Refactoring / Use view ViewStub to avoid layout xml duplication

vector/src/main/java/im/vector/riotredesign/features/home/AvatarRenderer.kt

@@ -20,6 +20,7 @@ import android.content.Context
 import android.graphics.drawable.Drawable
 import android.widget.ImageView
 import androidx.annotation.AnyThread
+import androidx.annotation.ColorRes
 import androidx.annotation.UiThread
 import androidx.core.content.ContextCompat
 import com.amulyakhare.textdrawable.TextDrawable
@@ -77,31 +78,35 @@ object AvatarRenderer {
 
     @AnyThread
     fun getPlaceholderDrawable(context: Context, identifier: String, text: String): Drawable {
-        val avatarColor = ContextCompat.getColor(context, getAvatarColor(identifier))
+        val avatarColor = ContextCompat.getColor(context, getColorFromUserId(identifier))
         return if (text.isEmpty()) {
             TextDrawable.builder().buildRound("", avatarColor)
         } else {
             val isUserId = MatrixPatterns.isUserId(text)
             val firstLetterIndex = if (isUserId) 1 else 0
             val firstLetter = text[firstLetterIndex].toString().toUpperCase()
-            TextDrawable.builder().buildRound(firstLetter, avatarColor)
+            TextDrawable.builder()
+                    .beginConfig()
+                    .bold()
+                    .endConfig()
+                    .buildRound(firstLetter, avatarColor)
         }
     }
 
     // PRIVATE API *********************************************************************************
 
 
-    private fun getAvatarColor(text: String? = null): Int {
+//    private fun getAvatarColor(text: String? = null): Int {
-        var colorIndex: Long = 0
+//        var colorIndex: Long = 0
-        if (!text.isNullOrEmpty()) {
+//        if (!text.isNullOrEmpty()) {
-            var sum: Long = 0
+//            var sum: Long = 0
-            for (i in 0 until text.length) {
+//            for (i in 0 until text.length) {
-                sum += text[i].toLong()
+//                sum += text[i].toLong()
-            }
+//            }
-            colorIndex = sum % AVATAR_COLOR_LIST.size
+//            colorIndex = sum % AVATAR_COLOR_LIST.size
-        }
+//        }
-        return AVATAR_COLOR_LIST[colorIndex.toInt()]
+//        return AVATAR_COLOR_LIST[colorIndex.toInt()]
-    }
+//    }
 
     private fun buildGlideRequest(glideRequest: GlideRequests, avatarUrl: String?): GlideRequest<Drawable> {
         val resolvedUrl = Matrix.getInstance().currentSession!!.contentUrlResolver()
@@ -112,4 +117,32 @@ object AvatarRenderer {
                 .apply(RequestOptions.circleCropTransform())
     }
 
+
+    //Based on riot-web implementation
+    @ColorRes
+    fun getColorFromUserId(sender: String): Int {
+        var hash = 0
+        var i = 0
+        var chr: Char
+        if (sender.isEmpty()) {
+            return R.color.username_1
+        }
+        while (i < sender.length) {
+            chr = sender[i]
+            hash = (hash shl 5) - hash + chr.toInt()
+            hash = hash or 0
+            i++
+        }
+        val cI = Math.abs(hash) % 8 + 1
+        return when (cI) {
+            1    -> R.color.username_1
+            2    -> R.color.username_2
+            3    -> R.color.username_3
+            4    -> R.color.username_4
+            5    -> R.color.username_5
+            6    -> R.color.username_6
+            7    -> R.color.username_7
+            else -> R.color.username_8
+        }
+    }
 }

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/factory/MessageItemFactory.kt

@@ -32,6 +32,7 @@ import im.vector.riotredesign.core.extensions.localDateTime
 import im.vector.riotredesign.core.linkify.VectorLinkify
 import im.vector.riotredesign.core.resources.ColorProvider
 import im.vector.riotredesign.core.utils.DebouncedClickListener
+import im.vector.riotredesign.features.home.AvatarRenderer
 import im.vector.riotredesign.features.home.room.detail.timeline.TimelineEventController
 import im.vector.riotredesign.features.home.room.detail.timeline.helper.TimelineDateFormatter
 import im.vector.riotredesign.features.home.room.detail.timeline.helper.TimelineMediaSizeProvider
@@ -70,7 +71,7 @@ class MessageItemFactory(private val colorProvider: ColorProvider,
         val avatarUrl = event.senderAvatar
         val memberName = event.senderName ?: event.root.sender ?: ""
         val formattedMemberName = span(memberName) {
-            textColor = colorProvider.getColor(getColorFor(event.root.sender ?: ""))
+            textColor = colorProvider.getColor(AvatarRenderer.getColorFromUserId(event.root.sender ?: ""))
         }
         val informationData = MessageInformationData(eventId = eventId,
                 senderId = event.root.sender ?: "",

