neovim-confs/lua/telescope/_extensions/themes.lua

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-- This file can be loaded as a telescope extension
local M = {}
-- Custom theme picker
-- Most of the code is copied from telescope colorscheme plugin, mostly for preview creation
M.theme_switcher = function(opts)
local pickers, finders, previewers, actions, action_state, utils, conf
if pcall(require, "telescope") then
pickers = require "telescope.pickers"
finders = require "telescope.finders"
previewers = require "telescope.previewers"
actions = require "telescope.actions"
action_state = require "telescope.actions.state"
utils = require "telescope.utils"
conf = require("telescope.config").values
else
error "Cannot find telescope!"
end
local local_utils = require "utils"
local reload_theme = local_utils.reload_theme
-- get a table of available themes
local themes = local_utils.list_themes()
if next(themes) ~= nil then
-- save this to use it for later to restore if theme not changed
local current_theme = vim.g.nvchad_theme
local new_theme = ""
local change = false
-- buffer number and name
local bufnr = vim.api.nvim_get_current_buf()
local bufname = vim.api.nvim_buf_get_name(bufnr)
local previewer
-- in case its not a normal buffer
if vim.fn.buflisted(bufnr) ~= 1 then
local deleted = false
local function del_win(win_id)
if win_id and vim.api.nvim_win_is_valid(win_id) then
utils.buf_delete(vim.api.nvim_win_get_buf(win_id))
pcall(vim.api.nvim_win_close, win_id, true)
end
end
previewer =
previewers.new {
preview_fn = function(_, entry, status)
if not deleted then
deleted = true
del_win(status.preview_win)
del_win(status.preview_border_win)
end
reload_theme(entry.value)
end
}
else
-- show current buffer content in previewer
previewer =
previewers.new_buffer_previewer {
get_buffer_by_name = function()
return bufname
end,
define_preview = function(self, entry)
if vim.loop.fs_stat(bufname) then
conf.buffer_previewer_maker(bufname, self.state.bufnr, {bufname = self.state.bufname})
else
local lines = vim.api.nvim_buf_get_lines(bufnr, 0, -1, false)
vim.api.nvim_buf_set_lines(self.state.bufnr, 0, -1, false, lines)
end
reload_theme(entry.value)
end
}
end
local picker =
pickers.new(
{
prompt_title = "Set NvChad color",
finder = finders.new_table(themes),
previewer = previewer,
sorter = conf.generic_sorter(opts),
attach_mappings = function()
actions.select_default:replace(
-- if a entry is selected, change current_theme to that
function(prompt_bufnr)
local selection = action_state.get_selected_entry()
new_theme = selection.value
change = true
actions.close(prompt_bufnr)
end
)
return true
end
}
)
-- rewrite picker.close_windows
local close_windows = picker.close_windows
picker.close_windows = function(status)
close_windows(status)
-- now apply the theme, if success, then ask for default theme change
local final_theme
if change then
final_theme = new_theme
else
final_theme = current_theme
end
if reload_theme(final_theme) then
if change then
-- ask for confirmation to set as default theme
local ans = string.lower(vim.fn.input("Set " .. new_theme .. " as default theme ? [y/N] ")) == "y"
local_utils.clear_cmdline()
if ans then
local_utils.change_theme(current_theme, final_theme)
else
-- will be used in restoring nvchad theme var
final_theme = current_theme
end
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end
else
final_theme = current_theme
end
-- set nvchad_theme global var
vim.g.nvchad_theme = final_theme
end
-- launch the telescope picker
picker:find()
else
print("No themes found in " .. themes_folder)
end
end
-- register theme swticher as themes to telescope
local present, telescope = pcall(require, "telescope")
if present then
return telescope.register_extension {
exports = {
themes = M.theme_switcher
}
}
else
error "Cannot find telescope!"
end