Source/WebCore: GIF animations don't restart after scrolling on iOS WebKit1
[WebKit-https.git] / Source / WebKit / mac / WebView / WebView.mm
1 /*
2  * Copyright (C) 2005-2013 Apple Inc. All rights reserved.
3  * Copyright (C) 2006 David Smith (catfish.man@gmail.com)
4  * Copyright (C) 2010 Igalia S.L
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1.  Redistributions of source code must retain the above copyright
11  *     notice, this list of conditions and the following disclaimer. 
12  * 2.  Redistributions in binary form must reproduce the above copyright
13  *     notice, this list of conditions and the following disclaimer in the
14  *     documentation and/or other materials provided with the distribution. 
15  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
16  *     its contributors may be used to endorse or promote products derived
17  *     from this software without specific prior written permission. 
18  *
19  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
20  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30
31 #import "WebViewInternal.h"
32 #import "WebViewData.h"
33
34 #import "DOMCSSStyleDeclarationInternal.h"
35 #import "DOMDocumentInternal.h"
36 #import "DOMNodeInternal.h"
37 #import "DOMRangeInternal.h"
38 #import "WebAlternativeTextClient.h"
39 #import "WebApplicationCache.h"
40 #import "WebBackForwardListInternal.h"
41 #import "WebBaseNetscapePluginView.h"
42 #import "WebCache.h"
43 #import "WebChromeClient.h"
44 #import "WebDOMOperationsPrivate.h"
45 #import "WebDataSourceInternal.h"
46 #import "WebDatabaseManagerPrivate.h"
47 #import "WebDefaultEditingDelegate.h"
48 #import "WebDefaultPolicyDelegate.h"
49 #import "WebDefaultUIDelegate.h"
50 #import "WebDelegateImplementationCaching.h"
51 #import "WebDeviceOrientationClient.h"
52 #import "WebDeviceOrientationProvider.h"
53 #import "WebDocument.h"
54 #import "WebDocumentInternal.h"
55 #import "WebDownload.h"
56 #import "WebDownloadInternal.h"
57 #import "WebDragClient.h"
58 #import "WebDynamicScrollBarsViewInternal.h"
59 #import "WebEditingDelegate.h"
60 #import "WebEditorClient.h"
61 #import "WebFormDelegatePrivate.h"
62 #import "WebFrameInternal.h"
63 #import "WebFrameLoaderClient.h"
64 #import "WebFrameNetworkingContext.h"
65 #import "WebFrameViewInternal.h"
66 #import "WebGeolocationClient.h"
67 #import "WebGeolocationPositionInternal.h"
68 #import "WebHTMLRepresentation.h"
69 #import "WebHTMLViewInternal.h"
70 #import "WebHistoryItemInternal.h"
71 #import "WebIconDatabaseInternal.h"
72 #import "WebInspector.h"
73 #import "WebInspectorClient.h"
74 #import "WebKitErrors.h"
75 #import "WebKitFullScreenListener.h"
76 #import "WebKitLogging.h"
77 #import "WebKitNSStringExtras.h"
78 #import "WebKitStatisticsPrivate.h"
79 #import "WebKitSystemBits.h"
80 #import "WebKitVersionChecks.h"
81 #import "WebLocalizableStrings.h"
82 #import "WebNSDataExtras.h"
83 #import "WebNSDataExtrasPrivate.h"
84 #import "WebNSDictionaryExtras.h"
85 #import "WebNSURLExtras.h"
86 #import "WebNSURLRequestExtras.h"
87 #import "WebNSViewExtras.h"
88 #import "WebNodeHighlight.h"
89 #import "WebNotificationClient.h"
90 #import "WebPDFView.h"
91 #import "WebPanelAuthenticationHandler.h"
92 #import "WebPlatformStrategies.h"
93 #import "WebPluginDatabase.h"
94 #import "WebPolicyDelegate.h"
95 #import "WebPreferenceKeysPrivate.h"
96 #import "WebPreferencesPrivate.h"
97 #import "WebProgressTrackerClient.h"
98 #import "WebScriptDebugDelegate.h"
99 #import "WebScriptWorldInternal.h"
100 #import "WebStorageManagerInternal.h"
101 #import "WebSystemInterface.h"
102 #import "WebTextCompletionController.h"
103 #import "WebTextIterator.h"
104 #import "WebUIDelegate.h"
105 #import "WebUIDelegatePrivate.h"
106 #import "WebUserMediaClient.h"
107 #import "WebViewGroup.h"
108 #import <CoreFoundation/CFSet.h>
109 #import <Foundation/NSURLConnection.h>
110 #import <JavaScriptCore/APICast.h>
111 #import <JavaScriptCore/JSValueRef.h>
112 #import <WebCore/AlternativeTextUIController.h>
113 #import <WebCore/AnimationController.h>
114 #import <WebCore/ApplicationCacheStorage.h>
115 #import <WebCore/BackForwardController.h>
116 #import <WebCore/BackForwardList.h>
117 #import <WebCore/MemoryCache.h>
118 #import <WebCore/Chrome.h>
119 #import <WebCore/ColorMac.h>
120 #import <WebCore/Cursor.h>
121 #import <WebCore/DatabaseManager.h>
122 #import <WebCore/Document.h>
123 #import <WebCore/DocumentLoader.h>
124 #import <WebCore/DragController.h>
125 #import <WebCore/DragData.h>
126 #import <WebCore/Editor.h>
127 #import <WebCore/EventHandler.h>
128 #import <WebCore/ExceptionHandlers.h>
129 #import <WebCore/FocusController.h>
130 #import <WebCore/FrameLoader.h>
131 #import <WebCore/FrameSelection.h>
132 #import <WebCore/FrameTree.h>
133 #import <WebCore/FrameView.h>
134 #import <WebCore/GCController.h>
135 #import <WebCore/GeolocationController.h>
136 #import <WebCore/GeolocationError.h>
137 #import <WebCore/HTMLMediaElement.h>
138 #import <WebCore/HTMLNames.h>
139 #import <WebCore/HistoryController.h>
140 #import <WebCore/HistoryItem.h>
141 #import <WebCore/IconDatabase.h>
142 #import <WebCore/JSCSSStyleDeclaration.h>
143 #import <WebCore/JSDocument.h>
144 #import <WebCore/JSElement.h>
145 #import <WebCore/JSNodeList.h>
146 #import <WebCore/JSNotification.h>
147 #import <WebCore/Logging.h>
148 #import <WebCore/MIMETypeRegistry.h>
149 #import <WebCore/MainFrame.h>
150 #import <WebCore/MemoryPressureHandler.h>
151 #import <WebCore/NodeList.h>
152 #import <WebCore/Notification.h>
153 #import <WebCore/NotificationController.h>
154 #import <WebCore/Page.h>
155 #import <WebCore/PageCache.h>
156 #import <WebCore/PageGroup.h>
157 #import <WebCore/PlatformEventFactoryMac.h>
158 #import <WebCore/ProgressTracker.h>
159 #import <WebCore/RenderView.h>
160 #import <WebCore/RenderWidget.h>
161 #import <WebCore/ResourceHandle.h>
162 #import <WebCore/ResourceLoadScheduler.h>
163 #import <WebCore/ResourceRequest.h>
164 #import <WebCore/RuntimeApplicationChecks.h>
165 #import <WebCore/RuntimeEnabledFeatures.h>
166 #import <WebCore/SchemeRegistry.h>
167 #import <WebCore/ScriptController.h>
168 #import <WebCore/SecurityOrigin.h>
169 #import <WebCore/SecurityPolicy.h>
170 #import <WebCore/Settings.h>
171 #import <WebCore/StyleProperties.h>
172 #import <WebCore/TextResourceDecoder.h>
173 #import <WebCore/ThreadCheck.h>
174 #import <WebCore/UserAgent.h>
175 #import <WebCore/WebCoreObjCExtras.h>
176 #import <WebCore/WebCoreView.h>
177 #import <WebCore/Widget.h>
178 #import <WebKitLegacy/DOM.h>
179 #import <WebKitLegacy/DOMExtensions.h>
180 #import <WebKitLegacy/DOMPrivate.h>
181 #import <WebKitSystemInterface.h>
182 #import <bindings/ScriptValue.h>
183 #import <mach-o/dyld.h>
184 #import <objc/objc-auto.h>
185 #import <objc/runtime.h>
186 #import <runtime/ArrayPrototype.h>
187 #import <runtime/DateInstance.h>
188 #import <runtime/InitializeThreading.h>
189 #import <runtime/JSLock.h>
190 #import <runtime/JSCJSValue.h>
191 #import <wtf/Assertions.h>
192 #import <wtf/HashTraits.h>
193 #import <wtf/MainThread.h>
194 #import <wtf/ObjcRuntimeExtras.h>
195 #import <wtf/RefCountedLeakCounter.h>
196 #import <wtf/RefPtr.h>
197 #import <wtf/RunLoop.h>
198 #import <wtf/StdLibExtras.h>
199
200 #if !PLATFORM(IOS)
201 #import "WebContextMenuClient.h"
202 #import "WebFullScreenController.h"
203 #import "WebNSEventExtras.h"
204 #import "WebNSObjectExtras.h"
205 #import "WebNSPasteboardExtras.h"
206 #import "WebNSPrintOperationExtras.h"
207 #import "WebPDFView.h"
208 #import <WebCore/WebVideoFullscreenController.h>
209 #else
210 #import "MemoryMeasure.h"
211 #import "WebCaretChangeListener.h"
212 #import "WebChromeClientIOS.h"
213 #import "WebDefaultFormDelegate.h"
214 #import "WebDefaultFrameLoadDelegate.h"
215 #import "WebDefaultResourceLoadDelegate.h"
216 #import "WebDefaultUIKitDelegate.h"
217 #import "WebFixedPositionContent.h"
218 #import "WebMailDelegate.h"
219 #import "WebNSUserDefaultsExtras.h"
220 #import "WebPDFViewIOS.h"
221 #import "WebPlainWhiteView.h"
222 #import "WebPluginController.h"
223 #import "WebPolicyDelegatePrivate.h"
224 #import "WebSQLiteDatabaseTrackerClient.h"
225 #import "WebStorageManagerPrivate.h"
226 #import "WebUIKitSupport.h"
227 #import "WebVisiblePosition.h"
228 #import <CFNetwork/CFURLCachePriv.h>
229 #import <MobileGestalt.h>
230 #import <WebCore/EventNames.h>
231 #import <WebCore/FontCache.h>
232 #import <WebCore/GraphicsLayer.h>
233 #import <WebCore/IconController.h>
234 #import <WebCore/LegacyTileCache.h>
235 #import <WebCore/NetworkStateNotifier.h>
236 #import <WebCore/RuntimeApplicationChecksIOS.h>
237 #import <WebCore/SQLiteDatabaseTracker.h>
238 #import <WebCore/SmartReplace.h>
239 #import <WebCore/TextRun.h>
240 #import <WebCore/TileControllerMemoryHandlerIOS.h>
241 #import <WebCore/WAKWindow.h>
242 #import <WebCore/WKView.h>
243 #import <WebCore/WebCoreThread.h>
244 #import <WebCore/WebCoreThreadMessage.h>
245 #import <WebCore/WebCoreThreadRun.h>
246 #import <WebCore/WebEvent.h>
247 #import <WebCore/WebVideoFullscreenControllerAVKit.h>
248 #import <dispatch/private.h>
249 #import <wtf/FastMalloc.h>
250 #endif // !PLATFORM(IOS)
251
252 #if ENABLE(DASHBOARD_SUPPORT)
253 #import <WebKitLegacy/WebDashboardRegion.h>
254 #endif
255
256 #if ENABLE(DISK_IMAGE_CACHE) && PLATFORM(IOS)
257 #import "WebDiskImageCacheClientIOS.h"
258 #import <WebCore/DiskImageCacheIOS.h>
259 #endif
260
261 #if ENABLE(REMOTE_INSPECTOR)
262 #import <JavaScriptCore/RemoteInspector.h>
263 #if PLATFORM(IOS)
264 #import "WebIndicateLayer.h"
265 #endif
266 #endif
267
268 #if USE(GLIB)
269 #import <glib.h>
270 #endif
271
272 #if USE(QUICK_LOOK)
273 #include <WebCore/QuickLook.h>
274 #endif
275
276 #if ENABLE(TOUCH_EVENTS)
277 #import <WebCore/WebEventRegion.h>
278 #endif
279
280 #if ENABLE(DISK_IMAGE_CACHE)
281 #import "WebDiskImageCacheClientIOS.h"
282 #import <WebCore/DiskImageCacheIOS.h>
283 #endif
284
285 #if !PLATFORM(IOS)
286 @interface NSSpellChecker (WebNSSpellCheckerDetails)
287 - (void)_preflightChosenSpellServer;
288 @end
289
290 @interface NSView (WebNSViewDetails)
291 - (NSView *)_hitTest:(NSPoint *)aPoint dragTypes:(NSSet *)types;
292 - (void)_autoscrollForDraggingInfo:(id)dragInfo timeDelta:(NSTimeInterval)repeatDelta;
293 - (BOOL)_shouldAutoscrollForDraggingInfo:(id)dragInfo;
294 @end
295
296 @interface NSWindow (WebNSWindowDetails)
297 - (id)_oldFirstResponderBeforeBecoming;
298 - (void)_enableScreenUpdatesIfNeeded;
299 - (BOOL)_wrapsCarbonWindow;
300 - (BOOL)_hasKeyAppearance;
301 @end
302 #endif
303
304 using namespace JSC;
305 using namespace Inspector;
306 using namespace WebCore;
307
308 #define FOR_EACH_RESPONDER_SELECTOR(macro) \
309 macro(alignCenter) \
310 macro(alignJustified) \
311 macro(alignLeft) \
312 macro(alignRight) \
313 macro(capitalizeWord) \
314 macro(centerSelectionInVisibleArea) \
315 macro(changeAttributes) \
316 macro(changeBaseWritingDirection) \
317 macro(changeBaseWritingDirectionToLTR) \
318 macro(changeBaseWritingDirectionToRTL) \
319 macro(changeColor) \
320 macro(changeDocumentBackgroundColor) \
321 macro(changeFont) \
322 macro(changeSpelling) \
323 macro(checkSpelling) \
324 macro(complete) \
325 macro(copy) \
326 macro(copyFont) \
327 macro(cut) \
328 macro(delete) \
329 macro(deleteBackward) \
330 macro(deleteBackwardByDecomposingPreviousCharacter) \
331 macro(deleteForward) \
332 macro(deleteToBeginningOfLine) \
333 macro(deleteToBeginningOfParagraph) \
334 macro(deleteToEndOfLine) \
335 macro(deleteToEndOfParagraph) \
336 macro(deleteToMark) \
337 macro(deleteWordBackward) \
338 macro(deleteWordForward) \
339 macro(ignoreSpelling) \
340 macro(indent) \
341 macro(insertBacktab) \
342 macro(insertLineBreak) \
343 macro(insertNewline) \
344 macro(insertNewlineIgnoringFieldEditor) \
345 macro(insertParagraphSeparator) \
346 macro(insertTab) \
347 macro(insertTabIgnoringFieldEditor) \
348 macro(lowercaseWord) \
349 macro(makeBaseWritingDirectionLeftToRight) \
350 macro(makeBaseWritingDirectionRightToLeft) \
351 macro(makeTextWritingDirectionLeftToRight) \
352 macro(makeTextWritingDirectionNatural) \
353 macro(makeTextWritingDirectionRightToLeft) \
354 macro(moveBackward) \
355 macro(moveBackwardAndModifySelection) \
356 macro(moveDown) \
357 macro(moveDownAndModifySelection) \
358 macro(moveForward) \
359 macro(moveForwardAndModifySelection) \
360 macro(moveLeft) \
361 macro(moveLeftAndModifySelection) \
362 macro(moveParagraphBackwardAndModifySelection) \
363 macro(moveParagraphForwardAndModifySelection) \
364 macro(moveRight) \
365 macro(moveRightAndModifySelection) \
366 macro(moveToBeginningOfDocument) \
367 macro(moveToBeginningOfDocumentAndModifySelection) \
368 macro(moveToBeginningOfLine) \
369 macro(moveToBeginningOfLineAndModifySelection) \
370 macro(moveToBeginningOfParagraph) \
371 macro(moveToBeginningOfParagraphAndModifySelection) \
372 macro(moveToBeginningOfSentence) \
373 macro(moveToBeginningOfSentenceAndModifySelection) \
374 macro(moveToEndOfDocument) \
375 macro(moveToEndOfDocumentAndModifySelection) \
376 macro(moveToEndOfLine) \
377 macro(moveToEndOfLineAndModifySelection) \
378 macro(moveToEndOfParagraph) \
379 macro(moveToEndOfParagraphAndModifySelection) \
380 macro(moveToEndOfSentence) \
381 macro(moveToEndOfSentenceAndModifySelection) \
382 macro(moveToLeftEndOfLine) \
383 macro(moveToLeftEndOfLineAndModifySelection) \
384 macro(moveToRightEndOfLine) \
385 macro(moveToRightEndOfLineAndModifySelection) \
386 macro(moveUp) \
387 macro(moveUpAndModifySelection) \
388 macro(moveWordBackward) \
389 macro(moveWordBackwardAndModifySelection) \
390 macro(moveWordForward) \
391 macro(moveWordForwardAndModifySelection) \
392 macro(moveWordLeft) \
393 macro(moveWordLeftAndModifySelection) \
394 macro(moveWordRight) \
395 macro(moveWordRightAndModifySelection) \
396 macro(orderFrontSubstitutionsPanel) \
397 macro(outdent) \
398 macro(overWrite) \
399 macro(pageDown) \
400 macro(pageDownAndModifySelection) \
401 macro(pageUp) \
402 macro(pageUpAndModifySelection) \
403 macro(paste) \
404 macro(pasteAsPlainText) \
405 macro(pasteAsRichText) \
406 macro(pasteFont) \
407 macro(performFindPanelAction) \
408 macro(scrollLineDown) \
409 macro(scrollLineUp) \
410 macro(scrollPageDown) \
411 macro(scrollPageUp) \
412 macro(scrollToBeginningOfDocument) \
413 macro(scrollToEndOfDocument) \
414 macro(selectAll) \
415 macro(selectLine) \
416 macro(selectParagraph) \
417 macro(selectSentence) \
418 macro(selectToMark) \
419 macro(selectWord) \
420 macro(setMark) \
421 macro(showGuessPanel) \
422 macro(startSpeaking) \
423 macro(stopSpeaking) \
424 macro(subscript) \
425 macro(superscript) \
426 macro(swapWithMark) \
427 macro(takeFindStringFromSelection) \
428 macro(toggleBaseWritingDirection) \
429 macro(transpose) \
430 macro(underline) \
431 macro(unscript) \
432 macro(uppercaseWord) \
433 macro(yank) \
434 macro(yankAndSelect) \
435
436 #define WebKitOriginalTopPrintingMarginKey @"WebKitOriginalTopMargin"
437 #define WebKitOriginalBottomPrintingMarginKey @"WebKitOriginalBottomMargin"
438
439 #define KeyboardUIModeDidChangeNotification @"com.apple.KeyboardUIModeDidChange"
440 #define AppleKeyboardUIMode CFSTR("AppleKeyboardUIMode")
441
442 static BOOL s_didSetCacheModel;
443 static WebCacheModel s_cacheModel = WebCacheModelDocumentViewer;
444
445 #if PLATFORM(IOS)
446 static Class s_pdfRepresentationClass;
447 static Class s_pdfViewClass;
448 #endif
449
450 #ifndef NDEBUG
451 static const char webViewIsOpen[] = "At least one WebView is still open.";
452 #endif
453
454 #if PLATFORM(IOS)
455 @interface WebView(WebViewPrivate)
456 - (void)_preferencesChanged:(WebPreferences *)preferences;
457 - (void)_updateScreenScaleFromWindow;
458 @end
459
460 @interface NSURLCache (WebPrivate)
461 - (CFURLCacheRef)_CFURLCache;
462 @end
463 #endif
464
465 #if !PLATFORM(IOS)
466 @interface NSObject (WebValidateWithoutDelegate)
467 - (BOOL)validateUserInterfaceItemWithoutDelegate:(id <NSValidatedUserInterfaceItem>)item;
468 @end
469 #endif
470
471 #if PLATFORM(IOS)
472 @class _WebSafeForwarder;
473
474 @interface _WebSafeAsyncForwarder : NSObject {
475     _WebSafeForwarder *_forwarder;
476 }
477 - (id)initWithForwarder:(_WebSafeForwarder *)forwarder;
478 @end
479 #endif
480
481 @interface _WebSafeForwarder : NSObject
482 {
483     id target; // Non-retained. Don't retain delegates.
