Enable inline autofill

build.gradle.kts

@@ -8,6 +8,7 @@ plugins {
 dependencies {
   implementation("androidx.window:window-java:1.3.0")
   implementation("androidx.core:core:1.16.0")
+  implementation("androidx.autofill:autofill:1.3.0")
   testImplementation("junit:junit:4.13.2")
 }
 

res/layout/keyboard.xml

@@ -1,2 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
-<juloo.keyboard2.Keyboard2View xmlns:android="http://schemas.android.com/apk/res/android" android:hardwareAccelerated="false" android:background="?attr/colorKeyboard"/>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:hardwareAccelerated="false" android:background="?attr/colorKeyboard">
+  <HorizontalScrollView
+    android:id="@+id/autofill_container"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:visibility="gone">
+    <LinearLayout
+      android:id="@+id/autofill_suggestions"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:padding="4dp"
+      android:orientation="horizontal" />
+  </HorizontalScrollView>
+  <juloo.keyboard2.Keyboard2View android:id="@+id/keyboard_view" android:layout_width="fill_parent" android:layout_height="wrap_content"/>
+</LinearLayout>

res/xml/method.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<input-method xmlns:android="http://schemas.android.com/apk/res/android" android:settingsActivity="juloo.keyboard2.SettingsActivity" android:supportsSwitchingToNextInputMethod="true">
+<input-method xmlns:android="http://schemas.android.com/apk/res/android" android:settingsActivity="juloo.keyboard2.SettingsActivity" android:supportsInlineSuggestions="true" android:supportsSwitchingToNextInputMethod="true">
   <!-- The first entry of the list makes latn_qwerty_us the default layout for
        unrecognized locales. -->
   <subtype android:label="%s" android:languageTag="en" android:imeSubtypeLocale="en" android:imeSubtypeMode="keyboard" android:isAsciiCapable="true" android:imeSubtypeExtraValue="script=latin,default_layout=latn_qwerty_us"/>

srcs/juloo.keyboard2/InlineAutofill.java

@@ -0,0 +1,89 @@
+package juloo.keyboard2;
+
+import static juloo.keyboard2.Logs.TAG;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.autofill.inline.UiVersions;
+import androidx.autofill.inline.v1.InlineSuggestionUi;
+
+import android.content.Context;
+import android.os.Build;
+import android.os.Bundle;
+import android.util.Log;
+import android.util.Size;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.inputmethod.InlineSuggestion;
+import android.view.inputmethod.InlineSuggestionsRequest;
+import android.view.inputmethod.InlineSuggestionsResponse;
+import android.widget.HorizontalScrollView;
+import android.widget.LinearLayout;
+import android.widget.inline.InlinePresentationSpec;
+
+import java.util.Collections;
+import java.util.List;
+
+@RequiresApi(api = Build.VERSION_CODES.R)
+public class InlineAutofill {
+  private HorizontalScrollView _autofillContainer;
+  private LinearLayout _autofillSuggestions;
+
+  public void onInflate(View keyboardViewParent)
+  {
+    _autofillContainer = keyboardViewParent.findViewById(R.id.autofill_container);
+    _autofillSuggestions = keyboardViewParent.findViewById(R.id.autofill_suggestions);
+  }
+
+  @Nullable
+  public InlineSuggestionsRequest onCreateInlineSuggestionsRequest(@NonNull Bundle uiExtras)
+  {
+    Size smallestSize = new Size(0, 0);
+    Size biggestSize = new Size(Integer.MAX_VALUE, Integer.MAX_VALUE);
+
+    UiVersions.StylesBuilder stylesBuilder = UiVersions.newStylesBuilder();
+
+    InlineSuggestionUi.Style style = InlineSuggestionUi.newStyleBuilder().build();
+    stylesBuilder.addStyle(style);
+
+    Bundle stylesBundle = stylesBuilder.build();
+    InlinePresentationSpec spec =
+            new InlinePresentationSpec.Builder(smallestSize, biggestSize)
+                    .setStyle(stylesBundle)
+                    .build();
+
+    return new InlineSuggestionsRequest.Builder(Collections.singletonList(spec)).build();
+  }
+
+  public boolean onInlineSuggestionsResponse(Context context, @NonNull InlineSuggestionsResponse response)
+  {
+    List<InlineSuggestion> inlineSuggestions = response.getInlineSuggestions();
+
+    float height =
+            TypedValue.applyDimension(
+                    TypedValue.COMPLEX_UNIT_DIP, 40, context.getResources().getDisplayMetrics());
+    Size autofillSize = new Size(ViewGroup.LayoutParams.WRAP_CONTENT, ((int) height));
+
+    _autofillSuggestions.removeAllViews();
+    _autofillContainer.setVisibility(inlineSuggestions.isEmpty() ? View.GONE : View.VISIBLE);
+
+    for (InlineSuggestion inlineSuggestion : inlineSuggestions)
+    {
+      try
+      {
+        inlineSuggestion.inflate(
+                context,
+                autofillSize,
+                context.getMainExecutor(),
+                _autofillSuggestions::addView);
+      }
+      catch (Exception e)
+      {
+        Log.e(TAG, "onInlineSuggestionsResponse - inlineSuggestion.infLate - " + e);
+      }
+    }
+    return true;
+  }
+}

