Merge pull request #1406 from RocketChat/project/emoji-as-a-module

[PROJECT] Move out whole emoji codebase to a separate module

app/build.gradle

@@ -10,7 +10,7 @@ android {
 
     defaultConfig {
         applicationId "chat.rocket.android"
-        minSdkVersion 21
+        minSdkVersion versions.minSdk
         targetSdkVersion versions.targetSdk
         versionCode 2030
         versionName "2.4.0"
@@ -61,6 +61,7 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
 
     implementation project(':player')
+    implementation project(':emoji')
 
     implementation libraries.kotlin
     implementation libraries.coroutines

app/src/main/java/chat/rocket/android/app/RocketChatApplication.kt

@@ -19,7 +19,7 @@ import chat.rocket.android.server.domain.GetCurrentServerInteractor
 import chat.rocket.android.server.domain.GetSettingsInteractor
 import chat.rocket.android.server.domain.SITE_URL
 import chat.rocket.android.server.domain.TokenRepository
-import chat.rocket.android.widget.emoji.EmojiRepository
+import chat.rocket.android.emoji.EmojiRepository
 import com.crashlytics.android.Crashlytics
 import com.crashlytics.android.core.CrashlyticsCore
 import com.facebook.drawee.backends.pipeline.DraweeConfig

app/src/main/java/chat/rocket/android/chatroom/adapter/AudioAttachmentViewHolder.kt

 package chat.rocket.android.chatroom.adapter
 
 import android.view.View
+import androidx.core.view.isVisible
 import chat.rocket.android.chatroom.uimodel.AudioAttachmentUiModel
 import chat.rocket.android.player.PlayerActivity
-import chat.rocket.android.util.extensions.setVisible
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import kotlinx.android.synthetic.main.message_attachment.view.*
 
 class AudioAttachmentViewHolder(itemView: View,
@@ -15,8 +15,8 @@ class AudioAttachmentViewHolder(itemView: View,
     init {
         with(itemView) {
             setupActionMenu(attachment_container)
-            image_attachment.setVisible(false)
-            audio_video_attachment.setVisible(true)
+            image_attachment.isVisible = false
+            audio_video_attachment.isVisible = true
         }
     }
 

app/src/main/java/chat/rocket/android/chatroom/adapter/AuthorAttachmentViewHolder.kt

@@ -6,8 +6,8 @@ import android.view.View
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import chat.rocket.android.chatroom.uimodel.AuthorAttachmentUiModel
+import chat.rocket.android.emoji.EmojiReactionListener
 import chat.rocket.android.util.extensions.content
-import chat.rocket.android.widget.emoji.EmojiReactionListener
 import chat.rocket.common.util.ifNull
 import kotlinx.android.synthetic.main.item_author_attachment.view.*
 

app/src/main/java/chat/rocket/android/chatroom/adapter/BaseViewHolder.kt

@@ -9,8 +9,8 @@ import chat.rocket.android.R
 import chat.rocket.android.chatroom.ui.bottomsheet.BottomSheetMenu
 import chat.rocket.android.chatroom.ui.bottomsheet.adapter.ActionListAdapter
 import chat.rocket.android.chatroom.uimodel.BaseUiModel
-import chat.rocket.android.widget.emoji.Emoji
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.Emoji
+import chat.rocket.android.emoji.EmojiReactionListener
 import chat.rocket.core.model.Message
 import chat.rocket.core.model.isSystemMessage
 import com.google.android.flexbox.FlexDirection

app/src/main/java/chat/rocket/android/chatroom/adapter/ChatRoomAdapter.kt

@@ -9,7 +9,7 @@ import chat.rocket.android.R
 import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
 import chat.rocket.android.chatroom.uimodel.*
 import chat.rocket.android.util.extensions.inflate
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import chat.rocket.core.model.Message
 import chat.rocket.core.model.isSystemMessage
 import timber.log.Timber

app/src/main/java/chat/rocket/android/chatroom/adapter/ColorAttachmentViewHolder.kt

@@ -6,7 +6,7 @@ import android.text.method.LinkMovementMethod
 import android.view.View
 import chat.rocket.android.R
 import chat.rocket.android.chatroom.uimodel.ColorAttachmentUiModel
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import kotlinx.android.synthetic.main.item_color_attachment.view.*
 
 

app/src/main/java/chat/rocket/android/chatroom/adapter/GenericFileAttachmentViewHolder.kt

@@ -4,8 +4,8 @@ import android.content.Intent
 import android.view.View
 import androidx.core.net.toUri
 import chat.rocket.android.chatroom.uimodel.GenericFileAttachmentUiModel
+import chat.rocket.android.emoji.EmojiReactionListener
 import chat.rocket.android.util.extensions.content
-import chat.rocket.android.widget.emoji.EmojiReactionListener
 import kotlinx.android.synthetic.main.item_file_attachment.view.*
 
 class GenericFileAttachmentViewHolder(itemView: View,

app/src/main/java/chat/rocket/android/chatroom/adapter/ImageAttachmentViewHolder.kt

@@ -3,7 +3,7 @@ package chat.rocket.android.chatroom.adapter
 import android.view.View
 import chat.rocket.android.chatroom.uimodel.ImageAttachmentUiModel
 import chat.rocket.android.helper.ImageHelper
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import com.facebook.drawee.backends.pipeline.Fresco
 import kotlinx.android.synthetic.main.message_attachment.view.*
 

app/src/main/java/chat/rocket/android/chatroom/adapter/MessageAttachmentViewHolder.kt

@@ -3,7 +3,7 @@ package chat.rocket.android.chatroom.adapter
 import android.text.method.LinkMovementMethod
 import android.view.View
 import chat.rocket.android.chatroom.uimodel.MessageAttachmentUiModel
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import kotlinx.android.synthetic.main.item_message_attachment.view.*
 
 class MessageAttachmentViewHolder(

app/src/main/java/chat/rocket/android/chatroom/adapter/MessageReactionsAdapter.kt

 package chat.rocket.android.chatroom.adapter
 
-import androidx.recyclerview.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageView
 import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
 import chat.rocket.android.R
 import chat.rocket.android.chatroom.uimodel.ReactionUiModel
 import chat.rocket.android.dagger.DaggerLocalComponent
+import chat.rocket.android.emoji.Emoji
+import chat.rocket.android.emoji.EmojiKeyboardListener
+import chat.rocket.android.emoji.EmojiPickerPopup
+import chat.rocket.android.emoji.EmojiReactionListener
 import chat.rocket.android.infrastructure.LocalRepository
-import chat.rocket.android.widget.emoji.Emoji
-import chat.rocket.android.widget.emoji.EmojiListenerAdapter
-import chat.rocket.android.widget.emoji.EmojiPickerPopup
-import chat.rocket.android.widget.emoji.EmojiReactionListener
 import java.util.concurrent.CopyOnWriteArrayList
 import javax.inject.Inject
 
