fade.lua

local stages_util = require("notify.stages.util")

return function(direction)
  return {
    function(state)
      local next_height = state.message.height + 2
      local next_row = stages_util.available_slot(state.open_windows, next_height, direction)
      if not next_row then
        return nil
      end
      return {
        relative = "editor",
        anchor = "NE",
        width = state.message.width,
        height = state.message.height,
        col = vim.opt.columns:get(),
        row = next_row,
        border = "rounded",
        style = "minimal",
        opacity = 0,
      }
    end,
    function()
      return {
        opacity = { 100 },
        col = { vim.opt.columns:get() },
      }
    end,
    function()
      return {
        col = { vim.opt.columns:get() },
        time = true,
      }
    end,
    function()
      return {
        opacity = {
          0,
          frequency = 2,
          complete = function(cur_opacity)
            return cur_opacity <= 4
          end,
        },
        col = { vim.opt.columns:get() },
      }
    end,
  }
end