dd1dbef63e
This inlines and simplifies the call to XPCOMUtils._getFactory, because otherwise passing PdfStreamConverter appears to resolve it immediately, loading the JSM. (The stream converter prototype does not have a property _xpcom_factory, so there's no need for the check.) Once that is done, we can just lazily load the stream converter JSM to keep it from being loaded on startup. This patch also checks that the stream converter is not loaded at startup in the main process or the content process, and that PdfJs.jsm is not loaded at startup in the content process. It needs to be loaded in the main process to watch for some prefs. MozReview-Commit-ID: EA0pSgs4AWH
92 lines
2.8 KiB
JavaScript
92 lines
2.8 KiB
JavaScript
/* Copyright 2018 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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"use strict";
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var EXPORTED_SYMBOLS = ["PdfJsRegistration"];
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const Cm = Components.manager;
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ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
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ChromeUtils.defineModuleGetter(this, "PdfStreamConverter",
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"resource://pdf.js/PdfStreamConverter.jsm");
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// Register/unregister a constructor as a factory.
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function StreamConverterFactory() {}
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StreamConverterFactory.prototype = {
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// properties required for XPCOM registration:
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_classID: Components.ID("{d0c5195d-e798-49d4-b1d3-9324328b2291}"),
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_classDescription: "pdf.js Component",
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_contractID: "@mozilla.org/streamconv;1?from=application/pdf&to=*/*",
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_classID2: Components.ID("{d0c5195d-e798-49d4-b1d3-9324328b2292}"),
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_contractID2: "@mozilla.org/streamconv;1?from=application/pdf&to=text/html",
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register: function register() {
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var factory = {
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createInstance(outer, iid) {
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if (outer)
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throw Cr.NS_ERROR_NO_AGGREGATION;
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return (new PdfStreamConverter()).QueryInterface(iid);
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},
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QueryInterface: ChromeUtils.generateQI([Ci.nsIFactory])
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};
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this._factory = factory;
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var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar);
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registrar.registerFactory(this._classID, this._classDescription,
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this._contractID, factory);
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registrar.registerFactory(this._classID2, this._classDescription,
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this._contractID2, factory);
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},
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unregister: function unregister() {
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var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar);
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registrar.unregisterFactory(this._classID, this._factory);
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if (this._classID2) {
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registrar.unregisterFactory(this._classID2, this._factory);
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}
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this._factory = null;
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},
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};
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var PdfJsRegistration = {
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_registered: false,
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ensureRegistered: function ensureRegistered() {
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if (this._registered) {
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return;
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}
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this._pdfStreamConverterFactory = new StreamConverterFactory();
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this._pdfStreamConverterFactory.register();
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this._registered = true;
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},
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ensureUnregistered: function ensureUnregistered() {
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if (!this._registered) {
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return;
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}
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this._pdfStreamConverterFactory.unregister();
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delete this._pdfStreamConverterFactory;
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this._registered = false;
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},
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};
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