setup(); } return $instance; } function HTMLPurifier_Definition() {} function setup() { // emulates the structure of the DTD // these are condensed, however, with bad stuff taken out // screening process was done by hand ////////////////////////////////////////////////////////////////////// // info[] : initializes the definition objects // if you attempt to define rules later on for a tag not in this array // PHP will create an stdclass $allowed_tags = array( 'ins', 'del', 'blockquote', 'dd', 'li', 'div', 'em', 'strong', 'dfn', 'code', 'samp', 'kbd', 'var', 'cite', 'abbr', 'acronym', 'q', 'sub', 'tt', 'sup', 'i', 'b', 'big', 'small', 'u', 's', 'strike', 'bdo', 'span', 'dt', 'p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'ol', 'ul', 'dl', 'address', 'img', 'br', 'hr', 'pre', 'a', 'table', 'caption', 'thead', 'tfoot', 'tbody', 'colgroup', 'col', 'td', 'th', 'tr' ); foreach ($allowed_tags as $tag) { $this->info[$tag] = new HTMLPurifier_ElementDef(); } ////////////////////////////////////////////////////////////////////// // info[]->child : defines allowed children for elements // entities: prefixed with e_ and _ replaces . // we don't use an array because that complicates interpolation // strings are used instead of arrays because if you use arrays, // you have to do some hideous manipulation with array_merge() $e_special_extra = 'img'; $e_special_basic = 'br | span | bdo'; $e_special = "$e_special_basic | $e_special_extra"; $e_fontstyle_extra = 'big | small'; $e_fontstyle_basic = 'tt | i | b | u | s | strike'; $e_fontstyle = "$e_fontstyle_basic | $e_fontstyle_extra"; $e_phrase_extra = 'sub | sup'; $e_phrase_basic = 'em | strong | dfn | code | q | samp | kbd | var'. ' | cite | abbr | acronym'; $e_phrase = "$e_phrase_basic | $e_phrase_extra"; $e_inline_forms = ''; // humor the dtd $e_misc_inline = 'ins | del'; $e_misc = "$e_misc_inline"; $e_inline = "a | $e_special | $e_fontstyle | $e_phrase". " | $e_inline_forms"; $e__inline = "#PCDATA | $e_inline | $e_misc_inline"; // note the casing $e_Inline = new HTMLPurifier_ChildDef_Optional($e__inline); $e_heading = 'h1|h2|h3|h4|h5|h6'; $e_lists = 'ul | ol | dl'; $e_blocktext = 'pre | hr | blockquote | address'; $e_block = "p | $e_heading | div | $e_lists | $e_blocktext | table"; $e__flow = "#PCDATA | $e_block | $e_inline | $e_misc"; $e_Flow = new HTMLPurifier_ChildDef_Optional($e__flow); $e_a_content = new HTMLPurifier_ChildDef_Optional("#PCDATA | $e_special". " | $e_fontstyle | $e_phrase | $e_inline_forms | $e_misc_inline"); $e_pre_content = new HTMLPurifier_ChildDef_Optional("#PCDATA | a". " | $e_special_basic | $e_fontstyle_basic | $e_phrase_basic". " | $e_inline_forms | $e_misc_inline"); $e_form_content = new HTMLPurifier_ChildDef_Optional(''); //unused $e_form_button_content = new HTMLPurifier_ChildDef_Optional(''); // unused $this->info['ins']->child = $this->info['del']->child = new HTMLPurifier_ChildDef_Chameleon($e__inline, $e__flow); $this->info['blockquote']->child= $this->info['dd']->child = $this->info['li']->child = $this->info['div']->child = $e_Flow; $this->info['em']->child = $this->info['strong']->child = $this->info['dfn']->child = $this->info['code']->child = $this->info['samp']->child = $this->info['kbd']->child = $this->info['var']->child = $this->info['cite']->child = $this->info['abbr']->child = $this->info['acronym']->child = $this->info['q']->child = $this->info['sub']->child = $this->info['tt']->child = $this->info['sup']->child = $this->info['i']->child = $this->info['b']->child = $this->info['big']->child = $this->info['small']->child= $this->info['u']->child = $this->info['s']->child = $this->info['strike']->child = $this->info['bdo']->child = $this->info['span']->child = $this->info['dt']->child = $this->info['p']->child = $this->info['h1']->child = $this->info['h2']->child = $this->info['h3']->child = $this->info['h4']->child = $this->info['h5']->child = $this->info['h6']->child = $e_Inline; // the only three required definitions, besides custom table code $this->info['ol']->child = $this->info['ul']->child = new HTMLPurifier_ChildDef_Required('li'); $this->info['dl']->child = new HTMLPurifier_ChildDef_Required('dt|dd'); $this->info['address']->child = new HTMLPurifier_ChildDef_Optional("#PCDATA | p | $e_inline". " | $e_misc_inline"); $this->info['img']->child = $this->info['br']->child = $this->info['hr']->child = new HTMLPurifier_ChildDef_Empty(); $this->info['pre']->child = $e_pre_content; $this->info['a']->child = $e_a_content; $this->info['table']->child = new HTMLPurifier_ChildDef_Custom( '(caption?, (col*|colgroup*), thead?, tfoot?, (tbody+|tr+))'); // not a real entity, watch the double underscore $e__row = new HTMLPurifier_ChildDef_Required('tr'); $this->info['thead']->child = $e__row; $this->info['tfoot']->child = $e__row; $this->info['tbody']->child = $e__row; $this->info['colgroup']->child = new HTMLPurifier_ChildDef_Optional('col'); $this->info['col']->child = new HTMLPurifier_ChildDef_Empty(); $this->info['tr']->child = new HTMLPurifier_ChildDef_Required('th | td'); $this->info['th']->child = $e_Flow; $this->info['td']->child = $e_Flow; ////////////////////////////////////////////////////////////////////// // info[]->type : defines the type of the element (block or inline) // reuses $e_Inline and $e_block foreach ($e_Inline->elements as $name) { $this->info[$name]->type = 'inline'; } $e_Block = new HTMLPurifier_ChildDef_Optional($e_block); foreach ($e_Block->elements as $name) { $this->info[$name]->type = 'block'; } ////////////////////////////////////////////////////////////////////// // info[]->excludes : defines elements that aren't allowed in here // make sure you test using isset() and not !empty() $this->info['a']->excludes = array('a' => true); $this->info['pre']->excludes = array_flip(array('img', 'big', 'small', // technically in spec, but we don't allow em anyway 'object', 'applet', 'font', 'basefont')); ////////////////////////////////////////////////////////////////////// // info[]->attr : defines allowed attributes for elements // this doesn't include REQUIRED declarations, those are handled // by the transform classes. It will, however, do simple and slightly // complex attribute value substitution $e_Text = new HTMLPurifier_AttrDef_Text(); // attrs, included in almost every single one except for a few, // which manually override these in their local definitions $this->info_global_attr = array( // core attrs 'id' => new HTMLPurifier_AttrDef_ID(), 'class' => new HTMLPurifier_AttrDef_Class(), 'title' => $e_Text, // i18n 'dir' => new HTMLPurifier_AttrDef_Enum(array('ltr','rtl'), false), 'lang' => new HTMLPurifier_AttrDef_Lang(), 'xml:lang' => new HTMLPurifier_AttrDef_Lang(), ); // required attribute stipulation handled in attribute transformation $this->info['bdo']->attr = array(); // nothing else $this->info['br']->attr['dir'] = false; $this->info['br']->attr['lang'] = false; $this->info['br']->attr['xml:lang'] = false; $this->info['td']->attr['abbr'] = $e_Text; $this->info['th']->attr['abbr'] = $e_Text; $this->setAttrForTableElements('align', new HTMLPurifier_AttrDef_Enum( array('left', 'center', 'right', 'justify', 'char'), false)); $this->setAttrForTableElements('valign', new HTMLPurifier_AttrDef_Enum( array('top', 'middle', 'bottom', 'baseline'), false)); $this->info['img']->attr['alt'] = $e_Text; $e_TFrame = new HTMLPurifier_AttrDef_Enum(array('void', 'above', 'below', 'hsides', 'lhs', 'rhs', 'vsides', 'box', 