| #if FEATURE_BREAKITERATOR |
| using ICU4N.Text; |
| using System; |
| using ICU4N.Support.Text; |
| |
| namespace Lucene.Net.Search.PostingsHighlight |
| { |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| /// <summary>Just produces one single fragment for the entire text</summary> |
| public sealed class WholeBreakIterator : BreakIterator |
| { |
| private CharacterIterator text; |
| private int start; |
| private int end; |
| private int current; |
| |
| public override int Current => current; |
| |
| public override int First() |
| { |
| return (current = start); |
| } |
| |
| public override int Following(int pos) |
| { |
| if (pos < start || pos > end) |
| { |
| throw new ArgumentException("offset out of bounds"); |
| } |
| else if (pos == end) |
| { |
| // this conflicts with the javadocs, but matches actual behavior (Oracle has a bug in something) |
| // http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=9000909 |
| current = end; |
| return Done; |
| } |
| else |
| { |
| return Last(); |
| } |
| } |
| |
| public override CharacterIterator Text => text; |
| |
| public override int Last() |
| { |
| return (current = end); |
| } |
| |
| public override int Next() |
| { |
| if (current == end) |
| { |
| return Done; |
| } |
| else |
| { |
| return Last(); |
| } |
| } |
| |
| public override int Next(int n) |
| { |
| if (n < 0) |
| { |
| for (int i = 0; i < -n; i++) |
| { |
| Previous(); |
| } |
| } |
| else |
| { |
| for (int i = 0; i < n; i++) |
| { |
| Next(); |
| } |
| } |
| return Current; |
| } |
| |
| public override int Preceding(int pos) |
| { |
| if (pos < start || pos > end) |
| { |
| throw new ArgumentException("offset out of bounds"); |
| } |
| else if (pos == start) |
| { |
| // this conflicts with the javadocs, but matches actual behavior (Oracle has a bug in something) |
| // http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=9000909 |
| current = start; |
| return Done; |
| } |
| else |
| { |
| return First(); |
| } |
| } |
| |
| public override int Previous() |
| { |
| if (current == start) |
| { |
| return Done; |
| } |
| else |
| { |
| return First(); |
| } |
| } |
| |
| public override bool IsBoundary(int offset) |
| { |
| if (offset == 0) |
| { |
| return true; |
| } |
| int boundary = Following(offset - 1); |
| if (boundary == Done) |
| { |
| throw new ArgumentException(); |
| } |
| return boundary == offset; |
| } |
| |
| public override void SetText(CharacterIterator newText) |
| { |
| start = newText.BeginIndex; |
| end = newText.EndIndex; |
| text = newText; |
| current = start; |
| } |
| } |
| } |
| #endif |