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"""Library code for language-independent D-Bus-related code generation.
The master copy of this library is in the telepathy-glib repository -
please make any changes there.
"""
# Copyright (C) 2006-2008 Collabora Limited
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
from string import ascii_letters, digits
NS_TP = "http://telepathy.freedesktop.org/wiki/DbusSpec#extensions-v0"
_ASCII_ALNUM = ascii_letters + digits
def file_set_contents(filename, contents):
try:
os.remove(filename)
except OSError:
pass
try:
os.remove(filename + '.tmp')
except OSError:
pass
open(filename + '.tmp', 'w').write(contents)
os.rename(filename + '.tmp', filename)
def cmp_by_name(node1, node2):
return cmp(node1.getAttributeNode("name").nodeValue,
node2.getAttributeNode("name").nodeValue)
def escape_as_identifier(identifier):
"""Escape the given string to be a valid D-Bus object path or service
name component, using a reversible encoding to ensure uniqueness.
The reversible encoding is as follows:
* The empty string becomes '_'
* Otherwise, each non-alphanumeric character is replaced by '_' plus
two lower-case hex digits; the same replacement is carried out on
the first character, if it's a digit
"""
# '' -> '_'
if not identifier:
return '_'
# A bit of a fast path for strings which are already OK.
# We deliberately omit '_' because, for reversibility, that must also
# be escaped.
if (identifier.strip(_ASCII_ALNUM) == '' and
identifier[0] in ascii_letters):
return identifier
# The first character may not be a digit
if identifier[0] not in ascii_letters:
ret = ['_%02x' % ord(identifier[0])]
else:
ret = [identifier[0]]
# Subsequent characters may be digits or ASCII letters
for c in identifier[1:]:
if c in _ASCII_ALNUM:
ret.append(c)
else:
ret.append('_%02x' % ord(c))
return ''.join(ret)
def get_by_path(element, path):
branches = path.split('/')
branch = branches[0]
# Is the current branch an attribute, if so, return the attribute value
if branch[0] == '@':
return element.getAttribute(branch[1:])
# Find matching children for the branch
children = []
if branch == '..':
children.append(element.parentNode)
else:
for x in element.childNodes:
if x.localName == branch:
children.append(x)
ret = []
# If this is not the last path element, recursively gather results from
# children
if len(branches) > 1:
for x in children:
add = get_by_path(x, '/'.join(branches[1:]))
if isinstance(add, list):
ret += add
else:
return add
else:
ret = children
return ret
def get_docstring(element):
docstring = None
for x in element.childNodes:
if x.namespaceURI == NS_TP and x.localName == 'docstring':
docstring = x
if docstring is not None:
docstring = docstring.toxml().replace('\n', ' ').strip()
if docstring.startswith('<tp:docstring>'):
docstring = docstring[14:].lstrip()
if docstring.endswith('</tp:docstring>'):
docstring = docstring[:-15].rstrip()
if docstring in ('<tp:docstring/>', ''):
docstring = ''
return docstring
def get_deprecated(element):
text = []
for x in element.childNodes:
if hasattr(x, 'data'):
text.append(x.data.replace('\n', ' ').strip())
else:
# This caters for tp:dbus-ref elements, but little else.
if x.childNodes and hasattr(x.childNodes[0], 'data'):
text.append(x.childNodes[0].data.replace('\n', ' ').strip())
return ' '.join(text)
def get_descendant_text(element_or_elements):
if not element_or_elements:
return ''
if isinstance(element_or_elements, list):
return ''.join(map(get_descendant_text, element_or_elements))
parts = []
for x in element_or_elements.childNodes:
if x.nodeType == x.TEXT_NODE:
parts.append(x.nodeValue)
elif x.nodeType == x.ELEMENT_NODE:
parts.append(get_descendant_text(x))
else:
pass
return ''.join(parts)
class _SignatureIter:
"""Iterator over a D-Bus signature. Copied from dbus-python 0.71 so we
can run genginterface in a limited environment with only Python
(like Scratchbox).
"""
def __init__(self, string):
self.remaining = string
def next(self):
if self.remaining == '':
raise StopIteration
signature = self.remaining
block_depth = 0
block_type = None
end = len(signature)
for marker in range(0, end):
cur_sig = signature[marker]
if cur_sig == 'a':
pass
elif cur_sig == '{' or cur_sig == '(':
if block_type == None:
block_type = cur_sig
if block_type == cur_sig:
block_depth = block_depth + 1
elif cur_sig == '}':
if block_type == '{':
block_depth = block_depth - 1
if block_depth == 0:
end = marker
break
elif cur_sig == ')':
if block_type == '(':
block_depth = block_depth - 1
if block_depth == 0:
end = marker
break
else:
if block_depth == 0:
end = marker
break
end = end + 1
self.remaining = signature[end:]
return Signature(signature[0:end])
class Signature(str):
"""A string, iteration over which is by D-Bus single complete types
rather than characters.
"""
def __iter__(self):
return _SignatureIter(self)
def xml_escape(s):
s = s.replace('&', '&').replace("'", ''').replace('"', '"')
return s.replace('<', '<').replace('>', '>')
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