diff --git a/app/src/main/java/com/termux/app/TermuxActivity.java b/app/src/main/java/com/termux/app/TermuxActivity.java
index 257ec38993..254b3bc50f 100644
--- a/app/src/main/java/com/termux/app/TermuxActivity.java
+++ b/app/src/main/java/com/termux/app/TermuxActivity.java
@@ -44,7 +44,7 @@
 import com.termux.app.terminal.io.TerminalToolbarViewPager;
 import com.termux.app.terminal.TermuxTerminalSessionClient;
 import com.termux.app.terminal.TermuxTerminalViewClient;
-import com.termux.app.terminal.io.extrakeys.ExtraKeysView;
+import com.termux.shared.terminal.io.extrakeys.ExtraKeysView;
 import com.termux.app.settings.properties.TermuxAppSharedProperties;
 import com.termux.shared.interact.TextInputDialogUtils;
 import com.termux.shared.logger.Logger;
diff --git a/app/src/main/java/com/termux/app/settings/properties/TermuxAppSharedProperties.java b/app/src/main/java/com/termux/app/settings/properties/TermuxAppSharedProperties.java
index 6c2e03713a..fabe683a3c 100644
--- a/app/src/main/java/com/termux/app/settings/properties/TermuxAppSharedProperties.java
+++ b/app/src/main/java/com/termux/app/settings/properties/TermuxAppSharedProperties.java
@@ -3,7 +3,9 @@
 import android.content.Context;
 
 import com.termux.app.terminal.io.KeyboardShortcut;
-import com.termux.app.terminal.io.extrakeys.ExtraKeysInfo;
+import com.termux.shared.terminal.io.extrakeys.ExtraKeysConstants;
+import com.termux.shared.terminal.io.extrakeys.ExtraKeysConstants.EXTRA_KEY_DISPLAY_MAPS;
+import com.termux.shared.terminal.io.extrakeys.ExtraKeysInfo;
 import com.termux.shared.logger.Logger;
 import com.termux.shared.settings.properties.TermuxPropertyConstants;
 import com.termux.shared.settings.properties.TermuxSharedProperties;
@@ -50,13 +52,20 @@ private void setExtraKeys() {
             // {@link #getExtraKeysStyleInternalPropertyValueFromValue(String)}
             String extrakeys = (String) getInternalPropertyValue(TermuxPropertyConstants.KEY_EXTRA_KEYS, true);
             String extraKeysStyle = (String) getInternalPropertyValue(TermuxPropertyConstants.KEY_EXTRA_KEYS_STYLE, true);
-            mExtraKeysInfo = new ExtraKeysInfo(extrakeys, extraKeysStyle);
+
+            ExtraKeysConstants.ExtraKeyDisplayMap extraKeyDisplayMap = ExtraKeysInfo.getCharDisplayMapForStyle(extraKeysStyle);
+            if (EXTRA_KEY_DISPLAY_MAPS.DEFAULT_CHAR_DISPLAY.equals(extraKeyDisplayMap) && !TermuxPropertyConstants.DEFAULT_IVALUE_EXTRA_KEYS_STYLE.equals(extraKeysStyle)) {
+                Logger.logError(TermuxSharedProperties.LOG_TAG, "The style \"" + extraKeysStyle + "\" for the key \"" + TermuxPropertyConstants.KEY_EXTRA_KEYS_STYLE + "\" is invalid. Using default style instead.");
+                extraKeysStyle = TermuxPropertyConstants.DEFAULT_IVALUE_EXTRA_KEYS_STYLE;
+            }
+
+            mExtraKeysInfo = new ExtraKeysInfo(extrakeys, extraKeysStyle, ExtraKeysConstants.CONTROL_CHARS_ALIASES);
         } catch (JSONException e) {
             Logger.showToast(mContext, "Could not load and set the \"" + TermuxPropertyConstants.KEY_EXTRA_KEYS + "\" property from the properties file: " + e.toString(), true);
             Logger.logStackTraceWithMessage(LOG_TAG, "Could not load and set the \"" + TermuxPropertyConstants.KEY_EXTRA_KEYS + "\" property from the properties file: ", e);
 
             try {
-                mExtraKeysInfo = new ExtraKeysInfo(TermuxPropertyConstants.DEFAULT_IVALUE_EXTRA_KEYS, TermuxPropertyConstants.DEFAULT_IVALUE_EXTRA_KEYS_STYLE);
+                mExtraKeysInfo = new ExtraKeysInfo(TermuxPropertyConstants.DEFAULT_IVALUE_EXTRA_KEYS, TermuxPropertyConstants.DEFAULT_IVALUE_EXTRA_KEYS_STYLE, ExtraKeysConstants.CONTROL_CHARS_ALIASES);
             } catch (JSONException e2) {
                 Logger.showToast(mContext, "Can't create default extra keys",true);
                 Logger.logStackTraceWithMessage(LOG_TAG, "Could create default extra keys: ", e);
diff --git a/app/src/main/java/com/termux/app/terminal/TermuxTerminalViewClient.java b/app/src/main/java/com/termux/app/terminal/TermuxTerminalViewClient.java
index 7e68d3ecf3..8e720444bc 100644
--- a/app/src/main/java/com/termux/app/terminal/TermuxTerminalViewClient.java
+++ b/app/src/main/java/com/termux/app/terminal/TermuxTerminalViewClient.java
@@ -27,13 +27,13 @@
 import com.termux.shared.interact.MessageDialogUtils;
 import com.termux.shared.shell.ShellUtils;
 import com.termux.shared.terminal.TermuxTerminalViewClientBase;
+import com.termux.shared.terminal.io.extrakeys.SpecialButton;
 import com.termux.shared.termux.AndroidUtils;
 import com.termux.shared.termux.TermuxConstants;
 import com.termux.shared.activities.ReportActivity;
 import com.termux.shared.models.ReportInfo;
 import com.termux.app.models.UserAction;
 import com.termux.app.terminal.io.KeyboardShortcut;
-import com.termux.app.terminal.io.extrakeys.ExtraKeysView;
 import com.termux.shared.settings.properties.TermuxPropertyConstants;
 import com.termux.shared.data.DataUtils;
 import com.termux.shared.logger.Logger;
@@ -289,12 +289,22 @@ private boolean handleVirtualKeys(int keyCode, KeyEvent event, boolean down) {
 
     @Override
     public boolean readControlKey() {
-        return (mActivity.getExtraKeysView() != null && mActivity.getExtraKeysView().readSpecialButton(ExtraKeysView.SpecialButton.CTRL)) || mVirtualControlKeyDown;
+        return readExtraKeysSpecialButton(SpecialButton.CTRL) || mVirtualControlKeyDown;
     }
 
     @Override
     public boolean readAltKey() {
-        return (mActivity.getExtraKeysView() != null && mActivity.getExtraKeysView().readSpecialButton(ExtraKeysView.SpecialButton.ALT));
+        return readExtraKeysSpecialButton(SpecialButton.ALT);
+    }
+
+    public boolean readExtraKeysSpecialButton(SpecialButton specialButton) {
+        if (mActivity.getExtraKeysView() == null) return false;
+        Boolean state = mActivity.getExtraKeysView().readSpecialButton(specialButton, true);
+        if (state == null) {
+            Logger.logError(LOG_TAG,"Failed to read an unregistered " + specialButton + " special button value from extra keys.");
+            return false;
+        }
+        return state;
     }
 
     @Override
diff --git a/app/src/main/java/com/termux/app/terminal/io/TerminalToolbarViewPager.java b/app/src/main/java/com/termux/app/terminal/io/TerminalToolbarViewPager.java
index dc306852b2..56f28fc0c2 100644
--- a/app/src/main/java/com/termux/app/terminal/io/TerminalToolbarViewPager.java
+++ b/app/src/main/java/com/termux/app/terminal/io/TerminalToolbarViewPager.java
@@ -11,7 +11,7 @@
 
 import com.termux.R;
 import com.termux.app.TermuxActivity;
-import com.termux.app.terminal.io.extrakeys.ExtraKeysView;
+import com.termux.shared.terminal.io.extrakeys.ExtraKeysView;
 import com.termux.terminal.TerminalSession;
 
 public class TerminalToolbarViewPager {
@@ -44,8 +44,8 @@ public Object instantiateItem(@NonNull ViewGroup collection, int position) {
             if (position == 0) {
                 layout = inflater.inflate(R.layout.view_terminal_toolbar_extra_keys, collection, false);
                 ExtraKeysView extraKeysView = (ExtraKeysView) layout;
-                extraKeysView.setTermuxTerminalViewClient(mActivity.getTermuxTerminalViewClient());
-                extraKeysView.setTermuxTerminalSessionClient(mActivity.getTermuxTerminalSessionClient());
+                extraKeysView.setExtraKeysViewClient(new TermuxTerminalExtraKeys(mActivity.getTerminalView(),
+                    mActivity.getTermuxTerminalViewClient(), mActivity.getTermuxTerminalSessionClient()));
                 mActivity.setExtraKeysView(extraKeysView);
                 extraKeysView.reload(mActivity.getProperties().getExtraKeysInfo());
 
diff --git a/app/src/main/java/com/termux/app/terminal/io/TermuxTerminalExtraKeys.java b/app/src/main/java/com/termux/app/terminal/io/TermuxTerminalExtraKeys.java
new file mode 100644
index 0000000000..483e6c0f2e
--- /dev/null
+++ b/app/src/main/java/com/termux/app/terminal/io/TermuxTerminalExtraKeys.java
@@ -0,0 +1,47 @@
+package com.termux.app.terminal.io;
+
+import android.annotation.SuppressLint;
+import android.view.Gravity;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.drawerlayout.widget.DrawerLayout;
+
+import com.termux.R;
+import com.termux.app.terminal.TermuxTerminalSessionClient;
+import com.termux.app.terminal.TermuxTerminalViewClient;
+import com.termux.shared.terminal.io.TerminalExtraKeys;
+import com.termux.view.TerminalView;
+
+public class TermuxTerminalExtraKeys extends TerminalExtraKeys {
+
+
+    TermuxTerminalViewClient mTermuxTerminalViewClient;
+    TermuxTerminalSessionClient mTermuxTerminalSessionClient;
+
+    public TermuxTerminalExtraKeys(@NonNull TerminalView terminalView,
+                                   TermuxTerminalViewClient termuxTerminalViewClient,
+                                   TermuxTerminalSessionClient termuxTerminalSessionClient) {
+        super(terminalView);
+        mTermuxTerminalViewClient = termuxTerminalViewClient;
+        mTermuxTerminalSessionClient = termuxTerminalSessionClient;
+    }
+
+    @SuppressLint("RtlHardcoded")
+    @Override
+    public void onTerminalExtraKeyButtonClick(View view, String key, boolean ctrlDown, boolean altDown, boolean shiftDown, boolean fnDown) {
+        if ("KEYBOARD".equals(key)) {
+            if(mTermuxTerminalViewClient != null)
+                mTermuxTerminalViewClient.onToggleSoftKeyboardRequest();
+        } else if ("DRAWER".equals(key)) {
+            DrawerLayout drawer = view.findViewById(R.id.drawer_layout);
+            drawer.openDrawer(Gravity.LEFT);
+        } else if ("PASTE".equals(key)) {
+            if(mTermuxTerminalSessionClient != null)
+                mTermuxTerminalSessionClient.onPasteTextFromClipboard(null);
+        } else {
+            super.onTerminalExtraKeyButtonClick(view, key, ctrlDown, altDown, shiftDown, fnDown);
+        }
+    }
+
+}
diff --git a/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeyButton.java b/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeyButton.java
deleted file mode 100644
index 9454081970..0000000000
--- a/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeyButton.java
+++ /dev/null
@@ -1,92 +0,0 @@
-package com.termux.app.terminal.io.extrakeys;
-
-import android.text.TextUtils;
-
-import androidx.annotation.Nullable;
-
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import java.util.Arrays;
-import java.util.stream.Collectors;
-
-public class ExtraKeyButton {
-
-    /**
-     * The key that will be sent to the terminal, either a control character
-     * defined in ExtraKeysView.keyCodesForString (LEFT, RIGHT, PGUP...) or
-     * some text.
-     */
-    private final String key;
-
-    /**
-     * If the key is a macro, i.e. a sequence of keys separated by space.
-     */
-    private final boolean macro;
-
-    /**
-     * The text that will be shown on the button.
-     */
-    private final String display;
-
-    /**
-     * The information of the popup (triggered by swipe up).
