Reorganise dockbar code

composeApp/src/commonMain/kotlin/dev/ulfrx/recipe/ui/components/dock/DockBar.kt

@@ -1,78 +1,24 @@
 package dev.ulfrx.recipe.ui.components.dock
 
-import androidx.compose.animation.core.Animatable
-import androidx.compose.animation.core.FastOutSlowInEasing
-import androidx.compose.animation.core.animateFloatAsState
-import androidx.compose.animation.core.tween
-import androidx.compose.foundation.background
-import androidx.compose.foundation.gestures.awaitEachGesture
-import androidx.compose.foundation.gestures.awaitFirstDown
-import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxHeight
-import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.offset
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.text.BasicText
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateMapOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.alpha
-import androidx.compose.ui.draw.scale
-import androidx.compose.ui.input.pointer.PointerInputScope
 import androidx.compose.ui.input.pointer.pointerInput
-import androidx.compose.ui.input.pointer.positionChanged
-import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.layout.onSizeChanged
-import androidx.compose.ui.layout.positionInParent
-import androidx.compose.ui.platform.LocalDensity
-import androidx.compose.ui.semantics.Role
-import androidx.compose.ui.semantics.contentDescription
-import androidx.compose.ui.semantics.onClick
-import androidx.compose.ui.semantics.role
-import androidx.compose.ui.semantics.selected
-import androidx.compose.ui.semantics.semantics
-import androidx.compose.ui.unit.Density
 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.unit.times
-import com.composeunstyled.UnstyledIcon
 import dev.ulfrx.recipe.navigation.DockDestination
 import dev.ulfrx.recipe.ui.components.glass.CircleGlassButton
-import dev.ulfrx.recipe.ui.components.glass.GlassSurface
 import dev.ulfrx.recipe.ui.theme.RecipeTheme
 import org.jetbrains.compose.resources.stringResource
 import recipe.composeapp.generated.resources.Res
 import recipe.composeapp.generated.resources.dock_expand_a11y
-import kotlin.math.roundToInt
-
-private val PressOverlayBleed = 4.dp
-private val PressOverlayVerticalInset = 0.dp
-private val ActiveIndicatorBleed = 4.dp
-private val ActiveIndicatorVerticalInset = 5.dp
-private val ActiveIndicatorEdgeInset = 5.dp
-private val DockTabIconSize = 18.dp
-private val DockTabIconLabelGap = 2.dp
-private const val PressOverlayScale = 1.22f
-private const val DockTabLabelFontSizeSp = 11
-private const val DockTabLabelLineHeightSp = 13
-private const val OverlaySlideDurationMs = 200
-private const val OverlayFadeDurationMs = 120
 
 @Composable
 fun DockBar(
@@ -84,13 +30,11 @@ fun DockBar(
     height: Dp = 56.dp,
 ) {
     if (collapsed) {
-        CircleGlassButton(
-            onClick = { onTabSelect(active) },
-            icon = active.icon,
-            contentDescription = stringResource(Res.string.dock_expand_a11y),
+        DockBarCollapsed(
+            active = active,
+            onTabSelect = onTabSelect,
             modifier = modifier,
-            size = height,
-            iconTint = RecipeTheme.colors.accent,
+            height = height,
         )
     } else {
         DockBarExpanded(
@@ -103,6 +47,23 @@ fun DockBar(
     }
 }
 
+@Composable
+private fun DockBarCollapsed(
+    active: DockDestination,
+    onTabSelect: (DockDestination) -> Unit,
+    modifier: Modifier,
+    height: Dp,
+) {
+    CircleGlassButton(
+        onClick = { onTabSelect(active) },
+        icon = active.icon,
+        contentDescription = stringResource(Res.string.dock_expand_a11y),
+        modifier = modifier,
+        size = height,
+        iconTint = RecipeTheme.colors.accent,
+    )
+}
+
 @Composable
 private fun DockBarExpanded(
     destinations: List<DockDestination>,
@@ -112,7 +73,7 @@ private fun DockBarExpanded(
     height: Dp,
 ) {
     val tabBounds = remember { mutableStateMapOf<Int, TabBounds>() }
-    var pressedX by remember { mutableStateOf<Float?>(null) }
+    var pressState by remember { mutableStateOf<DockPressState>(DockPressState.Idle) }
     var dockWidthPx by remember { mutableStateOf(0f) }
     val activeIndex = destinations.indexOf(active).coerceAtLeast(0)
 