@@ -72,21 +72,23 @@ class MessageReactionsAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>()
     }
 
     fun contains(reactionShortname: String) =
-            reactions.firstOrNull { it.shortname ==  reactionShortname} != null
+        reactions.firstOrNull { it.shortname == reactionShortname } != null
 
     class SingleReactionViewHolder(view: View,
                                    private val listener: EmojiReactionListener?)
         : RecyclerView.ViewHolder(view), View.OnClickListener {
-        @Inject lateinit var localRepository: LocalRepository
-        @Volatile lateinit var reaction: ReactionUiModel
+        @Inject
+        lateinit var localRepository: LocalRepository
+        @Volatile
+        lateinit var reaction: ReactionUiModel
         @Volatile
         var clickHandled = false
 
         init {
             DaggerLocalComponent.builder()
-                    .context(itemView.context)
-                    .build()
-                    .inject(this)
+                .context(itemView.context)
+                .build()
+                .inject(this)
         }
 
         fun bind(reaction: ReactionUiModel) {
@@ -125,7 +127,7 @@ class MessageReactionsAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>()
             itemView as ImageView
             itemView.setOnClickListener {
                 val emojiPickerPopup = EmojiPickerPopup(itemView.context)
-                emojiPickerPopup.listener = object : EmojiListenerAdapter() {
+                emojiPickerPopup.listener = object : EmojiKeyboardListener {
                     override fun onEmojiAdded(emoji: Emoji) {
                         listener?.onReactionAdded(messageId, emoji)
                     }

app/src/main/java/chat/rocket/android/chatroom/adapter/MessageReplyViewHolder.kt

@@ -2,7 +2,7 @@ package chat.rocket.android.chatroom.adapter
 
 import android.view.View
 import chat.rocket.android.chatroom.uimodel.MessageReplyUiModel
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import kotlinx.android.synthetic.main.item_message_reply.view.*
 
 class MessageReplyViewHolder(

app/src/main/java/chat/rocket/android/chatroom/adapter/MessageViewHolder.kt

@@ -5,7 +5,7 @@ import android.text.method.LinkMovementMethod
 import android.view.View
 import androidx.core.view.isVisible
 import chat.rocket.android.chatroom.uimodel.MessageUiModel
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import chat.rocket.core.model.isSystemMessage
 import kotlinx.android.synthetic.main.avatar.view.*
 import kotlinx.android.synthetic.main.item_message.view.*

app/src/main/java/chat/rocket/android/chatroom/adapter/UrlPreviewViewHolder.kt

@@ -2,11 +2,11 @@ package chat.rocket.android.chatroom.adapter
 
 import android.net.Uri
 import android.view.View
+import androidx.core.view.isVisible
 import chat.rocket.android.chatroom.uimodel.UrlPreviewUiModel
-import chat.rocket.android.util.extensions.content
 import chat.rocket.android.util.extensions.openTabbedUrl
-import chat.rocket.android.util.extensions.setVisible
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
+import chat.rocket.android.util.extensions.content
 import kotlinx.android.synthetic.main.message_url_preview.view.*
 
 class UrlPreviewViewHolder(itemView: View,
@@ -23,10 +23,10 @@ class UrlPreviewViewHolder(itemView: View,
     override fun bindViews(data: UrlPreviewUiModel) {
         with(itemView) {
             if (data.thumbUrl.isNullOrEmpty()) {
-                image_preview.setVisible(false)
+                image_preview.isVisible = false
             } else {
                 image_preview.setImageURI(data.thumbUrl)
-                image_preview.setVisible(true)
+                image_preview.isVisible = true
             }
             text_host.content = data.hostname
             text_title.content = data.title

app/src/main/java/chat/rocket/android/chatroom/adapter/VideoAttachmentViewHolder.kt

 package chat.rocket.android.chatroom.adapter
 
 import android.view.View
+import androidx.core.view.isVisible
 import chat.rocket.android.chatroom.uimodel.VideoAttachmentUiModel
 import chat.rocket.android.player.PlayerActivity
-import chat.rocket.android.util.extensions.setVisible
-import chat.rocket.android.widget.emoji.EmojiReactionListener
+import chat.rocket.android.emoji.EmojiReactionListener
 import kotlinx.android.synthetic.main.message_attachment.view.*
 
 class VideoAttachmentViewHolder(itemView: View,
@@ -15,8 +15,8 @@ class VideoAttachmentViewHolder(itemView: View,
     init {
         with(itemView) {
             setupActionMenu(attachment_container)
-            image_attachment.setVisible(false)
-            audio_video_attachment.setVisible(true)
+            image_attachment.isVisible = false
+            audio_video_attachment.isVisible = true
         }
     }
 