484     id defaultTarget;
485 #if PLATFORM(IOS)
486     _WebSafeAsyncForwarder *asyncForwarder;
487     dispatch_once_t asyncForwarderPred;
488 #endif
489 }
490 - (instancetype)initWithTarget:(id)target defaultTarget:(id)defaultTarget;
491 #if PLATFORM(IOS)
492 - (void)clearTarget;
493 - (id)asyncForwarder;
494 #endif
495 @end
496
497 FindOptions coreOptions(WebFindOptions options)
498 {
499     return (options & WebFindOptionsCaseInsensitive ? CaseInsensitive : 0)
500         | (options & WebFindOptionsAtWordStarts ? AtWordStarts : 0)
501         | (options & WebFindOptionsTreatMedialCapitalAsWordStart ? TreatMedialCapitalAsWordStart : 0)
502         | (options & WebFindOptionsBackwards ? Backwards : 0)
503         | (options & WebFindOptionsWrapAround ? WrapAround : 0)
504         | (options & WebFindOptionsStartInSelection ? StartInSelection : 0);
505 }
506
507 LayoutMilestones coreLayoutMilestones(WebLayoutMilestones milestones)
508 {
509     return (milestones & WebDidFirstLayout ? DidFirstLayout : 0)
510         | (milestones & WebDidFirstVisuallyNonEmptyLayout ? DidFirstVisuallyNonEmptyLayout : 0)
511         | (milestones & WebDidHitRelevantRepaintedObjectsAreaThreshold ? DidHitRelevantRepaintedObjectsAreaThreshold : 0);
512 }
513
514 WebLayoutMilestones kitLayoutMilestones(LayoutMilestones milestones)
515 {
516     return (milestones & DidFirstLayout ? WebDidFirstLayout : 0)
517         | (milestones & DidFirstVisuallyNonEmptyLayout ? WebDidFirstVisuallyNonEmptyLayout : 0)
518         | (milestones & DidHitRelevantRepaintedObjectsAreaThreshold ? WebDidHitRelevantRepaintedObjectsAreaThreshold : 0);
519 }
520
521 static WebPageVisibilityState kit(PageVisibilityState visibilityState)
522 {
523     switch (visibilityState) {
524     case PageVisibilityStateVisible:
525         return WebPageVisibilityStateVisible;
526     case PageVisibilityStateHidden:
527         return WebPageVisibilityStateHidden;
528     case PageVisibilityStatePrerender:
529         return WebPageVisibilityStatePrerender;
530     }
531
532     ASSERT_NOT_REACHED();
533     return WebPageVisibilityStateVisible;
534 }
535
536 @interface WebView (WebFileInternal)
537 #if !PLATFORM(IOS)
538 - (float)_deviceScaleFactor;
539 #endif
540 - (BOOL)_isLoading;
541 - (WebFrameView *)_frameViewAtWindowPoint:(NSPoint)point;
542 - (WebFrame *)_focusedFrame;
543 + (void)_preflightSpellChecker;
544 - (BOOL)_continuousCheckingAllowed;
545 - (NSResponder *)_responderForResponderOperations;
546 #if USE(GLIB)
547 - (void)_clearGlibLoopObserver;
548 #endif
549 @end
550
551 NSString *WebElementDOMNodeKey =            @"WebElementDOMNode";
552 NSString *WebElementFrameKey =              @"WebElementFrame";
553 NSString *WebElementImageKey =              @"WebElementImage";
554 NSString *WebElementImageAltStringKey =     @"WebElementImageAltString";
555 NSString *WebElementImageRectKey =          @"WebElementImageRect";
556 NSString *WebElementImageURLKey =           @"WebElementImageURL";
557 NSString *WebElementIsSelectedKey =         @"WebElementIsSelected";
558 NSString *WebElementLinkLabelKey =          @"WebElementLinkLabel";
559 NSString *WebElementLinkTargetFrameKey =    @"WebElementTargetFrame";
560 NSString *WebElementLinkTitleKey =          @"WebElementLinkTitle";
561 NSString *WebElementLinkURLKey =            @"WebElementLinkURL";
562 NSString *WebElementMediaURLKey =           @"WebElementMediaURL";
563 NSString *WebElementSpellingToolTipKey =    @"WebElementSpellingToolTip";
564 NSString *WebElementTitleKey =              @"WebElementTitle";
565 NSString *WebElementLinkIsLiveKey =         @"WebElementLinkIsLive";
566 NSString *WebElementIsInScrollBarKey =      @"WebElementIsInScrollBar";
567 NSString *WebElementIsContentEditableKey =  @"WebElementIsContentEditableKey";
568
569 NSString *WebViewProgressStartedNotification =          @"WebProgressStartedNotification";
570 NSString *WebViewProgressEstimateChangedNotification =  @"WebProgressEstimateChangedNotification";
571 #if !PLATFORM(IOS)
572 NSString *WebViewProgressFinishedNotification =         @"WebProgressFinishedNotification";
573 #else
574 NSString * const WebViewProgressEstimatedProgressKey = @"WebProgressEstimatedProgressKey";
575 NSString * const WebViewProgressBackgroundColorKey =   @"WebProgressBackgroundColorKey";
576 #endif
577
578 NSString * const WebViewDidBeginEditingNotification =         @"WebViewDidBeginEditingNotification";
579 NSString * const WebViewDidChangeNotification =               @"WebViewDidChangeNotification";
580 NSString * const WebViewDidEndEditingNotification =           @"WebViewDidEndEditingNotification";
581 NSString * const WebViewDidChangeTypingStyleNotification =    @"WebViewDidChangeTypingStyleNotification";
582 NSString * const WebViewDidChangeSelectionNotification =      @"WebViewDidChangeSelectionNotification";
583
584 enum { WebViewVersion = 4 };
585
586 #define timedLayoutSize 4096
587
588 static NSMutableSet *schemesWithRepresentationsSet;
589
590 #if !PLATFORM(IOS)
591 NSString *_WebCanGoBackKey =            @"canGoBack";
592 NSString *_WebCanGoForwardKey =         @"canGoForward";
593 NSString *_WebEstimatedProgressKey =    @"estimatedProgress";
594 NSString *_WebIsLoadingKey =            @"isLoading";
595 NSString *_WebMainFrameIconKey =        @"mainFrameIcon";
596 NSString *_WebMainFrameTitleKey =       @"mainFrameTitle";
597 NSString *_WebMainFrameURLKey =         @"mainFrameURL";
598 NSString *_WebMainFrameDocumentKey =    @"mainFrameDocument";
599 #endif
600
601 #if USE(QUICK_LOOK)
602 NSString *WebQuickLookFileNameKey = @"WebQuickLookFileNameKey";
603 NSString *WebQuickLookUTIKey      = @"WebQuickLookUTIKey";
604 #endif
605
606 NSString *_WebViewDidStartAcceleratedCompositingNotification = @"_WebViewDidStartAcceleratedCompositing";
607 NSString * const WebViewWillCloseNotification = @"WebViewWillCloseNotification";
608
609 #if ENABLE(REMOTE_INSPECTOR)
610 // FIXME: Legacy, remove this, switch to something from JavaScriptCore Inspector::RemoteInspectorServer.
611 NSString *_WebViewRemoteInspectorHasSessionChangedNotification = @"_WebViewRemoteInspectorHasSessionChangedNotification";
612 #endif
613
614 NSString *WebKitKerningAndLigaturesEnabledByDefaultDefaultsKey = @"WebKitKerningAndLigaturesEnabledByDefault";
615
616 @interface WebProgressItem : NSObject
617 {
618 @public
619     long long bytesReceived;
620     long long estimatedLength;
621 }
622 @end
623
624 @implementation WebProgressItem
625 @end
626
627 static BOOL continuousSpellCheckingEnabled;
628 #if !PLATFORM(IOS)
629 static BOOL grammarCheckingEnabled;
630 static BOOL automaticQuoteSubstitutionEnabled;
631 static BOOL automaticLinkDetectionEnabled;
632 static BOOL automaticDashSubstitutionEnabled;
633 static BOOL automaticTextReplacementEnabled;
634 static BOOL automaticSpellingCorrectionEnabled;
635 #endif
636
637 @implementation WebView (AllWebViews)
638
639 static CFSetCallBacks NonRetainingSetCallbacks = {
640     0,
641     NULL,
642     NULL,
643     CFCopyDescription,
644     CFEqual,
645     CFHash
646 };
647
648 static CFMutableSetRef allWebViewsSet;
649
650 + (void)_makeAllWebViewsPerformSelector:(SEL)selector
651 {
652     if (!allWebViewsSet)
653         return;
654
655     [(NSMutableSet *)allWebViewsSet makeObjectsPerformSelector:selector];
656 }
657
658 - (void)_removeFromAllWebViewsSet
659 {
660     if (allWebViewsSet)
661         CFSetRemoveValue(allWebViewsSet, self);
662 }
663
664 - (void)_addToAllWebViewsSet
665 {
666     if (!allWebViewsSet)
667         allWebViewsSet = CFSetCreateMutable(NULL, 0, &NonRetainingSetCallbacks);
668
669     CFSetSetValue(allWebViewsSet, self);
670 }
671
672 @end
673
674 @implementation WebView (WebPrivate)
675
676 static String userVisibleWebKitVersionString()
677 {
678     // If the version is longer than 3 digits then the leading digits represent the version of the OS. Our user agent
679     // string should not include the leading digits, so strip them off and report the rest as the version. <rdar://problem/4997547>
680     NSString *fullVersion = [[NSBundle bundleForClass:[WebView class]] objectForInfoDictionaryKey:(NSString *)kCFBundleVersionKey];
681     NSRange nonDigitRange = [fullVersion rangeOfCharacterFromSet:[[NSCharacterSet decimalDigitCharacterSet] invertedSet]];
682     if (nonDigitRange.location == NSNotFound && fullVersion.length > 3)
683         return [fullVersion substringFromIndex:fullVersion.length - 3];
684     if (nonDigitRange.location != NSNotFound && nonDigitRange.location > 3)
685         return [fullVersion substringFromIndex:nonDigitRange.location - 3];
686     return fullVersion;
687 }
688
689 + (NSString *)_standardUserAgentWithApplicationName:(NSString *)applicationName
690 {
691     return standardUserAgentWithApplicationName(applicationName, userVisibleWebKitVersionString());
692 }
693
694 #if PLATFORM(IOS)
695 - (void)_setBrowserUserAgentProductVersion:(NSString *)productVersion buildVersion:(NSString *)buildVersion bundleVersion:(NSString *)bundleVersion
696 {
697     [self setApplicationNameForUserAgent:[NSString stringWithFormat:@"Version/%@ Mobile/%@ Safari/%@", productVersion, buildVersion, bundleVersion]];
698 }
699
700 - (void)_setUIWebViewUserAgentWithBuildVersion:(NSString *)buildVersion
701 {
702     [self setApplicationNameForUserAgent:[@"Mobile/" stringByAppendingString:buildVersion]];
703 }
704 #endif // PLATFORM(IOS)
705
706 + (void)_reportException:(JSValueRef)exception inContext:(JSContextRef)context
707 {
708     if (!exception || !context)
709         return;
710
711     JSC::ExecState* execState = toJS(context);
712     JSLockHolder lock(execState);
713
714     // Make sure the context has a DOMWindow global object, otherwise this context didn't originate from a WebView.
715     if (!toJSDOMWindow(execState->lexicalGlobalObject()))
716         return;
717
718     reportException(execState, toJS(execState, exception));
719 }
720
721 static void WebKitInitializeApplicationCachePathIfNecessary()
722 {
723     static BOOL initialized = NO;
724     if (initialized)
725         return;
726
727     NSString *appName = [[NSBundle mainBundle] bundleIdentifier];
728     if (!appName)
729         appName = [[NSProcessInfo processInfo] processName];
730 #if PLATFORM(IOS)
731     if (WebCore::applicationIsMobileSafari() || WebCore::applicationIsWebApp())
732         appName = @"com.apple.WebAppCache";
733 #endif
734
735     ASSERT(appName);
736
737     NSString* cacheDir = [NSString _webkit_localCacheDirectoryWithBundleIdentifier:appName];
738
739     cacheStorage().setCacheDirectory(cacheDir);
740     initialized = YES;
741 }
742
743 static bool shouldEnableLoadDeferring()
744 {
745     return !applicationIsAdobeInstaller();
746 }
747
748 static bool shouldRestrictWindowFocus()
749 {
750 #if PLATFORM(IOS)
751     return true;
752 #else
753     return !applicationIsHRBlock();
754 #endif
755 }
756
757 - (void)_dispatchPendingLoadRequests
758 {
759     resourceLoadScheduler()->servePendingRequests();
760 }
761
762 #if !PLATFORM(IOS)
763 - (void)_registerDraggedTypes
764 {
765     NSArray *editableTypes = [WebHTMLView _insertablePasteboardTypes];
766     NSArray *URLTypes = [NSPasteboard _web_dragTypesForURL];
767     NSMutableSet *types = [[NSMutableSet alloc] initWithArray:editableTypes];
768     [types addObjectsFromArray:URLTypes];
769     [self registerForDraggedTypes:[types allObjects]];
770     [types release];
771 }
772
773 static bool needsOutlookQuirksScript()
774 {
775     static bool isOutlookNeedingQuirksScript = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_HTML5_PARSER)
776         && applicationIsMicrosoftOutlook();
777     return isOutlookNeedingQuirksScript;
778 }
779
780 static NSString *leakOutlookQuirksUserScriptContents()
781 {
782     NSString *scriptPath = [[NSBundle bundleForClass:[WebView class]] pathForResource:@"OutlookQuirksUserScript" ofType:@"js"];
783     NSStringEncoding encoding;
784     return [[NSString alloc] initWithContentsOfFile:scriptPath usedEncoding:&encoding error:0];
785 }
786
787 -(void)_injectOutlookQuirksScript
788 {
789     static NSString *outlookQuirksScriptContents = leakOutlookQuirksUserScriptContents();
790     core(self)->group().addUserScriptToWorld(*core([WebScriptWorld world]),
791         outlookQuirksScriptContents, URL(), Vector<String>(), Vector<String>(), InjectAtDocumentEnd, InjectInAllFrames);
792 }
793 #endif
794
795 static bool shouldRespectPriorityInCSSAttributeSetters()
796 {
797 #if PLATFORM(IOS)
798     static bool isStanzaNeedingAttributeSetterQuirk = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_CSS_ATTRIBUTE_SETTERS_IGNORING_PRIORITY)
799         && [[[NSBundle mainBundle] bundleIdentifier] isEqualToString:@"com.lexcycle.stanza"];
800     return isStanzaNeedingAttributeSetterQuirk;
801 #else
802     static bool isIAdProducerNeedingAttributeSetterQuirk = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_CSS_ATTRIBUTE_SETTERS_IGNORING_PRIORITY)
803         && [[[NSBundle mainBundle] bundleIdentifier] isEqualToString:@"com.apple.iAdProducer"];
804     return isIAdProducerNeedingAttributeSetterQuirk;
805 #endif
806 }
807
808 #if PLATFORM(IOS)
809 static bool shouldTransformsAffectOverflow()
810 {
811     static bool shouldTransformsAffectOverflow = !applicationIsOkCupid() || WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_CSS_TRANSFORMS_AFFECTING_OVERFLOW);
812     return shouldTransformsAffectOverflow;
813 }
814
815 static bool shouldDispatchJavaScriptWindowOnErrorEvents()
816 {
817     static bool shouldDispatchJavaScriptWindowOnErrorEvents = !applicationIsFacebook() || WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_WINDOW_ON_ERROR);
818     return shouldDispatchJavaScriptWindowOnErrorEvents;
819 }
820
821 static bool isInternalInstall()
822 {
823     static bool isInternal = MGGetBoolAnswer(kMGQAppleInternalInstallCapability);
824     return isInternal;
825 }
826
827 static bool didOneTimeInitialization = false;
828 #endif
829
830 static bool shouldUseLegacyBackgroundSizeShorthandBehavior()
831 {
832 #if PLATFORM(IOS)
833     static bool shouldUseLegacyBackgroundSizeShorthandBehavior = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITHOUT_LEGACY_BACKGROUNDSIZE_SHORTHAND_BEHAVIOR);
834 #else
835     static bool shouldUseLegacyBackgroundSizeShorthandBehavior = applicationIsVersions()
836         && !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITHOUT_LEGACY_BACKGROUNDSIZE_SHORTHAND_BEHAVIOR);
837 #endif
838     return shouldUseLegacyBackgroundSizeShorthandBehavior;
839 }
840
841 - (void)_commonInitializationWithFrameName:(NSString *)frameName groupName:(NSString *)groupName
842 {
843     WebCoreThreadViolationCheckRoundTwo();
844
845 #ifndef NDEBUG
846     WTF::RefCountedLeakCounter::suppressMessages(webViewIsOpen);
847 #endif
848     
849     WebPreferences *standardPreferences = [WebPreferences standardPreferences];
850     [standardPreferences willAddToWebView];
851
852     _private->preferences = [standardPreferences retain];
853     _private->mainFrameDocumentReady = NO;
854     _private->drawsBackground = YES;
855 #if !PLATFORM(IOS)
856     _private->backgroundColor = [[NSColor colorWithDeviceWhite:1 alpha:1] retain];
857 #else
858     _private->backgroundColor = CGColorRetain(cachedCGColor(Color::white, ColorSpaceDeviceRGB));
859 #endif
860     _private->includesFlattenedCompositingLayersWhenDrawingToBitmap = YES;
861
862     NSRect f = [self frame];
863     WebFrameView *frameView = [[WebFrameView alloc] initWithFrame: NSMakeRect(0,0,f.size.width,f.size.height)];
864     [frameView setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
865     [self addSubview:frameView];
866     [frameView release];
867
868 #if !PLATFORM(IOS)
869     static bool didOneTimeInitialization = false;
870 #endif
871     if (!didOneTimeInitialization) {
872 #if !LOG_DISABLED
873         WebKitInitializeLoggingChannelsIfNecessary();
874         WebCore::initializeLoggingChannelsIfNecessary();
875 #endif // !LOG_DISABLED
876
877         // Initialize our platform strategies first before invoking the rest
878         // of the initialization code which may depend on the strategies.
879         WebPlatformStrategies::initializeIfNecessary();
880
881 #if ENABLE(SQL_DATABASE)
882 #if PLATFORM(IOS)
883         // Set the WebSQLiteDatabaseTrackerClient.
884         SQLiteDatabaseTracker::setClient(WebSQLiteDatabaseTrackerClient::sharedWebSQLiteDatabaseTrackerClient());
885
886         if ([standardPreferences databasesEnabled])
887 #endif
888         [WebDatabaseManager sharedWebDatabaseManager];
889 #endif
890
891 #if PLATFORM(IOS)        
892         if ([standardPreferences storageTrackerEnabled])
893 #endif
894         WebKitInitializeStorageIfNecessary();
895         WebKitInitializeApplicationCachePathIfNecessary();
896 #if ENABLE(DISK_IMAGE_CACHE) && PLATFORM(IOS)
897         WebKitInitializeWebDiskImageCache();
898 #endif
899         
900         Settings::setDefaultMinDOMTimerInterval(0.004);
901         
902         Settings::setShouldRespectPriorityInCSSAttributeSetters(shouldRespectPriorityInCSSAttributeSetters());
903
904 #if PLATFORM(IOS)
905         if (applicationIsMobileSafari())
906             Settings::setShouldManageAudioSession(true);
907 #endif
908
909         didOneTimeInitialization = true;
910     }
911
912     Page::PageClients pageClients;
913 #if !PLATFORM(IOS)
914     pageClients.chromeClient = new WebChromeClient(self);
915     pageClients.contextMenuClient = new WebContextMenuClient(self);
916 #if ENABLE(DRAG_SUPPORT)
917     pageClients.dragClient = new WebDragClient(self);
918 #endif
919     pageClients.inspectorClient = new WebInspectorClient(self);
920 #else
921     pageClients.chromeClient = new WebChromeClientIOS(self);
922     pageClients.inspectorClient = new WebInspectorClient(self);
923 #endif
924     pageClients.editorClient = new WebEditorClient(self);
925     pageClients.alternativeTextClient = new WebAlternativeTextClient(self);
926     pageClients.loaderClientForMainFrame = new WebFrameLoaderClient;
927     pageClients.progressTrackerClient = new WebProgressTrackerClient(self);
928     _private->page = new Page(pageClients);
929 #if ENABLE(GEOLOCATION)
930     WebCore::provideGeolocationTo(_private->page, new WebGeolocationClient(self));
931 #endif
932 #if ENABLE(NOTIFICATIONS) || ENABLE(LEGACY_NOTIFICATIONS)
933     WebCore::provideNotification(_private->page, new WebNotificationClient(self));
934 #endif
935 #if ENABLE(DEVICE_ORIENTATION)
936 #if !PLATFORM(IOS)
937     WebCore::provideDeviceOrientationTo(_private->page, new WebDeviceOrientationClient(self));
938 #endif
939 #endif
940 #if ENABLE(MEDIA_STREAM)
941     WebCore::provideUserMediaTo(_private->page, new WebUserMediaClient(self));
942 #endif
943
944 #if ENABLE(REMOTE_INSPECTOR)
945     _private->page->setRemoteInspectionAllowed(true);
946 #endif
947
948     _private->page->setCanStartMedia([self window]);
949     _private->page->settings().setLocalStorageDatabasePath([[self preferences] _localStorageDatabasePath]);
950     _private->page->settings().setUseLegacyBackgroundSizeShorthandBehavior(shouldUseLegacyBackgroundSizeShorthandBehavior());
951
952 #if !PLATFORM(IOS)
953     if (needsOutlookQuirksScript()) {
954         _private->page->settings().setShouldInjectUserScriptsInInitialEmptyDocument(true);
955         [self _injectOutlookQuirksScript];
956     }
957 #endif
958
959 #if PLATFORM(IOS)
960     // Preserve the behavior we had before <rdar://problem/7580867>
961     // by enforcing a 5MB limit for session storage.
962     _private->page->settings().setSessionStorageQuota(5 * 1024 * 1024);
963
964     [self _updateScreenScaleFromWindow];
965     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_wakWindowScreenScaleChanged:) name:WAKWindowScreenScaleDidChangeNotification object:nil];
966     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_wakWindowVisibilityChanged:) name:WAKWindowVisibilityDidChangeNotification object:nil];
967     _private->_fixedPositionContent = [[WebFixedPositionContent alloc] initWithWebView:self];
968 #endif
969
970     if ([[NSUserDefaults standardUserDefaults] objectForKey:WebSmartInsertDeleteEnabled])
971         [self setSmartInsertDeleteEnabled:[[NSUserDefaults standardUserDefaults] boolForKey:WebSmartInsertDeleteEnabled]];
972
973     [WebFrame _createMainFrameWithPage:_private->page frameName:frameName frameView:frameView];
974
975 #if !PLATFORM(IOS)
976     NSRunLoop *runLoop = [NSRunLoop mainRunLoop];
977
978     if (WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_LOADING_DURING_COMMON_RUNLOOP_MODES))
979         [self scheduleInRunLoop:runLoop forMode:(NSString *)kCFRunLoopCommonModes];
980     else
981         [self scheduleInRunLoop:runLoop forMode:NSDefaultRunLoopMode];
982 #endif
983
984     [self _addToAllWebViewsSet];
985     [self setGroupName:groupName];
986     
987     // If there's already a next key view (e.g., from a nib), wire it up to our
988     // contained frame view. In any case, wire our next key view up to the our
989     // contained frame view. This works together with our becomeFirstResponder 
990     // and setNextKeyView overrides.
991     NSView *nextKeyView = [self nextKeyView];
992     if (nextKeyView && nextKeyView != frameView)
993         [frameView setNextKeyView:nextKeyView];
994     [super setNextKeyView:frameView];
995
996     if ([[self class] shouldIncludeInWebKitStatistics])
997         ++WebViewCount;
998
999 #if !PLATFORM(IOS)
1000     [self _registerDraggedTypes];
1001 #endif
1002
1003     [self _setIsVisible:[self _isViewVisible]];
1004
1005     WebPreferences *prefs = [self preferences];
1006     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_preferencesChangedNotification:)
1007                                                  name:WebPreferencesChangedInternalNotification object:prefs];
1008
1009 #if !PLATFORM(IOS)
1010     [self _preferencesChanged:[self preferences]];
1011     [[self preferences] _postPreferencesChangedAPINotification];
1012 #else
1013     // do this on the current thread on iOS, since the web thread could be blocked on the main thread,
1014     // and prefs need to be changed synchronously <rdar://problem/5841558>
1015     [self _preferencesChanged:prefs];
1016     _private->page->settings().setFontFallbackPrefersPictographs(true);
1017 #endif
1018
1019     memoryPressureHandler().install();
1020
1021     if (!WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_LOCAL_RESOURCE_SECURITY_RESTRICTION)) {
1022         // Originally, we allowed all local loads.
1023         SecurityPolicy::setLocalLoadPolicy(SecurityPolicy::AllowLocalLoadsForAll);
1024     } else if (!WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_MORE_STRICT_LOCAL_RESOURCE_SECURITY_RESTRICTION)) {
1025         // Later, we allowed local loads for local URLs and documents loaded
1026         // with substitute data.
1027         SecurityPolicy::setLocalLoadPolicy(SecurityPolicy::AllowLocalLoadsForLocalAndSubstituteData);
1028     }
1029
1030 #if !PLATFORM(IOS)
1031     if (!WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITHOUT_CONTENT_SNIFFING_FOR_FILE_URLS))
1032         ResourceHandle::forceContentSniffing();
1033 #endif
1034
1035 #if USE(GLIB)
1036     [self _scheduleGlibContextIterations];
1037 #endif
1038 }
1039
1040 - (id)_initWithFrame:(NSRect)f frameName:(NSString *)frameName groupName:(NSString *)groupName usesDocumentViews:(BOOL)usesDocumentViews
1041 {
1042     // FIXME: Remove the usesDocumentViews parameter; it's only here for compatibility with WebKit nightly builds
1043     // running against Safari 5 on Leopard.
1044     ASSERT(usesDocumentViews);
1045
1046     self = [super initWithFrame:f];
1047     if (!self)
1048         return nil;
1049
1050 #ifdef ENABLE_WEBKIT_UNSET_DYLD_FRAMEWORK_PATH
1051     // DYLD_FRAMEWORK_PATH is used so Safari will load the development version of WebKit, which
1052     // may not work with other WebKit applications.  Unsetting DYLD_FRAMEWORK_PATH removes the
1053     // need for Safari to unset it to prevent it from being passed to applications it launches.
1054     // Unsetting it when a WebView is first created is as good a place as any.
1055     // See <http://bugs.webkit.org/show_bug.cgi?id=4286> for more details.
1056     if (getenv("WEBKIT_UNSET_DYLD_FRAMEWORK_PATH")) {
1057         unsetenv("DYLD_FRAMEWORK_PATH");
1058         unsetenv("WEBKIT_UNSET_DYLD_FRAMEWORK_PATH");
1059     }
1060 #endif
1061
1062     _private = [[WebViewPrivate alloc] init];
1063     [self _commonInitializationWithFrameName:frameName groupName:groupName];
1064     [self setMaintainsBackForwardList: YES];
1065 #if !PLATFORM(IOS)
1066     _private->page->setDeviceScaleFactor([self _deviceScaleFactor]);
1067 #endif
1068     return self;
1069 }
1070
1071 - (void)_viewWillDrawInternal
1072 {
1073     Frame* frame = [self _mainCoreFrame];
1074     if (frame && frame->view())
1075         frame->view()->updateLayoutAndStyleIfNeededRecursive();
1076 }
1077
1078 + (NSArray *)_supportedMIMETypes
1079 {
1080     // Load the plug-in DB allowing plug-ins to install types.