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/AEventItemBase.kt

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2019 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package im.vector.riotredesign.features.home.room.detail.timeline.item
+
+import android.content.Context
+import android.util.TypedValue
+import android.view.View
+import android.view.ViewStub
+import androidx.annotation.IdRes
+import androidx.constraintlayout.widget.Guideline
+import im.vector.riotredesign.R
+import im.vector.riotredesign.core.epoxy.VectorEpoxyHolder
+import im.vector.riotredesign.core.epoxy.VectorEpoxyModel
+
+abstract class AEventItemBase<H : AEventItemBase.BaseHolder> : VectorEpoxyModel<H>() {
+
+    var avatarStyle: AvatarStyle = Companion.AvatarStyle.MEDIUM
+
+    override fun bind(holder: H) {
+        super.bind(holder)
+        //optimize?
+        val px = dpToPx(avatarStyle.avatarSizeDP, holder.view.context)
+        holder.leftGuideline.setGuidelineBegin(px)
+    }
+
+
+    override fun getViewType(): Int {
+        return getStubType()
+    }
+
+    abstract fun getStubType(): Int
+
+
+    abstract class BaseHolder : VectorEpoxyHolder() {
+
+        val leftGuideline by bind<Guideline>(R.id.messageStartGuideline)
+
+        @IdRes
+        abstract fun getStubId(): Int
+
+        override fun bindView(itemView: View) {
+            super.bindView(itemView)
+            inflateStub()
+        }
+
+        private fun inflateStub() {
+            view.findViewById<ViewStub>(getStubId()).inflate()
+        }
+
+    }
+
+    companion object {
+
+        enum class AvatarStyle(val avatarSizeDP: Int) {
+            BIG(50),
+            MEDIUM(40),
+            SMALL(30),
+            NONE(0)
+        }
+
+        fun dpToPx(dp: Int, context: Context): Int {
+            return TypedValue.applyDimension(
+                    TypedValue.COMPLEX_UNIT_DIP,
+                    dp.toFloat(),
+                    context.resources.displayMetrics
+            ).toInt()
+        }
+    }
+}

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/AbsMessageItem.kt

@@ -19,13 +19,15 @@ package im.vector.riotredesign.features.home.room.detail.timeline.item
 import android.view.View
 import android.widget.ImageView
 import android.widget.TextView
+import im.vector.riotredesign.R
 import com.airbnb.epoxy.EpoxyAttribute
 import com.jakewharton.rxbinding2.view.RxView
 import im.vector.riotredesign.core.epoxy.VectorEpoxyHolder
 import im.vector.riotredesign.core.epoxy.VectorEpoxyModel
 import im.vector.riotredesign.features.home.AvatarRenderer
 
-abstract class AbsMessageItem<H : AbsMessageItem.Holder> : VectorEpoxyModel<H>() {
+
+abstract class AbsMessageItem<H : AbsMessageItem.Holder> : AEventItemBase<H>() {
 
     abstract val informationData: MessageInformationData
 
@@ -41,6 +43,14 @@ abstract class AbsMessageItem<H : AbsMessageItem.Holder> : VectorEpoxyModel<H>()
     override fun bind(holder: H) {
         super.bind(holder)
         if (informationData.showInformation) {
+
+            val lp = holder.avatarImageView.layoutParams?.apply {
+                val size = dpToPx(avatarStyle.avatarSizeDP, holder.view.context)
+                height = size
+                width = size
+            }
+            holder.avatarImageView.layoutParams = lp
+
             holder.avatarImageView.visibility = View.VISIBLE
             holder.avatarImageView.setOnClickListener(avatarClickListener)
             holder.memberNameView.visibility = View.VISIBLE
@@ -63,10 +73,11 @@ abstract class AbsMessageItem<H : AbsMessageItem.Holder> : VectorEpoxyModel<H>()
         alpha = if (informationData.sendState.isSent()) 1f else 0.5f
     }
 
-    abstract class Holder : VectorEpoxyHolder() {
+    abstract class Holder : BaseHolder() {
-        abstract val avatarImageView: ImageView
+
-        abstract val memberNameView: TextView
+        val avatarImageView by bind<ImageView>(R.id.messageAvatarImageView)
-        abstract val timeView: TextView
+        val memberNameView by bind<TextView>(R.id.messageMemberNameView)
+        val timeView by bind<TextView>(R.id.messageTimeView)
     }
 
 }

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/DefaultItem.kt

@@ -20,19 +20,26 @@ import android.widget.TextView
 import com.airbnb.epoxy.EpoxyAttribute
 import com.airbnb.epoxy.EpoxyModelClass
 import im.vector.riotredesign.R
-import im.vector.riotredesign.core.epoxy.VectorEpoxyHolder
-import im.vector.riotredesign.core.epoxy.VectorEpoxyModel
 
