Viewing file:  XHTML.py (15.91 KB) -rw-r--r--
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#._cv_part guppy.gsl.XHTML
class Node2XHTML:
def __init__(self, mod, node=None, error_report = None, encode_name=None
):
self.mod = mod
self.valid_html40 = False
self.encode = self.mod.encode
if encode_name is None:
encode_name = self.mod.encode_name
self.encode_name = encode_name
if error_report is not None:
self.error_report = error_report
self.document_lang = None
self.header_nodes = []
self.indent = 0
self.indentstep = 1
self.set_out([])
# xxx where do this?
charset = 'utf-8'
self.header_nodes.append(self.mod.node_of_taci(
'meta', '', (
self.mod.node_of_taci('http-equiv=', 'Content-Type'),
self.mod.node_of_taci('content=',
'text/html; charset=%s'%charset))))
if node is not None:
node.accept(self)
def _visit_children(self, node):
node, attrs = node.split_attrs()
# xxx handle attrs?
E = self.mod.ReportedError
for ch in node.children:
try:
ch.accept(self)
except E:
pass
def begin(self, tag, arg=''):
t = '<'+tag
if arg:
t = t + ' ' + arg
if tag in self.mod._no_end_tag_elements:
# Quote from: http://gutenberg.hwg.org/markupXHTML.html
# N.B. The penultimate closing slash on empty elements such as the <img/>
# element can cause a problem in older browsers. For this reason it is
# recommended that you leave a space before the slash, namely <img />
t += ' /'
t += '>'
if tag in self.mod.line_break_allowed:
t = '\n'+self.indent * ' ' + t
self.append(t)
self.indent += self.indentstep
def chg_out(self, out):
oo = self.out
self.set_out(out)
return oo
def encode_link_name(self, name):
# 1. Make the name better looking for a html user's perspective
# 2. Encode it by HTML rules
if name.startswith(self.mod.tgt_prefix):
name = name[len(self.mod.tgt_prefix):]
else:
# Should not happen often or at all
assert 0
name = self.encode_name(name)
return name
def end(self, tag):
self.indent -= self.indentstep
self.append('</%s>'%tag)
def error(self, msg, *args, **kwds):
msg = 'Doc2XHTML: ' + msg
self.error_report(msg, *args, **kwds)
def error_report(self, msg, *args, **kwds):
print 'HTML ENCODING ERROR: ', msg, 'args=',args, 'kwds=',kwds
raise ValueError
def gen_document_header(self, lang, header_nodes):
# lang & title are nodes with text or char directives, to be encoded.
# metas is a list of nodes, with data to be encoded
strict = 1 # we have alternatives, I just havent yet decided how or if to let the user choose
if strict:
self.append("""\
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
""")
else:
self.append("""\
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
""")
self.begin('html',
'lang=%r xmlns="http://www.w3.org/1999/xhtml"'%self.get_encoded_text(lang),
)
self.begin('head')
for node in header_nodes:
self.gen_stdhtml(node)
self.end('head')
self.begin('body')
