WebKit/WebView.subproj/WebHTMLView.m

   1 /*
   2     WebHTMLView.m
   3     Copyright 2002, Apple, Inc. All rights reserved.
   4 */
   5
   6 #import <WebKit/WebHTMLView.h>
   7
   8 #import <WebKit/DOM.h>
   9 #import <WebKit/DOMExtensions.h>
  10 #import <WebKit/DOMPrivate.h>
  11 #import <WebKit/WebArchive.h>
  12 #import <WebKit/WebBridge.h>
  13 #import <WebKit/WebClipView.h>
  14 #import <WebKit/WebDataProtocol.h>
  15 #import <WebKit/WebDataSourcePrivate.h>
  16 #import <WebKit/WebDocumentInternal.h>
  17 #import <WebKit/WebDOMOperationsPrivate.h>
  18 #import <WebKit/WebEditingDelegate.h>
  19 #import <WebKit/WebException.h>
  20 #import <WebKit/WebFramePrivate.h>
  21 #import <WebKit/WebFrameViewInternal.h>
  22 #import <WebKit/WebHTMLViewInternal.h>
  23 #import <WebKit/WebHTMLRepresentationPrivate.h>
  24 #import <WebKit/WebImageRenderer.h>
  25 #import <WebKit/WebImageRendererFactory.h>
  26 #import <WebKit/WebKitLogging.h>
  27 #import <WebKit/WebKitNSStringExtras.h>
  28 #import <WebKit/WebNetscapePluginEmbeddedView.h>
  29 #import <WebKit/WebNSEventExtras.h>
  30 #import <WebKit/WebNSImageExtras.h>
  31 #import <WebKit/WebNSObjectExtras.h>
  32 #import <WebKit/WebNSPasteboardExtras.h>
  33 #import <WebKit/WebNSPrintOperationExtras.h>
  34 #import <WebKit/WebNSURLExtras.h>
  35 #import <WebKit/WebNSViewExtras.h>
  36 #import <WebKit/WebPluginController.h>
  37 #import <WebKit/WebPreferences.h>
  38 #import <WebKit/WebPreferencesPrivate.h>
  39 #import <WebKit/WebResourcePrivate.h>
  40 #import <WebKit/WebStringTruncator.h>
  41 #import <WebKit/WebTextRenderer.h>
  42 #import <WebKit/WebTextRendererFactory.h>
  43 #import <WebKit/WebUIDelegatePrivate.h>
  44 #import <WebKit/WebUnicode.h>
  45 #import <WebKit/WebViewInternal.h>
  46 #import <WebKit/WebViewPrivate.h>
  47
  48 #import <AppKit/NSAccessibility.h>
  49 #import <AppKit/NSGraphicsContextPrivate.h>
  50 #import <AppKit/NSResponder_Private.h>
  51
  52 #import <Foundation/NSFileManager_NSURLExtras.h>
  53 #import <Foundation/NSURL_NSURLExtras.h>
  54 #import <Foundation/NSURLFileTypeMappings.h>
  55
  56 #import <CoreGraphics/CGContextGState.h>
  57
  58 // Included to help work around this bug:
  59 // <rdar://problem/3630640>: "Calling interpretKeyEvents: in a custom text view can fail to process keys right after app startup"
  60 #import <AppKit/NSKeyBindingManager.h>
  61
  62 // Included so usage of _NSSoftLinkingGetFrameworkFuncPtr will compile
  63 #import <mach-o/dyld.h>
  64
  65
  66 // need to declare this because AppKit does not make it available as API or SPI
  67 extern NSString *NSMarkedClauseSegmentAttributeName;
  68
  69 // Kill ring calls. Would be better to use NSKillRing.h, but that's not available in SPI.
  70 void _NSInitializeKillRing(void);
  71 void _NSAppendToKillRing(NSString *);
  72 void _NSPrependToKillRing(NSString *);
  73 NSString *_NSYankFromKillRing(void);
  74 NSString *_NSYankPreviousFromKillRing(void);
  75 void _NSNewKillRingSequence(void);
  76 void _NSSetKillRingToYankedState(void);
  77 void _NSResetKillRingOperationFlag(void);
  78
  79 @interface NSView (AppKitSecretsIKnowAbout)
  80 - (void)_recursiveDisplayRectIfNeededIgnoringOpacity:(NSRect)rect isVisibleRect:(BOOL)isVisibleRect rectIsVisibleRectForView:(NSView *)visibleView topView:(BOOL)topView;
  81 - (void)_recursiveDisplayAllDirtyWithLockFocus:(BOOL)needsLockFocus visRect:(NSRect)visRect;
  82 - (NSRect)_dirtyRect;
  83 - (void)_setDrawsOwnDescendants:(BOOL)drawsOwnDescendants;
  84 - (void)_propagateDirtyRectsToOpaqueAncestors;
  85 @end
  86
  87 @interface NSApplication (AppKitSecretsIKnowAbout)
  88 - (void)speakString:(NSString *)string;
  89 @end
  90
  91 @interface NSWindow (AppKitSecretsIKnowAbout)
  92 - (id)_newFirstResponderAfterResigning;
  93 @end
  94
  95 @interface NSAttributedString (AppKitSecretsIKnowAbout)
  96 - (id)_initWithDOMRange:(DOMRange *)domRange;
  97 - (DOMDocumentFragment *)_documentFromRange:(NSRange)range document:(DOMDocument *)document documentAttributes:(NSDictionary *)dict subresources:(NSArray **)subresources;
  98 @end
  99
 100 @interface NSSpellChecker (CurrentlyPrivateForTextView)
 101 - (void)learnWord:(NSString *)word;
 102 @end
 103
 104 // By imaging to a width a little wider than the available pixels,
 105 // thin pages will be scaled down a little, matching the way they
 106 // print in IE and Camino. This lets them use fewer sheets than they
 107 // would otherwise, which is presumably why other browsers do this.
 108 // Wide pages will be scaled down more than this.
 109 #define PrintingMinimumShrinkFactor     1.25
 110
 111 // This number determines how small we are willing to reduce the page content
 112 // in order to accommodate the widest line. If the page would have to be
 113 // reduced smaller to make the widest line fit, we just clip instead (this
 114 // behavior matches MacIE and Mozilla, at least)
 115 #define PrintingMaximumShrinkFactor     2.0
 116
 117 #define AUTOSCROLL_INTERVAL             0.1
 118
 119 #define DRAG_LABEL_BORDER_X             4.0
 120 #define DRAG_LABEL_BORDER_Y             2.0
 121 #define DRAG_LABEL_RADIUS               5.0
 122 #define DRAG_LABEL_BORDER_Y_OFFSET              2.0
 123
 124 #define MIN_DRAG_LABEL_WIDTH_BEFORE_CLIP        120.0
 125 #define MAX_DRAG_LABEL_WIDTH                    320.0
 126
 127 #define DRAG_LINK_LABEL_FONT_SIZE   11.0
 128 #define DRAG_LINK_URL_FONT_SIZE   10.0
 129
 130 #ifndef OMIT_TIGER_FEATURES
 131 #define USE_APPKIT_FOR_ATTRIBUTED_STRINGS
 132 #endif
 133
 134 // Any non-zero value will do, but using something recognizable might help us debug some day.
 135 #define TRACKING_RECT_TAG 0xBADFACE
 136
 137 // FIXME: This constant is copied from AppKit's _NXSmartPaste constant.
 138 #define WebSmartPastePboardType @"NeXT smart paste pasteboard type"
 139
 140 #define STANDARD_WEIGHT 5
 141 #define MIN_BOLD_WEIGHT 9
 142 #define STANDARD_BOLD_WEIGHT 10
 143
 144 typedef enum {
 145     deleteSelectionAction,
 146     deleteKeyAction,
 147     forwardDeleteKeyAction
 148 } WebDeletionAction;
 149
 150 static BOOL forceRealHitTest = NO;
 151
 152 // Used to avoid linking with ApplicationServices framework for _DCMDictionaryServiceWindowShow
 153 void *_NSSoftLinkingGetFrameworkFuncPtr(NSString *inUmbrellaFrameworkName,
 154                                         NSString *inFrameworkName,
 155                                         const char *inFuncName,
 156                                         const struct mach_header **ioCachedFrameworkImageHeaderPtr);
 157
 158
 159 @interface WebHTMLView (WebTextSizing) <_web_WebDocumentTextSizing>
 160 @end
 161
 162 @interface WebHTMLView (WebHTMLViewFileInternal)
 163 - (BOOL)_imageExistsAtPaths:(NSArray *)paths;
 164 - (DOMDocumentFragment *)_documentFragmentFromPasteboard:(NSPasteboard *)pasteboard allowPlainText:(BOOL)allowPlainText chosePlainText:(BOOL *)chosePlainText;
 165 - (void)_pasteWithPasteboard:(NSPasteboard *)pasteboard allowPlainText:(BOOL)allowPlainText;
 166 - (BOOL)_shouldInsertFragment:(DOMDocumentFragment *)fragment replacingDOMRange:(DOMRange *)range givenAction:(WebViewInsertAction)action;
 167 - (BOOL)_shouldReplaceSelectionWithText:(NSString *)text givenAction:(WebViewInsertAction)action;
 168 - (float)_calculatePrintHeight;
 169 - (void)_updateTextSizeMultiplier;
 170 - (DOMRange *)_selectedRange;
 171 - (BOOL)_shouldDeleteRange:(DOMRange *)range;
 172 - (void)_deleteRange:(DOMRange *)range
 173             killRing:(BOOL)killRing
 174              prepend:(BOOL)prepend
 175        smartDeleteOK:(BOOL)smartDeleteOK
 176       deletionAction:(WebDeletionAction)deletionAction;
 177 - (void)_deleteSelection;
 178 - (BOOL)_canSmartReplaceWithPasteboard:(NSPasteboard *)pasteboard;
 179 - (NSView *)_hitViewForEvent:(NSEvent *)event;
 180 - (void)_writeSelectionWithPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard cachedAttributedString:(NSAttributedString *)attributedString;
 181 @end
 182
 183 @interface WebHTMLView (WebForwardDeclaration) // FIXME: Put this in a normal category and stop doing the forward declaration trick.
 184 - (void)_setPrinting:(BOOL)printing minimumPageWidth:(float)minPageWidth maximumPageWidth:(float)maxPageWidth adjustViewSize:(BOOL)adjustViewSize;
 185 @end
 186
 187 @interface WebHTMLView (WebNSTextInputSupport) <NSTextInput>
 188 - (void)_updateSelectionForInputManager;
 189 - (void)_insertText:(NSString *)text selectInsertedText:(BOOL)selectText;
 190 @end
 191
 192 @interface WebHTMLView (WebEditingStyleSupport)
 193 - (DOMCSSStyleDeclaration *)_emptyStyle;
 194 - (NSString *)_colorAsString:(NSColor *)color;
 195 @end
 196
 197 @interface NSView (WebHTMLViewFileInternal)
 198 - (void)_web_setPrintingModeRecursive;
 199 - (void)_web_clearPrintingModeRecursive;
 200 - (void)_web_layoutIfNeededRecursive;
 201 - (void)_web_layoutIfNeededRecursive:(NSRect)rect testDirtyRect:(bool)testDirtyRect;
 202 @end
 203
 204 @interface NSMutableDictionary (WebHTMLViewFileInternal)
 205 - (void)_web_setObjectIfNotNil:(id)object forKey:(id)key;
 206 @end
 207
 208 // Handles the complete: text command
 209 @interface WebTextCompleteController : NSObject
 210 {
 211 @private
 212     WebHTMLView *_view;
 213     NSWindow *_popupWindow;
 214     NSTableView *_tableView;
 215     NSArray *_completions;
 216     NSString *_originalString;
 217     int prefixLength;
 218 }
 219 - (id)initWithHTMLView:(WebHTMLView *)view;
 220 - (void)doCompletion;
 221 - (void)endRevertingChange:(BOOL)revertChange moveLeft:(BOOL)goLeft;
 222 - (BOOL)filterKeyDown:(NSEvent *)event;
 223 - (void)_reflectSelection;
 224 @end
 225
 226 @implementation WebHTMLViewPrivate
 227
 228 - (void)dealloc
 229 {
 230     ASSERT(autoscrollTimer == nil);
 231     ASSERT(autoscrollTriggerEvent == nil);
 232
 233     [mouseDownEvent release];
 234     [draggingImageURL release];
 235     [pluginController release];
 236     [toolTip release];
 237     [compController release];
 238     [firstResponderAtMouseDownTime release];
 239
 240     [super dealloc];
 241 }
 242
 243 @end
 244
 245 @implementation WebHTMLView (WebHTMLViewFileInternal)
 246
 247 - (BOOL)_imageExistsAtPaths:(NSArray *)paths
 248 {
 249     NSURLFileTypeMappings *mappings = [NSURLFileTypeMappings sharedMappings];
 250     NSArray *imageMIMETypes = [[WebImageRendererFactory sharedFactory] supportedMIMETypes];
 251     NSEnumerator *enumerator = [paths objectEnumerator];
 252     NSString *path;
 253
 254     while ((path = [enumerator nextObject]) != nil) {
 255         NSString *MIMEType = [mappings MIMETypeForExtension:[path pathExtension]];
 256         if ([imageMIMETypes containsObject:MIMEType]) {
 257             return YES;
 258         }
 259     }
 260
 261     return NO;
 262 }
 263
 264 - (DOMDocumentFragment *)_documentFragmentWithPaths:(NSArray *)paths
 265 {
 266     DOMDocumentFragment *fragment = [[[self _bridge] DOMDocument] createDocumentFragment];
 267     NSURLFileTypeMappings *mappings = [NSURLFileTypeMappings sharedMappings];
 268     NSArray *imageMIMETypes = [[WebImageRendererFactory sharedFactory] supportedMIMETypes];
 269     NSEnumerator *enumerator = [paths objectEnumerator];
 270     WebDataSource *dataSource = [self _dataSource];
 271     NSString *path;
 272
 273     while ((path = [enumerator nextObject]) != nil) {
 274         NSString *MIMEType = [mappings MIMETypeForExtension:[path pathExtension]];
 275         if ([imageMIMETypes containsObject:MIMEType]) {
 276             WebResource *resource = [[WebResource alloc] initWithData:[NSData dataWithContentsOfFile:path]
 277                                                                   URL:[NSURL fileURLWithPath:path]
 278                                                              MIMEType:MIMEType
 279                                                      textEncodingName:nil
 280                                                             frameName:nil];
 281             if (resource) {
 282                 [fragment appendChild:[dataSource _imageElementWithImageResource:resource]];
 283                 [resource release];
 284             }
 285         }
 286     }
 287
 288     return [fragment firstChild] != nil ? fragment : nil;
 289 }
 290
 291 + (NSArray *)_excludedElementsForAttributedStringConversion
 292 {
 293     static NSArray *elements = nil;
 294     if (elements == nil) {
 295         elements = [[NSArray alloc] initWithObjects:
 296             // Omit style since we want style to be inline so the fragment can be easily inserted.
 297             @"style",
 298             // Omit xml so the result is not XHTML.
 299             @"xml",
 300             // Omit tags that will get stripped when converted to a fragment anyway.
 301             @"doctype", @"html", @"head", @"body",
 302             // Omit deprecated tags.
 303             @"applet", @"basefont", @"center", @"dir", @"font", @"isindex", @"menu", @"s", @"strike", @"u",
 304             // Omit object so no file attachments are part of the fragment.
 305             @"object", nil];
 306     }
 307     return elements;
 308 }
 309
 310 - (DOMDocumentFragment *)_documentFragmentFromPasteboard:(NSPasteboard *)pasteboard allowPlainText:(BOOL)allowPlainText chosePlainText:(BOOL *)chosePlainText
 311 {
 312     NSArray *types = [pasteboard types];
 313     *chosePlainText = NO;
 314
 315     if ([types containsObject:WebArchivePboardType]) {
 316         WebArchive *archive = [[WebArchive alloc] initWithData:[pasteboard dataForType:WebArchivePboardType]];
 317         if (archive) {
 318             DOMDocumentFragment *fragment = [[self _dataSource] _documentFragmentWithArchive:archive];
 319             [archive release];
 320             if (fragment) {
 321                 return fragment;
 322             }
 323         }
 324     }
 325
 326     if ([types containsObject:NSFilenamesPboardType]) {
 327         DOMDocumentFragment *fragment = [self _documentFragmentWithPaths:[pasteboard propertyListForType:NSFilenamesPboardType]];
 328         if (fragment != nil) {
 329             return fragment;
 330         }
 331     }
 332
 333     NSURL *URL;
 334
 335     if ([types containsObject:NSHTMLPboardType]) {
 336         NSString *HTMLString = [pasteboard stringForType:NSHTMLPboardType];
 337         // This is a hack to make Microsoft's HTML pasteboard data work. See 3778785.
 338         if ([HTMLString hasPrefix:@"Version:"]) {
 339             NSRange range = [HTMLString rangeOfString:@"<html" options:NSCaseInsensitiveSearch];
 340             if (range.location != NSNotFound) {
 341                 HTMLString = [HTMLString substringFromIndex:range.location];
 342             }
 343         }
 344         if ([HTMLString length] != 0) {
 345             return [[self _bridge] documentFragmentWithMarkupString:HTMLString baseURLString:nil];
 346         }
 347     }
 348
 349 #ifdef USE_APPKIT_FOR_ATTRIBUTED_STRINGS
 350     NSAttributedString *string = nil;
 351     if ([types containsObject:NSRTFDPboardType]) {
 352         string = [[NSAttributedString alloc] initWithRTFD:[pasteboard dataForType:NSRTFDPboardType] documentAttributes:NULL];
 353     }
 354     if (string == nil && [types containsObject:NSRTFPboardType]) {
 355         string = [[NSAttributedString alloc] initWithRTF:[pasteboard dataForType:NSRTFPboardType] documentAttributes:NULL];
 356     }
 357     if (string != nil) {
 358         NSDictionary *documentAttributes = [[NSDictionary alloc] initWithObjectsAndKeys:
 359             [[self class] _excludedElementsForAttributedStringConversion], NSExcludedElementsDocumentAttribute,
 360             self, @"WebResourceHandler", nil];
 361         NSArray *subresources;
 362         DOMDocumentFragment *fragment = [string _documentFromRange:NSMakeRange(0, [string length])
 363                                                           document:[[self _bridge] DOMDocument]
 364                                                 documentAttributes:documentAttributes
 365                                                       subresources:&subresources];
 366         [documentAttributes release];
 367         [string release];
 368         return fragment;
 369     }
 370 #endif
 371
 372     if ([types containsObject:NSTIFFPboardType]) {
 373         WebResource *resource = [[WebResource alloc] initWithData:[pasteboard dataForType:NSTIFFPboardType]
 374                                                               URL:[NSURL _web_uniqueWebDataURLWithRelativeString:@"/image.tiff"]
 375                                                          MIMEType:@"image/tiff"
 376                                                  textEncodingName:nil
 377                                                         frameName:nil];
 378         DOMDocumentFragment *fragment = [[self _dataSource] _documentFragmentWithImageResource:resource];
 379         [resource release];
 380         return fragment;
 381     }
 382
 383     if ([types containsObject:NSPICTPboardType]) {
 384         WebResource *resource = [[WebResource alloc] initWithData:[pasteboard dataForType:NSPICTPboardType]
 385                                                               URL:[NSURL _web_uniqueWebDataURLWithRelativeString:@"/image.pict"]
 386                                                          MIMEType:@"image/pict"
 387                                                  textEncodingName:nil
 388                                                         frameName:nil];
 389         DOMDocumentFragment *fragment = [[self _dataSource] _documentFragmentWithImageResource:resource];
 390         [resource release];
 391         return fragment;
 392     }
 393
 394     if ((URL = [NSURL URLFromPasteboard:pasteboard])) {
 395         NSString *URLString = [URL _web_userVisibleString];
 396         if ([URLString length] > 0) {
 397             return [[self _bridge] documentFragmentWithText:URLString];
 398         }
 399     }
 400
 401     if (allowPlainText && [types containsObject:NSStringPboardType]) {
 402         *chosePlainText = YES;
 403         return [[self _bridge] documentFragmentWithText:[pasteboard stringForType:NSStringPboardType]];
 404     }
 405
 406     return nil;
 407 }
 408
 409 #ifdef USE_APPKIT_FOR_ATTRIBUTED_STRINGS
 410 - (WebResource *)resourceForData:(NSData *)data preferredFilename:(NSString *)name
 411 {
 412     // This method is called by [NSAttributedString _documentFromRange::::]
 413     // which uses the URL of the resource for the fragment that it returns.
