Fixed a couple of bugs with the share extension

Fixed a bug where sharing a text file was resulting in the entire contents being put into the message input field
Fixed a bug where sharing from within the app where the app was in dark mode but the device was in light mode would result in buggy UI

Session/Meta/AppDelegate.m

@@ -194,7 +194,7 @@ static NSTimeInterval launchStartedAt;
     mainWindow.rootViewController = [LoadingViewController new];
     [mainWindow makeKeyAndVisible];
 
-    LKAppMode appMode = [self getCurrentAppMode];
+    LKAppMode appMode = [LKAppModeManager getAppModeOrSystemDefault];
     [self adaptAppMode:appMode];
 
     if (@available(iOS 11, *)) {
@@ -245,7 +245,7 @@ static NSTimeInterval launchStartedAt;
 
     [self ensureRootViewController];
 
-    LKAppMode appMode = [self getCurrentAppMode];
+    LKAppMode appMode = [LKAppModeManager getAppModeOrSystemDefault];
     [self adaptAppMode:appMode];
 
     [AppReadiness runNowOrWhenAppDidBecomeReady:^{
@@ -734,12 +734,6 @@ static NSTimeInterval launchStartedAt;
     [NSNotificationCenter.defaultCenter postNotificationName:NSNotification.appModeChanged object:nil];
 }
 
-- (LKAppMode)getCurrentAppMode
-{
-    LKAppMode appMode = [self getAppModeOrSystemDefault];
-    return appMode;
-}
-
 - (void)setCurrentAppMode:(LKAppMode)appMode
 {
     [NSUserDefaults.standardUserDefaults setInteger:appMode forKey:@"appMode"];
@@ -749,7 +743,7 @@ static NSTimeInterval launchStartedAt;
 - (void)setAppModeToSystemDefault
 {
     [NSUserDefaults.standardUserDefaults removeObjectForKey:@"appMode"];
-    LKAppMode appMode = [self getCurrentAppMode];
+    LKAppMode appMode = [LKAppModeManager getAppModeOrSystemDefault];
     [self adaptAppMode:appMode];
 }
 

Session/Meta/AppDelegate.swift

@@ -40,20 +40,4 @@ extension AppDelegate {
     @objc func stopClosedGroupPoller() {
         ClosedGroupPoller.shared.stop()
     }
-    
-    @objc func getAppModeOrSystemDefault() -> AppMode {
-        let userDefaults = UserDefaults.standard
-        
-        guard userDefaults.dictionaryRepresentation().keys.contains("appMode") else {
-            if #available(iOS 13.0, *) {
-                return UITraitCollection.current.userInterfaceStyle == .dark ? .dark : .light
-            } else {
-                return .light
-            }
-        }
-        
-        let mode = userDefaults.integer(forKey: "appMode")
-        return AppMode(rawValue: mode) ?? .light
-    }
-    
 }

SessionMessagingKit/Sending & Receiving/Attachments/SignalAttachment.swift

@@ -462,7 +462,12 @@ public class SignalAttachment: NSObject {
 
     @objc
     public var isText: Bool {
-        return UTTypeConformsTo(dataUTI as CFString, kUTTypeText) || isOversizeText
+        return (
+            isConvertibleToTextMessage && (
+                UTTypeConformsTo(dataUTI as CFString, kUTTypeText) ||
+                isOversizeText
+            )
+        )
     }
 
     @objc

SessionShareExtension/ShareVC.swift

@@ -163,15 +163,6 @@ final class ShareVC : UINavigationController, ShareViewDelegate, AppModeManagerD
 
     // MARK: - App Mode
 
-    public func getCurrentAppMode() -> AppMode {
-        guard let window = self.view.window else { return .light }
-        
-        let userInterfaceStyle = window.traitCollection.userInterfaceStyle
-        let isLightMode = (userInterfaceStyle == .light || userInterfaceStyle == .unspecified)
-        
-        return (isLightMode ? .light : .dark)
-    }
-
     public func setCurrentAppMode(to appMode: AppMode) {
         return // Not applicable to share extensions
     }

SessionShareExtension/ThreadPickerVC.swift

@@ -95,6 +95,11 @@ final class ThreadPickerVC: UIViewController, UITableViewDataSource, UITableView
         }
     }
     
+    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
+        view.setGradient(Gradients.defaultBackground)
+        fadeView.setGradient(Gradients.homeVCFade)
+    }
+    
     // MARK: Layout
     
     private func setupLayout() {

SessionUIKit/Style Guide/AppMode.swift

@@ -1,11 +1,11 @@
-import Foundation
+import UIKit
 
 @objc(LKAppModeManager)
 public final class AppModeManager : NSObject {
     private let delegate: AppModeManagerDelegate
 
     public var currentAppMode: AppMode {
-        return delegate.getCurrentAppMode()
+        return AppModeManager.getAppModeOrSystemDefault()
     }
 
     public static var shared: AppModeManager!
@@ -29,12 +29,26 @@ public final class AppModeManager : NSObject {
     public func setAppModeToSystemDefault() {
         delegate.setAppModeToSystemDefault()
     }
+    
+    @objc public static func getAppModeOrSystemDefault() -> AppMode {
+        let userDefaults = UserDefaults.standard
+        
+        guard userDefaults.dictionaryRepresentation().keys.contains("appMode") else {
+            if #available(iOS 13.0, *) {
+                return UITraitCollection.current.userInterfaceStyle == .dark ? .dark : .light
+            }
+            
+            return .light
+        }
+        
+        let mode = userDefaults.integer(forKey: "appMode")
+        return AppMode(rawValue: mode) ?? .light
+    }
 }
 
 @objc(LKAppModeManagerDelegate)
 public protocol AppModeManagerDelegate {
 
-    func getCurrentAppMode() -> AppMode
     @objc(setCurrentAppMode:)
     func setCurrentAppMode(to appMode: AppMode)
     func setAppModeToSystemDefault()