# Get around w3c restriction that character data are not allowed
# directly in body, makes it easier to write compliant code
# Arguably the restriction is there for a reason, but I dont know...
self.begin('div')
def gen_document_trailer(self):
self.end('div')
self.end('body')
self.end('html')
def gen_empty_elmt(self, tag, arg=''):
self.begin(tag, arg)
self.indent -= self.indentstep
def gen_generated_from_gsl(self):
self.gen_empty_elmt('hr')
self.append('Generated by ')
self.begin('a', 'href="http://guppy-pe.sourceforge.net/gsl.html"')
#self.begin('a', 'href="gsl.html"')
self.append('GSL-XHTML 0.1.7')
self.end('a')
self.append(' on '+self.mod.time.asctime(self.mod.time.localtime()))
def gen_meta(self, node, tag=None):
mknode = self.mod.node_of_taci
if tag is None:
tag = node.tag
self.header_nodes.append(
mknode('meta', '',
[mknode('name=', tag),
mknode('content=', node.arg, node.children)]))
def gen_stdhtml(self, node, tag=None, **options):
if tag is None:
tag = node.tag
node, attrs = node.split_attrs(tag)
self.begin(tag, ' '.join(['%s=%r'%(key, val) for (key, val) in attrs]))
if tag in self.mod._no_end_tag_elements:
if node.arg:
self.error('No enclosed text allowed for Html tag: %r.'%node.tag)
self.no_children(node)
self.indent -= self.indentstep
else:
node.arg_accept(self)
self.end(tag)
def get_encoded_text(self, node):
# From a node's arg and children that are text or characters
old_out = self.chg_out([])
self.append(self.encode(node.arg))
for ch in node.children:
if ch.tag in ('text', 'char'):
ch.accept(self)
else:
self.error('Only text and char allowed here, not %r.'%ch.tag, ch)
return ''.join(self.chg_out(old_out))
def get_html(self):
return ''.join(self.out)
def no_children(self, node):
if node.children:
self.error('No children allowed for %r. Got children nodes = %r.'%(
node.tag, node.children))
def set_out(self, out):
self.out = out
self.extend = out.extend
self.append = out.append
def visit_author(self, node):
self.gen_meta(node)
def visit_block(self, node):
self._visit_children(node)
def visit_char(self, node):
name = node.get_namearg()
if name in self.mod.name2codepoint:
name = '&%s;'%name
else:
if name[:2] == "0x":
char = int(name[2:], 16)
elif name.isdigit():
char = int(name)
else:
self.error('No such character: %r.'%name, node)
name = self.mod.codepoint2name.get(char)
if name is None:
name = '&#%d;'%char
else:
name = '&%s;'%name
self.append(name)
self._visit_children(node)
def visit_col_width(self, node):
self.append('<col width="%s" />'%node.arg)
def visit_comment(self, node):
return
# self.append('<!-- %s -->'%node.arg)
def visit_default(self, node):
if node.tag in self.mod.stdhtml:
if node.tag in self.mod._head_elements:
self.head_nodes.append(node)
else:
self.gen_stdhtml(node)
else:
self.error('I don\'t know what to generate for the tag %r.'%node.tag, node)
def visit_define(self, node):
name = self.encode_link_name(node.arg)
self.begin('a', 'name=%r'%name)
self._visit_children(node)
self.end('a')
def visit_document(self, node):
self.indent = 2 # Known indentation of header to be generated later
oldout = self.chg_out([])
self._visit_children(node)
# self.gen_generated_from_gsl()
newout = self.chg_out(oldout)
mknode = self.mod.node_of_taci
lang = self.document_lang
if not lang:
lang = mknode('document_lang', 'en')
self.indent = 0
self.gen_document_header(lang, self.header_nodes)
self.out.extend(newout)
self.gen_document_trailer()
def visit_document_lang(self, node):
if self.document_lang is not None:
self.error('Duplicate document lang directive.', node)
self.document_lang = node
def visit_document_title(self, node):
self.header_nodes.append(self.mod.node_of_taci('title', node.arg))
def visit_enumerate(self, node):
self.begin('ol')
for c in node.children:
self.begin('li')
c.accept(self)
self.end('li')
self.end('ol')
def visit_exdefs(self, node):
self.symplace = {}
for ch in node.children:
syms = [x.strip() for x in ch.arg.split(',')]
for sym in syms:
self.symplace[sym] = ch.tag
def visit_generated_from_gsl(self, node):
self.gen_generated_from_gsl()
def visit_header(self, node):
self.header_nodes.extend(node.children)
