add support for dynamic theme update

VoidLink/HostCardView.h

@@ -28,6 +28,6 @@
 - (void)resizeBySizeFactor:(CGFloat)factor;
 - (id) initWithHost:(TemporaryHost*)host;
 - (id) initWithHost:(TemporaryHost*)host andSizeFactor:(CGFloat)sizeFactor;
+- (void)updateTheme;
 
 @end
-

VoidLink/HostCardView.m

@@ -431,7 +431,7 @@ static const float REFRESH_CYCLE = 2.0f;
     
     _size = CGSizeMake(_widthConstraint.constant, _heightConstraint.constant);
     
-    [self updateTheme:ThemeManager.userInterfaceStyle];
+    [self updateTheme];
 }
 
 - (void)createBackgroundLayer{
@@ -469,7 +469,7 @@ static const float REFRESH_CYCLE = 2.0f;
 }
 
 
-- (void)updateTheme:(UIUserInterfaceStyle)userIterfaceStyle{
+- (void)updateTheme {
     self.backgroundColor = [ThemeManager widgetBackgroundColor];
     _hostNameLabel.textColor = [ThemeManager textColor];
     [_appButton setTitleColor:[ThemeManager appPrimaryColor] forState:UIControlStateNormal];

VoidLink/ThemeManager.h

@@ -8,6 +8,8 @@
 
 #import <UIKit/UIKit.h>
 
+extern NSString * const ThemeDidChangeNotification;
+
 @interface ThemeManager:NSObject
 
 @property (class, nonatomic, assign) UIUserInterfaceStyle userInterfaceStyle;
@@ -23,4 +25,3 @@
 + (UIColor *)textTintColorWithAlpha;
 
 @end
-

VoidLink/ThemeManager.m

@@ -8,6 +8,8 @@
 
 #import "ThemeManager.h"
 
+NSString * const ThemeDidChangeNotification = @"ThemeDidChangeNotification";
+
 @implementation ThemeManager
 
 static UIUserInterfaceStyle _privateUserInterfaceStyle = UIUserInterfaceStyleUnspecified;
@@ -34,8 +36,12 @@ static UIUserInterfaceStyle _userInterfaceStyle;
 }
 
 + (void)setUserInterfaceStyle:(UIUserInterfaceStyle)style {
+    if (_userInterfaceStyle == style) {
+        return;
+    }
     _privateUserInterfaceStyle = style;
     [ThemeManager getUIStyle];
+    [[NSNotificationCenter defaultCenter] postNotificationName:ThemeDidChangeNotification object:nil];
 }
 
 + (UIColor *)appBackgroundColor {

VoidLink/ViewControllers/HostCollectionViewController.h

@@ -28,6 +28,7 @@
 /// 添加一个 item
 - (void)addHost:(TemporaryHost *)host;
 - (void)removeHost:(TemporaryHost *)host;
+- (void)updateTheme;
 
 /// 移除最后一个 item（如果有）
 - (void)removeLastItem;

VoidLink/ViewControllers/HostCollectionViewController.m

@@ -100,13 +100,28 @@ static const CGFloat cellOffsetY = 20;
     return self;
 }
 
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+- (void)updateTheme {
+    self.collectionView.backgroundColor = [ThemeManager appBackgroundColor];
+    for (HostCell *cell in [self.collectionView visibleCells]) {
+        [cell.cardView updateTheme];
+    }
+}
+
 - (void)viewDidLoad {
     [super viewDidLoad];
     [self.collectionView registerClass:[HostCell class] forCellWithReuseIdentifier:@"HostCell"];
     self.collectionView.alwaysBounceVertical = NO;
     self.collectionView.showsVerticalScrollIndicator = NO;
-    self.collectionView.backgroundColor = [ThemeManager appBackgroundColor];
     
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateTheme)
+                                                 name:ThemeDidChangeNotification
+                                               object:nil];
+    [self updateTheme];
 }
 
 

VoidLink/ViewControllers/MainFrameViewController.m

@@ -1481,10 +1481,45 @@ static NSMutableSet* hostList;
     [_upButton setAction:@selector(switchToHostView)];
 }
 
-- (void)viewDidLoad{
+- (void)updateTheme {
-    [ThemeManager setUserInterfaceStyle:UIScreen.mainScreen.traitCollection.userInterfaceStyle];
+    self.view.backgroundColor = [ThemeManager appBackgroundColor];
+    self.hostCollectionVC.view.backgroundColor = [ThemeManager appBackgroundColor];
+    self.collectionView.backgroundColor = [ThemeManager appBackgroundColor];
 
