dotfiles/dot_config/awesome/lib/better-resize.lua

local capi = {
	client = client,
	mouse = mouse,
	screen = screen,
	mousegrabber = mousegrabber,
}
local awful = require("awful")

local function mouse_resize_handler(m, c)
	awful.client.incwfact(0, c) -- needed to fix normalization at start
	local start = m(capi.mouse.coords())
	local x, y = start.x, start.y
	local wa = m(c.screen.workarea)
	local idx = awful.client.idx(c)
	local c_above
	local idx_above, idx_below
	local wfact_above, wfact_below
	local jump_to = { x = x, y = y }
	local move_mwfact = false

	do
		local g = m(c:geometry())

		local v_border = 0.2 * g.height

		if idx and idx.idx > 1 and y >= g.y and y <= g.y + v_border then
			-- we are near the top edge of the window
			c_above = awful.client.next(-1, c)
			C_BELOW = c
			jump_to.y = g.y
			idx_above = idx.idx - 1
			idx_below = idx.idx
		elseif idx and idx.idx < idx.num and y >= g.y + g.height - v_border then
			-- we are near the bottom edge of the window
			c_above = c
			C_BELOW = awful.client.next(1, c)
			idx_above = idx.idx
			idx_below = idx.idx + 1
			jump_to.y = g.y + g.height
		end

		local mw_split = wa.x + wa.width * c.screen.selected_tag.master_width_factor

		if math.abs(mw_split - x) > wa.width / 6 then
			move_mwfact = false
		else
			move_mwfact = true
			jump_to.x = mw_split
		end
	end

	if idx and idx_above then
		local t = c.screen.selected_tag
		local data = t.windowfact or {}
		local colfact = data[idx.col] or {}
		wfact_above = colfact[idx_above] or 1
		wfact_below = colfact[idx_below] or 1
	end

	if idx_above and move_mwfact then
		CURSOR = "cross"
	elseif idx_above then
		CURSOR = m({ y = "sb_v_double_arrow", x = "sb_h_double_arrow" }).y
	elseif move_mwfact then
		CURSOR = m({ y = "sb_v_double_arrow", x = "sb_h_double_arrow" }).x
	else
		return false
	end

	capi.mouse.coords(m(jump_to))

	capi.mousegrabber.run(function(_mouse)
		if not c.valid then
			return false
		end

		local pressed = false
		for _, v in ipairs(_mouse.buttons) do
			if v then
				pressed = true
				break
			end
		end

		_mouse = m(_mouse)

		if pressed then
			if move_mwfact then
				c.screen.selected_tag.master_width_factor = math.min(math.max((_mouse.x - wa.x) / wa.width, 0.01), 0.99)
			end

			if idx and idx_above then
				local factor_delta = (_mouse.y - jump_to.y) / wa.height

				if factor_delta < 0 then
					factor_delta = math.max(factor_delta, -(wfact_above - 0.05))
				else
					factor_delta = math.min(factor_delta, wfact_below - 0.05)
				end

				local t = c.screen.selected_tag
				local data = t.windowfact or {}
				local colfact = data[idx.col] or {}
				colfact[idx_above] = wfact_above + factor_delta
				colfact[idx_below] = wfact_below - factor_delta
				awful.client.incwfact(0, c_above) -- just in case
			end
			return true
		else
			return false
		end
	end, CURSOR)

	return true
end

awful.layout.suit.tile.mouse_resize_handler = function(c)
	return mouse_resize_handler(function(x)
		return x
	end, c)
end
---@diagnostic disable-next-line: duplicate-set-field
awful.layout.suit.tile.bottom.mouse_resize_handler = function(c)
	return mouse_resize_handler(function(q)
		return { x = q.y, y = q.x, width = q.height, height = q.width }
	end, c)
end

-- local old_coords = mouse.coords

-- mouse.coords = function(...)
--    if select(1, ...) and not(select(1, ...).blah) then
--       print("set mouse!!!")
--       print(debug.traceback())

--    end
--    return old_coords(...)
-- end