termux · Feb 1, 2021 · Jan 28, 2021 · Jan 28, 2021
diff --git a/app/src/main/java/com/termux/app/FullScreenWorkAround.java b/app/src/main/java/com/termux/app/FullScreenWorkAround.java
@@ -0,0 +1,66 @@
+package com.termux.app;
+
+import android.graphics.Rect;
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * Work around for fullscreen mode in Termux to fix ExtraKeysView not being visible.
+ * This class is derived from:
+ * https://stackoverflow.com/questions/7417123/android-how-to-adjust-layout-in-full-screen-mode-when-softkeyboard-is-visible
+ * and has some additional tweaks
+ * ---
+ * For more information, see https://issuetracker.google.com/issues/36911528
+ */
+public class FullScreenWorkAround {
+    private View mChildOfContent;
+    private int mUsableHeightPrevious;
+    private ViewGroup.LayoutParams mViewGroupLayoutParams;
+
+    private int mNavBarHeight;
+
+
+    public static void apply(TermuxActivity activity) {
+        new FullScreenWorkAround(activity);
+    }
+
+    private FullScreenWorkAround(TermuxActivity activity) {
+        ViewGroup content = activity.findViewById(android.R.id.content);
+        mChildOfContent = content.getChildAt(0);
+        mViewGroupLayoutParams = mChildOfContent.getLayoutParams();
+        mNavBarHeight = activity.getNavBarHeight();
+        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(this::possiblyResizeChildOfContent);
+    }
+
+    private void possiblyResizeChildOfContent() {
+        int usableHeightNow = computeUsableHeight();
+        if (usableHeightNow != mUsableHeightPrevious) {
+            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
+            int heightDifference = usableHeightSansKeyboard - usableHeightNow;
+            if (heightDifference > (usableHeightSansKeyboard / 4)) {
+                // keyboard probably just became visible
+
+                // ensures that usable layout space does not extend behind the
+                // soft keyboard, causing the extra keys to not be visible
+                mViewGroupLayoutParams.height = (usableHeightSansKeyboard - heightDifference) + getNavBarHeight();
+            } else {
+                // keyboard probably just became hidden
+                mViewGroupLayoutParams.height = usableHeightSansKeyboard;
+            }
+            mChildOfContent.requestLayout();
+            mUsableHeightPrevious = usableHeightNow;
+        }
+    }
+
+    private int getNavBarHeight() {
+        return mNavBarHeight;
+    }
+
+    private int computeUsableHeight() {
+        Rect r = new Rect();
+        mChildOfContent.getWindowVisibleDisplayFrame(r);
+        return (r.bottom - r.top);
+    }
+
+}
+
diff --git a/app/src/main/java/com/termux/app/TermuxActivity.java b/app/src/main/java/com/termux/app/TermuxActivity.java
@@ -134,6 +134,8 @@ public final class TermuxActivity extends Activity implements ServiceConnection
 
     boolean mIsUsingBlackUI;
 
+    int mNavBarHeight;
+
     final SoundPool mBellSoundPool = new SoundPool.Builder().setMaxStreams(1).setAudioAttributes(
         new AudioAttributes.Builder().setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
             .setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION).build()).build();
@@ -214,8 +216,19 @@ public void onCreate(Bundle bundle) {
 
         super.onCreate(bundle);
 
+
         setContentView(R.layout.drawer_layout);
 
+        View content = findViewById(android.R.id.content);
+        content.setOnApplyWindowInsetsListener((v, insets) -> {
+            mNavBarHeight = insets.getSystemWindowInsetBottom();
+            return insets;
+        });
+
+        if (mSettings.isUsingFullScreen()) {
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
+        }
+
         if (mIsUsingBlackUI) {
             findViewById(R.id.left_drawer).setBackgroundColor(
                 getResources().getColor(android.R.color.background_dark)
@@ -256,6 +269,12 @@ public Object instantiateItem(@NonNull ViewGroup collection, int position) {
                 if (position == 0) {
                     layout = mExtraKeysView = (ExtraKeysView) inflater.inflate(R.layout.extra_keys_main, collection, false);
                     mExtraKeysView.reload(mSettings.mExtraKeys);
+
+                    // apply extra keys fix if enabled in prefs
+                    if (mSettings.isUsingFullScreen() && mSettings.isUsingFullScreenWorkAround()) {
+                        FullScreenWorkAround.apply(TermuxActivity.this);
+                    }
+
                 } else {
                     layout = inflater.inflate(R.layout.extra_keys_right, collection, false);
                     final EditText editText = layout.findViewById(R.id.text_input);
@@ -331,6 +350,10 @@ public void onPageSelected(int position) {
         sendOpenedBroadcast();
     }
 
+    public int getNavBarHeight() {
+        return mNavBarHeight;
+    }
+
     /**
      * Send a broadcast notifying Termux app has been opened
      */

diff --git a/app/src/main/java/com/termux/app/TermuxPreferences.java b/app/src/main/java/com/termux/app/TermuxPreferences.java
@@ -28,6 +28,8 @@
 
 import androidx.annotation.IntDef;
 
+import static com.termux.terminal.EmulatorDebug.LOG_TAG;
+
 final class TermuxPreferences {
 
     @IntDef({BELL_VIBRATE, BELL_BEEP, BELL_IGNORE})
@@ -67,6 +69,9 @@ final static class KeyboardShortcut {
     private boolean mScreenAlwaysOn;
     private int mFontSize;
 
+    private boolean mUseFullScreen;
+    private boolean mUseFullScreenWorkAround;
+
     @AsciiBellBehaviour
     int mBellBehaviour = BELL_VIBRATE;
 
@@ -137,6 +142,14 @@ boolean isUsingBlackUI() {
         return mUseDarkUI;
     }
 
+    boolean isUsingFullScreen() {
+        return mUseFullScreen;
+    }
+
+    boolean isUsingFullScreenWorkAround() {
+        return mUseFullScreenWorkAround;
+    }
+
     void setScreenAlwaysOn(Context context, boolean newValue) {
         mScreenAlwaysOn = newValue;
         PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(SCREEN_ALWAYS_ON_KEY, newValue).apply();
@@ -196,6 +209,24 @@ void reloadFromProperties(Context context) {
                 mUseDarkUI = nightMode == Configuration.UI_MODE_NIGHT_YES;
         }
 
+        switch (props.getProperty("fullscreen", "").toLowerCase()) {
+            case "true":
+                mUseFullScreen = true;
+                break;
+            case "false":
+            default:
+                mUseFullScreen = false;
+        }
+
+        switch (props.getProperty("use-fullscreen-workaround", "").toLowerCase()) {
+            case "true":
+                mUseFullScreenWorkAround = true;
+                break;
+            case "false":
+            default:
+                mUseFullScreenWorkAround = false;
+        }
+
         String defaultExtraKeys = "[[ESC, TAB, CTRL, ALT, {key: '-', popup: '|'}, DOWN, UP]]";
 
         try {