(renderer) subtle bugfix

For text changes, we want to fire for any tag that the cursor is
adjacent to.

lua/u/logger.lua

@@ -1,9 +1,9 @@
 local M = {}
 
+local LOG_ROOT = vim.fs.joinpath(vim.fn.stdpath 'cache', 'u.log')
+
 --- @params name string
-function M.file_for_name(name)
-  return vim.fs.joinpath(vim.fn.stdpath 'cache', 'u.log', name .. '.log.jsonl')
-end
+function M.file_for_name(name) return vim.fs.joinpath(LOG_ROOT, name .. '.log.jsonl') end
 
 --------------------------------------------------------------------------------
 -- Logger class
@@ -11,7 +11,6 @@ end
 
 --- @class u.Logger
 --- @field name string
---- @field private fd number
 local Logger = {}
 Logger.__index = Logger
 M.Logger = Logger
@@ -20,10 +19,7 @@ M.Logger = Logger
 function Logger.new(name)
   local file_path = M.file_for_name(name)
   vim.fn.mkdir(vim.fs.dirname(file_path), 'p')
-  local self = setmetatable({
-    name = name,
-    fd = (vim.uv or vim.loop).fs_open(file_path, 'a', tonumber('644', 8)),
-  }, Logger)
+  local self = setmetatable({ name = name }, Logger)
   return self
 end
 
@@ -32,10 +28,12 @@ end
 function Logger:write(level, ...)
   local data = { ... }
   if #data == 1 then data = data[1] end
-  (vim.uv or vim.loop).fs_write(
-    self.fd,
-    vim.json.encode { ts = os.date(), level = level, data = data } .. '\n'
+  local f = assert(io.open(M.file_for_name(self.name), 'a'), 'could not open file')
+  assert(
+    f:write(vim.json.encode { ts = os.date(), level = level, data = data } .. '\n'),
+    'could not write to file'
   )
+  f:close()
 end
 
 function Logger:trace(...) self:write('INFO', ...) end
@@ -64,6 +62,12 @@ function M.setup()
     vim.cmd.terminal('tail -f "' .. log_file_path .. '"')
     vim.cmd.startinsert()
   end, { nargs = '*' })
+
+  vim.api.nvim_create_user_command(
+    'Logroot',
+    function() vim.api.nvim_echo({ { LOG_ROOT } }, false, {}) end,
+    {}
+  )
 end
 
 return M

lua/u/renderer.lua

@@ -361,7 +361,7 @@ function Renderer:_on_text_changed() -- {{{
   --- @type integer, integer
   local l, c = unpack(vim.api.nvim_win_get_cursor(0))
   l = l - 1 -- make it actually 0-based
-  local pos_infos = self:get_tags_at { l, c }
+  local pos_infos = self:get_tags_at({ l, c }, 'i')
   for _, pos_info in ipairs(pos_infos) do
     local extmark_inf = pos_info.extmark
     local tag = pos_info.tag