WebKitTools/DumpRenderTree/mac/DumpRenderTree.mm

/*
 * Copyright (C) 2005, 2006, 2007 Apple, Inc.  All rights reserved.
 *           (C) 2007 Graham Dennis (graham.dennis@gmail.com)
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#import "DumpRenderTree.h"

#import "EditingDelegate.h"
#import "EventSendingController.h"
#import "FrameLoadDelegate.h"
#import "LayoutTestController.h"
#import "NavigationController.h"
#import "ObjCPlugin.h"
#import "ObjCPluginFunction.h"
#import "PolicyDelegate.h"
#import "ResourceLoadDelegate.h"
#import "UIDelegate.h"
#import "WorkQueue.h"
#import "WorkQueueItem.h"

#import <ApplicationServices/ApplicationServices.h> // for CMSetDefaultProfileBySpace
#import <CoreFoundation/CoreFoundation.h>
#import <JavaScriptCore/Assertions.h>
#import <JavaScriptCore/JavaScriptCore.h>
#import <WebKit/DOMElementPrivate.h>
#import <WebKit/DOMExtensions.h>
#import <WebKit/DOMRange.h>
#import <WebKit/WebBackForwardList.h>
#import <WebKit/WebCoreStatistics.h>
#import <WebKit/WebDataSource.h>
#import <WebKit/WebDocumentPrivate.h>
#import <WebKit/WebEditingDelegate.h>
#import <WebKit/WebFrameView.h>
#import <WebKit/WebHistory.h>
#import <WebKit/WebHistoryItemPrivate.h>
#import <WebKit/WebPluginDatabase.h>
#import <WebKit/WebPreferences.h>
#import <WebKit/WebPreferencesPrivate.h>
#import <WebKit/WebResourceLoadDelegate.h>
#import <WebKit/WebViewPrivate.h>
#import <getopt.h>
#import <mach-o/getsect.h>
#import <malloc/malloc.h>
#import <objc/objc-runtime.h>                       // for class_poseAs
#import <pthread.h>

#define COMMON_DIGEST_FOR_OPENSSL
#import <CommonCrypto/CommonDigest.h>               // for MD5 functions

@interface DumpRenderTreeWindow : NSWindow
@end

@interface DumpRenderTreePasteboard : NSPasteboard
- (int)declareType:(NSString *)type owner:(id)newOwner;
@end

@interface DumpRenderTreeEvent : NSEvent
@end

@interface LocalPasteboard : NSPasteboard
{
    NSMutableArray *typesArray;
    NSMutableSet *typesSet;
    NSMutableDictionary *dataByType;
    int changeCount;
}
@end

static void runTest(const char *pathOrURL);
static NSString *md5HashStringForBitmap(CGImageRef bitmap);

// Deciding when it's OK to dump out the state is a bit tricky.  All these must be true:
// - There is no load in progress
// - There is no work queued up (see workQueue var, below)
// - waitToDump==NO.  This means either waitUntilDone was never called, or it was called
//       and notifyDone was called subsequently.
// Note that the call to notifyDone and the end of the load can happen in either order.

volatile bool done;

NavigationController* navigationController = 0;
LayoutTestController* layoutTestController = 0;

WebFrame *mainFrame = 0;
// This is the topmost frame that is loading, during a given load, or nil when no load is 
// in progress.  Usually this is the same as the main frame, but not always.  In the case
// where a frameset is loaded, and then new content is loaded into one of the child frames,
// that child frame is the "topmost frame that is loading".
WebFrame *topLoadingFrame = nil;     // !nil iff a load is in progress


CFMutableArrayRef allWindowsRef = 0;
CFMutableSetRef disallowedURLs = 0;
CFRunLoopTimerRef waitToDumpWatchdog = 0;

// Delegates
static FrameLoadDelegate *frameLoadDelegate;
static UIDelegate *uiDelegate;
static EditingDelegate *editingDelegate;
static ResourceLoadDelegate *resourceLoadDelegate;
PolicyDelegate *policyDelegate;

static int dumpPixels;
static int paint;
static int dumpAllPixels;
static int threaded;
static BOOL readFromWindow;
static int testRepaintDefault;
static int repaintSweepHorizontallyDefault;
static int dumpTree = YES;
static BOOL printSeparators;
static NSString *currentTest = nil;

static NSMutableDictionary *localPasteboards;
static WebHistoryItem *prevTestBFItem = nil;  // current b/f item at the end of the previous test
static unsigned char* screenCaptureBuffer;
static CGColorSpaceRef sharedColorSpace;

const unsigned maxViewHeight = 600;
const unsigned maxViewWidth = 800;

static pthread_mutex_t javaScriptThreadsMutex = PTHREAD_MUTEX_INITIALIZER;
static BOOL javaScriptThreadsShouldTerminate;

static const int javaScriptThreadsCount = 4;
static CFMutableDictionaryRef javaScriptThreads()
{
    assert(pthread_mutex_trylock(&javaScriptThreadsMutex) == EBUSY);
    static CFMutableDictionaryRef staticJavaScriptThreads;
    if (!staticJavaScriptThreads)
        staticJavaScriptThreads = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, NULL, NULL);
    return staticJavaScriptThreads;
}

// Loops forever, running a script and randomly respawning, until 
// javaScriptThreadsShouldTerminate becomes true.
void* runJavaScriptThread(void* arg)
{
    const char* const script =
        "var array = [];"
        "for (var i = 0; i < 10; i++) {"
        "    array.push(String(i));"
        "}";

    while(1) {
        JSGlobalContextRef ctx = JSGlobalContextCreate(NULL);
        JSStringRef scriptRef = JSStringCreateWithUTF8CString(script);

        JSValueRef exception = NULL;
        JSEvaluateScript(ctx, scriptRef, NULL, NULL, 0, &exception);
        assert(!exception);
        
        JSGlobalContextRelease(ctx);
        JSStringRelease(scriptRef);
        
        JSGarbageCollect(ctx);

        pthread_mutex_lock(&javaScriptThreadsMutex);

        // Check for cancellation.
        if (javaScriptThreadsShouldTerminate) {
            pthread_mutex_unlock(&javaScriptThreadsMutex);
            return 0;
        }

        // Respawn probabilistically.
        if (random() % 5 == 0) {
            pthread_t pthread;
            pthread_create(&pthread, NULL, &runJavaScriptThread, NULL);
            pthread_detach(pthread);