-     */
-    @Nullable
-    private ExtraKeyButton popup;
-
-    public ExtraKeyButton(ExtraKeysInfo.CharDisplayMap charDisplayMap, JSONObject config) throws JSONException {
-        this(charDisplayMap, config, null);
-    }
-
-    public ExtraKeyButton(ExtraKeysInfo.CharDisplayMap charDisplayMap, JSONObject config, @Nullable ExtraKeyButton popup) throws JSONException {
-        String keyFromConfig = config.optString("key", null);
-        String macroFromConfig = config.optString("macro", null);
-        String[] keys;
-        if (keyFromConfig != null && macroFromConfig != null) {
-            throw new JSONException("Both key and macro can't be set for the same key");
-        } else if (keyFromConfig != null) {
-            keys = new String[]{keyFromConfig};
-            this.macro = false;
-        } else if (macroFromConfig != null) {
-            keys = macroFromConfig.split(" ");
-            this.macro = true;
-        } else {
-            throw new JSONException("All keys have to specify either key or macro");
-        }
-
-        for (int i = 0; i < keys.length; i++) {
-            keys[i] = ExtraKeysInfo.replaceAlias(keys[i]);
-        }
-
-        this.key = TextUtils.join(" ", keys);
-
-        String displayFromConfig = config.optString("display", null);
-        if (displayFromConfig != null) {
-            this.display = displayFromConfig;
-        } else {
-            this.display = Arrays.stream(keys)
-                .map(key -> charDisplayMap.get(key, key))
-                .collect(Collectors.joining(" "));
-        }
-
-        this.popup = popup;
-    }
-
-    public String getKey() {
-        return key;
-    }
-
-    public boolean isMacro() {
-        return macro;
-    }
-
-    public String getDisplay() {
-        return display;
-    }
-
-    @Nullable
-    public ExtraKeyButton getPopup() {
-        return popup;
-    }
-}
diff --git a/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeysInfo.java b/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeysInfo.java
deleted file mode 100644
index ceaad78739..0000000000
--- a/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeysInfo.java
+++ /dev/null
@@ -1,260 +0,0 @@
-package com.termux.app.terminal.io.extrakeys;
-
-import com.termux.shared.logger.Logger;
-import com.termux.shared.settings.properties.TermuxPropertyConstants;
-import com.termux.shared.settings.properties.TermuxSharedProperties;
-
-import org.json.JSONArray;
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import java.util.HashMap;
-
-public class ExtraKeysInfo {
-
-    /**
-     * Matrix of buttons displayed
-     */
-    private final ExtraKeyButton[][] buttons;
-
-    /**
-     * This corresponds to one of the CharMapDisplay below
-     */
-    private String style;
-
-    public ExtraKeysInfo(String propertiesInfo, String style) throws JSONException {
-        this.style = style;
-
-        // Convert String propertiesInfo to Array of Arrays
-        JSONArray arr = new JSONArray(propertiesInfo);
-        Object[][] matrix = new Object[arr.length()][];
-        for (int i = 0; i < arr.length(); i++) {
-            JSONArray line = arr.getJSONArray(i);
-            matrix[i] = new Object[line.length()];
-            for (int j = 0; j < line.length(); j++) {
-                matrix[i][j] = line.get(j);
-            }
-        }
-
-        // convert matrix to buttons
-        this.buttons = new ExtraKeyButton[matrix.length][];
-        for (int i = 0; i < matrix.length; i++) {
-            this.buttons[i] = new ExtraKeyButton[matrix[i].length];
-            for (int j = 0; j < matrix[i].length; j++) {
-                Object key = matrix[i][j];
-
-                JSONObject jobject = normalizeKeyConfig(key);
-
-                ExtraKeyButton button;
-
-                if (! jobject.has("popup")) {
-                    // no popup
-                    button = new ExtraKeyButton(getSelectedCharMap(), jobject);
-                } else {
-                    // a popup
-                    JSONObject popupJobject = normalizeKeyConfig(jobject.get("popup"));
-                    ExtraKeyButton popup = new ExtraKeyButton(getSelectedCharMap(), popupJobject);
-                    button = new ExtraKeyButton(getSelectedCharMap(), jobject, popup);
-                }
-
-                this.buttons[i][j] = button;
-            }
-        }
-    }
-
-    /**
-     * "hello" -> {"key": "hello"}
-     */
-    private static JSONObject normalizeKeyConfig(Object key) throws JSONException {
-        JSONObject jobject;
-        if (key instanceof String) {
-            jobject = new JSONObject();
-            jobject.put("key", key);
-        } else if (key instanceof JSONObject) {
-            jobject = (JSONObject) key;
-        } else {
-            throw new JSONException("An key in the extra-key matrix must be a string or an object");
-        }
-        return jobject;
-    }
-
-    public ExtraKeyButton[][] getMatrix() {
-        return buttons;
-    }
-
-    /**
-     * HashMap that implements Python dict.get(key, default) function.
-     * Default java.util .get(key) is then the same as .get(key, null);
-     */
-    static class CleverMap<K,V> extends HashMap<K,V> {
-        V get(K key, V defaultValue) {
-            if (containsKey(key))
-                return get(key);
-            else
-                return defaultValue;
-        }
-    }
-
-    static class CharDisplayMap extends CleverMap<String, String> {}
-
-    /**
-     * Keys are displayed in a natural looking way, like "→" for "RIGHT"
-     */
-    static final CharDisplayMap classicArrowsDisplay = new CharDisplayMap() {{
-        // classic arrow keys (for ◀ ▶ ▲ ▼ @see arrowVariationDisplay)
-        put("LEFT", "←"); // U+2190 ← LEFTWARDS ARROW
-        put("RIGHT", "→"); // U+2192 → RIGHTWARDS ARROW
-        put("UP", "↑"); // U+2191 ↑ UPWARDS ARROW
-        put("DOWN", "↓"); // U+2193 ↓ DOWNWARDS ARROW
-    }};
-
-    static final CharDisplayMap wellKnownCharactersDisplay = new CharDisplayMap() {{
-        // well known characters // https://en.wikipedia.org/wiki/{Enter_key, Tab_key, Delete_key}
-        put("ENTER", "↲"); // U+21B2 ↲ DOWNWARDS ARROW WITH TIP LEFTWARDS
-        put("TAB", "↹"); // U+21B9 ↹ LEFTWARDS ARROW TO BAR OVER RIGHTWARDS ARROW TO BAR
-        put("BKSP", "⌫"); // U+232B ⌫ ERASE TO THE LEFT sometimes seen and easy to understand
-        put("DEL", "⌦"); // U+2326 ⌦ ERASE TO THE RIGHT not well known but easy to understand
-        put("DRAWER", "☰"); // U+2630 ☰ TRIGRAM FOR HEAVEN not well known but easy to understand
-        put("KEYBOARD", "⌨"); // U+2328 ⌨ KEYBOARD not well known but easy to understand
-        put("PASTE", "⎘"); // U+2398
-    }};
-
-    static final CharDisplayMap lessKnownCharactersDisplay = new CharDisplayMap() {{
-        // https://en.wikipedia.org/wiki/{Home_key, End_key, Page_Up_and_Page_Down_keys}
-        // home key can mean "goto the beginning of line" or "goto first page" depending on context, hence the diagonal
-        put("HOME", "⇱"); // from IEC 9995 // U+21F1 ⇱ NORTH WEST ARROW TO CORNER
-        put("END", "⇲"); // from IEC 9995 // ⇲ // U+21F2 ⇲ SOUTH EAST ARROW TO CORNER
-        put("PGUP", "⇑"); // no ISO character exists, U+21D1 ⇑ UPWARDS DOUBLE ARROW will do the trick
-        put("PGDN", "⇓"); // no ISO character exists, U+21D3 ⇓ DOWNWARDS DOUBLE ARROW will do the trick
-    }};
-
-    static final CharDisplayMap arrowTriangleVariationDisplay = new CharDisplayMap() {{
-        // alternative to classic arrow keys
-        put("LEFT", "◀"); // U+25C0 ◀ BLACK LEFT-POINTING TRIANGLE
-        put("RIGHT", "▶"); // U+25B6 ▶ BLACK RIGHT-POINTING TRIANGLE
-        put("UP", "▲"); // U+25B2 ▲ BLACK UP-POINTING TRIANGLE
-        put("DOWN", "▼"); // U+25BC ▼ BLACK DOWN-POINTING TRIANGLE
-    }};
-
-    static final CharDisplayMap notKnownIsoCharacters = new CharDisplayMap() {{
-        // Control chars that are more clear as text // https://en.wikipedia.org/wiki/{Function_key, Alt_key, Control_key, Esc_key}
-        // put("FN", "FN"); // no ISO character exists
-        put("CTRL", "⎈"); // ISO character "U+2388 ⎈ HELM SYMBOL" is unknown to people and never printed on computers, however "U+25C7 ◇ WHITE DIAMOND" is a nice presentation, and "^" for terminal app and mac is often used
-        put("ALT", "⎇"); // ISO character "U+2387 ⎇ ALTERNATIVE KEY SYMBOL'" is unknown to people and only printed as the Option key "⌥" on Mac computer
-        put("ESC", "⎋"); // ISO character "U+238B ⎋ BROKEN CIRCLE WITH NORTHWEST ARROW" is unknown to people and not often printed on computers
-    }};
-
-    static final CharDisplayMap nicerLookingDisplay = new CharDisplayMap() {{
-        // nicer looking for most cases
-        put("-", "―"); // U+2015 ― HORIZONTAL BAR
-    }};
-
-    /*
-     * Multiple maps are available to quickly change
-     * the style of the keys.
-     */
-
-    /**
-     * Some classic symbols everybody knows
-     */
-    private static final CharDisplayMap defaultCharDisplay = new CharDisplayMap() {{
-        putAll(classicArrowsDisplay);
-        putAll(wellKnownCharactersDisplay);
-        putAll(nicerLookingDisplay);
-        // all other characters are displayed as themselves
-    }};
-
-    /**
-     * Classic symbols and less known symbols
-     */
-    private static final CharDisplayMap lotsOfArrowsCharDisplay = new CharDisplayMap() {{
-        putAll(classicArrowsDisplay);
-        putAll(wellKnownCharactersDisplay);
-        putAll(lessKnownCharactersDisplay); // NEW
-        putAll(nicerLookingDisplay);
-    }};
-
-    /**
-     * Only arrows
-     */
-    private static final CharDisplayMap arrowsOnlyCharDisplay = new CharDisplayMap() {{
-        putAll(classicArrowsDisplay);
-        // putAll(wellKnownCharactersDisplay); // REMOVED
-        // putAll(lessKnownCharactersDisplay); // REMOVED
-        putAll(nicerLookingDisplay);
-    }};
-
-    /**
-     * Full Iso
-     */
-    private static final CharDisplayMap fullIsoCharDisplay = new CharDisplayMap() {{
-        putAll(classicArrowsDisplay);
-        putAll(wellKnownCharactersDisplay);
-        putAll(lessKnownCharactersDisplay); // NEW
-        putAll(nicerLookingDisplay);
-        putAll(notKnownIsoCharacters); // NEW
-    }};
-
-    /**
-     * Some people might call our keys differently
-     */
-    static private final CharDisplayMap controlCharsAliases = new CharDisplayMap() {{
-        put("ESCAPE", "ESC");
-        put("CONTROL", "CTRL");
-        put("RETURN", "ENTER"); // Technically different keys, but most applications won't see the difference
-        put("FUNCTION", "FN");
-        // no alias for ALT
-
-        // Directions are sometimes written as first and last letter for brevety
-        put("LT", "LEFT");
-        put("RT", "RIGHT");
-        put("DN", "DOWN");
-        // put("UP", "UP"); well, "UP" is already two letters
-
-        put("PAGEUP", "PGUP");
-        put("PAGE_UP", "PGUP");
-        put("PAGE UP", "PGUP");
-        put("PAGE-UP", "PGUP");
-
-        // no alias for HOME
-        // no alias for END
-
-        put("PAGEDOWN", "PGDN");
-        put("PAGE_DOWN", "PGDN");
-        put("PAGE-DOWN", "PGDN");
-
-        put("DELETE", "DEL");
-        put("BACKSPACE", "BKSP");
-
-        // easier for writing in termux.properties
-        put("BACKSLASH", "\\");
-        put("QUOTE", "\"");
-        put("APOSTROPHE", "'");
-    }};
-
-    CharDisplayMap getSelectedCharMap() {
-        switch (style) {
-            case "arrows-only":
-                return arrowsOnlyCharDisplay;
-            case "arrows-all":
-                return lotsOfArrowsCharDisplay;
-            case "all":
-                return fullIsoCharDisplay;
-            case "none":
-                return new CharDisplayMap();
-            default:
-                if (!TermuxPropertyConstants.DEFAULT_IVALUE_EXTRA_KEYS_STYLE.equals(style))
-                    Logger.logError(TermuxSharedProperties.LOG_TAG, "The style \"" + style + "\" for the key \"" + TermuxPropertyConstants.KEY_EXTRA_KEYS_STYLE + "\" is invalid. Using default style instead.");
-                return defaultCharDisplay;
-        }
-    }
-
-    /**
-     * Applies the 'controlCharsAliases' mapping to all the strings in *buttons*
-     * Modifies the array, doesn't return a new one.
-     */
-    public static String replaceAlias(String key) {
-        return controlCharsAliases.get(key, key);
-    }
-}
-
diff --git a/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeysView.java b/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeysView.java
deleted file mode 100644
index 79aceaa17d..0000000000
--- a/app/src/main/java/com/termux/app/terminal/io/extrakeys/ExtraKeysView.java
+++ /dev/null
@@ -1,401 +0,0 @@
-package com.termux.app.terminal.io.extrakeys;
-
-import android.annotation.SuppressLint;
-import android.content.Context;
-import android.os.Build;
-import android.provider.Settings;
-import android.util.AttributeSet;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Set;
-import java.util.concurrent.Executors;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.ScheduledExecutorService;
-
-import java.util.Map;
-import java.util.HashMap;
-import java.util.Arrays;
-import java.util.stream.Collectors;
-
-import android.view.Gravity;
-import android.view.HapticFeedbackConstants;
-import android.view.KeyEvent;
-import android.view.MotionEvent;
-import android.view.View;
-import android.widget.Button;
-import android.widget.GridLayout;
-import android.widget.PopupWindow;
-
-import com.termux.R;
-import com.termux.app.terminal.TermuxTerminalSessionClient;
-import com.termux.app.terminal.TermuxTerminalViewClient;
-import com.termux.view.TerminalView;
-
-import androidx.drawerlayout.widget.DrawerLayout;
-
-/**
- * A view showing extra keys (such as Escape, Ctrl, Alt) not normally available on an Android soft
- * keyboard.
