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Initial import from svn.
author Augie Fackler <durin42@gmail.com>
date Wed, 26 Nov 2008 10:56:09 -0600
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-1:000000000000 0:c30d68fbd368
1 " Python indent file
2 " Language: Python
3 " Maintainer: Eric Mc Sween <em@tomcom.de>
4 " Original Author: David Bustos <bustos@caltech.edu>
5 " Last Change: 2004 Jun 07
6
7 " Only load this indent file when no other was loaded.
8 if exists("b:did_indent")
9 finish
10 endif
11 let b:did_indent = 1
12
13 setlocal expandtab
14 setlocal nolisp
15 setlocal autoindent
16 setlocal indentexpr=GetPythonIndent(v:lnum)
17 setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except,0#
18
19
20 let s:maxoff = 50
21
22 " Find backwards the closest open parenthesis/bracket/brace.
23 function! s:SearchParensPair()
24 let line = line('.')
25 let col = col('.')
26
27 " Skip strings and comments and don't look too far
28 let skip = "line('.') < " . (line - s:maxoff) . " ? dummy :" .
29 \ 'synIDattr(synID(line("."), col("."), 0), "name") =~? ' .
30 \ '"string\\|comment"'
31
32 " Search for parentheses
33 call cursor(line, col)
34 let parlnum = searchpair('(', '', ')', 'bW', skip)
35 let parcol = col('.')
36
37 " Search for brackets
38 call cursor(line, col)
39 let par2lnum = searchpair('\[', '', '\]', 'bW', skip)
40 let par2col = col('.')
41
42 " Search for braces
43 call cursor(line, col)
44 let par3lnum = searchpair('{', '', '}', 'bW', skip)
45 let par3col = col('.')
46
47 " Get the closest match
48 if par2lnum > parlnum || (par2lnum == parlnum && par2col > parcol)
49 let parlnum = par2lnum
50 let parcol = par2col
51 endif
52 if par3lnum > parlnum || (par3lnum == parlnum && par3col > parcol)
53 let parlnum = par3lnum
54 let parcol = par3col
55 endif
56
57 " Put the cursor on the match
58 if parlnum > 0
59 call cursor(parlnum, parcol)
60 endif
61 return parlnum
62 endfunction
63
64 " Find the start of a multi-line statement
65 function! s:StatementStart(lnum)
66 let lnum = a:lnum
67 while 1
68 if getline(lnum - 1) =~ '\\$'
69 let lnum = lnum - 1
70 else
71 call cursor(lnum, 1)
72 let maybe_lnum = s:SearchParensPair()
73 if maybe_lnum < 1
74 return lnum
75 else
76 let lnum = maybe_lnum
77 endif
78 endif
79 endwhile
80 endfunction
81
82 " Find the block starter that matches the current line
83 function! s:BlockStarter(lnum, block_start_re)
84 let lnum = a:lnum
85 let maxindent = 10000 " whatever
86 while lnum > 1
87 let lnum = prevnonblank(lnum - 1)
88 if indent(lnum) < maxindent
89 if getline(lnum) =~ a:block_start_re
90 return lnum
91 else
92 let maxindent = indent(lnum)
93 " It's not worth going further if we reached the top level
94 if maxindent == 0
95 return -1
96 endif
97 endif
98 endif
99 endwhile
100 return -1
101 endfunction
102
103 function! GetPythonIndent(lnum)
104
105 " First line has indent 0
106 if a:lnum == 1
107 return 0
108 endif
109
110 " If we can find an open parenthesis/bracket/brace, line up with it.
111 call cursor(a:lnum, 1)
112 let parlnum = s:SearchParensPair()
113 if parlnum > 0
114 let parcol = col('.')
115 let closing_paren = match(getline(a:lnum), '^\s*[])}]') != -1
116 if match(getline(parlnum), '[([{]\s*$', parcol - 1) != -1
117 if closing_paren
118 return indent(parlnum)
119 else
120 return indent(parlnum) + &shiftwidth
121 endif
122 else
123 if closing_paren
124 return parcol - 1
125 else
126 return parcol
127 endif
128 endif
129 endif
130
131 " Examine this line
132 let thisline = getline(a:lnum)
133 let thisindent = indent(a:lnum)
134
135 " If the line starts with 'elif' or 'else', line up with 'if' or 'elif'
136 if thisline =~ '^\s*\(elif\|else\)\>'
137 let bslnum = s:BlockStarter(a:lnum, '^\s*\(if\|elif\)\>')
138 if bslnum > 0
139 return indent(bslnum)
140 else
141 return -1
142 endif
143 endif
144
145 " If the line starts with 'except' or 'finally', line up with 'try'
146 " or 'except'
147 if thisline =~ '^\s*\(except\|finally\)\>'
148 let bslnum = s:BlockStarter(a:lnum, '^\s*\(try\|except\)\>')
149 if bslnum > 0
150 return indent(bslnum)
151 else
152 return -1
153 endif
154 endif
155
156 " Examine previous line
157 let plnum = a:lnum - 1
158 let pline = getline(plnum)
159 let sslnum = s:StatementStart(plnum)
160
161 " If the previous line is blank, keep the same indentation
162 if pline =~ '^\s*$'
163 return -1
164 endif
165
166 " If this line is explicitly joined, try to find an indentation that looks
167 " good.
168 if pline =~ '\\$'
169 let compound_statement = '^\s*\(if\|while\|for\s.*\sin\|except\)\s*'
170 let maybe_indent = matchend(getline(sslnum), compound_statement)
171 if maybe_indent != -1
172 return maybe_indent
173 else
174 return indent(sslnum) + &sw * 2
175 endif
176 endif
177
178 " If the previous line ended with a colon, indent relative to
179 " statement start.
180 if pline =~ ':\s*$'
181 return indent(sslnum) + &sw
182 endif
183
184 " If the previous line was a stop-execution statement or a pass
185 if getline(sslnum) =~ '^\s*\(break\|continue\|raise\|return\|pass\)\>'
186 " See if the user has already dedented
187 if indent(a:lnum) > indent(sslnum) - &sw
188 " If not, recommend one dedent
189 return indent(sslnum) - &sw
190 endif
191 " Otherwise, trust the user
192 return -1
193 endif
194
195 " In all other cases, line up with the start of the previous statement.
196 return indent(sslnum)
197 endfunction