            CFDictionaryRemoveValue(javaScriptThreads(), pthread_self());
            CFDictionaryAddValue(javaScriptThreads(), pthread, NULL);

            pthread_mutex_unlock(&javaScriptThreadsMutex);
            return 0;
        }

        pthread_mutex_unlock(&javaScriptThreadsMutex);
    }
}

static void startJavaScriptThreads()
{
    pthread_mutex_lock(&javaScriptThreadsMutex);

    for (int i = 0; i < javaScriptThreadsCount; i++) {
        pthread_t pthread;
        pthread_create(&pthread, NULL, &runJavaScriptThread, NULL);
        pthread_detach(pthread);
        CFDictionaryAddValue(javaScriptThreads(), pthread, NULL);
    }

    pthread_mutex_unlock(&javaScriptThreadsMutex);
}

static void stopJavaScriptThreads()
{
    pthread_mutex_lock(&javaScriptThreadsMutex);

    javaScriptThreadsShouldTerminate = true;

    pthread_t* pthreads[javaScriptThreadsCount] = { 0 };
    ASSERT(CFDictionaryGetCount(javaScriptThreads()) == javaScriptThreadsCount);
    CFDictionaryGetKeysAndValues(javaScriptThreads(), (const void**)pthreads, 0);

    pthread_mutex_unlock(&javaScriptThreadsMutex);

    for (int i = 0; i < javaScriptThreadsCount; i++) {
        pthread_t* pthread = pthreads[i];
        pthread_join(*pthread, 0);
        free(pthread);
    }
}

static BOOL shouldIgnoreWebCoreNodeLeaks(CFStringRef URLString)
{
    static CFStringRef const ignoreSet[] = {
        // Keeping this infrastructure around in case we ever need it again.
    };
    static const int ignoreSetCount = sizeof(ignoreSet) / sizeof(CFStringRef);
    
    for (int i = 0; i < ignoreSetCount; i++) {
        CFStringRef ignoreString = ignoreSet[i];
        CFRange range = CFRangeMake(0, CFStringGetLength(URLString));
        CFOptionFlags flags = kCFCompareAnchored | kCFCompareBackwards | kCFCompareCaseInsensitive;
        if (CFStringFindWithOptions(URLString, ignoreString, range, flags, NULL))
            return YES;
    }
    return NO;
}

static CMProfileRef currentColorProfile = 0;
static void restoreColorSpace(int ignored)
{
    if (currentColorProfile) {
        int error = CMSetDefaultProfileByUse(cmDisplayUse, currentColorProfile);
        if (error)
            fprintf(stderr, "Failed to retore previous color profile!  You may need to open System Preferences : Displays : Color and manually restore your color settings.  (Error: %i)", error);
        currentColorProfile = 0;
    }
}

static void crashHandler(int sig)
{
    fprintf(stderr, "%s\n", strsignal(sig));
    restoreColorSpace(0);
    exit(128 + sig);
}

static void activateAhemFont()
{    
    unsigned long fontDataLength;
    char* fontData = getsectdata("__DATA", "Ahem", &fontDataLength);
    if (!fontData) {
        fprintf(stderr, "Failed to locate the Ahem font.\n");
        exit(1);
    }

    ATSFontContainerRef fontContainer;
    OSStatus status = ATSFontActivateFromMemory(fontData, fontDataLength, kATSFontContextLocal, kATSFontFormatUnspecified, NULL, kATSOptionFlagsDefault, &fontContainer);

    if (status != noErr) {
        fprintf(stderr, "Failed to activate the Ahem font.\n");
        exit(1);
    }
}

static void setDefaultColorProfileToRGB()
{
    CMProfileRef genericProfile = (CMProfileRef)[[NSColorSpace genericRGBColorSpace] colorSyncProfile];
    CMProfileRef previousProfile;
    int error = CMGetDefaultProfileByUse(cmDisplayUse, &previousProfile);
    if (error) {
        fprintf(stderr, "Failed to get current color profile.  I will not be able to restore your current profile, thus I'm not changing it.  Many pixel tests may fail as a result.  (Error: %i)\n", error);
        return;
    }
    if (previousProfile == genericProfile)
        return;
    CFStringRef previousProfileName;
    CFStringRef genericProfileName;
    char previousProfileNameString[1024];
    char genericProfileNameString[1024];
    CMCopyProfileDescriptionString(previousProfile, &previousProfileName);
    CMCopyProfileDescriptionString(genericProfile, &genericProfileName);
    CFStringGetCString(previousProfileName, previousProfileNameString, sizeof(previousProfileNameString), kCFStringEncodingUTF8);
    CFStringGetCString(genericProfileName, genericProfileNameString, sizeof(previousProfileNameString), kCFStringEncodingUTF8);
    CFRelease(genericProfileName);
    CFRelease(previousProfileName);
    
    fprintf(stderr, "\n\nWARNING: Temporarily changing your system color profile from \"%s\" to \"%s\".\n", previousProfileNameString, genericProfileNameString);
    fprintf(stderr, "This allows the WebKit pixel-based regression tests to have consistent color values across all machines.\n");
    fprintf(stderr, "The colors on your screen will change for the duration of the testing.\n\n");
    
    if ((error = CMSetDefaultProfileByUse(cmDisplayUse, genericProfile)))
        fprintf(stderr, "Failed to set color profile to \"%s\"! Many pixel tests will fail as a result.  (Error: %i)",
            genericProfileNameString, error);
    else {
        currentColorProfile = previousProfile;
        signal(SIGINT, restoreColorSpace);
        signal(SIGHUP, restoreColorSpace);
        signal(SIGTERM, restoreColorSpace);
    }
}

static void* (*savedMalloc)(malloc_zone_t*, size_t);
static void* (*savedRealloc)(malloc_zone_t*, void*, size_t);

static void* checkedMalloc(malloc_zone_t* zone, size_t size)
{
    if (size >= 0x10000000)
        return 0;
    return savedMalloc(zone, size);
}

static void* checkedRealloc(malloc_zone_t* zone, void* ptr, size_t size)
{
    if (size >= 0x10000000)
        return 0;
    return savedRealloc(zone, ptr, size);
}

static void makeLargeMallocFailSilently()
{
    malloc_zone_t* zone = malloc_default_zone();
    savedMalloc = zone->malloc;
    savedRealloc = zone->realloc;
    zone->malloc = checkedMalloc;
    zone->realloc = checkedRealloc;
}

