nvim/lua/plugins/telescope.lua

-- Function for image preview with image.nvim 
-- Still experimental and freeze:
-- https://github.com/3rd/image.nvim/issues/183
--
-- function telescope_image_preview()
-- 	local supported_images = { "svg", "png", "jpg", "jpeg", "gif", "webp", "avif" }
-- 	local from_entry = require("telescope.from_entry")
-- 	local Path = require("plenary.path")
-- 	local conf = require("telescope.config").values
-- 	local Previewers = require("telescope.previewers")
--
-- 	local previewers = require("telescope.previewers")
-- 	local image_api = require("image")
--
-- 	local is_image_preview = false
-- 	local image = nil
-- 	local last_file_path = ""
--
-- 	local is_supported_image = function(filepath)
-- 		local split_path = vim.split(filepath:lower(), ".", { plain = true })
-- 		local extension = split_path[#split_path]
-- 		return vim.tbl_contains(supported_images, extension)
-- 	end
--
-- 	local delete_image = function()
-- 		if not image then
-- 			return
-- 		end
--
-- 		image:clear()
--
-- 		is_image_preview = false
-- 	end
--
-- 	local create_image = function(filepath, winid, bufnr)
-- 		image = image_api.hijack_buffer(filepath, winid, bufnr)
--
-- 		if not image then
-- 			return
-- 		end
--
-- 		vim.schedule(function()
-- 			image:render()
-- 		end)
--
-- 		is_image_preview = true
-- 	end
--
-- 	local function defaulter(f, default_opts)
-- 		default_opts = default_opts or {}
-- 		return {
-- 			new = function(opts)
-- 				if conf.preview == false and not opts.preview then
-- 					return false
-- 				end
-- 				opts.preview = type(opts.preview) ~= "table" and {} or opts.preview
-- 				if type(conf.preview) == "table" then
-- 					for k, v in pairs(conf.preview) do
-- 						opts.preview[k] = vim.F.if_nil(opts.preview[k], v)
-- 					end
-- 				end
-- 				return f(opts)
-- 			end,
-- 			__call = function()
-- 				local ok, err = pcall(f(default_opts))
-- 				if not ok then
-- 					error(debug.traceback(err))
-- 				end
-- 			end,
-- 		}
-- 	end
--
-- 	-- NOTE: Add teardown to cat previewer to clear image when close Telescope
-- 	local file_previewer = defaulter(function(opts)
-- 		opts = opts or {}
-- 		local cwd = opts.cwd or vim.loop.cwd()
-- 		return Previewers.new_buffer_previewer({
-- 			title = "File Preview",
-- 			dyn_title = function(_, entry)
-- 				return Path:new(from_entry.path(entry, true)):normalize(cwd)
-- 			end,
--
-- 			get_buffer_by_name = function(_, entry)
-- 				return from_entry.path(entry, true)
-- 			end,
--
-- 			define_preview = function(self, entry, _)
-- 				local p = from_entry.path(entry, true)
-- 				if p == nil or p == "" then
-- 					return
-- 				end
--
-- 				conf.buffer_previewer_maker(p, self.state.bufnr, {
-- 					bufname = self.state.bufname,
-- 					winid = self.state.winid,
-- 					preview = opts.preview,
-- 				})
-- 			end,
--
-- 			teardown = function(_)
-- 				if is_image_preview then
-- 					delete_image()
-- 				end
-- 			end,
-- 		})
-- 	end, {})
--
-- 	local buffer_previewer_maker = function(filepath, bufnr, opts)
-- 		-- NOTE: Clear image when preview other file
-- 		if is_image_preview and last_file_path ~= filepath then
-- 			delete_image()
-- 		end
--
-- 		last_file_path = filepath
--
-- 		if is_supported_image(filepath) then
-- 			create_image(filepath, opts.winid, bufnr)
-- 		else
-- 			previewers.buffer_previewer_maker(filepath, bufnr, opts)
-- 		end
-- 	end
--
-- 	return { buffer_previewer_maker = buffer_previewer_maker, file_previewer = file_previewer.new }
-- end
--
-- local image_preview = telescope_image_preview()

return {
	{
		"nvim-telescope/telescope.nvim",
		tag = "0.1.8",
		dependencies = { "nvim-lua/plenary.nvim" },
		config = function()
			require("telescope").setup({
				defaults = {
					-- file_previewer = image_preview.file_previewer,
					-- buffer_previewer_maker = image_preview.buffer_previewer_maker,

					-- Default configuration for telescope goes here:
					-- config_key = value,
					mappings = {
						i = {
							-- map actions.which_key to <C-h> (default: <C-/>)
							-- actions.which_key shows the mappings for your picker,
							-- e.g. git_{create, delete, ...}_branch for the git_branches picker
							["<C-h>"] = "which_key",
						},
					},
				},
				pickers = {
					-- Default configuration for builtin pickers goes here:
					-- picker_name = {
					--   picker_config_key = value,
					--   ...
					-- }
					-- Now the picker_config_key will be applied every time you call this
					-- builtin picker
				},
				extensions = {
          -- file_browser = { hijack_netrw = true },
					-- Your extension configuration goes here:
					-- extension_name = {
					--   extension_config_key = value,
					-- }
					-- please take a look at the readme of the extension you want to configure
				},
			})
		end,
	},
	{
		"nvim-telescope/telescope-ui-select.nvim",
		config = function()
			-- This is your opts table
			require("telescope").setup({
				extensions = {
					["ui-select"] = {
						require("telescope.themes").get_dropdown({
							-- even more opts
						}),

						-- pseudo code / specification for writing custom displays, like the one
						-- for "codeactions"
						-- specific_opts = {
						--   [kind] = {
						--     make_indexed = function(items) -> indexed_items, width,
						--     make_displayer = function(widths) -> displayer
						--     make_display = function(displayer) -> function(e)
						--     make_ordinal = function(e) -> string
						--   },
						--   -- for example to disable the custom builtin "codeactions" display
						--      do the following
						--   codeactions = false,
						-- }
					},
				},
			})
			-- To get ui-select loaded and working with telescope, you need to call
			-- load_extension, somewhere after setup function:
			require("telescope").load_extension("ui-select")
		end,
	},
}