--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/planemo/lib/python3.7/site-packages/docutils/parsers/rst/directives/tables.py	Fri Jul 31 00:18:57 2020 -0400
@@ -0,0 +1,513 @@
+# $Id: tables.py 8377 2019-08-27 19:49:45Z milde $
+# Authors: David Goodger <goodger@python.org>; David Priest
+# Copyright: This module has been placed in the public domain.
+
+"""
+Directives for table elements.
+"""
+
+__docformat__ = 'reStructuredText'
+
+
+import sys
+import os.path
+import csv
+
+from docutils import io, nodes, statemachine, utils
+from docutils.utils.error_reporting import SafeString
+from docutils.utils import SystemMessagePropagation
+from docutils.parsers.rst import Directive
+from docutils.parsers.rst import directives
+
+
+def align(argument):
+    return directives.choice(argument, ('left', 'center', 'right'))
+
+
+class Table(Directive):
+
+    """
+    Generic table base class.
+    """
+
+    optional_arguments = 1
+    final_argument_whitespace = True
+    option_spec = {'class': directives.class_option,
+                   'name': directives.unchanged,
+                   'align': align,
+                   'width': directives.length_or_percentage_or_unitless,
+                   'widths': directives.value_or(('auto', 'grid'),
+                                                 directives.positive_int_list)}
+    has_content = True
+
+    def make_title(self):
+        if self.arguments:
+            title_text = self.arguments[0]
+            text_nodes, messages = self.state.inline_text(title_text,
+                                                          self.lineno)
+            title = nodes.title(title_text, '', *text_nodes)
+            (title.source,
+             title.line) = self.state_machine.get_source_and_line(self.lineno)
+        else:
+            title = None
+            messages = []
+        return title, messages
+
+    def process_header_option(self):
+        source = self.state_machine.get_source(self.lineno - 1)
+        table_head = []
+        max_header_cols = 0
+        if 'header' in self.options:   # separate table header in option
+            rows, max_header_cols = self.parse_csv_data_into_rows(
+                self.options['header'].split('\n'), self.HeaderDialect(),
+                source)
+            table_head.extend(rows)
+        return table_head, max_header_cols
+
+    def check_table_dimensions(self, rows, header_rows, stub_columns):
+        if len(rows) < header_rows:
+            error = self.state_machine.reporter.error(
+                '%s header row(s) specified but only %s row(s) of data '
+                'supplied ("%s" directive).'
+                % (header_rows, len(rows), self.name), nodes.literal_block(
+                self.block_text, self.block_text), line=self.lineno)
+            raise SystemMessagePropagation(error)
+        if len(rows) == header_rows > 0:
+            error = self.state_machine.reporter.error(
+                'Insufficient data supplied (%s row(s)); no data remaining '
+                'for table body, required by "%s" directive.'
+                % (len(rows), self.name), nodes.literal_block(
+                self.block_text, self.block_text), line=self.lineno)
+            raise SystemMessagePropagation(error)
+        for row in rows:
+            if len(row) < stub_columns:
+                error = self.state_machine.reporter.error(
+                    '%s stub column(s) specified but only %s columns(s) of '
+                    'data supplied ("%s" directive).' %
+                    (stub_columns, len(row), self.name), nodes.literal_block(
+                    self.block_text, self.block_text), line=self.lineno)
+                raise SystemMessagePropagation(error)
+            if len(row) == stub_columns > 0:
+                error = self.state_machine.reporter.error(
+                    'Insufficient data supplied (%s columns(s)); no data remaining '
+                    'for table body, required by "%s" directive.'
