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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/. */
+
+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.annotationMode",
+ "pdfjs.sidebarViewOnLoad",
+ "pdfjs.scrollModeOnLoad",
+ "pdfjs.spreadModeOnLoad",
+ "pdfjs.textLayerMode",
+ "pdfjs.useOnlyCssZoom",
+ "pdfjs.viewOnLoad",
+ "pdfjs.disableAutoFetch",
+ "pdfjs.disableFontFace",
+ "pdfjs.disableRange",
+ "pdfjs.disableStream",
+ "pdfjs.enableScripting",
+
+ "reader.font_size",
+ "reader.font_type",
+ "reader.color_scheme",
+ "reader.content_width",
+ "reader.line_height",
+
+ "security.tls.version.enable-deprecated",
+ "security.xfocsp.errorReporting.automatic",
+
+ "network.trr.display_fallback_warning",
+]);
+
+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;
+}
+
+export 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 });
+ }
+}
+
+export 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",
+};
+
+export 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) {
+ console.error(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) {
+ console.error(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);
+ }
+}