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- Committer: chadnickbok
- Date: 2009-02-02 04:00:25 UTC
- Revision ID: svn-v4:2b9c9e99-6f39-0410-b283-7f802c844ae2:trunk:1189
Adding the changes from my genshi branch into trunk.
Most apps now use the Genshi templating engine, in preparation
for future changes to dispatch
Most apps now use the Genshi templating engine, in preparation
for future changes to dispatch
- files added:
- www/apps/browser/template.html
- files modified:
- www/apps/browser/__init__.py
added
removed
www/apps/tutorial/__init__.py
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from rst import rst
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import genshi
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import genshi.core
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import genshi.template
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THIS_APP = "tutorial"
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# Regex for valid identifiers (subject/worksheet names)
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self.id = id
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self.name = name
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self.assessable = assessable
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self.loc = urllib.quote(id)
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self.complete_class = ''
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self.optional_message = ''
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self.total = 0
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self.mand_done = 0
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def __repr__(self):
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return ("Worksheet(id=%s, name=%s, assessable=%s)"
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% (repr(self.id), repr(self.name), repr(self.assessable)))
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def handle(req):
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"""Handler for the Tutorial application."""
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# TODO: Take this as an argument instead (refactor dispatch)
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ctx = genshi.template.Context()
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# Set request attributes
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req.content_type = "text/html"
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req.scripts = [
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worksheet = path_segs[1]
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if subject == None:
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handle_toplevel_menu(req)
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ctx['whichmenu'] = 'toplevel'
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handle_toplevel_menu(req, ctx)
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elif worksheet == None:
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handle_subject_menu(req, subject)
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ctx['whichmenu'] = 'subjectmenu'
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handle_subject_menu(req, ctx, subject)
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else:
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handle_worksheet(req, subject, worksheet)
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ctx['whichmenu'] = 'worksheet'
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handle_worksheet(req, ctx, subject, worksheet)
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# Use Genshi to render out the template
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# TODO: Dispatch should do this instead
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loader = genshi.template.TemplateLoader(".", auto_reload=True)
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tmpl = loader.load(util.make_local_path("apps/tutorial/template.html"))
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req.write(tmpl.generate(ctx).render('html')) #'xhtml', doctype='xhtml'))
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def handle_media_path(req):
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"""
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req.content_type = type
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req.sendfile(filename)
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def handle_toplevel_menu(req):
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def handle_toplevel_menu(req, ctx):
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# This is represented as a directory. Redirect and add a slash if it is
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# missing.
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if req.uri[-1] != '/':
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req.throw_redirect(make_tutorial_path())
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req.write_html_head_foot = True
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req.write('<div id="ivle_padding">\n')
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req.write("<h1>IVLE Tutorials</h1>\n")
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req.write("""<p>Welcome to the IVLE tutorial system.
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Please select a subject from the list below to select a worksheet
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for that subject.</p>\n""")
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enrolled_subjects = req.user.subjects
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unenrolled_subjects = [subject for subject in
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ctx['enrolled_subjects'] = req.user.subjects
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ctx['unenrolled_subjects'] = [subject for subject in
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req.store.find(ivle.database.Subject)
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if subject not in enrolled_subjects]
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def print_subject(subject):
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req.write(' <li><a href="%s">%s</a></li>\n'
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% (urllib.quote(subject.code) + '/',
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cgi.escape(subject.name)))
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req.write("<h2>Subjects</h2>\n<ul>\n")
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for subject in enrolled_subjects:
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print_subject(subject)
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req.write("</ul>\n")
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if len(unenrolled_subjects) > 0:
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req.write("<h3>Other Subjects</h3>\n")
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req.write("<p>You are not currently enrolled in these subjects.\n"
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" Your marks will not be counted.</p>\n")
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req.write("<ul>\n")
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for subject in unenrolled_subjects:
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print_subject(subject)
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req.write("</ul>\n")
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req.write("</div>\n") # tutorialbody
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if subject not in ctx['enrolled_subjects']]
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def is_valid_subjname(subject):
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m = re_ident.match(subject)
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return m is not None and m.end() == len(subject)
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def handle_subject_menu(req, subject):
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def handle_subject_menu(req, ctx, subject):
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# This is represented as a directory. Redirect and add a slash if it is
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# missing.
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if req.uri[-1] != '/':
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# Parse the subject description file
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# The subject directory must have a file "subject.xml" in it,
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# or it does not exist (404 error).
