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paused.js
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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 {
getHiddenBreakpoint,
isEvaluatingExpression,
getSelectedFrame,
getSources,
getLastCommand,
wasStepping
} from "../../selectors";
import { mapFrames } from ".";
import { removeBreakpoint } from "../breakpoints";
import { evaluateExpressions } from "../expressions";
import { selectLocation } from "../sources";
import { loadSourceText } from "../sources/loadSourceText";
import { togglePaneCollapse } from "../ui";
import { command } from "./commands";
import { shouldStep } from "../../utils/pause";
import { updateFrameLocation } from "./mapFrames";
import { fetchScopes } from "./fetchScopes";
import type { Pause, Frame } from "../../types";
import type { ThunkArgs } from "../types";
async function getOriginalSourceForFrame(state, frame: Frame) {
return getSources(state)[frame.location.sourceId];
}
/**
* Debugger has just paused
*
* @param {object} pauseInfo
* @memberof actions/pause
* @static
*/
export function paused(pauseInfo: Pause) {
return async function({ dispatch, getState, client, sourceMaps }: ThunkArgs) {
const { thread, frames, why, loadedObjects } = pauseInfo;
const topFrame = frames.length > 0 ? frames[0] : null;
// NOTE: do not step when leaving a frame or paused at a debugger statement
if (topFrame && !why.frameFinished && why.type == "resumeLimit") {
const mappedFrame = await updateFrameLocation(topFrame, sourceMaps);
const source = await getOriginalSourceForFrame(getState(), mappedFrame);
// Ensure that the original file has loaded if there is one.
await dispatch(loadSourceText(source));
if (shouldStep(mappedFrame, getState(), sourceMaps)) {
// When stepping past a location we shouldn't pause at according to the
// source map, make sure we continue stepping in the same direction we
// were going previously.
const rewind = getLastCommand(getState(), thread) == "reverseStepOver";
dispatch(command(rewind ? "reverseStepOver" : "stepOver"));
return;
}
}
dispatch({
type: "PAUSED",
thread,
why,
frames,
selectedFrameId: topFrame ? topFrame.id : undefined,
loadedObjects: loadedObjects || []
});
const hiddenBreakpoint = getHiddenBreakpoint(getState());
if (hiddenBreakpoint) {
dispatch(removeBreakpoint(hiddenBreakpoint));
}
await dispatch(mapFrames());
const selectedFrame = getSelectedFrame(getState());
if (selectedFrame) {
await dispatch(selectLocation(selectedFrame.location));
}
if (!wasStepping(getState())) {
dispatch(togglePaneCollapse("end", false));
}
await dispatch(fetchScopes());
// Run after fetching scoping data so that it may make use of the sourcemap
// expression mappings for local variables.
const atException = why.type == "exception";
if (!atException || !isEvaluatingExpression(getState())) {
await dispatch(evaluateExpressions());
}
};
}