An warning notification beyond expected when colorscheme was set to transparent background

[zhang-stephen]

As this screenshot, nvim-notify will give a warning if following conditions were satisfied:

• the option stages is set to fade_in_slide_out,
• enable transparent background in colorscheme.

And it will repeat this warning hundreds of times, and create many highlight groups, looks like the second screenshot.

How to reproduce this issue:

environment:

• CentOS 7.9
• nvim 0.6.1 or nightly(I have not tried this on older version)

minimal configuration:

vim.api.nvim_command [[set termguicolors]]
vim.api.nvim_command [[packadd packer.nvim]]

local packer = require('packer')
local use = packer.use

return packer.startup(function()
    use { 'wbthomason/packer.nvim', opt = true }

    -- loading colorscheme with transparent backgroud
    use {
        'folke/tokyonight.nvim',
        opt = false,
        config = function()
            vim.g.tokyonight_italic_keywords = false
            vim.g.tokyonight_italic_comments = false
            vim.g.tokyonight_transparent = true
            vim.g.tokyonight_transparent_sidebar = true
            vim.g.tokyonight_style = 'storm'

            vim.api.nvim_command([[colorscheme tokyonight]])
        end
    }

    -- loading nvim-notify
    use {
        'rcarriga/nvim-notify',
        opt = false,
        config = function()
            local notify = require('notify')
            notify.setup {
                stages = 'fade_in_slide_out',
            }

            vim.notify = notify
        end,
    }
end)

Then:

1. save this configuration, and install packer.nvim if you haven't installed it,
2. run nvim -u init.lua +PackerSync to make configuration avaliable,
3. restart the nvim, then run :lua vim.notify('something here'), you could get what shows in screenshots.

And other stages, or non-transparent background would not reproduce this issue in my test.

[Ynoop]

the same problem too。

[rcarriga]

Added a fix to stop the spam but to prevent the warning you must set the background_colour config value to a colour.

[zhang-stephen]

Added a fix to stop the spam but to prevent the warning you must set the background_colour config value to a colour.

~I think giving a default value or an option of backgroud color is more proper, what's your opinion about it?~

the background_color was ignored by me, I will take a try and thanks