Merge pull request #826 from vector-im/feature/bma/swipeAction

Improve swipe to reply rendering

.idea/dictionaries/shared.xml

@@ -9,6 +9,7 @@
             <w>placeables</w>
             <w>showkase</w>
             <w>snackbar</w>
+            <w>swipeable</w>
             <w>textfields</w>
         </words>
     </dictionary>

build.gradle.kts

@@ -247,6 +247,7 @@ koverMerged {
                 excludes += "io.element.android.features.messages.impl.media.local.LocalMediaViewState"
                 excludes += "io.element.android.features.location.impl.map.MapState"
                 excludes += "io.element.android.libraries.matrix.api.timeline.item.event.LocalEventSendState*"
+                excludes += "io.element.android.libraries.designsystem.swipe.SwipeableActionsState*"
             }
             bound {
                 minValue = 90

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

@@ -14,13 +14,13 @@
  * limitations under the License.
  */
 
-@file:OptIn(ExperimentalMaterial3Api::class)
-
 package io.element.android.features.messages.impl.timeline.components
 
 import androidx.compose.foundation.Canvas
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.gestures.Orientation
+import androidx.compose.foundation.gestures.draggable
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -28,6 +28,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.absoluteOffset
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
@@ -35,26 +36,25 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.layout.wrapContentHeight
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material3.DismissDirection
-import androidx.compose.material3.DismissState
-import androidx.compose.material3.DismissValue
-import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.SwipeToDismiss
-import androidx.compose.material3.rememberDismissState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.clipToBounds
 import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.platform.LocalViewConfiguration
+import androidx.compose.ui.platform.ViewConfiguration
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.IntOffset
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.zIndex
@@ -66,6 +66,7 @@ import io.element.android.features.messages.impl.timeline.aTimelineItemReactions
 import io.element.android.features.messages.impl.timeline.components.event.TimelineItemEventContentView
 import io.element.android.features.messages.impl.timeline.components.event.toExtraPadding
 import io.element.android.features.messages.impl.timeline.model.TimelineItem
+import io.element.android.features.messages.impl.timeline.model.TimelineItemGroupPosition
 import io.element.android.features.messages.impl.timeline.model.bubble.BubbleState
 import io.element.android.features.messages.impl.timeline.model.event.TimelineItemImageContent
 import io.element.android.features.messages.impl.timeline.model.event.TimelineItemLocationContent
@@ -78,6 +79,9 @@ import io.element.android.libraries.designsystem.components.avatar.Avatar
 import io.element.android.libraries.designsystem.components.avatar.AvatarData
 import io.element.android.libraries.designsystem.preview.ElementPreviewDark
 import io.element.android.libraries.designsystem.preview.ElementPreviewLight
+import io.element.android.libraries.designsystem.swipe.SwipeableActionsState
+import io.element.android.libraries.designsystem.swipe.rememberSwipeableActionsState
+import io.element.android.libraries.designsystem.text.toPx
 import io.element.android.libraries.designsystem.theme.components.Text
 import io.element.android.libraries.matrix.api.core.EventId
 import io.element.android.libraries.matrix.api.core.UserId
@@ -93,7 +97,10 @@ import io.element.android.libraries.matrix.ui.components.AttachmentThumbnailInfo
 import io.element.android.libraries.matrix.ui.components.AttachmentThumbnailType
 import io.element.android.libraries.theme.ElementTheme
 import io.element.android.libraries.ui.strings.CommonStrings
+import kotlinx.coroutines.launch
 import org.jsoup.Jsoup
+import kotlin.math.abs
+import kotlin.math.roundToInt
 
 @Composable
 fun TimelineItemEventRow(
@@ -110,6 +117,7 @@ fun TimelineItemEventRow(
     onSwipeToReply: () -> Unit,
     modifier: Modifier = Modifier
 ) {
+    val coroutineScope = rememberCoroutineScope()
     val interactionSource = remember { MutableInteractionSource() }
 
     fun onUserDataClicked() {
@@ -121,56 +129,88 @@ fun TimelineItemEventRow(
         inReplyToClick(inReplyToEventId)
     }
 
