:arrow_up: Update HTML Purifier library.

Updated HTML Purifier from 4.6.0 to 4.9.2 with better PHP7 compatibility.
Used composer to manage this library.

1 files changed, 71 insertions, 0 deletions

diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Multiple.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Multiple.php
new file mode 100644
index 000000000..e707f871c
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Multiple.php
@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * Framework class for strings that involve multiple values.
+ *
+ * Certain CSS properties such as border-width and margin allow multiple
+ * lengths to be specified.  This class can take a vanilla border-width
+ * definition and multiply it, usually into a max of four.
+ *
+ * @note Even though the CSS specification isn't clear about it, inherit
+ *       can only be used alone: it will never manifest as part of a multi
+ *       shorthand declaration.  Thus, this class does not allow inherit.
+ */
+class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
+{
+    /**
+     * Instance of component definition to defer validation to.
+     * @type HTMLPurifier_AttrDef
+     * @todo Make protected
+     */
+    public $single;
+
+    /**
+     * Max number of values allowed.
+     * @todo Make protected
+     */
+    public $max;
+
+    /**
+     * @param HTMLPurifier_AttrDef $single HTMLPurifier_AttrDef to multiply
+     * @param int $max Max number of values allowed (usually four)
+     */
+    public function __construct($single, $max = 4)
+    {
+        $this->single = $single;
+        $this->max = $max;
+    }
+
+    /**
+     * @param string $string
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string
+     */
+    public function validate($string, $config, $context)
+    {
+        $string = $this->mungeRgb($this->parseCDATA($string));
+        if ($string === '') {
+            return false;
+        }
+        $parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
+        $length = count($parts);
+        $final = '';
+        for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
+            if (ctype_space($parts[$i])) {
+                continue;
+            }
+            $result = $this->single->validate($parts[$i], $config, $context);
+            if ($result !== false) {
+                $final .= $result . ' ';
+                $num++;
+            }
+        }
+        if ($final === '') {
+            return false;
+        }
+        return rtrim($final);
+    }
+}
+
+// vim: et sw=4 sts=4