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-# -*- coding: utf-8 -*-
-r"""
- sphinx.ext.inheritance_diagram
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- Defines a docutils directive for inserting inheritance diagrams.
-
- Provide the directive with one or more classes or modules (separated
- by whitespace). For modules, all of the classes in that module will
- be used.
-
- Example::
-
- Given the following classes:
-
- class A: pass
- class B(A): pass
- class C(A): pass
- class D(B, C): pass
- class E(B): pass
-
- .. inheritance-diagram: D E
-
- Produces a graph like the following:
-
- A
- / \
- B C
- / \ /
- E D
-
- The graph is inserted as a PNG+image map into HTML and a PDF in
- LaTeX.
-
- :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
- :copyright: Copyright 2010-2011 by the PySide team.
- :license: BSD, see LICENSE for details.
-"""
-
-import os
-import re
-import sys
-import inspect
-try:
- from hashlib import md5
-except ImportError:
- from md5 import md5
-
-from docutils import nodes
-from docutils.parsers.rst import directives, Directive
-
-from sphinx.ext.graphviz import render_dot_html, render_dot_latex
-
-class InheritanceException(Exception):
- pass
-
-# When passed something like:
-# PySide2.QtCore.QStateMachine.SignalEvent
-# try to import the underlying module and return a
-# handle to the object. In a loop, import
-# PySide2.QtCore.QStateMachine.SignalEvent
-# PySide2.QtCore.QStateMachine
-# PySide2.QtCore
-# until the import succeeds and walk up the attributes
-# to obtain the object
-
-def importClassOrModule(name):
- components = name.split('.')
- for i in range(len(components), 0, -1):
- importPath = '.'.join(components[: i])
- try:
- __import__(importPath)
- except ImportError:
- continue
- if i == len(components):
- return sys.modules[importPath]
- remaining = components[i :]
- cls = sys.modules[importPath]
- for component in remaining:
- try:
- cls = getattr(cls, component)
- except Exception: # No such attribute
- return None
- return cls
- return None
-
-class InheritanceGraph(object):
- """
- Given a list of classes, determines the set of classes that they inherit
- from all the way to the root "object", and then is able to generate a
- graphviz dot graph from them.
- """
- def __init__(self, class_names, currmodule, show_builtins=False, parts=0):
- """
- *class_names* is a list of child classes to show bases from.
-
- If *show_builtins* is True, then Python builtins will be shown
- in the graph.
- """
- self.class_names = class_names
- classes = self._import_classes(class_names, currmodule)
- self.class_info = self._class_info(classes, show_builtins, parts)
- if not self.class_info:
- raise InheritanceException('No classes found for '
- 'inheritance diagram')
-
- def _import_class_or_module(self, name, currmodule):
- """
- Import a class using its fully-qualified *name*.
- """
- todoc = importClassOrModule(name)
- if not todoc and currmodule is not None:
- todoc = importClassOrModule(currmodule + '.' + name)
- if not todoc:
- moduleStr = '(module {})'.format(currmodule) if currmodule else ''
- raise InheritanceException('Could not import class {} specified for '
- 'inheritance diagram {}.'.format(name, moduleStr))
- if inspect.isclass(todoc):
- return [todoc]
- elif inspect.ismodule(todoc):
- classes = []
- for cls in todoc.__dict__.values():
- if inspect.isclass(cls) and cls.__module__ == todoc.__name__:
- classes.append(cls)
- return classes
- raise InheritanceException('%r specified for inheritance diagram is '
- 'not a class or module' % name)
-
- def _import_classes(self, class_names, currmodule):
- """Import a list of classes."""
- classes = []
- for name in class_names:
- classes.extend(self._import_class_or_module(name, currmodule))
- return classes
-
- def _class_info(self, classes, show_builtins, parts):
- """Return name and bases for all classes that are ancestors of
- *classes*.
-
- *parts* gives the number of dotted name parts that is removed from the
- displayed node names.
- """
- all_classes = {}
- builtins = __builtins__.values()
-
- def recurse(cls):
- if not show_builtins and cls in builtins:
- return
-
- nodename = self.class_name(cls, parts)
- fullname = self.class_name(cls, 0)
-
- baselist = []
- all_classes[cls] = (nodename, fullname, baselist)
- for base in cls.__bases__:
- if not show_builtins and base in builtins:
- continue
- if base.__name__ == "Object" and base.__module__ == "Shiboken":
- continue
- baselist.append(self.class_name(base, parts))
- if base not in all_classes:
- recurse(base)
-
- for cls in classes:
- recurse(cls)
-
- return list(all_classes.values())
-
- def class_name(self, cls, parts=0):
- """Given a class object, return a fully-qualified name.
-
- This works for things I've tested in matplotlib so far, but may not be
- completely general.
- """
- module = cls.__module__
- if module == '__builtin__':
- fullname = cls.__name__
- else:
- fullname = '%s.%s' % (module, cls.__qualname__)
- if parts == 0:
- return fullname
- name_parts = fullname.split('.')
- return '.'.join(name_parts[-parts:])
-
- def get_all_class_names(self):
- """
- Get all of the class names involved in the graph.
