From a30f1a1e99b789dda61037b7ae5edd0eb99db8ef Mon Sep 17 00:00:00 2001
From: Piotr Mitros <pmitros@mit.edu>
Date: Tue, 27 Dec 2011 21:08:06 -0500
Subject: [PATCH] Explain works

---
 courseware/capa_module.py | 16 +++++++++++++++-
 courseware/html_module.py | 14 ++++++++++++--
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/courseware/capa_module.py b/courseware/capa_module.py
index 5120b07878..0948518bb7 100644
--- a/courseware/capa_module.py
+++ b/courseware/capa_module.py
@@ -80,6 +80,16 @@ class LoncapaModule(XModule):
         if self.max_attempts != None: 
             attempts_str = " ({a}/{m})".format(a=self.attempts, m=self.max_attempts)
 
+        # Check if explanation is available, and if so, give a link
+        explain=""
+        if self.lcp.done and self.explain_available=='attempted':
+            explain=self.explanation
+        if self.closed() and self.explain_available=='closed':
+            explain=self.explanation
+        
+        if len(explain) == 0:
+            explain = False
+
         html=render_to_string('problem.html', 
                               {'problem' : content, 
                                'id' : self.filename, 
@@ -88,7 +98,8 @@ class LoncapaModule(XModule):
                                'save_button' : save_button,
                                'answer_available' : self.answer_available(),
                                'ajax_url' : self.ajax_url,
-                               'attempts': attempts_str
+                               'attempts': attempts_str, 
+                               'explain': explain
                                })
         if encapsulate:
             html = '<div id="main_{id}">'.format(id=self.item_id)+html+"</div>"
@@ -104,6 +115,9 @@ class LoncapaModule(XModule):
 
         dom2 = etree.fromstring(xml)
 
+        self.explanation=content_parser.item(dom2.xpath('/problem/@explain'))
+        self.explain_available=content_parser.item(dom2.xpath('/problem/@explain_available'))
+
         self.due_date=content_parser.item(dom2.xpath('/problem/@due'))
         if len(self.due_date)>0:
             self.due_date=dateutil.parser.parse(self.due_date)
diff --git a/courseware/html_module.py b/courseware/html_module.py
index b2f0c0a002..ceadb2fd8b 100644
--- a/courseware/html_module.py
+++ b/courseware/html_module.py
@@ -17,8 +17,18 @@ class HtmlModule(XModule):
         return "html"
         
     def get_html(self):
-        return render_to_string(self.item_id, {'id': self.item_id})
+        if self.filename!=None:
+            return render_to_string(self.filename, {'id': self.item_id})
+        else: 
+            xmltree=etree.fromstring(self.xml)
+            textlist=[xmltree.text]+[etree.tostring(i) for i in xmltree]+[xmltree.tail]
+            textlist=[i for i in textlist if type(i)==str]
+            return "".join(textlist)
 
     def __init__(self, xml, item_id, ajax_url=None, track_url=None, state=None):
         XModule.__init__(self, xml, item_id, ajax_url, track_url, state)
-        print xml
+        xmltree=etree.fromstring(xml)
+        self.filename = None
+        filename_l=xmltree.xpath("/html/@filename")
+        if len(filename_l)>0:
+            self.filename=str(filename_l[0])