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomFragment.kt

@@ -8,17 +8,27 @@ import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
 import android.os.Handler
+import android.text.SpannableStringBuilder
+import android.view.KeyEvent
+import android.view.LayoutInflater
+import android.view.Menu
+import android.view.MenuInflater
+import android.view.MenuItem
+import android.view.View
+import android.view.ViewGroup
 import androidx.annotation.DrawableRes
+import androidx.core.text.bold
+import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import androidx.recyclerview.widget.DefaultItemAnimator
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import android.text.SpannableStringBuilder
-import android.view.*
-import androidx.core.text.bold
-import androidx.core.view.isVisible
 import chat.rocket.android.R
-import chat.rocket.android.chatroom.adapter.*
+import chat.rocket.android.chatroom.adapter.ChatRoomAdapter
+import chat.rocket.android.chatroom.adapter.CommandSuggestionsAdapter
+import chat.rocket.android.chatroom.adapter.PEOPLE
+import chat.rocket.android.chatroom.adapter.PeopleSuggestionsAdapter
+import chat.rocket.android.chatroom.adapter.RoomSuggestionsAdapter
 import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
 import chat.rocket.android.chatroom.presentation.ChatRoomView
 import chat.rocket.android.chatroom.uimodel.BaseUiModel
@@ -26,6 +36,13 @@ import chat.rocket.android.chatroom.uimodel.MessageUiModel
 import chat.rocket.android.chatroom.uimodel.suggestion.ChatRoomSuggestionUiModel
 import chat.rocket.android.chatroom.uimodel.suggestion.CommandSuggestionUiModel
 import chat.rocket.android.chatroom.uimodel.suggestion.PeopleSuggestionUiModel
+import chat.rocket.android.emoji.ComposerEditText
+import chat.rocket.android.emoji.Emoji
+import chat.rocket.android.emoji.EmojiKeyboardListener
+import chat.rocket.android.emoji.EmojiKeyboardPopup
+import chat.rocket.android.emoji.EmojiParser
+import chat.rocket.android.emoji.EmojiPickerPopup
+import chat.rocket.android.emoji.EmojiReactionListener
 import chat.rocket.android.helper.EndlessRecyclerViewScrollListener
 import chat.rocket.android.helper.KeyboardHelper
 import chat.rocket.android.helper.MessageParser
@@ -39,7 +56,6 @@ import chat.rocket.android.util.extensions.rotateBy
 import chat.rocket.android.util.extensions.showToast
 import chat.rocket.android.util.extensions.textContent
 import chat.rocket.android.util.extensions.ui
-import chat.rocket.android.widget.emoji.*
 import chat.rocket.common.model.RoomType
 import chat.rocket.common.model.roomTypeOf
 import chat.rocket.core.internal.realtime.socket.model.State
@@ -556,7 +572,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
     override fun showReactionsPopup(messageId: String) {
         ui {
             val emojiPickerPopup = EmojiPickerPopup(it)
-            emojiPickerPopup.listener = object : EmojiListenerAdapter() {
+            emojiPickerPopup.listener = object : EmojiKeyboardListener {
                 override fun onEmojiAdded(emoji: Emoji) {
                     onReactionAdded(messageId, emoji)
                 }
@@ -600,15 +616,15 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
                     handler.postDelayed(dismissStatus, 2000)
                 }
                 is State.Disconnected -> connection_status_text.text =
-                        getString(R.string.status_disconnected)
+                    getString(R.string.status_disconnected)
                 is State.Connecting -> connection_status_text.text =
-                        getString(R.string.status_connecting)
+                    getString(R.string.status_connecting)
                 is State.Authenticating -> connection_status_text.text =
-                        getString(R.string.status_authenticating)
+                    getString(R.string.status_authenticating)
                 is State.Disconnecting -> connection_status_text.text =
-                        getString(R.string.status_disconnecting)
+                    getString(R.string.status_disconnecting)
                 is State.Waiting -> connection_status_text.text =
-                        getString(R.string.status_waiting, state.seconds)
+                    getString(R.string.status_waiting, state.seconds)
             }
         }
     }
@@ -664,7 +680,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
 
             subscribeComposeTextMessage()
             emojiKeyboardPopup =
-                    EmojiKeyboardPopup(activity!!, activity!!.findViewById(R.id.fragment_container))
+                EmojiKeyboardPopup(activity!!, activity!!.findViewById(R.id.fragment_container))
             emojiKeyboardPopup.listener = this
             text_message.listener = object : ComposerEditText.ComposerEditTextListener {
                 override fun onKeyboardOpened() {

app/src/main/java/chat/rocket/android/chatroom/uimodel/UiModelMapper.kt

@@ -26,7 +26,7 @@ import chat.rocket.android.server.domain.baseUrl
 import chat.rocket.android.server.domain.useRealName
 import chat.rocket.android.util.extensions.avatarUrl
 import chat.rocket.android.util.extensions.isNotNullNorEmpty
-import chat.rocket.android.widget.emoji.EmojiParser
+import chat.rocket.android.emoji.EmojiParser
 import chat.rocket.core.model.ChatRoom
 import chat.rocket.core.model.Message
 import chat.rocket.core.model.MessageType

app/src/main/java/chat/rocket/android/chatrooms/ui/ChatRoomsFragment.kt

@@ -13,6 +13,7 @@ import android.widget.CheckBox
 import android.widget.RadioGroup
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.SearchView
+import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProviders
@@ -29,12 +30,11 @@ import chat.rocket.android.db.DatabaseManager
 import chat.rocket.android.helper.ChatRoomsSortOrder
 import chat.rocket.android.helper.Constants
 import chat.rocket.android.helper.SharedPreferenceHelper
-import chat.rocket.android.util.extensions.fadeIn
-import chat.rocket.android.util.extensions.fadeOut
 import chat.rocket.android.util.extensions.inflate
-import chat.rocket.android.util.extensions.setVisible
 import chat.rocket.android.util.extensions.showToast
 import chat.rocket.android.util.extensions.ui
+import chat.rocket.android.util.extensions.fadeIn
+import chat.rocket.android.util.extensions.fadeOut
 import chat.rocket.android.widget.DividerItemDecoration
 import chat.rocket.core.internal.realtime.socket.model.State
 import chat.rocket.core.model.ChatRoom
@@ -242,16 +242,16 @@ class ChatRoomsFragment : Fragment(), ChatRoomsView {
     override suspend fun updateChatRooms(newDataSet: List<ChatRoom>) {}
 
     override fun showNoChatRoomsToDisplay() {
-        ui { text_no_data_to_display.setVisible(true) }
+        ui { text_no_data_to_display.isVisible = true }
     }
 
     override fun showLoading() {
-        ui { view_loading.setVisible(true) }
+        ui { view_loading.isVisible = true }
     }
 
     override fun hideLoading() {
         ui {
-            view_loading.setVisible(false)
+            view_loading.isVisible = false
         }
     }
 

app/src/main/java/chat/rocket/android/createchannel/ui/CreateChannelFragment.kt

 package chat.rocket.android.createchannel.ui
 
 import android.os.Bundle
-import android.view.*
+import android.view.LayoutInflater
+import android.view.Menu
+import android.view.MenuItem
+import android.view.View
+import android.view.ViewGroup
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.view.ActionMode
 import androidx.core.view.isVisible
 import androidx.core.view.postDelayed
 import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
 import chat.rocket.android.R
 import chat.rocket.android.createchannel.presentation.CreateChannelPresenter
 import chat.rocket.android.createchannel.presentation.CreateChannelView
@@ -18,7 +24,6 @@ import chat.rocket.android.util.extensions.asObservable
 import chat.rocket.android.util.extensions.inflate
 import chat.rocket.android.util.extensions.showToast
 import chat.rocket.android.util.extensions.ui
-import chat.rocket.android.widget.DividerItemDecoration
 import chat.rocket.common.model.RoomType
 import chat.rocket.common.model.roomTypeOf
 import com.google.android.material.chip.Chip
@@ -181,7 +186,7 @@ class CreateChannelFragment : Fragment(), CreateChannelView, ActionMode.Callback
 
     private fun setupToolBar() {
         (activity as AppCompatActivity?)?.supportActionBar?.title =
-                getString(R.string.title_create_channel)
+            getString(R.string.title_create_channel)
     }
 
     private fun setupViewListeners() {
@@ -189,7 +194,7 @@ class CreateChannelFragment : Fragment(), CreateChannelView, ActionMode.Callback
             if (isChecked) {
                 text_channel_type.text = getString(R.string.msg_private_channel)
                 text_channel_type_description.text =
-                        getString(R.string.msg_private_channel_description)
+                    getString(R.string.msg_private_channel_description)
                 image_channel_icon.setImageDrawable(
                     context?.getDrawable(R.drawable.ic_lock_black_12_dp)
                 )
@@ -197,7 +202,7 @@ class CreateChannelFragment : Fragment(), CreateChannelView, ActionMode.Callback
             } else {
                 text_channel_type.text = getString(R.string.msg_public_channel)
                 text_channel_type_description.text =
-                        getString(R.string.msg_public_channel_description)
+                    getString(R.string.msg_public_channel_description)
                 image_channel_icon.setImageDrawable(
                     context?.getDrawable(R.drawable.ic_hashtag_black_12dp)
                 )
@@ -213,8 +218,8 @@ class CreateChannelFragment : Fragment(), CreateChannelView, ActionMode.Callback
     private fun setupRecyclerView() {
         ui {
             recycler_view.layoutManager =
-                    LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
-            recycler_view.addItemDecoration(DividerItemDecoration(it))
+                LinearLayoutManager(context, RecyclerView.VERTICAL, false)
+            recycler_view.addItemDecoration(DividerItemDecoration(it, DividerItemDecoration.HORIZONTAL))
             recycler_view.adapter = adapter
 
         }

app/src/main/java/chat/rocket/android/db/DatabaseManager.kt

@@ -2,7 +2,6 @@ package chat.rocket.android.db
 
 import android.app.Application
 import chat.rocket.android.db.model.BaseUserEntity
-import chat.rocket.android.db.model.ChatRoom
 import chat.rocket.android.db.model.ChatRoomEntity
 import chat.rocket.android.db.model.UserEntity
 import chat.rocket.android.db.model.UserStatus

app/src/main/java/chat/rocket/android/files/ui/FilesFragment.kt

@@ -8,6 +8,8 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.DividerItemDecoration.HORIZONTAL
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import chat.rocket.android.R
@@ -22,7 +24,6 @@ import chat.rocket.android.player.PlayerActivity
 import chat.rocket.android.util.extensions.inflate
 import chat.rocket.android.util.extensions.showToast
 import chat.rocket.android.util.extensions.ui
-import chat.rocket.android.widget.DividerItemDecoration
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_files.*
 import javax.inject.Inject
@@ -137,7 +138,7 @@ class FilesFragment : Fragment(), FilesView {
     private fun setupRecyclerView() {
         ui {
             recycler_view.layoutManager = linearLayoutManager
-            recycler_view.addItemDecoration(DividerItemDecoration(it))
+            recycler_view.addItemDecoration(DividerItemDecoration(it, HORIZONTAL))
             recycler_view.adapter = adapter
         }
     }

app/src/main/java/chat/rocket/android/helper/MessageParser.kt

@@ -16,9 +16,9 @@ import chat.rocket.android.R
 import chat.rocket.android.server.domain.PublicSettings
 import chat.rocket.android.server.domain.useRealName
 import chat.rocket.android.util.extensions.openTabbedUrl
-import chat.rocket.android.widget.emoji.EmojiParser
-import chat.rocket.android.widget.emoji.EmojiRepository
-import chat.rocket.android.widget.emoji.EmojiTypefaceSpan
+import chat.rocket.android.emoji.EmojiParser
+import chat.rocket.android.emoji.EmojiRepository
+import chat.rocket.android.emoji.EmojiTypefaceSpan
 import chat.rocket.common.model.SimpleUser
 import chat.rocket.core.model.Message
 import org.commonmark.node.AbstractVisitor

app/src/main/java/chat/rocket/android/members/ui/MemberBottomSheetFragment.kt

@@ -5,9 +5,9 @@ import com.google.android.material.bottomsheet.BottomSheetDialogFragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.view.isVisible
 import chat.rocket.android.R
 import chat.rocket.android.util.extensions.content
-import chat.rocket.android.util.extensions.setVisible
 import chat.rocket.android.util.extensions.textContent
 import kotlinx.android.synthetic.main.fragment_member_bottom_sheet.*
 
@@ -70,15 +70,15 @@ class MemberBottomSheetFragment: BottomSheetDialogFragment() {
         if (email.isNotEmpty()) {
             text_member_email_address.textContent = email
         } else {
-            text_email_address.setVisible(false)
-            text_member_email_address.setVisible(false)
+            text_email_address.isVisible = false
+            text_member_email_address.isVisible = false
         }
 
         if (utcOffset.isNotEmpty()){
             text_member_utc.content = utcOffset
         } else {
-            text_utc.setVisible(false)
-            text_member_utc.setVisible(false)
+            text_utc.isVisible = false
+            text_member_utc.isVisible = false
         }
     }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/members/ui/MembersFragment.kt

@@ -7,6 +7,8 @@ import androidx.recyclerview.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.DividerItemDecoration
 import chat.rocket.android.R
 import chat.rocket.android.chatroom.ui.ChatRoomActivity
 import chat.rocket.android.helper.EndlessRecyclerViewScrollListener
@@ -15,10 +17,8 @@ import chat.rocket.android.members.presentation.MembersPresenter
 import chat.rocket.android.members.presentation.MembersView
 import chat.rocket.android.members.uimodel.MemberUiModel
 import chat.rocket.android.util.extensions.inflate
-import chat.rocket.android.util.extensions.setVisible
 import chat.rocket.android.util.extensions.showToast
 import chat.rocket.android.util.extensions.ui
-import chat.rocket.android.widget.DividerItemDecoration
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_members.*
 import javax.inject.Inject
@@ -89,11 +89,11 @@ class MembersFragment : Fragment(), MembersView {
     }
 
     override fun showLoading() {
-        ui { view_loading.setVisible(true) }
+        ui { view_loading.isVisible = true }
     }
 
     override fun hideLoading() {
-        ui { view_loading.setVisible(false) }
+        ui { view_loading.isVisible = false }
     }
 
     override fun showMessage(resId: Int) {
@@ -113,7 +113,7 @@ class MembersFragment : Fragment(), MembersView {
     private fun setupRecyclerView() {
         ui {
             recycler_view.layoutManager = linearLayoutManager
-            recycler_view.addItemDecoration(DividerItemDecoration(it))
+            recycler_view.addItemDecoration(DividerItemDecoration(it, DividerItemDecoration.HORIZONTAL))
             recycler_view.adapter = adapter
         }
     }

app/src/main/java/chat/rocket/android/settings/password/ui/PasswordFragment.kt

@@ -7,10 +7,10 @@ import android.widget.Toast
 import chat.rocket.android.R
 import chat.rocket.android.settings.password.presentation.PasswordPresenter
 import chat.rocket.android.settings.password.presentation.PasswordView
-import chat.rocket.android.util.extensions.asObservable
 import chat.rocket.android.util.extensions.inflate
-import chat.rocket.android.util.extensions.textContent
 import androidx.appcompat.view.ActionMode
+import chat.rocket.android.util.extensions.asObservable
+import chat.rocket.android.util.extensions.textContent
 import chat.rocket.android.util.extensions.ui
 import dagger.android.support.AndroidSupportInjection
 import io.reactivex.disposables.CompositeDisposable

app/src/main/java/chat/rocket/android/util/extensions/Text.kt

@@ -7,8 +7,8 @@ import android.util.Base64
 import android.util.Patterns
 import android.widget.EditText
 import android.widget.TextView
-import chat.rocket.android.widget.emoji.EmojiParser
-import chat.rocket.android.widget.emoji.EmojiTypefaceSpan
+import chat.rocket.android.emoji.EmojiParser
+import chat.rocket.android.emoji.EmojiTypefaceSpan
 import org.json.JSONObject
 import ru.noties.markwon.Markwon
 import java.net.URLDecoder

app/src/main/java/chat/rocket/android/widget/emoji/Emoji.kt

-package chat.rocket.android.widget.emoji
-
-data class Emoji(
-        val shortname: String,
-        val shortnameAlternates: List<String>,
-        val unicode: String,
-        val keywords: List<String>,
-        val category: String,
-        val count: Int = 0
-)
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiListenerAdapter.kt

-package chat.rocket.android.widget.emoji
-
-abstract class EmojiListenerAdapter : EmojiKeyboardListener {
-
-    override fun onEmojiAdded(emoji: Emoji) {
-        // this space is for rent
-    }
-
-    override fun onNonEmojiKeyPressed(keyCode: Int) {
-        // this space is for rent
-    }
-}
\ No newline at end of file

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

@@ -61,7 +61,7 @@
                 android:contentDescription="@string/msg_content_description_show_attachment_options"
                 android:src="@drawable/ic_reaction_24dp" />
 
-            <chat.rocket.android.widget.emoji.ComposerEditText
+            <chat.rocket.android.emoji.ComposerEditText
                 android:id="@+id/text_message"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"

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

 <?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">
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
 
     <item
         android:id="@+id/action_members_list"
         android:title="@string/title_members_list"
-        app:showAsAction="never" />
+        android:showAsAction="never" />
 
     <item
         android:id="@+id/action_mentions"
@@ -15,15 +14,15 @@
     <item
         android:id="@+id/action_pinned_messages"
         android:title="@string/title_pinned_messages"
-        app:showAsAction="never" />
+        android:showAsAction="never" />
 
     <item
         android:id="@+id/action_favorite_messages"
         android:title="@string/title_favorite_messages"
-        app:showAsAction="never" />
+        android:showAsAction="never" />
 
     <item
         android:id="@+id/action_files"
         android:title="@string/msg_files"
-        app:showAsAction="never" />
+        android:showAsAction="never" />
 </menu>
\ No newline at end of file

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

@@ -6,13 +6,13 @@
         android:id="@+id/action_search"
         android:icon="@drawable/ic_search_white_24px"
         android:title="@string/action_search"
-        app:actionViewClass="androidx.appcompat.widget.SearchView"
-        app:showAsAction="ifRoom|collapseActionView" />
+        android:actionViewClass="androidx.appcompat.widget.SearchView"
+        android:showAsAction="ifRoom|collapseActionView" />
 
     <item
         android:id="@+id/action_sort"
         android:icon="@drawable/ic_sort"
         android:title="@string/menu_chatroom_sort"
-        app:showAsAction="always" />
+        android:showAsAction="always" />
 
 </menu>

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

@@ -6,5 +6,5 @@
         android:id="@+id/action_save_image"
         android:icon="@drawable/ic_file_download_white_24dp"
         android:title="@string/action_save_to_gallery"
-        app:showAsAction="always" />
+        android:showAsAction="always" />
 </menu>
\ No newline at end of file

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

@@ -234,7 +234,7 @@
     <string name="Slash_Topic_Description">Set topic</string>
 
     <!-- Emoji message-->
-    <string name="msg_no_recent_emoji">No recent emoji</string>
+    <string name="msg_no_recent_emoji">No recent emojis</string>
 