-@EpoxyModelClass(layout = R.layout.item_timeline_event_default)
+@EpoxyModelClass(layout = R.layout.item_timeline_event_base_noinfo)
-abstract class DefaultItem : VectorEpoxyModel<DefaultItem.Holder>() {
+abstract class DefaultItem : AEventItemBase<DefaultItem.Holder>() {
 
-    @EpoxyAttribute var text: CharSequence? = null
+    @EpoxyAttribute
+    var text: CharSequence? = null
 
     override fun bind(holder: Holder) {
         holder.messageView.text = text
     }
 
-    class Holder : VectorEpoxyHolder() {
+    override fun getStubType(): Int = STUB_ID
+
+    class Holder : BaseHolder() {
+        override fun getStubId(): Int = STUB_ID
+
         val messageView by bind<TextView>(R.id.stateMessageView)
     }
+
+    companion object {
+        private val STUB_ID = R.id.messageContentDefaultStub
+    }
 }

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/MergedHeaderItem.kt

@@ -24,15 +24,14 @@ import android.widget.ImageView
 import android.widget.TextView
 import androidx.core.view.children
 import im.vector.riotredesign.R
-import im.vector.riotredesign.core.epoxy.VectorEpoxyHolder
-import im.vector.riotredesign.core.epoxy.VectorEpoxyModel
 import im.vector.riotredesign.features.home.AvatarRenderer
 
+
 data class MergedHeaderItem(private val isCollapsed: Boolean,
-                       private val mergeId: String,
+                            private val mergeId: String,
-                       private val mergeData: List<Data>,
+                            private val mergeData: List<Data>,
-                       private val onCollapsedStateChanged: (Boolean) -> Unit
+                            private val onCollapsedStateChanged: (Boolean) -> Unit
-) : VectorEpoxyModel<MergedHeaderItem.Holder>() {
+) : AEventItemBase<MergedHeaderItem.Holder>() {
 
     private val distinctMergeData = mergeData.distinctBy { it.userId }
 
@@ -41,13 +40,15 @@ data class MergedHeaderItem(private val isCollapsed: Boolean,
     }
 
     override fun getDefaultLayout(): Int {
-        return R.layout.item_timeline_event_merged_header
+        return R.layout.item_timeline_event_base_noinfo
     }
 
     override fun createNewHolder(): Holder {
         return Holder()
     }
 
+    override fun getStubType(): Int = STUB_ID
+
     override fun bind(holder: Holder) {
         super.bind(holder)
         holder.expandView.setOnClickListener {
@@ -84,11 +85,17 @@ data class MergedHeaderItem(private val isCollapsed: Boolean,
             val avatarUrl: String?
     )
 
-    class Holder : VectorEpoxyHolder() {
+    class Holder : BaseHolder() {
+        override fun getStubId(): Int = STUB_ID
+
         val expandView by bind<TextView>(R.id.itemMergedExpandTextView)
         val summaryView by bind<TextView>(R.id.itemMergedSummaryTextView)
         val separatorView by bind<View>(R.id.itemMergedSeparatorView)
         val avatarListView by bind<ViewGroup>(R.id.itemMergedAvatarListView)
 
     }
+
+    companion object {
+        private val STUB_ID = R.id.messageContentMergedheaderStub
+    }
 }

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/MessageFileItem.kt

@@ -26,13 +26,18 @@ import com.airbnb.epoxy.EpoxyAttribute
 import com.airbnb.epoxy.EpoxyModelClass
 import im.vector.riotredesign.R
 
-@EpoxyModelClass(layout = R.layout.item_timeline_event_file_message)
+@EpoxyModelClass(layout = R.layout.item_timeline_event_base)
 abstract class MessageFileItem : AbsMessageItem<MessageFileItem.Holder>() {
 
-    @EpoxyAttribute var filename: CharSequence = ""
+    @EpoxyAttribute
-    @EpoxyAttribute @DrawableRes var iconRes: Int = 0
+    var filename: CharSequence = ""
-    @EpoxyAttribute override lateinit var informationData: MessageInformationData
+    @EpoxyAttribute
-    @EpoxyAttribute var clickListener: View.OnClickListener? = null
+    @DrawableRes
+    var iconRes: Int = 0
+    @EpoxyAttribute
+    override lateinit var informationData: MessageInformationData
+    @EpoxyAttribute
+    var clickListener: View.OnClickListener? = null
 
     override fun bind(holder: Holder) {
         super.bind(holder)
@@ -43,15 +48,19 @@ abstract class MessageFileItem : AbsMessageItem<MessageFileItem.Holder>() {
         holder.filenameView.paintFlags = (holder.filenameView.paintFlags or Paint.UNDERLINE_TEXT_FLAG)
     }
 
