/*

 * Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.

 *

 * 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 "WebResourceInternal.h"

#import "WebFrameInternal.h"

#import "WebKitLogging.h"

#import "WebKitVersionChecks.h"

#import "WebNSDictionaryExtras.h"

#import "WebNSObjectExtras.h"

#import "WebNSURLExtras.h"

#import <JavaScriptCore/InitializeThreading.h>

#import <JavaScriptCore/PassRefPtr.h>

#import <WebCore/ArchiveResource.h>

#import <WebCore/LegacyWebArchive.h>

#import <WebCore/RuntimeApplicationChecks.h>

#import <WebCore/TextEncoding.h>

#import <WebCore/ThreadCheck.h>

#import <WebCore/WebCoreObjCExtras.h>

#import <WebCore/WebCoreURLResponse.h>

#import <wtf/Threading.h>

using namespace WebCore;

static NSString * const WebResourceDataKey =              @"WebResourceData";

static NSString * const WebResourceFrameNameKey =         @"WebResourceFrameName";

static NSString * const WebResourceMIMETypeKey =          @"WebResourceMIMEType";

static NSString * const WebResourceURLKey =               @"WebResourceURL";

static NSString * const WebResourceTextEncodingNameKey =  @"WebResourceTextEncodingName";

static NSString * const WebResourceResponseKey =          @"WebResourceResponse";

@interface WebResourcePrivate : NSObject {

@public

    ArchiveResource* coreResource;

}

- (id)initWithCoreResource:(PassRefPtr<ArchiveResource>)coreResource;

@end

@implementation WebResourcePrivate

+ (void)initialize

{

    JSC::initializeThreading();

    WTF::initializeMainThreadToProcessMainThread();

#ifndef BUILDING_ON_TIGER

    WebCoreObjCFinalizeOnMainThread(self);

#endif

}

- (id)init

{

    return [super init];

}

- (id)initWithCoreResource:(PassRefPtr<ArchiveResource>)passedResource

{

    self = [super init];

    if (!self)

        return nil;

    // Acquire the PassRefPtr<>'s ref as our own manual ref

    coreResource = passedResource.releaseRef();

    return self;

}

- (void)dealloc

{

    if (WebCoreObjCScheduleDeallocateOnMainThread([WebResourcePrivate class], self))

        return;

    if (coreResource)

        coreResource->deref();

    [super dealloc];

}

- (void)finalize

{

    if (coreResource)

        coreResource->deref();

    [super finalize];

}

@end

@implementation WebResource

- (id)init

{

    self = [super init];

    if (!self)

        return nil;

    _private = [[WebResourcePrivate alloc] init];

    return self;

}

- (id)initWithData:(NSData *)data URL:(NSURL *)URL MIMEType:(NSString *)MIMEType textEncodingName:(NSString *)textEncodingName frameName:(NSString *)frameName

{

    return [self _initWithData:data URL:URL MIMEType:MIMEType textEncodingName:textEncodingName frameName:frameName response:nil copyData:YES];

}

- (id)initWithCoder:(NSCoder *)decoder

{

    WebCoreThreadViolationCheckRoundTwo();

    self = [super init];

    if (!self)

        return nil;

    NSData *data = nil;

    NSURL *url = nil;

    NSString *mimeType = nil, *textEncoding = nil, *frameName = nil;

    NSURLResponse *response = nil;

    @try {

        id object = [decoder decodeObjectForKey:WebResourceDataKey];

        if ([object isKindOfClass:[NSData class]])

            data = object;

        object = [decoder decodeObjectForKey:WebResourceURLKey];

        if ([object isKindOfClass:[NSURL class]])

            url = object;

        object = [decoder decodeObjectForKey:WebResourceMIMETypeKey];

        if ([object isKindOfClass:[NSString class]])

            mimeType = object;

        object = [decoder decodeObjectForKey:WebResourceTextEncodingNameKey];

        if ([object isKindOfClass:[NSString class]])

            textEncoding = object;

        object = [decoder decodeObjectForKey:WebResourceFrameNameKey];

        if ([object isKindOfClass:[NSString class]])

            frameName = object;

        object = [decoder decodeObjectForKey:WebResourceResponseKey];

        if ([object isKindOfClass:[NSURLResponse class]])

            response = object;

    } @catch(id) {

        [self release];

        return nil;

    }

    _private = [[WebResourcePrivate alloc] initWithCoreResource:ArchiveResource::create(SharedBuffer::wrapNSData(data), url, mimeType, textEncoding, frameName, response)];

    return self;

}

- (void)encodeWithCoder:(NSCoder *)encoder

{

    ArchiveResource *resource = _private->coreResource;

    NSData *data = nil;

    NSURL *url = nil;

    NSString *mimeType = nil, *textEncoding = nil, *frameName = nil;

    NSURLResponse *response = nil;

    if (resource) {

        if (resource->data())

            data = [resource->data()->createNSData() autorelease];

        url = resource->url();

        mimeType = resource->mimeType();

        textEncoding = resource->textEncoding();

        frameName = resource->frameName();

        response = resource->response().nsURLResponse();

    }

    [encoder encodeObject:data forKey:WebResourceDataKey];

    [encoder encodeObject:url forKey:WebResourceURLKey];

    [encoder encodeObject:mimeType forKey:WebResourceMIMETypeKey];

    [encoder encodeObject:textEncoding forKey:WebResourceTextEncodingNameKey];

    [encoder encodeObject:frameName forKey:WebResourceFrameNameKey];

    [encoder encodeObject:response forKey:WebResourceResponseKey];

}

- (void)dealloc

{

    [_private release];

    [super dealloc];

}

- (id)copyWithZone:(NSZone *)zone

{

    return [self retain];

