1/* 2 * Copyright (C) 2011 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 * 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. 12 * 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. 24 */ 25 26#import "config.h" 27#import "WKFullKeyboardAccessWatcher.h" 28 29#import "WebContext.h" 30 31NSString * const KeyboardUIModeDidChangeNotification = @"com.apple.KeyboardUIModeDidChange"; 32const CFStringRef AppleKeyboardUIMode = CFSTR("AppleKeyboardUIMode"); 33const CFStringRef UniversalAccessDomain = CFSTR("com.apple.universalaccess"); 34 35using namespace WebKit; 36 37@implementation WKFullKeyboardAccessWatcher 38 39- (void)notifyAllWebContexts 40{ 41 const Vector<WebContext*>& contexts = WebContext::allContexts(); 42 for (size_t i = 0; i < contexts.size(); ++i) 43 contexts[i]->fullKeyboardAccessModeChanged(fullKeyboardAccessEnabled); 44} 45 46- (void)retrieveKeyboardUIModeFromPreferences:(NSNotification *)notification 47{ 48 BOOL oldValue = fullKeyboardAccessEnabled; 49 50 CFPreferencesAppSynchronize(UniversalAccessDomain); 51 52 Boolean keyExistsAndHasValidFormat; 53 int mode = CFPreferencesGetAppIntegerValue(AppleKeyboardUIMode, UniversalAccessDomain, &keyExistsAndHasValidFormat); 54 if (keyExistsAndHasValidFormat) { 55 // The keyboard access mode is reported by two bits: 56 // Bit 0 is set if feature is on 57 // Bit 1 is set if full keyboard access works for any control, not just text boxes and lists. 58 fullKeyboardAccessEnabled = (mode & 0x2); 59 } 60 61 if (fullKeyboardAccessEnabled != oldValue) 62 [self notifyAllWebContexts]; 63} 64 65- (id)init 66{ 67 self = [super init]; 68 if (!self) 69 return nil; 70 71 [self retrieveKeyboardUIModeFromPreferences:nil]; 72 73 [[NSDistributedNotificationCenter defaultCenter] 74 addObserver:self selector:@selector(retrieveKeyboardUIModeFromPreferences:) 75 name:KeyboardUIModeDidChangeNotification object:nil]; 76 77 return self; 78} 79 80+ (BOOL)fullKeyboardAccessEnabled 81{ 82 static WKFullKeyboardAccessWatcher *watcher = [[WKFullKeyboardAccessWatcher alloc] init]; 83 return watcher->fullKeyboardAccessEnabled; 84} 85 86@end 87