+    override fun getStubType(): Int = STUB_ID
 
     class Holder : AbsMessageItem.Holder() {
-        override val avatarImageView by bind<ImageView>(R.id.messageAvatarImageView)
+        override fun getStubId(): Int = STUB_ID
-        override val memberNameView by bind<TextView>(R.id.messageMemberNameView)
+
-        override val timeView by bind<TextView>(R.id.messageTimeView)
         val fileLayout by bind<ViewGroup>(R.id.messageFileLayout)
         val fileImageView by bind<ImageView>(R.id.messageFileImageView)
         val filenameView by bind<TextView>(R.id.messageFilenameView)
+
     }
 
+    companion object {
+        private val STUB_ID = R.id.messageContentFileStub
+    }
 
 }

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/MessageImageVideoItem.kt

@@ -19,20 +19,23 @@ package im.vector.riotredesign.features.home.room.detail.timeline.item
 import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageView
-import android.widget.TextView
 import com.airbnb.epoxy.EpoxyAttribute
 import com.airbnb.epoxy.EpoxyModelClass
 import im.vector.riotredesign.R
 import im.vector.riotredesign.features.home.room.detail.timeline.helper.ContentUploadStateTrackerBinder
 import im.vector.riotredesign.features.media.ImageContentRenderer
 
-@EpoxyModelClass(layout = R.layout.item_timeline_event_image_video_message)
+@EpoxyModelClass(layout = R.layout.item_timeline_event_base)
 abstract class MessageImageVideoItem : AbsMessageItem<MessageImageVideoItem.Holder>() {
 
-    @EpoxyAttribute lateinit var mediaData: ImageContentRenderer.Data
+    @EpoxyAttribute
-    @EpoxyAttribute override lateinit var informationData: MessageInformationData
+    lateinit var mediaData: ImageContentRenderer.Data
-    @EpoxyAttribute var playable: Boolean = false
+    @EpoxyAttribute
-    @EpoxyAttribute var clickListener: View.OnClickListener? = null
+    override lateinit var informationData: MessageInformationData
+    @EpoxyAttribute
+    var playable: Boolean = false
+    @EpoxyAttribute
+    var clickListener: View.OnClickListener? = null
 
     override fun bind(holder: Holder) {
         super.bind(holder)
@@ -49,13 +52,21 @@ abstract class MessageImageVideoItem : AbsMessageItem<MessageImageVideoItem.Hold
         super.unbind(holder)
     }
 
+    override fun getStubType(): Int = STUB_ID
+
     class Holder : AbsMessageItem.Holder() {
-        override val avatarImageView by bind<ImageView>(R.id.messageAvatarImageView)
+
-        override val memberNameView by bind<TextView>(R.id.messageMemberNameView)
+        override fun getStubId(): Int = STUB_ID
-        override val timeView by bind<TextView>(R.id.messageTimeView)
+
         val progressLayout by bind<ViewGroup>(R.id.messageMediaUploadProgressLayout)
         val imageView by bind<ImageView>(R.id.messageThumbnailView)
         val playContentView by bind<ImageView>(R.id.messageMediaPlayView)
+
+    }
+
+
+    companion object {
+        private val STUB_ID = R.id.messageContentMediaStub
     }
 
 }

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/MessageTextItem.kt

@@ -16,6 +16,7 @@
 
 package im.vector.riotredesign.features.home.room.detail.timeline.item
 
+import android.text.Spannable
 import android.view.View
 import android.widget.ImageView
 import android.widget.TextView
@@ -33,7 +34,7 @@ import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
-@EpoxyModelClass(layout = R.layout.item_timeline_event_text_message)
+@EpoxyModelClass(layout = R.layout.item_timeline_event_base)
 abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
 
     @EpoxyAttribute
@@ -67,12 +68,12 @@ abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
         }
     }
 
+    override fun getStubType(): Int = R.id.messageContentTextStub
+
     class Holder : AbsMessageItem.Holder() {
-        override val avatarImageView by bind<ImageView>(R.id.messageAvatarImageView)
-        override val memberNameView by bind<TextView>(R.id.messageMemberNameView)
-        override val timeView by bind<TextView>(R.id.messageTimeView)
         val messageView by bind<AppCompatTextView>(R.id.messageTextView)
+        override fun getStubId(): Int = R.id.messageContentTextStub
+
     }
 
-
 }

vector/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/item/NoticeItem.kt

@@ -22,30 +22,41 @@ import android.widget.TextView
 import com.airbnb.epoxy.EpoxyAttribute
 import com.airbnb.epoxy.EpoxyModelClass
 import im.vector.riotredesign.R
-import im.vector.riotredesign.core.epoxy.VectorEpoxyHolder
-import im.vector.riotredesign.core.epoxy.VectorEpoxyModel
 import im.vector.riotredesign.features.home.AvatarRenderer
 
