Hammerspoon Fuzzy Window Switcher

hs-fuzzy-window-picker.lua

-- Fuzzy Window Switcher

_fuzzyChoices = nil
_fuzzyChooser = nil
_fuzzyLastWindow = nil

function fuzzyQuery(s, m)
	s_index = 1
	m_index = 1
	match_start = nil
	while true do
		if s_index > s:len() or m_index > m:len() then
			return -1
		end
		s_char = s:sub(s_index, s_index)
		m_char = m:sub(m_index, m_index)
		if s_char == m_char then
			if match_start == nil then
				match_start = s_index
			end
			s_index = s_index + 1
			m_index = m_index + 1
			if m_index > m:len() then
				match_end = s_index
				s_match_length = match_end-match_start
				score = m:len()/s_match_length
				return score
			end
		else
			s_index = s_index + 1
		end
	end
end

function _fuzzyFilterChoices(query)
	if query:len() == 0 then
		_fuzzyChooser:choices(_fuzzyChoices)
		return
	end
	pickedChoices = {}
	for i,j in pairs(_fuzzyChoices) do
		fullText = (j["text"] .. " " .. j["subText"]):lower()
		score = fuzzyQuery(fullText, query:lower())
		if score > 0 then
			j["fzf_score"] = score
			table.insert(pickedChoices, j)
		end
	end
	local sort_func = function( a,b ) return a["fzf_score"] > b["fzf_score"] end
	table.sort( pickedChoices, sort_func )
	_fuzzyChooser:choices(pickedChoices)
end

function _fuzzyPickWindow(item)
	if item == nil then
		if _fuzzyLastWindow then
			-- Workaround so last focused window stays focused after dismissing
			_fuzzyLastWindow:focus()
			_fuzzyLastWindow = nil
		end
		return
	end
	saveTime(6)
	id = item["windowID"]
	window = hs.window.get(id)
	window:focus()
end

function windowFuzzySearch()
	windows = hs.window.filter.default:getWindows(hs.window.filter.sortByFocusedLast)
	-- windows = hs.window.orderedWindows()
	_fuzzyChoices = {}
	for i,w in pairs(windows) do
		title = w:title()
		app = w:application():name()
		item = {
			["text"] = app,
			["subText"] = title,
			--["image"] = w:snapshot(),
			["windowID"] = w:id()
		}
		-- Handle special cases as necessary
		--if app == "Safari" and title == "" then
			-- skip, it's a weird empty window that shows up sometimes for some reason
		--else
			table.insert(_fuzzyChoices, item)
		--end
	end
	_fuzzyLastWindow = hs.window.focusedWindow()
	_fuzzyChooser = hs.chooser.new(_fuzzyPickWindow):choices(_fuzzyChoices):searchSubText(true)
	_fuzzyChooser:queryChangedCallback(_fuzzyFilterChoices) -- Enable true fuzzy find
	_fuzzyChooser:show()
end

hs.hotkey.bind({"cmd", "alt", "ctrl"}, "J", function()
	windowFuzzySearch()
end)

To get this working, remove the saveTime(6) from line 63

works ok to find open apps, does need to remove "saveTime(6)", does not differentiate between windows from the same app

this works better: https://github.com/minusf/FuzzySwitcher.spoon