+                    % (len(row), self.name), nodes.literal_block(
+                    self.block_text, self.block_text), line=self.lineno)
+                raise SystemMessagePropagation(error)
+
+    def set_table_width(self, table_node):
+        if 'width' in self.options:
+            table_node['width'] = self.options.get('width')
+
+    @property
+    def widths(self):
+        return self.options.get('widths', '')
+
+    def get_column_widths(self, max_cols):
+        if isinstance(self.widths, list):
+            if len(self.widths) != max_cols:
+                error = self.state_machine.reporter.error(
+                    '"%s" widths do not match the number of columns in table '
+                    '(%s).' % (self.name, max_cols), nodes.literal_block(
+                    self.block_text, self.block_text), line=self.lineno)
+                raise SystemMessagePropagation(error)
+            col_widths = self.widths
+        elif max_cols:
+            col_widths = [100 // max_cols] * max_cols
+        else:
+            error = self.state_machine.reporter.error(
+                'No table data detected in CSV file.', nodes.literal_block(
+                self.block_text, self.block_text), line=self.lineno)
+            raise SystemMessagePropagation(error)
+        return col_widths
+
+    def extend_short_rows_with_empty_cells(self, columns, parts):
+        for part in parts:
+            for row in part:
+                if len(row) < columns:
+                    row.extend([(0, 0, 0, [])] * (columns - len(row)))
+
+
+class RSTTable(Table):
+
+    def run(self):
+        if not self.content:
+            warning = self.state_machine.reporter.warning(
+                'Content block expected for the "%s" directive; none found.'
+                % self.name, nodes.literal_block(
+                self.block_text, self.block_text), line=self.lineno)
+            return [warning]
+        title, messages = self.make_title()
+        node = nodes.Element()          # anonymous container for parsing
+        self.state.nested_parse(self.content, self.content_offset, node)
+        if len(node) != 1 or not isinstance(node[0], nodes.table):
+            error = self.state_machine.reporter.error(
+                'Error parsing content block for the "%s" directive: exactly '
+                'one table expected.' % self.name, nodes.literal_block(
+                self.block_text, self.block_text), line=self.lineno)
+            return [error]
+        table_node = node[0]
+        table_node['classes'] += self.options.get('class', [])
+        self.set_table_width(table_node)
+        if 'align' in self.options:
+            table_node['align'] = self.options.get('align')
+        tgroup = table_node[0]
+        if isinstance(self.widths, list):
+            colspecs = [child for child in tgroup.children
+                        if child.tagname == 'colspec']
+            for colspec, col_width in zip(colspecs, self.widths):
+                colspec['colwidth'] = col_width
+        # @@@ the colwidths argument for <tgroup> is not part of the
+        # XML Exchange Table spec (https://www.oasis-open.org/specs/tm9901.htm)
+        # and hence violates the docutils.dtd.
+        if self.widths == 'auto':
+            table_node['classes'] += ['colwidths-auto']
+        elif self.widths: # "grid" or list of integers
+            table_node['classes'] += ['colwidths-given']
+        self.add_name(table_node)
+        if title:
+            table_node.insert(0, title)
+        return [table_node] + messages
+
+
+class CSVTable(Table):
+
+    option_spec = {'header-rows': directives.nonnegative_int,
+                   'stub-columns': directives.nonnegative_int,
+                   'header': directives.unchanged,
+                   'width': directives.length_or_percentage_or_unitless,
+                   'widths': directives.value_or(('auto', ),
+                                                 directives.positive_int_list),
+                   'file': directives.path,
+                   'url': directives.uri,
+                   'encoding': directives.encoding,
+                   'class': directives.class_option,
+                   'name': directives.unchanged,
+                   'align': align,
+                   # field delimiter char
+                   'delim': directives.single_char_or_whitespace_or_unicode,
+                   # treat whitespace after delimiter as significant
+                   'keepspace': directives.flag,
+                   # text field quote/unquote char:
+                   'quote': directives.single_char_or_unicode,
+                   # char used to escape delim & quote as-needed:
+                   'escape': directives.single_char_or_unicode,}
+
+    class DocutilsDialect(csv.Dialect):
+
+        """CSV dialect for `csv_table` directive."""
