Added|Fixed: Do not show AutoFill UI on Termux start and add support for usernames

- The AutoFill type and hints are no longer hardcoded in `TerminalView` class and `TermuxActivity` layout xml. They are dynamically set to required values before making a manual AutoFill request and reverted back afterwards to default values. The hardcoded value `AUTOFILL_TYPE_TEXT` returned by `getAutofillType()` was causing the AutoFill UI to show on Activity starts, this will return `AUTOFILL_TYPE_NONE` by default now so that AutoFill UI isn't shown automatically.
- The AutoFill importance is no longer hardcoded in `TermuxActivity` layout xml and is returned by `TerminalView` class itself by `getImportantForAutofill()`.
- The AutoFill function in `TermuxActivity` for making a manual AutoFill request is moved to `TerminalView` class. This and moving of hardcoded values to `TerminalView` class mentioned above is done as complete logic of AutoFill should be handled by `TerminalView` class itself and not scattered in various places.
- The Terminal context menu now supports AutoFilling a username. Note that GBoard/Google Password Manager seems to have a bug where it will still show `Pick a saved password` instead of username, even though `AUTOFILL_HINT_USERNAME` is being requested, however it will still AutoFill a username of selected entry correctly.
- Pressing the back button to close the keyboard will also cancel the current manually requested AutoFill request and UI will not show when keyboard is opened again.

Closes #3909

app/src/main/java/com/termux/app/TermuxActivity.java

@@ -10,7 +10,6 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.ServiceConnection;
 import android.net.Uri;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.view.ContextMenu;
@@ -21,7 +20,6 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowManager;
-import android.view.autofill.AutofillManager;
 import android.widget.EditText;
 import android.widget.ImageButton;
 import android.widget.ListView;
@@ -181,7 +179,8 @@ public final class TermuxActivity extends AppCompatActivity implements ServiceCo
     private static final int CONTEXT_MENU_SELECT_URL_ID = 0;
     private static final int CONTEXT_MENU_SHARE_TRANSCRIPT_ID = 1;
     private static final int CONTEXT_MENU_SHARE_SELECTED_TEXT = 10;
-    private static final int CONTEXT_MENU_AUTOFILL_ID = 2;
+    private static final int CONTEXT_MENU_AUTOFILL_USERNAME = 11;
+    private static final int CONTEXT_MENU_AUTOFILL_PASSWORD = 2;
     private static final int CONTEXT_MENU_RESET_TERMINAL_ID = 3;
     private static final int CONTEXT_MENU_KILL_PROCESS_ID = 4;
     private static final int CONTEXT_MENU_STYLING_ID = 5;
@@ -632,20 +631,16 @@ public final class TermuxActivity extends AppCompatActivity implements ServiceCo
         TerminalSession currentSession = getCurrentSession();
         if (currentSession == null) return;
 
-        boolean addAutoFillMenu = false;
+        boolean autoFillEnabled = mTerminalView.isAutoFillEnabled();
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            AutofillManager autofillManager = getSystemService(AutofillManager.class);
-            if (autofillManager != null && autofillManager.isEnabled()) {
-                addAutoFillMenu = true;
-            }
-        }
 
