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"=============================================================================
" File: smartspace.vim
" Author: Carl Muller
" Created: Fri Dec 06 12:00 AM 2002 PST
"
" Description:
" Maps the <space> key in insert mode so that mathematical formulaes are
" always kept on the same line. i.e, $$'s dont get broken across multiple
" lines.
"=============================================================================
" Avoid reinclusion or if the user doesn't want us.
if exists('b:done_smartspace')
\ || (exists('g:Tex_SmartKeySpace') && !g:Tex_SmartKeySpace)
finish
endif
let b:done_smartspace = 1
" Smart space relies on taking over vim's insertion of carriage returns in
" order to keep $$'s on the same line. The only way to get vim not to break
" lines is to set tw=0.
"
" NOTE: setting tw != 0 will break smartspace
" the user's 'tw' setting is still respected in the insert mode.
" However, normal mode actions which rely on 'tw' such as gqap will be
" broken because of the faulty 'tw' setting.
let b:tw = &l:tw
setlocal tw=0
inoremap <buffer> <silent> <Space> <Space><Esc>:call <SID>TexFill(b:tw)<CR>a
" Do not redefine the function.
if exists('*s:TexFill')
finish
endif
" TexFormatLine: format line retaining $$'s on the same line. {{{
function! s:TexFill(width)
if a:width != 0 && col(".") > a:width
" For future use, record the current line and the number of the current column
let current_line = getline(".")
let current_column = col(".")
exe "normal! a##\<Esc>"
call <SID>TexFormatLine(a:width,current_line,current_column)
exe "normal! ?##\<CR>2s\<Esc>"
" Remove ## from the search history.
call histdel("/", -1)|let @/=histget("/", -1)
endif
endfunction
" }}}
function! s:TexFormatLine(width, current_line, current_column) " {{{
" get the first non-blank character.
let first = matchstr(getline('.'), '\S')
normal! $
let length = col('.')
let go = 1
while length > a:width+2 && go
let between = 0
let string = strpart(getline('.'), 0, a:width)
" Count the dollar signs
let number_of_dollars = 0
let evendollars = 1
let counter = 0
while counter <= a:width-1
" Pay attention to '$$'.
if string[counter] == '$' && string[counter-1] != '$'
let evendollars = 1 - evendollars
let number_of_dollars = number_of_dollars + 1
endif
let counter = counter + 1
endwhile
" Get ready to split the line.
exe 'normal! ' . (a:width + 1) . '|'
if evendollars
" Then you are not between dollars.
exe "normal! ?\\$\\+\\| \<CR>W"
else
" Then you are between dollars.
normal! F$
if col(".") == 1 || getline('.')[col(".")-1] != "$"
let go = 0
endif
endif
if first == '$' && number_of_dollars == 1
let go = 0
else
exe "normal! i\<CR>\<Esc>$"
" get the first non-blank character.
let first = matchstr(getline('.'), '\S')
endif
let length = col(".")
endwhile
if go == 0 && strpart(a:current_line, 0, a:current_column) =~ '.*\$.*\$.*'
exe "normal! ^f$a\<CR>\<Esc>"
call <SID>TexFormatLine(a:width, a:current_line, a:current_column)
endif
endfunction
" }}}
" vim:fdm=marker:ts=4:sw=4:noet
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