-@EpoxyModelClass(layout = R.layout.item_timeline_event_notice)
+@EpoxyModelClass(layout = R.layout.item_timeline_event_base_noinfo)
-abstract class NoticeItem : VectorEpoxyModel<NoticeItem.Holder>() {
+abstract class NoticeItem : AEventItemBase<NoticeItem.Holder>() {
 
-    @EpoxyAttribute var noticeText: CharSequence? = null
+    @EpoxyAttribute
-    @EpoxyAttribute var avatarUrl: String? = null
+    var noticeText: CharSequence? = null
-    @EpoxyAttribute var userId: String = ""
+    @EpoxyAttribute
-    @EpoxyAttribute var memberName: CharSequence? = null
+    var avatarUrl: String? = null
+    @EpoxyAttribute
+    var userId: String = ""
+    @EpoxyAttribute
+    var memberName: CharSequence? = null
 
 
     @EpoxyAttribute
     var longClickListener: View.OnLongClickListener? = null
 
     override fun bind(holder: Holder) {
+        super.bind(holder)
         holder.noticeTextView.text = noticeText
         AvatarRenderer.render(avatarUrl, userId, memberName?.toString(), holder.avatarImageView)
         holder.view.setOnLongClickListener(longClickListener)
     }
 
-    class Holder : VectorEpoxyHolder() {
+    override fun getStubType(): Int = STUB_ID
+
+    class Holder : BaseHolder() {
+        override fun getStubId(): Int = STUB_ID
+
         val avatarImageView by bind<ImageView>(R.id.itemNoticeAvatarView)
         val noticeTextView by bind<TextView>(R.id.itemNoticeTextView)
     }
+
+    companion object {
+        private val STUB_ID = R.id.messageContentNoticeStub
+    }
 }

vector/src/main/res/layout/item_timeline_event_base.xml

@@ -4,37 +4,42 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:paddingLeft="8dp"
-    android:addStatesFromChildren="true"
+    android:paddingRight="8dp">
-    android:paddingLeft="16dp"
-    android:paddingRight="16dp">
 
 
     <ImageView
         android:id="@+id/messageAvatarImageView"
         android:layout_width="44dp"
         android:layout_height="44dp"
-        android:layout_marginTop="8dp"
+        android:layout_marginTop="4dp"
-        android:layout_marginBottom="8dp"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
         tools:src="@tools:sample/avatars" />
 
+    <androidx.constraintlayout.widget.Guideline
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/messageStartGuideline"
+        tools:layout_constraintGuide_begin="44dp"
+        android:orientation="vertical"/>
+
     <TextView
         android:id="@+id/messageMemberNameView"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:layout_marginStart="56dp"
+        android:layout_marginStart="8dp"
-        android:layout_marginLeft="56dp"
+        android:layout_marginLeft="8dp"
-        android:layout_marginTop="8dp"
+        android:layout_marginEnd="4dp"
-        android:layout_marginEnd="8dp"
+        android:layout_marginTop="4dp"
         android:layout_marginRight="8dp"
         android:ellipsize="end"
         android:maxLines="1"
         android:textSize="15sp"
+        android:textStyle="bold"
         app:layout_constraintEnd_toStartOf="@+id/messageTimeView"
         app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintStart_toEndOf="@id/messageStartGuideline"
         app:layout_constraintTop_toTopOf="parent"
         tools:text="@tools:sample/full_names" />
 
@@ -51,21 +56,26 @@
         app:layout_constraintTop_toTopOf="@id/messageMemberNameView"
         tools:text="@tools:sample/date/hhmm" />
 
-    <TextView
+
-        android:id="@+id/messageTextView"
+    <ViewStub
-        android:layout_width="0dp"
+        tools:visibility="visible"
-        android:layout_height="wrap_content"
+        android:id="@+id/messageContentTextStub"
-        android:layout_marginStart="56dp"
+        style="@style/TimelineContentStubLayoutParams"
-        android:layout_marginLeft="56dp"
+        android:inflatedId="@id/messageTextView"
-        android:layout_marginBottom="8dp"
+        android:layout="@layout/item_timeline_event_text_message_stub"
-        android:clickable="true"
+        tools:ignore="MissingConstraints"/>
-        android:textColor="@color/dark_grey"
+
-        android:textSize="14sp"
+    <ViewStub
-        app:layout_constraintBottom_toBottomOf="parent"
+        android:id="@+id/messageContentMediaStub"
-        app:layout_constraintEnd_toEndOf="parent"
+        style="@style/TimelineContentStubLayoutParams"
-        app:layout_constraintStart_toStartOf="parent"
+        android:layout="@layout/item_timeline_event_media_message_stub"
-        app:layout_constraintTop_toBottomOf="@+id/messageMemberNameView"
+        tools:ignore="MissingConstraints" />
-        tools:text="Alright finished work, heading there in about 20 mins…
Ping me when you’re outside" />
+
+    <ViewStub
+        android:id="@+id/messageContentFileStub"
+        style="@style/TimelineContentStubLayoutParams"
+        android:layout="@layout/item_timeline_event_file_stub"
+        tools:ignore="MissingConstraints" />
 