}

- (NSData *)data

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] data];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    if (!_private->coreResource)

        return nil;

    if (!_private->coreResource->data())

        return nil;

    return [_private->coreResource->data()->createNSData() autorelease];

}

- (NSURL *)URL

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] URL];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    if (!_private->coreResource)

        return nil;

    NSURL *url = _private->coreResource->url();

    return url;

}

- (NSString *)MIMEType

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] MIMEType];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    if (!_private->coreResource)

        return nil;

    NSString *mimeType = _private->coreResource->mimeType();

    return mimeType;

}

- (NSString *)textEncodingName

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] textEncodingName];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    if (!_private->coreResource)

        return nil;

    NSString *textEncodingName = _private->coreResource->textEncoding();

    return textEncodingName;

}

- (NSString *)frameName

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] frameName];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    if (!_private->coreResource)

        return nil;

    NSString *frameName = _private->coreResource->frameName();

    return frameName;

}

- (NSString *)description

{

    return [NSString stringWithFormat:@"<%@ %@>", [self className], [self URL]];

}

@end

@implementation WebResource (WebResourceInternal)

- (id)_initWithCoreResource:(PassRefPtr<ArchiveResource>)coreResource

{

    self = [super init];

    if (!self)

        return nil;

    ASSERT(coreResource);

    // WebResources should not be init'ed with nil data, and doing so breaks certain uses of NSHTMLReader

    // See <rdar://problem/5820157> for more info

    if (!coreResource->data()) {

        [self release];

        return nil;

    }

    _private = [[WebResourcePrivate alloc] initWithCoreResource:coreResource];

    return self;

}

- (WebCore::ArchiveResource *)_coreResource

{

    return _private->coreResource;

}

@end

@implementation WebResource (WebResourcePrivate)

// SPI for Mail (5066325)

// FIXME: This "ignoreWhenUnarchiving" concept is an ugly one - can we find a cleaner solution for those who need this SPI?

- (void)_ignoreWhenUnarchiving

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround()) {

        [[self _webkit_invokeOnMainThread] _ignoreWhenUnarchiving];

        return;

    }

#endif

    WebCoreThreadViolationCheckRoundTwo();

    if (!_private->coreResource)

        return;

    _private->coreResource->ignoreWhenUnarchiving();

}

- (id)_initWithData:(NSData *)data 

                URL:(NSURL *)URL 

           MIMEType:(NSString *)MIMEType 

   textEncodingName:(NSString *)textEncodingName 

          frameName:(NSString *)frameName 

           response:(NSURLResponse *)response

           copyData:(BOOL)copyData

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] _initWithData:data URL:URL MIMEType:MIMEType textEncodingName:textEncodingName frameName:frameName response:response copyData:copyData];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    self = [super init];

    if (!self)

        return nil;

    if (!data || !URL || !MIMEType) {

        [self release];

        return nil;

    }

    _private = [[WebResourcePrivate alloc] initWithCoreResource:ArchiveResource::create(SharedBuffer::wrapNSData(copyData ? [[data copy] autorelease] : data), URL, MIMEType, textEncodingName, frameName, response)];

    return self;

}

- (id)_initWithData:(NSData *)data URL:(NSURL *)URL response:(NSURLResponse *)response

{

    // Pass NO for copyData since the data doesn't need to be copied since we know that callers will no longer modify it.

    // Copying it will also cause a performance regression.

    return [self _initWithData:data

                           URL:URL

                      MIMEType:[response MIMEType]

              textEncodingName:[response textEncodingName]

                     frameName:nil

                      response:response

                      copyData:NO];

}

- (NSString *)_suggestedFilename

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] _suggestedFilename];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    if (!_private->coreResource)

        return nil;

    NSString *suggestedFilename = _private->coreResource->response().suggestedFilename();

    return suggestedFilename;

}

- (NSFileWrapper *)_fileWrapperRepresentation

{

    NSFileWrapper *wrapper = [[[NSFileWrapper alloc] initRegularFileWithContents:[self data]] autorelease];

    NSString *filename = [self _suggestedFilename];

    if (!filename || ![filename length])

        filename = [[self URL] _webkit_suggestedFilenameWithMIMEType:[self MIMEType]];

    [wrapper setPreferredFilename:filename];

    return wrapper;

}

- (NSURLResponse *)_response

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] _response];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    NSURLResponse *response = nil;

    if (_private->coreResource)

        response = _private->coreResource->response().nsURLResponse();

    return response ? response : [[[NSURLResponse alloc] init] autorelease];        

}

- (NSString *)_stringValue

{

#ifdef MAIL_THREAD_WORKAROUND

    if (needMailThreadWorkaround())

        return [[self _webkit_invokeOnMainThread] _stringValue];

#endif

    WebCoreThreadViolationCheckRoundTwo();

    WebCore::TextEncoding encoding;

    if (_private->coreResource)

        encoding = _private->coreResource->textEncoding();

    if (!encoding.isValid())

        encoding = WindowsLatin1Encoding();

    SharedBuffer* coreData = _private->coreResource ? _private->coreResource->data() : 0;

    return encoding.decode(reinterpret_cast<const char*>(coreData ? coreData->data() : 0), coreData ? coreData->size() : 0);

}

@end

#ifdef MAIL_THREAD_WORKAROUND

static const double newMailBundleVersion = 1050.0;

@implementation WebResource (WebMailThreadWorkaround)

+ (BOOL)_needMailThreadWorkaroundIfCalledOffMainThread

{

    static BOOL isOldMail = applicationIsAppleMail() && [[[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString *)kCFBundleVersionKey] doubleValue] < newMailBundleVersion;

    return isOldMail;

}

@end

#endif