 414     NSString *extension = [name pathExtension];
 415     NSString *MIMEType = nil;
 416     if ([extension length] != 0) {
 417         MIMEType = [[NSURLFileTypeMappings sharedMappings] MIMETypeForExtension:extension];
 418     }
 419     // Only support image resources.
 420     if (MIMEType == nil || ![[[WebImageRendererFactory sharedFactory] supportedMIMETypes] containsObject:MIMEType]) {
 421         return nil;
 422     }
 423     NSURL *URL = [NSURL _web_URLWithUserTypedString:[NSString stringWithFormat:@"/%@", name] relativeToURL:[NSURL _web_uniqueWebDataURL]];
 424     WebResource *resource = [[[WebResource alloc] initWithData:data
 425                                                            URL:URL
 426                                                       MIMEType:MIMEType
 427                                               textEncodingName:nil
 428                                                      frameName:nil] autorelease];
 429     [[self _dataSource] addSubresource:resource];
 430     return resource;
 431 }
 432 #endif
 433
 434 - (void)_pasteWithPasteboard:(NSPasteboard *)pasteboard allowPlainText:(BOOL)allowPlainText
 435 {
 436     BOOL chosePlainText;
 437     DOMDocumentFragment *fragment = [self _documentFragmentFromPasteboard:pasteboard allowPlainText:allowPlainText chosePlainText:&chosePlainText];
 438     WebBridge *bridge = [self _bridge];
 439     if (fragment && [self _shouldInsertFragment:fragment replacingDOMRange:[self _selectedRange] givenAction:WebViewInsertActionPasted]) {
 440         [bridge replaceSelectionWithFragment:fragment selectReplacement:NO smartReplace:[self _canSmartReplaceWithPasteboard:pasteboard] matchStyle:chosePlainText];
 441     }
 442 }
 443
 444 - (BOOL)_shouldInsertFragment:(DOMDocumentFragment *)fragment replacingDOMRange:(DOMRange *)range givenAction:(WebViewInsertAction)action
 445 {
 446     WebView *webView = [self _webView];
 447     DOMNode *child = [fragment firstChild];
 448     if ([fragment lastChild] == child && [child isKindOfClass:[DOMCharacterData class]]) {
 449         return [[webView _editingDelegateForwarder] webView:webView shouldInsertText:[(DOMCharacterData *)child data] replacingDOMRange:range givenAction:action];
 450     } else {
 451         return [[webView _editingDelegateForwarder] webView:webView shouldInsertNode:fragment replacingDOMRange:range givenAction:action];
 452     }
 453 }
 454
 455 - (BOOL)_shouldReplaceSelectionWithText:(NSString *)text givenAction:(WebViewInsertAction)action
 456 {
 457     WebView *webView = [self _webView];
 458     DOMRange *selectedRange = [self _selectedRange];
 459     return [[webView _editingDelegateForwarder] webView:webView shouldInsertText:text replacingDOMRange:selectedRange givenAction:action];
 460 }
 461
 462 // Calculate the vertical size of the view that fits on a single page
 463 - (float)_calculatePrintHeight
 464 {
 465     // Obtain the print info object for the current operation
 466     NSPrintInfo *pi = [[NSPrintOperation currentOperation] printInfo];
 467
 468     // Calculate the page height in points
 469     NSSize paperSize = [pi paperSize];
 470     return paperSize.height - [pi topMargin] - [pi bottomMargin];
 471 }
 472
 473 - (void)_updateTextSizeMultiplier
 474 {
 475     [[self _bridge] setTextSizeMultiplier:[[self _webView] textSizeMultiplier]];
 476 }
 477
 478 - (DOMRange *)_selectedRange
 479 {
 480     return [[self _bridge] selectedDOMRange];
 481 }
 482
 483 - (BOOL)_shouldDeleteRange:(DOMRange *)range
 484 {
 485     if (range == nil || [range collapsed])
 486         return NO;
 487
 488     if (![[self _bridge] canDeleteRange:range])
 489         return NO;
 490
 491     WebView *webView = [self _webView];
 492     return [[webView _editingDelegateForwarder] webView:webView shouldDeleteDOMRange:range];
 493 }
 494
 495 - (void)_deleteRange:(DOMRange *)range
 496             killRing:(BOOL)killRing
 497              prepend:(BOOL)prepend
 498        smartDeleteOK:(BOOL)smartDeleteOK
 499       deletionAction:(WebDeletionAction)deletionAction
 500 {
 501     if (![self _shouldDeleteRange:range]) {
 502         return;
 503     }
 504
 505     WebBridge *bridge = [self _bridge];
 506     BOOL smartDelete = smartDeleteOK ? [self _canSmartCopyOrDelete] : NO;
 507
 508     BOOL startNewKillRingSequence = _private->startNewKillRingSequence;
 509
 510     if (killRing) {
 511         if (startNewKillRingSequence) {
 512             _NSNewKillRingSequence();
 513         }
 514         NSString *string = [bridge stringForRange:range];
 515         if (prepend) {
 516             _NSPrependToKillRing(string);
 517         } else {
 518             _NSAppendToKillRing(string);
 519         }
 520         startNewKillRingSequence = NO;
 521     }
 522
 523     switch (deletionAction) {
 524         case deleteSelectionAction:
 525             [bridge setSelectedDOMRange:range affinity:NSSelectionAffinityDownstream closeTyping:YES];
 526             [bridge deleteSelectionWithSmartDelete:smartDelete];
 527             break;
 528         case deleteKeyAction:
 529             [bridge setSelectedDOMRange:range affinity:NSSelectionAffinityDownstream closeTyping:NO];
 530             [bridge deleteKeyPressedWithSmartDelete:smartDelete];
 531             break;
 532         case forwardDeleteKeyAction:
 533             [bridge setSelectedDOMRange:range affinity:NSSelectionAffinityDownstream closeTyping:NO];
 534             [bridge forwardDeleteKeyPressedWithSmartDelete:smartDelete];
 535             break;
 536     }
 537
 538     _private->startNewKillRingSequence = startNewKillRingSequence;
 539 }
 540
 541 - (void)_deleteSelection
 542 {
 543     [self _deleteRange:[self _selectedRange]
 544               killRing:YES
 545                prepend:NO
 546          smartDeleteOK:YES
 547         deletionAction:deleteSelectionAction];
 548 }
 549
 550 - (BOOL)_canSmartReplaceWithPasteboard:(NSPasteboard *)pasteboard
 551 {
 552     return [[self _webView] smartInsertDeleteEnabled] && [[pasteboard types] containsObject:WebSmartPastePboardType];
 553 }
 554
 555 - (NSView *)_hitViewForEvent:(NSEvent *)event
 556 {
 557     // Usually, we hack AK's hitTest method to catch all events at the topmost WebHTMLView.
 558     // Callers of this method, however, want to query the deepest view instead.
 559     forceRealHitTest = YES;
 560     NSView *hitView = [[[self window] contentView] hitTest:[event locationInWindow]];
 561     forceRealHitTest = NO;
 562     return hitView;
 563 }
 564
 565 // This method is copied from NSTextView
 566 - (NSAttributedString *)_stripAttachmentCharactersFromAttributedString:(NSAttributedString *)originalAttributedString
 567 {
 568     NSRange attachmentRange;
 569     NSString *originalString = [originalAttributedString string];
 570     static NSString *attachmentCharString = nil;
 571
 572     if (!attachmentCharString) {
 573         unichar chars[2];
 574         if (!attachmentCharString) {
 575             chars[0] = NSAttachmentCharacter;
 576             chars[1] = 0;
 577             attachmentCharString = [[NSString alloc] initWithCharacters:chars length:1];
 578         }
 579     }
 580
 581     attachmentRange = [originalString rangeOfString:attachmentCharString];
 582     if (attachmentRange.location != NSNotFound && attachmentRange.length > 0) {
 583         NSMutableAttributedString *newAttributedString = [[originalAttributedString mutableCopyWithZone:NULL] autorelease];
 584
 585         while (attachmentRange.location != NSNotFound && attachmentRange.length > 0) {
 586             [newAttributedString replaceCharactersInRange:attachmentRange withString:@""];
 587             attachmentRange = [[newAttributedString string] rangeOfString:attachmentCharString];
 588         }
 589         return newAttributedString;
 590     } else {
 591         return originalAttributedString;
 592     }
 593 }
 594
 595 - (void)_writeSelectionWithPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard cachedAttributedString:(NSAttributedString *)attributedString
 596 {
 597     // Put HTML on the pasteboard.
 598     if ([types containsObject:WebArchivePboardType]) {
 599         WebArchive *archive = [self _selectedArchive];
 600         [pasteboard setData:[archive data] forType:WebArchivePboardType];
 601     }
 602
 603     // Put the attributed string on the pasteboard (RTF/RTFD format).
 604     if ([types containsObject:NSRTFDPboardType]) {
 605         if (attributedString == nil) {
 606             attributedString = [self selectedAttributedString];
 607         }
 608         NSData *RTFDData = [attributedString RTFDFromRange:NSMakeRange(0, [attributedString length]) documentAttributes:nil];
 609         [pasteboard setData:RTFDData forType:NSRTFDPboardType];
 610     }
 611     if ([types containsObject:NSRTFPboardType]) {
 612         if (attributedString == nil) {
 613             attributedString = [self selectedAttributedString];
 614         }
 615         if ([attributedString containsAttachments]) {
 616             attributedString = [self _stripAttachmentCharactersFromAttributedString:attributedString];
 617         }
 618         NSData *RTFData = [attributedString RTFFromRange:NSMakeRange(0, [attributedString length]) documentAttributes:nil];
 619         [pasteboard setData:RTFData forType:NSRTFPboardType];
 620     }
 621
 622     // Put plain string on the pasteboard.
 623     if ([types containsObject:NSStringPboardType]) {
 624         // Map &nbsp; to a plain old space because this is better for source code, other browsers do it,
 625         // and because HTML forces you to do this any time you want two spaces in a row.
 626         NSMutableString *s = [[self selectedString] mutableCopy];
 627         const unichar NonBreakingSpaceCharacter = 0xA0;
 628         NSString *NonBreakingSpaceString = [NSString stringWithCharacters:&NonBreakingSpaceCharacter length:1];
 629         [s replaceOccurrencesOfString:NonBreakingSpaceString withString:@" " options:0 range:NSMakeRange(0, [s length])];
 630         [pasteboard setString:s forType:NSStringPboardType];
 631         [s release];
 632     }
 633
 634     if ([self _canSmartCopyOrDelete] && [types containsObject:WebSmartPastePboardType]) {
 635         [pasteboard setData:nil forType:WebSmartPastePboardType];
 636     }
 637 }
 638
 639 @end
 640
 641 @implementation WebHTMLView (WebPrivate)
 642
 643 - (void)_reset
 644 {
 645     [WebImageRenderer stopAnimationsInView:self];
 646 }
 647
 648 + (void)_postFlagsChangedEvent:(NSEvent *)flagsChangedEvent
 649 {
 650     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSMouseMoved
 651         location:[[flagsChangedEvent window] convertScreenToBase:[NSEvent mouseLocation]]
 652         modifierFlags:[flagsChangedEvent modifierFlags]
 653         timestamp:[flagsChangedEvent timestamp]
 654         windowNumber:[flagsChangedEvent windowNumber]
 655         context:[flagsChangedEvent context]
 656         eventNumber:0 clickCount:0 pressure:0];
 657
 658     // Pretend it's a mouse move.
 659     [[NSNotificationCenter defaultCenter]
 660         postNotificationName:NSMouseMovedNotification object:self
 661         userInfo:[NSDictionary dictionaryWithObject:fakeEvent forKey:@"NSEvent"]];
 662 }
 663
 664 - (void)_updateMouseoverWithFakeEvent
 665 {
 666     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSMouseMoved
 667         location:[[self window] convertScreenToBase:[NSEvent mouseLocation]]
 668         modifierFlags:[[NSApp currentEvent] modifierFlags]
 669         timestamp:[NSDate timeIntervalSinceReferenceDate]
 670         windowNumber:[[self window] windowNumber]
 671         context:[[NSApp currentEvent] context]
 672         eventNumber:0 clickCount:0 pressure:0];
 673
 674     [self _updateMouseoverWithEvent:fakeEvent];
 675 }
 676
 677 - (void)_frameOrBoundsChanged
 678 {
 679     if (!NSEqualSizes(_private->lastLayoutSize, [(NSClipView *)[self superview] documentVisibleRect].size)) {
 680         [self setNeedsLayout:YES];
 681         [self setNeedsDisplay:YES];
 682         [_private->compController endRevertingChange:NO moveLeft:NO];
 683     }
 684
 685     NSPoint origin = [[self superview] bounds].origin;
 686     if (!NSEqualPoints(_private->lastScrollPosition, origin)) {
 687         [[self _bridge] sendScrollEvent];
 688         [_private->compController endRevertingChange:NO moveLeft:NO];
 689     }
 690     _private->lastScrollPosition = origin;
 691
 692     SEL selector = @selector(_updateMouseoverWithFakeEvent);
 693     [NSObject cancelPreviousPerformRequestsWithTarget:self selector:selector object:nil];
 694     [self performSelector:selector withObject:nil afterDelay:0];
 695 }
 696
 697 - (void)_setAsideSubviews
 698 {
 699     ASSERT(!_private->subviewsSetAside);
 700     ASSERT(_private->savedSubviews == nil);
 701     _private->savedSubviews = _subviews;
 702     _subviews = nil;
 703     _private->subviewsSetAside = YES;
 704  }
 705
 706  - (void)_restoreSubviews
 707  {
 708     ASSERT(_private->subviewsSetAside);
 709     ASSERT(_subviews == nil);
 710     _subviews = _private->savedSubviews;
 711     _private->savedSubviews = nil;
 712     _private->subviewsSetAside = NO;
 713 }
 714
 715 // This is called when we are about to draw, but before our dirty rect is propagated to our ancestors.
 716 // That's the perfect time to do a layout, except that ideally we'd want to be sure that we're dirty
 717 // before doing it. As a compromise, when we're opaque we do the layout only when actually asked to
 718 // draw, but when we're transparent we do the layout at this stage so views behind us know that they
 719 // need to be redrawn (in case the layout causes some things to get dirtied).
 720 - (void)_propagateDirtyRectsToOpaqueAncestors
 721 {
 722     if (![[self _webView] drawsBackground]) {
 723         [self _web_layoutIfNeededRecursive];
 724     }
 725     [super _propagateDirtyRectsToOpaqueAncestors];
 726 }
 727
 728 // Don't let AppKit even draw subviews. We take care of that.
 729 - (void)_recursiveDisplayRectIfNeededIgnoringOpacity:(NSRect)rect isVisibleRect:(BOOL)isVisibleRect rectIsVisibleRectForView:(NSView *)visibleView topView:(BOOL)topView
 730 {
 731     // This helps when we print as part of a larger print process.
 732     // If the WebHTMLView itself is what we're printing, then we will never have to do this.
 733     BOOL wasInPrintingMode = _private->printing;
 734     BOOL isPrinting = ![NSGraphicsContext currentContextDrawingToScreen];
 735     if (wasInPrintingMode != isPrinting) {
 736         if (isPrinting) {
 737             [self _web_setPrintingModeRecursive];
 738         } else {
 739             [self _web_clearPrintingModeRecursive];
 740         }
 741     }
 742
 743     [self _web_layoutIfNeededRecursive: rect testDirtyRect:YES];
 744
 745     [self _setAsideSubviews];
 746     [super _recursiveDisplayRectIfNeededIgnoringOpacity:rect isVisibleRect:isVisibleRect
 747         rectIsVisibleRectForView:visibleView topView:topView];
 748     [self _restoreSubviews];
 749
 750     if (wasInPrintingMode != isPrinting) {
 751         if (wasInPrintingMode) {
 752             [self _web_setPrintingModeRecursive];
 753         } else {
 754             [self _web_clearPrintingModeRecursive];
 755         }
 756     }
 757 }
 758
 759 // Don't let AppKit even draw subviews. We take care of that.
 760 - (void)_recursiveDisplayAllDirtyWithLockFocus:(BOOL)needsLockFocus visRect:(NSRect)visRect
 761 {
 762     BOOL needToSetAsideSubviews = !_private->subviewsSetAside;
 763
 764     BOOL wasInPrintingMode = _private->printing;
 765     BOOL isPrinting = ![NSGraphicsContext currentContextDrawingToScreen];
 766
 767     if (needToSetAsideSubviews) {
 768         // This helps when we print as part of a larger print process.
 769         // If the WebHTMLView itself is what we're printing, then we will never have to do this.
 770         if (wasInPrintingMode != isPrinting) {
 771             if (isPrinting) {
 772                 [self _web_setPrintingModeRecursive];
 773             } else {
 774                 [self _web_clearPrintingModeRecursive];
 775             }
 776         }
 777
 778         NSRect boundsBeforeLayout = [self bounds];
 779         [self _web_layoutIfNeededRecursive: visRect testDirtyRect:NO];
 780
 781         // If layout changes the view's bounds, then we need to recompute the visRect.
 782         // That's because the visRect passed to us was based on the bounds at the time
 783         // we were called. This method is only displayed to draw "all", so it's safe
 784         // to just call visibleRect to compute the entire rectangle.
 785         if (!NSEqualRects(boundsBeforeLayout, [self bounds])) {
 786             visRect = [self visibleRect];
 787         }
 788
 789         [self _setAsideSubviews];
 790     }
 791
 792     [super _recursiveDisplayAllDirtyWithLockFocus:needsLockFocus visRect:visRect];
 793
 794     if (needToSetAsideSubviews) {
 795         if (wasInPrintingMode != isPrinting) {
 796             if (wasInPrintingMode) {
 797                 [self _web_setPrintingModeRecursive];
 798             } else {
 799                 [self _web_clearPrintingModeRecursive];
 800             }
 801         }
 802
 803         [self _restoreSubviews];
 804     }
 805 }
 806
 807 - (BOOL)_insideAnotherHTMLView
 808 {
 809     NSView *view = self;
 810     while ((view = [view superview])) {
 811         if ([view isKindOfClass:[WebHTMLView class]]) {
 812             return YES;
 813         }
 814     }
 815     return NO;
 816 }
 817
 818 - (void)scrollPoint:(NSPoint)point
 819 {
 820     // Since we can't subclass NSTextView to do what we want, we have to second guess it here.
