dynamic tab, tabline changes

lua/dynamic_tab.lua

@@ -0,0 +1,24 @@
+local M = {}
+
+-- Whether to switch between buffers or tabs
+local function tab_mode()
+    return vim.fn.tabpagenr("$") > 1
+end
+
+-- Whether to show windows or buffers in lualine
+local function window_mode()
+    return vim.fn.winnr("$") > 1 or tab_mode()
+end
+
+M.tab_mode = tab_mode
+M.window_mode = window_mode
+
+function M.tab()
+    vim.cmd(tab_mode() and "tabn" or "bnext")
+end
+
+function M.shift_tab()
+    vim.cmd(tab_mode() and "tabp" or "bprevious")
+end
+
+return M