vim expression to fold latex documents

[Antonio Recio]

When I open latex files I would like to be able to fold with one vim expression on the top of the file from \htitle to \clearpage.

I have a lot of blocks like this:

\htitle{Latex Title}

bla bla bla

bla bla bla

\clearpage

And I would like to get this

+ Latex Title

[Christian Brabandt]

Really, this is only very little tested, but seems to work so far:

fu! FoldTeXLines(lnum)
if !exists("s:fold")
let s:fold = 0
endif
let line = getline(a:lnum)
if line =~ '^\s*\\htitle'
let s:fold = 1
return s:fold
elseif line =~ '^\s*\\clearpage'
let s:fold = 0
return 1
endif
return s:fold
endfu

fu! FoldText(line)
return '+ '. matchstr(getline(a:line),'^\s*\\htitle{\zs.*\ze}')
endfu

setl fdm=expr fde=FoldTeXLines(v:lnum) fdt=FoldText(v:foldstart)

regards,
Christian

[Antonio Recio]

That's works great!

I would like to include too the folding of \subtitle->\clearpage.

How I can fold these lines:

htitle 

----

\clearpage

htitle

subtitle 

----

\clearpage

subtitle 

----

\clearpage

To this?:

+ htitle

+ htitle

+ subtitle

[Christian Brabandt]

Hi Antonio!

Try this:

fu! FoldTeXLines(lnum)
if !exists("s:fold")
let s:fold = '0'
endif
let line = getline(a:lnum)
if line =~ '^\s*\\htitle'
let s:fold = '>1'
return s:fold

elseif line =~ '^\s*\\subtitle' && s:fold != '>1'

let s:fold = '>1'
return s:fold
elseif line =~ '^\s*\\clearpage'

let s:fold = '<1'
return 1
endif
return '='
endfu

fu! FoldText(line)
return '+ '. matchstr(getline(a:line),'^\s*\\\(h\|sub\)title{\zs.*\ze}')
endfu

setl fdm=expr fde=FoldTeXLines(v:lnum) fdt=FoldText(v:foldstart)

regards,
Christian
--
Wie man sein Kind nicht nennen sollte:
Asta Lavista

[Christian Brabandt]

Hi vim_use!

That looks a little bit odd. Better is this:

fu! FoldTeXLines(lnum)
if !exists("s:fold")
let s:fold = '0'
endif
let line = getline(a:lnum)
if line =~ '^\s*\\htitle'
let s:fold = '>1'

elseif line =~ '^\s*\\subtitle' && s:fold != '>1'
let s:fold = '>1'

elseif line =~ '^\s*\\clearpage'
let s:fold = '<1'

else
let s:fold = '='

endif
return s:fold
endfu

regards,
Christian
--
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Glatzkopf: "Oh, nur 26 Mark, genau so teuer wie bei Dir ein Ortsgespr�ch!"