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// Ported from js-yaml v3.13.1:
// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da
// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { repeat } from "./utils.ts";
export class Mark {
constructor(
public name: string,
public buffer: string,
public position: number,
public line: number,
public column: number,
) {}
public getSnippet(indent = 4, maxLength = 75): string | null {
if (!this.buffer) return null;
let head = "";
let 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;
}
}
let tail = "";
let 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;
}
}
const snippet = this.buffer.slice(start, end);
return `${repeat(" ", indent)}${head}${snippet}${tail}\n${
repeat(
" ",
indent + this.position - start + head.length,
)
}^`;
}
public toString(compact?: boolean): string {
let snippet,
where = "";
if (this.name) {
where += `in "${this.name}" `;
}
where += `at line ${this.line + 1}, column ${this.column + 1}`;
if (!compact) {
snippet = this.getSnippet();
if (snippet) {
where += `:\n${snippet}`;
}
}
return where;
}
}
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