WebKit/WebView/WebHTMLView.m

   1 /*
   2  * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #import <WebKit/WebHTMLView.h>
  30
  31 #import <ApplicationServices/ApplicationServices.h>
  32 #import <WebKit/DOM.h>
  33 #import <WebKit/DOMExtensions.h>
  34 #import <WebKit/DOMPrivate.h>
  35 #import <WebKit/WebArchive.h>
  36 #import <WebKit/WebArchiver.h>
  37 #import <WebKit/WebBaseNetscapePluginViewInternal.h>
  38 #import <WebKit/WebFrameBridge.h>
  39 #import <WebKit/WebClipView.h>
  40 #import <WebCore/WebDataProtocol.h>
  41 #import <WebKit/WebDataSourceInternal.h>
  42 #import <WebKit/WebDefaultUIDelegate.h>
  43 #import <WebKit/WebDocumentInternal.h>
  44 #import <WebKit/WebDOMOperationsPrivate.h>
  45 #import <WebKit/WebEditingDelegate.h>
  46 #import <WebKit/WebElementDictionary.h>
  47 #import <WebKit/WebFramePrivate.h>
  48 #import <WebKit/WebFrameInternal.h>
  49 #import <WebKit/WebFrameViewInternal.h>
  50 #import <WebKit/WebHTMLViewInternal.h>
  51 #import <WebKit/WebHTMLRepresentationPrivate.h>
  52 #import <WebKit/WebKitLogging.h>
  53 #import <WebKit/WebKitNSStringExtras.h>
  54 #import <WebKit/WebLocalizableStrings.h>
  55 #import <WebKit/WebNetscapePluginEmbeddedView.h>
  56 #import <WebKit/WebNSAttributedStringExtras.h>
  57 #import <WebKit/WebNSEventExtras.h>
  58 #import <WebKit/WebNSFileManagerExtras.h>
  59 #import <WebKit/WebNSImageExtras.h>
  60 #import <WebKit/WebNSObjectExtras.h>
  61 #import <WebKit/WebNSPasteboardExtras.h>
  62 #import <WebKit/WebNSPrintOperationExtras.h>
  63 #import <WebKit/WebNSURLExtras.h>
  64 #import <WebKit/WebNSViewExtras.h>
  65 #import <WebKit/WebPluginController.h>
  66 #import <WebKit/WebPreferences.h>
  67 #import <WebKit/WebPreferencesPrivate.h>
  68 #import <WebKit/WebResourcePrivate.h>
  69 #import <WebKit/WebStringTruncator.h>
  70 #import <WebKit/WebUIDelegatePrivate.h>
  71 #import <WebKit/WebViewInternal.h>
  72 #import <WebKitSystemInterface.h>
  73 #import <WebCore/WebCoreTextRenderer.h>
  74
  75 #import <AppKit/NSAccessibility.h>
  76
  77 // Included so usage of _NSSoftLinkingGetFrameworkFuncPtr will compile
  78 #import <mach-o/dyld.h>
  79
  80
  81 // need to declare this because AppKit does not make it available as API or SPI
  82 extern NSString *NSMarkedClauseSegmentAttributeName;
  83 extern NSString *NSTextInputReplacementRangeAttributeName;
  84
  85 // Kill ring calls. Would be better to use NSKillRing.h, but that's not available in SPI.
  86 void _NSInitializeKillRing(void);
  87 void _NSAppendToKillRing(NSString *);
  88 void _NSPrependToKillRing(NSString *);
  89 NSString *_NSYankFromKillRing(void);
  90 NSString *_NSYankPreviousFromKillRing(void);
  91 void _NSNewKillRingSequence(void);
  92 void _NSSetKillRingToYankedState(void);
  93 void _NSResetKillRingOperationFlag(void);
  94
  95 @interface NSView (AppKitSecretsIKnowAbout)
  96 - (void)_recursiveDisplayRectIfNeededIgnoringOpacity:(NSRect)rect isVisibleRect:(BOOL)isVisibleRect rectIsVisibleRectForView:(NSView *)visibleView topView:(BOOL)topView;
  97 - (void)_recursiveDisplayAllDirtyWithLockFocus:(BOOL)needsLockFocus visRect:(NSRect)visRect;
  98 - (NSRect)_dirtyRect;
  99 - (void)_setDrawsOwnDescendants:(BOOL)drawsOwnDescendants;
 100 - (void)_propagateDirtyRectsToOpaqueAncestors;
 101 @end
 102
 103 @interface NSApplication (AppKitSecretsIKnowAbout)
 104 - (void)speakString:(NSString *)string;
 105 @end
 106
 107 @interface NSWindow (AppKitSecretsIKnowAbout)
 108 - (id)_newFirstResponderAfterResigning;
 109 @end
 110
 111 @interface NSAttributedString (AppKitSecretsIKnowAbout)
 112 - (id)_initWithDOMRange:(DOMRange *)domRange;
 113 - (DOMDocumentFragment *)_documentFromRange:(NSRange)range document:(DOMDocument *)document documentAttributes:(NSDictionary *)dict subresources:(NSArray **)subresources;
 114 @end
 115
 116 @interface NSSpellChecker (CurrentlyPrivateForTextView)
 117 - (void)learnWord:(NSString *)word;
 118 @end
 119
 120 // By imaging to a width a little wider than the available pixels,
 121 // thin pages will be scaled down a little, matching the way they
 122 // print in IE and Camino. This lets them use fewer sheets than they
 123 // would otherwise, which is presumably why other browsers do this.
 124 // Wide pages will be scaled down more than this.
 125 #define PrintingMinimumShrinkFactor     1.25f
 126
 127 // This number determines how small we are willing to reduce the page content
 128 // in order to accommodate the widest line. If the page would have to be
 129 // reduced smaller to make the widest line fit, we just clip instead (this
 130 // behavior matches MacIE and Mozilla, at least)
 131 #define PrintingMaximumShrinkFactor     2.0f
 132
 133 // This number determines how short the last printed page of a multi-page print session
 134 // can be before we try to shrink the scale in order to reduce the number of pages, and
 135 // thus eliminate the orphan.
 136 #define LastPrintedPageOrphanRatio      0.1f
 137
 138 // This number determines the amount the scale factor is adjusted to try to eliminate orphans.
 139 // It has no direct mathematical relationship to LastPrintedPageOrphanRatio, due to variable
 140 // numbers of pages, logic to avoid breaking elements, and CSS-supplied hard page breaks.
 141 #define PrintingOrphanShrinkAdjustment  1.1f
 142
 143 #define AUTOSCROLL_INTERVAL             0.1f
 144
 145 #define DRAG_LABEL_BORDER_X             4.0f
 146 #define DRAG_LABEL_BORDER_Y             2.0f
 147 #define DRAG_LABEL_RADIUS               5.0f
 148 #define DRAG_LABEL_BORDER_Y_OFFSET              2.0f
 149
 150 #define MIN_DRAG_LABEL_WIDTH_BEFORE_CLIP        120.0f
 151 #define MAX_DRAG_LABEL_WIDTH                    320.0f
 152
 153 #define DRAG_LINK_LABEL_FONT_SIZE   11.0f
 154 #define DRAG_LINK_URL_FONT_SIZE   10.0f
 155
 156 // Any non-zero value will do, but using something recognizable might help us debug some day.
 157 #define TRACKING_RECT_TAG 0xBADFACE
 158
 159 // FIXME: This constant is copied from AppKit's _NXSmartPaste constant.
 160 #define WebSmartPastePboardType @"NeXT smart paste pasteboard type"
 161
 162 #define STANDARD_WEIGHT 5
 163 #define MIN_BOLD_WEIGHT 9
 164 #define STANDARD_BOLD_WEIGHT 10
 165
 166 typedef enum {
 167     deleteSelectionAction,
 168     deleteKeyAction,
 169     forwardDeleteKeyAction
 170 } WebDeletionAction;
 171
 172 // if YES, do the standard NSView hit test (which can't give the right result when HTML overlaps a view)
 173 static BOOL forceNSViewHitTest = NO;
 174
 175 // if YES, do the "top WebHTMLView" it test (which we'd like to do all the time but can't because of Java requirements [see bug 4349721])
 176 static BOOL forceWebHTMLViewHitTest = NO;
 177
 178 // Used to avoid linking with ApplicationServices framework for _DCMDictionaryServiceWindowShow
 179 void *_NSSoftLinkingGetFrameworkFuncPtr(NSString *inUmbrellaFrameworkName,
 180                                         NSString *inFrameworkName,
 181                                         const char *inFuncName,
 182                                         const struct mach_header **ioCachedFrameworkImageHeaderPtr);
 183
 184
 185 @interface WebHTMLView (WebTextSizing) <_WebDocumentTextSizing>
 186 @end
 187
 188 @interface WebHTMLView (WebHTMLViewFileInternal)
 189 - (BOOL)_imageExistsAtPaths:(NSArray *)paths;
 190 - (DOMDocumentFragment *)_documentFragmentFromPasteboard:(NSPasteboard *)pasteboard inContext:(DOMRange *)context allowPlainText:(BOOL)allowPlainText chosePlainText:(BOOL *)chosePlainText;
 191 - (NSString *)_plainTextFromPasteboard:(NSPasteboard *)pasteboard;
 192 - (void)_pasteWithPasteboard:(NSPasteboard *)pasteboard allowPlainText:(BOOL)allowPlainText;
 193 - (void)_pasteAsPlainTextWithPasteboard:(NSPasteboard *)pasteboard;
 194 - (BOOL)_shouldInsertFragment:(DOMDocumentFragment *)fragment replacingDOMRange:(DOMRange *)range givenAction:(WebViewInsertAction)action;
 195 - (BOOL)_shouldInsertText:(NSString *)text replacingDOMRange:(DOMRange *)range givenAction:(WebViewInsertAction)action;
 196 - (BOOL)_shouldReplaceSelectionWithText:(NSString *)text givenAction:(WebViewInsertAction)action;
 197 - (float)_calculatePrintHeight;
 198 - (void)_updateTextSizeMultiplier;
 199 - (DOMRange *)_selectedRange;
 200 - (BOOL)_shouldDeleteRange:(DOMRange *)range;
 201 - (void)_deleteRange:(DOMRange *)range
 202             killRing:(BOOL)killRing
 203              prepend:(BOOL)prepend
 204        smartDeleteOK:(BOOL)smartDeleteOK
 205       deletionAction:(WebDeletionAction)deletionAction
 206          granularity:(WebBridgeSelectionGranularity)granularity;
 207 - (void)_deleteSelection;
 208 - (BOOL)_canSmartReplaceWithPasteboard:(NSPasteboard *)pasteboard;
 209 - (NSView *)_hitViewForEvent:(NSEvent *)event;
 210 - (void)_writeSelectionWithPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard cachedAttributedString:(NSAttributedString *)attributedString;
 211 - (DOMRange *)_documentRange;
 212 - (WebFrameBridge *)_bridge;
 213 - (void)_setMouseDownEvent:(NSEvent *)event;
 214 @end
 215
 216 @interface WebHTMLView (WebForwardDeclaration) // FIXME: Put this in a normal category and stop doing the forward declaration trick.
 217 - (void)_setPrinting:(BOOL)printing minimumPageWidth:(float)minPageWidth maximumPageWidth:(float)maxPageWidth adjustViewSize:(BOOL)adjustViewSize;
 218 @end
 219
 220 @interface WebHTMLView (WebNSTextInputSupport) <NSTextInput>
 221 - (void)_updateSelectionForInputManager;
 222 - (void)_insertText:(NSString *)text selectInsertedText:(BOOL)selectText;
 223 @end
 224
 225 @interface WebHTMLView (WebEditingStyleSupport)
 226 - (DOMCSSStyleDeclaration *)_emptyStyle;
 227 - (NSString *)_colorAsString:(NSColor *)color;
 228 @end
 229
 230 @interface NSView (WebHTMLViewFileInternal)
 231 - (void)_web_setPrintingModeRecursive;
 232 - (void)_web_clearPrintingModeRecursive;
 233 - (void)_web_layoutIfNeededRecursive;
 234 - (void)_web_layoutIfNeededRecursive:(NSRect)rect testDirtyRect:(bool)testDirtyRect;
 235 @end
 236
 237 @interface NSMutableDictionary (WebHTMLViewFileInternal)
 238 - (void)_web_setObjectIfNotNil:(id)object forKey:(id)key;
 239 @end
 240
 241 // Handles the complete: text command
 242 @interface WebTextCompleteController : NSObject
 243 {
 244 @private
 245     WebHTMLView *_view;
 246     NSWindow *_popupWindow;
 247     NSTableView *_tableView;
 248     NSArray *_completions;
 249     NSString *_originalString;
 250     int prefixLength;
 251 }
 252 - (id)initWithHTMLView:(WebHTMLView *)view;
 253 - (void)doCompletion;
 254 - (void)endRevertingChange:(BOOL)revertChange moveLeft:(BOOL)goLeft;
 255 - (BOOL)filterKeyDown:(NSEvent *)event;
 256 - (void)_reflectSelection;
 257 @end
 258
 259 @implementation WebHTMLViewPrivate
 260
 261 - (void)dealloc
 262 {
 263     ASSERT(autoscrollTimer == nil);
 264     ASSERT(autoscrollTriggerEvent == nil);
 265
 266     [mouseDownEvent release];
 267     [draggingImageURL release];
 268     [pluginController release];
 269     [toolTip release];
 270     [compController release];
 271     [firstResponderTextViewAtMouseDownTime release];
 272     [dataSource release];
 273     [highlighters release];
 274
 275     [super dealloc];
 276 }
 277
 278 @end
 279
 280 @implementation WebHTMLView (WebHTMLViewFileInternal)
 281
 282 - (DOMRange *)_documentRange
 283 {
 284     return [[[self _bridge] DOMDocument] _documentRange];
 285 }
 286
 287 - (BOOL)_imageExistsAtPaths:(NSArray *)paths
 288 {
 289     NSArray *imageMIMETypes = [WebFrameBridge supportedImageResourceMIMETypes];
 290     NSEnumerator *enumerator = [paths objectEnumerator];
 291     NSString *path;
 292
 293     while ((path = [enumerator nextObject]) != nil) {
 294         NSString *MIMEType = WKGetMIMETypeForExtension([path pathExtension]);
 295         if ([imageMIMETypes containsObject:MIMEType]) {
 296             return YES;
 297         }
 298     }
 299
 300     return NO;
 301 }
 302
 303 - (WebDataSource *)_dataSource
 304 {
 305     return _private->dataSource;
 306 }
 307
 308 - (WebFrameBridge *)_bridge
 309 {
 310     return [_private->dataSource _bridge];
 311 }
 312
 313 - (WebView *)_webView
 314 {
 315     return [_private->dataSource _webView];
 316 }
 317
 318 - (WebFrameView *)_frameView
 319 {
 320     return [[_private->dataSource webFrame] frameView];
 321 }
 322
 323 - (DOMDocumentFragment *)_documentFragmentWithPaths:(NSArray *)paths
 324 {
 325     DOMDocumentFragment *fragment;
 326     NSArray *imageMIMETypes = [WebFrameBridge supportedImageResourceMIMETypes];
 327     NSEnumerator *enumerator = [paths objectEnumerator];
 328     WebDataSource *dataSource = [self _dataSource];
 329     NSMutableArray *domNodes = [[NSMutableArray alloc] init];
 330     NSString *path;
 331
 332     while ((path = [enumerator nextObject]) != nil) {
 333         NSString *MIMEType = WKGetMIMETypeForExtension([path pathExtension]);
 334         if ([imageMIMETypes containsObject:MIMEType]) {
 335             WebResource *resource = [[WebResource alloc] initWithData:[NSData dataWithContentsOfFile:path]
 336                                                                   URL:[NSURL fileURLWithPath:path]
 337                                                              MIMEType:MIMEType
 338                                                      textEncodingName:nil
 339                                                             frameName:nil];
 340             if (resource) {
 341                 [domNodes addObject:[dataSource _imageElementWithImageResource:resource]];
 342                 [resource release];
 343             }
 344         } else {
 345             // Non-image file types
 346             NSString *url = [[[NSURL fileURLWithPath:path] _webkit_canonicalize] _web_userVisibleString];
 347             [domNodes addObject:[[[self _bridge] DOMDocument] createTextNode: url]];
 348         }
 349     }
 350
 351     fragment = [[self _bridge] documentFragmentWithNodesAsParagraphs:domNodes];
 352
 353     [domNodes release];
 354
 355     return [fragment firstChild] != nil ? fragment : nil;
 356 }
 357
 358 + (NSArray *)_excludedElementsForAttributedStringConversion
 359 {
 360     static NSArray *elements = nil;
 361     if (elements == nil) {
 362         elements = [[NSArray alloc] initWithObjects:
 363             // Omit style since we want style to be inline so the fragment can be easily inserted.
 364             @"style",
 365             // Omit xml so the result is not XHTML.
 366             @"xml",
 367             // Omit tags that will get stripped when converted to a fragment anyway.
 368             @"doctype", @"html", @"head", @"body",
 369             // Omit deprecated tags.
 370             @"applet", @"basefont", @"center", @"dir", @"font", @"isindex", @"menu", @"s", @"strike", @"u",
 371             // Omit object so no file attachments are part of the fragment.
 372             @"object", nil];
 373     }
 374     return elements;
 375 }
 376
 377 - (DOMDocumentFragment *)_documentFragmentFromPasteboard:(NSPasteboard *)pasteboard
 378                                                inContext:(DOMRange *)context
 379                                           allowPlainText:(BOOL)allowPlainText
 380                                           chosePlainText:(BOOL *)chosePlainText
 381 {
 382     NSArray *types = [pasteboard types];
 383     *chosePlainText = NO;
 384
 385     if ([types containsObject:WebArchivePboardType]) {
 386         WebArchive *archive = [[WebArchive alloc] initWithData:[pasteboard dataForType:WebArchivePboardType]];
 387         if (archive) {
 388             DOMDocumentFragment *fragment = [[self _dataSource] _documentFragmentWithArchive:archive];
 389             [archive release];
 390             if (fragment) {
 391                 return fragment;
 392             }
 393         }
 394     }
 395
 396     if ([types containsObject:NSFilenamesPboardType]) {
 397         DOMDocumentFragment *fragment = [self _documentFragmentWithPaths:[pasteboard propertyListForType:NSFilenamesPboardType]];
 398         if (fragment != nil) {
 399             return fragment;
 400         }
 401     }
 402
 403     NSURL *URL;
 404
 405     if ([types containsObject:NSHTMLPboardType]) {
 406         NSString *HTMLString = [pasteboard stringForType:NSHTMLPboardType];
 407         // This is a hack to make Microsoft's HTML pasteboard data work. See 3778785.