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ctx['subject'] = subject
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try:
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subjectfile = open(os.path.join(ivle.conf.subjects_base, subject,
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"subject.xml"))
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"subject.xml")).read()
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except:
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req.throw_error(req.HTTP_NOT_FOUND,
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"Subject %s not found." % repr(subject))
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# Read in data about the subject
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subjectdom = minidom.parse(subjectfile)
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subjectfile.close()
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# TEMP: All of this is for a temporary XML format, which will later
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# change.
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worksheetsdom = subjectdom.documentElement
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worksheets = [] # List of string IDs
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for worksheetdom in worksheetsdom.childNodes:
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if worksheetdom.nodeType == worksheetdom.ELEMENT_NODE:
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# Get the 3 attributes for this node and construct a Worksheet
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# object.
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# (Note: assessable will default to False, unless it is explicitly
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# set to "true").
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worksheet = Worksheet(worksheetdom.getAttribute("id"),
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worksheetdom.getAttribute("name"),
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worksheetdom.getAttribute("assessable") == "true")
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worksheets.append(worksheet)
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subjectfile = genshi.Stream(list(genshi.XML(subjectfile)))
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ctx['worksheets'] = get_worksheets(subjectfile)
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# Now all the errors are out the way, we can begin writing
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req.title = "Tutorial - %s" % subject
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req.write_html_head_foot = True
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req.write('<div id="ivle_padding">\n')
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req.write("<h1>IVLE Tutorials - %s</h1>\n" % cgi.escape(subject))
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req.write('<h2>Worksheets</h2>\n<ul id="tutorial-toc">\n')
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# As we go, calculate the total score for this subject
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# (Assessable worksheets only, mandatory problems only)
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problems_done = 0
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problems_total = 0
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for worksheet_from_xml in worksheets:
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for worksheet_from_xml in ctx['worksheets']:
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worksheet = ivle.database.Worksheet.get_by_name(req.store,
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subject, worksheet_from_xml.id)
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# If worksheet is not in database yet, we'll simply not display
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# data about it yet (it should be added as soon as anyone visits
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# the worksheet itself).
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req.write(' <li><a href="%s">%s</a>'
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% (urllib.quote(worksheet_from_xml.id),
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cgi.escape(worksheet_from_xml.name)))
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if worksheet is not None:
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# If the assessable status of this worksheet has changed,
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# update the DB
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else:
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optional_message = ""
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if mand_done >= mand_total:
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complete_class = "complete"
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worksheet.complete_class = "complete"
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elif mand_done > 0:
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complete_class = "semicomplete"
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worksheet.complete_class = "semicomplete"
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else:
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complete_class = "incomplete"
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worksheet.complete_class = "incomplete"
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problems_done += mand_done
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problems_total += mand_total
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req.write('\n <ul><li class="%s">'
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'Completed %d/%d%s</li></ul>\n '
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% (complete_class, mand_done, mand_total,
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optional_message))
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req.write('</li>\n')
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req.write("</ul>\n")
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worksheet.mand_done = mand_done
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worksheet.total = mand_total
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worksheet.optional_message = optional_message
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ctx['problems_total'] = problems_total
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ctx['problems_done'] = problems_done
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if problems_total > 0:
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if problems_done >= problems_total:
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complete_class = "complete"
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ctx['complete_class'] = "complete"
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elif problems_done > 0:
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complete_class = "semicomplete"
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ctx['complete_class'] = "semicomplete"
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else:
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complete_class = "incomplete"
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problems_pct = (100 * problems_done) / problems_total # int
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req.write('<ul><li class="%s">Total exercises completed: %d/%d '
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'(%d%%)</li></ul>\n'
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% (complete_class, problems_done, problems_total,
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problems_pct))
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ctx['complete_class'] = "incomplete"
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ctx['problems_pct'] = (100 * problems_done) / problems_total
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# TODO: Put this somewhere else! What is this on about? Why 16?
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# XXX Marks calculation (should be abstracted out of here!)