1081     [WebPluginDatabase sharedDatabase];
1082     return [[WebFrameView _viewTypesAllowImageTypeOmission:NO] allKeys];
1083 }
1084
1085 #if !PLATFORM(IOS)
1086 + (NSArray *)_supportedFileExtensions
1087 {
1088     NSMutableSet *extensions = [[NSMutableSet alloc] init];
1089     NSArray *MIMETypes = [self _supportedMIMETypes];
1090     NSEnumerator *enumerator = [MIMETypes objectEnumerator];
1091     NSString *MIMEType;
1092     while ((MIMEType = [enumerator nextObject]) != nil) {
1093         NSArray *extensionsForType = WKGetExtensionsForMIMEType(MIMEType);
1094         if (extensionsForType) {
1095             [extensions addObjectsFromArray:extensionsForType];
1096         }
1097     }
1098     NSArray *uniqueExtensions = [extensions allObjects];
1099     [extensions release];
1100     return uniqueExtensions;
1101 }
1102 #endif
1103
1104 #if PLATFORM(IOS)
1105 + (void)enableWebThread
1106 {
1107     static BOOL isWebThreadEnabled = NO;
1108     if (!isWebThreadEnabled) {
1109         WebCoreObjCDeallocOnWebThread([WebBasePluginPackage class]);
1110         WebCoreObjCDeallocOnWebThread([WebDataSource class]);
1111         WebCoreObjCDeallocOnWebThread([WebFrame class]);
1112         WebCoreObjCDeallocOnWebThread([WebHTMLView class]);
1113         WebCoreObjCDeallocOnWebThread([WebHistoryItem class]);
1114         WebCoreObjCDeallocOnWebThread([WebPlainWhiteView class]);
1115         WebCoreObjCDeallocOnWebThread([WebPolicyDecisionListener class]);
1116         WebCoreObjCDeallocOnWebThread([WebView class]);
1117         WebCoreObjCDeallocOnWebThread([WebVisiblePosition class]);
1118         if (applicationIsTheEconomistOnIPhone() && !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_DELEGATE_CALLS_IN_COMMON_RUNLOOP_MODES))
1119             WebThreadSetDelegateSourceRunLoopMode(kCFRunLoopDefaultMode);
1120         WebThreadEnable();
1121         isWebThreadEnabled = YES;
1122     }
1123 }
1124
1125 - (id)initSimpleHTMLDocumentWithStyle:(NSString *)style frame:(CGRect)frame preferences:(WebPreferences *)preferences groupName:(NSString *)groupName
1126 {
1127     self = [super initWithFrame:frame];
1128     if (!self)
1129         return nil;
1130     
1131     _private = [[WebViewPrivate alloc] init];
1132     
1133 #ifndef NDEBUG
1134     WTF::RefCountedLeakCounter::suppressMessages(webViewIsOpen);
1135 #endif
1136     
1137     if (!preferences)
1138         preferences = [WebPreferences standardPreferences];
1139     [preferences willAddToWebView];
1140     
1141     _private->preferences = [preferences retain];
1142     _private->mainFrameDocumentReady = NO;
1143     _private->drawsBackground = YES;
1144     _private->backgroundColor = CGColorRetain(cachedCGColor(Color::white, ColorSpaceDeviceRGB));
1145     
1146     WebFrameView *frameView = nil;
1147     frameView = [[WebFrameView alloc] initWithFrame: CGRectMake(0,0,frame.size.width,frame.size.height)];
1148     [frameView setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
1149     [self addSubview:frameView];
1150     [frameView release];
1151
1152     
1153     Page::PageClients pageClients;
1154     pageClients.chromeClient = new WebChromeClientIOS(self);
1155 #if ENABLE(DRAG_SUPPORT)
1156     pageClients.dragClient = new WebDragClient(self);
1157 #endif
1158     pageClients.editorClient = new WebEditorClient(self);
1159     pageClients.inspectorClient = new WebInspectorClient(self);
1160     pageClients.loaderClientForMainFrame = new WebFrameLoaderClient;
1161     pageClients.progressTrackerClient = new WebProgressTrackerClient(self);
1162     _private->page = new Page(pageClients);
1163     
1164     [self setSmartInsertDeleteEnabled:YES];
1165     
1166     // FIXME: <rdar://problem/6851451> Should respect preferences in fast path WebView initialization
1167     // We are ignoring the preferences object on fast path and just using Settings defaults (everything fancy off).
1168     // This matches how UIKit sets up the preferences. We need to set  default values for fonts though, <rdar://problem/6850611>.
1169     // This should be revisited later. There is some risk involved, _preferencesChanged used to show up badly in Shark.
1170     _private->page->settings().setMinimumLogicalFontSize(9);
1171     _private->page->settings().setDefaultFontSize([_private->preferences defaultFontSize]);
1172     _private->page->settings().setDefaultFixedFontSize(13);
1173     _private->page->settings().setDownloadableBinaryFontsEnabled(false);
1174     _private->page->settings().setAcceleratedDrawingEnabled([preferences acceleratedDrawingEnabled]);
1175     _private->page->settings().setScreenFontSubstitutionEnabled(false);
1176     
1177     // FIXME: <rdar://problem/7394370> Always use primary font baseline in text field base line calculation, ignore fallback fonts.
1178     _private->page->settings().setAlwaysUseBaselineOfPrimaryFont([preferences _alwaysUseBaselineOfPrimaryFont]);
1179
1180     _private->page->settings().setFontFallbackPrefersPictographs(true);
1181     _private->page->settings().setPictographFontFamily("AppleColorEmoji");
1182     
1183     // FIXME: this is a workaround for <rdar://problem/11518688> REGRESSION: Quoted text font changes when replying to certain email
1184     _private->page->settings().setStandardFontFamily([_private->preferences standardFontFamily]);
1185     
1186     // FIXME: this is a workaround for <rdar://problem/11820090> Quoted text changes in size when replying to certain email
1187     _private->page->settings().setMinimumFontSize([_private->preferences minimumFontSize]);
1188
1189     [self setGroupName:groupName];
1190
1191 #if ENABLE(REMOTE_INSPECTOR)
1192     // Production installs always disallow debugging simple HTML documents.
1193     // Internal installs allow debugging simple HTML documents (TextFields) if the Internal Setting is enabled.
1194     if (!isInternalInstall())
1195         _private->page->setRemoteInspectionAllowed(false);
1196     else {
1197         static BOOL textFieldInspectionEnabled = [[NSUserDefaults standardUserDefaults] boolForKey:WebKitTextFieldRemoteInspectionEnabledPreferenceKey];
1198         _private->page->setRemoteInspectionAllowed(textFieldInspectionEnabled);
1199     }
1200 #endif
1201     
1202     [self _updateScreenScaleFromWindow];
1203     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_wakWindowScreenScaleChanged:) name:WAKWindowScreenScaleDidChangeNotification object:nil];
1204     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_wakWindowVisibilityChanged:) name:WAKWindowVisibilityDidChangeNotification object:nil];
1205
1206     [WebFrame _createMainFrameWithSimpleHTMLDocumentWithPage:_private->page frameView:frameView style:style];
1207     
1208     [self _addToAllWebViewsSet];
1209     
1210     ++WebViewCount;
1211     
1212     SecurityPolicy::setLocalLoadPolicy(SecurityPolicy::AllowLocalLoadsForLocalAndSubstituteData);
1213     
1214     return self;
1215 }
1216
1217 + (void)_handleMemoryWarning
1218 {
1219     ASSERT(WebThreadIsCurrent());
1220     WebKit::MemoryMeasure totalMemory("Memory warning: Overall memory change from [WebView _handleMemoryWarning].");
1221
1222     // Always peform the following.
1223     [WebView purgeInactiveFontData];
1224
1225     // Only perform the remaining if a non-simple document was created.
1226     if (!didOneTimeInitialization)
1227         return;
1228
1229     tileControllerMemoryHandler().trimUnparentedTilesToTarget(0);
1230
1231 #if ENABLE(DISK_IMAGE_CACHE)
1232     {
1233         WebKit::MemoryMeasure measurer("Memory warning: flushing images to disk.");
1234         WebCore::memoryCache()->flushCachedImagesToDisk();
1235     }
1236 #endif
1237
1238     [WebStorageManager closeIdleLocalStorageDatabases];
1239
1240     [WebView _releaseMemoryNow];
1241 }
1242
1243 + (void)registerForMemoryNotifications
1244 {
1245     BOOL shouldAutoClearPressureOnMemoryRelease = !WebCore::applicationIsMobileSafari();
1246
1247     memoryPressureHandler().installMemoryReleaseBlock(^{
1248         [WebView _handleMemoryWarning];
1249     }, shouldAutoClearPressureOnMemoryRelease);
1250
1251 #if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
1252     static dispatch_source_t memoryNotificationEventSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_MEMORYSTATUS, 0, DISPATCH_MEMORYSTATUS_PRESSURE_WARN, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0));
1253 #else
1254     static dispatch_source_t memoryNotificationEventSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_VM, 0, DISPATCH_VM_PRESSURE, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0));
1255 #endif
1256     dispatch_source_set_event_handler(memoryNotificationEventSource, ^{
1257         // Set memory pressure flag and schedule releasing memory in web thread runloop exit.
1258         memoryPressureHandler().setReceivedMemoryPressure(WebCore::MemoryPressureReasonVMPressure);
1259     });
1260
1261     dispatch_resume(memoryNotificationEventSource);
1262
1263     if (!shouldAutoClearPressureOnMemoryRelease) {
1264         // Listen to memory status notification to reset the memory pressure flag.
1265         static dispatch_source_t memoryStatusEventSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_MEMORYSTATUS,
1266                                                                                     0,
1267                                                                                     DISPATCH_MEMORYSTATUS_PRESSURE_WARN | DISPATCH_MEMORYSTATUS_PRESSURE_NORMAL,
1268                                                                                     dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0));
1269         dispatch_source_set_event_handler(memoryStatusEventSource, ^{
1270             unsigned long currentStatus = dispatch_source_get_data(memoryStatusEventSource);
1271             if (currentStatus == DISPATCH_MEMORYSTATUS_PRESSURE_NORMAL)
1272                 memoryPressureHandler().clearMemoryPressure();
1273             else if (currentStatus == DISPATCH_MEMORYSTATUS_PRESSURE_WARN)
1274                 memoryPressureHandler().setReceivedMemoryPressure(WebCore::MemoryPressureReasonVMStatus);
1275         });
1276
1277         dispatch_resume(memoryStatusEventSource);
1278     }
1279 }
1280
1281 + (void)_releaseMemoryNow
1282 {
1283     ASSERT(WebThreadIsCurrent());
1284     [WebView discardAllCompiledCode];
1285     [WebView garbageCollectNow];
1286     [WebView purgeInactiveFontData];
1287     [WebView drainLayerPool];
1288     [WebCache emptyInMemoryResources];
1289     [WebView releaseFastMallocMemoryOnCurrentThread];
1290
1291     dispatch_async(dispatch_get_main_queue(), ^{
1292         // Clear the main thread's TCMalloc thread cache.
1293         [WebView releaseFastMallocMemoryOnCurrentThread];
1294     });
1295 }
1296
1297 + (void)_clearPrivateBrowsingSessionCookieStorage
1298 {
1299     WebFrameNetworkingContext::clearPrivateBrowsingSessionCookieStorage();
1300 }
1301
1302 - (void)_replaceCurrentHistoryItem:(WebHistoryItem *)item
1303 {
1304     Frame* frame = [self _mainCoreFrame];
1305     if (frame)
1306         frame->loader().history().replaceCurrentItem(core(item));
1307 }
1308
1309 + (void)willEnterBackgroundWithCompletionHandler:(void(^)(void))handler
1310 {
1311     WebThreadRun(^{
1312         [WebView _releaseMemoryNow];
1313         dispatch_async(dispatch_get_main_queue(), handler);
1314     });
1315 }
1316
1317 + (void)releaseFastMallocMemoryOnCurrentThread
1318 {
1319     WebKit::MemoryMeasure measurer("Memory warning: Releasing fast malloc memory to system.");
1320     WTF::releaseFastMallocFreeMemory();
1321 }
1322
1323 + (void)garbageCollectNow
1324 {
1325     ASSERT(WebThreadIsCurrent());
1326     WebKit::MemoryMeasure measurer("Memory warning: Calling JavaScript GC.");
1327     gcController().garbageCollectNow();
1328 }
1329
1330 + (void)purgeInactiveFontData
1331 {
1332     ASSERT(WebThreadIsCurrent());
1333     WebKit::MemoryMeasure measurer("Memory warning: Purging inactive font data.");
1334     fontCache().purgeInactiveFontData();
1335 }
1336
1337 + (void)drainLayerPool
1338 {
1339     ASSERT(WebThreadIsCurrent());
1340     WebKit::MemoryMeasure measurer("Memory warning: Draining layer pool.");
1341     WebCore::LegacyTileCache::drainLayerPool();
1342 }
1343
1344 + (void)discardAllCompiledCode
1345 {
1346     ASSERT(WebThreadIsCurrent());
1347     WebKit::MemoryMeasure measurer("Memory warning: Discarding JIT'ed code.");
1348     gcController().discardAllCompiledCode();
1349 }
1350
1351 + (BOOL)isCharacterSmartReplaceExempt:(unichar)character isPreviousCharacter:(BOOL)b
1352 {
1353     return WebCore::isCharacterSmartReplaceExempt(character, b);
1354 }
1355
1356 - (void)updateLayoutIgnorePendingStyleSheets
1357 {
1358     WebThreadRun(^{
1359         for (Frame* frame = [self _mainCoreFrame]; frame; frame = frame->tree().traverseNext()) {
1360             Document *document = frame->document();
1361             if (document)
1362                 document->updateLayoutIgnorePendingStylesheets();
1363         }
1364     });
1365 }
1366 #endif // PLATFORM(IOS)
1367
1368 static NSMutableSet *knownPluginMIMETypes()
1369 {
1370     static NSMutableSet *mimeTypes = [[NSMutableSet alloc] init];
1371     
1372     return mimeTypes;
1373 }
1374
1375 + (void)_registerPluginMIMEType:(NSString *)MIMEType
1376 {
1377     [WebView registerViewClass:[WebHTMLView class] representationClass:[WebHTMLRepresentation class] forMIMEType:MIMEType];
1378     [knownPluginMIMETypes() addObject:MIMEType];
1379 }
1380
1381 + (void)_unregisterPluginMIMEType:(NSString *)MIMEType
1382 {
1383     [self _unregisterViewClassAndRepresentationClassForMIMEType:MIMEType];
1384     [knownPluginMIMETypes() removeObject:MIMEType];
1385 }
1386
1387 + (BOOL)_viewClass:(Class *)vClass andRepresentationClass:(Class *)rClass forMIMEType:(NSString *)MIMEType allowingPlugins:(BOOL)allowPlugins
1388 {
1389     MIMEType = [MIMEType lowercaseString];
1390     Class viewClass = [[WebFrameView _viewTypesAllowImageTypeOmission:YES] _webkit_objectForMIMEType:MIMEType];
1391     Class repClass = [[WebDataSource _repTypesAllowImageTypeOmission:YES] _webkit_objectForMIMEType:MIMEType];
1392
1393 #if PLATFORM(IOS)
1394 #define WebPDFView ([WebView _getPDFViewClass])
1395 #endif
1396     if (!viewClass || !repClass || [[WebPDFView supportedMIMETypes] containsObject:MIMEType]) {
1397 #if PLATFORM(IOS)
1398 #undef WebPDFView
1399 #endif
1400         // Our optimization to avoid loading the plug-in DB and image types for the HTML case failed.
1401
1402         if (allowPlugins) {
1403             // Load the plug-in DB allowing plug-ins to install types.
1404             [WebPluginDatabase sharedDatabase];
1405         }
1406
1407         // Load the image types and get the view class and rep class. This should be the fullest picture of all handled types.
1408         viewClass = [[WebFrameView _viewTypesAllowImageTypeOmission:NO] _webkit_objectForMIMEType:MIMEType];
1409         repClass = [[WebDataSource _repTypesAllowImageTypeOmission:NO] _webkit_objectForMIMEType:MIMEType];
1410     }
1411     
1412     if (viewClass && repClass) {
1413         if (viewClass == [WebHTMLView class] && repClass == [WebHTMLRepresentation class]) {
1414             // Special-case WebHTMLView for text types that shouldn't be shown.
1415             if ([[WebHTMLView unsupportedTextMIMETypes] containsObject:MIMEType])
1416                 return NO;
1417
1418             // If the MIME type is a known plug-in we might not want to load it.
1419             if (!allowPlugins && [knownPluginMIMETypes() containsObject:MIMEType]) {
1420                 BOOL isSupportedByWebKit = [[WebHTMLView supportedNonImageMIMETypes] containsObject:MIMEType] ||
1421                     [[WebHTMLView supportedMIMETypes] containsObject:MIMEType];
1422                 
1423                 // If this is a known plug-in MIME type and WebKit can't show it natively, we don't want to show it.
1424                 if (!isSupportedByWebKit)
1425                     return NO;
1426             }
1427         }
1428         if (vClass)
1429             *vClass = viewClass;
1430         if (rClass)
1431             *rClass = repClass;
1432         return YES;
1433     }
1434     
1435     return NO;
1436 }
1437
1438 - (BOOL)_viewClass:(Class *)vClass andRepresentationClass:(Class *)rClass forMIMEType:(NSString *)MIMEType
1439 {
1440     if ([[self class] _viewClass:vClass andRepresentationClass:rClass forMIMEType:MIMEType allowingPlugins:[_private->preferences arePlugInsEnabled]])
1441         return YES;
1442 #if !PLATFORM(IOS)
1443     if (_private->pluginDatabase) {
1444         WebBasePluginPackage *pluginPackage = [_private->pluginDatabase pluginForMIMEType:MIMEType];
1445         if (pluginPackage) {
1446             if (vClass)
1447                 *vClass = [WebHTMLView class];
1448             if (rClass)
1449                 *rClass = [WebHTMLRepresentation class];
1450             return YES;
1451         }
1452     }
1453 #endif
1454     return NO;
1455 }
1456
1457 #if !PLATFORM(IOS)
1458 + (void)_setAlwaysUseATSU:(BOOL)f
1459 {
1460     [self _setAlwaysUsesComplexTextCodePath:f];
1461 }
1462 #endif
1463
1464 + (void)_setAlwaysUsesComplexTextCodePath:(BOOL)f
1465 {
1466     Font::setCodePath(f ? Font::Complex : Font::Auto);
1467 }
1468
1469 + (void)_setAllowsRoundingHacks:(BOOL)allowsRoundingHacks
1470 {
1471     TextRun::setAllowsRoundingHacks(allowsRoundingHacks);
1472 }
1473
1474 + (BOOL)_allowsRoundingHacks
1475 {
1476     return TextRun::allowsRoundingHacks();
1477 }
1478
1479 + (BOOL)canCloseAllWebViews
1480 {
1481     return DOMWindow::dispatchAllPendingBeforeUnloadEvents();
1482 }
1483
1484 + (void)closeAllWebViews
1485 {
1486     DOMWindow::dispatchAllPendingUnloadEvents();
1487
1488     // This will close the WebViews in a random order. Change this if close order is important.
1489     // Make a new set to avoid mutating the set we are enumerating.
1490     NSSet *webViewsToClose = [NSSet setWithSet:(NSSet *)allWebViewsSet]; 
1491     NSEnumerator *enumerator = [webViewsToClose objectEnumerator];
1492     while (WebView *webView = [enumerator nextObject])
1493         [webView close];
1494 }
1495
1496 + (BOOL)canShowFile:(NSString *)path
1497 {
1498     return [[self class] canShowMIMEType:[WebView _MIMETypeForFile:path]];
1499 }
1500
1501 #if !PLATFORM(IOS)
1502 + (NSString *)suggestedFileExtensionForMIMEType:(NSString *)type
1503 {
1504     return WKGetPreferredExtensionForMIMEType(type);
1505 }
1506 #endif
1507
1508 - (BOOL)_isClosed
1509 {
1510     return !_private || _private->closed;
1511 }
1512
1513 #if PLATFORM(IOS)
1514 - (void)_dispatchUnloadEvent
1515 {
1516     WebThreadRun(^{
1517         WebFrame *mainFrame = [self mainFrame];
1518         Frame *coreMainFrame = core(mainFrame);
1519         if (coreMainFrame) {
1520             Document *document = coreMainFrame->document();
1521             if (document)
1522                 document->dispatchWindowEvent(Event::create(eventNames().unloadEvent, false, false));
1523         }
1524     });
1525 }
1526
1527 - (DOMCSSStyleDeclaration *)styleAtSelectionStart
1528 {
1529     WebFrame *mainFrame = [self mainFrame];
1530     Frame *coreMainFrame = core(mainFrame);
1531     if (!coreMainFrame)
1532         return nil;
1533     return coreMainFrame->styleAtSelectionStart();
1534 }
1535
1536 - (NSUInteger)_renderTreeSize
1537 {
1538     if (!_private->page)
1539         return 0;
1540     return _private->page->renderTreeSize();
1541 }
1542
1543 - (void)_dispatchTileDidDraw:(CALayer*)tile
1544 {
1545     id mailDelegate = [self _webMailDelegate];
1546     if ([mailDelegate respondsToSelector:@selector(_webthread_webView:tileDidDraw:)]) {
1547         [mailDelegate _webthread_webView:self tileDidDraw:tile];
1548         return;
1549     }
1550
1551     if (!OSAtomicCompareAndSwap32(0, 1, &_private->didDrawTiles))
1552         return;
1553
1554     WebThreadLock();
1555
1556     [[[self _UIKitDelegateForwarder] asyncForwarder] webViewDidDrawTiles:self];
1557 }
1558
1559 - (void)_willStartScrollingOrZooming
1560 {
1561     // Pause timers during top level interaction
1562     if (_private->mainViewIsScrollingOrZooming)
1563         return;
1564     _private->mainViewIsScrollingOrZooming = YES;
1565
1566     // This suspends active DOM objects like timers, but not media.
1567     [[self mainFrame] setTimeoutsPaused:YES];
1568
1569     // This defers loading callbacks only.
1570     // WARNING: This behavior could change if Bug 49401 lands in open source WebKit again.
1571     [self setDefersCallbacks:YES];
1572 }
1573
1574 - (void)_didFinishScrollingOrZooming
1575 {
1576     if (!_private->mainViewIsScrollingOrZooming)
1577         return;
1578     _private->mainViewIsScrollingOrZooming = NO;
1579     [self setDefersCallbacks:NO];
1580     [[self mainFrame] setTimeoutsPaused:NO];
1581     FrameView* view = [self _mainCoreFrame]->view();
1582     if (view && view->renderView())
1583         view->renderView()->resumePausedImageAnimationsIfNeeded();
1584 }
1585
1586 - (void)_setResourceLoadSchedulerSuspended:(BOOL)suspend
1587 {
1588     if (suspend)
1589         resourceLoadScheduler()->suspendPendingRequests();
1590     else
1591         resourceLoadScheduler()->resumePendingRequests();
1592 }
1593
1594 + (void)_setAcceleratedImageDecoding:(BOOL)enabled
1595 {
1596     UNUSED_PARAM(enabled);
1597 }
1598
1599 + (void)_setAllowCookies:(BOOL)allow
1600 {
1601     ResourceRequestBase::setDefaultAllowCookies(allow);
1602 }
1603
1604 + (BOOL)_allowCookies
1605 {
1606     return ResourceRequestBase::defaultAllowCookies();
1607 }
1608
1609 + (BOOL)_isUnderMemoryPressure
1610 {
1611     return memoryPressureHandler().isUnderMemoryPressure();
1612 }
1613
1614 + (void)_clearMemoryPressure
1615 {
1616     memoryPressureHandler().clearMemoryPressure();
1617 }
1618
1619 + (BOOL)_shouldWaitForMemoryClearMessage
1620 {
1621     return memoryPressureHandler().shouldWaitForMemoryClearMessage();
1622 }
1623 #endif // PLATFORM(IOS)
1624
1625 - (void)_closePluginDatabases
1626 {
1627     pluginDatabaseClientCount--;
1628
1629     // Close both sets of plug-in databases because plug-ins need an opportunity to clean up files, etc.