 408         if ([HTMLString hasPrefix:@"Version:"]) {
 409             NSRange range = [HTMLString rangeOfString:@"<html" options:NSCaseInsensitiveSearch];
 410             if (range.location != NSNotFound) {
 411                 HTMLString = [HTMLString substringFromIndex:range.location];
 412             }
 413         }
 414         if ([HTMLString length] != 0) {
 415             return [[self _bridge] documentFragmentWithMarkupString:HTMLString baseURLString:nil];
 416         }
 417     }
 418
 419     NSAttributedString *string = nil;
 420     if ([types containsObject:NSRTFDPboardType]) {
 421         string = [[NSAttributedString alloc] initWithRTFD:[pasteboard dataForType:NSRTFDPboardType] documentAttributes:NULL];
 422     }
 423     if (string == nil && [types containsObject:NSRTFPboardType]) {
 424         string = [[NSAttributedString alloc] initWithRTF:[pasteboard dataForType:NSRTFPboardType] documentAttributes:NULL];
 425     }
 426     if (string != nil) {
 427         NSDictionary *documentAttributes = [[NSDictionary alloc] initWithObjectsAndKeys:
 428             [[self class] _excludedElementsForAttributedStringConversion], NSExcludedElementsDocumentAttribute,
 429             self, @"WebResourceHandler", nil];
 430         NSArray *subresources;
 431         DOMDocumentFragment *fragment = [string _documentFromRange:NSMakeRange(0, [string length])
 432                                                           document:[[self _bridge] DOMDocument]
 433                                                 documentAttributes:documentAttributes
 434                                                       subresources:&subresources];
 435         [documentAttributes release];
 436         [string release];
 437         return fragment;
 438     }
 439
 440     if ([types containsObject:NSTIFFPboardType]) {
 441         WebResource *resource = [[WebResource alloc] initWithData:[pasteboard dataForType:NSTIFFPboardType]
 442                                                               URL:[NSURL _web_uniqueWebDataURLWithRelativeString:@"/image.tiff"]
 443                                                          MIMEType:@"image/tiff"
 444                                                  textEncodingName:nil
 445                                                         frameName:nil];
 446         DOMDocumentFragment *fragment = [[self _dataSource] _documentFragmentWithImageResource:resource];
 447         [resource release];
 448         return fragment;
 449     }
 450
 451     if ([types containsObject:NSPICTPboardType]) {
 452         WebResource *resource = [[WebResource alloc] initWithData:[pasteboard dataForType:NSPICTPboardType]
 453                                                               URL:[NSURL _web_uniqueWebDataURLWithRelativeString:@"/image.pict"]
 454                                                          MIMEType:@"image/pict"
 455                                                  textEncodingName:nil
 456                                                         frameName:nil];
 457         DOMDocumentFragment *fragment = [[self _dataSource] _documentFragmentWithImageResource:resource];
 458         [resource release];
 459         return fragment;
 460     }
 461
 462     if ((URL = [NSURL URLFromPasteboard:pasteboard])) {
 463         DOMDocument* document = [[self _bridge] DOMDocument];
 464         ASSERT(document);
 465         if (document) {
 466             DOMHTMLAnchorElement* anchor = (DOMHTMLAnchorElement*)[document createElement:@"a"];
 467             NSString *URLString = [URL _web_userVisibleString];
 468             NSString *URLTitleString = [pasteboard stringForType:WebURLNamePboardType];
 469             DOMText* text = [document createTextNode:URLTitleString];
 470             [anchor setHref:URLString];
 471             [anchor appendChild:text];
 472             DOMDocumentFragment* fragment = [document createDocumentFragment];
 473             [fragment appendChild:anchor];
 474             if ([URLString length] > 0)
 475                 return fragment;
 476         }
 477     }
 478
 479     if (allowPlainText && [types containsObject:NSStringPboardType]) {
 480         *chosePlainText = YES;
 481         return [[self _bridge] documentFragmentWithText:[pasteboard stringForType:NSStringPboardType]
 482                                               inContext:context];
 483     }
 484
 485     return nil;
 486 }
 487
 488 - (NSString *)_plainTextFromPasteboard:(NSPasteboard *)pasteboard
 489 {
 490     NSArray *types = [pasteboard types];
 491
 492     if ([types containsObject:NSStringPboardType])
 493         return [pasteboard stringForType:NSStringPboardType];
 494
 495     NSAttributedString *attributedString = nil;
 496     NSString *string;
 497
 498     if ([types containsObject:NSRTFDPboardType])
 499         attributedString = [[NSAttributedString alloc] initWithRTFD:[pasteboard dataForType:NSRTFDPboardType] documentAttributes:NULL];
 500     if (attributedString == nil && [types containsObject:NSRTFPboardType])
 501         attributedString = [[NSAttributedString alloc] initWithRTF:[pasteboard dataForType:NSRTFPboardType] documentAttributes:NULL];
 502     if (attributedString != nil) {
 503         string = [[attributedString string] copy];
 504         [attributedString release];
 505         return [string autorelease];
 506     }
 507
 508     if ([types containsObject:NSFilenamesPboardType]) {
 509         string = [[pasteboard propertyListForType:NSFilenamesPboardType] componentsJoinedByString:@"\n"];
 510         if (string != nil)
 511             return string;
 512     }
 513
 514     NSURL *URL;
 515
 516     if ((URL = [NSURL URLFromPasteboard:pasteboard])) {
 517         string = [URL _web_userVisibleString];
 518         if ([string length] > 0)
 519             return string;
 520     }
 521
 522     return nil;
 523 }
 524
 525 - (void)_pasteWithPasteboard:(NSPasteboard *)pasteboard allowPlainText:(BOOL)allowPlainText
 526 {
 527     DOMRange *range = [self _selectedRange];
 528     BOOL chosePlainText;
 529     DOMDocumentFragment *fragment = [self _documentFragmentFromPasteboard:pasteboard
 530         inContext:range allowPlainText:allowPlainText chosePlainText:&chosePlainText];
 531     WebFrameBridge *bridge = [self _bridge];
 532     if (fragment && [self _shouldInsertFragment:fragment replacingDOMRange:[self _selectedRange] givenAction:WebViewInsertActionPasted]) {
 533         [bridge replaceSelectionWithFragment:fragment selectReplacement:NO smartReplace:[self _canSmartReplaceWithPasteboard:pasteboard] matchStyle:chosePlainText];
 534     }
 535 }
 536
 537 - (void)_pasteAsPlainTextWithPasteboard:(NSPasteboard *)pasteboard
 538 {
 539     NSString *text = [self _plainTextFromPasteboard:pasteboard];
 540     if ([self _shouldReplaceSelectionWithText:text givenAction:WebViewInsertActionPasted])
 541         [[self _bridge] replaceSelectionWithText:text selectReplacement:NO smartReplace:[self _canSmartReplaceWithPasteboard:pasteboard]];
 542 }
 543
 544 - (BOOL)_shouldInsertFragment:(DOMDocumentFragment *)fragment replacingDOMRange:(DOMRange *)range givenAction:(WebViewInsertAction)action
 545 {
 546     WebView *webView = [self _webView];
 547     DOMNode *child = [fragment firstChild];
 548     if ([fragment lastChild] == child && [child isKindOfClass:[DOMCharacterData class]])
 549         return [[webView _editingDelegateForwarder] webView:webView shouldInsertText:[(DOMCharacterData *)child data] replacingDOMRange:range givenAction:action];
 550     return [[webView _editingDelegateForwarder] webView:webView shouldInsertNode:fragment replacingDOMRange:range givenAction:action];
 551 }
 552
 553 - (BOOL)_shouldInsertText:(NSString *)text replacingDOMRange:(DOMRange *)range givenAction:(WebViewInsertAction)action
 554 {
 555     WebView *webView = [self _webView];
 556     return [[webView _editingDelegateForwarder] webView:webView shouldInsertText:text replacingDOMRange:range givenAction:action];
 557 }
 558
 559 - (BOOL)_shouldReplaceSelectionWithText:(NSString *)text givenAction:(WebViewInsertAction)action
 560 {
 561     return [self _shouldInsertText:text replacingDOMRange:[self _selectedRange] givenAction:action];
 562 }
 563
 564 // Calculate the vertical size of the view that fits on a single page
 565 - (float)_calculatePrintHeight
 566 {
 567     // Obtain the print info object for the current operation
 568     NSPrintInfo *pi = [[NSPrintOperation currentOperation] printInfo];
 569
 570     // Calculate the page height in points
 571     NSSize paperSize = [pi paperSize];
 572     return paperSize.height - [pi topMargin] - [pi bottomMargin];
 573 }
 574
 575 - (void)_updateTextSizeMultiplier
 576 {
 577     [[self _bridge] setTextSizeMultiplier:[[self _webView] textSizeMultiplier]];
 578 }
 579
 580 - (DOMRange *)_selectedRange
 581 {
 582     return [[self _bridge] selectedDOMRange];
 583 }
 584
 585 - (BOOL)_shouldDeleteRange:(DOMRange *)range
 586 {
 587     if (range == nil || [range collapsed])
 588         return NO;
 589
 590     if (![[self _bridge] canDeleteRange:range])
 591         return NO;
 592
 593     WebView *webView = [self _webView];
 594     return [[webView _editingDelegateForwarder] webView:webView shouldDeleteDOMRange:range];
 595 }
 596
 597 - (void)_deleteRange:(DOMRange *)range
 598             killRing:(BOOL)killRing
 599              prepend:(BOOL)prepend
 600        smartDeleteOK:(BOOL)smartDeleteOK
 601       deletionAction:(WebDeletionAction)deletionAction
 602          granularity:(WebBridgeSelectionGranularity)granularity
 603 {
 604     WebFrameBridge *bridge = [self _bridge];
 605     BOOL smartDelete = smartDeleteOK ? [self _canSmartCopyOrDelete] : NO;
 606
 607     BOOL startNewKillRingSequence = _private->startNewKillRingSequence;
 608
 609     if (killRing) {
 610         if (startNewKillRingSequence) {
 611             _NSNewKillRingSequence();
 612         }
 613         NSString *string = [bridge stringForRange:range];
 614         if (prepend) {
 615             _NSPrependToKillRing(string);
 616         } else {
 617             _NSAppendToKillRing(string);
 618         }
 619         startNewKillRingSequence = NO;
 620     }
 621
 622     switch (deletionAction) {
 623         case deleteSelectionAction:
 624             [bridge setSelectedDOMRange:range affinity:NSSelectionAffinityDownstream closeTyping:YES];
 625             [bridge deleteSelectionWithSmartDelete:smartDelete];
 626             break;
 627         case deleteKeyAction:
 628             [bridge setSelectedDOMRange:range affinity:NSSelectionAffinityDownstream closeTyping:(granularity != WebBridgeSelectByCharacter)];
 629             [bridge deleteKeyPressedWithSmartDelete:smartDelete granularity:granularity];
 630             break;
 631         case forwardDeleteKeyAction:
 632             [bridge setSelectedDOMRange:range affinity:NSSelectionAffinityDownstream closeTyping:(granularity != WebBridgeSelectByCharacter)];
 633             [bridge forwardDeleteKeyPressedWithSmartDelete:smartDelete granularity:granularity];
 634             break;
 635     }
 636
 637     _private->startNewKillRingSequence = startNewKillRingSequence;
 638 }
 639
 640 - (void)_deleteSelection
 641 {
 642     [self _deleteRange:[self _selectedRange]
 643               killRing:YES
 644                prepend:NO
 645          smartDeleteOK:YES
 646         deletionAction:deleteSelectionAction
 647            granularity:WebBridgeSelectByCharacter];
 648 }
 649
 650 - (BOOL)_canSmartReplaceWithPasteboard:(NSPasteboard *)pasteboard
 651 {
 652     return [[self _webView] smartInsertDeleteEnabled] && [[pasteboard types] containsObject:WebSmartPastePboardType];
 653 }
 654
 655 - (NSView *)_hitViewForEvent:(NSEvent *)event
 656 {
 657     // Usually, we hack AK's hitTest method to catch all events at the topmost WebHTMLView.
 658     // Callers of this method, however, want to query the deepest view instead.
 659     forceNSViewHitTest = YES;
 660     NSView *hitView = [[[self window] contentView] hitTest:[event locationInWindow]];
 661     forceNSViewHitTest = NO;
 662     return hitView;
 663 }
 664
 665 - (void)_writeSelectionWithPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard cachedAttributedString:(NSAttributedString *)attributedString
 666 {
 667     // Put HTML on the pasteboard.
 668     if ([types containsObject:WebArchivePboardType]) {
 669         WebArchive *archive = [WebArchiver archiveSelectionInFrame:[self _frame]];
 670         [pasteboard setData:[archive data] forType:WebArchivePboardType];
 671     }
 672
 673     // Put the attributed string on the pasteboard (RTF/RTFD format).
 674     if ([types containsObject:NSRTFDPboardType]) {
 675         if (attributedString == nil) {
 676             attributedString = [self selectedAttributedString];
 677         }
 678         NSData *RTFDData = [attributedString RTFDFromRange:NSMakeRange(0, [attributedString length]) documentAttributes:nil];
 679         [pasteboard setData:RTFDData forType:NSRTFDPboardType];
 680     }
 681     if ([types containsObject:NSRTFPboardType]) {
 682         if (attributedString == nil) {
 683             attributedString = [self selectedAttributedString];
 684         }
 685         if ([attributedString containsAttachments]) {
 686             attributedString = [attributedString _web_attributedStringByStrippingAttachmentCharacters];
 687         }
 688         NSData *RTFData = [attributedString RTFFromRange:NSMakeRange(0, [attributedString length]) documentAttributes:nil];
 689         [pasteboard setData:RTFData forType:NSRTFPboardType];
 690     }
 691
 692     // Put plain string on the pasteboard.
 693     if ([types containsObject:NSStringPboardType]) {
 694         // Map &nbsp; to a plain old space because this is better for source code, other browsers do it,
 695         // and because HTML forces you to do this any time you want two spaces in a row.
 696         NSMutableString *s = [[self selectedString] mutableCopy];
 697         const unichar NonBreakingSpaceCharacter = 0xA0;
 698         NSString *NonBreakingSpaceString = [NSString stringWithCharacters:&NonBreakingSpaceCharacter length:1];
 699         [s replaceOccurrencesOfString:NonBreakingSpaceString withString:@" " options:0 range:NSMakeRange(0, [s length])];
 700         [pasteboard setString:s forType:NSStringPboardType];
 701         [s release];
 702     }
 703
 704     if ([self _canSmartCopyOrDelete] && [types containsObject:WebSmartPastePboardType]) {
 705         [pasteboard setData:nil forType:WebSmartPastePboardType];
 706     }
 707 }
 708
 709 - (void)_setMouseDownEvent:(NSEvent *)event
 710 {
 711     ASSERT(!event || [event type] == NSLeftMouseDown || [event type] == NSRightMouseDown || [event type] == NSOtherMouseDown);
 712
 713     if (event == _private->mouseDownEvent)
 714         return;
 715
 716     [event retain];
 717     [_private->mouseDownEvent release];
 718     _private->mouseDownEvent = event;
 719
 720     [_private->firstResponderTextViewAtMouseDownTime release];
 721
 722     // The only code that checks this ivar only cares about NSTextViews. The code used to be more general,
 723     // but it caused reference cycles leading to world leaks (see 4557386). We should be able to eliminate
 724     // firstResponderTextViewAtMouseDownTime entirely when all the form controls are native widgets, because
 725     // the only caller (in WebCore) will be unnecessary.
 726     if (event) {
 727         NSResponder *firstResponder = [[self window] firstResponder];
 728         if ([firstResponder isKindOfClass:[NSTextView class]])
 729             _private->firstResponderTextViewAtMouseDownTime = [firstResponder retain];
 730         else
 731             _private->firstResponderTextViewAtMouseDownTime = nil;
 732     } else
 733         _private->firstResponderTextViewAtMouseDownTime = nil;
 734 }
 735
 736 @end
 737
 738 @implementation WebHTMLView (WebPrivate)
 739
 740 + (NSArray *)supportedMIMETypes
 741 {
 742     return [WebHTMLRepresentation supportedMIMETypes];
 743 }
 744
 745 + (NSArray *)supportedImageMIMETypes
 746 {
 747     return [WebHTMLRepresentation supportedImageMIMETypes];
 748 }
 749
 750 + (NSArray *)supportedNonImageMIMETypes
 751 {
 752     return [WebHTMLRepresentation supportedNonImageMIMETypes];
 753 }
 754
 755 + (NSArray *)unsupportedTextMIMETypes
 756 {
 757     return [NSArray arrayWithObjects:
 758         @"text/calendar",       // iCal
 759         @"text/x-calendar",
 760         @"text/x-vcalendar",
 761         @"text/vcalendar",
 762         @"text/vcard",          // vCard
 763         @"text/x-vcard",
 764         @"text/directory",
 765         @"text/ldif",           // Netscape Address Book
 766         @"text/qif",            // Quicken
 767         @"text/x-qif",
 768         @"text/x-csv",          // CSV (for Address Book and Microsoft Outlook)
 769         @"text/x-vcf",          // vCard type used in Sun affinity app
 770         @"text/rtf",            // Rich Text Format
 771         nil];
 772 }
 773
 774 + (void)_postFlagsChangedEvent:(NSEvent *)flagsChangedEvent
 775 {
 776     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSMouseMoved
 777         location:[[flagsChangedEvent window] convertScreenToBase:[NSEvent mouseLocation]]
 778         modifierFlags:[flagsChangedEvent modifierFlags]
 779         timestamp:[flagsChangedEvent timestamp]
 780         windowNumber:[flagsChangedEvent windowNumber]
 781         context:[flagsChangedEvent context]
 782         eventNumber:0 clickCount:0 pressure:0];
 783
 784     // Pretend it's a mouse move.
 785     [[NSNotificationCenter defaultCenter]
 786         postNotificationName:WKMouseMovedNotification() object:self
 787         userInfo:[NSDictionary dictionaryWithObject:fakeEvent forKey:@"NSEvent"]];
 788 }
 789
 790 - (void)_updateMouseoverWithFakeEvent
 791 {
 792     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSMouseMoved
 793         location:[[self window] convertScreenToBase:[NSEvent mouseLocation]]
 794         modifierFlags:[[NSApp currentEvent] modifierFlags]
 795         timestamp:[NSDate timeIntervalSinceReferenceDate]
 796         windowNumber:[[self window] windowNumber]
 797         context:[[NSApp currentEvent] context]
 798         eventNumber:0 clickCount:0 pressure:0];
 799
 800     [self _updateMouseoverWithEvent:fakeEvent];
 801 }
 802
 803 - (void)_frameOrBoundsChanged
 804 {
 805     if (!NSEqualSizes(_private->lastLayoutSize, [(NSClipView *)[self superview] documentVisibleRect].size)) {
 806         [self setNeedsLayout:YES];
 807         [self setNeedsDisplay:YES];
 808         [_private->compController endRevertingChange:NO moveLeft:NO];
 809     }
 810
 811     NSPoint origin = [[self superview] bounds].origin;
 812     if (!NSEqualPoints(_private->lastScrollPosition, origin)) {
 813         [[self _bridge] sendScrollEvent];
 814         [_private->compController endRevertingChange:NO moveLeft:NO];
 815
 816         WebView *webView = [self _webView];
 817         [[webView _UIDelegateForwarder] webView:webView didScrollDocumentInFrameView:[self _frameView]];
 818     }
 819     _private->lastScrollPosition = origin;
 820
 821     SEL selector = @selector(_updateMouseoverWithFakeEvent);
 822     [NSObject cancelPreviousPerformRequestsWithTarget:self selector:selector object:nil];
 823     [self performSelector:selector withObject:nil afterDelay:0];
 824 }
 825
 826 - (void)_setAsideSubviews
 827 {
 828     ASSERT(!_private->subviewsSetAside);
 829     ASSERT(_private->savedSubviews == nil);
 830     _private->savedSubviews = _subviews;
 831     _subviews = nil;
 832     _private->subviewsSetAside = YES;
 833  }
 834
 835  - (void)_restoreSubviews
 836  {
 837     ASSERT(_private->subviewsSetAside);
 838     ASSERT(_subviews == nil);
 839     _subviews = _private->savedSubviews;
 840     _private->savedSubviews = nil;
 841     _private->subviewsSetAside = NO;
 842 }
 843
 844 // This is called when we are about to draw, but before our dirty rect is propagated to our ancestors.
 845 // That's the perfect time to do a layout, except that ideally we'd want to be sure that we're dirty
 846 // before doing it. As a compromise, when we're opaque we do the layout only when actually asked to
 847 // draw, but when we're transparent we do the layout at this stage so views behind us know that they
 848 // need to be redrawn (in case the layout causes some things to get dirtied).
 849 - (void)_propagateDirtyRectsToOpaqueAncestors
 850 {
 851     if (![[self _webView] drawsBackground]) {
 852         [self _web_layoutIfNeededRecursive];
 853     }
 854     [super _propagateDirtyRectsToOpaqueAncestors];
 855 }
 856
 857 // Don't let AppKit even draw subviews. We take care of that.
