diff options
Diffstat (limited to 'lib/htmlpurifier/library/HTMLPurifier/AttrTransform.php')
-rw-r--r-- | lib/htmlpurifier/library/HTMLPurifier/AttrTransform.php | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/htmlpurifier/library/HTMLPurifier/AttrTransform.php b/lib/htmlpurifier/library/HTMLPurifier/AttrTransform.php new file mode 100644 index 000000000..e61d3e01b --- /dev/null +++ b/lib/htmlpurifier/library/HTMLPurifier/AttrTransform.php @@ -0,0 +1,56 @@ +<?php + +/** + * Processes an entire attribute array for corrections needing multiple values. + * + * Occasionally, a certain attribute will need to be removed and popped onto + * another value. Instead of creating a complex return syntax for + * HTMLPurifier_AttrDef, we just pass the whole attribute array to a + * specialized object and have that do the special work. That is the + * family of HTMLPurifier_AttrTransform. + * + * An attribute transformation can be assigned to run before or after + * HTMLPurifier_AttrDef validation. See HTMLPurifier_HTMLDefinition for + * more details. + */ + +abstract class HTMLPurifier_AttrTransform +{ + + /** + * Abstract: makes changes to the attributes dependent on multiple values. + * + * @param $attr Assoc array of attributes, usually from + * HTMLPurifier_Token_Tag::$attr + * @param $config Mandatory HTMLPurifier_Config object. + * @param $context Mandatory HTMLPurifier_Context object + * @returns Processed attribute array. + */ + abstract public function transform($attr, $config, $context); + + /** + * Prepends CSS properties to the style attribute, creating the + * attribute if it doesn't exist. + * @param $attr Attribute array to process (passed by reference) + * @param $css CSS to prepend + */ + public function prependCSS(&$attr, $css) { + $attr['style'] = isset($attr['style']) ? $attr['style'] : ''; + $attr['style'] = $css . $attr['style']; + } + + /** + * Retrieves and removes an attribute + * @param $attr Attribute array to process (passed by reference) + * @param $key Key of attribute to confiscate + */ + public function confiscateAttr(&$attr, $key) { + if (!isset($attr[$key])) return null; + $value = $attr[$key]; + unset($attr[$key]); + return $value; + } + +} + +// vim: et sw=4 sts=4 |