 821     // If we get called during the handling of a key down event, we assume the call came from
 822     // NSTextView, and ignore it and use our own code to decide how to page up and page down
 823     // We are smarter about how far to scroll, and we have "superview scrolling" logic.
 824     NSEvent *event = [[self window] currentEvent];
 825     if ([event type] == NSKeyDown) {
 826         const unichar pageUp = NSPageUpFunctionKey;
 827         if ([[event characters] rangeOfString:[NSString stringWithCharacters:&pageUp length:1]].length == 1) {
 828             [self tryToPerform:@selector(scrollPageUp:) with:nil];
 829             return;
 830         }
 831         const unichar pageDown = NSPageDownFunctionKey;
 832         if ([[event characters] rangeOfString:[NSString stringWithCharacters:&pageDown length:1]].length == 1) {
 833             [self tryToPerform:@selector(scrollPageDown:) with:nil];
 834             return;
 835         }
 836     }
 837
 838     [super scrollPoint:point];
 839 }
 840
 841 - (NSView *)hitTest:(NSPoint)point
 842 {
 843     // WebHTMLView objects handle all left mouse clicks for objects inside them.
 844     // That does not include left mouse clicks with the control key held down.
 845     BOOL captureHitsOnSubviews;
 846     if (forceRealHitTest) {
 847         captureHitsOnSubviews = NO;
 848     } else {
 849         NSEvent *event = [[self window] currentEvent];
 850         captureHitsOnSubviews = [event type] == NSLeftMouseDown && ([event modifierFlags] & NSControlKeyMask) == 0;
 851     }
 852     if (!captureHitsOnSubviews) {
 853         return [super hitTest:point];
 854     }
 855     if ([[self superview] mouse:point inRect:[self frame]]) {
 856         return self;
 857     }
 858     return nil;
 859 }
 860
 861 static WebHTMLView *lastHitView = nil;
 862
 863 - (void)_clearLastHitViewIfSelf
 864 {
 865     if (lastHitView == self) {
 866         lastHitView = nil;
 867     }
 868 }
 869
 870 - (NSTrackingRectTag)addTrackingRect:(NSRect)rect owner:(id)owner userData:(void *)data assumeInside:(BOOL)assumeInside
 871 {
 872     ASSERT(_private->trackingRectOwner == nil);
 873     _private->trackingRectOwner = owner;
 874     _private->trackingRectUserData = data;
 875     return TRACKING_RECT_TAG;
 876 }
 877
 878 - (NSTrackingRectTag)_addTrackingRect:(NSRect)rect owner:(id)owner userData:(void *)data assumeInside:(BOOL)assumeInside useTrackingNum:(int)tag
 879 {
 880     ASSERT(tag == 0 || tag == TRACKING_RECT_TAG);
 881     ASSERT(_private->trackingRectOwner == nil);
 882     _private->trackingRectOwner = owner;
 883     _private->trackingRectUserData = data;
 884     return TRACKING_RECT_TAG;
 885 }
 886
 887 - (void)_addTrackingRects:(NSRect *)rects owner:(id)owner userDataList:(void **)userDataList assumeInsideList:(BOOL *)assumeInsideList trackingNums:(NSTrackingRectTag *)trackingNums count:(int)count
 888 {
 889     ASSERT(count == 1);
 890     ASSERT(trackingNums[0] == 0 || trackingNums[0] == TRACKING_RECT_TAG);
 891     ASSERT(_private->trackingRectOwner == nil);
 892     _private->trackingRectOwner = owner;
 893     _private->trackingRectUserData = userDataList[0];
 894     trackingNums[0] = TRACKING_RECT_TAG;
 895 }
 896
 897 - (void)removeTrackingRect:(NSTrackingRectTag)tag
 898 {
 899     if (tag == 0)
 900         return;
 901     ASSERT(tag == TRACKING_RECT_TAG);
 902     if (_private != nil) {
 903         _private->trackingRectOwner = nil;
 904     }
 905 }
 906
 907 - (void)_removeTrackingRects:(NSTrackingRectTag *)tags count:(int)count
 908 {
 909     int i;
 910     for (i = 0; i < count; ++i) {
 911         int tag = tags[i];
 912         if (tag == 0)
 913             continue;
 914         ASSERT(tag == TRACKING_RECT_TAG);
 915         if (_private != nil) {
 916             _private->trackingRectOwner = nil;
 917         }
 918     }
 919 }
 920
 921 - (void)_sendToolTipMouseExited
 922 {
 923     // Nothing matters except window, trackingNumber, and userData.
 924     NSEvent *fakeEvent = [NSEvent enterExitEventWithType:NSMouseExited
 925         location:NSMakePoint(0, 0)
 926         modifierFlags:0
 927         timestamp:0
 928         windowNumber:[[self window] windowNumber]
 929         context:NULL
 930         eventNumber:0
 931         trackingNumber:TRACKING_RECT_TAG
 932         userData:_private->trackingRectUserData];
 933     [_private->trackingRectOwner mouseExited:fakeEvent];
 934 }
 935
 936 - (void)_sendToolTipMouseEntered
 937 {
 938     // Nothing matters except window, trackingNumber, and userData.
 939     NSEvent *fakeEvent = [NSEvent enterExitEventWithType:NSMouseEntered
 940         location:NSMakePoint(0, 0)
 941         modifierFlags:0
 942         timestamp:0
 943         windowNumber:[[self window] windowNumber]
 944         context:NULL
 945         eventNumber:0
 946         trackingNumber:TRACKING_RECT_TAG
 947         userData:_private->trackingRectUserData];
 948     [_private->trackingRectOwner mouseEntered:fakeEvent];
 949 }
 950
 951 - (void)_setToolTip:(NSString *)string
 952 {
 953     NSString *toolTip = [string length] == 0 ? nil : string;
 954     NSString *oldToolTip = _private->toolTip;
 955     if ((toolTip == nil || oldToolTip == nil) ? toolTip == oldToolTip : [toolTip isEqualToString:oldToolTip]) {
 956         return;
 957     }
 958     if (oldToolTip) {
 959         [self _sendToolTipMouseExited];
 960         [oldToolTip release];
 961     }
 962     _private->toolTip = [toolTip copy];
 963     if (toolTip) {
 964         [self removeAllToolTips];
 965         NSRect wideOpenRect = NSMakeRect(-100000, -100000, 200000, 200000);
 966         [self addToolTipRect:wideOpenRect owner:self userData:NULL];
 967         [self _sendToolTipMouseEntered];
 968     }
 969 }
 970
 971 - (NSString *)view:(NSView *)view stringForToolTip:(NSToolTipTag)tag point:(NSPoint)point userData:(void *)data
 972 {
 973     return [[_private->toolTip copy] autorelease];
 974 }
 975
 976 - (void)_updateMouseoverWithEvent:(NSEvent *)event
 977 {
 978     [self retain];
 979
 980     WebHTMLView *view = nil;
 981     if ([event window] == [self window]) {
 982         NSView *hitView = [self _hitViewForEvent:event];
 983         while (hitView) {
 984             if ([hitView isKindOfClass:[WebHTMLView class]]) {
 985                 view = (WebHTMLView *)hitView;
 986                 break;
 987             }
 988             hitView = [hitView superview];
 989         }
 990     }
 991
 992     if (lastHitView != view && lastHitView != nil) {
 993         // If we are moving out of a view (or frame), let's pretend the mouse moved
 994         // all the way out of that view. But we have to account for scrolling, because
 995         // khtml doesn't understand our clipping.
 996         NSRect visibleRect = [[[[lastHitView _frame] frameView] _scrollView] documentVisibleRect];
 997         float yScroll = visibleRect.origin.y;
 998         float xScroll = visibleRect.origin.x;
 999
1000         event = [NSEvent mouseEventWithType:NSMouseMoved
1001                          location:NSMakePoint(-1 - xScroll, -1 - yScroll )
1002                          modifierFlags:[[NSApp currentEvent] modifierFlags]
1003                          timestamp:[NSDate timeIntervalSinceReferenceDate]
1004                          windowNumber:[[self window] windowNumber]
1005                          context:[[NSApp currentEvent] context]
1006                          eventNumber:0 clickCount:0 pressure:0];
1007         [[lastHitView _bridge] mouseMoved:event];
1008     }
1009
1010     lastHitView = view;
1011
1012     NSDictionary *element;
1013     if (view == nil) {
1014         element = nil;
1015     } else {
1016         [[view _bridge] mouseMoved:event];
1017
1018         NSPoint point = [view convertPoint:[event locationInWindow] fromView:nil];
1019         element = [view elementAtPoint:point];
1020     }
1021
1022     // Have the web view send a message to the delegate so it can do status bar display.
1023     [[self _webView] _mouseDidMoveOverElement:element modifierFlags:[event modifierFlags]];
1024
1025     // Set a tool tip; it won't show up right away but will if the user pauses.
1026     NSString *newToolTip = nil;
1027     if (_private->showsURLsInToolTips) {
1028         newToolTip = [[element objectForKey:WebCoreElementLinkURLKey] _web_userVisibleString];
1029     }
1030     if (newToolTip == nil) {
1031         newToolTip = [element objectForKey:WebCoreElementTitleKey];
1032     }
1033     [self _setToolTip:newToolTip];
1034
1035     [self release];
1036 }
1037
1038 + (NSArray *)_insertablePasteboardTypes
1039 {
1040     static NSArray *types = nil;
1041     if (!types) {
1042         types = [[NSArray alloc] initWithObjects:WebArchivePboardType, NSHTMLPboardType,
1043             NSFilenamesPboardType, NSTIFFPboardType, NSPICTPboardType, NSURLPboardType,
1044             NSRTFDPboardType, NSRTFPboardType, NSStringPboardType, NSColorPboardType, nil];
1045     }
1046     return types;
1047 }
1048
1049 + (NSArray *)_selectionPasteboardTypes
1050 {
1051     // FIXME: We should put data for NSHTMLPboardType on the pasteboard but Microsoft Excel doesn't like our format of HTML (3640423).
1052     return [NSArray arrayWithObjects:WebArchivePboardType, NSRTFPboardType, NSRTFDPboardType, NSStringPboardType, nil];
1053 }
1054
1055 - (WebArchive *)_selectedArchive
1056 {
1057     NSArray *nodes;
1058 #if !LOG_DISABLED
1059     double start = CFAbsoluteTimeGetCurrent();
1060 #endif
1061     NSString *markupString = [[self _bridge] markupStringFromRange:[self _selectedRange] nodes:&nodes];
1062 #if !LOG_DISABLED
1063     double duration = CFAbsoluteTimeGetCurrent() - start;
1064     LOG(Timing, "copying markup took %f seconds.", duration);
1065 #endif
1066
1067     WebArchive *archive = [[self _dataSource] _archiveWithMarkupString:markupString nodes:nodes];
1068
1069     if ([[self _bridge] isFrameSet]) {
1070         // Wrap the frameset document in an iframe so it can be pasted into
1071         // another document (which will have a body or frameset of its own).
1072         NSString *iframeMarkup = [[NSString alloc] initWithFormat:@"<iframe frameborder=\"no\" marginwidth=\"0\" marginheight=\"0\" width=\"98%%\" height=\"98%%\" src=\"%@\"></iframe>", [[[self _dataSource] response] URL]];
1073         WebResource *iframeResource = [[WebResource alloc] initWithData:[iframeMarkup dataUsingEncoding:NSUTF8StringEncoding]
1074                                                                   URL:[NSURL URLWithString:@"about:blank"]
1075                                                              MIMEType:@"text/html"
1076                                                      textEncodingName:@"UTF-8"
1077                                                             frameName:nil];
1078
1079         NSArray *subframeArchives = [NSArray arrayWithObject:archive];
1080         archive = [[[WebArchive alloc] initWithMainResource:iframeResource subresources:nil subframeArchives:subframeArchives] autorelease];
1081
1082         [iframeResource release];
1083         [iframeMarkup release];
1084     }
1085
1086     return archive;
1087 }
1088
1089 - (void)_writeSelectionToPasteboard:(NSPasteboard *)pasteboard
1090 {
1091     ASSERT([self _hasSelection]);
1092     NSArray *types = [self pasteboardTypesForSelection];
1093
1094     // Don't write RTFD to the pasteboard when the copied attributed string has no attachments.
1095     NSAttributedString *attributedString = [self selectedAttributedString];
1096     NSMutableArray *mutableTypes = nil;
1097     if (![attributedString containsAttachments]) {
1098         mutableTypes = [types mutableCopy];
1099         [mutableTypes removeObject:NSRTFDPboardType];
1100         types = mutableTypes;
1101     }
1102
1103     [pasteboard declareTypes:types owner:nil];
1104     [self _writeSelectionWithPasteboardTypes:types toPasteboard:pasteboard cachedAttributedString:attributedString];
1105     [mutableTypes release];
1106 }
1107
1108 - (NSImage *)_dragImageForLinkElement:(NSDictionary *)element
1109 {
1110     NSURL *linkURL = [element objectForKey: WebElementLinkURLKey];
1111
1112     BOOL drawURLString = YES;
1113     BOOL clipURLString = NO, clipLabelString = NO;
1114
1115     NSString *label = [element objectForKey: WebElementLinkLabelKey];
1116     NSString *urlString = [linkURL _web_userVisibleString];
1117
1118     if (!label) {
1119         drawURLString = NO;
1120         label = urlString;
1121     }
1122
1123     NSFont *labelFont = [[NSFontManager sharedFontManager] convertFont:[NSFont systemFontOfSize:DRAG_LINK_LABEL_FONT_SIZE]
1124                                                    toHaveTrait:NSBoldFontMask];
1125     NSFont *urlFont = [NSFont systemFontOfSize: DRAG_LINK_URL_FONT_SIZE];
1126     NSSize labelSize;
1127     labelSize.width = [label _web_widthWithFont: labelFont];
1128     labelSize.height = [labelFont ascender] - [labelFont descender];
1129     if (labelSize.width > MAX_DRAG_LABEL_WIDTH){
1130         labelSize.width = MAX_DRAG_LABEL_WIDTH;
1131         clipLabelString = YES;
1132     }
1133
1134     NSSize imageSize, urlStringSize;
1135     imageSize.width = labelSize.width + DRAG_LABEL_BORDER_X * 2;
1136     imageSize.height = labelSize.height + DRAG_LABEL_BORDER_Y * 2;
1137     if (drawURLString) {
1138         urlStringSize.width = [urlString _web_widthWithFont: urlFont];
1139         urlStringSize.height = [urlFont ascender] - [urlFont descender];
1140         imageSize.height += urlStringSize.height;
1141         if (urlStringSize.width > MAX_DRAG_LABEL_WIDTH) {
1142             imageSize.width = MAX(MAX_DRAG_LABEL_WIDTH + DRAG_LABEL_BORDER_X * 2, MIN_DRAG_LABEL_WIDTH_BEFORE_CLIP);
1143             clipURLString = YES;
1144         } else {
1145             imageSize.width = MAX(labelSize.width + DRAG_LABEL_BORDER_X * 2, urlStringSize.width + DRAG_LABEL_BORDER_X * 2);
1146         }
1147     }
1148     NSImage *dragImage = [[[NSImage alloc] initWithSize: imageSize] autorelease];
1149     [dragImage lockFocus];
1150
1151     [[NSColor colorWithCalibratedRed: 0.7 green: 0.7 blue: 0.7 alpha: 0.8] set];
1152
1153     // Drag a rectangle with rounded corners/
1154     NSBezierPath *path = [NSBezierPath bezierPath];
1155     [path appendBezierPathWithOvalInRect: NSMakeRect(0,0, DRAG_LABEL_RADIUS * 2, DRAG_LABEL_RADIUS * 2)];
1156     [path appendBezierPathWithOvalInRect: NSMakeRect(0,imageSize.height - DRAG_LABEL_RADIUS * 2, DRAG_LABEL_RADIUS * 2, DRAG_LABEL_RADIUS * 2)];
1157     [path appendBezierPathWithOvalInRect: NSMakeRect(imageSize.width - DRAG_LABEL_RADIUS * 2, imageSize.height - DRAG_LABEL_RADIUS * 2, DRAG_LABEL_RADIUS * 2, DRAG_LABEL_RADIUS * 2)];
1158     [path appendBezierPathWithOvalInRect: NSMakeRect(imageSize.width - DRAG_LABEL_RADIUS * 2,0, DRAG_LABEL_RADIUS * 2, DRAG_LABEL_RADIUS * 2)];
1159
1160     [path appendBezierPathWithRect: NSMakeRect(DRAG_LABEL_RADIUS, 0, imageSize.width - DRAG_LABEL_RADIUS * 2, imageSize.height)];
1161     [path appendBezierPathWithRect: NSMakeRect(0, DRAG_LABEL_RADIUS, DRAG_LABEL_RADIUS + 10, imageSize.height - 2 * DRAG_LABEL_RADIUS)];
1162     [path appendBezierPathWithRect: NSMakeRect(imageSize.width - DRAG_LABEL_RADIUS - 20,DRAG_LABEL_RADIUS, DRAG_LABEL_RADIUS + 20, imageSize.height - 2 * DRAG_LABEL_RADIUS)];
1163     [path fill];
1164
1165     NSColor *topColor = [NSColor colorWithCalibratedWhite:0.0 alpha:0.75];
1166     NSColor *bottomColor = [NSColor colorWithCalibratedWhite:1.0 alpha:0.5];
1167     if (drawURLString) {
1168         if (clipURLString)
1169             urlString = [WebStringTruncator centerTruncateString: urlString toWidth:imageSize.width - (DRAG_LABEL_BORDER_X * 2) withFont:urlFont];
1170
1171         [urlString _web_drawDoubledAtPoint:NSMakePoint(DRAG_LABEL_BORDER_X, DRAG_LABEL_BORDER_Y - [urlFont descender])
1172              withTopColor:topColor bottomColor:bottomColor font:urlFont];
1173     }
1174
1175     if (clipLabelString)
1176         label = [WebStringTruncator rightTruncateString: label toWidth:imageSize.width - (DRAG_LABEL_BORDER_X * 2) withFont:labelFont];
1177     [label _web_drawDoubledAtPoint:NSMakePoint (DRAG_LABEL_BORDER_X, imageSize.height - DRAG_LABEL_BORDER_Y_OFFSET - [labelFont pointSize])
1178              withTopColor:topColor bottomColor:bottomColor font:labelFont];
1179
1180     [dragImage unlockFocus];
1181
1182     return dragImage;
1183 }
1184
1185 - (BOOL)_startDraggingImage:(NSImage *)wcDragImage at:(NSPoint)wcDragLoc operation:(NSDragOperation)op event:(NSEvent *)mouseDraggedEvent sourceIsDHTML:(BOOL)srcIsDHTML DHTMLWroteData:(BOOL)dhtmlWroteData
1186 {
1187     NSPoint mouseDownPoint = [self convertPoint:[_private->mouseDownEvent locationInWindow] fromView:nil];
1188     NSDictionary *element = [self elementAtPoint:mouseDownPoint];
1189
1190     NSURL *linkURL = [element objectForKey:WebElementLinkURLKey];
1191     NSURL *imageURL = [element objectForKey:WebElementImageURLKey];
1192     BOOL isSelected = [[element objectForKey:WebElementIsSelectedKey] boolValue];
1193
1194     [_private->draggingImageURL release];
1195     _private->draggingImageURL = nil;
1196
1197     NSPoint mouseDraggedPoint = [self convertPoint:[mouseDraggedEvent locationInWindow] fromView:nil];
1198     _private->webCoreDragOp = op;     // will be DragNone if WebCore doesn't care
1199     NSImage *dragImage = nil;
1200     NSPoint dragLoc;
1201
1202     // We allow WebCore to override the drag image, even if its a link, image or text we're dragging.