     <!-- Sorting and grouping-->
     <string name="menu_chatroom_sort">Sort</string>

dependencies.gradle

@@ -3,6 +3,7 @@ ext {
             java                  : JavaVersion.VERSION_1_8,
             compileSdk            : 28,
             targetSdk             : 28,
+            minSdk                : 21,
             buildTools            : '28.0.0-rc2',
             kotlin                : '1.2.50',
             coroutine             : '0.23.1',

emoji/.gitignore

+/build

emoji/build.gradle

+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion versions.compileSdk
+    buildToolsVersion versions.buildTools
+
+    defaultConfig {
+        minSdkVersion versions.minSdk
+        targetSdkVersion versions.targetSdk
+        versionCode 1
+        versionName "0.1"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation libraries.androidKtx
+    implementation libraries.appCompat
+    implementation libraries.kotlin
+    implementation libraries.constraintlayout
+    implementation libraries.recyclerview
+    implementation libraries.material
+}
+
+kotlin {
+    experimental {
+        coroutines "enable"
+    }
+}
+
+androidExtensions {
+    experimental = true
+}

emoji/proguard-rules.pro

+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

emoji/src/main/AndroidManifest.xml

+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="chat.rocket.android.emoji" />

app/src/main/java/chat/rocket/android/widget/emoji/CategoryPagerAdapter.kt → emoji/src/main/java/chat/rocket/android/emoji/CategoryPagerAdapter.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
-import androidx.viewpager.widget.PagerAdapter
-import androidx.recyclerview.widget.DefaultItemAnimator
-import androidx.recyclerview.widget.GridLayoutManager
-import androidx.recyclerview.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.TextView
-import chat.rocket.android.R
-import chat.rocket.android.util.extensions.setVisible
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.DefaultItemAnimator
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.viewpager.widget.PagerAdapter
+import kotlinx.android.synthetic.main.emoji_category_layout.view.*
 import java.util.*
 
-class CategoryPagerAdapter(val listener: EmojiKeyboardListener) : PagerAdapter() {
+internal class CategoryPagerAdapter(private val listener: EmojiKeyboardListener) : PagerAdapter() {
 
     override fun isViewFromObject(view: View, obj: Any): Boolean {
         return view == obj
@@ -20,29 +20,25 @@ class CategoryPagerAdapter(val listener: EmojiKeyboardListener) : PagerAdapter()
 
     override fun instantiateItem(container: ViewGroup, position: Int): Any {
         val view = LayoutInflater.from(container.context)
-                .inflate(R.layout.emoji_category_layout, container, false)
-        val layoutManager = GridLayoutManager(view.context, 8)
-        val recycler = view.findViewById(R.id.emojiRecyclerView) as RecyclerView
-        val adapter = EmojiAdapter(layoutManager.spanCount, listener)
-        val category = EmojiCategory.values().get(position)
-        val emojiNoRecentText : TextView = view.findViewById(R.id.text_no_recent_emoji)
-        val emojis = if (category != EmojiCategory.RECENTS) {
-            EmojiRepository.getEmojisByCategory(category)
-        } else {
-            EmojiRepository.getRecents()
-        }
-        val recentEmojiSize = EmojiRepository.getRecents().size
-        if (category == EmojiCategory.RECENTS && recentEmojiSize == 0){
-            emojiNoRecentText.setVisible(true)
-        }else{
-            emojiNoRecentText.setVisible(false)
+            .inflate(R.layout.emoji_category_layout, container, false)
+        with(view) {
+            val layoutManager = GridLayoutManager(context, 8)
+            val adapter = EmojiAdapter(layoutManager.spanCount, listener)
+            val category = EmojiCategory.values()[position]
+            val emojis = if (category != EmojiCategory.RECENTS) {
+                EmojiRepository.getEmojisByCategory(category)
+            } else {
+                EmojiRepository.getRecents()
+            }
+            val recentEmojiSize = EmojiRepository.getRecents().size
+            text_no_recent_emoji.isVisible = category == EmojiCategory.RECENTS && recentEmojiSize == 0
+            adapter.addEmojis(emojis)
+            emoji_recycler_view.layoutManager = layoutManager
+            emoji_recycler_view.itemAnimator = DefaultItemAnimator()
+            emoji_recycler_view.adapter = adapter
+            emoji_recycler_view.isNestedScrollingEnabled = false
+            container.addView(view)
         }
-        adapter.addEmojis(emojis)
-        recycler.layoutManager = layoutManager
-        recycler.itemAnimator = DefaultItemAnimator()
-        recycler.adapter = adapter
-        recycler.isNestedScrollingEnabled = false
-        container.addView(view)
         return view
     }
 
@@ -54,7 +50,11 @@ class CategoryPagerAdapter(val listener: EmojiKeyboardListener) : PagerAdapter()
 
     override fun getPageTitle(position: Int) = EmojiCategory.values()[position].textIcon()
 
-    class EmojiAdapter(val spanCount: Int, val listener: EmojiKeyboardListener) : RecyclerView.Adapter<EmojiRowViewHolder>() {
+    class EmojiAdapter(
+        private val spanCount: Int,
+        private val listener: EmojiKeyboardListener
+    ) : RecyclerView.Adapter<EmojiRowViewHolder>() {
+
         private var emojis = Collections.emptyList<Emoji>()
 
         fun addEmojis(emojis: List<Emoji>) {
@@ -74,7 +74,13 @@ class CategoryPagerAdapter(val listener: EmojiKeyboardListener) : PagerAdapter()
         override fun getItemCount(): Int = emojis.size
     }
 
