83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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openslides.template
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~~~~~~~~~~~~~~~~~~~
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Useful template functions for OpenSlides.
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:copyright: 2011, 2012 by OpenSlides team, see AUTHORS.
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:license: GNU GPL, see LICENSE for more details.
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"""
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from django.template import loader, Context
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from django.template.loader_tags import BlockNode, ExtendsNode
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class Tab(object):
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def __init__(self, title='', url='', permission=True, selected=False):
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self.selected = False
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self.title = title
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self.permission = permission
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self.selected = selected
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self.url = url
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## All following function are only needed to render a block from a template
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## and could be removed, if the template worked with an include-statement instead.
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## Its only used for ajax-request from the projector.
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def get_template(template):
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if isinstance(template, (tuple, list)):
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return loader.select_template(template)
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return loader.get_template(template)
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class BlockNotFound(Exception):
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pass
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def render_template_block(template, block, context):
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"""
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Renders a single block from a template. This template should have previously
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been rendered.
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"""
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return render_template_block_nodelist(template.nodelist, block, context)
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def render_template_block_nodelist(nodelist, block, context):
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for node in nodelist:
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if isinstance(node, BlockNode) and node.name == block:
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return node.render(context)
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for key in ('nodelist', 'nodelist_true', 'nodelist_false'):
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if hasattr(node, key):
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try:
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return render_template_block_nodelist(
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getattr(node, key), block, context)
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except:
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pass
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for node in nodelist:
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if isinstance(node, ExtendsNode):
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try:
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return render_template_block(
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node.get_parent(context), block, context)
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except BlockNotFound:
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pass
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raise BlockNotFound
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def render_block_to_string(template_name, block, dictionary=None,
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context_instance=None):
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"""
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Loads the given template_name and renders the given block with the given
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dictionary as context. Returns a string.
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"""
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dictionary = dictionary or {}
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t = get_template(template_name)
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if context_instance:
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context_instance.update(dictionary)
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else:
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context_instance = Context(dictionary)
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t.render(context_instance)
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return render_template_block(t, block, context_instance)
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