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-rw-r--r--library/HTMLPurifier/AttrTransform/EnumToCSS.php58
1 files changed, 58 insertions, 0 deletions
diff --git a/library/HTMLPurifier/AttrTransform/EnumToCSS.php b/library/HTMLPurifier/AttrTransform/EnumToCSS.php
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index 000000000..2a5b4514a
--- /dev/null
+++ b/library/HTMLPurifier/AttrTransform/EnumToCSS.php
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * Generic pre-transform that converts an attribute with a fixed number of
+ * values (enumerated) to CSS.
+ */
+class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform {
+
+ /**
+ * Name of attribute to transform from
+ */
+ protected $attr;
+
+ /**
+ * Lookup array of attribute values to CSS
+ */
+ protected $enumToCSS = array();
+
+ /**
+ * Case sensitivity of the matching
+ * @warning Currently can only be guaranteed to work with ASCII
+ * values.
+ */
+ protected $caseSensitive = false;
+
+ /**
+ * @param $attr String attribute name to transform from
+ * @param $enumToCSS Lookup array of attribute values to CSS
+ * @param $case_sensitive Boolean case sensitivity indicator, default false
+ */
+ public function __construct($attr, $enum_to_css, $case_sensitive = false) {
+ $this->attr = $attr;
+ $this->enumToCSS = $enum_to_css;
+ $this->caseSensitive = (bool) $case_sensitive;
+ }
+
+ public function transform($attr, $config, $context) {
+
+ if (!isset($attr[$this->attr])) return $attr;
+
+ $value = trim($attr[$this->attr]);
+ unset($attr[$this->attr]);
+
+ if (!$this->caseSensitive) $value = strtolower($value);
+
+ if (!isset($this->enumToCSS[$value])) {
+ return $attr;
+ }
+
+ $this->prependCSS($attr, $this->enumToCSS[$value]);
+
+ return $attr;
+
+ }
+
+}
+
+// vim: et sw=4 sts=4