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" Vim indent file
" Language: R Documentation (Help), *.Rd
" Author: Jakson Alves de Aquino <jalvesaq@gmail.com>
" Homepage: https://github.com/jalvesaq/R-Vim-runtime
" Last Change: Feb 25, 2023
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
runtime indent/r.vim
let s:RIndent = function(substitute(&indentexpr, "()", "", ""))
let b:did_indent = 1
setlocal noautoindent
setlocal nocindent
setlocal nosmartindent
setlocal nolisp
setlocal indentkeys=0{,0},:,!^F,o,O,e
setlocal indentexpr=GetCorrectRHelpIndent()
let b:undo_indent = "setl ai< cin< inde< indk< <lisp <si"
" Only define the functions once.
if exists("*GetRHelpIndent")
finish
endif
function s:SanitizeRHelpLine(line)
let newline = substitute(a:line, '\\\\', "x", "g")
let newline = substitute(newline, '\\{', "x", "g")
let newline = substitute(newline, '\\}', "x", "g")
let newline = substitute(newline, '\\%', "x", "g")
let newline = substitute(newline, '%.*', "", "")
let newline = substitute(newline, '\s*$', "", "")
return newline
endfunction
function GetRHelpIndent()
let clnum = line(".") " current line
if clnum == 1
return 0
endif
let cline = getline(clnum)
if cline =~ '^\s*}\s*$'
let i = clnum
let bb = -1
while bb != 0 && i > 1
let i -= 1
let line = s:SanitizeRHelpLine(getline(i))
let line2 = substitute(line, "{", "", "g")
let openb = strlen(line) - strlen(line2)
let line3 = substitute(line2, "}", "", "g")
let closeb = strlen(line2) - strlen(line3)
let bb += openb - closeb
endwhile
return indent(i)
endif
if cline =~ '^\s*#ifdef\>' || cline =~ '^\s*#endif\>'
return 0
endif
let lnum = clnum - 1
let line = getline(lnum)
if line =~ '^\s*#ifdef\>' || line =~ '^\s*#endif\>'
let lnum -= 1
let line = getline(lnum)
endif
while lnum > 1 && (line =~ '^\s*$' || line =~ '^#ifdef' || line =~ '^#endif')
let lnum -= 1
let line = getline(lnum)
endwhile
if lnum == 1
return 0
endif
let line = s:SanitizeRHelpLine(line)
let line2 = substitute(line, "{", "", "g")
let openb = strlen(line) - strlen(line2)
let line3 = substitute(line2, "}", "", "g")
let closeb = strlen(line2) - strlen(line3)
let bb = openb - closeb
let ind = indent(lnum) + (bb * shiftwidth())
if line =~ '^\s*}\s*$'
let ind = indent(lnum)
endif
if ind < 0
return 0
endif
return ind
endfunction
function GetCorrectRHelpIndent()
let lastsection = search('^\\[a-z]*{', "bncW")
let secname = getline(lastsection)
if secname =~ '^\\usage{' || secname =~ '^\\examples{' || secname =~ '^\\dontshow{' || secname =~ '^\\dontrun{' || secname =~ '^\\donttest{' || secname =~ '^\\testonly{' || secname =~ '^\\method{.*}{.*}('
return s:RIndent()
else
return GetRHelpIndent()
endif
endfunction
" vim: sw=2
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