2 * Copyright (C) 2003, 2005, 2006, 2010 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
29 #import "BlockExceptions.h"
30 #import "WebCoreSystemInterface.h"
31 #import <wtf/Assertions.h>
32 #import <wtf/MainThread.h>
33 #import <wtf/text/WTFString.h>
35 using namespace WebCore;
37 static NSString *preferredLanguageCode;
39 @interface LanguageChangeObserver : NSObject {
43 @implementation LanguageChangeObserver
45 + (void)_webkit_languagePreferencesDidChange
47 ASSERT(isMainThread());
49 [preferredLanguageCode release];
50 preferredLanguageCode = nil;
59 static NSString *createHTTPStyleLanguageCode(NSString *languageCode)
61 ASSERT(isMainThread());
63 // Look up the language code using CFBundle.
64 CFStringRef preferredLanguageCode = wkCopyCFLocalizationPreferredName((CFStringRef)languageCode);
66 if (preferredLanguageCode)
67 languageCode = (NSString *)preferredLanguageCode;
69 // Make the string lowercase.
70 NSString *lowercaseLanguageCode = [languageCode lowercaseString];
72 NSString *httpStyleLanguageCode;
74 // Turn a '_' into a '-' if it appears after a 2-letter language code.
75 if ([lowercaseLanguageCode length] >= 3 && [lowercaseLanguageCode characterAtIndex:2] == '_') {
76 NSMutableString *mutableLanguageCode = [lowercaseLanguageCode mutableCopy];
77 [mutableLanguageCode replaceCharactersInRange:NSMakeRange(2, 1) withString:@"-"];
78 httpStyleLanguageCode = mutableLanguageCode;
80 httpStyleLanguageCode = [lowercaseLanguageCode retain];
82 if (preferredLanguageCode)
83 CFRelease(preferredLanguageCode);
85 return httpStyleLanguageCode;
88 String platformDefaultLanguage()
90 ASSERT(isMainThread());
92 BEGIN_BLOCK_OBJC_EXCEPTIONS;
94 if (!preferredLanguageCode) {
95 [[NSUserDefaults standardUserDefaults] synchronize];
96 NSArray *languages = [[NSUserDefaults standardUserDefaults] stringArrayForKey:@"AppleLanguages"];
97 if (![languages count])
98 preferredLanguageCode = @"en";
100 preferredLanguageCode = createHTTPStyleLanguageCode([languages objectAtIndex:0]);
103 NSString *code = [[preferredLanguageCode retain] autorelease];
105 static bool languageChangeObserverAdded;
106 if (!languageChangeObserverAdded) {
107 [[NSDistributedNotificationCenter defaultCenter] addObserver:[LanguageChangeObserver self]
108 selector:@selector(_webkit_languagePreferencesDidChange)
109 name:@"AppleLanguagePreferencesChangedNotification"
111 languageChangeObserverAdded = true;
116 END_BLOCK_OBJC_EXCEPTIONS;