feat: fix highlighting

lua/fugitive-ts/highlight.lua

@@ -119,7 +119,7 @@ function M.highlight_hunk(bufnr, ns, hunk, opts)
     return
   end
 
-  if opts.highlights.headers and hunk.header_context and hunk.header_context_col then
+  if hunk.header_context and hunk.header_context_col then
     local header_line = hunk.start_line - 1
     pcall(vim.api.nvim_buf_set_extmark, bufnr, ns, header_line, hunk.header_context_col, {
       end_col = hunk.header_context_col + #hunk.header_context,
@@ -138,15 +138,19 @@ function M.highlight_hunk(bufnr, ns, hunk, opts)
     local line_len = #line
     local prefix = line:sub(1, 1)
 
+    local is_diff_line = prefix == '+' or prefix == '-'
+    local line_hl = is_diff_line and (prefix == '+' and 'FugitiveTsAdd' or 'FugitiveTsDelete')
+      or nil
+
     if opts.conceal_prefixes then
+      local virt_hl = (opts.highlights.background and line_hl) or nil
       pcall(vim.api.nvim_buf_set_extmark, bufnr, ns, buf_line, 0, {
-        end_col = 1,
-        conceal = '',
+        virt_text = { { ' ', virt_hl } },
+        virt_text_pos = 'overlay',
       })
     end
 
-    if opts.highlights.background and (prefix == '+' or prefix == '-') then
-      local line_hl = prefix == '+' and 'FugitiveTsAdd' or 'FugitiveTsDelete'
+    if opts.highlights.background and is_diff_line then
       local extmark_opts = {
         line_hl_group = line_hl,
         priority = 198,

lua/fugitive-ts/init.lua

@@ -1,6 +1,5 @@
 ---@class fugitive-ts.Highlights
 ---@field treesitter boolean
----@field headers boolean
 ---@field background boolean
 ---@field linenr boolean
 ---@field vim boolean
@@ -37,7 +36,6 @@ local default_config = {
   conceal_prefixes = true,
   highlights = {
     treesitter = true,
-    headers = true,
     background = true,
     linenr = true,
     vim = false,
@@ -173,7 +171,6 @@ function M.setup(opts)
   if opts.highlights then
     vim.validate({
       ['highlights.treesitter'] = { opts.highlights.treesitter, 'boolean', true },
-      ['highlights.headers'] = { opts.highlights.headers, 'boolean', true },
       ['highlights.background'] = { opts.highlights.background, 'boolean', true },
       ['highlights.linenr'] = { opts.highlights.linenr, 'boolean', true },
       ['highlights.vim'] = { opts.highlights.vim, 'boolean', true },