1630
1631 #if !PLATFORM(IOS)
1632     // Unload the WebView local plug-in database. 
1633     if (_private->pluginDatabase) {
1634         [_private->pluginDatabase destroyAllPluginInstanceViews];
1635         [_private->pluginDatabase close];
1636         [_private->pluginDatabase release];
1637         _private->pluginDatabase = nil;
1638     }
1639 #endif
1640     
1641     // Keep the global plug-in database active until the app terminates to avoid having to reload plug-in bundles.
1642     if (!pluginDatabaseClientCount && applicationIsTerminating)
1643         [WebPluginDatabase closeSharedDatabase];
1644 }
1645
1646 - (void)_closeWithFastTeardown 
1647 {
1648 #ifndef NDEBUG
1649     WTF::RefCountedLeakCounter::suppressMessages("At least one WebView was closed with fast teardown.");
1650 #endif
1651
1652 #if !PLATFORM(IOS)
1653     [[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
1654 #endif
1655     [[NSNotificationCenter defaultCenter] removeObserver:self];
1656
1657     [self _closePluginDatabases];
1658 }
1659
1660 static bool fastDocumentTeardownEnabled()
1661 {
1662 #ifdef NDEBUG
1663     static bool enabled = ![[NSUserDefaults standardUserDefaults] boolForKey:WebKitEnableFullDocumentTeardownPreferenceKey];
1664 #else
1665     static bool initialized = false;
1666     static bool enabled = false;
1667     if (!initialized) {
1668         // This allows debug builds to default to not have fast teardown, so leak checking still works.
1669         // But still allow the WebKitEnableFullDocumentTeardown default to override it if present.
1670         NSNumber *setting = [[NSUserDefaults standardUserDefaults] objectForKey:WebKitEnableFullDocumentTeardownPreferenceKey];
1671         if (setting)
1672             enabled = ![setting boolValue];
1673         initialized = true;
1674     }
1675 #endif
1676     return enabled;
1677 }
1678
1679 // _close is here only for backward compatibility; clients and subclasses should use
1680 // public method -close instead.
1681 - (void)_close
1682 {
1683 #if PLATFORM(IOS)
1684     // Always clear delegates on calling thread, becasue caller can deallocate delegates right after calling -close
1685     // (and could in fact already be in delegate's -dealloc method, as seen in <rdar://problem/11540972>).
1686
1687     [self _clearDelegates];
1688
1689     // Fix for problems such as <rdar://problem/5774587> Crash closing tab in WebCore::Frame::page() from -[WebCoreFrameBridge pauseTimeouts]
1690     WebThreadRun(^{
1691 #endif            
1692
1693     if (!_private || _private->closed)
1694         return;
1695
1696     [[NSNotificationCenter defaultCenter] postNotificationName:WebViewWillCloseNotification object:self];
1697
1698     _private->closed = YES;
1699     [self _removeFromAllWebViewsSet];
1700
1701 #ifndef NDEBUG
1702     WTF::RefCountedLeakCounter::cancelMessageSuppression(webViewIsOpen);
1703 #endif
1704
1705     // To quit the apps fast we skip document teardown, except plugins
1706     // need to be destroyed and unloaded.
1707     if (applicationIsTerminating && fastDocumentTeardownEnabled()) {
1708         [self _closeWithFastTeardown];
1709         return;
1710     }
1711
1712 #if ENABLE(VIDEO) && !PLATFORM(IOS)
1713     [self _exitFullscreen];
1714 #endif
1715
1716 #if PLATFORM(IOS)
1717     _private->closing = YES;
1718 #endif
1719
1720     if (Frame* mainFrame = [self _mainCoreFrame])
1721         mainFrame->loader().detachFromParent();
1722
1723     [self setHostWindow:nil];
1724
1725 #if !PLATFORM(IOS)
1726     [self setDownloadDelegate:nil];
1727     [self setEditingDelegate:nil];
1728     [self setFrameLoadDelegate:nil];
1729     [self setPolicyDelegate:nil];
1730     [self setResourceLoadDelegate:nil];
1731     [self setScriptDebugDelegate:nil];
1732     [self setUIDelegate:nil];
1733
1734     [_private->inspector webViewClosed];
1735 #endif
1736
1737 #if !PLATFORM(IOS)
1738     // To avoid leaks, call removeDragCaret in case it wasn't called after moveDragCaretToPoint.
1739     [self removeDragCaret];
1740 #endif
1741
1742     _private->group->removeWebView(self);
1743
1744     // Deleteing the WebCore::Page will clear the page cache so we call destroy on
1745     // all the plug-ins in the page cache to break any retain cycles.
1746     // See comment in HistoryItem::releaseAllPendingPageCaches() for more information.
1747     Page* page = _private->page;
1748     _private->page = 0;
1749     delete page;
1750
1751 #if !PLATFORM(IOS)
1752     if (_private->hasSpellCheckerDocumentTag) {
1753         [[NSSpellChecker sharedSpellChecker] closeSpellDocumentWithTag:_private->spellCheckerDocumentTag];
1754         _private->hasSpellCheckerDocumentTag = NO;
1755     }
1756 #endif
1757
1758     if (_private->layerFlushController) {
1759         _private->layerFlushController->invalidate();
1760         _private->layerFlushController = nullptr;
1761     }
1762     
1763 #if USE(GLIB)
1764     [self _clearGlibLoopObserver];
1765 #endif
1766
1767     [[self _notificationProvider] unregisterWebView:self];
1768
1769 #if !PLATFORM(IOS)
1770     [[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
1771 #endif
1772     [[NSNotificationCenter defaultCenter] removeObserver:self];
1773
1774     [WebPreferences _removeReferenceForIdentifier:[self preferencesIdentifier]];
1775
1776     WebPreferences *preferences = _private->preferences;
1777     _private->preferences = nil;
1778     [preferences didRemoveFromWebView];
1779     [preferences release];
1780
1781     [self _closePluginDatabases];
1782
1783 #ifndef NDEBUG
1784     // Need this to make leak messages accurate.
1785     if (applicationIsTerminating) {
1786         gcController().garbageCollectNow();
1787         [WebCache setDisabled:YES];
1788     }
1789 #endif
1790 #if PLATFORM(IOS)
1791     // Fix for problems such as <rdar://problem/5774587> Crash closing tab in WebCore::Frame::page() from -[WebCoreFrameBridge pauseTimeouts]
1792     });
1793 #endif            
1794 }
1795
1796 // Indicates if the WebView is in the midst of a user gesture.
1797 - (BOOL)_isProcessingUserGesture
1798 {
1799     return ScriptController::processingUserGesture();
1800 }
1801
1802 + (NSString *)_MIMETypeForFile:(NSString *)path
1803 {
1804 #if !PLATFORM(IOS)
1805     NSString *extension = [path pathExtension];
1806 #endif
1807     NSString *MIMEType = nil;
1808
1809 #if !PLATFORM(IOS)
1810     // Get the MIME type from the extension.
1811     if ([extension length] != 0) {
1812         MIMEType = WKGetMIMETypeForExtension(extension);
1813     }
1814 #endif
1815
1816     // If we can't get a known MIME type from the extension, sniff.
1817     if ([MIMEType length] == 0 || [MIMEType isEqualToString:@"application/octet-stream"]) {
1818         NSFileHandle *handle = [NSFileHandle fileHandleForReadingAtPath:path];
1819         NSData *data = [handle readDataOfLength:WEB_GUESS_MIME_TYPE_PEEK_LENGTH];
1820         [handle closeFile];
1821         if ([data length] != 0) {
1822             MIMEType = [data _webkit_guessedMIMEType];
1823         }
1824         if ([MIMEType length] == 0) {
1825             MIMEType = @"application/octet-stream";
1826         }
1827     }
1828
1829     return MIMEType;
1830 }
1831
1832 - (WebDownload *)_downloadURL:(NSURL *)URL
1833 {
1834     ASSERT(URL);
1835     
1836     NSURLRequest *request = [[NSURLRequest alloc] initWithURL:URL];
1837     WebDownload *download = [WebDownload _downloadWithRequest:request
1838                                                      delegate:_private->downloadDelegate
1839                                                     directory:nil];
1840     [request release];
1841     
1842     return download;
1843 }
1844
1845 - (WebView *)_openNewWindowWithRequest:(NSURLRequest *)request
1846 {
1847     NSDictionary *features = [[NSDictionary alloc] init];
1848     WebView *newWindowWebView = [[self _UIDelegateForwarder] webView:self
1849                                             createWebViewWithRequest:nil
1850                                                       windowFeatures:features];
1851     [features release];
1852     if (!newWindowWebView)
1853         return nil;
1854
1855     CallUIDelegate(newWindowWebView, @selector(webViewShow:));
1856     return newWindowWebView;
1857 }
1858
1859 - (WebInspector *)inspector
1860 {
1861     if (!_private->inspector)
1862         _private->inspector = [[WebInspector alloc] initWithWebView:self];
1863     return _private->inspector;
1864 }
1865
1866 #if ENABLE(REMOTE_INSPECTOR)
1867 + (void)_enableRemoteInspector
1868 {
1869     RemoteInspector::shared().start();
1870 }
1871
1872 + (void)_disableRemoteInspector
1873 {
1874     RemoteInspector::shared().stop();
1875 }
1876
1877 + (void)_disableAutoStartRemoteInspector
1878 {
1879     RemoteInspector::startDisabled();
1880 }
1881
1882 + (BOOL)_isRemoteInspectorEnabled
1883 {
1884     return RemoteInspector::shared().enabled();
1885 }
1886
1887 + (BOOL)_hasRemoteInspectorSession
1888 {
1889     return RemoteInspector::shared().hasActiveDebugSession();
1890 }
1891
1892 - (BOOL)allowsRemoteInspection
1893 {
1894     return _private->page->remoteInspectionAllowed();
1895 }
1896
1897 - (void)setAllowsRemoteInspection:(BOOL)allow
1898 {
1899     _private->page->setRemoteInspectionAllowed(allow);
1900 }
1901
1902 - (void)setShowingInspectorIndication:(BOOL)showing
1903 {
1904 #if PLATFORM(IOS)
1905     ASSERT(WebThreadIsLocked());
1906
1907     if (showing) {
1908         if (!_private->indicateLayer) {
1909             _private->indicateLayer = [[WebIndicateLayer alloc] initWithWebView:self];
1910             [_private->indicateLayer setNeedsLayout];
1911             [[[self window] hostLayer] addSublayer:_private->indicateLayer];
1912         }
1913     } else {
1914         [_private->indicateLayer removeFromSuperlayer];
1915         [_private->indicateLayer release];
1916         _private->indicateLayer = nil;
1917     }
1918 #else
1919     // Implemented in WebCore::InspectorOverlay.
1920 #endif
1921 }
1922
1923 #if PLATFORM(IOS)
1924 - (void)_setHostApplicationProcessIdentifier:(pid_t)pid auditToken:(audit_token_t)auditToken
1925 {
1926     RetainPtr<CFDataRef> auditData = adoptCF(CFDataCreate(nullptr, (const UInt8*)&auditToken, sizeof(auditToken)));
1927     RemoteInspector::shared().setParentProcessInformation(pid, auditData);
1928 }
1929 #endif // PLATFORM(IOS)
1930 #endif // ENABLE(REMOTE_INSPECTOR)
1931
1932 - (WebCore::Page*)page
1933 {
1934     return _private->page;
1935 }
1936
1937 #if !PLATFORM(IOS)
1938 - (NSMenu *)_menuForElement:(NSDictionary *)element defaultItems:(NSArray *)items
1939 {
1940     NSArray *defaultMenuItems = [[WebDefaultUIDelegate sharedUIDelegate] webView:self contextMenuItemsForElement:element defaultMenuItems:items];
1941     NSArray *menuItems = defaultMenuItems;
1942
1943     // CallUIDelegate returns nil if UIDelegate is nil or doesn't respond to the selector. So we need to check that here
1944     // to distinguish between using defaultMenuItems or the delegate really returning nil to say "no context menu".
1945     SEL selector = @selector(webView:contextMenuItemsForElement:defaultMenuItems:);
1946     if (_private->UIDelegate && [_private->UIDelegate respondsToSelector:selector]) {
1947         menuItems = CallUIDelegate(self, selector, element, defaultMenuItems);
1948         if (!menuItems)
1949             return nil;
1950     }
1951
1952     unsigned count = [menuItems count];
1953     if (!count)
1954         return nil;
1955
1956     NSMenu *menu = [[NSMenu alloc] init];
1957     for (unsigned i = 0; i < count; i++)
1958         [menu addItem:[menuItems objectAtIndex:i]];
1959
1960     return [menu autorelease];
1961 }
1962 #endif
1963
1964 - (void)_mouseDidMoveOverElement:(NSDictionary *)dictionary modifierFlags:(NSUInteger)modifierFlags
1965 {
1966     // We originally intended to call this delegate method sometimes with a nil dictionary, but due to
1967     // a bug dating back to WebKit 1.0 this delegate was never called with nil! Unfortunately we can't
1968     // start calling this with nil since it will break Adobe Help Viewer, and possibly other clients.
1969     if (!dictionary)
1970         return;
1971     CallUIDelegate(self, @selector(webView:mouseDidMoveOverElement:modifierFlags:), dictionary, modifierFlags);
1972 }
1973
1974 - (void)_loadBackForwardListFromOtherView:(WebView *)otherView
1975 {
1976     if (!_private->page)
1977         return;
1978     
1979     if (!otherView->_private->page)
1980         return;
1981     
1982     // It turns out the right combination of behavior is done with the back/forward load
1983     // type.  (See behavior matrix at the top of WebFramePrivate.)  So we copy all the items
1984     // in the back forward list, and go to the current one.
1985
1986     BackForwardClient* backForwardClient = _private->page->backForward().client();
1987     ASSERT(!backForwardClient->currentItem()); // destination list should be empty
1988
1989     BackForwardClient* otherBackForwardClient = otherView->_private->page->backForward().client();
1990     if (!otherBackForwardClient->currentItem())
1991         return; // empty back forward list, bail
1992     
1993     HistoryItem* newItemToGoTo = 0;
1994
1995     int lastItemIndex = otherBackForwardClient->forwardListCount();
1996     for (int i = -otherBackForwardClient->backListCount(); i <= lastItemIndex; ++i) {
1997         if (i == 0) {
1998             // If this item is showing , save away its current scroll and form state,
1999             // since that might have changed since loading and it is normally not saved
2000             // until we leave that page.
2001             otherView->_private->page->mainFrame().loader().history().saveDocumentAndScrollState();
2002         }
2003         RefPtr<HistoryItem> newItem = otherBackForwardClient->itemAtIndex(i)->copy();
2004         if (i == 0) 
2005             newItemToGoTo = newItem.get();
2006         backForwardClient->addItem(newItem.release());
2007     }
2008     
2009     ASSERT(newItemToGoTo);
2010     _private->page->goToItem(newItemToGoTo, FrameLoadTypeIndexedBackForward);
2011 }
2012
2013 - (void)_setFormDelegate: (id<WebFormDelegate>)delegate
2014 {
2015     _private->formDelegate = delegate;
2016 #if PLATFORM(IOS)
2017     [_private->formDelegateForwarder clearTarget];
2018     [_private->formDelegateForwarder release];
2019     _private->formDelegateForwarder = nil;
2020 #endif
2021 }
2022
2023 - (id<WebFormDelegate>)_formDelegate
2024 {
2025     return _private->formDelegate;
2026 }
2027
2028 #if PLATFORM(IOS)
2029 - (id)_formDelegateForwarder
2030 {
2031     if (_private->closing)
2032         return nil;
2033
2034     if (!_private->formDelegateForwarder)
2035         _private->formDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:[self _formDelegate] defaultTarget:[WebDefaultFormDelegate sharedFormDelegate]];
2036     return _private->formDelegateForwarder;
2037 }
2038
2039 - (id)_formDelegateForSelector:(SEL)selector
2040 {
2041     id delegate = self->_private->formDelegate;
2042     if ([delegate respondsToSelector:selector])
2043         return delegate;
2044
2045     delegate = [WebDefaultFormDelegate sharedFormDelegate];
2046     if ([delegate respondsToSelector:selector])
2047         return delegate;
2048
2049     return nil;
2050 }
2051 #endif
2052
2053 #if !PLATFORM(IOS)
2054 - (BOOL)_needsAdobeFrameReloadingQuirk
2055 {
2056     static BOOL needsQuirk = WKAppVersionCheckLessThan(@"com.adobe.Acrobat", -1, 9.0)
2057         || WKAppVersionCheckLessThan(@"com.adobe.Acrobat.Pro", -1, 9.0)
2058         || WKAppVersionCheckLessThan(@"com.adobe.Reader", -1, 9.0)
2059         || WKAppVersionCheckLessThan(@"com.adobe.distiller", -1, 9.0)
2060         || WKAppVersionCheckLessThan(@"com.adobe.Contribute", -1, 4.2)
2061         || WKAppVersionCheckLessThan(@"com.adobe.dreamweaver-9.0", -1, 9.1)
2062         || WKAppVersionCheckLessThan(@"com.macromedia.fireworks", -1, 9.1)
2063         || WKAppVersionCheckLessThan(@"com.adobe.InCopy", -1, 5.1)
2064         || WKAppVersionCheckLessThan(@"com.adobe.InDesign", -1, 5.1)
2065         || WKAppVersionCheckLessThan(@"com.adobe.Soundbooth", -1, 2);
2066
2067     return needsQuirk;
2068 }
2069
2070 - (BOOL)_needsLinkElementTextCSSQuirk
2071 {
2072     static BOOL needsQuirk = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITHOUT_LINK_ELEMENT_TEXT_CSS_QUIRK)
2073         && WKAppVersionCheckLessThan(@"com.e-frontier.shade10", -1, 10.6);
2074     return needsQuirk;
2075 }
2076
2077 - (BOOL)_needsIsLoadingInAPISenseQuirk
2078 {
2079     static BOOL needsQuirk = WKAppVersionCheckLessThan(@"com.apple.iAdProducer", -1, 2.1);
2080     
2081     return needsQuirk;
2082 }
2083
2084 - (BOOL)_needsKeyboardEventDisambiguationQuirks
2085 {
2086     static BOOL needsQuirks = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_IE_COMPATIBLE_KEYBOARD_EVENT_DISPATCH) && !applicationIsSafari();
2087     return needsQuirks;
2088 }
2089
2090 - (BOOL)_needsFrameLoadDelegateRetainQuirk
2091 {
2092     static BOOL needsQuirk = WKAppVersionCheckLessThan(@"com.equinux.iSale5", -1, 5.6);    
2093     return needsQuirk;
2094 }
2095
2096 static bool needsSelfRetainWhileLoadingQuirk()
2097 {
2098     static bool needsQuirk = applicationIsAperture();
2099     return needsQuirk;
2100 }
2101 #endif // !PLATFORM(IOS)
2102
2103 - (BOOL)_needsPreHTML5ParserQuirks
2104 {    
2105 #if !PLATFORM(IOS)
2106     // AOL Instant Messenger and Microsoft My Day contain markup incompatible
2107     // with the new HTML5 parser. If these applications were linked against a
2108     // version of WebKit prior to the introduction of the HTML5 parser, enable
2109     // parser quirks to maintain compatibility. For details, see 
2110     // <https://bugs.webkit.org/show_bug.cgi?id=46134> and
2111     // <https://bugs.webkit.org/show_bug.cgi?id=46334>.
2112     static bool isApplicationNeedingParserQuirks = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_HTML5_PARSER)
2113         && (applicationIsAOLInstantMessenger() || applicationIsMicrosoftMyDay());
2114     
2115     // Mail.app must continue to display HTML email that contains quirky markup.
2116     static bool isAppleMail = applicationIsAppleMail();
2117
2118     return isApplicationNeedingParserQuirks
2119         || isAppleMail
2120 #if ENABLE(DASHBOARD_SUPPORT)
2121         // Pre-HTML5 parser quirks are required to remain compatible with many
2122         // Dashboard widgets. See <rdar://problem/8175982>.
2123         || (_private->page && _private->page->settings().usesDashboardBackwardCompatibilityMode())
2124 #endif
2125         || [[self preferences] usePreHTML5ParserQuirks];
2126 #else
2127     static bool isApplicationNeedingParserQuirks = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_HTML5_PARSER) && applicationIsDaijisenDictionary();
2128     return isApplicationNeedingParserQuirks || [[self preferences] usePreHTML5ParserQuirks];
2129 #endif
2130 }
2131
2132 - (BOOL)_needsUnrestrictedGetMatchedCSSRules
2133 {
2134 #if !PLATFORM(IOS)
2135     static bool needsUnrestrictedGetMatchedCSSRules = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_GET_MATCHED_CSS_RULES_RESTRICTIONS) && applicationIsSafari();
2136     return needsUnrestrictedGetMatchedCSSRules;
2137 #else
2138     // FIXME: <rdar://problem/8963684> Implement linked-on-or-after check for needsUnrestrictedGetMatchedCSSRules
2139     return NO;
2140 #endif
2141 }
2142
2143 - (void)_preferencesChangedNotification:(NSNotification *)notification
2144 {
2145 #if PLATFORM(IOS)
2146     // For WebViews that load synchronously, preference changes need to be propagated
2147     // down to WebCore synchronously so that loads in that WebView have the correct
2148     // up-to-date settings.
2149     if (!WebThreadIsLocked())
2150         WebThreadLock();
2151     if ([[self mainFrame] _loadsSynchronously]) {
2152 #endif
2153
2154     WebPreferences *preferences = (WebPreferences *)[notification object];
2155     [self _preferencesChanged:preferences];
2156
2157 #if PLATFORM(IOS)
2158     } else {
2159         WebThreadRun(^{
2160             // It is possible that the prefs object has already changed before the invocation could be called
2161             // on the web thread. This is not possible on TOT which is why they have a simple ASSERT.
2162             WebPreferences *preferences = (WebPreferences *)[notification object];
2163             if (preferences != [self preferences])
2164                 return;
2165             [self _preferencesChanged:preferences];
2166         });
2167     }
2168 #endif
2169 }
2170
2171 - (void)_preferencesChanged:(WebPreferences *)preferences
2172 {    
2173     ASSERT(preferences == [self preferences]);
2174     if (!_private->userAgentOverridden)
2175         _private->userAgent = String();
2176
2177     // Cache this value so we don't have to read NSUserDefaults on each page load
2178     _private->useSiteSpecificSpoofing = [preferences _useSiteSpecificSpoofing];
2179
2180     // Update corresponding WebCore Settings object.