WebView *createWebView()
{
    NSRect rect = NSMakeRect(0, 0, maxViewWidth, maxViewHeight);
    WebView *webView = [[WebView alloc] initWithFrame:rect frameName:nil groupName:@"org.webkit.DumpRenderTree"];
        
    [webView setUIDelegate:uiDelegate];
    [webView setFrameLoadDelegate:frameLoadDelegate];
    [webView setEditingDelegate:editingDelegate];
    [webView setResourceLoadDelegate:resourceLoadDelegate];

    // Register the same schemes that Safari does
    [WebView registerURLSchemeAsLocal:@"feed"];
    [WebView registerURLSchemeAsLocal:@"feeds"];
    [WebView registerURLSchemeAsLocal:@"feedsearch"];

    // The back/forward cache is causing problems due to layouts during transition from one page to another.
    // So, turn it off for now, but we might want to turn it back on some day.
    [[webView backForwardList] setPageCacheSize:0];
    
    [webView setContinuousSpellCheckingEnabled:YES];
    
    // To make things like certain NSViews, dragging, and plug-ins work, put the WebView a window, but put it off-screen so you don't see it.
    // Put it at -10000, -10000 in "flipped coordinates", since WebCore and the DOM use flipped coordinates.
    NSRect windowRect = NSOffsetRect(rect, -10000, [[[NSScreen screens] objectAtIndex:0] frame].size.height - rect.size.height + 10000);
    DumpRenderTreeWindow *window = [[DumpRenderTreeWindow alloc] initWithContentRect:windowRect styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:YES];
    [[window contentView] addSubview:webView];
    [window orderBack:nil];
    [window setAutodisplay:NO];
    
    // For reasons that are not entirely clear, the following pair of calls makes WebView handle its
    // dynamic scrollbars properly. Without it, every frame will always have scrollbars.
    NSBitmapImageRep *imageRep = [webView bitmapImageRepForCachingDisplayInRect:[webView bounds]];
    [webView cacheDisplayInRect:[webView bounds] toBitmapImageRep:imageRep];
        
    return webView;
}

void testStringByEvaluatingJavaScriptFromString()
{
    // maps expected result <= JavaScript expression
    NSDictionary *expressions = [NSDictionary dictionaryWithObjectsAndKeys:
        @"0", @"0", 
        @"0", @"'0'", 
        @"", @"",
        @"", @"''", 
        @"", @"new String()", 
        @"", @"new String('0')", 
        @"", @"throw 1", 
        @"", @"{ }", 
        @"", @"[ ]", 
        @"", @"//", 
        @"", @"a.b.c", 
        @"", @"(function() { throw 'error'; })()", 
        @"", @"null",
        @"", @"undefined",
        @"true", @"true",
        @"false", @"false",
        nil
    ];

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    WebView *webView = [[WebView alloc] initWithFrame:NSZeroRect frameName:@"" groupName:@""];

    NSEnumerator *enumerator = [expressions keyEnumerator];
    id expression;
    while ((expression = [enumerator nextObject])) {
        NSString *expectedResult = [expressions objectForKey:expression];
        NSString *result = [webView stringByEvaluatingJavaScriptFromString:expression];
        assert([result isEqualToString:expectedResult]);
    }

    [webView close];
    [webView release];
    [pool release];
}

void dumpRenderTree(int argc, const char *argv[])
{    
    [NSApplication sharedApplication];

    class_poseAs(objc_getClass("DumpRenderTreePasteboard"), objc_getClass("NSPasteboard"));
    class_poseAs(objc_getClass("DumpRenderTreeEvent"), objc_getClass("NSEvent"));

    struct option options[] = {
        {"dump-all-pixels", no_argument, &dumpAllPixels, YES},
        {"horizontal-sweep", no_argument, &repaintSweepHorizontallyDefault, YES},
        {"notree", no_argument, &dumpTree, NO},
        {"pixel-tests", no_argument, &dumpPixels, YES},
        {"paint", no_argument, &paint, YES},
        {"repaint", no_argument, &testRepaintDefault, YES},
        {"tree", no_argument, &dumpTree, YES},
        {"threaded", no_argument, &threaded, YES},
        {NULL, 0, NULL, 0}
    };

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:@"DoubleMax" forKey:@"AppleScrollBarVariant"];
    [defaults setInteger:4 forKey:@"AppleAntiAliasingThreshold"];
    // 2 is the "Medium" font smoothing mode
    [defaults setInteger:2 forKey:@"AppleFontSmoothing"];

    [defaults setInteger:1 forKey:@"AppleAquaColorVariant"];
    [defaults setObject:@"0.709800 0.835300 1.000000" forKey:@"AppleHighlightColor"];
    [defaults setObject:@"0.500000 0.500000 0.500000" forKey:@"AppleOtherHighlightColor"];
    
    [defaults setObject:[NSArray arrayWithObject:@"en"] forKey:@"AppleLanguages"];
    
    WebPreferences *preferences = [WebPreferences standardPreferences];
    
    [preferences setStandardFontFamily:@"Times"];
    [preferences setFixedFontFamily:@"Courier"];
    [preferences setSerifFontFamily:@"Times"];
    [preferences setSansSerifFontFamily:@"Helvetica"];
    [preferences setCursiveFontFamily:@"Apple Chancery"];
    [preferences setFantasyFontFamily:@"Papyrus"];
    [preferences setDefaultFontSize:16];
    [preferences setDefaultFixedFontSize:13];
    [preferences setMinimumFontSize:1];
    [preferences setJavaEnabled:NO];
    [preferences setJavaScriptCanOpenWindowsAutomatically:YES];
    [preferences setEditableLinkBehavior:WebKitEditableLinkOnlyLiveWithShiftKey];
    [preferences setTabsToLinks:NO];
    [preferences setDOMPasteAllowed:YES];
    
    int option;
    while ((option = getopt_long(argc, (char * const *)argv, "", options, NULL)) != -1)
        switch (option) {
            case '?':   // unknown or ambiguous option
            case ':':   // missing argument
                exit(1);
                break;
        }

    activateAhemFont();

    if (dumpPixels) {
        setDefaultColorProfileToRGB();
        screenCaptureBuffer = (unsigned char *)malloc(maxViewHeight * maxViewWidth * 4);
        sharedColorSpace = CGColorSpaceCreateDeviceRGB();
    }
    
    localPasteboards = [[NSMutableDictionary alloc] init];
    navigationController = [[NavigationController alloc] init];
    frameLoadDelegate = [[FrameLoadDelegate alloc] init];
    uiDelegate = [[UIDelegate alloc] init];
    editingDelegate = [[EditingDelegate alloc] init];    
    resourceLoadDelegate = [[ResourceLoadDelegate alloc] init];
    policyDelegate = [[PolicyDelegate alloc] init];
    
