Package lxml :: Package html :: Module defs

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# Source Code for Module lxml.html.defs

      1  # FIXME: this should all be confirmed against what a DTD says
      2  # (probably in a test; this may not match the DTD exactly, but we
      3  # should document just how it differs).
      4
      5  # Data taken from http://www.w3.org/TR/html401/index/elements.html
      6  # and http://www.w3.org/community/webed/wiki/HTML/New_HTML5_Elements
      7  # for html5_tags.
      8
      9  try:
     10      frozenset
     11  except NameError:
     12      from sets import Set as frozenset
     13
     14
     15  empty_tags = frozenset([
     16      'area', 'base', 'basefont', 'br', 'col', 'frame', 'hr',
     17      'img', 'input', 'isindex', 'link', 'meta', 'param'])
     18
     19  deprecated_tags = frozenset([
     20      'applet', 'basefont', 'center', 'dir', 'font', 'isindex',
     21      'menu', 's', 'strike', 'u'])
     22
     23  # archive actually takes a space-separated list of URIs
     24  link_attrs = frozenset([
     25      'action', 'archive', 'background', 'cite', 'classid',
     26      'codebase', 'data', 'href', 'longdesc', 'profile', 'src',
     27      'usemap',
     28      # Not standard:
     29      'dynsrc', 'lowsrc',
     30      ])
     31
     32  # Not in the HTML 4 spec:
     33  # onerror, onresize
     34  event_attrs = frozenset([
     35      'onblur', 'onchange', 'onclick', 'ondblclick', 'onerror',
     36      'onfocus', 'onkeydown', 'onkeypress', 'onkeyup', 'onload',
     37      'onmousedown', 'onmousemove', 'onmouseout', 'onmouseover',
     38      'onmouseup', 'onreset', 'onresize', 'onselect', 'onsubmit',
     39      'onunload',
     40      ])
     41
     42  safe_attrs = frozenset([
     43      'abbr', 'accept', 'accept-charset', 'accesskey', 'action', 'align',
     44      'alt', 'axis', 'border', 'cellpadding', 'cellspacing', 'char', 'charoff',
     45      'charset', 'checked', 'cite', 'class', 'clear', 'cols', 'colspan',
     46      'color', 'compact', 'coords', 'datetime', 'dir', 'disabled', 'enctype',
     47      'for', 'frame', 'headers', 'height', 'href', 'hreflang', 'hspace', 'id',
     48      'ismap', 'label', 'lang', 'longdesc', 'maxlength', 'media', 'method',
     49      'multiple', 'name', 'nohref', 'noshade', 'nowrap', 'prompt', 'readonly',
     50      'rel', 'rev', 'rows', 'rowspan', 'rules', 'scope', 'selected', 'shape',
     51      'size', 'span', 'src', 'start', 'summary', 'tabindex', 'target', 'title',
     52      'type', 'usemap', 'valign', 'value', 'vspace', 'width'])
     53
     54  # From http://htmlhelp.com/reference/html40/olist.html
     55  top_level_tags = frozenset([
     56      'html', 'head', 'body', 'frameset',
     57      ])
     58
     59  head_tags = frozenset([
     60      'base', 'isindex', 'link', 'meta', 'script', 'style', 'title',
     61      ])
     62
     63  general_block_tags = frozenset([
     64      'address',
     65      'blockquote',
     66      'center',
     67      'del',
     68      'div',
     69      'h1',
     70      'h2',
     71      'h3',
     72      'h4',
     73      'h5',
     74      'h6',
     75      'hr',
     76      'ins',
     77      'isindex',
     78      'noscript',
     79      'p',
     80      'pre',
     81      ])
     82
     83  list_tags = frozenset([
     84      'dir', 'dl', 'dt', 'dd', 'li', 'menu', 'ol', 'ul',
     85      ])
     86
     87  table_tags = frozenset([
     88      'table', 'caption', 'colgroup', 'col',
     89      'thead', 'tfoot', 'tbody', 'tr', 'td', 'th',
     90      ])
     91
     92  # just this one from
     93  # http://www.georgehernandez.com/h/XComputers/HTML/2BlockLevel.htm
     94  block_tags = general_block_tags | list_tags | table_tags | frozenset([
     95      # Partial form tags
     96      'fieldset', 'form', 'legend', 'optgroup', 'option',
     97      ])
     98
     99  form_tags = frozenset([
    100      'form', 'button', 'fieldset', 'legend', 'input', 'label',
    101      'select', 'optgroup', 'option', 'textarea',
    102      ])
    103
    104  special_inline_tags = frozenset([
    105      'a', 'applet', 'basefont', 'bdo', 'br', 'embed', 'font', 'iframe',
    106      'img', 'map', 'area', 'object', 'param', 'q', 'script',
    107      'span', 'sub', 'sup',
    108      ])
    109
    110  phrase_tags = frozenset([
    111      'abbr', 'acronym', 'cite', 'code', 'del', 'dfn', 'em',
    112      'ins', 'kbd', 'samp', 'strong', 'var',
    113      ])
    114
    115  font_style_tags = frozenset([
    116      'b', 'big', 'i', 's', 'small', 'strike', 'tt', 'u',
    117      ])
    118
    119  frame_tags = frozenset([
    120      'frameset', 'frame', 'noframes',
    121      ])
    122
    123  html5_tags = frozenset([
    124      'article', 'aside', 'audio', 'canvas', 'command', 'datalist',
    125      'details', 'embed', 'figcaption', 'figure', 'footer', 'header',
    126      'hgroup', 'keygen', 'mark', 'math', 'meter', 'nav', 'output',
    127      'progress', 'rp', 'rt', 'ruby', 'section', 'source', 'summary',
    128      'svg', 'time', 'track', 'video', 'wbr'
    129      ])
    130
    131  # These tags aren't standard
    132  nonstandard_tags = frozenset(['blink', 'marquee'])
    133
    134
    135  tags = (top_level_tags | head_tags | general_block_tags | list_tags
    136          | table_tags | form_tags | special_inline_tags | phrase_tags
    137          | font_style_tags | nonstandard_tags | html5_tags)
    138