feat(assistant-screen): PROCESS_TEXT support

Signed-off-by: alperozturk96 <alper_ozturk@proton.me>

Author: alperozturk96

app/src/main/AndroidManifest.xml

@@ -135,7 +135,14 @@
 
         <activity
             android:name="com.nextcloud.ui.composeActivity.ComposeActivity"
-            android:exported="false" />
+            android:exported="true"
+            android:label="@string/compose_activity_label">
+            <intent-filter>
+                <action android:name="android.intent.action.PROCESS_TEXT" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="text/plain" />
+            </intent-filter>
+        </activity>
 
         <uses-library
             android:name="org.apache.http.legacy"

app/src/main/java/com/nextcloud/client/assistant/AssistantScreen.kt

@@ -61,19 +61,22 @@ import com.nextcloud.client.assistant.conversation.ConversationViewModel
 import com.nextcloud.client.assistant.conversation.repository.MockConversationRemoteRepository
 import com.nextcloud.client.assistant.extensions.getInputTitle
 import com.nextcloud.client.assistant.model.AssistantScreenState
+import com.nextcloud.client.assistant.model.AssistantPage
 import com.nextcloud.client.assistant.model.ScreenOverlayState
 import com.nextcloud.client.assistant.repository.local.MockAssistantLocalRepository
 import com.nextcloud.client.assistant.repository.remote.MockAssistantRemoteRepository
 import com.nextcloud.client.assistant.task.TaskView
 import com.nextcloud.client.assistant.taskTypes.TaskTypesRow
 import com.nextcloud.ui.composeActivity.ComposeActivity
+import com.nextcloud.ui.composeActivity.ComposeViewModel
 import com.nextcloud.ui.composeComponents.alertDialog.SimpleAlertDialog
 import com.nextcloud.ui.composeComponents.bottomSheet.MoreActionsBottomSheet
 import com.nextcloud.utils.extensions.getChat
 import com.owncloud.android.R
 import com.owncloud.android.lib.resources.assistant.v2.model.Task
 import com.owncloud.android.lib.resources.assistant.v2.model.TaskTypeData
 import com.owncloud.android.lib.resources.status.OCCapability
+import com.owncloud.android.utils.ClipboardUtil
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 
@@ -84,11 +87,13 @@ private const val PULL_TO_REFRESH_DELAY = 1500L
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun AssistantScreen(
+    composeViewModel: ComposeViewModel,
     viewModel: AssistantViewModel,
     conversationViewModel: ConversationViewModel,
     capability: OCCapability,
     activity: Activity
 ) {
+    val selectedText by composeViewModel.selectedText.collectAsState()
     val sessionId by viewModel.sessionId.collectAsState()
     val messageId by viewModel.snackbarMessageId.collectAsState()
     val screenOverlayState by viewModel.screenOverlayState.collectAsState()
@@ -99,7 +104,8 @@ fun AssistantScreen(
     val scope = rememberCoroutineScope()
     val pullRefreshState = rememberPullToRefreshState()
     val snackbarHostState = remember { SnackbarHostState() }
-    val pagerState = rememberPagerState(initialPage = 1, pageCount = { 2 })
+    val pagerState =
+        rememberPagerState(initialPage = AssistantPage.Content.id, pageCount = { AssistantPage.entries.size })
 
     LaunchedEffect(messageId) {
         messageId?.let {
@@ -108,6 +114,20 @@ fun AssistantScreen(
         }
     }
 
+    LaunchedEffect(selectedText) {
+        if (selectedText.isNullOrEmpty()) {
+            return@LaunchedEffect
+        }
+
+        if (pagerState.currentPage == AssistantPage.Conversation.id) {
+            pagerState.scrollToPage(AssistantPage.Content.id)
+        }
+
+        ClipboardUtil.copyToClipboard(activity, selectedText, false)
+
+        snackbarHostState.showSnackbar(activity.getString(R.string.assistant_screen_text_selected))
+    }
+
     LaunchedEffect(sessionId) {
         viewModel.startPolling(sessionId)
 
