90 lines
2.8 KiB
C#
90 lines
2.8 KiB
C#
/**
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* Copyright (c) 2014, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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namespace Facebook.CSSLayout
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{
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/**
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* Where the output of {@link LayoutEngine#layoutNode(CSSNode, float)} will go in the CSSNode.
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*/
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class CSSLayout
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{
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// This value was chosen based on empiracle data. Even the most complicated
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// layouts should not require more than 16 entries to fit within the cache.
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public const int MAX_CACHED_RESULT_COUNT = 16;
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public const int POSITION_LEFT = 0;
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public const int POSITION_TOP = 1;
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public const int POSITION_RIGHT = 2;
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public const int POSITION_BOTTOM = 3;
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public const int DIMENSION_WIDTH = 0;
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public const int DIMENSION_HEIGHT = 1;
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public float[] position = new float[4];
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public float[] dimensions = {
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CSSConstants.Undefined,
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CSSConstants.Undefined
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};
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public CSSDirection direction = CSSDirection.LTR;
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public float flexBasis;
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public int generationCount;
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public CSSDirection? lastParentDirection;
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public int nextCachedMeasurementsIndex;
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public CSSCachedMeasurement[] cachedMeasurements = new CSSCachedMeasurement[MAX_CACHED_RESULT_COUNT];
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public float[] measuredDimensions = {
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CSSConstants.Undefined,
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CSSConstants.Undefined
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};
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public CSSCachedMeasurement cachedLayout = new CSSCachedMeasurement();
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public void resetResult()
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{
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FillArray(position, 0);
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FillArray(dimensions, CSSConstants.Undefined);
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direction = CSSDirection.LTR;
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flexBasis = 0;
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generationCount = 0;
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lastParentDirection = null;
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nextCachedMeasurementsIndex = 0;
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measuredDimensions[DIMENSION_WIDTH] = CSSConstants.Undefined;
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measuredDimensions[DIMENSION_HEIGHT] = CSSConstants.Undefined;
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cachedLayout.widthMeasureMode = null;
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cachedLayout.heightMeasureMode = null;
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}
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public override string ToString()
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{
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return "layout: {" +
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"left: " + position[POSITION_LEFT] + ", " +
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"top: " + position[POSITION_TOP] + ", " +
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"width: " + dimensions[DIMENSION_WIDTH] + ", " +
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"height: " + dimensions[DIMENSION_HEIGHT] + ", " +
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"direction: " + direction +
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"}";
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}
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static void FillArray<T>(T[] array, T value)
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{
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for (var i = 0; i != array.Length; ++i)
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array[i] = value;
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}
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}
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}
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