| " 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 |