/*
* Copyright 2000-2015 JetBrains s.r.o.
*
* 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.intellij.diff.util;
import com.intellij.diff.fragments.DiffFragment;
import com.intellij.diff.fragments.LineFragment;
import com.intellij.openapi.util.Couple;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.List;
public enum Side {
LEFT(0),
RIGHT(1);
private final int myIndex;
Side(int index) {
myIndex = index;
}
@NotNull
public static Side fromIndex(int index) {
if (index == 0) return LEFT;
if (index == 1) return RIGHT;
throw new IndexOutOfBoundsException("index: " + index);
}
@NotNull
public static Side fromLeft(boolean isLeft) {
return isLeft ? LEFT : RIGHT;
}
@NotNull
public static Side fromRight(boolean isRight) {
return isRight ? RIGHT : LEFT;
}
public int getIndex() {
return myIndex;
}
public boolean isLeft() {
return myIndex == 0;
}
@NotNull
public Side other() {
return isLeft() ? RIGHT : LEFT;
}
@NotNull
public Side other(boolean other) {
return other ? other() : this;
}
//
// Helpers
//
public int select(int left, int right) {
return isLeft() ? left : right;
}
@Nullable
@Contract("!null, !null -> !null; null, null -> null")
public <T> T select(@Nullable T left, @Nullable T right) {
return isLeft() ? left : right;
}
@NotNull
public <T> T selectNotNull(@NotNull T left, @NotNull T right) {
return isLeft() ? left : right;
}
public boolean select(@NotNull boolean[] array) {
assert array.length == 2;
return array[myIndex];
}
public int select(@NotNull int[] array) {
assert array.length == 2;
return array[myIndex];
}
public <T> T select(@NotNull T[] array) {
assert array.length == 2;
return array[myIndex];
}
@NotNull
public <T> T selectNotNull(@NotNull T[] array) {
assert array.length == 2;
return array[myIndex];
}
public <T> T select(@NotNull List<T> list) {
assert list.size() == 2;
return list.get(myIndex);
}
@NotNull
public <T> T selectNotNull(@NotNull List<T> list) {
assert list.size() == 2;
return list.get(myIndex);
}
public <T> T select(@NotNull Couple<T> region) {
return isLeft() ? region.first : region.second;
}
@NotNull
public <T> T selectNotNull(@NotNull Couple<T> region) {
return isLeft() ? region.first : region.second;
}
@Nullable
public static <T> Side fromValue(@NotNull List<? extends T> list, @Nullable T value) {
assert list.size() == 2;
int index = list.indexOf(value);
return index != -1 ? fromIndex(index) : null;
}
//
// Fragments
//
public int getStartOffset(@NotNull DiffFragment fragment) {
return isLeft() ? fragment.getStartOffset1() : fragment.getStartOffset2();
}
public int getEndOffset(@NotNull DiffFragment fragment) {
return isLeft() ? fragment.getEndOffset1() : fragment.getEndOffset2();
}
public int getStartLine(@NotNull LineFragment fragment) {
return isLeft() ? fragment.getStartLine1() : fragment.getStartLine2();
}
public int getEndLine(@NotNull LineFragment fragment) {
return isLeft() ? fragment.getEndLine1() : fragment.getEndLine2();
}
}