Add toolbar to MediaPreviewV2 implementation.

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewRepository.kt

@@ -7,7 +7,6 @@ import io.reactivex.rxjava3.schedulers.Schedulers
 import org.signal.core.util.logging.Log
 import org.signal.core.util.requireLong
 import org.thoughtcrime.securesms.attachments.AttachmentId
-import org.thoughtcrime.securesms.attachments.DatabaseAttachment
 import org.thoughtcrime.securesms.database.AttachmentDatabase
 import org.thoughtcrime.securesms.database.MediaDatabase
 import org.thoughtcrime.securesms.database.MediaDatabase.Sorting
@@ -29,11 +28,11 @@ class MediaPreviewRepository {
    * @param sorting the ordering of the results
    * @param limit the maximum quantity of the results
    */
-  fun getAttachments(startingUri: Uri, threadId: Long, sorting: Sorting, limit: Int = 500): Flowable<List<DatabaseAttachment>> {
+  fun getAttachments(startingUri: Uri, threadId: Long, sorting: Sorting, limit: Int = 500): Flowable<List<MediaDatabase.MediaRecord>> {
     return Single.fromCallable {
       val cursor = media.getGalleryMediaForThread(threadId, sorting)
 
-      val acc = mutableListOf<DatabaseAttachment>()
+      val acc = mutableListOf<MediaDatabase.MediaRecord>()
       var attachmentUri: Uri? = null
       while (cursor.moveToNext()) {
         val attachmentId = AttachmentId(cursor.requireLong(AttachmentDatabase.ROW_ID), cursor.requireLong(AttachmentDatabase.UNIQUE_ID))
@@ -45,7 +44,7 @@ class MediaPreviewRepository {
 
       if (attachmentUri == startingUri) {
         for (i in 0..limit) {
-          val element = MediaDatabase.MediaRecord.from(cursor).attachment
+          val element = MediaDatabase.MediaRecord.from(cursor)
           if (element != null) {
             acc.add(element)
           }

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewV2Activity.kt

@@ -21,8 +21,5 @@ class MediaPreviewV2Activity : AppCompatActivity(R.layout.activity_mediapreview_
 
   companion object {
     private const val FRAGMENT_TAG = "media_preview_fragment_v2"
-    private const val NOT_IN_A_THREAD = -2
-
-    const val THREAD_ID_EXTRA = "thread_id"
   }
 }

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewV2Adapter.kt

@@ -6,8 +6,9 @@ import androidx.viewpager2.adapter.FragmentStateAdapter
 import org.thoughtcrime.securesms.attachments.Attachment
 import org.thoughtcrime.securesms.util.MediaUtil
 
-class PreviewMediaAdapter(val fragment: Fragment, val items: List<Attachment>) : FragmentStateAdapter(fragment) {
-  var autoPlayPosition = -1
+class MediaPreviewV2Adapter(val fragment: Fragment) : FragmentStateAdapter(fragment) {
+  private var items: List<Attachment> = listOf()
+  private var autoPlayPosition = -1
 
   override fun getItemCount(): Int {
     return items.count()
@@ -36,4 +37,11 @@ class PreviewMediaAdapter(val fragment: Fragment, val items: List<Attachment>) :
 
     return fragment
   }
+
+  fun updateBackingItems(newItems: Collection<Attachment>) {
+    if (newItems != items) {
+      items = newItems.toList()
+      notifyDataSetChanged()
+    }
+  }
 }

