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stepping.js
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46 lines (38 loc) · 1.34 KB
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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 { isEqual } from "lodash";
import { isOriginalId } from "devtools-source-map";
import type { Frame } from "../../types";
import type { State } from "../../reducers/types";
import {
getSelectedSource,
getPreviousPauseFrameLocation
} from "../../selectors";
import { isInvalidPauseLocation } from "../../workers/parser";
export async function shouldStep(
rootFrame: ?Frame,
state: State,
sourceMaps: any
) {
if (!rootFrame) {
return false;
}
const selectedSource = getSelectedSource(state);
const previousFrameInfo = getPreviousPauseFrameLocation(state);
let previousFrameLoc;
let currentFrameLoc;
if (selectedSource && isOriginalId(selectedSource.get("id"))) {
currentFrameLoc = rootFrame.location;
previousFrameLoc = previousFrameInfo && previousFrameInfo.location;
} else {
currentFrameLoc = rootFrame.generatedLocation;
previousFrameLoc = previousFrameInfo && previousFrameInfo.generatedLocation;
}
return (
isOriginalId(currentFrameLoc.sourceId) &&
((previousFrameLoc && isEqual(previousFrameLoc, currentFrameLoc)) ||
(await isInvalidPauseLocation(currentFrameLoc)))
);
}