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qemu-e2k/docs/sphinx/dbusparser.py
Marc-André Lureau 2668dc7b5d docs/sphinx: add sphinx modules to include D-Bus documentation 
Add a new dbus-doc directive to import D-Bus interfaces documentation
from the introspection XML. The comments annotations follow the
gtkdoc/kerneldoc style, and should be formatted with reST.

Note: I realize after the fact that I was implementing those modules
with sphinx 4, and that we have much lower requirements. Instead of
lowering the features and code (removing type annotations etc), let's
have a warning in the documentation when the D-Bus modules can't be
used, and point to the source XML file in that case.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
2021-12-21 10:50:21 +04:00

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# Based from "GDBus - GLib D-Bus Library":
#
# Copyright (C) 2008-2011 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General
# Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
#
# Author: David Zeuthen <davidz@redhat.com>
import xml.parsers.expat
class Annotation:
def __init__(self, key, value):
self.key = key
self.value = value
self.annotations = []
self.since = ""
class Arg:
def __init__(self, name, signature):
self.name = name
self.signature = signature
self.annotations = []
self.doc_string = ""
self.since = ""
class Method:
def __init__(self, name, h_type_implies_unix_fd=True):
self.name = name
self.h_type_implies_unix_fd = h_type_implies_unix_fd
self.in_args = []
self.out_args = []
self.annotations = []
self.doc_string = ""
self.since = ""
self.deprecated = False
self.unix_fd = False
class Signal:
def __init__(self, name):
self.name = name
self.args = []
self.annotations = []
self.doc_string = ""
self.since = ""
self.deprecated = False
class Property:
def __init__(self, name, signature, access):
self.name = name
self.signature = signature
self.access = access
self.annotations = []
self.arg = Arg("value", self.signature)
self.arg.annotations = self.annotations
self.readable = False
self.writable = False
if self.access == "readwrite":
self.readable = True
self.writable = True
elif self.access == "read":
self.readable = True
elif self.access == "write":
self.writable = True
else:
raise ValueError('Invalid access type "{}"'.format(self.access))
self.doc_string = ""
self.since = ""
self.deprecated = False
self.emits_changed_signal = True
class Interface:
def __init__(self, name):
self.name = name
self.methods = []
self.signals = []
self.properties = []
self.annotations = []
self.doc_string = ""
self.doc_string_brief = ""
self.since = ""
self.deprecated = False
class DBusXMLParser:
STATE_TOP = "top"
STATE_NODE = "node"
STATE_INTERFACE = "interface"
STATE_METHOD = "method"
STATE_SIGNAL = "signal"
STATE_PROPERTY = "property"
STATE_ARG = "arg"
STATE_ANNOTATION = "annotation"
STATE_IGNORED = "ignored"
def __init__(self, xml_data, h_type_implies_unix_fd=True):
self._parser = xml.parsers.expat.ParserCreate()
self._parser.CommentHandler = self.handle_comment
self._parser.CharacterDataHandler = self.handle_char_data
self._parser.StartElementHandler = self.handle_start_element
self._parser.EndElementHandler = self.handle_end_element
self.parsed_interfaces = []
self._cur_object = None
self.state = DBusXMLParser.STATE_TOP
self.state_stack = []
self._cur_object = None
self._cur_object_stack = []
self.doc_comment_last_symbol = ""
self._h_type_implies_unix_fd = h_type_implies_unix_fd
self._parser.Parse(xml_data)
COMMENT_STATE_BEGIN = "begin"
COMMENT_STATE_PARAMS = "params"
COMMENT_STATE_BODY = "body"
COMMENT_STATE_SKIP = "skip"
def handle_comment(self, data):