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewV2Fragment.kt

@@ -1,9 +1,11 @@
 package org.thoughtcrime.securesms.mediapreview
 
+import android.content.Context
 import android.os.Bundle
 import android.view.View
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
 import org.signal.core.util.logging.Log
 import org.thoughtcrime.securesms.R
@@ -11,7 +13,11 @@ import org.thoughtcrime.securesms.animation.DepthPageTransformer
 import org.thoughtcrime.securesms.components.ViewBinderDelegate
 import org.thoughtcrime.securesms.database.MediaDatabase
 import org.thoughtcrime.securesms.databinding.FragmentMediaPreviewV2Binding
+import org.thoughtcrime.securesms.recipients.Recipient
+import org.thoughtcrime.securesms.util.DateUtils
+import org.thoughtcrime.securesms.util.FullscreenHelper
 import org.thoughtcrime.securesms.util.LifecycleDisposable
+import java.util.Locale
 
 class MediaPreviewV2Fragment : Fragment(R.layout.fragment_media_preview_v2), MediaPreviewFragment.Events {
   private val TAG = Log.tag(MediaPreviewV2Fragment::class.java)
@@ -20,24 +26,92 @@ class MediaPreviewV2Fragment : Fragment(R.layout.fragment_media_preview_v2), Med
   private val binding by ViewBinderDelegate(FragmentMediaPreviewV2Binding::bind)
   private val viewModel: MediaPreviewV2ViewModel by viewModels()
 
+  private lateinit var fullscreenHelper: FullscreenHelper
+
+  override fun onAttach(context: Context) {
+    super.onAttach(context)
+    fullscreenHelper = FullscreenHelper(requireActivity())
+  }
+
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     super.onViewCreated(view, savedInstanceState)
+    initializeViewModel()
     binding.mediaPager.offscreenPageLimit = 1
     binding.mediaPager.setPageTransformer(DepthPageTransformer())
-    lifecycleDisposable += viewModel.state.distinctUntilChanged().observeOn(AndroidSchedulers.mainThread()).subscribe {
-      if (it.loadState == MediaPreviewV2State.LoadState.READY) {
-        binding.mediaPager.adapter = PreviewMediaAdapter(this, it.attachments)
+    val adapter = MediaPreviewV2Adapter(this)
+    binding.mediaPager.adapter = adapter
+    binding.mediaPager.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+      override fun onPageSelected(position: Int) {
+        super.onPageSelected(position)
+        viewModel.setCurrentPage(position)
       }
+    })
+    initializeFullScreenUi()
+    lifecycleDisposable += viewModel.state.distinctUntilChanged().observeOn(AndroidSchedulers.mainThread()).subscribe {
+      bindCurrentState(it)
     }
-    initializeViewModel()
+  }
+
+  private fun initializeFullScreenUi() {
+    fullscreenHelper.configureToolbarLayout(binding.toolbarCutoutSpacer, binding.toolbar)
+    fullscreenHelper.hideSystemUI()
   }
 
   private fun initializeViewModel() {
     val args = MediaIntentFactory.requireArguments(requireArguments())
+    viewModel.setShowThread(args.showThread)
     val sorting = MediaDatabase.Sorting.values()[args.sorting]
     viewModel.fetchAttachments(args.initialMediaUri, args.threadId, sorting)
   }
 
