home *** CD-ROM | disk | FTP | other *** search
- " Vim indent file
- " Language: SQL
- " Maintainer: David Fishburn <fishburn at ianywhere dot com>
- " Last Change: Mon Apr 02 2007 9:13:47 AM
- " Version: 1.5
- " Download: http://vim.sourceforge.net/script.php?script_id=495
-
- " Notes:
- " Indenting keywords are based on Oracle and Sybase Adaptive Server
- " Anywhere (ASA). Test indenting was done with ASA stored procedures and
- " fuctions and Oracle packages which contain stored procedures and
- " functions.
- " This has not been tested against Microsoft SQL Server or
- " Sybase Adaptive Server Enterprise (ASE) which use the Transact-SQL
- " syntax. That syntax does not have end tags for IF's, which makes
- " indenting more difficult.
- "
- " Known Issues:
- " The Oracle MERGE statement does not have an end tag associated with
- " it, this can leave the indent hanging to the right one too many.
-
- " Only load this indent file when no other was loaded.
- if exists("b:did_indent")
- finish
- endif
- let b:did_indent = 1
- let b:current_indent = "sqlanywhere"
-
- setlocal indentkeys-=0{
- setlocal indentkeys-=0}
- setlocal indentkeys-=:
- setlocal indentkeys-=0#
- setlocal indentkeys-=e
-
- " This indicates formatting should take place when one of these
- " expressions is used. These expressions would normally be something
- " you would type at the BEGINNING of a line
- " SQL is generally case insensitive, so this files assumes that
- " These keywords are something that would trigger an indent LEFT, not
- " an indent right, since the SQLBlockStart is used for those keywords
- setlocal indentkeys+==~end,=~else,=~elseif,=~elsif,0=~when,0=)
-
- " GetSQLIndent is executed whenever one of the expressions
- " in the indentkeys is typed
- setlocal indentexpr=GetSQLIndent()
-
- " Only define the functions once.
- if exists("*GetSQLIndent")
- finish
- endif
- let s:keepcpo= &cpo
- set cpo&vim
-
- " List of all the statements that start a new block.
- " These are typically words that start a line.
- " IS is excluded, since it is difficult to determine when the
- " ending block is (especially for procedures/functions).
- let s:SQLBlockStart = '^\s*\%('.
- \ 'if\|else\|elseif\|elsif\|'.
- \ 'while\|loop\|do\|'.
- \ 'begin\|'.
- \ 'case\|when\|merge\|exception'.
- \ '\)\>'
- let s:SQLBlockEnd = '^\s*\(end\)\>'
-
- " The indent level is also based on unmatched paranethesis
- " If a line has an extra "(" increase the indent
- " If a line has an extra ")" decrease the indent
- function s:CountUnbalancedParan( line, paran_to_check )
- let l = a:line
- let lp = substitute(l, '[^(]', '', 'g')
- let l = a:line
- let rp = substitute(l, '[^)]', '', 'g')
-
- if a:paran_to_check =~ ')'
- " echom 'CountUnbalancedParan ) returning: ' .
- " \ (strlen(rp) - strlen(lp))
- return (strlen(rp) - strlen(lp))
- elseif a:paran_to_check =~ '('
- " echom 'CountUnbalancedParan ( returning: ' .
- " \ (strlen(lp) - strlen(rp))
- return (strlen(lp) - strlen(rp))
- else
- " echom 'CountUnbalancedParan unknown paran to check: ' .
- " \ a:paran_to_check
- return 0
- endif
- endfunction
-
- " Unindent commands based on previous indent level
- function s:CheckToIgnoreRightParan( prev_lnum, num_levels )
- let lnum = a:prev_lnum
- let line = getline(lnum)
- let ends = 0
- let num_right_paran = a:num_levels
- let ignore_paran = 0
- let vircol = 1
-
- while num_right_paran > 0
- silent! exec 'norm! '.lnum."G\<bar>".vircol."\<bar>"
- let right_paran = search( ')', 'W' )
- if right_paran != lnum
- " This should not happen since there should be at least
- " num_right_paran matches for this line
- break
- endif
- let vircol = virtcol(".")
-
- " if getline(".") =~ '^)'
- let matching_paran = searchpair('(', '', ')', 'bW',
- \ 's:IsColComment(line("."), col("."))')
-
- if matching_paran < 1
- " No match found
- " echom 'CTIRP - no match found, ignoring'
- break
- endif
-
- if matching_paran == lnum
- " This was not an unmatched parantenses, start the search again
- " again after this column
- " echom 'CTIRP - same line match, ignoring'
- continue
- endif
-
- " echom 'CTIRP - match: ' . line(".") . ' ' . getline(".")
