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# $Id: __init__.py 9240 2022-11-13 16:15:23Z milde $
# Authors: Chris Liechti <cliechti@gmx.net>;
# David Goodger <goodger@python.org>
# Copyright: This module has been placed in the public domain.
"""
S5/HTML Slideshow Writer.
"""
__docformat__ = 'reStructuredText'
import sys
import os
import re
import docutils
from docutils import frontend, nodes, utils
from docutils.writers import html4css1
themes_dir_path = utils.relative_path(
os.path.join(os.getcwd(), 'dummy'),
os.path.join(os.path.dirname(__file__), 'themes'))
def find_theme(name):
# Where else to look for a theme?
# Check working dir? Destination dir? Config dir? Plugins dir?
path = os.path.join(themes_dir_path, name)
if not os.path.isdir(path):
raise docutils.ApplicationError(
'Theme directory not found: %r (path: %r)' % (name, path))
return path
class Writer(html4css1.Writer):
settings_spec = html4css1.Writer.settings_spec + (
'S5 Slideshow Specific Options',
'For the S5/HTML writer, the --no-toc-backlinks option '
'(defined in General Docutils Options above) is the default, '
'and should not be changed.',
(('Specify an installed S5 theme by name. Overrides --theme-url. '
'The default theme name is "default". The theme files will be '
'copied into a "ui/<theme>" directory, in the same directory as the '
'destination file (output HTML). Note that existing theme files '
'will not be overwritten (unless --overwrite-theme-files is used).',
['--theme'],
{'default': 'default', 'metavar': '<name>',
'overrides': 'theme_url'}),
('Specify an S5 theme URL. The destination file (output HTML) will '
'link to this theme; nothing will be copied. Overrides --theme.',
['--theme-url'],
{'metavar': '<URL>', 'overrides': 'theme'}),
('Allow existing theme files in the ``ui/<theme>`` directory to be '
'overwritten. The default is not to overwrite theme files.',
['--overwrite-theme-files'],
{'action': 'store_true', 'validator': frontend.validate_boolean}),
('Keep existing theme files in the ``ui/<theme>`` directory; do not '
'overwrite any. This is the default.',
['--keep-theme-files'],
{'dest': 'overwrite_theme_files', 'action': 'store_false'}),
('Set the initial view mode to "slideshow" [default] or "outline".',
['--view-mode'],
{'choices': ['slideshow', 'outline'], 'default': 'slideshow',
'metavar': '<mode>'}),
('Normally hide the presentation controls in slideshow mode. '
'This is the default.',
['--hidden-controls'],
{'action': 'store_true', 'default': True,
'validator': frontend.validate_boolean}),
('Always show the presentation controls in slideshow mode. '
'The default is to hide the controls.',
['--visible-controls'],
{'dest': 'hidden_controls', 'action': 'store_false'}),
('Enable the current slide indicator ("1 / 15"). '
'The default is to disable it.',
['--current-slide'],
{'action': 'store_true', 'validator': frontend.validate_boolean}),
('Disable the current slide indicator. This is the default.',
['--no-current-slide'],
{'dest': 'current_slide', 'action': 'store_false'}),))
settings_default_overrides = {'toc_backlinks': 0}
config_section = 's5_html writer'
config_section_dependencies = ('writers', 'html writers',
'html4css1 writer')
def __init__(self):
html4css1.Writer.__init__(self)
self.translator_class = S5HTMLTranslator
class S5HTMLTranslator(html4css1.HTMLTranslator):
s5_stylesheet_template = """\
<!-- configuration parameters -->
<meta name="defaultView" content="%(view_mode)s" />
<meta name="controlVis" content="%(control_visibility)s" />
<!-- style sheet links -->
<script src="%(path)s/slides.js" type="text/javascript"></script>
<link rel="stylesheet" href="%(path)s/slides.css"
type="text/css" media="projection" id="slideProj" />
<link rel="stylesheet" href="%(path)s/outline.css"
type="text/css" media="screen" id="outlineStyle" />
<link rel="stylesheet" href="%(path)s/print.css"
type="text/css" media="print" id="slidePrint" />
<link rel="stylesheet" href="%(path)s/opera.css"
type="text/css" media="projection" id="operaFix" />\n"""
