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pause.js
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100 lines (90 loc) · 2.55 KB
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// @flow
import type { Pause, Frame, Location } from "../types";
import { get } from "lodash";
import { getScopes } from "../workers/parser";
import type { Scope, MappedScopeBindings } 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
}))
)
);
}
function extendScope(
scope: ?Scope,
generatedScopes: MappedScopeBindings[],
index: number
): ?Scope {
if (!scope) {
return undefined;
}
if (index >= generatedScopes.length) {
return scope;
}
return Object.assign({}, scope, {
parent: extendScope(scope.parent, generatedScopes, index + 1),
sourceBindings: generatedScopes[index].bindings
});
}
export async function updateScopeBindings(
scope: any,
location: Location,
sourceMaps: any
) {
const astScopes = await getScopes(location);
const generatedScopes = await sourceMaps.getLocationScopes(
location,
astScopes
);
if (!generatedScopes) {
return scope;
}
return extendScope(scope, generatedScopes, 0);
}
// 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;
}