-    class EmojiRowViewHolder(itemView: View, val itemCount: Int, val spanCount: Int, val listener: EmojiKeyboardListener) : RecyclerView.ViewHolder(itemView) {
+    class EmojiRowViewHolder(
+        itemView: View,
+        private val itemCount: Int,
+        private val spanCount: Int,
+        private val listener: EmojiKeyboardListener
+    ) : RecyclerView.ViewHolder(itemView) {
+
         private val emojiView: TextView = itemView.findViewById(R.id.emoji)
 
         fun bind(emoji: Emoji) {

app/src/main/java/chat/rocket/android/widget/emoji/ComposerEditText.kt → emoji/src/main/java/chat/rocket/android/emoji/ComposerEditText.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 import android.content.Context
 import androidx.appcompat.widget.AppCompatEditText

emoji/src/main/java/chat/rocket/android/emoji/Emoji.kt

+package chat.rocket.android.emoji
+
+data class Emoji(
+    val shortname: String,
+    val shortnameAlternates: List<String>,
+    val unicode: String,
+    val keywords: List<String>,
+    val category: String,
+    val count: Int = 0
+)
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiCategory.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiCategory.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
-import androidx.annotation.DrawableRes
 import android.text.SpannableString
 import android.text.Spanned
-import chat.rocket.android.R
+import androidx.annotation.DrawableRes
 
 enum class EmojiCategory {
     RECENTS {

app/src/main/java/chat/rocket/android/widget/emoji/EmojiKeyboardListener.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiKeyboardListener.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 interface EmojiKeyboardListener {
     /**
-     * When an emoji is selected on the picker.
+     * Callback when an emoji is selected on the picker (optional operation).
      *
      * @param emoji The selected emoji
      */
-    fun onEmojiAdded(emoji: Emoji)
+    fun onEmojiAdded(emoji: Emoji) {}
 
     /**
-     * When backspace key is clicked.
+     * Callback when backspace key is clicked (optional operation).
      *
      * @param keyCode The key code pressed as defined
      *
      * @see android.view.KeyEvent
      */
-    fun onNonEmojiKeyPressed(keyCode: Int)
+    fun onNonEmojiKeyPressed(keyCode: Int) {}
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiKeyboardPopup.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiKeyboardPopup.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 import android.content.Context
-import com.google.android.material.tabs.TabLayout
-import androidx.viewpager.widget.ViewPager
-import androidx.appcompat.app.AppCompatActivity
 import android.text.Editable
 import android.text.TextWatcher
 import android.view.KeyEvent
@@ -12,10 +9,16 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.EditText
 import android.widget.ImageView
-import chat.rocket.android.R
+import androidx.appcompat.app.AppCompatActivity
+import androidx.viewpager.widget.ViewPager
+import com.google.android.material.tabs.TabLayout
 
 
-class EmojiKeyboardPopup(context: Context, view: View) : OverKeyboardPopupWindow(context, view) {
+class EmojiKeyboardPopup(
+    context: Context,
+    view: View
+) : OverKeyboardPopupWindow(context, view) {
+
     private lateinit var viewPager: ViewPager
     private lateinit var tabLayout: TabLayout
     private lateinit var searchView: View
@@ -23,10 +26,6 @@ class EmojiKeyboardPopup(context: Context, view: View) : OverKeyboardPopupWindow
     private lateinit var parentContainer: ViewGroup
     var listener: EmojiKeyboardListener? = null
 
-    companion object {
-        const val PREF_EMOJI_RECENTS = "PREF_EMOJI_RECENTS"
-    }
-
     override fun onCreateView(inflater: LayoutInflater): View {
         val view = inflater.inflate(R.layout.emoji_keyboard, null)
         parentContainer = view.findViewById(R.id.emoji_keyboard_container)
@@ -58,14 +57,14 @@ class EmojiKeyboardPopup(context: Context, view: View) : OverKeyboardPopupWindow
                 is EmojiKeyboardListener -> it
                 else -> {
                     val fragments = (it as AppCompatActivity).supportFragmentManager.fragments
-                    if (fragments == null || fragments.size == 0 || !(fragments[0] is EmojiKeyboardListener)) {
+                    if (fragments.size == 0 || !(fragments[0] is EmojiKeyboardListener)) {
                         throw IllegalStateException("activity/fragment should implement Listener interface")
                     }
                     fragments[0] as EmojiKeyboardListener
                 }
             }
 
-            viewPager.adapter = CategoryPagerAdapter(object : EmojiListenerAdapter() {
+            viewPager.adapter = CategoryPagerAdapter(object : EmojiKeyboardListener {
                 override fun onEmojiAdded(emoji: Emoji) {
                     EmojiRepository.addToRecents(emoji)
                     callback.onEmojiAdded(emoji)
@@ -86,11 +85,11 @@ class EmojiKeyboardPopup(context: Context, view: View) : OverKeyboardPopupWindow
         }
     }
 
-    class EmojiTextWatcher(val editor: EditText) : TextWatcher {
+    class EmojiTextWatcher(private val editor: EditText) : TextWatcher {
         @Volatile private var emojiToRemove = mutableListOf<EmojiTypefaceSpan>()
 
         override fun afterTextChanged(s: Editable) {
-            val message = editor.getEditableText()
+            val message = editor.editableText
 
             // Commit the emoticons to be removed.
             for (span in emojiToRemove.toList()) {
@@ -112,7 +111,7 @@ class EmojiKeyboardPopup(context: Context, view: View) : OverKeyboardPopupWindow
         override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
             if (after < count) {
                 val end = start + count
-                val message = editor.getEditableText()
+                val message = editor.editableText
                 val list = message.getSpans(start, end, EmojiTypefaceSpan::class.java)
 
                 for (span in list) {
@@ -129,4 +128,8 @@ class EmojiKeyboardPopup(context: Context, view: View) : OverKeyboardPopupWindow
         override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
         }
     }
+
+    companion object {
+        const val PREF_EMOJI_RECENTS = "PREF_EMOJI_RECENTS"
+    }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiParser.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiParser.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 import android.text.SpannableString
 import android.text.Spanned
 
 class EmojiParser {
+
     companion object {
         /**
          * Parses a text string containing unicode characters and/or shortnames to a rendered
@@ -14,7 +15,7 @@ class EmojiParser {
          */
         fun parse(text: CharSequence): CharSequence {
             val unicodedText = EmojiRepository.shortnameToUnicode(text, true)
-            var spannable = SpannableString.valueOf(unicodedText)
+            val spannable = SpannableString.valueOf(unicodedText)
             val typeface = EmojiRepository.cachedTypeface
             // Look for groups of emojis, set a EmojiTypefaceSpan with the emojione font.
             val length = spannable.length
@@ -49,12 +50,5 @@ class EmojiParser {
             }
             return spannable
         }
-
-        private fun calculateSurrogatePairs(scalar: Int): Pair<Int, Int> {
-            val temp: Int = (scalar - 0x10000) / 0x400
-            val s1: Int = Math.floor(temp.toDouble()).toInt() + 0xD800
-            val s2: Int = ((scalar - 0x10000) % 0x400) + 0xDC00
-            return Pair(s1, s2)
-        }
     }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiPickerPopup.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiPickerPopup.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 import android.app.Dialog
 import android.content.Context
@@ -9,12 +9,11 @@ import android.view.LayoutInflater
 import android.view.Window
 import android.view.WindowManager
 import android.widget.ImageView
-import chat.rocket.android.R
+import kotlinx.android.synthetic.main.emoji_picker.*
 
