1 files changed, 138 insertions, 0 deletions
diff --git a/library/vendor/dompdf/vendor/sabberworm/php-css-parser/src/Property/Selector.php b/library/vendor/dompdf/vendor/sabberworm/php-css-parser/src/Property/Selector.php
new file mode 100644
index 0000000..70c9b2f
--- /dev/null
+++ b/library/vendor/dompdf/vendor/sabberworm/php-css-parser/src/Property/Selector.php
@@ -0,0 +1,138 @@
+<?php
+
+namespace Sabberworm\CSS\Property;
+
+/**
+ * Class representing a single CSS selector. Selectors have to be split by the comma prior to being passed into this
+ * class.
+ */
+class Selector
+{
+    /**
+     * regexp for specificity calculations
+     *
+     * @var string
+     */
+    const NON_ID_ATTRIBUTES_AND_PSEUDO_CLASSES_RX = '/
+        (\.[\w]+)                   # classes
+        |
+        \[(\w+)                     # attributes
+        |
+        (\:(                        # pseudo classes
+            link|visited|active
+            |hover|focus
+            |lang
+            |target
+            |enabled|disabled|checked|indeterminate
+            |root
+            |nth-child|nth-last-child|nth-of-type|nth-last-of-type
+            |first-child|last-child|first-of-type|last-of-type
+            |only-child|only-of-type
+            |empty|contains
+        ))
+        /ix';
+
+    /**
+     * regexp for specificity calculations
+     *
+     * @var string
+     */
+    const ELEMENTS_AND_PSEUDO_ELEMENTS_RX = '/
+        ((^|[\s\+\>\~]+)[\w]+   # elements
+        |
+        \:{1,2}(                # pseudo-elements
+            after|before|first-letter|first-line|selection
+        ))
+        /ix';
+
+    /**
+     * regexp for specificity calculations
+     *
+     * @var string
+     */
+    const SELECTOR_VALIDATION_RX = '/
+        ^(
+            (?:
+                [a-zA-Z0-9\x{00A0}-\x{FFFF}_^$|*="\'~\[\]()\-\s\.:#+>]* # any sequence of valid unescaped characters
+                (?:\\\\.)?                                              # a single escaped character
+                (?:([\'"]).*?(?<!\\\\)\2)?                              # a quoted text like [id="example"]
+            )*
+        )$
+        /ux';
+
+    /**
+     * @var string
+     */
+    private $sSelector;
+
+    /**
+     * @var int|null
+     */
+    private $iSpecificity;
+
+    /**
+     * @param string $sSelector
+     *
+     * @return bool
+     */
+    public static function isValid($sSelector)
+    {
+        return preg_match(static::SELECTOR_VALIDATION_RX, $sSelector);
+    }
+
+    /**
+     * @param string $sSelector
+     * @param bool $bCalculateSpecificity
+     */
+    public function __construct($sSelector, $bCalculateSpecificity = false)
+    {
+        $this->setSelector($sSelector);
+        if ($bCalculateSpecificity) {
+            $this->getSpecificity();
+        }
+    }
+
+    /**
+     * @return string
+     */
+    public function getSelector()
+    {
+        return $this->sSelector;
+    }
+
+    /**
+     * @param string $sSelector
+     *
+     * @return void
+     */
+    public function setSelector($sSelector)
+    {
+        $this->sSelector = trim($sSelector);
+        $this->iSpecificity = null;
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->getSelector();
+    }
+
+    /**
+     * @return int
+     */
+    public function getSpecificity()
+    {
+        if ($this->iSpecificity === null) {
+            $a = 0;
+            /// @todo should exclude \# as well as "#"
+            $aMatches = null;
+            $b = substr_count($this->sSelector, '#');
+            $c = preg_match_all(self::NON_ID_ATTRIBUTES_AND_PSEUDO_CLASSES_RX, $this->sSelector, $aMatches);
+            $d = preg_match_all(self::ELEMENTS_AND_PSEUDO_ELEMENTS_RX, $this->sSelector, $aMatches);
+            $this->iSpecificity = ($a * 1000) + ($b * 100) + ($c * 10) + $d;
+        }
+        return $this->iSpecificity;
+    }
+}