Fix regression with colon-at-eol detection (#44)

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

diff --git a/indent/python.vim b/indent/python.vim
index e8f484ba4ddc61575312bc15b77bf68cd1179e5a..c3c6c03454ad5d0d3a63f2ae8030c0ec910e9b99 100644 (file)
--- a/indent/python.vim
+++ b/indent/python.vim
@@ -40,17 +40,34 @@ let s:block_rules = {
             \ '^\s*finally\>': ['try', 'except', 'else']
             \ }
 let s:paren_pairs = ['()', '{}', '[]']
-let s:control_statement = '^\s*\(if\|while\|with\|for\|except\)\>'
+let s:control_statement = '^\s*\(class\|def\|if\|while\|with\|for\|except\)\>'
 let s:stop_statement = '^\s*\(break\|continue\|raise\|return\|pass\)\>'
 
-" Skip strings and comments
+" Skip strings and comments. Return 1 for chars to skip.
+" jedi* refers to syntax definitions from jedi-vim for call signatures, which
+" are inserted temporarily into the buffer.
 let s:skip_special_chars = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
-            \ '=~? "string\\|comment"'
+            \ '=~? "\\vstring|comment|jedi\\S"'
+
+let s:skip_after_opening_paren = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
+            \ '=~? "\\vcomment|jedi\\S"'
+
+" Also ignore anything concealed.
+" Wrapper around synconcealed for older Vim (7.3.429, used on Travis CI).
+function! s:is_concealed(line, col)
+    let concealed = synconcealed(a:line, a:col)
+    return len(concealed) && concealed[0]
+endfunction
+if has('conceal')
+    let s:skip_special_chars .= '|| s:is_concealed(line("."), col("."))'
+endif
+
 
 let s:skip_search = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
             \ '=~? "comment"'
 
-" compatibility with vim patch 7.3.629: 'sw' can be set to -1 to follow 'ts'
+" Use 'shiftwidth()' instead of '&sw'.
+" (Since Vim patch 7.3.629, 'shiftwidth' can be set to 0 to follow 'tabstop').
 if exists('*shiftwidth')
     function! s:sw()
         return shiftwidth()
@@ -82,7 +99,7 @@ function! s:find_opening_paren(...)
 
     let stopline = max([0, line('.') - s:maxoff])
 
-    " Return if cursor is in a comment or string
+    " Return if cursor is in a comment.
     exe 'if' s:skip_search '| return [0, 0] | endif'
 
     let positions = []
@@ -133,6 +150,27 @@ function! s:find_start_of_block(lnum, types)
     return 0
 endfunction
 
+" Is "expr" true for every position in "lnum", beginning at "start"?
+" (optionally up to a:1 / 4th argument)
+function! s:match_expr_on_line(expr, lnum, start, ...)
+    let text = getline(a:lnum)
+    let end = a:0 ? a:1 : len(text)
+    if a:start > end
+        return 1
+    endif
+    let save_pos = getpos('.')
+    let r = 1
+    for i in range(a:start, end)
+        call cursor(a:lnum, i)
+        if !(eval(a:expr) || text[i-1] =~ '\s')
+            let r = 0
+            break
+        endif
+    endfor
+    call setpos('.', save_pos)
+    return r
+endfunction
+
 " Line up with open parenthesis/bracket/brace.
 function! s:indent_like_opening_paren(lnum)
     let [paren_lnum, paren_col] = s:find_opening_paren(a:lnum)
@@ -142,7 +180,8 @@ function! s:indent_like_opening_paren(lnum)
     let text = getline(paren_lnum)
     let base = indent(paren_lnum)
 
-    let nothing_after_opening_paren = text =~ '\%'.(paren_col + 1).'c\s*$'
+    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*[])}]'
 
     if nothing_after_opening_paren
@@ -203,13 +242,17 @@ function! s:indent_like_previous_line(lnum)
     call cursor(lnum, len(text))
     let ignore_last_char = eval(s:skip_special_chars)
 
-    " Search for final colon that is not inside a string or comment.
-    while search(':\s*\%(#.*\)\?$', 'bcW', lnum)
-      if eval(s:skip_special_chars)
-        normal! h
-      else
-        return base + s:sw()
-      endif
+    " Search for final colon that is not inside something to be ignored.
+    while 1
+        let curpos = getpos(".")[2]
+        if curpos == 1 | break | endif
+        if eval(s:skip_special_chars) || text[curpos-1] =~ '\s'
+            normal! h
+            continue
+        elseif text[curpos-1] == ':'
+            return base + s:sw()
+        endif
+        break
     endwhile
 
     if text =~ '\\$' && !ignore_last_char
@@ -245,6 +288,23 @@ function! s:indent_like_previous_line(lnum)
     return base
 endfunction
 
+" 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
+    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),
+                    \ 'synIDattr(v:val,"name")'), 'python\S*String') == -1
+            return 0
+        end
+    endfor
+    return 1
+endfunction
+
 function! GetPythonPEPIndent(lnum)
 
     " First line has indent 0
@@ -252,6 +312,24 @@ function! GetPythonPEPIndent(lnum)
         return 0
     endif
 
+    " Multilinestrings: continous, docstring or starting.
+    if s:is_python_string(a:lnum)
+        if s:is_python_string(a:lnum-1)
+            " Previous line is (completely) a string.
+            return s:indent_like_previous_line(a:lnum)
+        endif
+
+        if match(getline(a:lnum-1), '^\s*\%("""\|''''''\)') != -1
+            " docstring.
+            return s:indent_like_previous_line(a:lnum)
+        endif
+
+        if s:is_python_string(a:lnum-1, len(getline(a:lnum-1)))
+            " String started in previous line.
+            return 0
+        endif
+    endif
+
     " Parens: If we can find an open parenthesis/bracket/brace, line up with it.
     let indent = s:indent_like_opening_paren(a:lnum)
     if indent >= -1