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# FIXME: this should all be confirmed against what a DTD says
# (probably in a test; this may not match the DTD exactly, but we
# should document just how it differs).
"""
Data taken from https://www.w3.org/TR/html401/index/elements.html
and https://www.w3.org/community/webed/wiki/HTML/New_HTML5_Elements
for html5_tags.
"""
empty_tags = frozenset([
'area', 'base', 'basefont', 'br', 'col', 'frame', 'hr',
'img', 'input', 'isindex', 'link', 'meta', 'param', 'source', 'track'])
deprecated_tags = frozenset([
'applet', 'basefont', 'center', 'dir', 'font', 'isindex',
'menu', 's', 'strike', 'u'])
# archive actually takes a space-separated list of URIs
link_attrs = frozenset([
'action', 'archive', 'background', 'cite', 'classid',
'codebase', 'data', 'href', 'longdesc', 'profile', 'src',
'usemap',
# Not standard:
'dynsrc', 'lowsrc',
# HTML5 formaction
'formaction'
])
# Not in the HTML 4 spec:
# onerror, onresize
event_attrs = frozenset([
'onblur', 'onchange', 'onclick', 'ondblclick', 'onerror',
'onfocus', 'onkeydown', 'onkeypress', 'onkeyup', 'onload',
'onmousedown', 'onmousemove', 'onmouseout', 'onmouseover',
'onmouseup', 'onreset', 'onresize', 'onselect', 'onsubmit',
'onunload',
])
safe_attrs = frozenset([
'abbr', 'accept', 'accept-charset', 'accesskey', 'action', 'align',
'alt', 'axis', 'border', 'cellpadding', 'cellspacing', 'char', 'charoff',
'charset', 'checked', 'cite', 'class', 'clear', 'cols', 'colspan',
'color', 'compact', 'coords', 'datetime', 'dir', 'disabled', 'enctype',
'for', 'frame', 'headers', 'height', 'href', 'hreflang', 'hspace', 'id',
'ismap', 'label', 'lang', 'longdesc', 'maxlength', 'media', 'method',
'multiple', 'name', 'nohref', 'noshade', 'nowrap', 'prompt', 'readonly',
'rel', 'rev', 'rows', 'rowspan', 'rules', 'scope', 'selected', 'shape',
'size', 'span', 'src', 'start', 'summary', 'tabindex', 'target', 'title',
'type', 'usemap', 'valign', 'value', 'vspace', 'width'])
# From http://htmlhelp.com/reference/html40/olist.html
top_level_tags = frozenset([
'html', 'head', 'body', 'frameset',
])
head_tags = frozenset([
'base', 'isindex', 'link', 'meta', 'script', 'style', 'title',
])
general_block_tags = frozenset([
'address',
'blockquote',
'center',
'del',
'div',
'h1',
'h2',
'h3',
'h4',
'h5',
'h6',
'hr',
'ins',
'isindex',
'noscript',
'p',
'pre',
])
list_tags = frozenset([
'dir', 'dl', 'dt', 'dd', 'li', 'menu', 'ol', 'ul',
])
table_tags = frozenset([
'table', 'caption', 'colgroup', 'col',
'thead', 'tfoot', 'tbody', 'tr', 'td', 'th',
])
# just this one from
# http://www.georgehernandez.com/h/XComputers/HTML/2BlockLevel.htm
block_tags = general_block_tags | list_tags | table_tags | frozenset([
# Partial form tags
'fieldset', 'form', 'legend', 'optgroup', 'option',
])
form_tags = frozenset([
'form', 'button', 'fieldset', 'legend', 'input', 'label',
'select', 'optgroup', 'option', 'textarea',
])
special_inline_tags = frozenset([
'a', 'applet', 'basefont', 'bdo', 'br', 'embed', 'font', 'iframe',
'img', 'map', 'area', 'object', 'param', 'q', 'script',
'span', 'sub', 'sup',
])
phrase_tags = frozenset([
'abbr', 'acronym', 'cite', 'code', 'del', 'dfn', 'em',
'ins', 'kbd', 'samp', 'strong', 'var',
])
font_style_tags = frozenset([
'b', 'big', 'i', 's', 'small', 'strike', 'tt', 'u',
])
frame_tags = frozenset([
'frameset', 'frame', 'noframes',
])
html5_tags = frozenset([
'article', 'aside', 'audio', 'canvas', 'command', 'datalist',
'details', 'embed', 'figcaption', 'figure', 'footer', 'header',
'hgroup', 'keygen', 'mark', 'math', 'meter', 'nav', 'output',
'progress', 'rp', 'rt', 'ruby', 'section', 'source', 'summary',
'svg', 'time', 'track', 'video', 'wbr'
])
# These tags aren't standard
nonstandard_tags = frozenset(['blink', 'marquee'])
tags = (top_level_tags | head_tags | general_block_tags | list_tags
| table_tags | form_tags | special_inline_tags | phrase_tags
| font_style_tags | nonstandard_tags | html5_tags)
........