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+//
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+// FLEXWindowManagerController.m
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+// FLEX
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+//
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+// Created by Tanner on 2/6/20.
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+// Copyright © 2020 Flipboard. All rights reserved.
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+//
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+
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+#import "FLEXWindowManagerController.h"
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+#import "FLEXManager+Private.h"
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+#import "FLEXUtility.h"
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+
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+@interface FLEXWindowManagerController ()
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+@property (nonatomic) UIWindow *keyWindow;
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+@property (nonatomic, copy) NSString *keyWindowSubtitle;
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+@property (nonatomic, copy) NSArray<UIWindow *> *windows;
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+@property (nonatomic, copy) NSArray<NSString *> *windowSubtitles;
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+@property (nonatomic, copy) NSArray<UIScene *> *scenes API_AVAILABLE(ios(13));
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+@property (nonatomic, copy) NSArray<NSString *> *sceneSubtitles;
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+@end
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+
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+@implementation FLEXWindowManagerController
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+
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+#pragma mark - Initialization
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+
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+- (id)init {
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+ return [self initWithStyle:UITableViewStylePlain];
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+}
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+
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+- (void)viewDidLoad {
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+ [super viewDidLoad];
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+
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+ self.title = @"Windows";
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+ if (@available(iOS 13, *)) {
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+ self.title = @"Windows and Scenes";
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+ }
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+
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+ [self disableToolbar];
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+ self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]
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+ initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(dismissAnimated)
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+ ];
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+
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+ [self reloadData];
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+}
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+
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+
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+#pragma mark - Private
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+
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+- (void)reloadData {
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+ self.keyWindow = UIApplication.sharedApplication.keyWindow;
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+ self.windows = UIApplication.sharedApplication.windows;
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+ self.windowSubtitles = [self.windows flex_mapped:^id(UIWindow *window, NSUInteger idx) {
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+ return [NSString stringWithFormat:@"Level: %@ — Root: %@",
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+ @(window.windowLevel), window.rootViewController
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+ ];
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+ }];
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+ self.keyWindowSubtitle = self.windowSubtitles[[self.windows indexOfObject:self.keyWindow]];
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+ if (@available(iOS 13, *)) {
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+ self.scenes = UIApplication.sharedApplication.connectedScenes.allObjects;
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+ self.sceneSubtitles = [self.scenes flex_mapped:^id(UIScene *scene, NSUInteger idx) {
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+ return [self sceneDescription:scene];
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+ }];
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+ }
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+}
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+
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+- (void)dismissAnimated {
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+ [self dismissViewControllerAnimated:YES completion:nil];
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+}
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+
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+- (void)showRevertOrDismissAlert:(void(^)())revertBlock {
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+ [self.tableView deselectRowAtIndexPath:self.tableView.indexPathForSelectedRow animated:YES];
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+ [self reloadData];
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+ [self.tableView reloadData];
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+
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+ UIWindow *highestWindow = UIApplication.sharedApplication.keyWindow;
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+ UIWindowLevel maxLevel = 0;
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+ for (UIWindow *window in UIApplication.sharedApplication.windows) {
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+ if (window.windowLevel > maxLevel) {
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+ maxLevel = window.windowLevel;
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+ highestWindow = window;
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+ }
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+ }
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+
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+ [FLEXAlert makeAlert:^(FLEXAlert *make) {
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+ make.title(@"Keep Changes?");
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+ make.message(@"If you do not wish to keep these settings, choose 'Revert Changes' below.");
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+
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+ make.button(@"Keep Changes").destructiveStyle();
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+ make.button(@"Keep Changes and Dismiss").destructiveStyle().handler(^(NSArray<NSString *> *strings) {
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+ [self dismissAnimated];
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+ });
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+ make.button(@"Revert Changes").cancelStyle().handler(^(NSArray<NSString *> *strings) {
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+ revertBlock();
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+ [self reloadData];
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+ [self.tableView reloadData];
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+ });
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+ } showFrom:[FLEXUtility topViewControllerInWindow:highestWindow]];
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+}
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+
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+- (NSString *)sceneDescription:(UIScene *)scene API_AVAILABLE(ios(13)) {
