make parseDOM() tag rule behave the same way style rule does

[benmandr]

The title might be a bit "bad". But examples explain what I have in mind perfectly:

I am trying to make bold extension work not only with style attribute, but also with class one.

If I pass a text with font weight style (ex. <h1 class="h2" style="font-weight:bold" >Text</h1>), I get the following result:

Parent node attributes are preserved (I have a custom Heading extension that preserves style and class attributes), but when I pass this <h1 class="h-1" >Text</h1>, and the TAG rule gets triggered, this is what I get:

All my parent node styles/classes get reset to defaults. What can I do to avoid this behavior ?