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