google/EarlGrey

//
// Copyright 2016 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#import "Provider/GREYUIWindowProvider.h"

#import "Assertion/GREYAssertionDefines.h"
#import "Common/GREYAppleInternals.h"
#import "Common/GREYConfiguration.h"
#import "Common/GREYDefines.h"
#import "Common/GREYFatalAsserts.h"

@implementation GREYUIWindowProvider {
  NSArray *_windows;
}

+ (instancetype)providerWithWindows:(NSArray *)windows {
  return [[GREYUIWindowProvider alloc] initWithWindows:windows];
}

+ (instancetype)providerWithAllWindows {
  return [[GREYUIWindowProvider alloc] initWithAllWindows];
}

- (instancetype)initWithWindows:(NSArray *)windows {
  self = [super init];
  if (self) {
    _windows = [windows copy];
  }
  return self;
}

- (instancetype)initWithAllWindows {
  return [self initWithWindows:nil];
}

- (NSEnumerator *)dataEnumerator {
  GREYFatalAssertMainThread();

  if (_windows) {
    return [_windows objectEnumerator];
  } else {
    return [[[self class] allWindows] objectEnumerator];
  }
}

+ (NSArray *)allWindows {
  UIApplication *sharedApp = UIApplication.sharedApplication;
  NSMutableOrderedSet *windows = [[NSMutableOrderedSet alloc] init];
  if (sharedApp.windows) {
    [windows addObjectsFromArray:sharedApp.windows];
  }

  if ([sharedApp.delegate respondsToSelector:@selector(window)] && sharedApp.delegate.window) {
    [windows addObject:sharedApp.delegate.window];
  }

  if (sharedApp.keyWindow) {
    [windows addObject:sharedApp.keyWindow];
  }

  BOOL includeStatusBarWindow = GREY_CONFIG_BOOL(kGREYConfigKeyIncludeStatusBarWindow);
  if (includeStatusBarWindow && sharedApp.statusBarWindow) {
    [windows addObject:sharedApp.statusBarWindow];
  }

  // After sorting, reverse the windows because they need to appear from top-most to bottom-most.
  return [[windows sortedArrayWithOptions:NSSortStable
                          usingComparator:^NSComparisonResult (id obj1, id obj2) {
    if ([obj1 windowLevel] < [obj2 windowLevel]) {
      return -1;
    } else if ([obj1 windowLevel] == [obj2 windowLevel]) {
      return 0;
    } else {
      return 1;
    }
  }] reverseObjectEnumerator].allObjects;
}

@end