| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| package androidx.compose.foundation.shape.corner |
| |
| import androidx.compose.ui.geometry.Size |
| import androidx.compose.Immutable |
| import androidx.compose.Stable |
| import androidx.ui.unit.Density |
| import androidx.ui.unit.Dp |
| import androidx.ui.util.annotation.FloatRange |
| import androidx.ui.util.annotation.IntRange |
| |
| /** |
| * Defines size of a corner in pixels. For example for rounded shape it can be a corner radius. |
| */ |
| @Immutable |
| interface CornerSize { |
| /** |
| * Converts the [CornerSize] to pixels. |
| * |
| * @param shapeSize the size of the shape |
| * @param density the current density of the screen. |
| * |
| * @return resolved size of the corner in pixels |
| */ |
| fun toPx(shapeSize: Size, density: Density): Float |
| } |
| |
| /** |
| * Creates [CornerSize] with provided size. |
| * @param size the corner size defined in [Dp]. |
| */ |
| @Stable |
| fun CornerSize(size: Dp): CornerSize = DpCornerSize(size) |
| |
| private data class DpCornerSize(private val size: Dp) : CornerSize { |
| override fun toPx(shapeSize: Size, density: Density) = |
| with(density) { size.toPx() } |
| } |
| |
| /** |
| * Creates [CornerSize] with provided size. |
| * @param size the corner size defined in pixels. |
| */ |
| @Stable |
| fun CornerSize(size: Float): CornerSize = PxCornerSize(size) |
| |
| private data class PxCornerSize(private val size: Float) : CornerSize { |
| override fun toPx(shapeSize: Size, density: Density) = size |
| } |
| |
| /** |
| * Creates [CornerSize] with provided size. |
| * @param percent the corner size defined in percents of the shape's smaller side. |
| * Can't be negative or larger then 100 percents. |
| */ |
| @Stable |
| fun CornerSize(@IntRange(from = 0, to = 100) percent: Int): CornerSize = |
| PercentCornerSize(percent.toFloat()) |
| |
| /** |
| * Creates [CornerSize] with provided size. |
| * @param percent the corner size defined in float percents of the shape's smaller side. |
| * Can't be negative or larger then 100 percents. |
| */ |
| private data class PercentCornerSize( |
| @FloatRange(from = 0.0, to = 100.0) private val percent: Float |
| ) : CornerSize { |
| init { |
| if (percent < 0 || percent > 100) { |
| throw IllegalArgumentException("The percent should be in the range of [0, 100]") |
| } |
| } |
| |
| override fun toPx(shapeSize: Size, density: Density) = |
| shapeSize.minDimension * (percent / 100f) |
| } |
| |
| /** |
| * [CornerSize] always equals to zero. |
| */ |
| @Stable |
| val ZeroCornerSize: CornerSize = object : CornerSize { |
| override fun toPx(shapeSize: Size, density: Density) = 0.0f |
| } |