Add preview for MessageEventBubble.

features/messages/src/main/kotlin/io/element/android/features/messages/timeline/TimelineView.kt

@@ -54,6 +54,7 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.zIndex
+import io.element.android.features.messages.timeline.components.BubbleState
 import io.element.android.features.messages.timeline.components.MessageEventBubble
 import io.element.android.features.messages.timeline.components.TimelineItemEncryptedView
 import io.element.android.features.messages.timeline.components.TimelineItemImageView
@@ -62,8 +63,8 @@ import io.element.android.features.messages.timeline.components.TimelineItemReda
 import io.element.android.features.messages.timeline.components.TimelineItemTextView
 import io.element.android.features.messages.timeline.components.TimelineItemUnknownView
 import io.element.android.features.messages.timeline.model.TimelineItem
-import io.element.android.features.messages.timeline.model.content.TimelineItemContentProvider
 import io.element.android.features.messages.timeline.model.content.TimelineItemContent
+import io.element.android.features.messages.timeline.model.content.TimelineItemContentProvider
 import io.element.android.features.messages.timeline.model.content.TimelineItemEncryptedContent
 import io.element.android.features.messages.timeline.model.content.TimelineItemImageContent
 import io.element.android.features.messages.timeline.model.content.TimelineItemRedactedContent
@@ -193,10 +194,12 @@ fun MessageEventRow(
                     )
                 }
                 MessageEventBubble(
-                    groupPosition = messageEvent.groupPosition,
-                    isMine = messageEvent.isMine,
+                    state = BubbleState(
+                        groupPosition = messageEvent.groupPosition,
+                        isMine = messageEvent.isMine,
+                        isHighlighted = isHighlighted,
+                    ),
                     interactionSource = interactionSource,
-                    isHighlighted = isHighlighted,
                     onClick = onClick,
                     onLongClick = onLongClick,
                     modifier = Modifier

features/messages/src/main/kotlin/io/element/android/features/messages/timeline/components/BubbleState.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2023 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 io.element.android.features.messages.timeline.components
+
+import androidx.compose.runtime.Stable
+import io.element.android.features.messages.timeline.model.MessagesItemGroupPosition
+
+@Stable
+data class BubbleState(
+    val groupPosition: MessagesItemGroupPosition,
+    val isMine: Boolean,
+    val isHighlighted: Boolean,
+)

features/messages/src/main/kotlin/io/element/android/features/messages/timeline/components/BubbleStateProvider.kt

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2023 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 io.element.android.features.messages.timeline.components
+
+import androidx.compose.ui.tooling.preview.PreviewParameterProvider
+import io.element.android.features.messages.timeline.model.MessagesItemGroupPosition
+
+open class BubbleStateProvider : PreviewParameterProvider<BubbleState> {
+    override val values: Sequence<BubbleState>
+        get() = sequenceOf(
+            BubbleState(MessagesItemGroupPosition.First, isMine = false, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.First, isMine = false, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.First, isMine = false, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.First, isMine = false, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.First, isMine = true, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.First, isMine = true, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.First, isMine = true, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.First, isMine = true, isHighlighted = true),
+
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = false, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = false, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = false, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = false, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = true, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = true, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = true, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Middle, isMine = true, isHighlighted = true),
+
+            BubbleState(MessagesItemGroupPosition.Last, isMine = false, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Last, isMine = false, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.Last, isMine = false, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Last, isMine = false, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.Last, isMine = true, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Last, isMine = true, isHighlighted = true),
+            BubbleState(MessagesItemGroupPosition.Last, isMine = true, isHighlighted = false),
+            BubbleState(MessagesItemGroupPosition.Last, isMine = true, isHighlighted = true),
+        )
+}
+
+fun aBubbleState() = BubbleState(
+    groupPosition = MessagesItemGroupPosition.First,
+    isMine = false,
+    isHighlighted = false,
+)

features/messages/src/main/kotlin/io/element/android/features/messages/timeline/components/MessageEventBubble.kt

