_IOS_VERSION_10_0;
489     return shouldRequireUserGestureToLoadVideo;
490 #else
491     return false;
492 #endif
493 }
494
495 #if PLATFORM(MAC)
496 static uint32_t convertUserInterfaceDirectionPolicy(WKUserInterfaceDirectionPolicy policy)
497 {
498     switch (policy) {
499     case WKUserInterfaceDirectionPolicyContent:
500         return static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::Content);
501     case WKUserInterfaceDirectionPolicySystem:
502         return static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::System);
503     }
504     return static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::Content);
505 }
506
507 static uint32_t convertSystemLayoutDirection(NSUserInterfaceLayoutDirection direction)
508 {
509     switch (direction) {
510     case NSUserInterfaceLayoutDirectionLeftToRight:
511         return static_cast<uint32_t>(WebCore::UserInterfaceLayoutDirection::LTR);
512     case NSUserInterfaceLayoutDirectionRightToLeft:
513         return static_cast<uint32_t>(WebCore::UserInterfaceLayoutDirection::RTL);
514     }
515     return static_cast<uint32_t>(WebCore::UserInterfaceLayoutDirection::LTR);
516 }
517
518 #endif // PLATFORM(MAC)
519
520 static void validate(WKWebViewConfiguration *configuration)
521 {
522     if (!configuration.processPool)
523         [NSException raise:NSInvalidArgumentException format:@"configuration.processPool is nil"];
524     
525     if (!configuration.preferences)
526         [NSException raise:NSInvalidArgumentException format:@"configuration.preferences is nil"];
527     
528     if (!configuration.userContentController)
529         [NSException raise:NSInvalidArgumentException format:@"configuration.userContentController is nil"];
530     
531     if (!configuration.websiteDataStore)
532         [NSException raise:NSInvalidArgumentException format:@"configuration.websiteDataStore is nil"];
533     
534     if (!configuration._visitedLinkStore)
535         [NSException raise:NSInvalidArgumentException format:@"configuration._visitedLinkStore is nil"];
536     
537 #if PLATFORM(IOS_FAMILY)
538     if (!configuration._contentProviderRegistry)
539         [NSException raise:NSInvalidArgumentException format:@"configuration._contentProviderRegistry is nil"];
540 #endif
541 }
542
543 - (void)_initializeWithConfiguration:(WKWebViewConfiguration *)configuration
544 {
545     if (!configuration)
546         [NSException raise:NSInvalidArgumentException format:@"Configuration cannot be nil"];
547
548     _configuration = adoptNS([configuration copy]);
549
550     if (WKWebView *relatedWebView = [_configuration _relatedWebView]) {
551         WKProcessPool *processPool = [_configuration processPool];
552         WKProcessPool *relatedWebViewProcessPool = [relatedWebView->_configuration processPool];
553         if (processPool && processPool != relatedWebViewProcessPool)
554             [NSException raise:NSInvalidArgumentException format:@"Related web view %@ has process pool %@ but configuration specifies a different process pool %@", relatedWebView, relatedWebViewProcessPool, configuration.processPool];
555         if ([relatedWebView->_configuration websiteDataStore] != [_configuration websiteDataStore])
556             [NSException raise:NSInvalidArgumentException format:@"Related web view %@ has data store %@ but configuration specifies a different data store %@", relatedWebView, [relatedWebView->_configuration websiteDataStore], [_configuration websiteDataStore]];
557
558         [_configuration setProcessPool:relatedWebViewProcessPool];
559     }
560
561     validate(_configuration.get());
562
563     WebKit::WebProcessPool& processPool = *[_configuration processPool]->_processPool;
564     processPool.setResourceLoadStatisticsEnabled(configuration.websiteDataStore._resourceLoadStatisticsEnabled);
565
566     auto pageConfiguration = [configuration copyPageConfiguration];
567
568     pageConfiguration->setProcessPool(&processPool);
569     pageConfiguration->setPreferences([_configuration preferences]->_preferences.get());
570     if (WKWebView *relatedWebView = [_configuration _relatedWebView])
571         pageConfiguration->setRelatedPage(relatedWebView->_page.get());
572
573     pageConfiguration->setUserContentController([_configuration userContentController]->_userContentControllerProxy.get());
574     pageConfiguration->setVisitedLinkStore([_configuration _visitedLinkStore]->_visitedLinkStore.get());
575     pageConfiguration->setWebsiteDataStore([_configuration websiteDataStore]->_websiteDataStore.get());
576     pageConfiguration->setDefaultWebsitePolicies([_configuration defaultWebpagePreferences]->_websitePolicies.get());
577
578 #if PLATFORM(MAC)
579     if (auto pageGroup = WebKit::toImpl([configuration _pageGroup])) {
580         pageConfiguration->setPageGroup(pageGroup);
581         pageConfiguration->setUserContentController(&pageGroup->userContentController());
582     } else
583 #endif
584     {
585         NSString *groupIdentifier = configuration._groupIdentifier;
586         if (groupIdentifier.length)
587             pageConfiguration->setPageGroup(WebKit::WebPageGroup::create(configuration._groupIdentifier).ptr());
588     }
589
590     pageConfiguration->setAdditionalSupportedImageTypes(WebCore::webCoreStringVectorFromNSStringArray([_configuration _additionalSupportedImageTypes]));
591
592     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::suppressesIncrementalRenderingKey(), WebKit::WebPreferencesStore::Value(!![_configuration suppressesIncrementalRendering]));
593
594     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldRespectImageOrientationKey(), WebKit::WebPreferencesStore::Value(!![_configuration _respectsImageOrientation]));
595 #if !PLATFORM(MAC)
596     // FIXME: Expose WKPreferences._shouldPrintBackgrounds on iOS, adopt it in all iOS clients, and remove this and WKWebViewConfiguration._printsBackgrounds\13\ 3.
597     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldPrintBackgroundsKey(), WebKit::WebPreferencesStore::Value(!![_configuration _printsBackgrounds]));
598 #endif
599     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::incrementalRenderingSuppressionTimeoutKey(), WebKit::WebPreferencesStore::Value([_configuration _incrementalRenderingSuppressionTimeout]));
600     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::javaScriptMarkupEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowsJavaScriptMarkup]));
601     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldConvertPositionStyleOnCopyKey(), WebKit::WebPreferencesStore::Value(!![_configuration _convertsPositionStyleOnCopy]));
602     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::httpEquivEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowsMetaRefresh]));
603     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowUniversalAccessFromFileURLsKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowUniversalAccessFromFileURLs]));
604     pageConfiguration->setWaitsForPaintAfterViewDidMoveToWindow([_configuration _waitsForPaintAfterViewDidMoveToWindow]);
605     pageConfiguration->setDrawsBackground([_configuration _drawsBackground]);
606     pageConfiguration->setControlledByAutomation([_configuration _isControlledByAutomation]);
607     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::incompleteImageBorderEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _incompleteImageBorderEnabled]));
608     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldDeferAsynchronousScriptsUntilAfterDocumentLoadKey(), WebKit::WebPreferencesStore::Value(!![_configuration _shouldDeferAsynchronousScriptsUntilAfterDocumentLoad]));
609
610 #if PLATFORM(MAC)
611     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::showsURLsInToolTipsEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _showsURLsInToolTips]));
612     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::serviceControlsEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _serviceControlsEnabled]));
613     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::imageControlsEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _imageControlsEnabled]));
614
615     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::userInterfaceDirectionPolicyKey(), WebKit::WebPreferencesStore::Value(convertUserInterfaceDirectionPolicy([_configuration userInterfaceDirectionPolicy])));
616     // We are in the View's initialization routine, so our client hasn't had time to set our user interface direction.
617     // Therefore, according to the docs[1], "this property contains the value reported by the app's userInterfaceLayoutDirection property."
618     // [1] http://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSView_Class/index.html#//apple_ref/doc/uid/20000014-SW222
619     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::systemLayoutDirectionKey(), WebKit::WebPreferencesStore::Value(convertSystemLayoutDirection(self.userInterfaceLayoutDirection)));
620 #endif
621
622 #if PLATFORM(IOS_FAMILY)
623     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsInlineMediaPlaybackKey(), WebKit::WebPreferencesStore::Value(!![_configuration allowsInlineMediaPlayback]));
624     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsInlineMediaPlaybackAfterFullscreenKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowsInlineMediaPlaybackAfterFullscreen]));
625     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::inlineMediaPlaybackRequiresPlaysInlineAttributeKey(), WebKit::WebPreferencesStore::Value(!![_configuration _inlineMediaPlaybackRequiresPlaysInlineAttribute]));
626     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsPictureInPictureMediaPlaybackKey(), WebKit::WebPreferencesStore::Value(!![_configuration allowsPictureInPictureMediaPlayback] && shouldAllowPictureInPictureMediaPlayback()));
627     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::userInterfaceDirectionPolicyKey(), WebKit::WebPreferencesStore::Value(static_cast<uint32_t>(WebCore::UserInterfaceDirectionPolicy::Content)));
628     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::systemLayoutDirectionKey(), WebKit::WebPreferencesStore::Value(static_cast<uint32_t>(WebCore::TextDirection::LTR)));
629     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowSettingAnyXHRHeaderFromFileURLsKey(), WebKit::WebPreferencesStore::Value(shouldAllowSettingAnyXHRHeaderFromFileURLs()));
630     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::shouldDecidePolicyBeforeLoadingQuickLookPreviewKey(), WebKit::WebPreferencesStore::Value(!![_configuration _shouldDecidePolicyBeforeLoadingQuickLookPreview]));
631 #if USE(SYSTEM_PREVIEW)
632     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::systemPreviewEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _systemPreviewEnabled]));
633 #endif
634 #endif
635
636     WKAudiovisualMediaTypes mediaTypesRequiringUserGesture = [_configuration mediaTypesRequiringUserActionForPlayback];
637     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::requiresUserGestureForVideoPlaybackKey(), WebKit::WebPreferencesStore::Value((mediaTypesRequiringUserGesture & WKAudiovisualMediaTypeVideo) == WKAudiovisualMediaTypeVideo));
638     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::requiresUserGestureForAudioPlaybackKey(), WebKit::WebPreferencesStore::Value(((mediaTypesRequiringUserGesture & WKAudiovisualMediaTypeAudio) == WKAudiovisualMediaTypeAudio)));
639     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::requiresUserGestureToLoadVideoKey(), WebKit::WebPreferencesStore::Value(shouldRequireUserGestureToLoadVideo()));
640     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::mainContentUserGestureOverrideEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _mainContentUserGestureOverrideEnabled]));
641     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::invisibleAutoplayNotPermittedKey(), WebKit::WebPreferencesStore::Value(!![_configuration _invisibleAutoplayNotPermitted]));
642     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::mediaDataLoadsAutomaticallyKey(), WebKit::WebPreferencesStore::Value(!![_configuration _mediaDataLoadsAutomatically]));
643     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::attachmentElementEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _attachmentElementEnabled]));
644
645 #if ENABLE(DATA_DETECTION) && PLATFORM(IOS_FAMILY)
646     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::dataDetectorTypesKey(), WebKit::WebPreferencesStore::Value(static_cast<uint32_t>(fromWKDataDetectorTypes([_configuration dataDetectorTypes]))));
647 #endif
648 #if ENABLE(WIRELESS_PLAYBACK_TARGET)
649     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowsAirPlayForMediaPlaybackKey(), WebKit::WebPreferencesStore::Value(!![_configuration allowsAirPlayForMediaPlayback]));
650 #endif
651
652 #if ENABLE(APPLE_PAY)
653     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::applePayEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _applePayEnabled]));
654 #endif
655
656     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::needsStorageAccessFromFileURLsQuirkKey(), WebKit::WebPreferencesStore::Value(!![_configuration _needsStorageAccessFromFileURLsQuirk]));
657     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::mediaContentTypesRequiringHardwareSupportKey(), WebKit::WebPreferencesStore::Value(String([_configuration _mediaContentTypesRequiringHardwareSupport])));
658     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::allowMediaContentTypesRequiringHardwareSupportAsFallbackKey(), WebKit::WebPreferencesStore::Value(!![_configuration _allowMediaContentTypesRequiringHardwareSupportAsFallback]));
659
660     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::colorFilterEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _colorFilterEnabled]));
661
662     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::editableImagesEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _editableImagesEnabled]));
663     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::undoManagerAPIEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _undoManagerAPIEnabled]));
664
665 #if ENABLE(LEGACY_ENCRYPTED_MEDIA)
666     pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::legacyEncryptedMediaAPIEnabledKey(), WebKit::WebPreferencesStore::Value(!![_configuration _legacyEncryptedMediaAPIEnabled]));
667 #endif
668
669 #if PLATFORM(IOS_FAMILY) && ENABLE(SERVICE_WORKER)
670     if (!WTF::processHasEntitlement("com.apple.developer.WebKit.ServiceWorkers"))
671         pageConfiguration->preferenceValues().set(WebKit::WebPreferencesKey::serviceWorkersEnabledKey(), WebKit::WebPreferencesStore::Value(false));
672 #endif
673
674 #if PLATFORM(IOS_FAMILY)
675     CGRect bounds = self.bounds;
676     _scrollView = adoptNS([[WKScrollView alloc] initWithFrame:bounds]);
677     [_scrollView setInternalDelegate:self];
678     [_scrollView setBouncesZoom:YES];
679
680     if ([_configuration _editableImagesEnabled])
681         [_scrollView panGestureRecognizer].allowedTouchTypes = @[ @(UITouchTypeDirect) ];
682
683     _avoidsUnsafeArea = YES;
684     [self _updateScrollViewInsetAdjustmentBehavior];
685
686     [self addSubview:_scrollView.get()];
687
688     static uint32_t programSDKVersion = dyld_get_program_sdk_version();
689     _allowsLinkPreview = programSDKVersion >= firstSDKVersionWithLinkPreviewEnabledByDefault;
690
691     _contentView = adoptNS([[WKContentView alloc] initWithFrame:bounds processPool:processPool configuration:pageConfiguration.copyRef() webView:self]);
692
693     _page = [_contentView page];
694     [self _dispatchSetDeviceOrientation:deviceOrientation()];
695     if (!self.opaque)
696         _page->setBackgroundColor(WebCore::Color(WebCore::Color::transparent));
697
698     [_contentView layer].anchorPoint = CGPointZero;
699     [_contentView setFrame:bounds];
700     [_scrollView addSubview:_contentView.get()];
701     [_scrollView addSubview:[_contentView unscaledView]];
702     [self _updateScrollViewBackground];
703     _obscuredInsetEdgesAffectedBySafeArea = UIRectEdgeTop | UIRectEdgeLeft | UIRectEdgeRight;
704
705     _viewportMetaTagWidth = WebCore::ViewportArguments::ValueAuto;
706     _initialScaleFactor = 1;
707
708     if (NSNumber *enabledValue = [[NSUserDefaults standardUserDefaults] objectForKey:@"WebKitFastClickingDisabled"])
709         _fastClickingIsDisabled = enabledValue.boolValue;
710     else {
711 #if PLATFORM(WATCHOS)
712         _fastClickingIsDisabled = YES;
713 #else
714         _fastClickingIsDisabled = NO;
715 #endif
716     }
717
718     [self _frameOrBoundsChanged];
719
720     NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
721     [center addObserver:self selector:@selector(_keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
722     [center addObserver:self selector:@selector(_keyboardDidChangeFrame:) name:UIKeyboardDidChangeFrameNotification object:nil];
723     [center addObserver:self selector:@selector(_keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
724     [center addObserver:self selector:@selector(_keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
725     [center addObserver:self selector:@selector(_keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
726     [center addObserver:self selector:@selector(_windowDidRotate:) name:UIWindowDidRotateNotification object:nil];
727     [center addObserver:self selector:@selector(_contentSizeCategoryDidChange:) name:UIContentSizeCategoryDidChangeNotification object:nil];
728     _page->contentSizeCategoryDidChange([self _contentSizeCategory]);
729
730     [center addObserver:self selector:@selector(_accessibilitySettingsDidChange:) name:UIAccessibilityGrayscaleStatusDidChangeNotification object:nil];
731     [center addObserver:self selector:@selector(_accessibilitySettingsDidChange:) name:UIAccessibilityInvertColorsStatusDidChangeNotification object:nil];
732     [center addObserver:self selector:@selector(_accessibilitySettingsDidChange:) name:UIAccessibilityReduceMotionStatusDidChangeNotification object:nil];
733
734     [[_configuration _contentProviderRegistry] addPage:*_page];
735     _page->setForceAlwaysUserScalable([_configuration ignoresViewportScaleLimits]);
736
737     CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), (__bridge const void *)(self), hardwareKeyboardAvailabilityChangedCallback, (CFStringRef)[NSString stringWithUTF8String:kGSEventHardwareKeyboardAvailabilityChangedNotification], nullptr, CFNotificationSuspensionBehaviorCoalesce);
738 #endif
739
740 #if PLATFORM(MAC)
741     _impl = std::make_unique<WebKit::WebViewImpl>(self, self, processPool, pageConfiguration.copyRef());
742     _page = &_impl->page();
743
744     _impl->setAutomaticallyAdjustsContentInsets(true);
745     _impl->setRequiresUserActionForEditingControlsManager([configuration _requiresUserActionForEditingControlsManager]);
746 #endif
747
748 #if ENABLE(ACCESSIBILITY_EVENTS)
749     // Check _AXSWebAccessibilityEventsEnabled here to avoid compiler optimizing
750     // out the null check of kAXSWebAccessibilityEventsEnabledNotification.
