Thunderbird Links

cal.js

/**
 * Check if the specified calendar is writable. This is the case when it is not
 * marked readOnly, we are not offline, or we are offline and the calendar is
 * local.
 *
 * @param aCalendar     The calendar to check
 * @return              True if the calendar is writable
 */
function isCalendarWritable(aCalendar) {
    return (!aCalendar.getProperty("disabled") &&
            !aCalendar.readOnly &&
            (!getIOService().offline ||
             aCalendar.getProperty("requiresNetwork") === false));
}

tb-calendar.txt

In-Place Extension: /Users/msk/Desktop/moz/objdir-tb-release/mozilla/dist/Miramar.app/Contents/MacOS/extensions/{e2fda1a4-762b-4020-b5ad-a41df1933103}/chrome/calendar/content/calendar/calUtils.js

isCalen