1203     // This is in the spirit of the IE API, which allows overriding of pasteboard data and DragOp.
1204     // We could verify that ActionDHTML is allowed, although WebCore does claim to respect the action.
1205     if (wcDragImage) {
1206         dragImage = wcDragImage;
1207         // wcDragLoc is the cursor position relative to the lower-left corner of the image.
1208         // We add in the Y dimension because we are a flipped view, so adding moves the image down.
1209         if (linkURL) {
1210             // see HACK below
1211             dragLoc = NSMakePoint(mouseDraggedPoint.x - wcDragLoc.x, mouseDraggedPoint.y + wcDragLoc.y);
1212         } else {
1213             dragLoc = NSMakePoint(mouseDownPoint.x - wcDragLoc.x, mouseDownPoint.y + wcDragLoc.y);
1214         }
1215         _private->dragOffset = wcDragLoc;
1216     }
1217
1218     WebView *webView = [self _webView];
1219     NSPasteboard *pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
1220     WebImageRenderer *image = [element objectForKey:WebElementImageKey];
1221     BOOL startedDrag = YES;  // optimism - we almost always manage to start the drag
1222
1223     // note per kwebster, the offset arg below is always ignored in positioning the image
1224     if (imageURL != nil && image != nil && (_private->dragSourceActionMask & WebDragSourceActionImage)) {
1225         id source = self;
1226         if (!dhtmlWroteData) {
1227             // Select the image when it is dragged. This allows the image to be moved via MoveSelectionCommandImpl and this matches NSTextView's behavior.
1228             DOMHTMLElement *imageElement = [element objectForKey:WebElementDOMNodeKey];
1229             ASSERT(imageElement != nil);
1230             [webView setSelectedDOMRange:[[[self _bridge] DOMDocument] _createRangeWithNode:imageElement] affinity:NSSelectionAffinityDownstream];
1231             _private->draggingImageURL = [imageURL retain];
1232             source = [pasteboard _web_declareAndWriteDragImage:image
1233                                                            URL:linkURL ? linkURL : imageURL
1234                                                          title:[element objectForKey:WebElementImageAltStringKey]
1235                                                        archive:[imageElement webArchive]
1236                                                         source:self];
1237         }
1238         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionImage fromPoint:mouseDownPoint withPasteboard:pasteboard];
1239         if (dragImage == nil) {
1240             [self _web_dragImage:[element objectForKey:WebElementImageKey]
1241                             rect:[[element objectForKey:WebElementImageRectKey] rectValue]
1242                            event:_private->mouseDownEvent
1243                       pasteboard:pasteboard
1244                           source:source
1245                           offset:&_private->dragOffset];
1246         } else {
1247             [self dragImage:dragImage
1248                          at:dragLoc
1249                      offset:NSZeroSize
1250                       event:_private->mouseDownEvent
1251                  pasteboard:pasteboard
1252                      source:source
1253                   slideBack:YES];
1254         }
1255     } else if (linkURL && (_private->dragSourceActionMask & WebDragSourceActionLink)) {
1256         if (!dhtmlWroteData) {
1257             NSArray *types = [NSPasteboard _web_writableTypesForURL];
1258             [pasteboard declareTypes:types owner:self];
1259             [pasteboard _web_writeURL:linkURL andTitle:[element objectForKey:WebElementLinkLabelKey] types:types];
1260         }
1261         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionLink fromPoint:mouseDownPoint withPasteboard:pasteboard];
1262         if (dragImage == nil) {
1263             dragImage = [self _dragImageForLinkElement:element];
1264             NSSize offset = NSMakeSize([dragImage size].width / 2, -DRAG_LABEL_BORDER_Y);
1265             dragLoc = NSMakePoint(mouseDraggedPoint.x - offset.width, mouseDraggedPoint.y - offset.height);
1266             _private->dragOffset.x = offset.width;
1267             _private->dragOffset.y = -offset.height;        // inverted because we are flipped
1268         }
1269         // HACK:  We should pass the mouseDown event instead of the mouseDragged!  This hack gets rid of
1270         // a flash of the image at the mouseDown location when the drag starts.
1271         [self dragImage:dragImage
1272                      at:dragLoc
1273                  offset:NSZeroSize
1274                   event:mouseDraggedEvent
1275              pasteboard:pasteboard
1276                  source:self
1277               slideBack:YES];
1278     } else if (isSelected && (_private->dragSourceActionMask & WebDragSourceActionSelection)) {
1279         if (!dhtmlWroteData) {
1280             [self _writeSelectionToPasteboard:pasteboard];
1281         }
1282         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionSelection fromPoint:mouseDownPoint withPasteboard:pasteboard];
1283         if (dragImage == nil) {
1284             dragImage = [self _selectionDraggingImage];
1285             NSRect draggingRect = [self _selectionDraggingRect];
1286             dragLoc = NSMakePoint(NSMinX(draggingRect), NSMaxY(draggingRect));
1287             _private->dragOffset.x = mouseDownPoint.x - dragLoc.x;
1288             _private->dragOffset.y = dragLoc.y - mouseDownPoint.y;        // inverted because we are flipped
1289         }
1290         [self dragImage:dragImage
1291                      at:dragLoc
1292                  offset:NSZeroSize
1293                   event:_private->mouseDownEvent
1294              pasteboard:pasteboard
1295                  source:self
1296               slideBack:YES];
1297     } else if (srcIsDHTML) {
1298         ASSERT(_private->dragSourceActionMask & WebDragSourceActionDHTML);
1299         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionDHTML fromPoint:mouseDownPoint withPasteboard:pasteboard];
1300         if (dragImage == nil) {
1301             // WebCore should have given us an image, but we'll make one up
1302             NSString *imagePath = [[NSBundle bundleForClass:[self class]] pathForResource:@"missing_image" ofType:@"tiff"];
1303             dragImage = [[[NSImage alloc] initWithContentsOfFile:imagePath] autorelease];
1304             NSSize imageSize = [dragImage size];
1305             dragLoc = NSMakePoint(mouseDownPoint.x - imageSize.width/2, mouseDownPoint.y + imageSize.height/2);
1306             _private->dragOffset.x = imageSize.width/2;
1307             _private->dragOffset.y = imageSize.height/2;        // inverted because we are flipped
1308         }
1309         [self dragImage:dragImage
1310                      at:dragLoc
1311                  offset:NSZeroSize
1312                   event:_private->mouseDownEvent
1313              pasteboard:pasteboard
1314                  source:self
1315               slideBack:YES];
1316     } else {
1317         // Only way I know if to get here is if the original element clicked on in the mousedown is no longer
1318         // under the mousedown point, so linkURL, imageURL and isSelected are all false/nil.
1319         startedDrag = NO;
1320     }
1321     return startedDrag;
1322 }
1323
1324 - (void)_handleAutoscrollForMouseDragged:(NSEvent *)event
1325 {
1326     [self autoscroll:event];
1327     [self _startAutoscrollTimer:event];
1328 }
1329
1330 - (BOOL)_mayStartDragAtEventLocation:(NSPoint)location
1331 {
1332     NSPoint mouseDownPoint = [self convertPoint:location fromView:nil];
1333     NSDictionary *mouseDownElement = [self elementAtPoint:mouseDownPoint];
1334
1335     ASSERT([self _webView]);
1336     if ([mouseDownElement objectForKey: WebElementImageKey] != nil &&
1337         [mouseDownElement objectForKey: WebElementImageURLKey] != nil &&
1338         [[[self _webView] preferences] loadsImagesAutomatically] &&
1339         (_private->dragSourceActionMask & WebDragSourceActionImage)) {
1340         return YES;
1341     }
1342
1343     if ([mouseDownElement objectForKey:WebElementLinkURLKey] != nil &&
1344         (_private->dragSourceActionMask & WebDragSourceActionLink)) {
1345         return YES;
1346     }
1347
1348     if ([[mouseDownElement objectForKey:WebElementIsSelectedKey] boolValue] &&
1349         (_private->dragSourceActionMask & WebDragSourceActionSelection)) {
1350         return YES;
1351     }
1352
1353     return NO;
1354 }
1355
1356 - (WebPluginController *)_pluginController
1357 {
1358     return _private->pluginController;
1359 }
1360
1361 - (void)_web_setPrintingModeRecursive
1362 {
1363     [self _setPrinting:YES minimumPageWidth:0.0 maximumPageWidth:0.0 adjustViewSize:NO];
1364     [super _web_setPrintingModeRecursive];
1365 }
1366
1367 - (void)_web_clearPrintingModeRecursive
1368 {
1369     [self _setPrinting:NO minimumPageWidth:0.0 maximumPageWidth:0.0 adjustViewSize:NO];
1370     [super _web_clearPrintingModeRecursive];
1371 }
1372
1373 - (void)_layoutIfNeeded
1374 {
1375     ASSERT(!_private->subviewsSetAside);
1376
1377     if ([[self _bridge] needsLayout])
1378         _private->needsLayout = YES;
1379     if (_private->needsToApplyStyles || _private->needsLayout)
1380         [self layout];
1381 }
1382
1383 - (void)_web_layoutIfNeededRecursive
1384 {
1385     [self _layoutIfNeeded];
1386     [super _web_layoutIfNeededRecursive];
1387 }
1388
1389 - (void)_web_layoutIfNeededRecursive:(NSRect)displayRect testDirtyRect:(bool)testDirtyRect
1390 {
1391     ASSERT(!_private->subviewsSetAside);
1392     displayRect = NSIntersectionRect(displayRect, [self bounds]);
1393
1394     if (!testDirtyRect || [self needsDisplay]) {
1395         if (testDirtyRect) {
1396             NSRect dirtyRect = [self _dirtyRect];
1397             displayRect = NSIntersectionRect(displayRect, dirtyRect);
1398         }
1399         if (!NSIsEmptyRect(displayRect)) {
1400             [self _layoutIfNeeded];
1401         }
1402     }
1403
1404     [super _web_layoutIfNeededRecursive:displayRect testDirtyRect:NO];
1405 }
1406
1407 - (NSRect)_selectionRect
1408 {
1409     return [[self _bridge] selectionRect];
1410 }
1411
1412 - (void)_startAutoscrollTimer: (NSEvent *)triggerEvent
1413 {
1414     if (_private->autoscrollTimer == nil) {
1415         _private->autoscrollTimer = [[NSTimer scheduledTimerWithTimeInterval:AUTOSCROLL_INTERVAL
1416             target:self selector:@selector(_autoscroll) userInfo:nil repeats:YES] retain];
1417         _private->autoscrollTriggerEvent = [triggerEvent retain];
1418     }
1419 }
1420
1421 - (void)_stopAutoscrollTimer
1422 {
1423     NSTimer *timer = _private->autoscrollTimer;
1424     _private->autoscrollTimer = nil;
1425     [_private->autoscrollTriggerEvent release];
1426     _private->autoscrollTriggerEvent = nil;
1427     [timer invalidate];
1428     [timer release];
1429 }
1430
1431 - (void)_autoscroll
1432 {
1433     int isStillDown;
1434
1435     // Guarantee that the autoscroll timer is invalidated, even if we don't receive
1436     // a mouse up event.
1437     PSstilldown([_private->autoscrollTriggerEvent eventNumber], &isStillDown);
1438     if (!isStillDown){
1439         [self _stopAutoscrollTimer];
1440         return;
1441     }
1442
1443     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSLeftMouseDragged
1444         location:[[self window] convertScreenToBase:[NSEvent mouseLocation]]
1445         modifierFlags:[[NSApp currentEvent] modifierFlags]
1446         timestamp:[NSDate timeIntervalSinceReferenceDate]
1447         windowNumber:[[self window] windowNumber]
1448         context:[[NSApp currentEvent] context]
1449         eventNumber:0 clickCount:0 pressure:0];
1450     [self mouseDragged:fakeEvent];
1451 }
1452
1453 - (BOOL)_canCopy
1454 {
1455     // Copying can be done regardless of whether you can edit.
1456     return [self _hasSelection];
1457 }
1458
1459 - (BOOL)_canCut
1460 {
1461     return [self _hasSelection] && [self _isEditable];
1462 }
1463
1464 - (BOOL)_canDelete
1465 {
1466     return [self _hasSelection] && [self _isEditable];
1467 }
1468
1469 - (BOOL)_canPaste
1470 {
1471     return [self _hasSelectionOrInsertionPoint] && [self _isEditable];
1472 }
1473
1474 - (BOOL)_canEdit
1475 {
1476     return [self _hasSelectionOrInsertionPoint] && [self _isEditable];
1477 }
1478
1479 - (BOOL)_hasSelection
1480 {
1481     return [[self _bridge] selectionState] == WebSelectionStateRange;
1482 }
1483
1484 - (BOOL)_hasSelectionOrInsertionPoint
1485 {
1486     return [[self _bridge] selectionState] != WebSelectionStateNone;
1487 }
1488
1489 - (BOOL)_isEditable
1490 {
1491     return [[self _webView] isEditable] || [[self _bridge] isSelectionEditable];
1492 }
1493
1494 - (BOOL)_isSelectionMisspelled
1495 {
1496     NSString *selectedString = [self selectedString];
1497     unsigned length = [selectedString length];
1498     if (length == 0) {
1499         return NO;
1500     }
1501     NSRange range = [[NSSpellChecker sharedSpellChecker] checkSpellingOfString:selectedString
1502                                                                     startingAt:0
1503                                                                       language:nil
1504                                                                           wrap:NO
1505                                                         inSpellDocumentWithTag:[[self _webView] spellCheckerDocumentTag]
1506                                                                      wordCount:NULL];
1507     return range.length == length;
1508 }
1509
1510 - (NSArray *)_guessesForMisspelledSelection
1511 {
1512     ASSERT([[self selectedString] length] != 0);
1513     return [[NSSpellChecker sharedSpellChecker] guessesForWord:[self selectedString]];
1514 }
1515
1516 - (void)_changeSpellingFromMenu:(id)sender
1517 {
1518     ASSERT([[self selectedString] length] != 0);
1519     [[self _bridge] replaceSelectionWithText:[sender title] selectReplacement:YES smartReplace:NO];
1520 }
1521
1522 - (void)_ignoreSpellingFromMenu:(id)sender
1523 {
1524     ASSERT([[self selectedString] length] != 0);
1525     [[NSSpellChecker sharedSpellChecker] ignoreWord:[self selectedString] inSpellDocumentWithTag:[[self _webView] spellCheckerDocumentTag]];
1526 }
1527
1528 - (void)_learnSpellingFromMenu:(id)sender
1529 {
1530     ASSERT([[self selectedString] length] != 0);
1531     [[NSSpellChecker sharedSpellChecker] learnWord:[self selectedString]];
1532 }
1533
1534 #ifndef OMIT_TIGER_FEATURES
1535 - (void)_searchWithGoogleFromMenu:(id)sender
1536 {
1537     // This should only be called when there's a selection, but play it safe.
1538     if (![self _hasSelection]) {
1539         return;
1540     }
1541
1542     NSPasteboard *pboard = [NSPasteboard pasteboardWithUniqueName];
1543     if ([self writeSelectionToPasteboard:pboard types:[NSArray arrayWithObject:NSStringPboardType]]) {
1544         // FIXME: seems fragile to use the service by name, but this is what AppKit does
1545         NSPerformService(@"Search With Google", pboard);
1546     }
1547 }
1548
1549 - (void)_searchWithSpotlightFromMenu:(id)sender
1550 {
1551     // This should only be called when there's a selection, but play it safe.
1552     if (![self _hasSelection]) {
1553         return;
1554     }
1555
1556     (void)HISearchWindowShow((CFStringRef)[self selectedString], kNilOptions);
1557 }
1558 - (void)_lookUpInDictionaryFromMenu:(id)sender
1559 {
1560     // This should only be called when there's a selection, but play it safe.
1561     if (![self _hasSelection]) {
1562         return;
1563     }
1564
1565     // Soft link to dictionary-display function to avoid linking another framework (ApplicationServices/LangAnalysis)
1566     static OSStatus (*__dictionaryServiceWindowShow)(id inWordString, NSRect inWordBoundary, UInt16 inLineDirection) = NULL;
1567     static const struct mach_header *frameworkImageHeader = NULL;
1568     static BOOL lookedForFunction = NO;
1569     if (!lookedForFunction) {
1570         __dictionaryServiceWindowShow = _NSSoftLinkingGetFrameworkFuncPtr(@"ApplicationServices", @"LangAnalysis", "_DCMDictionaryServiceWindowShow", &frameworkImageHeader);
1571         lookedForFunction = YES;
1572     }
1573     if (!__dictionaryServiceWindowShow) {
1574         ERROR("Couldn't find _DCMDictionaryServiceWindowShow");
1575         return;
1576     }
1577
1578     // FIXME: must check for right-to-left here
1579     NSWritingDirection writingDirection = NSWritingDirectionLeftToRight;
1580
1581     NSAttributedString *attrString = [self selectedAttributedString];
1582     // FIXME: the dictionary API expects the rect for the first line of selection. Passing
1583     // the rect for the entire selection, as we do here, positions the pop-up window near
1584     // the bottom of the selection rather than at the selected word.
