added functionality to choose using a dropdown

Author: Rimkomatic

lua/switchscheme.lua

@@ -0,0 +1,9 @@
+local telescope_ui = require("switchscheme.telescope_ui")
+
+local function register()
+	vim.api.nvim_create_user_command("SwitchColorscheme", telescope_ui.colorscheme_picker, {})
+end
+
+return {
+	register = register,
+}

lua/switchscheme/commands.lua

@@ -0,0 +1,7 @@
+local M = {}
+
+M.setup = function()
+	require("switchscheme.commands").register()
+end
+
+return M

lua/switchscheme/init.lua

@@ -0,0 +1,44 @@
+local actions = require("telescope.actions")
+local action_state = require("telescope.actions.state")
+local pickers = require("telescope.pickers")
+local finders = require("telescope.finders")
+local conf = require("telescope.config").values
+
+local M = {}
+
+function M.colorscheme_picker()
+	local colors = vim.fn.getcompletion('', 'color')
+
+	pickers.new({}, {
+		prompt_title = "Select Colorscheme",
+		finder = finders.new_table({ results = colors }),
+		sorter = conf.generic_sorter({}),
+		attach_mappings = function(prompt_bufnr, map)
+			local function apply_colorscheme()
+				local selection = action_state.get_selected_entry()
+				if selection then
+					vim.cmd("colorscheme " .. selection[1])
+				end
+			end
+
+			map("i", "<CR>", function()
+				apply_colorscheme()
+				actions.close(prompt_bufnr)
+			end)
+
+			map("i", "<Down>", function()
+				actions.move_selection_next(prompt_bufnr)
+				apply_colorscheme()
+			end)
+
+			map("i", "<Up>", function()
+				actions.move_selection_previous(prompt_bufnr)
+				apply_colorscheme()
+			end)
+
+			return true
+		end,
+	}):find()
+end
+
+return M

lua/switchscheme/telescope_ui.lua

@@ -0,0 +1 @@
+require("switchscheme").setup()