1 files changed, 109 insertions, 0 deletions
diff --git a/library/Icinga/Less/ColorProp.php b/library/Icinga/Less/ColorProp.php
new file mode 100644
index 0000000..3f83c5e
--- /dev/null
+++ b/library/Icinga/Less/ColorProp.php
@@ -0,0 +1,109 @@
+<?php
+/* Icinga Web 2 | (c) 2022 Icinga GmbH | GPLv2+ */
+
+namespace Icinga\Less;
+
+use Less_Tree_Call;
+use Less_Tree_Color;
+use Less_Tree_Keyword;
+
+/**
+ * ColorProp renders Less colors as CSS var() function calls
+ *
+ * It extends {@link Less_Tree_Color} so that Less functions that take a Less_Tree_Color as an argument do not fail.
+ */
+class ColorProp extends Less_Tree_Color
+{
+    /** @var Less_Tree_Color Color with which we created the ColorProp */
+    protected $color;
+
+    /** @var int */
+    protected $index;
+
+    /** @var string Color variable name */
+    protected $name;
+
+    public function __construct()
+    {
+    }
+
+    /**
+     * @param Less_Tree_Color $color
+     *
+     * @return static
+     */
+    public static function fromColor(Less_Tree_Color $color)
+    {
+        $self = new static();
+        $self->color = $color;
+
+        foreach ($color as $k => $v) {
+            if ($k === 'name') {
+                $self->setName($v); // Removes the @ char from the name
+            } else {
+                $self->$k = $v;
+            }
+        }
+
+        return $self;
+    }
+
+    /**
+     * @return int
+     */
+    public function getIndex()
+    {
+        return $this->index;
+    }
+
+    /**
+     * @param int $index
+     *
+     * @return $this
+     */
+    public function setIndex($index)
+    {
+        $this->index = $index;
+
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param string $name
+     *
+     * @return $this
+     */
+    public function setName($name)
+    {
+        if ($name[0] === '@') {
+            $name = substr($name, 1);
+        }
+
+        $this->name = $name;
+
+        return $this;
+    }
+
+    public function genCSS($output)
+    {
+        $css = (new Less_Tree_Call(
+            'var',
+            [
+                new Less_Tree_Keyword('--' . $this->getName()),
+                // Use the Less_Tree_Color with which we created the ColorProp so that we don't get into genCSS() loops.
+                $this->color
+            ],
+            $this->getIndex()
+        ))->toCSS();
+
+        $output->add($css);
+    }
+}