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# -*- coding: utf-8 -*-
# Copyright (c) 2008-2010, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015-2017 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 ssolanki <sushobhitsolanki@gmail.com>
# Copyright (c) 2018 Anthony Sottile <asottile@umich.edu>
# 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.pyreverse.utils import is_exception
from pylint.pyreverse.vcgutils import VCGPrinter
from pylint.graph import DotBackend
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 = '%s.%s' % (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'%s|%s\l|' % (label, r'\l'.join(obj.attrs))
for func in obj.methods:
label = r'%s%s()\l' % (label, func.name)
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 = r'%s\n\f%s' % (label, line)
for attr in attrs:
label = r'%s\n\f08%s' % (label, attr)
if attrs:
label = r'%s\n\f%s' % (label, line)
for func in methods:
label = r'%s\n\f10%s()' % (label, 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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