751     if (!isNullFunctionPointer(_AXSWebAccessibilityEventsEnabled))
752         CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), (__bridge const void *)(self), accessibilityEventsEnabledChangedCallback, kAXSWebAccessibilityEventsEnabledNotification, 0, CFNotificationSuspensionBehaviorDeliverImmediately);
753     [self _updateAccessibilityEventsEnabled];
754 #endif
755
756     if (NSString *applicationNameForUserAgent = configuration.applicationNameForUserAgent)
757         _page->setApplicationNameForUserAgent(applicationNameForUserAgent);
758
759     _navigationState = std::make_unique<WebKit::NavigationState>(self);
760     _page->setNavigationClient(_navigationState->createNavigationClient());
761
762     _uiDelegate = std::make_unique<WebKit::UIDelegate>(self);
763     _page->setFindClient(std::make_unique<WebKit::FindClient>(self));
764     _page->setDiagnosticLoggingClient(std::make_unique<WebKit::DiagnosticLoggingClient>(self));
765
766     _iconLoadingDelegate = std::make_unique<WebKit::IconLoadingDelegate>(self);
767
768     [self _setUpSQLiteDatabaseTrackerClient];
769
770     for (auto& pair : pageConfiguration->urlSchemeHandlers())
771         _page->setURLSchemeHandlerForScheme(WebKit::WebURLSchemeHandlerCocoa::create(static_cast<WebKit::WebURLSchemeHandlerCocoa&>(pair.value.get()).apiHandler()), pair.key);
772
773     pageToViewMap().add(_page.get(), self);
774
775 #if PLATFORM(IOS_FAMILY)
776     _dragInteractionPolicy = _WKDragInteractionPolicyDefault;
777
778     _timeOfRequestForVisibleContentRectUpdate = MonotonicTime::now();
779     _timeOfLastVisibleContentRectUpdate = MonotonicTime::now();
780 #if PLATFORM(WATCHOS)
781     _allowsViewportShrinkToFit = YES;
782 #else
783     _allowsViewportShrinkToFit = NO;
784 #endif
785 #endif // PLATFORM(IOS_FAMILY)
786 }
787
788 - (void)_setUpSQLiteDatabaseTrackerClient
789 {
790 #if PLATFORM(IOS_FAMILY)
791     WebBackgroundTaskController *controller = [WebBackgroundTaskController sharedController];
792     if (controller.backgroundTaskStartBlock)
793         return;
794
795     controller.backgroundTaskStartBlock = ^NSUInteger (void (^expirationHandler)())
796     {
797         return [[UIApplication sharedApplication] beginBackgroundTaskWithName:@"com.apple.WebKit.DatabaseActivity" expirationHandler:expirationHandler];
798     };
799     controller.backgroundTaskEndBlock = ^(UIBackgroundTaskIdentifier taskIdentifier)
800     {
801         [[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];
802     };
803     controller.invalidBackgroundTaskIdentifier = UIBackgroundTaskInvalid;
804
805     WebCore::SQLiteDatabaseTracker::setClient(&WebCore::WebSQLiteDatabaseTrackerClient::sharedWebSQLiteDatabaseTrackerClient());
806 #endif
807 }
808
809 - (instancetype)initWithFrame:(CGRect)frame configuration:(WKWebViewConfiguration *)configuration
810 {
811     if (!(self = [super initWithFrame:frame]))
812         return nil;
813
814     [self _initializeWithConfiguration:configuration];
815
816     return self;
817 }
818
819 - (instancetype)initWithCoder:(NSCoder *)coder
820 {
821     if (!(self = [super initWithCoder:coder]))
822         return nil;
823
824     WKWebViewConfiguration *configuration = decodeObjectOfClassForKeyFromCoder([WKWebViewConfiguration class], @"configuration", coder);
825     [self _initializeWithConfiguration:configuration];
826
827     self.allowsBackForwardNavigationGestures = [coder decodeBoolForKey:@"allowsBackForwardNavigationGestures"];
828     self.customUserAgent = decodeObjectOfClassForKeyFromCoder([NSString class], @"customUserAgent", coder);
829     self.allowsLinkPreview = [coder decodeBoolForKey:@"allowsLinkPreview"];
830
831 #if PLATFORM(MAC)
832     self.allowsMagnification = [coder decodeBoolForKey:@"allowsMagnification"];
833     self.magnification = [coder decodeDoubleForKey:@"magnification"];
834 #endif
835
836     return self;
837 }
838
839 - (void)encodeWithCoder:(NSCoder *)coder
840 {
841     [super encodeWithCoder:coder];
842
843     [coder encodeObject:_configuration.get() forKey:@"configuration"];
844
845     [coder encodeBool:self.allowsBackForwardNavigationGestures forKey:@"allowsBackForwardNavigationGestures"];
846     [coder encodeObject:self.customUserAgent forKey:@"customUserAgent"];
847     [coder encodeBool:self.allowsLinkPreview forKey:@"allowsLinkPreview"];
848
849 #if PLATFORM(MAC)
850     [coder encodeBool:self.allowsMagnification forKey:@"allowsMagnification"];
851     [coder encodeDouble:self.magnification forKey:@"magnification"];
852 #endif
853 }
854
855 - (void)dealloc
856 {
857 #if PLATFORM(MAC)
858     [_textFinderClient willDestroyView:self];
859 #endif
860
861 #if PLATFORM(IOS_FAMILY)
862     [_contentView _webViewDestroyed];
863
864     if (_remoteObjectRegistry)
865         _page->process().processPool().removeMessageReceiver(Messages::RemoteObjectRegistry::messageReceiverName(), _page->pageID());
866 #endif
867
868     _page->close();
869
870 #if PLATFORM(IOS_FAMILY)
871     [_remoteObjectRegistry _invalidate];
872     [[_configuration _contentProviderRegistry] removePage:*_page];
873     [[NSNotificationCenter defaultCenter] removeObserver:self];
874     [_scrollView setInternalDelegate:nil];
875
876     CFNotificationCenterRemoveObserver(CFNotificationCenterGetDarwinNotifyCenter(), (__bridge const void *)(self), (CFStringRef)[NSString stringWithUTF8String:kGSEventHardwareKeyboardAvailabilityChangedNotification], nullptr);
877 #endif
878
879 #if ENABLE(ACCESSIBILITY_EVENTS)
880     CFNotificationCenterRemoveObserver(CFNotificationCenterGetDarwinNotifyCenter(), (__bridge const void *)(self), nullptr, nullptr);
881 #endif
882
883     pageToViewMap().remove(_page.get());
884
885     [super dealloc];
886 }
887
888 - (id)valueForUndefinedKey:(NSString *)key {
889     if ([key isEqualToString:@"serverTrust"])
890         return (__bridge id)[self serverTrust];
891
892     return [super valueForUndefinedKey:key];
893 }
894
895 - (WKWebViewConfiguration *)configuration
896 {
897     return [[_configuration copy] autorelease];
898 }
899
900 - (WKBackForwardList *)backForwardList
901 {
902     return wrapper(_page->backForwardList());
903 }
904
905 - (id <WKNavigationDelegate>)navigationDelegate
906 {
907     return _navigationState->navigationDelegate().autorelease();
908 }
909
910 - (void)setNavigationDelegate:(id <WKNavigationDelegate>)navigationDelegate
911 {
912     _page->setNavigationClient(_navigationState->createNavigationClient());
913     _navigationState->setNavigationDelegate(navigationDelegate);
914 }
915
916 - (id <WKUIDelegate>)UIDelegate
917 {
918     return _uiDelegate->delegate().autorelease();
919 }
920
921 - (void)setUIDelegate:(id<WKUIDelegate>)UIDelegate
922 {
923     _uiDelegate->setDelegate(UIDelegate);
924 #if ENABLE(CONTEXT_MENUS)
925     _page->setContextMenuClient(_uiDelegate->createContextMenuClient());
926 #endif
927     _page->setUIClient(_uiDelegate->createUIClient());
928 }
929
930 - (id <_WKIconLoadingDelegate>)_iconLoadingDelegate
931 {
932     return _iconLoadingDelegate->delegate().autorelease();
933 }
934
935 - (void)_setIconLoadingDelegate:(id<_WKIconLoadingDelegate>)iconLoadingDelegate
936 {
937     _page->setIconLoadingClient(_iconLoadingDelegate->createIconLoadingClient());
938     _iconLoadingDelegate->setDelegate(iconLoadingDelegate);
939 }
940
941 - (WKNavigation *)loadRequest:(NSURLRequest *)request
942 {
943     return wrapper(_page->loadRequest(request));
944 }
945
946 - (WKNavigation *)loadFileURL:(NSURL *)URL allowingReadAccessToURL:(NSURL *)readAccessURL
947 {
948     if (![URL isFileURL])
949         [NSException raise:NSInvalidArgumentException format:@"%@ is not a file URL", URL];
950
951     if (![readAccessURL isFileURL])
952         [NSException raise:NSInvalidArgumentException format:@"%@ is not a file URL", readAccessURL];
953
954     return wrapper(_page->loadFile([URL _web_originalDataAsWTFString], [readAccessURL _web_originalDataAsWTFString]));
955 }
956
957 - (WKNavigation *)loadHTMLString:(NSString *)string baseURL:(NSURL *)baseURL
958 {
959     NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
960
961     return [self loadData:data MIMEType:@"text/html" characterEncodingName:@"UTF-8" baseURL:baseURL];
962 }
963
964 - (WKNavigation *)loadData:(NSData *)data MIMEType:(NSString *)MIMEType characterEncodingName:(NSString *)characterEncodingName baseURL:(NSURL *)baseURL
965 {
966     return wrapper(_page->loadData({ static_cast<const uint8_t*>(data.bytes), data.length }, MIMEType, characterEncodingName, baseURL.absoluteString));
967 }
968
969 - (WKNavigation *)goToBackForwardListItem:(WKBackForwardListItem *)item
970 {
971     return wrapper(_page->goToBackForwardItem(item._item));
972 }
973
974 - (NSString *)title
975 {
976     return _page->pageLoadState().title();
977 }
978
979 - (NSURL *)URL
980 {
981     return [NSURL _web_URLWithWTFString:_page->pageLoadState().activeURL()];
982 }
983
984 - (BOOL)isLoading
985 {
986     return _page->pageLoadState().isLoading();
987 }
988
989 - (double)estimatedProgress
990 {
991     return _page->pageLoadState().estimatedProgress();
992 }
993
994 - (BOOL)hasOnlySecureContent
995 {
996     return _page->pageLoadState().hasOnlySecureContent();
997 }
998
999 - (SecTrustRef)serverTrust
1000 {
1001 #if HAVE(SEC_TRUST_SERIALIZATION)
1002     auto certificateInfo = _page->pageLoadState().certificateInfo();
1003     if (!certificateInfo)
1004         return nil;
1005
1006     return certificateInfo->certificateInfo().trust();
1007 #else
1008     return nil;
1009 #endif
1010 }
1011
1012 - (BOOL)canGoBack
1013 {
1014     return _page->pageLoadState().canGoBack();
1015 }
1016
1017 - (BOOL)canGoForward
1018 {
1019     return _page->pageLoadState().canGoForward();
1020 }
1021
1022 - (WKNavigation *)goBack
1023 {
1024     if (self._safeBrowsingWarning)
1025         return [self reload];
1026     return wrapper(_page->goBack());
1027 }
1028
1029 - (WKNavigation *)goForward
1030 {
1031     return wrapper(_page->goForward());
1032 }
1033
1034 - (WKNavigation *)reload
1035 {
1036     OptionSet<WebCore::ReloadOption> reloadOptions;
1037     if (linkedOnOrAfter(WebKit::SDKVersion::FirstWithExpiredOnlyReloadBehavior))
1038         reloadOptions.add(WebCore::ReloadOption::ExpiredOnly);
1039
1040     return wrapper(_page->reload(reloadOptions));
1041 }
1042
1043 - (WKNavigation *)reloadFromOrigin
1044 {
1045     return wrapper(_page->reload(WebCore::ReloadOption::FromOrigin));
1046 }
1047
1048 - (void)stopLoading
1049 {
1050     _page->stopLoading();
1051 }
1052
1053 static WKErrorCode callbackErrorCode(WebKit::CallbackBase::Error error)
1054 {
1055     switch (error) {
1056     case WebKit::CallbackBase::Error::None:
1057         ASSERT_NOT_REACHED();
1058         return WKErrorUnknown;
1059
1060     case WebKit::CallbackBase::Error::Unknown:
1061         return WKErrorUnknown;
1062
1063     case WebKit::CallbackBase::Error::ProcessExited:
1064         return WKErrorWebContentProcessTerminated;
1065
1066     case WebKit::CallbackBase::Error::OwnerWasInvalidated:
1067         return WKErrorWebViewInvalidated;
1068     }
1069 }
1070
1071 - (void)evaluateJavaScript:(NSString *)javaScriptString completionHandler:(void (^)(id, NSError *))completionHandler
1072 {
1073     [self _evaluateJavaScript:javaScriptString forceUserGesture:YES completionHandler:completionHandler];
1074 }
1075
1076 - (void)_evaluateJavaScript:(NSString *)javaScriptString forceUserGesture:(BOOL)forceUserGesture completionHandler:(void (^)(id, NSError *))completionHandler
1077 {
1078     auto handler = adoptNS([completionHandler copy]);
1079
1080     _page->runJavaScriptInMainFrame(javaScriptString, forceUserGesture, [handler](API::SerializedScriptValue* serializedScriptValue, bool hadException, const WebCore::ExceptionDetails& details, WebKit::ScriptValueCallback::Error errorCode) {
1081         if (!handler)
1082             return;
1083
1084         if (errorCode != WebKit::ScriptValueCallback::Error::None) {
1085             auto error = createNSError(callbackErrorCode(errorCode));
1086             if (errorCode == WebKit::ScriptValueCallback::Error::OwnerWasInvalidated) {
1087                 // The OwnerWasInvalidated callback is synchronous. We don't want to call the block from within it
1088                 // because that can trigger re-entrancy bugs in WebKit.
1089                 // FIXME: It would be even better if GenericCallback did this for us.
1090                 dispatch_async(dispatch_get_main_queue(), [handler, error] {
1091                     auto rawHandler = (void (^)(id, NSError *))handler.get();
1092                     rawHandler(nil, error.get());
1093                 });
1094                 return;
1095             }
1096
1097             auto rawHandler = (void (^)(id, NSError *))handler.get();
1098             rawHandler(nil, error.get());
1099             return;
1100         }
1101
1102         auto rawHandler = (void (^)(id, NSError *))handler.get();
1103         if (hadException) {
1104             ASSERT(!serializedScriptValue);
1105
1106             RetainPtr<NSMutableDictionary> userInfo = adoptNS([[NSMutableDictionary alloc] init]);
1107
1108             [userInfo setObject:localizedDescriptionForErrorCode(WKErrorJavaScriptExceptionOccurred) forKey:NSLocalizedDescriptionKey];
1109             [userInfo setObject:static_cast<NSString *>(details.message) forKey:_WKJavaScriptExceptionMessageErrorKey];
1110             [userInfo setObject:@(details.lineNumber) forKey:_WKJavaScriptExceptionLineNumberErrorKey];
1111             [userInfo setObject:@(details.columnNumber) forKey:_WKJavaScriptExceptionColumnNumberErrorKey];
1112
1113             if (!details.sourceURL.isEmpty())
1114                 [userInfo setObject:[NSURL _web_URLWithWTFString:details.sourceURL] forKey:_WKJavaScriptExceptionSourceURLErrorKey];
1115
1116             rawHandler(nil, adoptNS([[NSError alloc] initWithDomain:WKErrorDomain code:WKErrorJavaScriptExceptionOccurred userInfo:userInfo.get()]).get());
1117             return;
1118         }
1119
1120         if (!serializedScriptValue) {
1121             rawHandler(nil, createNSError(WKErrorJavaScriptResultTypeIsUnsupported).get());
1122             return;
1123         }
1124
1125         id body = API::SerializedScriptValue::deserialize(serializedScriptValue->internalRepresentation(), 0);
1126         rawHandler(body, nil);
1127     });
1128 }
1129
1130 #if PLATFORM(MAC)
1131 - (void)takeSnapshotWithConfiguration:(WKSnapshotConfiguration *)snapshotConfiguration completionHandler:(void(^)(NSImage *, NSError *))completionHandler
1132 {
1133     CGRect rectInViewCoordinates = snapshotConfiguration && !CGRectIsNull(snapshotConfiguration.rect) ? snapshotConfiguration.rect : self.bounds;
1134     CGFloat snapshotWidth;
1135     if (snapshotConfiguration)
1136         snapshotWidth = snapshotConfiguration.snapshotWidth.doubleValue ?: rectInViewCoordinates.size.width;
1137     else
1138         snapshotWidth = self.bounds.size.width;
1139
1140     auto handler = makeBlockPtr(completionHandler);
1141     CGFloat imageScale = snapshotWidth / rectInViewCoordinates.size.width;
1142     CGFloat imageHeight = imageScale * rectInViewCoordinates.size.height;
1143
1144     // Need to scale by device scale factor or the image will be distorted.
1145     CGFloat deviceScale = _page->deviceScaleFactor();
1146     WebCore::IntSize bitmapSize(snapshotWidth, imageHeight);
1147     bitmapSize.scale(deviceScale, deviceScale);
1148
1149     // Software snapshot will not capture elements rendered with hardware acceleration (WebGL, video, etc).
1150     // This code doesn't consider snapshotConfiguration.afterScreenUpdates since the software snapshot always
1151     // contains recent updates. If we ever have a UI-side snapshot mechanism on macOS, we will need to factor
1152     // in snapshotConfiguration.afterScreenUpdates at that time.
1153     _page->takeSnapshot(WebCore::enclosingIntRect(rectInViewCoordinates), bitmapSize, WebKit::SnapshotOptionsInViewCoordinates, [handler, snapshotWidth, imageHeight](const WebKit::ShareableBitmap::Handle& imageHandle, WebKit::CallbackBase::Error errorCode) {
1154         if (errorCode != WebKit::ScriptValueCallback::Error::None) {
1155             auto error = createNSError(callbackErrorCode(errorCode));
1156             handler(nil, error.get());
1157             return;
1158         }
1159
1160         auto bitmap = WebKit::ShareableBitmap::create(imageHandle, WebKit::SharedMemory::Protection::ReadOnly);
1161         RetainPtr<CGImageRef> cgImage = bitmap ? bitmap->makeCGImage() : nullptr;
1162         RetainPtr<NSImage> nsImage = adoptNS([[NSImage alloc] initWithCGImage:cgImage.get() size:NSMakeSize(snapshotWidth, imageHeight)]);
1163         handler(nsImage.get(), nil);
1164     });
1165 }
1166
1167 #elif PLATFORM(IOS_FAMILY)
1168 - (void)takeSnapshotWithConfiguration:(WKSnapshotConfiguration *)snapshotConfiguration completionHandler:(void(^)(UIImage *, NSError *))completionHandler
1169 {
1170     CGRect rectInViewCoordinates = snapshotConfiguration && !CGRectIsNull(snapshotConfiguration.rect) ? snapshotConfiguration.rect : self.bounds;
1171     CGFloat snapshotWidth;
1172     if (snapshotConfiguration)
1173         snapshotWidth = snapshotConfiguration.snapshotWidth.doubleValue ?: rectInViewCoordinates.size.width;
1174     else
1175         snapshotWidth = self.bounds.size.width;
1176
1177     auto handler = makeBlockPtr(completionHandler);
1178     CGFloat deviceScale = _page->deviceScaleFactor();
1179     RetainPtr<WKWebView> strongSelf = self;
1180     auto callSnapshotRect = [strongSelf, rectInViewCoordinates, snapshotWidth, deviceScale, handler] {
1181         [strongSelf _snapshotRect:rectInViewCoordinates intoImageOfWidth:(snapshotWidth * deviceScale) completionHandler:[strongSelf, handler, deviceScale](CGImageRef snapshotImage) {
1182             RetainPtr<NSError> error;
1183             RetainPtr<UIImage> uiImage;
1184             
1185             if (!snapshotImage)
1186                 error = createNSError(WKErrorUnknown);
1187             else
1188                 uiImage = adoptNS([[UIImage alloc] initWithCGImage:snapshotImage scale:deviceScale orientation:UIImageOrientationUp]);
1189             
1190             handler(uiImage.get(), error.get());
1191         }];
1192     };
1193
1194     if ((snapshotConfiguration && !snapshotConfiguration.afterScreenUpdates) || !linkedOnOrAfter(WebKit::SDKVersion::FirstWithSnapshotAfterScreenUpdates)) {
1195         callSnapshotRect();
1196         return;
1197     }
1198
1199     _page->callAfterNextPresentationUpdate([callSnapshotRect = WTFMove(callSnapshotRect), handler](WebKit::CallbackBase::Error error) {
1200         if (error != WebKit::CallbackBase::Error::None) {
1201             handler(nil, createNSError(WKErrorUnknown).get());
1202             return;
1203         }
1204         callSnapshotRect();
1205     });
1206 }
1207 #endif
1208
1209 - (NSString *)customUserAgent
1210 {
1211     return _page->customUserAgent();
1212 }
1213
1214 - (void)setCustomUserAgent:(NSString *)customUserAgent
1215 {
1216     _page->setCustomUserAgent(customUserAgent);
1217 }
1218
1219 - (WKPageRef)_pageForTesting
1220 {
1221     return toAPI(_page.get());
1222 }
1223
1224 - (WebKit::WebPageProxy *)_page
1225 {
1226     return _page.get();
1227 }
1228
1229 - (BOOL)allowsLinkPreview
1230 {
1231 #if PLATFORM(MAC)
1232     return _impl->allowsLinkPreview();
1233 #elif PLATFORM(IOS_FAMILY)
1234     return _allowsLinkPreview;
1235 #endif
1236 }
1237
1238 - (void)setAllowsLinkPreview:(BOOL)allowsLinkPreview
1239 {
1240 #if PLATFORM(MAC)
1241     _impl->setAllowsLinkPreview(allowsLinkPreview);
1242     return;
1243 #elif PLATFORM(IOS_FAMILY)
1244     if (_allowsLinkPreview == allowsLinkPreview)
1245         return;
1246
1247     _allowsLinkPreview = allowsLinkPreview;
1248
1249 #if HAVE(LINK_PREVIEW)
1250     if (_allowsLinkPreview)
1251         [_contentView _registerPreview];
1252     else
1253         [_contentView _unregisterPreview];
1254 #endif // HAVE(LINK_PREVIEW)
1255 #endif // PLATFORM(IOS_FAMILY)
1256 }
1257
1258 - (CGSize)_viewportSizeForCSSViewportUnits
1259 {
1260     return _page->viewportSizeForCSSViewportUnits();
1261 }
1262
1263 - (void)_setViewportSizeForCSSViewportUnits:(CGSize)viewportSize
1264 {
1265     auto viewportSizeForViewportUnits = WebCore::IntSize(viewportSize);
1266     if (viewportSizeForViewportUnits.isEmpty())
1267         [NSException raise:NSInvalidArgumentException format:@"Viewport size should not be empty"];
1268
1269     _page->setViewportSizeForCSSViewportUnits(viewportSizeForViewportUnits);
1270 }
1271
1272 static NSTextAlignment nsTextAlignment(WebKit::TextAlignment alignment)
1273 {
1274     switch (alignment) {
1275     case WebKit::NoAlignment:
1276         return NSTextAlignmentNatural;
1277     case WebKit::LeftAlignment:
1278         return NSTextAlignmentLeft;
1279     case WebKit::RightAlignment:
1280         return NSTextAlignmentRight;
1281     case WebKit::CenterAlignment:
1282         return NSTextAlignmentCenter;
1283     case WebKit::JustifiedAlignment:
1284         return NSTextAlignmentJustified;
1285     }
1286     ASSERT_NOT_REACHED();
1287     return NSTextAlignmentNatural;
1288 }
1289
1290 static NSDictionary *dictionaryRepresentationForEditorState(const WebKit::EditorState& state)
1291 {
1292     if (state.isMissingPostLayoutData)
1293         return @{ @"post-layout-data" : @NO };
1294
1295     auto& postLayoutData = state.postLayoutData();
1296     return @{
1297         @"post-layout-data" : @YES,
1298         @"bold": postLayoutData.typingAttributes & WebKit::AttributeBold ? @YES : @NO,
1299         @"italic": postLayoutData.typingAttributes & WebKit::AttributeItalics ? @YES : @NO,
1300         @"underline": postLayoutData.typingAttributes & WebKit::AttributeUnderline ? @YES : @NO,
1301         @"text-alignment": @(nsTextAlignment(static_cast<WebKit::TextAlignment>(postLayoutData.textAlignment))),
1302         @"text-color": (NSString *)postLayoutData.textColor.cssText()
1303     };
1304 }
1305
1306 static _WKSelectionAttributes selectionAttributes(const WebKit::EditorState& editorState, _WKSelectionAttributes previousAttributes)
1307 {
1308     _WKSelectionAttributes attributes = _WKSelectionAttributeNoSelection;
1309     if (editorState.selectionIsNone)
1310         return attributes;
1311
1312     if (editorState.selectionIsRange)
1313         attributes |= _WKSelectionAttributeIsRange;
1314     else
1315         attributes |= _WKSelectionAttributeIsCaret;
1316
1317     if (!editorState.isMissingPostLayoutData) {
1318 #if PLATFORM(IOS_FAMILY)
1319         if (editorState.postLayoutData().atStartOfSentence)
1320             attributes |= _WKSelectionAttributeAtStartOfSentence;
1321 #endif
1322     } else if (previousAttributes & _WKSelectionAttributeAtStartOfSentence)
1323         attributes |= _WKSelectionAttributeAtStartOfSentence;
1324
1325     return attributes;
1326 }
1327
1328 - (void)_didChangeEditorState
1329 {
1330     auto newSelectionAttributes = selectionAttributes(_page->editorState(), _selectionAttributes);
1331     if (_selectionAttributes != newSelectionAttributes) {
1332         NSString *selectionAttributesKey = NSStringFromSelector(@selector(_selectionAttributes));
1333         [self willChangeValueForKey:selectionAttributesKey];
1334         _selectionAttributes = newSelectionAttributes;
1335         [self didChangeValueForKey:selectionAttributesKey];
1336     }
1337
1338     // FIXME: We should either rename -_webView:editorStateDidChange: to clarify that it's only intended for use when testing,
1339     // or remove it entirely and use -_webView:didChangeFontAttributes: instead once text alignment is supported in the set of
1340     // font attributes.