-
- if getline(matching_paran) =~? '\(if\|while\)\>'
- " echom 'CTIRP - if/while ignored: ' . line(".") . ' ' . getline(".")
- let ignore_paran = ignore_paran + 1
- endif
-
- " One match found, decrease and check for further matches
- let num_right_paran = num_right_paran - 1
-
- endwhile
-
- " Fallback - just move back one
- " return a:prev_indent - &sw
- return ignore_paran
- endfunction
-
- " Based on the keyword provided, loop through previous non empty
- " non comment lines to find the statement that initated the keyword.
- " Return its indent level
- " CASE ..
- " WHEN ...
- " Should return indent level of CASE
- " EXCEPTION ..
- " WHEN ...
- " something;
- " WHEN ...
- " Should return indent level of exception.
- function s:GetStmtStarterIndent( keyword, curr_lnum )
- let lnum = a:curr_lnum
-
- " Default - reduce indent by 1
- let ind = indent(a:curr_lnum) - &sw
-
- if a:keyword =~? 'end'
- exec 'normal! ^'
- let stmts = '^\s*\%('.
- \ '\<begin\>\|' .
- \ '\%(\%(\<end\s\+\)\@<!\<loop\>\)\|' .
- \ '\%(\%(\<end\s\+\)\@<!\<case\>\)\|' .
- \ '\%(\%(\<end\s\+\)\@<!\<for\>\)\|' .
- \ '\%(\%(\<end\s\+\)\@<!\<if\>\)'.
- \ '\)'
- let matching_lnum = searchpair(stmts, '', '\<end\>\zs', 'bW',
- \ 's:IsColComment(line("."), col(".")) == 1')
- exec 'normal! $'
- if matching_lnum > 0 && matching_lnum < a:curr_lnum
- let ind = indent(matching_lnum)
- endif
- elseif a:keyword =~? 'when'
- exec 'normal! ^'
- let matching_lnum = searchpair(
- \ '\%(\<end\s\+\)\@<!\<case\>\|\<exception\>\|\<merge\>',
- \ '',
- \ '\%(\%(\<when\s\+others\>\)\|\%(\<end\s\+case\>\)\)',
- \ 'bW',
- \ 's:IsColComment(line("."), col(".")) == 1')
- exec 'normal! $'
- if matching_lnum > 0 && matching_lnum < a:curr_lnum
- let ind = indent(matching_lnum)
- else
- let ind = indent(a:curr_lnum)
- endif
- endif
-
- return ind
- endfunction
-
-
- " Check if the line is a comment
- function s:IsLineComment(lnum)
- let rc = synIDattr(
- \ synID(a:lnum,
- \ match(getline(a:lnum), '\S')+1, 0)
- \ , "name")
- \ =~? "comment"
-
- return rc
- endfunction
-
-
- " Check if the column is a comment
- function s:IsColComment(lnum, cnum)
- let rc = synIDattr(synID(a:lnum, a:cnum, 0), "name")
- \ =~? "comment"
-
- return rc
- endfunction
-
-
- " Instead of returning a column position, return
- " an appropriate value as a factor of shiftwidth.
- function s:ModuloIndent(ind)
- let ind = a:ind
-
- if ind > 0
- let modulo = ind % &shiftwidth
-
- if modulo > 0
- let ind = ind - modulo
- endif
- endif
-
- return ind
- endfunction
-
-
- " Find correct indent of a new line based upon the previous line
- function GetSQLIndent()
- let lnum = v:lnum
- let ind = indent(lnum)
-
- " If the current line is a comment, leave the indent as is
- " Comment out this additional check since it affects the
- " indenting of =, and will not reindent comments as it should
- " if s:IsLineComment(lnum) == 1
- " return ind
- " endif
-
- " while 1
- " Get previous non-blank line
- let prevlnum = prevnonblank(lnum - 1)
- if prevlnum <= 0
- return ind
- endif
-
- if s:IsLineComment(prevlnum) == 1
- if getline(v:lnum) =~ '^\s*\*'
- let ind = s:ModuloIndent(indent(prevlnum))
- return ind + 1
- endif
- " If the previous line is a comment, then return -1
- " to tell Vim to use the formatoptions setting to determine
- " the indent to use
- " But only if the next line is blank. This would be true if
- " the user is typing, but it would not be true if the user
- " is reindenting the file
- if getline(v:lnum) =~ '^\s*$'
- return -1
- endif
- endif
-
- " let prevline = getline(prevlnum)
- " if prevline !~ '^\s*$'
- " " echom 'previous non blank - break: ' . prevline
- " break
- " endif
- " endwhile
-
- " echom 'PREVIOUS INDENT: ' . indent(prevlnum) . ' LINE: ' . getline(prevlnum)
-
- " This is the line you just hit return on, it is not the current line
- " which is new and empty
- " Based on this line, we can determine how much to indent the new
- " line
-
- " Get default indent (from prev. line)
- let ind = indent(prevlnum)
- let prevline = getline(prevlnum)
-
- " Now check what's on the previous line to determine if the indent
- " should be changed, for example IF, BEGIN, should increase the indent
- " where END IF, END, should decrease the indent.
