Ben Dodson | 920dbbb | 2010-08-04 15:21:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 Google Inc. |
| 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 | |
| 17 | package com.google.doclava; |
| 18 | |
| 19 | public class SourcePositionInfo implements Comparable { |
| 20 | public static final SourcePositionInfo UNKNOWN = new SourcePositionInfo("(unknown)", 0, 0); |
| 21 | |
| 22 | public SourcePositionInfo(String file, int line, int column) { |
| 23 | this.file = file; |
| 24 | this.line = line; |
| 25 | this.column = column; |
| 26 | } |
| 27 | |
| 28 | public SourcePositionInfo(SourcePositionInfo that) { |
| 29 | this.file = that.file; |
| 30 | this.line = that.line; |
| 31 | this.column = that.column; |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * Given this position and str which occurs at that position, as well as str an index into str, |
| 36 | * find the SourcePositionInfo. |
| 37 | * |
| 38 | * @throw StringIndexOutOfBoundsException if index > str.length() |
| 39 | */ |
| 40 | public static SourcePositionInfo add(SourcePositionInfo that, String str, int index) { |
| 41 | if (that == null) { |
| 42 | return null; |
| 43 | } |
| 44 | int line = that.line; |
| 45 | char prev = 0; |
| 46 | for (int i = 0; i < index; i++) { |
| 47 | char c = str.charAt(i); |
| 48 | if (c == '\r' || (c == '\n' && prev != '\r')) { |
| 49 | line++; |
| 50 | } |
| 51 | prev = c; |
| 52 | } |
| 53 | return new SourcePositionInfo(that.file, line, 0); |
| 54 | } |
| 55 | |
| 56 | public static SourcePositionInfo findBeginning(SourcePositionInfo that, String str) { |
| 57 | if (that == null) { |
| 58 | return null; |
| 59 | } |
| 60 | int line = that.line - 1; // -1 because, well, it seems to work |
| 61 | int prev = 0; |
| 62 | for (int i = str.length() - 1; i >= 0; i--) { |
| 63 | char c = str.charAt(i); |
| 64 | if ((c == '\r' && prev != '\n') || (c == '\n')) { |
| 65 | line--; |
| 66 | } |
| 67 | prev = c; |
| 68 | } |
| 69 | return new SourcePositionInfo(that.file, line, 0); |
| 70 | } |
| 71 | |
| 72 | @Override |
| 73 | public String toString() { |
| 74 | return file + ':' + line; |
| 75 | } |
| 76 | |
| 77 | public int compareTo(Object o) { |
| 78 | SourcePositionInfo that = (SourcePositionInfo) o; |
| 79 | int r = this.file.compareTo(that.file); |
| 80 | if (r != 0) return r; |
| 81 | return this.line - that.line; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Build a SourcePositionInfo from the XML source= notation |
| 86 | */ |
| 87 | public static SourcePositionInfo fromXml(String source) { |
| 88 | if (source != null) { |
| 89 | for (int i = 0; i < source.length(); i++) { |
| 90 | if (source.charAt(i) == ':') { |
| 91 | return new SourcePositionInfo(source.substring(0, i), Integer.parseInt(source |
| 92 | .substring(i + 1)), 0); |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | return UNKNOWN; |
| 98 | } |
| 99 | |
| 100 | public String file; |
| 101 | public int line; |
| 102 | public int column; |
| 103 | } |