make thumb size in folder contents listing adjustable/supressable

  (uses site control panel settings: thumb_size_tables ...)
  plone/Products.CMFPlone#1734

CHANGES.rst

@@ -9,6 +9,9 @@ Breaking changes:
 - *add item here*
 
 New features:
+- make thumbsize in folder contents listing adjustable/supressable 
+  (uses site control panel settings: thumb_size_tables ...)
+  https://github.com/plone/Products.CMFPlone/issues/1734 [fgrcon]
 
 - *add item here*
 

plone/app/content/browser/contents/__init__.py

@@ -7,8 +7,10 @@
 from plone.app.content.utils import json_dumps
 from plone.app.content.utils import json_loads
 from plone.protect.postonly import check as checkpost
+from plone.registry.interfaces import IRegistry
 from plone.uuid.interfaces import IUUID
 from Products.CMFCore.utils import getToolByName
+from Products.CMFPlone.interfaces.controlpanel import ISiteSchema
 from Products.CMFPlone import PloneMessageFactory as _
 from Products.CMFPlone import utils
 from Products.Five import BrowserView
@@ -242,6 +244,16 @@ def get_columns(self):
                 columns[column] = translate(_(column), context=self.request)
         return columns
 
+    def get_thumbSize(self):
+        registry = getUtility(IRegistry)
+        settings = registry.forInterface(
+            ISiteSchema, prefix="plone", check=False)
+        if settings.no_thumbs_tables:
+            # thumbs to be supressed
+            return 'none'
+        thumb_size_table = settings.thumb_size_table
+        return thumb_size_table
+
     def get_options(self):
         site = get_top_site_from_url(self.context, self.request)
         base_url = site.absolute_url()
@@ -281,6 +293,7 @@ def get_options(self):
                 'initialFolder': IUUID(self.context, None),
                 'useTus': TUS_ENABLED
             },
+            'thumbSize' : self.get_thumbSize(),
         }
         return options