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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";
var EXPORTED_SYMBOLS = ["AsyncPrefs", "AsyncPrefsChild", "AsyncPrefsParent"];
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
const kInChildProcess =
Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT;
const kAllowedPrefs = new Set([
// NB: please leave the testing prefs at the top, and sort the rest alphabetically if you add
// anything.
"testing.allowed-prefs.some-bool-pref",
"testing.allowed-prefs.some-char-pref",
"testing.allowed-prefs.some-int-pref",
"browser.contentblocking.report.hide_vpn_banner",
"browser.contentblocking.report.show_mobile_app",
"narrate.rate",
"narrate.voice",
"pdfjs.cursorToolOnLoad",
"pdfjs.database",
"pdfjs.defaultZoomValue",
"pdfjs.disablePageLabels",
"pdfjs.enabledCache.state",
"pdfjs.enablePermissions",
"pdfjs.enablePrintAutoRotate",
"pdfjs.enableWebGL",
"pdfjs.externalLinkTarget",
"pdfjs.historyUpdateUrl",
"pdfjs.ignoreDestinationZoom",
"pdfjs..migrationVersion",
"pdfjs.pdfBugEnabled",
"pdfjs.previousHandler.alwaysAskBeforeHandling",
"pdfjs.previousHandler.preferredAction",
"pdfjs.renderer",
"pdfjs.renderInteractiveForms",
"pdfjs.sidebarViewOnLoad",
"pdfjs.scrollModeOnLoad",
"pdfjs.spreadModeOnLoad",
"pdfjs.textLayerMode",
"pdfjs.useOnlyCssZoom",
"pdfjs.viewOnLoad",
"pdfjs.disableAutoFetch",
"pdfjs.disableFontFace",
"pdfjs.disableRange",
"pdfjs.disableStream",
"reader.font_size",
"reader.font_type",
"reader.color_scheme",
"reader.content_width",
"reader.line_height",
"security.tls.version.enable-deprecated",
"security.xfocsp.errorReporting.automatic",
]);
const kPrefTypeMap = new Map([
["boolean", Services.prefs.PREF_BOOL],
["number", Services.prefs.PREF_INT],
["string", Services.prefs.PREF_STRING],
]);
function maybeReturnErrorForReset(pref) {
if (!kAllowedPrefs.has(pref)) {
return `Resetting pref ${pref} from content is not allowed.`;
}
return false;
}
function maybeReturnErrorForSet(pref, value) {
if (!kAllowedPrefs.has(pref)) {
return `Setting pref ${pref} from content is not allowed.`;
}
let valueType = typeof value;
if (!kPrefTypeMap.has(valueType)) {
return `Can't set pref ${pref} to value of type ${valueType}.`;
}
let prefType = Services.prefs.getPrefType(pref);
if (
prefType != Services.prefs.PREF_INVALID &&
prefType != kPrefTypeMap.get(valueType)
) {
return `Can't set pref ${pref} to a value with type ${valueType} that doesn't match the pref's type ${prefType}.`;
}
return false;
}
class AsyncPrefsChild extends JSProcessActorChild {
set(pref, value) {
let error = maybeReturnErrorForSet(pref, value);
if (error) {
return Promise.reject(error);
}
return this.sendQuery("AsyncPrefs:SetPref", {
pref,
value,
});
}
reset(pref) {
let error = maybeReturnErrorForReset(pref);
if (error) {
return Promise.reject(error);
}
return this.sendQuery("AsyncPrefs:ResetPref", { pref });
}
}
var AsyncPrefs = {
set(pref, value) {
if (kInChildProcess) {
return ChromeUtils.domProcessChild
.getActor("AsyncPrefs")
.set(pref, value);
}
return AsyncPrefsParent.set(pref, value);
},
reset(pref, value) {
if (kInChildProcess) {
return ChromeUtils.domProcessChild.getActor("AsyncPrefs").reset(pref);
}
return AsyncPrefsParent.reset(pref);
},
};
const methodForType = {
number: "setIntPref",
boolean: "setBoolPref",
string: "setCharPref",
};
class AsyncPrefsParent extends JSProcessActorParent {
static set(pref, value) {
let error = maybeReturnErrorForSet(pref, value);
if (error) {
return Promise.reject(error);
}
let methodToUse = methodForType[typeof value];
try {
Services.prefs[methodToUse](pref, value);
} catch (ex) {
Cu.reportError(ex);
return Promise.reject(ex.message);
}
return Promise.resolve(value);
}
static reset(pref) {
let error = maybeReturnErrorForReset(pref);
if (error) {
return Promise.reject(error);
}
try {
Services.prefs.clearUserPref(pref);
} catch (ex) {
Cu.reportError(ex);
return Promise.reject(ex.message);
}
return Promise.resolve();
}
receiveMessage(msg) {
if (msg.name == "AsyncPrefs:SetPref") {
return AsyncPrefsParent.set(msg.data.pref, msg.data.value);
}
return AsyncPrefsParent.reset(msg.data.pref);
}
}
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