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" Vim filetype plugin file
" Language: PDF
" Maintainer: Tim Pope <vimNOSPAM@tpope.info>
" Last Change: 2007 Dec 16
" 2024 May 23 by Riley Bruins <ribru17@gmail.com> ('commentstring')
if exists("b:did_ftplugin")
finish
endif
let b:did_ftplugin = 1
setlocal commentstring=%\ %s
setlocal comments=:%
let b:undo_ftplugin = "setlocal cms< com< | unlet! b:match_words"
if exists("g:loaded_matchit")
let b:match_words = '\<\%(\d\+\s\+\d\+\s\+\)obj\>:\<endobj\>,\<stream$:\<endstream\>,\<xref\>:\<trailer\>,<<:>>'
endif
if exists("g:no_plugin_maps") || exists("g:no_pdf_maps") || v:version < 700
finish
endif
if !exists("b:pdf_tagstack")
let b:pdf_tagstack = []
endif
let b:undo_ftplugin .= " | silent! nunmap <buffer> <C-]> | silent! nunmap <buffer> <C-T>"
nnoremap <silent><buffer> <C-]> :call <SID>Tag()<CR>
" Inline, so the error from an empty tag stack will be simple.
nnoremap <silent><buffer> <C-T> :if len(b:pdf_tagstack) > 0 <Bar> call setpos('.',remove(b:pdf_tagstack, -1)) <Bar> else <Bar> exe "norm! \<Lt>C-T>" <Bar> endif<CR>
function! s:Tag()
call add(b:pdf_tagstack,getpos('.'))
if getline('.') =~ '^\d\+$' && getline(line('.')-1) == 'startxref'
return s:dodigits(getline('.'))
elseif getline('.') =~ '/Prev\s\+\d\+\>\%(\s\+\d\)\@!' && expand("<cword>") =~ '^\d\+$'
return s:dodigits(expand("<cword>"))
elseif getline('.') =~ '^\d\{10\} \d\{5\} '
return s:dodigits(matchstr(getline('.'),'^\d\+'))
else
let line = getline(".")
let lastend = 0
let pat = '\<\d\+\s\+\d\+\s\+R\>'
while lastend >= 0
let beg = match(line,'\C'.pat,lastend)
let end = matchend(line,'\C'.pat,lastend)
if beg < col(".") && end >= col(".")
return s:doobject(matchstr(line,'\C'.pat,lastend))
endif
let lastend = end
endwhile
return s:notag()
endif
endfunction
function! s:doobject(string)
let first = matchstr(a:string,'^\s*\zs\d\+')
let second = matchstr(a:string,'^\s*\d\+\s\+\zs\d\+')
norm! m'
if first != '' && second != ''
let oldline = line('.')
let oldcol = col('.')
1
if !search('^\s*'.first.'\s\+'.second.'\s\+obj\>')
exe oldline
exe 'norm! '.oldcol.'|'
return s:notag()
endif
endif
endfunction
function! s:dodigits(digits)
let digits = 0 + substitute(a:digits,'^0*','','')
norm! m'
if digits <= 0
norm! 1go
else
" Go one character before the destination and advance. This method
" lands us after a newline rather than before, if that is our target.
exe "goto ".(digits)."|norm! 1 "
endif
endfunction
function! s:notag()
silent! call remove(b:pdf_tagstack,-1)
echohl ErrorMsg
echo "E426: tag not found"
echohl NONE
endfunction
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