patch 9.1.0170: Re-allow curwin == prevwin, but document it instead Commit: https://github.com/vim/vim/commit/d64801e913314d2e19dbb38f60e6d285238debff Author: Sean Dewar <6256228+seandewar@users.noreply.github.com> Date: Tue Mar 12 20:46:12 2024 +0100 patch 9.1.0170: Re-allow curwin == prevwin, but document it instead Problem: more places exist where curwin == prevwin, and it may even be expected in some cases. Solution: revert v9.1.0001, but document that it's possible instead. (Sean Dewar) I've had a change of heart for the following reasons: - A quick 'n dirty [GitHub code search](https://github.com/search?q=%2F%28winnr%5C%28%5C%29%5Cs*%3D%3D%5Cs*winnr%5C%28%5B%27%22%5D%23%5B%27%22%5D%5C%29%7Cwinnr%5C%28%5B%27%22%5D%23%5B%27%22%5D%5C%29%5Cs*%3D%3D%5Cs*winnr%5C%28%5C%29%29%2F&type=code) reveals some cases where it's expected in the wild. Particularly, it made me aware `winnr() == winnr('#')` is possible when curwin is changed temporarily during the evaluation of a &statusline expression item (`%{...}`), and is used to show something different on the statusline belonging to the previous window; that behaviour wasn't changed in v9.1.0001, but it means curwin == prevwin makes sense in some cases. - The definition and call sites of back_to_prevwin imply some expectation that prevwin == wp (== curwin) is possible, as it's used to skip entering the prevwin in that case. - Prior to v9.1.0001, `:wincmd p` would not beep in the case that was patched in v9.1.0001, but now does. That resulted in #14047 being opened, as it affected the CtrlP plugin. I find it odd that `:wincmd p` had cases where it wouldn't beep despite doing nothing, but it may be preferable to keep things that way (or instead also beep if curwin == prevwin, if that's preferred). - After more digging, I found cases in win_free_mem, enter_tabpage, aucmd_restbuf and qf_open_new_cwindow where curwin == prevwin is possible (many of them from autocommands). Others probably exist too, especially in places where curwin is changed temporarily. fixes: #14047 closes: #14186 Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>

" Vim syntax file
" Language:	Renderman Interface Bytestream
" Maintainer:	Andrew Bromage <ajb@spamcop.net>
" Last Change:	2003 May 11
"

" quit when a syntax file was already loaded
if exists("b:current_syntax")
  finish
endif

syn case match

" Comments
syn match   ribLineComment      "#.*$"
syn match   ribStructureComment "##.*$"

syn case ignore
syn match   ribCommand	       /[A-Z][a-zA-Z]*/
syn case match

syn region  ribString	       start=/"/ skip=/\\"/ end=/"/

syn match   ribStructure	"[A-Z][a-zA-Z]*Begin\>\|[A-Z][a-zA-Z]*End"
syn region  ribSectionFold	start="FrameBegin" end="FrameEnd" fold transparent keepend extend
syn region  ribSectionFold	start="WorldBegin" end="WorldEnd" fold transparent keepend extend
syn region  ribSectionFold	start="TransformBegin" end="TransformEnd" fold transparent keepend extend
syn region  ribSectionFold	start="AttributeBegin" end="AttributeEnd" fold transparent keepend extend
syn region  ribSectionFold	start="MotionBegin" end="MotionEnd" fold transparent keepend extend
syn region  ribSectionFold	start="SolidBegin" end="SolidEnd" fold transparent keepend extend
syn region  ribSectionFold	start="ObjectBegin" end="ObjectEnd" fold transparent keepend extend

syn sync    fromstart

"integer number, or floating point number without a dot and with "f".
syn case ignore
syn match	ribNumbers	  display transparent "[-]\=\<\d\|\.\d" contains=ribNumber,ribFloat
syn match	ribNumber	  display contained "[-]\=\d\+\>"
"floating point number, with dot, optional exponent
syn match	ribFloat	  display contained "[-]\=\d\+\.\d*\(e[-+]\=\d\+\)\="
"floating point number, starting with a dot, optional exponent
syn match	ribFloat	  display contained "[-]\=\.\d\+\(e[-+]\=\d\+\)\=\>"
"floating point number, without dot, with exponent
syn match	ribFloat	  display contained "[-]\=\d\+e[-+]\d\+\>"
syn case match


hi def link ribStructure		Structure
hi def link ribCommand		Statement

hi def link ribStructureComment	SpecialComment
hi def link ribLineComment		Comment

hi def link ribString		String
hi def link ribNumber		Number
hi def link ribFloat		Float



let b:current_syntax = "rib"

" Options for vi: ts=8 sw=2 sts=2 nowrap noexpandtab ft=vim