1/*
2 * Copyright (C) 2012 Apple 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 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#import "config.h"
27#import "UTIUtilities.h"
28
29#if PLATFORM(IOS)
30#import "SoftLinking.h"
31#import <MobileCoreServices/MobileCoreServices.h>
32
33SOFT_LINK_FRAMEWORK(MobileCoreServices)
34
35SOFT_LINK(MobileCoreServices, UTTypeCopyDeclaration, CFDictionaryRef, (CFStringRef inUTI), (inUTI))
36SOFT_LINK(MobileCoreServices, UTTypeCopyPreferredTagWithClass, CFStringRef, (CFStringRef inUTI, CFStringRef inTagClass), (inUTI, inTagClass))
37SOFT_LINK(MobileCoreServices, UTTypeCreatePreferredIdentifierForTag, CFStringRef, (CFStringRef inTagClass, CFStringRef inTag, CFStringRef inConformingToUTI), (inTagClass, inTag, inConformingToUTI))
38
39SOFT_LINK_CONSTANT(MobileCoreServices, kUTTypeConformsToKey, CFStringRef)
40SOFT_LINK_CONSTANT(MobileCoreServices, kUTTagClassMIMEType, CFStringRef)
41
42#define kUTTagClassMIMEType getkUTTagClassMIMEType()
43#define kUTTypeConformsToKey getkUTTypeConformsToKey()
44#endif
45
46namespace WebCore {
47
48RetainPtr<CFStringRef> mimeTypeFromUTITree(CFStringRef uti)
49{
50    // Check if this UTI has a MIME type.
51    RetainPtr<CFStringRef> mimeType = adoptCF(UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType));
52    if (mimeType)
53        return mimeType.get();
54
55    // If not, walk the ancestory of this UTI via its "ConformsTo" tags and return the first MIME type we find.
56    RetainPtr<CFDictionaryRef> decl = adoptCF(UTTypeCopyDeclaration(uti));
57    if (!decl)
58        return nil;
59    CFTypeRef value = CFDictionaryGetValue(decl.get(), kUTTypeConformsToKey);
60    if (!value)
61        return nil;
62    CFTypeID typeID = CFGetTypeID(value);
63
64    if (typeID == CFStringGetTypeID())
65        return mimeTypeFromUTITree((CFStringRef)value);
66
67    if (typeID == CFArrayGetTypeID()) {
68        CFArrayRef newTypes = (CFArrayRef)value;
69        CFIndex count = CFArrayGetCount(newTypes);
70        for (CFIndex i = 0; i < count; ++i) {
71        CFTypeRef object = CFArrayGetValueAtIndex(newTypes, i);
72        if (CFGetTypeID(object) != CFStringGetTypeID())
73            continue;
74
75        if (RetainPtr<CFStringRef> mimeType = mimeTypeFromUTITree((CFStringRef)object))
76            return mimeType;
77        }
78    }
79
80    return nil;
81}
82
83RetainPtr<CFStringRef> UTIFromMIMEType(CFStringRef mime)
84{
85    RetainPtr<CFStringRef> uti = adoptCF(UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mime, 0));
86    return uti;
87}
88
89}
90