97 lines
2.7 KiB
JavaScript
97 lines
2.7 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const Cu = Components.utils;
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const {XPCOMUtils} = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});
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const {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
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// Load devtools module lazily.
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XPCOMUtils.defineLazyGetter(this, "devtools", function () {
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const {devtools} = Cu.import("resource://devtools/shared/Loader.jsm", {});
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return devtools;
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});
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// Load JsonView services lazily.
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XPCOMUtils.defineLazyGetter(this, "JsonViewService", function () {
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const {JsonViewService} = devtools.require("devtools/client/jsonview/converter-child");
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return JsonViewService;
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});
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XPCOMUtils.defineLazyGetter(this, "JsonViewSniffer", function () {
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const {JsonViewSniffer} = devtools.require("devtools/client/jsonview/converter-sniffer");
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return JsonViewSniffer;
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});
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// Constants
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const JSON_VIEW_PREF = "devtools.jsonview.enabled";
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/**
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* Listen for 'devtools.jsonview.enabled' preference changes and
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* register/unregister the JSON View XPCOM services as appropriate.
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*/
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function ConverterObserver() {
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}
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ConverterObserver.prototype = {
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initialize: function () {
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// Only the DevEdition has this feature available by default.
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// Users need to manually flip 'devtools.jsonview.enabled' preference
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// to have it available in other distributions.
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if (this.isEnabled()) {
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this.register();
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}
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Services.prefs.addObserver(JSON_VIEW_PREF, this, false);
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Services.obs.addObserver(this, "xpcom-shutdown", false);
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},
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observe: function (subject, topic, data) {
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switch (topic) {
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case "xpcom-shutdown":
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this.onShutdown();
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break;
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case "nsPref:changed":
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this.onPrefChanged();
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break;
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}
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},
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onShutdown: function () {
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Services.prefs.removeObserver(JSON_VIEW_PREF, observer);
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Services.obs.removeObserver(observer, "xpcom-shutdown");
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},
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onPrefChanged: function () {
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if (this.isEnabled()) {
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this.register();
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} else {
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this.unregister();
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}
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},
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register: function () {
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JsonViewSniffer.register();
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JsonViewService.register();
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},
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unregister: function () {
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JsonViewSniffer.unregister();
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JsonViewService.unregister();
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},
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isEnabled: function () {
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return Services.prefs.getBoolPref(JSON_VIEW_PREF);
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},
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};
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// Listen to JSON View 'enable' pref and perform dynamic
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// registration or unregistration of the main application
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// component.
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var observer = new ConverterObserver();
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observer.initialize();
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