@@ -127,22 +147,22 @@ fun AssistantScreen(
         userScrollEnabled = taskTypes.getChat() != null
     ) { page ->
         when (page) {
-            0 -> {
+            AssistantPage.Conversation.id -> {
                 ConversationScreen(viewModel = conversationViewModel, close = {
                     scope.launch {
-                        pagerState.scrollToPage(1)
+                        pagerState.scrollToPage(AssistantPage.Content.id)
                     }
                 }, openChat = { newSessionId ->
                     viewModel.initSessionId(newSessionId)
                     taskTypes.getChat()?.let { chatTaskType ->
                         viewModel.selectTaskType(chatTaskType)
                     }
                     scope.launch {
-                        pagerState.scrollToPage(1)
+                        pagerState.scrollToPage(AssistantPage.Content.id)
                     }
                 })
             }
-            1 -> {
+            AssistantPage.Content.id -> {
                 Scaffold(
                     modifier = Modifier.pullToRefresh(
                         false,
@@ -166,7 +186,7 @@ fun AssistantScreen(
                                 viewModel.selectTaskType(task)
                             }, navigateToConversationList = {
                                 scope.launch {
-                                    pagerState.scrollToPage(0)
+                                    pagerState.scrollToPage(AssistantPage.Conversation.id)
                                 }
                             })
                         }
@@ -413,6 +433,7 @@ private fun AssistantScreenPreview() {
     MaterialTheme(
         content = {
             AssistantScreen(
+                composeViewModel = ComposeViewModel(),
                 conversationViewModel = getMockConversationViewModel(),
                 viewModel = getMockAssistantViewModel(false),
                 activity = ComposeActivity(),
@@ -431,6 +452,7 @@ private fun AssistantEmptyScreenPreview() {
     MaterialTheme(
         content = {
             AssistantScreen(
+                composeViewModel = ComposeViewModel(),
                 conversationViewModel = getMockConversationViewModel(),
                 viewModel = getMockAssistantViewModel(true),
                 activity = ComposeActivity(),

app/src/main/java/com/nextcloud/client/assistant/model/AssistantPage.kt

@@ -0,0 +1,13 @@
+/*
+ * Nextcloud - Android Client
+ *
+ * SPDX-FileCopyrightText: 2026 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package com.nextcloud.client.assistant.model
+
+enum class AssistantPage(val id: Int) {
+    Conversation(0),
+    Content(1)
+}

app/src/main/java/com/nextcloud/ui/composeActivity/ComposeActivity.kt

@@ -7,9 +7,11 @@
  */
 package com.nextcloud.ui.composeActivity
 
+import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
 import android.view.View
+import androidx.activity.viewModels
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
@@ -35,6 +37,7 @@ import com.owncloud.android.ui.activity.DrawerActivity
 class ComposeActivity : DrawerActivity() {
 
     lateinit var binding: ActivityComposeBinding
+    private val composeViewModel: ComposeViewModel by viewModels()
 
     companion object {
         const val DESTINATION = "DESTINATION"
@@ -46,9 +49,8 @@ class ComposeActivity : DrawerActivity() {
         setContentView(binding.root)
 
         val destination =
-            intent.getParcelableArgument(DESTINATION, ComposeDestination::class.java) ?: throw IllegalArgumentException(
-                "destination is not exists"
-            )
+            intent.getParcelableArgument(DESTINATION, ComposeDestination::class.java)
+                ?: ComposeDestination.getAssistantScreen(this)
 
         setupActivityUIFor(destination)
 
@@ -60,6 +62,22 @@ class ComposeActivity : DrawerActivity() {
                 }
             )
         }
+
+        processText(intent)
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        processText(intent)
+    }
+
+    private fun processText(intent: Intent) {
+        val text = intent.getCharSequenceExtra(Intent.EXTRA_PROCESS_TEXT)
+        if (text.isNullOrEmpty()) {
+            return
+        }
+
+        composeViewModel.updateSelectedText(text.toString())
     }
 
     private fun setupActivityUIFor(destination: ComposeDestination) {
@@ -105,6 +123,7 @@ class ComposeActivity : DrawerActivity() {
                 val client = nextcloudClient ?: return
 
                 AssistantScreen(
+                    composeViewModel = composeViewModel,
                     viewModel = AssistantViewModel(
                         accountName = userAccountManager.user.accountName,
                         remoteRepository = AssistantRemoteRepositoryImpl(client, capabilities),

app/src/main/java/com/nextcloud/ui/composeActivity/ComposeViewModel.kt

@@ -0,0 +1,24 @@
+/*
+ * Nextcloud - Android Client
+ *
+ * SPDX-FileCopyrightText: 2026 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package com.nextcloud.ui.composeActivity
+
+import androidx.lifecycle.ViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.update
+
+class ComposeViewModel : ViewModel() {
+    private val _selectedText = MutableStateFlow<String?>(null)
+    val selectedText: StateFlow<String?> = _selectedText
+
+    fun updateSelectedText(value: String) {
+        _selectedText.update {
+            value
+        }
+    }
+}

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

@@ -80,6 +80,8 @@
     <string name="conversation_screen_delete_error_title">Failed to delete conversation</string>
     <string name="conversation_screen_delete_button_title">Delete conversation</string>
 
+    <string name="compose_activity_label">Nextcloud Assistant</string>
+    <string name="assistant_screen_text_selected">Text copied from another app</string>
 
     <!-- Assistant General -->
     <string name="assistant_output_generation_warning_text">Output shown here is generated by AI. Make sure to always double-check.</string>