    NSString *pwd = [[NSString stringWithUTF8String:argv[0]] stringByDeletingLastPathComponent];
    [WebPluginDatabase setAdditionalWebPlugInPaths:[NSArray arrayWithObject:pwd]];
    [[WebPluginDatabase sharedDatabase] refresh];
    
    WebView *webView = createWebView();    
    mainFrame = [webView mainFrame];
    NSWindow *window = [webView window];

    makeLargeMallocFailSilently();

    signal(SIGILL, crashHandler);    /* 4:   illegal instruction (not reset when caught) */
    signal(SIGTRAP, crashHandler);   /* 5:   trace trap (not reset when caught) */
    signal(SIGEMT, crashHandler);    /* 7:   EMT instruction */
    signal(SIGFPE, crashHandler);    /* 8:   floating point exception */
    signal(SIGBUS, crashHandler);    /* 10:  bus error */
    signal(SIGSEGV, crashHandler);   /* 11:  segmentation violation */
    signal(SIGSYS, crashHandler);    /* 12:  bad argument to system call */
    signal(SIGPIPE, crashHandler);   /* 13:  write on a pipe with no reader */
    signal(SIGXCPU, crashHandler);   /* 24:  exceeded CPU time limit */
    signal(SIGXFSZ, crashHandler);   /* 25:  exceeded file size limit */
    
    [[NSURLCache sharedURLCache] removeAllCachedResponses];
    
    // <rdar://problem/5222911>
    testStringByEvaluatingJavaScriptFromString();

    if (threaded)
        startJavaScriptThreads();
    
    if (argc == optind+1 && strcmp(argv[optind], "-") == 0) {
        char filenameBuffer[2048];
        printSeparators = YES;
        while (fgets(filenameBuffer, sizeof(filenameBuffer), stdin)) {
            char *newLineCharacter = strchr(filenameBuffer, '\n');
            if (newLineCharacter)
                *newLineCharacter = '\0';
            
            if (strlen(filenameBuffer) == 0)
                continue;
                
            runTest(filenameBuffer);
        }
    } else {
        printSeparators = (optind < argc-1 || (dumpPixels && dumpTree));
        for (int i = optind; i != argc; ++i)
            runTest(argv[i]);
    }

    if (threaded)
        stopJavaScriptThreads();

    [WebCoreStatistics emptyCache]; // Otherwise SVGImages trigger false positives for Frame/Node counts    
    [webView close];
    mainFrame = nil;

    // Work around problem where registering drag types leaves an outstanding
    // "perform selector" on the window, which retains the window. It's a bit
    // inelegant and perhaps dangerous to just blow them all away, but in practice
    // it probably won't cause any trouble (and this is just a test tool, after all).
    [NSObject cancelPreviousPerformRequestsWithTarget:window];
    
    [window close]; // releases when closed
    [webView release];
    [frameLoadDelegate release];
    [editingDelegate release];
    [resourceLoadDelegate release];
    [uiDelegate release];
    [policyDelegate release];
    
    [localPasteboards release];
    localPasteboards = nil;
    
    [navigationController release];
    navigationController = nil;

    if (disallowedURLs) {
        CFRelease(disallowedURLs);
        disallowedURLs = 0;
    }

    if (dumpPixels)
        restoreColorSpace(0);
}

int main(int argc, const char *argv[])
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    dumpRenderTree(argc, argv);
    [WebCoreStatistics garbageCollectJavaScriptObjects];
    [pool release];
    return 0;
}

static int compareHistoryItems(id item1, id item2, void *context)
{
    return [[item1 target] caseInsensitiveCompare:[item2 target]];
}

static void dumpHistoryItem(WebHistoryItem *item, int indent, BOOL current)
{
    int start = 0;
    if (current) {
        printf("curr->");
        start = 6;
    }
    for (int i = start; i < indent; i++)
        putchar(' ');
    printf("%s", [[item URLString] UTF8String]);
    NSString *target = [item target];
    if (target && [target length] > 0)
        printf(" (in frame \"%s\")", [target UTF8String]);
    if ([item isTargetItem])
        printf("  **nav target**");
    putchar('\n');
    NSArray *kids = [item children];
    if (kids) {
        // must sort to eliminate arbitrary result ordering which defeats reproducible testing
        kids = [kids sortedArrayUsingFunction:&compareHistoryItems context:nil];
        for (unsigned i = 0; i < [kids count]; i++)
            dumpHistoryItem([kids objectAtIndex:i], indent+4, NO);
    }
}

static void dumpFrameScrollPosition(WebFrame *f)
{
    NSPoint scrollPosition = [[[[f frameView] documentView] superview] bounds].origin;
    if (ABS(scrollPosition.x) > 0.00000001 || ABS(scrollPosition.y) > 0.00000001) {
        if ([f parentFrame] != nil)
            printf("frame '%s' ", [[f name] UTF8String]);
        printf("scrolled to %.f,%.f\n", scrollPosition.x, scrollPosition.y);
    }

    if (layoutTestController->dumpChildFrameScrollPositions()) {
        NSArray *kids = [f childFrames];
        if (kids)
            for (unsigned i = 0; i < [kids count]; i++)
                dumpFrameScrollPosition([kids objectAtIndex:i]);
    }
}

static NSString *dumpFramesAsText(WebFrame *frame)
{
    if (!frame)
        return @"";

    DOMDocument *document = [frame DOMDocument];
    if (!document)
        return @"";

    DOMElement *documentElement = [document documentElement];
    if (!documentElement)
        return @"";

    NSMutableString *result = [[[NSMutableString alloc] init] autorelease];

    // Add header for all but the main frame.
    if ([frame parentFrame])
        result = [NSMutableString stringWithFormat:@"\n--------\nFrame: '%@'\n--------\n", [frame name]];