 
 </androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_timeline_event_base_noinfo.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:paddingLeft="8dp"
+    android:paddingRight="8dp">
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/messageStartGuideline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        tools:layout_constraintGuide_begin="44dp" />
+
+    <ViewStub
+        android:id="@+id/messageContentNoticeStub"
+        style="@style/TimelineContentStubNoInfoLayoutParams"
+        android:layout="@layout/item_timeline_event_notice_stub"
+        tools:ignore="MissingConstraints"
+        tools:visibility="visible" />
+
+    <ViewStub
+        android:id="@+id/messageContentDefaultStub"
+        style="@style/TimelineContentStubNoInfoLayoutParams"
+        android:inflatedId="@+id/stateMessageView"
+        android:layout="@layout/item_timeline_event_default_stub"
+        tools:ignore="MissingConstraints" />
+
+    <ViewStub
+        android:id="@+id/messageContentBlankStub"
+        style="@style/TimelineContentStubNoInfoLayoutParams"
+        android:layout="@layout/item_timeline_event_blank_stub"
+        tools:ignore="MissingConstraints" />
+
+    <ViewStub
+        android:id="@+id/messageContentMergedheaderStub"
+        style="@style/TimelineContentStubNoInfoLayoutParams"
+        android:layout="@layout/item_timeline_event_merged_header_stub"
+        tools:ignore="MissingConstraints" />
+
+
+</androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_timeline_event_default_stub.xml

@@ -4,10 +4,8 @@
     android:id="@+id/stateMessageView"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_marginStart="64dp"
-    android:layout_marginLeft="64dp"
     android:gravity="center_vertical"
-    android:padding="16dp"
+    android:padding="8dp"
     android:textColor="?attr/colorAccent"
     android:textSize="14sp"
     android:textStyle="italic"

