macos: don't recreate canvas on app switcher

modules/darwin/hammerspoon/Spoons/Launcher.spoon/init.lua

@@ -8,44 +8,44 @@ obj.name = "Launcher"
 obj.version = "0.1"
 obj.license = "MIT - https://opensource.org/licenses/MIT"
 
-function DrawSwitcher()
-    -- Drawing
 local width = hs.screen.mainScreen():fullFrame().w
 local switcherWidth = 500
-    local canv = hs.canvas.new({
+obj.canvas = hs.canvas.new({
     x = width / 2 - switcherWidth / 2,
     y = 1,
     h = 3,
     w = switcherWidth,
 })
-    canv[#canv + 1] = {
+-- Draw switcher
+obj.canvas[#obj.canvas + 1] = {
     action = "build",
     type = "rectangle",
 }
-    canv[#canv + 1] = {
+obj.canvas[#obj.canvas + 1] = {
     type = "rectangle",
     fillColor = { alpha = 1, red = 0.8, green = 0.6, blue = 0.3 },
     action = "fill",
 }
-    return canv:show()
-end
 
 function obj:init()
     -- Begin launcher mode
     if self.launcher == nil then
         self.launcher = hs.hotkey.modal.new("ctrl", "space")
+
+        print(self.canvas)
+        print(obj.canvas)
     end
 
     -- Behaviors on enter
     function self.launcher:entered()
         -- hs.alert("Entered mode")
-        self.canv = DrawSwitcher()
+        obj.canvas:show()
     end
 
     -- Behaviors on exit
     function self.launcher:exited()
         -- hs.alert("Exited mode")
-        self.canv:hide()
+        obj.canvas:hide()
     end
 
     -- Use escape to exit launcher mode
@@ -54,7 +54,8 @@ function obj:init()
     end)
 
     -- Launcher shortcuts
-    self.launcher:bind("ctrl", "space", function() end)
+    self.launcher:bind("ctrl", "space", function()
+    end)
     self.launcher:bind("", "return", function()
         self:switch("@kitty@")
     end)