Merge pull request #2138 from vitorpamplona/claude/optimize-notecompose-layout-xcnm9

Refactor note layout to use custom zero-overhead NoteComposeLayout

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/layouts/NoteComposeLayout.kt

@@ -0,0 +1,393 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.layouts
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.Layout
+import androidx.compose.ui.layout.Placeable
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.Constraints
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.vitorpamplona.amethyst.ui.theme.Size55dp
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
+
+/**
+ * Pre-computed pixel dimensions for [NoteComposeLayout], cached via [remember]
+ * so dp-to-px conversion only runs once per density change.
+ */
+@Immutable
+private data class NoteLayoutPx(
+    /** Author picture column width: 55dp */
+    val authorWidth: Int,
+    /** Horizontal gap between author column and content column: 10dp */
+    val authorContentGap: Int,
+    /** Vertical gap between author picture and relay badges: 5dp */
+    val authorBadgeGap: Int,
+    /** Vertical spacer between header rows and note content: 4dp */
+    val contentSpacer: Int,
+    /** Left padding for the content area: 12dp */
+    val padStart: Int,
+    /** Right padding for the content area: 12dp */
+    val padEnd: Int,
+    /** Top padding for the content area: 10dp */
+    val padTop: Int,
+)
+
+@Composable
+@Preview
+private fun NoteComposeLayoutPreview() {
+    ThemeComparisonColumn {
+        NoteComposeLayoutPreviewCard()
+    }
+}
+
+@Composable
+private fun NoteComposeLayoutPreviewCard() {
+    NoteComposeLayout(
+        modifier = Modifier.fillMaxWidth().background(MaterialTheme.colorScheme.surface),
+        showSecondRow = true,
+        authorPicture = {
+            Box(
+                Modifier
+                    .size(55.dp)
+                    .clip(CircleShape)
+                    .background(Color(0xFF9575CD)),
+            )
+        },
+        relayBadges = {
+            Text("R1  R2  R3", fontSize = 10.sp, color = Color.Gray)
+        },
+        firstRow = {
+            Text(
+                "Alice  @alice  2h  ...",
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+            )
+        },
+        secondRow = {
+            Text(
+                "alice@nostr.com",
+                fontSize = 12.sp,
+                color = Color.Gray,
+                maxLines = 1,
+            )
+        },
+        noteContent = {
+            Text(
+                "This is a sample note content that demonstrates the custom " +
+                    "NoteComposeLayout with all slots populated. The layout handles " +
+                    "author picture, relay badges, header rows, content, and reactions.",
+            )
+        },
+        reactionsRow = {
+            Text("  Reply 3     Boost 5     Like 12     Zap 1.2k", fontSize = 12.sp, color = Color.Gray)
+        },
+    )
+}
+
+@Composable
+@Preview
+private fun NoteComposeLayoutBoostedPreview() {
+    ThemeComparisonColumn {
+        NoteComposeLayout(
+            modifier = Modifier.fillMaxWidth().background(MaterialTheme.colorScheme.surface),
+            addPadding = false,
+            showAuthorColumn = false,
+            authorPicture = {},
+            relayBadges = {},
+            firstRow = {
+                Text("Bob boosted  2h  ...")
+            },
+            secondRow = {},
+            noteContent = {
+                Text("Boosted note content without author column or padding.")
+            },
+            reactionsRow = {
+                Text("  Reply     Boost     Like     Zap", fontSize = 12.sp, color = Color.Gray)
+            },
+        )
+    }
+}
+
+/**
+ * Custom single-pass layout for note feed items that replaces the nested
+ * Row/Column structure with direct constraint calculation using known fixed
+ * dimensions.