1585     NSRect rect = [self convertRect:[[self _bridge] visibleSelectionRect] toView:nil];
1586     rect.origin = [[self window] convertBaseToScreen:rect.origin];
1587     NSData *data = [attrString RTFFromRange:NSMakeRange(0, [attrString length]) documentAttributes:nil];
1588     (void)__dictionaryServiceWindowShow(data, rect, (writingDirection == NSWritingDirectionRightToLeft) ? 1 : 0);
1589 }
1590 #endif
1591
1592 #if APPKIT_CODE_FOR_REFERENCE
1593
1594 - (void)_openLinkFromMenu:(id)sender
1595 {
1596     NSTextStorage *text = _getTextStorage(self);
1597     NSRange charRange = [self selectedRange];
1598     if (charRange.location != NSNotFound && charRange.length > 0) {
1599         id link = [text attribute:NSLinkAttributeName atIndex:charRange.location effectiveRange:NULL];
1600         if (link) {
1601             [self clickedOnLink:link atIndex:charRange.location];
1602         } else {
1603             NSString *string = [[text string] substringWithRange:charRange];
1604             link = [NSURL URLWithString:string];
1605             if (link) [[NSWorkspace sharedWorkspace] openURL:link];
1606         }
1607     }
1608 }
1609
1610 #endif
1611
1612 - (BOOL)_transparentBackground
1613 {
1614     return _private->transparentBackground;
1615 }
1616
1617 - (void)_setTransparentBackground:(BOOL)f
1618 {
1619     _private->transparentBackground = f;
1620 }
1621
1622 - (NSImage *)_selectionDraggingImage
1623 {
1624     if ([self _hasSelection]) {
1625         NSImage *dragImage = [[self _bridge] selectionImage];
1626         [dragImage _web_dissolveToFraction:WebDragImageAlpha];
1627         return dragImage;
1628     }
1629     return nil;
1630 }
1631
1632 - (NSRect)_selectionDraggingRect
1633 {
1634     if ([self _hasSelection]) {
1635         return [[self _bridge] visibleSelectionRect];
1636     }
1637     return NSZeroRect;
1638 }
1639
1640 @end
1641
1642 @implementation NSView (WebHTMLViewFileInternal)
1643
1644 - (void)_web_setPrintingModeRecursive
1645 {
1646     [_subviews makeObjectsPerformSelector:@selector(_web_setPrintingModeRecursive)];
1647 }
1648
1649 - (void)_web_clearPrintingModeRecursive
1650 {
1651     [_subviews makeObjectsPerformSelector:@selector(_web_clearPrintingModeRecursive)];
1652 }
1653
1654 - (void)_web_layoutIfNeededRecursive
1655 {
1656     [_subviews makeObjectsPerformSelector:@selector(_web_layoutIfNeededRecursive)];
1657 }
1658
1659 - (void)_web_layoutIfNeededRecursive: (NSRect)rect testDirtyRect:(bool)testDirtyRect
1660 {
1661     unsigned index, count;
1662     for (index = 0, count = [_subviews count]; index < count; index++) {
1663         NSView *subview = [_subviews objectAtIndex:index];
1664         NSRect dirtiedSubviewRect = [subview convertRect: rect fromView: self];
1665         [subview _web_layoutIfNeededRecursive: dirtiedSubviewRect testDirtyRect:testDirtyRect];
1666     }
1667 }
1668
1669 @end
1670
1671 @implementation NSMutableDictionary (WebHTMLViewFileInternal)
1672
1673 - (void)_web_setObjectIfNotNil:(id)object forKey:(id)key
1674 {
1675     if (object == nil) {
1676         [self removeObjectForKey:key];
1677     } else {
1678         [self setObject:object forKey:key];
1679     }
1680 }
1681
1682 @end
1683
1684 // The following is a workaround for
1685 // <rdar://problem/3429631> window stops getting mouse moved events after first tooltip appears
1686 // The trick is to define a category on NSToolTipPanel that implements setAcceptsMouseMovedEvents:.
1687 // Since the category will be searched before the real class, we'll prevent the flag from being
1688 // set on the tool tip panel.
1689
1690 @interface NSToolTipPanel : NSPanel
1691 @end
1692
1693 @interface NSToolTipPanel (WebHTMLViewFileInternal)
1694 @end
1695
1696 @implementation NSToolTipPanel (WebHTMLViewFileInternal)
1697
1698 - (void)setAcceptsMouseMovedEvents:(BOOL)flag
1699 {
1700     // Do nothing, preventing the tool tip panel from trying to accept mouse-moved events.
1701 }
1702
1703 @end
1704
1705
1706 @interface WebHTMLView (TextSizing) <_web_WebDocumentTextSizing>
1707 @end
1708
1709 @interface NSArray (WebHTMLView)
1710 - (void)_web_makePluginViewsPerformSelector:(SEL)selector withObject:(id)object;
1711 @end
1712
1713 @implementation WebHTMLView
1714
1715 + (void)initialize
1716 {
1717     WebKitInitializeUnicode();
1718     [NSApp registerServicesMenuSendTypes:[[self class] _selectionPasteboardTypes]
1719                              returnTypes:[[self class] _insertablePasteboardTypes]];
1720     _NSInitializeKillRing();
1721 }
1722
1723 - (void)_resetCachedWebPreferences:(NSNotification *)ignored
1724 {
1725     WebPreferences *preferences = [[self _webView] preferences];
1726     // Check for nil because we might not yet have an associated webView when this is called
1727     if (preferences == nil) {
1728         preferences = [WebPreferences standardPreferences];
1729     }
1730     _private->showsURLsInToolTips = [preferences showsURLsInToolTips];
1731 }
1732
1733 - (id)initWithFrame:(NSRect)frame
1734 {
1735     [super initWithFrame:frame];
1736
1737     // Make all drawing go through us instead of subviews.
1738     if (NSAppKitVersionNumber >= 711) {
1739         [self _setDrawsOwnDescendants:YES];
1740     }
1741
1742     _private = [[WebHTMLViewPrivate alloc] init];
1743
1744     _private->pluginController = [[WebPluginController alloc] initWithDocumentView:self];
1745     _private->needsLayout = YES;
1746     [self _resetCachedWebPreferences:nil];
1747     [[NSNotificationCenter defaultCenter]
1748             addObserver:self selector:@selector(_resetCachedWebPreferences:)
1749                    name:WebPreferencesChangedNotification object:nil];
1750
1751     return self;
1752 }
1753
1754 - (void)dealloc
1755 {
1756     [self _clearLastHitViewIfSelf];
1757     [self _reset];
1758     [[NSNotificationCenter defaultCenter] removeObserver:self];
1759     [_private->pluginController destroyAllPlugins];
1760     [_private release];
1761     _private = nil;
1762     [super dealloc];
1763 }
1764
1765 - (void)finalize
1766 {
1767     [self _clearLastHitViewIfSelf];
1768     [self _reset];
1769     [[NSNotificationCenter defaultCenter] removeObserver:self];
1770     [_private->pluginController destroyAllPlugins];
1771     _private = nil;
1772     [super finalize];
1773 }
1774
1775 - (IBAction)takeFindStringFromSelection:(id)sender
1776 {
1777     if (![self _hasSelection]) {
1778         NSBeep();
1779         return;
1780     }
1781
1782     [NSPasteboard _web_setFindPasteboardString:[self selectedString] withOwner:self];
1783 }
1784
1785 - (NSArray *)pasteboardTypesForSelection
1786 {
1787     if ([self _canSmartCopyOrDelete]) {
1788         NSMutableArray *types = [[[[self class] _selectionPasteboardTypes] mutableCopy] autorelease];
1789         [types addObject:WebSmartPastePboardType];
1790         return types;
1791     } else {
1792         return [[self class] _selectionPasteboardTypes];
1793     }
1794 }
1795
1796 - (void)writeSelectionWithPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard
1797 {
1798     [self _writeSelectionWithPasteboardTypes:types toPasteboard:pasteboard cachedAttributedString:nil];
1799 }
1800
1801 - (BOOL)writeSelectionToPasteboard:(NSPasteboard *)pasteboard types:(NSArray *)types
1802 {
1803     [pasteboard declareTypes:types owner:nil];
1804     [self writeSelectionWithPasteboardTypes:types toPasteboard:pasteboard];
1805     return YES;
1806 }
1807
1808 - (BOOL)readSelectionFromPasteboard:(NSPasteboard *)pasteboard
1809 {
1810     [self _pasteWithPasteboard:pasteboard allowPlainText:YES];
1811     return YES;
1812 }
1813
1814 - (id)validRequestorForSendType:(NSString *)sendType returnType:(NSString *)returnType
1815 {
1816     if (sendType != nil && [[self pasteboardTypesForSelection] containsObject:sendType] && [self _hasSelection]) {
1817         return self;
1818     } else if (returnType != nil && [[[self class] _insertablePasteboardTypes] containsObject:returnType] && [self _isEditable]) {
1819         return self;
1820     }
1821     return [[self nextResponder] validRequestorForSendType:sendType returnType:returnType];
1822 }
1823
1824 - (void)selectAll:(id)sender
1825 {
1826     [self selectAll];
1827 }
1828
1829 - (void)jumpToSelection:(id)sender
1830 {
1831     [[self _bridge] jumpToSelection];
1832 }
1833
1834 - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)item
1835 {
1836     SEL action = [item action];
1837     WebBridge *bridge = [self _bridge];
1838
1839     if (action == @selector(alignCenter:)
1840             || action == @selector(alignLeft:)
1841             || action == @selector(alignJustified:)
1842             || action == @selector(alignRight:)
1843             || action == @selector(changeAttributes:)
1844             || action == @selector(changeBaseWritingDirection:) // FIXME: check menu item based on writing direction
1845             || action == @selector(changeColor:)
1846             || action == @selector(changeFont:)
1847             || action == @selector(changeSpelling:)
1848             || action == @selector(_changeSpellingFromMenu:)
1849             || action == @selector(checkSpelling:)
1850             || action == @selector(complete:)
1851             || action == @selector(deleteBackward:)
1852             || action == @selector(deleteBackwardByDecomposingPreviousCharacter:)
1853             || action == @selector(deleteForward:)
1854             || action == @selector(deleteToBeginningOfLine:)
1855             || action == @selector(deleteToBeginningOfParagraph:)
1856             || action == @selector(deleteToEndOfLine:)
1857             || action == @selector(deleteToEndOfParagraph:)
1858             || action == @selector(deleteToMark:)
1859             || action == @selector(deleteWordBackward:)
1860             || action == @selector(deleteWordForward:)
1861             || action == @selector(insertBacktab:)
1862             || action == @selector(insertLineBreak:)
1863             || action == @selector(insertNewline:)
1864             || action == @selector(insertNewlineIgnoringFieldEditor:)
1865             || action == @selector(insertParagraphSeparator:)
1866             || action == @selector(insertTab:)
1867             || action == @selector(insertTabIgnoringFieldEditor:)
1868             || action == @selector(moveBackward:)
1869             || action == @selector(moveBackwardAndModifySelection:)
1870             || action == @selector(moveDown:)
1871             || action == @selector(moveDownAndModifySelection:)
1872             || action == @selector(moveForward:)
1873             || action == @selector(moveForwardAndModifySelection:)
1874             || action == @selector(moveLeft:)
1875             || action == @selector(moveLeftAndModifySelection:)
1876             || action == @selector(moveParagraphBackwardAndModifySelection:)
1877             || action == @selector(moveParagraphForwardAndModifySelection:)
1878             || action == @selector(moveRight:)
1879             || action == @selector(moveRightAndModifySelection:)
1880             || action == @selector(moveToBeginningOfDocument:)
1881             || action == @selector(moveToBeginningOfDocumentAndModifySelection:)
1882             || action == @selector(moveToBeginningOfLine:)
1883             || action == @selector(moveToBeginningOfLineAndModifySelection:)
1884             || action == @selector(moveToBeginningOfParagraph:)
1885             || action == @selector(moveToBeginningOfParagraphAndModifySelection:)
1886             || action == @selector(moveToEndOfDocument:)
1887             || action == @selector(moveToEndOfDocumentAndModifySelection:)
1888             || action == @selector(moveToEndOfLine:)
1889             || action == @selector(moveToEndOfLineAndModifySelection:)
1890             || action == @selector(moveToEndOfParagraph:)
1891             || action == @selector(moveToEndOfParagraphAndModifySelection:)
1892             || action == @selector(moveUp:)
1893             || action == @selector(moveUpAndModifySelection:)
1894             || action == @selector(moveWordBackward:)
1895             || action == @selector(moveWordBackwardAndModifySelection:)
1896             || action == @selector(moveWordForward:)
1897             || action == @selector(moveWordForwardAndModifySelection:)
1898             || action == @selector(moveWordLeft:)
1899             || action == @selector(moveWordLeftAndModifySelection:)
1900             || action == @selector(moveWordRight:)
1901             || action == @selector(moveWordRightAndModifySelection:)
1902             || action == @selector(pageDown:)
1903             || action == @selector(pageDownAndModifySelection:)
1904             || action == @selector(pageUp:)
1905             || action == @selector(pageUpAndModifySelection:)
1906             || action == @selector(pasteFont:)
1907             || action == @selector(showGuessPanel:)
1908             || action == @selector(toggleBaseWritingDirection:)
1909             || action == @selector(transpose:)
1910             || action == @selector(yank:)
1911             || action == @selector(yankAndSelect:)) {
1912         return [self _canEdit];
1913     } else if (action == @selector(capitalizeWord:)
1914                || action == @selector(lowercaseWord:)
1915                || action == @selector(uppercaseWord:)) {
1916         return [self _hasSelection] && [self _isEditable];
1917     } else if (action == @selector(centerSelectionInVisibleArea:)
1918             || action == @selector(copyFont:)
1919             || action == @selector(setMark:)) {
1920         return [self _hasSelectionOrInsertionPoint];
1921     } else if (action == @selector(changeDocumentBackgroundColor:)) {
1922         return [[self _webView] isEditable];
1923     } else if (action == @selector(copy:)) {
1924         return [bridge mayDHTMLCopy] || [self _canCopy];
1925     } else if (action == @selector(cut:)) {
1926         return [bridge mayDHTMLCut] || [self _canDelete];
1927     } else if (action == @selector(delete:)) {
1928         return [self _canDelete];
1929     } else if (action == @selector(_ignoreSpellingFromMenu:)
1930             || action == @selector(jumpToSelection:)
1931             || action == @selector(_learnSpellingFromMenu:)
1932             || action == @selector(takeFindStringFromSelection:)) {
1933         return [self _hasSelection];
1934     } else if (action == @selector(paste:) || action == @selector(pasteAsPlainText:) || action == @selector(pasteAsRichText:)) {
1935         return [bridge mayDHTMLPaste] || [self _canPaste];
1936     } else if (action == @selector(performFindPanelAction:)) {
1937         // FIXME: Not yet implemented.
1938         return NO;
1939     } else if (action == @selector(selectToMark:)
1940             || action == @selector(swapWithMark:)) {
1941         return [self _hasSelectionOrInsertionPoint] && [[self _bridge] markDOMRange] != nil;
1942     } else if (action == @selector(subscript:)) {
1943         NSMenuItem *menuItem = (NSMenuItem *)item;
1944         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
1945             DOMCSSStyleDeclaration *style = [self _emptyStyle];
1946             [style setVerticalAlign:@"sub"];
1947             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
1948         }
1949         return [self _canEdit];
1950     } else if (action == @selector(superscript:)) {
1951         NSMenuItem *menuItem = (NSMenuItem *)item;
1952         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
1953             DOMCSSStyleDeclaration *style = [self _emptyStyle];
1954             [style setVerticalAlign:@"super"];
1955             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
1956         }
1957         return [self _canEdit];
1958     } else if (action == @selector(underline:)) {
1959         NSMenuItem *menuItem = (NSMenuItem *)item;
1960         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
1961             DOMCSSStyleDeclaration *style = [self _emptyStyle];
1962             [style setProperty:@"-khtml-text-decorations-in-effect" :@"underline" :@""];
1963             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
1964         }
1965         return [self _canEdit];
1966     } else if (action == @selector(unscript:)) {
1967         NSMenuItem *menuItem = (NSMenuItem *)item;
1968         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
1969             DOMCSSStyleDeclaration *style = [self _emptyStyle];
1970             [style setVerticalAlign:@"baseline"];
1971             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
1972         }
1973         return [self _canEdit];
1974 #ifndef OMIT_TIGER_FEATURES
1975     } else if (action == @selector(_searchWithSpotlightFromMenu:)
1976                || action == @selector(_searchWithGoogleFromMenu:)
1977                || action == @selector(_lookUpInDictionaryFromMenu:)) {
1978         return [self _hasSelection];
1979 #endif
1980     }
1981
1982     return YES;
1983 }
1984
1985 - (BOOL)acceptsFirstResponder
1986 {
1987     // Don't accept first responder when we first click on this view.
1988     // We have to pass the event down through WebCore first to be sure we don't hit a subview.
1989     // Do accept first responder at any other time, for example from keyboard events,
1990     // or from calls back from WebCore once we begin mouse-down event handling.
1991     NSEvent *event = [NSApp currentEvent];
1992     if ([event type] == NSLeftMouseDown
1993             && !_private->handlingMouseDownEvent
1994             && NSPointInRect([event locationInWindow], [self convertRect:[self visibleRect] toView:nil])) {
1995         return NO;
1996     }
1997     return YES;
1998 }
1999
2000 - (BOOL)maintainsInactiveSelection
2001 {
2002     // This method helps to determing whether the view should maintain
2003     // an inactive selection when the view is not first responder.
2004     // Traditionally, these views have not maintained such selections,
2005     // clearing them when the view was not first responder. However,
2006     // to fix bugs like this one:
2007     // <rdar://problem/3672088>: "Editable WebViews should maintain a selection even
2008     //                            when they're not firstResponder"
2009     // it was decided to add a switch to act more like an NSTextView.
2010     // For now, however, the view only acts in this way when the
2011     // web view is set to be editable. This will maintain traditional
2012     // behavior for WebKit clients dating back to before this change,
2013     // and will likely be a decent switch for the long term, since
2014     // clients to ste the web view to be editable probably want it
2015     // to act like a "regular" Cocoa view in terms of its selection
2016     // behavior.
2017     id nextResponder = [[self window] _newFirstResponderAfterResigning];
2018
2019     // Predict the case where we are losing first responder status only to
2020     // gain it back again.  Want to keep the selection in that case.
2021     if ([nextResponder isKindOfClass:[NSScrollView class]]) {
2022         id contentView = [nextResponder contentView];
2023         if (contentView) {
2024             nextResponder = contentView;
2025         }
2026     }
2027     if ([nextResponder isKindOfClass:[NSClipView class]]) {
2028         id documentView = [nextResponder documentView];
2029         if (documentView) {
2030             nextResponder = documentView;
2031         }
2032     }
2033
2034     if (nextResponder == self)
2035         return YES;
2036
2037     // non-editable views lose selection whenever losing first responder status
2038     if (![[self _webView] isEditable])
2039         return NO;
2040
2041     // editable views lose selection when losing first responder status
2042     // to a widget in the same page, but not otherwise
2043     BOOL loseSelection = [nextResponder isKindOfClass:[NSView class]]
2044         && [nextResponder isDescendantOf:[self _webView]];
2045
2046     return !loseSelection;
2047 }
2048
2049 - (void)addMouseMovedObserver
2050 {
2051     // Always add a mouse move observer if the DB requested, or if we're the key window.
2052     if (([[self window] isKeyWindow] && ![self _insideAnotherHTMLView]) ||
2053         [[self _webView] _dashboardBehavior:WebDashboardBehaviorAlwaysSendMouseEventsToAllWindows]){
2054         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(mouseMovedNotification:)
2055             name:NSMouseMovedNotification object:nil];
2056         [self _frameOrBoundsChanged];
2057     }
2058 }
2059
2060 - (void)removeMouseMovedObserver
2061 {
2062     // Don't remove the observer if we're running the DB
2063     if ([[self _webView] _dashboardBehavior:WebDashboardBehaviorAlwaysSendMouseEventsToAllWindows])
2064         return;
2065
2066     [[self _webView] _mouseDidMoveOverElement:nil modifierFlags:0];
2067     [[NSNotificationCenter defaultCenter] removeObserver:self
2068         name:NSMouseMovedNotification object:nil];
2069 }
2070
2071 - (void)updateFocusState
2072 {
2073     // This method does the job of updating the view based on the view's firstResponder-ness and
2074     // the window key-ness of the window containing this view. This involves three kinds of
2075     // drawing updates right now, all handled in WebCore in response to the call over the bridge.
