From b300c2b94904776326041e1395dc3f8e1dbaaf6c Mon Sep 17 00:00:00 2001
From: Scott Mcdermott <scott@smemsh.net>
Date: Thu, 23 May 2024 07:38:41 -0700
Subject: [PATCH 1/2] Make the maps install/uninstall driven by callable
 functions

this allows to "disable" and "enable" smart tabs, by putting all the
maps in functions.  we also have an autocommand we need to
install/uninstall during enable/disable
---
 plugin/stabs.vim | 107 ++++++++++++++++++++++++++++++++++-------------
 1 file changed, 77 insertions(+), 30 deletions(-)

diff --git a/plugin/stabs.vim b/plugin/stabs.vim
index 0391aea..7a6dce5 100644
--- a/plugin/stabs.vim
+++ b/plugin/stabs.vim
@@ -17,14 +17,6 @@ if !exists('g:stabs_insert_leave')
 endif
 
 
-if g:stabs_maps =~ 't'
-	inoremap <silent> <expr> <tab> StabsTab()
-endif
-
-if g:stabs_maps =~ 'b'
-	inoremap <silent> <expr> <BS> StabsBS()
-endif
-
 " TODO: Properly add CTRL-d and CTRL-t mappings
 "imap <silent> <expr> <c-d> :call <SID>SmartDeleteTab()<CR>
 "imap <silent> <c-t> <SID>SmartInsertTab()
@@ -83,12 +75,6 @@ if g:stabs_insert_leave
 			exe 's/'.s:GetIndentRegex().' *$//e'
 		endif
 	endfun
-
-	" Remove indentation tabs when leaving insert mode
-	augroup Stabs
-		autocmd!
-		autocmd InsertLeave * call <SID>CheckLeaveLine(line('.'))
-	augroup END
 endif
 
 
@@ -225,22 +211,6 @@ fun! StabsCR()
 	endif
 endfun
 
-if g:stabs_maps =~ 'c'
-	inoremap <silent> <expr> <CR> StabsCR()
-endif
-" Notice \<lt>END> results in \<END>, which is the end key
-if g:stabs_maps =~ 'o'
-	nnoremap <silent> o o<c-r>=StabsFixAlign(line('.'))."\<lt>END>"<CR>
-endif
-if g:stabs_maps =~ 'O'
-	nnoremap <silent> O O<c-r>=StabsFixAlign(line('.'))."\<lt>END>"<CR>
-endif
-
-" The = is implemented by remapping it so that it calls the original = and
-" then checks all indents using StabsFixAlign.
-if g:stabs_maps =~ '='
-	nnoremap <silent> <expr> = StabsEqual()
-endif
 fun! StabsEqual()
 	set operatorfunc=StabsRedoIndent
 	" Call the operator func so we get the range
@@ -297,6 +267,83 @@ fun! s:RetabIndent( bang, firstl, lastl, tab )
 	if newtabstop != &tabstop | let &tabstop = newtabstop | endif
 endfun
 
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function StabsInstall()
+
+	if g:stabs_active | return | endif
+
+	" imaps
+	if g:stabs_maps =~ 't'
+		inoremap <silent> <expr> <tab> StabsTab()
+	endif
+	if g:stabs_maps =~ 'b'
+		inoremap <silent> <expr> <BS> StabsBS()
+	endif
+	if g:stabs_maps =~ 'c'
+		inoremap <silent> <expr> <CR> StabsCR()
+	endif
+
+	" nmaps
+	if g:stabs_maps =~ 'o'
+		" Notice \<lt>END> results in \<END>, which is the end key
+		nnoremap <silent> o
+		\ o<c-r>=StabsFixAlign(line('.'))."\<lt>END>"<CR>
+	endif
+	if g:stabs_maps =~ 'O'
+		nnoremap <silent> O
+		\ O<c-r>=StabsFixAlign(line('.'))."\<lt>END>"<CR>
+	endif
+	if g:stabs_maps =~ '='
+		" The = is implemented by remapping it so that it calls the
+		" original = and then checks all indents using StabsFixAlign.
+		nnoremap <silent> <expr> =
+		\ StabsEqual()
+	endif
+
+	" autocmds
+	if g:stabs_insert_leave
+		augroup Stabs
+		au!
+		autocmd InsertLeave * call <SID>CheckLeaveLine(line('.'))
+		augroup END
+	endif
+
+	let g:stabs_active = 1
+endfunc
+
+function StabsUninstall()
+
+	if !g:stabs_active | return | endif
+
+	if g:stabs_maps =~ 't'
+		iunmap <tab>
+	endif
+	if g:stabs_maps =~ 'b'
+		iunmap <bs>
+	endif
+	if g:stabs_maps =~ 'c'
+		iunmap <cr>
+	endif
+	if g:stabs_maps =~ 'o'
+		nunmap o
+	endif
+	if g:stabs_maps =~ 'O'
+		nunmap O
+	endif
+	if g:stabs_maps =~ '='
+		nunmap =
+	endif
+	if g:stabs_insert_leave
+		autocmd! Stabs
+	endif
+
+	let g:stabs_active = 0
+endfunc
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+call StabsInstall()
 
 " Retab the indent of a file - ie only the first nonspace.
 "   Optional argument specified the value of the new tabstops

From 28f71bca65fe60ceafc51cc9ab7535af171ae630 Mon Sep 17 00:00:00 2001
From: Scott Mcdermott <scott@smemsh.net>
Date: Thu, 23 May 2024 07:42:29 -0700
Subject: [PATCH 2/2] Add a stabs mode toggle function

This allows only a single map to be used, driven by state retained in a
single global variable
---
 plugin/stabs.vim | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/plugin/stabs.vim b/plugin/stabs.vim
index 7a6dce5..4e153ba 100644
--- a/plugin/stabs.vim
+++ b/plugin/stabs.vim
@@ -3,7 +3,6 @@ if exists('g:loaded_stabs') && g:loaded_stabs
 endif
 let g:loaded_stabs = 1
 
-
 if !exists('g:stabs_indent_regex')
 	let g:stabs_indent_regex = '^\t*'
 endif
@@ -341,9 +340,14 @@ function StabsUninstall()
 	let g:stabs_active = 0
 endfunc
 
+function StabsToggle()
+	if !exists('g:stabs_active') | let g:stabs_active = 0 | endif
+	call function(g:stabs_active ? 'StabsUninstall' : 'StabsInstall')()
+endfunc
+
 """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 
-call StabsInstall()
+call StabsToggle()
 
 " Retab the indent of a file - ie only the first nonspace.
 "   Optional argument specified the value of the new tabstops