+    if (@available(iOS 13.0, *)) {
+        [navBarAppearanceStandard setValue:[ThemeManager appBackgroundColor] forKey:@"backgroundColor"];
+        NSDictionary* titleTextAttributes = @{
+            NSForegroundColorAttributeName: [ThemeManager textColor]
+        };
+        [navBarAppearanceStandard setValue:titleTextAttributes forKey:@"titleTextAttributes"];
+    }
+    
+    _settingsButton.tintColor = [ThemeManager appPrimaryColor];
+    _upButton.tintColor = [ThemeManager appPrimaryColor];
+    ((UIButton*)_addHostButton.customView).backgroundColor = [ThemeManager appPrimaryColor];
+    ((UIButton*)_helpButton.customView).tintColor = [ThemeManager appPrimaryColor];
+
+    [self applyNavBarAppearance];
+    [self updateTitle];
+    if (hostViewTitleLabel) {
+        hostViewTitleLabel.textColor = [ThemeManager textColor];
+    }
+    [self.hostCollectionVC updateTheme];
+}
+
+// Called when the system's theme (light/dark mode) changes
+- (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection {
+    [super traitCollectionDidChange:previousTraitCollection];
+    if (@available(iOS 13.0, *)) {
+        if ([self.traitCollection hasDifferentColorAppearanceComparedToTraitCollection:previousTraitCollection]) {
+            [ThemeManager setUserInterfaceStyle:self.traitCollection.userInterfaceStyle];
+        }
+    }
+}
+
+- (void)viewDidLoad{
     [super viewDidLoad];
+    
     //[OrientationHelper updateOrientationToLandscape];
     // self.navigationController.delegate = self;
     [[NSNotificationCenter defaultCenter] addObserver:self
@@ -1800,6 +1835,11 @@ static NSMutableSet* hostList;
 {
     [super viewWillAppear:NO];
 
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateTheme)
+                                                 name:ThemeDidChangeNotification
+                                               object:nil];
+
     /* this makes background color works*/
     
     if(!_settingsViewExpanded){
@@ -1819,13 +1859,12 @@ static NSMutableSet* hostList;
     // this view via an error dialog from the stream
     // view, so we won't get a return to active notification
     // for that which would normally fire beginForegroundRefresh.
-    self.view.backgroundColor = [ThemeManager appBackgroundColor];
-    self.hostCollectionVC.view.backgroundColor = [ThemeManager appBackgroundColor];
-    self.collectionView.backgroundColor = [ThemeManager appBackgroundColor];
     
     [self.view addSubview:self.collectionView];
     [self initHostCollection];
     if(!_enteredAppView) [self switchToHostView];
+    
+    [self updateTheme];
 }
 
 - (void)viewDidDisappear:(BOOL)animated

VoidLink/ViewControllers/SWRevealViewController.m

@@ -837,9 +837,36 @@ const int FrontViewPositionNone = 0xff;
 }
 
 
-- (void)viewDidLoad{
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
 
+- (void)updateTheme {
+    _contentView.backgroundColor = [ThemeManager appBackgroundColor];
+    _contentView.rearNavView.backgroundColor = [ThemeManager appBackgroundColor];
+    _separatorLine.backgroundColor = [ThemeManager separatorColor];
+    
+    if (@available(iOS 13.0, *)) {
+        UINavigationBarAppearance *navBarAppearanceStandard = _dockedNavBar.standardAppearance;
+        navBarAppearanceStandard.backgroundColor = [ThemeManager appBackgroundColor];
+        navBarAppearanceStandard.titleTextAttributes = @{
+            NSForegroundColorAttributeName: [ThemeManager textColor]
+        };
+        _dockedNavBar.standardAppearance = navBarAppearanceStandard;
+        _dockedNavBar.scrollEdgeAppearance = navBarAppearanceStandard;
+    } else {
+        _dockedNavBar.barTintColor = [ThemeManager appBackgroundColor];
+    }
+}
+
+- (void)viewDidLoad{
     self.isStreaming = false; //init this flag
+    
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateTheme)
+                                                 name:ThemeDidChangeNotification
+                                               object:nil];
+    [self updateTheme];
 }
 
 - (void)viewDidAppear:(BOOL)animated
@@ -2425,5 +2452,3 @@ NSString * const SWSegueRightIdentifier = @"sw_right";
 //}
 //
 //@end
-
-

VoidLink/ViewControllers/SettingsViewController.m

@@ -1232,8 +1232,16 @@ BOOL isCustomResolution(CGSize res) {
      */
 }
 
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 - (void)viewDidLoad {
-    //[self updateTheme];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateTheme)
+                                                 name:ThemeDidChangeNotification
+                                               object:nil];
+    
     settingStackWillBeRelocatedToLowestPosition = false;
     hiddenStacks = [[NSMutableSet alloc] init];
 

VoidLink/ViewControllers/StreamFrameViewController.m

@@ -490,6 +490,16 @@
 
 }
 
+- (void)updateTheme {
+    self.view.backgroundColor = [ThemeManager appBackgroundColor];
+    _stageLabel.textColor = [[ThemeManager textColor] colorWithAlphaComponent:0.9];
+    _spinner.color = [ThemeManager textColor];
+}
+
+- (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 
 - (void)viewDidLoad
 {
@@ -501,6 +511,11 @@
     
     [UIApplication sharedApplication].idleTimerDisabled = YES;
     
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateTheme)
+                                                 name:@"ThemeDidChangeNotification"
+                                               object:nil];
+    
     _settings = [[[DataManager alloc] init] getSettings];  //StreamFrameViewController retrieve the settings here.
     
     _stageLabel = [[UILabel alloc] init];
@@ -631,9 +646,7 @@
     _stageLabel.textColor = [UIColor systemGrayColor];
     _spinner.color = [UIColor systemGrayColor];
     
-    self.view.backgroundColor = [ThemeManager appBackgroundColor];
+    [self updateTheme];
-    _stageLabel.textColor = [[ThemeManager textColor] colorWithAlphaComponent:0.9];
-    _spinner.color = [ThemeManager textColor];
     
     [self.view addSubview:_stageLabel];
     [self.view addSubview:_spinner];