nvim: Add support for using snippets

nvim/.config/nvim/after/plugin/vsnip.vim

@@ -0,0 +1,19 @@
+" Expand
+imap <expr> <C-j>   vsnip#expandable()  ? '<Plug>(vsnip-expand)'         : '<C-j>'
+smap <expr> <C-j>   vsnip#expandable()  ? '<Plug>(vsnip-expand)'         : '<C-j>'
+
+" Expand or jump
+imap <expr> <C-l>   vsnip#available(1)  ? '<Plug>(vsnip-expand-or-jump)' : '<C-l>'
+smap <expr> <C-l>   vsnip#available(1)  ? '<Plug>(vsnip-expand-or-jump)' : '<C-l>'
+
+" Select or cut text to use as $TM_SELECTED_TEXT in the next snippet.
+" See https://github.com/hrsh7th/vim-vsnip/pull/50
+nmap s <Plug>(vsnip-select-text)
+xmap s <Plug>(vsnip-select-text)
+nmap S <Plug>(vsnip-cut-text)
+xmap S <Plug>(vsnip-cut-text)
+
+" If you want to use snippet for multiple filetypes, you can `g:vsnip_filetypes` for it.
+let g:vsnip_filetypes = {}
+let g:vsnip_filetypes.javascriptreact = ['javascript']
+let g:vsnip_filetypes.typescriptreact = ['typescript']

nvim/.config/nvim/lua/lsp.lua

@@ -116,9 +116,24 @@ local on_attach = function(client, bufnr)
   }
 end
 
+function set_snippet_capabilities()
+  local capabilities = vim.lsp.protocol.make_client_capabilities()
+
+  capabilities.textDocument.completion.completionItem.snippetSupport = true
+  capabilities.textDocument.completion.completionItem.resolveSupport = {
+    properties = {
+      'documentation',
+      'detail',
+      'additionalTextEdits',
+    }
+  }
+  return capabilities
+end
+
 local servers = { 'hls', 'rust_analyzer', 'pyls', 'tsserver' }
 for _, lsp in ipairs(servers) do
   nvim_lsp[lsp].setup {
     on_attach = on_attach,
+    capabilities = set_snippet_capabilities(),
   }
 end

nvim/.config/nvim/lua/modules/completion.lua

@@ -22,7 +22,7 @@ require'compe'.setup {
     tags          = true;
     treesitter    = true;
     snippets_nvim = false;
-    vsnip         = false;
+    vsnip         = true;
   };
 }
 
@@ -45,6 +45,8 @@ end
 _G.tab_complete = function()
   if vim.fn.pumvisible() == 1 then
     return t "<C-n>"
+  elseif vim.fn.call("vsnip#available", {1}) == 1 then
+    return t "<Plug>(vsnip-expand-or-jump)"
   elseif check_back_space() then
     return t "<Tab>"
   else

nvim/.config/nvim/lua/plugins.lua

@@ -163,6 +163,11 @@ local init = function ()
     'kshenoy/vim-signature',
     'gennaro-tedesco/nvim-peekup'
   }
+  -- Snippets
+  use {
+    'rafamadriz/friendly-snippets',
+    'hrsh7th/vim-vsnip'
+  }
 end
 
 return require('packer').startup(init)