From 7faa540b3817cc4653267c70aa71c6b5460899a6 Mon Sep 17 00:00:00 2001
From: Justine Smithies <justine@smithies.me.uk>
Date: Sun, 7 Jan 2024 20:55:53 +0000
Subject: Add Super-Tab mapping to nvim cmp

---
 .config/nvim/lua/pluginsconfig/nvim-cmp.lua | 33 +++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

(limited to '.config/nvim')

diff --git a/.config/nvim/lua/pluginsconfig/nvim-cmp.lua b/.config/nvim/lua/pluginsconfig/nvim-cmp.lua
index 4252705..e7b0ea9 100644
--- a/.config/nvim/lua/pluginsconfig/nvim-cmp.lua
+++ b/.config/nvim/lua/pluginsconfig/nvim-cmp.lua
@@ -1,10 +1,16 @@
-  -- Setup nvim-cmp.
-  local present, cmp = pcall(require, 'cmp')
+-- Setup nvim-cmp.
+local present, cmp = pcall(require, 'cmp')
 
 if not present then
   return
 end
 
+local has_words_before = function()
+  unpack = unpack or table.unpack
+  local line, col = unpack(vim.api.nvim_win_get_cursor(0))
+  return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
+end
+
   cmp.setup({
     snippet = {
       -- REQUIRED - you must specify a snippet engine
@@ -35,6 +41,29 @@ end
       ['<C-Space>'] = cmp.mapping.complete(),
       ['<C-e>'] = cmp.mapping.abort(),
       ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+      ["<Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_next_item()
+      -- You could replace the expand_or_jumpable() calls with expand_or_locally_jumpable() 
+      -- that way you will only jump inside the snippet region
+      -- elseif luasnip.expand_or_jumpable() then
+      --   luasnip.expand_or_jump()
+      elseif has_words_before() then
+        cmp.complete()
+      else
+        fallback()
+      end
+    end, { "i", "s" }),
+
+    ["<S-Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_prev_item()
+      elseif luasnip.jumpable(-1) then
+        luasnip.jump(-1)
+      else
+        fallback()
+      end
+    end, { "i", "s" }),
     }),
     sources = cmp.config.sources({
       { name = 'nvim_lsp' },
-- 
cgit v1.2.3