Add edit button for media preview.

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

@@ -36,6 +36,7 @@ import org.thoughtcrime.securesms.conversation.mutiselect.forward.MultiselectFor
 import org.thoughtcrime.securesms.database.MediaDatabase
 import org.thoughtcrime.securesms.databinding.FragmentMediaPreviewV2Binding
 import org.thoughtcrime.securesms.mediasend.Media
+import org.thoughtcrime.securesms.mediasend.v2.MediaSelectionActivity
 import org.thoughtcrime.securesms.mms.GlideApp
 import org.thoughtcrime.securesms.mms.PartAuthority
 import org.thoughtcrime.securesms.permissions.Permissions
@@ -202,6 +203,7 @@ class MediaPreviewV2Fragment : Fragment(R.layout.fragment_media_preview_v2), Med
 
     binding.toolbar.setOnMenuItemClickListener {
       when (it.itemId) {
+        R.id.edit -> editMediaItem(currentItem)
         R.id.save -> saveToDisk(currentItem)
         R.id.delete -> deleteMedia(currentItem)
         android.R.id.home -> requireActivity().finish()
@@ -410,6 +412,20 @@ class MediaPreviewV2Fragment : Fragment(R.layout.fragment_media_preview_v2), Med
       .show()
   }
 
+  private fun editMediaItem(currentItem: MediaDatabase.MediaRecord) {
+    val media = currentItem.toMedia()
+    if (media == null) {
+      val rootView = view
+      if (rootView != null) {
+        Snackbar.make(rootView, R.string.MediaPreviewFragment_edit_media_error, Snackbar.LENGTH_INDEFINITE).show()
+      } else {
+        Toast.makeText(requireContext(), R.string.MediaPreviewFragment_edit_media_error, Toast.LENGTH_LONG).show()
+      }
+      return
+    }
+    startActivity(MediaSelectionActivity.editor(context = requireContext(), media = listOf(media)))
+  }
+
   override fun onPause() {
     super.onPause()
     getMediaPreviewFragmentFromChildFragmentManager(binding.mediaPager.currentItem)?.pause()

app/src/main/java/org/thoughtcrime/securesms/mediasend/v2/MediaSelectionActivity.kt

@@ -415,6 +415,17 @@ class MediaSelectionActivity :
       )
     }
 
+    @JvmStatic
+    fun editor(
+      context: Context,
+      media: List<Media>,
+    ): Intent {
+      return buildIntent(
+        context = context,
+        media = media
+      )
+    }
+
     @JvmStatic
     fun share(
       context: Context,