    [result appendFormat:@"%@\n", [documentElement innerText]];

    if (layoutTestController->dumpChildFramesAsText()) {
        NSArray *kids = [frame childFrames];
        if (kids) {
            for (unsigned i = 0; i < [kids count]; i++)
                [result appendString:dumpFramesAsText([kids objectAtIndex:i])];
        }
    }

    return result;
}

static void convertMIMEType(NSMutableString *mimeType)
{
    if ([mimeType isEqualToString:@"application/x-javascript"])
        [mimeType setString:@"text/javascript"];
}

static void convertWebResourceDataToString(NSMutableDictionary *resource)
{
    NSMutableString *mimeType = [resource objectForKey:@"WebResourceMIMEType"];
    convertMIMEType(mimeType);
    
    if ([mimeType hasPrefix:@"text/"]) {
        NSData *data = [resource objectForKey:@"WebResourceData"];
        NSString *dataAsString = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
        [resource setObject:dataAsString forKey:@"WebResourceData"];
    }
}

static void normalizeWebResourceURL(NSMutableString *webResourceURL, NSString *oldURLBase)
{
    [webResourceURL replaceOccurrencesOfString:oldURLBase
                                    withString:@"file://"
                                       options:NSLiteralSearch
                                         range:NSMakeRange(0, [webResourceURL length])];
}

static void convertWebResourceResponseToDictionary(NSMutableDictionary *propertyList, NSString *oldURLBase)
{
    NSURLResponse *response = nil;
    NSData *responseData = [propertyList objectForKey:@"WebResourceResponse"]; // WebResourceResponseKey in WebResource.m
    if ([responseData isKindOfClass:[NSData class]]) {
        // Decode NSURLResponse
        NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:responseData];
        response = [unarchiver decodeObjectForKey:@"WebResourceResponse"]; // WebResourceResponseKey in WebResource.m
        [unarchiver finishDecoding];
        [unarchiver release];
    }        
    
    NSMutableDictionary *responseDictionary = [[NSMutableDictionary alloc] init];
    
    NSMutableString *urlString = [[[response URL] description] mutableCopy];
    normalizeWebResourceURL(urlString, oldURLBase);
    [responseDictionary setObject:urlString forKey:@"URL"];
    [urlString release];
    
    NSMutableString *mimeTypeString = [[response MIMEType] mutableCopy];
    convertMIMEType(mimeTypeString);
    [responseDictionary setObject:mimeTypeString forKey:@"MIMEType"];
    [mimeTypeString release];

    NSString *textEncodingName = [response textEncodingName];
    if (textEncodingName)
        [responseDictionary setObject:textEncodingName forKey:@"textEncodingName"];
    [responseDictionary setObject:[NSNumber numberWithLongLong:[response expectedContentLength]] forKey:@"expectedContentLength"];
    
    if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
        
        [responseDictionary setObject:[httpResponse allHeaderFields] forKey:@"allHeaderFields"];
        [responseDictionary setObject:[NSNumber numberWithInt:[httpResponse statusCode]] forKey:@"statusCode"];
    }
    
    [propertyList setObject:responseDictionary forKey:@"WebResourceResponse"];
    [responseDictionary release];
}

static NSString *serializeWebArchiveToXML(WebArchive *webArchive)
{
    NSString *errorString;
    NSMutableDictionary *propertyList = [NSPropertyListSerialization propertyListFromData:[webArchive data]
                                                                         mutabilityOption:NSPropertyListMutableContainersAndLeaves
                                                                                   format:NULL
                                                                         errorDescription:&errorString];
    if (!propertyList)
        return errorString;

    // Normalize WebResourceResponse and WebResourceURL values in plist for testing
    NSString *cwdURL = [@"file://" stringByAppendingString:[[[NSFileManager defaultManager] currentDirectoryPath] stringByExpandingTildeInPath]];
    
    NSMutableArray *resources = [NSMutableArray arrayWithCapacity:1];
    [resources addObject:propertyList];

    while ([resources count]) {
        NSMutableDictionary *resourcePropertyList = [resources objectAtIndex:0];
        [resources removeObjectAtIndex:0];

        NSMutableDictionary *mainResource = [resourcePropertyList objectForKey:@"WebMainResource"];
        normalizeWebResourceURL([mainResource objectForKey:@"WebResourceURL"], cwdURL);
        convertWebResourceDataToString(mainResource);

        // Add subframeArchives to list for processing
        NSMutableArray *subframeArchives = [resourcePropertyList objectForKey:@"WebSubframeArchives"]; // WebSubframeArchivesKey in WebArchive.m
        if (subframeArchives)
            [resources addObjectsFromArray:subframeArchives];

        NSMutableArray *subresources = [resourcePropertyList objectForKey:@"WebSubresources"]; // WebSubresourcesKey in WebArchive.m
        NSEnumerator *enumerator = [subresources objectEnumerator];
        NSMutableDictionary *subresourcePropertyList;
        while ((subresourcePropertyList = [enumerator nextObject])) {
            normalizeWebResourceURL([subresourcePropertyList objectForKey:@"WebResourceURL"], cwdURL);
            convertWebResourceResponseToDictionary(subresourcePropertyList, cwdURL);
            convertWebResourceDataToString(subresourcePropertyList);
        }
    }

    NSData *xmlData = [NSPropertyListSerialization dataFromPropertyList:propertyList
                                                                 format:NSPropertyListXMLFormat_v1_0
                                                       errorDescription:&errorString];
    if (!xmlData)
        return errorString;

    NSMutableString *string = [[[NSMutableString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding] autorelease];

    // Replace "Apple Computer" with "Apple" in the DTD declaration.
    NSRange range = [string rangeOfString:@"-//Apple Computer//"];
    if (range.location != NSNotFound)
        [string replaceCharactersInRange:range withString:@"-//Apple//"];
    
    return string;
}

static void dumpBackForwardListForWebView(WebView *view)
{
    printf("\n============== Back Forward List ==============\n");
    WebBackForwardList *bfList = [view backForwardList];