1341     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)self.UIDelegate;
1342     if ([uiDelegate respondsToSelector:@selector(_webView:editorStateDidChange:)])
1343         [uiDelegate _webView:self editorStateDidChange:dictionaryRepresentationForEditorState(_page->editorState())];
1344 }
1345
1346 - (_WKSelectionAttributes)_selectionAttributes
1347 {
1348     return _selectionAttributes;
1349 }
1350
1351 - (void)_showSafeBrowsingWarning:(const WebKit::SafeBrowsingWarning&)warning completionHandler:(CompletionHandler<void(Variant<WebKit::ContinueUnsafeLoad, URL>&&)>&&)completionHandler
1352 {
1353     _safeBrowsingWarning = adoptNS([[WKSafeBrowsingWarning alloc] initWithFrame:self.bounds safeBrowsingWarning:warning completionHandler:[weakSelf = WeakObjCPtr<WKWebView>(self), completionHandler = WTFMove(completionHandler)] (auto&& result) mutable {
1354         completionHandler(WTFMove(result));
1355         auto strongSelf = weakSelf.get();
1356         if (!strongSelf)
1357             return;
1358         bool navigatesFrame = WTF::switchOn(result,
1359             [] (WebKit::ContinueUnsafeLoad continueUnsafeLoad) { return continueUnsafeLoad == WebKit::ContinueUnsafeLoad::Yes; },
1360             [] (const URL&) { return true; }
1361         );
1362         bool forMainFrameNavigation = [strongSelf->_safeBrowsingWarning forMainFrameNavigation];
1363         if (navigatesFrame && forMainFrameNavigation) {
1364             // The safe browsing warning will be hidden once the next page is shown.
1365             return;
1366         }
1367         if (!navigatesFrame && strongSelf->_safeBrowsingWarning && !forMainFrameNavigation) {
1368             [strongSelf goBack];
1369             return;
1370         }
1371         [std::exchange(strongSelf->_safeBrowsingWarning, nullptr) removeFromSuperview];
1372     }]);
1373     [self addSubview:_safeBrowsingWarning.get()];
1374 }
1375
1376 - (void)_clearSafeBrowsingWarning
1377 {
1378     [std::exchange(_safeBrowsingWarning, nullptr) removeFromSuperview];
1379 }
1380
1381 - (void)_clearSafeBrowsingWarningIfForMainFrameNavigation
1382 {
1383     if ([_safeBrowsingWarning forMainFrameNavigation])
1384         [self _clearSafeBrowsingWarning];
1385 }
1386
1387 #if ENABLE(ATTACHMENT_ELEMENT)
1388
1389 - (void)_didInsertAttachment:(API::Attachment&)attachment withSource:(NSString *)source
1390 {
1391     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)self.UIDelegate;
1392     if ([uiDelegate respondsToSelector:@selector(_webView:didInsertAttachment:withSource:)])
1393         [uiDelegate _webView:self didInsertAttachment:wrapper(attachment) withSource:source];
1394 }
1395
1396 - (void)_didRemoveAttachment:(API::Attachment&)attachment
1397 {
1398     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)self.UIDelegate;
1399     if ([uiDelegate respondsToSelector:@selector(_webView:didRemoveAttachment:)])
1400         [uiDelegate _webView:self didRemoveAttachment:wrapper(attachment)];
1401 }
1402
1403 - (void)_didInvalidateDataForAttachment:(API::Attachment&)attachment
1404 {
1405     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)self.UIDelegate;
1406     if ([uiDelegate respondsToSelector:@selector(_webView:didInvalidateDataForAttachment:)])
1407         [uiDelegate _webView:self didInvalidateDataForAttachment:wrapper(attachment)];
1408 }
1409
1410 #endif // ENABLE(ATTACHMENT_ELEMENT)
1411
1412 #pragma mark iOS-specific methods
1413
1414 #if PLATFORM(IOS_FAMILY)
1415
1416 - (BOOL)_contentViewIsFirstResponder
1417 {
1418     return self._currentContentView.isFirstResponder;
1419 }
1420
1421 - (_WKDragInteractionPolicy)_dragInteractionPolicy
1422 {
1423     return _dragInteractionPolicy;
1424 }
1425
1426 - (void)_setDragInteractionPolicy:(_WKDragInteractionPolicy)policy
1427 {
1428     if (_dragInteractionPolicy == policy)
1429         return;
1430
1431     _dragInteractionPolicy = policy;
1432 #if ENABLE(DRAG_SUPPORT)
1433     [_contentView _didChangeDragInteractionPolicy];
1434 #endif
1435 }
1436
1437 - (void)_populateArchivedSubviews:(NSMutableSet *)encodedViews
1438 {
1439     [super _populateArchivedSubviews:encodedViews];
1440
1441     if (_scrollView)
1442         [encodedViews removeObject:_scrollView.get()];
1443     if (_customContentFixedOverlayView)
1444         [encodedViews removeObject:_customContentFixedOverlayView.get()];
1445 }
1446
1447 - (BOOL)_isBackground
1448 {
1449     if ([self _isDisplayingPDF])
1450         return [_customContentView web_isBackground];
1451     return [_contentView isBackground];
1452 }
1453
1454 - (void)setFrame:(CGRect)frame
1455 {
1456     CGRect oldFrame = self.frame;
1457     [super setFrame:frame];
1458
1459     if (!CGSizeEqualToSize(oldFrame.size, frame.size))
1460         [self _frameOrBoundsChanged];
1461 }
1462
1463 - (void)setBounds:(CGRect)bounds
1464 {
1465     CGRect oldBounds = self.bounds;
1466     [super setBounds:bounds];
1467     [_customContentFixedOverlayView setFrame:self.bounds];
1468
1469     if (!CGSizeEqualToSize(oldBounds.size, bounds.size))
1470         [self _frameOrBoundsChanged];
1471 }
1472
1473 - (void)layoutSubviews
1474 {
1475     [_safeBrowsingWarning setFrame:self.bounds];
1476     [super layoutSubviews];
1477     [self _frameOrBoundsChanged];
1478 }
1479
1480 - (UIScrollView *)scrollView
1481 {
1482     return _scrollView.get();
1483 }
1484
1485 ALLOW_DEPRECATED_DECLARATIONS_BEGIN
1486 - (WKBrowsingContextController *)browsingContextController
1487 {
1488     return [_contentView browsingContextController];
1489 }
1490 ALLOW_DEPRECATED_DECLARATIONS_END
1491
1492 - (BOOL)becomeFirstResponder
1493 {
1494     UIView *currentContentView = self._currentContentView;
1495     if (currentContentView == _contentView && [_contentView superview])
1496         return [_contentView becomeFirstResponderForWebView] || [super becomeFirstResponder];
1497
1498     return [currentContentView becomeFirstResponder] || [super becomeFirstResponder];
1499 }
1500
1501 - (BOOL)canBecomeFirstResponder
1502 {
1503     if (self._currentContentView == _contentView)
1504         return [_contentView canBecomeFirstResponderForWebView];
1505
1506     return YES;
1507 }
1508
1509 - (BOOL)resignFirstResponder
1510 {
1511     if ([_contentView isFirstResponder])
1512         return [_contentView resignFirstResponderForWebView];
1513
1514     return [super resignFirstResponder];
1515 }
1516
1517 FOR_EACH_WKCONTENTVIEW_ACTION(FORWARD_ACTION_TO_WKCONTENTVIEW)
1518
1519 - (BOOL)canPerformAction:(SEL)action withSender:(id)sender
1520 {
1521     #define FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW(_action) \
1522         if (action == @selector(_action:)) \
1523             return self.usesStandardContentView && [_contentView canPerformActionForWebView:action withSender:sender];
1524
1525     FOR_EACH_WKCONTENTVIEW_ACTION(FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW)
1526     FOR_EACH_PRIVATE_WKCONTENTVIEW_ACTION(FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW)
1527     FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW(_setTextColor:sender)
1528     FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW(_setFontSize:sender)
1529     FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW(_setFont:sender)
1530
1531     #undef FORWARD_CANPERFORMACTION_TO_WKCONTENTVIEW
1532
1533     return [super canPerformAction:action withSender:sender];
1534 }
1535
1536 - (id)targetForAction:(SEL)action withSender:(id)sender
1537 {
1538     #define FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW(_action) \
1539         if (action == @selector(_action:) && self.usesStandardContentView) \
1540             return [_contentView targetForActionForWebView:action withSender:sender];
1541
1542     FOR_EACH_WKCONTENTVIEW_ACTION(FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW)
1543     FOR_EACH_PRIVATE_WKCONTENTVIEW_ACTION(FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW)
1544     FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW(_setTextColor:sender)
1545     FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW(_setFontSize:sender)
1546     FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW(_setFont:sender)
1547
1548     #undef FORWARD_TARGETFORACTION_TO_WKCONTENTVIEW
1549
1550     return [super targetForAction:action withSender:sender];
1551 }
1552
1553 static inline CGFloat floorToDevicePixel(CGFloat input, float deviceScaleFactor)
1554 {
1555     return CGFloor(input * deviceScaleFactor) / deviceScaleFactor;
1556 }
1557
1558 static inline bool pointsEqualInDevicePixels(CGPoint a, CGPoint b, float deviceScaleFactor)
1559 {
1560     return fabs(a.x * deviceScaleFactor - b.x * deviceScaleFactor) < std::numeric_limits<float>::epsilon()
1561         && fabs(a.y * deviceScaleFactor - b.y * deviceScaleFactor) < std::numeric_limits<float>::epsilon();
1562 }
1563
1564 static CGSize roundScrollViewContentSize(const WebKit::WebPageProxy& page, CGSize contentSize)
1565 {
1566     float deviceScaleFactor = page.deviceScaleFactor();
1567     return CGSizeMake(floorToDevicePixel(contentSize.width, deviceScaleFactor), floorToDevicePixel(contentSize.height, deviceScaleFactor));
1568 }
1569
1570 - (UIView *)_currentContentView
1571 {
1572     return _customContentView ? [_customContentView web_contentView] : _contentView.get();
1573 }
1574
1575 - (WKWebViewContentProviderRegistry *)_contentProviderRegistry
1576 {
1577     return [_configuration _contentProviderRegistry];
1578 }
1579
1580 - (WKSelectionGranularity)_selectionGranularity
1581 {
1582     return [_configuration selectionGranularity];
1583 }
1584
1585 - (void)_setHasCustomContentView:(BOOL)pageHasCustomContentView loadedMIMEType:(const WTF::String&)mimeType
1586 {
1587     if (pageHasCustomContentView) {
1588         [_customContentView removeFromSuperview];
1589         [_customContentFixedOverlayView removeFromSuperview];
1590
1591         Class representationClass = [[_configuration _contentProviderRegistry] providerForMIMEType:mimeType];
1592         ASSERT(representationClass);
1593         _customContentView = adoptNS([[representationClass alloc] web_initWithFrame:self.bounds webView:self mimeType:mimeType]);
1594         _customContentFixedOverlayView = adoptNS([[UIView alloc] initWithFrame:self.bounds]);
1595         [_customContentFixedOverlayView layer].name = @"CustomContentFixedOverlay";
1596         [_customContentFixedOverlayView setUserInteractionEnabled:NO];
1597
1598         [[_contentView unscaledView] removeFromSuperview];
1599         [_contentView removeFromSuperview];
1600         [_scrollView addSubview:_customContentView.get()];
1601         [self addSubview:_customContentFixedOverlayView.get()];
1602
1603         [_customContentView web_setMinimumSize:self.bounds.size];
1604         [_customContentView web_setFixedOverlayView:_customContentFixedOverlayView.get()];
1605
1606         _scrollViewBackgroundColor = WebCore::Color();
1607         [_scrollView setContentOffset:[self _initialContentOffsetForScrollView]];
1608
1609         [self _setAvoidsUnsafeArea:NO];
1610     } else if (_customContentView) {
1611         [_customContentView removeFromSuperview];
1612         _customContentView = nullptr;
1613
1614         [_customContentFixedOverlayView removeFromSuperview];
1615         _customContentFixedOverlayView = nullptr;
1616
1617         [_scrollView addSubview:_contentView.get()];
1618         [_scrollView addSubview:[_contentView unscaledView]];
1619         [_scrollView setContentSize:roundScrollViewContentSize(*_page, [_contentView frame].size)];
1620
1621         [_customContentFixedOverlayView setFrame:self.bounds];
1622         [self addSubview:_customContentFixedOverlayView.get()];
1623     }
1624
1625     if (self.isFirstResponder) {
1626         UIView *currentContentView = self._currentContentView;
1627         if (currentContentView == _contentView ? [_contentView canBecomeFirstResponderForWebView] : currentContentView.canBecomeFirstResponder)
1628             [currentContentView becomeFirstResponder];
1629     }
1630 }
1631
1632 - (void)_didFinishLoadingDataForCustomContentProviderWithSuggestedFilename:(const String&)suggestedFilename data:(NSData *)data
1633 {
1634     ASSERT(_customContentView);
1635     [_customContentView web_setContentProviderData:data suggestedFilename:suggestedFilename];
1636
1637     // FIXME: It may make more sense for custom content providers to invoke this when they're ready,
1638     // because there's no guarantee that all custom content providers will lay out synchronously.
1639     _page->didLayoutForCustomContentProvider();
1640 }
1641
1642 - (void)_handleKeyUIEvent:(::UIEvent *)event
1643 {
1644     // We only want to handle key events from the hardware keyboard when we are
1645     // first responder and a custom content view is installed; otherwise,
1646     // WKContentView will be the first responder and expects to get key events directly.
1647     if ([self isFirstResponder] && event._hidEvent) {
1648         if ([_customContentView respondsToSelector:@selector(web_handleKeyEvent:)]) {
1649             if ([_customContentView web_handleKeyEvent:event])
1650                 return;
1651         }
1652     }
1653
1654     [super _handleKeyUIEvent:event];
1655 }
1656
1657 - (void)_willInvokeUIScrollViewDelegateCallback
1658 {
1659     _delayUpdateVisibleContentRects = YES;
1660 }
1661
1662 - (void)_didInvokeUIScrollViewDelegateCallback
1663 {
1664     _delayUpdateVisibleContentRects = NO;
1665     if (_hadDelayedUpdateVisibleContentRects) {
1666         _hadDelayedUpdateVisibleContentRects = NO;
1667         [self _scheduleVisibleContentRectUpdate];
1668     }
1669 }
1670
1671 static CGFloat contentZoomScale(WKWebView *webView)
1672 {
1673     CGFloat scale = webView._currentContentView.layer.affineTransform.a;
1674     ASSERT(scale == [webView->_scrollView zoomScale]);
1675     return scale;
1676 }
1677
1678 static WebCore::Color baseScrollViewBackgroundColor(WKWebView *webView)
1679 {
1680     if (webView->_customContentView)
1681         return [webView->_customContentView backgroundColor].CGColor;
1682
1683     if (webView->_gestureController) {
1684         WebCore::Color color = webView->_gestureController->backgroundColorForCurrentSnapshot();
1685         if (color.isValid())
1686             return color;
1687     }
1688
1689     return webView->_page->pageExtendedBackgroundColor();
1690 }
1691
1692 static WebCore::Color scrollViewBackgroundColor(WKWebView *webView)
1693 {
1694     if (!webView.opaque)
1695         return WebCore::Color::transparent;
1696
1697     WebCore::Color color = baseScrollViewBackgroundColor(webView);
1698
1699     if (!color.isValid())
1700         color = WebCore::Color::white;
1701
1702     CGFloat zoomScale = contentZoomScale(webView);
1703     CGFloat minimumZoomScale = [webView->_scrollView minimumZoomScale];
1704     if (zoomScale < minimumZoomScale) {
1705         CGFloat slope = 12;
1706         CGFloat opacity = std::max<CGFloat>(1 - slope * (minimumZoomScale - zoomScale), 0);
1707         color = WebCore::colorWithOverrideAlpha(color.rgb(), opacity);
1708     }
1709
1710     return color;
1711 }
1712
1713 - (void)_updateScrollViewBackground
1714 {
1715     WebCore::Color color = scrollViewBackgroundColor(self);
1716
1717     if (_scrollViewBackgroundColor == color)
1718         return;
1719
1720     _scrollViewBackgroundColor = color;
1721
1722     auto uiBackgroundColor = adoptNS([[UIColor alloc] initWithCGColor:cachedCGColor(color)]);
1723     [_scrollView setBackgroundColor:uiBackgroundColor.get()];
1724
1725     // Update the indicator style based on the lightness/darkness of the background color.
1726     double hue, saturation, lightness;
1727     color.getHSL(hue, saturation, lightness);
1728     if (lightness <= .5 && color.isVisible())
1729         [_scrollView setIndicatorStyle:UIScrollViewIndicatorStyleWhite];
1730     else
1731         [_scrollView setIndicatorStyle:UIScrollViewIndicatorStyleDefault];
1732 }
1733
1734 - (void)_videoControlsManagerDidChange
1735 {
1736 #if ENABLE(FULLSCREEN_API)
1737     if (_fullScreenWindowController)
1738         [_fullScreenWindowController videoControlsManagerDidChange];
1739 #endif
1740 }
1741
1742 - (CGPoint)_initialContentOffsetForScrollView
1743 {
1744     auto combinedUnobscuredAndScrollViewInset = [self _computedContentInset];
1745     return CGPointMake(-combinedUnobscuredAndScrollViewInset.left, -combinedUnobscuredAndScrollViewInset.top);
1746 }
1747
1748 - (CGPoint)_contentOffsetAdjustedForObscuredInset:(CGPoint)point
1749 {
1750     CGPoint result = point;
1751     UIEdgeInsets contentInset = [self _computedObscuredInset];
1752
1753     result.x -= contentInset.left;
1754     result.y -= contentInset.top;
1755
1756     return result;
1757 }
1758
1759 - (UIRectEdge)_effectiveObscuredInsetEdgesAffectedBySafeArea
1760 {
1761     if (![self usesStandardContentView])
1762         return UIRectEdgeAll;
1763     return _obscuredInsetEdgesAffectedBySafeArea;
1764 }
1765
1766 - (UIEdgeInsets)_computedObscuredInset
1767 {
1768     if (!linkedOnOrAfter(WebKit::SDKVersion::FirstWhereScrollViewContentInsetsAreNotObscuringInsets)) {
1769         // For binary compability with third party apps, treat scroll view content insets as obscuring insets when the app is compiled
1770         // against a WebKit version without the fix in r229641.
1771         return [self _computedContentInset];
1772     }
1773
1774     if (_haveSetObscuredInsets)
1775         return _obscuredInsets;
1776
1777 #if PLATFORM(IOS)
1778     if (self._safeAreaShouldAffectObscuredInsets)
1779         return UIEdgeInsetsAdd(UIEdgeInsetsZero, self._scrollViewSystemContentInset, self._effectiveObscuredInsetEdgesAffectedBySafeArea);
1780 #endif
1781
1782     return UIEdgeInsetsZero;
1783 }
1784
1785 - (UIEdgeInsets)_computedContentInset
1786 {
1787     if (_haveSetObscuredInsets)
1788         return _obscuredInsets;
1789
1790     UIEdgeInsets insets = [_scrollView contentInset];
1791
1792 #if PLATFORM(IOS)
1793     if (self._safeAreaShouldAffectObscuredInsets)
1794         insets = UIEdgeInsetsAdd(insets, self._scrollViewSystemContentInset, self._effectiveObscuredInsetEdgesAffectedBySafeArea);
1795 #endif
1796
1797     return insets;
1798 }
1799
1800 - (UIEdgeInsets)_computedUnobscuredSafeAreaInset
1801 {
1802     if (_haveSetUnobscuredSafeAreaInsets)
1803         return _unobscuredSafeAreaInsets;
1804
1805 #if PLATFORM(IOS)
1806     if (!self._safeAreaShouldAffectObscuredInsets)
1807         return self.safeAreaInsets;
1808 #endif
1809
1810     return UIEdgeInsetsZero;
1811 }
1812
1813 - (void)_processWillSwapOrDidExit
1814 {
1815     // FIXME: Which ones of these need to be done in the process swap case and which ones in the exit case?
1816     [self _hidePasswordView];
1817     [self _cancelAnimatedResize];
1818
1819     _viewportMetaTagWidth = WebCore::ViewportArguments::ValueAuto;
1820     _initialScaleFactor = 1;
1821     _hasCommittedLoadForMainFrame = NO;
1822     _needsResetViewStateAfterCommitLoadForMainFrame = NO;
1823     _dynamicViewportUpdateMode = WebKit::DynamicViewportUpdateMode::NotResizing;
1824     _waitingForEndAnimatedResize = NO;
1825     _waitingForCommitAfterAnimatedResize = NO;
1826     _animatedResizeOriginalContentWidth = 0;
1827     [_contentView setHidden:NO];
1828     _scrollOffsetToRestore = WTF::nullopt;
1829     _unobscuredCenterToRestore = WTF::nullopt;
1830     _scrollViewBackgroundColor = WebCore::Color();
1831     _delayUpdateVisibleContentRects = NO;
1832     _hadDelayedUpdateVisibleContentRects = NO;
1833     _currentlyAdjustingScrollViewInsetsForKeyboard = NO;
1834     _lastSentViewLayoutSize = WTF::nullopt;
1835     _lastSentMaximumUnobscuredSize = WTF::nullopt;
1836     _lastSentDeviceOrientation = WTF::nullopt;
1837
1838     _frozenVisibleContentRect = WTF::nullopt;
1839     _frozenUnobscuredContentRect = WTF::nullopt;
1840
1841     _firstPaintAfterCommitLoadTransactionID = 0;
1842     _firstTransactionIDAfterPageRestore = WTF::nullopt;
1843
1844     _hasScheduledVisibleRectUpdate = NO;
1845     _commitDidRestoreScrollPosition = NO;
1846
1847     _avoidsUnsafeArea = YES;
1848 }
1849
1850 - (void)_processWillSwap
1851 {
1852     RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _processWillSwap]", self);
1853     [self _processWillSwapOrDidExit];
1854     if (_gestureController)
1855         _gestureController->disconnectFromProcess();
1856 }
1857
1858 - (void)_processDidExit
1859 {
1860     RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _processDidExit]", self);
1861
1862     [self _processWillSwapOrDidExit];
1863
1864     [_contentView setFrame:self.bounds];
1865     [_scrollView setBackgroundColor:[UIColor whiteColor]];
1866     [_scrollView setContentOffset:[self _initialContentOffsetForScrollView]];
1867     [_scrollView setZoomScale:1];
1868     _gestureController = nullptr;
1869 }
1870
1871 - (void)_didRelaunchProcess
1872 {
1873     RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _didRelaunchProcess]", self);
1874     _hasScheduledVisibleRectUpdate = NO;
1875     _visibleContentRectUpdateScheduledFromScrollViewInStableState = YES;
1876     if (_gestureController)
1877         _gestureController->connectToProcess();
1878 }
1879
1880 - (void)_didCommitLoadForMainFrame
1881 {
1882     _firstPaintAfterCommitLoadTransactionID = downcast<WebKit::RemoteLayerTreeDrawingAreaProxy>(*_page->drawingArea()).nextLayerTreeTransactionID();
1883
1884     _hasCommittedLoadForMainFrame = YES;
1885     _needsResetViewStateAfterCommitLoadForMainFrame = YES;
1886
1887     [_scrollView _stopScrollingAndZoomingAnimations];
1888 }
1889
1890 static CGPoint contentOffsetBoundedInValidRange(UIScrollView *scrollView, CGPoint contentOffset)
1891 {
1892 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
1893     UIEdgeInsets contentInsets = scrollView.adjustedContentInset;
1894 #else
1895     UIEdgeInsets contentInsets = scrollView.contentInset;
1896 #endif
1897
1898     CGSize contentSize = scrollView.contentSize;
1899     CGSize scrollViewSize = scrollView.bounds.size;
1900
1901     CGPoint minimumContentOffset = CGPointMake(-contentInsets.left, -contentInsets.top);
1902     CGPoint maximumContentOffset = CGPointMake(std::max(minimumContentOffset.x, contentSize.width + contentInsets.right - scrollViewSize.width), std::max(minimumContentOffset.y, contentSize.height + contentInsets.bottom - scrollViewSize.height));
1903
1904     return CGPointMake(std::max(std::min(contentOffset.x, maximumContentOffset.x), minimumContentOffset.x), std::max(std::min(contentOffset.y, maximumContentOffset.y), minimumContentOffset.y));
1905 }
1906
1907 static void changeContentOffsetBoundedInValidRange(UIScrollView *scrollView, WebCore::FloatPoint contentOffset)
1908 {
1909     scrollView.contentOffset = contentOffsetBoundedInValidRange(scrollView, contentOffset);
1910 }
1911
1912 - (WebCore::FloatRect)visibleRectInViewCoordinates
1913 {
1914     WebCore::FloatRect bounds = self.bounds;
1915     bounds.moveBy([_scrollView contentOffset]);
1916     WebCore::FloatRect contentViewBounds = [_contentView bounds];
1917     bounds.intersect(contentViewBounds);
1918     return bounds;
1919 }
1920
1921 // WebCore stores the page scale factor as float instead of double. When we get a scale from WebCore,
1922 // we need to ignore differences that are within a small rounding error on floats.