@@ -121,25 +82,33 @@ private fun DockBarExpanded(
             .height(height)
             .onSizeChanged { dockWidthPx = it.width.toFloat() }
             .pointerInput(destinations) {
-                trackDockGesture(
-                    onPressXChange = { pressedX = it },
-                    onCommit = { x ->
-                        floorTabIndex(x, tabBounds)?.let { idx ->
+                trackDockGesture { event ->
+                    when (event) {
+                        is DockPressEvent.Pressing -> {
+                            pressState = DockPressState.Pressing(event.xPx)
+                        }
+                        is DockPressEvent.Released -> {
+                            tabIndexAt(event.xPx, tabBounds)?.let { idx ->
                                 onTabSelect(destinations[idx])
                             }
-                    },
-                )
+                            pressState = DockPressState.Idle
+                        }
+                        DockPressEvent.Cancelled -> {
+                            pressState = DockPressState.Idle
+                        }
+                    }
+                }
             },
     ) {
         DockSubstrate(cornerRadius = height / 2)
         DockActiveIndicatorLayer(
             activeIndex = activeIndex,
-            visible = pressedX == null,
+            pressState = pressState,
             tabBounds = tabBounds,
             dockWidthPx = dockWidthPx,
         )
         DockPressOverlayLayer(
-            pressedX = pressedX,
+            pressState = pressState,
             activeIndex = activeIndex,
             tabBounds = tabBounds,
             dockWidthPx = dockWidthPx,
@@ -155,281 +124,3 @@ private fun DockBarExpanded(
         )
     }
 }
-
-@Composable
-private fun DockSubstrate(cornerRadius: Dp) {
-    GlassSurface(
-        modifier = Modifier.fillMaxSize(),
-        cornerRadius = cornerRadius,
-        recordAsSource = true,
-    ) {}
-}
-
-@Composable
-private fun DockActiveIndicatorLayer(
-    activeIndex: Int,
-    visible: Boolean,
-    tabBounds: Map<Int, TabBounds>,
-    dockWidthPx: Float,
-) {
-    val alpha by animateFloatAsState(
-        targetValue = if (visible) 1f else 0f,
-        animationSpec = tween(durationMillis = OverlayFadeDurationMs, easing = FastOutSlowInEasing),
-        label = "Dock active indicator alpha",
-    )
-    val bounds = tabBounds[activeIndex] ?: return
-    if (alpha <= 0f || dockWidthPx <= 0f) return
-
-    val density = LocalDensity.current
-    val bbox = activeIndicatorBboxFor(bounds, dockWidthPx, density)
-
-    Box(
-        modifier = Modifier
-            .offset { IntOffset(bbox.leftPx.roundToInt(), 0) }
-            .width(with(density) { bbox.widthPx.toDp() })
-            .fillMaxHeight()
-            .padding(vertical = ActiveIndicatorVerticalInset)
-            .alpha(alpha)
-            .background(
-                color = RecipeTheme.colors.chromeActive,
-                shape = RoundedCornerShape(50),
-            ),
-    )
-}
-
-@Composable
-private fun DockPressOverlayLayer(
-    pressedX: Float?,
-    activeIndex: Int,
-    tabBounds: Map<Int, TabBounds>,
-    dockWidthPx: Float,
-    dockHeight: Dp,
-) {
-    val activeBounds = tabBounds[activeIndex] ?: return
-    val activeCenterX = activeBounds.offsetXPx + activeBounds.widthPx / 2f
-
-    val density = LocalDensity.current
-    val bleedPx = with(density) { PressOverlayBleed.toPx() }
-    val overlayWidthPx = activeBounds.widthPx + 2 * bleedPx
-    val centerXMin = overlayWidthPx / 2f
-    val centerXMax = (dockWidthPx - overlayWidthPx / 2f).coerceAtLeast(centerXMin)
-    val clampedPressedX = pressedX?.coerceIn(centerXMin, centerXMax)
-    val overlayCenterX = rememberPressOverlayCenterX(clampedPressedX, activeCenterX)
-
-    val alpha by animateFloatAsState(
-        targetValue = if (pressedX != null) 1f else 0f,
-        animationSpec = tween(durationMillis = OverlayFadeDurationMs, easing = FastOutSlowInEasing),
-        label = "Dock press overlay alpha",
-    )
-    if (alpha <= 0f || dockWidthPx <= 0f) return
-
-    val cornerRadius = (dockHeight - 2 * PressOverlayVerticalInset) / 2
-    val leftPx = overlayCenterX - overlayWidthPx / 2f
-    GlassSurface(
-        modifier = Modifier
-            .offset { IntOffset(leftPx.roundToInt(), 0) }
-            .width(with(density) { overlayWidthPx.toDp() })
-            .fillMaxHeight()
-            .padding(vertical = PressOverlayVerticalInset)
-            .scale(PressOverlayScale)
-            .alpha(alpha),
-        cornerRadius = cornerRadius,
-        glassStyle = RecipeTheme.glass.dockPress,
-    ) {}
-}
-
-@Composable
-private fun DockTabRow(
-    destinations: List<DockDestination>,
-    activeIndex: Int,
-    tabBounds: Map<Int, TabBounds>,
-    dockWidthPx: Float,
-    onTabSelectFromA11y: (DockDestination) -> Unit,
-    onTabBoundsChange: (Int, TabBounds) -> Unit,
-) {
-    val density = LocalDensity.current
-    Row(
-        modifier = Modifier.fillMaxSize(),
-        horizontalArrangement = Arrangement.spacedBy(2.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        destinations.forEachIndexed { index, destination ->
-            val cellBounds = tabBounds[index]
-            val contentOffsetPx = if (cellBounds != null && dockWidthPx > 0f) {
-                val bbox = activeIndicatorBboxFor(cellBounds, dockWidthPx, density)
-                val cellCenterX = cellBounds.offsetXPx + cellBounds.widthPx / 2f
-                bbox.centerPx - cellCenterX
