public void Show(int duration, ISnackbarManagerCallback callback)
{
lock (mLock)
{
if (IsCurrentSnackbar(callback))
{
// Means that the callback is already in the queue. We'll just update the duration
mCurrentSnackbar.mDuration = duration;
// If this is the TSnackbar currently being shown, call re-schedule it's
// timeout
mHandler.RemoveCallbacksAndMessages(mCurrentSnackbar);
ScheduleTimeoutLocked(mCurrentSnackbar);
return;
}
if (IsNextSnackbar(callback))
{
// We'll just update the duration
mNextSnackbar.mDuration = duration;
}
else
{
// Else, we need to create a new record and queue it
mNextSnackbar = new SnackbarRecord(duration, callback);
}
if (mCurrentSnackbar != null && CancelSnackbarLocked(mCurrentSnackbar,
Callback.DISMISS_EVENT_CONSECUTIVE))
{
// If we currently have a TSnackbar, try and cancel it and wait in line
}
// Clear out the current snackbar
mCurrentSnackbar = null;
// Otherwise, just show it now
ShowNextSnackbarLocked();
}
}
public void HandleTimeout(SnackbarRecord record)
{
lock (mLock)
{
if (mCurrentSnackbar == record || mNextSnackbar == record)
{
CancelSnackbarLocked(record, Callback.DISMISS_EVENT_TIMEOUT);
}
}
}
public void OnDismissed(ISnackbarManagerCallback callback)
{
lock (mLock)
{
if (IsCurrentSnackbar(callback))
{
// If the callback is from a TSnackbar currently show, remove it and show a new one
mCurrentSnackbar = null;
if (mNextSnackbar != null)
{
ShowNextSnackbarLocked();
}
}
}
}
private void ScheduleTimeoutLocked(SnackbarRecord record)
{
if (record.mDuration == TSnackbar.LENGTH_INDEFINITE)
{
// If we're set to indefinite, we don't want to set a timeout
return;
}
int durationMs = LONG_DURATION_MS;
if (record.mDuration > 0)
{
durationMs = record.mDuration;
}
else if (record.mDuration == TSnackbar.LENGTH_SHORT)
{
durationMs = SHORT_DURATION_MS;
}
mHandler.RemoveCallbacksAndMessages(record);
mHandler.PostDelayed(() => HandleTimeout(record), durationMs);
}
private bool CancelSnackbarLocked(SnackbarRecord record, int ev)
{
if (record.mCallback != null)
{
ISnackbarManagerCallback callbackResult;
if (record.mCallback.TryGetTarget(out callbackResult))
{
callbackResult.Dismiss(ev);
return true;
}
}
return false;
}
private void ShowNextSnackbarLocked()
{
if (mNextSnackbar != null)
{
mCurrentSnackbar = mNextSnackbar;
mNextSnackbar = null;
if (mCurrentSnackbar.mCallback != null)
{
ISnackbarManagerCallback callbackResult;
if (mCurrentSnackbar.mCallback.TryGetTarget(out callbackResult))
{
callbackResult.Show();
}
}
else
{
// The callback doesn't exist any more, clear out the TSnackbar
mCurrentSnackbar = null;
}
}
}