 858 - (void)_recursiveDisplayRectIfNeededIgnoringOpacity:(NSRect)rect isVisibleRect:(BOOL)isVisibleRect rectIsVisibleRectForView:(NSView *)visibleView topView:(BOOL)topView
 859 {
 860     // This helps when we print as part of a larger print process.
 861     // If the WebHTMLView itself is what we're printing, then we will never have to do this.
 862     BOOL wasInPrintingMode = _private->printing;
 863     BOOL isPrinting = ![NSGraphicsContext currentContextDrawingToScreen];
 864     if (wasInPrintingMode != isPrinting) {
 865         if (isPrinting) {
 866             [self _web_setPrintingModeRecursive];
 867         } else {
 868             [self _web_clearPrintingModeRecursive];
 869         }
 870     }
 871
 872     [self _web_layoutIfNeededRecursive: rect testDirtyRect:YES];
 873     [_subviews makeObjectsPerformSelector:@selector(_propagateDirtyRectsToOpaqueAncestors)];
 874
 875     [self _setAsideSubviews];
 876     [super _recursiveDisplayRectIfNeededIgnoringOpacity:rect isVisibleRect:isVisibleRect
 877         rectIsVisibleRectForView:visibleView topView:topView];
 878     [self _restoreSubviews];
 879
 880     if (wasInPrintingMode != isPrinting) {
 881         if (wasInPrintingMode) {
 882             [self _web_setPrintingModeRecursive];
 883         } else {
 884             [self _web_clearPrintingModeRecursive];
 885         }
 886     }
 887 }
 888
 889 // Don't let AppKit even draw subviews. We take care of that.
 890 - (void)_recursiveDisplayAllDirtyWithLockFocus:(BOOL)needsLockFocus visRect:(NSRect)visRect
 891 {
 892     BOOL needToSetAsideSubviews = !_private->subviewsSetAside;
 893
 894     BOOL wasInPrintingMode = _private->printing;
 895     BOOL isPrinting = ![NSGraphicsContext currentContextDrawingToScreen];
 896
 897     if (needToSetAsideSubviews) {
 898         // This helps when we print as part of a larger print process.
 899         // If the WebHTMLView itself is what we're printing, then we will never have to do this.
 900         if (wasInPrintingMode != isPrinting) {
 901             if (isPrinting) {
 902                 [self _web_setPrintingModeRecursive];
 903             } else {
 904                 [self _web_clearPrintingModeRecursive];
 905             }
 906         }
 907
 908         NSRect boundsBeforeLayout = [self bounds];
 909         [self _web_layoutIfNeededRecursive: visRect testDirtyRect:NO];
 910
 911         // If layout changes the view's bounds, then we need to recompute the visRect.
 912         // That's because the visRect passed to us was based on the bounds at the time
 913         // we were called. This method is only displayed to draw "all", so it's safe
 914         // to just call visibleRect to compute the entire rectangle.
 915         if (!NSEqualRects(boundsBeforeLayout, [self bounds])) {
 916             visRect = [self visibleRect];
 917         }
 918
 919         [self _setAsideSubviews];
 920     }
 921
 922     [super _recursiveDisplayAllDirtyWithLockFocus:needsLockFocus visRect:visRect];
 923
 924     if (needToSetAsideSubviews) {
 925         if (wasInPrintingMode != isPrinting) {
 926             if (wasInPrintingMode) {
 927                 [self _web_setPrintingModeRecursive];
 928             } else {
 929                 [self _web_clearPrintingModeRecursive];
 930             }
 931         }
 932
 933         [self _restoreSubviews];
 934     }
 935 }
 936
 937 - (WebHTMLView *)_topHTMLView
 938 {
 939     WebHTMLView *view = (WebHTMLView *)[[[[_private->dataSource _webView] mainFrame] frameView] documentView];
 940     ASSERT([view isKindOfClass:[WebHTMLView class]]);
 941     return view;
 942 }
 943
 944 - (BOOL)_isTopHTMLView
 945 {
 946     return self == [self _topHTMLView];
 947 }
 948
 949 - (BOOL)_insideAnotherHTMLView
 950 {
 951     return self != [self _topHTMLView];
 952 }
 953
 954 - (void)scrollPoint:(NSPoint)point
 955 {
 956     // Since we can't subclass NSTextView to do what we want, we have to second guess it here.
 957     // If we get called during the handling of a key down event, we assume the call came from
 958     // NSTextView, and ignore it and use our own code to decide how to page up and page down
 959     // We are smarter about how far to scroll, and we have "superview scrolling" logic.
 960     NSEvent *event = [[self window] currentEvent];
 961     if ([event type] == NSKeyDown) {
 962         const unichar pageUp = NSPageUpFunctionKey;
 963         if ([[event characters] rangeOfString:[NSString stringWithCharacters:&pageUp length:1]].length == 1) {
 964             [self tryToPerform:@selector(scrollPageUp:) with:nil];
 965             return;
 966         }
 967         const unichar pageDown = NSPageDownFunctionKey;
 968         if ([[event characters] rangeOfString:[NSString stringWithCharacters:&pageDown length:1]].length == 1) {
 969             [self tryToPerform:@selector(scrollPageDown:) with:nil];
 970             return;
 971         }
 972     }
 973
 974     [super scrollPoint:point];
 975 }
 976
 977 - (NSView *)hitTest:(NSPoint)point
 978 {
 979     // WebHTMLView objects handle all events for objects inside them.
 980     // To get those events, we prevent hit testing from AppKit.
 981
 982     // But there are three exceptions to this:
 983     //   1) For right mouse clicks and control clicks we don't yet have an implementation
 984     //      that works for nested views, so we let the hit testing go through the
 985     //      standard NSView code path (needs to be fixed, see bug 4361618).
 986     //   2) Java depends on doing a hit test inside it's mouse moved handling,
 987     //      so we let the hit testing go through the standard NSView code path
 988     //      when the current event is a mouse move (except when we are calling
 989     //      from _updateMouseoverWithEvent, so we have to use a global,
 990     //      forceWebHTMLViewHitTest, for that)
 991     //   3) The acceptsFirstMouse: and shouldDelayWindowOrderingForEvent: methods
 992     //      both need to figure out which view to check with inside the WebHTMLView.
 993     //      They use a global to change the behavior of hitTest: so they can get the
 994     //      right view. The global is forceNSViewHitTest and the method they use to
 995     //      do the hit testing is _hitViewForEvent:. (But this does not work correctly
 996     //      when there is HTML overlapping the view, see bug 4361626)
 997     //   4) NSAccessibilityHitTest relies on this for checking the cursor position.
 998     //      Our check for that is whether the event is NSFlagsChanged.  This works
 999     //      for VoiceOver's cntl-opt-f5 command (move focus to item under cursor)
1000     //      and Dictionary's cmd-cntl-D (open dictionary popup for item under cursor).
1001     //      This is of course a hack.
1002
1003     BOOL captureHitsOnSubviews;
1004     if (forceNSViewHitTest)
1005         captureHitsOnSubviews = NO;
1006     else if (forceWebHTMLViewHitTest)
1007         captureHitsOnSubviews = YES;
1008     else {
1009         NSEvent *event = [[self window] currentEvent];
1010         captureHitsOnSubviews = !([event type] == NSMouseMoved
1011             || [event type] == NSRightMouseDown
1012             || ([event type] == NSLeftMouseDown && ([event modifierFlags] & NSControlKeyMask) != 0)
1013             || [event type] == NSFlagsChanged);
1014     }
1015
1016     if (!captureHitsOnSubviews)
1017         return [super hitTest:point];
1018     if ([[self superview] mouse:point inRect:[self frame]])
1019         return self;
1020     return nil;
1021 }
1022
1023 static WebHTMLView *lastHitView = nil;
1024
1025 - (void)_clearLastHitViewIfSelf
1026 {
1027     if (lastHitView == self) {
1028         lastHitView = nil;
1029     }
1030 }
1031
1032 - (NSTrackingRectTag)addTrackingRect:(NSRect)rect owner:(id)owner userData:(void *)data assumeInside:(BOOL)assumeInside
1033 {
1034     ASSERT(_private->trackingRectOwner == nil);
1035     _private->trackingRectOwner = owner;
1036     _private->trackingRectUserData = data;
1037     return TRACKING_RECT_TAG;
1038 }
1039
1040 - (NSTrackingRectTag)_addTrackingRect:(NSRect)rect owner:(id)owner userData:(void *)data assumeInside:(BOOL)assumeInside useTrackingNum:(int)tag
1041 {
1042     ASSERT(tag == 0 || tag == TRACKING_RECT_TAG);
1043     ASSERT(_private->trackingRectOwner == nil);
1044     _private->trackingRectOwner = owner;
1045     _private->trackingRectUserData = data;
1046     return TRACKING_RECT_TAG;
1047 }
1048
1049 - (void)_addTrackingRects:(NSRect *)rects owner:(id)owner userDataList:(void **)userDataList assumeInsideList:(BOOL *)assumeInsideList trackingNums:(NSTrackingRectTag *)trackingNums count:(int)count
1050 {
1051     ASSERT(count == 1);
1052     ASSERT(trackingNums[0] == 0 || trackingNums[0] == TRACKING_RECT_TAG);
1053     ASSERT(_private->trackingRectOwner == nil);
1054     _private->trackingRectOwner = owner;
1055     _private->trackingRectUserData = userDataList[0];
1056     trackingNums[0] = TRACKING_RECT_TAG;
1057 }
1058
1059 - (void)removeTrackingRect:(NSTrackingRectTag)tag
1060 {
1061     if (tag == 0)
1062         return;
1063
1064     if (_private && (tag == TRACKING_RECT_TAG)) {
1065         _private->trackingRectOwner = nil;
1066         return;
1067     }
1068
1069     if (_private && (tag == _private->lastToolTipTag)) {
1070         [super removeTrackingRect:tag];
1071         _private->lastToolTipTag = 0;
1072         return;
1073     }
1074
1075     // If any other tracking rect is being removed, we don't know how it was created
1076     // and it's possible there's a leak involved (see 3500217)
1077     ASSERT_NOT_REACHED();
1078 }
1079
1080 - (void)_removeTrackingRects:(NSTrackingRectTag *)tags count:(int)count
1081 {
1082     int i;
1083     for (i = 0; i < count; ++i) {
1084         int tag = tags[i];
1085         if (tag == 0)
1086             continue;
1087         ASSERT(tag == TRACKING_RECT_TAG);
1088         if (_private != nil) {
1089             _private->trackingRectOwner = nil;
1090         }
1091     }
1092 }
1093
1094 - (void)_sendToolTipMouseExited
1095 {
1096     // Nothing matters except window, trackingNumber, and userData.
1097     NSEvent *fakeEvent = [NSEvent enterExitEventWithType:NSMouseExited
1098         location:NSMakePoint(0, 0)
1099         modifierFlags:0
1100         timestamp:0
1101         windowNumber:[[self window] windowNumber]
1102         context:NULL
1103         eventNumber:0
1104         trackingNumber:TRACKING_RECT_TAG
1105         userData:_private->trackingRectUserData];
1106     [_private->trackingRectOwner mouseExited:fakeEvent];
1107 }
1108
1109 - (void)_sendToolTipMouseEntered
1110 {
1111     // Nothing matters except window, trackingNumber, and userData.
1112     NSEvent *fakeEvent = [NSEvent enterExitEventWithType:NSMouseEntered
1113         location:NSMakePoint(0, 0)
1114         modifierFlags:0
1115         timestamp:0
1116         windowNumber:[[self window] windowNumber]
1117         context:NULL
1118         eventNumber:0
1119         trackingNumber:TRACKING_RECT_TAG
1120         userData:_private->trackingRectUserData];
1121     [_private->trackingRectOwner mouseEntered:fakeEvent];
1122 }
1123
1124 - (void)_setToolTip:(NSString *)string
1125 {
1126     NSString *toolTip = [string length] == 0 ? nil : string;
1127     NSString *oldToolTip = _private->toolTip;
1128     if ((toolTip == nil || oldToolTip == nil) ? toolTip == oldToolTip : [toolTip isEqualToString:oldToolTip]) {
1129         return;
1130     }
1131     if (oldToolTip) {
1132         [self _sendToolTipMouseExited];
1133         [oldToolTip release];
1134     }
1135     _private->toolTip = [toolTip copy];
1136     if (toolTip) {
1137         // See radar 3500217 for why we remove all tooltips rather than just the single one we created.
1138         [self removeAllToolTips];
1139         NSRect wideOpenRect = NSMakeRect(-100000, -100000, 200000, 200000);
1140         _private->lastToolTipTag = [self addToolTipRect:wideOpenRect owner:self userData:NULL];
1141         [self _sendToolTipMouseEntered];
1142     }
1143 }
1144
1145 - (NSString *)view:(NSView *)view stringForToolTip:(NSToolTipTag)tag point:(NSPoint)point userData:(void *)data
1146 {
1147     return [[_private->toolTip copy] autorelease];
1148 }
1149
1150 - (void)_updateMouseoverWithEvent:(NSEvent *)event
1151 {
1152     if (_private->closed)
1153         return;
1154
1155     NSView *contentView = [[event window] contentView];
1156     NSPoint locationForHitTest = [[contentView superview] convertPoint:[event locationInWindow] fromView:nil];
1157
1158     forceWebHTMLViewHitTest = YES;
1159     NSView *hitView = [contentView hitTest:locationForHitTest];
1160     forceWebHTMLViewHitTest = NO;
1161
1162     WebHTMLView *view = nil;
1163     if ([hitView isKindOfClass:[WebHTMLView class]])
1164         view = (WebHTMLView *)hitView;
1165
1166     if (view)
1167         [view retain];
1168
1169     if (lastHitView != view && lastHitView != nil) {
1170         // If we are moving out of a view (or frame), let's pretend the mouse moved
1171         // all the way out of that view. But we have to account for scrolling, because
1172         // khtml doesn't understand our clipping.
1173         NSRect visibleRect = [[[[lastHitView _frame] frameView] _scrollView] documentVisibleRect];
1174         float yScroll = visibleRect.origin.y;
1175         float xScroll = visibleRect.origin.x;
1176
1177         event = [NSEvent mouseEventWithType:NSMouseMoved
1178                          location:NSMakePoint(-1 - xScroll, -1 - yScroll )
1179                          modifierFlags:[[NSApp currentEvent] modifierFlags]
1180                          timestamp:[NSDate timeIntervalSinceReferenceDate]
1181                          windowNumber:[[view window] windowNumber]
1182                          context:[[NSApp currentEvent] context]
1183                          eventNumber:0 clickCount:0 pressure:0];
1184         [[lastHitView _bridge] mouseMoved:event];
1185     }
1186
1187     lastHitView = view;
1188
1189     if (view) {
1190         [[view _bridge] mouseMoved:event];
1191
1192         NSPoint point = [view convertPoint:[event locationInWindow] fromView:nil];
1193         NSDictionary *element = [view elementAtPoint:point];
1194
1195         // Have the web view send a message to the delegate so it can do status bar display.
1196         [[view _webView] _mouseDidMoveOverElement:element modifierFlags:[event modifierFlags]];
1197
1198         // Set a tool tip; it won't show up right away but will if the user pauses.
1199         NSString *newToolTip = nil;
1200         if (_private->showsURLsInToolTips) {
1201             DOMHTMLElement *domElement = [element objectForKey:WebElementDOMNodeKey];
1202             if ([domElement isKindOfClass:[DOMHTMLInputElement class]]) {
1203                 if ([[(DOMHTMLInputElement *)domElement type] isEqualToString:@"submit"])
1204                     newToolTip = [[(DOMHTMLInputElement *) domElement form] action];
1205             }
1206             if (newToolTip == nil)
1207                 newToolTip = [[element objectForKey:WebElementLinkURLKey] _web_userVisibleString];
1208         }
1209         if (newToolTip == nil)
1210             newToolTip = [element objectForKey:WebElementTitleKey];
1211         [view _setToolTip:newToolTip];
1212
1213         [view release];
1214     }
1215 }
1216
1217 + (NSArray *)_insertablePasteboardTypes
1218 {
1219     static NSArray *types = nil;
1220     if (!types) {
1221         types = [[NSArray alloc] initWithObjects:WebArchivePboardType, NSHTMLPboardType,
1222             NSFilenamesPboardType, NSTIFFPboardType, NSPICTPboardType, NSURLPboardType,
1223             NSRTFDPboardType, NSRTFPboardType, NSStringPboardType, NSColorPboardType, nil];
1224     }
1225     return types;
1226 }
1227
1228 + (NSArray *)_selectionPasteboardTypes
1229 {
1230     // FIXME: We should put data for NSHTMLPboardType on the pasteboard but Microsoft Excel doesn't like our format of HTML (3640423).
