On Fri, 13 Aug 2010, Jeri Raye wrote:
> I can imagine something like this:
>
> sy match vhdlFoo "\<foo\>"
> sy match vhdlBar "\<bar\>"
>
> sy region vhdlFooBarFold
> \ start=""
> \ end=""
> \ fold transparent
> \ keepend
>
> What to fill in for the start and end parameter of the region, to get
> the folding as:
> +-- x lines: foo ------------------------------------------------------
>
>
The attached file seems to do what you want, w.r.t. both the multiple
block keywords, and not modifying the original
$VIMRUNTIME/syntax/vhdl.vim. To use it, put it in your
~/.vim/after/syntax/ directory (create if needed) as 'vhdl.vim'.
For some insight into how it works, do:
:echo orig_syntax
:syn list vhdlStatement
Essentially, the file gets the original vhdlStatement list of keywords,
and recreates it, filtering out the keywords you want to use as folding
block indicators. (The attached file uses the list: 'if', 'else',
'entity', and 'zab'. You should be able to modify block_keywords to
whatever you want.)
Then it does two things: one is to fill in the answer to your question
above. Instead of creating the individual matches/regions 'vhdlFoo',
'vhdlBar', and 'vhdlFooBarFold', it just adds them as matches in
vhdlStatement, and adds the single region 'vhdlBlockFold':
syn region vhdlFooBarFold
\ start="\z(\<foo\|bar\>\)"
\ end="\<end\s\+\z1"
...etc...
--
Best,
Ben
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redir => original_syntax
silent syn list vhdlStatement
redir END
syn clear vhdlStatement
hi def link vhdlStatement Statement
let block_keywords = [ 'if', 'else', 'entity', 'zab' ]
for line in split(original_syntax, "\n")
let skippable = 0
for pat in ['^---','^\s*$','^\s\+match\>','^\s\+links to']
if match(line, pat) >= 0
let skippable += 1
endif
endfor
if !skippable
let line=substitute(line, '^vhdlStatement\s\+xxx', '', '')
let line=substitute(line, '^\s\+', '', '')
for kword in filter(split(line, '\s\+'), "index(block_keywords, v:val) <
0")
exe ":syn keyword vhdlStatement ".kword
endfor
endif
endfor
let match_block_keywords = '\<'.join(block_keywords,'\|').'\>'
exe ':syn match vhdlStatement /'.match_block_keywords.'/'
exe ':syn region vhdlBlockFold start=/\z('.match_block_keywords.'\)/
end=/\<end\s\+\z1/ fold transparent keepend'
