Toggle folding on same buffer

resolves #169

autoload/sy/fold.vim

@@ -38,7 +38,6 @@ function! sy#fold#do() abort
     return
   endif
 
-  tabedit %
   let [s:context0, s:context1] = get(g:, 'signify_fold_context', [3, 8])
   let s:levels = s:get_levels(s:get_lines())
 
@@ -46,6 +45,13 @@ function! sy#fold#do() abort
   set foldtext=SignifyFoldText()
   set foldmethod=expr
   set foldlevel=0
+  let g:signify_fold = 1
+endfunction
+
+function! sy#fold#disable() "abort
+  set foldmethod=manual
+  normal zE
+  let g:signify_fold = 0
 endfunction
 
 " Function: s:get_lines {{{1
@@ -65,6 +71,19 @@ function! s:get_lines() abort
   return reverse(lines)
 endfunction
 
+" Function: #fold_toggle {{{1
+function! sy#fold#toggle() abort
+  if get(g:, 'signify_fold')
+    call sy#fold#disable()
+  else
+    call sy#fold#do()
+  endif
+
+  redraw!
+  call sy#start()
+endfunction
+" }}}
+
 " Function: s:get_levels {{{1
 function! s:get_levels(lines) abort
   let levels = {}

plugin/signify.vim

@@ -45,6 +45,7 @@ command! -nargs=0 -bar SignifyFold            call sy#fold#do()
 command! -nargs=0 -bar SignifyRefresh         call sy#util#refresh_windows()
 command! -nargs=0 -bar SignifyToggle          call sy#toggle()
 command! -nargs=0 -bar SignifyToggleHighlight call sy#highlight#line_toggle()
+command! -nargs=0 -bar SignifyToggleFold      call sy#fold#toggle()
 
 " Init: mappings {{{1