    // Print out all items in the list after prevTestBFItem, which was from the previous test
    // Gather items from the end of the list, the print them out from oldest to newest
    NSMutableArray *itemsToPrint = [[NSMutableArray alloc] init];
    for (int i = [bfList forwardListCount]; i > 0; i--) {
        WebHistoryItem *item = [bfList itemAtIndex:i];
        // something is wrong if the item from the last test is in the forward part of the b/f list
        assert(item != prevTestBFItem);
        [itemsToPrint addObject:item];
    }
            
    assert([bfList currentItem] != prevTestBFItem);
    [itemsToPrint addObject:[bfList currentItem]];
    int currentItemIndex = [itemsToPrint count] - 1;

    for (int i = -1; i >= -[bfList backListCount]; i--) {
        WebHistoryItem *item = [bfList itemAtIndex:i];
        if (item == prevTestBFItem)
            break;
        [itemsToPrint addObject:item];
    }

    for (int i = [itemsToPrint count]-1; i >= 0; i--) {
        dumpHistoryItem([itemsToPrint objectAtIndex:i], 8, i == currentItemIndex);
    }
    [itemsToPrint release];
    printf("===============================================\n");
}

void dump()
{
    if (waitToDumpWatchdog) {
        CFRunLoopTimerInvalidate(waitToDumpWatchdog);
        CFRelease(waitToDumpWatchdog);
        waitToDumpWatchdog = 0;
    }

    if (dumpTree) {
        NSString *result = nil;
        
        bool dumpAsText = layoutTestController->dumpAsText();
        dumpAsText |= [[[[mainFrame dataSource] response] MIMEType] isEqualToString:@"text/plain"];
        layoutTestController->setDumpAsText(dumpAsText);
        if (layoutTestController->dumpAsText()) {
            result = dumpFramesAsText(mainFrame);
        } else if (layoutTestController->dumpDOMAsWebArchive()) {
            WebArchive *webArchive = [[mainFrame DOMDocument] webArchive];
            result = serializeWebArchiveToXML(webArchive);
        } else if (layoutTestController->dumpSourceAsWebArchive()) {
            WebArchive *webArchive = [[mainFrame dataSource] webArchive];
            result = serializeWebArchiveToXML(webArchive);
        } else {
            bool isSVGW3CTest = ([currentTest rangeOfString:@"svg/W3C-SVG-1.1"].length);
            if (isSVGW3CTest)
                [[mainFrame webView] setFrameSize:NSMakeSize(480, 360)];
            else 
                [[mainFrame webView] setFrameSize:NSMakeSize(maxViewWidth, maxViewHeight)];
            result = [mainFrame renderTreeAsExternalRepresentation];
        }

        if (!result) {
            const char *errorMessage;
            if (layoutTestController->dumpAsText())
                errorMessage = "[documentElement innerText]";
            else if (layoutTestController->dumpDOMAsWebArchive())
                errorMessage = "[[mainFrame DOMDocument] webArchive]";
            else if (layoutTestController->dumpSourceAsWebArchive())
                errorMessage = "[[mainFrame dataSource] webArchive]";
            else
                errorMessage = "[mainFrame renderTreeAsExternalRepresentation]";
            printf("ERROR: nil result from %s", errorMessage);
        } else {
            NSData *data = [result dataUsingEncoding:NSUTF8StringEncoding];
            fwrite([data bytes], 1, [data length], stdout);
            if (!layoutTestController->dumpAsText() && !layoutTestController->dumpDOMAsWebArchive() && !layoutTestController->dumpSourceAsWebArchive())
                dumpFrameScrollPosition(mainFrame);
        }

        if (layoutTestController->dumpBackForwardList()) {
            unsigned count = CFArrayGetCount(allWindowsRef);
            for (unsigned i = 0; i < count; i++) {
                NSWindow *window = (NSWindow *)CFArrayGetValueAtIndex(allWindowsRef, i);
                WebView *webView = [[[window contentView] subviews] objectAtIndex:0];
                dumpBackForwardListForWebView(webView);
            }
        }

        if (printSeparators)
            puts("#EOF");
    }
    
    if (dumpPixels) {
        if (!layoutTestController->dumpAsText() && !layoutTestController->dumpDOMAsWebArchive() && !layoutTestController->dumpSourceAsWebArchive()) {
            // grab a bitmap from the view
            WebView* view = [mainFrame webView];
            NSSize webViewSize = [view frame].size;

            CGContextRef cgContext = CGBitmapContextCreate(screenCaptureBuffer, static_cast<size_t>(webViewSize.width), static_cast<size_t>(webViewSize.height), 8, static_cast<size_t>(webViewSize.width) * 4, sharedColorSpace, kCGBitmapByteOrder32Host | kCGImageAlphaPremultipliedLast);

            NSGraphicsContext* savedContext = [[[NSGraphicsContext currentContext] retain] autorelease];
            NSGraphicsContext* nsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:cgContext flipped:NO];
            [NSGraphicsContext setCurrentContext:nsContext];

            if (readFromWindow) {
                NSBitmapImageRep *imageRep;
                [view displayIfNeeded];
                [view lockFocus];
                imageRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:[view frame]];
                [view unlockFocus];
                [imageRep draw];
                [imageRep release];
            } else if (!layoutTestController->testRepaint())
                [view displayRectIgnoringOpacity:NSMakeRect(0, 0, webViewSize.width, webViewSize.height) inContext:nsContext];
            else if (!layoutTestController->testRepaintSweepHorizontally()) {
                NSRect line = NSMakeRect(0, 0, webViewSize.width, 1);
                while (line.origin.y < webViewSize.height) {
                    [view displayRectIgnoringOpacity:line inContext:nsContext];
                    line.origin.y++;
                }
            } else {
                NSRect column = NSMakeRect(0, 0, 1, webViewSize.height);
                while (column.origin.x < webViewSize.width) {
                    [view displayRectIgnoringOpacity:column inContext:nsContext];
                    column.origin.x++;
                }
            }
            if (layoutTestController->dumpSelectionRect()) {
                NSView *documentView = [[mainFrame frameView] documentView];
                if ([documentView conformsToProtocol:@protocol(WebDocumentSelection)]) {
                    [[NSColor redColor] set];
                    [NSBezierPath strokeRect:[documentView convertRect:[(id <WebDocumentSelection>)documentView selectionRect] fromView:nil]];
                }
            }

            [NSGraphicsContext setCurrentContext:savedContext];
            
            CGImageRef bitmapImage = CGBitmapContextCreateImage(cgContext);
            CGContextRelease(cgContext);

            // compute the actual hash to compare to the expected image's hash
            NSString *actualHash = md5HashStringForBitmap(bitmapImage);
            printf("\nActualHash: %s\n", [actualHash UTF8String]);