srcs/juloo.keyboard2/Keyboard2.java

@@ -1,36 +1,39 @@
 package juloo.keyboard2;
 
 import android.annotation.TargetApi;
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.inputmethodservice.InputMethodService;
+import android.os.Build;
 import android.os.Build.VERSION;
+import android.os.Bundle;
 import android.os.Handler;
 import android.os.IBinder;
 import android.text.InputType;
-import android.util.Log;
-import android.util.LogPrinter;
 import android.view.*;
 import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InlineSuggestionsRequest;
+import android.view.inputmethod.InlineSuggestionsResponse;
 import android.view.inputmethod.InputConnection;
 import android.view.inputmethod.InputMethodInfo;
 import android.view.inputmethod.InputMethodManager;
 import android.view.inputmethod.InputMethodSubtype;
 import android.widget.FrameLayout;
 import android.widget.LinearLayout;
-import java.util.AbstractMap.SimpleEntry;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.HashSet;
 import java.util.List;
-import java.util.Set;
 import juloo.keyboard2.prefs.LayoutsPreference;
 
 public class Keyboard2 extends InputMethodService
   implements SharedPreferences.OnSharedPreferenceChangeListener
 {
+  private View _keyboardViewParent = null;
   private Keyboard2View _keyboardView;
+  private InlineAutofill _inlineAutofill;
   private KeyEventHandler _keyeventhandler;
   /** If not 'null', the layout to use instead of [_config.current_layout]. */
   private KeyboardData _currentSpecialLayout;
@@ -116,13 +119,21 @@ public void onCreate()
     Config.initGlobalConfig(prefs, getResources(), _keyeventhandler, _foldStateTracker.isUnfolded());
     prefs.registerOnSharedPreferenceChangeListener(this);
     _config = Config.globalConfig();
-    _keyboardView = (Keyboard2View)inflate_view(R.layout.keyboard);
+    _inlineAutofill = new InlineAutofill();
+    inflate_keyboardView();
     _keyboardView.reset();
     Logs.set_debug_logs(getResources().getBoolean(R.bool.debug_logs));
     ClipboardHistoryService.on_startup(this, _keyeventhandler);
     _foldStateTracker.setChangedCallback(() -> { refresh_config(); });
   }
 
+  private void inflate_keyboardView() {
+    _keyboardViewParent = inflate_view(R.layout.keyboard);
+    _inlineAutofill.onInflate(_keyboardViewParent);
+    _keyboardView = _keyboardViewParent.findViewById(R.id.keyboard_view);
+    _keyboardViewParent.getBackground().setAlpha(_config.keyboardOpacity);
+  }
+
   @Override
   public void onDestroy() {
     super.onDestroy();
@@ -211,10 +222,10 @@ private void refresh_config()
     // Refreshing the theme config requires re-creating the views
     if (prev_theme != _config.theme)
     {
-      _keyboardView = (Keyboard2View)inflate_view(R.layout.keyboard);
+      inflate_keyboardView();
       _emojiPane = null;
       _clipboard_pane = null;
-      setInputView(_keyboardView);
+      setInputView(_keyboardViewParent);
     }
     _keyboardView.reset();
   }
@@ -240,7 +251,7 @@ public void onStartInputView(EditorInfo info, boolean restarting)
     _currentSpecialLayout = refresh_special_layout();
     _keyboardView.setKeyboard(current_layout());
     _keyeventhandler.started(_config);
-    setInputView(_keyboardView);
+    setInputView(_keyboardViewParent);
     Logs.debug_startup_input_view(info, _config);
   }
 
@@ -393,7 +404,7 @@ public void handle_event_key(KeyValue.Event ev)
 
         case SWITCH_BACK_EMOJI:
         case SWITCH_BACK_CLIPBOARD:
-          setInputView(_keyboardView);
+          setInputView(_keyboardViewParent);
           break;
 
         case CHANGE_METHOD_PICKER:
@@ -477,4 +488,19 @@ private View inflate_view(int layout)
   {
     return View.inflate(new ContextThemeWrapper(this, _config.theme), layout, null);
   }
+
+  @RequiresApi(api = Build.VERSION_CODES.R)
+  @Nullable
+  @Override
+  public InlineSuggestionsRequest onCreateInlineSuggestionsRequest(@NonNull Bundle uiExtras)
+  {
+    return _inlineAutofill.onCreateInlineSuggestionsRequest(uiExtras);
+  }
+
+  @RequiresApi(api = Build.VERSION_CODES.R)
+  @Override
+  public boolean onInlineSuggestionsResponse(@NonNull InlineSuggestionsResponse response)
+  {
+    return _inlineAutofill.onInlineSuggestionsResponse(this, response);
+  }
 }

srcs/juloo.keyboard2/Keyboard2View.java

@@ -342,7 +342,6 @@ public WindowInsets onApplyWindowInsets(WindowInsets wi)
   protected void onDraw(Canvas canvas)
   {
     // Set keyboard background opacity
-    getBackground().setAlpha(_config.keyboardOpacity);
     float y = _tc.margin_top;
     for (KeyboardData.Row row : _keyboard.rows)
     {