patch 8.1.1884: cannot use mouse scroll wheel in popup in Insert mode commit https://github.com/vim/vim/commit/f0bc15c769b60f472d411b3ef98d57db510113c1 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 18 19:23:45 2019 +0200 patch 8.1.1884: cannot use mouse scroll wheel in popup in Insert mode Problem: Cannot use mouse scroll wheel in popup in Insert mode. Mouse clicks in popup close the popup menu. Solution: Check if the mouse is in a popup window. Do not let mouse events close the popup menu. (closes #4544)

" Vim compiler file
" Compiler:	onsgmls
" Maintainer:	Robert Rowsome <rowsome@wam.umd.edu>
" Last Change:	2019 Jul 23

if exists("current_compiler")
  finish
endif
let current_compiler = "onsgmls"

if exists(":CompilerSet") != 2		" older Vim always used :setlocal
  command -nargs=* CompilerSet setlocal <args>
endif

let s:cpo_save = &cpo
set cpo-=C

CompilerSet makeprg=onsgmls\ -s\ %:S

CompilerSet errorformat=onsgmls:%f:%l:%c:%t:%m,
		    \onsgmls:%f:%l:%c:%m

let &cpo = s:cpo_save
unlet s:cpo_save