            BOOL dumpImage;
            if (dumpAllPixels)
                dumpImage = YES;
            else {
                // FIXME: It's unfortunate that we hardcode the file naming scheme here.
                // At one time, the perl script had all the knowledge about file layout.
                // Some day we should restore that setup by passing in more parameters to this tool.
                NSString *baseTestPath = [currentTest stringByDeletingPathExtension];
                NSString *baselineHashPath = [baseTestPath stringByAppendingString:@"-expected.checksum"];
                NSString *baselineHash = [NSString stringWithContentsOfFile:baselineHashPath encoding:NSUTF8StringEncoding error:nil];
                NSString *baselineImagePath = [baseTestPath stringByAppendingString:@"-expected.png"];

                printf("BaselineHash: %s\n", [baselineHash UTF8String]);

                /// send the image to stdout if the hash mismatches or if there's no file in the file system
                dumpImage = ![baselineHash isEqualToString:actualHash] || access([baselineImagePath fileSystemRepresentation], F_OK) != 0;
            }
            
            if (dumpImage) {
                CFMutableDataRef imageData = CFDataCreateMutable(0, 0);
                CGImageDestinationRef imageDest = CGImageDestinationCreateWithData(imageData, CFSTR("public.png"), 1, 0);
                CGImageDestinationAddImage(imageDest, bitmapImage, 0);
                CGImageDestinationFinalize(imageDest);
                CFRelease(imageDest);
                printf("Content-length: %lu\n", CFDataGetLength(imageData));
                fwrite(CFDataGetBytePtr(imageData), 1, CFDataGetLength(imageData), stdout);
                CFRelease(imageData);
            }

            CGImageRelease(bitmapImage);
        }

        printf("#EOF\n");
    }
    
    fflush(stdout);

    if (paint)
        displayWebView();
    
    done = YES;
}

static bool shouldLogFrameLoadDelegates(const char *pathOrURL)
{
    return strstr(pathOrURL, "loading/");
}    

static void runTest(const char *pathOrURL)
{
    CFStringRef pathOrURLString = CFStringCreateWithCString(NULL, pathOrURL, kCFStringEncodingUTF8);
    if (!pathOrURLString) {
        fprintf(stderr, "can't parse filename as UTF-8\n");
        return;
    }
    
    CFURLRef URL;
    if (CFStringHasPrefix(pathOrURLString, CFSTR("http://")) || CFStringHasPrefix(pathOrURLString, CFSTR("https://")))
        URL = CFURLCreateWithString(NULL, pathOrURLString, NULL);
    else
        URL = CFURLCreateWithFileSystemPath(NULL, pathOrURLString, kCFURLPOSIXPathStyle, FALSE);
    
    if (!URL) {
        CFRelease(pathOrURLString);
        fprintf(stderr, "can't turn %s into a CFURL\n", pathOrURL);
        return;
    }

    layoutTestController = new LayoutTestController(testRepaintDefault, repaintSweepHorizontallyDefault);

    [(EditingDelegate *)[[mainFrame webView] editingDelegate] setAcceptsEditing:YES];
    [[mainFrame webView] makeTextStandardSize:nil];
    [[mainFrame webView] setTabKeyCyclesThroughElements: YES];
    [[mainFrame webView] setPolicyDelegate:nil];
    [[mainFrame webView] _setDashboardBehavior:WebDashboardBehaviorUseBackwardCompatibilityMode to:NO];
    [WebView _setUsesTestModeFocusRingColor:YES];

    topLoadingFrame = nil;

    done = NO;
    readFromWindow = NO;

    if (disallowedURLs)
        CFSetRemoveAllValues(disallowedURLs);
    if (shouldLogFrameLoadDelegates(pathOrURL))
        layoutTestController->setDumpFrameLoadCallbacks(true);

    if ([WebHistory optionalSharedHistory])
        [WebHistory setOptionalSharedHistory:nil];
    lastMousePosition = NSMakePoint(0, 0);

    if (currentTest != nil)
        CFRelease(currentTest);
    currentTest = (NSString *)pathOrURLString;
    [prevTestBFItem release];
    prevTestBFItem = [[[[mainFrame webView] backForwardList] currentItem] retain];

    WorkQueue::shared()->clear();
    WorkQueue::shared()->setFrozen(false);

    BOOL _shouldIgnoreWebCoreNodeLeaks = shouldIgnoreWebCoreNodeLeaks(CFURLGetString(URL));
    if (_shouldIgnoreWebCoreNodeLeaks)
        [WebCoreStatistics startIgnoringWebCoreNodeLeaks];

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    [mainFrame loadRequest:[NSURLRequest requestWithURL:(NSURL *)URL]];
    CFRelease(URL);
    [pool release];
    while (!done) {
        pool = [[NSAutoreleasePool alloc] init];
        [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantPast]];
        [pool release];
    }
    pool = [[NSAutoreleasePool alloc] init];
    [EventSendingController clearSavedEvents];
    [[mainFrame webView] setSelectedDOMRange:nil affinity:NSSelectionAffinityDownstream];

    WorkQueue::shared()->clear();

    if (layoutTestController->closeRemainingWindowsWhenComplete()) {
        NSArray* array = [(NSArray *)allWindowsRef copy];
        
        unsigned count = [array count];
        for (unsigned i = 0; i < count; i++) {
            NSWindow *window = [array objectAtIndex:i];

            // Don't try to close the main window
            if (window == [[mainFrame webView] window])
                continue;
            
            WebView *webView = [[[window contentView] subviews] objectAtIndex:0];

            [webView close];
            [window close];
        }
        [array release];
    }
    
    [pool release];

    // We should only have our main window left when we're done
    ASSERT(CFArrayGetCount(allWindowsRef) == 1);
    ASSERT(CFArrayGetValueAtIndex(allWindowsRef, 0) == [[mainFrame webView] window]);

    delete layoutTestController;
    layoutTestController = 0;

    if (_shouldIgnoreWebCoreNodeLeaks)
        [WebCoreStatistics stopIgnoringWebCoreNodeLeaks];
}

/* Hashes a bitmap and returns a text string for comparison and saving to a file */
static NSString *md5HashStringForBitmap(CGImageRef bitmap)
{
    MD5_CTX md5Context;
    unsigned char hash[16];
    
    unsigned bitsPerPixel = CGImageGetBitsPerPixel(bitmap);
    assert(bitsPerPixel == 32); // ImageDiff assumes 32 bit RGBA, we must as well.
    unsigned bytesPerPixel = bitsPerPixel / 8;
    unsigned pixelsHigh = CGImageGetHeight(bitmap);
    unsigned pixelsWide = CGImageGetWidth(bitmap);
    unsigned bytesPerRow = CGImageGetBytesPerRow(bitmap);
    assert(bytesPerRow >= (pixelsWide * bytesPerPixel));
    
