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|
" Vim indent file
" Language: Perl
" Maintainer: vim-perl <vim-perl@googlegroups.com>
" Homepage: https://github.com/vim-perl/vim-perl
" Bugs/requests: https://github.com/vim-perl/vim-perl/issues
" License: Vim License (see :help license)
" Last Change: 2021 Sep 24
" Suggestions and improvements by :
" Aaron J. Sherman (use syntax for hints)
" Artem Chuprina (play nice with folding)
" TODO things that are not or not properly indented (yet) :
" - Continued statements
" print "foo",
" "bar";
" print "foo"
" if bar();
" - Multiline regular expressions (m//x)
" (The following probably needs modifying the perl syntax file)
" - qw() lists
" - Heredocs with terminators that don't match \I\i*
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
" Is syntax highlighting active ?
let b:indent_use_syntax = has("syntax")
setlocal indentexpr=GetPerlIndent()
setlocal indentkeys+=0=,0),0],0=or,0=and
if !b:indent_use_syntax
setlocal indentkeys+=0=EO
endif
let b:undo_indent = "setl inde< indk<"
let s:cpo_save = &cpo
set cpo-=C
function! GetPerlIndent()
" Get the line to be indented
let cline = getline(v:lnum)
" Indent POD markers to column 0
if cline =~ '^\s*=\L\@!'
return 0
endif
" Get current syntax item at the line's first char
let csynid = ''
if b:indent_use_syntax
let csynid = synIDattr(synID(v:lnum,1,0),"name")
endif
" Don't reindent POD and heredocs
if csynid == "perlPOD" || csynid == "perlHereDoc" || csynid =~ "^pod"
return indent(v:lnum)
endif
" Indent end-of-heredocs markers to column 0
if b:indent_use_syntax
" Assumes that an end-of-heredoc marker matches \I\i* to avoid
" confusion with other types of strings
if csynid == "perlStringStartEnd" && cline =~ '^\I\i*$'
return 0
endif
else
" Without syntax hints, assume that end-of-heredocs markers begin with EO
if cline =~ '^\s*EO'
return 0
endif
endif
" Now get the indent of the previous perl line.
" Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
" Hit the start of the file, use zero indent.
if lnum == 0
return 0
endif
let line = getline(lnum)
let ind = indent(lnum)
" Skip heredocs, POD, and comments on 1st column
if b:indent_use_syntax
let skippin = 2
while skippin
let synid = synIDattr(synID(lnum,1,0),"name")
if (synid == "perlStringStartEnd" && line =~ '^\I\i*$')
\ || (skippin != 2 && synid == "perlPOD")
\ || (skippin != 2 && synid == "perlHereDoc")
\ || synid == "perlComment"
\ || synid =~ "^pod"
let lnum = prevnonblank(lnum - 1)
if lnum == 0
return 0
endif
let line = getline(lnum)
let ind = indent(lnum)
let skippin = 1
else
let skippin = 0
endif
endwhile
else
if line =~ "^EO"
let lnum = search("<<[\"']\\=EO", "bW")
let line = getline(lnum)
let ind = indent(lnum)
endif
endif
" Indent blocks enclosed by {}, (), or []
if b:indent_use_syntax
" Find a real opening brace
" NOTE: Unlike Perl character classes, we do NOT need to escape the
" closing brackets with a backslash. Doing so just puts a backslash
" in the character class and causes sorrow. Instead, put the closing
" bracket as the first character in the class.
let braceclass = '[][(){}]'
let bracepos = match(line, braceclass, matchend(line, '^\s*[])}]'))
while bracepos != -1
let synid = synIDattr(synID(lnum, bracepos + 1, 0), "name")
" If the brace is highlighted in one of those groups, indent it.
" 'perlHereDoc' is here only to handle the case '&foo(<<EOF)'.
if synid == ""
\ || synid == "perlMatchStartEnd"
\ || synid == "perlHereDoc"
\ || synid == "perlBraces"
\ || synid == "perlStatementIndirObj"
\ || synid =~ "^perlFiledescStatement"
\ || synid =~ '^perl\(Sub\|Block\|Package\)Fold'
let brace = strpart(line, bracepos, 1)
if brace == '(' || brace == '{' || brace == '['
let ind = ind + shiftwidth()
else
let ind = ind - shiftwidth()
endif
endif
let bracepos = match(line, braceclass, bracepos + 1)
endwhile
let bracepos = matchend(cline, '^\s*[])}]')
if bracepos != -1
let synid = synIDattr(synID(v:lnum, bracepos, 0), "name")
if synid == ""
\ || synid == "perlMatchStartEnd"
\ || synid == "perlBraces"
\ || synid == "perlStatementIndirObj"
\ || synid =~ '^perl\(Sub\|Block\|Package\)Fold'
let ind = ind - shiftwidth()
endif
endif
else
if line =~ '[{[(]\s*\(#[^])}]*\)\=$'
let ind = ind + shiftwidth()
endif
if cline =~ '^\s*[])}]'
let ind = ind - shiftwidth()
endif
endif
" Indent lines that begin with 'or' or 'and'
if cline =~ '^\s*\(or\|and\)\>'
if line !~ '^\s*\(or\|and\)\>'
let ind = ind + shiftwidth()
endif
elseif line =~ '^\s*\(or\|and\)\>'
let ind = ind - shiftwidth()
endif
return ind
endfunction
let &cpo = s:cpo_save
unlet s:cpo_save
" vim:ts=8:sts=4:sw=4:expandtab:ft=vim
|
