1 files changed, 31 insertions, 0 deletions
diff --git a/runtime/import/dist/vimhelp.vim b/runtime/import/dist/vimhelp.vim
new file mode 100644
index 0000000..d053f63
--- /dev/null
+++ b/runtime/import/dist/vimhelp.vim
@@ -0,0 +1,31 @@
+vim9script
+
+# Extra functionality for displaying Vim help .
+
+# Called when editing the doc/syntax.txt file
+export def HighlightGroups()
+  var save_cursor = getcurpos()
+  var buf: number = bufnr('%')
+
+  var start: number = search('\*highlight-groups\*', 'c')
+  var end: number = search('^======')
+  for lnum in range(start, end)
+    var word: string = getline(lnum)->matchstr('^\w\+\ze\t')
+    if word->hlexists()
+      var type = 'help-hl-' .. word
+      if prop_type_list({bufnr: buf})->index(type) != -1
+	# was called before, delete existing properties
+	prop_remove({type: type, bufnr: buf})
+	prop_type_delete(type, {bufnr: buf})
+      endif
+      prop_type_add(type, {
+	bufnr: buf,
+	highlight: word,
+	combine: false,
+	})
+      prop_add(lnum, 1, {length: word->strlen(), type: type})
+    endif
+  endfor
+
+  setpos('.', save_cursor)
+enddef