- */
-public final class ExtraKeysView extends GridLayout {
-
-    private static final int TEXT_COLOR = 0xFFFFFFFF;
-    private static final int BUTTON_COLOR = 0x00000000;
-    private static final int INTERESTING_COLOR = 0xFF80DEEA;
-    private static final int BUTTON_PRESSED_COLOR = 0xFF7F7F7F;
-
-    TermuxTerminalViewClient mTermuxTerminalViewClient;
-    TermuxTerminalSessionClient mTermuxTerminalSessionClient;
-
-    public ExtraKeysView(Context context, AttributeSet attrs) {
-        super(context, attrs);
-    }
-
-    static final Map<String, Integer> keyCodesForString = new HashMap<String, Integer>() {{
-        put("SPACE", KeyEvent.KEYCODE_SPACE);
-        put("ESC", KeyEvent.KEYCODE_ESCAPE);
-        put("TAB", KeyEvent.KEYCODE_TAB);
-        put("HOME", KeyEvent.KEYCODE_MOVE_HOME);
-        put("END", KeyEvent.KEYCODE_MOVE_END);
-        put("PGUP", KeyEvent.KEYCODE_PAGE_UP);
-        put("PGDN", KeyEvent.KEYCODE_PAGE_DOWN);
-        put("INS", KeyEvent.KEYCODE_INSERT);
-        put("DEL", KeyEvent.KEYCODE_FORWARD_DEL);
-        put("BKSP", KeyEvent.KEYCODE_DEL);
-        put("UP", KeyEvent.KEYCODE_DPAD_UP);
-        put("LEFT", KeyEvent.KEYCODE_DPAD_LEFT);
-        put("RIGHT", KeyEvent.KEYCODE_DPAD_RIGHT);
-        put("DOWN", KeyEvent.KEYCODE_DPAD_DOWN);
-        put("ENTER", KeyEvent.KEYCODE_ENTER);
-        put("F1", KeyEvent.KEYCODE_F1);
-        put("F2", KeyEvent.KEYCODE_F2);
-        put("F3", KeyEvent.KEYCODE_F3);
-        put("F4", KeyEvent.KEYCODE_F4);
-        put("F5", KeyEvent.KEYCODE_F5);
-        put("F6", KeyEvent.KEYCODE_F6);
-        put("F7", KeyEvent.KEYCODE_F7);
-        put("F8", KeyEvent.KEYCODE_F8);
-        put("F9", KeyEvent.KEYCODE_F9);
-        put("F10", KeyEvent.KEYCODE_F10);
-        put("F11", KeyEvent.KEYCODE_F11);
-        put("F12", KeyEvent.KEYCODE_F12);
-    }};
-
-    @SuppressLint("RtlHardcoded")
-    private void sendKey(View view, String keyName, boolean forceCtrlDown, boolean forceLeftAltDown) {
-        TerminalView terminalView = view.findViewById(R.id.terminal_view);
-        if ("KEYBOARD".equals(keyName)) {
-            if(mTermuxTerminalViewClient != null)
-                mTermuxTerminalViewClient.onToggleSoftKeyboardRequest();
-        } else if ("DRAWER".equals(keyName)) {
-            DrawerLayout drawer = view.findViewById(R.id.drawer_layout);
-            drawer.openDrawer(Gravity.LEFT);
-        } else if ("PASTE".equals(keyName)) {
-            if(mTermuxTerminalSessionClient != null)
-                mTermuxTerminalSessionClient.onPasteTextFromClipboard(null);
-        } else if (keyCodesForString.containsKey(keyName)) {
-            Integer keyCode = keyCodesForString.get(keyName);
-            if (keyCode == null) return;
-            int metaState = 0;
-            if (forceCtrlDown) {
-                metaState |= KeyEvent.META_CTRL_ON | KeyEvent.META_CTRL_LEFT_ON;
-            }
-            if (forceLeftAltDown) {
-                metaState |= KeyEvent.META_ALT_ON | KeyEvent.META_ALT_LEFT_ON;
-            }
-            KeyEvent keyEvent = new KeyEvent(0, 0, KeyEvent.ACTION_UP, keyCode, 0, metaState);
-            terminalView.onKeyDown(keyCode, keyEvent);
-        } else {
-            // not a control char
-            keyName.codePoints().forEach(codePoint -> {
-                terminalView.inputCodePoint(codePoint, forceCtrlDown, forceLeftAltDown);
-            });
-        }
-    }
-
-    private void sendKey(View view, ExtraKeyButton buttonInfo) {
-        if (buttonInfo.isMacro()) {
-            String[] keys = buttonInfo.getKey().split(" ");
-            boolean ctrlDown = false;
-            boolean altDown = false;
-            for (String key : keys) {
-                if ("CTRL".equals(key)) {
-                    ctrlDown = true;
-                } else if ("ALT".equals(key)) {
-                    altDown = true;
-                } else {
-                    sendKey(view, key, ctrlDown, altDown);
-                    ctrlDown = false;
-                    altDown = false;
-                }
-            }
-        } else {
-            sendKey(view, buttonInfo.getKey(), false, false);
-        }
-    }
-
-    public enum SpecialButton {
-        CTRL, ALT, FN
-    }
-
-    private static class SpecialButtonState {
-        boolean isOn = false;
-        boolean isActive = false;
-        List<Button> buttons = new ArrayList<>();
-
-        void setIsActive(boolean value) {
-            isActive = value;
-            buttons.forEach(button -> button.setTextColor(value ? INTERESTING_COLOR : TEXT_COLOR));
-        }
-    }
-
-    private final Map<SpecialButton, SpecialButtonState> specialButtons = new HashMap<SpecialButton, SpecialButtonState>() {{
-        put(SpecialButton.CTRL, new SpecialButtonState());
-        put(SpecialButton.ALT, new SpecialButtonState());
-        put(SpecialButton.FN, new SpecialButtonState());
-    }};
-
-    private final Set<String> specialButtonsKeys = specialButtons.keySet().stream().map(Enum::name).collect(Collectors.toSet());
-
-    private boolean isSpecialButton(ExtraKeyButton button) {
-        return specialButtonsKeys.contains(button.getKey());
-    }
-
-    private ScheduledExecutorService scheduledExecutor;
-    private PopupWindow popupWindow;
-    private int longPressCount;
-
-    public boolean readSpecialButton(SpecialButton name) {
-        SpecialButtonState state = specialButtons.get(name);
-        if (state == null)
-            throw new RuntimeException("Must be a valid special button (see source)");
-
-        if (!state.isOn || !state.isActive)
-            return false;
-
-        state.setIsActive(false);
-
-        return true;
-    }
-
-    private Button createSpecialButton(String buttonKey, boolean needUpdate) {
-        SpecialButtonState state = specialButtons.get(SpecialButton.valueOf(buttonKey));
-        if (state == null) return null;
-        state.isOn = true;
-        Button button = new Button(getContext(), null, android.R.attr.buttonBarButtonStyle);
-        button.setTextColor(state.isActive ? INTERESTING_COLOR : TEXT_COLOR);
-        if (needUpdate) {
-            state.buttons.add(button);
-        }
-        return button;
-    }
-
-    void popup(View view, ExtraKeyButton extraButton) {
-        int width = view.getMeasuredWidth();
-        int height = view.getMeasuredHeight();
-        Button button;
-        if (isSpecialButton(extraButton)) {
-            button = createSpecialButton(extraButton.getKey(), false);
-            if (button == null) return;
-        } else {
-            button = new Button(getContext(), null, android.R.attr.buttonBarButtonStyle);
-            button.setTextColor(TEXT_COLOR);
-        }
-        button.setText(extraButton.getDisplay());
-        button.setPadding(0, 0, 0, 0);
-        button.setMinHeight(0);
-        button.setMinWidth(0);
-        button.setMinimumWidth(0);
-        button.setMinimumHeight(0);
-        button.setWidth(width);
-        button.setHeight(height);
-        button.setBackgroundColor(BUTTON_PRESSED_COLOR);
-        popupWindow = new PopupWindow(this);
-        popupWindow.setWidth(LayoutParams.WRAP_CONTENT);
-        popupWindow.setHeight(LayoutParams.WRAP_CONTENT);
-        popupWindow.setContentView(button);
-        popupWindow.setOutsideTouchable(true);
-        popupWindow.setFocusable(false);
-        popupWindow.showAsDropDown(view, 0, -2 * height);
-    }
-
-    /**
-     * General util function to compute the longest column length in a matrix.
-     */
-    static int maximumLength(Object[][] matrix) {
-        int m = 0;
-        for (Object[] row : matrix)
-            m = Math.max(m, row.length);
-        return m;
-    }
-
-    /**
-     * Reload the view given parameters in termux.properties
-     *
-     * @param infos matrix as defined in termux.properties extrakeys
-     * Can Contain The Strings CTRL ALT TAB FN ENTER LEFT RIGHT UP DOWN or normal strings
-     * Some aliases are possible like RETURN for ENTER, LT for LEFT and more (@see controlCharsAliases for the whole list).
-     * Any string of length > 1 in total Uppercase will print a warning
-     *
-     * Examples:
-     * "ENTER" will trigger the ENTER keycode
-     * "LEFT" will trigger the LEFT keycode and be displayed as "←"
-     * "→" will input a "→" character
-     * "−" will input a "−" character
-     * "-_-" will input the string "-_-"
-     */
-    @SuppressLint("ClickableViewAccessibility")
-    public void reload(ExtraKeysInfo infos) {
-        if (infos == null)
-            return;
-
-        for(SpecialButtonState state : specialButtons.values())
-            state.buttons = new ArrayList<>();
-
-        removeAllViews();
-
-        ExtraKeyButton[][] buttons = infos.getMatrix();
-
-        setRowCount(buttons.length);
-        setColumnCount(maximumLength(buttons));
-
-        for (int row = 0; row < buttons.length; row++) {
-            for (int col = 0; col < buttons[row].length; col++) {
-                final ExtraKeyButton buttonInfo = buttons[row][col];
-
-                Button button;
-                if (isSpecialButton(buttonInfo)) {
-                    button = createSpecialButton(buttonInfo.getKey(), true);
-                    if (button == null) return;
-                } else {
-                    button = new Button(getContext(), null, android.R.attr.buttonBarButtonStyle);
-                }
-
-                button.setText(buttonInfo.getDisplay());
-                button.setTextColor(TEXT_COLOR);
-                button.setPadding(0, 0, 0, 0);
-
-                final Button finalButton = button;
-                button.setOnClickListener(v -> {
-                    if (Settings.System.getInt(getContext().getContentResolver(),
-                        Settings.System.HAPTIC_FEEDBACK_ENABLED, 0) != 0) {
-
-                        if (Build.VERSION.SDK_INT >= 28) {
-                            finalButton.performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP);
-                        } else {
-                            // Perform haptic feedback only if no total silence mode enabled.
