comparison doc/hgmanpage.py @ 43076:2372284d9457

formatting: blacken the codebase

This is using my patch to black
(https://github.com/psf/black/pull/826) so we don't un-wrap collection
literals.

Done with:

  hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S

# skip-blame mass-reformatting only

# no-check-commit reformats foo_bar functions

Differential Revision: https://phab.mercurial-scm.org/D6971

43075:57875cf423c9

from docutils import (
    languages,
    nodes,
    writers,
)
try:
    import roman
except ImportError:
    from docutils.utils import roman

OPTION_LIST_INDENT = 7
BLOCKQOUTE_INDENT = 3.5

# Define two macros so man/roff can calculate the
# indent/unindent margins by itself
MACRO_DEF = (r""".
.nr rst2man-indent-level 0
.
.de1 rstReportMargin
\\$1 \\n[an-margin]
level \\n[rst2man-indent-level]

.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
.nr rst2man-indent-level -1
.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
..
""")

class Writer(writers.Writer):

    supported = ('manpage')
    """Formats this writer supports."""

    output = None
    """Final translated form of `document`."""

    def __init__(self):
        self._rows = []
        self._options = ['center']
        self._tab_char = '\t'
        self._coldefs = []
    def new_row(self):
        self._rows.append([])
    def append_separator(self, separator):
        """Append the separator for table head."""
        self._rows.append([separator])
    def append_cell(self, cell_lines):
        """cell_lines is an array of lines"""
        start = 0
        if len(cell_lines) > 0 and cell_lines[0] == '.sp\n':
            start = 1
        self._rows[-1].append(cell_lines[start:])
        if len(self._coldefs) < len(self._rows[-1]):
            self._coldefs.append('l')
    def _minimize_cell(self, cell_lines):
        """Remove leading and trailing blank and ``.sp`` lines"""
        while (cell_lines and cell_lines[0] in ('\n', '.sp\n')):
            del cell_lines[0]
        while (cell_lines and cell_lines[-1] in ('\n', '.sp\n')):
            del cell_lines[-1]
    def as_list(self):
        text = ['.TS\n']
        text.append(' '.join(self._options) + ';\n')
        text.append('|%s|.\n' % ('|'.join(self._coldefs)))
        for row in self._rows:
            # row = array of cells. cell = array of lines.
            text.append('_\n')       # line above
            text.append('T{\n')
            for i in range(len(row)):
                cell = row[i]
                self._minimize_cell(cell)
                text.extend(cell)
                if not text[-1].endswith('\n'):
                    text[-1] += '\n'
                if i < len(row) - 1:
                    text.append('T}'+self._tab_char+'T{\n')
                else:
                    text.append('T}\n')
        text.append('_\n')
        text.append('.TE\n')
        return text

class Translator(nodes.NodeVisitor):
    """"""

    words_and_spaces = re.compile(r'\S+| +|\n')

        nodes.NodeVisitor.__init__(self, document)
        self.settings = settings = document.settings
        lcode = settings.language_code
        arglen = len(inspect.getargspec(languages.get_language)[0])
        if arglen == 2:
            self.language = languages.get_language(lcode,
                                                   self.document.reporter)
        else:
            self.language = languages.get_language(lcode)
        self.head = []
        self.body = []
        self.foot = []

        # the list style "*" bullet or "#" numbered
        self._list_char = []
        # writing the header .TH and .SH NAME is postboned after
        # docinfo.
        self._docinfo = {
                "title" : "", "title_upper": "",
                "subtitle" : "",
                "manual_section" : "", "manual_group" : "",
                "author" : [],
                "date" : "",
                "copyright" : "",
                "version" : "",
                    }
        self._docinfo_keys = []     # a list to keep the sequence as in source.
        self._docinfo_names = {}    # to get name from text not normalized.
        self._in_docinfo = None
        self._active_table = None
        self._in_literal = False
        self.header_written = 0
        self._line_block = 0

        # Fonts are put on a stack, the top one is used.
        # ``.ft P`` or ``\\fP`` pop from stack.
        # ``B`` bold, ``I`` italic, ``R`` roman should be available.
        # Hopefully ``C`` courier too.
        self.defs = {
                'indent' : ('.INDENT %.1f\n', '.UNINDENT\n'),
                'definition_list_item' : ('.TP', ''),
                'field_name' : ('.TP\n.B ', '\n'),
                'literal' : ('\\fB', '\\fP'),
                'literal_block' : ('.sp\n.nf\n.ft C\n', '\n.ft P\n.fi\n'),

