https://bugs.kde.org/show_bug.cgi?id=346768

--- Comment #60 from John Stanley <[email protected]> ---
(In reply to Alexey Chernov from comment #56)
> I've just applied and quite intensively tested two patches John attached.
> 
> At first for patches: I've actually looked through them before applying, and
> there're a couple of questions:
> 
> 1. I've modified kxmlgui patch a little — at first I've replaces close event
> stuff for calling queryClose() method. Following XSM protocol one is not
> allowed to close windows on the saving state as a) this is not necessary
> shutdown that save-yourself is triggered , it is explicitly stated in the
> documentation, and b) shutdown, if any, could normally be cancelled and
> session would continue, and closing some windows would just spoil this
> user's session.
Agreed. But, the close event here is actually "fake", no windows are actually
closed. In tracing queryClose(), it seemed appropriate to hook
KMainWindow::closeEvent() in KMainWindow::commitData() to pick up the "auto
save" functionality in KMainWindow::closeEvent(). KMainWindow::closeEvent()
potentially does some KMainWindow-specific auto saving, and then simply calls
queryClose().
Anyway, I'm happy to go with your call on this, but have a look at
KMainWindow::closeEvent() if you haven't already.
> 
> Another thing I removed is restore() method which is obviously the same as
> before, but always returns false. Is there any reason for it?
>
The  KMainWindow::restore() currently always returns false, which is not useful
for apps that choose to iterate over windows for multi-window restorations
(using a false return code terminate iteration). My change is to return true on
successful restoration, and false otherwise.

> 2. KSMServer patch is what I first have tried not to apply at all. Except
> the first edit, which seems to be right as it's just follows the comment,
> other stuff seems to be redundant. Could you please explain you ideas behind
> these changes? Anyway, everything works even without it (see below).
> 
Yup, the first edit is the only important one. The others, well, I was
tinkering a bit, and thinking of doing more, but its a bit time-consuming; I
should have removed them before posting. The final two edits are merely code
restructuring, no functional changes, should've removed 'em. The remaining
edits, associated with "Phase 2 for non-WM clients", are an attempt to allow
non-WM apps which want to do their shutdown processing in Phase 2 to do so
before the WM is shutdown (also in Phase 2). I don't specifically know of any
such apps, but, in principle there could be. 

> As for testing, I've tested the following use cases:
> 
> 1. Plain saving session. It's generally works even without any patches
> (except Qt patch https://codereview.qt-project.org/#/c/140115 I've applied
> much earlier). Works fine.
> 
> 2. Saving session with several "modified" clients — in my case it was KWrite
> with unsaved document and Konsole with "vim" running in one of the tabs. On
> logging out I was gently and sequencially asked for both KWrite and Konsole.
> Saved nothing and logged out. Works fine.
> 
> 3. Triggering session save with several "modified" clients and cancel
> logging out in one of them. In my case they were KWrite again with an
> unsaved document and Kate with an unsaved document. Here I tried two
> sub-clauses:
> 
>     a) at first, say "don't save" to KWrite and "Cancel" to Kate. Session
> continued successfully, no data is lost in both programs. Just KWin moved
> both of them to "Any virtual desktop" — it's apparently the default
> behaviour, appropriate for now. So works fine;
> 
>     b) finally, say "save" to KWrite and "don't save" to Kate. Session
> finished and then restored successfully except Kate crashed, which is
> apparently separate bug in Kate, which I will address, too. In terms of SM
> works fine.
> 
> As a conclusion, I think, this patch can be candidate for merge right now
> without even waiting for Qt patch — there's no harm in saving documents
> beforehand, but, of course, without Qt changes of this report:
> https://codereview.qt-project.org/#/c/140115 applications won't be restarted.
> 
> I'm attaching the patch with my modification. If there's no objection, John,
> I'd suggest you as original author to post it to https://reviewboard.kde.org
> so that we can have it reviewed and potentially merged as soon as possible.

Thanks again for the help and interest and I'll get on the
https://reviewboard.kde.org post asap.

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