-                            if (Settings.Global.getInt(getContext().getContentResolver(), "zen_mode", 0) != 2) {
-                                finalButton.performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP);
-                            }
-                        }
-                    }
-
-                    View root = getRootView();
-                    if (isSpecialButton(buttonInfo)) {
-                        SpecialButtonState state = specialButtons.get(SpecialButton.valueOf(buttonInfo.getKey()));
-                        if (state == null) return;
-                        state.setIsActive(!state.isActive);
-                    } else {
-                        sendKey(root, buttonInfo);
-                    }
-                });
-
-                button.setOnTouchListener((v, event) -> {
-                    final View root = getRootView();
-                    switch (event.getAction()) {
-                        case MotionEvent.ACTION_DOWN:
-                            longPressCount = 0;
-                            v.setBackgroundColor(BUTTON_PRESSED_COLOR);
-                            if (scheduledExecutor != null) {
-                                scheduledExecutor.shutdownNow();
-                                scheduledExecutor = null;
-                            }
-                            if (Arrays.asList("UP", "DOWN", "LEFT", "RIGHT", "BKSP", "DEL").contains(buttonInfo.getKey())) {
-                                // autorepeat
-                                scheduledExecutor = Executors.newSingleThreadScheduledExecutor();
-                                scheduledExecutor.scheduleWithFixedDelay(() -> {
-                                    longPressCount++;
-                                    sendKey(root, buttonInfo);
-                                }, 400, 80, TimeUnit.MILLISECONDS);
-                            }
-                            return true;
-
-                        case MotionEvent.ACTION_MOVE:
-                            if (buttonInfo.getPopup() != null) {
-                                if (popupWindow == null && event.getY() < 0) {
-                                    if (scheduledExecutor != null) {
-                                        scheduledExecutor.shutdownNow();
-                                        scheduledExecutor = null;
-                                    }
-                                    v.setBackgroundColor(BUTTON_COLOR);
-                                    popup(v, buttonInfo.getPopup());
-                                }
-                                if (popupWindow != null && event.getY() > 0) {
-                                    v.setBackgroundColor(BUTTON_PRESSED_COLOR);
-                                    popupWindow.dismiss();
-                                    popupWindow = null;
-                                }
-                            }
-                            return true;
-
-                        case MotionEvent.ACTION_CANCEL:
-                            v.setBackgroundColor(BUTTON_COLOR);
-                            if (scheduledExecutor != null) {
-                                scheduledExecutor.shutdownNow();
-                                scheduledExecutor = null;
-                            }
-                            return true;
-                        case MotionEvent.ACTION_UP:
-                            v.setBackgroundColor(BUTTON_COLOR);
-                            if (scheduledExecutor != null) {
-                                scheduledExecutor.shutdownNow();
-                                scheduledExecutor = null;
-                            }
-                            if (longPressCount == 0 || popupWindow != null) {
-                                if (popupWindow != null) {
-                                    popupWindow.setContentView(null);
-                                    popupWindow.dismiss();
-                                    popupWindow = null;
-                                    if (buttonInfo.getPopup() != null) {
-                                        if (isSpecialButton(buttonInfo.getPopup())) {
-                                            SpecialButtonState state = specialButtons.get(SpecialButton.valueOf(buttonInfo.getPopup().getKey()));
-                                            if (state == null) return true;
-                                            state.setIsActive(!state.isActive);
-                                        } else {
-                                            sendKey(root, buttonInfo.getPopup());
-                                        }
-                                    }
-                                } else {
-                                    v.performClick();
-                                }
-                            }
-                            return true;
-
-                        default:
-                            return true;
-                    }
-                });
-
-                LayoutParams param = new GridLayout.LayoutParams();
-                param.width = 0;
-                param.height = 0;
-                param.setMargins(0, 0, 0, 0);
-                param.columnSpec = GridLayout.spec(col, GridLayout.FILL, 1.f);
-                param.rowSpec = GridLayout.spec(row, GridLayout.FILL, 1.f);
-                button.setLayoutParams(param);
-
-                addView(button);
-            }
-        }
-    }
-
-    public void setTermuxTerminalViewClient(TermuxTerminalViewClient termuxTerminalViewClient) {
-        this.mTermuxTerminalViewClient = termuxTerminalViewClient;
-    }
-
-    public void setTermuxTerminalSessionClient(TermuxTerminalSessionClient termuxTerminalSessionClient) {
-        this.mTermuxTerminalSessionClient = termuxTerminalSessionClient;
-    }
-
-}
diff --git a/app/src/main/res/layout/view_terminal_toolbar_extra_keys.xml b/app/src/main/res/layout/view_terminal_toolbar_extra_keys.xml
index fbefe1ec6e..21a25c8100 100644
--- a/app/src/main/res/layout/view_terminal_toolbar_extra_keys.xml
+++ b/app/src/main/res/layout/view_terminal_toolbar_extra_keys.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.termux.app.terminal.io.extrakeys.ExtraKeysView xmlns:android="http://schemas.android.com/apk/res/android"
+<com.termux.shared.terminal.io.extrakeys.ExtraKeysView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/terminal_toolbar_extra_keys"
     style="?android:attr/buttonBarStyle"
     android:layout_width="match_parent"
diff --git a/termux-shared/src/main/java/com/termux/shared/terminal/io/TerminalExtraKeys.java b/termux-shared/src/main/java/com/termux/shared/terminal/io/TerminalExtraKeys.java
new file mode 100644
index 0000000000..faac49771d
--- /dev/null
+++ b/termux-shared/src/main/java/com/termux/shared/terminal/io/TerminalExtraKeys.java
@@ -0,0 +1,77 @@
+package com.termux.shared.terminal.io;
+
+import android.view.KeyEvent;
+import android.view.View;
+import android.widget.Button;
+
+import androidx.annotation.NonNull;
+
+import com.termux.shared.terminal.io.extrakeys.ExtraKeyButton;
+import com.termux.shared.terminal.io.extrakeys.ExtraKeysView;
+import com.termux.shared.terminal.io.extrakeys.SpecialButton;
+import com.termux.view.TerminalView;
+
+import static com.termux.shared.terminal.io.extrakeys.ExtraKeysConstants.PRIMARY_KEY_CODES_FOR_STRINGS;
+
+
+public class TerminalExtraKeys implements ExtraKeysView.IExtraKeysView {
+
+    private final TerminalView mTerminalView;
+
+    public TerminalExtraKeys(@NonNull TerminalView terminalView) {
+        mTerminalView = terminalView;
+    }
+
+    @Override
+    public void onExtraKeyButtonClick(View view, ExtraKeyButton buttonInfo, Button button) {
+        if (buttonInfo.isMacro()) {
+            String[] keys = buttonInfo.getKey().split(" ");
+            boolean ctrlDown = false;
+            boolean altDown = false;
+            boolean shiftDown = false;
+            boolean fnDown = false;
+            for (String key : keys) {
+                if (SpecialButton.CTRL.getKey().equals(key)) {
+                    ctrlDown = true;
+                } else if (SpecialButton.ALT.getKey().equals(key)) {
+                    altDown = true;
+                } else if (SpecialButton.SHIFT.getKey().equals(key)) {
+                    shiftDown = true;
+                } else if (SpecialButton.FN.getKey().equals(key)) {
+                    fnDown = true;
+                } else {
+                    onTerminalExtraKeyButtonClick(view, key, ctrlDown, altDown, shiftDown, fnDown);
+                    ctrlDown = false; altDown = false; shiftDown = false; fnDown = false;
+                }
+            }
+        } else {
+            onTerminalExtraKeyButtonClick(view, buttonInfo.getKey(), false, false, false, false);
+        }
+    }
+
+    protected void onTerminalExtraKeyButtonClick(View view, String key, boolean ctrlDown, boolean altDown, boolean shiftDown, boolean fnDown) {
+        if (PRIMARY_KEY_CODES_FOR_STRINGS.containsKey(key)) {
+            Integer keyCode = PRIMARY_KEY_CODES_FOR_STRINGS.get(key);
+            if (keyCode == null) return;
+            int metaState = 0;
+            if (ctrlDown) metaState |= KeyEvent.META_CTRL_ON | KeyEvent.META_CTRL_LEFT_ON;
+            if (altDown) metaState |= KeyEvent.META_ALT_ON | KeyEvent.META_ALT_LEFT_ON;
+            if (shiftDown) metaState |= KeyEvent.META_SHIFT_ON | KeyEvent.META_SHIFT_LEFT_ON;
+            if (fnDown) metaState |= KeyEvent.META_FUNCTION_ON;
+
+            KeyEvent keyEvent = new KeyEvent(0, 0, KeyEvent.ACTION_UP, keyCode, 0, metaState);
+            mTerminalView.onKeyDown(keyCode, keyEvent);
+        } else {
+            // not a control char
+            key.codePoints().forEach(codePoint -> {
+                mTerminalView.inputCodePoint(codePoint, ctrlDown, altDown);
+            });
+        }
+    }
+
+    @Override
+    public boolean performExtraKeyButtonHapticFeedback(View view, ExtraKeyButton buttonInfo, Button button) {
+        return false;
+    }
+
+}
diff --git a/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeyButton.java b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeyButton.java
new file mode 100644
index 0000000000..e22879857c
--- /dev/null
+++ b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeyButton.java
@@ -0,0 +1,151 @@
+package com.termux.shared.terminal.io.extrakeys;
+
+import android.text.TextUtils;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.Arrays;
+import java.util.stream.Collectors;
+
+public class ExtraKeyButton {
+
+    /** The key name for the name of the extra key if using a dict to define the extra key. {key: name, ...} */
+    public static final String KEY_KEY_NAME = "key";
+
+    /** The key name for the macro value of the extra key if using a dict to define the extra key. {macro: value, ...} */
+    public static final String KEY_MACRO = "macro";
+
+    /** The key name for the alternate display name of the extra key if using a dict to define the extra key. {display: name, ...} */
+    public static final String KEY_DISPLAY_NAME = "display";
+
+    /** The key name for the nested dict to define popup extra key info if using a dict to define the extra key. {popup: {key: name, ...}, ...} */
+    public static final String KEY_POPUP = "popup";
+
+
+    /**
+     * The key that will be sent to the terminal, either a control character, like defined in
+     * {@link ExtraKeysConstants#PRIMARY_KEY_CODES_FOR_STRINGS} (LEFT, RIGHT, PGUP...) or some text.
+     */
+    private final String key;
+
+    /**
+     * If the key is a macro, i.e. a sequence of keys separated by space.
+     */
+    private final boolean macro;
+
+    /**
+     * The text that will be displayed on the button.
+     */
+    private final String display;
+
+    /**
+     * The {@link ExtraKeyButton} containing the information of the popup button (triggered by swipe up).
+     */
+    @Nullable
+    private final ExtraKeyButton popup;
+
+
+    /**
+     * Initialize a {@link ExtraKeyButton}.
+     *
+     * @param config The {@link JSONObject} containing the info to create the {@link ExtraKeyButton}.
+     * @param extraKeyDisplayMap The {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the
+     *                           display text mapping for the keys if a custom value is not defined
+     *                           by {@link #KEY_DISPLAY_NAME}.
+     * @param extraKeyAliasMap The {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the
+     *                           aliases for the actual key names.
+     */
+    public ExtraKeyButton(@NonNull JSONObject config,
+                          @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyDisplayMap,
+                          @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyAliasMap) throws JSONException {
+        this(config, null, extraKeyDisplayMap, extraKeyAliasMap);
+    }
+
+    /**
+     * Initialize a {@link ExtraKeyButton}.
+     *
+     * @param config The {@link JSONObject} containing the info to create the {@link ExtraKeyButton}.
+     * @param popup The {@link ExtraKeyButton} optional {@link #popup} button.
+     * @param extraKeyDisplayMap The {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the
+     *                           display text mapping for the keys if a custom value is not defined
+     *                           by {@link #KEY_DISPLAY_NAME}.
+     * @param extraKeyAliasMap The {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the
+     *                           aliases for the actual key names.
+     */
+    public ExtraKeyButton(@NonNull JSONObject config, @Nullable ExtraKeyButton popup,
+                          @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyDisplayMap,
+                          @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyAliasMap) throws JSONException {
+        String keyFromConfig = getStringFromJson(config, KEY_KEY_NAME);
+        String macroFromConfig = getStringFromJson(config, KEY_MACRO);
+        String[] keys;
+        if (keyFromConfig != null && macroFromConfig != null) {
+            throw new JSONException("Both key and macro can't be set for the same key. key: \"" + keyFromConfig + "\", macro: \"" + macroFromConfig + "\"");
+        } else if (keyFromConfig != null) {
+            keys = new String[]{keyFromConfig};
+            this.macro = false;
+        } else if (macroFromConfig != null) {
+            keys = macroFromConfig.split(" ");
+            this.macro = true;
+        } else {
+            throw new JSONException("All keys have to specify either key or macro");
+        }
+
+        for (int i = 0; i < keys.length; i++) {
+            keys[i] = replaceAlias(extraKeyAliasMap, keys[i]);
+        }
+
+        this.key = TextUtils.join(" ", keys);
+
+        String displayFromConfig = getStringFromJson(config, KEY_DISPLAY_NAME);
+        if (displayFromConfig != null) {
+            this.display = displayFromConfig;
+        } else {
+            this.display = Arrays.stream(keys)
+                .map(key -> extraKeyDisplayMap.get(key, key))
+                .collect(Collectors.joining(" "));
+        }
+
+        this.popup = popup;
+    }
+
+    public String getStringFromJson(@NonNull JSONObject config, @NonNull String key) {
+        try {
+            return config.getString(key);
+        } catch (JSONException e) {
+            return null;
+        }
+    }
+
+    /** Get {@link #key}. */
+    public String getKey() {
+        return key;
+    }
+
+    /** Check whether a {@link #macro} is defined or not. */
+    public boolean isMacro() {
+        return macro;
+    }
+
+    /** Get {@link #display}. */
+    public String getDisplay() {
+        return display;
+    }
+
+    /** Get {@link #popup}. */
+    @Nullable
+    public ExtraKeyButton getPopup() {
+        return popup;
+    }
+
+    /**
+     * Replace the alias with its actual key name if found in extraKeyAliasMap.