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# percent / 16, rounded down, with a maximum mark of 5
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max_mark = 5
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mark = min(problems_pct / 16, max_mark)
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req.write('<p style="font-weight: bold">Worksheet mark: %d/%d'
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'</p>\n' % (mark, max_mark))
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req.write("</div>\n") # tutorialbody
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def handle_worksheet(req, subject, worksheet):
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ctx['max_mark'] = 5
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ctx['mark'] = min(problems_pct / 16, max_mark)
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def get_worksheets(subjectfile):
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'''Given a subject stream, get all the worksheets and put them in ctx'''
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worksheets = []
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for kind, data, pos in subjectfile:
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if kind is genshi.core.START:
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if data[0] == 'worksheet':
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worksheetid = ''
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worksheetname = ''
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worksheetasses = False
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for attr in data[1]:
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if attr[0] == 'id':
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worksheetid = attr[1]
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elif attr[0] == 'name':
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worksheetname = attr[1]
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elif attr[0] == 'assessable':
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worksheetasses = attr[1] == 'true'
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worksheets.append(Worksheet(worksheetid, worksheetname, \
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worksheetasses))
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return worksheets
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def handle_worksheet(req, ctx, subject, worksheet):
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# Subject and worksheet names must be valid identifiers
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if not is_valid_subjname(subject) or not is_valid_subjname(worksheet):
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req.throw_error(req.HTTP_NOT_FOUND,
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req.throw_error(req.HTTP_NOT_FOUND,
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"Worksheet file not found.")
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worksheetmtime = datetime.fromtimestamp(worksheetmtime)
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worksheetdom = minidom.parse(worksheetfile)
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worksheetfile.close()
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# TEMP: All of this is for a temporary XML format, which will later
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# change.
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worksheetdom = worksheetdom.documentElement
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if worksheetdom.tagName != "worksheet":
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req.throw_error(req.HTTP_INTERNAL_SERVER_ERROR,
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"The worksheet XML file's top-level element must be <worksheet>.")
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worksheetname = worksheetdom.getAttribute("name")
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# Now all the errors are out the way, we can begin writing
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req.title = "Tutorial - %s" % worksheetname
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worksheetfile = worksheetfile.read()
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ctx['worksheetstream'] = genshi.Stream(list(genshi.XML(worksheetfile)))
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req.write_html_head_foot = True
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req.write('<div id="ivle_padding">\n')
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req.write("<h1>IVLE Tutorials - %s</h1>\n<h2>%s</h2>\n"
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% (cgi.escape(subject), cgi.escape(worksheetname)))
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exercise_list = present_table_of_contents(req, worksheetdom, 0)
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# If the database is missing this worksheet or out of date, update its
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# details about this worksheet
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# Note: Do NOT set assessable (this is done at the subject level).
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ctx['subject'] = subject
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#TODO: Replace this with a nice way, possibly a match template
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generate_worksheet_data(ctx, req)
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update_db_worksheet(req.store, subject, worksheet, worksheetmtime,
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exercise_list)
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# Write each element
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exerciseid = 0
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for node in worksheetdom.childNodes:
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exerciseid = present_worksheet_node(req, node, exerciseid)
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req.write("</div>\n") # tutorialbody
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def present_table_of_contents(req, node, exerciseid):
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"""Given a node of a worksheet XML document, writes out a table of
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contents to the request. This recursively searches for "excercise"
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and heading elements to write out.
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When exercise elements are encountered, the DB is queried for their
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completion status, and the ball is shown of the appropriate colour.
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exerciseid is the ID to use for the first exercise.
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As a secondary feature, this records the identifier (xml filename) and
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optionality of each exercise in a list of pairs [(str, bool)], and returns
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this list. This can be used to cache this information in the database.
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"""
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exercise_list = []
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# XXX This means the DB is queried twice for each element.
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# Consider caching these results for lookup later.
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req.write("""<div id="tutorial-toc">
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<h2>Worksheet Contents</h2>
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<ul>
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""")
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for tag, xml in find_all_nodes(req, node):
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if tag == "ex":
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# Exercise node
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# Fragment ID is an accumulating exerciseid
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# (The same algorithm is employed when presenting exercises)
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fragment_id = "exercise%d" % exerciseid
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exerciseid += 1
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exercisesrc = xml.getAttribute("src")
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# Optionality: Defaults to False
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exerciseoptional = xml.getAttribute("optional") == "true"
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# Record the name and optionality for returning in the list
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exercise_list.append((exercisesrc, exerciseoptional))
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# TODO: Get proper exercise title
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title = exercisesrc
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# Get the completion status of this exercise
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exercise = ivle.database.Exercise.get_by_name(req.store,
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exercisesrc)
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complete, _ = ivle.worksheet.get_exercise_status(req.store,
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req.user, exercise)
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req.write(' <li class="%s" id="toc_li_%s"><a href="#%s">%s'
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'</a></li>\n'
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% ("complete" if complete else "incomplete",
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fragment_id, fragment_id, cgi.escape(title)))
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else:
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# Heading node
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fragment_id = getID(xml)
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title = getTextData(xml)
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req.write(' <li><a href="#%s">%s</a></li>\n'
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% (fragment_id, cgi.escape(title)))
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req.write('</ul>\n</div>\n')
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return exercise_list
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def find_all_nodes(req, node):
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"""Generator. Searches through a node and yields all headings and
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exercises. (Recursive).