+ *
+ * ## Layout structure
+ *
+ * When [showAuthorColumn] is true (normal notes):
+ * ```
+ * ┌──────────────────────────────────────────────┐
+ * │ padding (start=12, end=12, top=10)           │
+ * │ ┌──────┐ 10dp ┌────────────────────────────┐ │
+ * │ │author│  gap  │ firstRow                   │ │
+ * │ │ 55dp │       │ secondRow (optional)       │ │
+ * │ │      │       │ 4dp spacer (optional)      │ │
+ * │ ├──────┤ 5dp   │ noteContent                │ │
+ * │ │relay │  gap  │                            │ │
+ * │ │badges│       │                            │ │
+ * │ └──────┘       └────────────────────────────┘ │
+ * ├───────────────────────────────────────────────┤
+ * │ reactionsRow (full width, no side padding)    │
+ * └───────────────────────────────────────────────┘
+ * ```
+ *
+ * When [showAuthorColumn] is false (boosted/quoted notes):
+ * ```
+ * ┌───────────────────────────────────────────────┐
+ * │ firstRow (full width)                         │
+ * │ noteContent                                   │
+ * ├───────────────────────────────────────────────┤
+ * │ reactionsRow (full width)                     │
+ * └───────────────────────────────────────────────┘
+ * ```
+ *
+ * ## Design choices
+ *
+ * **Multi-content Layout instead of layoutId**: Uses [Layout] with `contents: List`
+ * so each slot's composables become direct measurables without Box/Column wrappers.
+ * This eliminates 6 intermediate layout nodes per note compared to the layoutId
+ * approach. Empty slot lambdas produce empty measurable lists, which are skipped
+ * entirely (no [Constraints.fixed] zero-size measurement needed).
+ *
+ * **Padding in measure policy instead of Modifier.padding()**: The reactions row
+ * spans the full parent width without side padding, while the author + content area
+ * has 12dp horizontal padding. A single Modifier.padding() can't express different
+ * padding for different children, so padding offsets are applied during placement.
+ *
+ * **placeRelative instead of place**: Ensures correct positioning in RTL layouts
+ * by automatically mirroring x coordinates.
+ *
+ * **arrayOfNulls instead of map**: For multi-child slots (noteContent, reactionsRow),
+ * uses pre-sized arrays with indexed iteration to avoid List allocation overhead in
+ * the measure pass hot path.
+ *
+ * ## Slot ordering contract
+ *
+ * The `contents` list and `allMeasurables` indices are:
+ * - 0: [authorPicture] - 0 or 1 measurables
+ * - 1: [relayBadges] - 0 or 1 measurables
+ * - 2: [firstRow] - exactly 1 measurable
+ * - 3: [secondRow] - 0 or 1 measurables
+ * - 4: [noteContent] - 1+ measurables (stacked vertically)
+ * - 5: [reactionsRow] - 0+ measurables (stacked vertically)
+ *
+ * ## Performance
+ *
+ * Compared to the previous nested Row > Column > Column structure:
+ * - Eliminates 3 layout node levels (Row, author Column, content Column)
+ * - Eliminates Row's two-pass measurement (measure author first, then content)
+ * - Pre-computes all pixel dimensions once via [remember], cached across recompositions
+ * - Remaining per-frame allocations: ~48 bytes for `listOf(6 lambdas)` +
+ *   ~24 bytes per `arrayOfNulls` for multi-child slots
+ *
+ * The caller should use `drawBehind { drawRect(color) }` instead of
+ * `background(color)` on the [modifier] to avoid recomposition when the
+ * background color state changes (e.g. "new item" highlight fade).
+ *
+ * @param modifier Applied to the Layout root. Typically includes combinedClickable
+ *   for note navigation, drawBehind for background color, and fillMaxWidth.
+ * @param addPadding Whether to add standard note padding (12dp sides, 10dp top)
+ *   to the author + content area. False for boosted notes.
+ * @param showAuthorColumn Whether to reserve 55dp for the author picture column
+ *   with a 10dp gap. False for boosted/quoted notes.
+ * @param showSecondRow Whether to measure and place the second header row
+ *   (NIP-05 status, location, PoW). Requires complete UI mode.
