Fix multiline handling with blank lines (#111)

[etc/vim.git] / indent / python.vim

diff --git a/indent/python.vim b/indent/python.vim
index b3a514117ca0a544adebc69ff246166bde8f4a68..8444a226a57d06d63a6e452ae5098e907a2fae56 100644 (file)
--- a/indent/python.vim
+++ b/indent/python.vim
@@ -20,25 +20,24 @@
 " <http://creativecommons.org/publicdomain/zero/1.0/>.
 
 " Only load this indent file when no other was loaded.
 " <http://creativecommons.org/publicdomain/zero/1.0/>.
 
 " Only load this indent file when no other was loaded.

-if exists("b:did_indent")
+if exists('b:did_indent')

     finish
 endif
 let b:did_indent = 1
 
     finish
 endif
 let b:did_indent = 1
 

-setlocal expandtab

 setlocal nolisp
 setlocal autoindent
 setlocal indentexpr=GetPythonPEPIndent(v:lnum)
 setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except
 setlocal nolisp
 setlocal autoindent
 setlocal indentexpr=GetPythonPEPIndent(v:lnum)
 setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except

-setlocal tabstop=4
-setlocal softtabstop=4
-setlocal shiftwidth=4

 
 if !exists('g:python_pep8_indent_multiline_string')
     let g:python_pep8_indent_multiline_string = 0
 endif
 
 
 if !exists('g:python_pep8_indent_multiline_string')
     let g:python_pep8_indent_multiline_string = 0
 endif
 

-let s:maxoff = 50
+if !exists('g:python_pep8_indent_hang_closing')
+    let g:python_pep8_indent_hang_closing = 0
+endif
+

 let s:block_rules = {
             \ '^\s*elif\>': ['if', 'elif'],
             \ '^\s*except\>': ['try', 'except'],
 let s:block_rules = {
             \ '^\s*elif\>': ['if', 'elif'],
             \ '^\s*except\>': ['try', 'except'],


@@ -47,8 +46,11 @@ let s:block_rules = {
 let s:block_rules_multiple = {
             \ '^\s*else\>': ['if', 'elif', 'for', 'try', 'except'],
             \ }
 let s:block_rules_multiple = {
             \ '^\s*else\>': ['if', 'elif', 'for', 'try', 'except'],
             \ }

-let s:paren_pairs = ['()', '{}', '[]']
-if &ft == 'pyrex' || &ft == 'cython'
+" Pairs to look for when searching for opening parenthesis.
+" The value is the maximum offset in lines.
+let s:paren_pairs = {'()': 50, '[]': 100, '{}': 1000}
+
+if &filetype ==# 'pyrex' || &filetype ==# 'cython'

     let b:control_statement = '\v^\s*(class|def|if|while|with|for|except|cdef|cpdef)>'
 else
     let b:control_statement = '\v^\s*(class|def|if|while|with|for|except)>'
     let b:control_statement = '\v^\s*(class|def|if|while|with|for|except|cdef|cpdef)>'
 else
     let b:control_statement = '\v^\s*(class|def|if|while|with|for|except)>'


@@ -86,18 +88,10 @@ if exists('*shiftwidth')
     endfunction
 else
     function! s:sw()
     endfunction
 else
     function! s:sw()

-        return &sw
+        return &shiftwidth

     endfunction
 endif
 
     endfunction
 endif
 

-function! s:pair_sort(x, y)
-    if a:x[0] == a:y[0]
-        return a:x[1] == a:y[1] ? 0 : a:x[1] > a:y[1] ? 1 : -1
-    else
-        return a:x[0] > a:y[0] ? 1 : -1
-    endif
-endfunction
-

 " Find backwards the closest open parenthesis/bracket/brace.
 function! s:find_opening_paren(...)
     " optional arguments: line and column (defaults to 1) to search around
 " Find backwards the closest open parenthesis/bracket/brace.
 function! s:find_opening_paren(...)
     " optional arguments: line and column (defaults to 1) to search around


@@ -109,29 +103,26 @@ function! s:find_opening_paren(...)
         return ret
     endif
 
         return ret
     endif
 

-    let stopline = max([0, line('.') - s:maxoff])
-

     " Return if cursor is in a comment.
     exe 'if' s:skip_search '| return [0, 0] | endif'
 
     " Return if cursor is in a comment.
     exe 'if' s:skip_search '| return [0, 0] | endif'
 

