"use strict";
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const util = require("util");
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const idlUtils = require("../generated/utils");
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const ErrorEvent = require("../generated/ErrorEvent");
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const errorReportingMode = Symbol("error reporting mode");
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// https://html.spec.whatwg.org/multipage/webappapis.html#report-the-error
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// Omits script parameter and any check for muted errors.
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// Takes target as an EventTarget impl.
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// Takes error object, message, and location as params, unlike the spec.
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// Returns whether the event was handled or not.
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function reportAnError(line, col, target, errorObject, message, location) {
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if (target[errorReportingMode]) {
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return false;
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}
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target[errorReportingMode] = true;
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// TODO Events: use constructor directly, once they are no longer tied to a window.
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const event = ErrorEvent.createImpl([
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"error",
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{
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bubbles: false,
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cancelable: true,
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message,
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filename: location,
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lineno: line,
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colno: col,
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error: errorObject
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}
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]);
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try {
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target.dispatchEvent(event);
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} finally {
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target[errorReportingMode] = false;
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return event.defaultPrevented;
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}
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}
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module.exports = function reportException(window, error, filenameHint) {
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// This function will give good results on real Error objects with stacks; poor ones otherwise
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const stack = error && error.stack;
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const lines = stack && stack.split("\n");
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// Find the first line that matches; important for multi-line messages
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let pieces;
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if (lines) {
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for (let i = 1; i < lines.length && !pieces; ++i) {
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pieces = lines[i].match(/at (?:(.+)\s+)?\(?(?:(.+?):(\d+):(\d+)|([^)]+))\)?/);
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}
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}
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const fileName = (pieces && pieces[2]) || filenameHint || window._document.URL;
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const lineNumber = (pieces && parseInt(pieces[3])) || 0;
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const columnNumber = (pieces && parseInt(pieces[4])) || 0;
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const windowImpl = idlUtils.implForWrapper(window);
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const handled = reportAnError(lineNumber, columnNumber, windowImpl, error, error.message, fileName);
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if (!handled) {
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const errorString = shouldBeDisplayedAsError(error) ? `[${error.name}: ${error.message}]` : util.inspect(error);
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const jsdomError = new Error(`Uncaught ${errorString}`);
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jsdomError.detail = error;
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jsdomError.type = "unhandled exception";
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window._virtualConsole.emit("jsdomError", jsdomError);
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}
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};
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function shouldBeDisplayedAsError(x) {
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return x.name && x.message !== undefined && x.stack;
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}
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