X-Git-Url: https://git.xinqibao.xyz/dotfiles.git/blobdiff_plain/1351bd7d4ef69b38593e9967de7f6a12c6cc01f1..d3e8cc5876a8246c8fe356311e6b2b9bd22363ad:/.config/nvim/lua/plugin-config/nvim-treesitter.lua?ds=sidebyside

diff --git a/.config/nvim/lua/plugin-config/nvim-treesitter.lua b/.config/nvim/lua/plugin-config/nvim-treesitter.lua
index 4d17d51..bbe2824 100644
--- a/.config/nvim/lua/plugin-config/nvim-treesitter.lua
+++ b/.config/nvim/lua/plugin-config/nvim-treesitter.lua
@@ -21,12 +21,30 @@ treesitter.install {
   'yaml',
 }
 
+local function foldlevel(lnum, exclude_start)
+  if lnum < 1 or lnum > vim.api.nvim_buf_line_count(0) then
+    return 0
+  end
+  local value = vim.treesitter.foldexpr(lnum)
+  local level = tonumber(value:match('%d+')) or 0
+  -- A '>N' starts a new fold even when adjacent folds have the same level.
+  return math.max(0, level - (exclude_start and value:sub(1, 1) == '>' and 1 or 0))
+end
+
+function _G.DotfilesFoldExpr()
+  local line = vim.v.lnum
+  -- Keep only levels spanning the previous, current, and next lines.
+  -- Default foldminlines keeps interiors of fewer than two lines visible.
+  return math.min(foldlevel(line - 1), foldlevel(line, true), foldlevel(line + 1, true))
+end
+
 local function enable(buf)
+  vim.wo[0][0].foldexpr = '0'
   if not pcall(vim.treesitter.start, buf) then
     return
   end
 
-  vim.wo[0][0].foldexpr = 'v:lua.vim.treesitter.foldexpr()'
+  vim.wo[0][0].foldexpr = 'v:lua.DotfilesFoldExpr()'
   vim.wo[0][0].foldmethod = 'expr'
 end