From adcdd78525d92cc3d95285dc7d336035a79d628a Mon Sep 17 00:00:00 2001
From: punkfairie <marley@punkfairie.net>
Date: Fri, 29 Nov 2024 18:08:02 -0800
Subject: [PATCH] feat: bufferline.nvim

---
 nix/neovim-overlay.nix                  |  1 +
 nvim/lua/icons.lua                      |  8 +++
 nvim/lua/plugins/ui/bufferline-nvim.lua | 79 +++++++++++++++++++++++++
 nvim/lua/plugins/ui/init.lua            |  1 +
 4 files changed, 89 insertions(+)
 create mode 100644 nvim/lua/icons.lua
 create mode 100644 nvim/lua/plugins/ui/bufferline-nvim.lua

diff --git a/nix/neovim-overlay.nix b/nix/neovim-overlay.nix
index c73cb35..0e0f77d 100644
--- a/nix/neovim-overlay.nix
+++ b/nix/neovim-overlay.nix
@@ -35,6 +35,7 @@ with final.pkgs.lib; let
 
     # UI
     mini-icons
+    bufferline-nvim
   ];
 
   extraPackages = with pkgs; [
diff --git a/nvim/lua/icons.lua b/nvim/lua/icons.lua
new file mode 100644
index 0000000..5c614c9
--- /dev/null
+++ b/nvim/lua/icons.lua
@@ -0,0 +1,8 @@
+return {
+  diagnostics = {
+    Error = ' ',
+    Warn = ' ',
+    Hint = ' ',
+    Info = ' ',
+  },
+}
diff --git a/nvim/lua/plugins/ui/bufferline-nvim.lua b/nvim/lua/plugins/ui/bufferline-nvim.lua
new file mode 100644
index 0000000..4872654
--- /dev/null
+++ b/nvim/lua/plugins/ui/bufferline-nvim.lua
@@ -0,0 +1,79 @@
+return {
+  'bufferline.nvim',
+  event = 'DeferredUIEnter',
+  keys = {
+    { '<LEADER>bp', '<CMD>BufferLineTogglePin<CR>', desc = 'Toggle pin' },
+    {
+      '<LEADER>bP',
+      '<CMD>BufferLineGroupClose ungrouped<CR>',
+      desc = 'Delete non-pinned buffers',
+    },
+    {
+      '<LEADER>br',
+      '<CMD>BufferLineCloseRight<CR>',
+      desc = 'Delete buffers to the right',
+    },
+    {
+      '<LEADER>bl',
+      '<CMD>BufferLineCloseLeft<CR>',
+      desc = 'Delete buffers to the left',
+    },
+    { '<S-H>', '<CMD>BufferLineCyclePrev<CR>', desc = 'Previous buffer' },
+    { '<S-L>', '<CMD>BufferLineCycleNext<CR>', desc = 'Next buffer' },
+    { '[b', '<CMD>BufferLineCyclePrev<CR>', desc = 'Previous buffer' },
+    { ']b', '<CMD>BufferLineCycleNext<CR>', desc = 'Next buffer' },
+    { '[B', '<CMD>BufferLineMovePrev<CR>', desc = 'Move buffer left' },
+    { ']B', '<CMD>BufferLineMoveNext<CR>', desc = 'Move buffer right' },
+  },
+  before = function()
+    require('lz.n').trigger_load('mini.icons')
+  end,
+  after = function()
+    require('bufferline').setup({
+      options = {
+        always_show_bufferline = true,
+
+        close_command = function(n)
+          Snacks.bufdelete(n)
+        end,
+        right_mouse_command = function(n)
+          Snacks.bufdelete(n)
+        end,
+
+        diagnostics = 'nvim_lsp',
+        diagnostics_indicator = function(_, _, diag)
+          local icons = require('icons').diagnostics
+          local ret = (diag.error and icons.Error .. diag.error .. ' ' or '')
+            .. (diag.warning and icons.Warn .. diag.warning or '')
+
+          return vim.trim(ret)
+        end,
+
+        offsets = {
+          {
+            filetype = 'neo-tree',
+            text = 'Explorer',
+            highlight = 'Directory',
+            text_align = 'center',
+          },
+        },
+
+        get_element_icon = function(elem)
+          local icon, hl, _ =
+            require('mini.icons').get('filetype', elem.filetype)
+
+          return icon, hl
+        end,
+      },
+    })
+
+    vim.api.nvim_create_autocmd({ 'BufAdd', 'BufDelete' }, {
+      desc = 'Fix bufferline when restoring a session',
+      callback = function()
+        vim.schedule(function()
+          pcall(nvim_bufferline)
+        end)
+      end,
+    })
+  end,
+}
diff --git a/nvim/lua/plugins/ui/init.lua b/nvim/lua/plugins/ui/init.lua
index 062e643..6104e65 100644
--- a/nvim/lua/plugins/ui/init.lua
+++ b/nvim/lua/plugins/ui/init.lua
@@ -1,5 +1,6 @@
 local req = require('lib.marleyvim').localRequire('plugins.ui')
 
 return {
+  req('bufferline-nvim'),
   req('mini-icons'),
 }