1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/* 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 { RemoteError } from "chrome://remote/content/shared/RemoteError.sys.mjs";
class MessageHandlerError extends RemoteError {
/**
* @param {(string|Error)=} x
* Optional string describing error situation or Error instance
* to propagate.
*/
constructor(x) {
super(x);
this.name = this.constructor.name;
this.status = "message handler error";
// Error's ctor does not preserve x' stack
if (typeof x?.stack !== "undefined") {
this.stack = x.stack;
}
}
get isMessageHandlerError() {
return true;
}
/**
* @returns {Object<string, string>}
* JSON serialisation of error prototype.
*/
toJSON() {
return {
error: this.status,
message: this.message || "",
stacktrace: this.stack || "",
};
}
/**
* Unmarshals a JSON error representation to the appropriate MessageHandler
* error type.
*
* @param {Object<string, string>} json
* Error object.
*
* @returns {Error}
* Error prototype.
*/
static fromJSON(json) {
if (typeof json.error == "undefined") {
let s = JSON.stringify(json);
throw new TypeError("Undeserialisable error type: " + s);
}
if (!STATUSES.has(json.error)) {
throw new TypeError("Not of MessageHandlerError descent: " + json.error);
}
let cls = STATUSES.get(json.error);
let err = new cls();
if ("message" in json) {
err.message = json.message;
}
if ("stacktrace" in json) {
err.stack = json.stacktrace;
}
return err;
}
}
/**
* A command could not be handled by the message handler network.
*/
class UnsupportedCommandError extends MessageHandlerError {
constructor(message) {
super(message);
this.status = "unsupported message handler command";
}
}
const STATUSES = new Map([
["message handler error", MessageHandlerError],
["unsupported message handler command", UnsupportedCommandError],
]);
/** @namespace */
export const error = {
MessageHandlerError,
UnsupportedCommandError,
};
|
