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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>
# 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
"""Utilities for creating VCG and Dot diagrams"""
from pylint.graph import DotBackend
from pylint.pyreverse.utils import is_exception
from pylint.pyreverse.vcgutils import VCGPrinter
class DiagramWriter:
"""base class for writing project diagrams"""
def __init__(self, config, styles):
self.config = config
self.pkg_edges, self.inh_edges, self.imp_edges, self.association_edges = styles
self.printer = None # 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}"
self.set_printer(file_name, basename)
if diagram.TYPE == "class":
self.write_classes(diagram)
else:
self.write_packages(diagram)
self.close_graph()
def write_packages(self, diagram):
"""write a package diagram"""
# sorted to get predictable (hence testable) results
for i, obj in enumerate(sorted(diagram.modules(), key=lambda x: x.title)):
self.printer.emit_node(i, label=self.get_title(obj), shape="box")
obj.fig_id = i
# package dependencies
for rel in diagram.get_relationships("depends"):
self.printer.emit_edge(
rel.from_object.fig_id, rel.to_object.fig_id, **self.pkg_edges
)
def write_classes(self, diagram):
"""write a class diagram"""
# sorted to get predictable (hence testable) results
for i, obj in enumerate(sorted(diagram.objects, key=lambda x: x.title)):
self.printer.emit_node(i, **self.get_values(obj))
obj.fig_id = i
# inheritance links
for rel in diagram.get_relationships("specialization"):
self.printer.emit_edge(
rel.from_object.fig_id, rel.to_object.fig_id, **self.inh_edges
)
# implementation links
for rel in diagram.get_relationships("implements"):
self.printer.emit_edge(
rel.from_object.fig_id, rel.to_object.fig_id, **self.imp_edges
)
# 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,
**self.association_edges,
)
def set_printer(self, file_name, basename):
"""set printer"""
raise NotImplementedError
def get_title(self, obj):
"""get project title"""
raise NotImplementedError
def get_values(self, obj):
"""get label and shape for classes."""
raise NotImplementedError
def close_graph(self):
"""finalize the graph"""
raise NotImplementedError
class DotWriter(DiagramWriter):
"""write dot graphs from a diagram definition and a project"""
def __init__(self, config):
styles = [
dict(arrowtail="none", arrowhead="open"),
dict(arrowtail="none", arrowhead="empty"),
dict(arrowtail="node", arrowhead="empty", style="dashed"),
dict(
fontcolor="green", arrowtail="none", arrowhead="diamond", style="solid"
),
]
DiagramWriter.__init__(self, config, styles)
def set_printer(self, file_name, basename):
"""initialize DotWriter and add options for layout."""
layout = dict(rankdir="BT")
self.printer = DotBackend(basename, additional_param=layout)
self.file_name = file_name
def get_title(self, obj):
"""get project title"""
return obj.title
def get_values(self, obj):
"""get label and shape for classes.
The label contains all attributes and methods
"""
label = obj.title
if obj.shape == "interface":
label = "«interface»\\n%s" % label
if not self.config.only_classnames:
label = r"{}|{}\l|".format(label, r"\l".join(obj.attrs))
for func in obj.methods:
if func.args.args:
args = [arg.name for arg in func.args.args if arg.name != "self"]
else:
args = []
label = r"{}{}({})\l".format(label, func.name, ", ".join(args))
label = "{%s}" % label
if is_exception(obj.node):
return dict(fontcolor="red", label=label, shape="record")
return dict(label=label, shape="record")
def close_graph(self):
"""print the dot graph into <file_name>"""
self.printer.generate(self.file_name)
class VCGWriter(DiagramWriter):
"""write vcg graphs from a diagram definition and a project"""
def __init__(self, config):
styles = [
dict(arrowstyle="solid", backarrowstyle="none", backarrowsize=0),
dict(arrowstyle="solid", backarrowstyle="none", backarrowsize=10),
dict(
arrowstyle="solid",
backarrowstyle="none",
linestyle="dotted",
backarrowsize=10,
),
dict(arrowstyle="solid", backarrowstyle="none", textcolor="green"),
]
DiagramWriter.__init__(self, config, styles)
def set_printer(self, file_name, basename):
"""initialize VCGWriter for a UML graph"""
self.graph_file = open(file_name, "w+")
self.printer = VCGPrinter(self.graph_file)
self.printer.open_graph(
title=basename,
layoutalgorithm="dfs",
late_edge_labels="yes",
port_sharing="no",
manhattan_edges="yes",
)
self.printer.emit_node = self.printer.node
self.printer.emit_edge = self.printer.edge
def get_title(self, obj):
"""get project title in vcg format"""
return r"\fb%s\fn" % obj.title
def get_values(self, obj):
"""get label and shape for classes.
The label contains all attributes and methods
"""
if is_exception(obj.node):
label = r"\fb\f09%s\fn" % obj.title
else:
label = r"\fb%s\fn" % obj.title
if obj.shape == "interface":
shape = "ellipse"
else:
shape = "box"
if not self.config.only_classnames:
attrs = obj.attrs
methods = [func.name for func in obj.methods]
# box width for UML like diagram
maxlen = max(len(name) for name in [obj.title] + methods + attrs)
line = "_" * (maxlen + 2)
label = fr"{label}\n\f{line}"
for attr in attrs:
label = fr"{label}\n\f08{attr}"
if attrs:
label = fr"{label}\n\f{line}"
for func in methods:
label = fr"{label}\n\f10{func}()"
return dict(label=label, shape=shape)
def close_graph(self):
"""close graph and file"""
self.printer.close_graph()
self.graph_file.close()
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