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