nvim: auto undo-break

dot_config/nvim/lua/core/keymaps.lua.tmpl

@@ -20,3 +20,5 @@ vim.keymap.set('n', '<C-u>', '<C-u>zz')
 vim.keymap.set('n', '<C-d>', '<C-d>zz')
 vim.keymap.set('n', '<PageUp>', '<C-u>zz')
 vim.keymap.set('n', '<PageDown>', '<C-d>zz')
+
+vim.keymap.set("i", "<CR>", "<C-g>u<CR>")

dot_config/nvim/lua/core/options.lua.tmpl

@@ -72,3 +72,18 @@ vim.opt.foldmethod = "indent"
 vim.opt.foldenable = false
 vim.opt.foldlevel = 99
 vim.g.markdown_folding = 1 -- enable markdown folding
+
+
+-- auto undo break (insert mode)
+local function map_undobreak(chars)
+  local term = vim.api.nvim_replace_termcodes("<C-g>u", true, false, true)
+  for _, ch in ipairs(chars) do
+    vim.keymap.set("i", ch, function() return term .. ch end,
+      { expr = true, silent = true, desc = "undobreak before '" .. ch .. "'" })
+  end
+end
+
+map_undobreak({
+  ".", ",", "!", "?", ";", ":", ")", "]", "}", ">",  -- 英文系
+  "。", "、", "！", "？", "；", "：", "）", "］", "」", "』", "＞"  -- 和文系
+})