320fae3d2c
The goal of these patches is to load neither PdfJs.jsm nor PdfStreamConverter.jsm in a content process unless the user is viewing a PDF, to save memory. This first patch creates a small stub JSM to do the stream registration, and calls it directly in the content process, avoiding one way we load PdfJs.jsm. The existing registration methods are kept for the main process. MozReview-Commit-ID: 5GH8tjHXfLb
134 lines
3.6 KiB
JavaScript
134 lines
3.6 KiB
JavaScript
/* Copyright 2012 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 = ["PdfjsContentUtils"];
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ChromeUtils.import("resource://gre/modules/Services.jsm");
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var PdfjsContentUtils = {
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_mm: null,
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/*
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* Public API
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*/
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init() {
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// child *process* mm, or when loaded into the parent for in-content
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// support the psuedo child process mm 'child PPMM'.
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if (!this._mm) {
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this._mm = Services.cpmm;
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this._mm.addMessageListener("PDFJS:Child:updateSettings", this);
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Services.obs.addObserver(this, "quit-application");
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}
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},
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uninit() {
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if (this._mm) {
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this._mm.removeMessageListener("PDFJS:Child:updateSettings", this);
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Services.obs.removeObserver(this, "quit-application");
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}
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this._mm = null;
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},
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/*
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* prefs utilities - the child does not have write access to prefs.
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* note, the pref names here are cross-checked against a list of
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* approved pdfjs prefs in chrome utils.
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*/
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clearUserPref(aPrefName) {
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this._mm.sendSyncMessage("PDFJS:Parent:clearUserPref", {
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name: aPrefName,
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});
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},
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setIntPref(aPrefName, aPrefValue) {
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this._mm.sendSyncMessage("PDFJS:Parent:setIntPref", {
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name: aPrefName,
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value: aPrefValue,
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});
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},
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setBoolPref(aPrefName, aPrefValue) {
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this._mm.sendSyncMessage("PDFJS:Parent:setBoolPref", {
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name: aPrefName,
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value: aPrefValue,
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});
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},
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setCharPref(aPrefName, aPrefValue) {
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this._mm.sendSyncMessage("PDFJS:Parent:setCharPref", {
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name: aPrefName,
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value: aPrefValue,
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});
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},
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setStringPref(aPrefName, aPrefValue) {
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this._mm.sendSyncMessage("PDFJS:Parent:setStringPref", {
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name: aPrefName,
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value: aPrefValue,
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});
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},
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/*
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* Request the display of a notification warning in the associated window
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* when the renderer isn't sure a pdf displayed correctly.
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*/
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displayWarning(aWindow, aMessage, aLabel, aAccessKey) {
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// the child's dom frame mm associated with the window.
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let winmm = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDocShell)
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.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIContentFrameMessageManager);
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winmm.sendAsyncMessage("PDFJS:Parent:displayWarning", {
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message: aMessage,
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label: aLabel,
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accessKey: aAccessKey,
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});
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},
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/*
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* Events
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*/
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observe(aSubject, aTopic, aData) {
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if (aTopic === "quit-application") {
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this.uninit();
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}
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},
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receiveMessage(aMsg) {
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switch (aMsg.name) {
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case "PDFJS:Child:updateSettings":
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// Only react to this if we are remote.
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if (Services.appinfo.processType ===
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Services.appinfo.PROCESS_TYPE_CONTENT) {
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let jsm = "resource://pdf.js/PdfJsRegistration.jsm";
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let pdfjsr = ChromeUtils.import(jsm, {}).PdfJsRegistration;
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if (aMsg.data.enabled) {
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pdfjsr.ensureRegistered();
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} else {
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pdfjsr.ensureUnregistered();
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}
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}
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break;
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}
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},
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};
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