                'option_list_item' : ('.TP\n', ''),

                'reference' : (r'\%', r'\:'),
                'emphasis': ('\\fI', '\\fP'),
                'strong' : ('\\fB', '\\fP'),
                'term' : ('\n.B ', '\n'),
                'title_reference' : ('\\fI', '\\fP'),

                'topic-title' : ('.SS ',),
                'sidebar-title' : ('.SS ',),

                'problematic' : ('\n.nf\n', '\n.fi\n'),
                    }
        # NOTE don't specify the newline before a dot-command, but ensure
        # it is there.

    def comment_begin(self, text):
        """Return commented version of the passed text WITHOUT end of
        line/comment."""
        prefix = '.\\" '
        out_text = ''.join(
            [(prefix + in_line + '\n')
            for in_line in text.split('\n')])
        return out_text

    def comment(self, text):
        """Return commented version of the passed text."""
        return self.comment_begin(text)+'.\n'

    def ensure_eol(self):
        """Ensure the last line in body is terminated by new line."""
        if self.body[-1][-1] != '\n':
            self.body.append('\n')

            self.head.append(self.header())
        # filter body
        for i in range(len(self.body) - 1, 0, -1):
            # remove superfluous vertical gaps.
            if self.body[i] == '.sp\n':
                if self.body[i - 1][:4] in ('.BI ','.IP '):
                    self.body[i] = '.\n'
                elif (self.body[i - 1][:3] == '.B ' and
                    self.body[i - 2][:4] == '.TP\n'):
                    self.body[i] = '.\n'
                elif (self.body[i - 1] == '\n' and
                    self.body[i - 2][0] != '.' and
                    (self.body[i - 3][:7] == '.TP\n.B '
                        or self.body[i - 3][:4] == '\n.B ')
                     ):
                    self.body[i] = '.\n'
        return ''.join(self.head + self.body + self.foot)

    def deunicode(self, text):
        text = text.replace(u'\xa0', '\\ ')
        text = text.replace(u'\u2020', '\\(dg')
        return text

    def visit_Text(self, node):
        text = node.astext()
        text = text.replace('\\','\\e')
        replace_pairs = [
            (u'-', u'\\-'),
            (u"'", u'\\(aq'),
            (u'´', u"\\'"),
            (u'`', u'\\(ga'),
            ]
        for (in_char, out_markup) in replace_pairs:
            text = text.replace(in_char, out_markup)
        # unicode
        text = self.deunicode(text)
        if self._in_literal:

        pass

    def list_start(self, node):
        class enum_char(object):
            enum_style = {
                    'bullet'     : '\\(bu',
                    'emdash'     : '\\(em',
                     }

            def __init__(self, style):
                self._style = style
                if 'start' in node:
                    self._cnt = node['start'] - 1

            next = __next__

            def get_width(self):
                return self._indent
            def __repr__(self):
                return 'enum_style-%s' % list(self._style)

        if 'enumtype' in node:
            self._list_char.append(enum_char(node['enumtype']))

    def list_end(self):
        self.dedent()
        self._list_char.pop()

    def header(self):
        tmpl = (".TH %(title_upper)s %(manual_section)s"
                " \"%(date)s\" \"%(version)s\" \"%(manual_group)s\"\n"
                ".SH NAME\n"
                "%(title)s \\- %(subtitle)s\n")
        return tmpl % self._docinfo

    def append_header(self):
        """append header with .TH and .SH NAME"""
        # NOTE before everything

    def depart_address(self, node):
        pass

    def visit_admonition(self, node, name=None):
        if name:
            self.body.append('.IP %s\n' %
                        self.language.labels.get(name, name))

    def depart_admonition(self, node):
        self.body.append('.RE\n')

    def visit_attention(self, node):

    def depart_citation(self, node):
        pass

    def visit_citation_reference(self, node):
        self.body.append('['+node.astext()+']')
        raise nodes.SkipNode()

    def visit_classifier(self, node):
        pass

    def depart_colspec(self, node):
        pass

    def write_colspecs(self):
        self.body.append("%s.\n" % ('L '*len(self.colspecs)))

    def visit_comment(self, node,
                      sub=re.compile('-(?=-)').sub):
        self.body.append(self.comment(node.astext()))
        raise nodes.SkipNode()

