platform/platform-impl/src/com/intellij/openapi/editor/impl/LineIteratorImpl.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.openapi.editor.impl;
  17
  18 import com.intellij.openapi.editor.ex.LineIterator;
  19
  20 /**
  21  *
  22  */
  23 public class LineIteratorImpl implements LineIterator {
  24   private int myLineIndex = 0;
  25   private final LineSet myLineSet;
  26
  27   LineIteratorImpl(LineSet lineSet) {
  28     myLineSet = lineSet;
  29   }
  30
  31   public void start(int startOffset) {
  32     myLineIndex = myLineSet.findLineIndex(startOffset);
  33   }
  34
  35   public int getStart() {
  36     return myLineSet.getLineStart(myLineIndex);
  37   }
  38
  39   public int getEnd() {
  40     return myLineSet.getLineEnd(myLineIndex);
  41   }
  42
  43   public int getSeparatorLength() {
  44     return myLineSet.getSeparatorLength(myLineIndex);
  45   }
  46
  47   public int getLineNumber() {
  48     return myLineIndex;
  49   }
  50
  51   public void advance() {
  52     myLineIndex++;
  53   }
  54
  55   public boolean atEnd() {
  56     return myLineIndex >= myLineSet.getLineCount() || myLineIndex < 0;
  57   }
  58
  59
  60 }