| /*=============================================================================# |
| # Copyright (c) 2018, 2021 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.jcommons.text.core; |
| |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| |
| @NonNullByDefault |
| public class BasicTextRegion implements TextRegion { |
| |
| |
| private final int startOffset; |
| private final int endOffset; |
| |
| |
| /** |
| * @param startOffset the starting offset, inclusive |
| * @param endOffset the ending offset, exclusive |
| */ |
| public BasicTextRegion(final int startOffset, final int endOffset) { |
| if (startOffset > endOffset) { |
| throw new IllegalArgumentException("startOffset > endOffset: startOffset= " + startOffset + ", endOffset= " + endOffset); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| this.startOffset= startOffset; |
| this.endOffset= endOffset; |
| } |
| |
| public BasicTextRegion(final int offset) { |
| this.startOffset= offset; |
| this.endOffset= offset; |
| } |
| |
| public BasicTextRegion(final TextRegion region) { |
| this(region.getStartOffset(), region.getEndOffset()); |
| } |
| |
| |
| @Override |
| public final int getStartOffset() { |
| return this.startOffset; |
| } |
| |
| @Override |
| public final int getEndOffset() { |
| return this.endOffset; |
| } |
| |
| @Override |
| public final int getLength() { |
| return this.endOffset - this.startOffset; |
| } |
| |
| |
| @Override |
| public int hashCode() { |
| return (this.startOffset << 24) | (getLength() << 16); |
| } |
| |
| protected boolean equalsByOffsets(final TextRegion other) { |
| return (this.startOffset == other.getStartOffset() |
| && this.endOffset == other.getEndOffset() ); |
| } |
| |
| @Override |
| public boolean equals(final @Nullable Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof TextRegion) { |
| return equalsByOffsets((TextRegion) obj); |
| } |
| return false; |
| } |
| |
| |
| protected final void appendIntervalString(final StringBuilder sb) { |
| sb.append('['); |
| sb.append(this.startOffset); |
| sb.append(','); |
| sb.append(this.endOffset); |
| sb.append(')'); |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuilder sb= new StringBuilder(); |
| appendIntervalString(sb); |
| return sb.toString(); |
| } |
| |
| } |