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When finding a heading, yields a pair ("hx", headingnode), where "hx" is
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the element name, such as "h1", "h2", etc.
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When finding an exercise, yields a pair ("ex", exercisenode), where
398
exercisenode is the DOM node for this exercise.
399
"""
400
if node.nodeType == node.ELEMENT_NODE:
401
if node.tagName == "exercise":
402
yield "ex", node
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elif (node.tagName == "h1" or node.tagName == "h2"
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or node.tagName == "h3"):
405
yield node.tagName, node
406
else:
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# Some other element. Recurse.
408
for childnode in node.childNodes:
409
for yieldval in find_all_nodes(req, childnode):
410
yield yieldval
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def present_worksheet_node(req, node, exerciseid):
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"""Given a node of a worksheet XML document, writes it out to the
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request. This recursively searches for "exercise" elements and handles
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those specially (presenting their XML exercise spec and input box), and
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just dumps the other elements as regular HTML.
417
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exerciseid is the ID to use for the first exercise.
419
Returns the new exerciseid after all the exercises have been written
420
(since we need unique IDs for each exercise).
421
"""
422
if node.nodeType == node.ELEMENT_NODE:
423
if node.tagName == "exercise":
424
present_exercise(req, node.getAttribute("src"), exerciseid)
425
exerciseid += 1
426
else:
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# Some other element. Write out its head and foot, and recurse.
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req.write("<" + node.tagName)
429
# Attributes
430
attrs = map(lambda (k,v): '%s="%s"'
431
% (cgi.escape(k), cgi.escape(v)), node.attributes.items())
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if len(attrs) > 0:
433
req.write(" " + ' '.join(attrs))
434
req.write(">")
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for childnode in node.childNodes:
436
exerciseid = present_worksheet_node(req, childnode, exerciseid)
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req.write("</" + node.tagName + ">")
438
else:
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# No need to recurse, so just print this node's contents
440
req.write(node.toxml())
441
return exerciseid
314
ctx['exerciselist'])
315
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ctx['worksheetstream'] = add_exercises(ctx['worksheetstream'], ctx, req)
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# This generator adds in the exercises as they are required. This is returned
319
def add_exercises(stream, ctx, req):
320
"""A filter adds exercises into the stream."""
321
exid = 0
322
for kind, data, pos in stream:
323
if kind is genshi.core.START:
324
if data[0] == 'exercise':
325
new_stream = ctx['exercises'][exid]['stream']
326
exid += 1
327
for item in new_stream:
328
yield item
329
else:
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yield kind, data, pos
331
else:
332
yield kind, data, pos
333
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# This function runs through the worksheet, to get data on the exercises to
335
# build a Table of Contents, as well as fill in details in ctx
336
def generate_worksheet_data(ctx, req):
337
"""Runs through the worksheetstream, generating the exericises"""
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exid = 0
339
ctx['exercises'] = []
340
ctx['exerciselist'] = []
341
for kind, data, pos in ctx['worksheetstream']:
342
if kind is genshi.core.START:
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if data[0] == 'exercise':
344
exid += 1
345
src = ""
346
optional = False
347
for attr in data[1]:
348
if attr[0] == 'src':
349
src = attr[1]
350
if attr[0] == 'optional':
351
optional = attr[1] == 'true'
352
# Each item in toc is of type (name, complete, stream)
353
ctx['exercises'].append(present_exercise(req, src, exid))
354
ctx['exerciselist'].append((src, optional))
355
elif data[0] == 'worksheet':
356
ctx['worksheetname'] = 'bob'
357
for attr in data[1]:
358
if attr[0] == 'name':
359
ctx['worksheetname'] = attr[1]
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443
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def innerXML(elem):
444
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"""Given an element, returns its children as XML strings concatenated
448
366
s += child.toxml()
449
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return s
450
368
451
def getID(element):
452
"""Get the first ID attribute found when traversing a node and its
453
children. (This is used to make fragment links to a particular element).