+ * @param showContentSpacer Whether to add a 4dp spacer between header rows and
+ *   note content. False for repost events.
+ * @param authorPicture Slot for the author's profile picture (55x55dp area).
+ *   Should emit nothing when [showAuthorColumn] is false to skip composition.
+ * @param relayBadges Slot for relay indicator icons below the author picture.
+ *   Should emit nothing when [showAuthorColumn] is false.
+ * @param firstRow Slot for the primary header: author name, time, more options.
+ *   Always present.
+ * @param secondRow Slot for the secondary header: NIP-05, location, PoW, OTS.
+ *   Should emit nothing when [showSecondRow] is false.
+ * @param noteContent Slot for the event-specific content. May emit multiple
+ *   children (content + zap splits + approval button) which are stacked vertically.
+ * @param reactionsRow Slot for the reaction buttons row. May emit a ReactionsRow,
+ *   a Spacer, or nothing depending on event type.
+ */
+@Composable
+fun NoteComposeLayout(
+    modifier: Modifier = Modifier,
+    addPadding: Boolean = true,
+    showAuthorColumn: Boolean = true,
+    showSecondRow: Boolean = false,
+    showContentSpacer: Boolean = true,
+    authorPicture: @Composable () -> Unit,
+    relayBadges: @Composable () -> Unit,
+    firstRow: @Composable () -> Unit,
+    secondRow: @Composable () -> Unit,
+    noteContent: @Composable () -> Unit,
+    reactionsRow: @Composable () -> Unit,
+) {
+    val density = LocalDensity.current
+    val px =
+        remember(density) {
+            with(density) {
+                NoteLayoutPx(
+                    authorWidth = Size55dp.roundToPx(),
+                    authorContentGap = 10.dp.roundToPx(),
+                    authorBadgeGap = 5.dp.roundToPx(),
+                    contentSpacer = 4.dp.roundToPx(),
+                    padStart = 12.dp.roundToPx(),
+                    padEnd = 12.dp.roundToPx(),
+                    padTop = 10.dp.roundToPx(),
+                )
+            }
+        }
+
+    // Slot order must match the indices used in the measure policy below.
+    Layout(
+        contents =
+            listOf(
+                authorPicture, // 0
+                relayBadges, // 1
+                firstRow, // 2
+                secondRow, // 3
+                noteContent, // 4
+                reactionsRow, // 5
+            ),
+        modifier = modifier,
+    ) { allMeasurables, constraints ->
+        val maxWidth = constraints.maxWidth
+
+        // Padding is applied in the measure policy (not via Modifier.padding) because
+        // the reactions row needs full width while the content area is inset.
+        val padStart = if (addPadding) px.padStart else 0
+        val padEnd = if (addPadding) px.padEnd else 0
+        val padTop = if (addPadding) px.padTop else 0
+
+        // Column widths are computed from known fixed dimensions, eliminating
+        // the Row's two-pass measurement (measure author → compute remaining → measure content).
+        val innerWidth = maxWidth - padStart - padEnd
+        val authorW = if (showAuthorColumn) px.authorWidth else 0
+        val gap = if (showAuthorColumn) px.authorContentGap else 0
+        val contentWidth = (innerWidth - authorW - gap).coerceAtLeast(0)
+
+        // Constraints is a value class (inline Long) so these don't allocate.
+        val authorConstraints = Constraints(maxWidth = px.authorWidth)
+        val contentConstraints = Constraints(maxWidth = contentWidth)
+        val fullWidthConstraints = Constraints(maxWidth = maxWidth)
+
+        // Single-child slots: firstOrNull() returns null for empty slots (hidden),
+        // skipping measurement entirely.
+        val authorPlaceable = allMeasurables[0].firstOrNull()?.measure(authorConstraints)
+        val relayPlaceable = allMeasurables[1].firstOrNull()?.measure(authorConstraints)
+
+        val firstRowPlaceable = allMeasurables[2].firstOrNull()?.measure(contentConstraints)
+        val secondRowPlaceable =
+            if (showSecondRow) allMeasurables[3].firstOrNull()?.measure(contentConstraints) else null
+
+        // Multi-child slots: measured into pre-sized arrays to avoid List allocation.