2181     if (!_private->page)
2182         return;
2183
2184 #if PLATFORM(IOS)
2185     // iOS waits to call [WebDatabaseManager sharedWebDatabaseManager] until
2186     // didOneTimeInitialization is true so that we don't initialize databases
2187     // until the first WebView has been created. This is because database
2188     // initialization current requires disk access to populate the origins
2189     // quota map and we want to do this lazily by waiting until WebKit is
2190     // used to display web content in a WebView. The possible cases are:
2191     //   - on one time initialize (the first WebView creation) if databases are enabled (default)
2192     //   - when databases are dynamically enabled later, and they were disabled at startup (this case)
2193     if (didOneTimeInitialization) {
2194         if ([preferences databasesEnabled])
2195             [WebDatabaseManager sharedWebDatabaseManager];
2196         
2197         if ([preferences storageTrackerEnabled])
2198             WebKitInitializeStorageIfNecessary();
2199     }
2200 #endif
2201     
2202     Settings& settings = _private->page->settings();
2203
2204     settings.setCursiveFontFamily([preferences cursiveFontFamily]);
2205     settings.setDefaultFixedFontSize([preferences defaultFixedFontSize]);
2206     settings.setDefaultFontSize([preferences defaultFontSize]);
2207     settings.setDefaultTextEncodingName([preferences defaultTextEncodingName]);
2208     settings.setUsesEncodingDetector([preferences usesEncodingDetector]);
2209     settings.setFantasyFontFamily([preferences fantasyFontFamily]);
2210     settings.setFixedFontFamily([preferences fixedFontFamily]);
2211     settings.setScreenFontSubstitutionEnabled(
2212 #if !PLATFORM(IOS) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
2213         [[NSUserDefaults standardUserDefaults] boolForKey:@"NSFontDefaultScreenFontSubstitutionEnabled"] ||
2214 #endif
2215         [preferences screenFontSubstitutionEnabled]
2216     );
2217     settings.setForceFTPDirectoryListings([preferences _forceFTPDirectoryListings]);
2218     settings.setFTPDirectoryTemplatePath([preferences _ftpDirectoryTemplatePath]);
2219     settings.setLocalStorageDatabasePath([preferences _localStorageDatabasePath]);
2220     settings.setJavaEnabled([preferences isJavaEnabled]);
2221     settings.setScriptEnabled([preferences isJavaScriptEnabled]);
2222     settings.setWebSecurityEnabled([preferences isWebSecurityEnabled]);
2223     settings.setAllowUniversalAccessFromFileURLs([preferences allowUniversalAccessFromFileURLs]);
2224     settings.setAllowFileAccessFromFileURLs([preferences allowFileAccessFromFileURLs]);
2225     settings.setJavaScriptCanOpenWindowsAutomatically([preferences javaScriptCanOpenWindowsAutomatically]);
2226     settings.setMinimumFontSize([preferences minimumFontSize]);
2227     settings.setMinimumLogicalFontSize([preferences minimumLogicalFontSize]);
2228     settings.setPictographFontFamily([preferences pictographFontFamily]);
2229     settings.setPluginsEnabled([preferences arePlugInsEnabled]);
2230 #if ENABLE(SQL_DATABASE)
2231     DatabaseManager::manager().setIsAvailable([preferences databasesEnabled]);
2232 #endif
2233     settings.setLocalStorageEnabled([preferences localStorageEnabled]);
2234 #if !PLATFORM(IOS)
2235     settings.setExperimentalNotificationsEnabled([preferences experimentalNotificationsEnabled]);
2236 #endif
2237     _private->page->enableLegacyPrivateBrowsing([preferences privateBrowsingEnabled]);
2238     settings.setSansSerifFontFamily([preferences sansSerifFontFamily]);
2239     settings.setSerifFontFamily([preferences serifFontFamily]);
2240     settings.setStandardFontFamily([preferences standardFontFamily]);
2241     settings.setLoadsImagesAutomatically([preferences loadsImagesAutomatically]);
2242     settings.setLoadsSiteIconsIgnoringImageLoadingSetting([preferences loadsSiteIconsIgnoringImageLoadingPreference]);
2243 #if PLATFORM(IOS)
2244     settings.setShouldPrintBackgrounds(true);
2245 #else
2246     settings.setShouldPrintBackgrounds([preferences shouldPrintBackgrounds]);
2247     settings.setTextAreasAreResizable([preferences textAreasAreResizable]);
2248 #endif
2249     settings.setShrinksStandaloneImagesToFit([preferences shrinksStandaloneImagesToFit]);
2250     settings.setEditableLinkBehavior(core([preferences editableLinkBehavior]));
2251     settings.setTextDirectionSubmenuInclusionBehavior(core([preferences textDirectionSubmenuInclusionBehavior]));
2252     settings.setDOMPasteAllowed([preferences isDOMPasteAllowed]);
2253     settings.setUsesPageCache([self usesPageCache]);
2254     settings.setPageCacheSupportsPlugins([preferences pageCacheSupportsPlugins]);
2255     settings.setBackForwardCacheExpirationInterval([preferences _backForwardCacheExpirationInterval]);
2256 #if !PLATFORM(IOS)
2257     settings.setShowsURLsInToolTips([preferences showsURLsInToolTips]);
2258     settings.setShowsToolTipOverTruncatedText([preferences showsToolTipOverTruncatedText]);
2259 #endif
2260     settings.setDeveloperExtrasEnabled([preferences developerExtrasEnabled]);
2261     settings.setJavaScriptExperimentsEnabled([preferences javaScriptExperimentsEnabled]);
2262     settings.setAuthorAndUserStylesEnabled([preferences authorAndUserStylesEnabled]);
2263     settings.setApplicationChromeMode([preferences applicationChromeModeEnabled]);
2264 #if !PLATFORM(IOS)
2265     if ([preferences userStyleSheetEnabled]) {
2266         NSString* location = [[preferences userStyleSheetLocation] _web_originalDataAsString];
2267         if ([location isEqualToString:@"apple-dashboard://stylesheet"])
2268             location = @"file:///System/Library/PrivateFrameworks/DashboardClient.framework/Resources/widget.css";
2269         settings.setUserStyleSheetLocation([NSURL URLWithString:(location ? location : @"")]);
2270     } else
2271         settings.setUserStyleSheetLocation([NSURL URLWithString:@""]);
2272     settings.setNeedsAdobeFrameReloadingQuirk([self _needsAdobeFrameReloadingQuirk]);
2273     settings.setTreatsAnyTextCSSLinkAsStylesheet([self _needsLinkElementTextCSSQuirk]);
2274     settings.setNeedsKeyboardEventDisambiguationQuirks([self _needsKeyboardEventDisambiguationQuirks]);
2275 #else
2276     // iOS-specific settings
2277     settings.setStandalone([preferences _standalone]);
2278     settings.setTelephoneNumberParsingEnabled([preferences _telephoneNumberParsingEnabled]);
2279     settings.setAlwaysUseBaselineOfPrimaryFont([preferences _alwaysUseBaselineOfPrimaryFont]);
2280     settings.setAllowMultiElementImplicitSubmission([preferences _allowMultiElementImplicitFormSubmission]);
2281     settings.setLayoutInterval(std::chrono::milliseconds([preferences _layoutInterval]));
2282     settings.setMaxParseDuration([preferences _maxParseDuration]);
2283     settings.setAlwaysUseAcceleratedOverflowScroll([preferences _alwaysUseAcceleratedOverflowScroll]);
2284 #endif
2285     settings.setNeedsSiteSpecificQuirks(_private->useSiteSpecificSpoofing);
2286     settings.setWebArchiveDebugModeEnabled([preferences webArchiveDebugModeEnabled]);
2287     settings.setLocalFileContentSniffingEnabled([preferences localFileContentSniffingEnabled]);
2288     settings.setOfflineWebApplicationCacheEnabled([preferences offlineWebApplicationCacheEnabled]);
2289     settings.setJavaScriptCanAccessClipboard([preferences javaScriptCanAccessClipboard]);
2290     settings.setXSSAuditorEnabled([preferences isXSSAuditorEnabled]);
2291 #if !PLATFORM(IOS)
2292     settings.setEnforceCSSMIMETypeInNoQuirksMode(!WKAppVersionCheckLessThan(@"com.apple.iWeb", -1, 2.1));
2293 #endif
2294     settings.setDNSPrefetchingEnabled([preferences isDNSPrefetchingEnabled]);
2295     
2296     // FIXME: Enabling accelerated compositing when WebGL is enabled causes tests to fail on Leopard which expect HW compositing to be disabled.
2297     // Until we fix that, I will comment out the test (CFM)
2298     settings.setAcceleratedCompositingEnabled([preferences acceleratedCompositingEnabled]);
2299     settings.setAcceleratedDrawingEnabled([preferences acceleratedDrawingEnabled]);
2300     settings.setCanvasUsesAcceleratedDrawing([preferences canvasUsesAcceleratedDrawing]);    
2301     settings.setShowDebugBorders([preferences showDebugBorders]);
2302     settings.setShowRepaintCounter([preferences showRepaintCounter]);
2303     settings.setWebGLEnabled([preferences webGLEnabled]);
2304 #if !PLATFORM(IOS)
2305     // FIXME: Should we enable this following <rdar://problem/15290404>?
2306     settings.setMultithreadedWebGLEnabled([preferences multithreadedWebGLEnabled]);
2307 #endif
2308     settings.setForceSoftwareWebGLRendering([preferences forceSoftwareWebGLRendering]);
2309     settings.setAccelerated2dCanvasEnabled([preferences accelerated2dCanvasEnabled]);
2310     settings.setLoadDeferringEnabled(shouldEnableLoadDeferring());
2311     settings.setWindowFocusRestricted(shouldRestrictWindowFocus());
2312     settings.setFrameFlatteningEnabled([preferences isFrameFlatteningEnabled]);
2313     settings.setSpatialNavigationEnabled([preferences isSpatialNavigationEnabled]);
2314     settings.setPaginateDuringLayoutEnabled([preferences paginateDuringLayoutEnabled]);
2315     RuntimeEnabledFeatures::sharedFeatures().setCSSRegionsEnabled([preferences cssRegionsEnabled]);
2316     RuntimeEnabledFeatures::sharedFeatures().setCSSCompositingEnabled([preferences cssCompositingEnabled]);
2317 #if ENABLE(WEB_AUDIO)
2318     settings.setWebAudioEnabled([preferences webAudioEnabled]);
2319 #endif
2320 #if ENABLE(FULLSCREEN_API)
2321     settings.setFullScreenEnabled([preferences fullScreenEnabled]);
2322 #endif
2323     settings.setAsynchronousSpellCheckingEnabled([preferences asynchronousSpellCheckingEnabled]);
2324     settings.setHyperlinkAuditingEnabled([preferences hyperlinkAuditingEnabled]);
2325     settings.setUsePreHTML5ParserQuirks([self _needsPreHTML5ParserQuirks]);
2326     settings.setCrossOriginCheckInGetMatchedCSSRulesDisabled([self _needsUnrestrictedGetMatchedCSSRules]);
2327     settings.setInteractiveFormValidationEnabled([self interactiveFormValidationEnabled]);
2328     settings.setValidationMessageTimerMagnification([self validationMessageTimerMagnification]);
2329 #if USE(AVFOUNDATION)
2330     settings.setAVFoundationEnabled([preferences isAVFoundationEnabled]);
2331 #endif
2332 #if PLATFORM(MAC)
2333     settings.setQTKitEnabled([preferences isQTKitEnabled]);
2334 #endif
2335 #if PLATFORM(IOS)
2336     settings.setMediaPlaybackAllowsAirPlay([preferences mediaPlaybackAllowsAirPlay]);
2337     settings.setAudioSessionCategoryOverride([preferences audioSessionCategoryOverride]);
2338     settings.setNetworkDataUsageTrackingEnabled([preferences networkDataUsageTrackingEnabled]);
2339     settings.setNetworkInterfaceName([preferences networkInterfaceName]);
2340     settings.setAVKitEnabled([preferences avKitEnabled]);
2341 #endif
2342     settings.setMediaPlaybackRequiresUserGesture([preferences mediaPlaybackRequiresUserGesture]);
2343     settings.setMediaPlaybackAllowsInline([preferences mediaPlaybackAllowsInline]);
2344     settings.setSuppressesIncrementalRendering([preferences suppressesIncrementalRendering]);
2345     settings.setRegionBasedColumnsEnabled([preferences regionBasedColumnsEnabled]);
2346     settings.setBackspaceKeyNavigationEnabled([preferences backspaceKeyNavigationEnabled]);
2347     settings.setWantsBalancedSetDefersLoadingBehavior([preferences wantsBalancedSetDefersLoadingBehavior]);
2348     settings.setMockScrollbarsEnabled([preferences mockScrollbarsEnabled]);
2349
2350 #if ENABLE(VIDEO_TRACK)
2351     settings.setShouldDisplaySubtitles([preferences shouldDisplaySubtitles]);
2352     settings.setShouldDisplayCaptions([preferences shouldDisplayCaptions]);
2353     settings.setShouldDisplayTextDescriptions([preferences shouldDisplayTextDescriptions]);
2354 #endif
2355
2356     settings.setShouldRespectImageOrientation([preferences shouldRespectImageOrientation]);
2357 #if !PLATFORM(IOS)
2358     settings.setNeedsIsLoadingInAPISenseQuirk([self _needsIsLoadingInAPISenseQuirk]);
2359 #endif
2360     settings.setRequestAnimationFrameEnabled([preferences requestAnimationFrameEnabled]);
2361     settings.setDiagnosticLoggingEnabled([preferences diagnosticLoggingEnabled]);
2362     settings.setLowPowerVideoAudioBufferSizeEnabled([preferences lowPowerVideoAudioBufferSizeEnabled]);
2363
2364     settings.setUseLegacyTextAlignPositionedElementBehavior([preferences useLegacyTextAlignPositionedElementBehavior]);
2365
2366 #if ENABLE(MEDIA_SOURCE)
2367     settings.setMediaSourceEnabled([preferences mediaSourceEnabled]);
2368 #endif
2369
2370 #if ENABLE(SERVICE_CONTROLS)
2371     settings.setImageControlsEnabled([preferences imageControlsEnabled]);
2372 #endif
2373
2374     settings.setShouldConvertPositionStyleOnCopy([preferences shouldConvertPositionStyleOnCopy]);
2375
2376     settings.setEnableInheritURIQueryComponent([preferences isInheritURIQueryComponentEnabled]);
2377
2378     switch ([preferences storageBlockingPolicy]) {
2379     case WebAllowAllStorage:
2380         settings.setStorageBlockingPolicy(SecurityOrigin::AllowAllStorage);
2381         break;
2382     case WebBlockThirdPartyStorage:
2383         settings.setStorageBlockingPolicy(SecurityOrigin::BlockThirdPartyStorage);
2384         break;
2385     case WebBlockAllStorage:
2386         settings.setStorageBlockingPolicy(SecurityOrigin::BlockAllStorage);
2387         break;
2388     }
2389
2390     settings.setPlugInSnapshottingEnabled([preferences plugInSnapshottingEnabled]);
2391
2392 #if ENABLE(HIDDEN_PAGE_DOM_TIMER_THROTTLING)
2393     settings.setHiddenPageDOMTimerThrottlingEnabled([preferences hiddenPageDOMTimerThrottlingEnabled]);
2394 #endif
2395 #if ENABLE(PAGE_VISIBILITY_API)
2396     settings.setHiddenPageCSSAnimationSuspensionEnabled([preferences hiddenPageCSSAnimationSuspensionEnabled]);
2397 #endif
2398
2399     // We have enabled this setting in WebKit2 for the sake of some ScrollingCoordinator work.
2400     // To avoid possible rendering differences, we should enable it for WebKit1 too. We also
2401     // want to keep this setting enabled for iOS. See <rdar://problem/9813262> for more details.
2402     settings.setFixedPositionCreatesStackingContext(true);
2403     
2404     NSTimeInterval timeout = [preferences incrementalRenderingSuppressionTimeoutInSeconds];
2405     if (timeout > 0)
2406         settings.setIncrementalRenderingSuppressionTimeoutInSeconds(timeout);
2407
2408     // Application Cache Preferences are stored on the global cache storage manager, not in Settings.
2409     [WebApplicationCache setDefaultOriginQuota:[preferences applicationCacheDefaultOriginQuota]];
2410
2411     BOOL zoomsTextOnly = [preferences zoomsTextOnly];
2412     if (_private->zoomsTextOnly != zoomsTextOnly)
2413         [self _setZoomMultiplier:_private->zoomMultiplier isTextOnly:zoomsTextOnly];
2414
2415 #if ENABLE(IOS_TEXT_AUTOSIZING)
2416     settings.setMinimumZoomFontSize([preferences _minimumZoomFontSize]);
2417 #endif
2418
2419 #if ENABLE(DISK_IMAGE_CACHE) && PLATFORM(IOS)
2420     DiskImageCache& diskImageCache = WebCore::diskImageCache();
2421     diskImageCache.setEnabled([preferences diskImageCacheEnabled]);
2422     diskImageCache.setMinimumImageSize([preferences diskImageCacheMinimumImageSize]);
2423     diskImageCache.setMaximumCacheSize([preferences diskImageCacheMaximumCacheSize]);
2424 #endif
2425
2426 #if PLATFORM(IOS)
2427     [[self window] setTileBordersVisible:[preferences showDebugBorders]];
2428     [[self window] setTilePaintCountsVisible:[preferences showRepaintCounter]];
2429     [[self window] setAcceleratedDrawingEnabled:[preferences acceleratedDrawingEnabled]];
2430     [WAKView _setInterpolationQuality:[preferences _interpolationQuality]];
2431     settings.setDelegatesPageScaling(true);
2432     
2433     settings.setShouldTransformsAffectOverflow(shouldTransformsAffectOverflow());
2434     settings.setShouldDispatchJavaScriptWindowOnErrorEvents(shouldDispatchJavaScriptWindowOnErrorEvents());
2435     ASSERT_WITH_MESSAGE(settings.pageCacheSupportsPlugins(), "PageCacheSupportsPlugins should be enabled on iOS.");
2436
2437     // Password echo
2438     settings.setPasswordEchoEnabled([preferences _allowPasswordEcho]);
2439     settings.setPasswordEchoDurationInSeconds([preferences _passwordEchoDuration]);
2440 #endif
2441 }
2442
2443 static inline IMP getMethod(id o, SEL s)
2444 {
2445     return [o respondsToSelector:s] ? [o methodForSelector:s] : 0;
2446 }
2447
2448 #if PLATFORM(IOS)
2449 - (id)_UIKitDelegateForwarder
2450 {
2451     if (_private->closing)
2452         return nil;
2453         
2454     if (!_private->UIKitDelegateForwarder)
2455         _private->UIKitDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:_private->UIKitDelegate defaultTarget:[WebDefaultUIKitDelegate sharedUIKitDelegate]];
2456     return _private->UIKitDelegateForwarder;
2457 }
2458 #endif
2459
2460 - (void)_cacheResourceLoadDelegateImplementations
2461 {
2462     WebResourceDelegateImplementationCache *cache = &_private->resourceLoadDelegateImplementations;
2463     id delegate = _private->resourceProgressDelegate;
2464
2465     if (!delegate) {
2466         bzero(cache, sizeof(WebResourceDelegateImplementationCache));
2467         return;
2468     }
2469
2470     cache->didCancelAuthenticationChallengeFunc = getMethod(delegate, @selector(webView:resource:didCancelAuthenticationChallenge:fromDataSource:));
2471     cache->didFailLoadingWithErrorFromDataSourceFunc = getMethod(delegate, @selector(webView:resource:didFailLoadingWithError:fromDataSource:));
2472     cache->didFinishLoadingFromDataSourceFunc = getMethod(delegate, @selector(webView:resource:didFinishLoadingFromDataSource:));
2473     cache->didLoadResourceFromMemoryCacheFunc = getMethod(delegate, @selector(webView:didLoadResourceFromMemoryCache:response:length:fromDataSource:));
2474     cache->didReceiveAuthenticationChallengeFunc = getMethod(delegate, @selector(webView:resource:didReceiveAuthenticationChallenge:fromDataSource:));
2475 #if USE(PROTECTION_SPACE_AUTH_CALLBACK)
2476     cache->canAuthenticateAgainstProtectionSpaceFunc = getMethod(delegate, @selector(webView:resource:canAuthenticateAgainstProtectionSpace:forDataSource:));
2477 #endif
2478
2479 #if PLATFORM(IOS)
2480     cache->connectionPropertiesFunc = getMethod(delegate, @selector(webView:connectionPropertiesForResource:dataSource:));
2481     cache->webThreadDidFinishLoadingFromDataSourceFunc = getMethod(delegate, @selector(webThreadWebView:resource:didFinishLoadingFromDataSource:));
2482     cache->webThreadDidFailLoadingWithErrorFromDataSourceFunc = getMethod(delegate, @selector(webThreadWebView:resource:didFailLoadingWithError:fromDataSource:));
2483     cache->webThreadIdentifierForRequestFunc = getMethod(delegate, @selector(webThreadWebView:identifierForInitialRequest:fromDataSource:));
2484     cache->webThreadDidLoadResourceFromMemoryCacheFunc = getMethod(delegate, @selector(webThreadWebView:didLoadResourceFromMemoryCache:response:length:fromDataSource:));
2485     cache->webThreadWillSendRequestFunc = getMethod(delegate, @selector(webThreadWebView:resource:willSendRequest:redirectResponse:fromDataSource:));
2486     cache->webThreadDidReceiveResponseFunc = getMethod(delegate, @selector(webThreadWebView:resource:didReceiveResponse:fromDataSource:));
2487     cache->webThreadDidReceiveContentLengthFunc = getMethod(delegate, @selector(webThreadWebView:resource:didReceiveContentLength:fromDataSource:));
2488     cache->webThreadWillCacheResponseFunc = getMethod(delegate, @selector(webThreadWebView:resource:willCacheResponse:fromDataSource:));
2489 #endif
2490
2491     cache->didReceiveContentLengthFunc = getMethod(delegate, @selector(webView:resource:didReceiveContentLength:fromDataSource:));
2492     cache->didReceiveResponseFunc = getMethod(delegate, @selector(webView:resource:didReceiveResponse:fromDataSource:));
2493     cache->identifierForRequestFunc = getMethod(delegate, @selector(webView:identifierForInitialRequest:fromDataSource:));
2494     cache->plugInFailedWithErrorFunc = getMethod(delegate, @selector(webView:plugInFailedWithError:dataSource:));
2495     cache->willCacheResponseFunc = getMethod(delegate, @selector(webView:resource:willCacheResponse:fromDataSource:));
2496     cache->willSendRequestFunc = getMethod(delegate, @selector(webView:resource:willSendRequest:redirectResponse:fromDataSource:));
2497     cache->shouldUseCredentialStorageFunc = getMethod(delegate, @selector(webView:resource:shouldUseCredentialStorageForDataSource:));
2498     cache->shouldPaintBrokenImageForURLFunc = getMethod(delegate, @selector(webView:shouldPaintBrokenImageForURL:));
2499 }
2500
2501 - (void)_cacheFrameLoadDelegateImplementations
2502 {
2503     WebFrameLoadDelegateImplementationCache *cache = &_private->frameLoadDelegateImplementations;
2504     id delegate = _private->frameLoadDelegate;
2505
2506     if (!delegate) {
2507         bzero(cache, sizeof(WebFrameLoadDelegateImplementationCache));
2508         return;
2509     }
2510
2511     cache->didCancelClientRedirectForFrameFunc = getMethod(delegate, @selector(webView:didCancelClientRedirectForFrame:));
2512     cache->didChangeLocationWithinPageForFrameFunc = getMethod(delegate, @selector(webView:didChangeLocationWithinPageForFrame:));
2513     cache->didPushStateWithinPageForFrameFunc = getMethod(delegate, @selector(webView:didPushStateWithinPageForFrame:));
2514     cache->didReplaceStateWithinPageForFrameFunc = getMethod(delegate, @selector(webView:didReplaceStateWithinPageForFrame:));
2515     cache->didPopStateWithinPageForFrameFunc = getMethod(delegate, @selector(webView:didPopStateWithinPageForFrame:));
2516 #if JSC_OBJC_API_ENABLED
2517     cache->didCreateJavaScriptContextForFrameFunc = getMethod(delegate, @selector(webView:didCreateJavaScriptContext:forFrame:));
2518 #endif
2519     cache->didClearWindowObjectForFrameFunc = getMethod(delegate, @selector(webView:didClearWindowObject:forFrame:));
2520     cache->didClearWindowObjectForFrameInScriptWorldFunc = getMethod(delegate, @selector(webView:didClearWindowObjectForFrame:inScriptWorld:));
2521     cache->didClearInspectorWindowObjectForFrameFunc = getMethod(delegate, @selector(webView:didClearInspectorWindowObject:forFrame:));
2522     cache->didCommitLoadForFrameFunc = getMethod(delegate, @selector(webView:didCommitLoadForFrame:));
2523     cache->didFailLoadWithErrorForFrameFunc = getMethod(delegate, @selector(webView:didFailLoadWithError:forFrame:));
2524     cache->didFailProvisionalLoadWithErrorForFrameFunc = getMethod(delegate, @selector(webView:didFailProvisionalLoadWithError:forFrame:));
2525     cache->didFinishDocumentLoadForFrameFunc = getMethod(delegate, @selector(webView:didFinishDocumentLoadForFrame:));
2526     cache->didFinishLoadForFrameFunc = getMethod(delegate, @selector(webView:didFinishLoadForFrame:));
2527     cache->didFirstLayoutInFrameFunc = getMethod(delegate, @selector(webView:didFirstLayoutInFrame:));
2528     cache->didFirstVisuallyNonEmptyLayoutInFrameFunc = getMethod(delegate, @selector(webView:didFirstVisuallyNonEmptyLayoutInFrame:));
2529     cache->didLayoutFunc = getMethod(delegate, @selector(webView:didLayout:));
2530     cache->didHandleOnloadEventsForFrameFunc = getMethod(delegate, @selector(webView:didHandleOnloadEventsForFrame:));
2531 #if ENABLE(ICONDATABASE)
2532     cache->didReceiveIconForFrameFunc = getMethod(delegate, @selector(webView:didReceiveIcon:forFrame:));
2533 #endif
2534     cache->didReceiveServerRedirectForProvisionalLoadForFrameFunc = getMethod(delegate, @selector(webView:didReceiveServerRedirectForProvisionalLoadForFrame:));
2535     cache->didReceiveTitleForFrameFunc = getMethod(delegate, @selector(webView:didReceiveTitle:forFrame:));
2536     cache->didStartProvisionalLoadForFrameFunc = getMethod(delegate, @selector(webView:didStartProvisionalLoadForFrame:));
2537     cache->willCloseFrameFunc = getMethod(delegate, @selector(webView:willCloseFrame:));
2538     cache->willPerformClientRedirectToURLDelayFireDateForFrameFunc = getMethod(delegate, @selector(webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:));
2539     cache->windowScriptObjectAvailableFunc = getMethod(delegate, @selector(webView:windowScriptObjectAvailable:));
2540     cache->didDisplayInsecureContentFunc = getMethod(delegate, @selector(webViewDidDisplayInsecureContent:));
2541     cache->didRunInsecureContentFunc = getMethod(delegate, @selector(webView:didRunInsecureContent:));
2542     cache->didDetectXSSFunc = getMethod(delegate, @selector(webView:didDetectXSS:));
2543     cache->didRemoveFrameFromHierarchyFunc = getMethod(delegate, @selector(webView:didRemoveFrameFromHierarchy:));
2544 #if PLATFORM(IOS)
2545     cache->webThreadDidLayoutFunc = getMethod(delegate, @selector(webThreadWebView:didLayout:));
2546 #endif
2547
2548     // It would be nice to get rid of this code and transition all clients to using didLayout instead of
2549     // didFirstLayoutInFrame and didFirstVisuallyNonEmptyLayoutInFrame. In the meantime, this is required
2550     // for backwards compatibility.
