with the default sunburst theme, you only get body.section-chinese (for the top folder slot / chinese / calendar) and, in addition, some other classes on the body tag:
- presentation document template (for the currently used template or presentation)
- portaltype-document (for the content type of the current context)
If this is not enough to properly configure the calendar, you need to either
a) enter your own view @@ plone (for your skin layer), which adds the functions that you previously used in the getSectionFromURL method, or
b) still use the old getSectionFromURL script and adapt main_template accordingly
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