Minor tweaks to the sobol results templates.
[philo.git] / models / pages.py
index 323aeb8..2221ee4 100644 (file)
@@ -2,32 +2,79 @@
 from django.conf import settings
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes import generic
+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, extends=False):
+               self.nodes = nodes
+               self.initialized = False
+               self.contentlet_specs = set()
+               self.contentreference_specs = SortedDict()
+               self.blocks = {}
+               self.block_super = False
+               self.extends = extends
+       
+       def process(self, nodelist):
+               for node in nodelist:
+                       if self.extends:
+                               if isinstance(node, BlockNode):
+                                       self.blocks[node.name] = block = LazyContainerFinder(node.nodelist)
+                                       block.initialize()
+                                       self.blocks.update(block.blocks)
+                               continue
+                       
+                       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, 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)
        mimetype = models.CharField(max_length=255, default=getattr(settings, 'DEFAULT_CONTENT_TYPE', 'text/html'))
        code = TemplateField(secure=False, verbose_name='django template code')
        
-       @property
-       def origin(self):
-               return 'philo.models.Template: ' + self.path
-       
-       @property
-       def django_template(self):
-               return DjangoTemplate(self.code)
-       
        @property
        def containers(self):
                """
@@ -36,31 +83,54 @@ class Template(TreeModel):
                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, extends=True))
+                               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 = {}
                
-               all_nodes = nodelist_crawl(self.django_template.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
+               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)
+               
+               return contentlet_specs, contentreference_specs
        
        def __unicode__(self):
-               return self.get_path(pathsep=u' › ', field='name')
-       
-       @staticmethod
-       @fattr(is_usable=True)
-       def loader(template_name, template_dirs=None): # load_template_source
-               try:
-                       template = Template.objects.get_with_path(template_name)
-               except Template.DoesNotExist:
-                       raise TemplateDoesNotExist(template_name)
-               return (template.code, template.origin)
+               return self.name
        
        class Meta:
                app_label = 'philo'
@@ -79,33 +149,55 @@ class Page(View):
                return self._containers
        containers = property(get_containers)
        
-       def render_to_string(self, node=None, request=None, path=None, subpath=None, extra_context=None):
+       def render_to_string(self, request=None, extra_context=None):
                context = {}
                context.update(extra_context or {})
-               context.update({'page': self, 'attributes': self.attributes, 'relationships': self.relationships})
-               if node and request:
-                       context.update({'node': node, 'attributes': self.attributes_with_node(node), 'relationships': self.relationships_with_node(node)})
-                       page_about_to_render_to_string.send(sender=self, node=node, request=request, extra_context=context)
-                       string = self.template.django_template.render(RequestContext(request, context))
+               context.update({'page': self, 'attributes': self.attributes})
+               template = DjangoTemplate(self.template.code)
+               if request:
+                       context.update({'node': request.node, 'attributes': self.attributes_with_node(request.node)})
+                       page_about_to_render_to_string.send(sender=self, request=request, extra_context=context)
+                       string = template.render(RequestContext(request, context))
                else:
-                       page_about_to_render_to_string.send(sender=self, node=node, request=request, extra_context=context)
-                       string = self.template.django_template.render(Context(context))
+                       page_about_to_render_to_string.send(sender=self, request=request, extra_context=context)
+                       string = template.render(Context(context))
                page_finished_rendering_to_string.send(sender=self, string=string)
                return string
        
-       def actually_render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
-               return HttpResponse(self.render_to_string(node, request, path, subpath, extra_context), mimetype=self.template.mimetype)
+       def actually_render_to_response(self, request, extra_context=None):
+               return HttpResponse(self.render_to_string(request, extra_context), mimetype=self.template.mimetype)
        
        def __unicode__(self):
                return self.title
        
+       def clean_fields(self, exclude=None):
+               if exclude is None:
+                       exclude = []
+               
+               try:
+                       super(Page, self).clean_fields(exclude)
+               except ValidationError, e:
+                       errors = e.message_dict
+               else:
+                       errors = {}
+               
+               if 'template' not in errors and 'template' not in exclude:
+                       try:
+                               self.template.clean_fields()
+                               self.template.clean()
+                       except ValidationError, e:
+                               errors['template'] = e.messages
+               
+               if errors:
+                       raise ValidationError(errors)
+       
        class Meta:
                app_label = 'philo'
 
 
 class Contentlet(models.Model):
        page = models.ForeignKey(Page, related_name='contentlets')
-       name = models.CharField(max_length=255)
+       name = models.CharField(max_length=255, db_index=True)
        content = TemplateField()
        
        def __unicode__(self):
@@ -117,7 +209,7 @@ class Contentlet(models.Model):
 
 class ContentReference(models.Model):
        page = models.ForeignKey(Page, related_name='contentreferences')
-       name = models.CharField(max_length=255)
+       name = models.CharField(max_length=255, db_index=True)
        content_type = models.ForeignKey(ContentType, verbose_name='Content type')
        content_id = models.PositiveIntegerField(verbose_name='Content ID', blank=True, null=True)
        content = generic.GenericForeignKey('content_type', 'content_id')