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pause.js
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119 lines (106 loc) · 3.31 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 type { Pause, Frame, Location } from "../types";
import { get } from "lodash";
import { getScopes } from "../workers/parser";
// eslint-disable-next-line max-len
import { updateScopeBindings as coreUpdateScopeBindings } from "devtools-map-bindings/src/updateScopeBindings";
import type {
MappedScopeBindings,
Scope,
SourceId,
SourceScope,
Why
} from "debugger-html";
export function updateFrameLocations(
frames: Frame[],
sourceMaps: any
): Promise<Frame[]> {
if (!frames || frames.length == 0) {
return Promise.resolve(frames);
}
return Promise.all(
frames.map(frame =>
sourceMaps.getOriginalLocation(frame.location).then(loc => ({
...frame,
location: loc,
generatedLocation: frame.location
}))
)
);
}
type UpdateScopeBindingsContextArg = {
getLocationScopes: (
location: Location,
astScopes: ?(SourceScope[])
) => Promise<MappedScopeBindings[] | null>,
loadSourceText: (sourceId: SourceId) => Promise<any>
};
export async function updateScopeBindings(
scope: ?Scope,
generatedLocation: Location,
originalLocation: Location,
{ getLocationScopes, loadSourceText }: UpdateScopeBindingsContextArg
): Promise<?Scope> {
return coreUpdateScopeBindings(scope, generatedLocation, originalLocation, {
async getSourceMapsScopes(location) {
const astScopes: ?(SourceScope[]) = await getScopes(location);
return getLocationScopes(location, astScopes);
},
async getOriginalSourceScopes(location) {
await loadSourceText(location.sourceId);
return getScopes(location);
}
});
}
// Map protocol pause "why" reason to a valid L10N key
// These are the known unhandled reasons:
// "breakpointConditionThrown", "clientEvaluated"
// "interrupted", "attached"
const reasons = {
debuggerStatement: "whyPaused.debuggerStatement",
breakpoint: "whyPaused.breakpoint",
exception: "whyPaused.exception",
resumeLimit: "whyPaused.resumeLimit",
pauseOnDOMEvents: "whyPaused.pauseOnDOMEvents",
breakpointConditionThrown: "whyPaused.breakpointConditionThrown",
// V8
DOM: "whyPaused.breakpoint",
EventListener: "whyPaused.pauseOnDOMEvents",
XHR: "whyPaused.xhr",
promiseRejection: "whyPaused.promiseRejection",
assert: "whyPaused.assert",
debugCommand: "whyPaused.debugCommand",
other: "whyPaused.other"
};
export function getPauseReason(pauseInfo: Pause): string | null {
if (!pauseInfo) {
return null;
}
const reasonType = get(pauseInfo, "why.type", null);
if (!reasons[reasonType]) {
console.log("Please file an issue: reasonType=", reasonType);
}
return reasons[reasonType];
}
export async function getPausedPosition(pauseInfo: Pause, sourceMaps: any) {
let { frames } = pauseInfo;
frames = await updateFrameLocations(frames, sourceMaps);
const frame = frames[0];
const { location } = frame;
return location;
}
export function inDebuggerEval(why: ?Why) {
if (
why &&
why.type === "exception" &&
why.exception &&
why.exception.preview &&
why.exception.preview.fileName
) {
return why.exception.preview.fileName === "debugger eval code";
}
return false;
}