-            } else {
-                0f
-            }
-            DockTabItem(
-                destination = destination,
-                isActive = index == activeIndex,
-                contentOffsetPx = contentOffsetPx,
-                onSelect = { onTabSelectFromA11y(destination) },
-                modifier = Modifier
-                    .weight(1f)
-                    .fillMaxHeight()
-                    .onGloballyPositioned { coords ->
-                        onTabBoundsChange(
-                            index,
-                            TabBounds(
-                                offsetXPx = coords.positionInParent().x,
-                                widthPx = coords.size.width.toFloat(),
-                            ),
-                        )
-                    },
-            )
-        }
-    }
-}
-
-@Composable
-private fun DockTabItem(
-    destination: DockDestination,
-    isActive: Boolean,
-    contentOffsetPx: Float,
-    onSelect: () -> Unit,
-    modifier: Modifier = Modifier,
-) {
-    val label = stringResource(destination.labelRes)
-    val a11yLabel = if (isActive) "$label, aktywna" else label
-    val tint = RecipeTheme.colors.content
-    Box(
-        modifier = modifier.semantics {
-            role = Role.Tab
-            selected = isActive
-            contentDescription = a11yLabel
-            onClick {
-                onSelect()
-                true
-            }
-        },
-        contentAlignment = Alignment.Center,
-    ) {
-        Column(
-            modifier = Modifier.offset { IntOffset(contentOffsetPx.roundToInt(), 0) },
-            horizontalAlignment = Alignment.CenterHorizontally,
-            verticalArrangement = Arrangement.Center,
-        ) {
-            UnstyledIcon(
-                imageVector = destination.icon,
-                contentDescription = null,
-                tint = tint,
-                modifier = Modifier.size(DockTabIconSize),
-            )
-            Spacer(modifier = Modifier.size(DockTabIconLabelGap))
-            BasicText(
-                text = label,
-                style = RecipeTheme.typography.label.copy(
-                    color = tint,
-                    fontSize = DockTabLabelFontSizeSp.sp,
-                    lineHeight = DockTabLabelLineHeightSp.sp,
-                ),
-            )
-        }
-    }
-}
-
-@Composable
-private fun rememberPressOverlayCenterX(
-    pressedCenterX: Float?,
-    activeCenterX: Float,
-): Float {
-    val animatable = remember { Animatable(activeCenterX) }
-    var wasPressed by remember { mutableStateOf(false) }
-
-    LaunchedEffect(pressedCenterX, activeCenterX) {
-        when {
-            pressedCenterX == null -> {
-                wasPressed = false
-                animatable.animateTo(
-                    targetValue = activeCenterX,
-                    animationSpec = tween(durationMillis = OverlaySlideDurationMs, easing = FastOutSlowInEasing),
-                )
-            }
-            !wasPressed -> {
-                wasPressed = true
-                animatable.animateTo(
-                    targetValue = pressedCenterX,
-                    animationSpec = tween(durationMillis = OverlaySlideDurationMs, easing = FastOutSlowInEasing),
-                )
-            }
-            else -> {
-                animatable.snapTo(pressedCenterX)
-            }
-        }
-    }
-
-    return animatable.value
-}
-
-private suspend fun PointerInputScope.trackDockGesture(
-    onPressXChange: (Float?) -> Unit,
-    onCommit: (Float) -> Unit,
-) {
-    awaitEachGesture {
-        val down = awaitFirstDown(requireUnconsumed = false)
-        down.consume()
-        val pointerId = down.id
-        onPressXChange(down.position.x)
-
-        while (true) {
-            val event = awaitPointerEvent()
-            val change = event.changes.firstOrNull { it.id == pointerId }
-            if (change == null) {
-                onPressXChange(null)
-                break
-            }
-            if (!change.pressed) {
-                onCommit(change.position.x)
-                onPressXChange(null)
-                change.consume()
-                break
-            }
-            if (change.positionChanged()) {
-                onPressXChange(change.position.x)
-            }
-            change.consume()
-        }
-    }
-}
-
-private fun floorTabIndex(x: Float, bounds: Map<Int, TabBounds>): Int? {
-    if (bounds.isEmpty()) return null
-    val sorted = bounds.entries.sortedBy { it.value.offsetXPx }
-    var result = sorted.first().key
-    for (entry in sorted) {
-        if (entry.value.offsetXPx <= x) {
-            result = entry.key
-        } else {
-            break
-        }
-    }
-    return result
-}
-
-private data class TabBounds(
-    val offsetXPx: Float,
-    val widthPx: Float,
-)
-
-private data class ActiveIndicatorBbox(
-    val leftPx: Float,
-    val rightPx: Float,
-) {
-    val widthPx: Float get() = (rightPx - leftPx).coerceAtLeast(0f)
-    val centerPx: Float get() = (leftPx + rightPx) / 2f
-}
-
-private fun activeIndicatorBboxFor(
-    cell: TabBounds,
-    dockWidthPx: Float,
-    density: Density,
-): ActiveIndicatorBbox {
-    val bleedPx = with(density) { ActiveIndicatorBleed.toPx() }
-    val edgeInsetPx = with(density) { ActiveIndicatorEdgeInset.toPx() }
-    val left = (cell.offsetXPx - bleedPx).coerceAtLeast(edgeInsetPx)
-    val right = (cell.offsetXPx + cell.widthPx + bleedPx).coerceAtMost(dockWidthPx - edgeInsetPx)
-    return ActiveIndicatorBbox(left, right)
-}