+     */
+    public static String replaceAlias(@NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyAliasMap, String key) {
+        return extraKeyAliasMap.get(key, key);
+    }
+
+}
diff --git a/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysConstants.java b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysConstants.java
new file mode 100644
index 0000000000..ae678a71cb
--- /dev/null
+++ b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysConstants.java
@@ -0,0 +1,207 @@
+package com.termux.shared.terminal.io.extrakeys;
+
+import android.view.KeyEvent;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class ExtraKeysConstants {
+
+    /** Defines the repetitive keys that can be passed to {@link ExtraKeysView#setRepetitiveKeys(List)}. */
+    public static List<String> PRIMARY_REPETITIVE_KEYS = Arrays.asList("UP", "DOWN", "LEFT", "RIGHT", "BKSP", "DEL");
+
+
+
+    /** Defines the {@link KeyEvent} for common keys. */
+    public static Map<String, Integer> PRIMARY_KEY_CODES_FOR_STRINGS = new HashMap<String, Integer>() {{
+        put("SPACE", KeyEvent.KEYCODE_SPACE);
+        put("ESC", KeyEvent.KEYCODE_ESCAPE);
+        put("TAB", KeyEvent.KEYCODE_TAB);
+        put("HOME", KeyEvent.KEYCODE_MOVE_HOME);
+        put("END", KeyEvent.KEYCODE_MOVE_END);
+        put("PGUP", KeyEvent.KEYCODE_PAGE_UP);
+        put("PGDN", KeyEvent.KEYCODE_PAGE_DOWN);
+        put("INS", KeyEvent.KEYCODE_INSERT);
+        put("DEL", KeyEvent.KEYCODE_FORWARD_DEL);
+        put("BKSP", KeyEvent.KEYCODE_DEL);
+        put("UP", KeyEvent.KEYCODE_DPAD_UP);
+        put("LEFT", KeyEvent.KEYCODE_DPAD_LEFT);
+        put("RIGHT", KeyEvent.KEYCODE_DPAD_RIGHT);
+        put("DOWN", KeyEvent.KEYCODE_DPAD_DOWN);
+        put("ENTER", KeyEvent.KEYCODE_ENTER);
+        put("F1", KeyEvent.KEYCODE_F1);
+        put("F2", KeyEvent.KEYCODE_F2);
+        put("F3", KeyEvent.KEYCODE_F3);
+        put("F4", KeyEvent.KEYCODE_F4);
+        put("F5", KeyEvent.KEYCODE_F5);
+        put("F6", KeyEvent.KEYCODE_F6);
+        put("F7", KeyEvent.KEYCODE_F7);
+        put("F8", KeyEvent.KEYCODE_F8);
+        put("F9", KeyEvent.KEYCODE_F9);
+        put("F10", KeyEvent.KEYCODE_F10);
+        put("F11", KeyEvent.KEYCODE_F11);
+        put("F12", KeyEvent.KEYCODE_F12);
+    }};
+
+
+
+    /**
+     * HashMap that implements Python dict.get(key, default) function.
+     * Default java.util .get(key) is then the same as .get(key, null);
+     */
+    static class CleverMap<K,V> extends HashMap<K,V> {
+        V get(K key, V defaultValue) {
+            if (containsKey(key))
+                return get(key);
+            else
+                return defaultValue;
+        }
+    }
+
+    public static class ExtraKeyDisplayMap extends CleverMap<String, String> {}
+
+
+
+    /*
+     * Multiple maps are available to quickly change
+     * the style of the keys.
+     */
+
+    public static class EXTRA_KEY_DISPLAY_MAPS {
+        /**
+         * Keys are displayed in a natural looking way, like "→" for "RIGHT"
+         */
+        public static final ExtraKeyDisplayMap CLASSIC_ARROWS_DISPLAY = new ExtraKeyDisplayMap() {{
+            // classic arrow keys (for ◀ ▶ ▲ ▼ @see arrowVariationDisplay)
+            put("LEFT", "←"); // U+2190 ← LEFTWARDS ARROW
+            put("RIGHT", "→"); // U+2192 → RIGHTWARDS ARROW
+            put("UP", "↑"); // U+2191 ↑ UPWARDS ARROW
+            put("DOWN", "↓"); // U+2193 ↓ DOWNWARDS ARROW
+        }};
+
+        public static final ExtraKeyDisplayMap WELL_KNOWN_CHARACTERS_DISPLAY = new ExtraKeyDisplayMap() {{
+            // well known characters // https://en.wikipedia.org/wiki/{Enter_key, Tab_key, Delete_key}
+            put("ENTER", "↲"); // U+21B2 ↲ DOWNWARDS ARROW WITH TIP LEFTWARDS
+            put("TAB", "↹"); // U+21B9 ↹ LEFTWARDS ARROW TO BAR OVER RIGHTWARDS ARROW TO BAR
+            put("BKSP", "⌫"); // U+232B ⌫ ERASE TO THE LEFT sometimes seen and easy to understand
+            put("DEL", "⌦"); // U+2326 ⌦ ERASE TO THE RIGHT not well known but easy to understand
+            put("DRAWER", "☰"); // U+2630 ☰ TRIGRAM FOR HEAVEN not well known but easy to understand
+            put("KEYBOARD", "⌨"); // U+2328 ⌨ KEYBOARD not well known but easy to understand
+            put("PASTE", "⎘"); // U+2398
+        }};
+
+        public static final ExtraKeyDisplayMap LESS_KNOWN_CHARACTERS_DISPLAY = new ExtraKeyDisplayMap() {{
+            // https://en.wikipedia.org/wiki/{Home_key, End_key, Page_Up_and_Page_Down_keys}
+            // home key can mean "goto the beginning of line" or "goto first page" depending on context, hence the diagonal
+            put("HOME", "⇱"); // from IEC 9995 // U+21F1 ⇱ NORTH WEST ARROW TO CORNER
+            put("END", "⇲"); // from IEC 9995 // ⇲ // U+21F2 ⇲ SOUTH EAST ARROW TO CORNER
+            put("PGUP", "⇑"); // no ISO character exists, U+21D1 ⇑ UPWARDS DOUBLE ARROW will do the trick
+            put("PGDN", "⇓"); // no ISO character exists, U+21D3 ⇓ DOWNWARDS DOUBLE ARROW will do the trick
+        }};
+
+        public static final ExtraKeyDisplayMap ARROW_TRIANGLE_VARIATION_DISPLAY = new ExtraKeyDisplayMap() {{
+            // alternative to classic arrow keys
+            put("LEFT", "◀"); // U+25C0 ◀ BLACK LEFT-POINTING TRIANGLE
+            put("RIGHT", "▶"); // U+25B6 ▶ BLACK RIGHT-POINTING TRIANGLE
+            put("UP", "▲"); // U+25B2 ▲ BLACK UP-POINTING TRIANGLE
+            put("DOWN", "▼"); // U+25BC ▼ BLACK DOWN-POINTING TRIANGLE
+        }};
+
+        public static final ExtraKeyDisplayMap NOT_KNOWN_ISO_CHARACTERS = new ExtraKeyDisplayMap() {{
+            // Control chars that are more clear as text // https://en.wikipedia.org/wiki/{Function_key, Alt_key, Control_key, Esc_key}
+            // put("FN", "FN"); // no ISO character exists
+            put("CTRL", "⎈"); // ISO character "U+2388 ⎈ HELM SYMBOL" is unknown to people and never printed on computers, however "U+25C7 ◇ WHITE DIAMOND" is a nice presentation, and "^" for terminal app and mac is often used
+            put("ALT", "⎇"); // ISO character "U+2387 ⎇ ALTERNATIVE KEY SYMBOL'" is unknown to people and only printed as the Option key "⌥" on Mac computer
+            put("ESC", "⎋"); // ISO character "U+238B ⎋ BROKEN CIRCLE WITH NORTHWEST ARROW" is unknown to people and not often printed on computers
+        }};
+
+        public static final ExtraKeyDisplayMap NICER_LOOKING_DISPLAY = new ExtraKeyDisplayMap() {{
+            // nicer looking for most cases
+            put("-", "―"); // U+2015 ― HORIZONTAL BAR
+        }};
+
+        /**
+         * Full Iso
+         */
+        public static final ExtraKeyDisplayMap FULL_ISO_CHAR_DISPLAY = new ExtraKeyDisplayMap() {{
+            putAll(CLASSIC_ARROWS_DISPLAY);
+            putAll(WELL_KNOWN_CHARACTERS_DISPLAY);
+            putAll(LESS_KNOWN_CHARACTERS_DISPLAY); // NEW
+            putAll(NICER_LOOKING_DISPLAY);
+            putAll(NOT_KNOWN_ISO_CHARACTERS); // NEW
+        }};
+
+        /**
+         * Only arrows
+         */
+        public static final ExtraKeyDisplayMap ARROWS_ONLY_CHAR_DISPLAY = new ExtraKeyDisplayMap() {{
+            putAll(CLASSIC_ARROWS_DISPLAY);
+            // putAll(wellKnownCharactersDisplay); // REMOVED
+            // putAll(lessKnownCharactersDisplay); // REMOVED
+            putAll(NICER_LOOKING_DISPLAY);
+        }};
+
+        /**
+         * Classic symbols and less known symbols
+         */
+        public static final ExtraKeyDisplayMap LOTS_OF_ARROWS_CHAR_DISPLAY = new ExtraKeyDisplayMap() {{
+            putAll(CLASSIC_ARROWS_DISPLAY);
+            putAll(WELL_KNOWN_CHARACTERS_DISPLAY);
+            putAll(LESS_KNOWN_CHARACTERS_DISPLAY); // NEW
+            putAll(NICER_LOOKING_DISPLAY);
+        }};
+
+        /**
+         * Some classic symbols everybody knows
+         */
+        public static final ExtraKeyDisplayMap DEFAULT_CHAR_DISPLAY = new ExtraKeyDisplayMap() {{
+            putAll(CLASSIC_ARROWS_DISPLAY);
+            putAll(WELL_KNOWN_CHARACTERS_DISPLAY);
+            putAll(NICER_LOOKING_DISPLAY);
+            // all other characters are displayed as themselves
+        }};
+
+    }
+
+
+
+    /**
+     * Aliases for the keys
+     */
+    public static final ExtraKeyDisplayMap CONTROL_CHARS_ALIASES = new ExtraKeyDisplayMap() {{
+        put("ESCAPE", "ESC");
+        put("CONTROL", "CTRL");
+        put("RETURN", "ENTER"); // Technically different keys, but most applications won't see the difference
+        put("FUNCTION", "FN");
+        // no alias for ALT
+
+        // Directions are sometimes written as first and last letter for brevety
+        put("LT", "LEFT");
+        put("RT", "RIGHT");
+        put("DN", "DOWN");
+        // put("UP", "UP"); well, "UP" is already two letters
+
+        put("PAGEUP", "PGUP");
+        put("PAGE_UP", "PGUP");
+        put("PAGE UP", "PGUP");
+        put("PAGE-UP", "PGUP");
+
+        // no alias for HOME
+        // no alias for END
+
+        put("PAGEDOWN", "PGDN");
+        put("PAGE_DOWN", "PGDN");
+        put("PAGE-DOWN", "PGDN");
+
+        put("DELETE", "DEL");
+        put("BACKSPACE", "BKSP");
+
+        // easier for writing in termux.properties
+        put("BACKSLASH", "\\");
+        put("QUOTE", "\"");
+        put("APOSTROPHE", "'");
+    }};
+
+}
diff --git a/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysInfo.java b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysInfo.java
new file mode 100644
index 0000000000..7bf47d7d40
--- /dev/null
+++ b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysInfo.java
@@ -0,0 +1,211 @@
+package com.termux.shared.terminal.io.extrakeys;
+
+import android.view.View;
+import android.widget.Button;
+
+import androidx.annotation.NonNull;
+
+import com.termux.shared.terminal.io.extrakeys.ExtraKeysConstants.EXTRA_KEY_DISPLAY_MAPS;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+/**
+ * A {@link Class} that defines the info needed by {@link ExtraKeysView} to display the extra key
+ * views.
+ *
+ * The {@code propertiesInfo} passed to the constructors of this class must be json array of arrays.
+ * Each array element of the json array will be considered a separate row of keys.
+ * Each key can either be simple string that defines the name of the key or a json dict that defines
+ * advance info for the key. The syntax can be `'KEY'` or `{key: 'KEY'}`.
+ * For example `HOME` or `{key: 'HOME', ...}.
+ *
+ * In advance json dict mode, the key can also be a sequence of space separated keys instead of one
+ * key. This can be done by replacing `key` key/value pair of the dict with a `macro` key/value pair.
+ * The syntax is `{macro: 'KEY COMBINATION'}`. For example {macro: 'HOME RIGHT', ...}.
+ *
+ * In advance json dict mode, you can define a nested json dict with the `popup` key which will be
+ * used as the popup key and will be triggered on swipe up. The syntax can be
+ * `{key: 'KEY', popup: 'POPUP_KEY'}` or `{key: 'KEY', popup: {macro: 'KEY COMBINATION', display: 'Key combo'}}`.
+ * For example `{key: 'HOME', popup: {KEY: 'END', ...}, ...}`.
+ *
+ * In advance json dict mode, the key can also have a custom display name that can be used as the
+ * text to display on the button by defining the `display` key. The syntax is `{display: 'DISPLAY'}`.
+ * For example {display: 'Custom name', ...}.
+ *
+ * Examples:
+ * {@code
+ * # Empty:
+ * []
+ *
+ * # Single row:
+ * [[ESC, TAB, CTRL, ALT, {key: '-', popup: '|'}, DOWN, UP]]
+ *
+ * # 2 row:
+ * [['ESC','/',{key: '-', popup: '|'},'HOME','UP','END','PGUP'],
+ * ['TAB','CTRL','ALT','LEFT','DOWN','RIGHT','PGDN']]
+ *
+ * # Advance:
+ * [[
+ *   {key: ESC, popup: {macro: "CTRL f d", display: "tmux exit"}},
+ *   {key: CTRL, popup: {macro: "CTRL f BKSP", display: "tmux ←"}},
+ *   {key: ALT, popup: {macro: "CTRL f TAB", display: "tmux →"}},
+ *   {key: TAB, popup: {macro: "ALT a", display: A-a}},
+ *   {key: LEFT, popup: HOME},
+ *   {key: DOWN, popup: PGDN},
+ *   {key: UP, popup: PGUP},
+ *   {key: RIGHT, popup: END},
+ *   {macro: "ALT j", display: A-j, popup: {macro: "ALT g", display: A-g}},
+ *   {key: KEYBOARD, popup: {macro: "CTRL d", display: exit}}
+ * ]]
+ *
+ * }
+ *
+ * Aliases are also allowed for the keys that you can pass as {@code extraKeyAliasMap}. Check
+ * {@link ExtraKeysConstants#CONTROL_CHARS_ALIASES}.