         menu.add(Menu.NONE, CONTEXT_MENU_SELECT_URL_ID, Menu.NONE, R.string.action_select_url);
         menu.add(Menu.NONE, CONTEXT_MENU_SHARE_TRANSCRIPT_ID, Menu.NONE, R.string.action_share_transcript);
         if (!DataUtils.isNullOrEmpty(mTerminalView.getStoredSelectedText()))
             menu.add(Menu.NONE, CONTEXT_MENU_SHARE_SELECTED_TEXT, Menu.NONE, R.string.action_share_selected_text);
-        if (addAutoFillMenu)
+        if (autoFillEnabled)
-            menu.add(Menu.NONE, CONTEXT_MENU_AUTOFILL_ID, Menu.NONE, R.string.action_autofill_password);
+            menu.add(Menu.NONE, CONTEXT_MENU_AUTOFILL_USERNAME, Menu.NONE, R.string.action_autofill_username);
+        if (autoFillEnabled)
+            menu.add(Menu.NONE, CONTEXT_MENU_AUTOFILL_PASSWORD, Menu.NONE, R.string.action_autofill_password);
         menu.add(Menu.NONE, CONTEXT_MENU_RESET_TERMINAL_ID, Menu.NONE, R.string.action_reset_terminal);
         menu.add(Menu.NONE, CONTEXT_MENU_KILL_PROCESS_ID, Menu.NONE, getResources().getString(R.string.action_kill_process, getCurrentSession().getPid())).setEnabled(currentSession.isRunning());
         menu.add(Menu.NONE, CONTEXT_MENU_STYLING_ID, Menu.NONE, R.string.action_style_terminal);
@@ -676,8 +671,11 @@ public final class TermuxActivity extends AppCompatActivity implements ServiceCo
             case CONTEXT_MENU_SHARE_SELECTED_TEXT:
                 mTermuxTerminalViewClient.shareSelectedText();
                 return true;
-            case CONTEXT_MENU_AUTOFILL_ID:
+            case CONTEXT_MENU_AUTOFILL_USERNAME:
-                requestAutoFill();
+                mTerminalView.requestAutoFillUsername();
+                return true;
+            case CONTEXT_MENU_AUTOFILL_PASSWORD:
+                mTerminalView.requestAutoFillPassword();
                 return true;
             case CONTEXT_MENU_RESET_TERMINAL_ID:
                 onResetTerminalSession(session);
@@ -760,15 +758,6 @@ public final class TermuxActivity extends AppCompatActivity implements ServiceCo
         }
     }
 
-    private void requestAutoFill() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            AutofillManager autofillManager = getSystemService(AutofillManager.class);
-            if (autofillManager != null && autofillManager.isEnabled()) {
-                autofillManager.requestAutofill(mTerminalView);
-            }
-        }
-    }
-
 
 
     /**

app/src/main/res/layout/activity_termux.xml

@@ -31,8 +31,6 @@
                 android:focusableInTouchMode="true"
                 android:scrollbarThumbVertical="@drawable/terminal_scroll_shape"
                 android:scrollbars="vertical"
-                android:importantForAutofill="no"
-                android:autofillHints="password"
                 tools:ignore="UnusedAttribute" />
 
             <LinearLayout

app/src/main/res/values/strings.xml

@@ -73,6 +73,7 @@
     <string name="title_share_selected_text">Terminal Text</string>
     <string name="title_share_selected_text_with">Send selected text to:</string>
 
+    <string name="action_autofill_username">Autofill username</string>
     <string name="action_autofill_password">Autofill password</string>
 
     <string name="action_reset_terminal">Reset</string>

terminal-view/src/main/java/com/termux/view/TerminalView.java

@@ -27,6 +27,7 @@ import android.view.View;
 import android.view.ViewConfiguration;
 import android.view.ViewTreeObserver;
 import android.view.accessibility.AccessibilityManager;
+import android.view.autofill.AutofillManager;
 import android.view.autofill.AutofillValue;
 import android.view.inputmethod.BaseInputConnection;
 import android.view.inputmethod.EditorInfo;
@@ -85,6 +86,29 @@ public final class TerminalView extends View {
     /** If non-zero, this is the last unicode code point received if that was a combining character. */
     int mCombiningAccent;
 
+    /**
+     * The current AutoFill type returned for {@link View#getAutofillType()} by {@link #getAutofillType()}.
+     *
+     * The default is {@link #AUTOFILL_TYPE_NONE} so that AutoFill UI, like toolbar above keyboard
+     * is not shown automatically, like on Activity starts/View create. This value should be updated
+     * to required value, like {@link #AUTOFILL_TYPE_TEXT} before calling
+     * {@link AutofillManager#requestAutofill(View)} so that AutoFill UI shows. The updated value
+     * set will automatically be restored to {@link #AUTOFILL_TYPE_NONE} in
+     * {@link #autofill(AutofillValue)} so that AutoFill UI isn't shown anymore by calling
+     * {@link #resetAutoFill()}.
+     */
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    private int mAutoFillType = AUTOFILL_TYPE_NONE;
+
+    /**
+     * The current AutoFill hints returned for {@link View#getAutofillHints()} ()} by {@link #getAutofillHints()} ()}.
+     *
+     * The default is an empty `string[]`. This value should be updated to required value. The
+     * updated value set will automatically be restored an empty `string[]` in
+     * {@link #autofill(AutofillValue)} by calling {@link #resetAutoFill()}.
+     */
+    private String[] mAutoFillHints = new String[0];
+
     private final boolean mAccessibilityEnabled;
 
