Re: redraw crashes on android

On 25/08/13 20:45, Nikolay Pavlov wrote:
>
> On Aug 25, 2013 10:36 PM, "Liang Li" <q335r49@gmail.com
> <mailto:q335r49@gmail.com>> wrote:
> >
> > Hey guys, this is sort of an obscure problem, I'm not sure if you
> have any suggestions. I'm running vim 7.3.3 (locally) on an android
> phone, via Connectbot, and I'm getting a crash that can't be reproduced
> on a computer due to redr!, maybe because of memory constraints or
> something. For example, the following script will crash my phone after
> about 3 seconds
>
> Why not use some more recent version? There were plenty of bug fixes.
>
> > while 1
> > if reltime()[1]%2
> > exe "norm! \<c-e>"
> > else
> > exe "norm! \<c-y>"
> > en
> > redr!
> > endwhile
> >
> > On the "verbose" error log I get an "Interrupted" message and it
> jumps straight into my VimLeavePre autocommmands. I'm mostly looking for
> a work-around or any suggestions as to how to avoid this, or whether
> it's possible to do a safer redraw, etc. Try / catch, for example,
> doesn't work.
>
> Try setting 'nolazyredraw'. This should cause normally omitted redraws
> while script is running. I have no other idea how to cause a redraw
> except for :execute "normal!\<C-l>", which should not make any difference.

There is also :redraw (or :redraw! to clear the screen before
redrawing). See :help :redraw

>
> > The actual script I'm working on, if this is relevant, is a mouse
> panning thing, a la Adobe reader:
> >
> > nn <silent> <leftmouse> :call getchar()<cr><leftmouse>:exe
> (MousePan()==1? "keepj norm! \<lt>leftmouse>":"")<cr>
> > let
> glidestep=[99999999]+map(range(11),'11*(11-v:val)*(11-v:val)')
> > fun! MousePan()
> > if v:mouse_lnum>line('w$') || (&wrap &&
> v:mouse_col%winwidth(0)==1) || (!&wrap &&
> v:mouse_col>=winwidth(0)+winsaveview().leftcol) || v:mouse_lnum==line('$')
> > if line('$')==line('w0') | exe "keepj norm!
> \<c-y>" |en
> > return 1 | en
> > exe "norm! \<leftmouse>"
> > let
> [veon,fr,tl,dvl,dhl]=[&ve==?'all',-1,repeat([reltime()],4),[0,0,0,0],[0,0,0,0]]
> > let v=winsaveview()
> > let [v.col,v.coladd]=[0,v.curswant]
> > while getchar()=="\<leftdrag>"
> > let
> [dV,dH,fr]=[min([v:mouse_lnum-v.lnum,v.topline-1]),
> min([veon*(v:mouse_col-v.coladd-1),v.leftcol]),(fr+1)%4]
> > let
> [v.topline,v.leftcol,v.lnum,v.coladd,tl[fr],dvl[fr],dhl[fr]]=[v.topline-dV,v.leftcol-dH,v:mouse_lnum-dV,v:mouse_col-1-dH,reltime(),dV,dH]
> > call winrestview(v)
> > redr!
> > endwhile
> > let
> [sv,sh]=[dvl[0]+dvl[1]+dvl[2]+dvl[3],dhl[0]+dhl[1]+dhl[2]+dhl[3]]
> > let [ctl,cln,sv]=sv>2?
> ['-(v.topline>1)','-(v.lnum>1)',sv+10] : sv<-2?
> ['v.topline<'.line('$'),'v.lnum<'.line('$'),-sv+10] :
> ['-(v.topline>1)','-(v.lnum>1)',0]
> > let [clc,cca,sh,vc,hc]=sh>2?
> ['-(v.leftcol>0)','-(v.coladd>0)',sh+10,0,0] : sh<-2?
> ['1','1',-sh+10,0,0] : ['1','1',0,0,0]
> > if !eval(join(reltime(tl[(fr+1)%4]),' || 20000<')) ||
> !sv && !sh | return | en
> > while !getchar(1) && sv+sh>0
> > let
> [y,x,vc,hc]=[vc>get(g:glidestep,sv,1),hc>get(g:glidestep,sh,1),vc+1,hc+1]
> > if y+x
> > let [v.topline,v.lnum,sv,vc]+=y?
> [eval(ctl),eval(cln),-1,-vc] : [0,0,0,0]
> > let [v.leftcol,v.coladd,sh,hc]+=x?
> [eval(clc),eval(cca),-1,-hc] : [0,0,0,0]
> > call winrestview(v)
> > redr!
> > en
> > endw
> > endfun
> >


Best regards,
Tony.
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