def visit_itemize(self, node):
self.begin('ul')
for c in node.children:
self.begin('li')
c.accept(self)
self.end('li')
self.end('ul')
def visit_link_to_extern(self, node):
name = node.arg
docname = node.children[0].arg
children = node.children[1:]
uri = '%s.html#%s'%(docname, self.encode_link_name(name))
self.begin('a', 'href=%r'%uri)
if not children:
self.append(self.encode(name))
else:
for ch in children:
ch.accept(self)
self.end('a')
def visit_link_to_local(self, node):
name = node.arg
uri = '#%s'%self.encode_link_name(name)
self.begin('a', 'href=%r'%uri)
if not node.children:
self.append(self.encode(name))
else:
self._visit_children(node)
self.end('a')
def visit_link_to_unresolved(self, node):
name = node.arg
self.begin('em')
if not node.children:
self.append(self.encode(name))
else:
self._visit_children(node)
self.end('em')
def visit_literal_block(self, node):
self.gen_stdhtml(node, 'pre')
def visit_man_page_mode(self, node):
self._visit_children(node)
def visit_meta(self, node):
self.document_metas.append(node)
def visit_spc_colonkind(self, node):
#self.append(' <strong>:</strong> ')
#self.append(' <code>:</code> ')
self.append('<code>:</code> ')
def visit_spc_mapsto(self, node):
self.append(' <strong>-></strong> ')
def visit_string(self, node):
self._visit_children(node)
def visit_symbol(self, node):
self.visit_text(node)
def visit_text(self, node):
text = self.encode(node.arg)
if len(text) > 80 or '\n' in text:
self.append('\n')
self.append(text)
self._visit_children(node)
def visit_to_document_only(self, node):
self._visit_children(node)
def visit_to_html_only(self, node):
self._visit_children(node)
def visit_to_tester_only(self, node):
pass
def visit_valid_html40(self, node):
self.valid_html40 = node
node, attrs = self.valid_html40.split_attrs(attrdict=True)
# XXX check allowed attrs but in a GENERAL way
# Code taken from validator.w3.org
self.append("""\
<a href="http://validator.w3.org/check?uri=referer"><img
src="%s"
alt="Valid HTML 4.0 Strict" height="31" width="88" /></a>
"""%attrs.get('src', 'http://www.w3.org/Icons/valid-html40'))
def visit_with(self, node):
pass
def visit_word(self, node):
self._visit_children(node)
class _GLUECLAMP_:
_imports_ = (
'_parent:SpecNodes',
'_parent.SpecNodes:node_of_taci',
'_parent.Gsml:is_not_ascii',
'_parent.Main:tgt_prefix',
'_parent.Main:ReportedError',
'_root.htmlentitydefs:name2codepoint',
'_root.htmlentitydefs:codepoint2name',
'_root:re',
'_root:time',
)
_chgable_ = ('tag_uppercase_name_chars',)
# Set to make upper-case name characters tagged to make sure
# no names in a file differ only in case as stated in HTML spec.
# I believe this doesn't matter in practice in contemporary browsers,
# since references are also said to be case sensitive!
# -- I can't be bothered to solve this better now. See also Notes Aug 12 2005.
tag_uppercase_name_chars = 0
_html3_2 = (
'a', 'address', 'area',
'b', 'base', 'big', 'blockquote', 'body', 'br',
'caption', 'center', 'cite', 'code',
'dfn', 'dt','dl', 'dd','div',
'em', 'form',
'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'html',
'i', 'img', 'input', 'kbd',
'li',
'ol', 'option',
'p', 'param', 'pre',
'samp', 'select', 'small', 'strong', 'style', 'sub', 'sup',
'table', 'td', 'textarea', 'th', 'thead', 'title', 'tr', 'tt',
'ul',
'var')
# Included in Html 3.2 but 'deprecated' in Html 4.0
_html4_0_deprecated = (
'applet', 'basefont', 'dir', 'font', 'isindex',
'strike', 'u',
)
# Included in 3.2, not depreciated in 4.0 but one may want to avoid them
_html_avoid = (
'script',
)
_html4_0 = (
'abbr', 'acronym',
'bdo','button',
'col', 'colgroup',
'del',
'fieldset', 'frame', 'frameset',
'iframe', 'ins',
'label', 'legend',
'noframes', 'noscript',
'object','optgroup',
'q','s', 'span',
'tbody', 'tfoot', 'thead')
_head_elements = (
'base','isindex','link','meta','script','style','title'
)
# The ones that can have no end tag
# xxx are there more -style etc- look it up!
_no_end_tag_elements = (
# Header elmts
'meta', 'link',
# Other
'img',
'hr', # CAN have end tag? but never has. This will self-close to generate valid XHTML.
