316 lines
12 KiB
Python
316 lines
12 KiB
Python
from __future__ import unicode_literals
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import inspect
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import logging
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import urllib
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import urlparse
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from django.core.urlresolvers import NoReverseMatch, resolve, reverse
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from django.template import VariableDoesNotExist, Variable
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from django.utils.encoding import smart_str, smart_unicode
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from django.utils.http import urlencode, urlquote
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from django.utils.text import unescape_string_literal
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from django.utils.translation import ugettext_lazy as _
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logger = logging.getLogger(__name__)
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class ResolvedLink(object):
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active = False
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url = '#'
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text = _('Unnamed link')
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class Link(object):
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bound_links = {}
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@classmethod
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def bind_links(cls, sources, links, menu_name=None, position=0):
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"""
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Associate a link to a model, a view, or an url
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"""
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cls.bound_links.setdefault(menu_name, {})
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try:
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for source in sources:
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cls.bound_links[menu_name].setdefault(source, {'links': []})
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try:
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cls.bound_links[menu_name][source]['links'].extend(links)
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except TypeError:
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# Try to see if links is a single link
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cls.bound_links[menu_name][source]['links'].append(links)
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except TypeError:
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raise Exception('The bind_links source argument must be a list, even for single element sources.')
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def __init__(self, text, view, klass=None, args=None, icon=None,
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permissions=None, condition=None, conditional_disable=None,
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description=None, dont_mark_active=False, keep_query=False,
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conditional_highlight=None):
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self.text = text
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self.view = view
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self.args = args or {}
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#self.kwargs = kwargs or {}
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self.icon = icon
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self.permissions = permissions or []
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self.condition = condition
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self.conditional_disable = conditional_disable
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self.description = description
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self.dont_mark_active = dont_mark_active
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self.klass = klass
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self.keep_query = keep_query
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self.conditional_highlight = conditional_highlight # Used by dynamic sources
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def resolve(self, context, request=None, current_path=None, current_view=None, resolved_object=None):
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# Don't calculate these if passed in an argument
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request = request or Variable('request').resolve(context)
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current_path = current_path or request.META['PATH_INFO']
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if not current_view:
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match = resolve(current_path)
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if match.namespace:
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current_view = '{}:{}'.format(match.namespace, match.url_name)
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else:
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current_view = match.url_name
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# Preserve unicode data in URL query
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previous_path = smart_unicode(urllib.unquote_plus(smart_str(request.get_full_path()) or smart_str(request.META.get('HTTP_REFERER', reverse('main:home')))))
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query_string = urlparse.urlparse(previous_path).query
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parsed_query_string = urlparse.parse_qs(query_string)
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logger.debug('condition: %s', self.condition)
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if resolved_object:
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context['resolved_object'] = resolved_object
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# Check to see if link has conditional display
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if self.condition:
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self.condition_result = self.condition(context)
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else:
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self.condition_result = True
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logger.debug('self.condition_result: %s', self.condition_result)
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if self.condition_result:
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resolved_link = ResolvedLink()
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resolved_link.text = self.text
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resolved_link.icon = self.icon
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resolved_link.permissions = self.permissions
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resolved_link.condition_result = self.condition_result
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try:
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#args, kwargs = resolve_arguments(context, self.get('args', {}))
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args, kwargs = Link.resolve_arguments(context, self.args)
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except VariableDoesNotExist:
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args = []
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kwargs = {}
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if self.view:
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if not self.dont_mark_active:
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resolved_link.active = self.view == current_view
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try:
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if kwargs:
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resolved_link.url = reverse(self.view, kwargs=kwargs)
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else:
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resolved_link.url = reverse(self.view, args=args)
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if self.keep_query:
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resolved_link.url = '%s?%s' % (urlquote(resolved_link.url), urlencode(parsed_query_string, doseq=True))
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except NoReverseMatch, exc:
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resolved_link.url = '#'
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resolved_link.error = exc
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elif self.url:
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if not self.dont_mark_active:
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resolved_link.url.active = self.url == current_path
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if kwargs:
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resolved_link.url = self.url % kwargs
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else:
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resolved_link.url = self.url % args
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if self.keep_query:
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resolved_link.url = '%s?%s' % (urlquote(resolved_link.url), urlencode(parsed_query_string, doseq=True))
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else:
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resolved_link.active = False
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if self.conditional_highlight:
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resolved_link.active = self.conditional_highlight(context)
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if self.conditional_disable:
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resolved_link.disabled = self.conditional_disable(context)
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else:
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resolved_link.disabled = False
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# TODO: add tree base main menu support to auto activate parent links
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return resolved_link
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@classmethod
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def get_context_navigation_links(cls, context, menu_name=None, links_dict=None):
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request = Variable('request').resolve(context)
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current_path = request.META['PATH_INFO']
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match = resolve(current_path)
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if match.namespace:
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current_view = '{}:{}'.format(match.namespace, match.url_name)
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else:
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current_view = match.url_name
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context_links = {}
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if not links_dict:
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links_dict = Link.bound_links
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# Don't fudge with the original global dictionary
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# TODO: fix this
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links_dict = links_dict.copy()
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# Dynamic sources
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# TODO: improve name to 'injected...'