1231     return [NSArray arrayWithObjects:WebArchivePboardType, NSRTFDPboardType, NSRTFPboardType, NSStringPboardType, nil];
1232 }
1233
1234 - (NSImage *)_dragImageForLinkElement:(NSDictionary *)element
1235 {
1236     NSURL *linkURL = [element objectForKey: WebElementLinkURLKey];
1237
1238     BOOL drawURLString = YES;
1239     BOOL clipURLString = NO, clipLabelString = NO;
1240
1241     NSString *label = [element objectForKey: WebElementLinkLabelKey];
1242     NSString *urlString = [linkURL _web_userVisibleString];
1243
1244     if (!label) {
1245         drawURLString = NO;
1246         label = urlString;
1247     }
1248
1249     NSFont *labelFont = [[NSFontManager sharedFontManager] convertFont:[NSFont systemFontOfSize:DRAG_LINK_LABEL_FONT_SIZE]
1250                                                    toHaveTrait:NSBoldFontMask];
1251     NSFont *urlFont = [NSFont systemFontOfSize: DRAG_LINK_URL_FONT_SIZE];
1252     NSSize labelSize;
1253     labelSize.width = [label _web_widthWithFont: labelFont];
1254     labelSize.height = [labelFont ascender] - [labelFont descender];
1255     if (labelSize.width > MAX_DRAG_LABEL_WIDTH){
1256         labelSize.width = MAX_DRAG_LABEL_WIDTH;
1257         clipLabelString = YES;
1258     }
1259
1260     NSSize imageSize, urlStringSize;
1261     imageSize.width = labelSize.width + DRAG_LABEL_BORDER_X * 2.0f;
1262     imageSize.height = labelSize.height + DRAG_LABEL_BORDER_Y * 2.0f;
1263     if (drawURLString) {
1264         urlStringSize.width = [urlString _web_widthWithFont: urlFont];
1265         urlStringSize.height = [urlFont ascender] - [urlFont descender];
1266         imageSize.height += urlStringSize.height;
1267         if (urlStringSize.width > MAX_DRAG_LABEL_WIDTH) {
1268             imageSize.width = MAX(MAX_DRAG_LABEL_WIDTH + DRAG_LABEL_BORDER_X * 2.0f, MIN_DRAG_LABEL_WIDTH_BEFORE_CLIP);
1269             clipURLString = YES;
1270         } else {
1271             imageSize.width = MAX(labelSize.width + DRAG_LABEL_BORDER_X * 2.0f, urlStringSize.width + DRAG_LABEL_BORDER_X * 2.0f);
1272         }
1273     }
1274     NSImage *dragImage = [[[NSImage alloc] initWithSize: imageSize] autorelease];
1275     [dragImage lockFocus];
1276
1277     [[NSColor colorWithCalibratedRed: 0.7f green: 0.7f blue: 0.7f alpha: 0.8f] set];
1278
1279     // Drag a rectangle with rounded corners/
1280     NSBezierPath *path = [NSBezierPath bezierPath];
1281     [path appendBezierPathWithOvalInRect: NSMakeRect(0.0f, 0.0f, DRAG_LABEL_RADIUS * 2.0f, DRAG_LABEL_RADIUS * 2.0f)];
1282     [path appendBezierPathWithOvalInRect: NSMakeRect(0, imageSize.height - DRAG_LABEL_RADIUS * 2.0f, DRAG_LABEL_RADIUS * 2.0f, DRAG_LABEL_RADIUS * 2.0f)];
1283     [path appendBezierPathWithOvalInRect: NSMakeRect(imageSize.width - DRAG_LABEL_RADIUS * 2.0f, imageSize.height - DRAG_LABEL_RADIUS * 2.0f, DRAG_LABEL_RADIUS * 2.0f, DRAG_LABEL_RADIUS * 2.0f)];
1284     [path appendBezierPathWithOvalInRect: NSMakeRect(imageSize.width - DRAG_LABEL_RADIUS * 2.0f, 0.0f, DRAG_LABEL_RADIUS * 2.0f, DRAG_LABEL_RADIUS * 2.0f)];
1285
1286     [path appendBezierPathWithRect: NSMakeRect(DRAG_LABEL_RADIUS, 0.0f, imageSize.width - DRAG_LABEL_RADIUS * 2.0f, imageSize.height)];
1287     [path appendBezierPathWithRect: NSMakeRect(0.0f, DRAG_LABEL_RADIUS, DRAG_LABEL_RADIUS + 10.0f, imageSize.height - 2.0f * DRAG_LABEL_RADIUS)];
1288     [path appendBezierPathWithRect: NSMakeRect(imageSize.width - DRAG_LABEL_RADIUS - 20.0f, DRAG_LABEL_RADIUS, DRAG_LABEL_RADIUS + 20.0f, imageSize.height - 2.0f * DRAG_LABEL_RADIUS)];
1289     [path fill];
1290
1291     NSColor *topColor = [NSColor colorWithCalibratedWhite:0.0f alpha:0.75f];
1292     NSColor *bottomColor = [NSColor colorWithCalibratedWhite:1.0f alpha:0.5f];
1293     if (drawURLString) {
1294         if (clipURLString)
1295             urlString = [WebStringTruncator centerTruncateString: urlString toWidth:imageSize.width - (DRAG_LABEL_BORDER_X * 2.0f) withFont:urlFont];
1296
1297         [urlString _web_drawDoubledAtPoint:NSMakePoint(DRAG_LABEL_BORDER_X, DRAG_LABEL_BORDER_Y - [urlFont descender])
1298              withTopColor:topColor bottomColor:bottomColor font:urlFont];
1299     }
1300
1301     if (clipLabelString)
1302         label = [WebStringTruncator rightTruncateString: label toWidth:imageSize.width - (DRAG_LABEL_BORDER_X * 2.0f) withFont:labelFont];
1303     [label _web_drawDoubledAtPoint:NSMakePoint (DRAG_LABEL_BORDER_X, imageSize.height - DRAG_LABEL_BORDER_Y_OFFSET - [labelFont pointSize])
1304              withTopColor:topColor bottomColor:bottomColor font:labelFont];
1305
1306     [dragImage unlockFocus];
1307
1308     return dragImage;
1309 }
1310
1311 - (BOOL)_startDraggingImage:(NSImage *)wcDragImage at:(NSPoint)wcDragLoc operation:(NSDragOperation)op event:(NSEvent *)mouseDraggedEvent sourceIsDHTML:(BOOL)srcIsDHTML DHTMLWroteData:(BOOL)dhtmlWroteData
1312 {
1313     WebHTMLView *topHTMLView = [self _topHTMLView];
1314     if (self != topHTMLView) {
1315         [topHTMLView _setMouseDownEvent:_private->mouseDownEvent];
1316         BOOL result = [topHTMLView _startDraggingImage:wcDragImage at:wcDragLoc operation:op event:mouseDraggedEvent sourceIsDHTML:srcIsDHTML DHTMLWroteData:dhtmlWroteData];
1317         [topHTMLView _setMouseDownEvent:nil];
1318         return result;
1319     }
1320
1321     NSPoint mouseDownPoint = [self convertPoint:[_private->mouseDownEvent locationInWindow] fromView:nil];
1322     NSDictionary *element = [self elementAtPoint:mouseDownPoint allowShadowContent:YES];
1323
1324     NSURL *linkURL = [element objectForKey:WebElementLinkURLKey];
1325     NSURL *imageURL = [element objectForKey:WebElementImageURLKey];
1326     BOOL isSelected = [[element objectForKey:WebElementIsSelectedKey] boolValue];
1327
1328     [_private->draggingImageURL release];
1329     _private->draggingImageURL = nil;
1330
1331     NSPoint mouseDraggedPoint = [self convertPoint:[mouseDraggedEvent locationInWindow] fromView:nil];
1332     _private->webCoreDragOp = op;     // will be DragNone if WebCore doesn't care
1333     NSImage *dragImage = nil;
1334     NSPoint dragLoc = { 0, 0 }; // quiet gcc 4.0 warning
1335
1336     // We allow WebCore to override the drag image, even if its a link, image or text we're dragging.
1337     // This is in the spirit of the IE API, which allows overriding of pasteboard data and DragOp.
1338     // We could verify that ActionDHTML is allowed, although WebCore does claim to respect the action.
1339     if (wcDragImage) {
1340         dragImage = wcDragImage;
1341         // wcDragLoc is the cursor position relative to the lower-left corner of the image.
1342         // We add in the Y dimension because we are a flipped view, so adding moves the image down.
1343         if (linkURL)
1344             // see HACK below
1345             dragLoc = NSMakePoint(mouseDraggedPoint.x - wcDragLoc.x, mouseDraggedPoint.y + wcDragLoc.y);
1346         else
1347             dragLoc = NSMakePoint(mouseDownPoint.x - wcDragLoc.x, mouseDownPoint.y + wcDragLoc.y);
1348         _private->dragOffset = wcDragLoc;
1349     }
1350
1351     WebView *webView = [self _webView];
1352     NSPasteboard *pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
1353     BOOL startedDrag = YES;  // optimism - we almost always manage to start the drag
1354
1355     // note per kwebster, the offset arg below is always ignored in positioning the image
1356     DOMNode *node = [element objectForKey:WebElementDOMNodeKey];
1357     WebHTMLView *innerHTMLView = (WebHTMLView *)[[[[node ownerDocument] webFrame] frameView] documentView];
1358     ASSERT([innerHTMLView isKindOfClass:[WebHTMLView class]]);
1359     if (imageURL != nil
1360             && [node isKindOfClass:[DOMElement class]]
1361             && [(DOMElement *)node image]
1362             && (_private->dragSourceActionMask & WebDragSourceActionImage)) {
1363         id source = self;
1364         if (!dhtmlWroteData) {
1365             // Select the image when it is dragged. This allows the image to be moved via MoveSelectionCommandImpl and this matches NSTextView's behavior.
1366             ASSERT(node != nil);
1367             [webView setSelectedDOMRange:[[node ownerDocument] _createRangeWithNode:node] affinity:NSSelectionAffinityDownstream];
1368             _private->draggingImageURL = [imageURL retain];
1369
1370             WebArchive *archive;
1371
1372             // If the image element comes from an ImageDocument, we don't want to
1373             // create a web archive from the image element.
1374             if ([[self _bridge] canSaveAsWebArchive])
1375                 archive = [node webArchive];
1376             else
1377                 archive = [WebArchiver archiveMainResourceForFrame:[self _frame]];
1378
1379             source = [pasteboard _web_declareAndWriteDragImageForElement:(DOMElement *)node
1380                                                                      URL:linkURL ? linkURL : imageURL
1381                                                                    title:[element objectForKey:WebElementImageAltStringKey]
1382                                                                  archive:archive
1383                                                                   source:self];
1384         }
1385         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionImage fromPoint:mouseDownPoint withPasteboard:pasteboard];
1386         if (dragImage == nil)
1387             [self _web_DragImageForElement:(DOMElement *)node
1388                                       rect:[self convertRect:[[element objectForKey:WebElementImageRectKey] rectValue] fromView:innerHTMLView]
1389                                      event:_private->mouseDownEvent
1390                                 pasteboard:pasteboard
1391                                     source:source
1392                                     offset:&_private->dragOffset];
1393         else
1394             [self dragImage:dragImage
1395                          at:dragLoc
1396                      offset:NSZeroSize
1397                       event:_private->mouseDownEvent
1398                  pasteboard:pasteboard
1399                      source:source
1400                   slideBack:YES];
1401     } else if (linkURL && (_private->dragSourceActionMask & WebDragSourceActionLink)) {
1402         if (!dhtmlWroteData) {
1403             NSArray *types = [NSPasteboard _web_writableTypesForURL];
1404             [pasteboard declareTypes:types owner:self];
1405             [pasteboard _web_writeURL:linkURL andTitle:[element objectForKey:WebElementLinkLabelKey] types:types];
1406         }
1407         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionLink fromPoint:mouseDownPoint withPasteboard:pasteboard];
1408         if (dragImage == nil) {
1409             dragImage = [self _dragImageForLinkElement:element];
1410             NSSize offset = NSMakeSize([dragImage size].width / 2, -DRAG_LABEL_BORDER_Y);
1411             dragLoc = NSMakePoint(mouseDraggedPoint.x - offset.width, mouseDraggedPoint.y - offset.height);
1412             _private->dragOffset.x = offset.width;
1413             _private->dragOffset.y = -offset.height;        // inverted because we are flipped
1414         }
1415         // HACK:  We should pass the mouseDown event instead of the mouseDragged!  This hack gets rid of
1416         // a flash of the image at the mouseDown location when the drag starts.
1417         [self dragImage:dragImage
1418                      at:dragLoc
1419                  offset:NSZeroSize
1420                   event:mouseDraggedEvent
1421              pasteboard:pasteboard
1422                  source:self
1423               slideBack:YES];
1424     } else if (isSelected && (_private->dragSourceActionMask & WebDragSourceActionSelection)) {
1425         if (!dhtmlWroteData)
1426             [innerHTMLView _writeSelectionToPasteboard:pasteboard];
1427         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionSelection fromPoint:mouseDownPoint withPasteboard:pasteboard];
1428         if (dragImage == nil) {
1429             dragImage = [innerHTMLView _selectionDraggingImage];
1430             NSRect draggingRect = [self convertRect:[innerHTMLView _selectionDraggingRect] fromView:innerHTMLView];
1431             dragLoc = NSMakePoint(NSMinX(draggingRect), NSMaxY(draggingRect));
1432             _private->dragOffset.x = mouseDownPoint.x - dragLoc.x;
1433             _private->dragOffset.y = dragLoc.y - mouseDownPoint.y;        // inverted because we are flipped
1434         }
1435         [self dragImage:dragImage
1436                      at:dragLoc
1437                  offset:NSZeroSize
1438                   event:_private->mouseDownEvent
1439              pasteboard:pasteboard
1440                  source:self
1441               slideBack:YES];
1442     } else if (srcIsDHTML) {
1443         ASSERT(_private->dragSourceActionMask & WebDragSourceActionDHTML);
1444         [[webView _UIDelegateForwarder] webView:webView willPerformDragSourceAction:WebDragSourceActionDHTML fromPoint:mouseDownPoint withPasteboard:pasteboard];
1445         if (dragImage == nil) {
1446             // WebCore should have given us an image, but we'll make one up
1447             // FIXME: Oops! I removed this image from WebKit. Is this a dead code path?
1448             NSString *imagePath = [[NSBundle bundleForClass:[self class]] pathForResource:@"missing_image" ofType:@"tiff"];
1449             dragImage = [[[NSImage alloc] initWithContentsOfFile:imagePath] autorelease];
1450             NSSize imageSize = [dragImage size];
1451             dragLoc = NSMakePoint(mouseDownPoint.x - imageSize.width / 2, mouseDownPoint.y + imageSize.height / 2);
1452             _private->dragOffset.x = imageSize.width / 2;
1453             _private->dragOffset.y = imageSize.height / 2;
1454         }
1455         [self dragImage:dragImage
1456                      at:dragLoc
1457                  offset:NSZeroSize
1458                   event:_private->mouseDownEvent
1459              pasteboard:pasteboard
1460                  source:self
1461               slideBack:YES];
1462     } else {
1463         // Only way I know if to get here is if the original element clicked on in the mousedown is no longer
1464         // under the mousedown point, so linkURL, imageURL and isSelected are all false/nil.
1465         startedDrag = NO;
1466     }
1467     return startedDrag;
1468 }
1469
1470 - (BOOL)_mayStartDragAtEventLocation:(NSPoint)location
1471 {
1472     WebHTMLView *topHTMLView = [self _topHTMLView];
1473     if (self != topHTMLView)
1474         return [topHTMLView _mayStartDragAtEventLocation:location];
1475
1476     NSPoint mouseDownPoint = [self convertPoint:location fromView:nil];
1477     NSDictionary *mouseDownElement = [self elementAtPoint:mouseDownPoint allowShadowContent:YES];
1478
1479     ASSERT([self _webView]);
1480
1481     if ([mouseDownElement objectForKey:WebElementImageKey]
1482             && [mouseDownElement objectForKey:WebElementImageURLKey]
1483             && [[[self _webView] preferences] loadsImagesAutomatically]
1484             && (_private->dragSourceActionMask & WebDragSourceActionImage))
1485         return YES;
1486
1487     if ([mouseDownElement objectForKey:WebElementLinkURLKey]
1488             && (_private->dragSourceActionMask & WebDragSourceActionLink))
1489         return YES;
1490
1491     if ([[mouseDownElement objectForKey:WebElementIsSelectedKey] boolValue]
1492             && (_private->dragSourceActionMask & WebDragSourceActionSelection))
1493         return YES;
1494
1495     return NO;
1496 }
1497
1498 - (WebPluginController *)_pluginController
1499 {
1500     return _private->pluginController;
1501 }
1502
1503 - (void)_web_setPrintingModeRecursive
1504 {
1505     [self _setPrinting:YES minimumPageWidth:0.0f maximumPageWidth:0.0f adjustViewSize:NO];
1506     [super _web_setPrintingModeRecursive];
1507 }
1508
1509 - (void)_web_clearPrintingModeRecursive
1510 {
1511     [self _setPrinting:NO minimumPageWidth:0.0f maximumPageWidth:0.0f adjustViewSize:NO];
1512     [super _web_clearPrintingModeRecursive];
1513 }
1514
1515 - (void)_layoutIfNeeded
1516 {
1517     ASSERT(!_private->subviewsSetAside);
1518
1519     if ([[self _bridge] needsLayout])
1520         _private->needsLayout = YES;
1521     if (_private->needsToApplyStyles || _private->needsLayout)
1522         [self layout];
1523 }
1524
1525 - (void)_web_layoutIfNeededRecursive
1526 {
1527     [self _layoutIfNeeded];
1528     [super _web_layoutIfNeededRecursive];
1529 }
1530
1531 - (void)_web_layoutIfNeededRecursive:(NSRect)displayRect testDirtyRect:(bool)testDirtyRect
1532 {
1533     ASSERT(!_private->subviewsSetAside);
1534
1535     displayRect = NSIntersectionRect(displayRect, [self bounds]);
1536     if (testDirtyRect) {
1537         NSRect dirtyRect = [self _dirtyRect];
1538         displayRect = NSIntersectionRect(displayRect, dirtyRect);
1539     }
1540     if (!NSIsEmptyRect(displayRect))
1541         [self _layoutIfNeeded];
1542
1543     [super _web_layoutIfNeededRecursive:displayRect testDirtyRect:NO];
1544 }
1545
1546 - (void)_startAutoscrollTimer: (NSEvent *)triggerEvent
1547 {
1548     if (_private->autoscrollTimer == nil) {
1549         _private->autoscrollTimer = [[NSTimer scheduledTimerWithTimeInterval:AUTOSCROLL_INTERVAL
1550             target:self selector:@selector(_autoscroll) userInfo:nil repeats:YES] retain];
1551         _private->autoscrollTriggerEvent = [triggerEvent retain];
1552     }
1553 }
1554
1555 // FIXME: _selectionRect is deprecated in favor of selectionRect, which is in protocol WebDocumentSelection.
1556 // We can't remove this yet because it's still in use by Mail.
1557 - (NSRect)_selectionRect
1558 {
1559     return [self selectionRect];
1560 }
1561
1562 - (void)_stopAutoscrollTimer
1563 {
1564     NSTimer *timer = _private->autoscrollTimer;
1565     _private->autoscrollTimer = nil;
1566     [_private->autoscrollTriggerEvent release];
1567     _private->autoscrollTriggerEvent = nil;
1568     [timer invalidate];
1569     [timer release];
1570 }
1571
1572 - (void)_autoscroll
1573 {
1574     // Guarantee that the autoscroll timer is invalidated, even if we don't receive
1575     // a mouse up event.
1576     BOOL isStillDown = CGEventSourceButtonState(kCGEventSourceStateCombinedSessionState, kCGMouseButtonLeft);
1577     if (!isStillDown){
1578         [self _stopAutoscrollTimer];
1579         return;
1580     }
1581
1582     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSLeftMouseDragged
1583         location:[[self window] convertScreenToBase:[NSEvent mouseLocation]]
1584         modifierFlags:[[NSApp currentEvent] modifierFlags]
1585         timestamp:[NSDate timeIntervalSinceReferenceDate]
1586         windowNumber:[[self window] windowNumber]
1587         context:[[NSApp currentEvent] context]
1588         eventNumber:0 clickCount:0 pressure:0];
1589     [self mouseDragged:fakeEvent];
1590 }
1591
1592 - (BOOL)_canCopy
1593 {
1594     // Copying can be done regardless of whether you can edit.
1595     return [self _hasSelection] && [[self _bridge] mayCopy];
1596 }
1597
1598 - (BOOL)_canCut
1599 {
1600     return [self _canCopy] && [self _isEditable];
1601 }
1602
1603 - (BOOL)_canDelete
1604 {
1605     return [self _hasSelection] && [self _isEditable];
1606 }
1607
1608 - (BOOL)_canPaste
1609 {
1610     return [self _hasSelectionOrInsertionPoint] && [self _isEditable];
1611 }
1612
1613 - (BOOL)_canEdit
1614 {
1615     return [self _hasSelectionOrInsertionPoint] && [self _isEditable];
1616 }
1617
1618 - (BOOL)_canEditRichly
1619 {
1620     return [self _canEdit] && [[self _bridge] isSelectionRichlyEditable];
1621 }
1622
1623 - (BOOL)_canAlterCurrentSelection
1624 {
1625     return [self _hasSelectionOrInsertionPoint] && [self _isEditable];
1626 }
1627
1628 - (BOOL)_hasSelection
1629 {
1630     return [[self _bridge] selectionState] == WebSelectionStateRange;
1631 }
1632
1633 - (BOOL)_hasSelectionOrInsertionPoint
1634 {
1635     return [[self _bridge] selectionState] != WebSelectionStateNone;
1636 }
1637
1638 - (BOOL)_hasInsertionPoint
1639 {
1640     return [[self _bridge] selectionState] == WebSelectionStateCaret;
1641 }
1642
1643 - (BOOL)_isEditable
1644 {
1645     return [[self _webView] isEditable] || [[self _bridge] isSelectionEditable];
1646 }
1647
1648 - (BOOL)_isSelectionInPasswordField
1649 {
1650     return [[self _bridge] isSelectionInPasswordField];
1651 }
1652
1653 - (BOOL)_isSelectionMisspelled
1654 {
1655     NSString *selectedString = [self selectedString];
1656     unsigned length = [selectedString length];
1657     if (length == 0) {
1658         return NO;
1659     }
1660     NSRange range = [[NSSpellChecker sharedSpellChecker] checkSpellingOfString:selectedString
1661                                                                     startingAt:0
1662                                                                       language:nil
1663                                                                           wrap:NO
1664                                                         inSpellDocumentWithTag:[[self _webView] spellCheckerDocumentTag]
1665                                                                      wordCount:NULL];
1666     return range.length == length;
1667 }
1668
1669 - (NSArray *)_guessesForMisspelledSelection
1670 {
1671     ASSERT([[self selectedString] length] != 0);
1672     return [[NSSpellChecker sharedSpellChecker] guessesForWord:[self selectedString]];
1673 }
1674
1675 - (void)_changeSpellingFromMenu:(id)sender
1676 {
1677     ASSERT([[self selectedString] length] != 0);
1678     if ([self _shouldReplaceSelectionWithText:[sender title] givenAction:WebViewInsertActionPasted]) {
1679         [[self _bridge] replaceSelectionWithText:[sender title] selectReplacement:YES smartReplace:NO];
1680     }
1681 }
1682
1683 - (void)_ignoreSpellingFromMenu:(id)sender
1684 {
1685     ASSERT([[self selectedString] length] != 0);
1686     [[NSSpellChecker sharedSpellChecker] ignoreWord:[self selectedString] inSpellDocumentWithTag:[[self _webView] spellCheckerDocumentTag]];
1687 }
1688
1689 - (void)_learnSpellingFromMenu:(id)sender
1690 {
1691     ASSERT([[self selectedString] length] != 0);
1692     [[NSSpellChecker sharedSpellChecker] learnWord:[self selectedString]];
1693 }
1694
1695 - (void)_lookUpInDictionaryFromMenu:(id)sender
1696 {
1697     // This should only be called when there's a selection, but play it safe.
