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/*
* 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.ui.core
/**
* A [Modifier.Element] that changes the way a UI component is measured and laid out.
*/
interface LayoutModifier : Modifier.Element {
/**
* Modifies [constraints] for performing measurement of the modified layout element.
*/
fun DensityScope.modifyConstraints(constraints: Constraints): Constraints
/**
* Returns the container size of a modified layout element given the original container
* measurement [constraints] and the measured [childSize].
*/
fun DensityScope.modifySize(constraints: Constraints, childSize: IntPxSize): IntPxSize
/**
* Determines the modified minimum intrinsic width of [measurable].
* See [Measurable.minIntrinsicWidth].
*/
fun DensityScope.minIntrinsicWidthOf(measurable: Measurable, height: IntPx): IntPx
/**
* Determines the modified maximum intrinsic width of [measurable].
* See [Measurable.maxIntrinsicWidth].
*/
fun DensityScope.maxIntrinsicWidthOf(measurable: Measurable, height: IntPx): IntPx
/**
* Determines the modified minimum intrinsic height of [measurable].
* See [Measurable.minIntrinsicHeight].
*/
fun DensityScope.minIntrinsicHeightOf(measurable: Measurable, width: IntPx): IntPx
/**
* Determines the modified maximum intrinsic height of [measurable].
* See [Measurable.maxIntrinsicHeight].
*/
fun DensityScope.maxIntrinsicHeightOf(measurable: Measurable, width: IntPx): IntPx
/**
* Returns the position of a modified child of size [childSize] within a container of
* size [containerSize].
*/
fun DensityScope.modifyPosition(
childPosition: IntPxPosition,
childSize: IntPxSize,
containerSize: IntPxSize
): IntPxPosition
/**
* Returns the modified position of [line] given its unmodified [value].
*/
fun DensityScope.modifyAlignmentLine(
line: AlignmentLine,
value: IntPx?
): IntPx?
}