-    let positions = []
-    for p in s:paren_pairs
-        call add(positions, searchpairpos(
-           \ '\V'.p[0], '', '\V'.p[1], 'bnW', s:skip_special_chars, stopline))
+    let nearest = [0, 0]
+    for [p, maxoff] in items(s:paren_pairs)
+        let stopline = max([0, line('.') - maxoff, nearest[0]])
+        let next = searchpairpos(
+           \ '\V'.p[0], '', '\V'.p[1], 'bnW', s:skip_special_chars, stopline)
+        if next[0] && (next[0] > nearest[0] || (next[0] == nearest[0] && next[1] > nearest[1]))
+            let nearest = next
+        endif

     endfor
     endfor

-
-    " Remove empty matches and return the type with the closest match
-    call filter(positions, 'v:val[0]')
-    call sort(positions, 's:pair_sort')
-
-    return get(positions, -1, [0, 0])
+    return nearest

 endfunction
 
 " Find the start of a multi-line statement
 function! s:find_start_of_multiline_statement(lnum)
     let lnum = a:lnum
     while lnum > 0
 endfunction
 
 " Find the start of a multi-line statement
 function! s:find_start_of_multiline_statement(lnum)
     let lnum = a:lnum
     while lnum > 0

-        if getline(lnum - 1) =~ '\\$'
+        if getline(lnum - 1) =~# '\\$'

             let lnum = prevnonblank(lnum - 1)
         else
             let [paren_lnum, _] = s:find_opening_paren(lnum)
             let lnum = prevnonblank(lnum - 1)
         else
             let [paren_lnum, _] = s:find_opening_paren(lnum)


@@ -186,7 +177,7 @@ function! s:match_expr_on_line(expr, lnum, start, ...)
     let r = 1
     for i in range(a:start, end)
         call cursor(a:lnum, i)
     let r = 1
     for i in range(a:start, end)
         call cursor(a:lnum, i)

-        if !(eval(a:expr) || text[i-1] =~ '\s')
+        if !(eval(a:expr) || text[i-1] =~# '\s')

             let r = 0
             break
         endif
             let r = 0
             break
         endif


@@ -206,10 +197,13 @@ function! s:indent_like_opening_paren(lnum)
 
     let nothing_after_opening_paren = s:match_expr_on_line(
                 \ s:skip_after_opening_paren, paren_lnum, paren_col+1)
 
     let nothing_after_opening_paren = s:match_expr_on_line(
                 \ s:skip_after_opening_paren, paren_lnum, paren_col+1)

-    let starts_with_closing_paren = getline(a:lnum) =~ '^\s*[])}]'
+    let starts_with_closing_paren = getline(a:lnum) =~# '^\s*[])}]'
+
+    let hang_closing = get(b:, 'python_pep8_indent_hang_closing',
+                \ get(g:, 'python_pep8_indent_hang_closing', 0))

 
     if nothing_after_opening_paren
 
     if nothing_after_opening_paren

-        if starts_with_closing_paren
+        if starts_with_closing_paren && !hang_closing

             let res = base
         else
             let res = base + s:sw()
             let res = base
         else
             let res = base + s:sw()


@@ -223,10 +217,13 @@ function! s:indent_like_opening_paren(lnum)
     " indent further to distinguish the continuation line
     " from the next logical line.
     if text =~# b:control_statement && res == base + s:sw()
     " indent further to distinguish the continuation line
     " from the next logical line.
     if text =~# b:control_statement && res == base + s:sw()

-        return base + s:sw() * 2
-    else
-        return res
+        " But only if not inside parens itself (Flake's E127).
+        let [paren_lnum, _] = s:find_opening_paren(paren_lnum)
+        if paren_lnum <= 0
+            return res + s:sw()
+        endif

     endif
     endif

+    return res

 endfunction
 
 " Match indent of first block of this type.
 endfunction
 
 " Match indent of first block of this type.


@@ -280,18 +277,18 @@ function! s:indent_like_previous_line(lnum)
 
     " Search for final colon that is not inside something to be ignored.
     while 1
 
     " Search for final colon that is not inside something to be ignored.
     while 1

-        let curpos = getpos(".")[2]
+        let curpos = getpos('.')[2]

         if curpos == 1 | break | endif
         if curpos == 1 | break | endif

-        if eval(s:skip_special_chars) || text[curpos-1] =~ '\s'
+        if eval(s:skip_special_chars) || text[curpos-1] =~# '\s'

             normal! h
             continue
             normal! h
             continue

-        elseif text[curpos-1] == ':'
+        elseif text[curpos-1] ==# ':'

             return base + s:sw()
         endif
         break
     endwhile
 
             return base + s:sw()
         endif
         break
     endwhile
 

-    if text =~ '\\$' && !ignore_last_char
+    if text =~# '\\$' && !ignore_last_char

         " If this line is the continuation of a control statement
         " indent further to distinguish the continuation line
         " from the next logical line.
         " If this line is the continuation of a control statement
         " indent further to distinguish the continuation line
         " from the next logical line.


