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path: root/lua/user/modify-blend.lua
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local ui = vim.api.nvim_list_uis()[1]

local bufnr = vim.api.nvim_create_buf(false, true)
local win = vim.api.nvim_open_win(bufnr, true, {
  relative = "editor",
  width = ui.width,
  height = ui.height,
  row = 10,
  col = 10,
  style = "minimal",
})

vim.api.nvim_win_set_option(win, "winblend", 1)

local blend_start = 15
local offset = 1

CANCEL = false
local timer = vim.loop.new_timer()
timer:start(
  0,
  50,
  vim.schedule_wrap(function()
    blend_start = blend_start + offset

    if blend_start > 90 then
      offset = -1
    elseif blend_start < 10 then
      offset = 1
    end

    if CANCEL or not vim.api.nvim_win_is_valid(win) then
      timer:close()
      timer:stop()
      return
    end

    vim.cmd([[highlight NormalFloat blend=]] .. tostring(blend_start))
  end)
)