comment_state = DBusXMLParser.COMMENT_STATE_BEGIN
lines = data.split("\n")
symbol = ""
body = ""
in_para = False
params = {}
for line in lines:
orig_line = line
line = line.lstrip()
if comment_state == DBusXMLParser.COMMENT_STATE_BEGIN:
if len(line) > 0:
colon_index = line.find(": ")
if colon_index == -1:
if line.endswith(":"):
symbol = line[0 : len(line) - 1]
comment_state = DBusXMLParser.COMMENT_STATE_PARAMS
else:
comment_state = DBusXMLParser.COMMENT_STATE_SKIP
else:
symbol = line[0:colon_index]
rest_of_line = line[colon_index + 2 :].strip()
if len(rest_of_line) > 0:
body += rest_of_line + "\n"
comment_state = DBusXMLParser.COMMENT_STATE_PARAMS
elif comment_state == DBusXMLParser.COMMENT_STATE_PARAMS:
if line.startswith("@"):
colon_index = line.find(": ")
if colon_index == -1:
comment_state = DBusXMLParser.COMMENT_STATE_BODY
if not in_para:
in_para = True
body += orig_line + "\n"
else:
param = line[1:colon_index]
docs = line[colon_index + 2 :]
params[param] = docs
else:
comment_state = DBusXMLParser.COMMENT_STATE_BODY
if len(line) > 0:
if not in_para:
in_para = True
body += orig_line + "\n"
elif comment_state == DBusXMLParser.COMMENT_STATE_BODY:
if len(line) > 0:
if not in_para:
in_para = True
body += orig_line + "\n"
else:
if in_para:
body += "\n"
in_para = False
if in_para:
body += "\n"
if symbol != "":
self.doc_comment_last_symbol = symbol
self.doc_comment_params = params
self.doc_comment_body = body
def handle_char_data(self, data):
# print 'char_data=%s'%data
pass
def handle_start_element(self, name, attrs):
old_state = self.state
old_cur_object = self._cur_object
if self.state == DBusXMLParser.STATE_IGNORED:
self.state = DBusXMLParser.STATE_IGNORED
elif self.state == DBusXMLParser.STATE_TOP:
if name == DBusXMLParser.STATE_NODE:
self.state = DBusXMLParser.STATE_NODE
else:
self.state = DBusXMLParser.STATE_IGNORED
elif self.state == DBusXMLParser.STATE_NODE:
if name == DBusXMLParser.STATE_INTERFACE:
self.state = DBusXMLParser.STATE_INTERFACE
iface = Interface(attrs["name"])
self._cur_object = iface
self.parsed_interfaces.append(iface)
elif name == DBusXMLParser.STATE_ANNOTATION:
self.state = DBusXMLParser.STATE_ANNOTATION
anno = Annotation(attrs["name"], attrs["value"])
self._cur_object.annotations.append(anno)
self._cur_object = anno
else:
self.state = DBusXMLParser.STATE_IGNORED
# assign docs, if any
if "name" in attrs and self.doc_comment_last_symbol == attrs["name"]:
self._cur_object.doc_string = self.doc_comment_body
if "short_description" in self.doc_comment_params:
short_description = self.doc_comment_params["short_description"]
self._cur_object.doc_string_brief = short_description
if "since" in self.doc_comment_params:
self._cur_object.since = self.doc_comment_params["since"].strip()
elif self.state == DBusXMLParser.STATE_INTERFACE:
if name == DBusXMLParser.STATE_METHOD:
self.state = DBusXMLParser.STATE_METHOD
method = Method(
attrs["name"], h_type_implies_unix_fd=self._h_type_implies_unix_fd
)
self._cur_object.methods.append(method)
self._cur_object = method
elif name == DBusXMLParser.STATE_SIGNAL:
self.state = DBusXMLParser.STATE_SIGNAL
signal = Signal(attrs["name"])
self._cur_object.signals.append(signal)
self._cur_object = signal
elif name == DBusXMLParser.STATE_PROPERTY:
self.state = DBusXMLParser.STATE_PROPERTY
prop = Property(attrs["name"], attrs["type"], attrs["access"])
self._cur_object.properties.append(prop)
self._cur_object = prop
elif name == DBusXMLParser.STATE_ANNOTATION:
self.state = DBusXMLParser.STATE_ANNOTATION
anno = Annotation(attrs["name"], attrs["value"])
self._cur_object.annotations.append(anno)
self._cur_object = anno
else:
