PaddingValues plus operator

PaddingValuesExtensions.kt

package be.digitalia.compose.ui

import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.runtime.Stable
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.LayoutDirection

operator fun PaddingValues.plus(other: PaddingValues): PaddingValues =
    CompositePaddingValues(this, other)

@Stable
private data class CompositePaddingValues(
    private val first: PaddingValues,
    private val second: PaddingValues
) : PaddingValues {
    override fun calculateLeftPadding(layoutDirection: LayoutDirection): Dp {
        return first.calculateLeftPadding(layoutDirection) +
                second.calculateLeftPadding(layoutDirection)
    }

    override fun calculateTopPadding(): Dp {
        return first.calculateTopPadding() + second.calculateTopPadding()
    }

    override fun calculateRightPadding(layoutDirection: LayoutDirection): Dp {
        return first.calculateRightPadding(layoutDirection) +
                second.calculateRightPadding(layoutDirection)
    }

    override fun calculateBottomPadding(): Dp {
        return first.calculateBottomPadding() + second.calculateBottomPadding()
    }
}