2551     Page* page = core(self);
2552     if (page) {
2553         unsigned milestones = DidFirstLayout;
2554 #if PLATFORM(IOS)
2555         milestones |= DidFirstVisuallyNonEmptyLayout;
2556 #else
2557         if (cache->didFirstVisuallyNonEmptyLayoutInFrameFunc)
2558             milestones |= DidFirstVisuallyNonEmptyLayout;
2559 #endif
2560         page->addLayoutMilestones(static_cast<LayoutMilestones>(milestones));
2561     }
2562 }
2563
2564 - (void)_cacheScriptDebugDelegateImplementations
2565 {
2566     WebScriptDebugDelegateImplementationCache *cache = &_private->scriptDebugDelegateImplementations;
2567     id delegate = _private->scriptDebugDelegate;
2568
2569     if (!delegate) {
2570         bzero(cache, sizeof(WebScriptDebugDelegateImplementationCache));
2571         return;
2572     }
2573
2574     cache->didParseSourceFunc = getMethod(delegate, @selector(webView:didParseSource:baseLineNumber:fromURL:sourceId:forWebFrame:));
2575     if (cache->didParseSourceFunc)
2576         cache->didParseSourceExpectsBaseLineNumber = YES;
2577     else {
2578         cache->didParseSourceExpectsBaseLineNumber = NO;
2579         cache->didParseSourceFunc = getMethod(delegate, @selector(webView:didParseSource:fromURL:sourceId:forWebFrame:));
2580     }
2581
2582     cache->failedToParseSourceFunc = getMethod(delegate, @selector(webView:failedToParseSource:baseLineNumber:fromURL:withError:forWebFrame:));
2583
2584     cache->exceptionWasRaisedFunc = getMethod(delegate, @selector(webView:exceptionWasRaised:hasHandler:sourceId:line:forWebFrame:));
2585     if (cache->exceptionWasRaisedFunc)
2586         cache->exceptionWasRaisedExpectsHasHandlerFlag = YES;
2587     else {
2588         cache->exceptionWasRaisedExpectsHasHandlerFlag = NO;
2589         cache->exceptionWasRaisedFunc = getMethod(delegate, @selector(webView:exceptionWasRaised:sourceId:line:forWebFrame:));
2590     }
2591 }
2592
2593 - (void)_cacheHistoryDelegateImplementations
2594 {
2595     WebHistoryDelegateImplementationCache *cache = &_private->historyDelegateImplementations;
2596     id delegate = _private->historyDelegate;
2597
2598     if (!delegate) {
2599         bzero(cache, sizeof(WebHistoryDelegateImplementationCache));
2600         return;
2601     }
2602
2603     cache->navigatedFunc = getMethod(delegate, @selector(webView:didNavigateWithNavigationData:inFrame:));
2604     cache->clientRedirectFunc = getMethod(delegate, @selector(webView:didPerformClientRedirectFromURL:toURL:inFrame:));
2605     cache->serverRedirectFunc = getMethod(delegate, @selector(webView:didPerformServerRedirectFromURL:toURL:inFrame:));
2606     cache->deprecatedSetTitleFunc = getMethod(delegate, @selector(webView:updateHistoryTitle:forURL:));
2607     cache->setTitleFunc = getMethod(delegate, @selector(webView:updateHistoryTitle:forURL:inFrame:));
2608     cache->populateVisitedLinksFunc = getMethod(delegate, @selector(populateVisitedLinksForWebView:));
2609 }
2610
2611 - (id)_policyDelegateForwarder
2612 {
2613 #if PLATFORM(IOS)
2614     if (_private->closing)
2615         return nil;
2616 #endif
2617     if (!_private->policyDelegateForwarder)
2618         _private->policyDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:_private->policyDelegate defaultTarget:[WebDefaultPolicyDelegate sharedPolicyDelegate]];
2619     return _private->policyDelegateForwarder;
2620 }
2621
2622 - (id)_UIDelegateForwarder
2623 {
2624 #if PLATFORM(IOS)
2625     if (_private->closing)
2626         return nil;
2627 #endif
2628     if (!_private->UIDelegateForwarder)
2629         _private->UIDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:_private->UIDelegate defaultTarget:[WebDefaultUIDelegate sharedUIDelegate]];
2630     return _private->UIDelegateForwarder;
2631 }
2632
2633 #if PLATFORM(IOS)
2634 - (id)_UIDelegateForSelector:(SEL)selector
2635 {
2636     id delegate = self->_private->UIDelegate;
2637     if ([delegate respondsToSelector:selector])
2638         return delegate;
2639
2640     delegate = [WebDefaultUIDelegate sharedUIDelegate];
2641     if ([delegate respondsToSelector:selector])
2642         return delegate;
2643
2644     return nil;
2645 }
2646 #endif
2647
2648 - (id)_editingDelegateForwarder
2649 {
2650 #if PLATFORM(IOS)
2651     if (_private->closing)
2652         return nil;
2653 #endif    
2654     // This can be called during window deallocation by QTMovieView in the QuickTime Cocoa Plug-in.
2655     // Not sure if that is a bug or not.
2656     if (!_private)
2657         return nil;
2658
2659     if (!_private->editingDelegateForwarder)
2660         _private->editingDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:_private->editingDelegate defaultTarget:[WebDefaultEditingDelegate sharedEditingDelegate]];
2661     return _private->editingDelegateForwarder;
2662 }
2663
2664 - (void)_closeWindow
2665 {
2666     [[self _UIDelegateForwarder] webViewClose:self];
2667 }
2668
2669 + (void)_unregisterViewClassAndRepresentationClassForMIMEType:(NSString *)MIMEType
2670 {
2671     [[WebFrameView _viewTypesAllowImageTypeOmission:NO] removeObjectForKey:MIMEType];
2672     [[WebDataSource _repTypesAllowImageTypeOmission:NO] removeObjectForKey:MIMEType];
2673     
2674     // FIXME: We also need to maintain MIMEType registrations (which can be dynamically changed)
2675     // in the WebCore MIMEType registry.  For now we're doing this in a safe, limited manner
2676     // to fix <rdar://problem/5372989> - a future revamping of the entire system is neccesary for future robustness
2677     MIMETypeRegistry::getSupportedNonImageMIMETypes().remove(MIMEType);
2678 }
2679
2680 + (void)_registerViewClass:(Class)viewClass representationClass:(Class)representationClass forURLScheme:(NSString *)URLScheme
2681 {
2682     NSString *MIMEType = [self _generatedMIMETypeForURLScheme:URLScheme];
2683     [self registerViewClass:viewClass representationClass:representationClass forMIMEType:MIMEType];
2684
2685     // FIXME: We also need to maintain MIMEType registrations (which can be dynamically changed)
2686     // in the WebCore MIMEType registry.  For now we're doing this in a safe, limited manner
2687     // to fix <rdar://problem/5372989> - a future revamping of the entire system is neccesary for future robustness
2688     if ([viewClass class] == [WebHTMLView class])
2689         MIMETypeRegistry::getSupportedNonImageMIMETypes().add(MIMEType);
2690     
2691     // This is used to make _representationExistsForURLScheme faster.
2692     // Without this set, we'd have to create the MIME type each time.
2693     if (schemesWithRepresentationsSet == nil) {
2694         schemesWithRepresentationsSet = [[NSMutableSet alloc] init];
2695     }
2696     [schemesWithRepresentationsSet addObject:[[[URLScheme lowercaseString] copy] autorelease]];
2697 }
2698
2699 + (NSString *)_generatedMIMETypeForURLScheme:(NSString *)URLScheme
2700 {
2701     return [@"x-apple-web-kit/" stringByAppendingString:[URLScheme lowercaseString]];
2702 }
2703
2704 + (BOOL)_representationExistsForURLScheme:(NSString *)URLScheme
2705 {
2706     return [schemesWithRepresentationsSet containsObject:[URLScheme lowercaseString]];
2707 }
2708
2709 + (BOOL)_canHandleRequest:(NSURLRequest *)request forMainFrame:(BOOL)forMainFrame
2710 {
2711     // FIXME: If <rdar://problem/5217309> gets fixed, this check can be removed.
2712     if (!request)
2713         return NO;
2714
2715     if ([NSURLConnection canHandleRequest:request])
2716         return YES;
2717
2718     NSString *scheme = [[request URL] scheme];
2719
2720     // Representations for URL schemes work at the top level.
2721     if (forMainFrame && [self _representationExistsForURLScheme:scheme])
2722         return YES;
2723
2724     if ([scheme _webkit_isCaseInsensitiveEqualToString:@"applewebdata"])
2725         return YES;
2726
2727 #if ENABLE(BLOB)
2728     if ([scheme _webkit_isCaseInsensitiveEqualToString:@"blob"])
2729         return YES;
2730 #endif
2731
2732     return NO;
2733 }
2734
2735 + (BOOL)_canHandleRequest:(NSURLRequest *)request
2736 {
2737     return [self _canHandleRequest:request forMainFrame:YES];
2738 }
2739
2740 + (NSString *)_decodeData:(NSData *)data
2741 {
2742     HTMLNames::init(); // this method is used for importing bookmarks at startup, so HTMLNames are likely to be uninitialized yet
2743     return TextResourceDecoder::create("text/html")->decodeAndFlush(static_cast<const char*>([data bytes]), [data length]); // bookmark files are HTML
2744 }
2745
2746 - (void)_pushPerformingProgrammaticFocus
2747 {
2748     _private->programmaticFocusCount++;
2749 }
2750
2751 - (void)_popPerformingProgrammaticFocus
2752 {
2753     _private->programmaticFocusCount--;
2754 }
2755
2756 - (BOOL)_isPerformingProgrammaticFocus
2757 {
2758     return _private->programmaticFocusCount != 0;
2759 }
2760
2761 #if !PLATFORM(IOS)
2762 - (void)_didChangeValueForKey: (NSString *)key
2763 {
2764     LOG (Bindings, "calling didChangeValueForKey: %@", key);
2765     [self didChangeValueForKey: key];
2766 }
2767
2768 - (void)_willChangeValueForKey: (NSString *)key
2769 {
2770     LOG (Bindings, "calling willChangeValueForKey: %@", key);
2771     [self willChangeValueForKey: key];
2772 }
2773
2774 + (BOOL)automaticallyNotifiesObserversForKey:(NSString *)key {
2775     static NSSet *manualNotifyKeys = nil;
2776     if (!manualNotifyKeys)
2777         manualNotifyKeys = [[NSSet alloc] initWithObjects:_WebMainFrameURLKey, _WebIsLoadingKey, _WebEstimatedProgressKey,
2778             _WebCanGoBackKey, _WebCanGoForwardKey, _WebMainFrameTitleKey, _WebMainFrameIconKey, _WebMainFrameDocumentKey,
2779             nil];
2780     if ([manualNotifyKeys containsObject:key])
2781         return NO;
2782     return YES;
2783 }
2784
2785 - (NSArray *)_declaredKeys {
2786     static NSArray *declaredKeys = nil;
2787     if (!declaredKeys)
2788         declaredKeys = [[NSArray alloc] initWithObjects:_WebMainFrameURLKey, _WebIsLoadingKey, _WebEstimatedProgressKey,
2789             _WebCanGoBackKey, _WebCanGoForwardKey, _WebMainFrameTitleKey, _WebMainFrameIconKey, _WebMainFrameDocumentKey, nil];
2790     return declaredKeys;
2791 }
2792
2793 - (void)setObservationInfo:(void *)info
2794 {
2795     _private->observationInfo = info;
2796 }
2797
2798 - (void *)observationInfo
2799 {
2800     return _private->observationInfo;
2801 }
2802
2803 - (void)_willChangeBackForwardKeys
2804 {
2805     [self _willChangeValueForKey: _WebCanGoBackKey];
2806     [self _willChangeValueForKey: _WebCanGoForwardKey];
2807 }
2808
2809 - (void)_didChangeBackForwardKeys
2810 {
2811     [self _didChangeValueForKey: _WebCanGoBackKey];
2812     [self _didChangeValueForKey: _WebCanGoForwardKey];
2813 }
2814
2815 - (void)_didStartProvisionalLoadForFrame:(WebFrame *)frame
2816 {
2817     if (needsSelfRetainWhileLoadingQuirk())
2818         [self retain];
2819
2820     [self _willChangeBackForwardKeys];
2821     if (frame == [self mainFrame]){
2822         // Force an observer update by sending a will/did.
2823         [self _willChangeValueForKey: _WebIsLoadingKey];
2824         [self _didChangeValueForKey: _WebIsLoadingKey];
2825
2826         [self _willChangeValueForKey: _WebMainFrameURLKey];
2827     }
2828
2829     [NSApp setWindowsNeedUpdate:YES];
2830
2831 #if ENABLE(FULLSCREEN_API)
2832     Document* document = core([frame DOMDocument]);
2833     if (Element* element = document ? document->webkitCurrentFullScreenElement() : 0) {
2834         SEL selector = @selector(webView:closeFullScreenWithListener:);
2835         if (_private->UIDelegate && [_private->UIDelegate respondsToSelector:selector]) {
2836             WebKitFullScreenListener *listener = [[WebKitFullScreenListener alloc] initWithElement:element];
2837             CallUIDelegate(self, selector, listener);
2838             [listener release];
2839         } else if (_private->newFullscreenController && [_private->newFullscreenController isFullScreen]) {
2840             [_private->newFullscreenController close];
2841         }
2842     }
2843 #endif
2844 }
2845
2846 - (void)_checkDidPerformFirstNavigation
2847 {
2848     if (_private->_didPerformFirstNavigation)
2849         return;
2850
2851     Page* page = _private->page;
2852     if (!page)
2853         return;
2854
2855     auto& backForwardController = page->backForward();
2856
2857     if (!backForwardController.backItem())
2858         return;
2859
2860     _private->_didPerformFirstNavigation = YES;
2861
2862     if (_private->preferences.automaticallyDetectsCacheModel && _private->preferences.cacheModel < WebCacheModelDocumentBrowser)
2863         _private->preferences.cacheModel = WebCacheModelDocumentBrowser;
2864 }
2865
2866 - (void)_didCommitLoadForFrame:(WebFrame *)frame
2867 {
2868     if (frame == [self mainFrame])
2869         [self _didChangeValueForKey: _WebMainFrameURLKey];
2870
2871     [self _checkDidPerformFirstNavigation];
2872
2873     [NSApp setWindowsNeedUpdate:YES];
2874 }
2875
2876 - (void)_didFinishLoadForFrame:(WebFrame *)frame
2877 {
2878     if (needsSelfRetainWhileLoadingQuirk())
2879         [self performSelector:@selector(release) withObject:nil afterDelay:0];
2880         
2881     [self _didChangeBackForwardKeys];
2882     if (frame == [self mainFrame]){
2883         // Force an observer update by sending a will/did.
2884         [self _willChangeValueForKey: _WebIsLoadingKey];
2885         [self _didChangeValueForKey: _WebIsLoadingKey];
2886     }
2887     [NSApp setWindowsNeedUpdate:YES];
2888 }
2889
2890 - (void)_didFailLoadWithError:(NSError *)error forFrame:(WebFrame *)frame
2891 {
2892     if (needsSelfRetainWhileLoadingQuirk())
2893         [self performSelector:@selector(release) withObject:nil afterDelay:0];
2894
2895     [self _didChangeBackForwardKeys];
2896     if (frame == [self mainFrame]){
2897         // Force an observer update by sending a will/did.
2898         [self _willChangeValueForKey: _WebIsLoadingKey];
2899         [self _didChangeValueForKey: _WebIsLoadingKey];
2900     }
2901     [NSApp setWindowsNeedUpdate:YES];
2902 }
2903
2904 - (void)_didFailProvisionalLoadWithError:(NSError *)error forFrame:(WebFrame *)frame
2905 {
2906     if (needsSelfRetainWhileLoadingQuirk())
2907         [self performSelector:@selector(release) withObject:nil afterDelay:0];
2908
2909     [self _didChangeBackForwardKeys];
2910     if (frame == [self mainFrame]){
2911         // Force an observer update by sending a will/did.
2912         [self _willChangeValueForKey: _WebIsLoadingKey];
2913         [self _didChangeValueForKey: _WebIsLoadingKey];
2914         
2915         [self _didChangeValueForKey: _WebMainFrameURLKey];
2916     }
2917     [NSApp setWindowsNeedUpdate:YES];
2918 }
2919
2920 - (NSCachedURLResponse *)_cachedResponseForURL:(NSURL *)URL
2921 {
2922     RetainPtr<NSMutableURLRequest *> request = adoptNS([[NSMutableURLRequest alloc] initWithURL:URL]);
2923     [request _web_setHTTPUserAgent:[self userAgentForURL:URL]];
2924     NSCachedURLResponse *cachedResponse;
2925
2926     if (!_private->page)
2927         return nil;
2928
2929     if (CFURLStorageSessionRef storageSession = _private->page->mainFrame().loader().networkingContext()->storageSession().platformSession())
2930         cachedResponse = WKCachedResponseForRequest(storageSession, request.get());
2931     else
2932         cachedResponse = [[NSURLCache sharedURLCache] cachedResponseForRequest:request.get()];
2933
2934     return cachedResponse;
2935 }
2936
2937 - (void)_writeImageForElement:(NSDictionary *)element withPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard
2938 {
2939     NSURL *linkURL = [element objectForKey:WebElementLinkURLKey];
2940     DOMElement *domElement = [element objectForKey:WebElementDOMNodeKey];
2941     [pasteboard _web_writeImage:(NSImage *)(domElement ? nil : [element objectForKey:WebElementImageKey])
2942                         element:domElement
2943                             URL:linkURL ? linkURL : (NSURL *)[element objectForKey:WebElementImageURLKey]
2944                           title:[element objectForKey:WebElementImageAltStringKey] 
2945                         archive:[[element objectForKey:WebElementDOMNodeKey] webArchive]
2946                           types:types
2947                          source:nil];
2948 }
2949
2950 - (void)_writeLinkElement:(NSDictionary *)element withPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard
2951 {
2952     [pasteboard _web_writeURL:[element objectForKey:WebElementLinkURLKey]
2953                      andTitle:[element objectForKey:WebElementLinkLabelKey]
2954                         types:types];
2955 }
2956
2957 #if ENABLE(DRAG_SUPPORT)
2958 - (void)_setInitiatedDrag:(BOOL)initiatedDrag
2959 {
2960     if (!_private->page)
2961         return;
2962     _private->page->dragController().setDidInitiateDrag(initiatedDrag);
2963 }
2964 #endif
2965
2966 #else
2967
2968 - (void)_didCommitLoadForFrame:(WebFrame *)frame
2969 {
2970     if (frame == [self mainFrame])
2971         _private->didDrawTiles = 0;
2972 }
2973
2974 #endif // PLATFORM(IOS)
2975
2976 #if ENABLE(DASHBOARD_SUPPORT)
2977
2978 #define DASHBOARD_CONTROL_LABEL @"control"
2979
2980 - (void)_addControlRect:(NSRect)bounds clip:(NSRect)clip fromView:(NSView *)view toDashboardRegions:(NSMutableDictionary *)regions
2981 {
2982     NSRect adjustedBounds = bounds;
2983     adjustedBounds.origin = [self convertPoint:bounds.origin fromView:view];
2984     adjustedBounds.origin.y = [self bounds].size.height - adjustedBounds.origin.y;
2985     adjustedBounds.size = bounds.size;
2986
2987     NSRect adjustedClip;
2988     adjustedClip.origin = [self convertPoint:clip.origin fromView:view];
2989     adjustedClip.origin.y = [self bounds].size.height - adjustedClip.origin.y;
2990     adjustedClip.size = clip.size;
2991
2992     WebDashboardRegion *region = [[WebDashboardRegion alloc] initWithRect:adjustedBounds 
2993         clip:adjustedClip type:WebDashboardRegionTypeScrollerRectangle];
2994     NSMutableArray *scrollerRegions = [regions objectForKey:DASHBOARD_CONTROL_LABEL];
2995     if (!scrollerRegions) {
2996         scrollerRegions = [[NSMutableArray alloc] init];
2997         [regions setObject:scrollerRegions forKey:DASHBOARD_CONTROL_LABEL];
2998         [scrollerRegions release];
2999     }
3000     [scrollerRegions addObject:region];
3001     [region release];
3002 }
3003
3004 - (void)_addScrollerDashboardRegionsForFrameView:(FrameView*)frameView dashboardRegions:(NSMutableDictionary *)regions
3005 {    
3006     NSView *documentView = [[kit(&frameView->frame()) frameView] documentView];
3007
3008     for (const auto& widget: frameView->children()) {
3009         if (widget->isFrameView()) {
3010             [self _addScrollerDashboardRegionsForFrameView:toFrameView(widget.get()) dashboardRegions:regions];
3011             continue;
3012         }
3013
3014         if (!widget->isScrollbar())
3015             continue;
3016
3017         // FIXME: This should really pass an appropriate clip, but our first try got it wrong, and
3018         // it's not common to need this to be correct in Dashboard widgets.