vector/src/main/res/layout/item_timeline_event_file_message.xml

@@ -1,134 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-  ~ Copyright 2019 New Vector Ltd
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~ http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
-
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:addStatesFromChildren="true"
-    android:paddingLeft="16dp"
-    android:paddingRight="16dp">
-
-
-    <ImageView
-        android:id="@+id/messageAvatarImageView"
-        android:layout_width="@dimen/chat_avatar_size"
-        android:layout_height="@dimen/chat_avatar_size"
-        android:layout_marginTop="8dp"
-        android:layout_marginBottom="8dp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        tools:src="@tools:sample/avatars" />
-
-    <TextView
-        android:id="@+id/messageMemberNameView"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="64dp"
-        android:layout_marginLeft="64dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="8dp"
-        android:layout_marginRight="8dp"
-        android:ellipsize="end"
-        android:maxLines="1"
-        android:textSize="15sp"
-        app:layout_constraintEnd_toStartOf="@+id/messageTimeView"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        tools:text="@tools:sample/full_names" />
-
-
-    <TextView
-        android:id="@+id/messageTimeView"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="8dp"
-        android:layout_marginLeft="8dp"
-        android:textColor="@color/brown_grey"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintTop_toTopOf="@id/messageMemberNameView"
-        tools:text="@tools:sample/date/hhmm" />
-
-
-    <LinearLayout
-        android:id="@+id/messageFileLayout"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="64dp"
-        android:layout_marginLeft="64dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="32dp"
-        android:layout_marginRight="32dp"
-        android:layout_marginBottom="8dp"
-        android:orientation="horizontal"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/messageMemberNameView">
-
-        <ImageView
-            android:id="@+id/messageFilee2eIcon"
-            android:layout_width="14dp"
-            android:layout_height="14dp"
-            android:src="@drawable/e2e_verified"
-            android:visibility="gone" />
-
-        <!-- the media type -->
-        <ImageView
-            android:id="@+id/messageFileImageView"
-            android:layout_width="@dimen/chat_avatar_size"
-            android:layout_height="@dimen/chat_avatar_size"
-            android:layout_marginStart="4dp"
-            android:layout_marginLeft="4dp"
-            android:src="@drawable/filetype_image" />
-
-        <!-- the media -->
-        <TextView
-            android:id="@+id/messageFilenameView"
-            android:layout_width="0dp"
-            android:layout_height="@dimen/chat_avatar_size"
-            android:layout_marginStart="4dp"
-            android:layout_marginLeft="4dp"
-            android:layout_weight="1"
-            android:autoLink="none"
-            android:gravity="center_vertical"
-            tools:text="A filename here" />
-
-    </LinearLayout>
-
-
-    <include
-        android:id="@+id/messageMediaUploadProgressLayout"
-        layout="@layout/media_upload_download_progress_layout"
-        android:layout_width="0dp"
-        android:layout_height="46dp"
-        android:layout_marginStart="64dp"
-        android:layout_marginLeft="64dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="32dp"
-        android:layout_marginRight="32dp"
-        android:layout_marginBottom="8dp"
-        android:visibility="gone"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/messageFileLayout"
-        tools:visibility="visible" />
-
-
-</androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_timeline_event_file_stub.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:id="@+id/messageFileLayout"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        android:layout_marginBottom="8dp"
+        android:duplicateParentState="true"
+        android:orientation="horizontal"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <ImageView
+            android:id="@+id/messageFilee2eIcon"
+            android:layout_width="14dp"
+            android:layout_height="14dp"
+            android:src="@drawable/e2e_verified"
+            android:visibility="gone" />
+
+        <!-- the media type -->
+        <ImageView
+            android:id="@+id/messageFileImageView"
+            android:layout_width="@dimen/chat_avatar_size"
+            android:layout_height="@dimen/chat_avatar_size"
+            android:layout_marginStart="4dp"
+            android:layout_marginLeft="4dp"
+            android:src="@drawable/filetype_image" />
+
+        <!-- the media -->
+        <TextView
+            android:id="@+id/messageFilenameView"
+            android:layout_width="0dp"
+            android:layout_height="@dimen/chat_avatar_size"
+            android:layout_marginStart="4dp"
+            android:layout_marginLeft="4dp"
+            android:layout_weight="1"
+            android:autoLink="none"
+            android:gravity="center_vertical"
+            tools:text="A filename here" />
+
+    </LinearLayout>
+
+    <include
+        android:id="@+id/messageMediaUploadProgressLayout"
+        layout="@layout/media_upload_download_progress_layout"
+        android:layout_width="0dp"
+        android:layout_height="46dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        android:layout_marginBottom="8dp"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/messageFileLayout"
+        tools:visibility="visible" />
+</androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_timeline_event_image_video_message.xml

@@ -1,117 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-  ~ Copyright 2019 New Vector Ltd
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~ http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
-
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
-    android:paddingLeft="16dp"
-    android:addStatesFromChildren="true"
-    android:paddingRight="16dp">
-
-
-    <ImageView
-        android:id="@+id/messageAvatarImageView"
-        android:layout_width="44dp"
-        android:layout_height="44dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginBottom="8dp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        tools:src="@tools:sample/avatars" />
-
-    <TextView
-        android:id="@+id/messageMemberNameView"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="56dp"
-        android:layout_marginLeft="56dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="8dp"
-        android:layout_marginRight="8dp"
-        android:ellipsize="end"
-        android:maxLines="1"
-        android:textSize="15sp"
-        app:layout_constraintEnd_toStartOf="@+id/messageTimeView"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        tools:text="@tools:sample/full_names" />
-
-
-    <TextView
-        android:id="@+id/messageTimeView"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="8dp"
-        android:layout_marginLeft="8dp"
-        android:textColor="@color/brown_grey"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintTop_toTopOf="@id/messageMemberNameView"
-        tools:text="@tools:sample/date/hhmm" />
-
-    <ImageView
-        android:id="@+id/messageThumbnailView"
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        android:layout_marginStart="64dp"
-        android:layout_marginLeft="64dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="32dp"
-        android:layout_marginRight="32dp"
-        android:foreground="?attr/selectableItemBackground"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/messageMemberNameView"
-        tools:layout_height="300dp"
-        tools:srcCompat="@tools:sample/backgrounds/scenic" />
-
-    <ImageView
-        android:id="@+id/messageMediaPlayView"
-        android:layout_width="40dp"
-        android:layout_height="40dp"
-        android:src="@drawable/ic_material_play_circle"
-        android:visibility="gone"
-        app:layout_constraintBottom_toBottomOf="@id/messageThumbnailView"
-        app:layout_constraintEnd_toEndOf="@id/messageThumbnailView"
-        app:layout_constraintStart_toStartOf="@id/messageThumbnailView"
-        app:layout_constraintTop_toTopOf="@id/messageThumbnailView"
-        tools:visibility="visible" />
-
-
-    <include
-        android:id="@+id/messageMediaUploadProgressLayout"
-        layout="@layout/media_upload_download_progress_layout"
-        android:layout_width="0dp"
-        android:layout_height="46dp"
-        android:layout_marginStart="64dp"
-        android:layout_marginLeft="64dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="32dp"
-        android:layout_marginRight="32dp"
-        android:layout_marginBottom="8dp"
-        android:visibility="gone"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/messageThumbnailView"
-        tools:visibility="visible" />
-
-
-</androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_timeline_event_media_message_stub.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <ImageView
+        android:id="@+id/messageThumbnailView"
+        android:layout_width="375dp"
+        android:layout_height="0dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:layout_height="300dp" />
+
+    <ImageView
+        android:id="@+id/messageMediaPlayView"
+        android:layout_width="40dp"
+        android:layout_height="40dp"
+        android:src="@drawable/ic_material_play_circle"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="@id/messageThumbnailView"
+        app:layout_constraintEnd_toEndOf="@id/messageThumbnailView"
+        app:layout_constraintStart_toStartOf="@id/messageThumbnailView"
+        app:layout_constraintTop_toTopOf="@id/messageThumbnailView"
+        tools:visibility="visible" />
+
+
+    <include
+        android:id="@+id/messageMediaUploadProgressLayout"
+        layout="@layout/media_upload_download_progress_layout"
+        android:layout_width="0dp"
+        android:layout_height="46dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        android:layout_marginBottom="8dp"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/messageThumbnailView"
+        tools:visibility="visible" />
+</androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_timeline_event_merged_header_stub.xml