2076     //
2077     // The three display attributes are as follows:
2078     //
2079     // 1. The background color used to draw behind selected content (active | inactive color)
2080     // 2. Caret blinking (blinks | does not blink)
2081     // 3. The drawing of a focus ring around links in web pages.
2082     //
2083     // Also, this is responsible for letting the bridge know if the window has gained or lost focus
2084     // so we can send focus and blur events.
2085
2086     WebBridge *bridge = [self _bridge];
2087     BOOL windowIsKey = [[self window] isKeyWindow];
2088
2089     BOOL flag = !_private->resigningFirstResponder && windowIsKey && [self _web_firstResponderCausesFocusDisplay];
2090     [bridge setDisplaysWithFocusAttributes:flag];
2091
2092     [bridge setWindowHasFocus:windowIsKey];
2093 }
2094
2095 - (void)addSuperviewObservers
2096 {
2097     // We watch the bounds of our superview, so that we can do a layout when the size
2098     // of the superview changes. This is different from other scrollable things that don't
2099     // need this kind of thing because their layout doesn't change.
2100
2101     // We need to pay attention to both height and width because our "layout" has to change
2102     // to extend the background the full height of the space and because some elements have
2103     // sizes that are based on the total size of the view.
2104
2105     NSView *superview = [self superview];
2106     if (superview && [self window]) {
2107         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_frameOrBoundsChanged)
2108             name:NSViewFrameDidChangeNotification object:superview];
2109         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_frameOrBoundsChanged)
2110             name:NSViewBoundsDidChangeNotification object:superview];
2111     }
2112 }
2113
2114 - (void)removeSuperviewObservers
2115 {
2116     NSView *superview = [self superview];
2117     if (superview && [self window]) {
2118         [[NSNotificationCenter defaultCenter] removeObserver:self
2119             name:NSViewFrameDidChangeNotification object:superview];
2120         [[NSNotificationCenter defaultCenter] removeObserver:self
2121             name:NSViewBoundsDidChangeNotification object:superview];
2122     }
2123 }
2124
2125 - (void)addWindowObservers
2126 {
2127     NSWindow *window = [self window];
2128     if (window) {
2129         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidBecomeKey:)
2130             name:NSWindowDidBecomeKeyNotification object:window];
2131         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidResignKey:)
2132             name:NSWindowDidResignKeyNotification object:window];
2133         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowWillClose:)
2134             name:NSWindowWillCloseNotification object:window];
2135     }
2136 }
2137
2138 - (void)removeWindowObservers
2139 {
2140     NSWindow *window = [self window];
2141     if (window) {
2142         [[NSNotificationCenter defaultCenter] removeObserver:self
2143             name:NSWindowDidBecomeKeyNotification object:window];
2144         [[NSNotificationCenter defaultCenter] removeObserver:self
2145             name:NSWindowDidResignKeyNotification object:window];
2146         [[NSNotificationCenter defaultCenter] removeObserver:self
2147             name:NSWindowWillCloseNotification object:window];
2148     }
2149 }
2150
2151 - (void)viewWillMoveToSuperview:(NSView *)newSuperview
2152 {
2153     [self removeSuperviewObservers];
2154 }
2155
2156 - (void)viewDidMoveToSuperview
2157 {
2158     // Do this here in case the text size multiplier changed when a non-HTML
2159     // view was installed.
2160     if ([self superview] != nil) {
2161         [self _updateTextSizeMultiplier];
2162         [self addSuperviewObservers];
2163     }
2164 }
2165
2166 - (void)viewWillMoveToWindow:(NSWindow *)window
2167 {
2168     // Don't do anything if we aren't initialized.  This happens
2169     // when decoding a WebView.  When WebViews are decoded their subviews
2170     // are created by initWithCoder: and so won't be normally
2171     // initialized.  The stub views are discarded by WebView.
2172     if (_private){
2173         // FIXME: Some of these calls may not work because this view may be already removed from it's superview.
2174         [self removeMouseMovedObserver];
2175         [self removeWindowObservers];
2176         [self removeSuperviewObservers];
2177         [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(_updateMouseoverWithFakeEvent) object:nil];
2178
2179         [[self _pluginController] stopAllPlugins];
2180     }
2181 }
2182
2183 - (void)viewDidMoveToWindow
2184 {
2185     // Don't do anything if we aren't initialized.  This happens
2186     // when decoding a WebView.  When WebViews are decoded their subviews
2187     // are created by initWithCoder: and so won't be normally
2188     // initialized.  The stub views are discarded by WebView.
2189     if (_private) {
2190         [self _stopAutoscrollTimer];
2191         if ([self window]) {
2192             _private->lastScrollPosition = [[self superview] bounds].origin;
2193             [self addWindowObservers];
2194             [self addSuperviewObservers];
2195             [self addMouseMovedObserver];
2196
2197             // Schedule this update, rather than making the call right now.
2198             // The reason is that placing the caret in the just-installed view requires
2199             // the HTML/XML document to be available on the WebCore side, but it is not
2200             // at the time this code is running. However, it will be there on the next
2201             // crank of the run loop. Doing this helps to make a blinking caret appear
2202             // in a new, empty window "automatic".
2203             [self performSelector:@selector(updateFocusState) withObject:nil afterDelay:0];
2204
2205             [[self _pluginController] startAllPlugins];
2206
2207             _private->lastScrollPosition = NSZeroPoint;
2208
2209             _private->inWindow = YES;
2210         } else {
2211             // Reset when we are moved out of a window after being moved into one.
2212             // Without this check, we reset ourselves before we even start.
2213             // This is only needed because viewDidMoveToWindow is called even when
2214             // the window is not changing (bug in AppKit).
2215             if (_private->inWindow) {
2216                 [self _reset];
2217                 _private->inWindow = NO;
2218             }
2219         }
2220     }
2221 }
2222
2223 - (void)viewWillMoveToHostWindow:(NSWindow *)hostWindow
2224 {
2225     [[self subviews] _web_makePluginViewsPerformSelector:@selector(viewWillMoveToHostWindow:) withObject:hostWindow];
2226 }
2227
2228 - (void)viewDidMoveToHostWindow
2229 {
2230     [[self subviews] _web_makePluginViewsPerformSelector:@selector(viewDidMoveToHostWindow) withObject:nil];
2231 }
2232
2233
2234 - (void)addSubview:(NSView *)view
2235 {
2236     [super addSubview:view];
2237
2238     if ([WebPluginController isPlugInView:view]) {
2239         [[self _pluginController] addPlugin:view];
2240     }
2241 }
2242
2243 - (void)reapplyStyles
2244 {
2245     if (!_private->needsToApplyStyles) {
2246         return;
2247     }
2248
2249 #ifdef _KWQ_TIMING
2250     double start = CFAbsoluteTimeGetCurrent();
2251 #endif
2252
2253     [[self _bridge] reapplyStylesForDeviceType:
2254         _private->printing ? WebCoreDevicePrinter : WebCoreDeviceScreen];
2255
2256 #ifdef _KWQ_TIMING
2257     double thisTime = CFAbsoluteTimeGetCurrent() - start;
2258     LOG(Timing, "%s apply style seconds = %f", [self URL], thisTime);
2259 #endif
2260
2261     _private->needsToApplyStyles = NO;
2262 }
2263
2264 // Do a layout, but set up a new fixed width for the purposes of doing printing layout.
2265 // minPageWidth==0 implies a non-printing layout
2266 - (void)layoutToMinimumPageWidth:(float)minPageWidth maximumPageWidth:(float)maxPageWidth adjustingViewSize:(BOOL)adjustViewSize
2267 {
2268     [self reapplyStyles];
2269
2270     // Ensure that we will receive mouse move events.  Is this the best place to put this?
2271     [[self window] setAcceptsMouseMovedEvents: YES];
2272     [[self window] _setShouldPostEventNotifications: YES];
2273
2274     if (!_private->needsLayout) {
2275         return;
2276     }
2277
2278 #ifdef _KWQ_TIMING
2279     double start = CFAbsoluteTimeGetCurrent();
2280 #endif
2281
2282     LOG(View, "%@ doing layout", self);
2283
2284     if (minPageWidth > 0.0) {
2285         [[self _bridge] forceLayoutWithMinimumPageWidth:minPageWidth maximumPageWidth:maxPageWidth adjustingViewSize:adjustViewSize];
2286     } else {
2287         [[self _bridge] forceLayoutAdjustingViewSize:adjustViewSize];
2288     }
2289     _private->needsLayout = NO;
2290
2291     if (!_private->printing) {
2292         // get size of the containing dynamic scrollview, so
2293         // appearance and disappearance of scrollbars will not show up
2294         // as a size change
2295         NSSize newLayoutFrameSize = [[[self superview] superview] frame].size;
2296         if (_private->laidOutAtLeastOnce && !NSEqualSizes(_private->lastLayoutFrameSize, newLayoutFrameSize)) {
2297             [[self _bridge] sendResizeEvent];
2298         }
2299         _private->laidOutAtLeastOnce = YES;
2300         _private->lastLayoutSize = [(NSClipView *)[self superview] documentVisibleRect].size;
2301         _private->lastLayoutFrameSize = newLayoutFrameSize;
2302     }
2303
2304 #ifdef _KWQ_TIMING
2305     double thisTime = CFAbsoluteTimeGetCurrent() - start;
2306     LOG(Timing, "%s layout seconds = %f", [self URL], thisTime);
2307 #endif
2308 }
2309
2310 - (void)layout
2311 {
2312     [self layoutToMinimumPageWidth:0.0 maximumPageWidth:0.0 adjustingViewSize:NO];
2313 }
2314
2315 - (NSMenu *)menuForEvent:(NSEvent *)event
2316 {
2317     [_private->compController endRevertingChange:NO moveLeft:NO];
2318
2319     if ([[self _bridge] sendContextMenuEvent:event]) {
2320         return nil;
2321     }
2322     NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
2323     NSDictionary *element = [self elementAtPoint:point];
2324     return [[self _webView] _menuForElement:element];
2325 }
2326
2327 // Search from the end of the currently selected location, or from the beginning of the
2328 // document if nothing is selected.
2329 - (BOOL)searchFor:(NSString *)string direction:(BOOL)forward caseSensitive:(BOOL)caseFlag wrap:(BOOL)wrapFlag;
2330 {
2331     return [[self _bridge] searchFor:string direction:forward caseSensitive:caseFlag wrap:wrapFlag];
2332 }
2333
2334 - (DOMRange *)_documentRange
2335 {
2336     return [[[self _bridge] DOMDocument] _documentRange];
2337 }
2338
2339 - (NSString *)string
2340 {
2341     return [[self _bridge] stringForRange:[self _documentRange]];
2342 }
2343
2344 - (NSAttributedString *)_attributeStringFromDOMRange:(DOMRange *)range
2345 {
2346     NSAttributedString *attributedString = nil;
2347 #ifdef USE_APPKIT_FOR_ATTRIBUTED_STRINGS
2348 #if !LOG_DISABLED
2349     double start = CFAbsoluteTimeGetCurrent();
2350 #endif
2351     attributedString = [[[NSAttributedString alloc] _initWithDOMRange:range] autorelease];
2352 #if !LOG_DISABLED
2353     double duration = CFAbsoluteTimeGetCurrent() - start;
2354     LOG(Timing, "creating attributed string from selection took %f seconds.", duration);
2355 #endif
2356 #endif
2357     return attributedString;
2358 }
2359
2360 - (NSAttributedString *)attributedString
2361 {
2362     WebBridge *bridge = [self _bridge];
2363     DOMDocument *document = [bridge DOMDocument];
2364     NSAttributedString *attributedString = [self _attributeStringFromDOMRange:[document _documentRange]];
2365     if (attributedString == nil) {
2366         attributedString = [bridge attributedStringFrom:document startOffset:0 to:nil endOffset:0];
2367     }
2368     return attributedString;
2369 }
2370
2371 - (NSString *)selectedString
2372 {
2373     return [[self _bridge] selectedString];
2374 }
2375
2376 - (NSAttributedString *)selectedAttributedString
2377 {
2378     WebBridge *bridge = [self _bridge];
2379     NSAttributedString *attributedString = [self _attributeStringFromDOMRange:[self _selectedRange]];
2380     if (attributedString == nil) {
2381         attributedString = [bridge selectedAttributedString];
2382     }
2383     return attributedString;
2384 }
2385
2386 - (void)selectAll
2387 {
2388     [[self _bridge] selectAll];
2389 }
2390
2391 // Remove the selection.
2392 - (void)deselectAll
2393 {
2394     [[self _bridge] deselectAll];
2395 }
2396
2397 - (void)deselectText
2398 {
2399     [[self _bridge] deselectText];
2400 }
2401
2402 - (BOOL)isOpaque
2403 {
2404     return [[self _webView] drawsBackground];
2405 }
2406
2407 - (void)setNeedsDisplay:(BOOL)flag
2408 {
2409     LOG(View, "%@ flag = %d", self, (int)flag);
2410     [super setNeedsDisplay: flag];
2411 }
2412
2413 - (void)setNeedsLayout: (BOOL)flag
2414 {
2415     LOG(View, "%@ flag = %d", self, (int)flag);
2416     _private->needsLayout = flag;
2417 }
2418
2419
2420 - (void)setNeedsToApplyStyles: (BOOL)flag
2421 {
2422     LOG(View, "%@ flag = %d", self, (int)flag);
2423     _private->needsToApplyStyles = flag;
2424 }
2425
2426 - (void)drawRect:(NSRect)rect
2427 {
2428     LOG(View, "%@ drawing", self);
2429
2430     // Work around AppKit bug <rdar://problem/3875305> rect passed to drawRect: is too large.
2431     // Ignore the passed-in rect and instead union in the rectangles from getRectsBeingDrawn.
2432     // This does a better job of clipping out rects that are entirely outside the visible area.
2433     const NSRect *rects;
2434     int count;
2435     [self getRectsBeingDrawn:&rects count:&count];
2436
2437     // If count == 0 here, use the rect passed in for drawing. This is a workaround for:
2438     // <rdar://problem/3908282> REGRESSION (Mail): No drag image dragging selected text in Blot and Mail
2439     // The reason for the workaround is that this method is called explicitly from the code
2440     // to generate a drag image, and at that time, getRectsBeingDrawn:count: will return a zero count.
2441     if (count > 0) {
2442         rect = NSZeroRect;
2443         int i;
2444         for (i = 0; i < count; ++i) {
2445             rect = NSUnionRect(rect, rects[i]);
2446         }
2447         if (rect.size.height == 0 || rect.size.width == 0) {
2448             return;
2449         }
2450     }
2451
2452     BOOL subviewsWereSetAside = _private->subviewsSetAside;
2453     if (subviewsWereSetAside) {
2454         [self _restoreSubviews];
2455     }
2456
2457 #ifdef _KWQ_TIMING
2458     double start = CFAbsoluteTimeGetCurrent();
2459 #endif
2460
2461     [NSGraphicsContext saveGraphicsState];
2462     NSRectClip(rect);
2463
2464     ASSERT([[self superview] isKindOfClass:[WebClipView class]]);
2465
2466     [(WebClipView *)[self superview] setAdditionalClip:rect];
2467
2468     NS_DURING {
2469         WebTextRendererFactory *textRendererFactoryIfCoalescing = nil;
2470         if ([WebTextRenderer shouldBufferTextDrawing] && [NSView focusView]) {
2471             textRendererFactoryIfCoalescing = [WebTextRendererFactory sharedFactory];
2472             [textRendererFactoryIfCoalescing startCoalesceTextDrawing];
2473         }
2474
2475         if ([self _transparentBackground]) {
2476             [[NSColor clearColor] set];
2477             NSRectFill (rect);
2478         }
2479
2480         //double start = CFAbsoluteTimeGetCurrent();
2481         [[self _bridge] drawRect:rect];
2482         //LOG(Timing, "draw time %e", CFAbsoluteTimeGetCurrent() - start);
2483
2484         if (textRendererFactoryIfCoalescing != nil) {
2485             [textRendererFactoryIfCoalescing endCoalesceTextDrawing];
2486         }
2487
2488         [(WebClipView *)[self superview] resetAdditionalClip];
2489
2490         [NSGraphicsContext restoreGraphicsState];
2491     } NS_HANDLER {
2492         [(WebClipView *)[self superview] resetAdditionalClip];
2493         [NSGraphicsContext restoreGraphicsState];
2494         ERROR("Exception caught while drawing: %@", localException);
2495         [localException raise];
2496     } NS_ENDHANDLER
2497
2498 #ifdef DEBUG_LAYOUT
2499     NSRect vframe = [self frame];
2500     [[NSColor blackColor] set];
2501     NSBezierPath *path;
2502     path = [NSBezierPath bezierPath];
2503     [path setLineWidth:(float)0.1];
2504     [path moveToPoint:NSMakePoint(0, 0)];
2505     [path lineToPoint:NSMakePoint(vframe.size.width, vframe.size.height)];
2506     [path closePath];
2507     [path stroke];
2508     path = [NSBezierPath bezierPath];
2509     [path setLineWidth:(float)0.1];
2510     [path moveToPoint:NSMakePoint(0, vframe.size.height)];
2511     [path lineToPoint:NSMakePoint(vframe.size.width, 0)];
2512     [path closePath];
2513     [path stroke];
2514 #endif
2515
2516 #ifdef _KWQ_TIMING
2517     double thisTime = CFAbsoluteTimeGetCurrent() - start;
2518     LOG(Timing, "%s draw seconds = %f", widget->part()->baseURL().URL().latin1(), thisTime);
2519 #endif
2520
2521     if (subviewsWereSetAside) {
2522         [self _setAsideSubviews];
2523     }
2524 }
2525
2526 // Turn off the additional clip while computing our visibleRect.