+ *
+ * Its up to the {@link ExtraKeysView.IExtraKeysView} client on how to handle individual key values
+ * of an {@link ExtraKeyButton}. They are sent as is via
+ * {@link ExtraKeysView.IExtraKeysView#onExtraKeyButtonClick(View, ExtraKeyButton, Button)}. The
+ * {@link com.termux.shared.terminal.io.TerminalExtraKeys} which is an implementation of the interface,
+ * checks if the key is one of {@link ExtraKeysConstants#PRIMARY_KEY_CODES_FOR_STRINGS} and generates
+ * a {@link android.view.KeyEvent} for it, and if its not, then converts the key to code points by
+ * calling {@link CharSequence#codePoints()} and passes them to the terminal as literal strings.
+ *
+ * Examples:
+ * {@code
+ * "ENTER" will trigger the ENTER keycode
+ * "LEFT" will trigger the LEFT keycode and be displayed as "←"
+ * "→" will input a "→" character
+ * "−" will input a "−" character
+ * "-_-" will input the string "-_-"
+ * }
+ *
+ * For more info, check https://wiki.termux.com/wiki/Touch_Keyboard.
+ */
+public class ExtraKeysInfo {
+
+    /**
+     * Matrix of buttons to be displayed in {@link ExtraKeysView}.
+     */
+    private final ExtraKeyButton[][] mButtons;
+
+    /**
+     * Initialize {@link ExtraKeysInfo}.
+     *
+     * @param propertiesInfo The {@link String} containing the info to create the {@link ExtraKeysInfo}.
+     *                       Check the class javadoc for details.
+     * @param style The style to pass to {@link #getCharDisplayMapForStyle(String)} to get the
+     *              {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the display text
+     *              mapping for the keys if a custom value is not defined by
+     *              {@link ExtraKeyButton#KEY_DISPLAY_NAME} for a key.
+     * @param extraKeyAliasMap The {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the
+     *                           aliases for the actual key names. You can create your own or
+     *                           optionally pass {@link ExtraKeysConstants#CONTROL_CHARS_ALIASES}.
+     */
+    public ExtraKeysInfo(@NonNull String propertiesInfo, String style,
+                         @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyAliasMap) throws JSONException {
+        mButtons = initExtraKeysInfo(propertiesInfo, getCharDisplayMapForStyle(style), extraKeyAliasMap);
+    }
+
+    /**
+     * Initialize {@link ExtraKeysInfo}.
+     *
+     * @param propertiesInfo The {@link String} containing the info to create the {@link ExtraKeysInfo}.
+     *                       Check the class javadoc for details.
+     * @param extraKeyDisplayMap The {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the
+     *                           display text mapping for the keys if a custom value is not defined
+     *                           by {@link ExtraKeyButton#KEY_DISPLAY_NAME} for a key. You can create
+     *                           your own or optionally pass one of the values defined in
+     *                           {@link #getCharDisplayMapForStyle(String)}.
+     * @param extraKeyAliasMap The {@link ExtraKeysConstants.ExtraKeyDisplayMap} that defines the
+     *                           aliases for the actual key names. You can create your own or
+     *                           optionally pass {@link ExtraKeysConstants#CONTROL_CHARS_ALIASES}.
+     */
+    public ExtraKeysInfo(@NonNull String propertiesInfo,
+                         @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyDisplayMap,
+                         @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyAliasMap) throws JSONException {
+        mButtons = initExtraKeysInfo(propertiesInfo, extraKeyDisplayMap, extraKeyAliasMap);
+    }
+
+    private ExtraKeyButton[][] initExtraKeysInfo(@NonNull String propertiesInfo,
+                                                 @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyDisplayMap,
+                                                 @NonNull ExtraKeysConstants.ExtraKeyDisplayMap extraKeyAliasMap) throws JSONException {
+        // Convert String propertiesInfo to Array of Arrays
+        JSONArray arr = new JSONArray(propertiesInfo);
+        Object[][] matrix = new Object[arr.length()][];
+        for (int i = 0; i < arr.length(); i++) {
+            JSONArray line = arr.getJSONArray(i);
+            matrix[i] = new Object[line.length()];
+            for (int j = 0; j < line.length(); j++) {
+                matrix[i][j] = line.get(j);
+            }
+        }
+
+        // convert matrix to buttons
+        ExtraKeyButton[][] buttons = new ExtraKeyButton[matrix.length][];
+        for (int i = 0; i < matrix.length; i++) {
+            buttons[i] = new ExtraKeyButton[matrix[i].length];
+            for (int j = 0; j < matrix[i].length; j++) {
+                Object key = matrix[i][j];
+
+                JSONObject jobject = normalizeKeyConfig(key);
+
+                ExtraKeyButton button;
+
+                if (!jobject.has(ExtraKeyButton.KEY_POPUP)) {
+                    // no popup
+                    button = new ExtraKeyButton(jobject, extraKeyDisplayMap, extraKeyAliasMap);
+                } else {
+                    // a popup
+                    JSONObject popupJobject = normalizeKeyConfig(jobject.get(ExtraKeyButton.KEY_POPUP));
+                    ExtraKeyButton popup = new ExtraKeyButton(popupJobject, extraKeyDisplayMap, extraKeyAliasMap);
+                    button = new ExtraKeyButton(jobject, popup, extraKeyDisplayMap, extraKeyAliasMap);
+                }
+
+                buttons[i][j] = button;
+            }
+        }
+
+        return buttons;
+    }
+
+    /**
+     * Convert "value" -> {"key": "value"}. Required by
+     * {@link ExtraKeyButton#ExtraKeyButton(JSONObject, ExtraKeyButton, ExtraKeysConstants.ExtraKeyDisplayMap, ExtraKeysConstants.ExtraKeyDisplayMap)}.
+     */
+    private static JSONObject normalizeKeyConfig(Object key) throws JSONException {
+        JSONObject jobject;
+        if (key instanceof String) {
+            jobject = new JSONObject();
+            jobject.put(ExtraKeyButton.KEY_KEY_NAME, key);
+        } else if (key instanceof JSONObject) {
+            jobject = (JSONObject) key;
+        } else {
+            throw new JSONException("An key in the extra-key matrix must be a string or an object");
+        }
+        return jobject;
+    }
+
+    public ExtraKeyButton[][] getMatrix() {
+        return mButtons;
+    }
+
+    @NonNull
+    public static ExtraKeysConstants.ExtraKeyDisplayMap getCharDisplayMapForStyle(String style) {
+        switch (style) {
+            case "arrows-only":
+                return EXTRA_KEY_DISPLAY_MAPS.ARROWS_ONLY_CHAR_DISPLAY;
+            case "arrows-all":
+                return EXTRA_KEY_DISPLAY_MAPS.LOTS_OF_ARROWS_CHAR_DISPLAY;
+            case "all":
+                return EXTRA_KEY_DISPLAY_MAPS.FULL_ISO_CHAR_DISPLAY;
+            case "none":
+                return new ExtraKeysConstants.ExtraKeyDisplayMap();
+            default:
+                return EXTRA_KEY_DISPLAY_MAPS.DEFAULT_CHAR_DISPLAY;
+        }
+    }
+
+}
diff --git a/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysView.java b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysView.java
new file mode 100644
index 0000000000..2749787ff0
--- /dev/null
+++ b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/ExtraKeysView.java
@@ -0,0 +1,646 @@
+package com.termux.shared.terminal.io.extrakeys;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.provider.Settings;
+import android.util.AttributeSet;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.ScheduledExecutorService;
+
+import java.util.Map;
+import java.util.HashMap;
+import java.util.stream.Collectors;
+
+import android.view.HapticFeedbackConstants;
+import android.view.LayoutInflater;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewConfiguration;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.GridLayout;
+import android.widget.PopupWindow;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+/**
+ * A {@link View} showing extra keys (such as Escape, Ctrl, Alt) not normally available on an Android soft
+ * keyboards.
+ *
+ * To use it, add following to a layout file and import it in your activity layout file or inflate
+ * it with a {@link androidx.viewpager.widget.ViewPager}.:
+ * {@code
+ * <?xml version="1.0" encoding="utf-8"?>
+ * <com.termux.shared.terminal.io.extrakeys.ExtraKeysView xmlns:android="http://schemas.android.com/apk/res/android"
+ *     android:id="@+id/extra_keys"
+ *     style="?android:attr/buttonBarStyle"
+ *     android:layout_width="match_parent"
+ *     android:layout_height="match_parent"
+ *     android:layout_alignParentBottom="true"
+ *     android:orientation="horizontal" />
+ * }
+ *
+ * Then in your activity, get its reference by a call to {@link android.app.Activity#findViewById(int)}
+ * or {@link LayoutInflater#inflate(int, ViewGroup)} if using {@link androidx.viewpager.widget.ViewPager}.
+ * Then call {@link #setExtraKeysViewClient(IExtraKeysView)} and pass it the implementation of
+ * {@link IExtraKeysView} so that you can receive callbacks. You can also override other values set
+ * in {@link ExtraKeysView#ExtraKeysView(Context, AttributeSet)} by calling the respective functions.
+ * If you extend {@link ExtraKeysView}, you can also set them in the constructor, but do call super().
+ *
+ * After this you will have to make a call to {@link ExtraKeysView#reload(ExtraKeysInfo) and pass
+ * it the {@link ExtraKeysInfo} to load and display the extra keys. Read its class javadocs for more
+ * info on how to create it.
+ *
+ * Termux app defines the view in res/layout/view_terminal_toolbar_extra_keys and
+ * inflates it in TerminalToolbarViewPager.instantiateItem() and sets the {@link ExtraKeysView} client
+ * and calls {@link ExtraKeysView#reload(ExtraKeysInfo).
+ * The {@link ExtraKeysInfo} is created by TermuxAppSharedProperties.setExtraKeys().
+ * Then its got and the view height is adjusted in TermuxActivity.setTerminalToolbarHeight().
+ * The client used is TermuxTerminalExtraKeys, which extends
+ * {@link com.termux.shared.terminal.io.TerminalExtraKeys} to handle Termux app specific logic and
+ * leave the rest to the super class.
+ */
+public final class ExtraKeysView extends GridLayout {
+
+    /** The client for the {@link ExtraKeysView}. */
+    public interface IExtraKeysView {
+
+        /**
+         * This is called by {@link ExtraKeysView} when a button is clicked. This is also called
+         * for {@link #mRepetitiveKeys} and {@link ExtraKeyButton} that have a popup set.
+         * However, this is not called for {@link #mSpecialButtons}, whose state can instead be read
+         * via a call to {@link #readSpecialButton(SpecialButton, boolean)}.
+         *
+         * @param view The view that was clicked.
+         * @param buttonInfo The {@link ExtraKeyButton} for the button that was clicked.
+         *                   The button may be a {@link ExtraKeyButton#KEY_MACRO} set which can be
+         *                   checked with a call to {@link ExtraKeyButton#isMacro()}.
+         * @param button The {@link Button} that was clicked.
+         */
+        void onExtraKeyButtonClick(View view, ExtraKeyButton buttonInfo, Button button);
+
+        /**
+         * This is called by {@link ExtraKeysView} when a button is clicked so that the client
+         * can perform any hepatic feedback. This is only called in the {@link Button.OnClickListener}
+         * and not for every repeat. Its also called for {@link #mSpecialButtons}.
+         *
+         * @param view The view that was clicked.
+         * @param buttonInfo The {@link ExtraKeyButton} for the button that was clicked.
+         * @param button The {@link Button} that was clicked.
+         * @return Return {@code true} if the client handled the feedback, otherwise {@code false}
+         * so that {@link ExtraKeysView#performExtraKeyButtonHapticFeedback(View, ExtraKeyButton, Button)}
+         * can handle it depending on system settings.
