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vim9script
# Vim indent plugin file
# Language: Odin
# Maintainer: Maxim Kim <habamax@gmail.com>
# Website: https://github.com/habamax/vim-odin
# Last Change: 2024-01-15
if exists("b:did_indent")
finish
endif
b:did_indent = 1
b:undo_indent = 'setlocal cindent< cinoptions< cinkeys< indentexpr<'
setlocal cindent
setlocal cinoptions=L0,m1,(s,j1,J1,l1,+0,:0,#1
setlocal cinkeys=0{,0},0),0],!^F,:,o,O
setlocal indentexpr=GetOdinIndent(v:lnum)
def PrevLine(lnum: number): number
var plnum = lnum - 1
var pline: string
while plnum > 1
plnum = prevnonblank(plnum)
pline = getline(plnum)
# XXX: take into account nested multiline /* /* */ */ comments
if pline =~ '\*/\s*$'
while getline(plnum) !~ '/\*' && plnum > 1
plnum -= 1
endwhile
if getline(plnum) =~ '^\s*/\*'
plnum -= 1
else
break
endif
elseif pline =~ '^\s*//'
plnum -= 1
else
break
endif
endwhile
return plnum
enddef
def GetOdinIndent(lnum: number): number
var plnum = PrevLine(lnum)
var pline = getline(plnum)
var pindent = indent(plnum)
# workaround of cindent "hang"
# if the previous line looks like:
# : #{}
# : #whatever{whateverelse}
# and variations where : # { } are in the string
# cindent(lnum) hangs
if pline =~ ':\s\+#.*{.*}'
return pindent
endif
var indent = cindent(lnum)
var line = getline(lnum)
if line =~ '^\s*#\k\+'
if pline =~ '[{:]\s*$'
indent = pindent + shiftwidth()
else
indent = pindent
endif
elseif pline =~ 'switch\s.*{\s*$'
indent = pindent
elseif pline =~ 'case\s*.*,\s*\(//.*\)\?$' # https://github.com/habamax/vim-odin/issues/8
indent = pindent + matchstr(pline, 'case\s*')->strcharlen()
elseif line =~ '^\s*case\s\+.*,\s*$'
indent = pindent - shiftwidth()
elseif pline =~ 'case\s*.*:\s*\(//.*\)\?$'
if line !~ '^\s*}\s*$' && line !~ '^\s*case[[:space:]:]'
indent = pindent + shiftwidth()
endif
elseif pline =~ '^\s*@.*' && line !~ '^\s*}'
indent = pindent
elseif pline =~ ':[:=].*}\s*$'
indent = pindent
elseif pline =~ '^\s*}\s*$'
if line !~ '^\s*}' && line !~ 'case\s*.*:\s*$'
indent = pindent
else
indent = pindent - shiftwidth()
endif
elseif pline =~ '\S:\s*$'
# looking up for a case something,
# whatever,
# anything:
# ... 20 lines before
for idx in range(plnum - 1, plnum - 21, -1)
if plnum < 1
break
endif
if getline(idx) =~ '^\s*case\s.*,\s*$'
indent = indent(idx) + shiftwidth()
break
endif
endfor
elseif pline =~ '{[^{]*}\s*$' && line !~ '^\s*[})]\s*$' # https://github.com/habamax/vim-odin/issues/2
indent = pindent
elseif pline =~ '^\s*}\s*$' # https://github.com/habamax/vim-odin/issues/3
# Find line with opening { and check if there is a label:
# If there is, return indent of the closing }
cursor(plnum, 1)
silent normal! %
var brlnum = line('.')
var brline = getline('.')
if plnum != brlnum && (brline =~ '^\s*\k\+:\s\+for' || brline =~ '^\s*\k\+\s*:=')
indent = pindent
endif
endif
return indent
enddef
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