349 lines
11 KiB
VimL
349 lines
11 KiB
VimL
" Intelligent Indent
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" Author: Michael Geddes < vimmer at frog dot wheelycreek dot net >
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" Version: 2.6
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" Last Modified: December 2010
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"
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" Histroy:
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" 1.0: - Added RetabIndent command - similar to :retab, but doesn't cause
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" internal tabs to be modified.
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" 1.1: - Added support for backspacing over spaced tabs 'smarttab' style
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" - Clean up the look of it by blanking the :call
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" - No longer a 'filetype' plugin by default.
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" 1.2: - Interactions with 'smarttab' were causing problems. Now fall back to
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" vim's 'smarttab' setting when inserting 'indent' tabs.
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" - Fixed compat with digraphs (which were getting swallowed)
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" - Made <BS> mapping work with the 'filetype' plugin mode.
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" - Make CTabAlignTo() public.
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" 1.3: - Fix removing trailing spaces with RetabIndent! which was causing
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" initial indents to disappear.
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" 1.4: - Fixed Backspace tab being off by 1
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" 2.0: - Add support for alignment whitespace for mismatched brackets to be spaces.
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" 2.1: - Fix = operator
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" 2.3: - Fix (Gene Smith) for error with non C files
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" - Add option for filetype maps
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" - Allow for lisp indentation
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" 2.4: - Fix bug in Retab
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" 2.5: - Fix issue with <CR> not aligning
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" 2.6: - Fix issue with alignment not disappearing.
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" This is designed as a filetype plugin (originally a 'Buffoptions.vim' script).
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"
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" The aim of this script is to be able to handle the mode of tab usage which
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" distinguishes 'indent' from 'alignment'. The idea is to use <tab>
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" characters only at the beginning of lines.
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"
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" This means that an individual can use their own 'tabstop' settings for the
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" indent level, while not affecting alignment.
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"
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" The one caveat with this method of tabs is that you need to follow the rule
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" that you never 'align' elements that have different 'indent' levels.
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"
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" :RetabIndent[!] [tabstop]
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" This is similar to the :retab command, with the exception that it
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" affects all and only whitespace at the start of the line, changing it to
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" suit your current (or new) tabstop and expandtab setting.
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" With the bang (!) at the end, the command also strips trailing
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" whitespace.
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"
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" CTabAlignTo(n)
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" 'Tab' to the n'th column from the start of the indent.
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" g:ctab_filetype_maps
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" set this to true if script used as a filetype plugin
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" g:ctab_disable_checkalign
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" set this to true to disable re-check of alignment
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" g:ctab_enable_default_filetype_maps
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" disable the filetype specific maps
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" g:ctab_disable_tab_maps
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" disable the (original) tab mappings
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if exists('g:ctab_filetype_maps') && g:ctab_filetype_maps
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let s:buff_map=' <buffer> '
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else
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let s:buff_map=''
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endif
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if exists('g:ctab_enable_default_filetype_maps') && ctab_enable_default_filetype_maps
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if s:buff_map != ''
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if (&filetype =~ '^\(cpp\|idl\)$' )
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imap <silent> <buffer> <expr> <m-;> CTabAlignTo(20).'//'
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imap <silent> <buffer> <expr> <m-s-;> CTabAlignTo(30).'//'
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imap <silent> <buffer> <20> <m-s-;>
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elseif &filetype == 'c'
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imap <expr> <silent> <buffer> <m-;> CTabAlignTo(10).'/* */<left><left><left>'
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endif
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else
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au FileType cpp,idl imap <expr> <silent> <buffer> <m-;> CTabAlignTo(20).'//'
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au FileType cpp,idl imap <expr> <silent> <buffer> <m-:> CTabAlignTo(30).'//'
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au FileType c imap <expr> <silent> <buffer> <m-;> CTabAlignTo(10).'/* */<left><left>'
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endif
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endif
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if !exists('g:ctab_disable_tab_maps') || ! g:ctab_disable_tab_maps
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exe 'imap '.s:buff_map.'<silent> <expr> <tab> <SID>InsertSmartTab()'
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exe 'inoremap '.s:buff_map.'<silent> <expr> <BS> <SID>DoSmartDelete()."\<BS>"'
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endif
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"exe 'imap '.s:buff_map.'<silent> <expr> <BS> <SID>KeepDelLine()."\<BS>"
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" MRG: TODO
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"exe 'imap '.s:buff_map.'<silent> <expr> <c-d> :call <SID>SmartDeleteTab()<CR>'
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"exe 'imap '.s:buff_map.'<silent> <c-t> <SID>SmartInsertTab()'
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" fun! s:SmartDeleteTab()
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" let curcol=col('.')-&sw
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" let origtxt=getline('.')
