WebPreferencesDefaultValuesCocoa.mm   [plain text]

/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/

#import "config.h"
#import "WebPreferencesDefaultValues.h"

#if PLATFORM(COCOA) && HAVE(SYSTEM_FEATURE_FLAGS)

#import <Foundation/NSBundle.h>

#import <pal/spi/cocoa/FeatureFlagsSPI.h>
#import <wtf/RetainPtr.h>
#import <wtf/cocoa/RuntimeApplicationChecksCocoa.h>
#import <wtf/text/WTFString.h>

namespace WebKit {

// Because of <rdar://problem/60608008>, WebKit has to parse the feature flags plist file
bool isFeatureFlagEnabled(const String& featureName)
{
    BOOL isWebKitBundleFromStagedFramework = [[[NSBundle mainBundle] bundlePath] hasPrefix:@"/Library/Apple/System/Library/StagedFrameworks/WebKit"];

    if (!isWebKitBundleFromStagedFramework)
        return _os_feature_enabled_impl("WebKit", (const char*)featureName.utf8().data());

    static NSDictionary* dictionary = [[NSDictionary dictionaryWithContentsOfFile:@"/Library/Apple/System/Library/FeatureFlags/Domain/WebKit.plist"] retain];

    if (![[dictionary objectForKey:featureName] objectForKey:@"Enabled"])
        return _os_feature_enabled_impl("WebKit", (const char*)featureName.characters8());

    return [[[dictionary objectForKey:featureName] objectForKey:@"Enabled"] isKindOfClass:[NSNumber class]] && [[[dictionary objectForKey:featureName] objectForKey:@"Enabled"] boolValue];
}

} // namespace WebKit

#endif