454
Returns None if no ID is found.
455
"""
456
id = element.getAttribute("id")
457
if id is not None and id != '':
458
return id
459
for child in element.childNodes:
460
if child.nodeType == child.ELEMENT_NODE:
461
id = getID(child)
462
if id is not None:
463
return id
464
return None
465
466
369
def getTextData(element):
467
370
""" Get the text and cdata inside an element
468
371
Leading and trailing whitespace are stripped
478
381
479
382
return data.strip()
480
383
384
#TODO: This needs to be re-written, to stop using minidom, and get the data
385
# about the worksheet directly from the database
481
386
def present_exercise(req, exercisesrc, exerciseid):
482
387
"""Open a exercise file, and write out the exercise to the request in HTML.
483
388
exercisesrc: "src" of the exercise file. A path relative to the top-level
484
389
exercises base directory, as configured in conf.
485
390
"""
486
req.write('<div class="exercise" id="exercise%d">\n'
487
% exerciseid)
391
# Exercise-specific context is used here, as we already have all the data
392
# we need
393
curctx = genshi.template.Context()
394
curctx['filename'] = exercisesrc
395
curctx['exerciseid'] = exerciseid
396
397
# Retrieve the exercise details from the database
488
398
exercise = ivle.database.Exercise.get_by_name(req.store, exercisesrc)
399
#Open the exercise, and double-check that it exists
489
400
exercisefile = util.open_exercise_file(exercisesrc)
490
401
if exercisefile is None:
491
req.write("<p><b>Server Error</b>: "
492
+ "Exercise file could not be opened.</p>\n")
493
req.write("</div>\n")
494
return
402
req.throw_error(req.HTTP_EXPECTATION_FAILED, \
403
"Exercise file could not be opened")
495
404
496
405
# Read exercise file and present the exercise
497
406
# Note: We do not use the testing framework because it does a lot more
498
407
# work than we need. We just need to get the exercise name and a few other
499
408
# fields from the XML.
500
409
410
#TODO: Replace calls to minidom with calls to the database directly
501
411
exercisedom = minidom.parse(exercisefile)
502
412
exercisefile.close()
503
413
exercisedom = exercisedom.documentElement
504
414
if exercisedom.tagName != "exercise":
505
415
req.throw_error(req.HTTP_INTERNAL_SERVER_ERROR,
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416
"The exercise XML file's top-level element must be <exercise>.")
507
exercisename = exercisedom.getAttribute("name")
508
rows = exercisedom.getAttribute("rows")
509
if not rows:
510
rows = "12"
417
curctx['exercisename'] = exercisedom.getAttribute("name")
418
419
curctx['rows'] = exercisedom.getAttribute("rows")
420
if not curctx['rows']:
421
curctx['rows'] = "12"
511
422
# Look for some other fields we need, which are elements:
512
423
# - desc
513
424
# - partial
514
exercisedesc = None
515
exercisepartial= ""
425
curctx['exercisedesc'] = None
426
curctx['exercisepartial'] = ""
516
427
for elem in exercisedom.childNodes:
517
428
if elem.nodeType == elem.ELEMENT_NODE:
518
429
if elem.tagName == "desc":
519
exercisedesc = rst(innerXML(elem).strip())
430
curctx['exercisedesc'] = genshi.XML(rst(innerXML(elem).strip()))
520
431
if elem.tagName == "partial":
521
exercisepartial= getTextData(elem) + '\n'
522
exercisepartial_backup = exercisepartial
432
curctx['exercisepartial'] = getTextData(elem) + '\n'
433
curctx['exercisepartial_backup'] = curctx['exercisepartial']
523
434
524
435
# If the user has already saved some text for this problem, or submitted
525
436
# an attempt, then use that text instead of the supplied "partial".
526
437
saved_text = ivle.worksheet.get_exercise_stored_text(req.store,
527
438
req.user, exercise)
