Jetpack Compose Snackbar's swipe-to-dismiss behavior

SwipeableSnackbarHost.kt

/*
 * Copyright (c) 2023. Héctor de Isidro - hector6872
 *
 * 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.
 */

enum class SwipeDirection {
  START,
  IDLE,
  END,
}

@OptIn(ExperimentalMaterialApi::class)
@Composable
fun SwipeableSnackbarHost(hostState: SnackbarHostState) {
  if (hostState.currentSnackbarData == null) return
  val swipeableState = rememberSwipeableState(IDLE)
  var size by remember { mutableStateOf(Size.Zero) }
  val width = remember(size) { if (size.width == 0f) 1f else size.width }

  if (swipeableState.isAnimationRunning) {
    DisposableEffect(swipeableState) {
      onDispose {
        when (swipeableState.currentValue) {
          START,
          END -> hostState.currentSnackbarData?.dismiss()

          else -> return@onDispose
        }
      }
    }
  }
  SnackbarHost(
    hostState,
    modifier = Modifier
      .onSizeChanged { size = Size(it.width.toFloat(), it.height.toFloat()) }
      .swipeable(
        state = swipeableState,
        anchors = mapOf(
          -width to START,
          0f to IDLE,
          width to END,
        ),
        orientation = Horizontal
      ),
    snackbar = { snackbarData ->
      Snackbar(
        snackbarData,
        modifier = Modifier.offset { IntOffset(swipeableState.offset.value.roundToInt(), 0) }
      )
    }
  )
}