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Take over maintainership, move it to Vimjas org
[etc/vim.git] / indent / python.vim
diff --git a/indent/python.vim b/indent/python.vim
index 5c701e479bcd437d6c0fe31f34642a1c8aec83dc..8a479f49f265bac94c8c66399cc11481581e2325 100644 (file)
--- a/indent/python.vim
+++ b/indent/python.vim
@@ -1,6 +1,7 @@
 " PEP8 compatible Python indent file
 " Language:         Python
 " PEP8 compatible Python indent file
 " Language:         Python
-" Maintainer:       Hynek Schlawack <hs@ox.cx>
+" Maintainer:       Daniel Hahler <https://daniel.hahler.de/>
+" Prev Maintainer:  Hynek Schlawack <hs@ox.cx>
 " Prev Maintainer:  Eric Mc Sween <em@tomcom.de> (address invalid)
 " Original Author:  David Bustos <bustos@caltech.edu> (address invalid)
 " License:          CC0
 " Prev Maintainer:  Eric Mc Sween <em@tomcom.de> (address invalid)
 " Original Author:  David Bustos <bustos@caltech.edu> (address invalid)
 " License:          CC0
@@ -9,6 +10,7 @@
 " Written in 2004 by David Bustos <bustos@caltech.edu>
 " Maintained from 2004-2005 by Eric Mc Sween <em@tomcom.de>
 " Maintained from 2013 by Hynek Schlawack <hs@ox.cx>
 " Written in 2004 by David Bustos <bustos@caltech.edu>
 " Maintained from 2004-2005 by Eric Mc Sween <em@tomcom.de>
 " Maintained from 2013 by Hynek Schlawack <hs@ox.cx>
+" Maintained from 2017 by Daniel Hahler <https://daniel.hahler.de/>
 "
 " To the extent possible under law, the author(s) have dedicated all copyright
 " and related and neighboring rights to this software to the public domain
 "
 " To the extent possible under law, the author(s) have dedicated all copyright
 " and related and neighboring rights to this software to the public domain
@@ -32,13 +34,19 @@ setlocal tabstop=4
 setlocal softtabstop=4
 setlocal shiftwidth=4
 
 setlocal softtabstop=4
 setlocal shiftwidth=4
 
+if !exists('g:python_pep8_indent_multiline_string')
+    let g:python_pep8_indent_multiline_string = 0
+endif
+
 let s:maxoff = 50
 let s:block_rules = {
             \ '^\s*elif\>': ['if', 'elif'],
 let s:maxoff = 50
 let s:block_rules = {
             \ '^\s*elif\>': ['if', 'elif'],
-            \ '^\s*else\>': ['if', 'elif', 'for', 'try', 'except'],
             \ '^\s*except\>': ['try', 'except'],
             \ '^\s*finally\>': ['try', 'except', 'else']
             \ }
             \ '^\s*except\>': ['try', 'except'],
             \ '^\s*finally\>': ['try', 'except', 'else']
             \ }
+let s:block_rules_multiple = {
+            \ '^\s*else\>': ['if', 'elif', 'for', 'try', 'except'],
+            \ }
 let s:paren_pairs = ['()', '{}', '[]']
 if &ft == 'pyrex' || &ft == 'cython'
     let b:control_statement = '\v^\s*(class|def|if|while|with|for|except|cdef|cpdef)>'
 let s:paren_pairs = ['()', '{}', '[]']
 if &ft == 'pyrex' || &ft == 'cython'
     let b:control_statement = '\v^\s*(class|def|if|while|with|for|except|cdef|cpdef)>'
@@ -136,22 +144,34 @@ function! s:find_start_of_multiline_statement(lnum)
     endwhile
 endfunction
 
     endwhile
 endfunction
 
-" Find the block starter that matches the current line
-function! s:find_start_of_block(lnum, types)
+" Find possible indent(s) of the block starter that matches the current line.
+function! s:find_start_of_block(lnum, types, multiple)
+    let r = []
+    let types = copy(a:types)
     let re = '\V\^\s\*\('.join(a:types, '\|').'\)\>'
     let re = '\V\^\s\*\('.join(a:types, '\|').'\)\>'
-
     let lnum = a:lnum
     let last_indent = indent(lnum) + 1
     while lnum > 0 && last_indent > 0
     let lnum = a:lnum
     let last_indent = indent(lnum) + 1
     while lnum > 0 && last_indent > 0
-        if indent(lnum) < last_indent
-            if getline(lnum) =~# re
-                return lnum
-            endif
+        let indent = indent(lnum)
+        if indent < last_indent
+            for type in types
+                let re = '\v^\s*'.type.'>'
+                if getline(lnum) =~# re
+                    if !a:multiple
+                        return [indent]
+                    endif
+                    if index(r, indent) == -1
+                        let r += [indent]
+                    endif
+                    " Remove any handled type, e.g. 'if'.
+                    call remove(types, index(types, type))
+                endif
+            endfor
             let last_indent = indent(lnum)
         endif
         let lnum = prevnonblank(lnum - 1)
     endwhile
             let last_indent = indent(lnum)
         endif
         let lnum = prevnonblank(lnum - 1)
     endwhile
-    return 0
+    return r
 endfunction
 
