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empty-lines.js
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30 lines (24 loc) · 1011 Bytes
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
// @flow
import { xor, range } from "lodash";
import { getSelectedLocation } from "./source-maps";
import type { BreakpointPositions, Source } from "../types";
export function findEmptyLines(
source: Source,
breakpointPositions: BreakpointPositions
): number[] {
if (!breakpointPositions || source.isWasm) {
return [];
}
const sourceText = source.text || "";
const lineCount = sourceText.split("\n").length;
const sourceLines = range(1, lineCount + 1);
const breakpointLines = breakpointPositions
.map(point => getSelectedLocation(point, source).line)
// NOTE: at the moment it is possible the location is an unmapped generated
// line which could be greater than the line count.
.filter(line => line <= lineCount);
return xor(sourceLines, breakpointLines);
}