@@ -305,6 +302,13 @@ function! s:indent_like_previous_line(lnum)
 
     let empty = getline(a:lnum) =~# '^\s*$'
 
 
     let empty = getline(a:lnum) =~# '^\s*$'
 

+    " Current and prev line are empty, next is not -> indent like next.
+    if empty && a:lnum > 1 &&
+          \ (getline(a:lnum - 1) =~# '^\s*$') &&
+          \ !(getline(a:lnum + 1) =~# '^\s*$')
+      return indent(a:lnum + 1)
+    endif
+

     " If the previous statement was a stop-execution statement or a pass
     if getline(start) =~# s:stop_statement
         " Remove one level of indentation if the user hasn't already dedented
     " If the previous statement was a stop-execution statement or a pass
     if getline(start) =~# s:stop_statement
         " Remove one level of indentation if the user hasn't already dedented


@@ -333,14 +337,14 @@ endfunction
 " Is the syntax at lnum (and optionally cnum) a python string?
 function! s:is_python_string(lnum, ...)
     let line = getline(a:lnum)
 " Is the syntax at lnum (and optionally cnum) a python string?
 function! s:is_python_string(lnum, ...)
     let line = getline(a:lnum)

-    let linelen = len(line)
-    if linelen < 1
-      let linelen = 1
+    if a:0
+      let cols = type(a:1) != type([]) ? [a:1] : a:1
+    else
+      let cols = range(1, max([1, len(line)]))

     endif
     endif

-    let cols = a:0 ? type(a:1) != type([]) ? [a:1] : a:1 : range(1, linelen)

     for cnum in cols
         if match(map(synstack(a:lnum, cnum),
     for cnum in cols
         if match(map(synstack(a:lnum, cnum),

-                    \ 'synIDattr(v:val,"name")'), 'python\S*String') == -1
+                    \ "synIDattr(v:val, 'name')"), 'python\S*String') == -1

             return 0
         end
     endfor
             return 0
         end
     endfor


@@ -357,7 +361,7 @@ function! GetPythonPEPIndent(lnum)
     let prevline = getline(a:lnum-1)
 
     " Multilinestrings: continous, docstring or starting.
     let prevline = getline(a:lnum-1)
 
     " Multilinestrings: continous, docstring or starting.

-    if s:is_python_string(a:lnum-1, len(prevline))
+    if s:is_python_string(a:lnum-1, max([1, len(prevline)]))

                 \ && (s:is_python_string(a:lnum, 1)
                 \     || match(line, '^\%("""\|''''''\)') != -1)
 
                 \ && (s:is_python_string(a:lnum, 1)
                 \     || match(line, '^\%("""\|''''''\)') != -1)
 


@@ -365,7 +369,7 @@ function! GetPythonPEPIndent(lnum)
         let match_quotes = match(line, '^\s*\zs\%("""\|''''''\)')
         if match_quotes != -1
             " closing multiline string
         let match_quotes = match(line, '^\s*\zs\%("""\|''''''\)')
         if match_quotes != -1
             " closing multiline string

-            let quotes = line[match_quotes:match_quotes+2]
+            let quotes = line[match_quotes:(match_quotes+2)]

             let pairpos = searchpairpos(quotes, '', quotes, 'b')
             if pairpos[0] != 0
                 return indent(pairpos[0])
             let pairpos = searchpairpos(quotes, '', quotes, 'b')
             if pairpos[0] != 0
                 return indent(pairpos[0])


@@ -375,8 +379,8 @@ function! GetPythonPEPIndent(lnum)
         endif
 
         if s:is_python_string(a:lnum-1)
         endif
 
         if s:is_python_string(a:lnum-1)

-            " Previous line is (completely) a string.
-            return indent(a:lnum-1)
+            " Previous line is (completely) a string: keep current indent.
+            return -1

         endif
 
         if match(prevline, '^\s*\%("""\|''''''\)') != -1
         endif
 
         if match(prevline, '^\s*\%("""\|''''''\)') != -1