webview.mm

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        bzero(cache, sizeof(WebFrameLoadDelegateImplementationCache));
        return;
    }

    cache->didCancelClientRedirectForFrameFunc = getMethod(delegate, @selector(webView:didCancelClientRedirectForFrame:));
    cache->didChangeLocationWithinPageForFrameFunc = getMethod(delegate, @selector(webView:didChangeLocationWithinPageForFrame:));
    cache->didClearWindowObjectForFrameFunc = getMethod(delegate, @selector(webView:didClearWindowObject:forFrame:));
    cache->didCommitLoadForFrameFunc = getMethod(delegate, @selector(webView:didCommitLoadForFrame:));
    cache->didFailLoadWithErrorForFrameFunc = getMethod(delegate, @selector(webView:didFailLoadWithError:forFrame:));
    cache->didFailProvisionalLoadWithErrorForFrameFunc = getMethod(delegate, @selector(webView:didFailProvisionalLoadWithError:forFrame:));
    cache->didFinishDocumentLoadForFrameFunc = getMethod(delegate, @selector(webView:didFinishDocumentLoadForFrame:));
    cache->didFinishLoadForFrameFunc = getMethod(delegate, @selector(webView:didFinishLoadForFrame:));
    cache->didFirstLayoutInFrameFunc = getMethod(delegate, @selector(webView:didFirstLayoutInFrame:));
    cache->didFirstVisuallyNonEmptyLayoutInFrameFunc = getMethod(delegate, @selector(webView:didFirstVisuallyNonEmptyLayoutInFrame:));
    cache->didHandleOnloadEventsForFrameFunc = getMethod(delegate, @selector(webView:didHandleOnloadEventsForFrame:));
    cache->didReceiveIconForFrameFunc = getMethod(delegate, @selector(webView:didReceiveIcon:forFrame:));
    cache->didReceiveServerRedirectForProvisionalLoadForFrameFunc = getMethod(delegate, @selector(webView:didReceiveServerRedirectForProvisionalLoadForFrame:));
    cache->didReceiveTitleForFrameFunc = getMethod(delegate, @selector(webView:didReceiveTitle:forFrame:));
    cache->didStartProvisionalLoadForFrameFunc = getMethod(delegate, @selector(webView:didStartProvisionalLoadForFrame:));
    cache->willCloseFrameFunc = getMethod(delegate, @selector(webView:willCloseFrame:));
    cache->willPerformClientRedirectToURLDelayFireDateForFrameFunc = getMethod(delegate, @selector(webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:));
    cache->windowScriptObjectAvailableFunc = getMethod(delegate, @selector(webView:windowScriptObjectAvailable:));
}

WebFrameLoadDelegateImplementationCache* WebViewGetFrameLoadDelegateImplementations(WebView *webView)
{
    static WebFrameLoadDelegateImplementationCache empty;
    if (!webView)
        return ∅
    return &webView->_private->frameLoadDelegateImplementations;
}

- (void)_cacheScriptDebugDelegateImplementations
{
    WebScriptDebugDelegateImplementationCache *cache = &_private->scriptDebugDelegateImplementations;
    id delegate = _private->scriptDebugDelegate;

    if (!delegate) {
        bzero(cache, sizeof(WebScriptDebugDelegateImplementationCache));
        return;
    }

    cache->didParseSourceFunc = getMethod(delegate, @selector(webView:didParseSource:baseLineNumber:fromURL:sourceId:forWebFrame:));
    if (cache->didParseSourceFunc)
        cache->didParseSourceExpectsBaseLineNumber = YES;
    else
        cache->didParseSourceFunc = getMethod(delegate, @selector(webView:didParseSource:fromURL:sourceId:forWebFrame:));

    cache->failedToParseSourceFunc = getMethod(delegate, @selector(webView:failedToParseSource:baseLineNumber:fromURL:withError:forWebFrame:));
    cache->didEnterCallFrameFunc = getMethod(delegate, @selector(webView:didEnterCallFrame:sourceId:line:forWebFrame:));
    cache->willExecuteStatementFunc = getMethod(delegate, @selector(webView:willExecuteStatement:sourceId:line:forWebFrame:));
    cache->willLeaveCallFrameFunc = getMethod(delegate, @selector(webView:willLeaveCallFrame:sourceId:line:forWebFrame:));
    cache->exceptionWasRaisedFunc = getMethod(delegate, @selector(webView:exceptionWasRaised:sourceId:line:forWebFrame:));
}