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+ NSString *state = [self stringFromSceneState:scene.activationState];
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+ NSString *title = scene.title.length ? scene.title : nil;
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+ NSString *suffix = nil;
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+
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+ if ([scene isKindOfClass:[UIWindowScene class]]) {
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+ UIWindowScene *windowScene = (id)scene;
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+ suffix = FLEXPluralString(windowScene.windows.count, @"windows", @"window");
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+ }
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+
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+ NSMutableString *description = state.mutableCopy;
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+ if (title) {
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+ [description appendFormat:@" — %@", title];
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+ }
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+ if (suffix) {
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+ [description appendFormat:@" — %@", suffix];
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+ }
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+
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+ return description.copy;
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+}
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+
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+- (NSString *)stringFromSceneState:(UISceneActivationState)state API_AVAILABLE(ios(13)) {
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+ switch (state) {
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+ case UISceneActivationStateUnattached:
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+ return @"Unattached";
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+ case UISceneActivationStateForegroundActive:
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+ return @"Active";
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+ case UISceneActivationStateForegroundInactive:
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+ return @"Inactive";
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+ case UISceneActivationStateBackground:
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+ return @"Backgrounded";
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+ }
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+
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+ return [NSString stringWithFormat:@"Unknown state: %@", @(state)];
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+}
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+
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+
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+#pragma mark - Table View Data Source
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+
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+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
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+ if (@available(iOS 13, *)) {
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+ return 3;
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+ }
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+
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+ return 2;
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+}
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+
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+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
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+ switch (section) {
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+ case 0:
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+ return 1;
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+ case 1:
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+ return self.windows.count;
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+ case 2:
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+ if (@available(iOS 13, *)) {
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+ return self.scenes.count;
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+ }
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+ }
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+
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+ @throw NSInternalInconsistencyException;
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+ return 0;
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+}
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+
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+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
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+ switch (section) {
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+ case 0: return @"Key Window";
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+ case 1: return @"Windows";
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+ case 2: return @"Connected Scenes";
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+ }
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+
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+ return nil;
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+}
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+
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+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
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+ UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kFLEXDetailCell forIndexPath:indexPath];
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+ UIWindow *window = nil;
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+ NSString *subtitle = nil;
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+
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+ switch (indexPath.section) {
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+ case 0:
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+ window = self.keyWindow;
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+ subtitle = self.keyWindowSubtitle;
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+ break;
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+ case 1:
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+ window = self.windows[indexPath.row];
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+ subtitle = self.windowSubtitles[indexPath.row];
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+ break;
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+ case 2:
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+ if (@available(iOS 13, *)) {
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+ UIScene *scene = self.scenes[indexPath.row];
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+ cell.textLabel.text = scene.description;
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+ cell.detailTextLabel.text = self.sceneSubtitles[indexPath.row];
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+ return cell;
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+ }
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+ }
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+
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+ cell.textLabel.text = window.description;
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+ cell.detailTextLabel.text = [NSString
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+ stringWithFormat:@"Level: %@ — Root: %@", @(window.windowLevel), window.rootViewController
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+ ];
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+
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+ return cell;
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+}
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+
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+
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+#pragma mark - Table View Delegate
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+
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+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
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+ UIWindow *window = nil;
