| /* |
| * 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.ui.graphics.Outline |
| import androidx.compose.ui.graphics.Shape |
| import androidx.ui.unit.Density |
| import androidx.ui.util.nativeClass |
| import kotlin.math.min |
| |
| /** |
| * Base class for [Shape]s defined by four [CornerSize]s. |
| * |
| * @see RoundedCornerShape for an example of the usage. |
| * |
| * @param topLeft a size of the top left corner |
| * @param topRight a size of the top right corner |
| * @param bottomRight a size of the bottom left corner |
| * @param bottomLeft a size of the bottom right corner |
| */ |
| abstract class CornerBasedShape( |
| val topLeft: CornerSize, |
| val topRight: CornerSize, |
| val bottomRight: CornerSize, |
| val bottomLeft: CornerSize |
| ) : Shape { |
| |
| final override fun createOutline(size: Size, density: Density): Outline { |
| val minDimension = size.minDimension |
| val topLeft = min(topLeft.toPx(size, density), minDimension) |
| val topRight = min(topRight.toPx(size, density), minDimension) |
| val bottomRight = min(bottomRight.toPx(size, density), minDimension - topRight) |
| val bottomLeft = min(bottomLeft.toPx(size, density), minDimension - topLeft) |
| require(topLeft >= 0.0f && topRight >= 0.0f && bottomRight >= 0.0f && bottomLeft >= 0.0f) { |
| "Corner size in Px can't be negative(topLeft = $topLeft, topRight = $topRight, " + |
| "bottomRight = $bottomRight, bottomLeft = $bottomLeft)!" |
| } |
| return createOutline(size, topLeft, topRight, bottomRight, bottomLeft) |
| } |
| |
| /** |
| * Creates [Outline] of this shape for the given [size]. |
| * |
| * @param size the size of the shape boundary. |
| * @param topLeft the resolved size of the top left corner |
| * @param topRight the resolved size for the top right corner |
| * @param bottomRight the resolved size for the bottom left corner |
| * @param bottomLeft the resolved size for the bottom right corner |
| */ |
| abstract fun createOutline( |
| size: Size, |
| topLeft: Float, |
| topRight: Float, |
| bottomRight: Float, |
| bottomLeft: Float |
| ): Outline |
| |
| /** |
| * Creates a copy of this Shape with a new corner sizes. |
| * |
| * @param topLeft a size of the top left corner |
| * @param topRight a size of the top right corner |
| * @param bottomRight a size of the bottom left corner |
| * @param bottomLeft a size of the bottom right corner |
| */ |
| abstract fun copy( |
| topLeft: CornerSize = this.topLeft, |
| topRight: CornerSize = this.topRight, |
| bottomRight: CornerSize = this.bottomRight, |
| bottomLeft: CornerSize = this.bottomLeft |
| ): CornerBasedShape |
| |
| /** |
| * Creates a copy of this Shape with a new corner size. |
| * @param all a size to apply for all four corners |
| */ |
| fun copy(all: CornerSize): CornerBasedShape = copy(all, all, all, all) |
| |
| // Implementations can't be data classes as we defined the abstract copy() method and the data |
| // class code generation is not compatible with it, so we provide our hashCode() and equals() |
| override fun equals(other: Any?): Boolean { |
| if (this === other) return true |
| if (this.nativeClass() != other?.nativeClass()) return false |
| |
| other as CornerBasedShape |
| |
| if (topLeft != other.topLeft) return false |
| if (topRight != other.topRight) return false |
| if (bottomRight != other.bottomRight) return false |
| if (bottomLeft != other.bottomLeft) return false |
| |
| return true |
| } |
| |
| override fun hashCode(): Int { |
| var result = topLeft.hashCode() |
| result = 31 * result + topRight.hashCode() |
| result = 31 * result + bottomRight.hashCode() |
| result = 31 * result + bottomLeft.hashCode() |
| return result |
| } |
| } |