vim: Better snippets (and split completion file)

hm/vim/completion_pre.lua

@@ -0,0 +1,32 @@
+-- https://github.com/hrsh7th/nvim-cmp/wiki/Example-mappings#luasnip
+
+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
+
+local luasnip = require("luasnip")
+local cmp = require("cmp")
+
+local nvim_cmp_tab = function(fallback)
+    if cmp.visible() then
+        cmp.select_next_item()
+    elseif luasnip.expand_or_jumpable() then
+        luasnip.expand_or_jump()
+    elseif has_words_before() then
+        cmp.complete()
+    else
+        fallback()
+    end
+end
+
+local nvim_cmp_stab = function(fallback)
+    if cmp.visible() then
+        cmp.select_prev_item()
+    elseif luasnip.jumpable(-1) then
+        luasnip.jump(-1)
+    else
+        fallback()
+    end
+end