win autoclose option rework (should close issue #144)

lua/fzf-lua/core.lua

@@ -43,7 +43,7 @@ M.fzf = function(opts, contents)
   fzf_win:create()
   local selected = fzf.raw_fzf(contents, M.build_fzf_cli(opts),
     { fzf_binary = opts.fzf_bin })
-  if not opts.no_win_close then
+  if fzf_win:autoclose() == nil or fzf_win:autoclose() then
     fzf_win:close()
   end
   return selected

lua/fzf-lua/win.lua

@@ -170,6 +170,25 @@ function FzfWin:reset_win_highlights(win, is_border)
   vim.api.nvim_win_set_option(win, 'winhighlight', hl)
 end
 
+function FzfWin:_set_autoclose(autoclose)
+  if autoclose ~= nil then
+    self._autoclose = autoclose
+  else
+    self._autoclose = true
+  end
+  return self._autoclose
+end
+
+function FzfWin.set_autoclose(autoclose)
+  if not _self then return nil end
+  return _self:_set_autoclose(autoclose)
+end
+
+function FzfWin.autoclose()
+  if not _self then return nil end
+  return _self._autoclose
+end
+
 function FzfWin:new(o)
   if _self then
     -- utils.warn("Please close fzf-lua before starting a new instance")
@@ -182,6 +201,7 @@ function FzfWin:new(o)
   self.previewer = o.previewer
   self.previewer_type = o.previewer_type
   self._orphaned_bufs = {}
+  self:_set_autoclose(o.autoclose)
   _self = self
   return self
 end