Settings: Add back hide IME navbar functionality [1/3]

Author: genoxci-dev

res/values/custom_strings.xml

@@ -43,4 +43,8 @@
 
     <string name="wellbeing_title">Digital Wellbeing &amp; parental controls</string>
     <string name="wellbeing_summary">Screen time, app timers, bedtime schedules</string>
+
+    <!-- hide IME navbar -->
+    <string name="keyboard_no_navigation_title">Keyboard IME space</string>
+    <string name="keyboard_no_navigation_summary">Show space below keyboard when using gesture navigation</string>
 </resources>

res/xml/gesture_navigation_settings.xml

@@ -34,6 +34,13 @@
         android:summary="@string/show_navbar_hint_summary"
         android:defaultValue="true" />
 
+    <SwitchPreferenceCompat
+        android:key="keyboard_no_navigation_bar"
+        android:title="@string/keyboard_no_navigation_title"
+        android:summary="@string/keyboard_no_navigation_summary"
+        android:defaultValue="true"
+        settings:controller="com.android.settings.navigationbar.KeyboardNoNavigationBarController" />
+
     <com.android.settings.widget.LabeledSeekBarPreference
         android:key="gesture_navbar_length_preference"
         android:title="@string/gesture_navbar_length_title"

src/com/android/settings/navigationbar/KeyboardNoNavigationBarController.java

@@ -0,0 +1,82 @@
+/*
+ * SPDX-FileCopyrightText: DerpFest AOSP
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.android.settings.navigationbar;
+
+import android.provider.Settings;
+import android.os.SystemProperties;
+import android.content.Context;
+import android.util.Log;
+
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreferenceCompat;
+
+import com.android.settings.core.BasePreferenceController;
+
+public class KeyboardNoNavigationBarController extends BasePreferenceController implements Preference.OnPreferenceChangeListener {
+
+    private static final String KEY_KEYBOARD_NO_NAVIGATION_BAR = "keyboard_no_navigation_bar";
+    private static final String TAG = "NoNavbarController";
+
+    public KeyboardNoNavigationBarController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        int navigationMode = Settings.Secure.getInt(
+            mContext.getContentResolver(),
+            Settings.Secure.NAVIGATION_MODE,
+            0 // Default to 0 if the setting is not found
+        );
+
+        return navigationMode == 2
+                ? AVAILABLE 
+                : UNSUPPORTED_ON_DEVICE;
+
+    }
+
+    public boolean isChecked() {
+        String value = SystemProperties.get("persist.sys.keyboard_no_navigation_bar", "1"); 
+        boolean result = "1".equals(value); // switch is ON only when overlay is disabled
+        Log.d(TAG, "isChecked() reversed logic returning: " + result);
+        return result;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        if (!(newValue instanceof Boolean)) {
+            Log.e(TAG, "Unexpected value type for preference: " + newValue);
+            return false;
+        }
+
+        boolean enabled = (Boolean) newValue;
+        String newPropValue = enabled ? "1" : "0";
+        SystemProperties.set("persist.sys.keyboard_no_navigation_bar", newPropValue);
+        Log.d(TAG, "onPreferenceChange() set persist.sys.keyboard_no_navigation_bar to: " + newPropValue);
+
+        String command = enabled
+                ? "cmd overlay disable com.voltage.overlay.customization.keyboard.nonavbar"
+                : "cmd overlay enable com.voltage.overlay.customization.keyboard.nonavbar";
+
+        try {
+            Runtime.getRuntime().exec(new String[]{"sh", "-c", command});
+            Log.d(TAG, "Executed command: " + command);
+        } catch (Exception e) {
+            Log.e(TAG, "Failed to execute overlay command", e);
+        }
+
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        if (preference instanceof SwitchPreferenceCompat) {
+            boolean checked = isChecked();
+            ((SwitchPreferenceCompat) preference).setChecked(checked);
+            Log.d(TAG, "updateState() setting switch to: " + checked);
+        }
+    }
+}