+        val contentMeasurables = allMeasurables[4]
+        val contentPlaceables = arrayOfNulls<Placeable>(contentMeasurables.size)
+        var contentStackHeight = 0
+        for (i in contentMeasurables.indices) {
+            val placeable = contentMeasurables[i].measure(contentConstraints)
+            contentPlaceables[i] = placeable
+            contentStackHeight += placeable.height
+        }
+
+        val reactionsMeasurables = allMeasurables[5]
+        val reactionsPlaceables = arrayOfNulls<Placeable>(reactionsMeasurables.size)
+        var reactionsHeight = 0
+        for (i in reactionsMeasurables.indices) {
+            val placeable = reactionsMeasurables[i].measure(fullWidthConstraints)
+            reactionsPlaceables[i] = placeable
+            reactionsHeight += placeable.height
+        }
+
+        // Height calculation
+        val spacer = if (showContentSpacer) px.contentSpacer else 0
+
+        val contentColumnHeight =
+            (firstRowPlaceable?.height ?: 0) +
+                (secondRowPlaceable?.height ?: 0) +
+                spacer +
+                contentStackHeight
+
+        val authorColumnHeight =
+            if (showAuthorColumn && authorPlaceable != null) {
+                authorPlaceable.height + px.authorBadgeGap + (relayPlaceable?.height ?: 0)
+            } else {
+                0
+            }
+
+        val mainAreaHeight = maxOf(authorColumnHeight, contentColumnHeight)
+        val totalHeight = padTop + mainAreaHeight + reactionsHeight
+
+        // placeRelative handles RTL by mirroring x coordinates automatically.
+        layout(maxWidth, totalHeight.coerceAtLeast(constraints.minHeight)) {
+            // Author column (inside padding area)
+            if (showAuthorColumn) {
+                authorPlaceable?.placeRelative(padStart, padTop)
+                relayPlaceable?.placeRelative(
+                    padStart,
+                    padTop + (authorPlaceable?.height ?: 0) + px.authorBadgeGap,
+                )
+            }
+
+            // Content column (to the right of author, inside padding area)
+            val contentX = padStart + authorW + gap
+            var y = padTop
+
+            firstRowPlaceable?.placeRelative(contentX, y)
+            y += firstRowPlaceable?.height ?: 0
+
+            if (showSecondRow) {
+                secondRowPlaceable?.placeRelative(contentX, y)
+                y += secondRowPlaceable?.height ?: 0
+            }
+
+            y += spacer
+
+            for (placeable in contentPlaceables) {
+                placeable?.placeRelative(contentX, y)
+                y += placeable?.height ?: 0
+            }
+
+            // Reactions row (full width, no side padding, below main area)
+            var reactionsY = padTop + mainAreaHeight
+            for (placeable in reactionsPlaceables) {
+                placeable?.placeRelative(0, reactionsY)
+                reactionsY += placeable?.height ?: 0
+            }
+        }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -51,6 +51,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Alignment.Companion.CenterVertically
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawBehind
 import androidx.compose.ui.graphics.Brush
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.compositeOver
@@ -70,6 +71,7 @@ import com.vitorpamplona.amethyst.service.relayClient.reqCommand.event.observeNo
 import com.vitorpamplona.amethyst.ui.components.GenericLoadable
