Add initial inline suggestions support

build.gradle

@@ -129,6 +129,7 @@ dependencies {
     implementation 'com.google.code.findbugs:jsr305:3.0.2'
 
     implementation 'androidx.datastore:datastore-preferences:1.0.0'
+    implementation 'androidx.autofill:autofill:1.1.0'
 
     debugImplementation 'androidx.compose.ui:ui-tooling'
     debugImplementation 'androidx.compose.ui:ui-test-manifest'

java/res/xml/method.xml

@@ -115,7 +115,8 @@
 <input-method xmlns:android="http://schemas.android.com/apk/res/android"
         android:settingsActivity="org.futo.inputmethod.latin.settings.SettingsActivity"
         android:isDefault="@bool/im_is_default"
-        android:supportsSwitchingToNextInputMethod="true">
+        android:supportsSwitchingToNextInputMethod="true"
+        android:supportsInlineSuggestions="true">
     <subtype android:icon="@drawable/ic_ime_switcher_dark"
             android:label="@string/subtype_en_US"
             android:subtypeId="0xc9194f98"

java/src/org/futo/inputmethod/latin/LatinIME.kt

@@ -2,11 +2,17 @@ package org.futo.inputmethod.latin
 
 import android.content.res.Configuration
 import android.inputmethodservice.InputMethodService
+import android.os.Build
+import android.os.Bundle
 import android.view.KeyEvent
 import android.view.View
 import android.view.inputmethod.CompletionInfo
 import android.view.inputmethod.EditorInfo
+import android.view.inputmethod.InlineSuggestion
+import android.view.inputmethod.InlineSuggestionsRequest
+import android.view.inputmethod.InlineSuggestionsResponse
 import android.view.inputmethod.InputMethodSubtype
+import androidx.annotation.RequiresApi
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -54,6 +60,7 @@ import org.futo.inputmethod.latin.uix.DynamicThemeProvider
 import org.futo.inputmethod.latin.uix.DynamicThemeProviderOwner
 import org.futo.inputmethod.latin.uix.KeyboardManagerForAction
 import org.futo.inputmethod.latin.uix.THEME_KEY
+import org.futo.inputmethod.latin.uix.createInlineSuggestionsRequest
 import org.futo.inputmethod.latin.uix.deferGetSetting
 import org.futo.inputmethod.latin.uix.deferSetSetting
 import org.futo.inputmethod.latin.uix.theme.DarkColorScheme
@@ -113,6 +120,8 @@ class LatinIME : InputMethodService(), LifecycleOwner, ViewModelStoreOwner, Save
         return currWindowAction != null
     }
 
+    private var inlineSuggestions: List<InlineSuggestion> = listOf()
+
     private fun recreateKeyboard() {
         legacyInputView = latinIMELegacy.onCreateInputView()
         latinIMELegacy.loadKeyboard()
@@ -224,13 +233,20 @@ class LatinIME : InputMethodService(), LifecycleOwner, ViewModelStoreOwner, Save
     @Composable
     private fun MainKeyboardViewWithActionBar() {
         Column {
-            if (shouldShowSuggestionStrip) {
+            // Don't show suggested words when it's not meant to be shown
+            val suggestedWordsOrNull = if(shouldShowSuggestionStrip) {
+                suggestedWords
+            } else {
+                null
+            }
+
             ActionBar(
-                    suggestedWords,
+                suggestedWordsOrNull,
                 latinIMELegacy,
+                inlineSuggestions = inlineSuggestions,
                 onActionActivated = { onActionActivated(it) }
             )
-            }
+            
             LegacyKeyboardView()
         }
     }
@@ -506,4 +522,17 @@ class LatinIME : InputMethodService(), LifecycleOwner, ViewModelStoreOwner, Save
 
         deferSetSetting(THEME_KEY, newTheme.key)
     }
+
+    @RequiresApi(Build.VERSION_CODES.R)
+    override fun onCreateInlineSuggestionsRequest(uiExtras: Bundle): InlineSuggestionsRequest {
+        return createInlineSuggestionsRequest(this, this.activeColorScheme)
+    }
+
+    @RequiresApi(Build.VERSION_CODES.R)
+    override fun onInlineSuggestionsResponse(response: InlineSuggestionsResponse): Boolean {
+        inlineSuggestions = response.inlineSuggestions
+        setContent()
+
+        return true
+    }
 }