'border'), false); $this->info['table']->attr['frame'] = $e_TFrame; $e_TRules = new HTMLPurifier_AttrDef_Enum(array('none', 'groups', 'rows', 'cols', 'all'), false); $this->info['table']->attr['rules'] = $e_TRules; $this->info['table']->attr['summary'] = $e_Text; $this->info['table']->attr['border'] = new HTMLPurifier_AttrDef_Pixels(); $e_Length = new HTMLPurifier_AttrDef_Length(); $this->info['table']->attr['cellpadding'] = $this->info['table']->attr['cellspacing'] = $this->info['table']->attr['width'] = $this->info['img']->attr['height'] = $this->info['img']->attr['width'] = $e_Length; $this->setAttrForTableElements('charoff', $e_Length); $e_MultiLength = new HTMLPurifier_AttrDef_MultiLength(); $this->info['col']->attr['width'] = $this->info['colgroup']->attr['width'] = $e_MultiLength; $e__NumberSpan = new HTMLPurifier_AttrDef_NumberSpan(); $this->info['colgroup']->attr['span'] = $this->info['col']->attr['span'] = $this->info['td']->attr['rowspan'] = $this->info['th']->attr['rowspan'] = $this->info['td']->attr['colspan'] = $this->info['th']->attr['colspan'] = $e__NumberSpan; $e_URI = new HTMLPurifier_AttrDef_URI(); $this->info['a']->attr['href'] = $this->info['img']->attr['longdesc'] = $this->info['img']->attr['src'] = $this->info['del']->attr['cite'] = $this->info['ins']->attr['cite'] = $this->info['blockquote']->attr['cite'] = $this->info['q']->attr['cite'] = $e_URI; ////////////////////////////////////////////////////////////////////// // UNIMP : info_tag_transform : transformations of tags $this->info_tag_transform['font'] = new HTMLPurifier_TagTransform_Font(); $this->info_tag_transform['menu'] = new HTMLPurifier_TagTransform_Simple('ul'); $this->info_tag_transform['dir'] = new HTMLPurifier_TagTransform_Simple('ul'); $this->info_tag_transform['center'] = new HTMLPurifier_TagTransform_Center(); ////////////////////////////////////////////////////////////////////// // info[]->auto_close : tags that automatically close another // make sure you test using isset() not !empty() // these are all block elements: blocks aren't allowed in P $this->info['p']->auto_close = array_flip(array( 'address', 'blockquote', 'dd', 'dir', 'div', 'dl', 'dt', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'ol', 'p', 'pre', 'table', 'ul' )); $this->info['li']->auto_close = array('li' => true); // we need TABLE and heading mismatch code // we may need to make this more flexible for heading mismatch, // or we can just create another info ////////////////////////////////////////////////////////////////////// // info[]->attr_transform : attribute transformations in elements $transform = new HTMLPurifier_AttrTransform_TextAlign(); $this->info['h1']->attr_transform[] = $this->info['h2']->attr_transform[] = $this->info['h3']->attr_transform[] = $this->info['h4']->attr_transform[] = $this->info['h5']->attr_transform[] = $this->info['h6']->attr_transform[] = $this->info['p'] ->attr_transform[] = $transform; ////////////////////////////////////////////////////////////////////// // info_attr_transform : global attribute transformation that is // unconditionally called. Good for transformations that have complex // start conditions $this->info_attr_transform[] = new HTMLPurifier_AttrTransform_Lang(); } function setAttrForTableElements($attr, $def) { $this->info['col']->attr[$attr] = $this->info['colgroup']->attr[$attr] = $this->info['tbody']->attr[$attr] = $this->info['td']->attr[$attr] = $this->info['tfoot']->attr[$attr] = $this->info['th']->attr[$attr] = $this->info['thead']->attr[$attr] = $this->info['tr']->attr[$attr] = $def; } } class HTMLPurifier_ElementDef { var $attr = array(); var $attr_transform = array(); var $auto_close = array(); var $child; var $type = 'unknown'; var $excludes = array(); } ?>