1698     if (![self _hasSelection]) {
1699         return;
1700     }
1701
1702     // Soft link to dictionary-display function to avoid linking another framework (ApplicationServices/LangAnalysis)
1703     static OSStatus (*__dictionaryServiceWindowShow)(id inWordString, NSRect inWordBoundary, UInt16 inLineDirection) = NULL;
1704     static const struct mach_header *frameworkImageHeader = NULL;
1705     static BOOL lookedForFunction = NO;
1706     if (!lookedForFunction) {
1707         __dictionaryServiceWindowShow = _NSSoftLinkingGetFrameworkFuncPtr(@"ApplicationServices", @"LangAnalysis", "_DCMDictionaryServiceWindowShow", &frameworkImageHeader);
1708         lookedForFunction = YES;
1709     }
1710     if (!__dictionaryServiceWindowShow) {
1711         LOG_ERROR("Couldn't find _DCMDictionaryServiceWindowShow");
1712         return;
1713     }
1714
1715     // FIXME: must check for right-to-left here
1716     NSWritingDirection writingDirection = NSWritingDirectionLeftToRight;
1717
1718     NSAttributedString *attrString = [self selectedAttributedString];
1719     // FIXME: the dictionary API expects the rect for the first line of selection. Passing
1720     // the rect for the entire selection, as we do here, positions the pop-up window near
1721     // the bottom of the selection rather than at the selected word.
1722     NSRect rect = [self convertRect:[[self _bridge] visibleSelectionRect] toView:nil];
1723     rect.origin = [[self window] convertBaseToScreen:rect.origin];
1724     NSData *data = [attrString RTFFromRange:NSMakeRange(0, [attrString length]) documentAttributes:nil];
1725     (void)__dictionaryServiceWindowShow(data, rect, (writingDirection == NSWritingDirectionRightToLeft) ? 1 : 0);
1726 }
1727
1728 - (BOOL)_transparentBackground
1729 {
1730     return _private->transparentBackground;
1731 }
1732
1733 - (void)_setTransparentBackground:(BOOL)f
1734 {
1735     _private->transparentBackground = f;
1736 }
1737
1738 - (NSImage *)_selectionDraggingImage
1739 {
1740     if ([self _hasSelection]) {
1741         NSImage *dragImage = [[self _bridge] selectionImageForcingWhiteText:NO];
1742         [dragImage _web_dissolveToFraction:WebDragImageAlpha];
1743         return dragImage;
1744     }
1745     return nil;
1746 }
1747
1748 - (NSRect)_selectionDraggingRect
1749 {
1750     // Mail currently calls this method. We can eliminate it when Mail no longer calls it.
1751     return [self selectionImageRect];
1752 }
1753
1754 - (BOOL)_canIncreaseSelectionListLevel
1755 {
1756     return ([self _canEditRichly] && [[self _bridge] canIncreaseSelectionListLevel]);
1757 }
1758
1759 - (BOOL)_canDecreaseSelectionListLevel
1760 {
1761     return ([self _canEditRichly] && [[self _bridge] canDecreaseSelectionListLevel]);
1762 }
1763
1764 - (DOMNode *)_increaseSelectionListLevel
1765 {
1766     if (![self _canEditRichly])
1767         return nil;
1768
1769     WebFrameBridge *bridge = [self _bridge];
1770     return [bridge increaseSelectionListLevel];
1771 }
1772
1773 - (DOMNode *)_increaseSelectionListLevelOrdered
1774 {
1775     if (![self _canEditRichly])
1776         return nil;
1777
1778     WebFrameBridge *bridge = [self _bridge];
1779     return [bridge increaseSelectionListLevelOrdered];
1780 }
1781
1782 - (DOMNode *)_increaseSelectionListLevelUnordered
1783 {
1784     if (![self _canEditRichly])
1785         return nil;
1786
1787     WebFrameBridge *bridge = [self _bridge];
1788     return [bridge increaseSelectionListLevelUnordered];
1789 }
1790
1791 - (void)_decreaseSelectionListLevel
1792 {
1793     if (![self _canEditRichly])
1794         return;
1795
1796     WebFrameBridge *bridge = [self _bridge];
1797     [bridge decreaseSelectionListLevel];
1798 }
1799
1800 - (void)_setHighlighter:(id<WebHTMLHighlighter>)highlighter ofType:(NSString*)type
1801 {
1802     if (!_private->highlighters)
1803         _private->highlighters = [[NSMutableDictionary alloc] init];
1804     [_private->highlighters setObject:highlighter forKey:type];
1805 }
1806
1807 - (void)_removeHighlighterOfType:(NSString*)type
1808 {
1809     [_private->highlighters removeObjectForKey:type];
1810 }
1811
1812 - (BOOL)_web_firstResponderCausesFocusDisplay
1813 {
1814     return [self _web_firstResponderIsSelfOrDescendantView] || [[self window] firstResponder] == [self _frameView];
1815 }
1816
1817 - (void)_updateActiveState
1818 {
1819     // This method does the job of updating the view based on the view's firstResponder-ness and
1820     // the window key-ness of the window containing this view. This involves four kinds of
1821     // drawing updates right now, all handled in WebCore in response to the call over the bridge.
1822     //
1823     // The four display attributes are as follows:
1824     //
1825     // 1. The background color used to draw behind selected content (active | inactive color)
1826     // 2. Caret blinking (blinks | does not blink)
1827     // 3. The drawing of a focus ring around links in web pages.
1828     // 4. Changing the tint of controls from clear to aqua/graphite and vice versa
1829     //
1830     // Also, this is responsible for letting the bridge know if the window has gained or lost focus
1831     // so we can send focus and blur events.
1832
1833     NSWindow *window = [self window];
1834     BOOL windowIsKey = [window isKeyWindow];
1835     BOOL windowOrSheetIsKey = windowIsKey || [[window attachedSheet] isKeyWindow];
1836
1837     BOOL isActive = !_private->resigningFirstResponder && windowIsKey && (_private->descendantBecomingFirstResponder || [self _web_firstResponderCausesFocusDisplay]);
1838
1839     [[self _bridge] setWindowHasFocus:windowOrSheetIsKey];
1840     [[self _bridge] setIsActive:isActive];
1841 }
1842
1843 - (unsigned)markAllMatchesForText:(NSString *)string caseSensitive:(BOOL)caseFlag limit:(unsigned)limit
1844 {
1845     return [[self _bridge] markAllMatchesForText:string caseSensitive:caseFlag limit:limit];
1846 }
1847
1848 - (void)setMarkedTextMatchesAreHighlighted:(BOOL)newValue
1849 {
1850     [[self _bridge] setMarkedTextMatchesAreHighlighted:newValue];
1851 }
1852
1853 - (BOOL)markedTextMatchesAreHighlighted
1854 {
1855     return [[self _bridge] markedTextMatchesAreHighlighted];
1856 }
1857
1858 - (void)unmarkAllTextMatches
1859 {
1860     return [[self _bridge] unmarkAllTextMatches];
1861 }
1862
1863 - (NSArray *)rectsForTextMatches
1864 {
1865     return [[self _bridge] rectsForTextMatches];
1866 }
1867
1868 - (void)_writeSelectionToPasteboard:(NSPasteboard *)pasteboard
1869 {
1870     ASSERT([self _hasSelection]);
1871     NSArray *types = [self pasteboardTypesForSelection];
1872
1873     // Don't write RTFD to the pasteboard when the copied attributed string has no attachments.
1874     NSAttributedString *attributedString = [self selectedAttributedString];
1875     NSMutableArray *mutableTypes = nil;
1876     if (![attributedString containsAttachments]) {
1877         mutableTypes = [types mutableCopy];
1878         [mutableTypes removeObject:NSRTFDPboardType];
1879         types = mutableTypes;
1880     }
1881
1882     [pasteboard declareTypes:types owner:nil];
1883     [self _writeSelectionWithPasteboardTypes:types toPasteboard:pasteboard cachedAttributedString:attributedString];
1884     [mutableTypes release];
1885 }
1886
1887 - (void)close
1888 {
1889     if (_private->closed)
1890         return;
1891     [self _clearLastHitViewIfSelf];
1892     // FIXME: This is slow; should remove individual observers instead.
1893     [[NSNotificationCenter defaultCenter] removeObserver:self];
1894     [_private->pluginController destroyAllPlugins];
1895     // remove tooltips before clearing _private so removeTrackingRect: will work correctly
1896     [self removeAllToolTips];
1897     _private->closed = YES;
1898 }
1899
1900 @end
1901
1902 @implementation NSView (WebHTMLViewFileInternal)
1903
1904 - (void)_web_setPrintingModeRecursive
1905 {
1906     [_subviews makeObjectsPerformSelector:@selector(_web_setPrintingModeRecursive)];
1907 }
1908
1909 - (void)_web_clearPrintingModeRecursive
1910 {
1911     [_subviews makeObjectsPerformSelector:@selector(_web_clearPrintingModeRecursive)];
1912 }
1913
1914 - (void)_web_layoutIfNeededRecursive
1915 {
1916     [_subviews makeObjectsPerformSelector:@selector(_web_layoutIfNeededRecursive)];
1917 }
1918
1919 - (void)_web_layoutIfNeededRecursive: (NSRect)rect testDirtyRect:(bool)testDirtyRect
1920 {
1921     unsigned index, count;
1922     for (index = 0, count = [(NSArray *)_subviews count]; index < count; index++) {
1923         NSView *subview = [_subviews objectAtIndex:index];
1924         NSRect dirtiedSubviewRect = [subview convertRect: rect fromView: self];
1925         [subview _web_layoutIfNeededRecursive: dirtiedSubviewRect testDirtyRect:testDirtyRect];
1926     }
1927 }
1928
1929 @end
1930
1931 @implementation NSMutableDictionary (WebHTMLViewFileInternal)
1932
1933 - (void)_web_setObjectIfNotNil:(id)object forKey:(id)key
1934 {
1935     if (object == nil) {
1936         [self removeObjectForKey:key];
1937     } else {
1938         [self setObject:object forKey:key];
1939     }
1940 }
1941
1942 @end
1943
1944 // The following is a workaround for
1945 // <rdar://problem/3429631> window stops getting mouse moved events after first tooltip appears
1946 // The trick is to define a category on NSToolTipPanel that implements setAcceptsMouseMovedEvents:.
1947 // Since the category will be searched before the real class, we'll prevent the flag from being
1948 // set on the tool tip panel.
1949
1950 @interface NSToolTipPanel : NSPanel
1951 @end
1952
1953 @interface NSToolTipPanel (WebHTMLViewFileInternal)
1954 @end
1955
1956 @implementation NSToolTipPanel (WebHTMLViewFileInternal)
1957
1958 - (void)setAcceptsMouseMovedEvents:(BOOL)flag
1959 {
1960     // Do nothing, preventing the tool tip panel from trying to accept mouse-moved events.
1961 }
1962
1963 @end
1964
1965 @interface NSArray (WebHTMLView)
1966 - (void)_web_makePluginViewsPerformSelector:(SEL)selector withObject:(id)object;
1967 @end
1968
1969 @implementation WebHTMLView
1970
1971 + (void)initialize
1972 {
1973     [NSApp registerServicesMenuSendTypes:[[self class] _selectionPasteboardTypes]
1974                              returnTypes:[[self class] _insertablePasteboardTypes]];
1975     _NSInitializeKillRing();
1976 }
1977
1978 - (void)_resetCachedWebPreferences:(NSNotification *)ignored
1979 {
1980     WebPreferences *preferences = [[self _webView] preferences];
1981     // Check for nil because we might not yet have an associated webView when this is called
1982     if (preferences == nil) {
1983         preferences = [WebPreferences standardPreferences];
1984     }
1985     _private->showsURLsInToolTips = [preferences showsURLsInToolTips];
1986 }
1987
1988 - (id)initWithFrame:(NSRect)frame
1989 {
1990     self = [super initWithFrame:frame];
1991     if (!self)
1992         return nil;
1993
1994     // Make all drawing go through us instead of subviews.
1995     if (NSAppKitVersionNumber >= 711) {
1996         [self _setDrawsOwnDescendants:YES];
1997     }
1998
1999     _private = [[WebHTMLViewPrivate alloc] init];
2000
2001     _private->pluginController = [[WebPluginController alloc] initWithDocumentView:self];
2002     _private->needsLayout = YES;
2003     [self _resetCachedWebPreferences:nil];
2004     [[NSNotificationCenter defaultCenter]
2005             addObserver:self selector:@selector(_resetCachedWebPreferences:)
2006                    name:WebPreferencesChangedNotification object:nil];
2007
2008     return self;
2009 }
2010
2011 - (void)dealloc
2012 {
2013     // We can't assert that close has already been called because
2014     // this view can be removed from it's superview, even though
2015     // it could be needed later, so close if needed.
2016     [self close];
2017     [_private release];
2018     _private = nil;
2019     [super dealloc];
2020 }
2021
2022 - (void)finalize
2023 {
2024     // We can't assert that close has already been called because
2025     // this view can be removed from it's superview, even though
2026     // it could be needed later, so close if needed.
2027     [self close];
2028     [super finalize];
2029 }
2030
2031 - (IBAction)takeFindStringFromSelection:(id)sender
2032 {
2033     if (![self _hasSelection]) {
2034         NSBeep();
2035         return;
2036     }
2037
2038     [NSPasteboard _web_setFindPasteboardString:[self selectedString] withOwner:self];
2039 }
2040
2041 - (BOOL)writeSelectionToPasteboard:(NSPasteboard *)pasteboard types:(NSArray *)types
2042 {
2043     [pasteboard declareTypes:types owner:nil];
2044     [self writeSelectionWithPasteboardTypes:types toPasteboard:pasteboard];
2045     return YES;
2046 }
2047
2048 - (BOOL)readSelectionFromPasteboard:(NSPasteboard *)pasteboard
2049 {
2050     if ([[self _bridge] isSelectionRichlyEditable])
2051         [self _pasteWithPasteboard:pasteboard allowPlainText:YES];
2052     else
2053         [self _pasteAsPlainTextWithPasteboard:pasteboard];
2054     return YES;
2055 }
2056
2057 - (id)validRequestorForSendType:(NSString *)sendType returnType:(NSString *)returnType
2058 {
2059     if (sendType != nil && [[self pasteboardTypesForSelection] containsObject:sendType] && [self _hasSelection]) {
2060         return self;
2061     } else if (returnType != nil && [[[self class] _insertablePasteboardTypes] containsObject:returnType] && [self _isEditable]) {
2062         return self;
2063     }
2064     return [[self nextResponder] validRequestorForSendType:sendType returnType:returnType];
2065 }
2066
2067 - (void)selectAll:(id)sender
2068 {
2069     [self selectAll];
2070 }
2071
2072 // jumpToSelection is the old name for what AppKit now calls centerSelectionInVisibleArea. Safari
2073 // was using the old jumpToSelection selector in its menu. Newer versions of Safari will us the
2074 // selector centerSelectionInVisibleArea. We'll leave this old selector in place for two reasons:
2075 // (1) compatibility between older Safari and newer WebKit; (2) other WebKit-based applications
2076 // might be using the jumpToSelection: selector, and we don't want to break them.
2077 - (void)jumpToSelection:(id)sender
2078 {
2079     [self centerSelectionInVisibleArea:sender];
2080 }
2081
2082 - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)item
2083 {
2084     SEL action = [item action];
2085     WebFrameBridge *bridge = [self _bridge];
2086
2087     if (action == @selector(changeSpelling:)
2088             || action == @selector(_changeSpellingFromMenu:)
2089             || action == @selector(checkSpelling:)
2090             || action == @selector(complete:)
2091             || action == @selector(deleteBackward:)
2092             || action == @selector(deleteBackwardByDecomposingPreviousCharacter:)
2093             || action == @selector(deleteForward:)
2094             || action == @selector(deleteToBeginningOfLine:)
2095             || action == @selector(deleteToBeginningOfParagraph:)
2096             || action == @selector(deleteToEndOfLine:)
2097             || action == @selector(deleteToEndOfParagraph:)
2098             || action == @selector(deleteToMark:)
2099             || action == @selector(deleteWordBackward:)
2100             || action == @selector(deleteWordForward:)
2101             || action == @selector(insertBacktab:)
2102             || action == @selector(insertLineBreak:)
2103             || action == @selector(insertNewline:)
2104             || action == @selector(insertNewlineIgnoringFieldEditor:)
2105             || action == @selector(insertParagraphSeparator:)
2106             || action == @selector(insertTab:)
2107             || action == @selector(insertTabIgnoringFieldEditor:)
2108             || action == @selector(moveBackward:)
2109             || action == @selector(moveBackwardAndModifySelection:)
2110             || action == @selector(moveDown:)
2111             || action == @selector(moveDownAndModifySelection:)
2112             || action == @selector(moveForward:)
2113             || action == @selector(moveForwardAndModifySelection:)
2114             || action == @selector(moveLeft:)
2115             || action == @selector(moveLeftAndModifySelection:)
2116             || action == @selector(moveParagraphBackwardAndModifySelection:)
2117             || action == @selector(moveParagraphForwardAndModifySelection:)
2118             || action == @selector(moveRight:)
2119             || action == @selector(moveRightAndModifySelection:)
2120             || action == @selector(moveToBeginningOfDocument:)
2121             || action == @selector(moveToBeginningOfDocumentAndModifySelection:)
2122             || action == @selector(moveToBeginningOfSentence:)
2123             || action == @selector(moveToBeginningOfSentenceAndModifySelection:)
2124             || action == @selector(moveToBeginningOfLine:)
2125             || action == @selector(moveToBeginningOfLineAndModifySelection:)
2126             || action == @selector(moveToBeginningOfParagraph:)
2127             || action == @selector(moveToBeginningOfParagraphAndModifySelection:)
2128             || action == @selector(moveToEndOfDocument:)
2129             || action == @selector(moveToEndOfDocumentAndModifySelection:)
2130             || action == @selector(moveToEndOfSentence:)
2131             || action == @selector(moveToEndOfSentenceAndModifySelection:)
2132             || action == @selector(moveToEndOfLine:)
2133             || action == @selector(moveToEndOfLineAndModifySelection:)
2134             || action == @selector(moveToEndOfParagraph:)
2135             || action == @selector(moveToEndOfParagraphAndModifySelection:)
2136             || action == @selector(moveUp:)
2137             || action == @selector(moveUpAndModifySelection:)
2138             || action == @selector(moveWordBackward:)
2139             || action == @selector(moveWordBackwardAndModifySelection:)
2140             || action == @selector(moveWordForward:)
2141             || action == @selector(moveWordForwardAndModifySelection:)
2142             || action == @selector(moveWordLeft:)
2143             || action == @selector(moveWordLeftAndModifySelection:)
2144             || action == @selector(moveWordRight:)
2145             || action == @selector(moveWordRightAndModifySelection:)
2146             || action == @selector(pageDown:)
2147             || action == @selector(pageDownAndModifySelection:)
2148             || action == @selector(pageUp:)
2149             || action == @selector(pageUpAndModifySelection:)
2150             || action == @selector(pasteFont:)
2151             || action == @selector(showGuessPanel:)
2152             || action == @selector(transpose:)
2153             || action == @selector(yank:)
2154             || action == @selector(yankAndSelect:)) {
2155         return [self _canEdit];
2156     } else if (action == @selector(changeBaseWritingDirection:)) {
2157         NSMenuItem *menuItem = (NSMenuItem *)item;
2158         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
2159             NSWritingDirection writingDirection = [item tag];
2160             if (writingDirection == NSWritingDirectionNatural) {
2161                 [menuItem setState:NO];
2162                 return NO;
2163             }
2164             DOMCSSStyleDeclaration* style = [self _emptyStyle];
2165             [style setDirection:writingDirection == NSWritingDirectionLeftToRight ? @"LTR" : @"RTL"];
2166             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
2167         }
2168         return [self _canEdit];
2169     } else if (action == @selector(toggleBaseWritingDirection:)) {
2170         NSMenuItem *menuItem = (NSMenuItem *)item;
2171         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
2172             DOMCSSStyleDeclaration* rtl = [self _emptyStyle];
2173             [rtl setDirection:@"RTL"];
2174             // Take control of the title of the menu item, instead of just checking/unchecking it because otherwise
2175             // we don't know what the check would mean.