+  private fun bindCurrentState(currentState: MediaPreviewV2State) {
+    when (currentState.loadState) {
+      MediaPreviewV2State.LoadState.READY -> bindReadyState(currentState)
+      // INIT, else -> no-op
+    }
+  }
+
+  private fun bindReadyState(currentState: MediaPreviewV2State) {
+    (binding.mediaPager.adapter as MediaPreviewV2Adapter).updateBackingItems(currentState.mediaRecords.mapNotNull { it.attachment })
+    val currentItem: MediaDatabase.MediaRecord = currentState.mediaRecords[currentState.position]
+    binding.toolbar.title = getTitleText(currentItem, currentState.showThread)
+    binding.toolbar.subtitle = getSubTitleText(currentItem)
+  }
+
+  private fun getTitleText(mediaRecord: MediaDatabase.MediaRecord, showThread: Boolean): String {
+    val recipient: Recipient = Recipient.live(mediaRecord.recipientId).get()
+    val defaultFromString: String = if (mediaRecord.isOutgoing) {
+      getString(R.string.MediaPreviewActivity_you)
+    } else {
+      recipient.getDisplayName(requireContext())
+    }
+    if (!showThread) {
+      return defaultFromString
+    }
+
+    val threadRecipient = Recipient.live(mediaRecord.threadRecipientId).get()
+    return if (mediaRecord.isOutgoing) {
+      if (threadRecipient.isSelf) {
+        getString(R.string.note_to_self)
+      } else {
+        getString(R.string.MediaPreviewActivity_you_to_s, threadRecipient.getDisplayName(requireContext()))
+      }
+    } else {
+      if (threadRecipient.isGroup) {
+        getString(R.string.MediaPreviewActivity_s_to_s, defaultFromString, threadRecipient.getDisplayName(requireContext()))
+      } else {
+        getString(R.string.MediaPreviewActivity_s_to_you, defaultFromString)
+      }
+    }
+  }
+
+  private fun getSubTitleText(mediaRecord: MediaDatabase.MediaRecord): String =
+    if (mediaRecord.date > 0) {
+      DateUtils.getExtendedRelativeTimeSpanString(requireContext(), Locale.getDefault(), mediaRecord.date)
+    } else {
+      getString(R.string.MediaPreviewActivity_draft)
+    }
+
   override fun singleTapOnMedia(): Boolean {
     Log.d(TAG, "singleTapOnMedia()")
     return true

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewV2State.kt

@@ -1,10 +1,12 @@
 package org.thoughtcrime.securesms.mediapreview
 
-import org.thoughtcrime.securesms.attachments.Attachment
+import org.thoughtcrime.securesms.database.MediaDatabase
 
 data class MediaPreviewV2State(
-  val attachments: List<Attachment> = emptyList(),
-  val loadState: LoadState = LoadState.INIT
+  val mediaRecords: List<MediaDatabase.MediaRecord> = emptyList(),
+  val loadState: LoadState = LoadState.INIT,
+  val position: Int = 0,
+  val showThread: Boolean = false
 ) {
   enum class LoadState { INIT, READY, }
 }

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewV2ViewModel.kt

@@ -19,8 +19,23 @@ class MediaPreviewV2ViewModel : ViewModel() {
   val state: Flowable<MediaPreviewV2State> = store.stateFlowable.observeOn(AndroidSchedulers.mainThread())
 
   fun fetchAttachments(startingUri: Uri, threadId: Long, sorting: MediaDatabase.Sorting) {
-    disposables += store.update(repository.getAttachments(startingUri, threadId, sorting)) { attachments, oldState ->
-      oldState.copy(attachments = attachments, loadState = MediaPreviewV2State.LoadState.READY)
+    disposables += store.update(repository.getAttachments(startingUri, threadId, sorting)) { mediaRecords: List<MediaDatabase.MediaRecord>, oldState: MediaPreviewV2State ->
+      oldState.copy(
+        mediaRecords = mediaRecords,
+        loadState = MediaPreviewV2State.LoadState.READY
+      )
+    }
+  }
+
+  fun setShowThread(value: Boolean) {
+    store.update { oldState ->
+      oldState.copy(showThread = value)
+    }
+  }
+
+  fun setCurrentPage(position: Int) {
+    store.update { oldState ->
+      oldState.copy(position = position)
     }
   }
 

app/src/main/res/layout/fragment_media_preview_v2.xml

@@ -1,9 +1,32 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:background="@color/core_grey_95"
+    android:theme="@style/TextSecure.MediaPreview">
 
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/toolbar_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@color/media_preview_bar_background"
+        app:elevation="0dp">
+
+        <View
+            android:id="@+id/toolbar_cutout_spacer"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:visibility="gone" />
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:theme="?actionBarStyle"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="@android:color/transparent" />
+
+    </com.google.android.material.appbar.AppBarLayout>
     <androidx.viewpager2.widget.ViewPager2
         android:id="@+id/media_pager"
         android:layout_width="match_parent"