     /** The {@link KeyEvent} is generated from a virtual keyboard, like manually with the {@link KeyEvent#KeyEvent(int, int)} constructor. */
@@ -609,6 +633,7 @@ public final class TerminalView extends View {
         if (TERMINAL_VIEW_KEY_LOGGING_ENABLED)
             mClient.logInfo(LOG_TAG, "onKeyPreIme(keyCode=" + keyCode + ", event=" + event + ")");
         if (keyCode == KeyEvent.KEYCODE_BACK) {
+            cancelRequestAutoFill();
             if (isSelectingText()) {
                 stopTextSelectionMode();
                 return true;
@@ -1028,12 +1053,20 @@ public final class TerminalView extends View {
         if (value.isText()) {
             mTermSession.write(value.getTextValue().toString());
         }
+
+        resetAutoFill();
     }
 
     @RequiresApi(api = Build.VERSION_CODES.O)
     @Override
     public int getAutofillType() {
-        return AUTOFILL_TYPE_TEXT;
+        return mAutoFillType;
+    }
+
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    @Override
+    public String[] getAutofillHints() {
+        return mAutoFillHints;
     }
 
     @RequiresApi(api = Build.VERSION_CODES.O)
@@ -1042,6 +1075,91 @@ public final class TerminalView extends View {
         return AutofillValue.forText("");
     }
 
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    @Override
+    public int getImportantForAutofill() {
+        return IMPORTANT_FOR_AUTOFILL_NO;
+    }
+
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    private synchronized void resetAutoFill() {
+        // Restore none type so that AutoFill UI isn't shown anymore.
+        mAutoFillType = AUTOFILL_TYPE_NONE;
+        mAutoFillHints = new String[0];
+    }
+
+    public AutofillManager getAutoFillManagerService() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return null;
+
+        try {
+            Context context = getContext();
+            if (context == null) return null;
+            return context.getSystemService(AutofillManager.class);
+        } catch (Exception e) {
+            mClient.logStackTraceWithMessage(LOG_TAG, "Failed to get AutofillManager service", e);
+            return null;
+        }
+    }
+
+    public boolean isAutoFillEnabled() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return false;
+
+        try {
+            AutofillManager autofillManager = getAutoFillManagerService();
+            return autofillManager != null && autofillManager.isEnabled();
+        } catch (Exception e) {
+            mClient.logStackTraceWithMessage(LOG_TAG, "Failed to check if Autofill is enabled", e);
+            return false;
+        }
+    }
+
+    public synchronized void requestAutoFillUsername() {
+        requestAutoFill(
+            Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? new String[]{View.AUTOFILL_HINT_USERNAME} :
+                null);
+    }
+
+    public synchronized void requestAutoFillPassword() {
+        requestAutoFill(
+            Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? new String[]{View.AUTOFILL_HINT_PASSWORD} :
+            null);
+    }
+
+    public synchronized void requestAutoFill(String[] autoFillHints) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return;
+        if (autoFillHints == null || autoFillHints.length < 1) return;
+
+        try {
+            AutofillManager autofillManager = getAutoFillManagerService();
+            if (autofillManager != null && autofillManager.isEnabled()) {
+                // Update type that will be returned by `getAutofillType()` so that AutoFill UI is shown.
+                mAutoFillType = AUTOFILL_TYPE_TEXT;
+                // Update hints that will be returned by `getAutofillHints()` for which to show AutoFill UI.
+                mAutoFillHints = autoFillHints;
+                autofillManager.requestAutofill(this);
+            }
+        } catch (Exception e) {
+            mClient.logStackTraceWithMessage(LOG_TAG, "Failed to request Autofill", e);
+        }
+    }
+
+    public synchronized void cancelRequestAutoFill() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return;
+        if (mAutoFillType == AUTOFILL_TYPE_NONE) return;
+
+        try {
+            AutofillManager autofillManager = getAutoFillManagerService();
+            if (autofillManager != null && autofillManager.isEnabled()) {
+                resetAutoFill();
+                autofillManager.cancel();
+            }
+        } catch (Exception e) {
+            mClient.logStackTraceWithMessage(LOG_TAG, "Failed to cancel Autofill request", e);
+        }
+    }
+
+
+
 
 
     /**