Updates to gilbert. Reorganizing imports and removing support for python < 2.5.4.

[philo.git] / models / pages.py

diff --git a/models/pages.py b/models/pages.py
index 7476f18..86db88f 100644 (file)
--- a/models/pages.py
+++ b/models/pages.py
@@ -1,34 +1,79 @@
 # encoding: utf-8
 # encoding: utf-8

-from django.db import models
+from django.conf import settings

 from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes import generic
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes import generic

-from django.conf import settings
-from django.template import add_to_builtins as register_templatetags
-from django.template import Template as DjangoTemplate
-from django.template import TemplateDoesNotExist
-from django.template import Context, RequestContext
-from django.template.loader import get_template
-from django.template.loader_tags import ExtendsNode, ConstantIncludeNode, IncludeNode
+from django.core.exceptions import ValidationError
+from django.db import models

 from django.http import HttpResponse
 from django.http import HttpResponse

+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.base import TreeModel, register_value_model

+from philo.models.fields import TemplateField

 from philo.models.nodes import View
 from philo.models.nodes import View

-from philo.utils import fattr

 from philo.templatetags.containers import ContainerNode
 from philo.templatetags.containers import ContainerNode

+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)
 
 
 class Template(TreeModel):
        name = models.CharField(max_length=255)
        documentation = models.TextField(null=True, blank=True)

-       mimetype = models.CharField(max_length=255, null=True, blank=True, help_text='Default: %s' % settings.DEFAULT_CONTENT_TYPE)
-       code = models.TextField(verbose_name='django template code')
-       
-       @property
-       def origin(self):
-               return 'philo.models.Template: ' + self.path
-       
-       @property
-       def django_template(self):
-               return DjangoTemplate(self.code)
+       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 containers(self):
        
        @property
        def containers(self):


@@ -38,54 +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.
                """
                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 container_nodes(template):
-                       def nodelist_container_nodes(nodelist):
-                               nodes = []
-                               for node in nodelist:
-                                       try:
-                                               if hasattr(node, 'child_nodelists'):
-                                                       for nodelist_name in node.child_nodelists:
-                                                               if hasattr(node, nodelist_name):
-                                                                       nodes.extend(nodelist_container_nodes(getattr(node, nodelist_name)))
-                                               if isinstance(node, ContainerNode):
-                                                       nodes.append(node)
-                                               elif isinstance(node, ExtendsNode):
-                                                       extended_template = node.get_parent(Context())
-                                                       if extended_template:
-                                                               nodes.extend(container_nodes(extended_template))
-                                               elif isinstance(node, ConstantIncludeNode):
-                                                       included_template = node.template
-                                                       if included_template:
-                                                               nodes.extend(container_nodes(included_template))
-                                               elif isinstance(node, IncludeNode):
-                                                       included_template = get_template(node.template_name.resolve(Context()))
-                                                       if included_template:
-                                                               nodes.extend(container_nodes(included_template))
-                                       except:
-                                               raise # fail for this node
-                               return nodes
-                       return nodelist_container_nodes(template.nodelist)
-               all_nodes = container_nodes(self.django_template)
-               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
+               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 = {}
+               
+               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):
        
        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'
        
        class Meta:
                app_label = 'philo'


@@ -98,30 +143,59 @@ class Page(View):
        template = models.ForeignKey(Template, related_name='pages')
        title = models.CharField(max_length=255)
        
        template = models.ForeignKey(Template, related_name='pages')
        title = models.CharField(max_length=255)
        

-       def render_to_string(self, node=None, request=None, path=None, subpath=None, extra_context=None):
+       def get_containers(self):
+               if not hasattr(self, '_containers'):
+                       self._containers = self.template.containers
+               return self._containers
+       containers = property(get_containers)
+       
+       def render_to_string(self, request=None, extra_context=None):

                context = {}
                context.update(extra_context or {})
                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)})
-                       return self.template.django_template.render(RequestContext(request, context))
-               return self.template.django_template.render(Context(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, request=request, extra_context=context)
+                       string = template.render(Context(context))
+               page_finished_rendering_to_string.send(sender=self, string=string)
+               return string

        
        

-       def 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 __unicode__(self):
                return self.title
        

+       def clean_fields(self, exclude=None):
+               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')
        class Meta:
                app_label = 'philo'
 
 
 class Contentlet(models.Model):
        page = models.ForeignKey(Page, related_name='contentlets')

-       name = models.CharField(max_length=255)
-       content = models.TextField()
-       dynamic = models.BooleanField(default=False)
+       name = models.CharField(max_length=255, db_index=True)
+       content = TemplateField()

        
        def __unicode__(self):
                return self.name
        
        def __unicode__(self):
                return self.name


@@ -132,7 +206,7 @@ class Contentlet(models.Model):
 
 class ContentReference(models.Model):
        page = models.ForeignKey(Page, related_name='contentreferences')
 
 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')
        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')