1923 static inline bool areEssentiallyEqualAsFloat(float a, float b)
1924 {
1925     return WTF::areEssentiallyEqual(a, b);
1926 }
1927
1928 - (void)_didCommitLayerTreeDuringAnimatedResize:(const WebKit::RemoteLayerTreeTransaction&)layerTreeTransaction
1929 {
1930     auto updateID = layerTreeTransaction.dynamicViewportSizeUpdateID();
1931     if (updateID && *updateID == _currentDynamicViewportSizeUpdateID) {
1932         double pageScale = layerTreeTransaction.pageScaleFactor();
1933         WebCore::IntPoint scrollPosition = layerTreeTransaction.scrollPosition();
1934
1935         CGFloat animatingScaleTarget = [[_resizeAnimationView layer] transform].m11;
1936         double currentTargetScale = animatingScaleTarget * [[_contentView layer] transform].m11;
1937         double scale = pageScale / currentTargetScale;
1938         _resizeAnimationTransformAdjustments = CATransform3DMakeScale(scale, scale, 1);
1939
1940         CGPoint newContentOffset = [self _contentOffsetAdjustedForObscuredInset:CGPointMake(scrollPosition.x() * pageScale, scrollPosition.y() * pageScale)];
1941         CGPoint currentContentOffset = [_scrollView contentOffset];
1942
1943         _resizeAnimationTransformAdjustments.m41 = (currentContentOffset.x - newContentOffset.x) / animatingScaleTarget;
1944         _resizeAnimationTransformAdjustments.m42 = (currentContentOffset.y - newContentOffset.y) / animatingScaleTarget;
1945
1946         [_resizeAnimationView layer].sublayerTransform = _resizeAnimationTransformAdjustments;
1947
1948         // If we've already passed endAnimatedResize, immediately complete
1949         // the resize when we have an up-to-date layer tree. Otherwise,
1950         // we will defer completion until endAnimatedResize.
1951         _waitingForCommitAfterAnimatedResize = NO;
1952         if (!_waitingForEndAnimatedResize)
1953             [self _didCompleteAnimatedResize];
1954
1955         return;
1956     }
1957
1958     // If a commit arrives during the live part of a resize but before the
1959     // layer tree takes the current resize into account, it could change the
1960     // WKContentView's size. Update the resizeAnimationView's scale to ensure
1961     // we continue to fill the width of the resize target.
1962
1963     if (_waitingForEndAnimatedResize)
1964         return;
1965
1966     auto newViewLayoutSize = [self activeViewLayoutSize:self.bounds];
1967     CGFloat resizeAnimationViewScale = _animatedResizeOriginalContentWidth / newViewLayoutSize.width();
1968     [[_resizeAnimationView layer] setSublayerTransform:CATransform3DMakeScale(resizeAnimationViewScale, resizeAnimationViewScale, 1)];
1969 }
1970
1971 - (void)_didCommitLayerTree:(const WebKit::RemoteLayerTreeTransaction&)layerTreeTransaction
1972 {
1973     if (![self usesStandardContentView])
1974         return;
1975
1976     LOG_WITH_STREAM(VisibleRects, stream << "-[WKWebView " << _page->pageID() << " _didCommitLayerTree:] transactionID " <<  layerTreeTransaction.transactionID() << " _dynamicViewportUpdateMode " << (int)_dynamicViewportUpdateMode);
1977
1978     bool needUpdateVisibleContentRects = _page->updateLayoutViewportParameters(layerTreeTransaction);
1979
1980     if (_dynamicViewportUpdateMode != WebKit::DynamicViewportUpdateMode::NotResizing) {
1981         [self _didCommitLayerTreeDuringAnimatedResize:layerTreeTransaction];
1982         return;
1983     }
1984
1985     if (_resizeAnimationView)
1986         RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _didCommitLayerTree:] - dynamicViewportUpdateMode is NotResizing, but still have a live resizeAnimationView (unpaired begin/endAnimatedResize?)", self);
1987
1988     CGSize newContentSize = roundScrollViewContentSize(*_page, [_contentView frame].size);
1989     [_scrollView _setContentSizePreservingContentOffsetDuringRubberband:newContentSize];
1990
1991     [_scrollView setMinimumZoomScale:layerTreeTransaction.minimumScaleFactor()];
1992     [_scrollView setMaximumZoomScale:layerTreeTransaction.maximumScaleFactor()];
1993     [_scrollView setZoomEnabled:layerTreeTransaction.allowsUserScaling()];
1994     if (!layerTreeTransaction.scaleWasSetByUIProcess() && ![_scrollView isZooming] && ![_scrollView isZoomBouncing] && ![_scrollView _isAnimatingZoom] && [_scrollView zoomScale] != layerTreeTransaction.pageScaleFactor()) {
1995         LOG_WITH_STREAM(VisibleRects, stream << " updating scroll view with pageScaleFactor " << layerTreeTransaction.pageScaleFactor());
1996         [_scrollView setZoomScale:layerTreeTransaction.pageScaleFactor()];
1997     }
1998
1999     _viewportMetaTagWidth = layerTreeTransaction.viewportMetaTagWidth();
2000     _viewportMetaTagWidthWasExplicit = layerTreeTransaction.viewportMetaTagWidthWasExplicit();
2001     _viewportMetaTagCameFromImageDocument = layerTreeTransaction.viewportMetaTagCameFromImageDocument();
2002     _initialScaleFactor = layerTreeTransaction.initialScaleFactor();
2003     if (_page->inStableState() && layerTreeTransaction.isInStableState() && [_stableStatePresentationUpdateCallbacks count]) {
2004         for (dispatch_block_t action in _stableStatePresentationUpdateCallbacks.get())
2005             action();
2006
2007         [_stableStatePresentationUpdateCallbacks removeAllObjects];
2008         _stableStatePresentationUpdateCallbacks = nil;
2009     }
2010
2011     if (![_contentView _mayDisableDoubleTapGesturesDuringSingleTap])
2012         [_contentView _setDoubleTapGesturesEnabled:self._allowsDoubleTapGestures];
2013
2014     [self _updateScrollViewBackground];
2015     [self _setAvoidsUnsafeArea:layerTreeTransaction.avoidsUnsafeArea()];
2016
2017     if (_gestureController)
2018         _gestureController->setRenderTreeSize(layerTreeTransaction.renderTreeSize());
2019
2020     if (_needsResetViewStateAfterCommitLoadForMainFrame && layerTreeTransaction.transactionID() >= _firstPaintAfterCommitLoadTransactionID) {
2021         _needsResetViewStateAfterCommitLoadForMainFrame = NO;
2022         [_scrollView setContentOffset:[self _initialContentOffsetForScrollView]];
2023         if (_observedRenderingProgressEvents & _WKRenderingProgressEventFirstPaint)
2024             _navigationState->didFirstPaint();
2025
2026         needUpdateVisibleContentRects = true;
2027     }
2028
2029     if (_firstTransactionIDAfterPageRestore && layerTreeTransaction.transactionID() >= _firstTransactionIDAfterPageRestore.value()) {
2030         if (_scrollOffsetToRestore) {
2031             WebCore::FloatPoint scaledScrollOffset = _scrollOffsetToRestore.value();
2032             _scrollOffsetToRestore = WTF::nullopt;
2033
2034             if (areEssentiallyEqualAsFloat(contentZoomScale(self), _scaleToRestore)) {
2035                 scaledScrollOffset.scale(_scaleToRestore);
2036                 WebCore::FloatPoint contentOffsetInScrollViewCoordinates = scaledScrollOffset - WebCore::FloatSize(_obscuredInsetsWhenSaved.left(), _obscuredInsetsWhenSaved.top());
2037
2038                 changeContentOffsetBoundedInValidRange(_scrollView.get(), contentOffsetInScrollViewCoordinates);
2039                 _commitDidRestoreScrollPosition = YES;
2040             }
2041
2042             needUpdateVisibleContentRects = true;
2043         }
2044
2045         if (_unobscuredCenterToRestore) {
2046             WebCore::FloatPoint unobscuredCenterToRestore = _unobscuredCenterToRestore.value();
2047             _unobscuredCenterToRestore = WTF::nullopt;
2048
2049             if (areEssentiallyEqualAsFloat(contentZoomScale(self), _scaleToRestore)) {
2050                 CGRect unobscuredRect = UIEdgeInsetsInsetRect(self.bounds, _obscuredInsets);
2051                 WebCore::FloatSize unobscuredContentSizeAtNewScale = WebCore::FloatSize(unobscuredRect.size) / _scaleToRestore;
2052                 WebCore::FloatPoint topLeftInDocumentCoordinates = unobscuredCenterToRestore - unobscuredContentSizeAtNewScale / 2;
2053
2054                 topLeftInDocumentCoordinates.scale(_scaleToRestore);
2055                 topLeftInDocumentCoordinates.moveBy(WebCore::FloatPoint(-_obscuredInsets.left, -_obscuredInsets.top));
2056
2057                 changeContentOffsetBoundedInValidRange(_scrollView.get(), topLeftInDocumentCoordinates);
2058             }
2059
2060             needUpdateVisibleContentRects = true;
2061         }
2062
2063         if (_gestureController)
2064             _gestureController->didRestoreScrollPosition();
2065
2066         _firstTransactionIDAfterPageRestore = WTF::nullopt;
2067     }
2068
2069     if (needUpdateVisibleContentRects)
2070         [self _scheduleVisibleContentRectUpdate];
2071
2072     if (WebKit::RemoteLayerTreeScrollingPerformanceData* scrollPerfData = _page->scrollingPerformanceData())
2073         scrollPerfData->didCommitLayerTree([self visibleRectInViewCoordinates]);
2074 }
2075
2076 - (void)_layerTreeCommitComplete
2077 {
2078     _commitDidRestoreScrollPosition = NO;
2079 }
2080
2081 - (void)_couldNotRestorePageState
2082 {
2083     // The gestureController may be waiting for the scroll position to be restored
2084     // in order to remove the swipe snapshot. Since the scroll position could not be
2085     // restored, tell the gestureController it was restored so that it no longer waits
2086     // for it.
2087     if (_gestureController)
2088         _gestureController->didRestoreScrollPosition();
2089 }
2090
2091 - (void)_restorePageScrollPosition:(Optional<WebCore::FloatPoint>)scrollPosition scrollOrigin:(WebCore::FloatPoint)scrollOrigin previousObscuredInset:(WebCore::FloatBoxExtent)obscuredInsets scale:(double)scale
2092 {
2093     if (_dynamicViewportUpdateMode != WebKit::DynamicViewportUpdateMode::NotResizing)
2094         return;
2095
2096     if (![self usesStandardContentView])
2097         return;
2098
2099     _firstTransactionIDAfterPageRestore = downcast<WebKit::RemoteLayerTreeDrawingAreaProxy>(*_page->drawingArea()).nextLayerTreeTransactionID();
2100     if (scrollPosition)
2101         _scrollOffsetToRestore = WebCore::ScrollableArea::scrollOffsetFromPosition(WebCore::FloatPoint(scrollPosition.value()), WebCore::toFloatSize(scrollOrigin));
2102     else
2103         _scrollOffsetToRestore = WTF::nullopt;
2104
2105     _obscuredInsetsWhenSaved = obscuredInsets;
2106     _scaleToRestore = scale;
2107 }
2108
2109 - (void)_restorePageStateToUnobscuredCenter:(Optional<WebCore::FloatPoint>)center scale:(double)scale
2110 {
2111     if (_dynamicViewportUpdateMode != WebKit::DynamicViewportUpdateMode::NotResizing)
2112         return;
2113
2114     if (![self usesStandardContentView])
2115         return;
2116
2117     _firstTransactionIDAfterPageRestore = downcast<WebKit::RemoteLayerTreeDrawingAreaProxy>(*_page->drawingArea()).nextLayerTreeTransactionID();
2118     _unobscuredCenterToRestore = center;
2119
2120     _scaleToRestore = scale;
2121 }
2122
2123 - (RefPtr<WebKit::ViewSnapshot>)_takeViewSnapshot
2124 {
2125 #if HAVE(CORE_ANIMATION_RENDER_SERVER)
2126     float deviceScale = WebCore::screenScaleFactor();
2127     WebCore::FloatSize snapshotSize(self.bounds.size);
2128     snapshotSize.scale(deviceScale);
2129
2130     CATransform3D transform = CATransform3DMakeScale(deviceScale, deviceScale, 1);
2131
2132 #if HAVE(IOSURFACE)
2133     WebCore::IOSurface::Format snapshotFormat = WebCore::screenSupportsExtendedColor() ? WebCore::IOSurface::Format::RGB10 : WebCore::IOSurface::Format::RGBA;
2134     auto surface = WebCore::IOSurface::create(WebCore::expandedIntSize(snapshotSize), WebCore::sRGBColorSpaceRef(), snapshotFormat);
2135     if (!surface)
2136         return nullptr;
2137     CARenderServerRenderLayerWithTransform(MACH_PORT_NULL, self.layer.context.contextId, reinterpret_cast<uint64_t>(self.layer), surface->surface(), 0, 0, &transform);
2138
2139 #if HAVE(IOSURFACE_ACCELERATOR)
2140     WebCore::IOSurface::Format compressedFormat = WebCore::IOSurface::Format::YUV422;
2141     if (WebCore::IOSurface::allowConversionFromFormatToFormat(snapshotFormat, compressedFormat)) {
2142         auto viewSnapshot = WebKit::ViewSnapshot::create(nullptr);
2143         WebCore::IOSurface::convertToFormat(WTFMove(surface), WebCore::IOSurface::Format::YUV422, [viewSnapshot = viewSnapshot.copyRef()](std::unique_ptr<WebCore::IOSurface> convertedSurface) {
2144             if (convertedSurface)
2145                 viewSnapshot->setSurface(WTFMove(convertedSurface));
2146         });
2147
2148         return viewSnapshot;
2149     }
2150 #endif // HAVE(IOSURFACE_ACCELERATOR)
2151
2152     return WebKit::ViewSnapshot::create(WTFMove(surface));
2153 #else // HAVE(IOSURFACE)
2154     uint32_t slotID = [WebKit::ViewSnapshotStore::snapshottingContext() createImageSlot:snapshotSize hasAlpha:YES];
2155
2156     if (!slotID)
2157         return nullptr;
2158
2159     CARenderServerCaptureLayerWithTransform(MACH_PORT_NULL, self.layer.context.contextId, (uint64_t)self.layer, slotID, 0, 0, &transform);
2160     WebCore::IntSize imageSize = WebCore::expandedIntSize(WebCore::FloatSize(snapshotSize));
2161     return WebKit::ViewSnapshot::create(slotID, imageSize, (imageSize.area() * 4).unsafeGet());
2162 #endif // HAVE(IOSURFACE)
2163 #else // HAVE(CORE_ANIMATION_RENDER_SERVER)
2164     return nullptr;
2165 #endif
2166 }
2167
2168 - (void)_zoomToPoint:(WebCore::FloatPoint)point atScale:(double)scale animated:(BOOL)animated
2169 {
2170     CFTimeInterval duration = 0;
2171     CGFloat zoomScale = contentZoomScale(self);
2172
2173     if (animated) {
2174         const double maximumZoomDuration = 0.4;
2175         const double minimumZoomDuration = 0.1;
2176         const double zoomDurationFactor = 0.3;
2177
2178         duration = std::min(fabs(log(zoomScale) - log(scale)) * zoomDurationFactor + minimumZoomDuration, maximumZoomDuration);
2179     }
2180
2181     if (scale != zoomScale)
2182         _page->willStartUserTriggeredZooming();
2183
2184     LOG_WITH_STREAM(VisibleRects, stream << "_zoomToPoint:" << point << " scale: " << scale << " duration:" << duration);
2185
2186     [_scrollView _zoomToCenter:point scale:scale duration:duration];
2187 }
2188
2189 - (void)_zoomToRect:(WebCore::FloatRect)targetRect atScale:(double)scale origin:(WebCore::FloatPoint)origin animated:(BOOL)animated
2190 {
2191     // FIXME: Some of this could be shared with _scrollToRect.
2192     const double visibleRectScaleChange = contentZoomScale(self) / scale;
2193     const WebCore::FloatRect visibleRect([self convertRect:self.bounds toView:self._currentContentView]);
2194     const WebCore::FloatRect unobscuredRect([self _contentRectForUserInteraction]);
2195
2196     const WebCore::FloatSize topLeftObscuredInsetAfterZoom((unobscuredRect.minXMinYCorner() - visibleRect.minXMinYCorner()) * visibleRectScaleChange);
2197     const WebCore::FloatSize bottomRightObscuredInsetAfterZoom((visibleRect.maxXMaxYCorner() - unobscuredRect.maxXMaxYCorner()) * visibleRectScaleChange);
2198
2199     const WebCore::FloatSize unobscuredRectSizeAfterZoom(unobscuredRect.size() * visibleRectScaleChange);
2200
2201     // Center to the target rect.
2202     WebCore::FloatPoint unobscuredRectLocationAfterZoom = targetRect.location() - (unobscuredRectSizeAfterZoom - targetRect.size()) * 0.5;
2203
2204     // Center to the tap point instead in case the target rect won't fit in a direction.
2205     if (targetRect.width() > unobscuredRectSizeAfterZoom.width())
2206         unobscuredRectLocationAfterZoom.setX(origin.x() - unobscuredRectSizeAfterZoom.width() / 2);
2207     if (targetRect.height() > unobscuredRectSizeAfterZoom.height())
2208         unobscuredRectLocationAfterZoom.setY(origin.y() - unobscuredRectSizeAfterZoom.height() / 2);
2209
2210     // We have computed where we want the unobscured rect to be. Now adjust for the obscuring insets.
2211     WebCore::FloatRect visibleRectAfterZoom(unobscuredRectLocationAfterZoom, unobscuredRectSizeAfterZoom);
2212     visibleRectAfterZoom.move(-topLeftObscuredInsetAfterZoom);
2213     visibleRectAfterZoom.expand(topLeftObscuredInsetAfterZoom + bottomRightObscuredInsetAfterZoom);
2214
2215     [self _zoomToPoint:visibleRectAfterZoom.center() atScale:scale animated:animated];
2216 }
2217
2218 static WebCore::FloatPoint constrainContentOffset(WebCore::FloatPoint contentOffset, WebCore::FloatSize contentSize, WebCore::FloatSize unobscuredContentSize)
2219 {
2220     WebCore::FloatSize maximumContentOffset = contentSize - unobscuredContentSize;
2221     return contentOffset.constrainedBetween(WebCore::FloatPoint(), WebCore::FloatPoint(maximumContentOffset));
2222 }
2223
2224 - (void)_scrollToContentScrollPosition:(WebCore::FloatPoint)scrollPosition scrollOrigin:(WebCore::IntPoint)scrollOrigin
2225 {
2226     if (_commitDidRestoreScrollPosition || _dynamicViewportUpdateMode != WebKit::DynamicViewportUpdateMode::NotResizing)
2227         return;
2228
2229     WebCore::FloatPoint contentOffset = WebCore::ScrollableArea::scrollOffsetFromPosition(scrollPosition, toFloatSize(scrollOrigin));
2230
2231     WebCore::FloatPoint scaledOffset = contentOffset;
2232     CGFloat zoomScale = contentZoomScale(self);
2233     scaledOffset.scale(zoomScale);
2234
2235     CGPoint contentOffsetInScrollViewCoordinates = [self _contentOffsetAdjustedForObscuredInset:scaledOffset];
2236     contentOffsetInScrollViewCoordinates = contentOffsetBoundedInValidRange(_scrollView.get(), contentOffsetInScrollViewCoordinates);
2237
2238     [_scrollView _stopScrollingAndZoomingAnimations];
2239
2240     if (!CGPointEqualToPoint(contentOffsetInScrollViewCoordinates, [_scrollView contentOffset]))
2241         [_scrollView setContentOffset:contentOffsetInScrollViewCoordinates];
2242     else {
2243         // If we haven't changed anything, there would not be any VisibleContentRect update sent to the content.
2244         // The WebProcess would keep the invalid contentOffset as its scroll position.
2245         // To synchronize the WebProcess with what is on screen, we send the VisibleContentRect again.