 import com.vitorpamplona.amethyst.ui.components.RobohashFallbackAsyncImage
 import com.vitorpamplona.amethyst.ui.layouts.GenericRepostLayout
+import com.vitorpamplona.amethyst.ui.layouts.NoteComposeLayout
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.navigation.routes.routeEditDraftTo
 import com.vitorpamplona.amethyst.ui.navigation.routes.routeFor
@@ -178,8 +180,6 @@ import com.vitorpamplona.amethyst.ui.theme.HalfDoubleVertSpacer
 import com.vitorpamplona.amethyst.ui.theme.HalfPadding
 import com.vitorpamplona.amethyst.ui.theme.HalfStartPadding
 import com.vitorpamplona.amethyst.ui.theme.Height4dpModifier
-import com.vitorpamplona.amethyst.ui.theme.RowColSpacing10dp
-import com.vitorpamplona.amethyst.ui.theme.RowColSpacing5dp
 import com.vitorpamplona.amethyst.ui.theme.Size10dp
 import com.vitorpamplona.amethyst.ui.theme.Size25dp
 import com.vitorpamplona.amethyst.ui.theme.Size30dp
@@ -189,12 +189,9 @@ import com.vitorpamplona.amethyst.ui.theme.Size55dp
 import com.vitorpamplona.amethyst.ui.theme.StdHorzSpacer
 import com.vitorpamplona.amethyst.ui.theme.UserNameMaxRowHeight
 import com.vitorpamplona.amethyst.ui.theme.UserNameRowHeight
-import com.vitorpamplona.amethyst.ui.theme.WidthAuthorPictureModifier
-import com.vitorpamplona.amethyst.ui.theme.boostedNoteModifier
 import com.vitorpamplona.amethyst.ui.theme.channelNotePictureModifier
 import com.vitorpamplona.amethyst.ui.theme.grayText
 import com.vitorpamplona.amethyst.ui.theme.newItemBackgroundColor
-import com.vitorpamplona.amethyst.ui.theme.normalWithTopMarginNoteModifier
 import com.vitorpamplona.amethyst.ui.theme.placeholderText
 import com.vitorpamplona.amethyst.ui.theme.replyModifier
 import com.vitorpamplona.quartz.experimental.attestations.attestation.AttestationEvent
@@ -550,33 +547,74 @@ private fun CheckNewAndRenderNote(
             accountViewModel,
         )
 
-    ClickableNote(
+    InnerNoteWithReactions(
         baseNote = baseNote,
         backgroundColor = backgroundColor,
-        modifier = modifier,
+        clickModifier = clickableNoteModifier(baseNote, modifier, accountViewModel, showPopup, nav),
+        isBoostedNote = isBoostedNote,
+        isQuotedNote = isQuotedNote,
+        unPackReply = unPackReply,
+        makeItShort = makeItShort,
+        canPreview = canPreview,
+        isPinned = isPinned,
+        quotesLeft = quotesLeft,
         accountViewModel = accountViewModel,
-        showPopup = showPopup,
         nav = nav,
-    ) {
+        moreOptions = moreOptions,
-        InnerNoteWithReactions(
+    )
-            baseNote = baseNote,
-            backgroundColor = backgroundColor,
-            isBoostedNote = isBoostedNote,
-            isQuotedNote = isQuotedNote,
-            unPackReply = unPackReply,
-            makeItShort = makeItShort,
-            canPreview = canPreview,
-            isPinned = isPinned,
-            quotesLeft = quotesLeft,
-            accountViewModel = accountViewModel,
-            nav = nav,
-            moreOptions = moreOptions,
-        )
-    }
 }
 
+/**
+ * Creates a [Modifier] with [combinedClickable] for note navigation (click to open,
+ * long-press for quick action popup). Remembered by [baseNote] and [modifier] to avoid
+ * recreating the click handler on every recomposition.
+ *
+ * Used directly on [NoteComposeLayout]'s modifier in [InnerNoteWithReactions] to avoid
+ * a wrapping Column node. For callers that need a wrapping container, use [ClickableNote].
