[Libreoffice] timers in calc

Julien Nabet serval2412 at yahoo.fr
Wed Nov 24 14:37:53 PST 2010

> Message: 3
> Date: Wed, 24 Nov 2010 08:39:11 +0100
> From: David Tardon<dtardon at redhat.com>
> Subject: Re: [Libreoffice] timers in calc
> To: libreoffice at lists.freedesktop.org
> Message-ID:<20101124073910.GH30828 at verda-stelo.brq.redhat.com>
> Content-Type: text/plain; charset=iso-8859-1
> On Wed, Nov 24, 2010 at 08:14:08AM +0100, Julien Nabet wrote:
>> Le 24/11/2010 08:11, Julien Nabet a ?crit :
>>> Date: Tue, 23 Nov 2010 22:20:36 -0500
>>> From: Kohei Yoshida<kyoshida at novell.com>
>>> Subject: Re: [Libreoffice] [PATCH] try to correct some timers in sc +
>>> 	question
>>> To:libreoffice at lists.freedesktop.org
>>> Message-ID:<1290568836.2532.14.camel at localhost>
>>> Content-Type: text/plain; charset="UTF-8"
>>> Hi Julien,
>>> On Sat, 2010-11-20 at 01:19 +0100, Julien Nabet wrote:
>>>>>   Hello,
>>>>>   >   Here's a try to correct some timers in scmod.cxx.
>>>>>   Here's what I did and why.
>>>>>   >   1) In IMPL_LINK( ScModule, SpellTimerHdl, Timer*, EMPTYARG
>>>> )
>>>>>   I just added aSpellTimer.Stop() when there's neither input from keyboard
>>>>>   nor ContinueOnlineSpelling.
>>>>>   + I changed the function to have 1 return only.
>>>>>   >   2) In IMPL_LINK( ScModule, IdleHandler, Timer*, EMPTYARG )
>>>>>   I removed all the things with bSpell since it seems that
>>>>>   ContinueOnlineSpelling is managed by SpellTimerHdl
>>>>>   I'd like to add a stop but i'd like first to understand what's the use
>>>>>   of all the SC_IDLE_STEP, SC_IDLE_MAX, nIdleCount...
>>>>>   >   I repeat, this patch is just a try. If I'm all wrong,
>>>> sorry for the
>>>>>   noise and please, explain my mistakes.
>>> Well, I applaud your attempt to challenge this rather difficult task,
>>> and sorry it took me so long to get back to you.
>>> I took a closer look at this issue, and while I don't yet have a
>>> complete picture of how this can be fixed, I can at least see that the
>>> problem is not with the spell check timer, but the idle timer.  The
>>> spell check timer itself actually turns itself off rather nicely after
>>> it does what it needs.  The idle timer, OTOH, keeps on running pretty
>>> much forever.  I guess my previous comment about the spell check timer
>>> may have given you the wrong impression.  Sorry about that.
>>> So, let's not change the spell check timer since it doesn't look broken,
>>> and let's focus on fixing the idle timer itself.
>> Hello,
>> To know how to fix the idle timer I'd like first understand well how
>> it works since it seems to be simpler than idletimer. Could you tell
>> me when and how the spelltimer is stopped ? (I haven't seen where it
>> had a stop).
>> Julien.
> Hi Julien,
> a timer is stopped after it expired, unless it's explicitly restarted or
> unless it's an auto timer (see Timer::ImplTimerCallbackProc in
> vcl/source/app/timer.cxx). If you look at sc/source/ui/app/scmod.cxx,
> you see that aSpellTimer is only restared (in SpellTimerHdl) if there is
> a fresh keyboard input or if spell checking of the whole sheet hasn't
> been finished yet, but aIdleTimer is restarted (in IdleHandler)
> unconditionally.
> HTH,
> D.
Hello David,

In fact I misunderstood the timers especially the "Stop" part because i 
took example with sd/source/core/drawdoc4.cxx
I thought that if "Stop" wasn't directly called, it couldn't stop, big 
mistake !

So I read in Timer::ImplTimerCallbackProc of the file 
vcl/source/app/timer.cxx (pity i know just some words of german since 
all the comments are in german in it).
and i saw a calling of "Stop" in it.

You said that aSpellTimer is only restarted in SpellTimerHdl but i saw 
line 1915 in the function IMPL_LINK( ScModule, IdleHandler, Timer*, 
BOOL bSpell = pDoc->ContinueOnlineSpelling();
if ( bSpell )
     aSpellTimer.Start();                                        // da 
ist noch was

Is it normal we find a Start calling of aSpellTimer in IMPL_LINK of 
IdleHandler ?

For the rest, i understand that aIdleTimer is always started because of 
this following line at the end of this same function, there's an 
unconditionnal :

It could help if we had the english translation of german comments (i 
know there's currently an "easy task" for this and that it must be quite 
tedious to translate all the comments) but could someone just translate 
this ?
// ueberhaupt noch was?
and above all, this ?
//      SC_IDLE_COUNT mal mit initialem Timeout, dann hochzaehlen

Perhaps just an idea for this timer. If it should be started only if 
there's something to do, i'd move these lines :
     return 0;

at the end of the block :
if ( bMore )

Indeed, the rest just seems a recalculation of the timeout of the 
handler and perhaps this recalculation must be analysed/rethought/optimized.

Of course, it's just a guess and so it has to be checked, tested, etc.


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