@@ -3,8 +3,6 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:paddingLeft="16dp"
-    android:paddingRight="16dp"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
@@ -13,8 +11,6 @@
         layout="@layout/vector_message_merge_avatar_list"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="64dp"
-        android:layout_marginLeft="64dp"
         android:layout_marginTop="8dp"
         android:layout_marginEnd="16dp"
         android:layout_marginRight="16dp"

vector/src/main/res/layout/item_timeline_event_notice.xml

@@ -1,38 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:paddingLeft="16dp"
-    android:paddingRight="16dp">
-
-    <ImageView
-        android:id="@+id/itemNoticeAvatarView"
-        android:layout_width="24dp"
-        android:layout_height="24dp"
-        android:layout_marginStart="56dp"
-        android:layout_marginLeft="56dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginBottom="8dp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/itemNoticeTextView"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="2dp"
-        android:layout_marginEnd="8dp"
-        android:layout_marginBottom="8dp"
-        android:textColor="@color/slate_grey"
-        android:textSize="14sp"
-        android:textStyle="italic"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toEndOf="@+id/itemNoticeAvatarView"
-        app:layout_constraintTop_toTopOf="@+id/itemNoticeAvatarView"
-        tools:text="Mon item" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_timeline_event_notice_stub.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:orientation="horizontal"
+    android:layout_height="wrap_content">
+
+    <ImageView
+        android:id="@+id/itemNoticeAvatarView"
+        android:layout_width="24dp"
+        android:layout_height="24dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:srcCompat="@tools:sample/avatars" />
+
+    <TextView
+        android:layout_gravity="top"
+        android:id="@+id/itemNoticeTextView"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginBottom="8dp"
+        android:textColor="@color/slate_grey"
+        android:textSize="14sp"
+        android:textStyle="italic"
+        tools:text="Jhon doe changed their avatar" />
+
+</LinearLayout>

vector/src/main/res/layout/item_timeline_event_text_message_stub.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/messageTextView"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:textColor="@color/dark_grey"
+    android:textSize="14sp"
+    tools:text="Alright finished work, heading there in about 20 mins…
Ping me when you’re outside" />

vector/src/main/res/values/styles_riot.xml

@@ -246,4 +246,25 @@
         <item name="android:textColorTertiary">@color/riot_tertiary_text_color_status</item>
     </style>
 
+
+    <style name="TimelineContentStubBaseParams">
+        <item name="android:layout_width">0dp</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:layout_marginStart">8dp</item>
+        <item name="android:layout_marginLeft">8dp</item>
+        <item name="android:layout_marginBottom">8dp</item>
+        <item name="android:layout_marginTop">4dp</item>
+        <item name="layout_constraintBottom_toBottomOf">parent</item>
+        <item name="layout_constraintEnd_toEndOf">parent</item>
+        <item name="layout_constraintStart_toEndOf">@id/messageStartGuideline</item>
+    </style>
+
+    <style name="TimelineContentStubNoInfoLayoutParams" parent="TimelineContentStubBaseParams">
+        <item name="layout_constraintTop_toTopOf">parent</item>
+    </style>
+
+
+    <style name="TimelineContentStubLayoutParams" parent="TimelineContentStubBaseParams">
+        <item name="layout_constraintTop_toBottomOf">@id/messageMemberNameView</item>
+    </style>
 </resources>