    def visit_contact(self, node):
        self.visit_docinfo_item(node, 'contact')

        self._in_literal = False
        self.body.append(self.defs['literal_block'][1])

    def visit_document(self, node):
        # no blank line between comment and header.
        self.body.append(self.comment(self.document_start).rstrip()+'\n')
        # writing header is postboned
        self.header_written = 0

    def depart_document(self, node):
        if self._docinfo['author']:
            self.body.append('.SH AUTHOR\n%s\n'
                    % ', '.join(self._docinfo['author']))
        skip = ('author', 'copyright', 'date',
                'manual_group', 'manual_section',
                'subtitle',
                'title', 'title_upper', 'version')
        for name in self._docinfo_keys:
            if name == 'address':
                self.body.append("\n%s:\n%s%s.nf\n%s\n.fi\n%s%s" % (
                                    self.language.labels.get(name, name),
                                    self.defs['indent'][0] % 0,
                                    self.defs['indent'][0] % BLOCKQOUTE_INDENT,
                                    self._docinfo[name],
                                    self.defs['indent'][1],
                                    self.defs['indent'][1]))
            elif name not in skip:
                if name in self._docinfo_names:
                    label = self._docinfo_names[name]
                else:
                    label = self.language.labels.get(name, name)
                self.body.append("\n%s: %s\n" % (label, self._docinfo[name]))
        if self._docinfo['copyright']:
            self.body.append('.SH COPYRIGHT\n%s\n'
                    % self._docinfo['copyright'])
        self.body.append(self.comment(
                        'Generated by docutils manpage writer.\n'))

    def visit_emphasis(self, node):
        self.body.append(self.defs['emphasis'][0])

    def depart_emphasis(self, node):
        self.body.append(self.defs['emphasis'][1])

    def visit_entry(self, node):
        # a cell in a table row
        if 'morerows' in node:
            self.document.reporter.warning('"table row spanning" not supported',
                    base_node=node)
        if 'morecols' in node:
            self.document.reporter.warning(
                    '"table cell spanning" not supported', base_node=node)
        self.context.append(len(self.body))

    def depart_entry(self, node):
        start = self.context.pop()
        self._active_table.append_cell(self.body[start:])

    def depart_field(self, node):
        pass

    def visit_field_body(self, node):
        if self._in_docinfo:
            name_normalized = self._field_name.lower().replace(" ","_")
            self._docinfo_names[name_normalized] = self._field_name
            self.visit_docinfo_item(node, name_normalized)
            raise nodes.SkipNode()

    def depart_field_body(self, node):

    def depart_figure(self, node):
        self.dedent()
        self.dedent()

    def visit_footer(self, node):
        self.document.reporter.warning('"footer" not supported',
                base_node=node)

    def depart_footer(self, node):
        pass

    def visit_footnote(self, node):

    def depart_footnote(self, node):
        pass

    def footnote_backrefs(self, node):
        self.document.reporter.warning('"footnote_backrefs" not supported',
                base_node=node)

    def visit_footnote_reference(self, node):
        self.body.append('['+self.deunicode(node.astext())+']')
        raise nodes.SkipNode()

    def depart_footnote_reference(self, node):
        pass

    def depart_attribution(self, node):
        self.body.append('\n')

    def visit_image(self, node):
        self.document.reporter.warning('"image" not supported',
                base_node=node)
        text = []
        if 'alt' in node.attributes:
            text.append(node.attributes['alt'])
        if 'uri' in node.attributes:
            text.append(node.attributes['uri'])

    depart_important = depart_admonition

    def visit_label(self, node):
        # footnote and citation
        if (isinstance(node.parent, nodes.footnote)
            or isinstance(node.parent, nodes.citation)):
            raise nodes.SkipNode()
        self.document.reporter.warning('"unsupported "label"',
                base_node=node)
        self.body.append('[')

    def depart_label(self, node):
        self.body.append(']\n')

    def depart_line(self, node):
        self.body.append('\n')

    def visit_list_item(self, node):
        # man 7 man argues to use ".IP" instead of ".TP"
        self.body.append('.IP %s %d\n' % (
                next(self._list_char[-1]),
                self._list_char[-1].get_width(),))

    def depart_list_item(self, node):
        pass

    def visit_literal(self, node):

