From 0530c9c554a3fd9a1ea9f58e3d20e81f1aa75658 Mon Sep 17 00:00:00 2001
From: Noah Masur <7386960+nmasur@users.noreply.github.com>
Date: Mon, 17 May 2021 11:02:10 -0400
Subject: [PATCH] hammerspoon control escape

---
 .../Spoons/ControlEscape.spoon/init.lua       | 63 +++++++++++++++++++
 hammerspoon.symlink/init.lua                  |  1 +
 homebrew/Caskfile                             |  1 +
 3 files changed, 65 insertions(+)
 create mode 100644 hammerspoon.symlink/Spoons/ControlEscape.spoon/init.lua
 create mode 100644 hammerspoon.symlink/init.lua

diff --git a/hammerspoon.symlink/Spoons/ControlEscape.spoon/init.lua b/hammerspoon.symlink/Spoons/ControlEscape.spoon/init.lua
new file mode 100644
index 0000000..3e1471c
--- /dev/null
+++ b/hammerspoon.symlink/Spoons/ControlEscape.spoon/init.lua
@@ -0,0 +1,63 @@
+--- === ControlEscape ===
+---
+--- Adapted very loosely from https://github.com/jasonrudolph/ControlEscape.spoon
+--- Removed timing/delay; always send Escape as well as Control
+---
+--- Make the `control` key more useful: If the `control` key is tapped, treat it
+--- as the `escape` key. If the `control` key is held down and used in
+--- combination with another key, then provide the normal `control` key
+--- behavior.
+
+local obj={}
+obj.__index = obj
+
+-- Metadata
+obj.name = 'ControlEscape'
+obj.version = '0.1'
+obj.author = 'Jason Rudolph <jason@jasonrudolph.com>'
+obj.homepage = 'https://github.com/jasonrudolph/ControlEscape.spoon'
+obj.license = 'MIT - https://opensource.org/licenses/MIT'
+
+function obj:init()
+  self.sendEscape = false
+  self.lastModifiers = {}
+
+  -- Create an eventtap to run each time the modifier keys change (i.e., each
+  -- time a key like control, shift, option, or command is pressed or released)
+  self.controlTap = hs.eventtap.new({hs.eventtap.event.types.flagsChanged},
+    function(event)
+      local newModifiers = event:getFlags()
+      if not self.lastModifiers['ctrl'] then
+        if newModifiers['ctrl'] then
+          if newModifiers['shift'] then
+            hs.eventtap.keyStroke({'shift'}, 'escape', 0)
+          else
+            hs.eventtap.keyStroke(newModifiers, 'escape', 0)
+          end
+        end
+      end
+      self.lastModifiers = newModifiers
+    end
+  )
+end
+
+--- ControlEscape:start()
+--- Method
+--- Start sending `escape` when `control` is pressed and released in isolation
+function obj:start()
+  self.controlTap:start()
+end
+
+--- ControlEscape:stop()
+--- Method
+--- Stop sending `escape` when `control` is pressed and released in isolation
+function obj:stop()
+  -- Stop monitoring keystrokes
+  self.controlTap:stop()
+
+  -- Reset state
+  self.sendEscape = false
+  self.lastModifiers = {}
+end
+
+return obj
diff --git a/hammerspoon.symlink/init.lua b/hammerspoon.symlink/init.lua
new file mode 100644
index 0000000..ec04d67
--- /dev/null
+++ b/hammerspoon.symlink/init.lua
@@ -0,0 +1 @@
+hs.loadSpoon('ControlEscape'):start() -- Load Hammerspoon bits from https://github.com/jasonrudolph/ControlEscape.spoon
diff --git a/homebrew/Caskfile b/homebrew/Caskfile
index ffad461..75b636a 100644
--- a/homebrew/Caskfile
+++ b/homebrew/Caskfile
@@ -19,6 +19,7 @@ cask "scroll-reverser"               # Mouse vs. trackpad
 cask "meetingbar"                    # Scheduling
 cask "gitify"                        # GitHub notifications
 cask "basictex"                      # Small LaTeX distribution
+cask "hammerspoon"
 
 # Fonts
 tap "homebrew/cask-fonts"