    MD5_Init(&md5Context);
    unsigned char *bitmapData = screenCaptureBuffer;
    for (unsigned row = 0; row < pixelsHigh; row++) {
        MD5_Update(&md5Context, bitmapData, pixelsWide * bytesPerPixel);
        bitmapData += bytesPerRow;
    }
    MD5_Final(hash, &md5Context);
    
    char hex[33] = "";
    for (int i = 0; i < 16; i++) {
       snprintf(hex, 33, "%s%02x", hex, hash[i]);
    }

    return [NSString stringWithUTF8String:hex];
}

void displayWebView()
{
    NSView *webView = [mainFrame webView];
    [webView display];
    [webView lockFocus];
    [[[NSColor blackColor] colorWithAlphaComponent:0.66] set];
    NSRectFillUsingOperation([webView frame], NSCompositeSourceOver);
    [webView unlockFocus];
    readFromWindow = YES;
}

@implementation DumpRenderTreePasteboard

// Return a local pasteboard so we don't disturb the real pasteboards when running tests.
+ (NSPasteboard *)_pasteboardWithName:(NSString *)name
{
    static int number = 0;
    if (!name)
        name = [NSString stringWithFormat:@"LocalPasteboard%d", ++number];
    LocalPasteboard *pasteboard = [localPasteboards objectForKey:name];
    if (pasteboard)
        return pasteboard;
    pasteboard = [[LocalPasteboard alloc] init];
    [localPasteboards setObject:pasteboard forKey:name];
    [pasteboard release];
    return pasteboard;
}

// Convenience method for JS so that it doesn't have to try and create a NSArray on the objc side instead
// of the usual WebScriptObject that is passed around
- (int)declareType:(NSString *)type owner:(id)newOwner
{
    return [self declareTypes:[NSArray arrayWithObject:type] owner:newOwner];
}

@end

@implementation LocalPasteboard

+ (id)alloc
{
    return NSAllocateObject(self, 0, 0);
}

- (id)init
{
    typesArray = [[NSMutableArray alloc] init];
    typesSet = [[NSMutableSet alloc] init];
    dataByType = [[NSMutableDictionary alloc] init];
    return self;
}

- (void)dealloc
{
    [typesArray release];
    [typesSet release];
    [dataByType release];
    [super dealloc];
}

- (NSString *)name
{
    return nil;
}

- (void)releaseGlobally
{
}

- (int)declareTypes:(NSArray *)newTypes owner:(id)newOwner
{
    [typesArray removeAllObjects];
    [typesSet removeAllObjects];
    [dataByType removeAllObjects];
    return [self addTypes:newTypes owner:newOwner];
}

- (int)addTypes:(NSArray *)newTypes owner:(id)newOwner
{
    unsigned count = [newTypes count];
    unsigned i;
    for (i = 0; i < count; ++i) {
        NSString *type = [newTypes objectAtIndex:i];
        NSString *setType = [typesSet member:type];
        if (!setType) {
            setType = [type copy];
            [typesArray addObject:setType];
            [typesSet addObject:setType];
            [setType release];
        }
        if (newOwner && [newOwner respondsToSelector:@selector(pasteboard:provideDataForType:)])
            [newOwner pasteboard:self provideDataForType:setType];
    }
    return ++changeCount;
}

- (int)changeCount
{
    return changeCount;
}

- (NSArray *)types
{
    return typesArray;
}

- (NSString *)availableTypeFromArray:(NSArray *)types
{
    unsigned count = [types count];
    unsigned i;
    for (i = 0; i < count; ++i) {
        NSString *type = [types objectAtIndex:i];
        NSString *setType = [typesSet member:type];
        if (setType)
            return setType;
    }
    return nil;
}

- (BOOL)setData:(NSData *)data forType:(NSString *)dataType
{
    if (data == nil)
        data = [NSData data];
    if (![typesSet containsObject:dataType])
        return NO;
    [dataByType setObject:data forKey:dataType];
    ++changeCount;
    return YES;
}

- (NSData *)dataForType:(NSString *)dataType
{
    return [dataByType objectForKey:dataType];
}

- (BOOL)setPropertyList:(id)propertyList forType:(NSString *)dataType;
{
    CFDataRef data = NULL;
    if (propertyList)
        data = CFPropertyListCreateXMLData(NULL, propertyList);
    BOOL result = [self setData:(NSData *)data forType:dataType];
    if (data)
        CFRelease(data);
    return result;
}

- (BOOL)setString:(NSString *)string forType:(NSString *)dataType
{
    CFDataRef data = NULL;
    if (string) {
        if ([string length] == 0)
            data = CFDataCreate(NULL, NULL, 0);
        else
            data = CFStringCreateExternalRepresentation(NULL, (CFStringRef)string, kCFStringEncodingUTF8, 0);
    }
    BOOL result = [self setData:(NSData *)data forType:dataType];
    if (data)
        CFRelease(data);
    return result;
}

@end

static CFArrayCallBacks NonRetainingArrayCallbacks = {
    0,
    NULL,
    NULL,
    CFCopyDescription,
    CFEqual
};

@implementation DumpRenderTreeWindow

- (id)initWithContentRect:(NSRect)contentRect styleMask:(unsigned int)styleMask backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation
{
    if (!allWindowsRef)
        allWindowsRef = CFArrayCreateMutable(NULL, 0, &NonRetainingArrayCallbacks);

    CFArrayAppendValue(allWindowsRef, self);
            
    return [super initWithContentRect:contentRect styleMask:styleMask backing:bufferingType defer:deferCreation];
}

- (void)dealloc
{
    CFRange arrayRange = CFRangeMake(0, CFArrayGetCount(allWindowsRef));
    CFIndex i = CFArrayGetFirstIndexOfValue(allWindowsRef, arrayRange, self);
    assert(i != -1);

    CFArrayRemoveValueAtIndex(allWindowsRef, i);
    [super dealloc];
}

- (BOOL)isKeyWindow
{
    return layoutTestController ? layoutTestController->windowIsKey() : YES;
}

- (void)keyDown:(id)sender
{
    // Do nothing, avoiding the beep we'd otherwise get from NSResponder,
    // once we get to the end of the responder chain.
}

@end

@implementation DumpRenderTreeEvent

+ (NSPoint)mouseLocation
{
    return [[[mainFrame webView] window] convertBaseToScreen:lastMousePosition];
}

@end