1 files changed, 130 insertions, 0 deletions
diff --git a/runtime/indent/krl.vim b/runtime/indent/krl.vim
new file mode 100644
index 0000000..cc3cbd1
--- /dev/null
+++ b/runtime/indent/krl.vim
@@ -0,0 +1,130 @@
+" Vim indent file
+" Language: Kuka Robot Language
+" Maintainer: Patrick Meiser-Knosowski <knosowski@graeffrobotics.de>
+" Version: 3.0.0
+" Last Change: 15. Apr 2022
+" Credits: Based on indent/vim.vim
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+setlocal nolisp
+setlocal nocindent
+setlocal nosmartindent
+setlocal autoindent
+setlocal indentexpr=GetKrlIndent()
+setlocal indentkeys=!^F,o,O,=~end,0=~else,0=~case,0=~default,0=~until,0=~continue,=~part
+let b:undo_indent = "setlocal lisp< cindent< smartindent< autoindent< indentexpr< indentkeys<"
+
+if get(g:,'krlSpaceIndent',1)
+  " Use spaces, not tabs, for indention, 2 is enough. 
+  " More or even tabs would waste valuable space on the teach pendant.
+  setlocal softtabstop=2
+  setlocal shiftwidth=2
+  setlocal expandtab
+  setlocal shiftround
+  let b:undo_indent = b:undo_indent." softtabstop< shiftwidth< expandtab< shiftround<"
+endif
+
+" Only define the function once.
+if exists("*GetKrlIndent")
+  finish
+endif
+let s:keepcpo = &cpo
+set cpo&vim
+
+function GetKrlIndent() abort
+
+  let currentLine = getline(v:lnum)
+  if  currentLine =~? '\v^;(\s*(end)?fold>)@!' && !get(g:, 'krlCommentIndent', 0)
+    " If current line has a ; in column 1 and is no fold, keep zero indent.
+    " This may be usefull if code is commented out at the first column.
+    return 0
+  endif
+
+  " Find a non-blank line above the current line.
+  let preNoneBlankLineNum = s:KrlPreNoneBlank(v:lnum - 1)
+  if  preNoneBlankLineNum == 0
+    " At the start of the file use zero indent.
+    return 0
+  endif
+
+  let preNoneBlankLine = getline(preNoneBlankLineNum)
+  let ind = indent(preNoneBlankLineNum)
+
+  " Define add 'shiftwidth' pattern
+  let addShiftwidthPattern =           '\v^\s*('
+  if get(g:, 'krlIndentBetweenDef', 1)
+    let addShiftwidthPattern ..=               '(global\s+)?def(fct|dat)?\s+\$?\w'
+    let addShiftwidthPattern ..=               '|'
+  endif
+  let addShiftwidthPattern   ..=               'if>|while>|for>|loop>'
+  let addShiftwidthPattern   ..=               '|else>'
+  let addShiftwidthPattern   ..=               '|case>|default>'
+  let addShiftwidthPattern   ..=               '|repeat>'
+  let addShiftwidthPattern   ..=               '|skip>|(ptp_)?spline>'
+  let addShiftwidthPattern   ..=               '|time_block\s+(start|part)>'
+  let addShiftwidthPattern   ..=               '|const_vel\s+start>'
+  let addShiftwidthPattern   ..=             ')'
+
+  " Define Subtract 'shiftwidth' pattern
+  let subtractShiftwidthPattern =      '\v^\s*('
+  if get(g:, 'krlIndentBetweenDef', 1)
+    let subtractShiftwidthPattern ..=          'end(fct|dat)?>'
+    let subtractShiftwidthPattern ..=          '|'
+  endif
+  let subtractShiftwidthPattern   ..=          'end(if|while|for|loop)>'
+  let subtractShiftwidthPattern   ..=          '|else>'
+  let subtractShiftwidthPattern   ..=          '|case>|default>|endswitch>'
+  let subtractShiftwidthPattern   ..=          '|until>'
+  let subtractShiftwidthPattern   ..=          '|end(skip|spline)>'
+  let subtractShiftwidthPattern   ..=          '|time_block\s+(part|end)>'
+  let subtractShiftwidthPattern   ..=          '|const_vel\s+end>'
+  let subtractShiftwidthPattern   ..=        ')'
+
+  " Add shiftwidth
+  if preNoneBlankLine =~? addShiftwidthPattern
+    let ind += &sw
+  endif
+
+  " Subtract shiftwidth
+  if currentLine =~? subtractShiftwidthPattern
+    let ind = ind - &sw
+  endif
+
+  " First case after a switch gets the indent of the switch.
+  if currentLine =~? '\v^\s*case>'  
+        \&& preNoneBlankLine =~? '\v^\s*switch>'
+    let ind = ind + &sw
+  endif
+
+  " align continue with the following instruction
+  if currentLine =~? '\v^\s*continue>'  
+        \&& getline(v:lnum + 1) =~? subtractShiftwidthPattern
+    let ind = ind - &sw
+  endif
+
+  return ind
+endfunction
+
+" This function works almost like prevnonblank() but handles &-headers,
+" comments and continue instructions like blank lines
+function s:KrlPreNoneBlank(lnum) abort
+
+  let nPreNoneBlank = prevnonblank(a:lnum)
+
+  while nPreNoneBlank > 0 && getline(nPreNoneBlank) =~? '\v^\s*(\&\w\+|;|continue>)'
+    " Previouse none blank line irrelevant. Look further aback.
+    let nPreNoneBlank = prevnonblank(nPreNoneBlank - 1)
+  endwhile
+
+  return nPreNoneBlank
+endfunction
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+" vim:sw=2 sts=2 et