2176             [menuItem setTitle:[[self _bridge] selectionHasStyle:rtl] ? UI_STRING("Left to Right", "Left to Right context menu item") : UI_STRING("Right to Left", "Right to Left context menu item")];
2177         }
2178         return [self _canEdit];
2179     } else if (action == @selector(alignCenter:)
2180             || action == @selector(alignLeft:)
2181             || action == @selector(alignJustified:)
2182             || action == @selector(alignRight:)
2183             || action == @selector(changeAttributes:)
2184             || action == @selector(changeColor:)
2185             || action == @selector(changeFont:)) {
2186         return [self _canEditRichly];
2187     } else if (action == @selector(capitalizeWord:)
2188                || action == @selector(lowercaseWord:)
2189                || action == @selector(uppercaseWord:)) {
2190         return [self _hasSelection] && [self _isEditable];
2191     } else if (action == @selector(centerSelectionInVisibleArea:)
2192                || action == @selector(jumpToSelection:)
2193                || action == @selector(copyFont:)
2194                || action == @selector(setMark:)) {
2195         return [self _hasSelection] || ([self _isEditable] && [self _hasInsertionPoint]);
2196     } else if (action == @selector(changeDocumentBackgroundColor:)) {
2197         return [[self _webView] isEditable] && [self _canEditRichly];
2198     } else if (action == @selector(copy:)) {
2199         return [bridge mayDHTMLCopy] || [self _canCopy];
2200     } else if (action == @selector(cut:)) {
2201         return [bridge mayDHTMLCut] || [self _canCut];
2202     } else if (action == @selector(delete:)) {
2203         return [self _canDelete];
2204     } else if (action == @selector(_ignoreSpellingFromMenu:)
2205             || action == @selector(_learnSpellingFromMenu:)
2206             || action == @selector(takeFindStringFromSelection:)) {
2207         return [self _hasSelection];
2208     } else if (action == @selector(paste:) || action == @selector(pasteAsPlainText:)) {
2209         return [bridge mayDHTMLPaste] || [self _canPaste];
2210     } else if (action == @selector(pasteAsRichText:)) {
2211         return [bridge mayDHTMLPaste] || ([self _canPaste] && [[self _bridge] isSelectionRichlyEditable]);
2212     } else if (action == @selector(performFindPanelAction:)) {
2213         // FIXME: Not yet implemented.
2214         return NO;
2215     } else if (action == @selector(selectToMark:)
2216             || action == @selector(swapWithMark:)) {
2217         return [self _hasSelectionOrInsertionPoint] && [[self _bridge] markDOMRange] != nil;
2218     } else if (action == @selector(subscript:)) {
2219         NSMenuItem *menuItem = (NSMenuItem *)item;
2220         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
2221             DOMCSSStyleDeclaration *style = [self _emptyStyle];
2222             [style setVerticalAlign:@"sub"];
2223             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
2224         }
2225         return [self _canEditRichly];
2226     } else if (action == @selector(superscript:)) {
2227         NSMenuItem *menuItem = (NSMenuItem *)item;
2228         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
2229             DOMCSSStyleDeclaration *style = [self _emptyStyle];
2230             [style setVerticalAlign:@"super"];
2231             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
2232         }
2233         return [self _canEditRichly];
2234     } else if (action == @selector(underline:)) {
2235         NSMenuItem *menuItem = (NSMenuItem *)item;
2236         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
2237             DOMCSSStyleDeclaration *style = [self _emptyStyle];
2238             [style setProperty:@"-khtml-text-decorations-in-effect" value:@"underline" priority:@""];
2239             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
2240         }
2241         return [self _canEditRichly];
2242     } else if (action == @selector(unscript:)) {
2243         NSMenuItem *menuItem = (NSMenuItem *)item;
2244         if ([menuItem isKindOfClass:[NSMenuItem class]]) {
2245             DOMCSSStyleDeclaration *style = [self _emptyStyle];
2246             [style setVerticalAlign:@"baseline"];
2247             [menuItem setState:[[self _bridge] selectionHasStyle:style]];
2248         }
2249         return [self _canEditRichly];
2250     } else if (action == @selector(_lookUpInDictionaryFromMenu:)) {
2251         return [self _hasSelection];
2252     }
2253
2254     return YES;
2255 }
2256
2257 - (BOOL)acceptsFirstResponder
2258 {
2259     // Don't accept first responder when we first click on this view.
2260     // We have to pass the event down through WebCore first to be sure we don't hit a subview.
2261     // Do accept first responder at any other time, for example from keyboard events,
2262     // or from calls back from WebCore once we begin mouse-down event handling.
2263     NSEvent *event = [NSApp currentEvent];
2264     if ([event type] == NSLeftMouseDown
2265             && !_private->handlingMouseDownEvent
2266             && NSPointInRect([event locationInWindow], [self convertRect:[self visibleRect] toView:nil])) {
2267         return NO;
2268     }
2269     return YES;
2270 }
2271
2272 - (BOOL)maintainsInactiveSelection
2273 {
2274     // This method helps to determine whether the WebHTMLView should maintain
2275     // an inactive selection when it's not first responder.
2276     // Traditionally, these views have not maintained such selections,
2277     // clearing them when the view was not first responder. However,
2278     // to fix bugs like this one:
2279     // <rdar://problem/3672088>: "Editable WebViews should maintain a selection even
2280     //                            when they're not firstResponder"
2281     // it was decided to add a switch to act more like an NSTextView.
2282     id nextResponder = [[self window] _newFirstResponderAfterResigning];
2283
2284     // Predict the case where we are losing first responder status only to
2285     // gain it back again.  Want to keep the selection in that case.
2286     if ([nextResponder isKindOfClass:[NSScrollView class]]) {
2287         id contentView = [nextResponder contentView];
2288         if (contentView) {
2289             nextResponder = contentView;
2290         }
2291     }
2292     if ([nextResponder isKindOfClass:[NSClipView class]]) {
2293         id documentView = [nextResponder documentView];
2294         if (documentView) {
2295             nextResponder = documentView;
2296         }
2297     }
2298
2299     if (nextResponder == self)
2300         return YES;
2301
2302     BOOL nextResponderIsInWebView = [nextResponder isKindOfClass:[NSView class]] && [nextResponder isDescendantOf:[[[self _webView] mainFrame] frameView]];
2303
2304     return [[self _webView] maintainsInactiveSelection] || ([[self _bridge] isSelectionEditable] && nextResponderIsInWebView);
2305 }
2306
2307 - (void)addMouseMovedObserver
2308 {
2309     if (!_private->dataSource || ![self _isTopHTMLView])
2310         return;
2311
2312     // Unless the Dashboard asks us to do this for all windows, keep an observer going only for the key window.
2313     if (!([[self window] isKeyWindow] || [[self _webView] _dashboardBehavior:WebDashboardBehaviorAlwaysSendMouseEventsToAllWindows]))
2314         return;
2315
2316     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(mouseMovedNotification:)
2317         name:WKMouseMovedNotification() object:nil];
2318     [self _frameOrBoundsChanged];
2319 }
2320
2321 - (void)removeMouseMovedObserver
2322 {
2323     // Don't remove the observer if we're running the Dashboard.
2324     // FIXME: Right for the windowDidResignKey: case, but wrong for the viewWillMoveToWindow: case.
2325     if ([[self _webView] _dashboardBehavior:WebDashboardBehaviorAlwaysSendMouseEventsToAllWindows])
2326         return;
2327
2328     [[self _webView] _mouseDidMoveOverElement:nil modifierFlags:0];
2329     [[NSNotificationCenter defaultCenter] removeObserver:self
2330         name:WKMouseMovedNotification() object:nil];
2331 }
2332
2333 - (void)addSuperviewObservers
2334 {
2335     // We watch the bounds of our superview, so that we can do a layout when the size
2336     // of the superview changes. This is different from other scrollable things that don't
2337     // need this kind of thing because their layout doesn't change.
2338
2339     // We need to pay attention to both height and width because our "layout" has to change
2340     // to extend the background the full height of the space and because some elements have
2341     // sizes that are based on the total size of the view.
2342
2343     NSView *superview = [self superview];
2344     if (superview && [self window]) {
2345         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_frameOrBoundsChanged)
2346             name:NSViewFrameDidChangeNotification object:superview];
2347         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_frameOrBoundsChanged)
2348             name:NSViewBoundsDidChangeNotification object:superview];
2349
2350         // In addition to registering for frame/bounds change notifications, call -_frameOrBoundsChanged.
2351         // It will check the current size/scroll against the previous layout's size/scroll.  We need to
2352         // do this here to catch the case where the WebView is laid out at one size, removed from its
2353         // window, resized, and inserted into another window.  Our frame/bounds changed notifications
2354         // will not be sent in that situation, since we only watch for changes while in the view hierarchy.
2355         [self _frameOrBoundsChanged];
2356     }
2357 }
2358
2359 - (void)removeSuperviewObservers
2360 {
2361     NSView *superview = [self superview];
2362     if (superview && [self window]) {
2363         [[NSNotificationCenter defaultCenter] removeObserver:self
2364             name:NSViewFrameDidChangeNotification object:superview];
2365         [[NSNotificationCenter defaultCenter] removeObserver:self
2366             name:NSViewBoundsDidChangeNotification object:superview];
2367     }
2368 }
2369
2370 - (void)addWindowObservers
2371 {
2372     NSWindow *window = [self window];
2373     if (window) {
2374         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidBecomeKey:)
2375             name:NSWindowDidBecomeKeyNotification object:nil];
2376         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidResignKey:)
2377             name:NSWindowDidResignKeyNotification object:nil];
2378         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowWillClose:)
2379             name:NSWindowWillCloseNotification object:window];
2380     }
2381 }
2382
2383 - (void)removeWindowObservers
2384 {
2385     NSWindow *window = [self window];
2386     if (window) {
2387         [[NSNotificationCenter defaultCenter] removeObserver:self
2388             name:NSWindowDidBecomeKeyNotification object:nil];
2389         [[NSNotificationCenter defaultCenter] removeObserver:self
2390             name:NSWindowDidResignKeyNotification object:nil];
2391         [[NSNotificationCenter defaultCenter] removeObserver:self
2392             name:NSWindowWillCloseNotification object:window];
2393     }
2394 }
2395
2396 - (void)viewWillMoveToSuperview:(NSView *)newSuperview
2397 {
2398     [self removeSuperviewObservers];
2399 }
2400
2401 - (void)viewDidMoveToSuperview
2402 {
2403     // Do this here in case the text size multiplier changed when a non-HTML
2404     // view was installed.
2405     if ([self superview] != nil) {
2406         [self _updateTextSizeMultiplier];
2407         [self addSuperviewObservers];
2408     }
2409 }
2410
2411 - (void)viewWillMoveToWindow:(NSWindow *)window
2412 {
2413     // Don't do anything if we aren't initialized.  This happens
2414     // when decoding a WebView.  When WebViews are decoded their subviews
2415     // are created by initWithCoder: and so won't be normally
2416     // initialized.  The stub views are discarded by WebView.
2417     if (_private) {
2418         // FIXME: Some of these calls may not work because this view may be already removed from it's superview.
2419         [self removeMouseMovedObserver];
2420         [self removeWindowObservers];
2421         [self removeSuperviewObservers];
2422         [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(_updateMouseoverWithFakeEvent) object:nil];
2423
2424         [[self _pluginController] stopAllPlugins];
2425     }
2426 }
2427
2428 - (void)viewDidMoveToWindow
2429 {
2430     // Don't do anything if we aren't initialized.  This happens
2431     // when decoding a WebView.  When WebViews are decoded their subviews
2432     // are created by initWithCoder: and so won't be normally
2433     // initialized.  The stub views are discarded by WebView.
2434     if (_private) {
2435         [self _stopAutoscrollTimer];
2436         if ([self window]) {
2437             _private->lastScrollPosition = [[self superview] bounds].origin;
2438             [self addWindowObservers];
2439             [self addSuperviewObservers];
2440             [self addMouseMovedObserver];
2441
2442             // Schedule this update, rather than making the call right now.
2443             // The reason is that placing the caret in the just-installed view requires
2444             // the HTML/XML document to be available on the WebCore side, but it is not
2445             // at the time this code is running. However, it will be there on the next
2446             // crank of the run loop. Doing this helps to make a blinking caret appear
2447             // in a new, empty window "automatic".
2448             [self performSelector:@selector(_updateActiveState) withObject:nil afterDelay:0];
2449
2450             [[self _pluginController] startAllPlugins];
2451
2452             _private->lastScrollPosition = NSZeroPoint;
2453         }
2454     }
2455 }
2456
2457 - (void)viewWillMoveToHostWindow:(NSWindow *)hostWindow
2458 {
2459     [[self subviews] _web_makePluginViewsPerformSelector:@selector(viewWillMoveToHostWindow:) withObject:hostWindow];
2460 }
2461
2462 - (void)viewDidMoveToHostWindow
2463 {
2464     [[self subviews] _web_makePluginViewsPerformSelector:@selector(viewDidMoveToHostWindow) withObject:nil];
2465 }
2466
2467
2468 - (void)addSubview:(NSView *)view
2469 {
2470     [super addSubview:view];
2471
2472     if ([WebPluginController isPlugInView:view]) {
2473         [[self _pluginController] addPlugin:view];
2474     }
2475 }
2476
2477 - (void)willRemoveSubview:(NSView *)subview
2478 {
2479     if ([WebPluginController isPlugInView:subview])
2480         [[self _pluginController] destroyPlugin:subview];
2481     [super willRemoveSubview:subview];
2482 }
2483
2484 - (void)reapplyStyles
2485 {
2486     if (!_private->needsToApplyStyles) {
2487         return;
2488     }
2489
2490 #ifdef _KWQ_TIMING
2491     double start = CFAbsoluteTimeGetCurrent();
2492 #endif
2493
2494     [[self _bridge] reapplyStylesForDeviceType:
2495         _private->printing ? WebCoreDevicePrinter : WebCoreDeviceScreen];
2496
2497 #ifdef _KWQ_TIMING
2498     double thisTime = CFAbsoluteTimeGetCurrent() - start;
2499     LOG(Timing, "%s apply style seconds = %f", [self URL], thisTime);
2500 #endif
2501
2502     _private->needsToApplyStyles = NO;
2503 }
2504
2505 // Do a layout, but set up a new fixed width for the purposes of doing printing layout.
2506 // minPageWidth==0 implies a non-printing layout
2507 - (void)layoutToMinimumPageWidth:(float)minPageWidth maximumPageWidth:(float)maxPageWidth adjustingViewSize:(BOOL)adjustViewSize
2508 {
2509     [self reapplyStyles];
2510
2511     // Ensure that we will receive mouse move events.  Is this the best place to put this?
2512     [[self window] setAcceptsMouseMovedEvents: YES];
2513     WKSetNSWindowShouldPostEventNotifications([self window], YES);
2514
2515     if (!_private->needsLayout) {
2516         return;
2517     }
2518
2519 #ifdef _KWQ_TIMING
2520     double start = CFAbsoluteTimeGetCurrent();
2521 #endif
2522
2523     LOG(View, "%@ doing layout", self);
2524
2525     if (minPageWidth > 0.0) {
2526         [[self _bridge] forceLayoutWithMinimumPageWidth:minPageWidth maximumPageWidth:maxPageWidth adjustingViewSize:adjustViewSize];
2527     } else {
2528         [[self _bridge] forceLayoutAdjustingViewSize:adjustViewSize];
2529     }
2530     _private->needsLayout = NO;
2531
2532     if (!_private->printing) {
2533         // get size of the containing dynamic scrollview, so
2534         // appearance and disappearance of scrollbars will not show up
2535         // as a size change
2536         NSSize newLayoutFrameSize = [[[self superview] superview] frame].size;
2537         if (_private->laidOutAtLeastOnce && !NSEqualSizes(_private->lastLayoutFrameSize, newLayoutFrameSize)) {
2538             [[self _bridge] sendResizeEvent];
2539             if ([[self _bridge] needsLayout])
2540                 [[self _bridge] forceLayoutAdjustingViewSize:NO];
2541         }
2542         _private->laidOutAtLeastOnce = YES;
2543         _private->lastLayoutSize = [(NSClipView *)[self superview] documentVisibleRect].size;
2544         _private->lastLayoutFrameSize = newLayoutFrameSize;
2545     }
2546
2547 #ifdef _KWQ_TIMING
2548     double thisTime = CFAbsoluteTimeGetCurrent() - start;
2549     LOG(Timing, "%s layout seconds = %f", [self URL], thisTime);
2550 #endif
2551 }
2552
2553 - (void)layout
2554 {
2555     [self layoutToMinimumPageWidth:0.0f maximumPageWidth:0.0f adjustingViewSize:NO];
2556 }
2557
2558 - (NSMenu *)menuForEvent:(NSEvent *)event
2559 {
2560     [_private->compController endRevertingChange:NO moveLeft:NO];
2561
2562     _private->handlingMouseDownEvent = YES;
2563     BOOL handledEvent = [[self _bridge] sendContextMenuEvent:event];
2564     _private->handlingMouseDownEvent = NO;
2565     if (handledEvent)
2566         return nil;
2567
2568     NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
2569     NSDictionary *element = [self elementAtPoint:point];
2570     return [[self _webView] _menuForElement:element defaultItems:nil];
2571 }
2572
2573 - (BOOL)searchFor:(NSString *)string direction:(BOOL)forward caseSensitive:(BOOL)caseFlag wrap:(BOOL)wrapFlag
2574 {
2575     if (![string length])
2576         return NO;
2577
2578     return [[self _bridge] searchFor:string direction:forward caseSensitive:caseFlag wrap:wrapFlag];
2579 }
2580
2581 - (void)deselectText
2582 {
2583     [[self _bridge] deselectText];
2584 }
2585
2586 - (BOOL)isOpaque
2587 {
2588     return [[self _webView] drawsBackground];
2589 }
2590
2591 - (void)setNeedsDisplay:(BOOL)flag
2592 {
2593     LOG(View, "%@ flag = %d", self, (int)flag);
2594     [super setNeedsDisplay: flag];
2595 }
2596
2597 - (void)setNeedsLayout: (BOOL)flag
2598 {
2599     LOG(View, "%@ flag = %d", self, (int)flag);
2600     _private->needsLayout = flag;
2601 }
2602
2603
2604 - (void)setNeedsToApplyStyles: (BOOL)flag
2605 {
2606     LOG(View, "%@ flag = %d", self, (int)flag);
2607     _private->needsToApplyStyles = flag;
2608 }
2609
2610 - (void)drawSingleRect:(NSRect)rect
2611 {
2612     [NSGraphicsContext saveGraphicsState];
2613     NSRectClip(rect);
2614
2615     ASSERT([[self superview] isKindOfClass:[WebClipView class]]);
2616
2617     [(WebClipView *)[self superview] setAdditionalClip:rect];
2618
2619     NS_DURING {
2620         if ([self _transparentBackground]) {
2621             [[NSColor clearColor] set];
2622             NSRectFill (rect);
2623         }
2624
2625         [[self _bridge] drawRect:rect];
2626         WebView *webView = [self _webView];
2627         [[webView _UIDelegateForwarder] webView:webView didDrawRect:[webView convertRect:rect fromView:self]];
2628         [(WebClipView *)[self superview] resetAdditionalClip];
2629
2630         [NSGraphicsContext restoreGraphicsState];
2631     } NS_HANDLER {
2632         [(WebClipView *)[self superview] resetAdditionalClip];
2633         [NSGraphicsContext restoreGraphicsState];
2634         LOG_ERROR("Exception caught while drawing: %@", localException);
2635         [localException raise];
2636     } NS_ENDHANDLER
2637 }
2638
2639 - (void)drawRect:(NSRect)rect
2640 {
2641     LOG(View, "%@ drawing", self);
2642
2643     const NSRect *rects;
2644     WebNSInteger count;
2645     [self getRectsBeingDrawn:&rects count:&count];
2646
2647     BOOL subviewsWereSetAside = _private->subviewsSetAside;
2648     if (subviewsWereSetAside)
2649         [self _restoreSubviews];
2650
2651 #ifdef _KWQ_TIMING
2652     double start = CFAbsoluteTimeGetCurrent();
2653 #endif
2654
2655     // If count == 0 here, use the rect passed in for drawing. This is a workaround for:
2656     // <rdar://problem/3908282> REGRESSION (Mail): No drag image dragging selected text in Blot and Mail
2657     // The reason for the workaround is that this method is called explicitly from the code
2658     // to generate a drag image, and at that time, getRectsBeingDrawn:count: will return a zero count.
