wezterm-config/events.lua at main · TBadru/wezterm-config · GitHub

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local wezterm = require("wezterm")
local mux = wezterm.mux

wezterm.on("gui-startup", function()
	local _, _, window = mux.spawn_window({})
	window:gui_window():maximize()
end)

-- Font size readjustment function based on window resize
function readjust_font_size(window, pane)
	local window_dims = window:get_dimensions()
	local pane_dims = pane:get_dimensions()

	local config_overrides = {}
	local initial_font_size = 13 -- Set to your desired font size
	config_overrides.font_size = initial_font_size

	local max_iterations = 5
	local iteration_count = 0
	local tolerance = 3

	-- Calculate the initial difference between window and pane heights
	local current_diff = window_dims.pixel_height - pane_dims.pixel_height
	local min_diff = math.abs(current_diff)
	local best_font_size = initial_font_size

	-- Loop to adjust font size until the difference is within tolerance or max iterations reached
	while current_diff > tolerance and iteration_count < max_iterations do
		wezterm.log_info(
			string.format(
				"Win Height: %d, Pane Height: %d, Height Diff: %d, Curr Font Size: %.2f, Cells: %d, Cell Height: %.2f",
				window_dims.pixel_height,
				pane_dims.pixel_height,
				window_dims.pixel_height - pane_dims.pixel_height,
				config_overrides.font_size,
				pane_dims.viewport_rows,
				pane_dims.pixel_height / pane_dims.viewport_rows
			)
		)

		-- Increment the font size slightly
		config_overrides.font_size = config_overrides.font_size + 0.5
		window:set_config_overrides(config_overrides)

		-- Update dimensions after changing font size
		window_dims = window:get_dimensions()
		pane_dims = pane:get_dimensions()
		current_diff = window_dims.pixel_height - pane_dims.pixel_height

		-- Check if the current difference is the smallest seen so far
		local abs_diff = math.abs(current_diff)
		if abs_diff < min_diff then
			min_diff = abs_diff
			best_font_size = config_overrides.font_size
		end

		iteration_count = iteration_count + 1
	end

	-- If no acceptable difference was found, set the font size to the best one encountered
	if current_diff > tolerance then
		config_overrides.font_size = best_font_size
		window:set_config_overrides(config_overrides)
	end
end

-- Uncomment if you still want font resizing on window resizing
wezterm.on("window-resized", function(window, pane)
	readjust_font_size(window, pane)
end)