どうも macOS Sierra に非対応のとのこと。Karabiner はカーネルにモジュール(KEXT)を読み込ませ、カーネル内部のキーイベントを操作することでキーバインドの変更を実現している模様だが、そのためカーネルの変更に弱い面がある。
一方の Apple はセキュリティ面やOSの安定稼働の面から、KEXT による拡張を抑制する方向にある。Microsoft も 64bit 移行やOSのアップグレードの機会を通じて電子署名されていないデバイスドライバはロードできないようにしているし、iOS のようなモバイルデバイスのOSでは、もはやカーネルにモジュールを追加することすら不可能になっている。
幸い、Karabiner では Karabiner Elements という新しいキーリマップソフトウェアを開発、そこから従来の Karabiner の機能を追加していく形で刷新するようで、これは期待が持たれる。とはいえ、一からの作り直しなのでしばらくは Karabiner なしの生活に耐えなければならないようだ。
私が Karabiner を使ってる理由は、実のところ「Microsoft Office で Emacs キーバインド(のサブセット)が使いたい」 につきる。Karabiner Elements では現在のところアプリケーションごとのキーマップというのは実装されてないので、これは対応できないことになる。
いい加減 面倒になってきたので色々探して試した結果、Hammerspoon を利用することに落ち着いた。Hammerspoon はキー入力などのイベントを Lua という言語を使ってカスタマイズするもので、単なるキーリマップ以上の操作もできるようだ。
また、Accessibility API を通じてキーイベントを取得、操作を行う。公式のAPI を通しているため、OSのアップデートによる影響も(KEXTを使うのに比べると)低い訳だ。
Hammerspoon は ~/.hammerspoon/init.lua というスクリプトを読み、これに応じて処理をおこなう。私のスクリプトは以下の通りだ。
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| -- disable all settings | |
| local passthrough = {} | |
| -- default key mappings | |
| local defaultKeyMapper = { | |
| {{"ctrl"}, 'a', {'ctrl'}, 'left' }, | |
| {{"ctrl"}, 'b', {}, 'left' }, | |
| {{"ctrl"}, 'e', {'ctrl'}, 'right' }, | |
| {{"ctrl"}, 'f', {}, 'right' }, | |
| {{"ctrl"}, 'h', {}, 'delete' }, | |
| {{"ctrl"}, 'n', {}, 'down' }, | |
| {{"ctrl"}, 'p', {}, 'up' }, | |
| } | |
| -- custom keymapping : Human readable configuration. modal object will be created dynamically from this. | |
| -- Four type of settings. | |
| -- "appname" = {} : default keymappings is applied and addtional keymappings is also applied. | |
| -- "appname*" = {} : only the keymappings is applied. defaults is ignored. | |
| -- "appname" = passthrough : no keymappings is applied. "pass through" | |
| -- "appname" = defaultKeyMapper : only the default keymappings is applied. | |
| -- | |
| -- modifier : fn, ctrl, option,alt, command,cmd, shift | |
| appKeyMappers = { | |
| ["Finder"] = passthrough, | |
| ["Terminal"] = passthrough, | |
| ["ターミナル"] = passthrough, | |
| ["CotEditor"] = passthrough, | |
| ["Code"] = passthrough, | |
| ["zoom.us"] = passthrough, | |
| ["Slack"] = passthrough, | |
| ["Google Chrome"] = passthrough, | |
| ["Windows App"] = passthrough, | |
| ["Screen Sharing"] = passthrough, | |
| ["画面共有"] = passthrough, | |
| ["Safari*"] = { | |
| {{"ctrl"}, 'b', {}, 'left' }, | |
| {{"ctrl"}, 'f', {}, 'right' }, | |
| {{"ctrl"}, 'h', {}, 'delete' }, | |
| {{"ctrl"}, 'n', {}, 'down' }, | |
| {{"ctrl"}, 'p', {}, 'up' }, | |
| {{"cmd"}, 'b', {"cmd","ctrl"},'1' }, | |
| }, | |
| ["VMware Fusion*"] = { | |
| {{"cmd"}, 'w', {}, 'w' }, | |
| }, | |
| -- ["ATOK お気に入り文書編集ツール"] = defaultKeyMapper, | |
| -- ["Microsoft Word"] = defaultKeyMapper, | |
| ["Microsoft OneNote"] = { | |
| {{"ctrl"}, 'k', {"ctrl","shift"}, 'right', {"cmd"}, 'x' }, | |
| {{"ctrl"}, 'y', {"cmd"}, 'v' }, | |
| }, | |
| ["Microsoft Excel"] = { | |
| {{"ctrl"}, 'return', {}, 'f2' }, | |
| }, | |
| -- custom keymapping | |
| ["Microsoft PowerPoint*"] = { | |
| {{"ctrl"}, 'a', {'cmd'}, 'left' }, | |
| {{"ctrl"}, 'b', {}, 'left' }, | |
| {{"ctrl"}, 'e', {'cmd'}, 'right' }, | |
| {{"ctrl"}, 'f', {}, 'right' }, | |
| {{"ctrl"}, 'h', {}, 'delete' }, | |
| {{"ctrl"}, 'n', {}, 'down' }, | |
| {{"ctrl"}, 'p', {}, 'up' }, | |
| }, | |
| ["Microsoft Outlook*"] = { | |
| {{"ctrl"}, 'a', {'ctrl'}, 'up' }, | |
| {{"ctrl"}, 'b', {}, 'left' }, | |
| {{"ctrl"}, 'e', {'ctrl'}, 'down' }, | |
| {{"ctrl"}, 'f', {}, 'right' }, | |
| {{"ctrl"}, 'h', {}, 'delete' }, | |
| {{"ctrl"}, 'n', {}, 'down' }, | |
