from django.core.exceptions import ValidationError
from django.db import models
from django.http import HttpResponse
-from django.template import TemplateDoesNotExist, Context, RequestContext, Template as DjangoTemplate, add_to_builtins as register_templatetags
+from django.template import TemplateDoesNotExist, Context, RequestContext, Template as DjangoTemplate, add_to_builtins as register_templatetags, TextNode, VariableNode
+from django.template.loader_tags import BlockNode, ExtendsNode, BlockContext
+from django.utils.datastructures import SortedDict
from philo.models.base import TreeModel, register_value_model
from philo.models.fields import TemplateField
from philo.models.nodes import View
from philo.templatetags.containers import ContainerNode
-from philo.utils import fattr, nodelist_crawl
+from philo.utils import fattr
from philo.validators import LOADED_TEMPLATE_ATTR
from philo.signals import page_about_to_render_to_string, page_finished_rendering_to_string
+class LazyContainerFinder(object):
+ def __init__(self, nodes):
+ self.nodes = nodes
+ self.initialized = False
+ self.contentlet_specs = set()
+ self.contentreference_specs = SortedDict()
+ self.blocks = {}
+ self.block_super = False
+
+ def process(self, nodelist):
+ for node in nodelist:
+ if isinstance(node, ContainerNode):
+ if not node.references:
+ self.contentlet_specs.add(node.name)
+ else:
+ if node.name not in self.contentreference_specs.keys():
+ self.contentreference_specs[node.name] = node.references
+ continue
+
+ if isinstance(node, BlockNode):
+ self.blocks[node.name] = block = LazyContainerFinder(node.nodelist)
+ block.initialize()
+ self.blocks.update(block.blocks)
+ continue
+
+ if isinstance(node, ExtendsNode):
+ continue
+
+ if isinstance(node, VariableNode):
+ if node.filter_expression.var.lookups == (u'block', u'super'):
+ self.block_super = True
+
+ if hasattr(node, 'child_nodelists'):
+ for nodelist_name in node.child_nodelists:
+ if hasattr(node, nodelist_name):
+ nodelist = getattr(node, nodelist_name)
+ self.process(nodelist)
+
+ # LOADED_TEMPLATE_ATTR contains the name of an attribute philo uses to declare a
+ # node as rendering an additional template. Philo monkeypatches the attribute onto
+ # the relevant default nodes and declares it on any native nodes.
+ if hasattr(node, LOADED_TEMPLATE_ATTR):
+ loaded_template = getattr(node, LOADED_TEMPLATE_ATTR)
+ if loaded_template:
+ nodelist = loaded_template.nodelist
+ self.process(nodelist)
+
+ def initialize(self):
+ if not self.initialized:
+ self.process(self.nodes)
+ self.initialized = True
+
+
class Template(TreeModel):
name = models.CharField(max_length=255)
documentation = models.TextField(null=True, blank=True)
This will break if there is a recursive extends or includes in the template code.
Due to the use of an empty Context, any extends or include tags with dynamic arguments probably won't work.
"""
- def process_node(node, nodes):
- if isinstance(node, ContainerNode):
- nodes.append(node)
+ template = DjangoTemplate(self.code)
+
+ def build_extension_tree(nodelist):
+ nodelists = []
+ extends = None
+ for node in nodelist:
+ if not isinstance(node, TextNode):
+ if isinstance(node, ExtendsNode):
+ extends = node
+ break
+
+ if extends:
+ if extends.nodelist:
+ nodelists.append(LazyContainerFinder(extends.nodelist))
+ loaded_template = getattr(extends, LOADED_TEMPLATE_ATTR)
+ nodelists.extend(build_extension_tree(loaded_template.nodelist))
+ else:
+ # Base case: root.
+ nodelists.append(LazyContainerFinder(nodelist))
+ return nodelists
+
+ # Build a tree of the templates we're using, placing the root template first.
+ levels = build_extension_tree(template.nodelist)[::-1]
+
+ contentlet_specs = set()
+ contentreference_specs = SortedDict()
+ blocks = {}
+
+ for level in levels:
+ level.initialize()
+ contentlet_specs |= level.contentlet_specs
+ contentreference_specs.update(level.contentreference_specs)
+ for name, block in level.blocks.items():
+ if block.block_super:
+ blocks.setdefault(name, []).append(block)
+ else:
+ blocks[name] = [block]
+
+ for block_list in blocks.values():
+ for block in block_list:
+ block.initialize()
+ contentlet_specs |= block.contentlet_specs
+ contentreference_specs.update(block.contentreference_specs)
- all_nodes = nodelist_crawl(DjangoTemplate(self.code).nodelist, process_node)
- contentlet_node_names = set([node.name for node in all_nodes if not node.references])
- contentreference_node_names = []
- contentreference_node_specs = []
- for node in all_nodes:
- if node.references and node.name not in contentreference_node_names:
- contentreference_node_specs.append((node.name, node.references))
- contentreference_node_names.append(node.name)
- return contentlet_node_names, contentreference_node_specs
+ return contentlet_specs, contentreference_specs
def __unicode__(self):
return self.get_path(pathsep=u' › ', field='name')
git.ithinksw.org / philo.git / blobdiff