| 'use strict'; |
| |
| |
| var common = require('./common'); |
| |
| |
| function Mark(name, buffer, position, line, column) { |
| this.name = name; |
| this.buffer = buffer; |
| this.position = position; |
| this.line = line; |
| this.column = column; |
| } |
| |
| |
| Mark.prototype.getSnippet = function getSnippet(indent, maxLength) { |
| var head, start, tail, end, snippet; |
| |
| if (!this.buffer) return null; |
| |
| indent = indent || 4; |
| maxLength = maxLength || 75; |
| |
| head = ''; |
| start = this.position; |
| |
| while (start > 0 && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(start - 1)) === -1) { |
| start -= 1; |
| if (this.position - start > (maxLength / 2 - 1)) { |
| head = ' ... '; |
| start += 5; |
| break; |
| } |
| } |
| |
| tail = ''; |
| end = this.position; |
| |
| while (end < this.buffer.length && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(end)) === -1) { |
| end += 1; |
| if (end - this.position > (maxLength / 2 - 1)) { |
| tail = ' ... '; |
| end -= 5; |
| break; |
| } |
| } |
| |
| snippet = this.buffer.slice(start, end); |
| |
| return common.repeat(' ', indent) + head + snippet + tail + '\n' + |
| common.repeat(' ', indent + this.position - start + head.length) + '^'; |
| }; |
| |
| |
| Mark.prototype.toString = function toString(compact) { |
| var snippet, where = ''; |
| |
| if (this.name) { |
| where += 'in "' + this.name + '" '; |
| } |
| |
| where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1); |
| |
| if (!compact) { |
| snippet = this.getSnippet(); |
| |
| if (snippet) { |
| where += ':\n' + snippet; |
| } |
| } |
| |
| return where; |
| }; |
| |
| |
| module.exports = Mark; |