You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
172 lines
6.8 KiB
172 lines
6.8 KiB
4 years ago
|
# $Id: images.py 8370 2019-08-27 12:10:39Z 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'
|
||
|
|
|
||
|
|
|
||
|
|
import sys
|
||
|
|
|
||
|
|
from docutils import nodes, utils
|
||
|
|
from docutils.parsers.rst import Directive
|
||
|
|
from docutils.parsers.rst import directives, states
|
||
|
|
from docutils.nodes import fully_normalize_name, whitespace_normalize_name
|
||
|
|
from docutils.parsers.rst.roles import set_classes
|
||
|
|
|
||
|
|
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(object): pass # dummy wrapper
|
||
|
|
PIL.Image = Image
|
||
|
|
except ImportError:
|
||
|
|
PIL = None
|
||
|
|
|
||
|
|
if sys.version_info >= (3, 0):
|
||
|
|
from urllib.request import url2pathname
|
||
|
|
else:
|
||
|
|
from urllib import url2pathname
|
||
|
|
|
||
|
|
|
||
|
|
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,
|
||
|
|
'name': directives.unchanged,
|
||
|
|
'target': directives.unchanged_required,
|
||
|
|
'class': directives.class_option}
|
||
|
|
|
||
|
|
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:
|
||
|
|
img = PIL.Image.open(
|
||
|
|
imagepath.encode(sys.getfilesystemencoding()))
|
||
|
|
except (IOError, UnicodeEncodeError):
|
||
|
|
pass # TODO: warn?
|
||
|
|
else:
|
||
|
|
self.state.document.settings.record_dependencies.add(
|
||
|
|
imagepath.replace('\\', '/'))
|
||
|
|
figure_node['width'] = '%dpx' % img.size[0]
|
||
|
|
del img
|
||
|
|
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.state_machine.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]
|