Fix black bar on display cutout side in landscape

In landscape orientation, the display cutout moves to a long edge of
the screen. With windowLayoutInDisplayCutoutMode set to shortEdges,
the system prevents the window from extending into the cutout area on
long edges, leaving a black bar.

Two changes fix this:

1. Set windowLayoutInDisplayCutoutMode to "always" (API 30+) so the
   window extends into the cutout area on all edges, not just short
   ones.

2. Stop DrawerLayoutContainer from voluntarily avoiding the cutout:
   remove displayCutout() from the inset types used to calculate
   child margins and to draw black background rects. The content now
   fills the full screen area including behind the cutout.

Author: rybnikov

TMessagesProj/src/main/java/org/telegram/ui/ActionBar/DrawerLayoutContainer.java

@@ -20,7 +20,6 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.core.graphics.Insets;
-import androidx.core.view.DisplayCutoutCompat;
 import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
 
@@ -36,8 +35,6 @@ public class DrawerLayoutContainer extends FrameLayout {
 
     private int behindKeyboardColor;
 
-    private boolean hasCutout;
-
     private boolean inLayout;
 
     public boolean allowDrawContent = true;
@@ -75,10 +72,6 @@ public DrawerLayoutContainer(Context context) {
             firstLayout = false;
             drawerLayoutContainer.setWillNotDraw(insets.getSystemWindowInsetTop() <= 0 && getBackground() == null);
 
-            if (Build.VERSION.SDK_INT >= 28) {
-                DisplayCutoutCompat cutout = insets.getDisplayCutout();
-                hasCutout = cutout != null && !cutout.getBoundingRects().isEmpty();
-            }
             invalidate();
 
             return onApplyWindowInsets(v, insets);
@@ -203,8 +196,7 @@ protected void onDraw(@NonNull Canvas canvas) {
         }
 
         final Insets insets = lastWindowInsetsCompat.getInsets(WindowInsetsCompat.Type.ime()
-            | WindowInsetsCompat.Type.systemBars()
-            | WindowInsetsCompat.Type.displayCutout());
+            | WindowInsetsCompat.Type.systemBars());
 
         if (insets.bottom > 0) {
             backgroundPaint.setColor(behindKeyboardColor);
@@ -216,18 +208,6 @@ protected void onDraw(@NonNull Canvas canvas) {
                 internalNavbarPaint
             );
         }
-
-        if (hasCutout) {
-            backgroundPaint.setColor(0xff000000);
-            int left = insets.left;
-            if (left != 0) {
-                canvas.drawRect(0, 0, left, getMeasuredHeight(), backgroundPaint);
-            }
-            int right = insets.right;
-            if (right != 0) {
-                canvas.drawRect(right, 0, getMeasuredWidth(), getMeasuredHeight(), backgroundPaint);
-            }
-        }
     }
 
     @Override
@@ -270,8 +250,7 @@ private void dispatchApplyWindowInsetsInternal(View child, WindowInsetsCompat in
 
         final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
         final Insets systemInsetsWithIme = insets.getInsets(WindowInsetsCompat.Type.ime()
-                | WindowInsetsCompat.Type.systemBars()
-                | WindowInsetsCompat.Type.displayCutout());
+                | WindowInsetsCompat.Type.systemBars());
 
         final boolean changed = lp.topMargin != 0 || lp.bottomMargin != 0
                 || lp.leftMargin != systemInsetsWithIme.left

TMessagesProj/src/main/res/values-v31/styles.xml

@@ -56,7 +56,7 @@
         <item name="android:calendarViewStyle">@style/Theme.TMessages.CalendarView</item>
         <item name="android:navigationBarColor">#000000</item>
         <item name="android:textViewStyle">@style/MyTextViewStyle</item>
-        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
+        <item name="android:windowLayoutInDisplayCutoutMode">always</item>
         <item name="android:forceDarkAllowed">false</item>
     </style>
 
@@ -82,7 +82,7 @@
         <item name="android:calendarViewStyle">@style/Theme.TMessages.CalendarView</item>
         <item name="android:navigationBarColor">#000000</item>
         <item name="android:textViewStyle">@style/MyTextViewStyle</item>
-        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
+        <item name="android:windowLayoutInDisplayCutoutMode">always</item>
         <item name="android:forceDarkAllowed">false</item>
     </style>