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 <JavaScriptCore/Assertions.h>

    30 #import <WebKit/WebDataSource.h>

    31 #import <WebKit/WebFrame.h>

    32 #import <WebKit/WebFrameView.h>

    33 #import <WebKit/WebNSObjectExtras.h>

    34 #import <WebKit/WebPDFRepresentation.h>

    35 #import <WebKit/WebPDFView.h>

    36 

    37 #import <PDFKit/PDFDocument.h>

    38 

    39 @implementation WebPDFRepresentation

    40 

    41 + (NSArray *)postScriptMIMETypes

    42 {

    43     return [NSArray arrayWithObjects:

    44         @"application/postscript",

    45         nil];

    46 }

    47 

    48 + (NSArray *)supportedMIMETypes

    49 {

    50     return [[[self class] postScriptMIMETypes] arrayByAddingObjectsFromArray:

    51         [NSArray arrayWithObjects:

    52             @"text/pdf",

    53             @"application/pdf",

    54             nil]];

    55 }

    56 

    57 + (Class)PDFDocumentClass

    58 {

    59     static Class PDFDocumentClass = nil;

    60     if (PDFDocumentClass == nil) {

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

    62         if (PDFDocumentClass == nil) {

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

    64         }

    65     }

    66     return PDFDocumentClass;

    67 }

    68 

    69 - (void)setDataSource:(WebDataSource *)dataSource;

    70 {

    71 }

    72 

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

    74 {

    75 }

    76 

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

    78 {

    79 }

    80 

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

    82 {

    83     // Convert PostScript to PDF using Quartz 2D API

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

    85 

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

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

    88     ASSERT(converter);

    89 

    90     CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)data);

    91     ASSERT(provider);

    92 

    93     CFMutableDataRef result = CFDataCreateMutable(kCFAllocatorDefault, 0);

    94     ASSERT(result);

    95 

    96     CGDataConsumerRef consumer = CGDataConsumerCreateWithCFData(result);

    97     ASSERT(consumer);

    98 

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

   100     CGPSConverterConvert(converter, provider, consumer, 0);

   101 

   102     CFRelease(converter);

   103     CFRelease(provider);

   104     CFRelease(consumer);

   105 

   106     return WebCFAutorelease(result);

   107 }

   108 

   109 - (void)finishedLoadingWithDataSource:(WebDataSource *)dataSource

   110 {

   111     NSData *data = [dataSource data];

   112 

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

   114     NSString *mimeType = [[dataSource response] MIMEType];

   115     if ([postScriptMIMETypes containsObject:mimeType]) {

   116         data = [self convertPostScriptDataSourceToPDF:data];

   117         if ([data length] == 0)

   118             return;

   119     }

   120 

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

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

   123     [view setPDFDocument:doc];

   124     [doc release];

   125 }

   126 

   127 

   128 - (BOOL)canProvideDocumentSource

   129 {

   130     return NO;

   131 }

   132 

   133 

   134 - (NSString *)documentSource

   135 {

   136     return nil;

   137 }

   138 

   139 

   140 - (NSString *)title

   141 {

   142     return nil;

   143 }

   144 

   145 @end