Hammerspoon config

init.lua

-- Misc setup
hs.window.animationDuration = 0
local vw = hs.inspect.inspect
local configFileWatcher = nil
local appWatcher = nil

-- Keyboard modifiers, Capslock bound to cmd+alt+ctrl+shift via Seil and Karabiner
local modNone  = {""}
local mAlt     = {"⌥"}
local modCmd   = {"⌘"}
local modShift = {"⇧"}
local modHyper = {"⌘", "⌥", "⌃"}

-- Cycle args for function when called repeatedly: cycleCalls( fn, { {args1...}, ... } )
function cycleCalls( fn, args )
  local argIndex = 0
  return function()
    argIndex = argIndex + 1
    if (argIndex > #args) then
      argIndex = 1;
    end
    fn( args[ argIndex ] );
  end
end

-- This method used to place a window to a position and size on the screen by using 
-- four floats instead of pixel sizes. Returns the window instance. Examples:
--   windowToGrid( window, 0, 0, 0.25, 0.5 );  -- top-left, width: 25%, height: 50%
--   windowToGrid( someWindow, 0.3, 0.2, 0.5, 0.35 ); -- top: 30%, left: 20%, width: 50%, height: 35%
function windowToGrid( window, rect )
  if not window then
    return window
  end

  local screen = hs.screen.mainScreen():fullFrame()
  window:setFrame( {
    x = math.floor( rect[1] * screen.w + .5 ) + screen.x,
    y = math.floor( rect[2] * screen.h + .5 ) + screen.y,
    w = math.floor( rect[3] * screen.w + .5 ),
    h = math.floor( rect[4] * screen.h + .5 )
  } )
  return window
end

function toGrid( x, y, w, h )
  windowToGrid( hs.window.focusedWindow(), x, y, w, h );
end

modal = hs.hotkey.modal.new(modHyper,'w')

function modal:entered() 
  hs.alert.closeAll(); 
  hs.alert.show( "Window manager active", 999999 )
end

function modal:exited() 
  hs.alert.closeAll() 
end

modal:bind('','escape', function() modal:exit() end)
modal:bind('','return', function() modal:exit() end)

-- Modal keys
-- Centre window
modal:bind('','c',cycleCalls( toGrid, {{0.2, 0.15, 0.6, 0.75}, {0.1, 0.05, 0.8, 0.90}, {0, 0, 1, 1}} ) )
-- Size/position to one side of the screen
modal:bind('','left',  cycleCalls( toGrid,{{0,   0, 0.5, 1}, {0,   0, 0.6, 1},{0,   0,  0.4, 1}}));
modal:bind('','right', cycleCalls( toGrid,{{0.5, 0, 0.5, 1}, {0.4, 0, 0.6, 1},{0.6, 0, 0.4, 1}}));
modal:bind('','up',    cycleCalls( toGrid,{{0, 0,   1, 0.3}, {0, 0,   1, 0.7}}));
modal:bind('','down',  cycleCalls( toGrid,{{0, 0.7, 1, 0.3}, {0, 0.3, 1, 0.7}}));

-- Reload config automatically
function reloadConfig()
  configFileWatcher:stop()
  configFileWatcher = nil
  appWatcher:stop()
  appWatcher = nil
  hs.reload()
end

configFileWatcher = hs.pathwatcher.new(os.getenv("HOME") .. "/.hammerspoon/", reloadConfig)
configFileWatcher:start()

-- Callback function for application events
function applicationWatcher(appName, eventType, appObject)
  if (eventType == hs.application.watcher.activated) then
    if (appName == "Finder") then
      -- Bring all Finder windows forward when one gets activated
      appObject:selectMenuItem({"Window", "Bring All to Front"})
    end
  end
end

appWatcher = hs.application.watcher.new(applicationWatcher)
appWatcher:start()

switcher = require "hs.window.switcher"
filter = require "hs.window.filter"
switcher = switcher.new(filter.new():setDefaultFilter{}, {
    showSelectedThumbnail = false,
    thumbnailSize         = 128,
    showTitles            = true,
    textSize              = 15,
    textColor             = { 1.0, 1.0, 1.0, 0.75 },
    backgroundColor       = { 0.3, 0.3, 0.3, 0.75 },
    highlightColor        = { 0.8, 0.5, 0.0, 0.80 },
    titleBackgroundColor  = { 0.0, 0.0, 0.0, 0.75 },
})
hs.hotkey.bind('alt', 'tab', function() switcher:next() end)
hs.hotkey.bind('alt-shift', 'tab', function() switcher:previous() end)

-- Finally, show a notification that we finished loading the config
hs.notify.new( {title='Hammerspoon', subTitle='Configuration loaded'} ):send()