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+ NSString *subtitle = nil;
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+ FLEXWindow *flex = FLEXManager.sharedManager.explorerWindow;
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+
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+ id cancelHandler = ^{
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+ [self.tableView deselectRowAtIndexPath:self.tableView.indexPathForSelectedRow animated:YES];
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+ };
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+
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+ switch (indexPath.section) {
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+ case 0:
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+ window = self.keyWindow;
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+ subtitle = self.keyWindowSubtitle;
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+ break;
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+ case 1:
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+ window = self.windows[indexPath.row];
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+ subtitle = self.windowSubtitles[indexPath.row];
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+ break;
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+ case 2:
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+ if (@available(iOS 13, *)) {
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+ UIScene *scene = self.scenes[indexPath.row];
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+ UIWindowScene *oldScene = flex.windowScene;
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+ BOOL isWindowScene = [scene isKindOfClass:[UIWindowScene class]];
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+ BOOL isFLEXScene = isWindowScene ? flex.windowScene == scene : NO;
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+
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+ [FLEXAlert makeAlert:^(FLEXAlert *make) {
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+ make.title(NSStringFromClass(scene.class));
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+
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+ if (isWindowScene) {
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+ if (isFLEXScene) {
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+ make.message(@"Already the FLEX window scene");
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+ }
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+
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+ make.button(@"Set as FLEX Window Scene")
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+ .handler(^(NSArray<NSString *> *strings) {
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+ flex.windowScene = (id)scene;
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+ [self showRevertOrDismissAlert:^{
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+ flex.windowScene = oldScene;
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+ }];
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+ }).enabled(!isFLEXScene);
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+ make.button(@"Cancel").cancelStyle();
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+ } else {
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+ make.message(@"Not a UIWindowScene");
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+ make.button(@"Dismiss").cancelStyle().handler(cancelHandler);
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+ }
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+ } showFrom:self];
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+ }
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+ }
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+
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+ __block UIWindow *targetWindow = nil, *oldKeyWindow = nil;
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+ __block UIWindowLevel oldLevel;
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+ __block BOOL wasVisible;
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+
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+ subtitle = [subtitle stringByAppendingString:
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+ @"\n\n1) Adjust the FLEX window level relative to this window,\n"
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+ "2) adjust this window's level relative to the FLEX window,\n"
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+ "3) set this window's level to a specific value, or\n"
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+ "4) make this window the key window if it isn't already."
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+ ];
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+
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+ [FLEXAlert makeAlert:^(FLEXAlert *make) {
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+ make.title(NSStringFromClass(window.class)).message(subtitle);
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+ make.button(@"Adjust FLEX Window Level").handler(^(NSArray<NSString *> *strings) {
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+ targetWindow = flex; oldLevel = flex.windowLevel;
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+ flex.windowLevel = window.windowLevel + strings.firstObject.integerValue;
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+
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+ [self showRevertOrDismissAlert:^{ targetWindow.windowLevel = oldLevel; }];
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+ });
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+ make.button(@"Adjust This Window's Level").handler(^(NSArray<NSString *> *strings) {
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+ targetWindow = window; oldLevel = window.windowLevel;
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+ window.windowLevel = flex.windowLevel + strings.firstObject.integerValue;
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+
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+ [self showRevertOrDismissAlert:^{ targetWindow.windowLevel = oldLevel; }];
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+ });
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+ make.button(@"Set This Window's Level").handler(^(NSArray<NSString *> *strings) {
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+ targetWindow = window; oldLevel = window.windowLevel;
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+ window.windowLevel = strings.firstObject.integerValue;
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+
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+ [self showRevertOrDismissAlert:^{ targetWindow.windowLevel = oldLevel; }];
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+ });
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+ make.button(@"Make Key And Visible").handler(^(NSArray<NSString *> *strings) {
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+ oldKeyWindow = UIApplication.sharedApplication.keyWindow;
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+ wasVisible = window.hidden;
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+ [window makeKeyAndVisible];
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+
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+ [self showRevertOrDismissAlert:^{
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+ window.hidden = wasVisible;
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+ [oldKeyWindow makeKeyWindow];
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+ }];
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+ }).enabled(!window.isKeyWindow && !window.hidden);
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+ make.button(@"Cancel").cancelStyle().handler(cancelHandler);
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+
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+ make.textField(@"+/- window level, i.e. 5 or -10");
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+ } showFrom:self];
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+}
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+
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+@end
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Tanner Bennett