        # as one option could have several forms it is a group
        # options without parameter bold only, .B, -v
        # options with parameter bold italic, .BI, -f file
        #
        # we do not know if .B or .BI
        self.context.append('.B')           # blind guess
        self.context.append(len(self.body)) # to be able to insert later
        self.context.append(0)              # option counter

    def depart_option_group(self, node):
        self.context.pop()  # the counter
        start_position = self.context.pop()
        text = self.body[start_position:]

    def depart_option_string(self, node):
        pass

    def visit_option_argument(self, node):
        self.context[-3] = '.BI' # bold/italic alternate
        if node['delimiter'] != ' ':
            self.body.append('\\fB%s ' % node['delimiter'])
        elif self.body[len(self.body) - 1].endswith('='):
            # a blank only means no blank in output, just changing font
            self.body.append(' ')

    def visit_substitution_definition(self, node):
        """Internal only."""
        raise nodes.SkipNode()

    def visit_substitution_reference(self, node):
        self.document.reporter.warning('"substitution_reference" not supported',
                base_node=node)

    def visit_subtitle(self, node):
        if isinstance(node.parent, nodes.sidebar):
            self.body.append(self.defs['strong'][0])
        elif isinstance(node.parent, nodes.document):

        elif isinstance(node.parent, nodes.section):
            self.body.append(self.defs['strong'][0])

    def depart_subtitle(self, node):
        # document subtitle calls SkipNode
        self.body.append(self.defs['strong'][1]+'\n.PP\n')

    def visit_system_message(self, node):
        # TODO add report_level
        #if node['level'] < self.document.reporter['writer'].report_level:
        #    Level is too low to display:
        #    raise nodes.SkipNode
        attr = {}
        if node.hasattr('id'):
            attr['name'] = node['id']
        if node.hasattr('line'):
            line = ', line %s' % node['line']
        else:
            line = ''
        self.body.append('.IP "System Message: %s/%s (%s:%s)"\n'
                         % (node['type'], node['level'], node['source'], line))

    def depart_system_message(self, node):
        pass

    def visit_table(self, node):

        self.visit_admonition(node, 'warning')

    depart_warning = depart_admonition

    def unimplemented_visit(self, node):
        raise NotImplementedError('visiting unimplemented node type: %s'
                                  % node.__class__.__name__)

# vim: set fileencoding=utf-8 et ts=4 ai :

43076:2372284d9457

from docutils import (
    languages,
    nodes,
    writers,
)

try:
    import roman
except ImportError:
    from docutils.utils import roman

OPTION_LIST_INDENT = 7
BLOCKQOUTE_INDENT = 3.5

# Define two macros so man/roff can calculate the
# indent/unindent margins by itself
MACRO_DEF = r""".
.nr rst2man-indent-level 0
.
.de1 rstReportMargin
\\$1 \\n[an-margin]
level \\n[rst2man-indent-level]

.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
.nr rst2man-indent-level -1
.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
..
"""


class Writer(writers.Writer):

    supported = 'manpage'
    """Formats this writer supports."""

    output = None
    """Final translated form of `document`."""

    def __init__(self):
        self._rows = []
        self._options = ['center']
        self._tab_char = '\t'
        self._coldefs = []

    def new_row(self):
        self._rows.append([])

    def append_separator(self, separator):
        """Append the separator for table head."""
        self._rows.append([separator])

    def append_cell(self, cell_lines):
        """cell_lines is an array of lines"""
        start = 0
        if len(cell_lines) > 0 and cell_lines[0] == '.sp\n':
            start = 1
        self._rows[-1].append(cell_lines[start:])
        if len(self._coldefs) < len(self._rows[-1]):
            self._coldefs.append('l')

    def _minimize_cell(self, cell_lines):
        """Remove leading and trailing blank and ``.sp`` lines"""
        while cell_lines and cell_lines[0] in ('\n', '.sp\n'):
            del cell_lines[0]
        while cell_lines and cell_lines[-1] in ('\n', '.sp\n'):
            del cell_lines[-1]

    def as_list(self):
        text = ['.TS\n']
        text.append(' '.join(self._options) + ';\n')
        text.append('|%s|.\n' % ('|'.join(self._coldefs)))
        for row in self._rows:
            # row = array of cells. cell = array of lines.
            text.append('_\n')  # line above
            text.append('T{\n')
            for i in range(len(row)):
                cell = row[i]
                self._minimize_cell(cell)
                text.extend(cell)
                if not text[-1].endswith('\n'):
                    text[-1] += '\n'
                if i < len(row) - 1:
                    text.append('T}' + self._tab_char + 'T{\n')
                else:
                    text.append('T}\n')
        text.append('_\n')
        text.append('.TE\n')
        return text


