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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { DiagnosticItem } from "../diagnostics.ts";
import { sendSync } from "./dispatch_json.ts";
/**
* Format an array of diagnostic items and return them as a single string.
* @param items An array of diagnostic items to format
*/
export function formatDiagnostics(items: DiagnosticItem[]): string {
return sendSync("op_format_diagnostic", { items });
}
export interface Location {
/** The full url for the module, e.g. `file://some/file.ts` or
* `https://some/file.ts`. */
filename: string;
/** The line number in the file. It is assumed to be 1-indexed. */
line: number;
/** The column number in the file. It is assumed to be 1-indexed. */
column: number;
}
/** Given a current location in a module, lookup the source location and
* return it.
*
* When Deno transpiles code, it keep source maps of the transpiled code. This
* function can be used to lookup the original location. This is automatically
* done when accessing the `.stack` of an error, or when an uncaught error is
* logged. This function can be used to perform the lookup for creating better
* error handling.
*
* **Note:** `line` and `column` are 1 indexed, which matches display
* expectations, but is not typical of most index numbers in Deno.
*
* An example:
*
* const orig = Deno.applySourceMap({
* location: "file://my/module.ts",
* line: 5,
* column: 15
* });
* console.log(`${orig.filename}:${orig.line}:${orig.column}`);
*
*/
export function applySourceMap(location: Location): Location {
const { filename, line, column } = location;
// On this side, line/column are 1 based, but in the source maps, they are
// 0 based, so we have to convert back and forth
const res = sendSync("op_apply_source_map", {
filename,
line: line - 1,
column: column - 1
});
return {
filename: res.filename,
line: res.line + 1,
column: res.column + 1
};
}
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