@@ -19,16 +19,25 @@ package io.element.android.features.messages.timeline.components
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.ripple.rememberRipple
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Shape
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.dp
 import io.element.android.features.messages.timeline.model.MessagesItemGroupPosition
+import io.element.android.libraries.designsystem.preview.ElementPreviewDark
+import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.designsystem.theme.ElementTheme
 import io.element.android.libraries.designsystem.theme.components.Surface
 
@@ -37,28 +46,26 @@ private val BUBBLE_RADIUS = 16.dp
 @OptIn(ExperimentalFoundationApi::class)
 @Composable
 fun MessageEventBubble(
-    groupPosition: MessagesItemGroupPosition,
-    isMine: Boolean,
+    state: BubbleState,
     interactionSource: MutableInteractionSource,
-    isHighlighted: Boolean,
     modifier: Modifier = Modifier,
     onClick: () -> Unit = {},
     onLongClick: () -> Unit = {},
     content: @Composable () -> Unit = {},
 ) {
     fun bubbleShape(): Shape {
-        return when (groupPosition) {
-            MessagesItemGroupPosition.First -> if (isMine) {
+        return when (state.groupPosition) {
+            MessagesItemGroupPosition.First -> if (state.isMine) {
                 RoundedCornerShape(BUBBLE_RADIUS, BUBBLE_RADIUS, 0.dp, BUBBLE_RADIUS)
             } else {
                 RoundedCornerShape(BUBBLE_RADIUS, BUBBLE_RADIUS, BUBBLE_RADIUS, 0.dp)
             }
-            MessagesItemGroupPosition.Middle -> if (isMine) {
+            MessagesItemGroupPosition.Middle -> if (state.isMine) {
                 RoundedCornerShape(BUBBLE_RADIUS, 0.dp, 0.dp, BUBBLE_RADIUS)
             } else {
                 RoundedCornerShape(0.dp, BUBBLE_RADIUS, BUBBLE_RADIUS, 0.dp)
             }
-            MessagesItemGroupPosition.Last -> if (isMine) {
+            MessagesItemGroupPosition.Last -> if (state.isMine) {
                 RoundedCornerShape(BUBBLE_RADIUS, 0.dp, BUBBLE_RADIUS, BUBBLE_RADIUS)
             } else {
                 RoundedCornerShape(0.dp, BUBBLE_RADIUS, BUBBLE_RADIUS, BUBBLE_RADIUS)
@@ -74,17 +81,17 @@ fun MessageEventBubble(
     }
 
     fun Modifier.offsetForItem(): Modifier {
-        return if (isMine) {
+        return if (state.isMine) {
             offset(y = -(12.dp))
         } else {
             offset(x = 20.dp, y = -(12.dp))
         }
     }
 
-    val backgroundBubbleColor = if (isHighlighted) {
+    val backgroundBubbleColor = if (state.isHighlighted) {
         ElementTheme.colors.messageHighlightedBackground
     } else {
-        if (isMine) {
+        if (state.isMine) {
             ElementTheme.colors.messageFromMeBackground
         } else {
             ElementTheme.colors.messageFromOtherBackground
@@ -107,3 +114,31 @@ fun MessageEventBubble(
         content = content
     )
 }
+
+@Preview
+@Composable
+internal fun MessageEventBubbleLightPreview(@PreviewParameter(BubbleStateProvider::class) state: BubbleState) =
+    ElementPreviewLight { ContentToPreview(state) }
+
+@Preview
+@Composable
+internal fun MessageEventBubbleDarkPreview(@PreviewParameter(BubbleStateProvider::class) state: BubbleState) =
+    ElementPreviewDark { ContentToPreview(state) }
+
+@Composable
+private fun ContentToPreview(state: BubbleState) {
+    // Due to y offset, surround with a Box
+    Box(
+        modifier = Modifier
+            .size(width = 240.dp, height = 64.dp)
+            .padding(8.dp),
+        contentAlignment = Alignment.CenterStart,
+    ) {
+        MessageEventBubble(
+            state = state,
+            interactionSource = MutableInteractionSource(),
+        ) {
+            Spacer(modifier = Modifier.size(width = 120.dp, height = 32.dp))
+        }
+    }
+}