- if prevline =~? s:SQLBlockStart
- " Move indent in
- let ind = ind + &sw
- " echom 'prevl - SQLBlockStart - indent ' . ind . ' line: ' . prevline
- elseif prevline =~ '[()]'
- if prevline =~ '('
- let num_unmatched_left = s:CountUnbalancedParan( prevline, '(' )
- else
- let num_unmatched_left = 0
- endif
- if prevline =~ ')'
- let num_unmatched_right = s:CountUnbalancedParan( prevline, ')' )
- else
- let num_unmatched_right = 0
- " let num_unmatched_right = s:CountUnbalancedParan( prevline, ')' )
- endif
- if num_unmatched_left > 0
- " There is a open left paranethesis
- " increase indent
- let ind = ind + ( &sw * num_unmatched_left )
- elseif num_unmatched_right > 0
- " if it is an unbalanced paranethesis only unindent if
- " it was part of a command (ie create table(..) )
- " instead of part of an if (ie if (....) then) which should
- " maintain the indent level
- let ignore = s:CheckToIgnoreRightParan( prevlnum, num_unmatched_right )
- " echom 'prevl - ) unbalanced - CTIRP - ignore: ' . ignore
-
- if prevline =~ '^\s*)'
- let ignore = ignore + 1
- " echom 'prevl - begins ) unbalanced ignore: ' . ignore
- endif
-
- if (num_unmatched_right - ignore) > 0
- let ind = ind - ( &sw * (num_unmatched_right - ignore) )
- endif
-
- endif
- endif
-
-
- " echom 'CURRENT INDENT: ' . ind . ' LINE: ' . getline(v:lnum)
-
- " This is a new blank line since we just typed a carriage return
- " Check current line; search for simplistic matching start-of-block
- let line = getline(v:lnum)
-
- if line =~? '^\s*els'
- " Any line when you type else will automatically back up one
- " ident level (ie else, elseif, elsif)
- let ind = ind - &sw
- " echom 'curr - else - indent ' . ind
- elseif line =~? '^\s*end\>'
- let ind = s:GetStmtStarterIndent('end', v:lnum)
- " General case for end
- " let ind = ind - &sw
- " echom 'curr - end - indent ' . ind
- elseif line =~? '^\s*when\>'
- let ind = s:GetStmtStarterIndent('when', v:lnum)
- " If the WHEN clause is used with a MERGE or EXCEPTION
- " clause, do not change the indent level, since these
- " statements do not have a corresponding END statement.
- " if stmt_starter =~? 'case'
- " let ind = ind - &sw
- " endif
- " elseif line =~ '^\s*)\s*;\?\s*$'
- " elseif line =~ '^\s*)'
- elseif line =~ '^\s*)'
- let num_unmatched_right = s:CountUnbalancedParan( line, ')' )
- let ignore = s:CheckToIgnoreRightParan( v:lnum, num_unmatched_right )
- " If the line ends in a ), then reduce the indent
- " This catches items like:
- " CREATE TABLE T1(
- " c1 int,
- " c2 int
- " );
- " But we do not want to unindent a line like:
- " IF ( c1 = 1
- " AND c2 = 3 ) THEN
- " let num_unmatched_right = s:CountUnbalancedParan( line, ')' )
- " if num_unmatched_right > 0
- " elseif strpart( line, strlen(line)-1, 1 ) =~ ')'
- " let ind = ind - &sw
- if line =~ '^\s*)'
- " let ignore = ignore + 1
- " echom 'curr - begins ) unbalanced ignore: ' . ignore
- endif
-
- if (num_unmatched_right - ignore) > 0
- let ind = ind - ( &sw * (num_unmatched_right - ignore) )
- endif
- " endif
- endif
-
- " echom 'final - indent ' . ind
- return s:ModuloIndent(ind)
- endfunction
-
- let &cpo = s:keepcpo
- unlet s:keepcpo
-
- " vim:sw=4:
-