Implement basic action mode menu

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActionModeCallback.kt

@@ -0,0 +1,27 @@
+package org.thoughtcrime.securesms.conversation.v2
+
+import android.view.ActionMode
+import android.view.Menu
+import android.view.MenuItem
+import network.loki.messenger.R
+
+class ConversationActionModeCallback : ActionMode.Callback {
+
+    override fun onCreateActionMode(mode: ActionMode, menu: Menu): Boolean {
+        val inflater = mode.menuInflater
+        inflater.inflate(R.menu.conversation_item_action_menu, menu)
+        return true
+    }
+
+    override fun onPrepareActionMode(mode: ActionMode?, menu: Menu): Boolean {
+        return false
+    }
+
+    override fun onActionItemClicked(mode: ActionMode, item: MenuItem): Boolean {
+        return true
+    }
+
+    override fun onDestroyActionMode(mode: ActionMode) {
+
+    }
+}

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt

@@ -3,6 +3,8 @@ package org.thoughtcrime.securesms.conversation.v2
 import android.database.Cursor
 import android.os.Bundle
 import android.util.Log
+import android.view.ActionMode
+import android.view.Menu
 import androidx.loader.app.LoaderManager
 import androidx.loader.content.Loader
 import androidx.recyclerview.widget.ItemTouchHelper
@@ -19,7 +21,7 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity() {
 
     private val adapter by lazy {
         val cursor = DatabaseFactory.getMmsSmsDatabase(this).getConversation(threadID)
-        val adapter = ConversationAdapter(this, cursor)
+        val adapter = ConversationAdapter(this, cursor) { handleLongPress(it) }
         adapter.setHasStableIds(true)
         adapter
     }
@@ -89,5 +91,14 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity() {
     private fun reply(messagePosition: Int) {
         Log.d("Loki", "Reply to message at position: $messagePosition.")
     }
+
+    private fun handleLongPress(messagePosition: Int) {
+        val actionModeCallback = ConversationActionModeCallback()
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
+            startActionMode(actionModeCallback, ActionMode.TYPE_PRIMARY)
+        } else {
+            startActionMode(actionModeCallback)
+        }
+    }
     // endregion
 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationAdapter.kt

@@ -11,7 +11,8 @@ import org.thoughtcrime.securesms.database.DatabaseFactory
 import org.thoughtcrime.securesms.database.model.MessageRecord
 import java.lang.IllegalStateException
 
-class ConversationAdapter(context: Context, cursor: Cursor) : CursorRecyclerViewAdapter<ViewHolder>(context, cursor) {
+class ConversationAdapter(context: Context, cursor: Cursor, private val onItemLongPress: (Int) -> Unit)
+    : CursorRecyclerViewAdapter<ViewHolder>(context, cursor) {
     private val messageDB = DatabaseFactory.getMmsSmsDatabase(context)
 
     sealed class ViewType(val rawValue: Int) {
@@ -55,7 +56,14 @@ class ConversationAdapter(context: Context, cursor: Cursor) : CursorRecyclerView
     override fun onBindItemViewHolder(viewHolder: ViewHolder, cursor: Cursor) {
         val message = getMessage(cursor)!!
         when (viewHolder) {
-            is VisibleMessageViewHolder -> viewHolder.view.bind(message)
+            is VisibleMessageViewHolder -> {
+                val view = viewHolder.view
+                view.bind(message)
+                view.setOnLongClickListener {
+                    onItemLongPress(viewHolder.adapterPosition)
+                    true
+                }
+            }
             is ControlMessageViewHolder -> viewHolder.view.bind(message)
         }
     }

app/src/main/res/menu/conversation_item_action_menu.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:icon="@drawable/ic_baseline_delete_24"
+        android:title="Title"
+        app:showAsAction="ifRoom" />
+
+    <item
+        android:icon="@drawable/ic_baseline_delete_24"
+        android:title="Title"
+        app:showAsAction="ifRoom" />
+
+    <item
+        android:icon="@drawable/ic_baseline_delete_24"
+        android:title="Title"
+        app:showAsAction="ifRoom" />
+
+</menu>