| {{"ctrl"}, 'p', {}, 'up' }, | |
| {{"cmd"}, 'return', {}, 'return' }, | |
| {{"ctrl"}, 'return', {}, 'return' }, | |
| {{"ctrl"}, 'i', {'ctrl'}, 'k' }, | |
| {{"ctrl"}, 'o', {'ctrl'}, 'l' }, | |
| }, | |
| } | |
| delay = hs.eventtap.keyRepeatDelay() | |
| interval = hs.eventtap.keyRepeatInterval() | |
| function bindKeyMappers(keyMappers,modal) | |
| local i,mapper | |
| for i,mapper in ipairs(keyMappers) do | |
| if( #mapper == 4) then | |
| modal:bind(mapper[1], mapper[2], | |
| function() | |
| hs.eventtap.keyStroke(mapper[3],mapper[4], delay ) | |
| end, | |
| nil, | |
| function() | |
| hs.eventtap.keyStroke(mapper[3],mapper[4], interval ) | |
| end) | |
| elseif(#mapper == 6 ) then | |
| modal:bind(mapper[1], mapper[2], | |
| function() | |
| hs.eventtap.keyStroke(mapper[3],mapper[4]) | |
| hs.eventtap.keyStroke(mapper[5],mapper[6]) | |
| end, | |
| nil, nil) | |
| end | |
| end | |
| return modal | |
| end | |
| -- globals : | |
| -- appKeyModals contains modal objects for apps. modal objects are used for modify key inputs. | |
| -- modal object will be create one per apps. modal for passthrough and default key mapping will be shared by apps. | |
| -- | |
| -- 0 is modal for passthrough | |
| -- 1 is modal default key mapping | |
| -- "appname" is modal for the application | |
| appKeyModals = { | |
| [0] = hs.hotkey.modal.new( passthrough, nil ), | |
| [1] = bindKeyMappers( defaultKeyMapper, hs.hotkey.modal.new({}, nil ) ) | |
| } | |
| modal = appKeyModals[1] | |
| modal:enter() | |
| -- Disable if InputMethod is ATOK | |
| -- function imWatcher() | |
| -- ATOKsrc = "com.justsystems.inputmethod.atok31.Japanese" | |
| -- ABCsrc = "com.apple.keylayout.ABC" | |
| -- | |
| -- local source_id = hs.keycodes.currentSourceID() | |
| -- print("source_id: " .. source_id .. "\n") | |
| -- if( source_id == ATOKsrc ) then | |
| -- | |
| -- | |
| -- | |
| -- | |
| -- | |
| -- end | |
| -- hs.keycodes.inputSourceChanged( imWatcher ) | |
| -- main function | |
| function applicationWatcher(appName, eventType, appObject) | |
| if (eventType == hs.application.watcher.activated) then | |
| -- print(appName) | |
| modal:exit() | |
| local useDefault = true | |
| local keyMappers = appKeyMappers[appName] | |
| if( keyMappers == nil ) then | |
| keyMappers = appKeyMappers[appName.."*"] | |
| if( keyMappers ~= nil ) then | |
| useDefault = false | |
| -- print( "useDefault = false" ) | |
| end | |
| end | |
| if( keyMappers == nil ) then | |
| -- mapper isn't exist, use default modal. | |
| -- print("no definition:default") | |
| modal = appKeyModals[1] | |
| else | |
| modal = appKeyModals[appName] | |
| if( modal == nil ) then | |
| -- mapper is exist, but modal hasn't been created. | |
| if( keyMappers == passthrough ) then | |
| -- print("passthrough") | |
| modal = appKeyModals[0] | |
| elseif( keyMappers == defaultKeyMapper ) then | |
| -- print("default modal") | |
| modal = appKeyModals[1] | |
| else | |
| -- print("create new modal") | |
| modal = hs.hotkey.modal.new({}, nil ) | |
| if( useDefault ) then | |
| -- "appname*" | |
| bindKeyMappers(defaultKeyMapper, modal ) | |
| end | |
| bindKeyMappers(keyMappers, modal ) | |
| end | |
| appKeyModals[appName] = modal | |
| else | |
| -- modal is already exist, use existing one. | |
| -- print("use existing modal") | |
| -- print( appName ) | |
| end | |
| end | |
| -- print("set keymap") | |
| modal:enter() | |
| end | |
| end | |
| appWatcher = hs.application.watcher.new(applicationWatcher) | |
| appWatcher:start() |