- """
- return [fullname for (_, fullname, _) in self.class_info]
-
- # These are the default attrs for graphviz
- default_graph_attrs = {
- 'rankdir': 'LR',
- 'size': '"8.0, 12.0"',
- }
- default_node_attrs = {
- 'shape': 'box',
- 'fontsize': 10,
- 'height': 0.25,
- 'fontname': '"Vera Sans, DejaVu Sans, Liberation Sans, '
- 'Arial, Helvetica, sans"',
- 'style': '"setlinewidth(0.5)"',
- }
- default_edge_attrs = {
- 'arrowsize': 0.5,
- 'style': '"setlinewidth(0.5)"',
- }
-
- def _format_node_attrs(self, attrs):
- return ','.join(['%s=%s' % x for x in attrs.items()])
-
- def _format_graph_attrs(self, attrs):
- return ''.join(['%s=%s;\n' % x for x in attrs.items()])
-
- def generate_dot(self, name, urls={}, env=None,
- graph_attrs={}, node_attrs={}, edge_attrs={}):
- """
- Generate a graphviz dot graph from the classes that
- were passed in to __init__.
-
- *name* is the name of the graph.
-
- *urls* is a dictionary mapping class names to HTTP URLs.
-
- *graph_attrs*, *node_attrs*, *edge_attrs* are dictionaries containing
- key/value pairs to pass on as graphviz properties.
- """
- g_attrs = self.default_graph_attrs.copy()
- n_attrs = self.default_node_attrs.copy()
- e_attrs = self.default_edge_attrs.copy()
- g_attrs.update(graph_attrs)
- n_attrs.update(node_attrs)
- e_attrs.update(edge_attrs)
- if env:
- g_attrs.update(env.config.inheritance_graph_attrs)
- n_attrs.update(env.config.inheritance_node_attrs)
- e_attrs.update(env.config.inheritance_edge_attrs)
-
- res = []
- res.append('digraph %s {\n' % name)
- res.append(self._format_graph_attrs(g_attrs))
-
- for name, fullname, bases in self.class_info:
- # Write the node
- this_node_attrs = n_attrs.copy()
- url = urls.get(fullname)
- if url is not None:
- this_node_attrs['URL'] = '"%s"' % url
- res.append(' "%s" [%s];\n' %
- (name, self._format_node_attrs(this_node_attrs)))
-
- # Write the edges
- for base_name in bases:
- res.append(' "%s" -> "%s" [%s];\n' %
- (base_name, name,
- self._format_node_attrs(e_attrs)))
- res.append('}\n')
- return ''.join(res)
-
-
-class inheritance_diagram(nodes.General, nodes.Element):
- """
- A docutils node to use as a placeholder for the inheritance diagram.
- """
- pass
-
-
-class InheritanceDiagram(Directive):
- """
- Run when the inheritance_diagram directive is first encountered.
- """
- has_content = False
- required_arguments = 1
- optional_arguments = 0
- final_argument_whitespace = True
- option_spec = {
- 'parts': directives.nonnegative_int,
- }
-
- def run(self):
- node = inheritance_diagram()
- node.document = self.state.document
- env = self.state.document.settings.env
- class_names = self.arguments[0].split()
- class_role = env.get_domain('py').role('class')
- # Store the original content for use as a hash
- node['parts'] = self.options.get('parts', 0)
- node['content'] = ', '.join(class_names)
-
- # Create a graph starting with the list of classes
- try:
- graph = InheritanceGraph(
- class_names, env.temp_data.get('py:module'),
- parts=node['parts'])
- except InheritanceException as err:
- return [node.document.reporter.warning(err.args[0],
- line=self.lineno)]
-
- # Create xref nodes for each target of the graph's image map and
- # add them to the doc tree so that Sphinx can resolve the
- # references to real URLs later. These nodes will eventually be
- # removed from the doctree after we're done with them.
- for name in graph.get_all_class_names():
- refnodes, x = class_role(
- 'class', ':class:`%s`' % name, name, 0, self.state)
- node.extend(refnodes)
- # Store the graph object so we can use it to generate the
- # dot file later
- node['graph'] = graph
- return [node]
-
-
-def get_graph_hash(node):
- hashString = node['content'] + str(node['parts'])
- return md5(hashString.encode('utf-8')).hexdigest()[-10:]
-
-
-def html_visit_inheritance_diagram(self, node):
- """
- Output the graph for HTML. This will insert a PNG with clickable
- image map.
- """
- graph = node['graph']
-
- graph_hash = get_graph_hash(node)
- name = 'inheritance%s' % graph_hash
-
- # Create a mapping from fully-qualified class names to URLs.
- urls = {}
- for child in node:
- if child.get('refuri') is not None:
- urls[child['reftitle']] = child.get('refuri')
- elif child.get('refid') is not None:
- urls[child['reftitle']] = '#' + child.get('refid')
-
- dotcode = graph.generate_dot(name, urls, env=self.builder.env)
- render_dot_html(self, node, dotcode, {}, 'inheritance', 'inheritance',
- alt='Inheritance diagram of ' + node['content'])
- raise nodes.SkipNode
-
-
-def latex_visit_inheritance_diagram(self, node):
- """
- Output the graph for LaTeX. This will insert a PDF.
- """
- graph = node['graph']
-
- graph_hash = get_graph_hash(node)
- name = 'inheritance%s' % graph_hash
-
- dotcode = graph.generate_dot(name, env=self.builder.env,
- graph_attrs={'size': '"6.0,6.0"'})
- render_dot_latex(self, node, dotcode, {}, 'inheritance')
- raise nodes.SkipNode
-
-
-def skip(self, node):
- raise nodes.SkipNode
-
-
-def setup(app):
- app.setup_extension('sphinx.ext.graphviz')
- app.add_node(
- inheritance_diagram,
- latex=(latex_visit_inheritance_diagram, None),
- html=(html_visit_inheritance_diagram, None),
- text=(skip, None),
- man=(skip, None))
- app.add_directive('inheritance-diagram', InheritanceDiagram)
- app.add_config_value('inheritance_graph_attrs', {}, False),
- app.add_config_value('inheritance_node_attrs', {}, False),
- app.add_config_value('inheritance_edge_attrs', {}, False),