Review Request 123540: Don't trigger updates when no actual updates happened + never modify the KNotification object from the popup plugin

[Martin Klapetek]

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https://git.reviewboard.kde.org/r/123540/
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Review request for KDE Frameworks and Plasma.


Bugs: 345973
    https://bugs.kde.org/show_bug.cgi?id=345973


Repository: knotifications


Description
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This patch checks if the properties being set are actually changed before emitting the update signal, which would cause a re-emit of the notification.

Furthermore, NotifyByPopup now no longer changes the KNotification object when the server does not support certain capabilities but only does local checking and modifications.

This fixes KNotification use with Ubuntu's NotifyOSD.


Diffs
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  src/knotification.cpp afac82f 
  src/notifybypopup.cpp 316ff2b 

Diff: https://git.reviewboard.kde.org/r/123540/diff/


Testing
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Before this patch there was a continous loop of setting empty actions because the server does not support them -> triggers update -> triggers setting empty actions -> triggers update -> and so on. This made the notification popup look stuck and would block all other notifications from appearing (NotifyOSD supports only one popup at a time).

Now everything behaves correctly.


Thanks,

Martin Klapetek

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