528
439
# Also get the number of attempts taken and whether this is complete.
529
complete, attempts = ivle.worksheet.get_exercise_status(req.store,
530
req.user, exercise)
440
complete, curctx['attempts'] = \
441
ivle.worksheet.get_exercise_status(req.store, req.user, exercise)
531
442
if saved_text is not None:
532
exercisepartial = saved_text.text
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534
# Print this exercise out to HTML
535
req.write("<p><b>Exercise:</b> %s</p>\n" % cgi.escape(exercisename))
536
if exercisedesc is not None:
537
req.write("<div>%s</div>\n" % exercisedesc)
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filename = cgi.escape(cjson.encode(exercisesrc), quote=True)
539
req.write("""<input id="input_resettext_exercise%d" type="hidden"
540
value="%s" />"""
541
% (exerciseid, urllib.quote(exercisepartial_backup)))
542
req.write("""<textarea id="textarea_exercise%d" class="exercisebox"
543
onkeypress="return catch_textbox_input("exercise%d", %s,
544
event.keyCode)"
545
onchange="set_saved_status("exercise%d", %s,
546
"Save")"
547
cols="80" rows="%s">%s</textarea>"""
548
% (exerciseid, exerciseid, filename, exerciseid, filename,
549
rows, cgi.escape(exercisepartial)))
550
req.write("""\n<div class="exercisebuttons">\n""")
551
req.write(""" <input type="button" value="Saved" disabled="disabled"
552
id="savebutton_exercise%d"
553
onclick="saveexercise("exercise%d", %s)"
554
title="Save your solution to this exercise" />\n"""
555
% (exerciseid, exerciseid, filename))
556
req.write(""" <input type="button" value="Reset"
557
id="resetbutton_exercise%d"
558
onclick="resetexercise("exercise%d", %s)"
559
title="Reload the original partial solution for this exercise" />\n"""
560
% (exerciseid, exerciseid, filename))
561
req.write(""" <input type="button" value="Run"
562
onclick="runexercise("exercise%d", %s)"
563
title="Run this program in the console" />\n"""
564
% (exerciseid, filename))
565
req.write(""" <input type="button" value="Submit"
566
id="submitbutton_exercise%d"
567
onclick="submitexercise("exercise%d", %s)"
568
title="Submit this solution for evaluation" />\n"""
569
% (exerciseid, exerciseid, filename))
570
req.write("""</div>
571
<div class="testoutput">
572
</div>
573
""")
574
# Write the "summary" - whether this problem is complete and how many
575
# attempts it has taken.
576
req.write("""<div class="problem_summary">
577
<ul><li id="summaryli_exercise%d" class="%s">
578
<b><span id="summarycomplete_exercise%d">%s</span>.</b>
579
Attempts: <span id="summaryattempts_exercise%d">%d</span>.
580
</li></ul>
581
</div>
582
""" % (exerciseid, "complete" if complete else "incomplete",
583
exerciseid, "Complete" if complete else "Incomplete",
584
exerciseid, attempts))
585
# Write the attempt history infrastructure
586
req.write("""<div class="attempthistory">
587
<p><a title="Click to view previous submissions you have made for this \
588
exercise" onclick="open_previous("exercise%d", %s)">View previous \
589
attempts</a></p>
590
<div style="display: none">
591
<h3>Previous attempts</h3>
592
<p><a title="Close the previous attempts" \
593
onclick="close_previous("exercise%d")">Close attempts</a></p>
594
<p>
595
<select title="Select an attempt's time stamp from the list">
596
<option></option>
597
</select>
598
<input type="button" value="View"
599
onclick="select_attempt("exercise%d", %s)" />
600
</p>
601
<p><textarea readonly="readonly" class="exercisebox" cols="80" rows="%s"
602
title="You submitted this code on a previous attempt">
603
</textarea>
604
</p>
605
</div>
606
</div>
607
""" % (exerciseid, filename, exerciseid, exerciseid, filename, rows))
608
req.write("</div>\n")
443
curctx['exercisepartial'] = saved_text.text
444
if complete:
445
curctx['complete'] = 'complete'
446
else:
447
curctx['complete'] = 'incomplete'
448
449
#Save the exercise details to the Table of Contents
450
451
loader = genshi.template.TemplateLoader(".", auto_reload=True)
452
tmpl = loader.load(util.make_local_path("apps/tutorial/exercise.html"))
453
ex_stream = tmpl.generate(curctx)
454
return {'name': curctx['exercisename'], 'complete': curctx['complete'], \
455
'stream': ex_stream, 'exid': exerciseid}
456
609
457
610
458
def update_db_worksheet(store, subject, worksheetname, file_mtime,
611
459
exercise_list=None, assessable=None):
Loggerhead is a web-based interface for Breezy
Version: 2.0.1