-    if (canReply) {
-        val dismissState = rememberDismissState(
-            confirmValueChange = {
-                if (it == DismissValue.DismissedToEnd) {
-                    onSwipeToReply()
+    Column(modifier = modifier.fillMaxWidth()) {
+        if (event.groupPosition.isNew()) {
+            Spacer(modifier = Modifier.height(16.dp))
+        } else {
+            Spacer(modifier = Modifier.height(2.dp))
+        }
+        if (canReply) {
+            val state: SwipeableActionsState = rememberSwipeableActionsState()
+            val offset = state.offset.value
+            val swipeThresholdPx = 40.dp.toPx()
+            val thresholdCrossed = abs(offset) > swipeThresholdPx
+            SwipeSensitivity(3f) {
+                Box(Modifier.fillMaxWidth()) {
+                    Row(modifier = Modifier.matchParentSize()) {
+                        ReplySwipeIndicator({ offset / 120 })
+                    }
+                    TimelineItemEventRowContent(
+                        modifier = Modifier
+                            .absoluteOffset { IntOffset(x = offset.roundToInt(), y = 0) }
+                            .draggable(
+                                orientation = Orientation.Horizontal,
+                                enabled = !state.isResettingOnRelease,
+                                onDragStopped = {
+                                    coroutineScope.launch {
+                                        if (thresholdCrossed) {
+                                            onSwipeToReply()
+                                        }
+                                        state.resetOffset()
+                                    }
+                                },
+                                state = state.draggableState,
+                            ),
+                        event = event,
+                        isHighlighted = isHighlighted,
+                        interactionSource = interactionSource,
+                        onClick = onClick,
+                        onLongClick = onLongClick,
+                        onTimestampClicked = onTimestampClicked,
+                        inReplyToClicked = ::inReplyToClicked,
+                        onUserDataClicked = ::onUserDataClicked,
+                        onReactionClicked = { emoji -> onReactionClick(emoji, event) },
+                        onMoreReactionsClicked = { onMoreReactionsClick(event) },
+                    )
                 }
-                // Do not dismiss the message, return false!
-                false
-            }
-        )
-        SwipeToDismiss(
-            state = dismissState,
-            background = {
-                ReplySwipeIndicator({ dismissState.toSwipeProgress() })
-            },
-            directions = setOf(DismissDirection.StartToEnd),
-            dismissContent = {
-                TimelineItemEventRowContent(
-                    event = event,
-                    isHighlighted = isHighlighted,
-                    interactionSource = interactionSource,
-                    onClick = onClick,
-                    onLongClick = onLongClick,
-                    onTimestampClicked = onTimestampClicked,
-                    inReplyToClicked = ::inReplyToClicked,
-                    onUserDataClicked = ::onUserDataClicked,
-                    onReactionClicked = { emoji -> onReactionClick(emoji, event) },
-                    onMoreReactionsClicked = { onMoreReactionsClick(event) },
-                )
             }
-        )
-    } else {
-        TimelineItemEventRowContent(
-            event = event,
-            isHighlighted = isHighlighted,
-            interactionSource = interactionSource,
-            onClick = onClick,
-            onLongClick = onLongClick,
-            onTimestampClicked = onTimestampClicked,
-            inReplyToClicked = ::inReplyToClicked,
-            onUserDataClicked = ::onUserDataClicked,
-            onReactionClicked = { emoji -> onReactionClick(emoji, event) },
-            onMoreReactionsClicked = { onMoreReactionsClick(event) },
-        )
+        } else {
+            TimelineItemEventRowContent(
+                event = event,
+                isHighlighted = isHighlighted,
+                interactionSource = interactionSource,
+                onClick = onClick,
+                onLongClick = onLongClick,
+                onTimestampClicked = onTimestampClicked,
+                inReplyToClicked = ::inReplyToClicked,
+                onUserDataClicked = ::onUserDataClicked,
+                onReactionClicked = { emoji -> onReactionClick(emoji, event) },
+                onMoreReactionsClicked = { onMoreReactionsClick(event) },
+            )
+        }
     }
-    // This is assuming that we are in a ColumnScope, but this is OK, for both Preview and real usage.
-    if (event.groupPosition.isNew()) {
-        Spacer(modifier = modifier.height(16.dp))
-    } else {
-        Spacer(modifier = modifier.height(2.dp))
+}
+
+/**
+ * Impact ViewConfiguration.touchSlop by [sensitivityFactor].
+ * Inspired from https://issuetracker.google.com/u/1/issues/269627294.
+ * @param sensitivityFactor the factor to multiply the touchSlop by. The highest value, the more the user will
+ * have to drag to start the drag.
+ * @param content the content to display.
+ */
+@Composable
+fun SwipeSensitivity(
+    sensitivityFactor: Float,
+    content: @Composable () -> Unit,
+) {
+    val current = LocalViewConfiguration.current
+    CompositionLocalProvider(
+        LocalViewConfiguration provides object : ViewConfiguration by current {
+            override val touchSlop: Float
+                get() = current.touchSlop * sensitivityFactor
+        }
+    ) {
+        content()
     }
 }
 