+         */
+        boolean performExtraKeyButtonHapticFeedback(View view, ExtraKeyButton buttonInfo, Button button);
+
+    }
+
+
+    /** Defines the default value for {@link #mButtonTextColor}. */
+    public static final int DEFAULT_BUTTON_TEXT_COLOR = 0xFFFFFFFF;
+    /** Defines the default value for {@link #mButtonActiveTextColor}. */
+    public static final int DEFAULT_BUTTON_ACTIVE_TEXT_COLOR = 0xFF80DEEA;
+    /** Defines the default value for {@link #mButtonBackgroundColor}. */
+    public static final int DEFAULT_BUTTON_BACKGROUND_COLOR = 0x00000000;
+    /** Defines the default value for {@link #mButtonActiveBackgroundColor}. */
+    public static final int DEFAULT_BUTTON_ACTIVE_BACKGROUND_COLOR = 0xFF7F7F7F;
+
+
+    /** Defines the minimum allowed duration in milliseconds for {@link #mLongPressTimeout}. */
+    public static final int MIN_LONG_PRESS_DURATION = 200;
+    /** Defines the maximum allowed duration in milliseconds for {@link #mLongPressTimeout}. */
+    public static final int MAX_LONG_PRESS_DURATION = 3000;
+    /** Defines the fallback duration in milliseconds for {@link #mLongPressTimeout}. */
+    public static final int FALLBACK_LONG_PRESS_DURATION = 400;
+
+    /** Defines the minimum allowed duration in milliseconds for {@link #mLongPressRepeatDelay}. */
+    public static final int MIN_LONG_PRESS__REPEAT_DELAY = 5;
+    /** Defines the maximum allowed duration in milliseconds for {@link #mLongPressRepeatDelay}. */
+    public static final int MAX_LONG_PRESS__REPEAT_DELAY = 2000;
+    /** Defines the default duration in milliseconds for {@link #mLongPressRepeatDelay}. */
+    public static final int DEFAULT_LONG_PRESS_REPEAT_DELAY = 80;
+
+
+
+    /** The implementation of the {@link IExtraKeysView} that acts as a client for the {@link ExtraKeysView}. */
+    private IExtraKeysView mExtraKeysViewClient;
+
+    /** The map for the {@link SpecialButton} and their {@link SpecialButtonState}. Defaults to
+     * the one returned by {@link #getDefaultSpecialButtons(ExtraKeysView)}. */
+    private Map<SpecialButton, SpecialButtonState> mSpecialButtons;
+
+    /** The keys for the {@link SpecialButton} added to {@link #mSpecialButtons}. This is automatically
+     * set when the call to {@link #setSpecialButtons(Map)} is made. */
+    private Set<String> mSpecialButtonsKeys;
+
+
+    /**
+     * The list of keys for which auto repeat of key should be triggered if its extra keys button
+     * is long pressed. This is done by calling {@link IExtraKeysView#onExtraKeyButtonClick(View, ExtraKeyButton, Button)}
+     * every {@link #mLongPressRepeatDelay} seconds after {@link #mLongPressTimeout} has passed.
+     * The default keys are defined by {@link ExtraKeysConstants#PRIMARY_REPETITIVE_KEYS}.
+     */
+    private List<String> mRepetitiveKeys;
+
+
+    /** The text color for the extra keys button. Defaults to {@link #DEFAULT_BUTTON_TEXT_COLOR}. */
+    private int mButtonTextColor;
+    /** The text color for the extra keys button when its active.
+     * Defaults to {@link #DEFAULT_BUTTON_ACTIVE_TEXT_COLOR}. */
+    private int mButtonActiveTextColor;
+    /** The background color for the extra keys button. Defaults to {@link #DEFAULT_BUTTON_BACKGROUND_COLOR}. */
+    private int mButtonBackgroundColor;
+    /** The background color for the extra keys button when its active. Defaults to
+     * {@link #DEFAULT_BUTTON_ACTIVE_BACKGROUND_COLOR}. */
+    private int mButtonActiveBackgroundColor;
+
+
+    /**
+     * Defines the duration in milliseconds before a press turns into a long press. The default
+     * duration used is the one returned by a call to {@link ViewConfiguration#getLongPressTimeout()}
+     * which will return the system defined duration which can be changed in accessibility settings.
+     * The duration must be in between {@link #MIN_LONG_PRESS_DURATION} and {@link #MAX_LONG_PRESS_DURATION},
+     * otherwise {@link #FALLBACK_LONG_PRESS_DURATION} is used.
+     */
+    private int mLongPressTimeout;
+
+    /**
+     * Defines the duration in milliseconds for the delay between trigger of each repeat of
+     * {@link #mRepetitiveKeys}. The default value is defined by {@link #DEFAULT_LONG_PRESS_REPEAT_DELAY}.
+     * The duration must be in between {@link #MIN_LONG_PRESS__REPEAT_DELAY} and
+     * {@link #MAX_LONG_PRESS__REPEAT_DELAY}, otherwise {@link #DEFAULT_LONG_PRESS_REPEAT_DELAY} is used.
+     */
+    private int mLongPressRepeatDelay;
+
+
+    /** The popup window shown if {@link ExtraKeyButton#getPopup()} returns a {@code non-null} value
+     * and a swipe up action is done on an extra key. */
+    private PopupWindow mPopupWindow;
+
+    private ScheduledExecutorService mScheduledExecutor;
+    private Handler mHandler;
+    private SpecialButtonsLongHoldRunnable mSpecialButtonsLongHoldRunnable;
+    private int mLongPressCount;
+
+
+    public ExtraKeysView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        setRepetitiveKeys(ExtraKeysConstants.PRIMARY_REPETITIVE_KEYS);
+        setSpecialButtons(getDefaultSpecialButtons(this));
+        setButtonColors(DEFAULT_BUTTON_TEXT_COLOR, DEFAULT_BUTTON_ACTIVE_TEXT_COLOR,
+                    DEFAULT_BUTTON_BACKGROUND_COLOR, DEFAULT_BUTTON_ACTIVE_BACKGROUND_COLOR);
+        setLongPressTimeout(ViewConfiguration.getLongPressTimeout());
+        setLongPressRepeatDelay(DEFAULT_LONG_PRESS_REPEAT_DELAY);
+    }
+
+
+    /** Get {@link #mExtraKeysViewClient}. */
+    public IExtraKeysView getExtraKeysViewClient() {
+        return mExtraKeysViewClient;
+    }
+
+    /** Set {@link #mExtraKeysViewClient}. */
+    public void setExtraKeysViewClient(IExtraKeysView extraKeysViewClient) {
+        mExtraKeysViewClient = extraKeysViewClient;
+    }
+
+
+    /** Get {@link #mRepetitiveKeys}. */
+    public List<String> getRepetitiveKeys() {
+        if (mRepetitiveKeys == null) return null;
+        return mRepetitiveKeys.stream().map(String::new).collect(Collectors.toList());
+    }
+
+    /** Set {@link #mRepetitiveKeys}. Must not be {@code null}. */
+    public void setRepetitiveKeys(@NonNull List<String> repetitiveKeys) {
+        mRepetitiveKeys = repetitiveKeys;
+    }
+
+
+    /** Get {@link #mSpecialButtons}. */
+    public Map<SpecialButton, SpecialButtonState> getSpecialButtons() {
+        if (mSpecialButtons == null) return null;
+        return mSpecialButtons.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+    }
+
+    /** Get {@link #mSpecialButtonsKeys}. */
+    public Set<String> getSpecialButtonsKeys() {
+        if (mSpecialButtonsKeys == null) return null;
+        return mSpecialButtonsKeys.stream().map(String::new).collect(Collectors.toSet());
+    }
+
+    /** Set {@link #mSpecialButtonsKeys}. Must not be {@code null}. */
+    public void setSpecialButtons(@NonNull Map<SpecialButton, SpecialButtonState> specialButtons) {
+        mSpecialButtons = specialButtons;
+        mSpecialButtonsKeys = this.mSpecialButtons.keySet().stream().map(SpecialButton::getKey).collect(Collectors.toSet());
+    }
+
+
+    /**
+     * Set the {@link ExtraKeysView} button colors.
+     *
+     * @param buttonTextColor The value for {@link #mButtonTextColor}.
+     * @param buttonActiveTextColor The value for {@link #mButtonActiveTextColor}.
+     * @param buttonBackgroundColor The value for {@link #mButtonBackgroundColor}.
+     * @param buttonActiveBackgroundColor The value for {@link #mButtonActiveBackgroundColor}.
+     */
+    public void setButtonColors(int buttonTextColor, int buttonActiveTextColor, int buttonBackgroundColor, int buttonActiveBackgroundColor) {
+        mButtonTextColor = buttonTextColor;
+        mButtonActiveTextColor = buttonActiveTextColor;
+        mButtonBackgroundColor = buttonBackgroundColor;
+        mButtonActiveBackgroundColor = buttonActiveBackgroundColor;
+    }
+
+
+    /** Get {@link #mButtonTextColor}. */
+    public int getButtonTextColor() {
+        return mButtonTextColor;
+    }
+
+    /** Set {@link #mButtonTextColor}. */
+    public void setButtonTextColor(int buttonTextColor) {
+        mButtonTextColor = buttonTextColor;
+    }
+
+
+    /** Get {@link #mButtonActiveTextColor}. */
+    public int getButtonActiveTextColor() {
+        return mButtonActiveTextColor;
+    }
+
+    /** Set {@link #mButtonActiveTextColor}. */
+    public void setButtonActiveTextColor(int buttonActiveTextColor) {
+        mButtonActiveTextColor = buttonActiveTextColor;
+    }
+
+
+    /** Get {@link #mButtonBackgroundColor}. */
+    public int getButtonBackgroundColor() {
+        return mButtonBackgroundColor;
+    }
+
+    /** Set {@link #mButtonBackgroundColor}. */
+    public void setButtonBackgroundColor(int buttonBackgroundColor) {
+        mButtonBackgroundColor = buttonBackgroundColor;
+    }
+
+
+    /** Get {@link #mButtonActiveBackgroundColor}. */
+    public int getButtonActiveBackgroundColor() {
+        return mButtonActiveBackgroundColor;
+    }
+
+    /** Set {@link #mButtonActiveBackgroundColor}. */
+    public void setButtonActiveBackgroundColor(int buttonActiveBackgroundColor) {
+        mButtonActiveBackgroundColor = buttonActiveBackgroundColor;
+    }
+
+
+    /** Get {@link #mLongPressTimeout}. */
+    public int getLongPressTimeout() {
+        return mLongPressTimeout;
+    }
+
+    /** Set {@link #mLongPressTimeout}. */
+    public void setLongPressTimeout(int longPressDuration) {
+        if (longPressDuration >= MIN_LONG_PRESS_DURATION && longPressDuration <= MAX_LONG_PRESS_DURATION) {
+            mLongPressTimeout = longPressDuration;
+        } else {
+                mLongPressTimeout = FALLBACK_LONG_PRESS_DURATION;
+        }
+    }
+
+    /** Get {@link #mLongPressRepeatDelay}. */
+    public int getLongPressRepeatDelay() {
+        return mLongPressRepeatDelay;
+    }
+
+    /** Set {@link #mLongPressRepeatDelay}. */
+    public void setLongPressRepeatDelay(int longPressRepeatDelay) {
+        if (mLongPressRepeatDelay >= MIN_LONG_PRESS__REPEAT_DELAY && mLongPressRepeatDelay <= MAX_LONG_PRESS__REPEAT_DELAY) {
+            mLongPressRepeatDelay = longPressRepeatDelay;
+        } else {
+            mLongPressRepeatDelay = DEFAULT_LONG_PRESS_REPEAT_DELAY;
+        }
+    }
+
+
+    /** Get the default map that can be used for {@link #mSpecialButtons}. */
+    @NonNull
+    public Map<SpecialButton, SpecialButtonState> getDefaultSpecialButtons(ExtraKeysView extraKeysView) {
+        return new HashMap<SpecialButton, SpecialButtonState>() {{
+            put(SpecialButton.CTRL, new SpecialButtonState(extraKeysView));
+            put(SpecialButton.ALT, new SpecialButtonState(extraKeysView));
+            put(SpecialButton.SHIFT, new SpecialButtonState(extraKeysView));
+            put(SpecialButton.FN, new SpecialButtonState(extraKeysView));
+        }};
+    }
+
+
+
+    /**
+     * Reload this instance of {@link ExtraKeysView} with the info passed in {@code extraKeysInfo}.
+     *
+     * @param extraKeysInfo The {@link ExtraKeysInfo} that defines the necessary info for the extra keys.