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" let repl=matchstr(origtxt,'^\s\{-}\%'.(&sw+2)."v')
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" if repl == '' then
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" return "\<c-o>".':s/ *\zs /'.repeat(' ',(&ts-&sw)).'/'."\<CR>\<c-o>".curcol.'|'
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" else
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" return "\<c-o>".':s/^\s\{-}\%'.(&sw+1)."v//\<CR>\<c-o>".curcol."|"
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" end
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"
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" endfun
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" Insert a smart tab.
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fun! s:InsertSmartTab()
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" Clear the status
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echo ''
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if strpart(getline('.'),0,col('.')-1) =~'^\s*$'
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if exists('b:ctab_hook') && b:ctab_hook != ''
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exe 'return '.b:ctab_hook
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elseif exists('g:ctab_hook') && g:ctab_hook != ''
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exe 'return '.g:ctab_hook
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endif
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return "\<Tab>"
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endif
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let sts=exists("b:insidetabs")?(b:insidetabs):((&sts==0)?&sw:&sts)
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let sp=(virtcol('.') % sts)
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if sp==0 | let sp=sts | endif
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return strpart(" ",0,1+sts-sp)
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endfun
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fun! s:CheckLeaveLine(line)
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if ('cpo' !~ 'I') && exists('b:ctab_lastalign') && (a:line == b:ctab_lastalign)
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s/^\s*$//e
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endif
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endfun
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" Check on blanks
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aug Ctab
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au! InsertLeave * call <SID>CheckLeaveLine(line('.'))
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aug END
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" Do a smart delete.
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" The <BS> is included at the end so that deleting back over line ends
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" works as expected.
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fun! s:DoSmartDelete()
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" Clear the status
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"echo ''
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let uptohere=strpart(getline('.'),0,col('.')-1)
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" If at the first part of the line, fall back on defaults... or if the
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" preceding character is a <TAB>, then similarly fall back on defaults.
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"
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let lastchar=matchstr(uptohere,'.$')
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if lastchar == "\<tab>" || uptohere =~ '^\s*$' | return '' | endif " Simple cases
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if lastchar != ' ' | return ((&digraph)?("\<BS>".lastchar): '') | endif " Delete non space at end / Maintain digraphs
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" Work out how many tabs to use
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let sts=(exists("b:insidetabs")?(b:insidetabs):((&sts==0)?(&sw):(&sts)))
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let ovc=virtcol('.') " Find where we are
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let sp=(ovc % sts) " How many virtual characters to delete
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if sp==0 | let sp=sts | endif " At least delete a whole tabstop
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let vc=ovc-sp " Work out the new virtual column
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" Find how many characters we need to delete (using \%v to do virtual column
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" matching, and making sure we don't pass an invalid value to vc)
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let uthlen=strlen(uptohere)
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let bs= uthlen-((vc<1)?0:( match(uptohere,'\%'.(vc-1).'v')))
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let uthlen=uthlen-bs
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" echo 'ovc = '.ovc.' sp = '.sp.' vc = '.vc.' bs = '.bs.' uthlen='.uthlen
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if bs <= 0 | return '' | endif
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" Delete the specifed number of whitespace characters up to the first non-whitespace
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let ret=''
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let bs=bs-1
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if uptohere[uthlen+bs] !~ '\s'| return '' | endif
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while bs>=-1
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let bs=bs-1
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if uptohere[uthlen+bs] !~ '\s' | break | endif
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let ret=ret."\<BS>"
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endwhile
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return ret
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endfun
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fun! s:Column(line)
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let c=0
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let i=0
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let len=strlen(a:line)
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while i< len
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if a:line[i]=="\<tab>"
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let c=(c+&tabstop)
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let c=c-(c%&tabstop)
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else
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let c=c+1
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endif
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let i=i+1
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endwhile
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return c
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endfun
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fun! s:StartColumn(lineNo)
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return s:Column(matchstr(getline(a:lineNo),'^\s*'))
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endfun
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fun! CTabAlignTo(n)
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let co=virtcol('.')
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let ico=s:StartColumn('.')+a:n
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if co>ico
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let ico=co
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endif
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let spaces=ico-co
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let spc=''
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while spaces > 0
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let spc=spc." "
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let spaces=spaces-1
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endwhile
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return spc
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endfun
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if ! exists('g:ctab_disable_checkalign') || g:ctab_disable_checkalign==0
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" Check the alignment of line.
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" Used in the case where some alignment whitespace is required .. like for unmatched brackets.
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fun! s:CheckAlign(line)
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if &expandtab || !(&autoindent || &indentexpr || &cindent)
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return ''
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endif
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let tskeep=&ts
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let swkeep=&sw
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try
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if a:line == line('.')
