Add lilypond support, closes #278

1 files changed, 64 insertions, 0 deletions

diff --git a/indent/lilypond.vim b/indent/lilypond.vim
new file mode 100644
index 00000000..169a6758
--- /dev/null
+++ b/indent/lilypond.vim
@@ -0,0 +1,64 @@
+if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'lilypond') != -1
+  finish
+endif
+
+" LilyPond indent file
+" Language:     LilyPond
+" Maintainer:   Heikki Junes <hjunes@cc.hut.fi>
+" Last Change:  2010 Jul 26
+"
+" Installed As:	vim/indent/lilypond.vim
+"
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+setlocal indentexpr=GetLilyPondIndent()
+setlocal indentkeys=o,O,},>>,!^F
+
+" Only define the function once.
+if exists("*GetLilyPondIndent")
+  finish
+endif
+
+function GetLilyPondIndent()
+  if v:lnum == 1
+    return 0
+  endif
+
+  "Find a non-blank line above the current line.
+  let lnum = prevnonblank(v:lnum - 1)
+  "Check if a block was started: '{' or '<<' is the last non-blank character of the previous line.
+  if getline(lnum) =~ '^.*\({\|<<\)\s*$'
+    let ind = indent(lnum) + &sw
+  else
+    let ind = indent(lnum)
+  endif
+
+  "Check if a block was ended: '}' or '>>' is the first non-blank character of the current line.
+  if getline(v:lnum) =~ '^\s*\(}\|>>\)'
+    let ind = ind - &sw
+  endif
+
+  " Check if the first character from the previous line is within
+  " a `lilyScheme' region, and if so, use lisp-style indentation
+  " for the current line.
+  "
+  " TODO:
+  "   - Only works in version 7.1.215 or later, though it should
+  "     silently fail in older versions.
+  "   - We should support `lilyScheme' regions that begin in the
+  "     middle of the line, too.
+  for id in synstack(lnum, 1)
+    if synIDattr(id, "name") == "lilyScheme"
+      let ind = lispindent(v:lnum)
+    endif
+  endfor
+
+  return ind
+endfunction
+"
+"
+"