80 lines
2.7 KiB
Python
80 lines
2.7 KiB
Python
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#!/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.
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:copyright: 2011 by the 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.loader_tags import BlockNode, ExtendsNode
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from django.template import loader, Context, RequestContext, TextNode
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from django.http import HttpResponse
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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 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(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(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, context_instance=None):
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"""
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Loads the given template_name and renders the given block with the given dictionary as
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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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def direct_block_to_template(request, template, block, extra_context=None, mimetype=None, **kwargs):
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"""
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Render a given block in a given template with any extra URL parameters in the context as
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``{{ params }}``.
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"""
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if extra_context is None:
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extra_context = {}
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dictionary = {'params': kwargs}
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for key, value in extra_context.items():
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if callable(value):
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dictionary[key] = value()
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else:
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dictionary[key] = value
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c = RequestContext(request, dictionary)
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t = get_template(template)
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t.render(c)
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return HttpResponse(render_template_block(t, block, c), mimetype=mimetype)
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