first attempt to make it leakless

run-shell/run-shell.lua

@@ -7,6 +7,10 @@
 -- @copyright 2018 Pavel Makhov
 -------------------------------------------------
 
+local capi = {
+    screen = screen,
+    client = client,
+}
 local awful = require("awful")
 local gfs = require("gears.filesystem")
 local wibox = require("wibox")
@@ -16,24 +20,38 @@ local completion = require("awful.completion")
 
 local run_shell = awful.widget.prompt()
 
-local w = wibox {
+
+local function get_screen(s)
+    return s and capi.screen[s]
+end
+
+
+local widget = {}
+
+function widget.new()
+    local widget_instance = {
+        _cached_wiboxes = {},
+    }
+
+
+    function widget_instance:_create_wibox()
+        local w = wibox {
             visible = false,
             ontop = true,
             height = 1060,
             width = 1920
-}
+        }
 
-w:setup {
+        w:setup {
             {
                 {
                     {
                         {
-                    text = '',
-                    font = 'Play 18',
+                            text = 'a',
+                            font = 'awesomewm-font 13',
                             widget = wibox.widget.textbox,
                         },
                         id = 'icon',
-                top = 9,
                         left = 10,
                         layout = wibox.container.margin
                     },
@@ -56,9 +74,25 @@ w:setup {
                 forced_height = 50
             },
             layout = wibox.container.place
-}
+        }
 
-local function launch(s)
+        return w
+    end
+
+    function widget_instance:launch(s, c)
+--        c = c or capi.client.focus
+--        s = s or (c and c.screen or awful.screen.focused())
+        s = 1
+        naughty.notify{text = 'screen ' .. s}
+        if not self._cached_wiboxes[s] then
+            self._cached_wiboxes[s] = {}
+            naughty.notify{text = 'nope'}
+        end
+        if not self._cached_wiboxes[s][1] then
+            self._cached_wiboxes[s][1] = self:_create_wibox()
+            naughty.notify{text = 'nope'}
+        end
+        local w = self._cached_wiboxes[s][1]
         awful.spawn.with_line_callback(os.getenv("HOME") .. "/.config/awesome/awesome-wm-widgets/run-shell/scratch_6.sh " .. tostring(awful.screen.focused().geometry.x), {
             stdout = function(line)
                 w.visible = true
@@ -76,6 +110,7 @@ local function launch(s)
                     done_callback = function()
                         --                    w.bgimage=''
                         w.visible = false
+                        w.bgimage = ''
                         awful.spawn([[bash -c 'rm -f /tmp/i3lock*']])
                     end
                 }
@@ -84,8 +119,22 @@ local function launch(s)
                 naughty.notify { text = "ERR:" .. line }
             end,
         })
+
+    end
+
+    return widget_instance
+ end
+
+local function get_default_widget()
+    if not widget.default_widget then
+        widget.default_widget = widget.new()
+    end
+    return widget.default_widget
 end
 
-return {
-    launch = launch
-}
+function widget.launch(...)
+    return get_default_widget():launch(...)
+end
+
+
+return widget