| /* |
| * Copyright 2000-2011 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.openapi.vcs.actions; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.util.text.StringUtil; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * @author irengrig |
| * Date: 4/27/11 |
| * Time: 3:42 PM |
| */ |
| public class ContentsLines { |
| private final static Logger LOG = Logger.getInstance("#com.intellij.openapi.vcs.actions.ContentsLines"); |
| |
| private final SplittingIterator mySplittingIterator; |
| private final List<Integer> myLinesStartOffsets; |
| private final String myContents; |
| private boolean myLineEndsFinished; |
| |
| public ContentsLines(final String contents) { |
| myContents = contents; |
| mySplittingIterator = new SplittingIterator(contents); |
| myLinesStartOffsets = new ArrayList<Integer>(); |
| } |
| |
| public String getLineContents(final int number) { |
| assert !myLineEndsFinished || myLinesStartOffsets.size() > number; |
| |
| // we need to know end |
| if (myLineEndsFinished || (myLinesStartOffsets.size() > (number + 1))) { |
| return extractCalculated(number); |
| } |
| while (((myLinesStartOffsets.size() - 1) < (number + 1)) && (!myLineEndsFinished) && mySplittingIterator.hasNext()) { |
| final Integer nextStart = mySplittingIterator.next(); |
| myLinesStartOffsets.add(nextStart); |
| } |
| myLineEndsFinished = myLinesStartOffsets.size() < (number + 1); |
| return extractCalculated(number); |
| } |
| |
| private String extractCalculated(int number) { |
| try { |
| String text = myContents.substring(myLinesStartOffsets.get(number), |
| (number + 1 >= myLinesStartOffsets.size()) |
| ? myContents.length() |
| : myLinesStartOffsets.get(number + 1)); |
| text = text.endsWith("\r\n") ? text.substring(0, text.length() - 2) : text; |
| text = (text.endsWith("\r") || text.endsWith("\n")) ? text.substring(0, text.length() - 1) : text; |
| return text; |
| } catch (IndexOutOfBoundsException e) { |
| LOG.error("Loaded contents lines: " + StringUtil.getLineBreakCount(myContents), e); |
| throw e; |
| } |
| } |
| |
| public boolean isLineEndsFinished() { |
| return myLineEndsFinished; |
| } |
| |
| public int getKnownLinesNumber() { |
| return myLineEndsFinished ? myLinesStartOffsets.size() : -1; |
| } |
| } |