+
+        delimiter = ','
+        quotechar = '"'
+        doublequote = True
+        skipinitialspace = True
+        strict = True
+        lineterminator = '\n'
+        quoting = csv.QUOTE_MINIMAL
+
+        def __init__(self, options):
+            if 'delim' in options:
+                self.delimiter = CSVTable.encode_for_csv(options['delim'])
+            if 'keepspace' in options:
+                self.skipinitialspace = False
+            if 'quote' in options:
+                self.quotechar = CSVTable.encode_for_csv(options['quote'])
+            if 'escape' in options:
+                self.doublequote = False
+                self.escapechar = CSVTable.encode_for_csv(options['escape'])
+            csv.Dialect.__init__(self)
+
+
+    class HeaderDialect(csv.Dialect):
+
+        """CSV dialect to use for the "header" option data."""
+
+        delimiter = ','
+        quotechar = '"'
+        escapechar = '\\'
+        doublequote = False
+        skipinitialspace = True
+        strict = True
+        lineterminator = '\n'
+        quoting = csv.QUOTE_MINIMAL
+
+    def check_requirements(self):
+        pass
+
+    def run(self):
+        try:
+            if (not self.state.document.settings.file_insertion_enabled
+                and ('file' in self.options
+                     or 'url' in self.options)):
+                warning = self.state_machine.reporter.warning(
+                    'File and URL access deactivated; ignoring "%s" '
+                    'directive.' % self.name, nodes.literal_block(
+                    self.block_text, self.block_text), line=self.lineno)
+                return [warning]
+            self.check_requirements()
+            title, messages = self.make_title()
+            csv_data, source = self.get_csv_data()
+            table_head, max_header_cols = self.process_header_option()
+            rows, max_cols = self.parse_csv_data_into_rows(
+                csv_data, self.DocutilsDialect(self.options), source)
+            max_cols = max(max_cols, max_header_cols)
+            header_rows = self.options.get('header-rows', 0)
+            stub_columns = self.options.get('stub-columns', 0)
+            self.check_table_dimensions(rows, header_rows, stub_columns)
+            table_head.extend(rows[:header_rows])
+            table_body = rows[header_rows:]
+            col_widths = self.get_column_widths(max_cols)
+            self.extend_short_rows_with_empty_cells(max_cols,
+                                                    (table_head, table_body))
+        except SystemMessagePropagation as detail:
+            return [detail.args[0]]
+        except csv.Error as detail:
+            message = str(detail)
+            if sys.version_info < (3, 0) and '1-character string' in message:
+                message += '\nwith Python 2.x this must be an ASCII character.'
+            error = self.state_machine.reporter.error(
+                'Error with CSV data in "%s" directive:\n%s'
+                % (self.name, message), nodes.literal_block(
+                self.block_text, self.block_text), line=self.lineno)
+            return [error]
+        table = (col_widths, table_head, table_body)
+        table_node = self.state.build_table(table, self.content_offset,
+                                            stub_columns, widths=self.widths)
+        table_node['classes'] += self.options.get('class', [])
+        if 'align' in self.options:
+            table_node['align'] = self.options.get('align')
+        self.set_table_width(table_node)
+        self.add_name(table_node)
+        if title:
+            table_node.insert(0, title)
+        return [table_node] + messages
+
+    def get_csv_data(self):
+        """
+        Get CSV data from the directive content, from an external
+        file, or from a URL reference.
+        """
+        encoding = self.options.get(
+            'encoding', self.state.document.settings.input_encoding)
+        error_handler = self.state.document.settings.input_encoding_error_handler
+        if self.content:
+            # CSV data is from directive content.
+            if 'file' in self.options or 'url' in self.options:
+                error = self.state_machine.reporter.error(
+                    '"%s" directive may not both specify an external file and'
+                    ' have content.' % self.name, nodes.literal_block(
+                    self.block_text, self.block_text), line=self.lineno)
+                raise SystemMessagePropagation(error)
+            source = self.content.source(0)
+            csv_data = self.content
+        elif 'file' in self.options:
+            # CSV data is from an external file.
