/usr/lib/python2.7/dist-packages/sphinx/ext/graphviz.py is in python-sphinx 1.3.6-2ubuntu1.
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"""
sphinx.ext.graphviz
~~~~~~~~~~~~~~~~~~~
Allow graphviz-formatted graphs to be included in Sphinx-generated
documents inline.
:copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
import codecs
import posixpath
from os import path
from subprocess import Popen, PIPE
from hashlib import sha1
from six import text_type
from docutils import nodes
from docutils.parsers.rst import directives
from docutils.statemachine import ViewList
import sphinx
from sphinx.errors import SphinxError
from sphinx.locale import _
from sphinx.util.osutil import ensuredir, ENOENT, EPIPE, EINVAL
from sphinx.util.compat import Directive
mapname_re = re.compile(r'<map id="(.*?)"')
class GraphvizError(SphinxError):
category = 'Graphviz error'
class graphviz(nodes.General, nodes.Element):
pass
def figure_wrapper(directive, node, caption):
figure_node = nodes.figure('', node)
parsed = nodes.Element()
directive.state.nested_parse(ViewList([caption], source=''),
directive.content_offset, parsed)
caption_node = nodes.caption(parsed[0].rawsource, '',
*parsed[0].children)
caption_node.source = parsed[0].source
caption_node.line = parsed[0].line
figure_node += caption_node
return figure_node
class Graphviz(Directive):
"""
Directive to insert arbitrary dot markup.
"""
has_content = True
required_arguments = 0
optional_arguments = 1
final_argument_whitespace = False
option_spec = {
'alt': directives.unchanged,
'inline': directives.flag,
'caption': directives.unchanged,
}
def run(self):
if self.arguments:
document = self.state.document
if self.content:
return [document.reporter.warning(
'Graphviz directive cannot have both content and '
'a filename argument', line=self.lineno)]
env = self.state.document.settings.env
rel_filename, filename = env.relfn2path(self.arguments[0])
env.note_dependency(rel_filename)
try:
fp = codecs.open(filename, 'r', 'utf-8')
try:
dotcode = fp.read()
finally:
fp.close()
except (IOError, OSError):
return [document.reporter.warning(
'External Graphviz file %r not found or reading '
'it failed' % filename, line=self.lineno)]
else:
dotcode = '\n'.join(self.content)
if not dotcode.strip():
return [self.state_machine.reporter.warning(
'Ignoring "graphviz" directive without content.',
line=self.lineno)]
node = graphviz()
node['code'] = dotcode
node['options'] = []
if 'alt' in self.options:
node['alt'] = self.options['alt']
node['inline'] = 'inline' in self.options
caption = self.options.get('caption')
if caption and not node['inline']:
node = figure_wrapper(self, node, caption)
return [node]
class GraphvizSimple(Directive):
"""
Directive to insert arbitrary dot markup.
"""
has_content = True
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = False
option_spec = {
'alt': directives.unchanged,
'inline': directives.flag,
'caption': directives.unchanged,
}
def run(self):
node = graphviz()
node['code'] = '%s %s {\n%s\n}\n' % \
(self.name, self.arguments[0], '\n'.join(self.content))
node['options'] = []
if 'alt' in self.options:
node['alt'] = self.options['alt']
node['inline'] = 'inline' in self.options
caption = self.options.get('caption')
if caption and not node['inline']:
node = figure_wrapper(self, node, caption)
return [node]
def render_dot(self, code, options, format, prefix='graphviz'):
"""Render graphviz code into a PNG or PDF output file."""
