dotfiles/darwin/hammerspoon/Spoons/ControlEscape.spoon/init.lua
Noah Masur d021baa1bb split nixos from darwin
required because they don't share all attributes
2022-12-21 17:07:58 -07:00

113 lines
3.8 KiB
Lua

--- === 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.movements = 0
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 this change to the modifier keys does not involve a *change* to the
-- up/down state of the `control` key (i.e., it was up before and it's
-- still up, or it was down before and it's still down), then don't take
-- any action.
if self.lastModifiers["ctrl"] == newModifiers["ctrl"] then
return false
end
-- Control was not down but is now
if not self.lastModifiers["ctrl"] then
-- Only prepare to send escape if no other modifier keys are in use
self.lastModifiers = newModifiers
if not self.lastModifiers["cmd"] and not self.lastModifiers["alt"] then
self.sendEscape = true
self.movements = 0
end
-- Control was down and is up, hasn't been blocked by another key, and
-- isn't above the movement threshold
elseif self.sendEscape == true and not newModifiers["ctrl"] and self.movements < 30 then
self.lastModifiers = newModifiers
-- Allow for shift-escape
if newModifiers["shift"] then
hs.eventtap.keyStroke({ "shift" }, "escape", 0)
else
hs.eventtap.keyStroke(newModifiers, "escape", 0)
end
self.sendEscape = false
self.movements = 0
self.numberOfCharacters = 0
-- Control was down and is up, but isn't ready to send escape
else
self.lastModifiers = newModifiers
end
end)
-- If any other key is pressed, don't send escape
self.asModifier = hs.eventtap.new({ hs.eventtap.event.types.keyDown }, function(_)
self.sendEscape = false
-- print("Don't sent escape")
end)
-- If mouse is moving significantly, don't send escape
self.scrolling = hs.eventtap.new({ hs.eventtap.event.types.gesture }, function(event)
local touches = event:getTouches()
local i, v = next(touches, nil)
while i do
if v["phase"] == "moved" then
-- Increment the movement counter
self.movements = self.movements + 1
end
i, v = next(touches, i) -- get next index
end
end)
end
--- ControlEscape:start()
--- Method
--- Start sending `escape` when `control` is pressed and released in isolation
function obj:start()
self.controlTap:start()
self.asModifier:start()
self.scrolling: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()
self.asModifier:stop()
self.scrolling:stop()
-- Reset state
self.sendEscape = false
self.lastModifiers = {}
end
return obj