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# Copyright (c) 2008-2010, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015-2018, 2020 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015 Mike Frysinger <vapier@gentoo.org>
# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2018, 2020 Anthony Sottile <asottile@umich.edu>
# Copyright (c) 2018 ssolanki <sushobhitsolanki@gmail.com>
# Copyright (c) 2019-2021 Pierre Sassoulas <pierre.sassoulas@gmail.com>
# Copyright (c) 2019 Kylian <development@goudcode.nl>
# Copyright (c) 2021 Marc Mueller <30130371+cdce8p@users.noreply.github.com>
# Copyright (c) 2021 Mark Byrne <31762852+mbyrnepr2@users.noreply.github.com>
# Copyright (c) 2021 Andreas Finkler <andi.finkler@gmail.com>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
"""Utilities for creating VCG and Dot diagrams"""
import os
from pylint.pyreverse.diagrams import (
ClassDiagram,
ClassEntity,
PackageDiagram,
PackageEntity,
)
from pylint.pyreverse.printer import EdgeType, NodeProperties, NodeType
from pylint.pyreverse.printer_factory import get_printer_for_filetype
from pylint.pyreverse.utils import is_exception
class DiagramWriter:
"""base class for writing project diagrams"""
def __init__(self, config):
self.config = config
self.printer_class = get_printer_for_filetype(self.config.output_format)
self.printer = None # defined in set_printer
self.file_name = "" # defined in set_printer
def write(self, diadefs):
"""write files for <project> according to <diadefs>"""
for diagram in diadefs:
basename = diagram.title.strip().replace(" ", "_")
file_name = f"{basename}.{self.config.output_format}"
if os.path.exists(self.config.output_directory):
file_name = os.path.join(self.config.output_directory, file_name)
self.set_printer(file_name, basename)
if diagram.TYPE == "class":
self.write_classes(diagram)
else:
self.write_packages(diagram)
self.save()
def write_packages(self, diagram: PackageDiagram) -> None:
"""write a package diagram"""
# sorted to get predictable (hence testable) results
for module in sorted(diagram.modules(), key=lambda x: x.title):
module.fig_id = module.node.qname()
self.printer.emit_node(
module.fig_id,
type_=NodeType.PACKAGE,
properties=self.get_package_properties(module),
)
# package dependencies
for rel in diagram.get_relationships("depends"):
self.printer.emit_edge(
rel.from_object.fig_id,
rel.to_object.fig_id,
type_=EdgeType.USES,
)
def write_classes(self, diagram: ClassDiagram) -> None:
"""write a class diagram"""
# sorted to get predictable (hence testable) results
for obj in sorted(diagram.objects, key=lambda x: x.title):
obj.fig_id = obj.node.qname()
type_ = NodeType.INTERFACE if obj.shape == "interface" else NodeType.CLASS
self.printer.emit_node(
obj.fig_id, type_=type_, properties=self.get_class_properties(obj)
)
# inheritance links
for rel in diagram.get_relationships("specialization"):
self.printer.emit_edge(
rel.from_object.fig_id,
rel.to_object.fig_id,
type_=EdgeType.INHERITS,
)
# implementation links
for rel in diagram.get_relationships("implements"):
self.printer.emit_edge(
rel.from_object.fig_id,
rel.to_object.fig_id,
type_=EdgeType.IMPLEMENTS,
)
# generate associations
for rel in diagram.get_relationships("association"):
self.printer.emit_edge(
rel.from_object.fig_id,
rel.to_object.fig_id,
label=rel.name,
type_=EdgeType.ASSOCIATION,
)
def set_printer(self, file_name: str, basename: str) -> None:
"""set printer"""
self.printer = self.printer_class(basename)
self.file_name = file_name
@staticmethod
def get_package_properties(obj: PackageEntity) -> NodeProperties:
"""get label and shape for packages."""
return NodeProperties(
label=obj.title,
color="black",
)
def get_class_properties(self, obj: ClassEntity) -> NodeProperties:
"""get label and shape for classes."""
properties = NodeProperties(
label=obj.title,
attrs=obj.attrs if not self.config.only_classnames else None,
methods=obj.methods if not self.config.only_classnames else None,
fontcolor="red" if is_exception(obj.node) else "black",
color="black",
)
return properties
def save(self) -> None:
"""write to disk"""
self.printer.generate(self.file_name)
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