class Translator(nodes.NodeVisitor):
    """"""

    words_and_spaces = re.compile(r'\S+| +|\n')

        nodes.NodeVisitor.__init__(self, document)
        self.settings = settings = document.settings
        lcode = settings.language_code
        arglen = len(inspect.getargspec(languages.get_language)[0])
        if arglen == 2:
            self.language = languages.get_language(
                lcode, self.document.reporter
            )
        else:
            self.language = languages.get_language(lcode)
        self.head = []
        self.body = []
        self.foot = []

        # the list style "*" bullet or "#" numbered
        self._list_char = []
        # writing the header .TH and .SH NAME is postboned after
        # docinfo.
        self._docinfo = {
            "title": "",
            "title_upper": "",
            "subtitle": "",
            "manual_section": "",
            "manual_group": "",
            "author": [],
            "date": "",
            "copyright": "",
            "version": "",
        }
        self._docinfo_keys = []  # a list to keep the sequence as in source.
        self._docinfo_names = {}  # to get name from text not normalized.
        self._in_docinfo = None
        self._active_table = None
        self._in_literal = False
        self.header_written = 0
        self._line_block = 0

        # Fonts are put on a stack, the top one is used.
        # ``.ft P`` or ``\\fP`` pop from stack.
        # ``B`` bold, ``I`` italic, ``R`` roman should be available.
        # Hopefully ``C`` courier too.
        self.defs = {
            'indent': ('.INDENT %.1f\n', '.UNINDENT\n'),
            'definition_list_item': ('.TP', ''),
            'field_name': ('.TP\n.B ', '\n'),
            'literal': ('\\fB', '\\fP'),
            'literal_block': ('.sp\n.nf\n.ft C\n', '\n.ft P\n.fi\n'),
            'option_list_item': ('.TP\n', ''),
            'reference': (r'\%', r'\:'),
            'emphasis': ('\\fI', '\\fP'),
            'strong': ('\\fB', '\\fP'),
            'term': ('\n.B ', '\n'),
            'title_reference': ('\\fI', '\\fP'),
            'topic-title': ('.SS ',),
            'sidebar-title': ('.SS ',),
            'problematic': ('\n.nf\n', '\n.fi\n'),
        }
        # NOTE don't specify the newline before a dot-command, but ensure
        # it is there.

    def comment_begin(self, text):
        """Return commented version of the passed text WITHOUT end of
        line/comment."""
        prefix = '.\\" '
        out_text = ''.join(
            [(prefix + in_line + '\n') for in_line in text.split('\n')]
        )
        return out_text

    def comment(self, text):
        """Return commented version of the passed text."""
        return self.comment_begin(text) + '.\n'

    def ensure_eol(self):
        """Ensure the last line in body is terminated by new line."""
        if self.body[-1][-1] != '\n':
            self.body.append('\n')

            self.head.append(self.header())
        # filter body
        for i in range(len(self.body) - 1, 0, -1):
            # remove superfluous vertical gaps.
            if self.body[i] == '.sp\n':
                if self.body[i - 1][:4] in ('.BI ', '.IP '):
                    self.body[i] = '.\n'
                elif (
                    self.body[i - 1][:3] == '.B '
                    and self.body[i - 2][:4] == '.TP\n'
                ):
                    self.body[i] = '.\n'
                elif (
                    self.body[i - 1] == '\n'
                    and self.body[i - 2][0] != '.'
                    and (
                        self.body[i - 3][:7] == '.TP\n.B '
                        or self.body[i - 3][:4] == '\n.B '
                    )
                ):
                    self.body[i] = '.\n'
        return ''.join(self.head + self.body + self.foot)

    def deunicode(self, text):
        text = text.replace(u'\xa0', '\\ ')
        text = text.replace(u'\u2020', '\\(dg')
        return text

    def visit_Text(self, node):
        text = node.astext()
        text = text.replace('\\', '\\e')
        replace_pairs = [
            (u'-', u'\\-'),
            (u"'", u'\\(aq'),
            (u'´', u"\\'"),
            (u'`', u'\\(ga'),
        ]
        for (in_char, out_markup) in replace_pairs:
            text = text.replace(in_char, out_markup)
        # unicode
        text = self.deunicode(text)
        if self._in_literal:

