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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/. */
"use strict";
const { Actor } = require("resource://devtools/shared/protocol.js");
const {
preferenceSpec,
} = require("resource://devtools/shared/specs/preference.js");
const { PREF_STRING, PREF_INT, PREF_BOOL } = Services.prefs;
function ensurePrefType(name, expectedType) {
const type = Services.prefs.getPrefType(name);
if (type !== expectedType) {
throw new Error(`preference is not of the right type: ${name}`);
}
}
/**
* Normally the preferences are set using Services.prefs, but this actor allows
* a devtools client to set preferences on the debuggee. This is particularly useful
* when remote debugging, and the preferences should persist to the remote target
* and not to the client. If used for a local target, it effectively behaves the same
* as using Services.prefs.
*
* This actor is used as a global-scoped actor, targeting the entire browser, not an
* individual tab.
*/
class PreferenceActor extends Actor {
constructor(conn) {
super(conn, preferenceSpec);
}
getTraits() {
// The *Pref traits are used to know if remote-debugging bugs related to
// specific preferences are fixed on the server or if the client should set
// default values for them. See the about:debugging module
// runtime-default-preferences.js
return {};
}
getBoolPref(name) {
ensurePrefType(name, PREF_BOOL);
return Services.prefs.getBoolPref(name);
}
getCharPref(name) {
ensurePrefType(name, PREF_STRING);
return Services.prefs.getCharPref(name);
}
getIntPref(name) {
ensurePrefType(name, PREF_INT);
return Services.prefs.getIntPref(name);
}
getAllPrefs() {
const prefs = {};
Services.prefs.getChildList("").forEach(function (name) {
// append all key/value pairs into a huge json object.
try {
let value;
switch (Services.prefs.getPrefType(name)) {
case PREF_STRING:
value = Services.prefs.getCharPref(name);
break;
case PREF_INT:
value = Services.prefs.getIntPref(name);
break;
case PREF_BOOL:
value = Services.prefs.getBoolPref(name);
break;
default:
}
prefs[name] = {
value,
hasUserValue: Services.prefs.prefHasUserValue(name),
};
} catch (e) {
// pref exists but has no user or default value
}
});
return prefs;
}
setBoolPref(name, value) {
Services.prefs.setBoolPref(name, value);
Services.prefs.savePrefFile(null);
}
setCharPref(name, value) {
Services.prefs.setCharPref(name, value);
Services.prefs.savePrefFile(null);
}
setIntPref(name, value) {
Services.prefs.setIntPref(name, value);
Services.prefs.savePrefFile(null);
}
clearUserPref(name) {
Services.prefs.clearUserPref(name);
Services.prefs.savePrefFile(null);
}
}
exports.PreferenceActor = PreferenceActor;
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