1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 var EXPORTED_SYMBOLS = ["AsyncPrefs"];
9 const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
11 const kInChildProcess =
12 Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT;
14 const kAllowedPrefs = new Set([
15 // NB: please leave the testing prefs at the top, and sort the rest alphabetically if you add
17 "testing.allowed-prefs.some-bool-pref",
18 "testing.allowed-prefs.some-char-pref",
19 "testing.allowed-prefs.some-int-pref",
26 "reader.color_scheme",
27 "reader.content_width",
30 "security.ssl.errorReporting.automatic",
31 "security.tls.version.enable-deprecated",
32 "browser.contentblocking.report.hide_lockwise_app",
33 "browser.contentblocking.report.show_mobile_app",
36 const kPrefTypeMap = new Map([
37 ["boolean", Services.prefs.PREF_BOOL],
38 ["number", Services.prefs.PREF_INT],
39 ["string", Services.prefs.PREF_STRING],
42 function maybeReturnErrorForReset(pref) {
43 if (!kAllowedPrefs.has(pref)) {
44 return `Resetting pref ${pref} from content is not allowed.`;
49 function maybeReturnErrorForSet(pref, value) {
50 if (!kAllowedPrefs.has(pref)) {
51 return `Setting pref ${pref} from content is not allowed.`;
54 let valueType = typeof value;
55 if (!kPrefTypeMap.has(valueType)) {
56 return `Can't set pref ${pref} to value of type ${valueType}.`;
58 let prefType = Services.prefs.getPrefType(pref);
60 prefType != Services.prefs.PREF_INVALID &&
61 prefType != kPrefTypeMap.get(valueType)
63 return `Can't set pref ${pref} to a value with type ${valueType} that doesn't match the pref's type ${prefType}.`;
69 if (kInChildProcess) {
71 let gMsgMap = new Map();
75 let error = maybeReturnErrorForSet(pref, value);
77 return Promise.reject(error);
80 let msgId = ++gUniqueId;
81 return new Promise((resolve, reject) => {
82 gMsgMap.set(msgId, { resolve, reject });
83 Services.cpmm.sendAsyncMessage("AsyncPrefs:SetPref", {
92 let error = maybeReturnErrorForReset(pref);
94 return Promise.reject(error);
97 let msgId = ++gUniqueId;
98 return new Promise((resolve, reject) => {
99 gMsgMap.set(msgId, { resolve, reject });
100 Services.cpmm.sendAsyncMessage("AsyncPrefs:ResetPref", { pref, msgId });
104 receiveMessage(msg) {
105 let promiseRef = gMsgMap.get(msg.data.msgId);
107 gMsgMap.delete(msg.data.msgId);
108 if (msg.data.success) {
109 promiseRef.resolve();
111 promiseRef.reject(msg.data.message);
117 Services.cpmm.addMessageListener("AsyncPrefs:PrefSetFinished", AsyncPrefs);
118 Services.cpmm.addMessageListener("AsyncPrefs:PrefResetFinished", AsyncPrefs);
122 number: "setIntPref",
123 boolean: "setBoolPref",
124 string: "setCharPref",
128 let error = maybeReturnErrorForSet(pref, value);
130 return Promise.reject(error);
132 let methodToUse = this.methodForType[typeof value];
134 Services.prefs[methodToUse](pref, value);
135 return Promise.resolve(value);
138 return Promise.reject(ex.message);
143 let error = maybeReturnErrorForReset(pref);
145 return Promise.reject(error);
149 Services.prefs.clearUserPref(pref);
150 return Promise.resolve();
153 return Promise.reject(ex.message);
157 receiveMessage(msg) {
158 if (msg.name == "AsyncPrefs:SetPref") {
161 this.onPrefReset(msg);
166 let { pref, msgId } = msg.data;
167 this.reset(pref).then(
169 msg.target.sendAsyncMessage("AsyncPrefs:PrefResetFinished", {
175 msg.target.sendAsyncMessage("AsyncPrefs:PrefResetFinished", {
185 let { pref, value, msgId } = msg.data;
186 this.set(pref, value).then(
188 msg.target.sendAsyncMessage("AsyncPrefs:PrefSetFinished", {
194 msg.target.sendAsyncMessage("AsyncPrefs:PrefSetFinished", {
204 // PLEASE KEEP THIS LIST IN SYNC WITH THE LISTENERS ADDED IN nsBrowserGlue
205 Services.ppmm.addMessageListener("AsyncPrefs:SetPref", this);
206 Services.ppmm.addMessageListener("AsyncPrefs:ResetPref", this);
207 // PLEASE KEEP THIS LIST IN SYNC WITH THE LISTENERS ADDED IN nsBrowserGlue