Store each node in our choice. Fix visual node.

users/jrpotter/neovim/config/python/snippets.lua

@@ -1,13 +1,14 @@
-local c = require('luasnip').choice_node
-local d = require('luasnip').dynamic_node
-local i = require('luasnip').insert_node
-local sn = require('luasnip').snippet_node
-local t = require('luasnip').text_node
-
-local s = require('luasnip').snippet
 local fmt = require('luasnip.extras.fmt').fmt
+local ls = require('luasnip')
+local ul = require('utils.luasnip')
 
-local VISUAL = require('utils.luasnip').VISUAL
+local c = ls.choice_node
+local d = ls.dynamic_node
+local i = ls.insert_node
+local r = ls.restore_node
+local s = ls.snippet
+local sn = ls.snippet_node
+local t = ls.text_node
 
 return {
   s(
@@ -17,41 +18,36 @@ for {} in {}:
     {}]],
       {
         c(1, {
-          i(1, 'i'),
-          i(2, 'k'),
-          i(3, 'v'),
-          sn(4, { i(1, 'k'), t(', '), i(2, 'v') }),
+          i(nil, '_1'),
+          i(nil, '_2'),
+          i(nil, '_3'),
+          { i(1, '_4'), t(', '), i(2, '_5') },
         }),
-        d(2, function(args, _, old_state)
-          local default = i(nil, 'val')
-          local snip = old_state or default
-
-          if args[1][1] == 'i' then
-            snip = sn(nil, c(1, {
-              { t('range('), i(1, 'n'), t(')') },
-              default,
-            }))
-          elseif args[1][1] == 'k' then
-            snip = sn(nil, c(1, {
-              { i(1, 'dict'), t('.keys()') },
-              default,
-            }))
-          elseif args[1][1] == 'v' then
-            snip = sn(nil, c(1, {
-              { i(1, 'dict'), t('.values()') },
-              default,
-            }))
-          elseif args[1][1] == 'k, v' then
-            snip = sn(nil, c(1, {
-              { i(1, 'dict'), t('.items()') },
-              default,
-            }))
-          end
-
-          snip.old_state = snip
-          return snip
+        d(2, function(_, parent)
+          local index = ul.choice_index(parent.nodes[2])
+          return sn(
+            nil,
+            r(1, string.format('for-%d', index), ({
+              c(nil, {
+                { t('range('), i(1, 'n'), t(')') },
+                i(nil, 'val'),
+              }),
+              c(nil, {
+                { i(1, 'dict'), t('.keys()') },
+                i(nil, 'val'),
+              }),
+              c(nil, {
+                { i(1, 'dict'), t('.values()') },
+                i(nil, 'val'),
+              }),
+              c(nil, {
+                { i(1, 'dict'), t('.items()') },
+                i(nil, 'val'),
+              }),
+            })[index])
+          )
         end, { 1 }),
-        VISUAL,
+        ul.visual_node,
       }
     )
   ),

users/jrpotter/neovim/config/utils/luasnip.lua

@@ -2,16 +2,29 @@ local M = {}
 
 local luasnip = require('luasnip')
 local types = require('luasnip.util.types')
-local f = require('luasnip').function_node
+local function_node = require('luasnip').function_node
 
-M.VISUAL = f(function(_, snip)
-  local res, env = {}, snip.env
+M.visual_node = function_node(function(_, snip)
+  local env = snip.env
+  if type(env.LS_SELECT_RAW) ~= 'table' then
+    return env.LS_SELECT_RAW
+  end
+  local res = {}
   for _, ele in ipairs(env.LS_SELECT_RAW) do
     table.insert(res, ele)
   end
   return res
 end, {})
 
+function M.choice_index(choice_node)
+  for i, c in ipairs(choice_node.choices) do
+    if c == choice_node.active_choice then
+      return i
+    end
+  end
+  return 1
+end
+
 function M.setup()
   luasnip.config.setup {
     region_check_events = 'InsertEnter',