summaryrefslogtreecommitdiff
path: root/runtime/indent/cmake.vim
blob: a1ad832f24c7cecdbbbc57c9bc69129a74cc856a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
" =============================================================================
" 
"   Program:   CMake - Cross-Platform Makefile Generator
"   Module:    $RCSfile$
"   Language:  VIM
"   Date:      $Date$
"   Version:   $Revision$
" 
" =============================================================================

" Vim indent file
" Language:     CMake (ft=cmake)
" Author:       Andy Cedilnik <andy.cedilnik@kitware.com>
" Maintainer:   Andy Cedilnik <andy.cedilnik@kitware.com>
" Last Change:  $Date$
" Version:      $Revision$
"
" Licence:      The CMake license applies to this file. See
"               http://www.cmake.org/HTML/Copyright.html
"               This implies that distribution with Vim is allowed

if exists("b:did_indent")
  finish
endif
let b:did_indent = 1

setlocal indentexpr=CMakeGetIndent(v:lnum)

" Only define the function once.
if exists("*CMakeGetIndent")
  finish
endif

fun! CMakeGetIndent(lnum)
  let this_line = getline(a:lnum)

  " Find a non-blank line above the current line.
  let lnum = a:lnum
  let lnum = prevnonblank(lnum - 1)
  let previous_line = getline(lnum)

  " Hit the start of the file, use zero indent.
  if lnum == 0
    return 0
  endif

  let ind = indent(lnum)

  let or = '\|'
  " Regular expressions used by line indentation function.
  let cmake_regex_comment = '#.*'
  let cmake_regex_identifier = '[A-Za-z][A-Za-z0-9_]*'
  let cmake_regex_quoted = '"\([^"\\]\|\\.\)*"'
  let cmake_regex_arguments = '\(' . cmake_regex_quoted .
                    \       or . '\$(' . cmake_regex_identifier . ')' .
                    \       or . '[^()\\#"]' . or . '\\.' . '\)*'

  let cmake_indent_comment_line = '^\s*' . cmake_regex_comment
  let cmake_indent_blank_regex = '^\s*$'
  let cmake_indent_open_regex = '^\s*' . cmake_regex_identifier .
                    \           '\s*(' . cmake_regex_arguments .
                    \           '\(' . cmake_regex_comment . '\)\?$'

  let cmake_indent_close_regex = '^' . cmake_regex_arguments .
                    \            ')\s*' .
                    \            '\(' . cmake_regex_comment . '\)\?$'

  let cmake_indent_begin_regex = '^\s*\(IF\|MACRO\|FOREACH\|ELSE\|WHILE\)\s*('
  let cmake_indent_end_regex = '^\s*\(ENDIF\|ENDFOREACH\|ENDMACRO\|ELSE\|ENDWHILE\)\s*('

  " Add
  if previous_line =~? cmake_indent_comment_line " Handle comments
    let ind = ind
  else
    if previous_line =~? cmake_indent_begin_regex
      let ind = ind + &sw
    endif
    if previous_line =~? cmake_indent_open_regex
      let ind = ind + &sw
    endif
  endif

  " Subtract
  if this_line =~? cmake_indent_end_regex
    let ind = ind - &sw
  endif
  if previous_line =~? cmake_indent_close_regex
    let ind = ind - &sw
  endif

  return ind
endfun