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Turn on entity parsing for the Lexers. Add PureHTMLDefinition and define removeForeignElements.
git-svn-id: http://htmlpurifier.org/svnroot/html_purifier/trunk@31 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang
169
PureHTMLDefinition.php
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169
PureHTMLDefinition.php
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<?php
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class PureHTMLDefinition
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{
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var $info = array();
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function PureHTMLDefinition() {
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}
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function loadData() {
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// emulates the structure of the DTD
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// array(
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// array of allowed child elements,
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// array of rejected child elements
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// indication about how many child elements are needed
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// )
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$entity['special.extra'] = array('img');
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$entity['special.basic'] = array('br','bdo','span');
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$entity['special'] = array_merge($entity['special.basic'],
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$entity['special.extra']);
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$entity['fontstyle.extra'] = array('big','small');
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$entity['fontstyle.basic'] = array('tt','i','b','u','s','strike');
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$entity['fontstyle'] = array_merge($entity['fontstyle.extra'],
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$entity['fontstyle.basic']);
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$entity['phrase.extra'] = array('sub','sup');
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$entity['phrase.basic'] = array('em','strong','dfn','code','samp','kbd',
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'var','cite','abbr','acronym','q');
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$entity['phrase'] = array_merge($entity['phrase.extra'],
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$entity['phrase.basic']);
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$entity['misc.inline'] = array('ins','del');
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$entity['misc'] = $entity['misc.inline'];
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$entity['inline'] = array_merge(array('a'), $entity['special'],
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$entity['fontstyle'], $entity['phrase']);
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$entity['heading'] = array('h1','h2','h3','h4','h5','h6');
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$entity['lists'] = array('ul','ol', 'dl');
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$entity['blocktext'] = array('pre','hr','blockquote','address');
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$entity['block'] = array_merge(array('p','div','table'),
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$entity['heading'],$entity['lists'], $entity['blocktext']);
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$entity['Inline'] = array_merge(array('#PCDATA'),$entity['special'],
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$entity['misc.inline']);
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$entity['Flow'] = array_merge(array('#PCDATA'), $entity['block'],
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$entity['inline'], $entity['misc']);
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$entity['a.content'] = array_merge(array('#PCDATA'), $entity['special'],
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$entity['fontstyle'], $entity['phrase'], $entity['misc.inline']);
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$entity['pre.content'] = array_merge(array('#PCDATA', 'a'),
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$entity['special.basic'], $entity['fontstyle.basic'],
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$entity['phrase.basic'], $entity['misc.inline']);
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$this->info['ins'] =
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$this->info['del'] =
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$this->info['blockquote'] =
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$this->info['dd'] =
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$this->info['div'] = array($entity['Flow']);
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$this->info['em'] =
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$this->info['strong'] =
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$this->info['dfn'] =
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$this->info['code'] =
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$this->info['samp'] =
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$this->info['kbd'] =
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$this->info['var'] =
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$this->info['code'] =
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$this->info['samp'] =
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$this->info['kbd'] =
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$this->info['var'] =
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$this->info['cite'] =
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$this->info['abbr'] =
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$this->info['acronym'] =
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$this->info['q'] =
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$this->info['sub'] =
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$this->info['tt'] =
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$this->info['sup'] =
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$this->info['i'] =
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$this->info['b'] =
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$this->info['big'] =
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$this->info['small'] =
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$this->info['u'] =
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$this->info['s'] =
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$this->info['strike'] =
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$this->info['bdo'] =
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$this->info['span'] =
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$this->info['dt'] =
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$this->info['p'] =
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$this->info['h1'] =
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$this->info['h2'] =
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$this->info['h3'] =
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$this->info['h4'] =
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$this->info['h5'] =
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$this->info['h6'] = array($entity['Inline']);
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$this->info['ol'] =
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$this->info['ul'] = array(array('li'),array(),'+');
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// the plus requires at least one child. I don't know what the
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// empty array is for though
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$this->info['dl'] = array(array('dt','dd'));
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$this->info['address'] =
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array(
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array_merge(
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array('#PCDATA', 'p'),
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$entity['inline'],
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$entity['misc.inline']));
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$this->info['img'] =
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$this->info['br'] =
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$this->info['hr'] = 'EMPTY';
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$this->info['pre'] = array($entity['pre.content']);
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$this->info['a'] = array($entity['a.content']);
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}
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function purifyTokens($tokens) {
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if (empty($this->info)) $this->loadData();
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$tokens = $this->removeForeignElements($tokens);
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$tokens = $this->makeWellFormed($tokens);
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$tokens = $this->fixNesting($tokens);
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$tokens = $this->validateAttributes($tokens);
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return $tokens;
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}
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function removeForeignElements($tokens) {
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if (empty($this->info)) $this->loadData();
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$result = array();
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foreach($tokens as $token) {
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if (is_subclass_of($token, 'MF_Tag')) {
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if (!isset($this->info[$token->name])) continue;
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} elseif (is_a($token, 'MF_Comment')) {
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// strip comments
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continue;
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} elseif (is_a($token, 'MF_Text')) {
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} else {
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continue;
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}
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$result[] = $token;
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}
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return $result;
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}
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function makeWellFormed($tokens) {
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if (empty($this->info)) $this->loadData();
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}
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function fixNesting($tokens) {
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if (empty($this->info)) $this->loadData();
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}
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function validateAttributes($tokens) {
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if (empty($this->info)) $this->loadData();
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}
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}
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?>
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