Read-only users get "Details" instead of "Edit" button, remove "Save" option

cms/djangoapps/contentstore/views/item.py

@@ -234,6 +234,7 @@ def xblock_view_handler(request, usage_key_string, view_name):
 
         elif view_name in (PREVIEW_VIEWS + container_views):
             is_pages_view = view_name == STUDENT_VIEW   # Only the "Pages" view uses student view in Studio
+            can_edit = has_studio_write_access(request.user, usage_key.course_key)
 
             # Determine the items to be shown as reorderable. Note that the view
             # 'reorderable_container_child_preview' is only rendered for xblocks that
@@ -266,6 +267,7 @@ def xblock_view_handler(request, usage_key_string, view_name):
             context = {
                 'is_pages_view': is_pages_view,     # This setting disables the recursive wrapping of xblocks
                 'is_unit_page': is_unit(xblock),
+                'can_edit': can_edit,
                 'root_xblock': xblock if (view_name == 'container_preview') else None,
                 'reorderable_items': reorderable_items,
                 'paging': paging,

cms/djangoapps/contentstore/views/preview.py

@@ -226,6 +226,7 @@ def _studio_wrap_xblock(xblock, view, frag, context, display_name_only=False):
             'content': frag.content,
             'is_root': is_root,
             'is_reorderable': is_reorderable,
+            'can_edit': context.get('can_edit', True),
         }
         html = render_to_string('studio_xblock_wrapper.html', template_context)
         frag = wrap_fragment(frag, html)