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https://github.com/renbaoshuo/S2OJ.git
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61 lines
1.9 KiB
PHP
61 lines
1.9 KiB
PHP
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<?php
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/**
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* Processes an entire attribute array for corrections needing multiple values.
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*
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* Occasionally, a certain attribute will need to be removed and popped onto
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* another value. Instead of creating a complex return syntax for
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* HTMLPurifier_AttrDef, we just pass the whole attribute array to a
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* specialized object and have that do the special work. That is the
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* family of HTMLPurifier_AttrTransform.
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*
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* An attribute transformation can be assigned to run before or after
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* HTMLPurifier_AttrDef validation. See HTMLPurifier_HTMLDefinition for
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* more details.
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*/
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abstract class HTMLPurifier_AttrTransform
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{
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/**
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* Abstract: makes changes to the attributes dependent on multiple values.
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*
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* @param array $attr Assoc array of attributes, usually from
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* HTMLPurifier_Token_Tag::$attr
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* @param HTMLPurifier_Config $config Mandatory HTMLPurifier_Config object.
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* @param HTMLPurifier_Context $context Mandatory HTMLPurifier_Context object
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* @return array Processed attribute array.
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*/
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abstract public function transform($attr, $config, $context);
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/**
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* Prepends CSS properties to the style attribute, creating the
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* attribute if it doesn't exist.
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* @param array &$attr Attribute array to process (passed by reference)
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* @param string $css CSS to prepend
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*/
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public function prependCSS(&$attr, $css)
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{
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$attr['style'] = isset($attr['style']) ? $attr['style'] : '';
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$attr['style'] = $css . $attr['style'];
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}
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/**
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* Retrieves and removes an attribute
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* @param array &$attr Attribute array to process (passed by reference)
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* @param mixed $key Key of attribute to confiscate
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* @return mixed
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*/
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public function confiscateAttr(&$attr, $key)
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{
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if (!isset($attr[$key])) {
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return null;
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}
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$value = $attr[$key];
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unset($attr[$key]);
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return $value;
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}
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}
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// vim: et sw=4 sts=4
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