bigbluebutton-Github/bbb-screenshare/webrtc-extensions/chrome/background.js
2017-05-03 16:40:21 +00:00

58 lines
1.8 KiB
JavaScript
Executable File

/**
* BigBlueButton open source conferencing system - http://www.bigbluebutton.org/
*
* Copyright (c) 2012 BigBlueButton Inc. and by respective authors (see below).
*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation; either version 3.0 of the License, or (at your option) any later
* version.
*
* BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
*
*/
function getSourceId(sender, callback, request) {
var presetSources = ["screen", "window", "tab"];
var sourcesToUse = request.sources || presetSources;
var tab = sender.tab;
// https://bugs.chromium.org/p/chromium/issues/detail?id=425344
tab.url = sender.url;
// Gets chrome media stream token and returns it in the response.
chrome.desktopCapture.chooseDesktopMedia(
sourcesToUse, tab,
function (streamId) {
if (!streamId || !streamId.length) {
callback({ error: 'permissionDenied' });
return;
}
callback({ streamId: streamId });
});
return true;
}
chrome.runtime.onMessageExternal.addListener(
function(request, sender, callback) {
if(request.getVersion) {
callback({ version: chrome.runtime.getManifest().version });
return false;
} else if(request.getStream) {
getSourceId(sender, callback, request);
return true;
} else {
callback({ error: 'malformed request', request });
return false;
}
}
);