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/*
* Copyright (C) 2012 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 com.android.inputmethod.latin.utils;
import javax.annotation.Nonnull;
public final class CoordinateUtils {
private static final int INDEX_X = 0;
private static final int INDEX_Y = 1;
private static final int ELEMENT_SIZE = INDEX_Y + 1;
private CoordinateUtils() {
// This utility class is not publicly instantiable.
}
@Nonnull
public static int[] newInstance() {
return new int[ELEMENT_SIZE];
}
public static int x(@Nonnull final int[] coords) {
return coords[INDEX_X];
}
public static int y(@Nonnull final int[] coords) {
return coords[INDEX_Y];
}
public static void set(@Nonnull final int[] coords, final int x, final int y) {
coords[INDEX_X] = x;
coords[INDEX_Y] = y;
}
public static void copy(@Nonnull final int[] destination, @Nonnull final int[] source) {
destination[INDEX_X] = source[INDEX_X];
destination[INDEX_Y] = source[INDEX_Y];
}
@Nonnull
public static int[] newCoordinateArray(final int arraySize) {
return new int[ELEMENT_SIZE * arraySize];
}
@Nonnull
public static int[] newCoordinateArray(final int arraySize,
final int defaultX, final int defaultY) {
final int[] result = new int[ELEMENT_SIZE * arraySize];
for (int i = 0; i < arraySize; ++i) {
setXYInArray(result, i, defaultX, defaultY);
}
return result;
}
public static int xFromArray(@Nonnull final int[] coordsArray, final int index) {
return coordsArray[ELEMENT_SIZE * index + INDEX_X];
}
public static int yFromArray(@Nonnull final int[] coordsArray, final int index) {
return coordsArray[ELEMENT_SIZE * index + INDEX_Y];
}
@Nonnull
public static int[] coordinateFromArray(@Nonnull final int[] coordsArray, final int index) {
final int[] coords = newInstance();
set(coords, xFromArray(coordsArray, index), yFromArray(coordsArray, index));
return coords;
}
public static void setXYInArray(@Nonnull final int[] coordsArray, final int index,
final int x, final int y) {
final int baseIndex = ELEMENT_SIZE * index;
coordsArray[baseIndex + INDEX_X] = x;
coordsArray[baseIndex + INDEX_Y] = y;
}
public static void setCoordinateInArray(@Nonnull final int[] coordsArray, final int index,
@Nonnull final int[] coords) {
setXYInArray(coordsArray, index, x(coords), y(coords));
}
}
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