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let b:ctab_lastalign=a:line
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else
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unlet b:ctab_lastalign
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endif
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set ts=50
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set sw=50
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if &indentexpr != ''
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let v:lnum=a:line
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sandbox exe 'let inda='.&indentexpr
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if inda == -1
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let inda=indent(a:line-1)
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endif
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elseif &cindent
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let inda=cindent(a:line)
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elseif &lisp
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let inda=lispindent(a:line)
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elseif &autoindent
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let inda=indent(a:line)
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elseif &smarttab
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return ''
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else
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let inda=0
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endif
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finally
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let &ts=tskeep
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let &sw=swkeep
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endtry
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let indatabs=inda / 50
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let indaspace=inda % 50
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let indb=indent(a:line)
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if indatabs*&tabstop + indaspace == indb
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let txtindent=repeat("\<Tab>",indatabs).repeat(' ',indaspace)
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call setline(a:line, substitute(getline(a:line),'^\s*',txtindent,''))
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endif
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return ''
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endfun
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fun! s:SID()
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return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze_SID$')
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endfun
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" Get the spaces at the end of the indent correct.
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" This is trickier than it should be, but this seems to work.
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fun! s:CheckCR()
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" echo 'SID:'.s:SID()
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if getline('.') =~ '^\s*$'
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if ('cpo' !~ 'I') && exists('b:ctab_lastalign') && (line('.') == b:ctab_lastalign)
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return "^\<c-d>\<CR>"
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endif
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return "\<CR>"
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else
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return "\<CR>\<c-r>=<SNR>".s:SID().'_CheckAlign(line(''.''))'."\<CR>\<END>"
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endif
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endfun
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"exe 'inoremap '.s:buff_map.'<silent> <CR> <CR><c-r>=<SID>CheckAlign(line(''.''))."\<lt>END>"<CR>'
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exe 'inoremap '.s:buff_map.'<silent> <expr> <CR> <SID>CheckCR()'
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exe 'nnoremap '.s:buff_map.'<silent> o o<c-r>=<SID>CheckAlign(line(''.''))."\<lt>END>"<CR>'
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exe 'nnoremap '.s:buff_map.'<silent> O O<c-r>=<SID>CheckAlign(line(''.''))."\<lt>END>"<CR>'
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" Ok.. now re-evaluate the = re-indented section
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" The only way I can think to do this is to remap the =
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" so that it calls the original, then checks all the indents.
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exe 'map '.s:buff_map.'<silent> <expr> = <SID>SetupEqual()'
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fun! s:SetupEqual()
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set operatorfunc=CtabRedoIndent
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" Call the operator func so we get the range
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return 'g@'
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endfun
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fun! CtabRedoIndent(type,...)
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set operatorfunc=
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let ln=line("'[")
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let lnto=line("']")
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" Do the original equals
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norm! '[=']
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if ! &et
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" Then check the alignment.
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while ln <= lnto
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silent call s:CheckAlign(ln)
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let ln+=1
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endwhile
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endif
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endfun
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endif
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" Retab the indent of a file - ie only the first nonspace
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fun! s:RetabIndent( bang, firstl, lastl, tab )
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let checkspace=((!&expandtab)? "^\<tab>* ": "^ *\<tab>")
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let l = a:firstl
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let force= a:tab != '' && a:tab != 0 && (a:tab != &tabstop)
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let checkalign = ( &expandtab || !(&autoindent || &indentexpr || &cindent)) && (!exists('g:ctab_disable_checkalign') || g:ctab_disable_checkalign==0)
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let newtabstop = (force?(a:tab):(&tabstop))
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while l <= a:lastl
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let txt=getline(l)
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let store=0
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if a:bang == '!' && txt =~ '\s\+$'
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let txt=substitute(txt,'\s\+$','','')
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let store=1
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endif
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if force || txt =~ checkspace
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let i=indent(l)
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let tabs= (&expandtab ? (0) : (i / newtabstop))
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let spaces=(&expandtab ? (i) : (i % newtabstop))
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let txtindent=repeat("\<tab>",tabs).repeat(' ',spaces)
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let store = 1
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let txt=substitute(txt,'^\s*',txtindent,'')
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endif
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if store
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call setline(l, txt )
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if checkalign
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call s:CheckAlign(l)
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endif
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endif
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let l=l+1
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endwhile
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if newtabstop != &tabstop | let &tabstop = newtabstop | endif
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endfun
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" Retab the indent of a file - ie only the first nonspace.
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" Optional argument specified the value of the new tabstops
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" Bang (!) causes trailing whitespace to be gobbled.
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com! -nargs=? -range=% -bang -bar RetabIndent call <SID>RetabIndent(<q-bang>,<line1>, <line2>, <q-args> )
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" vim: sts=2 sw=2 et
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