1 /** 2 * Copyright (c) 2008, http://www.snakeyaml.org 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 org.yaml.snakeyaml.error; 17 18 import org.yaml.snakeyaml.scanner.Constant; 19 20 /** 21 * It's just a record and its only use is producing nice error messages. Parser 22 * does not use it for any other purposes. 23 */ 24 public final class Mark { 25 private String name; 26 private int index; 27 private int line; 28 private int column; 29 private String buffer; 30 private int pointer; 31 32 public Mark(String name, int index, int line, int column, String buffer, int pointer) { 33 super(); 34 this.name = name; 35 this.index = index; 36 this.line = line; 37 this.column = column; 38 this.buffer = buffer; 39 this.pointer = pointer; 40 } 41 42 private boolean isLineBreak(char ch) { 43 return Constant.NULL_OR_LINEBR.has(ch); 44 } 45 46 public String get_snippet(int indent, int max_length) { 47 if (buffer == null) { 48 return null; 49 } 50 float half = max_length / 2 - 1; 51 int start = pointer; 52 String head = ""; 53 while ((start > 0) && !isLineBreak(buffer.charAt(start - 1))) { 54 start -= 1; 55 if (pointer - start > half) { 56 head = " ... "; 57 start += 5; 58 break; 59 } 60 } 61 String tail = ""; 62 int end = pointer; 63 while ((end < buffer.length()) && !isLineBreak(buffer.charAt(end))) { 64 end += 1; 65 if (end - pointer > half) { 66 tail = " ... "; 67 end -= 5; 68 break; 69 } 70 } 71 String snippet = buffer.substring(start, end); 72 StringBuilder result = new StringBuilder(); 73 for (int i = 0; i < indent; i++) { 74 result.append(" "); 75 } 76 result.append(head); 77 result.append(snippet); 78 result.append(tail); 79 result.append("\n"); 80 for (int i = 0; i < indent + pointer - start + head.length(); i++) { 81 result.append(" "); 82 } 83 result.append("^"); 84 return result.toString(); 85 } 86 87 public String get_snippet() { 88 return get_snippet(4, 75); 89 } 90 91 @Override 92 public String toString() { 93 String snippet = get_snippet(); 94 StringBuilder where = new StringBuilder(" in "); 95 where.append(name); 96 where.append(", line "); 97 where.append(line + 1); 98 where.append(", column "); 99 where.append(column + 1); 100 if (snippet != null) { 101 where.append(":\n"); 102 where.append(snippet); 103 } 104 return where.toString(); 105 } 106 107 public String getName() { 108 return name; 109 } 110 111 /** 112 * starts with 0 113 */ 114 public int getLine() { 115 return line; 116 } 117 118 /** 119 * starts with 0 120 */ 121 public int getColumn() { 122 return column; 123 } 124 125 /** 126 * starts with 0 127 */ 128 public int getIndex() { 129 return index; 130 } 131 132 } 133
