From: Johann Klähn Date: Mon, 18 Mar 2013 21:38:15 +0000 (+0100) Subject: clean up implementation X-Git-Url: https://git.madduck.net/etc/vim.git/commitdiff_plain/eed8e99ce344d773997c4683aef9de3e2ed7ec62?ds=inline;hp=--cc clean up implementation --- eed8e99ce344d773997c4683aef9de3e2ed7ec62 diff --git a/indent/python.vim b/indent/python.vim index db12e24..7b6580a 100644 --- a/indent/python.vim +++ b/indent/python.vim @@ -18,212 +18,210 @@ setlocal indentexpr=GetPythonPEPIndent(v:lnum) setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except let s:maxoff = 50 +let s:block_rules = { + \ '^\s*\(elif\|else\)\>': ['if', 'elif'], + \ '^\s*except\>': ['try', 'except'], + \ '^\s*finally\>': ['try', 'except', 'else'] + \ } +let s:paren_pairs = ['()', '{}', '[]'] +let s:control_statement = '^\s*\(if\|while\|with\|for\|except\)\>' +let s:stop_statement = '^\s*\(break\|continue\|raise\|return\|pass\)\>' +if v:version >= 704 || (v:version == 703 && has('patch1037')) + let s:string_literal = '".\{-}\\\@1 parlnum || (par2lnum == parlnum && par2col > parcol) - let parlnum = par2lnum - let parcol = par2col - endif - if par3lnum > parlnum || (par3lnum == parlnum && par3col > parcol) - let parlnum = par3lnum - let parcol = par3col +" compatibility with vim patch 7.3.629: 'sw' can be set to -1 to follow 'ts' +if exists('*shiftwidth') + function! s:sw() + return shiftwidth() + endfunction +else + function! s:sw() + return &sw + 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 - " Put the cursor on the match - if parlnum > 0 - call cursor(parlnum, parcol) +" Find backwards the closest open parenthesis/bracket/brace. +function! s:find_opening_paren(...) + " optional arguments: line and column (defaults to 1) to search around + if a:0 > 0 + let view = winsaveview() + call cursor(a:1, a:0 > 1 ? a:2 : 1) + let ret = s:find_opening_paren() + call winrestview(view) + return ret endif - return parlnum + + let stopline = max([0, line('.') - s:maxoff]) + + " Skip strings and comments + let skip = 'synIDattr(synID(line("."), col("."), 0), "name") ' . + \ '=~? "string\\|comment"' + + " Return if cursor is in a comment or string + exe 'if' skip '| return [0, 0] | endif' + + let positions = [] + for p in s:paren_pairs + call add(positions, searchpairpos('\V'.p[0], '', '\V'.p[1], 'bnW', skip, stopline)) + 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, 0, [0, 0]) endfunction " Find the start of a multi-line statement -function! s:StatementStart(lnum) +function! s:find_start_of_multiline_statement(lnum) let lnum = a:lnum - while 1 + while lnum > 0 if getline(lnum - 1) =~ '\\$' - let lnum = lnum - 1 + let lnum = prevnonblank(lnum - 1) else - call cursor(lnum, 1) - let maybe_lnum = s:SearchParensPair() - if maybe_lnum < 1 + let [paren_lnum, _] = s:find_opening_paren(lnum) + if paren_lnum < 1 return lnum else - let lnum = maybe_lnum + let lnum = paren_lnum endif endif endwhile endfunction " Find the block starter that matches the current line -function! s:BlockStarter(lnum, block_start_re) +function! s:find_start_of_block(lnum, types) + let re = '\V\^\s\*\('.join(a:types, '\|').'\)\>' + let lnum = a:lnum - let maxindent = 10000 " whatever - while lnum > 1 - let lnum = prevnonblank(lnum - 1) - if indent(lnum) < maxindent - if getline(lnum) =~ a:block_start_re + let last_indent = indent(lnum) + 1 + while lnum > 0 && last_indent > 0 + if indent(lnum) < last_indent + if getline(lnum) =~# re return lnum - else - let maxindent = indent(lnum) - " It's not worth going further if we reached the top level - if maxindent == 0 - return -1 - endif endif + let last_indent = indent(lnum) endif + let lnum = prevnonblank(lnum - 1) endwhile - return -1 + return 0 endfunction -function! GetPythonPEPIndent(lnum) - " First line has indent 0 - if a:lnum == 1 - return 0 - endif - - " If we can find an open parenthesis/bracket/brace, line up with it. - call cursor(a:lnum, 1) - let parlnum = s:SearchParensPair() - if parlnum > 0 - let parcol = col('.') - let closing_paren = match(getline(a:lnum), '^\s*[])}]') != -1 - if match(getline(parlnum), '[([{]\s*$', parcol - 1) != -1 - if closing_paren - return indent(parlnum) - else - return indent(parlnum) + &shiftwidth - endif - else - return parcol - endif +" Line up with open parenthesis/bracket/brace. +function! s:indent_like_opening_paren(lnum) + let [paren_lnum, paren_col] = s:find_opening_paren(a:lnum) + if paren_lnum <= 0 + return -2 endif + let text = getline(paren_lnum) + let base = indent(paren_lnum) - " Examine this line - let thisline = getline(a:lnum) - let thisindent = indent(a:lnum) + let nothing_after_opening_paren = text =~ '\%'.