WebScriptDebugDelegateImplementationCache* WebViewGetScriptDebugDelegateImplementations(WebView *webView)
{
    static WebScriptDebugDelegateImplementationCache empty;
    if (!webView)
        return ∅
    return &webView->_private->scriptDebugDelegateImplementations;
}

- (id)_policyDelegateForwarder
{
    if (!_private->policyDelegateForwarder)
        _private->policyDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:_private->policyDelegate defaultTarget:[WebDefaultPolicyDelegate sharedPolicyDelegate] catchExceptions:_private->catchesDelegateExceptions];
    return _private->policyDelegateForwarder;
}

- (id)_UIDelegateForwarder
{
    if (!_private->UIDelegateForwarder)
        _private->UIDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:_private->UIDelegate defaultTarget:[WebDefaultUIDelegate sharedUIDelegate] catchExceptions:_private->catchesDelegateExceptions];
    return _private->UIDelegateForwarder;
}

- (id)_editingDelegateForwarder
{
    // This can be called during window deallocation by QTMovieView in the QuickTime Cocoa Plug-in.
    // Not sure if that is a bug or not.
    if (!_private)
        return nil;

    if (!_private->editingDelegateForwarder)
        _private->editingDelegateForwarder = [[_WebSafeForwarder alloc] initWithTarget:_private->editingDelegate defaultTarget:[WebDefaultEditingDelegate sharedEditingDelegate] catchExceptions:_private->catchesDelegateExceptions];
    return _private->editingDelegateForwarder;
}

- (void)_closeWindow
{
    [[self _UIDelegateForwarder] webViewClose:self];
}

+ (void)_unregisterViewClassAndRepresentationClassForMIMEType:(NSString *)MIMEType
{
    [[WebFrameView _viewTypesAllowImageTypeOmission:NO] removeObjectForKey:MIMEType];
    [[WebDataSource _repTypesAllowImageTypeOmission:NO] removeObjectForKey:MIMEType];
    
    // FIXME: We also need to maintain MIMEType registrations (which can be dynamically changed)
    // in the WebCore MIMEType registry.  For now we're doing this in a safe, limited manner
    // to fix <rdar://problem/5372989> - a future revamping of the entire system is neccesary for future robustness
    MIMETypeRegistry::getSupportedNonImageMIMETypes().remove(MIMEType);
}

+ (void)_registerViewClass:(Class)viewClass representationClass:(Class)representationClass forURLScheme:(NSString *)URLScheme
{
    NSString *MIMEType = [self _generatedMIMETypeForURLScheme:URLScheme];
    [self registerViewClass:viewClass representationClass:representationClass forMIMEType:MIMEType];

    // FIXME: We also need to maintain MIMEType registrations (which can be dynamically changed)
    // in the WebCore MIMEType registry.  For now we're doing this in a safe, limited manner
    // to fix <rdar://problem/5372989> - a future revamping of the entire system is neccesary for future robustness
    if ([viewClass class] == [WebHTMLView class])
        MIMETypeRegistry::getSupportedNonImageMIMETypes().add(MIMEType);
    
    // This is used to make _representationExistsForURLScheme faster.
    // Without this set, we'd have to create the MIME type each time.
    if (schemesWithRepresentationsSet == nil) {
        schemesWithRepresentationsSet = [[NSMutableSet alloc] init];
    }
    [schemesWithRepresentationsSet addObject:[[[URLScheme lowercaseString] copy] autorelease]];
}

+ (NSString *)_generatedMIMETypeForURLScheme:(NSString *)URLScheme
{
    return [@"x-apple-web-kit/" stringByAppendingString:[URLScheme lowercaseString]];
}

