Created
May 17, 2023 11:07
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Hammerspoon (https://www.hammerspoon.org) script to add a custom key binding for vim mode in Xcode. Pressing two times the f-key within the time frame exits insert mode in normal vim mode.
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| local timer = require("hs.timer") | |
| local eventtap = require("hs.eventtap") | |
| local keycodes = require("hs.keycodes") | |
| local events = eventtap.event.types | |
| local timeFrame = 0.2 | |
| local f_key = 3 | |
| local pressTime, firstDown = 0, false | |
| function twoHandler() | |
| local frontmostAppName = hs.application.frontmostApplication():name() | |
| if frontmostAppName == "Xcode" then | |
| hs.eventtap.keyStroke({"ctrl"}, "h", 100, frontmostAppName) | |
| hs.eventtap.keyStroke({"ctrl"}, "h", 100, frontmostAppName) | |
| hs.eventtap.keyStroke({""}, "ESCAPE", 100, frontmostAppName) | |
| end | |
| end | |
| function isKeyCorrect(event) | |
| local keyCode = event:getKeyCode() | |
| return keyCode == f_key | |
| end | |
| function inTime(time) | |
| return timer.secondsSinceEpoch() - time < timeFrame | |
| end | |
| keydown = eventtap.new({ events.keyDown }, function(event) --keep keydown globally to ensure it stays alive | |
| if isKeyCorrect(event) then | |
| if firstDown and inTime(pressTime) then --if first press already happened and the second was in time | |
| twoHandler() | |
| elseif not firstDown or not inTime(pressTime) then --if the first press has not happened or the second wasn't in time | |
| pressTime, firstDown = timer.secondsSinceEpoch(), true --set first press time to now and first press to true | |
| return false --stop prematurely | |
| end | |
| end | |
| pressTime, firstDown = 0, false --if it reaches here that means the key was incorrect, then reset timer and flag | |
| return false --keeps the event propagating | |
| end | |
| ) --start our watcher | |
| keydown:start() |
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