/*

 * Copyright (C) 2005, 2006 Apple Computer, 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 "WebPDFRepresentation.h"

#import "WebDataSourcePrivate.h"

#import "WebFrame.h"

#import "WebJSPDFDoc.h"

#import "WebNSObjectExtras.h"

#import "WebPDFDocumentExtras.h"

#import "WebPDFView.h"

#import "WebTypesInternal.h"

#import <JavaScriptCore/Assertions.h>

#import <JavaScriptCore/JSContextRef.h>

#import <JavaScriptCore/JSStringRef.h>

#import <JavaScriptCore/JSStringRefCF.h>

@implementation WebPDFRepresentation

+ (NSArray *)postScriptMIMETypes

{

    return [NSArray arrayWithObjects:

        @"application/postscript",

        nil];

}

+ (NSArray *)supportedMIMETypes

{

    return [[[self class] postScriptMIMETypes] arrayByAddingObjectsFromArray:

        [NSArray arrayWithObjects:

            @"text/pdf",

            @"application/pdf",

            nil]];

}

+ (Class)PDFDocumentClass

{

    static Class PDFDocumentClass = nil;

    if (PDFDocumentClass == nil) {

        PDFDocumentClass = [[WebPDFView PDFKitBundle] classNamed:@"PDFDocument"];

        if (PDFDocumentClass == nil) {

            LOG_ERROR("Couldn't find PDFDocument class in PDFKit.framework");

        }

    }

    return PDFDocumentClass;

}

- (void)setDataSource:(WebDataSource *)dataSource

{

}

- (void)receivedData:(NSData *)data withDataSource:(WebDataSource *)dataSource

{

}

- (void)receivedError:(NSError *)error withDataSource:(WebDataSource *)dataSource

{

}

- (NSData *)convertPostScriptDataSourceToPDF:(NSData *)data

{

    // Convert PostScript to PDF using Quartz 2D API

    // http://developer.apple.com/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_ps_convert/chapter_16_section_1.html

    CGPSConverterCallbacks callbacks = { 0, 0, 0, 0, 0, 0, 0, 0 };    

    CGPSConverterRef converter = CGPSConverterCreate(0, &callbacks, 0);

    ASSERT(converter);

    CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)data);

    ASSERT(provider);

    CFMutableDataRef result = CFDataCreateMutable(kCFAllocatorDefault, 0);

    ASSERT(result);

    CGDataConsumerRef consumer = CGDataConsumerCreateWithCFData(result);

    ASSERT(consumer);

    // Error handled by detecting zero-length 'result' in caller

    CGPSConverterConvert(converter, provider, consumer, 0);

    CFRelease(converter);

    CFRelease(provider);

    CFRelease(consumer);

    return WebCFAutorelease(result);

}

- (void)finishedLoadingWithDataSource:(WebDataSource *)dataSource

{

    NSData *data = [dataSource data];

    NSArray *postScriptMIMETypes = [[self class] postScriptMIMETypes];

    NSString *mimeType = [dataSource _responseMIMEType];

    if ([postScriptMIMETypes containsObject:mimeType]) {

        data = [self convertPostScriptDataSourceToPDF:data];

        if ([data length] == 0)

            return;

    }

    WebPDFView *view = (WebPDFView *)[[[dataSource webFrame] frameView] documentView];

    PDFDocument *doc = [[[[self class] PDFDocumentClass] alloc] initWithData:data];

    [view setPDFDocument:doc];

    NSArray *scripts = allScriptsInPDFDocument(doc);

    [doc release];

    doc = nil;

    NSUInteger scriptCount = [scripts count];

    if (!scriptCount)

        return;

    JSGlobalContextRef ctx = JSGlobalContextCreate(0);

    JSObjectRef jsPDFDoc = makeJSPDFDoc(ctx, dataSource);

    for (NSUInteger i = 0; i < scriptCount; ++i) {

        JSStringRef script = JSStringCreateWithCFString((CFStringRef)[scripts objectAtIndex:i]);

        JSEvaluateScript(ctx, script, jsPDFDoc, 0, 0, 0);

        JSStringRelease(script);

    }

    JSGlobalContextRelease(ctx);

}

- (BOOL)canProvideDocumentSource

{

    return NO;

}

- (NSString *)documentSource

{

    return nil;

}

- (NSString *)title

{

    return nil;

}

@end