+ */
 @Composable
 @OptIn(ExperimentalFoundationApi::class)
+fun clickableNoteModifier(
+    baseNote: Note,
+    modifier: Modifier,
+    accountViewModel: AccountViewModel,
+    showPopup: () -> Unit,
+    nav: INav,
+): Modifier =
+    remember(baseNote, modifier) {
+        modifier
+            .combinedClickable(
+                onClick = {
+                    val redirectToNote =
+                        if (baseNote.event is RepostEvent || baseNote.event is GenericRepostEvent) {
+                            baseNote.replyTo?.lastOrNull() ?: baseNote
+                        } else {
+                            baseNote
+                        }
+
+                    nav.nav {
+                        if (redirectToNote.event is DraftWrapEvent) {
+                            withContext(Dispatchers.IO) {
+                                routeEditDraftTo(redirectToNote, accountViewModel.account)
+                            }
+                        } else {
+                            routeFor(redirectToNote, accountViewModel.account)
+                        }
+                    }
+                },
+                onLongClick = showPopup,
+            )
+    }
+
+/**
+ * Wraps [content] in a Column with click handling and animated background.
+ *
+ * Kept for callers outside NoteCompose (e.g. ChannelCardCompose) that need a
+ * container for non-NoteComposeLayout content. For NoteCompose itself,
+ * [InnerNoteWithReactions] applies [clickableNoteModifier] directly on the
+ * [NoteComposeLayout] modifier to eliminate this Column wrapper node.
+ */
+@Composable
 fun ClickableNote(
     baseNote: Note,
     modifier: Modifier,
@@ -586,39 +624,20 @@ fun ClickableNote(
     nav: INav,
     content: @Composable () -> Unit,
 ) {
-    val updatedModifier =
+    Column(
-        remember(baseNote, modifier) {
+        modifier =
-            modifier
+            clickableNoteModifier(baseNote, modifier, accountViewModel, showPopup, nav)
-                .combinedClickable(
+                .background(backgroundColor.value),
-                    onClick = {
+    ) {
-                        val redirectToNote =
+        content()
-                            if (baseNote.event is RepostEvent || baseNote.event is GenericRepostEvent) {
+    }
-                                baseNote.replyTo?.lastOrNull() ?: baseNote
-                            } else {
-                                baseNote
-                            }
-
-                        nav.nav {
-                            if (redirectToNote.event is DraftWrapEvent) {
-                                withContext(Dispatchers.IO) {
-                                    routeEditDraftTo(redirectToNote, accountViewModel.account)
-                                }
-                            } else {
-                                routeFor(redirectToNote, accountViewModel.account)
-                            }
-                        }
-                    },
-                    onLongClick = showPopup,
-                )
-        }
-
-    Column(modifier = updatedModifier.background(backgroundColor.value)) { content() }
 }
 
 @Composable
 fun InnerNoteWithReactions(
     baseNote: Note,
     backgroundColor: MutableState<Color>,
+    clickModifier: Modifier = Modifier,
     isBoostedNote: Boolean,
     isQuotedNote: Boolean,
     unPackReply: ReplyRenderType,
@@ -632,74 +651,94 @@ fun InnerNoteWithReactions(
 ) {
     val notBoostedNorQuote = !isBoostedNote && !isQuotedNote
     val editState = observeEdits(baseNote = baseNote, accountViewModel = accountViewModel)
+    val isNotRepost = baseNote.event !is RepostEvent && baseNote.event !is GenericRepostEvent
+    val showSecondRow = isNotRepost && notBoostedNorQuote && accountViewModel.settings.isCompleteUIMode()
 
-    Row(
+    NoteComposeLayout(
         modifier =
-            if (!isBoostedNote) {
+            clickModifier
-                normalWithTopMarginNoteModifier
+                .drawBehind { drawRect(backgroundColor.value) }
-            } else {
+                .fillMaxWidth(),
-                boostedNoteModifier
+        addPadding = !isBoostedNote,
-            },
+        showAuthorColumn = notBoostedNorQuote,
-        horizontalArrangement = RowColSpacing10dp,
+        showSecondRow = showSecondRow,
-    ) {
+        showContentSpacer = isNotRepost,
-        if (notBoostedNorQuote) {
+        authorPicture = {
-            Column(WidthAuthorPictureModifier, verticalArrangement = RowColSpacing5dp) {
+            if (notBoostedNorQuote) {
-                // Draws the boosted picture outside the boosted card.