(paren_col + 1).'c\s*$' + let starts_with_closing_paren = getline(a:lnum) =~ '^\s*[])}]' - " If the line starts with 'elif', line up with 'if' or 'elif' - if thisline =~ '^\s*elif\>' - let bslnum = s:BlockStarter(a:lnum, '^\s*\(if\|elif\)\>') - if bslnum > 0 - return indent(bslnum) + if nothing_after_opening_paren + if starts_with_closing_paren + return base else - return -1 + return base + s:sw() endif + else + " Indent to match position of opening paren. + return paren_col endif +endfunction - " If the line starts with 'except' line up with 'try' or 'except'. - if thisline =~ '^\s*except\>' - let bslnum = s:BlockStarter(a:lnum, '^\s*\(try\|except\)\>') - if bslnum > 0 - return indent(bslnum) - else - return -1 - endif - endif +" Match indent of first block of this type. +function! s:indent_like_block(lnum) + let text = getline(a:lnum) - " If the line starts with 'finally', line up with 'try', 'else', or - " 'except'. - if thisline =~ '^\s*finally\>' - let bslnum = s:BlockStarter(a:lnum, '^\s*\(try\|except\|else\)\>') - if bslnum > 0 - return indent(bslnum) - else - return -1 + for [line_re, blocks] in items(s:block_rules) + if text !~# line_re + continue endif - endif - " If the line starts with 'else', line it up with 'try', 'except', 'for', - " 'if', or 'elif'. - if thisline =~ '^\s*else\>' - :echom thisline - let bslnum = s:BlockStarter(a:lnum, '^\s*\(try\|except\|if\|elif\|for\)\>') - if bslnum > 0 - return indent(bslnum) + let lnum = s:find_start_of_block(a:lnum - 1, blocks) + if lnum > 0 + return indent(lnum) else return -1 endif - endif + endfor - " Examine previous line - let plnum = a:lnum - 1 - let pline = getline(plnum) - let sslnum = s:StatementStart(plnum) + return -2 +endfunction - " If the previous line is blank, keep the same indentation - if pline =~ '^\s*$' - return -1 - endif +function! s:indent_like_previous_line(lnum) + let lnum = prevnonblank(a:lnum - 1) + let text = getline(lnum) + let start = s:find_start_of_multiline_statement(lnum) + let base = indent(start) - " If this line is explicitly joined, find the first indentation that is a - " multiple of four and will distinguish itself from next logical line. - if pline =~ '\\$' - let maybe_indent = indent(sslnum) + &sw - let control_structure = '^\s*\(if\|while\|for\s.*\sin\|except\)\s*' - if match(getline(sslnum), control_structure) != -1 - " add extra indent to avoid E125 - return maybe_indent + &sw - else - " control structure not found - return maybe_indent - endif - endif + " Remove string literals. + let text = substitute(text, s:string_literal, '', 'g') " If the previous line ended with a colon and is not a comment, indent " relative to statement start. - let pline = substitute(pline, '\\\\', '', 'g') - if v:version > 703 || (v:version == 703 && has('patch1037')) - let pline = substitute(pline, '".\{-}\\\@1' - " See if the user has already dedented - if indent(a:lnum) > indent(sslnum) - &sw - " If not, recommend one dedent - return indent(sslnum) - &sw + " 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 indent(a:lnum) > base - s:sw() + return base - s:sw() endif " Otherwise, trust the user return -1 endif - " If this line is dedented and the number of indent spaces is valid - " (multiple of the indentation size), trust the user - let dedent_size = thisindent - indent(plnum) - if dedent_size < 0 && thisindent % &sw == 0 - return -1 + " In all other cases, line up with the start of the previous statement. + return base +endfunction + +function! GetPythonPEPIndent(lnum) + + " First line has indent 0 + if a:lnum == 1 + return 0 endif - " In all other cases, line up with the start of the previous statement. - return indent(sslnum) + " 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 + return indent + endif + + " Blocks: Match indent of first block of this type. + let indent = s:indent_like_block(a:lnum) + if indent >= -1 + return indent + endif + + return s:indent_like_previous_line(a:lnum) endfunction