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# TODO: remove, only used by staging files
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try:
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# Check for an inject temporary navigation dictionary
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temp_navigation_links = Variable('extra_navigation_links').resolve(context)
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if temp_navigation_links:
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links_dict.update(temp_navigation_links)
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except VariableDoesNotExist:
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pass
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# Get view only links
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try:
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view_links = links_dict[menu_name][current_view]['links']
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except KeyError:
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pass
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else:
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context_links[None] = []
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for link in view_links:
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context_links[None].append(link.resolve(context, request=request, current_path=current_path, current_view=current_view))
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# Get object links
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for resolved_object in Link.get_navigation_objects(context).keys():
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for source, data in links_dict.get(menu_name, {}).items():
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if inspect.isclass(source) and isinstance(resolved_object, source) or Combined(obj=type(resolved_object), view=current_view) == source:
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context_links[resolved_object] = []
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for link in data['links']:
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context_links[resolved_object].append(link.resolve(context, request=request, current_path=current_path, current_view=current_view, resolved_object=resolved_object))
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break # No need for further content object match testing
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return context_links
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@classmethod
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def get_navigation_objects(cls, context):
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objects = {}
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try:
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object_list = Variable('navigation_object_list').resolve(context)
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except VariableDoesNotExist:
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pass
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else:
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logger.debug('found: navigation_object_list')
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for obj in object_list:
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objects.setdefault(obj, {})
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# Legacy
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try:
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indirect_reference_list = Variable('navigation_object_list_ref').resolve(context)
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except VariableDoesNotExist:
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pass
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else:
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logger.debug('found: navigation_object_list_ref')
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for indirect_reference in indirect_reference_list:
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try:
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resolved_object = Variable(indirect_reference['object']).resolve(context)
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except VariableDoesNotExist:
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resolved_object = None
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else:
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objects.setdefault(resolved_object, {})
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objects[resolved_object]['label'] = indirect_reference.get('object_name')
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try:
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resolved_object = Variable('object').resolve(context)
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except VariableDoesNotExist:
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pass
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else:
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logger.debug('found single object')
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try:
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object_label = Variable('object_name').resolve(context)
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except VariableDoesNotExist:
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object_label = None
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finally:
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objects.setdefault(resolved_object, {})
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objects[resolved_object]['label'] = object_label
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return objects
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@classmethod
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def resolve_template_variable(cls, context, name):
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try:
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return unescape_string_literal(name)
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except ValueError:
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#return Variable(name).resolve(context)
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#TODO: Research if should return always as a str
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return str(Variable(name).resolve(context))
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except TypeError:
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return name
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@classmethod
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def resolve_arguments(cls, context, src_args):
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args = []
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kwargs = {}
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if isinstance(src_args, list):
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for i in src_args:
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try:
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# Try to execute as a function
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val = i(context=context)
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except TypeError:
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val = Link.resolve_template_variable(context, i)
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if val:
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args.append(val)
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else:
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args.append(val)
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elif isinstance(src_args, dict):
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for key, value in src_args.items():
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try:
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# Try to execute as a function
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val = i(context=context)
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except TypeError:
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val = Link.resolve_template_variable(context, value)
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if val:
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kwargs[key] = val
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else:
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kwargs[key] = val
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else:
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val = Link.resolve_template_variable(context, src_args)
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if val:
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args.append(val)
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return args, kwargs
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class ModelListColumn(object):
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_model_list_columns = {}
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@classmethod
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def get_model(cls, model):
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return cls._model_list_columns.get(model)
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def __init__(self, model, name, attribute):
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self.__class__._model_list_columns.setdefault(model, [])
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self.__class__._model_list_columns[model].extend(columns)
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class Combined(object):
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"""
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Class that binds a link to a combination of an object and a view.
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This is used to show links relating to a specific object type but only
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in certain views.
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Used by the PageDocument class to show rotatio and zoom link only on
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certain views
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"""
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def __init__(self, obj, view):
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self.obj = obj
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self.view = view
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def __hash__(self):
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return hash((self.obj, self.view))
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def __eq__(self, other):
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return hash(self) == hash(other)
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