2246         _page->resendLastVisibleContentRects();
2247     }
2248 }
2249
2250 - (BOOL)_scrollToRect:(WebCore::FloatRect)targetRect origin:(WebCore::FloatPoint)origin minimumScrollDistance:(float)minimumScrollDistance
2251 {
2252     WebCore::FloatRect unobscuredContentRect([self _contentRectForUserInteraction]);
2253     WebCore::FloatPoint unobscuredContentOffset = unobscuredContentRect.location();
2254     WebCore::FloatSize contentSize([self._currentContentView bounds].size);
2255
2256     // Center the target rect in the scroll view.
2257     // If the target doesn't fit in the scroll view, center on the gesture location instead.
2258     WebCore::FloatPoint newUnobscuredContentOffset;
2259     if (targetRect.width() <= unobscuredContentRect.width())
2260         newUnobscuredContentOffset.setX(targetRect.x() - (unobscuredContentRect.width() - targetRect.width()) / 2);
2261     else
2262         newUnobscuredContentOffset.setX(origin.x() - unobscuredContentRect.width() / 2);
2263     if (targetRect.height() <= unobscuredContentRect.height())
2264         newUnobscuredContentOffset.setY(targetRect.y() - (unobscuredContentRect.height() - targetRect.height()) / 2);
2265     else
2266         newUnobscuredContentOffset.setY(origin.y() - unobscuredContentRect.height() / 2);
2267     newUnobscuredContentOffset = constrainContentOffset(newUnobscuredContentOffset, contentSize, unobscuredContentRect.size());
2268
2269     if (unobscuredContentOffset == newUnobscuredContentOffset) {
2270         if (targetRect.width() > unobscuredContentRect.width())
2271             newUnobscuredContentOffset.setX(origin.x() - unobscuredContentRect.width() / 2);
2272         if (targetRect.height() > unobscuredContentRect.height())
2273             newUnobscuredContentOffset.setY(origin.y() - unobscuredContentRect.height() / 2);
2274         newUnobscuredContentOffset = constrainContentOffset(newUnobscuredContentOffset, contentSize, unobscuredContentRect.size());
2275     }
2276
2277     WebCore::FloatSize scrollViewOffsetDelta = newUnobscuredContentOffset - unobscuredContentOffset;
2278     scrollViewOffsetDelta.scale(contentZoomScale(self));
2279
2280     float scrollDistance = scrollViewOffsetDelta.diagonalLength();
2281     if (scrollDistance < minimumScrollDistance)
2282         return false;
2283
2284     [_contentView willStartZoomOrScroll];
2285
2286     LOG_WITH_STREAM(VisibleRects, stream << "_scrollToRect: scrolling to " << [_scrollView contentOffset] + scrollViewOffsetDelta);
2287
2288     [_scrollView setContentOffset:([_scrollView contentOffset] + scrollViewOffsetDelta) animated:YES];
2289     return true;
2290 }
2291
2292 - (void)_zoomOutWithOrigin:(WebCore::FloatPoint)origin animated:(BOOL)animated
2293 {
2294     [self _zoomToPoint:origin atScale:[_scrollView minimumZoomScale] animated:animated];
2295 }
2296
2297 - (void)_zoomToInitialScaleWithOrigin:(WebCore::FloatPoint)origin animated:(BOOL)animated
2298 {
2299     ASSERT(_initialScaleFactor > 0);
2300     [self _zoomToPoint:origin atScale:_initialScaleFactor animated:animated];
2301 }
2302
2303 // focusedElementRect and selectionRect are both in document coordinates.
2304 - (void)_zoomToFocusRect:(const WebCore::FloatRect&)focusedElementRectInDocumentCoordinates selectionRect:(const WebCore::FloatRect&)selectionRectInDocumentCoordinates insideFixed:(BOOL)insideFixed
2305     fontSize:(float)fontSize minimumScale:(double)minimumScale maximumScale:(double)maximumScale allowScaling:(BOOL)allowScaling forceScroll:(BOOL)forceScroll
2306 {
2307     LOG_WITH_STREAM(VisibleRects, stream << "_zoomToFocusRect:" << focusedElementRectInDocumentCoordinates << " selectionRect:" << selectionRectInDocumentCoordinates);
2308     UNUSED_PARAM(insideFixed);
2309
2310     const double minimumHeightToShowContentAboveKeyboard = 106;
2311     const CFTimeInterval formControlZoomAnimationDuration = 0.25;
2312     const double caretOffsetFromWindowEdge = 8;
2313
2314     UIWindow *window = [_scrollView window];
2315
2316     // Find the portion of the view that is visible on the screen.
2317     UIViewController *topViewController = [[[_scrollView _viewControllerForAncestor] _rootAncestorViewController] _viewControllerForSupportedInterfaceOrientations];
2318     UIView *fullScreenView = topViewController.view;
2319     if (!fullScreenView)
2320         fullScreenView = window;
2321
2322     CGRect unobscuredScrollViewRectInWebViewCoordinates = UIEdgeInsetsInsetRect([self bounds], _obscuredInsets);
2323     CGRect visibleScrollViewBoundsInWebViewCoordinates = CGRectIntersection(unobscuredScrollViewRectInWebViewCoordinates, [fullScreenView convertRect:[fullScreenView bounds] toView:self]);
2324     CGRect formAssistantFrameInWebViewCoordinates = [window convertRect:_inputViewBounds toView:self];
2325     CGRect intersectionBetweenScrollViewAndFormAssistant = CGRectIntersection(visibleScrollViewBoundsInWebViewCoordinates, formAssistantFrameInWebViewCoordinates);
2326     CGSize visibleSize = visibleScrollViewBoundsInWebViewCoordinates.size;
2327
2328     CGFloat visibleOffsetFromTop = 0;
2329     if (!CGRectIsEmpty(intersectionBetweenScrollViewAndFormAssistant)) {
2330         CGFloat heightVisibleAboveFormAssistant = CGRectGetMinY(intersectionBetweenScrollViewAndFormAssistant) - CGRectGetMinY(visibleScrollViewBoundsInWebViewCoordinates);
2331         CGFloat heightVisibleBelowFormAssistant = CGRectGetMaxY(visibleScrollViewBoundsInWebViewCoordinates) - CGRectGetMaxY(intersectionBetweenScrollViewAndFormAssistant);
2332
2333         if (heightVisibleAboveFormAssistant >= minimumHeightToShowContentAboveKeyboard || heightVisibleBelowFormAssistant < heightVisibleAboveFormAssistant)
2334             visibleSize.height = heightVisibleAboveFormAssistant;
2335         else {
2336             visibleSize.height = heightVisibleBelowFormAssistant;
2337             visibleOffsetFromTop = CGRectGetMaxY(intersectionBetweenScrollViewAndFormAssistant) - CGRectGetMinY(visibleScrollViewBoundsInWebViewCoordinates);
2338         }
2339     }
2340
2341     // Zoom around the element's bounding frame. We use a "standard" size to determine the proper frame.
2342     double currentScale = contentZoomScale(self);
2343     double scale = currentScale;
2344     if (allowScaling) {
2345 #if PLATFORM(WATCHOS)
2346         const CGFloat minimumMarginForZoomingToEntireFocusRectInWebViewCoordinates = 10;
2347         const CGFloat maximumMarginForZoomingToEntireFocusRectInWebViewCoordinates = 35;
2348
2349         CGRect minimumTargetRectInDocumentCoordinates = UIRectInsetEdges(focusedElementRectInDocumentCoordinates, UIRectEdgeAll, -minimumMarginForZoomingToEntireFocusRectInWebViewCoordinates / currentScale);
2350         CGRect maximumTargetRectInDocumentCoordinates = UIRectInsetEdges(focusedElementRectInDocumentCoordinates, UIRectEdgeAll, -maximumMarginForZoomingToEntireFocusRectInWebViewCoordinates / currentScale);
2351
2352         double clampedMaximumTargetScale = clampTo<double>(std::min(visibleSize.width / CGRectGetWidth(minimumTargetRectInDocumentCoordinates), visibleSize.height / CGRectGetHeight(minimumTargetRectInDocumentCoordinates)), minimumScale, maximumScale);
2353         double clampedMinimumTargetScale = clampTo<double>(std::min(visibleSize.width / CGRectGetWidth(maximumTargetRectInDocumentCoordinates), visibleSize.height / CGRectGetHeight(maximumTargetRectInDocumentCoordinates)), minimumScale, maximumScale);
2354         scale = clampTo<double>(currentScale, clampedMinimumTargetScale, clampedMaximumTargetScale);
2355 #else
2356         const double webViewStandardFontSize = 16;
2357         scale = clampTo<double>(webViewStandardFontSize / fontSize, minimumScale, maximumScale);
2358 #endif
2359     }
2360
2361     CGFloat documentWidth = [_contentView bounds].size.width;
2362     scale = CGRound(documentWidth * scale) / documentWidth;
2363
2364     WebCore::FloatRect focusedElementRectInNewScale = focusedElementRectInDocumentCoordinates;
2365     focusedElementRectInNewScale.scale(scale);
2366     focusedElementRectInNewScale.moveBy([_contentView frame].origin);
2367
2368     BOOL selectionRectIsNotNull = !selectionRectInDocumentCoordinates.isZero();
2369     if (!forceScroll) {
2370         CGRect currentlyVisibleRegionInWebViewCoordinates;
2371         currentlyVisibleRegionInWebViewCoordinates.origin = unobscuredScrollViewRectInWebViewCoordinates.origin;
2372         currentlyVisibleRegionInWebViewCoordinates.origin.y += visibleOffsetFromTop;
2373         currentlyVisibleRegionInWebViewCoordinates.size = visibleSize;
2374
2375         // Don't bother scrolling if the entire node is already visible, whether or not we got a selectionRect.
2376         if (CGRectContainsRect(currentlyVisibleRegionInWebViewCoordinates, [self convertRect:focusedElementRectInDocumentCoordinates fromView:_contentView.get()]))
2377             return;
2378
2379         // Don't bother scrolling if we have a valid selectionRect and it is already visible.
2380         if (selectionRectIsNotNull && CGRectContainsRect(currentlyVisibleRegionInWebViewCoordinates, [self convertRect:selectionRectInDocumentCoordinates fromView:_contentView.get()]))
2381             return;
2382     }
2383
2384     // We want to center the focused element within the viewport, with as much spacing on all sides as
2385     // we can get based on the visible area after zooming. The spacing in either dimension is half the
2386     // difference between the size of the DOM node and the size of the visible frame.
2387     // If the element is too wide to be horizontally centered or too tall to be vertically centered, we
2388     // instead scroll such that the left edge or top edge of the element is within the left half or top
2389     // half of the viewport, respectively.
2390     CGFloat horizontalSpaceInWebViewCoordinates = (visibleSize.width - focusedElementRectInNewScale.width()) / 2.0;
2391     CGFloat verticalSpaceInWebViewCoordinates = (visibleSize.height - focusedElementRectInNewScale.height()) / 2.0;
2392
2393     auto topLeft = CGPointZero;
2394     auto scrollViewInsets = [_scrollView _effectiveContentInset];
2395     auto currentTopLeft = [_scrollView contentOffset];
2396
2397     if (_haveSetObscuredInsets) {
2398         currentTopLeft.x += _obscuredInsets.left;
2399         currentTopLeft.y += _obscuredInsets.top;
2400     }
2401
2402     if (horizontalSpaceInWebViewCoordinates > 0)
2403         topLeft.x = focusedElementRectInNewScale.x() - horizontalSpaceInWebViewCoordinates;
2404     else {
2405         auto minimumOffsetToRevealLeftEdge = std::max(-scrollViewInsets.left, focusedElementRectInNewScale.x() - visibleSize.width / 2);
2406         auto maximumOffsetToRevealLeftEdge = focusedElementRectInNewScale.x();
2407         topLeft.x = clampTo<double>(currentTopLeft.x, minimumOffsetToRevealLeftEdge, maximumOffsetToRevealLeftEdge);
2408     }
2409
2410     if (verticalSpaceInWebViewCoordinates > 0)
2411         topLeft.y = focusedElementRectInNewScale.y() - verticalSpaceInWebViewCoordinates;
2412     else {
2413         auto minimumOffsetToRevealTopEdge = std::max(-scrollViewInsets.top, focusedElementRectInNewScale.y() - visibleSize.height / 2);
2414         auto maximumOffsetToRevealTopEdge = focusedElementRectInNewScale.y();
2415         topLeft.y = clampTo<double>(currentTopLeft.y, minimumOffsetToRevealTopEdge, maximumOffsetToRevealTopEdge);
2416     }
2417
2418     topLeft.y -= visibleOffsetFromTop;
2419
2420     WebCore::FloatRect documentBoundsInNewScale = [_contentView bounds];
2421     documentBoundsInNewScale.scale(scale);
2422     documentBoundsInNewScale.moveBy([_contentView frame].origin);
2423
2424     CGFloat minimumAllowableHorizontalOffsetInWebViewCoordinates = -INFINITY;
2425     CGFloat minimumAllowableVerticalOffsetInWebViewCoordinates = -INFINITY;
2426     CGFloat maximumAllowableHorizontalOffsetInWebViewCoordinates = CGRectGetMaxX(documentBoundsInNewScale) - visibleSize.width;
2427     CGFloat maximumAllowableVerticalOffsetInWebViewCoordinates = CGRectGetMaxY(documentBoundsInNewScale) - visibleSize.height;
2428
2429     if (selectionRectIsNotNull) {
2430         WebCore::FloatRect selectionRectInNewScale = selectionRectInDocumentCoordinates;
2431         selectionRectInNewScale.scale(scale);
2432         selectionRectInNewScale.moveBy([_contentView frame].origin);
2433         // Adjust the min and max allowable scroll offsets, such that the selection rect remains visible.
2434         minimumAllowableHorizontalOffsetInWebViewCoordinates = CGRectGetMaxX(selectionRectInNewScale) + caretOffsetFromWindowEdge - visibleSize.width;
2435         minimumAllowableVerticalOffsetInWebViewCoordinates = CGRectGetMaxY(selectionRectInNewScale) + caretOffsetFromWindowEdge - visibleSize.height - visibleOffsetFromTop;
2436         maximumAllowableHorizontalOffsetInWebViewCoordinates = std::min<CGFloat>(maximumAllowableHorizontalOffsetInWebViewCoordinates, CGRectGetMinX(selectionRectInNewScale) - caretOffsetFromWindowEdge);
2437         maximumAllowableVerticalOffsetInWebViewCoordinates = std::min<CGFloat>(maximumAllowableVerticalOffsetInWebViewCoordinates, CGRectGetMinY(selectionRectInNewScale) - caretOffsetFromWindowEdge - visibleOffsetFromTop);
2438     }
2439
2440     // Constrain the left edge in document coordinates so that:
2441     //  - it isn't so small that the scrollVisibleRect isn't visible on the screen
2442     //  - it isn't so great that the document's right edge is less than the right edge of the screen
2443     topLeft.x = clampTo<CGFloat>(topLeft.x, minimumAllowableHorizontalOffsetInWebViewCoordinates, maximumAllowableHorizontalOffsetInWebViewCoordinates);
2444
2445     // Constrain the top edge in document coordinates so that:
2446     //  - it isn't so small that the scrollVisibleRect isn't visible on the screen
2447     //  - it isn't so great that the document's bottom edge is higher than the top of the form assistant
2448     topLeft.y = clampTo<CGFloat>(topLeft.y, minimumAllowableVerticalOffsetInWebViewCoordinates, maximumAllowableVerticalOffsetInWebViewCoordinates);
2449
2450     if (_haveSetObscuredInsets) {
2451         // This looks unintuitive, but is necessary in order to precisely center the focused element in the visible area.
2452         // The top left position already accounts for top and left obscured insets - i.e., a topLeft of (0, 0) corresponds
2453         // to the top- and left-most point below (and to the right of) the top inset area and left inset areas, respectively.
2454         // However, when telling WKScrollView to scroll to a given center position, this center position is computed relative
2455         // to the coordinate space of the scroll view. Thus, to compute our center position from the top left position, we
2456         // need to first move the top left position up and to the left, and then add half the width and height of the content
2457         // area (including obscured insets).
2458         topLeft.x -= _obscuredInsets.left;
2459         topLeft.y -= _obscuredInsets.top;
2460     }
2461
2462     WebCore::FloatPoint newCenter = CGPointMake(topLeft.x + CGRectGetWidth(self.bounds) / 2, topLeft.y + CGRectGetHeight(self.bounds) / 2);
2463
2464     if (scale != currentScale)
2465         _page->willStartUserTriggeredZooming();
2466
2467     LOG_WITH_STREAM(VisibleRects, stream << "_zoomToFocusRect: zooming to " << newCenter << " scale:" << scale);
2468
2469     // The newCenter has been computed in the new scale, but _zoomToCenter expected the center to be in the original scale.
2470     newCenter.scale(1 / scale);
2471     [_scrollView _zoomToCenter:newCenter scale:scale duration:formControlZoomAnimationDuration force:YES];
2472 }
2473
2474 - (double)_initialScaleFactor
2475 {
2476     return _initialScaleFactor;
2477 }
2478
2479 - (double)_contentZoomScale
2480 {
2481     return contentZoomScale(self);
2482 }
2483
2484 - (double)_targetContentZoomScaleForRect:(const WebCore::FloatRect&)targetRect currentScale:(double)currentScale fitEntireRect:(BOOL)fitEntireRect minimumScale:(double)minimumScale maximumScale:(double)maximumScale
2485 {
2486     WebCore::FloatSize unobscuredContentSize([self _contentRectForUserInteraction].size);
2487     double horizontalScale = unobscuredContentSize.width() * currentScale / targetRect.width();
2488     double verticalScale = unobscuredContentSize.height() * currentScale / targetRect.height();
2489
2490     horizontalScale = std::min(std::max(horizontalScale, minimumScale), maximumScale);
2491     verticalScale = std::min(std::max(verticalScale, minimumScale), maximumScale);
2492
2493     return fitEntireRect ? std::min(horizontalScale, verticalScale) : horizontalScale;
2494 }
2495
2496 - (BOOL)_zoomToRect:(WebCore::FloatRect)targetRect withOrigin:(WebCore::FloatPoint)origin fitEntireRect:(BOOL)fitEntireRect minimumScale:(double)minimumScale maximumScale:(double)maximumScale minimumScrollDistance:(float)minimumScrollDistance
2497 {
2498     const float maximumScaleFactorDeltaForPanScroll = 0.02;
2499
2500     double currentScale = contentZoomScale(self);
2501     double targetScale = [self _targetContentZoomScaleForRect:targetRect currentScale:currentScale fitEntireRect:fitEntireRect minimumScale:minimumScale maximumScale:maximumScale];
2502
2503     if (fabs(targetScale - currentScale) < maximumScaleFactorDeltaForPanScroll) {
2504         if ([self _scrollToRect:targetRect origin:origin minimumScrollDistance:minimumScrollDistance])
2505             return true;
2506     } else if (targetScale != currentScale) {
2507         [self _zoomToRect:targetRect atScale:targetScale origin:origin animated:YES];
2508         return true;
2509     }
2510
2511     return false;
2512 }
2513
2514 - (void)didMoveToWindow
2515 {
2516     _page->activityStateDidChange(WebCore::ActivityState::allFlags());
2517     _page->webViewDidMoveToWindow();
2518 }
2519
2520 - (void)setOpaque:(BOOL)opaque
2521 {
2522     BOOL oldOpaque = self.opaque;
2523
2524     [super setOpaque:opaque];
2525     [_contentView setOpaque:opaque];
2526
2527     if (oldOpaque == opaque)
2528         return;
2529
2530     if (!_page)
2531         return;
2532
2533     Optional<WebCore::Color> backgroundColor;
2534     if (!opaque)
2535         backgroundColor = WebCore::Color(WebCore::Color::transparent);
2536     _page->setBackgroundColor(backgroundColor);
2537     [self _updateScrollViewBackground];
2538 }
2539
2540 - (void)setBackgroundColor:(UIColor *)backgroundColor
2541 {
2542     [super setBackgroundColor:backgroundColor];
2543     [_contentView setBackgroundColor:backgroundColor];
2544 }
2545
2546 - (BOOL)_allowsDoubleTapGestures
2547 {
2548     if (_fastClickingIsDisabled)
2549         return YES;
2550
2551     // If the page is not user scalable, we don't allow double tap gestures.
2552     if (![_scrollView isZoomEnabled] || [_scrollView minimumZoomScale] >= [_scrollView maximumZoomScale])
2553         return NO;
2554
2555     // If the viewport width was not explicit, we allow double tap gestures.
2556     if (!_viewportMetaTagWidthWasExplicit || _viewportMetaTagCameFromImageDocument)
2557         return YES;
2558
2559     // If the page set a viewport width that wasn't the device width, then it was
2560     // scaled and thus will probably need to zoom.
2561     if (_viewportMetaTagWidth != WebCore::ViewportArguments::ValueDeviceWidth)
2562         return YES;
2563
2564     // At this point, we have a page that asked for width = device-width. However,
2565     // if the content's width and height were large, we might have had to shrink it.
2566     // We'll enable double tap zoom whenever we're not at the actual initial scale.
2567     return !areEssentiallyEqualAsFloat(contentZoomScale(self), _initialScaleFactor);
2568 }
2569
2570 - (BOOL)_stylusTapGestureShouldCreateEditableImage
2571 {
2572     return [_configuration _editableImagesEnabled];
2573 }
2574
2575 #pragma mark - UIScrollViewDelegate
2576
2577 - (BOOL)usesStandardContentView
2578 {
2579     return !_customContentView && !_passwordView;
2580 }
2581
2582 - (CGSize)scrollView:(UIScrollView*)scrollView contentSizeForZoomScale:(CGFloat)scale withProposedSize:(CGSize)proposedSize
2583 {
2584     return roundScrollViewContentSize(*_page, proposedSize);
2585 }
2586
2587 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
2588 {
2589     ASSERT(_scrollView == scrollView);
2590     return self._currentContentView;
2591 }
2592
2593 - (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view
2594 {
2595     if (![self usesStandardContentView]) {
2596         if ([_customContentView respondsToSelector:@selector(web_scrollViewWillBeginZooming:withView:)])
2597             [_customContentView web_scrollViewWillBeginZooming:scrollView withView:view];
2598         return;
2599     }
2600
2601     if (scrollView.pinchGestureRecognizer.state == UIGestureRecognizerStateBegan) {
2602         _page->willStartUserTriggeredZooming();
2603         [_contentView scrollViewWillStartPanOrPinchGesture];
2604     }
2605     [_contentView willStartZoomOrScroll];
2606
2607 #if ENABLE(POINTER_EVENTS)
2608     [_contentView cancelPointersForGestureRecognizer:scrollView.pinchGestureRecognizer];
2609 #endif
2610 }
2611
2612 - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
2613 {
2614     if (![self usesStandardContentView])
2615         return;
2616
2617     if (scrollView.panGestureRecognizer.state == UIGestureRecognizerStateBegan)
2618         [_contentView scrollViewWillStartPanOrPinchGesture];
2619
2620     [_contentView willStartZoomOrScroll];
2621 #if ENABLE(CSS_SCROLL_SNAP) && ENABLE(ASYNC_SCROLLING)
2622     // FIXME: We will want to detect whether snapping will occur before beginning to drag. See WebPageProxy::didCommitLayerTree.