+ (BOOL)_representationExistsForURLScheme:(NSString *)URLScheme
{
    return [schemesWithRepresentationsSet containsObject:[URLScheme lowercaseString]];
}

+ (BOOL)_canHandleRequest:(NSURLRequest *)request forMainFrame:(BOOL)forMainFrame
{
    // FIXME: If <rdar://problem/5217309> gets fixed, this check can be removed.
    if (!request)
        return NO;

    if ([NSURLConnection canHandleRequest:request])
        return YES;

    NSString *scheme = [[request URL] scheme];

    // Representations for URL schemes work at the top level.
    if (forMainFrame && [self _representationExistsForURLScheme:scheme])
        return YES;
        
    return [scheme _webkit_isCaseInsensitiveEqualToString:@"applewebdata"];
}

+ (BOOL)_canHandleRequest:(NSURLRequest *)request
{
    return [self _canHandleRequest:request forMainFrame:YES];
}

+ (NSString *)_decodeData:(NSData *)data
{
    HTMLNames::init(); // this method is used for importing bookmarks at startup, so HTMLNames are likely to be uninitialized yet
    RefPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("text/html"); // bookmark files are HTML
    String result = decoder->decode(static_cast<const char*>([data bytes]), [data length]);
    result += decoder->flush();
    return result;
}

- (void)_pushPerformingProgrammaticFocus
{
    _private->programmaticFocusCount++;
}

- (void)_popPerformingProgrammaticFocus
{
    _private->programmaticFocusCount--;
}

- (BOOL)_isPerformingProgrammaticFocus
{
    return _private->programmaticFocusCount != 0;
}

- (void)_didChangeValueForKey: (NSString *)key
{
    LOG (Bindings, "calling didChangeValueForKey: %@", key);
    [self didChangeValueForKey: key];
}

- (void)_willChangeValueForKey: (NSString *)key
{
    LOG (Bindings, "calling willChangeValueForKey: %@", key);
    [self willChangeValueForKey: key];
}

+ (BOOL)automaticallyNotifiesObserversForKey:(NSString *)key {
    static NSSet *manualNotifyKeys = nil;
    if (!manualNotifyKeys)
        manualNotifyKeys = [[NSSet alloc] initWithObjects:_WebMainFrameURLKey, _WebIsLoadingKey, _WebEstimatedProgressKey,
            _WebCanGoBackKey, _WebCanGoForwardKey, _WebMainFrameTitleKey, _WebMainFrameIconKey, _WebMainFrameDocumentKey,
#if USE(ACCELERATED_COMPOSITING)
            UsingAcceleratedCompositingProperty, // used by DRT
#endif            
            nil];
    if ([manualNotifyKeys containsObject:key])
        return NO;
    return YES;
}

- (NSArray *)_declaredKeys {
    static NSArray *declaredKeys = nil;
    if (!declaredKeys)
        declaredKeys = [[NSArray alloc] initWithObjects:_WebMainFrameURLKey, _WebIsLoadingKey, _WebEstimatedProgressKey,
            _WebCanGoBackKey, _WebCanGoForwardKey, _WebMainFrameTitleKey, _WebMainFrameIconKey, _WebMainFrameDocumentKey, nil];
    return declaredKeys;
}

- (void)setObservationInfo:(void *)info
{
    _private->observationInfo = info;
}

- (void *)observationInfo
{
    return _private->observationInfo;
}

- (void)_willChangeBackForwardKeys
{
    [self _willChangeValueForKey: _WebCanGoBackKey];
    [self _willChangeValueForKey: _WebCanGoForwardKey];
}

- (void)_didChangeBackForwardKeys
{
    [self _didChangeValueForKey: _WebCanGoBackKey];
    [self _didChangeValueForKey: _WebCanGoForwardKey];
}

- (void)_didStartProvisionalLoadForFrame:(WebFrame *)frame
{
    [self _willChangeBackForwardKeys];
    if (frame == [self mainFrame]){
        // Force an observer update by sending a will/did.
        [self _willChangeValueForKey: _WebIsLoadingKey];
        [self _didChangeValueForKey: _WebIsLoadingKey];

