feat: hammerspoon & karabiner-elements

Signed-off-by: Ismo Vuorinen <ismo@ivuorinen.net>

base/hammerspoon/init.lua

@@ -0,0 +1,204 @@
+-- ╭─────────────────────────────────────────────────────────╮
+-- │                 Hammerspoon config file                 │
+-- ╰─────────────────────────────────────────────────────────╯
+-- init.lua — Pure Hammerspoon window controls
+-- Converted from skhdrc logic; expanded with per‑display grids,
+-- app rules with groups, wrap‑around focus, cross‑display moves,
+-- and overlay/notification toggles.
+-- Author: Ismo Vuorinen (ivuorinen)
+
+--------------------------------------------------
+-- Caps Lock as Meh key (Shift+Control+Alt)
+--------------------------------------------------
+-- Prerequisites:
+-- 1. Go to System Settings → Keyboard → Keyboard Shortcuts → Modifier Keys
+-- 2. Set Caps Lock to "No Action" (you mentioned you already did this)
+-- 3. Install Karabiner-Elements: brew install --cask karabiner-elements
+-- 4. Open Karabiner-Elements, go to "Simple Modifications"
+-- 5. Add: caps_lock → f18
+--
+-- Then you can use F18 as your Meh key in Hammerspoon:
+local f18 = hs.hotkey.modal.new()
+
+-- Capture F18 key press/release
+hs.hotkey.bind({}, 'F18', function()
+  f18:enter()
+end, function()
+  f18:exit()
+end)
+
+-- Meh (F18/Caps Lock) key bindings for window management
+-- These provide quick access to common window operations
+
+-- Helper function to get focused window
+local function W()
+  return hs.window.focusedWindow()
+end
+
+-- Window positioning: thirds (U/I/O)
+f18:bind({}, 'u', function()
+  local w = W()
+  if w then
+    w:moveToUnit({ x = 0, y = 0, w = 1 / 3, h = 1 }, 0)
+  end
+end)
+f18:bind({}, 'i', function()
+  local w = W()
+  if w then
+    w:moveToUnit({ x = 1 / 3, y = 0, w = 1 / 3, h = 1 }, 0)
+  end
+end)
+f18:bind({}, 'o', function()
+  local w = W()
+  if w then
+    w:moveToUnit({ x = 2 / 3, y = 0, w = 1 / 3, h = 1 }, 0)
+  end
+end)
+
+-- Window positioning: half width, full height (Y)
+f18:bind({}, 'y', function()
+  local w = W()
+  if w then
+    w:moveToUnit({ x = 0, y = 0, w = 0.5, h = 1 }, 0)
+  end
+end)
+
+-- Cycle through all windows (H/L)
+-- We need to maintain state to properly cycle through all windows
+local windowCycleIndex = 1
+local windowCycleList = {}
+local lastCycleTime = 0
+
+local function getWindowCycleList()
+  local currentTime = hs.timer.secondsSinceEpoch()
+  -- Reset if more than 2 seconds have passed since last cycle
+  if currentTime - lastCycleTime > 2 then
+    windowCycleIndex = 1
+    windowCycleList = hs.window.orderedWindows()
+  end
+  lastCycleTime = currentTime
+  return windowCycleList
+end
+
+f18:bind({}, 'h', function()
+  local windows = getWindowCycleList()
+  if #windows <= 1 then
+    return
+  end
+
+  -- Cycle backward
+  windowCycleIndex = windowCycleIndex - 1
+  if windowCycleIndex < 1 then
+    windowCycleIndex = #windows
+  end
+
+  windows[windowCycleIndex]:focus()
+end)
+
+f18:bind({}, 'l', function()
+  local windows = getWindowCycleList()
+  if #windows <= 1 then
+    return
+  end
+
+  -- Cycle forward
+  windowCycleIndex = windowCycleIndex + 1
+  if windowCycleIndex > #windows then
+    windowCycleIndex = 1
+  end
+
+  windows[windowCycleIndex]:focus()
+end)
+
+-- Window sizing: maximize (Up/J) and center (Down)
+f18:bind({}, 'up', function()
+  local w = W()
+  if w then
+    w:maximize(0)
+  end
+end)
+f18:bind({}, 'j', function()
+  local w = W()
+  if w then
+    w:maximize(0)
+  end
+end)
+f18:bind({}, 'down', function()
+  local w = W()
+  if not w then
+    return
+  end
+  local f = w:frame()
+  local sf = w:screen():frame()
+  if f.w < sf.w * 0.95 then
+    w:maximize(0)
+  else
+    local ww, hh = math.floor(sf.w * 0.5), math.floor(sf.h * 0.9)
+    local xx = sf.x + math.floor((sf.w - ww) / 2)
+    local yy = sf.y + math.floor((sf.h - hh) / 2)
+    w:setFrame({ x = xx, y = yy, w = ww, h = hh }, 0)
+  end
+end)
+f18:bind({}, 'k', function()
+  local w = W()
+  if w then
+    local sf = w:screen():frame()
+    local ww, hh = math.floor(sf.w * 0.9), math.floor(sf.h * 0.9)
+    local xx = sf.x + math.floor((sf.w - ww) / 2)
+    local yy = sf.y + math.floor((sf.h - hh) / 2)
+    w:setFrame({ x = xx, y = yy, w = ww, h = hh }, 0)
+  end
+end)
+
+-- Move to next/previous screen (. and ,)
+f18:bind({}, '.', function()
+  local w = W()
+  if w then
+    local s = w:screen()
+    local ns = s:toEast() or s:toWest()
+    if ns then
+      w:moveToScreen(ns, true, true, 0)
+    end
+  end
+end)
+f18:bind({}, ',', function()
+  local w = W()
+  if w then
+    local s = w:screen()
+    local ps = s:toWest() or s:toEast()
+    if ps then
+      w:moveToScreen(ps, true, true, 0)
+    end
+  end
+end)
+
+-- Window positioning: halves (Left/Right arrows)
+f18:bind({}, 'left', function()
+  local w = W()
+  if w then
+    w:moveToUnit(hs.layout.left50, 0)
+  end
+end)
+f18:bind({}, 'right', function()
+  local w = W()
+  if w then
+    w:moveToUnit(hs.layout.right50, 0)
+  end
+end)
+
+-- Paste from clipboard with Meh + V
+f18:bind({}, 'v', function()
+  hs.eventtap.keyStrokes(hs.pasteboard.getContents())
+end)
+
+-- Paste 1Password secret with Meh + P
+f18:bind({}, 'p', function()
+  local output, status = hs.execute('op read "op://Svea/3hzhctmvovbwlgulv7mgy25rf4/login-input"', true)
+  if status then
+    hs.eventtap.keyStrokes(output:gsub('%s+$', '')) -- trim trailing whitespace
+  else
+    hs.alert.show('1Password CLI error')
+  end
+end)
+
+-- require 'generate_emmylua'