Added completion and some key mappings

lua/cmp_plug.lua

@@ -0,0 +1,93 @@
+local cmp = require('cmp')
+
+local t = function(str)
+    return vim.api.nvim_replace_termcodes(str, true, true, true)
+end
+
+local check_back_space = function()
+    local col = vim.fn.col(".") - 1
+    return col == 0 or vim.fn.getline("."):sub(col, col):match("%s") ~= nil
+end
+
+cmp.setup {
+
+    formatting = {
+        format = function(entry, vim_item)
+            -- fancy icons and a name of kind
+            vim_item.kind = require("lspkind").presets.default[vim_item.kind] ..
+                                " " .. vim_item.kind
+            -- set a name for each source
+            vim_item.menu = ({
+                buffer = "[Buffer]",
+                nvim_lsp = "[LSP]",
+                ultisnips = "[UltiSnips]",
+                nvim_lua = "[Lua]",
+                cmp_tabnine = "[TabNine]",
+                look = "[Look]",
+                path = "[Path]",
+                spell = "[Spell]",
+                calc = "[Calc]",
+                emoji = "[Emoji]"
+            })[entry.source.name]
+            return vim_item
+        end
+    },
+    mapping = {
+        ['<C-p>'] = cmp.mapping.select_prev_item(),
+        ['<C-n>'] = cmp.mapping.select_next_item(),
+        ['<C-d>'] = cmp.mapping.scroll_docs(-4),
+        ['<C-f>'] = cmp.mapping.scroll_docs(4),
+        ['<C-Space>'] = cmp.mapping.complete(),
+        ['<C-e>'] = cmp.mapping.close(),
+        ['<CR>'] = cmp.mapping.confirm({
+            behavior = cmp.ConfirmBehavior.Insert,
+            select = true
+        }),
+        ["<Tab>"] = cmp.mapping(function(fallback)
+            if vim.fn.pumvisible() == 1 then
+                if vim.fn["UltiSnips#CanExpandSnippet"]() == 1 or
+                    vim.fn["UltiSnips#CanJumpForwards"]() == 1 then
+                    return vim.fn.feedkeys(t(
+                                               "<C-R>=UltiSnips#ExpandSnippetOrJump()<CR>"))
+                end
+
+                vim.fn.feedkeys(t("<C-n>"), "n")
+            elseif check_back_space() then
+                vim.fn.feedkeys(t("<tab>"), "n")
+            else
+                fallback()
+            end
+        end, {"i", "s"}),
+        ["<S-Tab>"] = cmp.mapping(function(fallback)
+            if vim.fn.pumvisible() == 1 then
+                vim.fn.feedkeys(t("<C-p>"), "n")
+            else
+                fallback()
+            end
+        end, {"i", "s"})
+    },
+    snippet = {expand = function(args) vim.fn["UltiSnips#Anon"](args.body) end},
+    sources = {
+        {name = 'buffer'}, {name = 'nvim_lsp'}, {name = "ultisnips"},
+        {name = "nvim_lua"}, {name = "look"}, {name = "path"},
+        {name = 'cmp_tabnine'}, {name = "calc"}, {name = "spell"},
+        {name = "emoji"}
+    },
+    completion = {completeopt = 'menu,menuone,noinsert'}
+}
+
+-- Autopairs
+--require("nvim-autopairs.completion.cmp").setup({
+--    map_cr = true,
+--    map_complete = true,
+--    auto_select = true
+--})
+
+-- TabNine
+--local tabnine = require('cmp_tabnine.config')
+--tabnine:setup({max_lines = 1000, max_num_results = 20, sort = true})
+
+-- Database completion
+vim.api.nvim_exec([[
+autocmd FileType sql,mysql,plsql lua require('cmp').setup.buffer({ sources = {{ name = 'vim-dadbod-completion' }} })
+]], false)

lua/keymappings.lua

@@ -11,6 +11,20 @@ utils.map('v', '<leader>y', '"+y')
 utils.map('n', '<leader>Y', '"+yg_')
 utils.map('n', '<leader>y', '"+y')
 utils.map('n', '<leader>yy', '"+yy')
--- Tabs and Split
 
-utils.map('n', 'F2', ':tabnew .<CR>')
+-- Tabs
+utils.map('n', '<F2>', ':tabnew .<CR>')
+utils.map('i', '<F2>', '<Esc>:tabnew .<CR>')
+utils.map('n', '<S-Right>', 'gt')
+utils.map('n', '<S-Left>', 'gT')
+-- Split movement
+utils.map('n', '<A-Up>', ':wincmd k<CR>')
+utils.map('n', '<A-Down>', ':wincmd j<CR>')
+utils.map('n', '<A-Left>', ':wincmd h<CR>')
+utils.map('n', '<A-Right>', ':wincmd l<CR>')
+-- Open a new vertical split window with Ctrl - F2
+utils.map('n', '<C-F2>', '<Esc>:vsplit .<CR>')
+utils.map('i', '<C-F2>', '<Esc>:vsplit .<CR>')
+-- Open a new horizontal split window with Shift - F2
+utils.map('n', '<S-F2>', '<Esc>:split .<CR>')
+utils.map('i', '<S-F2>', '<Esc>:split .<CR>')

lua/plugins.lua

@@ -13,4 +13,19 @@ return require('packer').startup(function()
   use {'nvim-lua/plenary.nvim'}
   use {'lewis6991/gitsigns.nvim'}
   use {'kosayoda/nvim-lightbulb'}
+  use {
+      'kyazdani42/nvim-tree.lua',
+      requires = 'kyazdani42/nvim-web-devicons'
+  }
+  use {'terrortylor/nvim-comment'}
+  use {
+    'hrsh7th/nvim-cmp',
+    requires = {
+      'hrsh7th/cmp-buffer', 'hrsh7th/cmp-nvim-lsp',
+      'quangnguyen30192/cmp-nvim-ultisnips', 'hrsh7th/cmp-nvim-lua',
+      'octaltree/cmp-look', 'hrsh7th/cmp-path', 'hrsh7th/cmp-calc',
+      'f3fora/cmp-spell', 'hrsh7th/cmp-emoji'
+    }
+  }
+  use {'onsails/lspkind-nvim'}
 end)