2623     WebKit::RemoteScrollingCoordinatorProxy* coordinator = _page->scrollingCoordinatorProxy();
2624     ASSERT(scrollView == _scrollView.get());
2625     CGFloat scrollDecelerationFactor = (coordinator && coordinator->shouldSetScrollViewDecelerationRateFast()) ? UIScrollViewDecelerationRateFast : UIScrollViewDecelerationRateNormal;
2626     scrollView.horizontalScrollDecelerationFactor = scrollDecelerationFactor;
2627     scrollView.verticalScrollDecelerationFactor = scrollDecelerationFactor;
2628 #endif
2629 }
2630
2631 - (void)_didFinishScrolling
2632 {
2633     if (![self usesStandardContentView])
2634         return;
2635
2636     [self _scheduleVisibleContentRectUpdate];
2637     [_contentView didFinishScrolling];
2638 }
2639
2640 - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
2641 {
2642     // Work around <rdar://problem/16374753> by avoiding deceleration while
2643     // zooming. We'll animate to the right place once the zoom finishes.
2644     if ([scrollView isZooming])
2645         *targetContentOffset = [scrollView contentOffset];
2646 #if ENABLE(POINTER_EVENTS)
2647     else {
2648         if ([_contentView preventsPanningInXAxis])
2649             targetContentOffset->x = scrollView.contentOffset.x;
2650         if ([_contentView preventsPanningInYAxis])
2651             targetContentOffset->y = scrollView.contentOffset.y;
2652     }
2653 #endif
2654 #if ENABLE(CSS_SCROLL_SNAP) && ENABLE(ASYNC_SCROLLING)
2655     if (WebKit::RemoteScrollingCoordinatorProxy* coordinator = _page->scrollingCoordinatorProxy()) {
2656         // FIXME: Here, I'm finding the maximum horizontal/vertical scroll offsets. There's probably a better way to do this.
2657         CGSize maxScrollOffsets = CGSizeMake(scrollView.contentSize.width - scrollView.bounds.size.width, scrollView.contentSize.height - scrollView.bounds.size.height);
2658
2659         UIEdgeInsets obscuredInset;
2660
2661         id<WKUIDelegatePrivate> uiDelegatePrivate = static_cast<id <WKUIDelegatePrivate>>([self UIDelegate]);
2662         if ([uiDelegatePrivate respondsToSelector:@selector(_webView:finalObscuredInsetsForScrollView:withVelocity:targetContentOffset:)])
2663             obscuredInset = [uiDelegatePrivate _webView:self finalObscuredInsetsForScrollView:scrollView withVelocity:velocity targetContentOffset:targetContentOffset];
2664         else
2665             obscuredInset = [self _computedObscuredInset];
2666
2667         CGRect unobscuredRect = UIEdgeInsetsInsetRect(self.bounds, obscuredInset);
2668
2669         coordinator->adjustTargetContentOffsetForSnapping(maxScrollOffsets, velocity, unobscuredRect.origin.y, targetContentOffset);
2670     }
2671 #endif
2672 }
2673
2674 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
2675 {
2676     // If we're decelerating, scroll offset will be updated when scrollViewDidFinishDecelerating: is called.
2677     if (!decelerate)
2678         [self _didFinishScrolling];
2679 }
2680
2681 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
2682 {
2683     [self _didFinishScrolling];
2684 }
2685
2686 - (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView
2687 {
2688     [self _didFinishScrolling];
2689 }
2690
2691 #if ENABLE(POINTER_EVENTS)
2692 - (CGPoint)_scrollView:(UIScrollView *)scrollView adjustedOffsetForOffset:(CGPoint)offset translation:(CGPoint)translation startPoint:(CGPoint)start locationInView:(CGPoint)locationInView horizontalVelocity:(inout double *)hv verticalVelocity:(inout double *)vv
2693 {
2694     if (![_contentView preventsPanningInXAxis] && ![_contentView preventsPanningInYAxis]) {
2695         [_contentView cancelPointersForGestureRecognizer:scrollView.panGestureRecognizer];
2696         return offset;
2697     }
2698
2699     CGPoint adjustedContentOffset = CGPointMake(offset.x, offset.y);
2700     if ([_contentView preventsPanningInXAxis])
2701         adjustedContentOffset.x = start.x;
2702     if ([_contentView preventsPanningInYAxis])
2703         adjustedContentOffset.y = start.y;
2704
2705     if ((![_contentView preventsPanningInXAxis] && adjustedContentOffset.x != start.x)
2706         || (![_contentView preventsPanningInYAxis] && adjustedContentOffset.y != start.y)) {
2707         [_contentView cancelPointersForGestureRecognizer:scrollView.panGestureRecognizer];
2708     }
2709
2710     return adjustedContentOffset;
2711 }
2712 #endif
2713
2714 - (void)scrollViewDidScroll:(UIScrollView *)scrollView
2715 {
2716     if (![self usesStandardContentView] && [_customContentView respondsToSelector:@selector(web_scrollViewDidScroll:)])
2717         [_customContentView web_scrollViewDidScroll:(UIScrollView *)scrollView];
2718
2719     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2720
2721     if (WebKit::RemoteLayerTreeScrollingPerformanceData* scrollPerfData = _page->scrollingPerformanceData())
2722         scrollPerfData->didScroll([self visibleRectInViewCoordinates]);
2723 }
2724
2725 - (void)scrollViewDidZoom:(UIScrollView *)scrollView
2726 {
2727     if (![self usesStandardContentView] && [_customContentView respondsToSelector:@selector(web_scrollViewDidZoom:)])
2728         [_customContentView web_scrollViewDidZoom:scrollView];
2729
2730     [self _updateScrollViewBackground];
2731     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2732 }
2733
2734 - (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale
2735 {
2736     if (![self usesStandardContentView] && [_customContentView respondsToSelector:@selector(web_scrollViewDidEndZooming:withView:atScale:)])
2737         [_customContentView web_scrollViewDidEndZooming:scrollView withView:view atScale:scale];
2738
2739     ASSERT(scrollView == _scrollView);
2740     // FIXME: remove when rdar://problem/36065495 is fixed.
2741     // When rotating with two fingers down, UIScrollView can set a bogus content view position.
2742     // "Center" is top left because we set the anchorPoint to 0,0.
2743     [_contentView setCenter:self.bounds.origin];
2744
2745     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2746     [_contentView didZoomToScale:scale];
2747 }
2748
2749 - (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
2750 {
2751     [self _didFinishScrolling];
2752 }
2753
2754 - (void)_scrollViewDidInterruptDecelerating:(UIScrollView *)scrollView
2755 {
2756     if (![self usesStandardContentView])
2757         return;
2758
2759     [_contentView didInterruptScrolling];
2760     [self _scheduleVisibleContentRectUpdateAfterScrollInView:scrollView];
2761 }
2762
2763 - (UIView *)_enclosingViewForExposedRectComputation
2764 {
2765     return [self _scroller];
2766 }
2767
2768 - (CGRect)_visibleRectInEnclosingView:(UIView *)enclosingView
2769 {
2770     if (!enclosingView)
2771         return self.bounds;
2772
2773     CGRect exposedRect = [enclosingView convertRect:enclosingView.bounds toView:self];
2774     return CGRectIntersectsRect(exposedRect, self.bounds) ? CGRectIntersection(exposedRect, self.bounds) : CGRectZero;
2775 }
2776
2777 - (CGRect)_visibleContentRect
2778 {
2779     if (_frozenVisibleContentRect)
2780         return _frozenVisibleContentRect.value();
2781
2782     CGRect visibleRectInContentCoordinates = [self convertRect:self.bounds toView:_contentView.get()];
2783
2784     if (UIView *enclosingView = [self _enclosingViewForExposedRectComputation]) {
2785         CGRect viewVisibleRect = [self _visibleRectInEnclosingView:enclosingView];
2786         CGRect viewVisibleContentRect = [self convertRect:viewVisibleRect toView:_contentView.get()];
2787         visibleRectInContentCoordinates = CGRectIntersection(visibleRectInContentCoordinates, viewVisibleContentRect);
2788     }
2789
2790     return visibleRectInContentCoordinates;
2791 }
2792
2793 // Called when some ancestor UIScrollView scrolls.
2794 - (void)_didScroll
2795 {
2796     [self _scheduleVisibleContentRectUpdateAfterScrollInView:[self _scroller]];
2797
2798     const NSTimeInterval ScrollingEndedTimerInterval = 0.032;
2799     if (!_enclosingScrollViewScrollTimer) {
2800         _enclosingScrollViewScrollTimer = adoptNS([[NSTimer alloc] initWithFireDate:[NSDate dateWithTimeIntervalSinceNow:ScrollingEndedTimerInterval]
2801             interval:0 target:self selector:@selector(_enclosingScrollerScrollingEnded:) userInfo:nil repeats:YES]);
2802         [[NSRunLoop mainRunLoop] addTimer:_enclosingScrollViewScrollTimer.get() forMode:NSDefaultRunLoopMode];
2803     }
2804     _didScrollSinceLastTimerFire = YES;
2805 }
2806
2807 - (void)_enclosingScrollerScrollingEnded:(NSTimer *)timer
2808 {
2809     if (_didScrollSinceLastTimerFire) {
2810         _didScrollSinceLastTimerFire = NO;
2811         return;
2812     }
2813
2814     [self _scheduleVisibleContentRectUpdate];
2815     [_enclosingScrollViewScrollTimer invalidate];
2816     _enclosingScrollViewScrollTimer = nil;
2817 }
2818
2819 - (UIEdgeInsets)_scrollViewSystemContentInset
2820 {
2821     // It's not safe to access the scroll view's safeAreaInsets or _systemContentInset from
2822     // inside our layoutSubviews implementation, because they aren't updated until afterwards.
2823     // Instead, depend on the fact that the UIScrollView and WKWebView are in the same coordinate
2824     // space, and map the WKWebView's own insets into the scroll view manually.
2825     return UIEdgeInsetsAdd([_scrollView _contentScrollInset], self.safeAreaInsets, [_scrollView _edgesApplyingSafeAreaInsetsToContentInset]);
2826 }
2827
2828 - (WebCore::FloatSize)activeViewLayoutSize:(const CGRect&)bounds
2829 {
2830     if (_overridesViewLayoutSize)
2831         return WebCore::FloatSize(_viewLayoutSizeOverride);
2832
2833 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
2834     return WebCore::FloatSize(UIEdgeInsetsInsetRect(CGRectMake(0, 0, bounds.size.width, bounds.size.height), self._scrollViewSystemContentInset).size);
2835 #else
2836     return WebCore::FloatSize { bounds.size };
2837 #endif
2838 }
2839
2840 - (void)_dispatchSetViewLayoutSize:(WebCore::FloatSize)viewLayoutSize
2841 {
2842     if (_lastSentViewLayoutSize && CGSizeEqualToSize(_lastSentViewLayoutSize.value(), viewLayoutSize))
2843         return;
2844
2845     LOG_WITH_STREAM(VisibleRects, stream << "-[WKWebView " << _page->pageID() << " _dispatchSetViewLayoutSize:] " << viewLayoutSize << " contentZoomScale " << contentZoomScale(self));
2846     _page->setViewportConfigurationViewLayoutSize(viewLayoutSize, _page->layoutSizeScaleFactor(), _page->minimumEffectiveDeviceWidth());
2847     _lastSentViewLayoutSize = viewLayoutSize;
2848 }
2849
2850 - (void)_dispatchSetMaximumUnobscuredSize:(WebCore::FloatSize)maximumUnobscuredSize
2851 {
2852     if (_lastSentMaximumUnobscuredSize && CGSizeEqualToSize(_lastSentMaximumUnobscuredSize.value(), maximumUnobscuredSize))
2853         return;
2854
2855     _page->setMaximumUnobscuredSize(maximumUnobscuredSize);
2856     _lastSentMaximumUnobscuredSize = maximumUnobscuredSize;
2857 }
2858
2859 - (void)_dispatchSetDeviceOrientation:(int32_t)deviceOrientation
2860 {
2861     if (_lastSentDeviceOrientation && _lastSentDeviceOrientation.value() == deviceOrientation)
2862         return;
2863
2864     _page->setDeviceOrientation(deviceOrientation);
2865     _lastSentDeviceOrientation = deviceOrientation;
2866 }
2867
2868 - (void)_frameOrBoundsChanged
2869 {
2870     CGRect bounds = self.bounds;
2871     [_scrollView setFrame:bounds];
2872
2873     if (_dynamicViewportUpdateMode == WebKit::DynamicViewportUpdateMode::NotResizing) {
2874         if (!_overridesViewLayoutSize)
2875             [self _dispatchSetViewLayoutSize:[self activeViewLayoutSize:self.bounds]];
2876         if (!_overridesMaximumUnobscuredSize)
2877             [self _dispatchSetMaximumUnobscuredSize:WebCore::FloatSize(bounds.size)];
2878
2879         BOOL sizeChanged = NO;
2880         if (auto drawingArea = _page->drawingArea())
2881             sizeChanged = drawingArea->setSize(WebCore::IntSize(bounds.size));
2882
2883         if (sizeChanged & [self usesStandardContentView])
2884             [_contentView setSizeChangedSinceLastVisibleContentRectUpdate:YES];
2885     }
2886
2887     [_customContentView web_setMinimumSize:bounds.size];
2888     [self _scheduleVisibleContentRectUpdate];
2889 }
2890
2891 // 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.
2892 - (CGRect)_contentRectForUserInteraction
2893 {
2894     // FIXME: handle split keyboard.
2895     UIEdgeInsets obscuredInsets = _obscuredInsets;
2896     obscuredInsets.bottom = std::max(_obscuredInsets.bottom, _inputViewBounds.size.height);
2897     CGRect unobscuredRect = UIEdgeInsetsInsetRect(self.bounds, obscuredInsets);
2898     return [self convertRect:unobscuredRect toView:self._currentContentView];
2899 }
2900
2901 // Ideally UIScrollView would expose this for us: <rdar://problem/21394567>.
2902 - (BOOL)_scrollViewIsRubberBanding
2903 {
2904     float deviceScaleFactor = _page->deviceScaleFactor();
2905
2906     CGPoint contentOffset = [_scrollView contentOffset];
2907     CGPoint boundedOffset = contentOffsetBoundedInValidRange(_scrollView.get(), contentOffset);
2908     return !pointsEqualInDevicePixels(contentOffset, boundedOffset, deviceScaleFactor);
2909 }
2910
2911 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
2912 - (void)safeAreaInsetsDidChange
2913 {
2914     [super safeAreaInsetsDidChange];
2915
2916     [self _scheduleVisibleContentRectUpdate];
2917 }
2918 #endif
2919
2920 - (void)_scheduleVisibleContentRectUpdate
2921 {
2922     // For visible rect updates not associated with a specific UIScrollView, just consider our own scroller.
2923     [self _scheduleVisibleContentRectUpdateAfterScrollInView:_scrollView.get()];
2924 }
2925
2926 - (BOOL)_scrollViewIsInStableState:(UIScrollView *)scrollView
2927 {
2928     BOOL isStableState = !([scrollView isDragging] || [scrollView isDecelerating] || [scrollView isZooming] || [scrollView _isAnimatingZoom] || [scrollView _isScrollingToTop]);
2929
2930     if (isStableState && scrollView == _scrollView.get())
2931         isStableState = !_isChangingObscuredInsetsInteractively;
2932
2933     if (isStableState && scrollView == _scrollView.get())
2934         isStableState = ![self _scrollViewIsRubberBanding];
2935
2936     if (isStableState)
2937         isStableState = !scrollView._isInterruptingDeceleration;
2938
2939     if (NSNumber *stableOverride = self._stableStateOverride)
2940         isStableState = stableOverride.boolValue;
2941
2942     return isStableState;
2943 }
2944
2945 - (void)_addUpdateVisibleContentRectPreCommitHandler
2946 {
2947     auto retainedSelf = retainPtr(self);
2948     [CATransaction addCommitHandler:[retainedSelf] {
2949         WKWebView *webView = retainedSelf.get();
2950         if (![webView _isValid]) {
2951             RELEASE_LOG_IF(webView._page && webView._page->isAlwaysOnLoggingAllowed(), ViewState, "In CATransaction preCommitHandler, WKWebView %p is invalid", webView);
2952             return;
2953         }
2954
2955         @try {
2956             [webView _updateVisibleContentRects];
2957         } @catch (NSException *exception) {
2958             RELEASE_LOG_IF(webView._page && webView._page->isAlwaysOnLoggingAllowed(), ViewState, "In CATransaction preCommitHandler, -[WKWebView %p _updateVisibleContentRects] threw an exception", webView);
2959         }
2960         webView->_hasScheduledVisibleRectUpdate = NO;
2961     } forPhase:kCATransactionPhasePreCommit];
2962 }
2963
2964 - (void)_scheduleVisibleContentRectUpdateAfterScrollInView:(UIScrollView *)scrollView
2965 {
2966     _visibleContentRectUpdateScheduledFromScrollViewInStableState = [self _scrollViewIsInStableState:scrollView];
2967
2968     if (_hasScheduledVisibleRectUpdate) {
2969         auto timeNow = MonotonicTime::now();
2970         if ((timeNow - _timeOfRequestForVisibleContentRectUpdate) > delayBeforeNoVisibleContentsRectsLogging) {
2971             RELEASE_LOG_IF_ALLOWED("-[WKWebView %p _scheduleVisibleContentRectUpdateAfterScrollInView]: _hasScheduledVisibleRectUpdate is true but haven't updated visible content rects for %.2fs (last update was %.2fs ago) - valid %d",
2972                 self, (timeNow - _timeOfRequestForVisibleContentRectUpdate).value(), (timeNow - _timeOfLastVisibleContentRectUpdate).value(), [self _isValid]);
2973         }
2974         return;
2975     }
2976
2977     _hasScheduledVisibleRectUpdate = YES;
2978     _timeOfRequestForVisibleContentRectUpdate = MonotonicTime::now();
2979
2980     CATransactionPhase transactionPhase = [CATransaction currentPhase];
2981     if (transactionPhase == kCATransactionPhaseNull || transactionPhase == kCATransactionPhasePreLayout) {
2982         [self _addUpdateVisibleContentRectPreCommitHandler];
2983         return;
2984     }
2985
2986     dispatch_async(dispatch_get_main_queue(), [retainedSelf = retainPtr(self)] {
2987         WKWebView *webView = retainedSelf.get();
2988         if (![webView _isValid])
2989             return;
2990         [webView _addUpdateVisibleContentRectPreCommitHandler];
2991     });
2992 }
2993
2994 static bool scrollViewCanScroll(UIScrollView *scrollView)
2995 {
2996     if (!scrollView)
2997         return NO;
2998
2999     UIEdgeInsets contentInset = scrollView.contentInset;
3000     CGSize contentSize = scrollView.contentSize;
3001     CGSize boundsSize = scrollView.bounds.size;
3002
3003     return (contentSize.width + contentInset.left + contentInset.right) > boundsSize.width
3004         || (contentSize.height + contentInset.top + contentInset.bottom) > boundsSize.height;
3005 }
3006
3007 - (CGRect)_contentBoundsExtendedForRubberbandingWithScale:(CGFloat)scaleFactor
3008 {
3009     CGPoint contentOffset = [_scrollView contentOffset];
3010     CGPoint boundedOffset = contentOffsetBoundedInValidRange(_scrollView.get(), contentOffset);
3011
3012     CGFloat horiontalRubberbandAmountInContentCoordinates = (contentOffset.x - boundedOffset.x) / scaleFactor;
3013     CGFloat verticalRubberbandAmountInContentCoordinates = (contentOffset.y - boundedOffset.y) / scaleFactor;
3014
3015     CGRect extendedBounds = [_contentView bounds];
3016
3017     if (horiontalRubberbandAmountInContentCoordinates < 0) {
3018         extendedBounds.origin.x += horiontalRubberbandAmountInContentCoordinates;
3019         extendedBounds.size.width -= horiontalRubberbandAmountInContentCoordinates;
3020     } else if (horiontalRubberbandAmountInContentCoordinates > 0)
3021         extendedBounds.size.width += horiontalRubberbandAmountInContentCoordinates;
3022
3023     if (verticalRubberbandAmountInContentCoordinates < 0) {
3024         extendedBounds.origin.y += verticalRubberbandAmountInContentCoordinates;
3025         extendedBounds.size.height -= verticalRubberbandAmountInContentCoordinates;
3026     } else if (verticalRubberbandAmountInContentCoordinates > 0)
3027         extendedBounds.size.height += verticalRubberbandAmountInContentCoordinates;
3028
3029     return extendedBounds;
3030 }
3031
3032 - (void)_updateVisibleContentRects
3033 {
3034     BOOL inStableState = _visibleContentRectUpdateScheduledFromScrollViewInStableState;
3035
3036     if (![self usesStandardContentView]) {
3037         [_passwordView setFrame:self.bounds];
3038         [_customContentView web_computedContentInsetDidChange];
3039         RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _updateVisibleContentRects:] - usesStandardContentView is NO, bailing", self);
3040         return;
3041     }
3042
3043     if (_delayUpdateVisibleContentRects) {
3044         _hadDelayedUpdateVisibleContentRects = YES;
3045         RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _updateVisibleContentRects:] - _delayUpdateVisibleContentRects is YES, bailing", self);
3046         return;
3047     }
3048
3049     if (_dynamicViewportUpdateMode != WebKit::DynamicViewportUpdateMode::NotResizing
3050         || (_needsResetViewStateAfterCommitLoadForMainFrame && ![_contentView sizeChangedSinceLastVisibleContentRectUpdate])
3051         || [_scrollView isZoomBouncing]
3052         || _currentlyAdjustingScrollViewInsetsForKeyboard) {
3053         RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _updateVisibleContentRects:] - scroll view state is non-stable, bailing (_dynamicViewportUpdateMode %d, _needsResetViewStateAfterCommitLoadForMainFrame %d, sizeChangedSinceLastVisibleContentRectUpdate %d, [_scrollView isZoomBouncing] %d, _currentlyAdjustingScrollViewInsetsForKeyboard %d)",
3054             self, _dynamicViewportUpdateMode, _needsResetViewStateAfterCommitLoadForMainFrame, [_contentView sizeChangedSinceLastVisibleContentRectUpdate], [_scrollView isZoomBouncing], _currentlyAdjustingScrollViewInsetsForKeyboard);
3055         return;
3056     }
3057
3058     CGRect visibleRectInContentCoordinates = [self _visibleContentRect];
3059
3060     UIEdgeInsets computedContentInsetUnadjustedForKeyboard = [self _computedObscuredInset];
3061     if (!_haveSetObscuredInsets)
3062         computedContentInsetUnadjustedForKeyboard.bottom -= _totalScrollViewBottomInsetAdjustmentForKeyboard;
3063
3064     CGFloat scaleFactor = contentZoomScale(self);
3065
3066     CGRect unobscuredRect = UIEdgeInsetsInsetRect(self.bounds, computedContentInsetUnadjustedForKeyboard);
3067     CGRect unobscuredRectInContentCoordinates = _frozenUnobscuredContentRect ? _frozenUnobscuredContentRect.value() : [self convertRect:unobscuredRect toView:_contentView.get()];
3068     unobscuredRectInContentCoordinates = CGRectIntersection(unobscuredRectInContentCoordinates, [self _contentBoundsExtendedForRubberbandingWithScale:scaleFactor]);
3069
3070     // The following logic computes the extent to which the bottom, top, left and right content insets are visible.
