-- originally taken from the FAQ

vim.g.gui_font_default_size = 14
vim.g.gui_font_size = vim.g.gui_font_default_size
vim.g.gui_font_face = "Comic Code Ligatures"

RefreshGuiFont = function()
    vim.opt.guifont = string.format("%s:h%s", vim.g.gui_font_face, vim.g.gui_font_size)
end

ResizeGuiFont = function(delta)
    vim.g.gui_font_size = vim.g.gui_font_size + delta
    RefreshGuiFont()
end

ResetGuiFont = function()
    vim.g.gui_font_size = vim.g.gui_font_default_size
    RefreshGuiFont()
end

-- Call function on startup to set default value
ResetGuiFont()

-- Keymaps

local opts = { noremap = true, silent = true }

vim.keymap.set({ 'n', 'i' }, "<C-+>", function() ResizeGuiFont(1) end, opts)
vim.keymap.set({ 'n', 'i' }, "<C-_>", function() ResizeGuiFont(-1) end, opts)