2527 - (NSRect)visibleRect
2528 {
2529     if (!([[self superview] isKindOfClass:[WebClipView class]]))
2530         return [super visibleRect];
2531
2532     WebClipView *clipView = (WebClipView *)[self superview];
2533
2534     BOOL hasAdditionalClip = [clipView hasAdditionalClip];
2535     if (!hasAdditionalClip) {
2536         return [super visibleRect];
2537     }
2538
2539     NSRect additionalClip = [clipView additionalClip];
2540     [clipView resetAdditionalClip];
2541     NSRect visibleRect = [super visibleRect];
2542     [clipView setAdditionalClip:additionalClip];
2543     return visibleRect;
2544 }
2545
2546 - (BOOL)isFlipped
2547 {
2548     return YES;
2549 }
2550
2551 - (void)windowDidBecomeKey:(NSNotification *)notification
2552 {
2553     ASSERT([notification object] == [self window]);
2554     [self addMouseMovedObserver];
2555     [self updateFocusState];
2556 }
2557
2558 - (void)windowDidResignKey: (NSNotification *)notification
2559 {
2560     ASSERT([notification object] == [self window]);
2561     [_private->compController endRevertingChange:NO moveLeft:NO];
2562     [self removeMouseMovedObserver];
2563     [self updateFocusState];
2564 }
2565
2566 - (void)windowWillClose:(NSNotification *)notification
2567 {
2568     [_private->compController endRevertingChange:NO moveLeft:NO];
2569     [[self _pluginController] destroyAllPlugins];
2570 }
2571
2572 - (void)scrollWheel:(NSEvent *)event
2573 {
2574     [self retain];
2575
2576     if (![[self _bridge] scrollOverflowWithScrollWheelEvent:event]) {
2577         [[self nextResponder] scrollWheel:event];
2578     }
2579
2580     [self release];
2581 }
2582
2583 - (BOOL)_isSelectionEvent:(NSEvent *)event
2584 {
2585     NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
2586     return [[[self elementAtPoint:point] objectForKey:WebElementIsSelectedKey] boolValue];
2587 }
2588
2589 - (void)_setMouseDownEvent:(NSEvent *)event
2590 {
2591     ASSERT([event type] == NSLeftMouseDown || [event type] == NSRightMouseDown || [event type] == NSOtherMouseDown);
2592
2593     if (event == _private->mouseDownEvent) {
2594         return;
2595     }
2596
2597     [event retain];
2598     [_private->mouseDownEvent release];
2599     _private->mouseDownEvent = event;
2600
2601     [_private->firstResponderAtMouseDownTime release];
2602     _private->firstResponderAtMouseDownTime = [[[self window] firstResponder] retain];
2603 }
2604
2605 - (BOOL)acceptsFirstMouse:(NSEvent *)event
2606 {
2607     NSView *hitView = [self _hitViewForEvent:event];
2608     WebHTMLView *hitHTMLView = [hitView isKindOfClass:[self class]] ? (WebHTMLView *)hitView : nil;
2609     [hitHTMLView _setMouseDownEvent:event];
2610
2611     if ([[self _webView] _dashboardBehavior:WebDashboardBehaviorAlwaysAcceptsFirstMouse])
2612         return YES;
2613
2614     if (hitHTMLView != nil) {
2615         [[hitHTMLView _bridge] setActivationEventNumber:[event eventNumber]];
2616         return [hitHTMLView _isSelectionEvent:event] ? [[hitHTMLView _bridge] eventMayStartDrag:event] : NO;
2617     } else {
2618         return [hitView acceptsFirstMouse:event];
2619     }
2620 }
2621
2622 - (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)event
2623 {
2624     NSView *hitView = [self _hitViewForEvent:event];
2625     WebHTMLView *hitHTMLView = [hitView isKindOfClass:[self class]] ? (WebHTMLView *)hitView : nil;
2626     if (hitHTMLView != nil) {
2627         [hitHTMLView _setMouseDownEvent:event];
2628         return [hitHTMLView _isSelectionEvent:event] ? [[hitHTMLView _bridge] eventMayStartDrag:event] : NO;
2629     } else {
2630         return [hitView shouldDelayWindowOrderingForEvent:event];
2631     }
2632 }
2633
2634 - (void)mouseDown:(NSEvent *)event
2635 {
2636     [self retain];
2637
2638     _private->handlingMouseDownEvent = YES;
2639
2640     // Record the mouse down position so we can determine drag hysteresis.
2641     [self _setMouseDownEvent:event];
2642
2643     // TEXTINPUT: if there is marked text and the current input
2644     // manager wants to handle mouse events, we need to make sure to
2645     // pass it to them. If not, then we need to notify the input
2646     // manager when the marked text is abandoned (user clicks outside
2647     // the marked area)
2648
2649     [_private->compController endRevertingChange:NO moveLeft:NO];
2650
2651     // If the web page handles the context menu event and menuForEvent: returns nil, we'll get control click events here.
2652     // We don't want to pass them along to KHTML a second time.
2653     if (!([event modifierFlags] & NSControlKeyMask)) {
2654         _private->ignoringMouseDraggedEvents = NO;
2655
2656         // Don't do any mouseover while the mouse is down.
2657         [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(_updateMouseoverWithFakeEvent) object:nil];
2658
2659         // Let KHTML get a chance to deal with the event. This will call back to us
2660         // to start the autoscroll timer if appropriate.
2661         [[self _bridge] mouseDown:event];
2662     }
2663
2664     [_private->firstResponderAtMouseDownTime release];
2665     _private->firstResponderAtMouseDownTime = nil;
2666
2667     _private->handlingMouseDownEvent = NO;
2668
2669     [self release];
2670 }
2671
2672 - (void)dragImage:(NSImage *)dragImage
2673                at:(NSPoint)at
2674            offset:(NSSize)offset
2675             event:(NSEvent *)event
2676        pasteboard:(NSPasteboard *)pasteboard
2677            source:(id)source
2678         slideBack:(BOOL)slideBack
2679 {
2680     [self _stopAutoscrollTimer];
2681
2682     _private->initiatedDrag = YES;
2683     [[self _webView] _setInitiatedDrag:YES];
2684
2685     // Retain this view during the drag because it may be released before the drag ends.
2686     [self retain];
2687
2688     [super dragImage:dragImage at:at offset:offset event:event pasteboard:pasteboard source:source slideBack:slideBack];
2689 }
2690
2691 - (void)mouseDragged:(NSEvent *)event
2692 {
2693     [self retain];
2694
2695     // TEXTINPUT: if there is marked text and the current input
2696     // manager wants to handle mouse events, we need to make sure to
2697     // pass it to them.
2698
2699     if (!_private->ignoringMouseDraggedEvents) {
2700         [[self _bridge] mouseDragged:event];
2701     }
2702
2703     [self release];
2704 }
2705
2706 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal
2707 {
2708     if (_private->webCoreDragOp == NSDragOperationNone) {
2709         return (NSDragOperationGeneric | NSDragOperationCopy);
2710     } else {
2711         return _private->webCoreDragOp;
2712     }
2713 }
2714
2715 - (void)draggedImage:(NSImage *)image movedTo:(NSPoint)screenLoc
2716 {
2717     NSPoint windowImageLoc = [[self window] convertScreenToBase:screenLoc];
2718     NSPoint windowMouseLoc = NSMakePoint(windowImageLoc.x + _private->dragOffset.x, windowImageLoc.y + _private->dragOffset.y);
2719     [[self _bridge] dragSourceMovedTo:windowMouseLoc];
2720 }
2721
2722 - (void)draggedImage:(NSImage *)anImage endedAt:(NSPoint)aPoint operation:(NSDragOperation)operation
2723 {
2724     NSPoint windowImageLoc = [[self window] convertScreenToBase:aPoint];
2725     NSPoint windowMouseLoc = NSMakePoint(windowImageLoc.x + _private->dragOffset.x, windowImageLoc.y + _private->dragOffset.y);
2726     [[self _bridge] dragSourceEndedAt:windowMouseLoc operation:operation];
2727
2728     _private->initiatedDrag = NO;
2729     [[self _webView] _setInitiatedDrag:NO];
2730
2731     // Prevent queued mouseDragged events from coming after the drag and fake mouseUp event.
2732     _private->ignoringMouseDraggedEvents = YES;
2733
2734     // Once the dragging machinery kicks in, we no longer get mouse drags or the up event.
2735     // khtml expects to get balanced down/up's, so we must fake up a mouseup.
2736     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSLeftMouseUp
2737                                             location:windowMouseLoc
2738                                        modifierFlags:[[NSApp currentEvent] modifierFlags]
2739                                            timestamp:[NSDate timeIntervalSinceReferenceDate]
2740                                         windowNumber:[[self window] windowNumber]
2741                                              context:[[NSApp currentEvent] context]
2742                                          eventNumber:0 clickCount:0 pressure:0];
2743     [self mouseUp:fakeEvent]; // This will also update the mouseover state.
2744
2745     // Balance the previous retain from when the drag started.
2746     [self release];
2747 }
2748
2749 - (NSArray *)namesOfPromisedFilesDroppedAtDestination:(NSURL *)dropDestination
2750 {
2751     ASSERT(_private->draggingImageURL);
2752
2753     NSFileWrapper *wrapper = [[self _dataSource] _fileWrapperForURL:_private->draggingImageURL];
2754     ASSERT(wrapper);
2755
2756     // FIXME: Report an error if we fail to create a file.
2757     NSString *path = [[dropDestination path] stringByAppendingPathComponent:[wrapper preferredFilename]];
2758     path = [[NSFileManager defaultManager] _web_pathWithUniqueFilenameForPath:path];
2759     if (![wrapper writeToFile:path atomically:NO updateFilenames:YES]) {
2760         ERROR("Failed to create image file via -[NSFileWrapper writeToFile:atomically:updateFilenames:]");
2761     }
2762
2763     return [NSArray arrayWithObject:[path lastPathComponent]];
2764 }
2765
2766 - (BOOL)_canProcessDragWithDraggingInfo:(id <NSDraggingInfo>)draggingInfo
2767 {
2768     NSPasteboard *pasteboard = [draggingInfo draggingPasteboard];
2769     NSMutableSet *types = [NSMutableSet setWithArray:[pasteboard types]];
2770     [types intersectSet:[NSSet setWithArray:[WebHTMLView _insertablePasteboardTypes]]];
2771     if ([types count] == 0) {
2772         return NO;
2773     } else if ([types count] == 1 &&
2774                [types containsObject:NSFilenamesPboardType] &&
2775                ![self _imageExistsAtPaths:[pasteboard propertyListForType:NSFilenamesPboardType]]) {
2776         return NO;
2777     }
2778
2779     NSPoint point = [self convertPoint:[draggingInfo draggingLocation] fromView:nil];
2780     NSDictionary *element = [self elementAtPoint:point];
2781     if ([[self _webView] isEditable] || [[element objectForKey:WebElementDOMNodeKey] isContentEditable]) {
2782         if (_private->initiatedDrag && [[element objectForKey:WebElementIsSelectedKey] boolValue]) {
2783             // Can't drag onto the selection being dragged.
2784             return NO;
2785         }
2786         return YES;
2787     }
2788
2789     return NO;
2790 }
2791
2792 - (BOOL)_isMoveDrag
2793 {
2794     return _private->initiatedDrag &&
2795     ([self _isEditable] && [self _hasSelection]) &&
2796     ([[NSApp currentEvent] modifierFlags] & NSAlternateKeyMask) == 0;
2797 }
2798
2799 - (BOOL)_isNSColorDrag:(id <NSDraggingInfo>)draggingInfo
2800 {
2801     return ([[[draggingInfo draggingPasteboard] types] containsObject:NSColorPboardType]);
2802 }
2803
2804 - (NSDragOperation)draggingUpdatedWithDraggingInfo:(id <NSDraggingInfo>)draggingInfo actionMask:(unsigned int)actionMask
2805 {
2806     NSDragOperation operation = NSDragOperationNone;
2807
2808     if (actionMask & WebDragDestinationActionDHTML) {
2809         operation = [[self _bridge] dragOperationForDraggingInfo:draggingInfo];
2810     }
2811     _private->webCoreHandlingDrag = (operation != NSDragOperationNone);
2812
2813     if ((actionMask & WebDragDestinationActionEdit) &&
2814         !_private->webCoreHandlingDrag
2815         && [self _canProcessDragWithDraggingInfo:draggingInfo]) {
2816         if ([self _isNSColorDrag:draggingInfo]) {
2817             operation = NSDragOperationGeneric;
2818         }
2819         else {
2820             WebView *webView = [self _webView];
2821             [webView moveDragCaretToPoint:[webView convertPoint:[draggingInfo draggingLocation] fromView:nil]];
2822             operation = [self _isMoveDrag] ? NSDragOperationMove : NSDragOperationCopy;
2823         }
2824     } else {
2825         [[self _webView] removeDragCaret];
2826     }
2827
2828     return operation;
2829 }
2830
2831 - (void)draggingCancelledWithDraggingInfo:(id <NSDraggingInfo>)draggingInfo
2832 {
2833     [[self _bridge] dragExitedWithDraggingInfo:draggingInfo];
2834     [[self _webView] removeDragCaret];
2835 }
2836
2837 - (BOOL)concludeDragForDraggingInfo:(id <NSDraggingInfo>)draggingInfo actionMask:(unsigned int)actionMask
2838 {
2839     WebView *webView = [self _webView];
2840     WebBridge *bridge = [self _bridge];
2841     if (_private->webCoreHandlingDrag) {
2842         ASSERT(actionMask & WebDragDestinationActionDHTML);
2843         [[webView _UIDelegateForwarder] webView:webView willPerformDragDestinationAction:WebDragDestinationActionDHTML forDraggingInfo:draggingInfo];
2844         [bridge concludeDragForDraggingInfo:draggingInfo];
2845         return YES;
2846     } else if (actionMask & WebDragDestinationActionEdit) {
2847         if ([self _isNSColorDrag:draggingInfo]) {
2848             NSColor *color = [NSColor colorFromPasteboard:[draggingInfo draggingPasteboard]];
2849             if (!color)
2850                 return NO;
2851             DOMCSSStyleDeclaration *style = [self _emptyStyle];
2852             [style setProperty:@"color" :[self _colorAsString:color] :@""];
2853             if ([[webView _editingDelegateForwarder] webView:webView shouldApplyStyle:style toElementsInDOMRange:[bridge selectedDOMRange]]) {
2854                 [[webView _UIDelegateForwarder] webView:webView willPerformDragDestinationAction:WebDragDestinationActionEdit forDraggingInfo:draggingInfo];
2855                 [bridge applyStyle:style withUndoAction:WebUndoActionSetColor];
2856                 return YES;
2857             }
2858             return NO;
2859         }
2860         else {
2861             BOOL didInsert = NO;
2862             if ([self _canProcessDragWithDraggingInfo:draggingInfo]) {
2863                 NSPasteboard *pasteboard = [draggingInfo draggingPasteboard];
2864                 BOOL chosePlainText;
2865                 DOMDocumentFragment *fragment = [self _documentFragmentFromPasteboard:pasteboard allowPlainText:YES chosePlainText:&chosePlainText];
2866                 if (fragment && [self _shouldInsertFragment:fragment replacingDOMRange:[bridge dragCaretDOMRange] givenAction:WebViewInsertActionDropped]) {
2867                     [[webView _UIDelegateForwarder] webView:webView willPerformDragDestinationAction:WebDragDestinationActionEdit forDraggingInfo:draggingInfo];
2868                     if ([self _isMoveDrag]) {
2869                         BOOL smartMove = [[self _bridge] selectionGranularity] == WebSelectByWord && [self _canSmartReplaceWithPasteboard:pasteboard];
2870                         [bridge moveSelectionToDragCaret:fragment smartMove:smartMove];
2871                     } else {
2872                         [bridge setSelectionToDragCaret];
2873                         [bridge replaceSelectionWithFragment:fragment selectReplacement:YES smartReplace:[self _canSmartReplaceWithPasteboard:pasteboard] matchStyle:chosePlainText];
2874                     }
2875                     didInsert = YES;
2876                 }
2877             }
2878             [webView removeDragCaret];
2879             return didInsert;
2880         }
2881     }
2882     return NO;
2883 }
2884
2885 - (NSDictionary *)elementAtPoint:(NSPoint)point
2886 {
2887     NSDictionary *elementInfoWC = [[self _bridge] elementAtPoint:point];
2888     NSMutableDictionary *elementInfo = [elementInfoWC mutableCopy];
2889
2890     // Convert URL strings to NSURLs
2891     [elementInfo _web_setObjectIfNotNil:[NSURL _web_URLWithDataAsString:[elementInfoWC objectForKey:WebElementLinkURLKey]] forKey:WebElementLinkURLKey];
2892     [elementInfo _web_setObjectIfNotNil:[NSURL _web_URLWithDataAsString:[elementInfoWC objectForKey:WebElementImageURLKey]] forKey:WebElementImageURLKey];
2893
2894     WebFrameView *webFrameView = [self _web_parentWebFrameView];
2895     ASSERT(webFrameView);
2896     WebFrame *webFrame = [webFrameView webFrame];
2897
2898     if (webFrame) {
2899         NSString *frameName = [elementInfoWC objectForKey:WebElementLinkTargetFrameKey];
2900         if ([frameName length] == 0) {
2901             [elementInfo setObject:webFrame forKey:WebElementLinkTargetFrameKey];
2902         } else {
2903             WebFrame *wf = [webFrame findFrameNamed:frameName];
2904             if (wf != nil)
2905                 [elementInfo setObject:wf forKey:WebElementLinkTargetFrameKey];
2906             else
2907                 [elementInfo removeObjectForKey:WebElementLinkTargetFrameKey];
2908         }
2909
2910         [elementInfo setObject:webFrame forKey:WebElementFrameKey];
2911     }
2912
2913     return [elementInfo autorelease];
2914 }
2915
2916 - (void)mouseUp:(NSEvent *)event
2917 {
2918     // TEXTINPUT: if there is marked text and the current input
2919     // manager wants to handle mouse events, we need to make sure to
2920     // pass it to them.
2921
2922     [self retain];
2923
2924     [self _stopAutoscrollTimer];
2925     [[self _bridge] mouseUp:event];
2926     [self _updateMouseoverWithFakeEvent];
2927
2928     [self release];
2929 }
2930
2931 - (void)mouseMovedNotification:(NSNotification *)notification
2932 {
2933     [self _updateMouseoverWithEvent:[[notification userInfo] objectForKey:@"NSEvent"]];
2934 }
2935
2936 - (BOOL)supportsTextEncoding
2937 {
2938     return YES;
2939 }
2940
2941 - (NSView *)nextValidKeyView
2942 {
2943     NSView *view = nil;
2944     BOOL lookInsideWebFrameViews = YES;
2945     if ([self isHiddenOrHasHiddenAncestor]) {
2946         lookInsideWebFrameViews = NO;
2947     } else if ([self _frame] == [[self _webView] mainFrame]) {
2948         // Check for case where first responder is last frame in a frameset, and we are
2949         // the top-level documentView.
2950         NSResponder *firstResponder = [[self window] firstResponder];
2951         if ((firstResponder != self) && [firstResponder isKindOfClass:[WebHTMLView class]] && ([(NSView *)firstResponder nextKeyView] == nil)) {
2952             lookInsideWebFrameViews = NO;
2953         }
2954     }
2955
2956     if (lookInsideWebFrameViews) {
2957         view = [[self _bridge] nextKeyViewInsideWebFrameViews];
2958     }
2959
2960     if (view == nil) {
2961         view = [super nextValidKeyView];
2962         // If there's no next view wired up, we must be in the last subframe.
2963         // There's no direct link to the next valid key view; get it from the bridge.
2964         // Note that view == self here when nextKeyView returns nil, due to AppKit oddness.
2965         // We'll check for both nil and self in case the AppKit oddness goes away.
2966         // WebFrameView has this same kind of logic for the previousValidKeyView case.
