| /* |
| * Copyright 2000-2013 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.util.text; |
| |
| import java.text.CharacterIterator; |
| |
| /** |
| * @author max |
| */ |
| public class CharSequenceCharacterIterator implements CharacterIterator { |
| private final CharSequence myChars; |
| private int myCurPosition; |
| |
| public CharSequenceCharacterIterator(final CharSequence chars) { |
| myChars = chars; |
| myCurPosition = 0; |
| } |
| |
| @Override |
| public char current() { |
| if (myCurPosition < 0) { |
| myCurPosition = 0; |
| return DONE; |
| } |
| |
| if (myCurPosition >= myChars.length()) { |
| myCurPosition = myChars.length(); |
| return DONE; |
| } |
| |
| return myChars.charAt(myCurPosition); |
| } |
| |
| @Override |
| public char first() { |
| myCurPosition = 0; |
| return current(); |
| } |
| |
| @Override |
| public char last() { |
| myCurPosition = myChars.length() - 1; |
| return current(); |
| } |
| |
| @Override |
| public char next() { |
| myCurPosition++; |
| return current(); |
| } |
| |
| @Override |
| public char previous() { |
| myCurPosition--; |
| return current(); |
| } |
| |
| @Override |
| public int getBeginIndex() { |
| return 0; |
| } |
| |
| @Override |
| public int getEndIndex() { |
| return myChars.length(); |
| } |
| |
| @Override |
| public int getIndex() { |
| return myCurPosition; |
| } |
| |
| @Override |
| public char setIndex(int position) { |
| if (position < 0 || position > myChars.length()) { |
| throw new IllegalArgumentException("Wrong index: " + position); |
| } |
| myCurPosition = position; |
| return current(); |
| } |
| |
| @Override |
| public Object clone() { |
| final CharSequenceCharacterIterator it = new CharSequenceCharacterIterator(myChars); |
| it.myCurPosition = myCurPosition; |
| return it; |
| } |
| } |