116 lines
3.6 KiB
Python
116 lines
3.6 KiB
Python
import json
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from lxml import etree
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from mitxmako.shortcuts import render_to_string
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from x_module import XModule
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# HACK: This shouldn't be hard-coded to two types
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# OBSOLETE: This obsoletes 'type'
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class_priority = ['video', 'problem']
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class Module(XModule):
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''' Layout module which lays out content in a temporal sequence
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'''
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id_attribute = 'id'
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def get_state(self):
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return json.dumps({ 'position':self.position })
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@classmethod
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def get_xml_tags(c):
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return ["sequential", 'tab']
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def get_html(self):
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self.render()
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return self.content
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def get_init_js(self):
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self.render()
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return self.init_js
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def get_destroy_js(self):
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self.render()
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return self.destroy_js
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def handle_ajax(self, dispatch, get):
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if dispatch=='goto_position':
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self.position = int(get['position'])
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return json.dumps({'success':True})
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raise self.system.exception404
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def render(self):
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if self.rendered:
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return
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def j(m):
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''' jsonify contents so it can be embedded in a js array
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We also need to split </script> tags so they don't break
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mid-string'''
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if 'init_js' not in m: m['init_js']=""
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if 'type' not in m: m['init_js']=""
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content=json.dumps(m['content'])
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content=content.replace('</script>', '<"+"/script>')
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return {'content':content,
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"destroy_js":m['destroy_js'],
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'init_js':m['init_js'],
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'type': m['type']}
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## Returns a set of all types of all sub-children
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child_classes = [set([i.tag for i in e.iter()]) for e in self.xmltree]
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self.titles = json.dumps(["\n".join([i.get("name").strip() for i in e.iter() if i.get("name") != None]) \
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for e in self.xmltree])
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self.contents = [j(self.render_function(e)) \
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for e in self.xmltree]
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print self.titles
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for (content, element_class) in zip(self.contents, child_classes):
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new_class = 'other'
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for c in class_priority:
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if c in element_class:
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new_class = c
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content['type'] = new_class
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js=""
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params={'items':self.contents,
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'id':self.item_id,
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'position': self.position,
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'titles':self.titles}
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# TODO/BUG: Destroy JavaScript should only be called for the active view
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# This calls it for all the views
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#
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# To fix this, we'd probably want to have some way of assigning unique
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# IDs to sequences.
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destroy_js="".join([e['destroy_js'] for e in self.contents if 'destroy_js' in e])
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if self.xmltree.tag == 'sequential':
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self.init_js=js+render_to_string('seq_module.js',params)
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self.destroy_js=destroy_js
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self.content=render_to_string('seq_module.html',params)
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if self.xmltree.tag == 'tab':
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params['id'] = 'tab'
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self.init_js=js+render_to_string('tab_module.js',params)
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self.destroy_js=destroy_js
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self.content=render_to_string('tab_module.html',params)
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self.rendered = True
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def __init__(self, system, xml, item_id, state=None):
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XModule.__init__(self, system, xml, item_id, state)
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self.xmltree = etree.fromstring(xml)
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self.position = 1
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if state != None:
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state = json.loads(state)
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if 'position' in state: self.position = int(state['position'])
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self.rendered = False
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