3071     auto scrollViewInsets = [_scrollView contentInset];
3072     auto scrollViewBounds = [_scrollView bounds];
3073     auto scrollViewContentSize = [_scrollView contentSize];
3074     auto scrollViewOriginIncludingInset = UIEdgeInsetsInsetRect(scrollViewBounds, computedContentInsetUnadjustedForKeyboard).origin;
3075     auto maximumVerticalScrollExtentWithoutRevealingBottomContentInset = scrollViewContentSize.height - CGRectGetHeight(scrollViewBounds);
3076     auto maximumHorizontalScrollExtentWithoutRevealingRightContentInset = scrollViewContentSize.width - CGRectGetWidth(scrollViewBounds);
3077     auto contentInsets = UIEdgeInsetsZero;
3078     if (scrollViewInsets.left > 0 && scrollViewOriginIncludingInset.x < 0)
3079         contentInsets.left = std::min(-scrollViewOriginIncludingInset.x, scrollViewInsets.left) / scaleFactor;
3080
3081     if (scrollViewInsets.top > 0 && scrollViewOriginIncludingInset.y < 0)
3082         contentInsets.top = std::min(-scrollViewOriginIncludingInset.y, scrollViewInsets.top) / scaleFactor;
3083
3084     if (scrollViewInsets.right > 0 && scrollViewOriginIncludingInset.x > maximumHorizontalScrollExtentWithoutRevealingRightContentInset)
3085         contentInsets.right = std::min(scrollViewOriginIncludingInset.x - maximumHorizontalScrollExtentWithoutRevealingRightContentInset, scrollViewInsets.right) / scaleFactor;
3086
3087     if (scrollViewInsets.bottom > 0 && scrollViewOriginIncludingInset.y > maximumVerticalScrollExtentWithoutRevealingBottomContentInset)
3088         contentInsets.bottom = std::min(scrollViewOriginIncludingInset.y - maximumVerticalScrollExtentWithoutRevealingBottomContentInset, scrollViewInsets.bottom) / scaleFactor;
3089
3090 #if ENABLE(CSS_SCROLL_SNAP) && ENABLE(ASYNC_SCROLLING)
3091     if (inStableState) {
3092         WebKit::RemoteScrollingCoordinatorProxy* coordinator = _page->scrollingCoordinatorProxy();
3093         if (coordinator && coordinator->hasActiveSnapPoint()) {
3094             CGPoint currentPoint = [_scrollView contentOffset];
3095             CGPoint activePoint = coordinator->nearestActiveContentInsetAdjustedSnapPoint(unobscuredRect.origin.y, currentPoint);
3096
3097             if (!CGPointEqualToPoint(activePoint, currentPoint)) {
3098                 RetainPtr<WKScrollView> strongScrollView = _scrollView;
3099                 dispatch_async(dispatch_get_main_queue(), [strongScrollView, activePoint] {
3100                     [strongScrollView setContentOffset:activePoint animated:NO];
3101                 });
3102             }
3103         }
3104     }
3105 #endif
3106
3107     [_contentView didUpdateVisibleRect:visibleRectInContentCoordinates
3108         unobscuredRect:unobscuredRectInContentCoordinates
3109         contentInsets:contentInsets
3110         unobscuredRectInScrollViewCoordinates:unobscuredRect
3111         obscuredInsets:_obscuredInsets
3112         unobscuredSafeAreaInsets:[self _computedUnobscuredSafeAreaInset]
3113         inputViewBounds:_inputViewBounds
3114         scale:scaleFactor minimumScale:[_scrollView minimumZoomScale]
3115         inStableState:inStableState
3116         isChangingObscuredInsetsInteractively:_isChangingObscuredInsetsInteractively
3117         enclosedInScrollableAncestorView:scrollViewCanScroll([self _scroller])];
3118
3119     while (!_visibleContentRectUpdateCallbacks.isEmpty()) {
3120         auto callback = _visibleContentRectUpdateCallbacks.takeLast();
3121         callback();
3122     }
3123     
3124     auto timeNow = MonotonicTime::now();
3125     if ((timeNow - _timeOfRequestForVisibleContentRectUpdate) > delayBeforeNoVisibleContentsRectsLogging)
3126         RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _updateVisibleContentRects:] finally ran %.2fs after being scheduled", self, (timeNow - _timeOfRequestForVisibleContentRectUpdate).value());
3127
3128     _timeOfLastVisibleContentRectUpdate = timeNow;
3129 }
3130
3131 - (void)_didStartProvisionalLoadForMainFrame
3132 {
3133     if (_gestureController)
3134         _gestureController->didStartProvisionalLoadForMainFrame();
3135 }
3136
3137 static WebCore::FloatSize activeMaximumUnobscuredSize(WKWebView *webView, const CGRect& bounds)
3138 {
3139     return WebCore::FloatSize(webView->_overridesMaximumUnobscuredSize ? webView->_maximumUnobscuredSizeOverride : bounds.size);
3140 }
3141
3142 static int32_t activeOrientation(WKWebView *webView)
3143 {
3144     return webView->_overridesInterfaceOrientation ? deviceOrientationForUIInterfaceOrientation(webView->_interfaceOrientationOverride) : webView->_page->deviceOrientation();
3145 }
3146
3147 - (void)_cancelAnimatedResize
3148 {
3149     LOG_WITH_STREAM(VisibleRects, stream << "-[WKWebView " << _page->pageID() << " _cancelAnimatedResize:] " << " _dynamicViewportUpdateMode " << (int)_dynamicViewportUpdateMode);
3150     if (_dynamicViewportUpdateMode == WebKit::DynamicViewportUpdateMode::NotResizing)
3151         return;
3152
3153     if (!_customContentView) {
3154         if (_resizeAnimationView) {
3155             NSUInteger indexOfResizeAnimationView = [[_scrollView subviews] indexOfObject:_resizeAnimationView.get()];
3156             [_scrollView insertSubview:_contentView.get() atIndex:indexOfResizeAnimationView];
3157             [_scrollView insertSubview:[_contentView unscaledView] atIndex:indexOfResizeAnimationView + 1];
3158             [_resizeAnimationView removeFromSuperview];
3159             _resizeAnimationView = nil;
3160         }
3161
3162         [_contentView setHidden:NO];
3163         _resizeAnimationTransformAdjustments = CATransform3DIdentity;
3164     }
3165
3166     _dynamicViewportUpdateMode = WebKit::DynamicViewportUpdateMode::NotResizing;
3167     [self _scheduleVisibleContentRectUpdate];
3168 }
3169
3170 - (void)_didCompleteAnimatedResize
3171 {
3172     if (_dynamicViewportUpdateMode == WebKit::DynamicViewportUpdateMode::NotResizing)
3173         return;
3174
3175     [_contentView setHidden:NO];
3176
3177     if (!_resizeAnimationView) {
3178         // Paranoia. If _resizeAnimationView is null we'll end up setting a zero scale on the content view.
3179         RELEASE_LOG_IF_ALLOWED("%p -[WKWebView _didCompleteAnimatedResize:] - _resizeAnimationView is nil", self);
3180         [self _cancelAnimatedResize];
3181         return;
3182     }
3183
3184     NSUInteger indexOfResizeAnimationView = [[_scrollView subviews] indexOfObject:_resizeAnimationView.get()];
3185     [_scrollView insertSubview:_contentView.get() atIndex:indexOfResizeAnimationView];
3186     [_scrollView insertSubview:[_contentView unscaledView] atIndex:indexOfResizeAnimationView + 1];
3187
3188     CALayer *contentLayer = [_contentView layer];
3189     CGFloat adjustmentScale = _resizeAnimationTransformAdjustments.m11;
3190     contentLayer.sublayerTransform = CATransform3DIdentity;
3191
3192     CGFloat animatingScaleTarget = [[_resizeAnimationView layer] transform].m11;
3193     CATransform3D contentLayerTransform = contentLayer.transform;
3194     CGFloat currentScale = [[_resizeAnimationView layer] transform].m11 * contentLayerTransform.m11;
3195
3196     // We cannot use [UIScrollView setZoomScale:] directly because the UIScrollView delegate would get a callback with
3197     // an invalid contentOffset. The real content offset is only set below.
3198     // Since there is no public API for setting both the zoomScale and the contentOffset, we set the zoomScale manually
3199     // on the zoom layer and then only change the contentOffset.
3200     CGFloat adjustedScale = adjustmentScale * currentScale;
3201     contentLayerTransform.m11 = adjustedScale;
3202     contentLayerTransform.m22 = adjustedScale;
3203     contentLayer.transform = contentLayerTransform;
3204
3205     CGPoint currentScrollOffset = [_scrollView contentOffset];
3206     double horizontalScrollAdjustement = _resizeAnimationTransformAdjustments.m41 * animatingScaleTarget;
3207     double verticalScrollAdjustment = _resizeAnimationTransformAdjustments.m42 * animatingScaleTarget;
3208
3209     [_scrollView setContentSize:roundScrollViewContentSize(*_page, [_contentView frame].size)];
3210     [_scrollView setContentOffset:CGPointMake(currentScrollOffset.x - horizontalScrollAdjustement, currentScrollOffset.y - verticalScrollAdjustment)];
3211
3212     [_resizeAnimationView removeFromSuperview];
3213     _resizeAnimationView = nil;
3214     _resizeAnimationTransformAdjustments = CATransform3DIdentity;
3215
3216     _dynamicViewportUpdateMode = WebKit::DynamicViewportUpdateMode::NotResizing;
3217     [self _scheduleVisibleContentRectUpdate];
3218
3219     CGRect newBounds = self.bounds;
3220     auto newViewLayoutSize = [self activeViewLayoutSize:newBounds];
3221     auto newMaximumUnobscuredSize = activeMaximumUnobscuredSize(self, newBounds);
3222     int32_t newOrientation = activeOrientation(self);
3223
3224     if (!_lastSentViewLayoutSize || newViewLayoutSize != _lastSentViewLayoutSize.value())
3225         [self _dispatchSetViewLayoutSize:newViewLayoutSize];
3226
3227     if (!_lastSentMaximumUnobscuredSize || newMaximumUnobscuredSize != _lastSentMaximumUnobscuredSize.value())
3228         [self _dispatchSetMaximumUnobscuredSize:WebCore::FloatSize(newMaximumUnobscuredSize)];
3229
3230     if (!_lastSentDeviceOrientation || newOrientation != _lastSentDeviceOrientation.value())
3231         [self _dispatchSetDeviceOrientation:newOrientation];
3232
3233     while (!_callbacksDeferredDuringResize.isEmpty())
3234         _callbacksDeferredDuringResize.takeLast()();
3235 }
3236
3237 - (void)_didFinishLoadForMainFrame
3238 {
3239     if (_gestureController)
3240         _gestureController->didFinishLoadForMainFrame();
3241 }
3242
3243 - (void)_didFailLoadForMainFrame
3244 {
3245     if (_gestureController)
3246         _gestureController->didFailLoadForMainFrame();
3247 }
3248
3249 - (void)_didSameDocumentNavigationForMainFrame:(WebKit::SameDocumentNavigationType)navigationType
3250 {
3251     [_customContentView web_didSameDocumentNavigation:toAPI(navigationType)];
3252
3253     if (_gestureController)
3254         _gestureController->didSameDocumentNavigationForMainFrame(navigationType);
3255 }
3256
3257 - (void)_keyboardChangedWithInfo:(NSDictionary *)keyboardInfo adjustScrollView:(BOOL)adjustScrollView
3258 {
3259     NSValue *endFrameValue = [keyboardInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
3260     if (!endFrameValue)
3261         return;
3262
3263     // The keyboard rect is always in screen coordinates. In the view services case the window does not
3264     // have the interface orientation rotation transformation; its host does. So, it makes no sense to
3265     // clip the keyboard rect against its screen.
3266     if ([[self window] _isHostedInAnotherProcess])
3267         _inputViewBounds = [self.window convertRect:[endFrameValue CGRectValue] fromWindow:nil];
3268     else
3269         _inputViewBounds = [self.window convertRect:CGRectIntersection([endFrameValue CGRectValue], self.window.screen.bounds) fromWindow:nil];
3270
3271     if ([[UIPeripheralHost sharedInstance] isUndocked])
3272         _inputViewBounds = CGRectZero;
3273
3274     if (adjustScrollView) {
3275         CGFloat bottomInsetBeforeAdjustment = [_scrollView contentInset].bottom;
3276         SetForScope<BOOL> insetAdjustmentGuard(_currentlyAdjustingScrollViewInsetsForKeyboard, YES);
3277         [_scrollView _adjustForAutomaticKeyboardInfo:keyboardInfo animated:YES lastAdjustment:&_lastAdjustmentForScroller];
3278         CGFloat bottomInsetAfterAdjustment = [_scrollView contentInset].bottom;
3279         if (bottomInsetBeforeAdjustment != bottomInsetAfterAdjustment)
3280             _totalScrollViewBottomInsetAdjustmentForKeyboard += bottomInsetAfterAdjustment - bottomInsetBeforeAdjustment;
3281     }
3282
3283     [self _scheduleVisibleContentRectUpdate];
3284 }
3285
3286 - (BOOL)_shouldUpdateKeyboardWithInfo:(NSDictionary *)keyboardInfo
3287 {
3288     if ([_contentView isFocusingElement])
3289         return YES;
3290
3291     NSNumber *isLocalKeyboard = [keyboardInfo valueForKey:UIKeyboardIsLocalUserInfoKey];
3292     return isLocalKeyboard && !isLocalKeyboard.boolValue;
3293 }
3294
3295 - (void)_keyboardWillChangeFrame:(NSNotification *)notification
3296 {
3297     if ([self _shouldUpdateKeyboardWithInfo:notification.userInfo])
3298         [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:YES];
3299 }
3300
3301 - (void)_keyboardDidChangeFrame:(NSNotification *)notification
3302 {
3303     [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:NO];
3304 }
3305
3306 - (void)_keyboardWillShow:(NSNotification *)notification
3307 {
3308     if ([self _shouldUpdateKeyboardWithInfo:notification.userInfo])
3309         [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:YES];
3310
3311     _page->setIsKeyboardAnimatingIn(true);
3312 }
3313
3314 - (void)_keyboardDidShow:(NSNotification *)notification
3315 {
3316     _page->setIsKeyboardAnimatingIn(false);
3317 }
3318
3319 - (void)_keyboardWillHide:(NSNotification *)notification
3320 {
3321     // Ignore keyboard will hide notifications sent during rotation. They're just there for
3322     // backwards compatibility reasons and processing the will hide notification would
3323     // temporarily screw up the unobscured view area.
3324     if ([[UIPeripheralHost sharedInstance] rotationState])
3325         return;
3326
3327     [self _keyboardChangedWithInfo:notification.userInfo adjustScrollView:YES];
3328 }
3329
3330 static void hardwareKeyboardAvailabilityChangedCallback(CFNotificationCenterRef, void* observer, CFStringRef, const void*, CFDictionaryRef)
3331 {
3332     ASSERT(observer);
3333     WKWebView *webView = (__bridge WKWebView *)observer;
3334     webView._page->hardwareKeyboardAvailabilityChanged(GSEventIsHardwareKeyboardAttached());
3335 }
3336
3337 - (void)_windowDidRotate:(NSNotification *)notification
3338 {
3339     if (!_overridesInterfaceOrientation)
3340         [self _dispatchSetDeviceOrientation:deviceOrientation()];
3341 }
3342
3343 - (void)_contentSizeCategoryDidChange:(NSNotification *)notification
3344 {
3345     _page->contentSizeCategoryDidChange([self _contentSizeCategory]);
3346 }
3347
3348 - (NSString *)_contentSizeCategory
3349 {
3350     return [[UIApplication sharedApplication] preferredContentSizeCategory];
3351 }
3352
3353 - (void)_accessibilitySettingsDidChange:(NSNotification *)notification
3354 {
3355     _page->accessibilitySettingsDidChange();
3356 }
3357
3358 - (void)setAllowsBackForwardNavigationGestures:(BOOL)allowsBackForwardNavigationGestures
3359 {
3360     if (_allowsBackForwardNavigationGestures == allowsBackForwardNavigationGestures)
3361         return;
3362
3363     _allowsBackForwardNavigationGestures = allowsBackForwardNavigationGestures;
3364
3365     if (allowsBackForwardNavigationGestures && !_gestureController) {
3366         _gestureController = std::make_unique<WebKit::ViewGestureController>(*_page);
3367         _gestureController->installSwipeHandler(self, [self scrollView]);
3368         if (WKWebView *alternateWebView = [_configuration _alternateWebViewForNavigationGestures])
3369             _gestureController->setAlternateBackForwardListSourcePage(alternateWebView->_page.get());
3370     }
3371
3372     if (_gestureController)
3373         _gestureController->setSwipeGestureEnabled(allowsBackForwardNavigationGestures);
3374
3375     _page->setShouldRecordNavigationSnapshots(allowsBackForwardNavigationGestures);
3376 }
3377
3378 - (BOOL)allowsBackForwardNavigationGestures
3379 {
3380     return _allowsBackForwardNavigationGestures;
3381 }
3382
3383 - (BOOL)_isNavigationSwipeGestureRecognizer:(UIGestureRecognizer *)recognizer
3384 {
3385     if (!_gestureController)
3386         return NO;
3387     return _gestureController->isNavigationSwipeGestureRecognizer(recognizer);
3388 }
3389
3390 - (void)_navigationGestureDidBegin
3391 {
3392     // During a back/forward swipe, there's a view interposed between this view and the content view that has
3393     // an offset and animation on it, which results in computing incorrect rectangles. Work around by using
3394     // frozen rects during swipes.