composeApp/src/commonMain/kotlin/dev/ulfrx/recipe/ui/components/dock/DockGeometry.kt

@@ -0,0 +1,57 @@
+package dev.ulfrx.recipe.ui.components.dock
+
+import androidx.compose.ui.unit.Density
+import androidx.compose.ui.unit.dp
+
+private val ActiveIndicatorBleed = 4.dp
+private val ActiveIndicatorEdgeInset = 5.dp
+
+internal data class TabBounds(
+    val offsetXPx: Float,
+    val widthPx: Float,
+)
+
+internal sealed interface DockPressState {
+    data object Idle : DockPressState
+    data class Pressing(val xPx: Float) : DockPressState
+}
+
+internal sealed interface DockPressEvent {
+    data class Pressing(val xPx: Float) : DockPressEvent
+    data class Released(val xPx: Float) : DockPressEvent
+    data object Cancelled : DockPressEvent
+}
+
+internal data class ActiveIndicatorBbox(
+    val leftPx: Float,
+    val rightPx: Float,
+) {
+    val widthPx: Float get() = (rightPx - leftPx).coerceAtLeast(0f)
+    val centerPx: Float get() = (leftPx + rightPx) / 2f
+}
+
+internal fun activeIndicatorBboxFor(
+    cell: TabBounds,
+    dockWidthPx: Float,
+    density: Density,
+): ActiveIndicatorBbox {
+    val bleedPx = with(density) { ActiveIndicatorBleed.toPx() }
+    val edgeInsetPx = with(density) { ActiveIndicatorEdgeInset.toPx() }
+    val left = (cell.offsetXPx - bleedPx).coerceAtLeast(edgeInsetPx)
+    val right = (cell.offsetXPx + cell.widthPx + bleedPx).coerceAtMost(dockWidthPx - edgeInsetPx)
+    return ActiveIndicatorBbox(left, right)
+}
+
+internal fun tabIndexAt(x: Float, bounds: Map<Int, TabBounds>): Int? {
+    if (bounds.isEmpty()) return null
+    val sorted = bounds.entries.sortedBy { it.value.offsetXPx }
+    var result = sorted.first().key
+    for (entry in sorted) {
+        if (entry.value.offsetXPx <= x) {
+            result = entry.key
+        } else {
+            break
+        }
+    }
+    return result
+}