# The script element must go in front of the link elements to
# avoid a flash of unstyled content (FOUC), reproducible with
# Firefox.
disable_current_slide = """
<style type="text/css">
#currentSlide {display: none;}
</style>\n"""
layout_template = """\
<div class="layout">
<div id="controls"></div>
<div id="currentSlide"></div>
<div id="header">
%(header)s
</div>
<div id="footer">
%(title)s%(footer)s
</div>
</div>\n"""
# <div class="topleft"></div>
# <div class="topright"></div>
# <div class="bottomleft"></div>
# <div class="bottomright"></div>
default_theme = 'default'
"""Name of the default theme."""
base_theme_file = '__base__'
"""Name of the file containing the name of the base theme."""
direct_theme_files = (
'slides.css', 'outline.css', 'print.css', 'opera.css', 'slides.js')
"""Names of theme files directly linked to in the output HTML"""
indirect_theme_files = (
's5-core.css', 'framing.css', 'pretty.css')
"""Names of files used indirectly; imported or used by files in
`direct_theme_files`."""
required_theme_files = indirect_theme_files + direct_theme_files
"""Names of mandatory theme files."""
def __init__(self, *args):
html4css1.HTMLTranslator.__init__(self, *args)
# insert S5-specific stylesheet and script stuff:
self.theme_file_path = None
self.setup_theme()
view_mode = self.document.settings.view_mode
control_visibility = ('visible', 'hidden')[self.document.settings
.hidden_controls]
self.stylesheet.append(self.s5_stylesheet_template
% {'path': self.theme_file_path,
'view_mode': view_mode,
'control_visibility': control_visibility})
if not self.document.settings.current_slide:
self.stylesheet.append(self.disable_current_slide)
self.meta.append('<meta name="version" content="S5 1.1" />\n')
self.s5_footer = []
self.s5_header = []
self.section_count = 0
self.theme_files_copied = None
def setup_theme(self):
if self.document.settings.theme:
self.copy_theme()
elif self.document.settings.theme_url:
self.theme_file_path = self.document.settings.theme_url
else:
raise docutils.ApplicationError(
'No theme specified for S5/HTML writer.')
def copy_theme(self):
"""
Locate & copy theme files.
A theme may be explicitly based on another theme via a '__base__'
file. The default base theme is 'default'. Files are accumulated
from the specified theme, any base themes, and 'default'.
"""
settings = self.document.settings
path = find_theme(settings.theme)
theme_paths = [path]
self.theme_files_copied = {}
required_files_copied = {}
# This is a link (URL) in HTML, so we use "/", not os.sep:
self.theme_file_path = '%s/%s' % ('ui', settings.theme)
if settings._destination:
dest = os.path.join(
os.path.dirname(settings._destination), 'ui', settings.theme)
if not os.path.isdir(dest):
os.makedirs(dest)
else:
# no destination, so we can't copy the theme
return
default = False
while path:
for f in os.listdir(path): # copy all files from each theme
if f == self.base_theme_file:
continue # ... except the "__base__" file
if (self.copy_file(f, path, dest)
and f in self.required_theme_files):
required_files_copied[f] = 1
if default:
break # "default" theme has no base theme
# Find the "__base__" file in theme directory:
base_theme_file = os.path.join(path, self.base_theme_file)
# If it exists, read it and record the theme path:
if os.path.isfile(base_theme_file):
with open(base_theme_file, encoding='utf-8') as f:
lines = f.readlines()
for line in lines:
line = line.strip()
if line and not line.startswith('#'):
path = find_theme(line)
if path in theme_paths: # check for duplicates/cycles
path = None # if found, use default base
else:
theme_paths.append(path)
break
else: # no theme name found
path = None # use default base
else: # no base theme file found
path = None # use default base
if not path:
path = find_theme(self.default_theme)
theme_paths.append(path)
default = True
if len(required_files_copied) != len(self.required_theme_files):
