Implement theme admin UI to support previewing

LEARNER-2017

openedx/core/djangoapps/plugin_api/views.py

@@ -8,6 +8,7 @@ from django.conf import settings
 from django.contrib.staticfiles.storage import staticfiles_storage
 from django.http import HttpResponse
 from django.shortcuts import render_to_response
+from edxmako.shortcuts import is_any_marketing_link_set, is_marketing_link_set, marketing_link
 from web_fragments.views import FragmentView
 
 log = logging.getLogger('plugin_api')
@@ -17,8 +18,6 @@ class EdxFragmentView(FragmentView):
     """
     The base class of all Open edX fragment views.
     """
-    USES_PATTERN_LIBRARY = True
-
     page_title = None
 
     @staticmethod
@@ -78,6 +77,44 @@ class EdxFragmentView(FragmentView):
         for js_file in self.js_dependencies():
             fragment.add_javascript_url(staticfiles_storage.url(js_file))
 
+    def create_base_standalone_context(self, request, fragment, **kwargs):
+        """
+        Creates the base context for rendering a fragment as a standalone page.
+        """
+        return {
+            'uses_pattern_library': True,
+            'disable_accordion': True,
+            'allow_iframing': True,
+            'disable_header': True,
+            'disable_footer': True,
+            'disable_window_wrap': True,
+        }
+
+    def _add_studio_standalone_context_variables(self, request, context):
+        """
+        Adds Studio-specific context variables for fragment standalone pages.
+
+        Note: this is meant to be a temporary hack to ensure that Studio
+        receives the context variables that are expected by some of its
+        shared templates. Ideally these templates shouldn't depend upon
+        this data being provided but should instead import the functionality
+        it needs.
+        """
+        context.update({
+            'request': request,
+            'settings': settings,
+            'EDX_ROOT_URL': settings.EDX_ROOT_URL,
+            'marketing_link': marketing_link,
+            'is_any_marketing_link_set': is_any_marketing_link_set,
+            'is_marketing_link_set': is_marketing_link_set,
+        })
+
+    def standalone_page_title(self, request, fragment, **kwargs):
+        """
+        Returns the page title for the standalone page, or None if there is no title.
+        """
+        return None
+
     def render_standalone_response(self, request, fragment, **kwargs):
         """
         Renders a standalone page for the specified fragment.
@@ -86,14 +123,18 @@ class EdxFragmentView(FragmentView):
         """
         if fragment is None:
             return HttpResponse(status=204)
-        context = {
-            'uses-pattern-library': self.USES_PATTERN_LIBRARY,
+        context = self.create_base_standalone_context(request, fragment, **kwargs)
+        self._add_studio_standalone_context_variables(request, context)
+        context.update({
             'settings': settings,
             'fragment': fragment,
-            'disable_accordion': True,
-            'allow_iframing': True,
-            'disable_header': True,
-            'disable_footer': True,
-            'disable_window_wrap': True,
-        }
-        return render_to_response(settings.STANDALONE_FRAGMENT_VIEW_TEMPLATE, context)
+            'page_title': self.standalone_page_title(request, fragment, **kwargs),
+        })
+        if context.get('uses_pattern_library', False):
+            template = 'fragments/standalone-page-v2.html'
+        elif context.get('uses_bootstrap', False):
+            template = 'fragments/standalone-page-bootstrap.html'
+        else:
+            template = 'fragments/standalone-page-v1.html'
+
+        return render_to_response(template, context)