composeApp/src/commonMain/kotlin/dev/ulfrx/recipe/ui/components/dock/DockGesture.kt

@@ -0,0 +1,82 @@
+package dev.ulfrx.recipe.ui.components.dock
+
+import androidx.compose.animation.core.Animatable
+import androidx.compose.animation.core.FastOutSlowInEasing
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.gestures.awaitEachGesture
+import androidx.compose.foundation.gestures.awaitFirstDown
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.input.pointer.PointerInputScope
+import androidx.compose.ui.input.pointer.positionChanged
+import dev.ulfrx.recipe.ui.components.dock.DockPressEvent.Cancelled
+import dev.ulfrx.recipe.ui.components.dock.DockPressEvent.Pressing
+import dev.ulfrx.recipe.ui.components.dock.DockPressEvent.Released
+
+private const val OverlaySlideDurationMs = 200
+
+@Composable
+internal fun rememberPressOverlayCenterX(
+    pressedCenterX: Float?,
+    activeCenterX: Float,
+): Float {
+    val animatable = remember { Animatable(activeCenterX) }
+    var wasPressed by remember { mutableStateOf(false) }
+
+    LaunchedEffect(pressedCenterX, activeCenterX) {
+        when {
+            pressedCenterX == null -> {
+                wasPressed = false
+                animatable.animateTo(
+                    targetValue = activeCenterX,
+                    animationSpec = tween(durationMillis = OverlaySlideDurationMs, easing = FastOutSlowInEasing),
+                )
+            }
+
+            !wasPressed -> {
+                wasPressed = true
+                animatable.animateTo(
+                    targetValue = pressedCenterX,
+                    animationSpec = tween(durationMillis = OverlaySlideDurationMs, easing = FastOutSlowInEasing),
+                )
+            }
+
+            else -> {
+                animatable.snapTo(pressedCenterX)
+            }
+        }
+    }
+
+    return animatable.value
+}
+
+internal suspend fun PointerInputScope.trackDockGesture(onPressEvent: (DockPressEvent) -> Unit) {
+    awaitEachGesture {
+        val pressDown = awaitFirstDown(requireUnconsumed = false)
+        pressDown.consume()
+        val pointerId = pressDown.id
+        onPressEvent(Pressing(pressDown.position.x))
+
+        while (true) {
+            val pointerEvent = awaitPointerEvent()
+            val pressChange = pointerEvent.changes.firstOrNull { it.id == pointerId }
+            if (pressChange == null) {
+                onPressEvent(Cancelled)
+                break
+            }
+            if (!pressChange.pressed) {
+                onPressEvent(Released(pressChange.position.x))
+                pressChange.consume()
+                break
+            }
+            if (pressChange.positionChanged()) {
+                onPressEvent(Pressing(pressChange.position.x))
+            }
+            pressChange.consume()
+        }
+    }
+}

composeApp/src/commonMain/kotlin/dev/ulfrx/recipe/ui/components/dock/DockLayers.kt

