X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/91ff82666d936433802979e3051a363ae131ce13..e073ab5f4ec5bec683a8984196b0c8cbc09a344e:/models/pages.py diff --git a/models/pages.py b/models/pages.py index 1600768..b7b43c5 100644 --- a/models/pages.py +++ b/models/pages.py @@ -7,15 +7,69 @@ 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, 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) @@ -30,60 +84,54 @@ 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, contentlet_specs, contentreference_specs, contentreference_names, block_context=None): - if isinstance(node, ContainerNode): - if not node.references: - if node.name not in contentlet_specs: - contentlet_specs.append(node.name) - else: - if node.name not in contentreference_names: - contentreference_specs.append((node.name, node.references)) - contentreference_names.add(node.name) - if isinstance(node, ExtendsNode) and block_context is not None: - block_context.add_blocks(node.blocks) - parent = getattr(node, LOADED_TEMPLATE_ATTR) - for node in parent.nodelist: - if not isinstance(node, TextNode): - if not isinstance(node, ExtendsNode): - blocks = dict([(n.name, n) for n in parent.nodelist.get_nodes_by_type(BlockNode)]) - block_context.add_blocks(blocks) - break - - if hasattr(node, 'child_nodelists') and not isinstance(node, BlockNode): - for nodelist_name in node.child_nodelists: - if hasattr(node, nodelist_name): - nodelist_crawl(getattr(node, nodelist_name), process_node, contentlet_specs, contentreference_specs, contentreference_names, block_context) + 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 - # 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_crawl(loaded_template.nodelist, process_node, contentlet_specs, contentreference_specs, contentreference_names, block_context) + 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 - contentreference_names = set() - contentlet_specs = [] - contentreference_specs = [] - block_context = BlockContext() - nodelist_crawl(DjangoTemplate(self.code).nodelist, process_node, contentlet_specs, contentreference_specs, contentreference_names, block_context) + # Build a tree of the templates we're using, placing the root template first. + levels = build_extension_tree(template.nodelist)[::-1] - def process_block_node(node, contentlet_specs, contentreference_specs, contentreference_names, block_super): - if isinstance(node, VariableNode) and node.filter_expression.var.lookups == (u'block', u'super'): - block_super.append(node) - process_node(node, contentlet_specs, contentreference_specs, contentreference_names, block_context=None) + contentlet_specs = set() + contentreference_specs = SortedDict() + blocks = {} - for block_list in block_context.blocks.values(): - for block in block_list[::-1]: - block_super = [] - nodelist_crawl(block.nodelist, process_block_node, contentlet_specs, contentreference_specs, contentreference_names, block_super) - if not block_super: - break + 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') + return self.name class Meta: app_label = 'philo'