(bugfix) set cursor shape to vertical bar on leaving vim

why:
to distinguish between command and normal modes of vi mode in
powershell

how:
using VimLeave event and guicursor option

misc:
see :help guicursor

links:
- neovim/neovim#4867
- microsoft/terminal#4335

tags:
cursor,cursor-shape

fixes #5

nvim/general/augroups.vim

@@ -26,11 +26,34 @@ augroup END
 " --- }}}
 
 " Cursor management --- {{{
+"https://github.com/microsoft/terminal/issues/4335
+"
+" https//vim.fandom.com/wiki/Configuring_the_cursor
+" 1 or 0 -> blinking block
+" 2 solid block
+" 3 -> blinking underscore
+" 4 solid underscore
+" Recent versions of xterm (282 or above) also support
+" 5 -> blinking vertical bar
+" 6 -> solid vertical bar
+"
 augroup CURSOR_MANAGEMENT
 	autocmd!
+
+" powershell requires different format for escape codes
+" see :
+" (i) https://docs.microsoft.com/en-us/powershell/module/psreadline/set-psreadlineoption?view=powershell-5.1#example-6--use-vimodechangehandler-to-display-vi-mode-changes
+" (ii) https://github.com/microsoft/terminal/issues/1604
+if has('win32')
+	"https://github.com/neovim/neovim/issues/4867#issuecomment-291249173"
+	autocmd VimEnter * silent !echo  -ne "\e[2 q"
+	autocmd VimLeave * set guicursor=a:ver25
+
+else
 	autocmd VimEnter * silent !echo  -ne "\e[2 q"
 	autocmd VimLeave * silent !echo -ne  "\e[6 q"
 " autocmd VimLeave * let &t_me="\<Esc>]50;CursorShape=1\x7"
 " autocmd VimLeave * let &t_SI.="\<Esc>[6 q"
+endif
 augroup END
 " }}

nvim/general/cursor.vim

@@ -0,0 +1,23 @@
+" also see augroups.vim
+" cursor ----- {{{
+" Cursor in terminal
+" https//vim.fandom.com/wiki/Configuring_the_cursor
+" 1 or 0 -> blinking block
+" 2 solid block
+" 3 -> blinking underscore
+" 4 solid underscore
+" Recent versions of xterm (282 or above) also support
+" 5 -> blinking vertical bar
+" 6 -> solid vertical bar
+if &term =~ '^xterm'
+	" normal mode ||
+	" .= means shorthand for appending : see help .=
+	let &t_EI .= "\<Esc>[1 q"
+	" replace mode _
+	let &t_SR .= "\e[4 q"
+	" insert mode |
+	let &t_SI .= "\<Esc>[6 q"
+endif
+"
+" }}}
+

nvim/init.vim

@@ -1,41 +1,21 @@
 let mapleader = "\<Space>"
 
 source $LOCALAPPDATA/nvim/general/augroups.vim
+
 source $LOCALAPPDATA/nvim/plugs/plugins.vim
 source $LOCALAPPDATA/nvim/plugs/coc.vim
 source $LOCALAPPDATA/nvim/plugs/lightline_v1.vim
 source $LOCALAPPDATA/nvim/plugs/telescope_plug.vim
 source $LOCALAPPDATA/nvim/plugs/firenvim.vim
 source $LOCALAPPDATA/nvim/plugs/markdown.vim
+
+source $LOCALAPPDATA/nvim/general/cursor.vim
 source $LOCALAPPDATA/nvim/general/general.vim
 source $LOCALAPPDATA/nvim/general/leader.vim
 source $LOCALAPPDATA/nvim/general/keybindings.vim
+
 source $LOCALAPPDATA/nvim/languages/languages.vim
 "set path+=**
 hi Normal ctermbg=none guibg=none
-"wrap backspace
-set backspace=indent,eol,start
 hi Comment gui=italic cterm=italic
 hi htmlArg gui=italic cterm=italic
-" cursor ----- {{{
-" Cursor in terminal
-" https//vim.fandom.com/wiki/Configuring_the_cursor
-" 1 or 0 -> blinking block
-" 2 solid block
-" 3 -> blinking underscore
-" 4 solid underscore
-" Recent versions of xterm (282 or above) also support
-" 5 -> blinking vertical bar
-" 6 -> solid vertical bar
-if &term =~ '^xterm'
-" normal mode ||
-let &t_EI .= "\<Esc>[1 q"
-" replace mode _
-let &t_SR.="\e[4 q"
-" insert mode |
-let &t_SI .= "\<Esc>[6 q"
-endif
-"
-" }}}
-
-