        pass

    def list_start(self, node):
        class enum_char(object):
            enum_style = {
                'bullet': '\\(bu',
                'emdash': '\\(em',
            }

            def __init__(self, style):
                self._style = style
                if 'start' in node:
                    self._cnt = node['start'] - 1

            next = __next__

            def get_width(self):
                return self._indent

            def __repr__(self):
                return 'enum_style-%s' % list(self._style)

        if 'enumtype' in node:
            self._list_char.append(enum_char(node['enumtype']))

    def list_end(self):
        self.dedent()
        self._list_char.pop()

    def header(self):
        tmpl = (
            ".TH %(title_upper)s %(manual_section)s"
            " \"%(date)s\" \"%(version)s\" \"%(manual_group)s\"\n"
            ".SH NAME\n"
            "%(title)s \\- %(subtitle)s\n"
        )
        return tmpl % self._docinfo

    def append_header(self):
        """append header with .TH and .SH NAME"""
        # NOTE before everything

    def depart_address(self, node):
        pass

    def visit_admonition(self, node, name=None):
        if name:
            self.body.append('.IP %s\n' % self.language.labels.get(name, name))

    def depart_admonition(self, node):
        self.body.append('.RE\n')

    def visit_attention(self, node):

    def depart_citation(self, node):
        pass

    def visit_citation_reference(self, node):
        self.body.append('[' + node.astext() + ']')
        raise nodes.SkipNode()

    def visit_classifier(self, node):
        pass

    def depart_colspec(self, node):
        pass

    def write_colspecs(self):
        self.body.append("%s.\n" % ('L ' * len(self.colspecs)))

    def visit_comment(self, node, sub=re.compile('-(?=-)').sub):
        self.body.append(self.comment(node.astext()))
        raise nodes.SkipNode()

    def visit_contact(self, node):
        self.visit_docinfo_item(node, 'contact')

        self._in_literal = False
        self.body.append(self.defs['literal_block'][1])

    def visit_document(self, node):
        # no blank line between comment and header.
        self.body.append(self.comment(self.document_start).rstrip() + '\n')
        # writing header is postboned
        self.header_written = 0

    def depart_document(self, node):
        if self._docinfo['author']:
            self.body.append(
                '.SH AUTHOR\n%s\n' % ', '.join(self._docinfo['author'])
            )
        skip = (
            'author',
            'copyright',
            'date',
            'manual_group',
            'manual_section',
            'subtitle',
            'title',
            'title_upper',
            'version',
        )
        for name in self._docinfo_keys:
            if name == 'address':
                self.body.append(
                    "\n%s:\n%s%s.nf\n%s\n.fi\n%s%s"
                    % (
                        self.language.labels.get(name, name),
                        self.defs['indent'][0] % 0,
                        self.defs['indent'][0] % BLOCKQOUTE_INDENT,
                        self._docinfo[name],
                        self.defs['indent'][1],
                        self.defs['indent'][1],
                    )
                )
            elif name not in skip:
                if name in self._docinfo_names:
                    label = self._docinfo_names[name]
                else:
                    label = self.language.labels.get(name, name)
                self.body.append("\n%s: %s\n" % (label, self._docinfo[name]))
        if self._docinfo['copyright']:
            self.body.append('.SH COPYRIGHT\n%s\n' % self._docinfo['copyright'])
        self.body.append(
            self.comment('Generated by docutils manpage writer.\n')
        )

    def visit_emphasis(self, node):
        self.body.append(self.defs['emphasis'][0])

    def depart_emphasis(self, node):
        self.body.append(self.defs['emphasis'][1])

    def visit_entry(self, node):
        # a cell in a table row
        if 'morerows' in node:
            self.document.reporter.warning(
                '"table row spanning" not supported', base_node=node
            )
        if 'morecols' in node:
            self.document.reporter.warning(
                '"table cell spanning" not supported', base_node=node
            )
        self.context.append(len(self.body))

    def depart_entry(self, node):
        start = self.context.pop()
        self._active_table.append_cell(self.body[start:])