                 Box(modifier = Size55Modifier, contentAlignment = Alignment.BottomEnd) {
                     RenderAuthorImages(baseNote, nav, accountViewModel)
                 }
-
+            }
+        },
+        relayBadges = {
+            if (notBoostedNorQuote) {
                 BadgeBox(baseNote, accountViewModel, nav)
             }
-        }
+        },
-
+        firstRow = {
-        Column(Modifier.fillMaxWidth()) {
+            FirstUserInfoRow(
-            val showSecondRow =
-                baseNote.event !is RepostEvent &&
-                    baseNote.event !is GenericRepostEvent &&
-                    !isBoostedNote &&
-                    !isQuotedNote &&
-                    accountViewModel.settings.isCompleteUIMode()
-            NoteBody(
                 baseNote = baseNote,
                 showAuthorPicture = isQuotedNote,
-                unPackReply = unPackReply,
-                makeItShort = makeItShort,
-                canPreview = canPreview,
-                showSecondRow = showSecondRow,
                 isPinned = isPinned,
-                quotesLeft = quotesLeft,
-                backgroundColor = backgroundColor,
                 editState = editState,
                 accountViewModel = accountViewModel,
                 nav = nav,
                 moreOptions = moreOptions,
             )
-
+        },
-            RenderApprovalIfNeeded(baseNote, accountViewModel, nav)
+        secondRow = {
-        }
+            if (showSecondRow) {
-    }
+                SecondUserInfoRow(
-
+                    baseNote,
-    val isNotRepost = baseNote.event !is RepostEvent && baseNote.event !is GenericRepostEvent && baseNote.event !is DraftWrapEvent
+                    editState,
-
+                    accountViewModel,
-    if (isNotRepost) {
+                    nav,
-        if (makeItShort) {
+                )
-            Spacer(modifier = DoubleVertSpacer)
+            }
-        } else {
+        },
-            ReactionsRow(
+        noteContent = {
+            RenderNoteRow(
                 baseNote = baseNote,
-                showReactionDetail = notBoostedNorQuote,
+                backgroundColor = backgroundColor,
-                addPadding = !isBoostedNote,
+                makeItShort = makeItShort,
+                canPreview = canPreview,
                 editState = editState,
+                quotesLeft = quotesLeft,
+                unPackReply = unPackReply,
                 accountViewModel = accountViewModel,
                 nav = nav,
             )
-        }
+
-    } else {
+            if (!makeItShort) {
-        if (baseNote.event is DraftWrapEvent) {
+                val noteEvent = baseNote.event
-            Spacer(modifier = DoubleVertSpacer)
+                val zapSplits = remember(noteEvent) { noteEvent?.hasZapSplitSetup() ?: false }
-        }
+                if (zapSplits && noteEvent != null) {
-    }
+                    Spacer(modifier = HalfDoubleVertSpacer)
+                    DisplayZapSplits(noteEvent, false, accountViewModel, nav)
+                }
+            }
+
+            RenderApprovalIfNeeded(baseNote, accountViewModel, nav)
+        },
+        reactionsRow = {
+            if (isNotRepost && baseNote.event !is DraftWrapEvent) {
+                if (makeItShort) {
+                    Spacer(modifier = DoubleVertSpacer)
+                } else {
+                    ReactionsRow(
+                        baseNote = baseNote,
+                        showReactionDetail = notBoostedNorQuote,
+                        addPadding = !isBoostedNote,
+                        editState = editState,
+                        accountViewModel = accountViewModel,
+                        nav = nav,
+                    )
+                }
+            } else if (baseNote.event is DraftWrapEvent) {
+                Spacer(modifier = DoubleVertSpacer)
+            }
+        },
+    )
 }
 
 @Composable