Merge pull request #14239 from edx/arizzitano/courseware-sequence-title

generate sequence-specific titles server-side

common/lib/xmodule/xmodule/js/src/sequence/display.js

@@ -57,8 +57,8 @@
             this.ajaxUrl = this.el.data('ajax-url');
             this.nextUrl = this.el.data('next-url');
             this.prevUrl = this.el.data('prev-url');
-            this.base_page_title = ' | ' + document.title;
             this.keydownHandler($(element).find('#sequence-list .tab'));
+            this.base_page_title = ($('title').data('base-title') || '').trim();
             this.bind();
             this.render(parseInt(this.el.data('position'), 10));
         }
@@ -136,10 +136,15 @@
 
         Sequence.prototype.updatePageTitle = function() {
             // update the page title to include the current section
-            var positionLink = this.link_for(this.position);
+            var currentSectionTitle,
+                positionLink = this.link_for(this.position);
 
             if (positionLink && positionLink.data('page-title')) {
-                document.title = positionLink.data('page-title') + this.base_page_title;
+                currentSectionTitle = positionLink.data('page-title') + ' | ' + this.base_page_title;
+
+                if (currentSectionTitle !== document.title) {
+                    document.title = currentSectionTitle;
+                }
             }
         };
 

lms/djangoapps/courseware/tests/test_views.py

@@ -1824,6 +1824,7 @@ class ViewCheckerBlock(XBlock):
     """
     has_children = True
     state = String(scope=Scope.user_state)
+    position = 0
 
     def student_view(self, context):  # pylint: disable=unused-argument
         """

lms/djangoapps/courseware/views/index.py

@@ -388,6 +388,8 @@ class CoursewareIndex(View):
             'bookmarks_api_url': reverse('bookmarks'),
             'language_preference': self._get_language_preference(),
             'disable_optimizely': True,
+            'section_title': None,
+            'sequence_title': None
         }
         table_of_contents = toc_for_course(
             self.effective_user,
@@ -437,6 +439,11 @@ class CoursewareIndex(View):
                 table_of_contents['next_of_active_section'],
             )
             courseware_context['fragment'] = self.section.render(STUDENT_VIEW, section_context)
+            if self.section.position and self.section.has_children:
+                display_items = self.section.get_display_items()
+                if display_items:
+                    courseware_context['sequence_title'] = display_items[self.section.position - 1] \
+                        .display_name_with_default
 
         return courseware_context
 

lms/templates/courseware/courseware.html

@@ -19,13 +19,11 @@ from openedx.core.djangolib.js_utils import js_escaped_string
 
 <%block name="bodyclass">view-in-course view-courseware courseware ${course.css_class or ''}</%block>
 
-<%block name="title"><title>
-    % if section_title:
-${static.get_page_title_breadcrumbs(section_title, course_name())}
-    % else:
-${static.get_page_title_breadcrumbs(course_name())}
-    %endif
-</title></%block>
+<%block name="title">
+<title data-base-title="${static.get_page_title_breadcrumbs(section_title, course_name())}">
+  ${static.get_page_title_breadcrumbs(sequence_title, section_title, course_name())}
+</title>
+</%block>
 
 <%block name="header_extras">
 

openedx/core/djangoapps/site_configuration/helpers.py

@@ -211,6 +211,7 @@ def page_title_breadcrumbs(*crumbs, **kwargs):
     """
     platform_name = get_value('platform_name', settings.PLATFORM_NAME)
     separator = kwargs.get("separator", " | ")
+    crumbs = [c for c in crumbs if c is not None]
     if crumbs:
         return u'{}{}{}'.format(separator.join(crumbs), separator, platform_name)
     else: