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