Tools/TestRunnerShared/cocoa/PlatformViewHelpers.mm

/*
 * Copyright (C) 2019 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 "PlatformViewHelpers.h"

#import <wtf/RetainPtr.h>
#if PLATFORM(IOS_FAMILY)
#import <UIKit/UIKit.h>
#else
#import <AppKit/AppKit.h>
#endif

BOOL forEachViewInHierarchy(PlatformView *view, void(^mapFunction)(PlatformView *subview, BOOL *stop))
{
    BOOL stop = NO;
    mapFunction(view, &stop);
    if (stop)
        return YES;

    for (PlatformView *subview in view.subviews) {
        stop = forEachViewInHierarchy(subview, mapFunction);
        if (stop)
            break;
    }
    return stop;
}

NSArray<PlatformView *> *findAllViewsInHierarchyOfType(PlatformView *view, Class viewClass)
{
    __block RetainPtr<NSMutableArray> views = adoptNS([[NSMutableArray alloc] init]);
    forEachViewInHierarchy(view, ^(PlatformView *subview, BOOL *stop) {
        if ([subview isKindOfClass:viewClass])
            [views addObject:subview];
    });
    return views.autorelease();
}