+            if 'url' in self.options:
+                error = self.state_machine.reporter.error(
+                      'The "file" and "url" options may not be simultaneously'
+                      ' specified for the "%s" directive.' % self.name,
+                      nodes.literal_block(self.block_text, self.block_text),
+                      line=self.lineno)
+                raise SystemMessagePropagation(error)
+            source_dir = os.path.dirname(
+                os.path.abspath(self.state.document.current_source))
+            source = os.path.normpath(os.path.join(source_dir,
+                                                   self.options['file']))
+            source = utils.relative_path(None, source)
+            try:
+                self.state.document.settings.record_dependencies.add(source)
+                csv_file = io.FileInput(source_path=source,
+                                        encoding=encoding,
+                                        error_handler=error_handler)
+                csv_data = csv_file.read().splitlines()
+            except IOError as error:
+                severe = self.state_machine.reporter.severe(
+                    u'Problems with "%s" directive path:\n%s.'
+                    % (self.name, SafeString(error)),
+                    nodes.literal_block(self.block_text, self.block_text),
+                    line=self.lineno)
+                raise SystemMessagePropagation(severe)
+        elif 'url' in self.options:
+            # CSV data is from a URL.
+            # Do not import urllib2 at the top of the module because
+            # it may fail due to broken SSL dependencies, and it takes
+            # about 0.15 seconds to load.
+            if sys.version_info >= (3, 0):
+                from urllib.request import urlopen
+                from urllib.error import URLError
+            else:
+                from urllib2 import urlopen, URLError
+
+            source = self.options['url']
+            try:
+                csv_text = urlopen(source).read()
+            except (URLError, IOError, OSError, ValueError) as error:
+                severe = self.state_machine.reporter.severe(
+                      'Problems with "%s" directive URL "%s":\n%s.'
+                      % (self.name, self.options['url'], SafeString(error)),
+                      nodes.literal_block(self.block_text, self.block_text),
+                      line=self.lineno)
+                raise SystemMessagePropagation(severe)
+            csv_file = io.StringInput(
+                source=csv_text, source_path=source, encoding=encoding,
+                error_handler=(self.state.document.settings.\
+                               input_encoding_error_handler))
+            csv_data = csv_file.read().splitlines()
+        else:
+            error = self.state_machine.reporter.warning(
+                'The "%s" directive requires content; none supplied.'
+                % self.name, nodes.literal_block(
+                self.block_text, self.block_text), line=self.lineno)
+            raise SystemMessagePropagation(error)
+        return csv_data, source
+
+    if sys.version_info < (3, 0):
+        # 2.x csv module doesn't do Unicode
+        def decode_from_csv(s):
+            return s.decode('utf-8')
+        def encode_for_csv(s):
+            return s.encode('utf-8')
+    else:
+        def decode_from_csv(s):
+            return s
+        def encode_for_csv(s):
+            return s
+    decode_from_csv = staticmethod(decode_from_csv)
+    encode_for_csv = staticmethod(encode_for_csv)
+
+    def parse_csv_data_into_rows(self, csv_data, dialect, source):
+        # csv.py doesn't do Unicode; encode temporarily as UTF-8
+        csv_reader = csv.reader([self.encode_for_csv(line + '\n')
+                                 for line in csv_data],
+                                dialect=dialect)
+        rows = []
+        max_cols = 0
+        for row in csv_reader:
+            row_data = []
+            for cell in row:
+                # decode UTF-8 back to Unicode
+                cell_text = self.decode_from_csv(cell)
+                cell_data = (0, 0, 0, statemachine.StringList(
+                    cell_text.splitlines(), source=source))
+                row_data.append(cell_data)
+            rows.append(row_data)
+            max_cols = max(max_cols, len(row))
+        return rows, max_cols
+
+
+class ListTable(Table):
+
+    """
+    Implement tables whose data is encoded as a uniform two-level bullet list.
