Hammerspoonの設定

init.lua

--
-- Hammerspoon用 KeyRemap 設定
--

local function keyCode(key, modifiers)
   modifiers = modifiers or {}
   return function()
      hs.eventtap.event.newKeyEvent(modifiers, string.lower(key), true):post()
      hs.timer.usleep(1000)
      hs.eventtap.event.newKeyEvent(modifiers, string.lower(key), false):post()
   end
end

local function remapKey(modifiers, key, keyCode)
   hs.hotkey.bind(modifiers, key, keyCode, nil, keyCode)
end

local function disableAllHotkeys()
   for k, v in pairs(hs.hotkey.getHotkeys()) do
      v['_hk']:disable()
   end
end

local function enableAllHotkeys()
   for k, v in pairs(hs.hotkey.getHotkeys()) do
      v['_hk']:enable()
   end
end

local function handleGlobalAppEvent(name, event, app)
   if event == hs.application.watcher.activated then
      -- hs.alert.show(name)
      if name ~= "iTerm2|RStudio|Colaboratory" then
         enableAllHotkeys()
      else
         disableAllHotkeys()
      end
      if name == 'Code' then
        for i, key in ipairs(remapKeys) do
          key:disable()
        end
      end
   end
end

appsWatcher = hs.application.watcher.new(handleGlobalAppEvent)
appsWatcher:start()

--
-- ここから KeyRemap 設定
--

-- カーソル移動
-- 現状 hs.hotkey.bind の挙動が怪しいので getFlags+getKeyCode を使うといい
hs.eventtap.new({hs.eventtap.event.types.keyDown}, function(e)
  -- Ctrl + Shift + FBNP（ctrl単体のものよりより先に書く必要がある）
  if e:getFlags().ctrl and e:getFlags().shift then
    if e:getKeyCode() == 35 then
      hs.eventtap.event.newKeyEvent({"shift"}, "up", true):post(); return true;
    elseif e:getKeyCode() == 11 then
      hs.eventtap.event.newKeyEvent({"shift"}, "left", true):post(); return true;
    elseif e:getKeyCode() == 45 then
      hs.eventtap.event.newKeyEvent({"shift"}, "down", true):post(); return true;
    elseif e:getKeyCode() == 3 then
      hs.eventtap.event.newKeyEvent({"shift"}, "right", true):post(); return true;
    elseif e:getKeyCode() == 6 then
      hs.eventtap.event.newKeyEvent({'shift','cmd'}, 'z', true):post(); return true;
    end
  end

  -- Ctrl + FBNP
  if e:getFlags().ctrl then
    -- log の吐き方
    -- local log = hs.logger.new('mymodule','debug')
    -- log.i(e:getKeyCode())
    if e:getKeyCode() == 35 then
      hs.eventtap.event.newKeyEvent({}, 'up', true):post(); return true;
    elseif e:getKeyCode() == 11 then
      hs.eventtap.event.newKeyEvent({}, 'left', true):post(); return true;
    elseif e:getKeyCode() == 45 then
      hs.eventtap.event.newKeyEvent({}, 'down', true):post(); return true;
    elseif e:getKeyCode() == 3 then
      hs.eventtap.event.newKeyEvent({}, 'right', true):post(); return true;
    -- PCライクなバインディング、たとえば
    -- ctrl + W を cmd + W にするのも hs.hotkey.bind だと何故か出来ないので
    -- こっちの方法を使っている
    -- elseif e:getKeyCode() == 6 then
    --   hs.eventtap.event.newKeyEvent({'cmd'}, 'z', true):post(); return true;
    -- elseif e:getKeyCode() == 7 then
    --   hs.eventtap.event.newKeyEvent({'cmd'}, 'x', true):post(); return true;
    -- elseif e:getKeyCode() == 8 then
    --   hs.eventtap.event.newKeyEvent({'cmd'}, 'c', true):post(); return true;
    -- elseif e:getKeyCode() == 9 then
    --   hs.eventtap.event.newKeyEvent({'cmd'}, 'v', true):post(); return true;
    -- elseif e:getKeyCode() == 13 then
    --   hs.eventtap.event.newKeyEvent({'cmd'}, 'w', true):post(); return true;
    -- elseif e:getKeyCode() == 46 then
      -- hs.eventtap.event.newKeyEvent({}, 'return', true):post(); return true;
      -- hs.eventtap.keyStroke({}, 'return');
    end
  end

  return false
end):start()

remapKey({"ctrl"}, "a", keyCode("left", {"cmd"}))
remapKey({"ctrl"}, "e", keyCode("right", {"cmd"}))

remapKey({"alt"}, "b", keyCode("left", {"alt"}))
remapKey({"alt"}, "f", keyCode("right", {"alt"}))
remapKey({"alt"}, "n", keyCode("down", {"alt"}))
remapKey({"alt"}, "p", keyCode("up", {"alt"}))

remapKey({"alt"}, "h", keyCode('delete', {"alt"}))
local function deleteWordForward()
  keyCode('right', {'shift', 'alt'})()
  keyCode('delete')()
end
remapKey({'alt'}, 'd', deleteWordForward)

-- Return
remapKey({'ctrl'}, 'm', keyCode('return'))

-- Delete
remapKey({'ctrl'}, 'h', keyCode('delete'))

-- ページスクロール
remapKey({'ctrl'}, 'v', keyCode('pagedown'))
remapKey({'ctrl'}, 'z', keyCode('pageup'))

-- Esc
remapKey({'ctrl'}, 'g', keyCode('escape'))

-- undo
remapKey({'ctrl'}, '/', keyCode('z', {'cmd'}))