Mercurial > vim
view runtime/indent/occam.vim @ 33947:f4d88db48a63 v9.0.2168
patch 9.0.2168: Moving tabpages on :drop may cause an endless loop
Commit: https://github.com/vim/vim/commit/df12e39b8b9dd39056e22b452276622cb7b617fd
Author: Christian Brabandt <cb@256bit.org>
Date: Sat Dec 16 13:55:32 2023 +0100
patch 9.0.2168: Moving tabpages on :drop may cause an endless loop
Problem: Moving tabpages on :drop may cause an endless loop
Solution: Disallow moving tabpages on :drop when cleaning up the arglist
first
Moving tabpages during drop command may cause an endless loop
When executing a :tab drop command, Vim will close all windows not in
the argument list. This triggers various autocommands. If a user has
created an 'au Tabenter * :tabmove -' autocommand, this can cause Vim to
end up in an endless loop, when trying to iterate over all tabs (which
would trigger the tabmove autocommand, which will change the tpnext
pointer, etc).
So instead of blocking all autocommands before we actually try to edit
the given file, lets simply disallow to move tabpages around. Otherwise,
we may change the expected number of events triggered during a :drop
command, which users may rely on (there is actually a test, that expects
various TabLeave/TabEnter autocommands) and would therefore be a
backwards incompatible change.
Don't make this an error, as this could trigger several times during the
drop command, but silently ignore the :tabmove command in this case (and
it should in fact finally trigger successfully when loading the given
file in a new tab). So let's just be quiet here instead.
fixes: #13676
closes: #13686
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sat, 16 Dec 2023 14:00:05 +0100 |
parents | 6dd88e45d47d |
children |
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" Vim indent file " Language: occam " Maintainer: Mario Schweigler <ms44@kent.ac.uk> (Invalid email address) " Doug Kearns <dougkearns@gmail.com> " Last Change: 2022 Apr 06 " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 "{{{ Settings " Set the occam indent function setlocal indentexpr=GetOccamIndent() " Indent after new line and after initial colon setlocal indentkeys=o,O,0=: "}}} let b:undo_indent = "setl inde< indk<" " Only define the function once if exists("*GetOccamIndent") finish endif let s:keepcpo= &cpo set cpo&vim "{{{ Indent definitions " Define carriage return indent let s:FirstLevelIndent = '^\C\s*\(IF\|ALT\|PRI\s\+ALT\|PAR\|SEQ\|PRI\s\+PAR\|WHILE\|VALOF\|CLAIM\|FORKING\)\>\|\(--.*\)\@<!\(\<PROC\>\|??\|\<CASE\>\s*\(--.*\)\=\_$\)' let s:FirstLevelNonColonEndIndent = '^\C\s*PROTOCOL\>\|\(--.*\)\@<!\<\(\(CHAN\|DATA\)\s\+TYPE\|FUNCTION\)\>' let s:SecondLevelIndent = '^\C\s*\(IF\|ALT\|PRI\s\+ALT\)\>\|\(--.*\)\@<!?\s*\<CASE\>\s*\(--.*\)\=\_$' let s:SecondLevelNonColonEndIndent = '\(--.*\)\@<!\<\(CHAN\|DATA\)\s\+TYPE\>' " Define colon indent let s:ColonIndent = '\(--.*\)\@<!\<PROC\>' let s:ColonNonColonEndIndent = '^\C\s*PROTOCOL\>\|\(--.*\)\@<!\<\(\(CHAN\|DATA\)\s\+TYPE\|FUNCTION\)\>' let s:ColonEnd = '\(--.*\)\@<!:\s*\(--.*\)\=$' let s:ColonStart = '^\s*:\s*\(--.*\)\=$' " Define comment let s:CommentLine = '^\s*--' "}}} "{{{ function GetOccamIndent() " Auxiliary function to get the correct indent for a line of occam code function GetOccamIndent() " Ensure magic is on let save_magic = &magic setlocal magic " Get reference line number let linenum = prevnonblank(v:lnum - 1) while linenum > 0 && getline(linenum) =~ s:CommentLine let linenum = prevnonblank(linenum - 1) endwhile " Get current indent let curindent = indent(linenum) " Get current line let line = getline(linenum) " Get previous line number let prevlinenum = prevnonblank(linenum - 1) while prevlinenum > 0 && getline(prevlinenum) =~ s:CommentLine let prevlinenum = prevnonblank(prevlinenum - 1) endwhile " Get previous line let prevline = getline(prevlinenum) " Colon indent if getline(v:lnum) =~ s:ColonStart let found = 0 while found < 1 if line =~ s:ColonStart let found = found - 1 elseif line =~ s:ColonIndent || (line =~ s:ColonNonColonEndIndent && line !~ s:ColonEnd) let found = found + 1 endif if found < 1 let linenum = prevnonblank(linenum - 1) if linenum > 0 let line = getline(linenum) else let found = 1 endif endif endwhile if linenum > 0 let curindent = indent(linenum) else let colonline = getline(v:lnum) let tabstr = '' while strlen(tabstr) < &tabstop let tabstr = ' ' . tabstr endwhile let colonline = substitute(colonline, '\t', tabstr, 'g') let curindent = match(colonline, ':') endif " Restore magic if !save_magic|setlocal nomagic|endif return curindent endif if getline(v:lnum) =~ '^\s*:' let colonline = getline(v:lnum) let tabstr = '' while strlen(tabstr) < &tabstop let tabstr = ' ' . tabstr endwhile let colonline = substitute(colonline, '\t', tabstr, 'g') let curindent = match(colonline, ':') " Restore magic if !save_magic|setlocal nomagic|endif return curindent endif " Carriage return indenat if line =~ s:FirstLevelIndent || (line =~ s:FirstLevelNonColonEndIndent && line !~ s:ColonEnd) \ || (line !~ s:ColonStart && (prevline =~ s:SecondLevelIndent \ || (prevline =~ s:SecondLevelNonColonEndIndent && prevline !~ s:ColonEnd))) let curindent = curindent + shiftwidth() " Restore magic if !save_magic|setlocal nomagic|endif return curindent endif " Commented line if getline(prevnonblank(v:lnum - 1)) =~ s:CommentLine " Restore magic if !save_magic|setlocal nomagic|endif return indent(prevnonblank(v:lnum - 1)) endif " Look for previous second level IF / ALT / PRI ALT let found = 0 while !found if indent(prevlinenum) == curindent - shiftwidth() let found = 1 endif if !found let prevlinenum = prevnonblank(prevlinenum - 1) while prevlinenum > 0 && getline(prevlinenum) =~ s:CommentLine let prevlinenum = prevnonblank(prevlinenum - 1) endwhile if prevlinenum == 0 let found = 1 endif endif endwhile if prevlinenum > 0 if getline(prevlinenum) =~ s:SecondLevelIndent let curindent = curindent + shiftwidth() endif endif " Restore magic if !save_magic|setlocal nomagic|endif return curindent endfunction "}}} let &cpo = s:keepcpo unlet s:keepcpo