java/src/org/futo/inputmethod/latin/uix/ActionBar.kt

@@ -1,12 +1,11 @@
 package org.futo.inputmethod.latin.uix
 
 import android.os.Build
+import android.view.inputmethod.InlineSuggestion
+import androidx.annotation.RequiresApi
 import androidx.compose.foundation.Canvas
 import androidx.compose.foundation.background
-import androidx.compose.foundation.gestures.Orientation
-import androidx.compose.foundation.gestures.scrollable
 import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.RowScope
 import androidx.compose.foundation.layout.Spacer
@@ -14,9 +13,9 @@ import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.material3.Button
+import androidx.compose.foundation.lazy.LazyRow
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.ColorScheme
 import androidx.compose.material3.Icon
@@ -24,12 +23,9 @@ import androidx.compose.material3.IconButton
 import androidx.compose.material3.IconButtonDefaults
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
-import androidx.compose.material3.darkColorScheme
 import androidx.compose.material3.dynamicDarkColorScheme
 import androidx.compose.material3.dynamicLightColorScheme
-import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -41,7 +37,6 @@ import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.geometry.CornerRadius
 import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.geometry.Size
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.RectangleShape
 import androidx.compose.ui.graphics.drawscope.scale
 import androidx.compose.ui.graphics.drawscope.translate
@@ -64,7 +59,6 @@ import org.futo.inputmethod.latin.R
 import org.futo.inputmethod.latin.SuggestedWords
 import org.futo.inputmethod.latin.SuggestedWords.SuggestedWordInfo
 import org.futo.inputmethod.latin.SuggestedWords.SuggestedWordInfo.KIND_TYPED
-import org.futo.inputmethod.latin.common.Constants
 import org.futo.inputmethod.latin.suggestions.SuggestionStripView
 import org.futo.inputmethod.latin.uix.theme.DarkColorScheme
 import org.futo.inputmethod.latin.uix.theme.UixThemeWrapper
@@ -359,6 +353,7 @@ fun ActionBar(
     words: SuggestedWords?,
     suggestionStripListener: SuggestionStripView.Listener,
     onActionActivated: (Action) -> Unit,
+    inlineSuggestions: List<InlineSuggestion>,
     forceOpenActionsInitially: Boolean = false,
 ) {
     val isActionsOpen = remember { mutableStateOf(forceOpenActionsInitially) }
@@ -372,6 +367,8 @@ fun ActionBar(
 
             if(isActionsOpen.value) {
                 ActionItems(onActionActivated)
+            } else if(inlineSuggestions.isNotEmpty() && Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+                InlineSuggestions(inlineSuggestions)
             } else if(words != null) {
                 SuggestionItems(words) {
                     suggestionStripListener.pickSuggestionManually(
@@ -440,8 +437,9 @@ fun PreviewActionBarWithSuggestions(colorScheme: ColorScheme = DarkColorScheme)
     UixThemeWrapper(colorScheme) {
         ActionBar(
             words = exampleSuggestedWords,
+            suggestionStripListener = ExampleListener(),
             onActionActivated = { },
-            suggestionStripListener = ExampleListener()
+            inlineSuggestions = listOf()
         )
     }
 }
@@ -452,8 +450,9 @@ fun PreviewActionBarWithEmptySuggestions(colorScheme: ColorScheme = DarkColorSch
     UixThemeWrapper(colorScheme) {
         ActionBar(
             words = exampleSuggestedWordsEmpty,
+            suggestionStripListener = ExampleListener(),
             onActionActivated = { },
-            suggestionStripListener = ExampleListener()
+            inlineSuggestions = listOf()
         )
     }
 }
@@ -464,8 +463,9 @@ fun PreviewExpandedActionBar(colorScheme: ColorScheme = DarkColorScheme) {
     UixThemeWrapper(colorScheme) {
         ActionBar(
             words = exampleSuggestedWordsEmpty,
-            onActionActivated = { },
             suggestionStripListener = ExampleListener(),
+            onActionActivated = { },
+            inlineSuggestions = listOf(),
             forceOpenActionsInitially = true
         )
     }

