зеркало из https://github.com/mozilla/pjs.git
84 строки
3.3 KiB
JavaScript
84 строки
3.3 KiB
JavaScript
/* 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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const kProtocolName = "b2g-camera:";
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let CameraContent = function() {
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this.hasPrivileges = false;
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this.mapping = [];
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}
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CameraContent.prototype = {
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getCameraURI: function(aOptions) {
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if (!this.hasPrivileges)
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return null;
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let options = aOptions || { };
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if (!options.camera)
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options.camera = 0;
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if (!options.width)
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options.width = 320;
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if (!options.height)
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options.height = 240;
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let uuid = Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator).generateUUID().toString();
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uuid = uuid.substring(1, uuid.length - 2); // remove the brackets
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this.mapping.push(uuid);
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let uri = kProtocolName + "?camera=" + options.camera +
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"&width=" + options.width +
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"&height=" + options.height +
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"&type=video/x-raw-yuv";
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// XXX that's no e10s ready, but the camera inputstream itself is not...
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Services.prefs.setCharPref("b2g.camera." + kProtocolName + "?" + uuid, uri);
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return kProtocolName + "?" + uuid;
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},
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observe: function(aSubject, aTopic, aData) {
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if (aTopic == "inner-window-destroyed") {
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let wId = aSubject.QueryInterface(Ci.nsISupportsPRUint64).data;
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if (wId == this.innerWindowID) {
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Services.obs.removeObserver(this, "inner-window-destroyed");
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for (let aId in this.mapping)
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Services.prefs.clearUserPref("b2g.camera." + kProtocolName + "?" + aId);
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this.mapping = null;
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}
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}
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},
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init: function(aWindow) {
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let principal = aWindow.document.nodePrincipal;
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let secMan = Cc["@mozilla.org/scriptsecuritymanager;1"].getService(Ci.nsIScriptSecurityManager);
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let perm = principal == secMan.getSystemPrincipal() ? Ci.nsIPermissionManager.ALLOW_ACTION : Services.perms.testExactPermission(principal.URI, "content-camera");
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//only pages with perm set and chrome pages can use the camera in content
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this.hasPrivileges = perm == Ci.nsIPermissionManager.ALLOW_ACTION;
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Services.obs.addObserver(this, "inner-window-destroyed", false);
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let util = aWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
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this.innerWindowID = util.currentInnerWindowID;
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},
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classID: Components.ID("{eff4231b-abce-4f7f-a40a-d646e8fde3ce}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIB2GCameraContent, Ci.nsIDOMGlobalPropertyInitializer, Ci.nsIObserver]),
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classInfo: XPCOMUtils.generateCI({classID: Components.ID("{eff4231b-abce-4f7f-a40a-d646e8fde3ce}"),
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contractID: "@mozilla.org/b2g-camera-content;1",
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interfaces: [Ci.nsIB2GCameraContent],
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flags: Ci.nsIClassInfo.DOM_OBJECT,
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classDescription: "B2G Camera Content Helper"})
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}
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const NSGetFactory = XPCOMUtils.generateNSGetFactory([CameraContent]);
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