Map DPAD_DOWN to TAB in HAWebView

app/src/main/kotlin/io/homeassistant/companion/android/util/compose/webview/HAWebView.kt

@@ -4,6 +4,7 @@ import android.annotation.SuppressLint
 import android.content.res.Configuration
 import android.graphics.Color
 import android.os.Build
+import android.view.KeyEvent
 import android.webkit.WebSettings
 import android.webkit.WebView
 import android.widget.FrameLayout
@@ -38,6 +39,7 @@ const val BLANK_URL = "about:blank"
  * - Night mode support
  * - Custom user agent
  * - Transparent background
+ * - DPAD_DOWN to TAB remapping for Android TV navigation (via `OnKeyListener`)
  *
  * This composable provides a convenient way to embed a WebView within a Jetpack Compose UI.
  * Further customization of the WebView instance is possible through the [configure] lambda.
@@ -53,6 +55,8 @@ const val BLANK_URL = "about:blank"
  * @param modifier The modifier to be applied to this WebView.
  * @param nightModeTheme current [NightModeTheme]
  * @param configure A lambda that allows for customization of the WebView instance.
+ *                  Note: calling `setOnKeyListener` in this lambda will override the default
+ *                  DPAD_DOWN to TAB remapping.
  * @param factory A lambda that creates the WebView instance. If this returns null, a new
  *                WebView will be created with the current context. This is useful for providing
  *                a pre-configured WebView instance.
@@ -90,6 +94,7 @@ fun HAWebView(
                             FrameLayout.LayoutParams.MATCH_PARENT,
                         )
                         defaultSettings()
+                        remapDpadDownToTab()
                         configure(this)
                     }
                 } catch (t: Throwable) {
@@ -123,6 +128,23 @@ fun HAWebView(
     }
 }
 
+/**
+ * Remaps DPAD_DOWN key events to TAB for Android TV remote control navigation.
+ *
+ * Android TV remotes send DPAD_DOWN events which don't navigate the web frontend
+ * properly. Remapping to TAB allows basic element-to-element navigation in the WebView.
+ */
+private fun WebView.remapDpadDownToTab() {
+    setOnKeyListener { view, keyCode, event ->
+        if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN && event.action == KeyEvent.ACTION_DOWN) {
+            view.dispatchKeyEvent(KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_TAB))
+            true
+        } else {
+            false
+        }
+    }
+}
+
 fun WebView.settings(configureDsl: WebSettings.() -> Unit) {
     try {
         settings.configureDsl()

app/src/main/kotlin/io/homeassistant/companion/android/webview/WebViewActivity.kt

@@ -20,7 +20,6 @@ import android.text.method.HideReturnsTransformationMethod
 import android.text.method.PasswordTransformationMethod
 import android.util.DisplayMetrics
 import android.util.Rational
-import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.View
 import android.view.WindowManager
@@ -2163,16 +2162,6 @@ class WebViewActivity :
         evaluateJavascript(eventCode, null)
     }
 
-    override fun dispatchKeyEvent(event: KeyEvent): Boolean {
-        // Workaround to sideload on Android TV and use a remote for basic navigation in WebView
-        if (event.keyCode == KeyEvent.KEYCODE_DPAD_DOWN && event.action == KeyEvent.ACTION_DOWN) {
-            dispatchKeyEvent(KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_TAB))
-            return true
-        }
-
-        return super.dispatchKeyEvent(event)
-    }
-
     private fun setWebViewZoom() = lifecycleScope.launch {
         // Set base zoom level (percentage must be scaled to device density/percentage)
         webView.setInitialScale((resources.displayMetrics.density * presenter.getPageZoomLevel()).toInt())