Add hammerspoon. Almost usable now...

wm/hammerspoon/escapeControlDouble.lua

@@ -0,0 +1,54 @@
+local eventtap = require("hs.eventtap")
+local keycodes = require("hs.keycodes")
+keycodes = keycodes.map
+local events = eventtap.event.types
+
+local module = {}
+
+local escPressed = false
+local otherPressed = false
+local recursion = false
+
+module.addModifier = function(ev)
+  ev:setFlags({['cmd'] = true})
+  return ev
+end
+
+module.eventWatcher = eventtap.new({events.keyDown, events.keyUp}, function(ev)
+  if recursion then
+    recursion = false
+    return false
+  end
+  if ev:getKeyCode() == keycodes['escape'] then
+    if ev:getType() == events.keyDown then
+      if not escPressed then
+         --hs.alert("esc down")
+        escPressed = true
+        otherPressed = false
+        return true
+      end
+    else
+       --hs.alert("esc up")
+      escPressed = false
+      if not otherPressed then
+         --hs.alert("escape")
+        ev = eventtap.event.newKeyEvent({}, 'escape', true)
+        recursion = true
+        ev:post()
+      else
+        --escPressed = false
+      end
+      return true
+    end
+  elseif escPressed and ev:getType() == events.keyDown then
+    otherPressed = true
+    ev = module.addModifier(ev)
+    recursion = true
+    ev:post()
+    return true
+  end
+  return false
+end):start()
+
+return module
+