self.state = DBusXMLParser.STATE_IGNORED
# assign docs, if any
if "name" in attrs and self.doc_comment_last_symbol == attrs["name"]:
self._cur_object.doc_string = self.doc_comment_body
if "since" in self.doc_comment_params:
self._cur_object.since = self.doc_comment_params["since"].strip()
elif self.state == DBusXMLParser.STATE_METHOD:
if name == DBusXMLParser.STATE_ARG:
self.state = DBusXMLParser.STATE_ARG
arg_name = None
if "name" in attrs:
arg_name = attrs["name"]
arg = Arg(arg_name, attrs["type"])
direction = attrs.get("direction", "in")
if direction == "in":
self._cur_object.in_args.append(arg)
elif direction == "out":
self._cur_object.out_args.append(arg)
else:
raise ValueError('Invalid direction "{}"'.format(direction))
self._cur_object = arg
elif name == DBusXMLParser.STATE_ANNOTATION:
self.state = DBusXMLParser.STATE_ANNOTATION
anno = Annotation(attrs["name"], attrs["value"])
self._cur_object.annotations.append(anno)
self._cur_object = anno
else:
self.state = DBusXMLParser.STATE_IGNORED
# assign docs, if any
if self.doc_comment_last_symbol == old_cur_object.name:
if "name" in attrs and attrs["name"] in self.doc_comment_params:
doc_string = self.doc_comment_params[attrs["name"]]
if doc_string is not None:
self._cur_object.doc_string = doc_string
if "since" in self.doc_comment_params:
self._cur_object.since = self.doc_comment_params[
"since"
].strip()
elif self.state == DBusXMLParser.STATE_SIGNAL:
if name == DBusXMLParser.STATE_ARG:
self.state = DBusXMLParser.STATE_ARG
arg_name = None
if "name" in attrs:
arg_name = attrs["name"]
arg = Arg(arg_name, attrs["type"])
self._cur_object.args.append(arg)
self._cur_object = arg
elif name == DBusXMLParser.STATE_ANNOTATION:
self.state = DBusXMLParser.STATE_ANNOTATION
anno = Annotation(attrs["name"], attrs["value"])
self._cur_object.annotations.append(anno)
self._cur_object = anno
else:
self.state = DBusXMLParser.STATE_IGNORED
# assign docs, if any
if self.doc_comment_last_symbol == old_cur_object.name:
if "name" in attrs and attrs["name"] in self.doc_comment_params:
doc_string = self.doc_comment_params[attrs["name"]]
if doc_string is not None:
self._cur_object.doc_string = doc_string
if "since" in self.doc_comment_params:
self._cur_object.since = self.doc_comment_params[
"since"
].strip()
elif self.state == DBusXMLParser.STATE_PROPERTY:
if name == DBusXMLParser.STATE_ANNOTATION:
self.state = DBusXMLParser.STATE_ANNOTATION
anno = Annotation(attrs["name"], attrs["value"])
self._cur_object.annotations.append(anno)
self._cur_object = anno
else:
self.state = DBusXMLParser.STATE_IGNORED
elif self.state == DBusXMLParser.STATE_ARG:
if name == DBusXMLParser.STATE_ANNOTATION:
self.state = DBusXMLParser.STATE_ANNOTATION
anno = Annotation(attrs["name"], attrs["value"])
self._cur_object.annotations.append(anno)
self._cur_object = anno
else:
self.state = DBusXMLParser.STATE_IGNORED
elif self.state == DBusXMLParser.STATE_ANNOTATION:
if name == DBusXMLParser.STATE_ANNOTATION:
self.state = DBusXMLParser.STATE_ANNOTATION
anno = Annotation(attrs["name"], attrs["value"])
self._cur_object.annotations.append(anno)
self._cur_object = anno
else:
self.state = DBusXMLParser.STATE_IGNORED
else:
raise ValueError(
'Unhandled state "{}" while entering element with name "{}"'.format(
self.state, name
)
)
self.state_stack.append(old_state)
self._cur_object_stack.append(old_cur_object)
def handle_end_element(self, name):
self.state = self.state_stack.pop()
self._cur_object = self._cur_object_stack.pop()
def parse_dbus_xml(xml_data):
parser = DBusXMLParser(xml_data, True)
return parser.parsed_interfaces
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