function.js - mozsearch

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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/>. */

import { isFulfilled } from "./async-value";

import { findClosestFunction } from "./ast";

import { correctIndentation } from "./indentation";

export function findFunctionText(line, source, sourceTextContent, symbols) {

  const func = findClosestFunction(symbols, {

    sourceId: source.id,

    line,

    column: Infinity,

});

  if (

    source.isWasm ||

    !func ||

    !sourceTextContent ||

    !isFulfilled(sourceTextContent) ||

    sourceTextContent.value.type !== "text"

) {

    return null;

  const {

    location: { start, end },

  } = func;

  const lines = sourceTextContent.value.value.split("\n");

  const firstLine = lines[start.line - 1].slice(start.column);

  const lastLine = lines[end.line - 1].slice(0, end.column);

  const middle = lines.slice(start.line, end.line - 1);

  const functionText = [firstLine, ...middle, lastLine].join("\n");

  const indentedFunctionText = correctIndentation(functionText);

  return indentedFunctionText;