2659     const int cRectThreshold = 10;
2660     const float cWastedSpaceThreshold = 0.75f;
2661     BOOL useUnionedRect = (count <= 1) || (count > cRectThreshold);
2662     if (!useUnionedRect) {
2663         // Attempt to guess whether or not we should use the unioned rect or the individual rects.
2664         // We do this by computing the percentage of "wasted space" in the union.  If that wasted space
2665         // is too large, then we will do individual rect painting instead.
2666         float unionPixels = (rect.size.width * rect.size.height);
2667         float singlePixels = 0;
2668         for (int i = 0; i < count; ++i)
2669             singlePixels += rects[i].size.width * rects[i].size.height;
2670         float wastedSpace = 1 - (singlePixels / unionPixels);
2671         if (wastedSpace <= cWastedSpaceThreshold)
2672             useUnionedRect = YES;
2673     }
2674
2675     if (useUnionedRect)
2676         [self drawSingleRect:rect];
2677     else
2678         for (int i = 0; i < count; ++i)
2679             [self drawSingleRect:rects[i]];
2680
2681 #ifdef _KWQ_TIMING
2682     double thisTime = CFAbsoluteTimeGetCurrent() - start;
2683     LOG(Timing, "%s draw seconds = %f", widget->part()->baseURL().URL().latin1(), thisTime);
2684 #endif
2685
2686     if (subviewsWereSetAside)
2687         [self _setAsideSubviews];
2688 }
2689
2690 // Turn off the additional clip while computing our visibleRect.
2691 - (NSRect)visibleRect
2692 {
2693     if (!([[self superview] isKindOfClass:[WebClipView class]]))
2694         return [super visibleRect];
2695
2696     WebClipView *clipView = (WebClipView *)[self superview];
2697
2698     BOOL hasAdditionalClip = [clipView hasAdditionalClip];
2699     if (!hasAdditionalClip) {
2700         return [super visibleRect];
2701     }
2702
2703     NSRect additionalClip = [clipView additionalClip];
2704     [clipView resetAdditionalClip];
2705     NSRect visibleRect = [super visibleRect];
2706     [clipView setAdditionalClip:additionalClip];
2707     return visibleRect;
2708 }
2709
2710 - (BOOL)isFlipped
2711 {
2712     return YES;
2713 }
2714
2715 - (void)windowDidBecomeKey:(NSNotification *)notification
2716 {
2717     NSWindow *keyWindow = [notification object];
2718
2719     if (keyWindow == [self window])
2720         [self addMouseMovedObserver];
2721
2722     if (keyWindow == [self window] || keyWindow == [[self window] attachedSheet])
2723         [self _updateActiveState];
2724 }
2725
2726 - (void)windowDidResignKey:(NSNotification *)notification
2727 {
2728     NSWindow *formerKeyWindow = [notification object];
2729
2730     if (formerKeyWindow == [self window])
2731         [self removeMouseMovedObserver];
2732
2733     if (formerKeyWindow == [self window] || formerKeyWindow == [[self window] attachedSheet]) {
2734         [self _updateActiveState];
2735         [_private->compController endRevertingChange:NO moveLeft:NO];
2736     }
2737 }
2738
2739 - (void)windowWillClose:(NSNotification *)notification
2740 {
2741     [_private->compController endRevertingChange:NO moveLeft:NO];
2742     [[self _pluginController] destroyAllPlugins];
2743 }
2744
2745 - (void)scrollWheel:(NSEvent *)event
2746 {
2747     [self retain];
2748
2749     if (![[self _bridge] sendScrollWheelEvent:event]) {
2750         [[self nextResponder] scrollWheel:event];
2751     }
2752
2753     [self release];
2754 }
2755
2756 - (BOOL)_isSelectionEvent:(NSEvent *)event
2757 {
2758     NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
2759     return [[[self elementAtPoint:point allowShadowContent:YES] objectForKey:WebElementIsSelectedKey] boolValue];
2760 }
2761
2762 - (BOOL)acceptsFirstMouse:(NSEvent *)event
2763 {
2764     NSView *hitView = [self _hitViewForEvent:event];
2765     WebHTMLView *hitHTMLView = [hitView isKindOfClass:[self class]] ? (WebHTMLView *)hitView : nil;
2766
2767     if ([[self _webView] _dashboardBehavior:WebDashboardBehaviorAlwaysAcceptsFirstMouse])
2768         return YES;
2769
2770     if (hitHTMLView != nil) {
2771         [hitHTMLView _setMouseDownEvent:event];
2772         [[hitHTMLView _bridge] setActivationEventNumber:[event eventNumber]];
2773         BOOL result = [hitHTMLView _isSelectionEvent:event] ? [[hitHTMLView _bridge] eventMayStartDrag:event] : NO;
2774         [hitHTMLView _setMouseDownEvent:nil];
2775         return result;
2776     } else
2777         return [hitView acceptsFirstMouse:event];
2778 }
2779
2780 - (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)event
2781 {
2782     NSView *hitView = [self _hitViewForEvent:event];
2783     WebHTMLView *hitHTMLView = [hitView isKindOfClass:[self class]] ? (WebHTMLView *)hitView : nil;
2784     if (hitHTMLView != nil) {
2785         [hitHTMLView _setMouseDownEvent:event];
2786         BOOL result = [hitHTMLView _isSelectionEvent:event] ? [[hitHTMLView _bridge] eventMayStartDrag:event] : NO;
2787         [hitHTMLView _setMouseDownEvent:nil];
2788         return result;
2789     } else
2790         return [hitView shouldDelayWindowOrderingForEvent:event];
2791 }
2792
2793 - (void)mouseDown:(NSEvent *)event
2794 {
2795     [self retain];
2796
2797     _private->handlingMouseDownEvent = YES;
2798
2799     // Record the mouse down position so we can determine drag hysteresis.
2800     [self _setMouseDownEvent:event];
2801
2802     NSInputManager *currentInputManager = [NSInputManager currentInputManager];
2803     if ([currentInputManager wantsToHandleMouseEvents] && [currentInputManager handleMouseEvent:event])
2804         goto done;
2805
2806     [_private->compController endRevertingChange:NO moveLeft:NO];
2807
2808     // If the web page handles the context menu event and menuForEvent: returns nil, we'll get control click events here.
2809     // We don't want to pass them along to KHTML a second time.
2810     if (!([event modifierFlags] & NSControlKeyMask)) {
2811         _private->ignoringMouseDraggedEvents = NO;
2812
2813         // Don't do any mouseover while the mouse is down.
2814         [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(_updateMouseoverWithFakeEvent) object:nil];
2815
2816         // Let KHTML get a chance to deal with the event. This will call back to us
2817         // to start the autoscroll timer if appropriate.
2818         [[self _bridge] mouseDown:event];
2819     }
2820
2821 done:
2822     [_private->firstResponderTextViewAtMouseDownTime release];
2823     _private->firstResponderTextViewAtMouseDownTime = nil;
2824
2825     _private->handlingMouseDownEvent = NO;
2826
2827     [self release];
2828 }
2829
2830 - (void)dragImage:(NSImage *)dragImage
2831                at:(NSPoint)at
2832            offset:(NSSize)offset
2833             event:(NSEvent *)event
2834        pasteboard:(NSPasteboard *)pasteboard
2835            source:(id)source
2836         slideBack:(BOOL)slideBack
2837 {
2838     [self _stopAutoscrollTimer];
2839
2840     WebHTMLView *topHTMLView = [self _topHTMLView];
2841     if (self != topHTMLView) {
2842         [topHTMLView dragImage:dragImage at:[self convertPoint:at toView:topHTMLView]
2843             offset:offset event:event pasteboard:pasteboard source:source slideBack:slideBack];
2844         return;
2845     }
2846
2847     WebView *webView = [self _webView];
2848
2849     [webView _setInitiatedDrag:YES];
2850
2851     // Retain this view during the drag because it may be released before the drag ends.
2852     [self retain];
2853
2854     id UIDelegate = [webView UIDelegate];
2855     // If a delegate takes over the drag but never calls draggedImage: endedAt:, we'll leak the WebHTMLView.
2856     if ([UIDelegate respondsToSelector:@selector(webView:dragImage:at:offset:event:pasteboard:source:slideBack:forView:)])
2857         [UIDelegate webView:webView dragImage:dragImage at:at offset:offset event:event pasteboard:pasteboard source:source slideBack:slideBack forView:self];
2858     else
2859         [super dragImage:dragImage at:at offset:offset event:event pasteboard:pasteboard source:source slideBack:slideBack];
2860 }
2861
2862 - (void)mouseDragged:(NSEvent *)event
2863 {
2864     NSInputManager *currentInputManager = [NSInputManager currentInputManager];
2865     if ([currentInputManager wantsToHandleMouseEvents] && [currentInputManager handleMouseEvent:event])
2866         return;
2867
2868     [self retain];
2869
2870     if (!_private->ignoringMouseDraggedEvents)
2871         [[self _bridge] mouseDragged:event];
2872
2873     [self release];
2874 }
2875
2876 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal
2877 {
2878     ASSERT([self _isTopHTMLView]);
2879
2880     if (_private->webCoreDragOp == NSDragOperationNone)
2881         return NSDragOperationGeneric | NSDragOperationCopy;
2882     return _private->webCoreDragOp;
2883 }
2884
2885 - (void)draggedImage:(NSImage *)image movedTo:(NSPoint)screenLoc
2886 {
2887     ASSERT([self _isTopHTMLView]);
2888
2889     NSPoint windowImageLoc = [[self window] convertScreenToBase:screenLoc];
2890     NSPoint windowMouseLoc = NSMakePoint(windowImageLoc.x + _private->dragOffset.x, windowImageLoc.y + _private->dragOffset.y);
2891     [[self _bridge] dragSourceMovedTo:windowMouseLoc];
2892 }
2893
2894 - (void)draggedImage:(NSImage *)anImage endedAt:(NSPoint)aPoint operation:(NSDragOperation)operation
2895 {
2896     ASSERT(![self _webView] || [self _isTopHTMLView]);
2897
2898     NSPoint windowImageLoc = [[self window] convertScreenToBase:aPoint];
2899     NSPoint windowMouseLoc = NSMakePoint(windowImageLoc.x + _private->dragOffset.x, windowImageLoc.y + _private->dragOffset.y);
2900     [[self _bridge] dragSourceEndedAt:windowMouseLoc operation:operation];
2901
2902     _private->initiatedDrag = NO;
2903     [[self _webView] _setInitiatedDrag:NO];
2904
2905     // Prevent queued mouseDragged events from coming after the drag and fake mouseUp event.
2906     _private->ignoringMouseDraggedEvents = YES;
2907
2908     // Once the dragging machinery kicks in, we no longer get mouse drags or the up event.
2909     // WebCore expects to get balanced down/up's, so we must fake up a mouseup.
2910     NSEvent *fakeEvent = [NSEvent mouseEventWithType:NSLeftMouseUp
2911                                             location:windowMouseLoc
2912                                        modifierFlags:[[NSApp currentEvent] modifierFlags]
2913                                            timestamp:[NSDate timeIntervalSinceReferenceDate]
2914                                         windowNumber:[[self window] windowNumber]
2915                                              context:[[NSApp currentEvent] context]
2916                                          eventNumber:0 clickCount:0 pressure:0];
2917     [self mouseUp:fakeEvent]; // This will also update the mouseover state.
2918
2919     // Balance the previous retain from when the drag started.
2920     [self release];
2921 }
2922
2923 - (NSArray *)namesOfPromisedFilesDroppedAtDestination:(NSURL *)dropDestination
2924 {
2925     ASSERT([self _isTopHTMLView]);
2926     ASSERT(_private->draggingImageURL);
2927
2928     NSFileWrapper *wrapper = [[self _dataSource] _fileWrapperForURL:_private->draggingImageURL];
2929     if (wrapper == nil) {
2930         LOG_ERROR("Failed to create image file. Did the source image change while dragging? (<rdar://problem/4244861>)");
2931         return nil;
2932     }
2933
2934     // FIXME: Report an error if we fail to create a file.
2935     NSString *path = [[dropDestination path] stringByAppendingPathComponent:[wrapper preferredFilename]];
2936     path = [[NSFileManager defaultManager] _webkit_pathWithUniqueFilenameForPath:path];
2937     if (![wrapper writeToFile:path atomically:NO updateFilenames:YES])
2938         LOG_ERROR("Failed to create image file via -[NSFileWrapper writeToFile:atomically:updateFilenames:]");
2939
2940     return [NSArray arrayWithObject:[path lastPathComponent]];
2941 }
2942
2943 - (void)mouseUp:(NSEvent *)event
2944 {
2945     [self _setMouseDownEvent:nil];
2946
2947     NSInputManager *currentInputManager = [NSInputManager currentInputManager];
2948     if ([currentInputManager wantsToHandleMouseEvents] && [currentInputManager handleMouseEvent:event])
2949         return;
2950
2951     [self retain];
2952
2953     [self _stopAutoscrollTimer];
2954     [[self _bridge] mouseUp:event];
2955     [self _updateMouseoverWithFakeEvent];
2956
2957     [self release];
2958 }
2959
2960 - (void)mouseMovedNotification:(NSNotification *)notification
2961 {
2962     [self _updateMouseoverWithEvent:[[notification userInfo] objectForKey:@"NSEvent"]];
2963 }
2964
2965 // returning YES from this method is the way we tell AppKit that it is ok for this view
2966 // to be in the key loop even when "tab to all controls" is not on.
2967 - (BOOL)needsPanelToBecomeKey
2968 {
2969     return YES;
2970 }
2971
2972 - (NSView *)nextValidKeyView
2973 {
2974     NSView *view = nil;
2975     BOOL lookInsideWebFrameViews = YES;
2976     if ([self isHiddenOrHasHiddenAncestor]) {
2977         lookInsideWebFrameViews = NO;
2978     } else if ([self _frame] == [[self _webView] mainFrame]) {
2979         // Check for case where first responder is last frame in a frameset, and we are
2980         // the top-level documentView.
2981         NSResponder *firstResponder = [[self window] firstResponder];
2982         if ((firstResponder != self) && [firstResponder isKindOfClass:[WebHTMLView class]] && ([(NSView *)firstResponder nextKeyView] == nil)) {
2983             lookInsideWebFrameViews = NO;
2984         }
2985     }
2986
2987     if (lookInsideWebFrameViews) {
2988         view = [[self _bridge] nextKeyViewInsideWebFrameViews];
2989     }
2990
2991     if (view == nil) {
2992         view = [super nextValidKeyView];
2993         // If there's no next view wired up, we must be in the last subframe, or we are
2994         // being called at an unusual time when the views have not yet been wired together.
2995         // There's no direct link to the next valid key view; get it from the bridge.
2996         // Note that view == self here when nextKeyView returns nil, due to AppKit oddness.
2997         // We'll check for both nil and self in case the AppKit oddness goes away.
2998         // WebFrameView has this same kind of logic for the previousValidKeyView case.
2999         if (view == nil || view == self) {
3000             view = [[self _bridge] nextValidKeyViewOutsideWebFrameViews];
3001         }
3002     }
3003
3004     return view;
3005 }
3006
3007 - (NSView *)previousValidKeyView
3008 {
3009     NSView *view = nil;
3010     if (![self isHiddenOrHasHiddenAncestor])
3011         view = [[self _bridge] previousKeyViewInsideWebFrameViews];
3012     if (view == nil)
3013         view = [super previousValidKeyView];
3014     return view;
3015 }
3016
3017 - (BOOL)becomeFirstResponder
3018 {
3019     NSView *view = nil;
3020     if (![[self _webView] _isPerformingProgrammaticFocus] && !_private->willBecomeFirstResponderForNodeFocus) {
3021         switch ([[self window] keyViewSelectionDirection]) {
3022             case NSDirectSelection:
3023                 break;
3024             case NSSelectingNext:
3025                 view = [[self _bridge] nextKeyViewInsideWebFrameViews];
3026                 break;
3027             case NSSelectingPrevious:
3028                 view = [[self _bridge] previousKeyViewInsideWebFrameViews];
3029                 break;
3030         }
3031     }
3032     _private->willBecomeFirstResponderForNodeFocus = NO;
3033     if (view)
3034         [[self window] makeFirstResponder:view];
3035     [self _updateActiveState];
3036     [self _updateFontPanel];
3037     _private->startNewKillRingSequence = YES;
3038     return YES;
3039 }
3040
3041 - (BOOL)resignFirstResponder
3042 {
3043     BOOL resign = [super resignFirstResponder];
3044     if (resign) {
3045         [_private->compController endRevertingChange:NO moveLeft:NO];
3046         _private->resigningFirstResponder = YES;
3047         if (![self maintainsInactiveSelection]) {
3048             if ([[self _webView] _isPerformingProgrammaticFocus])
3049                 [self deselectText];
3050             else
3051                 [self deselectAll];
3052         }
3053         [self _updateActiveState];
3054         _private->resigningFirstResponder = NO;
3055         _private->willBecomeFirstResponderForNodeFocus = NO;
3056     }
3057     return resign;
3058 }
3059
3060 - (void)setDataSource:(WebDataSource *)dataSource
3061 {
3062     ASSERT(!_private->dataSource);
3063     _private->dataSource = [dataSource retain];
3064     [_private->pluginController setDataSource:dataSource];
3065     [self addMouseMovedObserver];
3066 }
3067
3068 - (void)dataSourceUpdated:(WebDataSource *)dataSource
3069 {
3070 }
3071
3072 // This is an override of an NSControl method that wants to repaint the entire view when the window resigns/becomes
3073 // key.  WebHTMLView is an NSControl only because it hosts NSCells that are painted by WebCore's Aqua theme
3074 // renderer (and those cells must be hosted by an enclosing NSControl in order to paint properly).
