commonMain.com.outsidesource.oskitcompose.geometry.PopupShape.kt Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of oskit-compose Show documentation
An opinionated architecture/library for Compose Multiplatform development
The newest version!
package com.outsidesource.oskitcompose.geometry

import androidx.compose.ui.geometry.CornerRadius
import androidx.compose.ui.geometry.RoundRect
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Outline
import androidx.compose.ui.graphics.Path
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.unit.Density
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.dp

enum class PopupShapeCaretPosition {
    Top,
    Bottom,
    Start,
    End,
}

class PopupShape(
    private val cornerRadius: Dp = 8.dp,
    private val caretThickness: Dp = 20.dp,
    private val caretPointHeight: Dp = 12.dp,
    private val caretOffset: Float = .5f,
    private val caretPosition: PopupShapeCaretPosition = PopupShapeCaretPosition.Bottom,
): Shape {
    override fun createOutline(size: Size, layoutDirection: LayoutDirection, density: Density): Outline {
        with(density) {
            val path = Path()

            path.addRoundRect(
                RoundRect(
                    left = 0f,
                    top = 0f,
                    right = size.width,
                    bottom = size.height,
                    cornerRadius = CornerRadius(cornerRadius.toPx(), cornerRadius.toPx())
                )
            )

            val offsetDimensionTotalSize = when (caretPosition) {
                PopupShapeCaretPosition.Bottom,
                PopupShapeCaretPosition.Top -> size.width - caretThickness.toPx() - cornerRadius.toPx() * 2
                else -> size.height - caretThickness.toPx() - cornerRadius.toPx() * 2
            }

            val offsetInitial = (caretThickness.toPx() / 2) + cornerRadius.toPx()

            when (caretPosition) {
                PopupShapeCaretPosition.Bottom -> {
                    path.moveTo((offsetDimensionTotalSize * caretOffset) + offsetInitial - (caretThickness.toPx() / 2), size.height)
                    path.lineTo((offsetDimensionTotalSize * caretOffset) + offsetInitial, size.height + caretPointHeight.toPx())
                    path.lineTo((offsetDimensionTotalSize * caretOffset) + offsetInitial + (caretThickness.toPx() / 2), size.height)
                }
                PopupShapeCaretPosition.Top -> {
                    path.moveTo((offsetDimensionTotalSize * caretOffset) + offsetInitial - (caretThickness.toPx() / 2), 0f)
                    path.lineTo((offsetDimensionTotalSize * caretOffset) + offsetInitial, -caretPointHeight.toPx())
                    path.lineTo((offsetDimensionTotalSize * caretOffset) + offsetInitial + (caretThickness.toPx() / 2), 0f)
                }
                PopupShapeCaretPosition.Start -> {
                    path.moveTo(0f, (offsetDimensionTotalSize * caretOffset) + offsetInitial - (caretThickness.toPx() / 2))
                    path.lineTo(-caretPointHeight.toPx(), (offsetDimensionTotalSize * caretOffset) + offsetInitial)
                    path.lineTo(0f, (offsetDimensionTotalSize * caretOffset) + offsetInitial + (caretThickness.toPx() / 2))
                }
                PopupShapeCaretPosition.End -> {
                    path.moveTo(size.width, (offsetDimensionTotalSize * caretOffset) + offsetInitial - (caretThickness.toPx() / 2))
                    path.lineTo(size.width + caretPointHeight.toPx(), (offsetDimensionTotalSize * caretOffset) + offsetInitial)
                    path.lineTo(size.width, (offsetDimensionTotalSize * caretOffset) + offsetInitial + (caretThickness.toPx() / 2))
                }
            }

            path.close()

            return Outline.Generic(path)
        }
    }
}