@@ -0,0 +1,115 @@
+package dev.ulfrx.recipe.ui.components.dock
+
+import androidx.compose.animation.core.FastOutSlowInEasing
+import androidx.compose.animation.core.animateFloatAsState
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.draw.scale
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.IntOffset
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.times
+import dev.ulfrx.recipe.ui.components.glass.GlassSurface
+import dev.ulfrx.recipe.ui.theme.RecipeTheme
+import kotlin.math.roundToInt
+
+private val PressOverlayBleed = 4.dp
+private val PressOverlayVerticalInset = 0.dp
+private val ActiveIndicatorVerticalInset = 5.dp
+private const val PressOverlayScale = 1.22f
+private const val OverlayFadeDurationMs = 120
+
+@Composable
+internal fun DockSubstrate(cornerRadius: Dp) {
+    GlassSurface(
+        modifier = Modifier.fillMaxSize(),
+        cornerRadius = cornerRadius,
+        recordAsSource = true,
+    ) {}
+}
+
+@Composable
+internal fun DockActiveIndicatorLayer(
+    activeIndex: Int,
+    pressState: DockPressState,
+    tabBounds: Map<Int, TabBounds>,
+    dockWidthPx: Float,
+) {
+    val alpha by animateFloatAsState(
+        targetValue = if (pressState is DockPressState.Idle) 1f else 0f,
+        animationSpec = tween(durationMillis = OverlayFadeDurationMs, easing = FastOutSlowInEasing),
+        label = "Dock active indicator alpha",
+    )
+    val bounds = tabBounds[activeIndex] ?: return
+    if (alpha <= 0f || dockWidthPx <= 0f) return
+
+    val density = LocalDensity.current
+    val bbox = activeIndicatorBboxFor(bounds, dockWidthPx, density)
+
+    Box(
+        modifier = Modifier
+            .offset { IntOffset(bbox.leftPx.roundToInt(), 0) }
+            .width(with(density) { bbox.widthPx.toDp() })
+            .fillMaxHeight()
+            .padding(vertical = ActiveIndicatorVerticalInset)
+            .alpha(alpha)
+            .background(
+                color = RecipeTheme.colors.chromeActive,
+                shape = RoundedCornerShape(50),
+            ),
+    )
+}
+
+@Composable
+internal fun DockPressOverlayLayer(
+    pressState: DockPressState,
+    activeIndex: Int,
+    tabBounds: Map<Int, TabBounds>,
+    dockWidthPx: Float,
+    dockHeight: Dp,
+) {
+    val activeBounds = tabBounds[activeIndex] ?: return
+    val activeCenterX = activeBounds.offsetXPx + activeBounds.widthPx / 2f
+
+    val density = LocalDensity.current
+    val bleedPx = with(density) { PressOverlayBleed.toPx() }
+    val overlayWidthPx = activeBounds.widthPx + 2 * bleedPx
+    val centerXMin = overlayWidthPx / 2f
+    val centerXMax = (dockWidthPx - overlayWidthPx / 2f).coerceAtLeast(centerXMin)
+    val pressingXPx = (pressState as? DockPressState.Pressing)?.xPx
+    val clampedPressPositionPx = pressingXPx?.coerceIn(centerXMin, centerXMax)
+    val overlayCenterX = rememberPressOverlayCenterX(clampedPressPositionPx, activeCenterX)
+
+    val alpha by animateFloatAsState(
+        targetValue = if (pressState is DockPressState.Pressing) 1f else 0f,
+        animationSpec = tween(durationMillis = OverlayFadeDurationMs, easing = FastOutSlowInEasing),
+        label = "Dock press overlay alpha",
+    )
+    if (alpha <= 0f || dockWidthPx <= 0f) return
+
+    val cornerRadius = (dockHeight - 2 * PressOverlayVerticalInset) / 2
+    val leftPx = overlayCenterX - overlayWidthPx / 2f
+    GlassSurface(
+        modifier = Modifier
+            .offset { IntOffset(leftPx.roundToInt(), 0) }
+            .width(with(density) { overlayWidthPx.toDp() })
+            .fillMaxHeight()
+            .padding(vertical = PressOverlayVerticalInset)
+            .scale(PressOverlayScale)
+            .alpha(alpha),
+        cornerRadius = cornerRadius,
+        glassStyle = RecipeTheme.glass.dockPress,
+    ) {}
+}

composeApp/src/commonMain/kotlin/dev/ulfrx/recipe/ui/components/dock/DockTabRow.kt