2967         if (view == nil || view == self) {
2968             ASSERT([self _frame] != [[self _webView] mainFrame]);
2969             ASSERT(lookInsideWebFrameViews);
2970             view = [[self _bridge] nextValidKeyViewOutsideWebFrameViews];
2971         }
2972     }
2973
2974     return view;
2975 }
2976
2977 - (NSView *)previousValidKeyView
2978 {
2979     NSView *view = nil;
2980     if (![self isHiddenOrHasHiddenAncestor]) {
2981         view = [[self _bridge] previousKeyViewInsideWebFrameViews];
2982     }
2983     if (view == nil) {
2984         view = [super previousValidKeyView];
2985     }
2986     return view;
2987 }
2988
2989 - (BOOL)becomeFirstResponder
2990 {
2991     NSView *view = nil;
2992     if (![[self _webView] _isPerformingProgrammaticFocus]) {
2993         switch ([[self window] keyViewSelectionDirection]) {
2994         case NSDirectSelection:
2995             break;
2996         case NSSelectingNext:
2997             view = [[self _bridge] nextKeyViewInsideWebFrameViews];
2998             break;
2999         case NSSelectingPrevious:
3000             view = [[self _bridge] previousKeyViewInsideWebFrameViews];
3001             break;
3002         }
3003     }
3004     if (view) {
3005         [[self window] makeFirstResponder:view];
3006     }
3007     [self updateFocusState];
3008     [self _updateFontPanel];
3009     _private->startNewKillRingSequence = YES;
3010     return YES;
3011 }
3012
3013 // This approach could be relaxed when dealing with 3228554.
3014 // Some alteration to the selection behavior was done to deal with 3672088.
3015 - (BOOL)resignFirstResponder
3016 {
3017     BOOL resign = [super resignFirstResponder];
3018     if (resign) {
3019         [_private->compController endRevertingChange:NO moveLeft:NO];
3020         _private->resigningFirstResponder = YES;
3021         if (![self maintainsInactiveSelection]) {
3022             if ([[self _webView] _isPerformingProgrammaticFocus]) {
3023                 [self deselectText];
3024             }
3025             else {
3026                 [self deselectAll];
3027             }
3028         }
3029         [self updateFocusState];
3030         _private->resigningFirstResponder = NO;
3031     }
3032     return resign;
3033 }
3034
3035 //------------------------------------------------------------------------------------
3036 // WebDocumentView protocol
3037 //------------------------------------------------------------------------------------
3038 - (void)setDataSource:(WebDataSource *)dataSource
3039 {
3040 }
3041
3042 - (void)dataSourceUpdated:(WebDataSource *)dataSource
3043 {
3044 }
3045
3046 // Does setNeedsDisplay:NO as a side effect when printing is ending.
3047 // pageWidth != 0 implies we will relayout to a new width
3048 - (void)_setPrinting:(BOOL)printing minimumPageWidth:(float)minPageWidth maximumPageWidth:(float)maxPageWidth adjustViewSize:(BOOL)adjustViewSize
3049 {
3050     WebFrame *frame = [self _frame];
3051     NSArray *subframes = [frame childFrames];
3052     unsigned n = [subframes count];
3053     unsigned i;
3054     for (i = 0; i != n; ++i) {
3055         WebFrame *subframe = [subframes objectAtIndex:i];
3056         WebFrameView *frameView = [subframe frameView];
3057         if ([[subframe dataSource] _isDocumentHTML]) {
3058             [(WebHTMLView *)[frameView documentView] _setPrinting:printing minimumPageWidth:0.0 maximumPageWidth:0.0 adjustViewSize:adjustViewSize];
3059         }
3060     }
3061
3062     if (printing != _private->printing) {
3063         [_private->pageRects release];
3064         _private->pageRects = nil;
3065         _private->printing = printing;
3066         [self setNeedsToApplyStyles:YES];
3067         [self setNeedsLayout:YES];
3068         [self layoutToMinimumPageWidth:minPageWidth maximumPageWidth:maxPageWidth adjustingViewSize:adjustViewSize];
3069         if (!printing) {
3070             // Can't do this when starting printing or nested printing won't work, see 3491427.
3071             [self setNeedsDisplay:NO];
3072         }
3073     }
3074 }
3075
3076 - (BOOL)canPrintHeadersAndFooters
3077 {
3078     return YES;
3079 }
3080
3081 // This is needed for the case where the webview is embedded in the view that's being printed.
3082 // It shouldn't be called when the webview is being printed directly.
3083 - (void)adjustPageHeightNew:(float *)newBottom top:(float)oldTop bottom:(float)oldBottom limit:(float)bottomLimit
3084 {
3085     // This helps when we print as part of a larger print process.
3086     // If the WebHTMLView itself is what we're printing, then we will never have to do this.
3087     BOOL wasInPrintingMode = _private->printing;
3088     if (!wasInPrintingMode) {
3089         [self _setPrinting:YES minimumPageWidth:0.0 maximumPageWidth:0.0 adjustViewSize:NO];
3090     }
3091
3092     [[self _bridge] adjustPageHeightNew:newBottom top:oldTop bottom:oldBottom limit:bottomLimit];
3093
3094     if (!wasInPrintingMode) {
3095         [self _setPrinting:NO minimumPageWidth:0.0 maximumPageWidth:0.0 adjustViewSize:NO];
3096     }
3097 }
3098
3099 - (float)_availablePaperWidthForPrintOperation:(NSPrintOperation *)printOperation
3100 {
3101     NSPrintInfo *printInfo = [printOperation printInfo];
3102     return [printInfo paperSize].width - [printInfo leftMargin] - [printInfo rightMargin];
3103 }
3104
3105 - (float)_scaleFactorForPrintOperation:(NSPrintOperation *)printOperation
3106 {
3107     float viewWidth = NSWidth([self bounds]);
3108     if (viewWidth < 1) {
3109         ERROR("%@ has no width when printing", self);
3110         return 1.0;
3111     }
3112
3113     float userScaleFactor = [printOperation _web_pageSetupScaleFactor];
3114     float maxShrinkToFitScaleFactor = 1/PrintingMaximumShrinkFactor;
3115     float shrinkToFitScaleFactor = [self _availablePaperWidthForPrintOperation:printOperation]/viewWidth;
3116     return userScaleFactor * MAX(maxShrinkToFitScaleFactor, shrinkToFitScaleFactor);
3117 }
3118
3119 // FIXME 3491344: This is a secret AppKit-internal method that we need to override in order
3120 // to get our shrink-to-fit to work with a custom pagination scheme. We can do this better
3121 // if AppKit makes it SPI/API.
3122 - (float)_provideTotalScaleFactorForPrintOperation:(NSPrintOperation *)printOperation
3123 {
3124     return [self _scaleFactorForPrintOperation:printOperation];
3125 }
3126
3127 // This is used for Carbon printing. At some point we might want to make this public API.
3128 - (void)setPageWidthForPrinting:(float)pageWidth
3129 {
3130     [self _setPrinting:NO minimumPageWidth:0. maximumPageWidth:0. adjustViewSize:NO];
3131     [self _setPrinting:YES minimumPageWidth:pageWidth maximumPageWidth:pageWidth adjustViewSize:YES];
3132 }
3133
3134
3135 // Return the number of pages available for printing
3136 - (BOOL)knowsPageRange:(NSRangePointer)range {
3137     // Must do this explicit display here, because otherwise the view might redisplay while the print
3138     // sheet was up, using printer fonts (and looking different).
3139     [self displayIfNeeded];
3140     [[self window] setAutodisplay:NO];
3141
3142     // If we are a frameset just print with the layout we have onscreen, otherwise relayout
3143     // according to the paper size
3144     float minLayoutWidth = 0.0;
3145     float maxLayoutWidth = 0.0;
3146     if (![[self _bridge] isFrameSet]) {
3147         float paperWidth = [self _availablePaperWidthForPrintOperation:[NSPrintOperation currentOperation]];
3148         minLayoutWidth = paperWidth*PrintingMinimumShrinkFactor;
3149         maxLayoutWidth = paperWidth*PrintingMaximumShrinkFactor;
3150     }
3151     [self _setPrinting:YES minimumPageWidth:minLayoutWidth maximumPageWidth:maxLayoutWidth adjustViewSize:YES]; // will relayout
3152     [[self _webView] _adjustPrintingMarginsForHeaderAndFooter];
3153
3154     // There is a theoretical chance that someone could do some drawing between here and endDocument,
3155     // if something caused setNeedsDisplay after this point. If so, it's not a big tragedy, because
3156     // you'd simply see the printer fonts on screen. As of this writing, this does not happen with Safari.
3157
3158     range->location = 1;
3159     NSPrintOperation *printOperation = [NSPrintOperation currentOperation];
3160     float totalScaleFactor = [self _scaleFactorForPrintOperation:printOperation];
3161     float userScaleFactor = [printOperation _web_pageSetupScaleFactor];
3162     [_private->pageRects release];
3163     NSArray *newPageRects = [[self _bridge] computePageRectsWithPrintWidthScaleFactor:userScaleFactor
3164                                                                           printHeight:floorf([self _calculatePrintHeight]/totalScaleFactor)];
3165     // AppKit gets all messed up if you give it a zero-length page count (see 3576334), so if we
3166     // hit that case we'll pass along a degenerate 1 pixel square to print. This will print
3167     // a blank page (with correct-looking header and footer if that option is on), which matches
3168     // the behavior of IE and Camino at least.
3169     if ([newPageRects count] == 0) {
3170         newPageRects = [NSArray arrayWithObject:[NSValue valueWithRect: NSMakeRect(0, 0, 1, 1)]];
3171     }
3172     _private->pageRects = [newPageRects retain];
3173
3174     range->length = [_private->pageRects count];
3175
3176     return YES;
3177 }
3178
3179 // Return the drawing rectangle for a particular page number
3180 - (NSRect)rectForPage:(int)page {
3181     return [[_private->pageRects objectAtIndex: (page-1)] rectValue];
3182 }
3183
3184 - (void)drawPageBorderWithSize:(NSSize)borderSize
3185 {
3186     ASSERT(NSEqualSizes(borderSize, [[[NSPrintOperation currentOperation] printInfo] paperSize]));
3187     [[self _webView] _drawHeaderAndFooter];
3188 }
3189
3190 - (void)beginDocument
3191 {
3192     NS_DURING
3193         [super beginDocument];
3194     NS_HANDLER
3195         // Exception during [super beginDocument] means that endDocument will not get called,
3196         // so we need to clean up our "print mode" here.
3197         [self _setPrinting:NO minimumPageWidth:0.0 maximumPageWidth:0.0 adjustViewSize:YES];
3198         [[self window] setAutodisplay:YES];
3199     NS_ENDHANDLER
3200 }
3201
3202 - (void)endDocument
3203 {
3204     [super endDocument];
3205     // Note sadly at this point [NSGraphicsContext currentContextDrawingToScreen] is still NO
3206     [self _setPrinting:NO minimumPageWidth:0.0 maximumPageWidth:0.0 adjustViewSize:YES];
3207     [[self window] setAutodisplay:YES];
3208 }
3209
3210 - (BOOL)_interceptEditingKeyEvent:(NSEvent *)event
3211 {
3212     // Work around this bug:
3213     // <rdar://problem/3630640>: "Calling interpretKeyEvents: in a custom text view can fail to process keys right after app startup"
3214     [NSKeyBindingManager sharedKeyBindingManager];
3215
3216     // Use the isEditable state to determine whether or not to process tab key events.
3217     // The idea here is that isEditable will be NO when this WebView is being used
3218     // in a browser, and we desire the behavior where tab moves to the next element
3219     // in tab order. If isEditable is YES, it is likely that the WebView is being
3220     // embedded as the whole view, as in Mail, and tabs should input tabs as expected
3221     // in a text editor.
3222     if (![[self _webView] isEditable] && [event _web_isTabKeyEvent])
3223         return NO;
3224
3225     // Now process the key normally
3226     [self interpretKeyEvents:[NSArray arrayWithObject:event]];
3227     return YES;
3228 }
3229
3230 - (void)keyDown:(NSEvent *)event
3231 {
3232     [self retain];
3233
3234     BOOL callSuper = NO;
3235
3236     _private->keyDownEvent = event;
3237
3238     WebBridge *bridge = [self _bridge];
3239     if ([bridge interceptKeyEvent:event toView:self]) {
3240         // WebCore processed a key event, bail on any outstanding complete: UI
3241         [_private->compController endRevertingChange:YES moveLeft:NO];
3242     } else if (_private->compController && [_private->compController filterKeyDown:event]) {
3243         // Consumed by complete: popup window
3244     } else {
3245         // We're going to process a key event, bail on any outstanding complete: UI
3246         [_private->compController endRevertingChange:YES moveLeft:NO];
3247         if ([self _canEdit] && [self _interceptEditingKeyEvent:event]) {
3248             // Consumed by key bindings manager.
3249         } else {
3250             callSuper = YES;
3251         }
3252     }
3253     if (callSuper) {
3254         [super keyDown:event];
3255     } else {
3256         [NSCursor setHiddenUntilMouseMoves:YES];
3257     }
3258
3259     _private->keyDownEvent = nil;
3260
3261     [self release];
3262 }
3263
3264 - (void)keyUp:(NSEvent *)event
3265 {
3266     [self retain];
3267
3268     if (![[self _bridge] interceptKeyEvent:event toView:self]) {
3269         [super keyUp:event];
3270     }
3271
3272     [self release];
3273 }
3274
3275 - (id)accessibilityAttributeValue:(NSString*)attributeName
3276 {
3277     if ([attributeName isEqualToString: NSAccessibilityChildrenAttribute]) {
3278         id accTree = [[self _bridge] accessibilityTree];
3279         if (accTree)
3280             return [NSArray arrayWithObject: accTree];
3281         return nil;
3282     }
3283     return [super accessibilityAttributeValue:attributeName];
3284 }
3285
3286 - (id)accessibilityFocusedUIElement
3287 {
3288     id accTree = [[self _bridge] accessibilityTree];
3289     if (accTree)
3290         return [accTree accessibilityFocusedUIElement];
3291     else
3292         return self;
3293 }
3294
3295 - (id)accessibilityHitTest:(NSPoint)point
3296 {
3297     id accTree = [[self _bridge] accessibilityTree];
3298     if (accTree) {
3299         NSPoint windowCoord = [[self window] convertScreenToBase: point];
3300         return [accTree accessibilityHitTest: [self convertPoint:windowCoord fromView:nil]];
3301     }
3302     else
3303         return self;
3304 }
3305
3306 - (id)_accessibilityParentForSubview:(NSView *)subview
3307 {
3308     id accTree = [[self _bridge] accessibilityTree];
3309     if (!accTree)
3310         return self;
3311
3312     id parent = [accTree _accessibilityParentForSubview:subview];
3313     if (parent == nil)
3314         return self;
3315
3316     return parent;
3317 }
3318
3319 - (void)centerSelectionInVisibleArea:(id)sender
3320 {
3321     [[self _bridge] centerSelectionInVisibleArea];
3322 }
3323
3324 - (void)_alterCurrentSelection:(WebSelectionAlteration)alteration direction:(WebSelectionDirection)direction granularity:(WebSelectionGranularity)granularity
3325 {
3326     WebBridge *bridge = [self _bridge];
3327     DOMRange *proposedRange = [bridge rangeByAlteringCurrentSelection:alteration direction:direction granularity:granularity];
3328     WebView *webView = [self _webView];
3329     if ([[webView _editingDelegateForwarder] webView:webView shouldChangeSelectedDOMRange:[self _selectedRange] toDOMRange:proposedRange affinity:[bridge selectionAffinity] stillSelecting:NO]) {
3330         [bridge alterCurrentSelection:alteration direction:direction granularity:granularity];
3331     }
3332 }
3333
3334 - (void)_alterCurrentSelection:(WebSelectionAlteration)alteration verticalDistance:(float)verticalDistance
3335 {
3336     WebBridge *bridge = [self _bridge];
3337     DOMRange *proposedRange = [bridge rangeByAlteringCurrentSelection:alteration verticalDistance:verticalDistance];
3338     WebView *webView = [self _webView];
3339     if ([[webView _editingDelegateForwarder] webView:webView shouldChangeSelectedDOMRange:[self _selectedRange] toDOMRange:proposedRange affinity:[bridge selectionAffinity] stillSelecting:NO]) {
3340         [bridge alterCurrentSelection:alteration verticalDistance:verticalDistance];
3341     }
3342 }
3343
3344 - (void)moveBackward:(id)sender
3345 {
3346     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectBackward granularity:WebSelectByCharacter];
3347 }
3348
3349 - (void)moveBackwardAndModifySelection:(id)sender
3350 {
3351     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectBackward granularity:WebSelectByCharacter];
3352 }
3353
3354 - (void)moveDown:(id)sender
3355 {
3356     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectForward granularity:WebSelectByLine];
3357 }
3358
3359 - (void)moveDownAndModifySelection:(id)sender
3360 {
3361     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectForward granularity:WebSelectByLine];
3362 }
3363
3364 - (void)moveForward:(id)sender
3365 {
3366     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectForward granularity:WebSelectByCharacter];
3367 }
3368
3369 - (void)moveForwardAndModifySelection:(id)sender
3370 {
3371     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectForward granularity:WebSelectByCharacter];
3372 }
3373
3374 - (void)moveLeft:(id)sender
3375 {
3376     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectLeft granularity:WebSelectByCharacter];
3377 }
3378
3379 - (void)moveLeftAndModifySelection:(id)sender
3380 {
3381     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectLeft granularity:WebSelectByCharacter];
3382 }
3383
3384 - (void)moveRight:(id)sender
3385 {
3386     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectRight granularity:WebSelectByCharacter];
3387 }
3388
3389 - (void)moveRightAndModifySelection:(id)sender
3390 {
3391     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectRight granularity:WebSelectByCharacter];
3392 }
3393
3394 - (void)moveToBeginningOfDocument:(id)sender
3395 {
3396     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectBackward granularity:WebSelectToDocumentBoundary];
3397 }
3398
3399 - (void)moveToBeginningOfDocumentAndModifySelection:(id)sender
3400 {
3401     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectBackward granularity:WebSelectToDocumentBoundary];
3402 }
3403
3404 - (void)moveToBeginningOfLine:(id)sender
3405 {
3406     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectBackward granularity:WebSelectToLineBoundary];
3407 }
3408
3409 - (void)moveToBeginningOfLineAndModifySelection:(id)sender
3410 {
3411     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectBackward granularity:WebSelectToLineBoundary];
3412 }
3413
3414 - (void)moveToBeginningOfParagraph:(id)sender
3415 {
3416     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectBackward granularity:WebSelectToParagraphBoundary];
3417 }
3418
3419 - (void)moveToBeginningOfParagraphAndModifySelection:(id)sender
3420 {
3421     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectBackward granularity:WebSelectToParagraphBoundary];
3422 }
3423
3424 - (void)moveToEndOfDocument:(id)sender
3425 {
3426     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectForward granularity:WebSelectToDocumentBoundary];
3427 }
3428
3429 - (void)moveToEndOfDocumentAndModifySelection:(id)sender
3430 {
3431     [self _alterCurrentSelection:WebSelectByExtending direction:WebSelectForward granularity:WebSelectToDocumentBoundary];
3432 }
3433
3434 - (void)moveToEndOfLine:(id)sender
3435 {
3436     [self _alterCurrentSelection:WebSelectByMoving direction:WebSelectForward granularity:WebSelectToLineBoundary];
3437 }
3438