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# -*- coding: utf-8 -*-
"""
sphinx.directives.code
~~~~~~~~~~~~~~~~~~~~~~
:copyright: Copyright 2007-2013 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import sys
import codecs
from docutils import nodes
from docutils.parsers.rst import Directive, directives
from sphinx import addnodes
from sphinx.util import parselinenos
from sphinx.util.nodes import set_source_info
class Highlight(Directive):
"""
Directive to set the highlighting language for code blocks, as well
as the threshold for line numbers.
"""
has_content = False
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = False
option_spec = {
'linenothreshold': directives.unchanged,
}
def run(self):
if 'linenothreshold' in self.options:
try:
linenothreshold = int(self.options['linenothreshold'])
except Exception:
linenothreshold = 10
else:
linenothreshold = sys.maxint
return [addnodes.highlightlang(lang=self.arguments[0].strip(),
linenothreshold=linenothreshold)]
class CodeBlock(Directive):
"""
Directive for a code block with special highlighting or line numbering
settings.
"""
has_content = True
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = False
option_spec = {
'linenos': directives.flag,
'lineno-start': int,
'emphasize-lines': directives.unchanged_required,
}
def run(self):
code = u'\n'.join(self.content)
linespec = self.options.get('emphasize-lines')
if linespec:
try:
nlines = len(self.content)
hl_lines = [x+1 for x in parselinenos(linespec, nlines)]
except ValueError, err:
document = self.state.document
return [document.reporter.warning(str(err), line=self.lineno)]
else:
hl_lines = None
literal = nodes.literal_block(code, code)
literal['language'] = self.arguments[0]
literal['linenos'] = 'linenos' in self.options or \
'lineno-start' in self.options
extra_args = literal['highlight_args'] = {}
if hl_lines is not None:
extra_args['hl_lines'] = hl_lines
if 'lineno-start' in self.options:
extra_args['linenostart'] = self.options['lineno-start']
set_source_info(self, literal)
return [literal]
class LiteralInclude(Directive):
"""
Like ``.. include:: :literal:``, but only warns if the include file is
not found, and does not raise errors. Also has several options for
selecting what to include.
"""
has_content = False
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = True
option_spec = {
'linenos': directives.flag,
'lineno-start': int,
'tab-width': int,
'language': directives.unchanged_required,
'encoding': directives.encoding,
'pyobject': directives.unchanged_required,
'lines': directives.unchanged_required,
'start-after': directives.unchanged_required,
'end-before': directives.unchanged_required,
'prepend': directives.unchanged_required,
'append': directives.unchanged_required,
'emphasize-lines': directives.unchanged_required,
}
def run(self):
document = self.state.document
if not document.settings.file_insertion_enabled:
return [document.reporter.warning('File insertion disabled',
line=self.lineno)]
env = document.settings.env
rel_filename, filename = env.relfn2path(self.arguments[0])
if 'pyobject' in self.options and 'lines' in self.options:
return [document.reporter.warning(
'Cannot use both "pyobject" and "lines" options',
line=self.lineno)]
encoding = self.options.get('encoding', env.config.source_encoding)
codec_info = codecs.lookup(encoding)
f = None
try:
f = codecs.StreamReaderWriter(open(filename, 'rb'),
codec_info[2], codec_info[3], 'strict')
lines = f.readlines()
except (IOError, OSError):
return [document.reporter.warning(
'Include file %r not found or reading it failed' % filename,
line=self.lineno)]
except UnicodeError:
return [document.reporter.warning(
'Encoding %r used for reading included file %r seems to '
'be wrong, try giving an :encoding: option' %
(encoding, filename))]
finally:
if f is not None:
f.close()
objectname = self.options.get('pyobject')
if objectname is not None:
from sphinx.pycode import ModuleAnalyzer
analyzer = ModuleAnalyzer.for_file(filename, '')
tags = analyzer.find_tags()
if objectname not in tags:
return [document.reporter.warning(
'Object named %r not found in include file %r' %
(objectname, filename), line=self.lineno)]
else:
lines = lines[tags[objectname][1]-1 : tags[objectname][2]-1]
linespec = self.options.get('lines')
if linespec is not None:
try:
linelist = parselinenos(linespec, len(lines))
except ValueError, err:
return [document.reporter.warning(str(err), line=self.lineno)]
# just ignore nonexisting lines
nlines = len(lines)
lines = [lines[i] for i in linelist if i < nlines]
if not lines:
return [document.reporter.warning(
'Line spec %r: no lines pulled from include file %r' %
(linespec, filename), line=self.lineno)]
linespec = self.options.get('emphasize-lines')
if linespec:
try:
hl_lines = [x+1 for x in parselinenos(linespec, len(lines))]
except ValueError, err:
return [document.reporter.warning(str(err), line=self.lineno)]
else:
hl_lines = None
startafter = self.options.get('start-after')
endbefore = self.options.get('end-before')
prepend = self.options.get('prepend')
append = self.options.get('append')
if startafter is not None or endbefore is not None:
use = not startafter
res = []
for line in lines:
if not use and startafter and startafter in line:
use = True
elif use and endbefore and endbefore in line:
use = False
break
elif use:
res.append(line)
lines = res
if prepend:
lines.insert(0, prepend + '\n')
if append:
lines.append(append + '\n')
text = ''.join(lines)
if self.options.get('tab-width'):
text = text.expandtabs(self.options['tab-width'])
retnode = nodes.literal_block(text, text, source=filename)
set_source_info(self, retnode)
if self.options.get('language', ''):
retnode['language'] = self.options['language']
retnode['linenos'] = 'linenos' in self.options or \
'lineno-start' in self.options
extra_args = retnode['highlight_args'] = {}
if hl_lines is not None:
extra_args['hl_lines'] = hl_lines
if 'lineno-start' in self.options:
extra_args['linenostart'] = self.options['lineno-start']
env.note_dependency(rel_filename)
return [retnode]
directives.register_directive('highlight', Highlight)
directives.register_directive('highlightlang', Highlight) # old
directives.register_directive('code-block', CodeBlock)
directives.register_directive('sourcecode', CodeBlock)
directives.register_directive('literalinclude', LiteralInclude)
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