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# -*- coding: utf-8 -*-
# Copyright (c) 2006, 2008-2010, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014 Brett Cannon <brett@python.org>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015-2018 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2016 Ashley Whetter <ashley@awhetter.co.uk>
# Copyright (c) 2017 Łukasz Rogalski <rogalski.91@gmail.com>
# Copyright (c) 2018 ssolanki <sushobhitsolanki@gmail.com>
# Copyright (c) 2018 Sushobhit <31987769+sushobhit27@users.noreply.github.com>
# Copyright (c) 2018 Ville Skyttä <ville.skytta@upcloud.com>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
"""handle diagram generation options for class diagram or default diagrams
"""
import astroid
from pylint.pyreverse.diagrams import ClassDiagram, PackageDiagram
from pylint.pyreverse.utils import LocalsVisitor
BUILTINS_NAME = "builtins"
# diagram generators ##########################################################
class DiaDefGenerator:
"""handle diagram generation options"""
def __init__(self, linker, handler):
"""common Diagram Handler initialization"""
self.config = handler.config
self._set_default_options()
self.linker = linker
self.classdiagram = None # defined by subclasses
def get_title(self, node):
"""get title for objects"""
title = node.name
if self.module_names:
title = "%s.%s" % (node.root().name, title)
return title
def _set_option(self, option):
"""activate some options if not explicitly deactivated"""
# if we have a class diagram, we want more information by default;
# so if the option is None, we return True
if option is None:
return bool(self.config.classes)
return option
def _set_default_options(self):
"""set different default options with _default dictionary"""
self.module_names = self._set_option(self.config.module_names)
all_ancestors = self._set_option(self.config.all_ancestors)
all_associated = self._set_option(self.config.all_associated)
anc_level, association_level = (0, 0)
if all_ancestors:
anc_level = -1
if all_associated:
association_level = -1
if self.config.show_ancestors is not None:
anc_level = self.config.show_ancestors
if self.config.show_associated is not None:
association_level = self.config.show_associated
self.anc_level, self.association_level = anc_level, association_level
def _get_levels(self):
"""help function for search levels"""
return self.anc_level, self.association_level
def show_node(self, node):
"""true if builtins and not show_builtins"""
if self.config.show_builtin:
return True
return node.root().name != BUILTINS_NAME
def add_class(self, node):
"""visit one class and add it to diagram"""
self.linker.visit(node)
self.classdiagram.add_object(self.get_title(node), node)
def get_ancestors(self, node, level):
"""return ancestor nodes of a class node"""
if level == 0:
return
for ancestor in node.ancestors(recurs=False):
if not self.show_node(ancestor):
continue
yield ancestor
def get_associated(self, klass_node, level):
"""return associated nodes of a class node"""
if level == 0:
return
for association_nodes in list(klass_node.instance_attrs_type.values()) + list(
klass_node.locals_type.values()
):
for node in association_nodes:
if isinstance(node, astroid.Instance):
node = node._proxied
if not (isinstance(node, astroid.ClassDef) and self.show_node(node)):
continue
yield node
def extract_classes(self, klass_node, anc_level, association_level):
"""extract recursively classes related to klass_node"""
if self.classdiagram.has_node(klass_node) or not self.show_node(klass_node):
return
self.add_class(klass_node)
for ancestor in self.get_ancestors(klass_node, anc_level):
self.extract_classes(ancestor, anc_level - 1, association_level)
for node in self.get_associated(klass_node, association_level):
self.extract_classes(node, anc_level, association_level - 1)
class DefaultDiadefGenerator(LocalsVisitor, DiaDefGenerator):
"""generate minimum diagram definition for the project :
* a package diagram including project's modules
* a class diagram including project's classes
"""
def __init__(self, linker, handler):
DiaDefGenerator.__init__(self, linker, handler)
LocalsVisitor.__init__(self)
def visit_project(self, node):
"""visit a pyreverse.utils.Project node
create a diagram definition for packages
"""
mode = self.config.mode
if len(node.modules) > 1:
self.pkgdiagram = PackageDiagram("packages %s" % node.name, mode)
else:
self.pkgdiagram = None
self.classdiagram = ClassDiagram("classes %s" % node.name, mode)
def leave_project(self, node): # pylint: disable=unused-argument
"""leave the pyreverse.utils.Project node
return the generated diagram definition
"""
if self.pkgdiagram:
return self.pkgdiagram, self.classdiagram
return (self.classdiagram,)
def visit_module(self, node):
"""visit an astroid.Module node
add this class to the package diagram definition
"""
if self.pkgdiagram:
self.linker.visit(node)
self.pkgdiagram.add_object(node.name, node)
def visit_classdef(self, node):
"""visit an astroid.Class node
add this class to the class diagram definition
"""
anc_level, association_level = self._get_levels()
self.extract_classes(node, anc_level, association_level)
def visit_importfrom(self, node):
"""visit astroid.ImportFrom and catch modules for package diagram
"""
if self.pkgdiagram:
self.pkgdiagram.add_from_depend(node, node.modname)
class ClassDiadefGenerator(DiaDefGenerator):
"""generate a class diagram definition including all classes related to a
given class
"""
def __init__(self, linker, handler):
DiaDefGenerator.__init__(self, linker, handler)
def class_diagram(self, project, klass):
"""return a class diagram definition for the given klass and its
related klasses
"""
self.classdiagram = ClassDiagram(klass, self.config.mode)
if len(project.modules) > 1:
module, klass = klass.rsplit(".", 1)
module = project.get_module(module)
else:
module = project.modules[0]
klass = klass.split(".")[-1]
klass = next(module.ilookup(klass))
anc_level, association_level = self._get_levels()
self.extract_classes(klass, anc_level, association_level)
return self.classdiagram
# diagram handler #############################################################
class DiadefsHandler:
"""handle diagram definitions :
get it from user (i.e. xml files) or generate them
"""
def __init__(self, config):
self.config = config
def get_diadefs(self, project, linker):
"""Get the diagrams configuration data
:param project:The pyreverse project
:type project: pyreverse.utils.Project
:param linker: The linker
:type linker: pyreverse.inspector.Linker(IdGeneratorMixIn, LocalsVisitor)
:returns: The list of diagram definitions
:rtype: list(:class:`pylint.pyreverse.diagrams.ClassDiagram`)
"""
# read and interpret diagram definitions (Diadefs)
diagrams = []
generator = ClassDiadefGenerator(linker, self)
for klass in self.config.classes:
diagrams.append(generator.class_diagram(project, klass))
if not diagrams:
diagrams = DefaultDiadefGenerator(linker, self).visit(project)
for diagram in diagrams:
diagram.extract_relationships()
return diagrams
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