forked from varia/varia.website
200 lines
7.0 KiB
Python
200 lines
7.0 KiB
Python
# $Id: docutils_xml.py 8368 2019-08-27 12:10:14Z milde $
|
|
# Author: David Goodger, Paul Tremblay, Guenter Milde
|
|
# Maintainer: docutils-develop@lists.sourceforge.net
|
|
# Copyright: This module has been placed in the public domain.
|
|
|
|
"""
|
|
Simple document tree Writer, writes Docutils XML according to
|
|
http://docutils.sourceforge.net/docs/ref/docutils.dtd.
|
|
"""
|
|
|
|
__docformat__ = 'reStructuredText'
|
|
|
|
import sys
|
|
import xml.sax.saxutils
|
|
|
|
import docutils
|
|
from docutils import frontend, writers, nodes
|
|
|
|
if sys.version_info >= (3, 0):
|
|
from io import StringIO # noqa
|
|
else:
|
|
from StringIO import StringIO # noqa
|
|
|
|
|
|
if sys.version_info >= (3, 0):
|
|
unicode = str # noqa
|
|
|
|
|
|
class RawXmlError(docutils.ApplicationError): pass
|
|
|
|
|
|
class Writer(writers.Writer):
|
|
|
|
supported = ('xml',)
|
|
"""Formats this writer supports."""
|
|
|
|
settings_spec = (
|
|
'"Docutils XML" Writer Options',
|
|
None,
|
|
(('Generate XML with newlines before and after tags.',
|
|
['--newlines'],
|
|
{'action': 'store_true', 'validator': frontend.validate_boolean}),
|
|
('Generate XML with indents and newlines.',
|
|
['--indents'], #@ TODO use integer value for number of spaces?
|
|
{'action': 'store_true', 'validator': frontend.validate_boolean}),
|
|
('Omit the XML declaration. Use with caution.',
|
|
['--no-xml-declaration'],
|
|
{'dest': 'xml_declaration', 'default': 1, 'action': 'store_false',
|
|
'validator': frontend.validate_boolean}),
|
|
('Omit the DOCTYPE declaration.',
|
|
['--no-doctype'],
|
|
{'dest': 'doctype_declaration', 'default': 1,
|
|
'action': 'store_false', 'validator': frontend.validate_boolean}),))
|
|
|
|
settings_defaults = {'output_encoding_error_handler': 'xmlcharrefreplace'}
|
|
|
|
config_section = 'docutils_xml writer'
|
|
config_section_dependencies = ('writers',)
|
|
|
|
output = None
|
|
"""Final translated form of `document`."""
|
|
|
|
def __init__(self):
|
|
writers.Writer.__init__(self)
|
|
self.translator_class = XMLTranslator
|
|
|
|
def translate(self):
|
|
self.visitor = visitor = self.translator_class(self.document)
|
|
self.document.walkabout(visitor)
|
|
self.output = ''.join(visitor.output)
|
|
|
|
|
|
class XMLTranslator(nodes.GenericNodeVisitor):
|
|
|
|
xml_declaration = '<?xml version="1.0" encoding="%s"?>\n'
|
|
# TODO: add stylesheet options similar to HTML and LaTeX writers?
|
|
#xml_stylesheet = '<?xml-stylesheet type="text/xsl" href="%s"?>\n'
|
|
doctype = (
|
|
'<!DOCTYPE document PUBLIC'
|
|
' "+//IDN docutils.sourceforge.net//DTD Docutils Generic//EN//XML"'
|
|
' "http://docutils.sourceforge.net/docs/ref/docutils.dtd">\n')
|
|
generator = '<!-- Generated by Docutils %s -->\n'
|
|
|
|
xmlparser = xml.sax.make_parser()
|
|
"""SAX parser instance to check/exctract raw XML."""
|
|
xmlparser.setFeature(
|
|
"http://xml.org/sax/features/external-general-entities", True)
|
|
|
|
def __init__(self, document):
|
|
nodes.NodeVisitor.__init__(self, document)
|
|
|
|
# Reporter
|
|
self.warn = self.document.reporter.warning
|
|
self.error = self.document.reporter.error
|
|
|
|
# Settings
|
|
self.settings = settings = document.settings
|
|
self.indent = self.newline = ''
|
|
if settings.newlines:
|
|
self.newline = '\n'
|
|
if settings.indents:
|
|
self.newline = '\n'
|
|
self.indent = ' ' #@ TODO make this configurable?
