add cursor centering on focus

.mjolnir/init.lua

@@ -3,6 +3,7 @@ local hotkey = require "mjolnir.hotkey"
 local window = require "mjolnir.window"
 local fnutils = require "mjolnir.fnutils"
 local alert = require "mjolnir.alert"
+local cursor = require "mjolnir.jstevenson.cursor"
 
 local intense = {"ctrl", "shift", "alt"}
 local usual = {"ctrl", "shift"}
@@ -13,6 +14,13 @@ hotkey.bind(intense, "p", function()
     alert.show(important, 1)
 end)
 
+
+local center_cursor_on = function(win_obj)
+    local f = win_obj:frame()
+    cursor.warptopoint(f.x + (f.w / 2), f.y + (f.h / 2))
+end
+
+-- create a new switcher, assumes "intense" and "usual" modifiers
 local create_mjm_switcher = function(key_register)
     local this_id = 0 -- store window id
     local this_previous = 0  -- store window before switching focus
@@ -29,14 +37,17 @@ local create_mjm_switcher = function(key_register)
         local current = window.focusedwindow():id()
         if current == this_id then
             window.windowforid(this_previous):focus()
+            center_cursor_on(window.windowforid(this_previous))
         else
             this_previous = current
             window.windowforid(this_id):focus()
+            center_cursor_on(window.windowforid(this_id))
         end
     end)
 
 end
 
+-- add some bindings
 create_mjm_switcher("i")
 create_mjm_switcher("u")
 create_mjm_switcher("o")