| /* |
| * 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 org.jetbrains.annotations.NotNull; |
| |
| /** |
| * @author max |
| */ |
| public class MergingCharSequence implements CharSequence { |
| private final CharSequence s1; |
| private final CharSequence s2; |
| |
| public MergingCharSequence(final CharSequence s1, final CharSequence s2) { |
| this.s1 = s1; |
| this.s2 = s2; |
| } |
| |
| @Override |
| public int length() { |
| return s1.length() + s2.length(); |
| } |
| |
| @Override |
| public char charAt(int index) { |
| if (index < s1.length()) return s1.charAt(index); |
| return s2.charAt(index - s1.length()); |
| } |
| |
| @Override |
| public CharSequence subSequence(int start, int end) { |
| if (start < s1.length() && end < s1.length()) return s1.subSequence(start, end); |
| if (start >= s1.length() && end >= s1.length()) return s2.subSequence(start - s1.length(), end - s1.length()); |
| return new MergingCharSequence(s1.subSequence(start, s1.length()), s2.subSequence(0, end - s1.length())); |
| } |
| |
| @NotNull |
| public String toString() { |
| return s1.toString() + s2.toString(); |
| } |
| } |