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/* global Services, Preferences, EventEmitter, XPCOMUtils */
/* exported NewTabPrefsProvider */
"use strict";
this.EXPORTED_SYMBOLS = ["NewTabPrefsProvider"];
const {interfaces: Ci, utils: Cu} = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/Preferences.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyGetter(this, "EventEmitter", function() {
const {EventEmitter} = Cu.import("resource://devtools/shared/event-emitter.js", {});
return EventEmitter;
});
// Supported prefs and data type
const gPrefsMap = new Map([
["browser.newtabpage.remote", "bool"],
["browser.newtabpage.remote.mode", "str"],
["browser.newtabpage.remote.version", "str"],
["browser.newtabpage.enabled", "bool"],
["browser.newtabpage.enhanced", "bool"],
["browser.newtabpage.introShown", "bool"],
["browser.newtabpage.updateIntroShown", "bool"],
["browser.newtabpage.pinned", "str"],
["browser.newtabpage.blocked", "str"],
["intl.locale.matchOS", "bool"],
["general.useragent.locale", "localized"],
["browser.search.hiddenOneOffs", "str"],
]);
// prefs that are important for the newtab page
const gNewtabPagePrefs = new Set([
"browser.newtabpage.enabled",
"browser.newtabpage.enhanced",
"browser.newtabpage.pinned",
"browser.newtabpage.blocked",
"browser.newtabpage.introShown",
"browser.newtabpage.updateIntroShown",
"browser.search.hiddenOneOffs",
]);
let PrefsProvider = function PrefsProvider() {
EventEmitter.decorate(this);
};
PrefsProvider.prototype = {
observe(subject, topic, data) { // jshint ignore:line
if (topic === "nsPref:changed") {
if (gPrefsMap.has(data)) {
switch (gPrefsMap.get(data)) {
case "bool":
this.emit(data, Preferences.get(data, false));
break;
case "str":
this.emit(data, Preferences.get(data, ""));
break;
case "localized":
try {
this.emit(data, Preferences.get(data, "", Ci.nsIPrefLocalizedString));
} catch (e) {
this.emit(data, Preferences.get(data, ""));
}
break;
default:
this.emit(data);
break;
}
}
} else {
Cu.reportError(new Error("NewTabPrefsProvider observing unknown topic"));
}
},
/*
* Return the preferences that are important to the newtab page
*/
get newtabPagePrefs() {
let results = {};
for (let pref of gNewtabPagePrefs) {
results[pref] = Preferences.get(pref, null);
}
return results;
},
get prefsMap() {
return gPrefsMap;
},
init() {
for (let pref of gPrefsMap.keys()) {
Services.prefs.addObserver(pref, this, false);
}
},
uninit() {
for (let pref of gPrefsMap.keys()) {
Services.prefs.removeObserver(pref, this);
}
}
};
/**
* Singleton that serves as the default new tab pref provider for the grid.
*/
const gPrefs = new PrefsProvider();
let NewTabPrefsProvider = {
prefs: gPrefs,
newtabPagePrefSet: gNewtabPagePrefs,
};
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