/vim/ftplugin/latex-suite/smartspace.vim

  1"=============================================================================
  2" 	     File: smartspace.vim
  3"      Author: Carl Muller
  4"     Created: Fri Dec 06 12:00 AM 2002 PST
  5" 
  6" Description: 
  7"     Maps the <space> key in insert mode so that mathematical formulaes are
  8"     always kept on the same line. i.e, $$'s dont get broken across multiple
  9"     lines.
 10"=============================================================================
 11
 12" Avoid reinclusion or if the user doesn't want us.
 13if exists('b:done_smartspace') 
 14	\ || (exists('g:Tex_SmartKeySpace') && !g:Tex_SmartKeySpace)
 15	finish
 16endif
 17let b:done_smartspace = 1
 18
 19" Smart space relies on taking over vim's insertion of carriage returns in
 20" order to keep $$'s on the same line. The only way to get vim not to break
 21" lines is to set tw=0. 
 22"
 23" NOTE: setting tw != 0 will break smartspace
 24"       the user's 'tw' setting is still respected in the insert mode.
 25"       However, normal mode actions which rely on 'tw' such as gqap will be
 26"       broken because of the faulty 'tw' setting.
 27let b:tw = &l:tw
 28setlocal tw=0
 29
 30inoremap <buffer> <silent> <Space> <Space><Esc>:call <SID>TexFill(b:tw)<CR>a
 31
 32" Do not redefine the function.
 33if exists('*s:TexFill')
 34	finish
 35endif
 36
 37" TexFormatLine: format line retaining $$'s on the same line. {{{
 38function! s:TexFill(width) 
 39	if a:width != 0 && col(".") > a:width
 40		" For future use, record the current line and the number of the current column
 41		let current_line = getline(".")
 42		let current_column = col(".")
 43		exe "normal! a##\<Esc>"
 44		call <SID>TexFormatLine(a:width,current_line,current_column)
 45		exe "normal! ?##\<CR>2s\<Esc>"
 46		" Remove ## from the search history.
 47		call histdel("/", -1)|let @/=histget("/", -1)
 48	endif
 49endfunction
 50
 51" }}}
 52function! s:TexFormatLine(width, current_line, current_column)    " {{{
 53	" get the first non-blank character.
 54	let first = matchstr(getline('.'), '\S')
 55	normal! $
 56	let length = col('.')
 57	let go = 1
 58	while length > a:width+2 && go
 59		let between = 0
 60		let string = strpart(getline('.'), 0, a:width)
 61		" Count the dollar signs
 62		let number_of_dollars = 0
 63		let evendollars = 1
 64		let counter = 0
 65		while counter <= a:width-1
 66			" Pay attention to '$$'.
 67			if string[counter] == '$' && string[counter-1] != '$'
 68				let evendollars = 1 - evendollars
 69				let number_of_dollars = number_of_dollars + 1
 70			endif
 71			let counter = counter + 1
 72		endwhile
 73		" Get ready to split the line.
 74		exe 'normal! ' . (a:width + 1) . '|'
 75		if evendollars
 76			" Then you are not between dollars.
 77			exe "normal! ?\\$\\+\\| \<CR>W"
 78		else
 79			" Then you are between dollars.
 80			normal! F$
 81			if col(".") == 1 || getline('.')[col(".")-1] != "$"
 82				let go = 0
 83			endif
 84		endif
 85		if first == '$' && number_of_dollars == 1
 86			let go = 0
 87		else
 88			exe "normal! i\<CR>\<Esc>$"
 89			" get the first non-blank character.
 90			let first = matchstr(getline('.'), '\S')
 91		endif
 92		let length = col(".")
 93	endwhile
 94	if go == 0 && strpart(a:current_line, 0, a:current_column) =~ '.*\$.*\$.*'
 95		exe "normal! ^f$a\<CR>\<Esc>"
 96		call <SID>TexFormatLine(a:width, a:current_line, a:current_column)
 97	endif
 98endfunction
 99
100" }}}
101
102" vim:fdm=marker:ts=4:sw=4:noet