how to quick switch between window a[pre] b[current]

[aabbcceedddd]

dear developer
I want to switch between the two most recent windows, A and B, using Alt+Tab, but I failed. Could you please give me some guidance? Thank you.

[dawsers]

You can use this script by @visixx like this in your config:

Store the script in ~/.config/scroll/scripts/alt_tab.lua

local args, state = ...

local scroll = require("scroll")

local function value_idx(tab, val)
	for index, value in ipairs(tab) do
		if value == val then
			return index
		end
	end

	return -1
end

local function on_focus(view, _)
	local focus_list = scroll.state_get_value(state, "focus_list")
	if focus_list == nil then
		focus_list = {}
	end

	local focus_idx = value_idx(focus_list, view)
	if focus_idx > 0 then
		table.remove(focus_list, focus_idx)
	end

	table.insert(focus_list, 1, view)
	scroll.state_set_value(state, "focus_list", focus_list)
end

local function on_destroy(view, _)
	local focus_list = scroll.state_get_value(state, "focus_list")
	if focus_list == nil then
		return
	end

	local focus_idx = value_idx(focus_list, view)
	if focus_idx == -1 then
		return
	end

	table.remove(focus_list, focus_idx)
	scroll.state_set_value(state, "focus_list", focus_list)
end

local function switch_to_prev()
	local focus_list = scroll.state_get_value(state, "focus_list")
	if #focus_list < 2 then
		return
	end

	local prev = focus_list[2]
  local container = scroll.view_get_container(prev)

	scroll.container_set_focus(container)
end

if args[1] == "init" then
	scroll.add_callback("view_focus", on_focus, nil)
	scroll.add_callback("view_unmap", on_destroy, nil)
elseif args[1] == "prev" then
	switch_to_prev()
end

Edit your config to initialize the script when starting scroll and assign Alt+Tab to prev, like this:

set $lua_scripts /home/xxxxx/.config/scroll/scripts

lua $lua_scripts/alt_tab.lua init
bindsym alt+tab lua $lua_scripts/alt_tab.lua prev

[safasfk]

the script works perfect, thanks :)