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Diffstat (limited to 'vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php')
-rw-r--r--vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php77
1 files changed, 77 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php
new file mode 100644
index 0000000..bde4c33
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php
@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * Microsoft's proprietary filter: CSS property
+ * @note Currently supports the alpha filter. In the future, this will
+ * probably need an extensible framework
+ */
+class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
+{
+ /**
+ * @type HTMLPurifier_AttrDef_Integer
+ */
+ protected $intValidator;
+
+ public function __construct()
+ {
+ $this->intValidator = new HTMLPurifier_AttrDef_Integer();
+ }
+
+ /**
+ * @param string $value
+ * @param HTMLPurifier_Config $config
+ * @param HTMLPurifier_Context $context
+ * @return bool|string
+ */
+ public function validate($value, $config, $context)
+ {
+ $value = $this->parseCDATA($value);
+ if ($value === 'none') {
+ return $value;
+ }
+ // if we looped this we could support multiple filters
+ $function_length = strcspn($value, '(');
+ $function = trim(substr($value, 0, $function_length));
+ if ($function !== 'alpha' &&
+ $function !== 'Alpha' &&
+ $function !== 'progid:DXImageTransform.Microsoft.Alpha'
+ ) {
+ return false;
+ }
+ $cursor = $function_length + 1;
+ $parameters_length = strcspn($value, ')', $cursor);
+ $parameters = substr($value, $cursor, $parameters_length);
+ $params = explode(',', $parameters);
+ $ret_params = array();
+ $lookup = array();
+ foreach ($params as $param) {
+ list($key, $value) = explode('=', $param);
+ $key = trim($key);
+ $value = trim($value);
+ if (isset($lookup[$key])) {
+ continue;
+ }
+ if ($key !== 'opacity') {
+ continue;
+ }
+ $value = $this->intValidator->validate($value, $config, $context);
+ if ($value === false) {
+ continue;
+ }
+ $int = (int)$value;
+ if ($int > 100) {
+ $value = '100';
+ }
+ if ($int < 0) {
+ $value = '0';
+ }
+ $ret_params[] = "$key=$value";
+ $lookup[$key] = true;
+ }
+ $ret_parameters = implode(',', $ret_params);
+ $ret_function = "$function($ret_parameters)";
+ return $ret_function;
+ }
+}
+
+// vim: et sw=4 sts=4