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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 {
getHiddenBreakpoint,
isEvaluatingExpression,
getSelectedFrame,
getThreadContext,
} from "../../selectors";
import { mapFrames, fetchFrames } from ".";
import { removeBreakpoint } from "../breakpoints";
import { evaluateExpressions } from "../expressions";
import { selectLocation } from "../sources";
import assert from "../../utils/assert";
import { fetchScopes } from "./fetchScopes";
/**
* Debugger has just paused
*
* @param {object} pauseInfo
* @memberof actions/pause
* @static
*/
export function paused(pauseInfo) {
return async function ({ dispatch, getState }) {
const { thread, frame, why } = pauseInfo;
dispatch({ type: "PAUSED", thread, why, frame });
// Get a context capturing the newly paused and selected thread.
const cx = getThreadContext(getState());
// Note that this is a rethorical assertion as threadcx.thread is updated by PAUSED action
assert(cx.thread == thread, "Thread mismatch");
// When we use "continue to here" feature we register an "hidden" breakpoint
// that should be removed on the next paused, even if we didn't hit it and
// paused for any other reason.
const hiddenBreakpoint = getHiddenBreakpoint(getState());
if (hiddenBreakpoint) {
dispatch(removeBreakpoint(cx, hiddenBreakpoint));
}
// The THREAD_STATE's "paused" resource only passes the top level stack frame,
// we dispatch the PAUSED action with it so that we can right away
// display it and update the UI to be paused.
// But we then fetch all the other frames:
await dispatch(fetchFrames(cx));
// And map them to original source locations.
// Note that this will wait for all related original sources to be loaded in the reducers.
// So this step may pause for a little while.
await dispatch(mapFrames(cx));
// If we paused on a particular frame, automatically select the related source
// and highlight the paused line
const selectedFrame = getSelectedFrame(getState(), thread);
if (selectedFrame) {
await dispatch(selectLocation(cx, selectedFrame.location));
}
// Fetch the previews for variables visible in the currently selected paused stackframe
await dispatch(fetchScopes(cx));
// 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(), thread)) {
await dispatch(evaluateExpressions(cx));
}
};
}
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