    def depart_field(self, node):
        pass

    def visit_field_body(self, node):
        if self._in_docinfo:
            name_normalized = self._field_name.lower().replace(" ", "_")
            self._docinfo_names[name_normalized] = self._field_name
            self.visit_docinfo_item(node, name_normalized)
            raise nodes.SkipNode()

    def depart_field_body(self, node):

    def depart_figure(self, node):
        self.dedent()
        self.dedent()

    def visit_footer(self, node):
        self.document.reporter.warning('"footer" not supported', base_node=node)

    def depart_footer(self, node):
        pass

    def visit_footnote(self, node):

    def depart_footnote(self, node):
        pass

    def footnote_backrefs(self, node):
        self.document.reporter.warning(
            '"footnote_backrefs" not supported', base_node=node
        )

    def visit_footnote_reference(self, node):
        self.body.append('[' + self.deunicode(node.astext()) + ']')
        raise nodes.SkipNode()

    def depart_footnote_reference(self, node):
        pass

    def depart_attribution(self, node):
        self.body.append('\n')

    def visit_image(self, node):
        self.document.reporter.warning('"image" not supported', base_node=node)
        text = []
        if 'alt' in node.attributes:
            text.append(node.attributes['alt'])
        if 'uri' in node.attributes:
            text.append(node.attributes['uri'])

    depart_important = depart_admonition

    def visit_label(self, node):
        # footnote and citation
        if isinstance(node.parent, nodes.footnote) or isinstance(
            node.parent, nodes.citation
        ):
            raise nodes.SkipNode()
        self.document.reporter.warning('"unsupported "label"', base_node=node)
        self.body.append('[')

    def depart_label(self, node):
        self.body.append(']\n')

    def depart_line(self, node):
        self.body.append('\n')

    def visit_list_item(self, node):
        # man 7 man argues to use ".IP" instead of ".TP"
        self.body.append(
            '.IP %s %d\n'
            % (next(self._list_char[-1]), self._list_char[-1].get_width(),)
        )

    def depart_list_item(self, node):
        pass

    def visit_literal(self, node):

        # as one option could have several forms it is a group
        # options without parameter bold only, .B, -v
        # options with parameter bold italic, .BI, -f file
        #
        # we do not know if .B or .BI
        self.context.append('.B')  # blind guess
        self.context.append(len(self.body))  # to be able to insert later
        self.context.append(0)  # option counter

    def depart_option_group(self, node):
        self.context.pop()  # the counter
        start_position = self.context.pop()
        text = self.body[start_position:]

    def depart_option_string(self, node):
        pass

    def visit_option_argument(self, node):
        self.context[-3] = '.BI'  # bold/italic alternate
        if node['delimiter'] != ' ':
            self.body.append('\\fB%s ' % node['delimiter'])
        elif self.body[len(self.body) - 1].endswith('='):
            # a blank only means no blank in output, just changing font
            self.body.append(' ')

    def visit_substitution_definition(self, node):
        """Internal only."""
        raise nodes.SkipNode()

    def visit_substitution_reference(self, node):
        self.document.reporter.warning(
            '"substitution_reference" not supported', base_node=node
        )

    def visit_subtitle(self, node):
        if isinstance(node.parent, nodes.sidebar):
            self.body.append(self.defs['strong'][0])
        elif isinstance(node.parent, nodes.document):

        elif isinstance(node.parent, nodes.section):
            self.body.append(self.defs['strong'][0])

    def depart_subtitle(self, node):
        # document subtitle calls SkipNode
        self.body.append(self.defs['strong'][1] + '\n.PP\n')

    def visit_system_message(self, node):
        # TODO add report_level
        # if node['level'] < self.document.reporter['writer'].report_level:
        #    Level is too low to display:
        #    raise nodes.SkipNode
        attr = {}
        if node.hasattr('id'):
            attr['name'] = node['id']
        if node.hasattr('line'):
            line = ', line %s' % node['line']
        else:
            line = ''
        self.body.append(
            '.IP "System Message: %s/%s (%s:%s)"\n'
            % (node['type'], node['level'], node['source'], line)
        )

    def depart_system_message(self, node):
        pass

    def visit_table(self, node):

        self.visit_admonition(node, 'warning')

    depart_warning = depart_admonition

    def unimplemented_visit(self, node):
        raise NotImplementedError(
            'visiting unimplemented node type: %s' % node.__class__.__name__
        )


# vim: set fileencoding=utf-8 et ts=4 ai :