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Diffstat (limited to 'runtime/indent/vb.vim')
| -rw-r--r-- | runtime/indent/vb.vim | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/runtime/indent/vb.vim b/runtime/indent/vb.vim new file mode 100644 index 0000000..bc7142f --- /dev/null +++ b/runtime/indent/vb.vim @@ -0,0 +1,155 @@ +" Vim indent file +" Language: VisualBasic (ft=vb) / Basic (ft=basic) / SaxBasic (ft=vb) +" Author: Johannes Zellner <johannes@zellner.org> +" Maintainer: Michael Soyka (mssr953@gmail.com) +" Last Change: Fri, 18 Jun 2004 07:22:42 CEST +" Small update 2010 Jul 28 by Maxim Kim +" 2022/12/15: add support for multiline statements. +" 2022/12/21: move VbGetIndent from global to script-local scope +" 2022/12/26: recognize "Type" keyword + +if exists("b:did_indent") + finish +endif +let b:did_indent = 1 + +setlocal autoindent +setlocal indentexpr=s:VbGetIndent(v:lnum) +setlocal indentkeys& +setlocal indentkeys+==~else,=~elseif,=~end,=~wend,=~case,=~next,=~select,=~loop + +let b:undo_indent = "set ai< indentexpr< indentkeys<" + +" Only define the function once. +if exists("*s:VbGetIndent") + finish +endif + +function s:VbGetIndent(lnum) + let this_lnum = a:lnum + let this_line = getline(this_lnum) + + " labels and preprocessor get zero indent immediately + let LABELS_OR_PREPROC = '^\s*\(\<\k\+\>:\s*$\|#.*\)' + if this_line =~? LABELS_OR_PREPROC + return 0 + endif + + " Get the current value of "shiftwidth" + let bShiftwidth = shiftwidth() + + " Find a non-blank line above the current line. + " Skip over labels and preprocessor directives. + let lnum = this_lnum + while lnum > 0 + let lnum = prevnonblank(lnum - 1) + let previous_line = getline(lnum) + if previous_line !~? LABELS_OR_PREPROC + break + endif + endwhile + + " Hit the start of the file, use zero indent. + if lnum == 0 + return 0 + endif + + " Variable "previous_line" now contains the text in buffer line "lnum". + + " Multi-line statements have the underscore character at end-of-line: + " + " object.method(arguments, _ + " arguments, _ + " arguments) + " + " and require extra logic to determine the correct indentation. + " + " Case 1: Line "lnum" is the first line of a multiline statement. + " Line "lnum" will have a trailing underscore character + " but the preceding non-blank line does not. + " Line "this_lnum" will be indented relative to "lnum". + " + " Case 2: Line "lnum" is the last line of a multiline statement. + " Line "lnum" will not have a trailing underscore character + " but the preceding non-blank line will. + " Line "this_lnum" will have the same indentation as the starting + " line of the multiline statement. + " + " Case 3: Line "lnum" is neither the first nor last line. + " Lines "lnum" and "lnum-1" will have a trailing underscore + " character. + " Line "this_lnum" will have the same indentation as the preceding + " line. + " + " No matter which case it is, the starting line of the statement must be + " found. It will be assumed that multiline statements cannot have + " intermingled comments, statement labels, preprocessor directives or + " blank lines. + " + let lnum_is_continued = (previous_line =~ '_$') + if lnum > 1 + let before_lnum = prevnonblank(lnum-1) + let before_previous_line = getline(before_lnum) + else + let before_lnum = 0 + let before_previous_line = "" + endif + + if before_previous_line !~ '_$' + " Variable "previous_line" contains the start of a statement. + " + let ind = indent(lnum) + if lnum_is_continued + let ind += bShiftwidth + endif + elseif ! lnum_is_continued + " Line "lnum" contains the last line of a multiline statement. + " Need to find where this multiline statement begins + " + while before_lnum > 0 + let before_lnum -= 1 + if getline(before_lnum) !~ '_$' + let before_lnum += 1 + break + endif + endwhile + if before_lnum == 0 + let before_lnum = 1 + endif + let previous_line = getline(before_lnum) + let ind = indent(before_lnum) + else + " Line "lnum" is not the first or last line of a multiline statement. + " + let ind = indent(lnum) + endif + + " Add + if previous_line =~? '^\s*\<\(begin\|\%(\%(private\|public\|friend\)\s\+\)\=\%(function\|sub\|property\|enum\|type\)\|select\|case\|default\|if\|else\|elseif\|do\|for\|while\|with\)\>' + let ind = ind + bShiftwidth + endif + + " Subtract + if this_line =~? '^\s*\<end\>\s\+\<select\>' + if previous_line !~? '^\s*\<select\>' + let ind = ind - 2 * bShiftwidth + else + " this case is for an empty 'select' -- 'end select' + " (w/o any case statements) like: + " + " select case readwrite + " end select + let ind = ind - bShiftwidth + endif + elseif this_line =~? '^\s*\<\(end\|else\|elseif\|until\|loop\|next\|wend\)\>' + let ind = ind - bShiftwidth + elseif this_line =~? '^\s*\<\(case\|default\)\>' + if previous_line !~? '^\s*\<select\>' + let ind = ind - bShiftwidth + endif + endif + + return ind +endfunction + +" vim:sw=4 |