@@ -266,14 +306,6 @@ private fun TimelineItemEventRowContent(
     }
 }
 
-private fun DismissState.toSwipeProgress(): Float {
-    return when (targetValue) {
-        DismissValue.Default -> 0f
-        DismissValue.DismissedToEnd -> progress * 3
-        DismissValue.DismissedToStart -> progress * 3
-    }
-}
-
 @Composable
 private fun MessageSenderInformation(
     sender: String,
@@ -544,6 +576,7 @@ private fun ContentToPreview() {
                         body = "A long text which will be displayed on several lines and" +
                             " hopefully can be manually adjusted to test different behaviors."
                     ),
+                    groupPosition = TimelineItemGroupPosition.First,
                 ),
                 isHighlighted = false,
                 canReply = true,
@@ -562,6 +595,7 @@ private fun ContentToPreview() {
                     content = aTimelineItemImageContent().copy(
                         aspectRatio = 5f
                     ),
+                    groupPosition = TimelineItemGroupPosition.Last,
                 ),
                 isHighlighted = false,
                 canReply = true,
@@ -606,7 +640,8 @@ private fun ContentToPreviewWithReply() {
                         body = "A long text which will be displayed on several lines and" +
                             " hopefully can be manually adjusted to test different behaviors."
                     ),
-                    inReplyTo = aInReplyToReady(replyContent)
+                    inReplyTo = aInReplyToReady(replyContent),
+                    groupPosition = TimelineItemGroupPosition.First,
                 ),
                 isHighlighted = false,
                 canReply = true,
@@ -625,7 +660,8 @@ private fun ContentToPreviewWithReply() {
                     content = aTimelineItemImageContent().copy(
                         aspectRatio = 5f
                     ),
-                    inReplyTo = aInReplyToReady(replyContent)
+                    inReplyTo = aInReplyToReady(replyContent),
+                    groupPosition = TimelineItemGroupPosition.Last,
                 ),
                 isHighlighted = false,
                 canReply = true,
@@ -699,7 +735,6 @@ private fun ContentTimestampToPreview(event: TimelineItem.Event) {
     }
 }
 
-
 @Preview
 @Composable
 internal fun TimelineItemEventRowWithManyReactionsLightPreview() =

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/swipe/SwipeableActionsState.kt

@@ -0,0 +1,75 @@
+/*
+ * 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.libraries.designsystem.swipe
+
+import androidx.compose.animation.core.Animatable
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.MutatePriority
+import androidx.compose.foundation.gestures.DraggableState
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Stable
+import androidx.compose.runtime.State
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+
+/**
+ * Inspired from https://github.com/bmarty/swipe/blob/trunk/swipe/src/main/kotlin/me/saket/swipe/SwipeableActionsState.kt
+ */
+@Composable
+fun rememberSwipeableActionsState(): SwipeableActionsState {
+    return remember { SwipeableActionsState() }
+}
+
+@Stable
+class SwipeableActionsState {
+    /**
+     * The current position (in pixels) of the content.
+     */
+    val offset: State<Float> get() = offsetState
+    private var offsetState = mutableStateOf(0f)
+
+    /**
+     * Whether the content is currently animating to reset its offset after it was swiped.
+     */
+    var isResettingOnRelease: Boolean by mutableStateOf(false)
+        private set
+
+    val draggableState = DraggableState { delta ->
+        val targetOffset = offsetState.value + delta
+        val isAllowed = isResettingOnRelease || targetOffset > 0f
+
+        offsetState.value += if (isAllowed) delta else 0f
+    }
+
+    suspend fun resetOffset() {
+        draggableState.drag(MutatePriority.PreventUserInput) {
+            isResettingOnRelease = true
+            try {
+                Animatable(offsetState.value).animateTo(
+                    targetValue = 0f,
+                    animationSpec = tween(durationMillis = 300),
+                ) {
+                    dragBy(value - offsetState.value)
+                }
+            } finally {
+                isResettingOnRelease = false
+            }
+        }
+    }
+}