Greg Stoll
827e603217
This avoids having one of these per window. Differential Revision: https://phabricator.services.mozilla.com/D312072
40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
|
|
|
|
export let SerialDeviceSharingHelper = {
|
|
_activePortCounts: new WeakMap(),
|
|
|
|
observe(subject, topic, _data) {
|
|
if (topic != "serial-device-state-changed") {
|
|
return;
|
|
}
|
|
|
|
let props = subject.QueryInterface(Ci.nsIPropertyBag2);
|
|
const browserId = props.getPropertyAsUint64("browserId");
|
|
let bc = BrowsingContext.getCurrentTopByBrowserId(browserId);
|
|
if (!bc) {
|
|
console.warn("BrowsingContext not found for browser ID:", browserId);
|
|
return;
|
|
}
|
|
let browser = bc.embedderElement;
|
|
if (!browser) {
|
|
console.warn("No embedder element for BrowsingContext");
|
|
return;
|
|
}
|
|
|
|
let connected = props.getPropertyAsBool("connected");
|
|
let count = this._activePortCounts.get(browser) || 0;
|
|
count = connected ? count + 1 : Math.max(0, count - 1);
|
|
this._activePortCounts.set(browser, count);
|
|
|
|
browser.documentGlobal?.gBrowser?.updateBrowserSharing(browser, {
|
|
serial: count > 0 ? "serial" : null,
|
|
});
|
|
},
|
|
|
|
resetBrowserCount(browser) {
|
|
this._activePortCounts.delete(browser);
|
|
},
|
|
};
|