Support light navigation bar

In order to propagate the information about whether the IME is using
light navigation bar or not from

  android.view.ViewRootImpl

to

  android.inputmethodservice.NavigationBarController

within the same process, this CL adds a new @hide method to

  Window.Callback

as follows.

 ViewRootImpl#performTraversals()
  -> DecorView#onSystemBarAppearanceChanged()
   -> Window.Callback#onSystemBarAppearanceChanged()
    -> SoftInputWindow#onSystemBarAppearanceChanged()
     -> NavigationBarController#onSystemBarAppearanceChanged()

Button color transition will be implemented in a subsequent CL.

Bug: 215549533
Test: Manually tested with ThemedNavBarKeyboard sample
  1. Build aosp_coral-userdebug and flash it
  2. adb root
  3. adb shell setprop \
      persist.sys.ime.can_render_gestural_nav_buttons true
  4. adb reboot
  5. make -j ThemedNavBarKeyboard
  6. adb install -r \
      $OUT/system/app/ThemedNavBarKeyboard/ThemedNavBarKeyboard.apk
  7. adb shell ime enable \
      com.example.android.themednavbarkeyboard/.ThemedNavBarKeyboard
  8. adb shell ime set \
      com.example.android.themednavbarkeyboard/.ThemedNavBarKeyboard
  9. Open the Dialer app
 10. Focus in the top edit field.
 11. Tap "EXTENDED LIGHT NAVIGARION BAR" mode
 12. Make sure that the navigation button color is optimized for light
     navigation bar.
 13. Tap "STANDARD LIGHT NAVIGARION BAR" mode
 14. Make sure that the navigation button color is optimized for light
     navigation bar.
Change-Id: I08566034bebfafff6777ce0152cd6ca1f66f6cad

1 files changed, 12 insertions, 4 deletions

diff --git a/core/java/android/inputmethodservice/SoftInputWindow.java b/core/java/android/inputmethodservice/SoftInputWindow.java
index 6c8eb41d8724..0893d2aad740 100644
--- a/core/java/android/inputmethodservice/SoftInputWindow.java
+++ b/core/java/android/inputmethodservice/SoftInputWindow.java
@@ -23,7 +23,6 @@ import static java.lang.annotation.RetentionPolicy.SOURCE;
 
 import android.annotation.IntDef;
 import android.app.Dialog;
-import android.content.Context;
 import android.graphics.Rect;
 import android.os.Debug;
 import android.os.IBinder;
@@ -32,6 +31,7 @@ import android.util.proto.ProtoOutputStream;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.WindowInsetsController;
 import android.view.WindowManager;
 
 import java.lang.annotation.Retention;
@@ -47,6 +47,7 @@ final class SoftInputWindow extends Dialog {
 
     private final KeyEvent.DispatcherState mDispatcherState;
     private final Rect mBounds = new Rect();
+    private final InputMethodService mService;
 
     @Retention(SOURCE)
     @IntDef(value = {WindowState.TOKEN_PENDING, WindowState.TOKEN_SET,
@@ -120,7 +121,7 @@ final class SoftInputWindow extends Dialog {
     /**
      * Create a SoftInputWindow that uses a custom style.
      *
-     * @param context The Context in which the DockWindow should run. In
+     * @param service The {@link InputMethodService} in which the DockWindow should run. In
      *        particular, it uses the window manager and theme from this context
      *        to present its UI.
      * @param theme A style resource describing the theme to use for the window.
@@ -129,8 +130,10 @@ final class SoftInputWindow extends Dialog {
      *        using styles. This theme is applied on top of the current theme in
      *        <var>context</var>. If 0, the default dialog theme will be used.
      */
-    SoftInputWindow(Context context, int theme, KeyEvent.DispatcherState dispatcherState) {
-        super(context, theme);
+    SoftInputWindow(InputMethodService service, int theme,
+            KeyEvent.DispatcherState dispatcherState) {
+        super(service, theme);
+        mService = service;
         mDispatcherState = dispatcherState;
     }
 
@@ -261,6 +264,11 @@ final class SoftInputWindow extends Dialog {
         }
     }
 
+    @Override
+    public void onSystemBarAppearanceChanged(@WindowInsetsController.Appearance int appearance) {
+        mService.mNavigationBarController.onSystemBarAppearanceChanged(appearance);
+    }
+
     void dumpDebug(ProtoOutputStream proto, long fieldId) {
         final long token = proto.start(fieldId);
         mBounds.dumpDebug(proto, BOUNDS);