3019         NSRect bounds = widget->frameRect();
3020         [self _addControlRect:bounds clip:bounds fromView:documentView toDashboardRegions:regions];
3021     }
3022 }
3023
3024 - (void)_addScrollerDashboardRegions:(NSMutableDictionary *)regions from:(NSArray *)views
3025 {
3026     // Add scroller regions for NSScroller and WebCore scrollbars
3027     NSUInteger count = [views count];
3028     for (NSUInteger i = 0; i < count; i++) {
3029         NSView *view = [views objectAtIndex:i];
3030         
3031         if ([view isKindOfClass:[WebHTMLView class]]) {
3032             if (Frame* coreFrame = core([(WebHTMLView*)view _frame])) {
3033                 if (FrameView* coreView = coreFrame->view())
3034                     [self _addScrollerDashboardRegionsForFrameView:coreView dashboardRegions:regions];
3035             }
3036         } else if ([view isKindOfClass:[NSScroller class]]) {
3037             // AppKit places absent scrollers at -100,-100
3038             if ([view frame].origin.y < 0)
3039                 continue;
3040             [self _addControlRect:[view bounds] clip:[view visibleRect] fromView:view toDashboardRegions:regions];
3041         }
3042         [self _addScrollerDashboardRegions:regions from:[view subviews]];
3043     }
3044 }
3045
3046 - (void)_addScrollerDashboardRegions:(NSMutableDictionary *)regions
3047 {
3048     [self _addScrollerDashboardRegions:regions from:[self subviews]];
3049 }
3050
3051 - (NSDictionary *)_dashboardRegions
3052 {
3053     // Only return regions from main frame.
3054     Frame* mainFrame = [self _mainCoreFrame];
3055     if (!mainFrame)
3056         return nil;
3057
3058     const Vector<AnnotatedRegionValue>& regions = mainFrame->document()->annotatedRegions();
3059     size_t size = regions.size();
3060
3061     NSMutableDictionary *webRegions = [NSMutableDictionary dictionaryWithCapacity:size];
3062     for (size_t i = 0; i < size; i++) {
3063         const AnnotatedRegionValue& region = regions[i];
3064
3065         if (region.type == StyleDashboardRegion::None)
3066             continue;
3067
3068         NSString *label = region.label;
3069         WebDashboardRegionType type = WebDashboardRegionTypeNone;
3070         if (region.type == StyleDashboardRegion::Circle)
3071             type = WebDashboardRegionTypeCircle;
3072         else if (region.type == StyleDashboardRegion::Rectangle)
3073             type = WebDashboardRegionTypeRectangle;
3074         NSMutableArray *regionValues = [webRegions objectForKey:label];
3075         if (!regionValues) {
3076             regionValues = [[NSMutableArray alloc] initWithCapacity:1];
3077             [webRegions setObject:regionValues forKey:label];
3078             [regionValues release];
3079         }
3080
3081         WebDashboardRegion *webRegion = [[WebDashboardRegion alloc] initWithRect:pixelSnappedIntRect(region.bounds) clip:pixelSnappedIntRect(region.clip) type:type];
3082         [regionValues addObject:webRegion];
3083         [webRegion release];
3084     }
3085
3086     [self _addScrollerDashboardRegions:webRegions];
3087
3088     return webRegions;
3089 }
3090
3091 - (void)_setDashboardBehavior:(WebDashboardBehavior)behavior to:(BOOL)flag
3092 {
3093     // FIXME: Remove this blanket assignment once Dashboard and Dashcode implement 
3094     // specific support for the backward compatibility mode flag.
3095     if (behavior == WebDashboardBehaviorAllowWheelScrolling && flag == NO && _private->page)
3096         _private->page->settings().setUsesDashboardBackwardCompatibilityMode(true);
3097     
3098     switch (behavior) {
3099         case WebDashboardBehaviorAlwaysSendMouseEventsToAllWindows: {
3100             _private->dashboardBehaviorAlwaysSendMouseEventsToAllWindows = flag;
3101             break;
3102         }
3103         case WebDashboardBehaviorAlwaysSendActiveNullEventsToPlugIns: {
3104             _private->dashboardBehaviorAlwaysSendActiveNullEventsToPlugIns = flag;
3105             break;
3106         }
3107         case WebDashboardBehaviorAlwaysAcceptsFirstMouse: {
3108             _private->dashboardBehaviorAlwaysAcceptsFirstMouse = flag;
3109             break;
3110         }
3111         case WebDashboardBehaviorAllowWheelScrolling: {
3112             _private->dashboardBehaviorAllowWheelScrolling = flag;
3113             break;
3114         }
3115         case WebDashboardBehaviorUseBackwardCompatibilityMode: {
3116             if (_private->page)
3117                 _private->page->settings().setUsesDashboardBackwardCompatibilityMode(flag);
3118 #if ENABLE(LEGACY_CSS_VENDOR_PREFIXES)
3119             RuntimeEnabledFeatures::sharedFeatures().setLegacyCSSVendorPrefixesEnabled(flag);
3120 #endif
3121             break;
3122         }
3123     }
3124
3125     // Pre-HTML5 parser quirks should be enabled if Dashboard is in backward
3126     // compatibility mode. See <rdar://problem/8175982>.
3127     if (_private->page)
3128         _private->page->settings().setUsePreHTML5ParserQuirks([self _needsPreHTML5ParserQuirks]);
3129 }
3130
3131 - (BOOL)_dashboardBehavior:(WebDashboardBehavior)behavior
3132 {
3133     switch (behavior) {
3134         case WebDashboardBehaviorAlwaysSendMouseEventsToAllWindows: {
3135             return _private->dashboardBehaviorAlwaysSendMouseEventsToAllWindows;
3136         }
3137         case WebDashboardBehaviorAlwaysSendActiveNullEventsToPlugIns: {
3138             return _private->dashboardBehaviorAlwaysSendActiveNullEventsToPlugIns;
3139         }
3140         case WebDashboardBehaviorAlwaysAcceptsFirstMouse: {
3141             return _private->dashboardBehaviorAlwaysAcceptsFirstMouse;
3142         }
3143         case WebDashboardBehaviorAllowWheelScrolling: {
3144             return _private->dashboardBehaviorAllowWheelScrolling;
3145         }
3146         case WebDashboardBehaviorUseBackwardCompatibilityMode: {
3147             return _private->page && _private->page->settings().usesDashboardBackwardCompatibilityMode();
3148         }
3149     }
3150     return NO;
3151 }
3152
3153 #endif /* ENABLE(DASHBOARD_SUPPORT) */
3154
3155 + (void)_setShouldUseFontSmoothing:(BOOL)f
3156 {
3157     Font::setShouldUseSmoothing(f);
3158 }
3159
3160 + (BOOL)_shouldUseFontSmoothing
3161 {
3162     return Font::shouldUseSmoothing();
3163 }
3164
3165 #if !PLATFORM(IOS)
3166 + (void)_setUsesTestModeFocusRingColor:(BOOL)f
3167 {
3168     setUsesTestModeFocusRingColor(f);
3169 }
3170
3171 + (BOOL)_usesTestModeFocusRingColor
3172 {
3173     return usesTestModeFocusRingColor();
3174 }
3175 #endif
3176
3177 #if PLATFORM(IOS)
3178 - (void)_setUIKitDelegate:(id)delegate
3179 {
3180     _private->UIKitDelegate = delegate;
3181     [_private->UIKitDelegateForwarder clearTarget];
3182     [_private->UIKitDelegateForwarder release];
3183     _private->UIKitDelegateForwarder = nil;
3184 }
3185
3186 - (id)_UIKitDelegate
3187 {
3188     return _private->UIKitDelegate;
3189 }
3190
3191 - (void)setWebMailDelegate:(id)delegate
3192 {
3193     _private->WebMailDelegate = delegate;
3194 }
3195
3196 - (id)_webMailDelegate
3197 {
3198     return _private->WebMailDelegate;
3199 }
3200
3201 - (id <WebCaretChangeListener>)caretChangeListener
3202 {
3203     return _private->_caretChangeListener;
3204 }
3205
3206 - (void)setCaretChangeListener:(id <WebCaretChangeListener>)listener
3207 {
3208     _private->_caretChangeListener = listener;
3209 }
3210
3211 - (NSSet *)caretChangeListeners
3212 {
3213     return _private->_caretChangeListeners;
3214 }
3215
3216 - (void)addCaretChangeListener:(id <WebCaretChangeListener>)listener
3217 {
3218     if (_private->_caretChangeListeners == nil) {
3219         _private->_caretChangeListeners = [[NSMutableSet alloc] init];
3220     }
3221     
3222     [_private->_caretChangeListeners addObject:listener];
3223 }
3224
3225 - (void)removeCaretChangeListener:(id <WebCaretChangeListener>)listener
3226 {
3227     [_private->_caretChangeListeners removeObject:listener];
3228 }
3229
3230 - (void)removeAllCaretChangeListeners
3231 {
3232     [_private->_caretChangeListeners removeAllObjects];
3233 }
3234
3235 - (void)caretChanged
3236 {
3237     [_private->_caretChangeListener caretChanged];
3238     NSSet *copy = [_private->_caretChangeListeners copy];
3239     for (id <WebCaretChangeListener> listener in copy) {
3240         [listener caretChanged];
3241     }
3242     [copy release];
3243 }
3244
3245 - (void)_clearDelegates
3246 {
3247     ASSERT(WebThreadIsLocked() || !WebThreadIsEnabled());
3248     
3249     [self _setFormDelegate:nil];
3250     [self _setUIKitDelegate:nil];
3251     [self setCaretChangeListener:nil];
3252     [self removeAllCaretChangeListeners];
3253     [self setWebMailDelegate:nil];
3254     
3255     [self setDownloadDelegate:nil];
3256     [self setEditingDelegate:nil]; 
3257     [self setFrameLoadDelegate:nil];
3258     [self setPolicyDelegate:nil];
3259     [self setResourceLoadDelegate:nil];
3260     [self setScriptDebugDelegate:nil];
3261     [self setUIDelegate:nil];     
3262 }
3263
3264 - (NSURL *)_displayURL
3265 {
3266     WebThreadLock();
3267     WebFrame *frame = [self mainFrame];
3268     // FIXME: <rdar://problem/6362369> We used to get provisionalDataSource here if in provisional state; how do we tell that now? Is this right?
3269     WebDataSource *dataSource = [frame provisionalDataSource];
3270     if (!dataSource)
3271         dataSource = [frame dataSource];
3272     NSURL *unreachableURL = [dataSource unreachableURL];
3273     NSURL *URL = unreachableURL != nil ? unreachableURL : [[dataSource request] URL];
3274     [[URL retain] autorelease];
3275     return URL;
3276 }
3277 #endif // PLATFORM(IOS)
3278
3279 #if !PLATFORM(IOS)
3280 - (void)setAlwaysShowVerticalScroller:(BOOL)flag
3281 {
3282     WebDynamicScrollBarsView *scrollview = [[[self mainFrame] frameView] _scrollView];
3283     if (flag) {
3284         [scrollview setVerticalScrollingMode:ScrollbarAlwaysOn andLock:YES];
3285     } else {
3286         [scrollview setVerticalScrollingModeLocked:NO];
3287         [scrollview setVerticalScrollingMode:ScrollbarAuto andLock:NO];
3288     }
3289 }
3290
3291 - (BOOL)alwaysShowVerticalScroller
3292 {
3293     WebDynamicScrollBarsView *scrollview = [[[self mainFrame] frameView] _scrollView];
3294     return [scrollview verticalScrollingModeLocked] && [scrollview verticalScrollingMode] == ScrollbarAlwaysOn;
3295 }
3296
3297 - (void)setAlwaysShowHorizontalScroller:(BOOL)flag
3298 {
3299     WebDynamicScrollBarsView *scrollview = [[[self mainFrame] frameView] _scrollView];
3300     if (flag) {
3301         [scrollview setHorizontalScrollingMode:ScrollbarAlwaysOn andLock:YES];
3302     } else {
3303         [scrollview setHorizontalScrollingModeLocked:NO];
3304         [scrollview setHorizontalScrollingMode:ScrollbarAuto andLock:NO];
3305     }
3306 }
3307
3308 - (void)setProhibitsMainFrameScrolling:(BOOL)prohibits
3309 {
3310     if (Frame* mainFrame = [self _mainCoreFrame])
3311         mainFrame->view()->setProhibitsScrolling(prohibits);
3312 }
3313
3314 - (BOOL)alwaysShowHorizontalScroller
3315 {
3316     WebDynamicScrollBarsView *scrollview = [[[self mainFrame] frameView] _scrollView];
3317     return [scrollview horizontalScrollingModeLocked] && [scrollview horizontalScrollingMode] == ScrollbarAlwaysOn;
3318 }
3319 #endif // !PLATFORM(IOS)
3320
3321 - (void)_setUseFastImageScalingMode:(BOOL)flag
3322 {
3323     if (_private->page && _private->page->inLowQualityImageInterpolationMode() != flag) {
3324         _private->page->setInLowQualityImageInterpolationMode(flag);
3325         [self setNeedsDisplay:YES];
3326     }
3327 }
3328
3329 - (BOOL)_inFastImageScalingMode
3330 {
3331     if (_private->page)
3332         return _private->page->inLowQualityImageInterpolationMode();
3333     return NO;
3334 }
3335
3336 - (BOOL)_cookieEnabled
3337 {
3338     if (_private->page)
3339         return _private->page->settings().cookieEnabled();
3340     return YES;
3341 }
3342
3343 - (void)_setCookieEnabled:(BOOL)enable
3344 {
3345     if (_private->page)
3346         _private->page->settings().setCookieEnabled(enable);
3347 }
3348
3349 #if !PLATFORM(IOS)
3350 - (void)_setAdditionalWebPlugInPaths:(NSArray *)newPaths
3351 {
3352     if (!_private->pluginDatabase)
3353         _private->pluginDatabase = [[WebPluginDatabase alloc] init];
3354         
3355     [_private->pluginDatabase setPlugInPaths:newPaths];
3356     [_private->pluginDatabase refresh];
3357 }
3358 #endif
3359
3360 #if PLATFORM(IOS)
3361 - (BOOL)_locked_plugInsAreRunningInFrame:(WebFrame *)frame
3362 {
3363     // Ask plug-ins in this frame
3364     id <WebDocumentView> documentView = [[frame frameView] documentView];
3365     if (documentView && [documentView isKindOfClass:[WebHTMLView class]]) {
3366         if ([[(WebHTMLView *)documentView _pluginController] plugInsAreRunning])
3367             return YES;
3368     }
3369
3370     // Ask plug-ins in child frames
3371     NSArray *childFrames = [frame childFrames];
3372     unsigned childCount = [childFrames count];
3373     unsigned childIndex;
3374     for (childIndex = 0; childIndex < childCount; childIndex++) {
3375         if ([self _locked_plugInsAreRunningInFrame:[childFrames objectAtIndex:childIndex]])
3376             return YES;
3377     }
3378     
3379     return NO;
3380 }
3381
3382 - (BOOL)_pluginsAreRunning
3383 {
3384     WebThreadLock();
3385     return [self _locked_plugInsAreRunningInFrame:[self mainFrame]];
3386 }
3387
3388 - (void)_locked_recursivelyPerformPlugInSelector:(SEL)selector inFrame:(WebFrame *)frame
3389 {
3390     // Send the message to plug-ins in this frame
3391     id <WebDocumentView> documentView = [[frame frameView] documentView];
3392     if (documentView && [documentView isKindOfClass:[WebHTMLView class]])
3393         [[(WebHTMLView *)documentView _pluginController] performSelector:selector];
3394
3395     // Send the message to plug-ins in child frames
3396     NSArray *childFrames = [frame childFrames];
3397     unsigned childCount = [childFrames count];
3398     unsigned childIndex;
3399     for (childIndex = 0; childIndex < childCount; childIndex++) {
3400         [self _locked_recursivelyPerformPlugInSelector:selector inFrame:[childFrames objectAtIndex:childIndex]];
3401     }
3402 }
3403
3404 - (void)_destroyAllPlugIns
3405 {
3406     WebThreadLock();
3407     [self _locked_recursivelyPerformPlugInSelector:@selector(destroyAllPlugins) inFrame:[self mainFrame]];
3408 }
3409
3410 - (void)_clearBackForwardCache
3411 {
3412     WebThreadRun(^{
3413         WebKit::MemoryMeasure measurer("[WebView _clearBackForwardCache]");
3414         BackForwardList* bfList = core([self backForwardList]);
3415         if (!bfList)
3416             return;
3417
3418         BOOL didClearBFCache = bfList->clearAllPageCaches();
3419         if (WebKit::MemoryMeasure::isLoggingEnabled())
3420             NSLog(@"[WebView _clearBackForwardCache] %@ empty cache\n", (didClearBFCache ? @"DID" : @"did NOT"));
3421     });
3422 }
3423
3424 - (void)_startAllPlugIns
3425 {
3426     WebThreadLock();
3427     [self _locked_recursivelyPerformPlugInSelector:@selector(startAllPlugins) inFrame:[self mainFrame]];
3428 }
3429
3430 - (void)_stopAllPlugIns
3431 {
3432     WebThreadLock();
3433     [self _locked_recursivelyPerformPlugInSelector:@selector(stopAllPlugins) inFrame:[self mainFrame]];
3434 }
3435
3436 - (void)_stopAllPlugInsForPageCache
3437 {
3438     WebThreadLock();
3439     [self _locked_recursivelyPerformPlugInSelector:@selector(stopPluginsForPageCache) inFrame:[self mainFrame]];
3440 }
3441
3442 - (void)_restorePlugInsFromCache
3443 {
3444     WebThreadLock();
3445     [self _locked_recursivelyPerformPlugInSelector:@selector(restorePluginsFromCache) inFrame:[self mainFrame]];
3446 }
3447
3448 - (BOOL)_setMediaLayer:(CALayer*)layer forPluginView:(NSView*)pluginView
3449 {
3450     WebThreadLock();
3451
3452     Frame* mainCoreFrame = [self _mainCoreFrame];
3453     for (Frame* frame = mainCoreFrame; frame; frame = frame->tree().traverseNext()) {
3454         FrameView* coreView = frame ? frame->view() : 0;
3455         if (!coreView)
3456             continue;
3457
3458         // Get the GraphicsLayer for this widget.
3459         GraphicsLayer* layerForWidget = coreView->graphicsLayerForPlatformWidget(pluginView);
3460         if (!layerForWidget)
3461             continue;
3462         
3463         if (layerForWidget->contentsLayerForMedia() != layer) {
3464             layerForWidget->setContentsToMedia(layer);
3465             // We need to make sure the layer hierachy change is applied immediately.
3466             if (mainCoreFrame->view())
3467                 mainCoreFrame->view()->flushCompositingStateIncludingSubframes();
3468             return YES;
3469         }
3470     }
3471
3472     return NO;
3473 }
3474
3475 - (void)_setNeedsUnrestrictedGetMatchedCSSRules:(BOOL)flag
3476 {
3477     if (_private->page)
3478         _private->page->settings().setCrossOriginCheckInGetMatchedCSSRulesDisabled(flag);
3479 }
3480 #endif // PLATFORM(IOS)
3481
3482 - (void)_attachScriptDebuggerToAllFrames
3483 {
3484     for (Frame* frame = [self _mainCoreFrame]; frame; frame = frame->tree().traverseNext())
3485         [kit(frame) _attachScriptDebugger];
3486 }
3487
3488 - (void)_detachScriptDebuggerFromAllFrames
3489 {
3490     for (Frame* frame = [self _mainCoreFrame]; frame; frame = frame->tree().traverseNext())
3491         [kit(frame) _detachScriptDebugger];
3492 }
3493
3494 #if !PLATFORM(IOS)
3495 - (void)setBackgroundColor:(NSColor *)backgroundColor
3496 {
3497     if ([_private->backgroundColor isEqual:backgroundColor])
3498         return;
3499
3500     id old = _private->backgroundColor;
3501     _private->backgroundColor = [backgroundColor retain];
3502     [old release];
3503
3504     [[self mainFrame] _updateBackgroundAndUpdatesWhileOffscreen];
3505 }
3506
3507 - (NSColor *)backgroundColor
3508 {
3509     return _private->backgroundColor;
3510 }
3511 #else
3512 - (void)setBackgroundColor:(CGColorRef)backgroundColor
3513 {
3514    if (!backgroundColor || CFEqual(_private->backgroundColor, backgroundColor))
3515         return;
3516
3517     CFTypeRef old = _private->backgroundColor;
3518     CFRetain(backgroundColor);
3519     _private->backgroundColor = backgroundColor;
3520     CFRelease(old);
3521
3522     [[self mainFrame] _updateBackgroundAndUpdatesWhileOffscreen];
3523 }
3524
3525 - (CGColorRef)backgroundColor
3526 {
3527     return _private->backgroundColor;
3528 }
3529 #endif
3530
3531 - (BOOL)defersCallbacks
3532 {
3533     if (!_private->page)
3534         return NO;
3535     return _private->page->defersLoading();
3536 }
3537
3538 - (void)setDefersCallbacks:(BOOL)defer
3539 {
3540     if (!_private->page)
3541         return;
3542     return _private->page->setDefersLoading(defer);
3543 }
3544
3545 #if TARGET_OS_IPHONE && USE(QUICK_LOOK)
3546 - (NSDictionary *)quickLookContentForURL:(NSURL *)url
3547 {
3548     NSString *uti = qlPreviewConverterUTIForURL(url);
3549     if (!uti)
3550         return nil;
3551
3552     NSString *fileName = qlPreviewConverterFileNameForURL(url);
3553     if (!fileName)
3554         return nil;
3555
3556     return [NSDictionary dictionaryWithObjectsAndKeys: fileName, WebQuickLookFileNameKey, uti, WebQuickLookUTIKey, nil];
3557 }
3558 #endif
3559
3560 #if PLATFORM(IOS)
3561 - (BOOL)_isStopping
3562 {
3563     return _private->isStopping;
3564 }
3565
3566 - (BOOL)_isClosing
3567 {
3568     return _private->closing;
3569 }
3570
3571 + (NSArray *)_productivityDocumentMIMETypes
3572 {
3573 #if USE(QUICK_LOOK)
3574     return [QLPreviewGetSupportedMIMETypesSet() allObjects];
3575 #else
3576     return nil;
3577 #endif
3578 }
3579
3580 - (void)_setAllowsMessaging:(BOOL)aFlag
3581 {
3582     _private->allowsMessaging = aFlag;
3583 }
3584
3585 - (BOOL)_allowsMessaging
3586 {
3587     return _private->allowsMessaging;
3588 }
3589
3590 - (void)_setFixedLayoutSize:(CGSize)size
3591 {
3592     ASSERT(WebThreadIsLocked());
3593     _private->fixedLayoutSize = size;
3594     if (Frame* mainFrame = core([self mainFrame])) {
3595         IntSize newSize(size);
3596         mainFrame->view()->setFixedLayoutSize(newSize);
3597         mainFrame->view()->setUseFixedLayout(!newSize.isEmpty());
3598         [self setNeedsDisplay:YES];
3599     }
3600 }
3601
3602 - (CGSize)_fixedLayoutSize
3603 {
3604     return _private->fixedLayoutSize;
3605 }
3606
3607 - (void)_synchronizeCustomFixedPositionLayoutRect
3608 {
3609     ASSERT(WebThreadIsLocked());
3610
3611     IntRect newRect;
3612     {
3613         MutexLocker locker(_private->pendingFixedPositionLayoutRectMutex);
3614         if (CGRectIsNull(_private->pendingFixedPositionLayoutRect))
3615             return;
3616         newRect = enclosingIntRect(_private->pendingFixedPositionLayoutRect);
3617         _private->pendingFixedPositionLayoutRect = CGRectNull;
3618     }
3619
3620     if (Frame* mainFrame = core([self mainFrame]))
3621         mainFrame->view()->setCustomFixedPositionLayoutRect(newRect);
3622 }
3623
3624 - (void)_setCustomFixedPositionLayoutRectInWebThread:(CGRect)rect synchronize:(BOOL)synchronize
3625 {
3626     {
3627         MutexLocker locker(_private->pendingFixedPositionLayoutRectMutex);
3628         _private->pendingFixedPositionLayoutRect = rect;
3629     }
3630     if (!synchronize)
3631         return;
3632     WebThreadRun(^{
3633         [self _synchronizeCustomFixedPositionLayoutRect];
3634     });
3635 }
3636
3637 - (void)_setCustomFixedPositionLayoutRect:(CGRect)rect
3638 {
3639     ASSERT(WebThreadIsLocked());
3640     {
3641         MutexLocker locker(_private->pendingFixedPositionLayoutRectMutex);
3642         _private->pendingFixedPositionLayoutRect = rect;
3643     }
3644     [self _synchronizeCustomFixedPositionLayoutRect];
3645 }
3646
3647 - (BOOL)_fetchCustomFixedPositionLayoutRect:(NSRect*)rect
3648 {
3649     MutexLocker locker(_private->pendingFixedPositionLayoutRectMutex);
3650     if (CGRectIsNull(_private->pendingFixedPositionLayoutRect))
3651         return false;
3652
3653     *rect = _private->pendingFixedPositionLayoutRect;
3654     _private->pendingFixedPositionLayoutRect = CGRectNull;
3655     return true;
3656 }
3657
3658 - (void)_viewGeometryDidChange
3659 {
3660     ASSERT(WebThreadIsLocked());
3661     
3662     if (Frame* coreFrame = [self _mainCoreFrame])
3663         coreFrame->viewportOffsetChanged(Frame::IncrementalScrollOffset);
3664 }
3665
3666 - (void)_overflowScrollPositionChangedTo:(CGPoint)offset forNode:(DOMNode *)domNode isUserScroll:(BOOL)userScroll
3667 {
3668     // Find the frame
3669     Node* node = core(domNode);
3670     Frame* frame = node->document().frame();
3671     if (!frame)
3672         return;
3673
3674     frame->overflowScrollPositionChangedForNode(roundedIntPoint(offset), node, userScroll);
3675 }
3676
3677 + (void)_doNotStartObservingNetworkReachability
3678 {
3679     Settings::setShouldOptOutOfNetworkStateObservation(true);
3680 }
3681 #endif // PLATFORM(IOS)
3682
3683 #if ENABLE(TOUCH_EVENTS)
3684 - (NSArray *)_touchEventRegions
3685 {
3686     Frame* frame = [self _mainCoreFrame];
3687     if (!frame)
3688         return nil;
3689     
3690     Document* document = frame->document();
3691     if (!document)
3692         return nil;
3693
3694     Vector<IntRect> rects;
3695     document->getTouchRects(rects);
3696
3697     if (rects.size() == 0)
3698         return nil;
3699
3700     NSMutableArray *eventRegionArray = [[[NSMutableArray alloc] initWithCapacity:rects.size()] autorelease];
3701
3702     Vector<IntRect>::const_iterator end = rects.end();
3703     for (Vector<IntRect>::const_iterator it = rects.begin(); it != end; ++it) {
3704         const IntRect& rect = *it;
3705         if (rect.isEmpty())
3706             continue;
3707
3708         // The event region wants this points in this order:
3709         //  p2------p3
3710         //  |       |
3711         //  p1------p4
3712         //
3713         WebEventRegion *eventRegion = [[WebEventRegion alloc] initWithPoints:FloatPoint(rect.x(), rect.maxY())
3714                                                                             :FloatPoint(rect.x(), rect.y())
3715                                                                             :FloatPoint(rect.maxX(), rect.y())
3716                                                                             :FloatPoint(rect.maxX(), rect.maxY())];
3717         if (eventRegion) {
3718             [eventRegionArray addObject:eventRegion];
3719             [eventRegion release];
3720         }
3721     }
3722
3723     return eventRegionArray;
3724 }
3725 #endif // ENABLE(TOUCH_EVENTS)
3726
3727 // For backwards compatibility with the WebBackForwardList API, we honor both
3728 // a per-WebView and a per-preferences setting for whether to use the page cache.