java/src/org/futo/inputmethod/latin/uix/InlineSuggestionView.kt

@@ -0,0 +1,154 @@
+package org.futo.inputmethod.latin.uix
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.os.Build
+import android.util.Size
+import android.util.TypedValue
+import android.view.ViewGroup
+import android.view.inputmethod.InlineSuggestion
+import android.view.inputmethod.InlineSuggestionsRequest
+import android.widget.inline.InlineContentView
+import android.widget.inline.InlinePresentationSpec
+import androidx.annotation.RequiresApi
+import androidx.autofill.inline.UiVersions
+import androidx.autofill.inline.common.ImageViewStyle
+import androidx.autofill.inline.common.TextViewStyle
+import androidx.autofill.inline.common.ViewStyle
+import androidx.autofill.inline.v1.InlineSuggestionUi
+import androidx.compose.foundation.layout.RowScope
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.material3.ColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.viewinterop.AndroidView
+import kotlin.math.roundToInt
+
+@SuppressLint("RestrictedApi")
+@RequiresApi(Build.VERSION_CODES.R)
+fun createInlineSuggestionsRequest(
+    context: Context,
+    activeColorScheme: ColorScheme
+): InlineSuggestionsRequest {
+    val fromDp = { v: Float ->
+        TypedValue.applyDimension(
+            TypedValue.COMPLEX_UNIT_DIP,
+            v,
+            context.resources.displayMetrics
+        ).roundToInt()
+    }
+
+    val stylesBuilder = UiVersions.newStylesBuilder()
+    val suggestionStyle = InlineSuggestionUi.newStyleBuilder()
+        .setSingleIconChipStyle(
+            ViewStyle.Builder()
+                .setBackgroundColor(activeColorScheme.secondaryContainer.toArgb())
+                .setPadding(0, 0, 0, 0)
+                .build()
+        )
+        .setChipStyle(
+            ViewStyle.Builder()
+                .setBackgroundColor(activeColorScheme.secondaryContainer.toArgb())
+                .setPadding(
+                    fromDp(8.0f),
+                    fromDp(0.0f),
+                    fromDp(8.0f),
+                    fromDp(0.0f),
+                )
+                .build()
+        )
+        .setStartIconStyle(ImageViewStyle.Builder().setLayoutMargin(0, 0, 0, 0).build())
+        .setTitleStyle(
+            TextViewStyle.Builder()
+                .setLayoutMargin(
+                    fromDp(4.0f),
+                    fromDp(0.0f),
+                    fromDp(4.0f),
+                    fromDp(0.0f),
+                )
+                .setTextColor(activeColorScheme.onSecondaryContainer.toArgb())
+                .setTextSize(14.0f)
+                .build()
+        )
+        .setSubtitleStyle(
+            TextViewStyle.Builder()
+                .setLayoutMargin(
+                    fromDp(4.0f),
+                    fromDp(0.0f),
+                    fromDp(4.0f),
+                    fromDp(0.0f),
+                )
+                .setTextColor(activeColorScheme.onSecondaryContainer.copy(alpha = 0.5f).toArgb())
+                .setTextSize(12.0f)
+                .build()
+        )
+        .setEndIconStyle(
+            ImageViewStyle.Builder()
+                .setLayoutMargin(0, 0, 0, 0)
+                .build()
+        )
+        .build()
+    stylesBuilder.addStyle(suggestionStyle)
+
+    val stylesBundle = stylesBuilder.build()
+
+    val spec = InlinePresentationSpec.Builder(
+        Size(0, 0),
+        Size(Int.MAX_VALUE, Int.MAX_VALUE)
+    ).setStyle(stylesBundle).build()
+
+    return InlineSuggestionsRequest.Builder(listOf(spec)).let { request ->
+        request.setMaxSuggestionCount(InlineSuggestionsRequest.SUGGESTION_COUNT_UNLIMITED)
+        request.build()
+    }
+}
+
+
+@RequiresApi(Build.VERSION_CODES.R)
+@Composable
+fun InlineSuggestionView(inlineSuggestion: InlineSuggestion) = with(LocalDensity.current) {
+    val context = LocalContext.current
+
+    val size = Size(ViewGroup.LayoutParams.WRAP_CONTENT, 32.dp.toPx().toInt())
+    var inlineContentView by remember { mutableStateOf<InlineContentView?>(null) }
+
+    LaunchedEffect(Unit) {
+        try {
+            inlineSuggestion.inflate(context, size, context.mainExecutor) { inflatedView ->
+                if (inflatedView != null) {
+                    inlineContentView = inflatedView
+                }
+            }
+        } catch (e: Exception) {
+            println(e.toString())
+        }
+    }
+
+    if (inlineContentView != null) {
+        AndroidView(
+            factory = { inlineContentView!! },
+            modifier = Modifier.padding(4.dp, 0.dp)
+        )
+    }
+}
+
+@RequiresApi(Build.VERSION_CODES.R)
+@Composable
+fun RowScope.InlineSuggestions(suggestions: List<InlineSuggestion>) {
+    LazyRow(modifier = Modifier.weight(1.0f).padding(0.dp, 4.dp)) {
+        items(suggestions.size) {
+            InlineSuggestionView(suggestions[it])
+        }
+    }
+}