 
 class EmojiPickerPopup(context: Context) : Dialog(context) {
-    private lateinit var viewPager: ViewPager
-    private lateinit var tabLayout: TabLayout
+
     var listener: EmojiKeyboardListener? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -22,9 +21,7 @@ class EmojiPickerPopup(context: Context) : Dialog(context) {
         requestWindowFeature(Window.FEATURE_NO_TITLE)
         setContentView(R.layout.emoji_picker)
 
-        viewPager = findViewById(R.id.pager_categories)
-        tabLayout = findViewById(R.id.tabs)
-        tabLayout.setupWithViewPager(viewPager)
+        tabs.setupWithViewPager(pager_categories)
         setupViewPager()
         setSize()
     }
@@ -38,7 +35,7 @@ class EmojiPickerPopup(context: Context) : Dialog(context) {
     }
 
     private fun setupViewPager() {
-        viewPager.adapter = CategoryPagerAdapter(object : EmojiListenerAdapter() {
+        pager_categories.adapter = CategoryPagerAdapter(object : EmojiKeyboardListener {
             override fun onEmojiAdded(emoji: Emoji) {
                 EmojiRepository.addToRecents(emoji)
                 dismiss()
@@ -47,7 +44,7 @@ class EmojiPickerPopup(context: Context) : Dialog(context) {
         })
 
         for (category in EmojiCategory.values()) {
-            val tab = tabLayout.getTabAt(category.ordinal)
+            val tab = tabs.getTabAt(category.ordinal)
             val tabView = LayoutInflater.from(context).inflate(R.layout.emoji_picker_tab, null)
             tab?.customView = tabView
             val textView = tabView.findViewById(R.id.image_category) as ImageView
@@ -56,6 +53,6 @@ class EmojiPickerPopup(context: Context) : Dialog(context) {
 
         val currentTab = if (EmojiRepository.getRecents().isEmpty()) EmojiCategory.PEOPLE.ordinal else
             EmojiCategory.RECENTS.ordinal
-        viewPager.currentItem = currentTab
+        pager_categories.currentItem = currentTab
     }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/widget/emoji/EmojiReactionListener.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiReactionListener.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 interface EmojiReactionListener {
     /**

app/src/main/java/chat/rocket/android/widget/emoji/EmojiRepository.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiRepository.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 import android.content.Context
 import android.content.SharedPreferences
 import android.graphics.Typeface
-import android.os.Build
 import org.json.JSONArray
 import org.json.JSONObject
 import java.io.BufferedReader
@@ -54,10 +53,6 @@ object EmojiRepository {
      */
     fun getAll() = ALL_EMOJIS
 
-//    fun findEmojiByUnicode(unicode: Int) {
-//        ALL_EMOJIS.find { it.unicode == }
-//    }
-
     /**
      * Get all emojis for a given category.
      *
@@ -108,7 +103,7 @@ object EmojiRepository {
                 list.add(it.copy(count = useCount))
             }
         }
-        Collections.sort(list, { o1, o2 ->
+        list.sortWith(Comparator { o1, o2 ->
             o2.count - o1.count
         })
         return list
@@ -147,10 +142,10 @@ object EmojiRepository {
             return null
         }
         return Emoji(shortname = json.getString("shortname"),
-                unicode = json.getString("unicode"),
-                shortnameAlternates = buildStringListFromJsonArray(json.getJSONArray("shortnameAlternates")),
-                category = json.getString("category"),
-                keywords = buildStringListFromJsonArray(json.getJSONArray("keywords")))
+            unicode = json.getString("unicode"),
+            shortnameAlternates = buildStringListFromJsonArray(json.getJSONArray("shortnameAlternates")),
+            category = json.getString("category"),
+            keywords = buildStringListFromJsonArray(json.getJSONArray("keywords")))
     }
 
     private fun buildStringListFromJsonArray(array: JSONArray): List<String> {

app/src/main/java/chat/rocket/android/widget/emoji/EmojiTypefaceSpan.kt → emoji/src/main/java/chat/rocket/android/emoji/EmojiTypefaceSpan.kt

-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 import android.graphics.Paint
 import android.graphics.Typeface

app/src/main/java/chat/rocket/android/widget/emoji/OverKeyboardPopupWindow.kt → emoji/src/main/java/chat/rocket/android/emoji/OverKeyboardPopupWindow.kt

@@ -16,21 +16,26 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package chat.rocket.android.widget.emoji
+package chat.rocket.android.emoji
 
 import android.content.Context
 import android.graphics.Point
 import android.graphics.Rect
 import android.os.Build
-import android.view.*
+import android.view.Gravity
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewTreeObserver
+import android.view.WindowManager
 import android.widget.PopupWindow
-import chat.rocket.android.BuildConfig
-import chat.rocket.android.R
 
 /**
  * Base class to create popup window that appears over software keyboard.
  */
-abstract class OverKeyboardPopupWindow(val context: Context, private val rootView: View) : PopupWindow(context), ViewTreeObserver.OnGlobalLayoutListener {
+abstract class OverKeyboardPopupWindow(
+    val context: Context,
+    private val rootView: View
+) : PopupWindow(context), ViewTreeObserver.OnGlobalLayoutListener {
 
     /**
      * @return keyboard height in pixels
@@ -154,6 +159,4 @@ abstract class OverKeyboardPopupWindow(val context: Context, private val rootVie
     abstract fun onCreateView(inflater: LayoutInflater): View
 
     abstract fun onViewCreated(view: View)
-
-
 }
\ No newline at end of file