3395     CGRect fullViewRect = self.bounds;
3396     CGRect unobscuredRect = UIEdgeInsetsInsetRect(fullViewRect, [self _computedObscuredInset]);
3397
3398     _frozenVisibleContentRect = [self convertRect:fullViewRect toView:_contentView.get()];
3399     _frozenUnobscuredContentRect = [self convertRect:unobscuredRect toView:_contentView.get()];
3400
3401     LOG_WITH_STREAM(VisibleRects, stream << "_navigationGestureDidBegin: freezing visibleContentRect " << WebCore::FloatRect(_frozenVisibleContentRect.value()) << " UnobscuredContentRect " << WebCore::FloatRect(_frozenUnobscuredContentRect.value()));
3402 }
3403
3404 - (void)_navigationGestureDidEnd
3405 {
3406     _frozenVisibleContentRect = WTF::nullopt;
3407     _frozenUnobscuredContentRect = WTF::nullopt;
3408 }
3409
3410 - (void)_showPasswordViewWithDocumentName:(NSString *)documentName passwordHandler:(void (^)(NSString *))passwordHandler
3411 {
3412     ASSERT(!_passwordView);
3413     _passwordView = adoptNS([[WKPasswordView alloc] initWithFrame:self.bounds documentName:documentName]);
3414     [_passwordView setUserDidEnterPassword:passwordHandler];
3415     [_passwordView showInScrollView:_scrollView.get()];
3416     self._currentContentView.hidden = YES;
3417 }
3418
3419 - (void)_hidePasswordView
3420 {
3421     if (!_passwordView)
3422         return;
3423
3424     self._currentContentView.hidden = NO;
3425     [_passwordView hide];
3426     _passwordView = nil;
3427 }
3428
3429 - (WKPasswordView *)_passwordView
3430 {
3431     return _passwordView.get();
3432 }
3433
3434 - (void)_updateScrollViewInsetAdjustmentBehavior
3435 {
3436 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000
3437     if (![_scrollView _contentInsetAdjustmentBehaviorWasExternallyOverridden])
3438         [_scrollView _setContentInsetAdjustmentBehaviorInternal:self._safeAreaShouldAffectObscuredInsets ? UIScrollViewContentInsetAdjustmentAlways : UIScrollViewContentInsetAdjustmentNever];
3439 #endif
3440 }
3441
3442 - (void)_setAvoidsUnsafeArea:(BOOL)avoidsUnsafeArea
3443 {
3444     if (_avoidsUnsafeArea == avoidsUnsafeArea)
3445         return;
3446
3447     _avoidsUnsafeArea = avoidsUnsafeArea;
3448
3449     [self _updateScrollViewInsetAdjustmentBehavior];
3450     [self _scheduleVisibleContentRectUpdate];
3451
3452     id <WKUIDelegatePrivate> uiDelegate = (id <WKUIDelegatePrivate>)[self UIDelegate];
3453     if ([uiDelegate respondsToSelector:@selector(_webView:didChangeSafeAreaShouldAffectObscuredInsets:)])
3454         [uiDelegate _webView:self didChangeSafeAreaShouldAffectObscuredInsets:avoidsUnsafeArea];
3455 }
3456
3457 - (BOOL)_haveSetObscuredInsets
3458 {
3459     return _haveSetObscuredInsets;
3460 }
3461
3462 #endif // PLATFORM(IOS_FAMILY)
3463
3464 #if ENABLE(ACCESSIBILITY_EVENTS)
3465
3466 static void accessibilityEventsEnabledChangedCallback(CFNotificationCenterRef, void* observer, CFStringRef, const void*, CFDictionaryRef)
3467 {
3468     ASSERT(observer);
3469     WKWebView *webview = (__bridge WKWebView *)observer;
3470     [webview _updateAccessibilityEventsEnabled];
3471 }
3472
3473 - (void)_updateAccessibilityEventsEnabled
3474 {
3475     if (!isNullFunctionPointer(_AXSWebAccessibilityEventsEnabled))
3476         _page->updateAccessibilityEventsEnabled(_AXSWebAccessibilityEventsEnabled());
3477 }
3478
3479 #endif
3480
3481 #pragma mark OS X-specific methods
3482
3483 #if PLATFORM(MAC)
3484
3485 - (BOOL)acceptsFirstResponder
3486 {
3487     return _impl->acceptsFirstResponder();
3488 }
3489
3490 - (BOOL)becomeFirstResponder
3491 {
3492     return _impl->becomeFirstResponder();
3493 }
3494
3495 - (BOOL)resignFirstResponder
3496 {
3497     return _impl->resignFirstResponder();
3498 }
3499
3500 - (void)viewWillStartLiveResize
3501 {
3502     _impl->viewWillStartLiveResize();
3503 }
3504
3505 - (void)viewDidEndLiveResize
3506 {
3507     _impl->viewDidEndLiveResize();
3508 }
3509
3510 - (BOOL)isFlipped
3511 {
3512     return YES;
3513 }
3514
3515 - (NSSize)intrinsicContentSize
3516 {
3517     return NSSizeFromCGSize(_impl->intrinsicContentSize());
3518 }
3519
3520 - (void)prepareContentInRect:(NSRect)rect
3521 {
3522     _impl->prepareContentInRect(NSRectToCGRect(rect));
3523 }
3524
3525 - (void)setFrameSize:(NSSize)size
3526 {
3527     [super setFrameSize:size];
3528     [_safeBrowsingWarning setFrame:self.bounds];
3529     _impl->setFrameSize(NSSizeToCGSize(size));
3530 }
3531
3532 IGNORE_WARNINGS_BEGIN("deprecated-implementations")
3533 - (void)renewGState
3534 IGNORE_WARNINGS_END
3535 {
3536     _impl->renewGState();
3537     [super renewGState];
3538 }
3539
3540 #define WEBCORE_COMMAND(command) - (void)command:(id)sender { _impl->executeEditCommandForSelector(_cmd); }
3541
3542 WEBCORE_COMMAND(alignCenter)
3543 WEBCORE_COMMAND(alignJustified)
3544 WEBCORE_COMMAND(alignLeft)
3545 WEBCORE_COMMAND(alignRight)
3546 WEBCORE_COMMAND(copy)
3547 WEBCORE_COMMAND(cut)
3548 WEBCORE_COMMAND(delete)
3549 WEBCORE_COMMAND(deleteBackward)
3550 WEBCORE_COMMAND(deleteBackwardByDecomposingPreviousCharacter)
3551 WEBCORE_COMMAND(deleteForward)
3552 WEBCORE_COMMAND(deleteToBeginningOfLine)
3553 WEBCORE_COMMAND(deleteToBeginningOfParagraph)
3554 WEBCORE_COMMAND(deleteToEndOfLine)
3555 WEBCORE_COMMAND(deleteToEndOfParagraph)
3556 WEBCORE_COMMAND(deleteToMark)
3557 WEBCORE_COMMAND(deleteWordBackward)
3558 WEBCORE_COMMAND(deleteWordForward)
3559 WEBCORE_COMMAND(ignoreSpelling)
3560 WEBCORE_COMMAND(indent)
3561 WEBCORE_COMMAND(insertBacktab)
3562 WEBCORE_COMMAND(insertLineBreak)
3563 WEBCORE_COMMAND(insertNewline)
3564 WEBCORE_COMMAND(insertNewlineIgnoringFieldEditor)
3565 WEBCORE_COMMAND(insertParagraphSeparator)
3566 WEBCORE_COMMAND(insertTab)
3567 WEBCORE_COMMAND(insertTabIgnoringFieldEditor)
3568 WEBCORE_COMMAND(makeTextWritingDirectionLeftToRight)
3569 WEBCORE_COMMAND(makeTextWritingDirectionNatural)
3570 WEBCORE_COMMAND(makeTextWritingDirectionRightToLeft)
3571 WEBCORE_COMMAND(moveBackward)
3572 WEBCORE_COMMAND(moveBackwardAndModifySelection)
3573 WEBCORE_COMMAND(moveDown)
3574 WEBCORE_COMMAND(moveDownAndModifySelection)
3575 WEBCORE_COMMAND(moveForward)
3576 WEBCORE_COMMAND(moveForwardAndModifySelection)
3577 WEBCORE_COMMAND(moveLeft)
3578 WEBCORE_COMMAND(moveLeftAndModifySelection)
3579 WEBCORE_COMMAND(moveParagraphBackwardAndModifySelection)
3580 WEBCORE_COMMAND(moveParagraphForwardAndModifySelection)
3581 WEBCORE_COMMAND(moveRight)
3582 WEBCORE_COMMAND(moveRightAndModifySelection)
3583 WEBCORE_COMMAND(moveToBeginningOfDocument)
3584 WEBCORE_COMMAND(moveToBeginningOfDocumentAndModifySelection)
3585 WEBCORE_COMMAND(moveToBeginningOfLine)
3586 WEBCORE_COMMAND(moveToBeginningOfLineAndModifySelection)
3587 WEBCORE_COMMAND(moveToBeginningOfParagraph)
3588 WEBCORE_COMMAND(moveToBeginningOfParagraphAndModifySelection)
3589 WEBCORE_COMMAND(moveToBeginningOfSentence)
3590 WEBCORE_COMMAND(moveToBeginningOfSentenceAndModifySelection)
3591 WEBCORE_COMMAND(moveToEndOfDocument)
3592 WEBCORE_COMMAND(moveToEndOfDocumentAndModifySelection)
3593 WEBCORE_COMMAND(moveToEndOfLine)
3594 WEBCORE_COMMAND(moveToEndOfLineAndModifySelection)
3595 WEBCORE_COMMAND(moveToEndOfParagraph)
3596 WEBCORE_COMMAND(moveToEndOfParagraphAndModifySelection)
3597 WEBCORE_COMMAND(moveToEndOfSentence)
3598 WEBCORE_COMMAND(moveToEndOfSentenceAndModifySelection)
3599 WEBCORE_COMMAND(moveToLeftEndOfLine)
3600 WEBCORE_COMMAND(moveToLeftEndOfLineAndModifySelection)
3601 WEBCORE_COMMAND(moveToRightEndOfLine)
3602 WEBCORE_COMMAND(moveToRightEndOfLineAndModifySelection)
3603 WEBCORE_COMMAND(moveUp)
3604 WEBCORE_COMMAND(moveUpAndModifySelection)
3605 WEBCORE_COMMAND(moveWordBackward)
3606 WEBCORE_COMMAND(moveWordBackwardAndModifySelection)
3607 WEBCORE_COMMAND(moveWordForward)
3608 WEBCORE_COMMAND(moveWordForwardAndModifySelection)
3609 WEBCORE_COMMAND(moveWordLeft)
3610 WEBCORE_COMMAND(moveWordLeftAndModifySelection)
3611 WEBCORE_COMMAND(moveWordRight)
3612 WEBCORE_COMMAND(moveWordRightAndModifySelection)
3613 WEBCORE_COMMAND(outdent)
3614 WEBCORE_COMMAND(pageDown)
3615 WEBCORE_COMMAND(pageDownAndModifySelection)
3616 WEBCORE_COMMAND(pageUp)
3617 WEBCORE_COMMAND(pageUpAndModifySelection)
3618 WEBCORE_COMMAND(paste)
3619 WEBCORE_COMMAND(pasteAsPlainText)
3620 WEBCORE_COMMAND(scrollPageDown)
3621 WEBCORE_COMMAND(scrollPageUp)
3622 WEBCORE_COMMAND(scrollLineDown)
3623 WEBCORE_COMMAND(scrollLineUp)
3624 WEBCORE_COMMAND(scrollToBeginningOfDocument)
3625 WEBCORE_COMMAND(scrollToEndOfDocument)
3626 WEBCORE_COMMAND(selectAll)
3627 WEBCORE_COMMAND(selectLine)
3628 WEBCORE_COMMAND(selectParagraph)
3629 WEBCORE_COMMAND(selectSentence)
3630 WEBCORE_COMMAND(selectToMark)
3631 WEBCORE_COMMAND(selectWord)
3632 WEBCORE_COMMAND(setMark)
3633 WEBCORE_COMMAND(subscript)
3634 WEBCORE_COMMAND(superscript)
3635 WEBCORE_COMMAND(swapWithMark)
3636 WEBCORE_COMMAND(takeFindStringFromSelection)
3637 WEBCORE_COMMAND(transpose)
3638 WEBCORE_COMMAND(underline)
3639 WEBCORE_COMMAND(unscript)
3640 WEBCORE_COMMAND(yank)
3641 WEBCORE_COMMAND(yankAndSelect)
3642
3643 #undef WEBCORE_COMMAND
3644
3645 - (BOOL)writeSelectionToPasteboard:(NSPasteboard *)pasteboard types:(NSArray *)types
3646 {
3647     return _impl->writeSelectionToPasteboard(pasteboard, types);
3648 }
3649
3650 - (void)centerSelectionInVisibleArea:(id)sender
3651 {
3652     _impl->centerSelectionInVisibleArea();
3653 }
3654
3655 - (id)validRequestorForSendType:(NSString *)sendType returnType:(NSString *)returnType
3656 {
3657     return _impl->validRequestorForSendAndReturnTypes(sendType, returnType);
3658 }
3659
3660 - (BOOL)readSelectionFromPasteboard:(NSPasteboard *)pasteboard
3661 {
3662     return _impl->readSelectionFromPasteboard(pasteboard);
3663 }
3664
3665 - (void)changeFont:(id)sender
3666 {
3667     _impl->changeFontFromFontManager();
3668 }
3669
3670 - (void)changeColor:(id)sender
3671 {
3672     _impl->changeFontColorFromSender(sender);
3673 }
3674
3675 - (void)changeAttributes:(id)sender
3676 {
3677     _impl->changeFontAttributesFromSender(sender);
3678 }
3679
3680 - (IBAction)startSpeaking:(id)sender
3681 {
3682     _impl->startSpeaking();
3683 }
3684
3685 - (IBAction)stopSpeaking:(id)sender
3686 {
3687     _impl->stopSpeaking(sender);
3688 }
3689
3690 - (IBAction)showGuessPanel:(id)sender
3691 {
3692     _impl->showGuessPanel(sender);
3693 }
3694
3695 - (IBAction)checkSpelling:(id)sender
3696 {
3697     _impl->checkSpelling();
3698 }
3699
3700 - (void)changeSpelling:(id)sender
3701 {
3702     _impl->changeSpelling(sender);
3703 }
3704
3705 - (IBAction)toggleContinuousSpellChecking:(id)sender
3706 {
3707     _impl->toggleContinuousSpellChecking();
3708 }
3709
3710 - (BOOL)isGrammarCheckingEnabled
3711 {
3712     return _impl->isGrammarCheckingEnabled();
3713 }
3714
3715 - (void)setGrammarCheckingEnabled:(BOOL)flag
3716 {
3717     _impl->setGrammarCheckingEnabled(flag);
3718 }
3719
3720 - (IBAction)toggleGrammarChecking:(id)sender
3721 {
3722     _impl->toggleGrammarChecking();
3723 }
3724
3725 - (IBAction)toggleAutomaticSpellingCorrection:(id)sender
3726 {
3727     _impl->toggleAutomaticSpellingCorrection();
3728 }
3729
3730 - (void)orderFrontSubstitutionsPanel:(id)sender
3731 {
3732     _impl->orderFrontSubstitutionsPanel(sender);
3733 }
3734
3735 - (IBAction)toggleSmartInsertDelete:(id)sender
3736 {
3737     _impl->toggleSmartInsertDelete();
3738 }
3739
3740 - (BOOL)isAutomaticQuoteSubstitutionEnabled
3741 {
3742     return _impl->isAutomaticQuoteSubstitutionEnabled();
3743 }
3744
3745 - (void)setAutomaticQuoteSubstitutionEnabled:(BOOL)flag
3746 {
3747     _impl->setAutomaticQuoteSubstitutionEnabled(flag);
3748 }
3749
3750 - (void)toggleAutomaticQuoteSubstitution:(id)sender
3751 {
3752     _impl->toggleAutomaticQuoteSubstitution();
3753 }
3754
3755 - (BOOL)isAutomaticDashSubstitutionEnabled
3756 {
3757     return _impl->isAutomaticDashSubstitutionEnabled();
3758 }
3759
3760 - (void)setAutomaticDashSubstitutionEnabled:(BOOL)flag
3761 {
3762     _impl->setAutomaticDashSubstitutionEnabled(flag);
3763 }
3764
3765 - (void)toggleAutomaticDashSubstitution:(id)sender
3766 {
3767     _impl->toggleAutomaticDashSubstitution();
3768 }
3769
3770 - (BOOL)isAutomaticLinkDetectionEnabled
3771 {
3772     return _impl->isAutomaticLinkDetectionEnabled();
3773 }
3774
3775 - (void)setAutomaticLinkDetectionEnabled:(BOOL)flag
3776 {
3777     _impl->setAutomaticLinkDetectionEnabled(flag);
3778 }
3779
3780 - (void)toggleAutomaticLinkDetection:(id)sender
3781 {
3782     _impl->toggleAutomaticLinkDetection();
3783 }
3784
3785 - (BOOL)isAutomaticTextReplacementEnabled
3786 {
3787     return _impl->isAutomaticTextReplacementEnabled();
3788 }
3789
3790 - (void)setAutomaticTextReplacementEnabled:(BOOL)flag
3791 {
3792     _impl->setAutomaticTextReplacementEnabled(flag);
3793 }
3794
3795 - (void)toggleAutomaticTextReplacement:(id)sender
3796 {
3797     _impl->toggleAutomaticTextReplacement();
3798 }
3799
3800 - (void)uppercaseWord:(id)sender
3801 {
3802     _impl->uppercaseWord();
3803 }
3804
3805 - (void)lowercaseWord:(id)sender
3806 {
3807     _impl->lowercaseWord();
3808 }
3809
3810 - (void)capitalizeWord:(id)sender
3811 {
3812     _impl->capitalizeWord();
3813 }
3814
3815 - (BOOL)_wantsKeyDownForEvent:(NSEvent *)event
3816 {
3817     return _impl->wantsKeyDownForEvent(event);
3818 }
3819
3820 - (void)scrollWheel:(NSEvent *)event
3821 {
3822     _impl->scrollWheel(event);
3823 }
3824
3825 - (void)swipeWithEvent:(NSEvent *)event
3826 {
3827     _impl->swipeWithEvent(event);
3828 }
3829
3830 - (void)mouseMoved:(NSEvent *)event
3831 {
3832     _impl->mouseMoved(event);
3833 }
3834
3835 - (void)mouseDown:(NSEvent *)event
3836 {
3837     _impl->mouseDown(event);
3838 }
3839
3840 - (void)mouseUp:(NSEvent *)event
3841 {
3842     _impl->mouseUp(event);
3843 }
3844
3845 - (void)mouseDragged:(NSEvent *)event
3846 {
3847     _impl->mouseDragged(event);
3848 }
3849
3850 - (void)mouseEntered:(NSEvent *)event
3851 {
3852     _impl->mouseEntered(event);
3853 }
3854
3855 - (void)mouseExited:(NSEvent *)event
3856 {
3857     _impl->mouseExited(event);
3858 }
3859
3860 - (void)otherMouseDown:(NSEvent *)event
3861 {
3862     _impl->otherMouseDown(event);
3863 }
3864
3865 - (void)otherMouseDragged:(NSEvent *)event
3866 {
3867     _impl->otherMouseDragged(event);
3868 }
3869
3870 - (void)otherMouseUp:(NSEvent *)event
3871 {
3872     _impl->otherMouseUp(event);
3873 }
3874
3875 - (void)rightMouseDown:(NSEvent *)event
3876 {
3877     _impl->rightMouseDown(event);
3878 }
3879
3880 - (void)rightMouseDragged:(NSEvent *)event
3881 {
3882     _impl->rightMouseDragged(event);
3883 }
3884
3885 - (void)rightMouseUp:(NSEvent *)event
3886 {
3887     _impl->rightMouseUp(event);
3888 }
3889
3890 - (void)pressureChangeWithEvent:(NSEvent *)event
3891 {
3892     _impl->pressureChangeWithEvent(event);
3893 }
3894
3895 - (BOOL)acceptsFirstMouse:(NSEvent *)event
3896 {
3897     return _impl->acceptsFirstMouse(event);
3898 }
3899
3900 - (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)event
3901 {
3902     return _impl->shouldDelayWindowOrderingForEvent(event);
3903 }
3904
3905 - (void)doCommandBySelector:(SEL)selector
3906 {
3907     _impl->doCommandBySelector(selector);
3908 }
3909
3910 - (void)insertText:(id)string
3911 {
3912     _impl->insertText(string);
3913 }
3914
3915 - (void)insertText:(id)string replacementRange:(NSRange)replacementRange
3916 {
3917     _impl->insertText(string, replacementRange);
3918 }
3919
3920 - (NSTextInputContext *)inputContext
3921 {
3922     if (!_impl)
3923         return nil;
3924     return _impl->inputContext();
3925 }
3926
3927 - (BOOL)performKeyEquivalent:(NSEvent *)event
3928 {
3929     return _impl->performKeyEquivalent(event);
3930 }
3931
3932 - (void)keyUp:(NSEvent *)theEvent
3933 {
3934     _impl->keyUp(theEvent);
3935 }
3936
3937 - (void)keyDown:(NSEvent *)theEvent
3938 {
3939     _impl->keyDown(theEvent);
3940 }
3941
3942 - (void)flagsChanged:(NSEvent *)theEvent
3943 {
3944     _impl->flagsChanged(theEvent);
3945 }
3946
3947 - (void)setMarkedText:(id)string selectedRange:(NSRange)newSelectedRange replacementRange:(NSRange)replacementRange
3948 {
3949     _impl->setMarkedText(string, newSelectedRange, replacementRange);
3950 }
3951
3952 - (void)unmarkText
3953 {
3954     _impl->unmarkText();
3955 }
3956
3957 - (NSRange)selectedRange
3958 {
3959     return _impl->selectedRange();
3960 }
3961
3962 - (BOOL)hasMarkedText
3963 {
3964     return _impl->hasMarkedText();
3965 }
3966
3967 - (NSRange)markedRange
3968 {
3969     return _impl->markedRange();
3970 }
3971
3972 - (NSAttributedString *)attributedSubstringForProposedRange:(NSRange)nsRange actualRange:(NSRangePointer)actualRange
3973 {
3974     return _impl->attributedSubstringForProposedRange(nsRange, actualRange);
3975 }
3976
3977 - (NSUInteger)characterIndexForPoint:(NSPoint)thePoint
3978 {
3979     return _impl->characterIndexForPoint(thePoint);
3980 }
3981
3982 - (void)typingAttributesWithCompletionHandler:(void(^)(NSDictionary<NSString *, id> *))completion
3983 {
3984     _impl->typingAttributesWithCompletionHandler(completion);
3985 }
3986
3987 - (NSRect)firstRectForCharacterRange:(NSRange)theRange actualRange:(NSRangePointer)actualRange
3988 {
3989     return _impl->firstRectForCharacterRange(theRange, actualRange);
3990 }
3991
3992 - (void)selectedRangeWithCompletionHandler:(void(^)(NSRange selectedRange))completionHandlerPtr
3993 {
3994     _impl->selectedRangeWithCompletionHandler(completionHandlerPtr);
3995 }
3996
3997 - (void)markedRangeWithCompletionHandler:(void(^)(NSRange markedRange))completionHandlerPtr
3998 {
3999     _impl->markedRangeWithCompletionHandler(completionHandlerPtr);
4000 }
4001
4002 - (void)hasMarkedTextWithCompletionHandler:(void(^)(BOOL hasMarkedText))completionHandlerPtr
4003 {
4004     _impl->hasMarkedTextWithCompletionHandler(completionHandlerPtr);
4005 }
4006
4007 - (void)attributedSubstringForProposedRange:(NSRange)nsRange completionHandler:(void(^)(NSAttributedString *attrString, NSRange actualRange))completionHandlerPtr
4008 {
4009     _impl->attributedSubstringForProposedRange(nsRange, completionHandlerPtr);
4010 }
4011
4012 - (void)firstRectForCharacterRange:(NSRange)theRange completionHandler:(void(^)(NSRect firstRect, NSRange actualRange))completionHandlerPtr
4013 {
4014     _impl->firstRectForCharacterRange(theRange, completionHandlerPtr);
4015 }
4016
4017 - (void)characterIndexForPoint:(NSPoint)thePoint completionHandler:(void(^)(NSUInteger))completionHandlerPtr
4018 {
4019     _impl->characterIndexForPoint(thePoint, completionHandlerPtr);
4020 }
4021
4022 - (NSArray *)validAttributesForMarkedText
4023 {
4024     return _impl->validAttributesForMarkedText();
4025 }
4026
4027 #if ENABLE(DRAG_SUPPORT)
4028 IGNORE_WARNINGS_BEGIN("deprecated-implementations")
4029 - (void)draggedImage:(NSImage *)image endedAt:(NSPoint)endPoint operation:(NSDragOperation)operation
4030 IGNORE_WARNINGS_END
4031 {
4032     _impl->draggedImage(image, NSPointToCGPoint(endPoint), operation);
4033 }
4034
4035 - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)draggingInfo
4036 {
4037     return _impl->draggingEntered(draggingInfo);
4038 }
4039
4040 - (NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)draggingInfo
4041 {
4042     return _impl->draggingUpdated(draggingInfo);
4043 }
4044