# Some required files weren't found & couldn't be copied.
required = list(self.required_theme_files)
for f in required_files_copied.keys():
required.remove(f)
raise docutils.ApplicationError(
'Theme files not found: %s'
% ', '.join('%r' % f for f in required))
files_to_skip_pattern = re.compile(r'~$|\.bak$|#$|\.cvsignore$')
def copy_file(self, name, source_dir, dest_dir):
"""
Copy file `name` from `source_dir` to `dest_dir`.
Return 1 if the file exists in either `source_dir` or `dest_dir`.
"""
source = os.path.join(source_dir, name)
dest = os.path.join(dest_dir, name)
if dest in self.theme_files_copied:
return 1
else:
self.theme_files_copied[dest] = 1
if os.path.isfile(source):
if self.files_to_skip_pattern.search(source):
return None
settings = self.document.settings
if os.path.exists(dest) and not settings.overwrite_theme_files:
settings.record_dependencies.add(dest)
else:
with open(source, 'rb') as src_file:
src_data = src_file.read()
with open(dest, 'wb') as dest_file:
dest_dir = dest_dir.replace(os.sep, '/')
dest_file.write(src_data.replace(
b'ui/default',
dest_dir[dest_dir.rfind('ui/'):].encode(
sys.getfilesystemencoding())))
settings.record_dependencies.add(source)
return 1
if os.path.isfile(dest):
return 1
def depart_document(self, node):
self.head_prefix.extend([self.doctype,
self.head_prefix_template %
{'lang': self.settings.language_code}])
self.html_prolog.append(self.doctype)
self.head = self.meta[:] + self.head
if self.math_header:
if self.math_output == 'mathjax':
self.head.extend(self.math_header)
else:
self.stylesheet.extend(self.math_header)
# skip content-type meta tag with interpolated charset value:
self.html_head.extend(self.head[1:])
self.fragment.extend(self.body)
# special S5 code up to the next comment line
header = ''.join(self.s5_header)
footer = ''.join(self.s5_footer)
title = ''.join(self.html_title).replace('<h1 class="title">', '<h1>')
layout = self.layout_template % {'header': header,
'title': title,
'footer': footer}
self.body_prefix.extend(layout)
self.body_prefix.append('<div class="presentation">\n')
self.body_prefix.append(
self.starttag({'classes': ['slide'], 'ids': ['slide0']}, 'div'))
if not self.section_count:
self.body.append('</div>\n')
#
self.body_suffix.insert(0, '</div>\n')
self.html_body.extend(self.body_prefix[1:] + self.body_pre_docinfo
+ self.docinfo + self.body
+ self.body_suffix[:-1])
def depart_footer(self, node):
start = self.context.pop()
self.s5_footer.append('<h2>')
self.s5_footer.extend(self.body[start:])
self.s5_footer.append('</h2>')
del self.body[start:]
def depart_header(self, node):
start = self.context.pop()
header = ['<div id="header">\n']
header.extend(self.body[start:])
header.append('\n</div>\n')
del self.body[start:]
self.s5_header.extend(header)
def visit_section(self, node):
if not self.section_count:
self.body.append('\n</div>\n')
self.section_count += 1
self.section_level += 1
if self.section_level > 1:
# dummy for matching div's
self.body.append(self.starttag(node, 'div', CLASS='section'))
else:
self.body.append(self.starttag(node, 'div', CLASS='slide'))
def visit_subtitle(self, node):
if isinstance(node.parent, nodes.section):
level = self.section_level + self.initial_header_level - 1
if level == 1:
level = 2
tag = 'h%s' % level
self.body.append(self.starttag(node, tag, ''))
self.context.append('</%s>\n' % tag)
else:
html4css1.HTMLTranslator.visit_subtitle(self, node)
def visit_title(self, node):
html4css1.HTMLTranslator.visit_title(self, node)
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