109 lines
3.8 KiB
Kotlin
109 lines
3.8 KiB
Kotlin
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package eu.kanade.presentation.components
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import androidx.compose.foundation.BorderStroke
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import androidx.compose.foundation.background
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import androidx.compose.foundation.border
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import androidx.compose.foundation.combinedClickable
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import androidx.compose.foundation.interaction.MutableInteractionSource
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import androidx.compose.foundation.layout.Box
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import androidx.compose.material.ripple.rememberRipple
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import androidx.compose.material3.ColorScheme
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import androidx.compose.material3.LocalAbsoluteTonalElevation
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import androidx.compose.material3.LocalContentColor
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import androidx.compose.material3.MaterialTheme
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import androidx.compose.material3.Shapes
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import androidx.compose.material3.contentColorFor
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import androidx.compose.runtime.Composable
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import androidx.compose.runtime.CompositionLocalProvider
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import androidx.compose.runtime.NonRestartableComposable
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import androidx.compose.runtime.ReadOnlyComposable
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import androidx.compose.runtime.remember
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.draw.clip
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import androidx.compose.ui.draw.shadow
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import androidx.compose.ui.graphics.Color
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import androidx.compose.ui.graphics.Shape
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import androidx.compose.ui.graphics.compositeOver
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import androidx.compose.ui.semantics.Role
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import androidx.compose.ui.unit.Dp
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import androidx.compose.ui.unit.dp
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import eu.kanade.presentation.util.minimumTouchTargetSize
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import kotlin.math.ln
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@Composable
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@NonRestartableComposable
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fun Surface(
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onClick: () -> Unit,
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modifier: Modifier = Modifier,
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onLongClick: (() -> Unit)? = null,
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enabled: Boolean = true,
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shape: Shape = Shapes.None,
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color: Color = MaterialTheme.colorScheme.surface,
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contentColor: Color = contentColorFor(color),
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tonalElevation: Dp = 0.dp,
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shadowElevation: Dp = 0.dp,
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border: BorderStroke? = null,
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interactionSource: MutableInteractionSource = remember { MutableInteractionSource() },
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content: @Composable () -> Unit,
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) {
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val absoluteElevation = LocalAbsoluteTonalElevation.current + tonalElevation
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CompositionLocalProvider(
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LocalContentColor provides contentColor,
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LocalAbsoluteTonalElevation provides absoluteElevation,
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) {
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Box(
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modifier = modifier
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.minimumTouchTargetSize()
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.surface(
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shape = shape,
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backgroundColor = surfaceColorAtElevation(
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color = color,
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elevation = absoluteElevation,
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),
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border = border,
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shadowElevation = shadowElevation,
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)
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.combinedClickable(
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interactionSource = interactionSource,
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indication = rememberRipple(),
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enabled = enabled,
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role = Role.Button,
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onLongClick = onLongClick,
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onClick = onClick,
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),
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propagateMinConstraints = true,
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) {
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content()
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}
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}
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}
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private fun Modifier.surface(
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shape: Shape,
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backgroundColor: Color,
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border: BorderStroke?,
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shadowElevation: Dp,
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) = this
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.shadow(shadowElevation, shape, clip = false)
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.then(if (border != null) Modifier.border(border, shape) else Modifier)
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.background(color = backgroundColor, shape = shape)
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.clip(shape)
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@Composable
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@ReadOnlyComposable
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private fun surfaceColorAtElevation(color: Color, elevation: Dp): Color {
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return if (color == MaterialTheme.colorScheme.surface) {
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MaterialTheme.colorScheme.surfaceColorAtElevation(elevation)
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} else {
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color
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}
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}
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private fun ColorScheme.surfaceColorAtElevation(
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elevation: Dp,
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): Color {
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if (elevation == 0.dp) return surface
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val alpha = ((4.5f * ln(elevation.value + 1)) + 2f) / 100f
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return surfaceTint.copy(alpha = alpha).compositeOver(surface)
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}
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