 " Is "expr" true for every position in "lnum", beginning at "start"?
 endfunction
 
 " Is "expr" true for every position in "lnum", beginning at "start"?
@@ -212,20 +232,32 @@ endfunction
 " Match indent of first block of this type.
 function! s:indent_like_block(lnum)
     let text = getline(a:lnum)
 " Match indent of first block of this type.
 function! s:indent_like_block(lnum)
     let text = getline(a:lnum)
+    for [multiple, block_rules] in [
+                \ [0, s:block_rules],
+                \ [1, s:block_rules_multiple]]
+        for [line_re, blocks] in items(block_rules)
+            if text !~# line_re
+                continue
+            endif
 
 
-    for [line_re, blocks] in items(s:block_rules)
-        if text !~# line_re
-            continue
-        endif
+            let indents = s:find_start_of_block(a:lnum - 1, blocks, multiple)
+            if !len(indents)
+                return -1
+            endif
+            if len(indents) == 1
+                return indents[0]
+            endif
 
 
-        let lnum = s:find_start_of_block(a:lnum - 1, blocks)
-        if lnum > 0
-            return indent(lnum)
-        else
-            return -1
-        endif
+            " Multiple valid indents, e.g. for 'else' with both try and if.
+            let indent = indent(a:lnum)
+            if index(indents, indent) != -1
+                " The indent is valid, keep it.
+                return indent
+            endif
+            " Fallback to the first/nearest one.
+            return indents[0]
+        endfor
     endfor
     endfor
-
     return -2
 endfunction
 
     return -2
 endfunction
 
@@ -314,28 +346,67 @@ function! s:is_python_string(lnum, ...)
 endfunction
 
 function! GetPythonPEPIndent(lnum)
 endfunction
 
 function! GetPythonPEPIndent(lnum)
-
     " First line has indent 0
     if a:lnum == 1
         return 0
     endif
 
     " First line has indent 0
     if a:lnum == 1
         return 0
     endif
 
+    let line = getline(a:lnum)
+    let prevline = getline(a:lnum-1)
+
     " Multilinestrings: continous, docstring or starting.
     " Multilinestrings: continous, docstring or starting.
-    if s:is_python_string(a:lnum)
+    if s:is_python_string(a:lnum-1, len(prevline))
+                \ && (s:is_python_string(a:lnum, 1)
+                \     || match(line, '^\%("""\|''''''\)') != -1)
+
+        " Indent closing quotes as the line with the opening ones.
+        let match_quotes = match(line, '^\s*\zs\%("""\|''''''\)')
+        if match_quotes != -1
+            " closing multiline string
+            let quotes = line[match_quotes:match_quotes+2]
+            let pairpos = searchpairpos(quotes, '', quotes, 'b')
+            if pairpos[0] != 0
+                return indent(pairpos[0])
+            else
+                " TODO: test to cover this!
+            endif
+        endif
+
         if s:is_python_string(a:lnum-1)
             " Previous line is (completely) a string.
         if s:is_python_string(a:lnum-1)
             " Previous line is (completely) a string.
-            return s:indent_like_previous_line(a:lnum)
+            return indent(a:lnum-1)
         endif
 
         endif
 
-        if match(getline(a:lnum-1), '^\s*\%("""\|''''''\)') != -1
+        if match(prevline, '^\s*\%("""\|''''''\)') != -1
             " docstring.
             " docstring.
-            return s:indent_like_previous_line(a:lnum)
+            return indent(a:lnum-1)
         endif
 
         endif
 
-        if s:is_python_string(a:lnum-1, len(getline(a:lnum-1)))
-            " String started in previous line.
-            return 0
+        let indent_multi = get(b:, 'python_pep8_indent_multiline_string',
+                    \ get(g:, 'python_pep8_indent_multiline_string', 0))
+        if match(prevline, '\v%("""|'''''')$') != -1
+            " Opening multiline string, started in previous line.
+            if (&autoindent && indent(a:lnum) == indent(a:lnum-1))
+                        \ || match(line, '\v^\s+$') != -1
+                " <CR> with empty line or to split up 'foo("""bar' into
+                " 'foo("""' and 'bar'.
+                if indent_multi == -2
+                    return indent(a:lnum-1) + s:sw()
+                endif
+                return indent_multi
+            endif
+        endif
+
+        " Keep existing indent.
+        if match(line, '\v^\s*\S') != -1
+            return -1
+        endif
+
+        if indent_multi != -2
+            return indent_multi
         endif
         endif
+
+        return s:indent_like_opening_paren(a:lnum)
     endif
 
     " Parens: If we can find an open parenthesis/bracket/brace, line up with it.
     endif
 
     " Parens: If we can find an open parenthesis/bracket/brace, line up with it.
vim configuration

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