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📁 ..
📄 __init__.py(14.31 KB)
📁 __pycache__
📄 admonitions.py(2.35 KB)
📄 body.py(9.65 KB)
📄 html.py(695 B)
📄 images.py(6.64 KB)
📄 misc.py(25.69 KB)
📄 parts.py(4.15 KB)
📄 references.py(831 B)
📄 tables.py(23.27 KB)

Editing: images.py

# $Id: images.py 9037 2022-03-05 23:31:10Z milde $
# Author: David Goodger <goodger@python.org>
# Copyright: This module has been placed in the public domain.

"""
Directives for figures and simple images.
"""

__docformat__ = 'reStructuredText'

from urllib.request import url2pathname

try:  # check for the Python Imaging Library
    import PIL.Image
except ImportError:
    try:  # sometimes PIL modules are put in PYTHONPATH's root
        import Image
        class PIL: pass  # noqa:E701  dummy wrapper
        PIL.Image = Image
    except ImportError:
        PIL = None

from docutils import nodes
from docutils.nodes import fully_normalize_name, whitespace_normalize_name
from docutils.parsers.rst import Directive
from docutils.parsers.rst import directives, states
from docutils.parsers.rst.roles import set_classes

class Image(Directive):

align_h_values = ('left', 'center', 'right')
    align_v_values = ('top', 'middle', 'bottom')
    align_values = align_v_values + align_h_values

def align(argument):
        # This is not callable as self.align.  We cannot make it a
        # staticmethod because we're saving an unbound method in
        # option_spec below.
        return directives.choice(argument, Image.align_values)

required_arguments = 1
    optional_arguments = 0
    final_argument_whitespace = True
    option_spec = {'alt': directives.unchanged,
                   'height': directives.length_or_unitless,
                   'width': directives.length_or_percentage_or_unitless,
                   'scale': directives.percentage,
                   'align': align,
                   'target': directives.unchanged_required,
                   'class': directives.class_option,
                   'name': directives.unchanged}

def run(self):
        if 'align' in self.options:
            if isinstance(self.state, states.SubstitutionDef):
                # Check for align_v_values.
                if self.options['align'] not in self.align_v_values:
                    raise self.error(
                        'Error in "%s" directive: "%s" is not a valid value '
                        'for the "align" option within a substitution '
                        'definition.  Valid values for "align" are: "%s".'
                        % (self.name, self.options['align'],
                           '", "'.join(self.align_v_values)))
            elif self.options['align'] not in self.align_h_values:
                raise self.error(
                    'Error in "%s" directive: "%s" is not a valid value for '
                    'the "align" option.  Valid values for "align" are: "%s".'
                    % (self.name, self.options['align'],
                       '", "'.join(self.align_h_values)))
        messages = []
        reference = directives.uri(self.arguments[0])
        self.options['uri'] = reference
        reference_node = None
        if 'target' in self.options:
            block = states.escape2null(
                self.options['target']).splitlines()
            block = [line for line in block]
            target_type, data = self.state.parse_target(
                block, self.block_text, self.lineno)
            if target_type == 'refuri':
                reference_node = nodes.reference(refuri=data)
            elif target_type == 'refname':
                reference_node = nodes.reference(
                    refname=fully_normalize_name(data),
                    name=whitespace_normalize_name(data))
                reference_node.indirect_reference_name = data
                self.state.document.note_refname(reference_node)
            else:                           # malformed target
                messages.append(data)       # data is a system message
            del self.options['target']
        set_classes(self.options)
        image_node = nodes.image(self.block_text, **self.options)
        self.add_name(image_node)
        if reference_node:
            reference_node += image_node
            return messages + [reference_node]
        else:
            return messages + [image_node]

class Figure(Image):

def align(argument):
        return directives.choice(argument, Figure.align_h_values)

def figwidth_value(argument):
        if argument.lower() == 'image':
            return 'image'
        else:
            return directives.length_or_percentage_or_unitless(argument, 'px')

option_spec = Image.option_spec.copy()
    option_spec['figwidth'] = figwidth_value
    option_spec['figclass'] = directives.class_option
    option_spec['align'] = align
    has_content = True

def run(self):
        figwidth = self.options.pop('figwidth', None)
        figclasses = self.options.pop('figclass', None)
        align = self.options.pop('align', None)
        (image_node,) = Image.run(self)
        if isinstance(image_node, nodes.system_message):
            return [image_node]
        figure_node = nodes.figure('', image_node)
        if figwidth == 'image':
            if PIL and self.state.document.settings.file_insertion_enabled:
                imagepath = url2pathname(image_node['uri'])
                try:
                    with PIL.Image.open(imagepath) as img:
                        figure_node['width'] = '%dpx' % img.size[0]
                except (OSError, UnicodeEncodeError):
                    pass  # TODO: warn/info?
                else:
                    self.state.document.settings.record_dependencies.add(
                        imagepath.replace('\\', '/'))
        elif figwidth is not None:
            figure_node['width'] = figwidth
        if figclasses:
            figure_node['classes'] += figclasses
        if align:
            figure_node['align'] = align
        if self.content:
            node = nodes.Element()          # anonymous container for parsing
            self.state.nested_parse(self.content, self.content_offset, node)
            first_node = node[0]
            if isinstance(first_node, nodes.paragraph):
                caption = nodes.caption(first_node.rawsource, '',
                                        *first_node.children)
                caption.source = first_node.source
                caption.line = first_node.line
                figure_node += caption
            elif not (isinstance(first_node, nodes.comment)
                      and len(first_node) == 0):
                error = self.reporter.error(
                      'Figure caption must be a paragraph or empty comment.',
                      nodes.literal_block(self.block_text, self.block_text),
                      line=self.lineno)
                return [figure_node, error]
            if len(node) > 1:
                figure_node += nodes.legend('', *node[1:])
        return [figure_node]

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