Fix handling checkboxes with regex magic chars

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed finding backlinks with URL-encoded path references.
 - Fixed using templates with frontmatter when `disable_frontmatter` is set to true. Previously the frontmatter would be removed when the template was inserted, now it will be kept unchanged.
 - Add compatibility for NVIM 0.11
+- Fixed handling check boxes with characters that have a special meaning in regular expressions (e.g. "?").
 
 ## [v3.7.12](https://github.com/epwalsh/obsidian.nvim/releases/tag/v3.7.12) - 2024-05-02
 

lua/obsidian/ui.lua

@@ -189,7 +189,7 @@ end
 local function get_line_check_extmarks(marks, line, lnum, ui_opts)
   for char, opts in pairs(ui_opts.checkboxes) do
     -- TODO: escape `char` if needed
-    if string.match(line, "^%s*- %[" .. char .. "%]") then
+    if string.match(line, "^%s*- %[" .. util.escape_magic_characters(char) .. "%]") then
       local indent = util.count_indent(line)
       marks[#marks + 1] = ExtMark.new(
         nil,

lua/obsidian/util.lua

@@ -511,7 +511,7 @@ util.toggle_checkbox = function(opts, line_num)
     end
   else
     for i, check_char in enumerate(checkboxes) do
-      if string.match(line, "^%s*- %[" .. check_char .. "%].*") then
+      if string.match(line, "^%s*- %[" .. util.escape_magic_characters(check_char) .. "%].*") then
         if i == #checkboxes then
           i = 0
         end