write own lightweight tabufline | remove bufferline

lua/ui/statusline.lua

@@ -50,7 +50,7 @@ M.fileInfo = function()
       local devicons_present, devicons = pcall(require, "nvim-web-devicons")
 
       if devicons_present then
-         local ft_icon = devicons.get_icon(filename, fn.expand "%:e")
+         local ft_icon = devicons.get_icon(filename)
          icon = (ft_icon ~= nil and " " .. ft_icon) or ""
       end
 

lua/ui/tabline.lua

@@ -0,0 +1,126 @@
+require("base46").load_highlight "tbline"
+local api = vim.api
+
+-- btn click functions
+vim.cmd "function! TbGoToBuf(bufnr,b,c,d) \n execute 'b'..a:bufnr \n endfunction"
+
+vim.cmd [[
+   function! TbKillBuf(bufnr,b,c,d) 
+        call luaeval('require("core.utils").close_buffer(_A)', a:bufnr)
+  endfunction]]
+
+vim.cmd "function! TbNewTab(a,b,c,d) \n tabnew \n endfunction"
+vim.cmd "function! TbGotoTab(tabnr,b,c,d) \n execute a:tabnr ..'tabnext' \n endfunction"
+vim.cmd "function! TbTabClose(a,b,c,d) \n lua require('core.utils').tabuflineCloseTab() \n endfunction"
+vim.cmd "function! TbToggle_theme(a,b,c,d) \n lua require('base46').toggle_theme() \n endfunction"
+vim.cmd "function! TbToggleTabs(a,b,c,d) \n let g:TbTabsToggled = !g:TbTabsToggled | redrawtabline \n endfunction"
+
+local devicons_present, devicons = pcall(require, "nvim-web-devicons")
+local fn = vim.fn
+local new_cmd = api.nvim_create_user_command
+
+new_cmd("Tbufnext", function()
+   require("core.utils").tabuflineNext()
+end, {})
+
+new_cmd("Tbufprev", function()
+   require("core.utils").tabuflinePrev()
+end, {})
+
+new_cmd("Tbufclose", function()
+   require("core.utils").close_buffer()
+end, {})
+
+local function new_hl(group1, group2)
+   local fg = fn.synIDattr(fn.synIDtrans(fn.hlID(group1)), "fg#")
+   local bg = fn.synIDattr(fn.synIDtrans(fn.hlID(group2)), "bg#")
+   api.nvim_set_hl(0, "Tbline" .. group1 .. group2, { fg = fg, bg = bg })
+   return "%#" .. "Tbline" .. group1 .. group2 .. "#"
+end
+
+local function Offset()
+   for _, win in pairs(api.nvim_tabpage_list_wins(0)) do
+      if vim.bo[api.nvim_win_get_buf(win)].ft == "NvimTree" then
+         return "%#NvimTreeNormal#" .. string.rep(" ", api.nvim_win_get_width(win) + 1)
+      end
+   end
+end
+
+local function add_fileInfo(name, bufnr)
+   if devicons_present then
+      local icon, icon_hl = devicons.get_icon(name, string.match(name, "%a+$"))
+
+      if not icon then
+         icon, icon_hl = devicons.get_icon "default_icon"
+      end
+
+      local fileInfo = " " .. icon .. " " .. name .. " " -- initial value
+      local pad = (24 - #fileInfo) / 2
+
+      icon = (
+         api.nvim_get_current_buf() == bufnr and new_hl(icon_hl, "TbLineBufOn") .. " " .. icon
+         or new_hl(icon_hl, "TbLineBufOff") .. " " .. icon
+      )
+
+      name = (#name > 20 and string.sub(name, 1, 15) .. "...") or name
+      name = (api.nvim_get_current_buf() == bufnr and "%#TbLineBufOn# " .. name .. " ")
+         or ("%#TbLineBufOff# " .. name .. " ")
+
+      return string.rep(" ", pad) .. icon .. name .. string.rep(" ", pad - 1)
+   end
+end
+
+local function bufferlist()
+   local buffers = ""
+
+   for _, nr in ipairs(vim.t.bufs or {}) do -- buf = bufnr
+      local name = (#api.nvim_buf_get_name(nr) ~= 0) and fn.fnamemodify(api.nvim_buf_get_name(nr), ":t") or " No Name "
+      local close_btn = "%" .. nr .. "@TbKillBuf@ %X"
+      name = "%" .. nr .. "@TbGoToBuf@" .. add_fileInfo(name, nr) .. "%X"
+
+      -- color close btn for focused / hidden  buffers
+      if nr == api.nvim_get_current_buf() then
+         close_btn = (vim.bo[0].modified and "%#TbLineBufOnModified# ") or ("%#TbLineBufOnClose#" .. close_btn)
+         name = "%#TbLineBufOn#" .. name .. close_btn
+      else
+         close_btn = (vim.bo[nr].modified and "%#TbBufLineBufOffModified# ") or ("%#TbLineBufOffClose#" .. close_btn)
+         name = "%#TbLineBufOff#" .. name .. close_btn
+      end
+
+      buffers = buffers .. name
+   end
+
+   return buffers .. "%#TblineFill#" .. "%=" -- buffers + empty space
+end
+
+vim.g.TbTabsToggled = 0
+
+local function tablist()
+   local result, number_of_tabs = "", fn.tabpagenr "$"
+
+   if number_of_tabs > 1 then
+      for i = 1, number_of_tabs, 1 do
+         local tab_hl = ((i == fn.tabpagenr()) and "%#TbLineTabOn# ") or "%#TbLineTabOff# "
+         result = result .. ("%" .. i .. "@TbGotoTab@" .. tab_hl .. i .. " ")
+         result = (i == fn.tabpagenr() and result .. "%#TbLineTabCloseBtn#" .. "%@TbTabClose@ %X") or result
+      end
+
+      local new_tabtn = "%#TblineTabNewBtn#" .. "%@TbNewTab@  %X"
+      local tabstoggleBtn = "%@TbToggleTabs@ %#TBTabTitle# TABS %X"
+
+      result = (vim.g.TbTabsToggled == 1 and tabstoggleBtn:gsub("()", { [36] = " " }))
+         or new_tabtn .. tabstoggleBtn .. result
+
+      return result
+   end
+end
+
+local function buttons()
+   return "%@TbToggle_theme@%#TbLineThemeToggleBtn#" .. vim.g.toggle_theme_icon .. "%X"
+end
+
+return {
+   run = function()
+      return (Offset() or "") .. bufferlist() .. (tablist() or "") .. buttons()
+   end,
+}