+     */
+    @SuppressLint("ClickableViewAccessibility")
+    public void reload(ExtraKeysInfo extraKeysInfo) {
+        if (extraKeysInfo == null)
+            return;
+
+        for(SpecialButtonState state : mSpecialButtons.values())
+            state.buttons = new ArrayList<>();
+
+        removeAllViews();
+
+        ExtraKeyButton[][] buttons = extraKeysInfo.getMatrix();
+
+        setRowCount(buttons.length);
+        setColumnCount(maximumLength(buttons));
+
+        for (int row = 0; row < buttons.length; row++) {
+            for (int col = 0; col < buttons[row].length; col++) {
+                final ExtraKeyButton buttonInfo = buttons[row][col];
+
+                Button button;
+                if (isSpecialButton(buttonInfo)) {
+                    button = createSpecialButton(buttonInfo.getKey(), true);
+                    if (button == null) return;
+                } else {
+                    button = new Button(getContext(), null, android.R.attr.buttonBarButtonStyle);
+                }
+
+                button.setText(buttonInfo.getDisplay());
+                button.setTextColor(mButtonTextColor);
+                button.setPadding(0, 0, 0, 0);
+
+                button.setOnClickListener(view -> {
+                    performExtraKeyButtonHapticFeedback(view, buttonInfo, button);
+                    onAnyExtraKeyButtonClick(view, buttonInfo, button);
+                });
+
+                button.setOnTouchListener((view, event) -> {
+                    switch (event.getAction()) {
+                        case MotionEvent.ACTION_DOWN:
+                            view.setBackgroundColor(mButtonActiveBackgroundColor);
+                            // Start long press scheduled executors which will be stopped in next MotionEvent
+                            startScheduledExecutors(view, buttonInfo, button);
+                            return true;
+
+                        case MotionEvent.ACTION_MOVE:
+                            if (buttonInfo.getPopup() != null) {
+                                // Show popup on swipe up
+                                if (mPopupWindow == null && event.getY() < 0) {
+                                    stopScheduledExecutors();
+                                    view.setBackgroundColor(mButtonBackgroundColor);
+                                    showPopup(view, buttonInfo.getPopup());
+                                }
+                                if (mPopupWindow != null && event.getY() > 0) {
+                                    view.setBackgroundColor(mButtonActiveBackgroundColor);
+                                    dismissPopup();
+                                }
+                            }
+                            return true;
+
+                        case MotionEvent.ACTION_CANCEL:
+                            view.setBackgroundColor(mButtonBackgroundColor);
+                            stopScheduledExecutors();
+                            return true;
+
+                        case MotionEvent.ACTION_UP:
+                            view.setBackgroundColor(mButtonBackgroundColor);
+                            stopScheduledExecutors();
+                            // If ACTION_UP up was not from a repetitive key or was with a key with a popup button
+                            if (mLongPressCount == 0 || mPopupWindow != null) {
+                                // Trigger popup button click if swipe up complete
+                                if (mPopupWindow != null) {
+                                    dismissPopup();
+                                    if (buttonInfo.getPopup() != null) {
+                                        onAnyExtraKeyButtonClick(view, buttonInfo.getPopup(), button);
+                                    }
+                                } else {
+                                    view.performClick();
+                                }
+                            }
+                            return true;
+
+                        default:
+                            return true;
+                    }
+                });
+
+                LayoutParams param = new GridLayout.LayoutParams();
+                param.width = 0;
+                param.height = 0;
+                param.setMargins(0, 0, 0, 0);
+                param.columnSpec = GridLayout.spec(col, GridLayout.FILL, 1.f);
+                param.rowSpec = GridLayout.spec(row, GridLayout.FILL, 1.f);
+                button.setLayoutParams(param);
+
+                addView(button);
+            }
+        }
+    }
+
+
+
+    private void onExtraKeyButtonClick(View view, ExtraKeyButton buttonInfo, Button button) {
+        if (mExtraKeysViewClient != null)
+            mExtraKeysViewClient.onExtraKeyButtonClick(view, buttonInfo, button);
+    }
+
+    private void performExtraKeyButtonHapticFeedback(View view, ExtraKeyButton buttonInfo, Button button) {
+        if (mExtraKeysViewClient != null) {
+            // If client handled the feedback, then just return
+            if (mExtraKeysViewClient.performExtraKeyButtonHapticFeedback(view, buttonInfo, button))
+                return;
+        }
+
+        if (Settings.System.getInt(getContext().getContentResolver(),
+            Settings.System.HAPTIC_FEEDBACK_ENABLED, 0) != 0) {
+
+            if (Build.VERSION.SDK_INT >= 28) {
+                button.performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP);
+            } else {
+                // Perform haptic feedback only if no total silence mode enabled.
+                if (Settings.Global.getInt(getContext().getContentResolver(), "zen_mode", 0) != 2) {
+                    button.performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP);
+                }
+            }
+        }
+    }
+
+
+
+    private void onAnyExtraKeyButtonClick(View view, @NonNull ExtraKeyButton buttonInfo, Button button) {
+        if (isSpecialButton(buttonInfo)) {
+            if (mLongPressCount > 0) return;
+            SpecialButtonState state = mSpecialButtons.get(SpecialButton.valueOf(buttonInfo.getKey()));
+            if (state == null) return;
+
+            // Toggle active state and disable lock state if new state is not active
+            state.setIsActive(!state.isActive);
+            if (!state.isActive)
+                state.setIsLocked(false);
+        } else {
+            onExtraKeyButtonClick(view, buttonInfo, button);
+        }
+    }
+
+
+    private void startScheduledExecutors(View view, ExtraKeyButton buttonInfo, Button button) {
+        stopScheduledExecutors();
+        mLongPressCount = 0;
+        if (mRepetitiveKeys.contains(buttonInfo.getKey())) {
+            // Auto repeat key if long pressed until ACTION_UP stops it by calling stopScheduledExecutors.
+            // Currently, only one (last) repeat key can run at a time. Old ones are stopped.
+            mScheduledExecutor = Executors.newSingleThreadScheduledExecutor();
+            mScheduledExecutor.scheduleWithFixedDelay(() -> {
+                mLongPressCount++;
+                onExtraKeyButtonClick(view, buttonInfo, button);
+            }, mLongPressTimeout, mLongPressRepeatDelay, TimeUnit.MILLISECONDS);
+        } else if (isSpecialButton(buttonInfo)) {
+            // Lock the key if long pressed by running mSpecialButtonsLongHoldRunnable after
+            // waiting for mLongPressTimeout milliseconds. If user does not long press, then the
+            // ACTION_UP triggered will cancel the runnable by calling stopScheduledExecutors before
+            // it has a chance to run.
+            SpecialButtonState state = mSpecialButtons.get(SpecialButton.valueOf(buttonInfo.getKey()));
+            if (state == null) return;
+            if (mHandler == null)
+                mHandler = new Handler(Looper.getMainLooper());
+            mSpecialButtonsLongHoldRunnable = new SpecialButtonsLongHoldRunnable(state);
+            mHandler.postDelayed(mSpecialButtonsLongHoldRunnable, mLongPressTimeout);
+        }
+    }
+
+    private void stopScheduledExecutors() {
+        if (mScheduledExecutor != null) {
+            mScheduledExecutor.shutdownNow();
+            mScheduledExecutor = null;
+        }
+
+        if (mSpecialButtonsLongHoldRunnable != null && mHandler != null) {
+            mHandler.removeCallbacks(mSpecialButtonsLongHoldRunnable);
+            mSpecialButtonsLongHoldRunnable = null;
+        }
+    }
+
+    private class SpecialButtonsLongHoldRunnable implements Runnable {
+        private final SpecialButtonState mState;
+
+        public SpecialButtonsLongHoldRunnable(SpecialButtonState state) {
+            mState = state;
+        }
+
+        public void run() {
+            // Toggle active and lock state
+            mState.setIsLocked(!mState.isActive);
+            mState.setIsActive(!mState.isActive);
+            mLongPressCount++;
+        }
+    }
+
+
+
+    void showPopup(View view, ExtraKeyButton extraButton) {
+        int width = view.getMeasuredWidth();
+        int height = view.getMeasuredHeight();
+        Button button;
+        if (isSpecialButton(extraButton)) {
+            button = createSpecialButton(extraButton.getKey(), false);
+            if (button == null) return;
+        } else {
+            button = new Button(getContext(), null, android.R.attr.buttonBarButtonStyle);
+            button.setTextColor(mButtonTextColor);
+        }
+        button.setText(extraButton.getDisplay());
+        button.setPadding(0, 0, 0, 0);
+        button.setMinHeight(0);
+        button.setMinWidth(0);
+        button.setMinimumWidth(0);
+        button.setMinimumHeight(0);
+        button.setWidth(width);
+        button.setHeight(height);
+        button.setBackgroundColor(mButtonActiveBackgroundColor);
+        mPopupWindow = new PopupWindow(this);
+        mPopupWindow.setWidth(LayoutParams.WRAP_CONTENT);
+        mPopupWindow.setHeight(LayoutParams.WRAP_CONTENT);
+        mPopupWindow.setContentView(button);
+        mPopupWindow.setOutsideTouchable(true);
+        mPopupWindow.setFocusable(false);
+        mPopupWindow.showAsDropDown(view, 0, -2 * height);
+    }
+
+    private void dismissPopup() {
+        mPopupWindow.setContentView(null);
+        mPopupWindow.dismiss();
+        mPopupWindow = null;
+    }
+
+
+
+    /** Check whether a {@link ExtraKeyButton} is a {@link SpecialButton}. */
+    public boolean isSpecialButton(ExtraKeyButton button) {
+        return mSpecialButtonsKeys.contains(button.getKey());
+    }
+
+    /**
+     * Read whether {@link SpecialButton} registered in {@link #mSpecialButtons} is active or not.
+     *
+     * @param specialButton The {@link SpecialButton} to read.
+     * @param autoSetInActive Set to {@code true} if {@link SpecialButtonState#isActive} should be
+     *                        set {@code false} if button is not locked.
+     * @return Returns {@code null} if button does not exist in {@link #mSpecialButtons}. If button
+     *         exists, then returns {@code true} if the button is created in {@link ExtraKeysView}
+     *         and is active, otherwise {@code false}.
+     */
+    @Nullable
+    public Boolean readSpecialButton(SpecialButton specialButton, boolean autoSetInActive) {
+        SpecialButtonState state = mSpecialButtons.get(specialButton);
+        if (state == null) return null;
+
+        if (!state.isCreated || !state.isActive)
+            return false;
+
+        // Disable active state only if not locked
+        if (autoSetInActive && !state.isLocked)
+            state.setIsActive(false);
+
+        return true;
+    }
+
+    private Button createSpecialButton(String buttonKey, boolean needUpdate) {
+        SpecialButtonState state = mSpecialButtons.get(SpecialButton.valueOf(buttonKey));
+        if (state == null) return null;
+        state.setIsCreated(true);
+        Button button = new Button(getContext(), null, android.R.attr.buttonBarButtonStyle);
+        button.setTextColor(state.isActive ? mButtonActiveTextColor : mButtonTextColor);
+        if (needUpdate) {
+            state.buttons.add(button);
+        }
+        return button;
+    }
+
+
+
+    /**
+     * General util function to compute the longest column length in a matrix.
+     */
+    static int maximumLength(Object[][] matrix) {
+        int m = 0;
+        for (Object[] row : matrix)
+            m = Math.max(m, row.length);
+        return m;
+    }
+
+}
diff --git a/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/SpecialButton.java b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/SpecialButton.java
new file mode 100644
index 0000000000..34dc258b99
--- /dev/null
+++ b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/SpecialButton.java
@@ -0,0 +1,52 @@
+package com.termux.shared.terminal.io.extrakeys;
+
+import androidx.annotation.NonNull;
+
+import java.util.HashMap;
+
+/** The {@link Class} that implements special buttons for {@link ExtraKeysView}. */
+public class SpecialButton {
+
+    private static final HashMap<String, SpecialButton> map = new HashMap<>();
+
+    public static final SpecialButton CTRL = new SpecialButton("CTRL");
+    public static final SpecialButton ALT = new SpecialButton("ALT");
+    public static final SpecialButton SHIFT = new SpecialButton("SHIFT");
+    public static final SpecialButton FN = new SpecialButton("FN");
+
+    /** The special button key. */
+    private final String key;
+
+    /**
+     * Initialize a {@link SpecialButton}.
+     *
+     * @param key The unique key name for the special button. The key is registered in {@link #map}
+     *            with which the {@link SpecialButton} can be retrieved via a call to
+     *            {@link #valueOf(String)}.
+     */
+    public SpecialButton(@NonNull final String key) {
+        this.key = key;
+        map.put(key, this);
+    }
+
+    /** Get {@link #key} for this {@link SpecialButton}. */
+    public String getKey() {
+        return key;
+    }
+
+    /**
+     * Get the {@link SpecialButton} for {@code key}.
+     *
+     * @param key The unique key name for the special button.
+     */
+    public static SpecialButton valueOf(String key) {
+        return map.get(key);
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        return key;
+    }
+
+}
diff --git a/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/SpecialButtonState.java b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/SpecialButtonState.java
new file mode 100644
index 0000000000..0af0359a9e
--- /dev/null
+++ b/termux-shared/src/main/java/com/termux/shared/terminal/io/extrakeys/SpecialButtonState.java
@@ -0,0 +1,49 @@
+package com.termux.shared.terminal.io.extrakeys;
+
+import android.widget.Button;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** The {@link Class} that maintains a state of a {@link SpecialButton} */
+public class SpecialButtonState {
+
+    /** If special button has been created for the {@link ExtraKeysView}. */
+    boolean isCreated = false;
+    /** If special button is active. */
+    boolean isActive = false;
+    /** If special button is locked due to long hold on it and should not be deactivated if its
+     * state is read. */
+    boolean isLocked = false;
+
+    List<Button> buttons = new ArrayList<>();
+
+    ExtraKeysView mExtraKeysView;
+
+    /**
+     * Initialize a {@link SpecialButtonState} to maintain state of a {@link SpecialButton}.
+     *
+     * @param extraKeysView The {@link ExtraKeysView} instance in which the {@link SpecialButton}
+     *                      is to be registered.
+     */
+    public SpecialButtonState(ExtraKeysView extraKeysView) {
+        mExtraKeysView = extraKeysView;
+    }
+
+    /** Set {@link #isCreated}. */
+    public void setIsCreated(boolean value) {
+        isCreated = value;
+    }
+
+    /** Set {@link #isActive}. */
+    public void setIsActive(boolean value) {
+        isActive = value;
+        buttons.forEach(button -> button.setTextColor(value ? mExtraKeysView.getButtonActiveTextColor() : mExtraKeysView.getButtonTextColor()));
+    }
+
+    /** Set {@link #isLocked}. */
+    public void setIsLocked(boolean value) {
+        isLocked = value;
+    }
+
+}