+    For further ideas, see
+    http://docutils.sf.net/docs/dev/rst/alternatives.html#list-driven-tables
+    """
+
+    option_spec = {'header-rows': directives.nonnegative_int,
+                   'stub-columns': directives.nonnegative_int,
+                   'width': directives.length_or_percentage_or_unitless,
+                   'widths': directives.value_or(('auto', ),
+                                                 directives.positive_int_list),
+                   'class': directives.class_option,
+                   'name': directives.unchanged,
+                   'align': align}
+
+    def run(self):
+        if not self.content:
+            error = self.state_machine.reporter.error(
+                'The "%s" directive is empty; content required.' % self.name,
+                nodes.literal_block(self.block_text, self.block_text),
+                line=self.lineno)
+            return [error]
+        title, messages = self.make_title()
+        node = nodes.Element()          # anonymous container for parsing
+        self.state.nested_parse(self.content, self.content_offset, node)
+        try:
+            num_cols, col_widths = self.check_list_content(node)
+            table_data = [[item.children for item in row_list[0]]
+                          for row_list in node[0]]
+            header_rows = self.options.get('header-rows', 0)
+            stub_columns = self.options.get('stub-columns', 0)
+            self.check_table_dimensions(table_data, header_rows, stub_columns)
+        except SystemMessagePropagation as detail:
+            return [detail.args[0]]
+        table_node = self.build_table_from_list(table_data, col_widths,
+                                                header_rows, stub_columns)
+        if 'align' in self.options:
+            table_node['align'] = self.options.get('align')
+        table_node['classes'] += self.options.get('class', [])
+        self.set_table_width(table_node)
+        self.add_name(table_node)
+        if title:
+            table_node.insert(0, title)
+        return [table_node] + messages
+
+    def check_list_content(self, node):
+        if len(node) != 1 or not isinstance(node[0], nodes.bullet_list):
+            error = self.state_machine.reporter.error(
+                'Error parsing content block for the "%s" directive: '
+                'exactly one bullet list expected.' % self.name,
+                nodes.literal_block(self.block_text, self.block_text),
+                line=self.lineno)
+            raise SystemMessagePropagation(error)
+        list_node = node[0]
+        num_cols = 0
+        # Check for a uniform two-level bullet list:
+        for item_index in range(len(list_node)):
+            item = list_node[item_index]
+            if len(item) != 1 or not isinstance(item[0], nodes.bullet_list):
+                error = self.state_machine.reporter.error(
+                    'Error parsing content block for the "%s" directive: '
+                    'two-level bullet list expected, but row %s does not '
+                    'contain a second-level bullet list.'
+                    % (self.name, item_index + 1), nodes.literal_block(
+                    self.block_text, self.block_text), line=self.lineno)
+                raise SystemMessagePropagation(error)
+            elif item_index:
+                if len(item[0]) != num_cols:
+                    error = self.state_machine.reporter.error(
+                        'Error parsing content block for the "%s" directive: '
+                        'uniform two-level bullet list expected, but row %s '
+                        'does not contain the same number of items as row 1 '
+                        '(%s vs %s).'
+                        % (self.name, item_index + 1, len(item[0]), num_cols),
+                        nodes.literal_block(self.block_text, self.block_text),
+                        line=self.lineno)
+                    raise SystemMessagePropagation(error)
+            else:
+                num_cols = len(item[0])
+        col_widths = self.get_column_widths(num_cols)
+        return num_cols, col_widths
+
+    def build_table_from_list(self, table_data, col_widths, header_rows, stub_columns):
+        table = nodes.table()
+        if self.widths == 'auto':
+            table['classes'] += ['colwidths-auto']
+        elif self.widths: # "grid" or list of integers
+            table['classes'] += ['colwidths-given']
+        tgroup = nodes.tgroup(cols=len(col_widths))
+        table += tgroup
+        for col_width in col_widths:
+            colspec = nodes.colspec()
+            if col_width is not None:
+                colspec.attributes['colwidth'] = col_width
+            if stub_columns:
+                colspec.attributes['stub'] = 1
+                stub_columns -= 1
+            tgroup += colspec
+        rows = []
+        for row in table_data:
+            row_node = nodes.row()
+            for cell in row:
+                entry = nodes.entry()
+                entry += cell
+                row_node += entry
+            rows.append(row_node)
+        if header_rows:
+            thead = nodes.thead()
+            thead.extend(rows[:header_rows])
+            tgroup += thead
+        tbody = nodes.tbody()
+        tbody.extend(rows[header_rows:])
+        tgroup += tbody
+        return table