|
|
self.level = 0 # indentation level
|
|
self.in_simple = 0 # level of nesting inside mixed-content elements
|
|
self.fixed_text = 0 # level of nesting inside FixedText elements
|
|
|
|
# Output
|
|
self.output = []
|
|
if settings.xml_declaration:
|
|
self.output.append(
|
|
self.xml_declaration % settings.output_encoding)
|
|
if settings.doctype_declaration:
|
|
self.output.append(self.doctype)
|
|
self.output.append(self.generator % docutils.__version__)
|
|
|
|
# initialize XML parser
|
|
self.the_handle=TestXml()
|
|
self.xmlparser.setContentHandler(self.the_handle)
|
|
|
|
# generic visit and depart methods
|
|
# --------------------------------
|
|
|
|
simple_nodes = (nodes.TextElement,
|
|
nodes.image, nodes.colspec, nodes.transition) # empty elements
|
|
|
|
def default_visit(self, node):
|
|
"""Default node visit method."""
|
|
if not self.in_simple:
|
|
self.output.append(self.indent*self.level)
|
|
self.output.append(node.starttag(xml.sax.saxutils.quoteattr))
|
|
self.level += 1
|
|
# @@ make nodes.literal an instance of FixedTextElement?
|
|
if isinstance(node, (nodes.FixedTextElement, nodes.literal)):
|
|
self.fixed_text += 1
|
|
if isinstance(node, self.simple_nodes):
|
|
self.in_simple += 1
|
|
if not self.in_simple:
|
|
self.output.append(self.newline)
|
|
|
|
def default_departure(self, node):
|
|
"""Default node depart method."""
|
|
self.level -= 1
|
|
if not self.in_simple:
|
|
self.output.append(self.indent*self.level)
|
|
self.output.append(node.endtag())
|
|
if isinstance(node, (nodes.FixedTextElement, nodes.literal)):
|
|
self.fixed_text -= 1
|
|
if isinstance(node, self.simple_nodes):
|
|
self.in_simple -= 1
|
|
if not self.in_simple:
|
|
self.output.append(self.newline)
|
|
|
|
|
|
# specific visit and depart methods
|
|
# ---------------------------------
|
|
|
|
def visit_Text(self, node):
|
|
text = xml.sax.saxutils.escape(node.astext())
|
|
# indent text if we are not in a FixedText element:
|
|
if not self.fixed_text:
|
|
text = text.replace('\n', '\n'+self.indent*self.level)
|
|
self.output.append(text)
|
|
|
|
def depart_Text(self, node):
|
|
pass
|
|
|
|
def visit_raw(self, node):
|
|
if 'xml' not in node.get('format', '').split():
|
|
# skip other raw content?
|
|
# raise nodes.SkipNode
|
|
self.default_visit(node)
|
|
return
|
|
# wrap in <raw> element
|
|
self.default_visit(node) # or not?
|
|
xml_string = node.astext()
|
|
self.output.append(xml_string)
|
|
self.default_departure(node) # or not?
|
|
# Check validity of raw XML:
|
|
if isinstance(xml_string, unicode) and sys.version_info < (3, 0):
|
|
xml_string = xml_string.encode('utf8')
|
|
try:
|
|
self.xmlparser.parse(StringIO(xml_string))
|
|
except xml.sax._exceptions.SAXParseException as error:
|
|
col_num = self.the_handle.locator.getColumnNumber()
|
|
line_num = self.the_handle.locator.getLineNumber()
|
|
srcline = node.line
|
|
if not isinstance(node.parent, nodes.TextElement):
|
|
srcline += 2 # directive content start line
|
|
msg = 'Invalid raw XML in column %d, line offset %d:\n%s' % (
|
|
col_num, line_num, node.astext())
|
|
self.warn(msg, source=node.source, line=srcline+line_num-1)
|
|
raise nodes.SkipNode # content already processed
|
|
|
|
|
|
class TestXml(xml.sax.handler.ContentHandler):
|
|
|
|
def setDocumentLocator(self, locator):
|
|
self.locator = locator
|