3075 - (void)updateCell:(NSCell*)cell
3076 {
3077 }
3078
3079 // Does setNeedsDisplay:NO as a side effect when printing is ending.
3080 // pageWidth != 0 implies we will relayout to a new width
3081 - (void)_setPrinting:(BOOL)printing minimumPageWidth:(float)minPageWidth maximumPageWidth:(float)maxPageWidth adjustViewSize:(BOOL)adjustViewSize
3082 {
3083     WebFrame *frame = [self _frame];
3084     NSArray *subframes = [frame childFrames];
3085     unsigned n = [subframes count];
3086     unsigned i;
3087     for (i = 0; i != n; ++i) {
3088         WebFrame *subframe = [subframes objectAtIndex:i];
3089         WebFrameView *frameView = [subframe frameView];
3090         if ([[subframe dataSource] _isDocumentHTML]) {
3091             [(WebHTMLView *)[frameView documentView] _setPrinting:printing minimumPageWidth:0.0f maximumPageWidth:0.0f adjustViewSize:adjustViewSize];
3092         }
3093     }
3094
3095     if (printing != _private->printing) {
3096         [_private->pageRects release];
3097         _private->pageRects = nil;
3098         _private->printing = printing;
3099         [self setNeedsToApplyStyles:YES];
3100         [self setNeedsLayout:YES];
3101         [self layoutToMinimumPageWidth:minPageWidth maximumPageWidth:maxPageWidth adjustingViewSize:adjustViewSize];
3102         if (!printing) {
3103             // Can't do this when starting printing or nested printing won't work, see 3491427.
3104             [self setNeedsDisplay:NO];
3105         }
3106     }
3107 }
3108
3109 - (BOOL)canPrintHeadersAndFooters
3110 {
3111     return YES;
3112 }
3113
3114 // This is needed for the case where the webview is embedded in the view that's being printed.
3115 // It shouldn't be called when the webview is being printed directly.
3116 - (void)adjustPageHeightNew:(float *)newBottom top:(float)oldTop bottom:(float)oldBottom limit:(float)bottomLimit
3117 {
3118     // This helps when we print as part of a larger print process.
3119     // If the WebHTMLView itself is what we're printing, then we will never have to do this.
3120     BOOL wasInPrintingMode = _private->printing;
3121     if (!wasInPrintingMode)
3122         [self _setPrinting:YES minimumPageWidth:0.0f maximumPageWidth:0.0f adjustViewSize:NO];
3123
3124     [[self _bridge] adjustPageHeightNew:newBottom top:oldTop bottom:oldBottom limit:bottomLimit];
3125
3126     if (!wasInPrintingMode)
3127         [self _setPrinting:NO minimumPageWidth:0.0f maximumPageWidth:0.0f adjustViewSize:NO];
3128 }
3129
3130 - (float)_availablePaperWidthForPrintOperation:(NSPrintOperation *)printOperation
3131 {
3132     NSPrintInfo *printInfo = [printOperation printInfo];
3133     return [printInfo paperSize].width - [printInfo leftMargin] - [printInfo rightMargin];
3134 }
3135
3136 - (float)_scaleFactorForPrintOperation:(NSPrintOperation *)printOperation
3137 {
3138     float viewWidth = NSWidth([self bounds]);
3139     if (viewWidth < 1) {
3140         LOG_ERROR("%@ has no width when printing", self);
3141         return 1.0f;
3142     }
3143
3144     float userScaleFactor = [printOperation _web_pageSetupScaleFactor];
3145     float maxShrinkToFitScaleFactor = 1.0f / PrintingMaximumShrinkFactor;
3146     float shrinkToFitScaleFactor = [self _availablePaperWidthForPrintOperation:printOperation]/viewWidth;
3147     return userScaleFactor * MAX(maxShrinkToFitScaleFactor, shrinkToFitScaleFactor);
3148 }
3149
3150 // FIXME 3491344: This is a secret AppKit-internal method that we need to override in order
3151 // to get our shrink-to-fit to work with a custom pagination scheme. We can do this better
3152 // if AppKit makes it SPI/API.
3153 - (float)_provideTotalScaleFactorForPrintOperation:(NSPrintOperation *)printOperation
3154 {
3155     return [self _scaleFactorForPrintOperation:printOperation];
3156 }
3157
3158 // This is used for Carbon printing. At some point we might want to make this public API.
3159 - (void)setPageWidthForPrinting:(float)pageWidth
3160 {
3161     [self _setPrinting:NO minimumPageWidth:0.0f maximumPageWidth:0.0f adjustViewSize:NO];
3162     [self _setPrinting:YES minimumPageWidth:pageWidth maximumPageWidth:pageWidth adjustViewSize:YES];
3163 }
3164
3165 - (void)_endPrintMode
3166 {
3167     [self _setPrinting:NO minimumPageWidth:0.0f maximumPageWidth:0.0f adjustViewSize:YES];
3168     [[self window] setAutodisplay:YES];
3169 }
3170
3171 - (void)_delayedEndPrintMode:(NSPrintOperation *)initiatingOperation
3172 {
3173     ASSERT_ARG(initiatingOperation, initiatingOperation != nil);
3174     NSPrintOperation *currentOperation = [NSPrintOperation currentOperation];
3175     if (initiatingOperation == currentOperation) {
3176         // The print operation is still underway. We don't expect this to ever happen, hence the assert, but we're
3177         // being extra paranoid here since the printing code is so fragile. Delay the cleanup
3178         // further.
3179         ASSERT_NOT_REACHED();
3180         [self performSelector:@selector(_delayedEndPrintMode:) withObject:initiatingOperation afterDelay:0];
3181     } else if ([currentOperation view] == self) {
3182         // A new print job has started, but it is printing the same WebHTMLView again. We don't expect
3183         // this to ever happen, hence the assert, but we're being extra paranoid here since the printing code is so
3184         // fragile. Do nothing, because we don't want to break the print job currently in progress, and
3185         // the print job currently in progress is responsible for its own cleanup.
3186         ASSERT_NOT_REACHED();
3187     } else {
3188         // The print job that kicked off this delayed call has finished, and this view is not being
3189         // printed again. We expect that no other print job has started. Since this delayed call wasn't
3190         // cancelled, beginDocument and endDocument must not have been called, and we need to clean up
3191         // the print mode here.
3192         ASSERT(currentOperation == nil);
3193         [self _endPrintMode];
3194     }
3195 }
3196
3197 // Return the number of pages available for printing
3198 - (BOOL)knowsPageRange:(NSRangePointer)range
3199 {
3200     // Must do this explicit display here, because otherwise the view might redisplay while the print
3201     // sheet was up, using printer fonts (and looking different).
3202     [self displayIfNeeded];
3203     [[self window] setAutodisplay:NO];
3204
3205     // If we are a frameset just print with the layout we have onscreen, otherwise relayout
3206     // according to the paper size
3207     float minLayoutWidth = 0.0f;
3208     float maxLayoutWidth = 0.0f;
3209     if (![[self _bridge] isFrameSet]) {
3210         float paperWidth = [self _availablePaperWidthForPrintOperation:[NSPrintOperation currentOperation]];
3211         minLayoutWidth = paperWidth * PrintingMinimumShrinkFactor;
3212         maxLayoutWidth = paperWidth * PrintingMaximumShrinkFactor;
3213     }
3214     [self _setPrinting:YES minimumPageWidth:minLayoutWidth maximumPageWidth:maxLayoutWidth adjustViewSize:YES]; // will relayout
3215     NSPrintOperation *printOperation = [NSPrintOperation currentOperation];
3216     // Certain types of errors, including invalid page ranges, can cause beginDocument and
3217     // endDocument to be skipped after we've put ourselves in print mode (see 4145905). In those cases
3218     // we need to get out of print mode without relying on any more callbacks from the printing mechanism.
3219     // If we get as far as beginDocument without trouble, then this delayed request will be cancelled.
3220     // If not cancelled, this delayed call will be invoked in the next pass through the main event loop,
3221     // which is after beginDocument and endDocument would be called.
3222     [self performSelector:@selector(_delayedEndPrintMode:) withObject:printOperation afterDelay:0];
3223     [[self _webView] _adjustPrintingMarginsForHeaderAndFooter];
3224
3225     // There is a theoretical chance that someone could do some drawing between here and endDocument,
3226     // if something caused setNeedsDisplay after this point. If so, it's not a big tragedy, because
3227     // you'd simply see the printer fonts on screen. As of this writing, this does not happen with Safari.
3228
3229     range->location = 1;
3230     float totalScaleFactor = [self _scaleFactorForPrintOperation:printOperation];
3231     float userScaleFactor = [printOperation _web_pageSetupScaleFactor];
3232     [_private->pageRects release];
3233     float fullPageHeight = floorf([self _calculatePrintHeight]/totalScaleFactor);
3234     NSArray *newPageRects = [[self _bridge] computePageRectsWithPrintWidthScaleFactor:userScaleFactor
3235                                                                           printHeight:fullPageHeight];
3236
3237     // AppKit gets all messed up if you give it a zero-length page count (see 3576334), so if we
3238     // hit that case we'll pass along a degenerate 1 pixel square to print. This will print
3239     // a blank page (with correct-looking header and footer if that option is on), which matches
3240     // the behavior of IE and Camino at least.
3241     if ([newPageRects count] == 0)
3242         newPageRects = [NSArray arrayWithObject:[NSValue valueWithRect:NSMakeRect(0, 0, 1, 1)]];
3243     else if ([newPageRects count] > 1) {
3244         // If the last page is a short orphan, try adjusting the print height slightly to see if this will squeeze the
3245         // content onto one fewer page. If it does, use the adjusted scale. If not, use the original scale.
3246         float lastPageHeight = NSHeight([[newPageRects lastObject] rectValue]);
3247         if (lastPageHeight/fullPageHeight < LastPrintedPageOrphanRatio) {
3248             NSArray *adjustedPageRects = [[self _bridge] computePageRectsWithPrintWidthScaleFactor:userScaleFactor
3249                                                                                        printHeight:fullPageHeight*PrintingOrphanShrinkAdjustment];
3250             // Use the adjusted rects only if the page count went down
3251             if ([adjustedPageRects count] < [newPageRects count])
3252                 newPageRects = adjustedPageRects;
3253         }
3254     }
3255
3256     _private->pageRects = [newPageRects retain];
3257
3258     range->length = [_private->pageRects count];
3259
3260     return YES;
3261 }
3262
3263 // Return the drawing rectangle for a particular page number
3264 - (NSRect)rectForPage:(int)page
3265 {
3266     return [[_private->pageRects objectAtIndex:page - 1] rectValue];
3267 }
3268
3269 - (void)drawPageBorderWithSize:(NSSize)borderSize
3270 {
3271     ASSERT(NSEqualSizes(borderSize, [[[NSPrintOperation currentOperation] printInfo] paperSize]));
3272     [[self _webView] _drawHeaderAndFooter];
3273 }
3274
3275 - (void)beginDocument
3276 {
3277     NS_DURING
3278         // From now on we'll get a chance to call _endPrintMode in either beginDocument or
3279         // endDocument, so we can cancel the "just in case" pending call.
3280         [NSObject cancelPreviousPerformRequestsWithTarget:self
3281                                                  selector:@selector(_delayedEndPrintMode:)
3282                                                    object:[NSPrintOperation currentOperation]];
3283         [super beginDocument];
3284     NS_HANDLER
3285         // Exception during [super beginDocument] means that endDocument will not get called,
3286         // so we need to clean up our "print mode" here.
3287         [self _endPrintMode];
3288     NS_ENDHANDLER
3289 }
3290
3291 - (void)endDocument
3292 {
3293     [super endDocument];
3294     // Note sadly at this point [NSGraphicsContext currentContextDrawingToScreen] is still NO
3295     [self _endPrintMode];
3296 }
3297
3298 - (BOOL)_interceptEditingKeyEvent:(NSEvent *)event
3299 {
3300     // Use WebView's tabKeyCyclesThroughElements state to determine whether or not
3301     // to process tab key events. The idea here is that tabKeyCyclesThroughElements
3302     // will be YES when this WebView is being used in a browser, and we desire the
3303     // behavior where tab moves to the next element in tab order. If tabKeyCyclesThroughElements
3304     // is NO, it is likely that the WebView is being embedded as the whole view, as in Mail,
3305     // and tabs should input tabs as expected in a text editor. Using Option-Tab always cycles
3306     // through elements.
3307
3308     if ([[self _webView] tabKeyCyclesThroughElements] && [event _web_isTabKeyEvent])
3309         return NO;
3310
3311     if (![[self _webView] tabKeyCyclesThroughElements] && [event _web_isOptionTabKeyEvent])
3312         return NO;
3313
3314     // Now process the key normally
3315     [self interpretKeyEvents:[NSArray arrayWithObject:event]];
3316     return YES;
3317 }
3318
3319 - (void)keyDown:(NSEvent *)event
3320 {
3321     [self retain];
3322
3323     BOOL callSuper = NO;
3324
3325     _private->keyDownEvent = event;
3326
3327     WebFrameBridge *bridge = [self _bridge];
3328     if ([bridge interceptKeyEvent:event toView:self]) {
3329         // WebCore processed a key event, bail on any outstanding complete: UI
3330         [_private->compController endRevertingChange:YES moveLeft:NO];
3331     } else if (_private->compController && [_private->compController filterKeyDown:event]) {
3332         // Consumed by complete: popup window
3333     } else {
3334         // We're going to process a key event, bail on any outstanding complete: UI
3335         [_private->compController endRevertingChange:YES moveLeft:NO];
3336         BOOL handledKey = [self _canEdit] && [self _interceptEditingKeyEvent:event];
3337         if (!handledKey)
3338             callSuper = YES;
3339     }
3340     if (callSuper)
3341         [super keyDown:event];
3342     else
3343         [NSCursor setHiddenUntilMouseMoves:YES];
3344
3345     _private->keyDownEvent = nil;
3346
3347     [self release];
3348 }
3349
3350 - (void)keyUp:(NSEvent *)event
3351 {
3352     [self retain];
3353     if (![[self _bridge] interceptKeyEvent:event toView:self])
3354         [super keyUp:event];
3355     [self release];
3356 }
3357
3358 - (id)accessibilityAttributeValue:(NSString*)attributeName
3359 {
3360     if ([attributeName isEqualToString: NSAccessibilityChildrenAttribute]) {
3361         id accTree = [[self _bridge] accessibilityTree];
3362         if (accTree)
3363             return [NSArray arrayWithObject:accTree];
3364         return nil;
3365     }
3366     return [super accessibilityAttributeValue:attributeName];
3367 }
3368
3369 - (id)accessibilityFocusedUIElement
3370 {
3371     id accTree = [[self _bridge] accessibilityTree];
3372     if (accTree)
3373         return [accTree accessibilityFocusedUIElement];
3374     return self;
3375 }
3376
3377 - (id)accessibilityHitTest:(NSPoint)point
3378 {
3379     id accTree = [[self _bridge] accessibilityTree];
3380     if (accTree) {
3381         NSPoint windowCoord = [[self window] convertScreenToBase:point];
3382         return [accTree accessibilityHitTest:[self convertPoint:windowCoord fromView:nil]];
3383     }
3384     return self;
3385 }
3386
3387 - (id)_accessibilityParentForSubview:(NSView *)subview
3388 {
3389     id accTree = [[self _bridge] accessibilityTree];
3390     if (!accTree)
3391         return self;
3392     id parent = [accTree _accessibilityParentForSubview:subview];
3393     if (!parent)
3394         return self;
3395     return parent;
3396 }
3397
3398 - (void)centerSelectionInVisibleArea:(id)sender
3399 {
3400     [[self _bridge] centerSelectionInVisibleArea];
3401 }
3402
3403 - (void)moveBackward:(id)sender
3404 {
3405     if ([self _canAlterCurrentSelection])
3406         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectBackward granularity:WebBridgeSelectByCharacter];
3407 }
3408
3409 - (void)moveBackwardAndModifySelection:(id)sender
3410 {
3411     if ([self _canAlterCurrentSelection])
3412         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectBackward granularity:WebBridgeSelectByCharacter];
3413 }
3414
3415 - (void)moveDown:(id)sender
3416 {
3417     if ([self _canAlterCurrentSelection])
3418         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectForward granularity:WebBridgeSelectByLine];
3419 }
3420
3421 - (void)moveDownAndModifySelection:(id)sender
3422 {
3423     if ([self _canAlterCurrentSelection])
3424         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectForward granularity:WebBridgeSelectByLine];
3425 }
3426
3427 - (void)moveForward:(id)sender
3428 {
3429     if ([self _canAlterCurrentSelection])
3430         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectForward granularity:WebBridgeSelectByCharacter];
3431 }
3432
3433 - (void)moveForwardAndModifySelection:(id)sender
3434 {
3435     if ([self _canAlterCurrentSelection])
3436         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectForward granularity:WebBridgeSelectByCharacter];
3437 }
3438
3439 - (void)moveLeft:(id)sender
3440 {
3441     if ([self _canAlterCurrentSelection])
3442         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectLeft granularity:WebBridgeSelectByCharacter];
3443 }
3444
3445 - (void)moveLeftAndModifySelection:(id)sender
3446 {
3447     if ([self _canAlterCurrentSelection])
3448         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectLeft granularity:WebBridgeSelectByCharacter];
3449 }
3450
3451 - (void)moveRight:(id)sender
3452 {
3453     if ([self _canAlterCurrentSelection])
3454         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectRight granularity:WebBridgeSelectByCharacter];
3455 }
3456
3457 - (void)moveRightAndModifySelection:(id)sender
3458 {
3459     if ([self _canAlterCurrentSelection])
3460         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectRight granularity:WebBridgeSelectByCharacter];
3461 }
3462
3463 - (void)moveToBeginningOfDocument:(id)sender
3464 {
3465     if ([self _canAlterCurrentSelection])
3466         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectBackward granularity:WebBridgeSelectToDocumentBoundary];
3467 }
3468
3469 - (void)moveToBeginningOfDocumentAndModifySelection:(id)sender
3470 {
3471     if ([self _canAlterCurrentSelection])
3472         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectBackward granularity:WebBridgeSelectToDocumentBoundary];
3473 }
3474
3475 - (void)moveToBeginningOfSentence:(id)sender
3476 {
3477     if ([self _canAlterCurrentSelection])
3478         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectBackward granularity:WebBridgeSelectToSentenceBoundary];
3479 }
3480
3481 - (void)moveToBeginningOfSentenceAndModifySelection:(id)sender
3482 {
3483     if ([self _canAlterCurrentSelection])
3484         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectBackward granularity:WebBridgeSelectToSentenceBoundary];
3485 }
3486
3487 - (void)moveToBeginningOfLine:(id)sender
3488 {
3489     if ([self _canAlterCurrentSelection])
3490         [[self _bridge] alterCurrentSelection:WebSelectByMoving direction:WebBridgeSelectBackward granularity:WebBridgeSelectToLineBoundary];
3491 }
3492
3493 - (void)moveToBeginningOfLineAndModifySelection:(id)sender
3494 {
3495     if ([self _canAlterCurrentSelection])
3496         [[self _bridge] alterCurrentSelection:WebSelectByExtending direction:WebBridgeSelectBackward granularity:WebBridgeSelectToLineBoundary];
3497 }
3498
3499 - (void)moveToBeginningOfParagraph:(id)sender
3500 {
3501     if ([self _canAlterCurrentSelection])
3502         [[self _br