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 "WebPDFRepresentation.h"
30
31#import "WebDataSourcePrivate.h"
32#import "WebFrame.h"
33#import "WebJSPDFDoc.h"
34#import "WebNSObjectExtras.h"
35#import "WebPDFDocumentExtras.h"
36#import "WebPDFView.h"
37#import "WebTypesInternal.h"
38#import <JavaScriptCore/Assertions.h>
39#import <JavaScriptCore/JSContextRef.h>
40#import <JavaScriptCore/JSStringRef.h>
41#import <JavaScriptCore/JSStringRefCF.h>
42
43@implementation WebPDFRepresentation
44
45+ (NSArray *)postScriptMIMETypes
46{
47    return [NSArray arrayWithObjects:
48        @"application/postscript",
49        nil];
50}
51
52+ (NSArray *)supportedMIMETypes
53{
54    return [[[self class] postScriptMIMETypes] arrayByAddingObjectsFromArray:
55        [NSArray arrayWithObjects:
56            @"text/pdf",
57            @"application/pdf",
58            nil]];
59}
60
61+ (Class)PDFDocumentClass
62{
63    static Class PDFDocumentClass = nil;
64    if (PDFDocumentClass == nil) {
65        PDFDocumentClass = [[WebPDFView PDFKitBundle] classNamed:@"PDFDocument"];
66        if (PDFDocumentClass == nil) {
67            LOG_ERROR("Couldn't find PDFDocument class in PDFKit.framework");
68        }
69    }
70    return PDFDocumentClass;
71}
72
73- (void)setDataSource:(WebDataSource *)dataSource
74{
75}
76
77- (void)receivedData:(NSData *)data withDataSource:(WebDataSource *)dataSource
78{
79}
80
81- (void)receivedError:(NSError *)error withDataSource:(WebDataSource *)dataSource
82{
83}
84
85- (NSData *)convertPostScriptDataSourceToPDF:(NSData *)data
86{
87    // Convert PostScript to PDF using Quartz 2D API
88    // http://developer.apple.com/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_ps_convert/chapter_16_section_1.html
89
90    CGPSConverterCallbacks callbacks = { 0, 0, 0, 0, 0, 0, 0, 0 };
91    CGPSConverterRef converter = CGPSConverterCreate(0, &callbacks, 0);
92    ASSERT(converter);
93
94    CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)data);
95    ASSERT(provider);
96
97    CFMutableDataRef result = CFDataCreateMutable(kCFAllocatorDefault, 0);
98    ASSERT(result);
99
100    CGDataConsumerRef consumer = CGDataConsumerCreateWithCFData(result);
101    ASSERT(consumer);
102
103    // Error handled by detecting zero-length 'result' in caller
104    CGPSConverterConvert(converter, provider, consumer, 0);
105
106    CFRelease(converter);
107    CFRelease(provider);
108    CFRelease(consumer);
109
110    return WebCFAutorelease(result);
111}
112
113- (void)finishedLoadingWithDataSource:(WebDataSource *)dataSource
114{
115    NSData *data = [dataSource data];
116
117    NSArray *postScriptMIMETypes = [[self class] postScriptMIMETypes];
118    NSString *mimeType = [dataSource _responseMIMEType];
119    if ([postScriptMIMETypes containsObject:mimeType]) {
120        data = [self convertPostScriptDataSourceToPDF:data];
121        if ([data length] == 0)
122            return;
123    }
124
125    WebPDFView *view = (WebPDFView *)[[[dataSource webFrame] frameView] documentView];
126    PDFDocument *doc = [[[[self class] PDFDocumentClass] alloc] initWithData:data];
127    [view setPDFDocument:doc];
128
129    NSArray *scripts = allScriptsInPDFDocument(doc);
130    [doc release];
131    doc = nil;
132
133    NSUInteger scriptCount = [scripts count];
134    if (!scriptCount)
135        return;
136
137    JSGlobalContextRef ctx = JSGlobalContextCreate(0);
138    JSObjectRef jsPDFDoc = makeJSPDFDoc(ctx, dataSource);
139
140    for (NSUInteger i = 0; i < scriptCount; ++i) {
141        JSStringRef script = JSStringCreateWithCFString((CFStringRef)[scripts objectAtIndex:i]);
142        JSEvaluateScript(ctx, script, jsPDFDoc, 0, 0, 0);
143        JSStringRelease(script);
144    }
145
146    JSGlobalContextRelease(ctx);
147}
148
149- (BOOL)canProvideDocumentSource
150{
151    return NO;
152}
153
154
155- (NSString *)documentSource
156{
157    return nil;
158}
159
160
161- (NSString *)title
162{
163    return nil;
164}
165
166@end
167