hashkey = (code + str(options) +
str(self.builder.config.graphviz_dot) +
str(self.builder.config.graphviz_dot_args)).encode('utf-8')
fname = '%s-%s.%s' % (prefix, sha1(hashkey).hexdigest(), format)
relfn = posixpath.join(self.builder.imgpath, fname)
outfn = path.join(self.builder.outdir, self.builder.imagedir, fname)
if path.isfile(outfn):
return relfn, outfn
if hasattr(self.builder, '_graphviz_warned_dot') or \
hasattr(self.builder, '_graphviz_warned_ps2pdf'):
return None, None
ensuredir(path.dirname(outfn))
# graphviz expects UTF-8 by default
if isinstance(code, text_type):
code = code.encode('utf-8')
dot_args = [self.builder.config.graphviz_dot]
dot_args.extend(self.builder.config.graphviz_dot_args)
dot_args.extend(options)
dot_args.extend(['-T' + format, '-o' + outfn])
if format == 'png':
dot_args.extend(['-Tcmapx', '-o%s.map' % outfn])
try:
p = Popen(dot_args, stdout=PIPE, stdin=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
self.builder.warn('dot command %r cannot be run (needed for graphviz '
'output), check the graphviz_dot setting' %
self.builder.config.graphviz_dot)
self.builder._graphviz_warned_dot = True
return None, None
try:
# Graphviz may close standard input when an error occurs,
# resulting in a broken pipe on communicate()
stdout, stderr = p.communicate(code)
except (OSError, IOError) as err:
if err.errno not in (EPIPE, EINVAL):
raise
# in this case, read the standard output and standard error streams
# directly, to get the error message(s)
stdout, stderr = p.stdout.read(), p.stderr.read()
p.wait()
if p.returncode != 0:
raise GraphvizError('dot exited with error:\n[stderr]\n%s\n'
'[stdout]\n%s' % (stderr, stdout))
if not path.isfile(outfn):
raise GraphvizError('dot did not produce an output file:\n[stderr]\n%s\n'
'[stdout]\n%s' % (stderr, stdout))
return relfn, outfn
def render_dot_html(self, node, code, options, prefix='graphviz',
imgcls=None, alt=None):
format = self.builder.config.graphviz_output_format
try:
if format not in ('png', 'svg'):
raise GraphvizError("graphviz_output_format must be one of 'png', "
"'svg', but is %r" % format)
fname, outfn = render_dot(self, code, options, format, prefix)
except GraphvizError as exc:
self.builder.warn('dot code %r: ' % code + str(exc))
raise nodes.SkipNode
inline = node.get('inline', False)
if inline:
wrapper = 'span'
else:
wrapper = 'p'
self.body.append(self.starttag(node, wrapper, CLASS='graphviz'))
if fname is None:
self.body.append(self.encode(code))
else:
if alt is None:
alt = node.get('alt', self.encode(code).strip())
imgcss = imgcls and 'class="%s"' % imgcls or ''
if format == 'svg':
svgtag = '''<object data="%s" type="image/svg+xml">
<p class="warning">%s</p></object>\n''' % (fname, alt)
self.body.append(svgtag)
else:
mapfile = open(outfn + '.map', 'rb')
try:
imgmap = mapfile.readlines()
finally:
mapfile.close()
if len(imgmap) == 2:
# nothing in image map (the lines are <map> and </map>)
self.body.append('<img src="%s" alt="%s" %s/>\n' %
(fname, alt, imgcss))
else:
# has a map: get the name of the map and connect the parts
mapname = mapname_re.match(imgmap[0].decode('utf-8')).group(1)
self.body.append('<img src="%s" alt="%s" usemap="#%s" %s/>\n' %
(fname, alt, mapname, imgcss))
self.body.extend([item.decode('utf-8') for item in imgmap])
self.body.append('</%s>\n' % wrapper)
raise nodes.SkipNode
def html_visit_graphviz(self, node):
render_dot_html(self, node, node['code'], node['options'])
def render_dot_latex(self, node, code, options, prefix='graphviz'):
try:
fname, outfn = render_dot(self, code, options, 'pdf', prefix)
except GraphvizError as exc:
self.builder.warn('dot code %r: ' % code + str(exc))
raise nodes.SkipNode
inline = node.get('inline', False)
if inline:
para_separator = ''
else:
para_separator = '\n'
if fname is not None:
self.body.append('%s\\includegraphics{%s}%s' %
(para_separator, fname, para_separator))
raise nodes.SkipNode
def latex_visit_graphviz(self, node):
render_dot_latex(self, node, node['code'], node['options'])
def render_dot_texinfo(self, node, code, options, prefix='graphviz'):
try:
fname, outfn = render_dot(self, code, options, 'png', prefix)
except GraphvizError as exc:
self.builder.warn('dot code %r: ' % code + str(exc))
raise nodes.SkipNode
if fname is not None:
self.body.append('@image{%s,,,[graphviz],png}\n' % fname[:-4])
raise nodes.SkipNode
def texinfo_visit_graphviz(self, node):
render_dot_texinfo(self, node, node['code'], node['options'])
def text_visit_graphviz(self, node):
if 'alt' in node.attributes:
self.add_text(_('[graph: %s]') % node['alt'])
else:
self.add_text(_('[graph]'))
raise nodes.SkipNode
def man_visit_graphviz(self, node):
if 'alt' in node.attributes:
self.body.append(_('[graph: %s]') % node['alt'])
else:
self.body.append(_('[graph]'))
raise nodes.SkipNode
def setup(app):
app.add_node(graphviz,
html=(html_visit_graphviz, None),
latex=(latex_visit_graphviz, None),
texinfo=(texinfo_visit_graphviz, None),
text=(text_visit_graphviz, None),
man=(man_visit_graphviz, None))
app.add_directive('graphviz', Graphviz)
app.add_directive('graph', GraphvizSimple)
app.add_directive('digraph', GraphvizSimple)
app.add_config_value('graphviz_dot', 'dot', 'html')
app.add_config_value('graphviz_dot_args', [], 'html')
app.add_config_value('graphviz_output_format', 'png', 'html')
return {'version': sphinx.__display_version__, 'parallel_read_safe': True}
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