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/**
* Nextcloud Firefox extension.
*
* Script that will be loaded in all frames (i.e. tabs and windows).
*
* @author Joachim Bauch <bauch@struktur.de>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
(function(cfmm) {
var START_SCREENSHARING_MESSAGE = 'webrtcStartScreensharing';
var STOP_SCREENSHARING_MESSAGE = 'webrtcStopScreensharing';
var NAMESPACE = 'nextcloud-spreed';
var initialized = false;
var unique_id;
var extensionData = {
id: null,
version: null
};
var logMessage = function() {
sendSyncMessage(NAMESPACE + ':log', Array.prototype.slice.call(arguments));
};
(function(data) {
var d = data && data[0];
if (d && d.version && d.id) {
extensionData.id = d.id;
extensionData.version = d.version;
} else {
throw new Error('Extension information not found.');
}
})(cfmm.sendSyncMessage(NAMESPACE + ':ExtensionDataSync'));
var hasClass = function(element, cls) {
return (' ' + element.className + ' ').indexOf(' ' + cls + ' ') > -1;
};
var isNextcloudSpreedApp = function(document) {
if (!document) {
return false;
}
var nc = document.getElementById('app');
if (!nc || !hasClass(nc, 'nc-enable-screensharing-extension')) {
return false;
}
return true;
};
var messageHandler = function(event) {
var window = cfmm.content;
if (!initialized || event.origin != window.location.origin || !event.data) {
return;
}
var host = window.location.hostname;
var data = event.data;
switch (data.type) {
case 'webrtcStartScreensharing':
logMessage("start screensharing", host);
sendSyncMessage(NAMESPACE + ':' + START_SCREENSHARING_MESSAGE, {"host": host});
window.postMessage({'type': 'webrtcScreensharingWhitelisted', 'id': data.id}, event.origin);
break;
case 'webrtcStopScreensharing':
logMessage("stop screensharing", host);
sendSyncMessage(NAMESPACE + ':' + STOP_SCREENSHARING_MESSAGE, {"host": host});
break;
}
};
var removeHandlers = function(window, document) {
if (!initialized) {
return;
}
window.removeEventListener('message', messageHandler);
initialized = false;
};
var showAvailability = function(document) {
var nc = document.getElementById('app');
nc.setAttribute('data-firefoxExtensionData', JSON.stringify(extensionData));
};
var installHandlers = function(window, document) {
// Only add extension if the page is running the Nextcloud Spreed -app.
if (!isNextcloudSpreedApp(document)) {
removeHandlers(document);
return;
}
removeHandlers(document);
logMessage('Detected Nextcloud Spreed app.');
window.addEventListener('message', messageHandler);
showAvailability(document);
initialized = true;
};
var loaded = function() {
if (!cfmm.content) {
return;
}
installHandlers(cfmm.content, cfmm.content.document);
};
var init = function(msg) {
if (msg.data) {
unique_id = msg.data.unique_id;
}
loaded();
cfmm.removeMessageListener(NAMESPACE + ':startup', init);
};
var teardown = function(msg) {
if (unique_id !== msg.data.unique_id) {
return;
}
cfmm.removeMessageListener(NAMESPACE + ':startup', init);
cfmm.removeMessageListener(NAMESPACE + ':teardown', teardown);
removeHandlers(cfmm.content, cfmm.content.document);
unique_id = null;
};
cfmm.addEventListener('DOMContentLoaded', loaded);
cfmm.addEventListener('load', loaded);
cfmm.addMessageListener(NAMESPACE + ':startup', init);
cfmm.addMessageListener(NAMESPACE + ':teardown', teardown);
// logMessage('Loaded framescript.js');
})(this);
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