macOS Sierra：模拟鼠标向下和向上

Question

更新 Sierra 后，我不得不发现 Karabiner 不再工作，它可以很好地模拟指针点击。

有没有机会通过 Swift 或 Apple Script 或 Obj.C 获得它？

背景：使用Karabiner（和seil）我可以将caps-lock + d 向下和向上绑定到鼠标向下和向上以及在触控板移动之间。我的触控板不再处理按键，但对于指针移动仍然可以正常工作。

Answer 1

回答我自己，在hammerspoon 中破解它。让 chrome select 工作非常棘手，也许它可以节省一两个小时：

1 ~/.hammerspoon $ cat init.lua



--[[ Left Keyboard Mouse (alt-d)

The main problem was to get chrome based apps select text when we drag via
keyboard.

You MUST return true always in the handle_drag otherwise it fails to select.
FF works, terminal works, chrome apps (atom, ...) don't.

But true is preventing further processing of the drag coords,
hs.mouse.getAbsolutePosition remains constant while dragging (!)
=> i.e. we MUST calc them via DeltaX, DeltaY, see below.


--]]

hs.alert.show("Config loaded")

-- all mechanics stolen from here:
-- local vimouse = require('vimouse')
-- vimouse('cmd', 'm')

now = hs.timer.secondsSinceEpoch

evt = hs.eventtap
evte = evt.event
evtypes = evte.types
evp=evte.properties

drag_last = now(); drag_intv = 0.01 -- we only synth drags from time to time

mp = {['x']=0, ['y']=0} -- mouse point. coords and last posted event
l = hs.logger.new('keybmouse', 'debug')
dmp = hs.inspect

-- The event tap. Started with the keyboard click:
handled = {evtypes.mouseMoved, evtypes.keyUp }
handle_drag = evt.new(handled, function(e)

    if e:getType() == evtypes.keyUp then
        handle_drag:stop()
        post_evt(2)
        return nil -- otherwise the up seems not processed by the OS
    end

    mp['x']  = mp['x'] + e:getProperty(evp.mouseEventDeltaX)
    mp['y']  = mp['y'] + e:getProperty(evp.mouseEventDeltaY)

    -- giving the key up a chance:
    if now() - drag_last > drag_intv then
        -- l.d('pos', mp.x, 'dx', dx)
        post_evt(6) -- that sometimes makes dx negative in the log above
        drag_last = now()
    end
    return true -- important
end)

function post_evt(mode)
    -- 1: down, 2: up, 6: drag
    if mode == 1 or mode == 2 then
        local p = hs.mouse.getAbsolutePosition()
        mp['x'] = p.x
        mp['y'] = p.y
    end
    local e = evte.newMouseEvent(mode, mp)
    if mode == 6 then cs = 0 else cs=1 end
    e:setProperty(evte.properties.mouseEventClickState, cs)
    e:post()
end

hs.hotkey.bind({"alt"}, "d",
  function(event)
    post_evt(1)
    handle_drag:start()
  end
)

和 alt 我通过 karabiner 元素映射到 capslock。