)
# The ones that we may generate line-break before
# and hope it will not affect the insertion of spaces in rendering.
_line_break_allowed = (
'html','head','body','frameset',
# Head Elements
) + _head_elements + (
# Generic Block-level Elements
'address','blockquote','center','del','div',
'h1','h2','h3','h4','h5','h6','hr','ins','isindex','noscript','p','pre',
# Lists
'dir','dl','dt','dd','li','menu','ol','ul',
# Tables
'table','caption','colgroup','col','thead','tfoot','tbody','tr','td','th',
# Forms
'form','button','fieldset','legend','input','label',
'select','optgroup','option','textarea'
)
# The attributes allowed in META elements
meta_attributes = ('name', 'http-equiv', 'content', 'scheme', 'lang', 'dir')
# This returns a function checking if a character is allowed to be used
# as the first character in a NAME or ID attribute.
# (I don't think this is the same as .isalpha() with unicode.)
def _get_is_name_starter_char(self):
return self.re.compile(r"[A-Za-z]").match
# This returns a function checking if a character is allowed to be used
# after the first character in a NAME or ID attribute.
def _get_is_name_follower_char(self):
return self.re.compile(r"[A-Za-z0-9\-_:\.]").match
# A set of the ones we generate directly.
# This includes the ones from html 3.2 and
# I have also included the deprecated and the 4.0 only
def _get_stdhtml(self):
sh = {}
for x in self._html3_2 + self._html4_0_deprecated + self._html4_0:
sh[x] = 1
return sh
def _get_line_break_allowed(self):
sh = {}
for x in self._line_break_allowed:
sh[x] = 1
return sh
def doc2filer(self, doc, node, name, dir, opts, IO):
text = self.doc2text(doc, node)
path = IO.path.join(dir, '%s.html'%name)
node = self.node_of_taci('write_file', path, [self.node_of_taci('text', text)])
return node
def doc2text(self, doc, node):
d2h = Node2XHTML(self, node, doc.env.error)
return d2h.get_html()
def node2file(self, node, file):
text = self.node2text(node)
f = open(file, 'w')
f.write(text)
f.close()
def node2text(self, node):
text = Node2XHTML(self, node).get_html()
return text
# Adapted from html4css1.py in docutils
def encode(self, text):
"""Encode special characters in `text` & return."""
# @@@ A codec to do these and all other HTML entities would be nice.
text = text.replace("&", "&")
text = text.replace("<", "<")
text = text.replace('"', """)
text = text.replace(">", ">")
text = text.replace("@", "@") # may thwart some address harvesters
return text
# Encode a name according to HTML spec. See also Notes Aug 12 2005.
# From wdghtml40/values.html#cdata :
# Attribute values of type ID and NAME must begin with a letter in the
# range A-Z or a-z and may be followed by letters (A-Za-z), digits
# (0-9), hyphens ("-"), underscores ("_"), colons (":"), and periods
# ("."). These values are case-sensitive.
def encode_name(self, name):
is_name_follower_char = self.is_name_follower_char
ns = []
append = ns.append
upperstate = 0
ch = name[:1]
if ch == 'z' or not self.is_name_starter_char(ch):
append('z')
if ch == 'z':
append('z')
for ch in name:
if ch == '-' or not is_name_follower_char(ch):
if upperstate:
append('-')
upperstate = 0
append('-')
if ch != '-':
append('%d'%ord(ch))
append('-')
elif ch.isupper() and self.tag_uppercase_name_chars:
if not upperstate:
append('-')
upperstate = 1
append(ch)
else:
if upperstate:
append('-')
upperstate = 0
append(ch)
if upperstate:
append('-')
return ''.join(ns)
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