Add meson support

1 files changed, 183 insertions, 0 deletions

diff --git a/indent/meson.vim b/indent/meson.vim
new file mode 100644
index 00000000..738d86fa
--- /dev/null
+++ b/indent/meson.vim
@@ -0,0 +1,183 @@
+if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'meson') != -1
+  finish
+endif
+
+" Vim indent file
+" Language:		Meson
+" Maintainer:		Nirbheek Chauhan <nirbheek.chauhan@gmail.com>
+" Original Authors:	David Bustos <bustos@caltech.edu>
+"			Bram Moolenaar <Bram@vim.org>
+" Last Change:		2015 Feb 23
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+" Some preliminary settings
+setlocal nolisp		" Make sure lisp indenting doesn't supersede us
+setlocal autoindent	" indentexpr isn't much help otherwise
+
+setlocal indentexpr=GetMesonIndent(v:lnum)
+setlocal indentkeys+==elif,=else,=endforeach,=endif,0)
+
+" Only define the function once.
+if exists("*GetMesonIndent")
+  finish
+endif
+let s:keepcpo= &cpo
+setlocal cpo&vim
+
+" Come here when loading the script the first time.
+
+let s:maxoff = 50	" maximum number of lines to look backwards for ()
+
+function GetMesonIndent(lnum)
+  echom getline(line("."))
+
+  " If this line is explicitly joined: If the previous line was also joined,
+  " line it up with that one, otherwise add two 'shiftwidth'
+  if getline(a:lnum - 1) =~ '\\$'
+    if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$'
+      return indent(a:lnum - 1)
+    endif
+    return indent(a:lnum - 1) + (exists("g:mesonindent_continue") ? eval(g:mesonindent_continue) : (shiftwidth() * 2))
+  endif
+
+  " If the start of the line is in a string don't change the indent.
+  if has('syntax_items')
+	\ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$"
+    return -1
+  endif
+
+  " Search backwards for the previous non-empty line.
+  let plnum = prevnonblank(v:lnum - 1)
+
+  if plnum == 0
+    " This is the first non-empty line, use zero indent.
+    return 0
+  endif
+
+  " If the previous line is inside parenthesis, use the indent of the starting
+  " line.
+  " Trick: use the non-existing "dummy" variable to break out of the loop when
+  " going too far back.
+  call cursor(plnum, 1)
+  let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW',
+	  \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :"
+	  \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+	  \ . " =~ '\\(Comment\\|Todo\\|String\\)$'")
+  if parlnum > 0
+    let plindent = indent(parlnum)
+    let plnumstart = parlnum
+  else
+    let plindent = indent(plnum)
+    let plnumstart = plnum
+  endif
+
+
+  " When inside parenthesis: If at the first line below the parenthesis add
+  " a 'shiftwidth', otherwise same as previous line.
+  " i = (a
+  "       + b
+  "       + c)
+  call cursor(a:lnum, 1)
+  let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
+	  \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
+	  \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+	  \ . " =~ '\\(Comment\\|Todo\\|String\\)$'")
+  if p > 0
+    if p == plnum
+      " When the start is inside parenthesis, only indent one 'shiftwidth'.
+      let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
+	  \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
+	  \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+	  \ . " =~ '\\(Comment\\|Todo\\|String\\)$'")
+      if pp > 0
+	return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : shiftwidth())
+      endif
+      return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : shiftwidth())
+    endif
+    if plnumstart == p
+      return indent(plnum)
+    endif
+    return plindent
+  endif
+
+
+  " Get the line and remove a trailing comment.
+  " Use syntax highlighting attributes when possible.
+  let pline = getline(plnum)
+  let pline_len = strlen(pline)
+  if has('syntax_items')
+    " If the last character in the line is a comment, do a binary search for
+    " the start of the comment.  synID() is slow, a linear search would take
+    " too long on a long line.
+    if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$"
+      let min = 1
+      let max = pline_len
+      while min < max
+	let col = (min + max) / 2
+	if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$"
+	  let max = col
+	else
+	  let min = col + 1
+	endif
+      endwhile
+      let pline = strpart(pline, 0, min - 1)
+    endif
+  else
+    let col = 0
+    while col < pline_len
+      if pline[col] == '#'
+	let pline = strpart(pline, 0, col)
+	break
+      endif
+      let col = col + 1
+    endwhile
+  endif
+
+  " If the previous line ended the conditional/loop
+  if getline(plnum) =~ '^\s*\(endif\|endforeach\)\>\s*'
+    " Maintain indent
+    return -1
+  endif
+
+  " If the previous line ended with a builtin, indent this line
+  if pline =~ '^\s*\(foreach\|if\|else\|elif\)\>\s*'
+    return plindent + shiftwidth()
+  endif
+
+  " If the current line begins with a header keyword, deindent
+  if getline(a:lnum) =~ '^\s*\(else\|elif\|endif\|endforeach\)'
+
+    " Unless the previous line was a one-liner
+    if getline(plnumstart) =~ '^\s*\(foreach\|if\)\>\s*'
+      return plindent
+    endif
+
+    " Or the user has already dedented
+    if indent(a:lnum) <= plindent - shiftwidth()
+      return -1
+    endif
+
+    return plindent - shiftwidth()
+  endif
+
+  " When after a () construct we probably want to go back to the start line.
+  " a = (b
+  "       + c)
+  " here
+  if parlnum > 0
+    return plindent
+  endif
+
+  return -1
+
+endfunction
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+" vim:sw=2