3729
3730 - (BOOL)usesPageCache
3731 {
3732     return _private->usesPageCache && [[self preferences] usesPageCache];
3733 }
3734
3735 - (void)setUsesPageCache:(BOOL)usesPageCache
3736 {
3737     _private->usesPageCache = usesPageCache;
3738
3739     // Update our own settings and post the public notification only
3740     [self _preferencesChanged:[self preferences]];
3741     [[self preferences] _postPreferencesChangedAPINotification];
3742 }
3743
3744 - (WebHistoryItem *)_globalHistoryItem
3745 {
3746     if (!_private)
3747         return nil;
3748
3749     return kit(_private->_globalHistoryItem.get());
3750 }
3751
3752 - (void)_setGlobalHistoryItem:(HistoryItem*)historyItem
3753 {
3754     _private->_globalHistoryItem = historyItem;
3755 }
3756
3757 - (WebTextIterator *)textIteratorForRect:(NSRect)rect
3758 {
3759     IntPoint rectStart(rect.origin.x, rect.origin.y);
3760     IntPoint rectEnd(rect.origin.x + rect.size.width, rect.origin.y + rect.size.height);
3761     
3762     Frame* coreFrame = [self _mainCoreFrame];
3763     if (!coreFrame)
3764         return nil;
3765     
3766     VisibleSelection selectionInsideRect(coreFrame->visiblePositionForPoint(rectStart), coreFrame->visiblePositionForPoint(rectEnd));
3767     
3768     return [[[WebTextIterator alloc] initWithRange:kit(selectionInsideRect.toNormalizedRange().get())] autorelease];
3769 }
3770
3771 #if ENABLE(DASHBOARD_SUPPORT)
3772 - (void)handleAuthenticationForResource:(id)identifier challenge:(NSURLAuthenticationChallenge *)challenge fromDataSource:(WebDataSource *)dataSource 
3773 {
3774     NSWindow *window = [self hostWindow] ? [self hostWindow] : [self window]; 
3775     [[WebPanelAuthenticationHandler sharedHandler] startAuthentication:challenge window:window]; 
3776
3777 #endif
3778
3779 #if !PLATFORM(IOS)
3780 - (void)_clearUndoRedoOperations
3781 {
3782     if (!_private->page)
3783         return;
3784     _private->page->clearUndoRedoOperations();
3785 }
3786 #endif
3787
3788 - (void)_executeCoreCommandByName:(NSString *)name value:(NSString *)value
3789 {
3790     Frame* coreFrame = [self _mainCoreFrame];
3791     if (!coreFrame)
3792         return;
3793     coreFrame->editor().command(name).execute(value);
3794 }
3795
3796 - (void)_clearMainFrameName
3797 {
3798     _private->page->mainFrame().tree().clearName();
3799 }
3800
3801 - (void)setSelectTrailingWhitespaceEnabled:(BOOL)flag
3802 {
3803     if (_private->page->settings().selectTrailingWhitespaceEnabled() != flag) {
3804         _private->page->settings().setSelectTrailingWhitespaceEnabled(flag);
3805         [self setSmartInsertDeleteEnabled:!flag];
3806     }
3807 }
3808
3809 - (BOOL)isSelectTrailingWhitespaceEnabled
3810 {
3811     return _private->page->settings().selectTrailingWhitespaceEnabled();
3812 }
3813
3814 - (void)setMemoryCacheDelegateCallsEnabled:(BOOL)enabled
3815 {
3816     _private->page->setMemoryCacheClientCallsEnabled(enabled);
3817 }
3818
3819 - (BOOL)areMemoryCacheDelegateCallsEnabled
3820 {
3821     return _private->page->areMemoryCacheClientCallsEnabled();
3822 }
3823
3824 #if !PLATFORM(IOS)
3825 + (NSCursor *)_pointingHandCursor
3826 {
3827     return handCursor().platformCursor();
3828 }
3829 #endif
3830
3831 - (BOOL)_postsAcceleratedCompositingNotifications
3832 {
3833     return _private->postsAcceleratedCompositingNotifications;
3834 }
3835 - (void)_setPostsAcceleratedCompositingNotifications:(BOOL)flag
3836 {
3837     _private->postsAcceleratedCompositingNotifications = flag;
3838 }
3839
3840 - (BOOL)_isUsingAcceleratedCompositing
3841 {
3842     Frame* coreFrame = [self _mainCoreFrame];
3843     for (Frame* frame = coreFrame; frame; frame = frame->tree().traverseNext(coreFrame)) {
3844         NSView *documentView = [[kit(frame) frameView] documentView];
3845         if ([documentView isKindOfClass:[WebHTMLView class]] && [(WebHTMLView *)documentView _isUsingAcceleratedCompositing])
3846             return YES;
3847     }
3848
3849     return NO;
3850 }
3851
3852 - (void)_setBaseCTM:(CGAffineTransform)transform forContext:(CGContextRef)context
3853 {
3854     WKSetBaseCTM(context, transform);
3855 }
3856
3857 - (BOOL)interactiveFormValidationEnabled
3858 {
3859     return _private->interactiveFormValidationEnabled;
3860 }
3861
3862 - (void)setInteractiveFormValidationEnabled:(BOOL)enabled
3863 {
3864     _private->interactiveFormValidationEnabled = enabled;
3865 }
3866
3867 - (int)validationMessageTimerMagnification
3868 {
3869     return _private->validationMessageTimerMagnification;
3870 }
3871
3872 - (void)setValidationMessageTimerMagnification:(int)newValue
3873 {
3874     _private->validationMessageTimerMagnification = newValue;
3875 }
3876
3877 - (BOOL)_isSoftwareRenderable
3878 {
3879     Frame* coreFrame = [self _mainCoreFrame];
3880     for (Frame* frame = coreFrame; frame; frame = frame->tree().traverseNext(coreFrame)) {
3881         if (FrameView* view = frame->view()) {
3882             if (!view->isSoftwareRenderable())
3883                 return NO;
3884         }
3885     }
3886
3887     return YES;
3888 }
3889
3890 - (void)_setIncludesFlattenedCompositingLayersWhenDrawingToBitmap:(BOOL)flag
3891 {
3892     _private->includesFlattenedCompositingLayersWhenDrawingToBitmap = flag;
3893 }
3894
3895 - (BOOL)_includesFlattenedCompositingLayersWhenDrawingToBitmap
3896 {
3897     return _private->includesFlattenedCompositingLayersWhenDrawingToBitmap;
3898 }
3899
3900 - (void)setTracksRepaints:(BOOL)flag
3901 {
3902     Frame* coreFrame = [self _mainCoreFrame];
3903     if (FrameView* view = coreFrame->view())
3904         view->setTracksRepaints(flag);
3905 }
3906
3907 - (BOOL)isTrackingRepaints
3908 {
3909     Frame* coreFrame = [self _mainCoreFrame];
3910     if (FrameView* view = coreFrame->view())
3911         return view->isTrackingRepaints();
3912     
3913     return NO;
3914 }
3915
3916 - (void)resetTrackedRepaints
3917 {
3918     Frame* coreFrame = [self _mainCoreFrame];
3919     if (FrameView* view = coreFrame->view())
3920         view->resetTrackedRepaints();
3921 }
3922
3923 - (NSArray*)trackedRepaintRects
3924 {
3925     Frame* coreFrame = [self _mainCoreFrame];
3926     FrameView* view = coreFrame->view();
3927     if (!view || !view->isTrackingRepaints())
3928         return nil;
3929
3930     const Vector<FloatRect>& repaintRects = view->trackedRepaintRects();
3931     NSMutableArray* rectsArray = [[NSMutableArray alloc] initWithCapacity:repaintRects.size()];
3932     
3933     for (unsigned i = 0; i < repaintRects.size(); ++i)
3934         [rectsArray addObject:[NSValue valueWithRect:pixelSnappedIntRect(LayoutRect(repaintRects[i]))]];
3935
3936     return [rectsArray autorelease];
3937 }
3938
3939 #if !PLATFORM(IOS)
3940 - (NSPasteboard *)_insertionPasteboard
3941 {
3942     return _private ? _private->insertionPasteboard : nil;
3943 }
3944 #endif
3945
3946 + (void)_addOriginAccessWhitelistEntryWithSourceOrigin:(NSString *)sourceOrigin destinationProtocol:(NSString *)destinationProtocol destinationHost:(NSString *)destinationHost allowDestinationSubdomains:(BOOL)allowDestinationSubdomains
3947 {
3948     SecurityPolicy::addOriginAccessWhitelistEntry(*SecurityOrigin::createFromString(sourceOrigin), destinationProtocol, destinationHost, allowDestinationSubdomains);
3949 }
3950
3951 + (void)_removeOriginAccessWhitelistEntryWithSourceOrigin:(NSString *)sourceOrigin destinationProtocol:(NSString *)destinationProtocol destinationHost:(NSString *)destinationHost allowDestinationSubdomains:(BOOL)allowDestinationSubdomains
3952 {
3953     SecurityPolicy::removeOriginAccessWhitelistEntry(*SecurityOrigin::createFromString(sourceOrigin), destinationProtocol, destinationHost, allowDestinationSubdomains);
3954 }
3955
3956 + (void)_resetOriginAccessWhitelists
3957 {
3958     SecurityPolicy::resetOriginAccessWhitelists();
3959 }
3960
3961 - (BOOL)_isViewVisible
3962 {
3963     if (![self window])
3964         return false;
3965
3966     if (![[self window] isVisible])
3967         return false;
3968
3969     if ([self isHiddenOrHasHiddenAncestor])
3970         return false;
3971
3972     return true;
3973 }
3974
3975 - (void)_updateVisibilityState
3976 {
3977     if (_private && _private->page)
3978         [self _setIsVisible:[self _isViewVisible]];
3979 }
3980
3981 - (void)_updateActiveState
3982 {
3983     if (_private && _private->page)
3984 #if PLATFORM(IOS)
3985         _private->page->focusController().setActive([[self window] isKeyWindow]);
3986 #else
3987         _private->page->focusController().setActive([[self window] _hasKeyAppearance]);
3988 #endif
3989 }
3990
3991 static Vector<String> toStringVector(NSArray* patterns)
3992 {
3993     Vector<String> patternsVector;
3994
3995     NSUInteger count = [patterns count];
3996     if (!count)
3997         return patternsVector;
3998
3999     for (NSUInteger i = 0; i < count; ++i) {
4000         id entry = [patterns objectAtIndex:i];
4001         if ([entry isKindOfClass:[NSString class]])
4002             patternsVector.append(String((NSString *)entry));
4003     }
4004     return patternsVector;
4005 }
4006
4007 + (void)_addUserScriptToGroup:(NSString *)groupName world:(WebScriptWorld *)world source:(NSString *)source url:(NSURL *)url
4008                     whitelist:(NSArray *)whitelist blacklist:(NSArray *)blacklist
4009                 injectionTime:(WebUserScriptInjectionTime)injectionTime
4010 {
4011     [WebView _addUserScriptToGroup:groupName world:world source:source url:url whitelist:whitelist blacklist:blacklist injectionTime:injectionTime injectedFrames:WebInjectInAllFrames];
4012 }
4013
4014 + (void)_addUserScriptToGroup:(NSString *)groupName world:(WebScriptWorld *)world source:(NSString *)source url:(NSURL *)url
4015                     whitelist:(NSArray *)whitelist blacklist:(NSArray *)blacklist
4016                 injectionTime:(WebUserScriptInjectionTime)injectionTime
4017                injectedFrames:(WebUserContentInjectedFrames)injectedFrames
4018 {
4019     String group(groupName);
4020     if (group.isEmpty())
4021         return;
4022     
4023     PageGroup* pageGroup = PageGroup::pageGroup(group);
4024     if (!pageGroup)
4025         return;
4026
4027     if (!world)
4028         return;
4029
4030     pageGroup->addUserScriptToWorld(*core(world), source, url, toStringVector(whitelist), toStringVector(blacklist),
4031                                     injectionTime == WebInjectAtDocumentStart ? InjectAtDocumentStart : InjectAtDocumentEnd,
4032                                     injectedFrames == WebInjectInAllFrames ? InjectInAllFrames : InjectInTopFrameOnly);
4033 }
4034
4035 + (void)_addUserStyleSheetToGroup:(NSString *)groupName world:(WebScriptWorld *)world source:(NSString *)source url:(NSURL *)url
4036                         whitelist:(NSArray *)whitelist blacklist:(NSArray *)blacklist
4037 {
4038     [WebView _addUserStyleSheetToGroup:groupName world:world source:source url:url whitelist:whitelist blacklist:blacklist injectedFrames:WebInjectInAllFrames];
4039 }
4040
4041 + (void)_addUserStyleSheetToGroup:(NSString *)groupName world:(WebScriptWorld *)world source:(NSString *)source url:(NSURL *)url
4042                         whitelist:(NSArray *)whitelist blacklist:(NSArray *)blacklist
4043                    injectedFrames:(WebUserContentInjectedFrames)injectedFrames
4044 {
4045     String group(groupName);
4046     if (group.isEmpty())
4047         return;
4048     
4049     PageGroup* pageGroup = PageGroup::pageGroup(group);
4050     if (!pageGroup)
4051         return;
4052
4053     if (!world)
4054         return;
4055
4056     pageGroup->addUserStyleSheetToWorld(*core(world), source, url, toStringVector(whitelist), toStringVector(blacklist), injectedFrames == WebInjectInAllFrames ? InjectInAllFrames : InjectInTopFrameOnly);
4057 }
4058
4059 + (void)_removeUserScriptFromGroup:(NSString *)groupName world:(WebScriptWorld *)world url:(NSURL *)url
4060 {
4061     String group(groupName);
4062     if (group.isEmpty())
4063         return;
4064     
4065     PageGroup* pageGroup = PageGroup::pageGroup(group);
4066     if (!pageGroup)
4067         return;
4068
4069     if (!world)
4070         return;
4071
4072     pageGroup->removeUserScriptFromWorld(*core(world), url);
4073 }
4074
4075 + (void)_removeUserStyleSheetFromGroup:(NSString *)groupName world:(WebScriptWorld *)world url:(NSURL *)url
4076 {
4077     String group(groupName);
4078     if (group.isEmpty())
4079         return;
4080     
4081     PageGroup* pageGroup = PageGroup::pageGroup(group);
4082     if (!pageGroup)
4083         return;
4084
4085     if (!world)
4086         return;
4087
4088     pageGroup->removeUserStyleSheetFromWorld(*core(world), url);
4089 }
4090
4091 + (void)_removeUserScriptsFromGroup:(NSString *)groupName world:(WebScriptWorld *)world
4092 {
4093     String group(groupName);
4094     if (group.isEmpty())
4095         return;
4096     
4097     PageGroup* pageGroup = PageGroup::pageGroup(group);
4098     if (!pageGroup)
4099         return;
4100
4101     if (!world)
4102         return;
4103
4104     pageGroup->removeUserScriptsFromWorld(*core(world));
4105 }
4106
4107 + (void)_removeUserStyleSheetsFromGroup:(NSString *)groupName world:(WebScriptWorld *)world
4108 {
4109     String group(groupName);
4110     if (group.isEmpty())
4111         return;
4112     
4113     PageGroup* pageGroup = PageGroup::pageGroup(group);
4114     if (!pageGroup)
4115         return;
4116
4117     if (!world)
4118         return;
4119
4120     pageGroup->removeUserStyleSheetsFromWorld(*core(world));
4121 }
4122
4123 + (void)_removeAllUserContentFromGroup:(NSString *)groupName
4124 {
4125     String group(groupName);
4126     if (group.isEmpty())
4127         return;
4128     
4129     PageGroup* pageGroup = PageGroup::pageGroup(group);
4130     if (!pageGroup)
4131         return;
4132     
4133     pageGroup->removeAllUserContent();
4134 }
4135
4136 - (BOOL)allowsNewCSSAnimationsWhileSuspended
4137 {
4138     Frame* frame = core([self mainFrame]);
4139     if (frame)
4140         return frame->animation().allowsNewAnimationsWhileSuspended();
4141
4142     return false;
4143 }
4144
4145 - (void)setAllowsNewCSSAnimationsWhileSuspended:(BOOL)allowed
4146 {
4147     Frame* frame = core([self mainFrame]);
4148     if (frame)
4149         frame->animation().setAllowsNewAnimationsWhileSuspended(allowed);
4150 }
4151
4152 - (BOOL)cssAnimationsSuspended
4153 {
4154     // should ask the page!
4155     Frame* frame = core([self mainFrame]);
4156     if (frame)
4157         return frame->animation().isSuspended();
4158
4159     return false;
4160 }
4161
4162 - (void)setCSSAnimationsSuspended:(BOOL)suspended
4163 {
4164     Frame* frame = core([self mainFrame]);
4165     if (suspended == frame->animation().isSuspended())
4166         return;
4167         
4168     if (suspended)
4169         frame->animation().suspendAnimations();
4170     else
4171         frame->animation().resumeAnimations();
4172 }
4173
4174 + (void)_setDomainRelaxationForbidden:(BOOL)forbidden forURLScheme:(NSString *)scheme
4175 {
4176     SchemeRegistry::setDomainRelaxationForbiddenForURLScheme(forbidden, scheme);
4177 }
4178
4179 + (void)_registerURLSchemeAsSecure:(NSString *)scheme
4180 {
4181     SchemeRegistry::registerURLSchemeAsSecure(scheme);
4182 }
4183
4184 + (void)_registerURLSchemeAsAllowingLocalStorageAccessInPrivateBrowsing:(NSString *)scheme
4185 {
4186     SchemeRegistry::registerURLSchemeAsAllowingLocalStorageAccessInPrivateBrowsing(scheme);
4187 }
4188
4189 + (void)_registerURLSchemeAsAllowingDatabaseAccessInPrivateBrowsing:(NSString *)scheme
4190 {
4191     SchemeRegistry::registerURLSchemeAsAllowingDatabaseAccessInPrivateBrowsing(scheme);
4192 }
4193
4194 - (void)_scaleWebView:(float)scale atOrigin:(NSPoint)origin
4195 {
4196     _private->page->setPageScaleFactor(scale, IntPoint(origin));
4197 }
4198
4199 - (float)_viewScaleFactor
4200 {
4201     return _private->page->pageScaleFactor();
4202 }
4203
4204 - (void)_setUseFixedLayout:(BOOL)fixed
4205 {
4206     Frame* coreFrame = [self _mainCoreFrame];
4207     if (!coreFrame)
4208         return;
4209
4210     FrameView* view = coreFrame->view();
4211     if (!view)
4212         return;
4213
4214     view->setUseFixedLayout(fixed);
4215     if (!fixed)
4216         view->setFixedLayoutSize(IntSize());
4217 }
4218
4219 #if !PLATFORM(IOS)
4220 - (void)_setFixedLayoutSize:(NSSize)size
4221 {
4222     Frame* coreFrame = [self _mainCoreFrame];
4223     if (!coreFrame)
4224         return;
4225     
4226     FrameView* view = coreFrame->view();
4227     if (!view)
4228         return;
4229     
4230     view->setFixedLayoutSize(IntSize(size));
4231     view->forceLayout();
4232 }
4233 #endif
4234
4235 - (BOOL)_useFixedLayout
4236 {
4237     Frame* coreFrame = [self _mainCoreFrame];
4238     if (!coreFrame)
4239         return NO;
4240     
4241     FrameView* view = coreFrame->view();
4242     if (!view)
4243         return NO;
4244     
4245     return view->useFixedLayout();
4246 }
4247
4248 #if !PLATFORM(IOS)
4249 - (NSSize)_fixedLayoutSize
4250 {
4251     Frame* coreFrame = [self _mainCoreFrame];
4252     if (!coreFrame)
4253         return IntSize();
4254     
4255     FrameView* view = coreFrame->view();
4256     if (!view)
4257         return IntSize();
4258
4259     return view->fixedLayoutSize();
4260 }
4261 #endif
4262
4263 - (void)_setPaginationMode:(WebPaginationMode)paginationMode
4264 {
4265     Page* page = core(self);
4266     if (!page)
4267         return;
4268
4269     Pagination pagination = page->pagination();
4270     switch (paginationMode) {
4271     case WebPaginationModeUnpaginated:
4272         pagination.mode = Pagination::Unpaginated;
4273         break;