@@ -0,0 +1,130 @@
+package dev.ulfrx.recipe.ui.components.dock
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.text.BasicText
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.layout.onGloballyPositioned
+import androidx.compose.ui.layout.positionInParent
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.semantics.Role
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.semantics.onClick
+import androidx.compose.ui.semantics.role
+import androidx.compose.ui.semantics.selected
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.unit.IntOffset
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.composeunstyled.UnstyledIcon
+import dev.ulfrx.recipe.navigation.DockDestination
+import dev.ulfrx.recipe.ui.theme.RecipeTheme
+import org.jetbrains.compose.resources.stringResource
+import kotlin.math.roundToInt
+
+private val DockTabIconSize = 18.dp
+private val DockTabIconLabelGap = 2.dp
+private const val DockTabLabelFontSizeSp = 11
+private const val DockTabLabelLineHeightSp = 13
+
+@Composable
+internal fun DockTabRow(
+    destinations: List<DockDestination>,
+    activeIndex: Int,
+    tabBounds: Map<Int, TabBounds>,
+    dockWidthPx: Float,
+    onTabSelectFromA11y: (DockDestination) -> Unit,
+    onTabBoundsChange: (Int, TabBounds) -> Unit,
+) {
+    val density = LocalDensity.current
+    Row(
+        modifier = Modifier.fillMaxSize(),
+        horizontalArrangement = Arrangement.spacedBy(2.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        destinations.forEachIndexed { index, destination ->
+            val cellBounds = tabBounds[index]
+            val contentOffsetPx = if (cellBounds != null && dockWidthPx > 0f) {
+                val bbox = activeIndicatorBboxFor(cellBounds, dockWidthPx, density)
+                val cellCenterX = cellBounds.offsetXPx + cellBounds.widthPx / 2f
+                bbox.centerPx - cellCenterX
+            } else {
+                0f
+            }
+            DockTabItem(
+                destination = destination,
+                isActive = index == activeIndex,
+                contentOffsetPx = contentOffsetPx,
+                onSelect = { onTabSelectFromA11y(destination) },
+                modifier = Modifier
+                    .weight(1f)
+                    .fillMaxHeight()
+                    .onGloballyPositioned { coords ->
+                        onTabBoundsChange(
+                            index,
+                            TabBounds(
+                                offsetXPx = coords.positionInParent().x,
+                                widthPx = coords.size.width.toFloat(),
+                            ),
+                        )
+                    },
+            )
+        }
+    }
+}
+
+@Composable
+private fun DockTabItem(
+    destination: DockDestination,
+    isActive: Boolean,
+    contentOffsetPx: Float,
+    onSelect: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val label = stringResource(destination.labelRes)
+    val a11yLabel = if (isActive) "$label, aktywna" else label
+    val tint = RecipeTheme.colors.content
+    Box(
+        modifier = modifier.semantics {
+            role = Role.Tab
+            selected = isActive
+            contentDescription = a11yLabel
+            onClick {
+                onSelect()
+                true
+            }
+        },
+        contentAlignment = Alignment.Center,
+    ) {
+        Column(
+            modifier = Modifier.offset { IntOffset(contentOffsetPx.roundToInt(), 0) },
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center,
+        ) {
+            UnstyledIcon(
+                imageVector = destination.icon,
+                contentDescription = null,
+                tint = tint,
+                modifier = Modifier.size(DockTabIconSize),
+            )
+            Spacer(modifier = Modifier.size(DockTabIconLabelGap))
+            BasicText(
+                text = label,
+                style = RecipeTheme.typography.label.copy(
+                    color = tint,
+                    fontSize = DockTabLabelFontSizeSp.sp,
+                    lineHeight = DockTabLabelLineHeightSp.sp,
+                ),
+            )
+        }
+    }
+}