        [self _willChangeValueForKey: _WebMainFrameURLKey];
    }

    [NSApp setWindowsNeedUpdate:YES];
}

- (void)_didCommitLoadForFrame:(WebFrame *)frame
{
    if (frame == [self mainFrame])
        [self _didChangeValueForKey: _WebMainFrameURLKey];
    [NSApp setWindowsNeedUpdate:YES];
}

- (void)_didFinishLoadForFrame:(WebFrame *)frame
{
    [self _didChangeBackForwardKeys];
    if (frame == [self mainFrame]){
        // Force an observer update by sending a will/did.
        [self _willChangeValueForKey: _WebIsLoadingKey];
        [self _didChangeValueForKey: _WebIsLoadingKey];
    }
    [NSApp setWindowsNeedUpdate:YES];
}

- (void)_didFailLoadWithError:(NSError *)error forFrame:(WebFrame *)frame
{
    [self _didChangeBackForwardKeys];
    if (frame == [self mainFrame]){
        // Force an observer update by sending a will/did.
        [self _willChangeValueForKey: _WebIsLoadingKey];
        [self _didChangeValueForKey: _WebIsLoadingKey];
    }
    [NSApp setWindowsNeedUpdate:YES];
}

- (void)_didFailProvisionalLoadWithError:(NSError *)error forFrame:(WebFrame *)frame
{
    [self _didChangeBackForwardKeys];
    if (frame == [self mainFrame]){
        // Force an observer update by sending a will/did.
        [self _willChangeValueForKey: _WebIsLoadingKey];
        [self _didChangeValueForKey: _WebIsLoadingKey];
        
        [self _didChangeValueForKey: _WebMainFrameURLKey];
    }
    [NSApp setWindowsNeedUpdate:YES];
}

- (NSCachedURLResponse *)_cachedResponseForURL:(NSURL *)URL
{
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:URL];
    [request _web_setHTTPUserAgent:[self userAgentForURL:URL]];
    NSCachedURLResponse *cachedResponse = [[NSURLCache sharedURLCache] cachedResponseForRequest:request];
    [request release];
    return cachedResponse;
}

- (void)_writeImageForElement:(NSDictionary *)element withPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard
{
    NSURL *linkURL = [element objectForKey:WebElementLinkURLKey];
    DOMElement *domElement = [element objectForKey:WebElementDOMNodeKey];
    [pasteboard _web_writeImage:(NSImage *)(domElement ? nil : [element objectForKey:WebElementImageKey])
                        element:domElement
                            URL:linkURL ? linkURL : (NSURL *)[element objectForKey:WebElementImageURLKey]
                          title:[element objectForKey:WebElementImageAltStringKey] 
                        archive:[[element objectForKey:WebElementDOMNodeKey] webArchive]
                          types:types
                         source:nil];
}

- (void)_writeLinkElement:(NSDictionary *)element withPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard
{
    [pasteboard _web_writeURL:[element objectForKey:WebElementLinkURLKey]
                     andTitle:[element objectForKey:WebElementLinkLabelKey]
                        types:types];
}

- (void)_setInitiatedDrag:(BOOL)initiatedDrag
{
    if (!_private->page)
        return;
    _private->page->dragController()->setDidInitiateDrag(initiatedDrag);
}

#if ENABLE(DASHBOARD_SUPPORT)

#define DASHBOARD_CONTROL_LABEL @"control"

- (void)_addScrollerDashboardRegions:(NSMutableDictionary *)regions from:(NSArray *)views
{
    // Add scroller regions for NSScroller and KWQScrollBar
    int i, count = [views count];
    
    for (i = 0; i < count; i++) {
        NSView *aView = [views objectAtIndex:i];
        
        if ([aView isKindOfClass:[NSScroller class]] ||
            [aView isKindOfClass:NSClassFromString (@"KWQScrollBar")]) {
            NSRect bounds = [aView bounds];
            NSRect adjustedBounds;
            adjustedBounds.o