1 files changed, 71 insertions, 0 deletions
diff --git a/library/Icinga/Less/ColorPropOrVariable.php b/library/Icinga/Less/ColorPropOrVariable.php
new file mode 100644
index 0000000..7918674
--- /dev/null
+++ b/library/Icinga/Less/ColorPropOrVariable.php
@@ -0,0 +1,71 @@
+<?php
+/* Icinga Web 2 | (c) 2022 Icinga GmbH | GPLv2+ */
+
+namespace Icinga\Less;
+
+use Less_Tree;
+use Less_Tree_Color;
+use Less_Tree_Variable;
+
+/**
+ * Compile a Less variable to {@link ColorProp} if it is a color
+ */
+class ColorPropOrVariable extends Less_Tree
+{
+    public $type = 'Variable';
+
+    /** @var Less_Tree_Variable */
+    protected $variable;
+
+    /**
+     * @return Less_Tree_Variable
+     */
+    public function getVariable()
+    {
+        return $this->variable;
+    }
+
+    /**
+     * @param Less_Tree_Variable $variable
+     *
+     * @return $this
+     */
+    public function setVariable(Less_Tree_Variable $variable)
+    {
+        $this->variable = $variable;
+
+        return $this;
+    }
+
+    public function compile($env)
+    {
+        $v = $this->getVariable();
+
+        if ($v->name[1] === '@') {
+            // Evaluate variable variable as in Less_Tree_Variable:28.
+            $vv = new Less_Tree_Variable(substr($v->name, 1), $v->index + 1, $v->currentFileInfo);
+            // Overwrite the name so that the variable variable is not evaluated again.
+            $result = $vv->compile($env);
+            if ($result instanceof DeferredColorProp) {
+                $v->name = $result->name;
+            } else {
+                $v->name = '@' . $result->value;
+            }
+        }
+
+        $compiled = $v->compile($env);
+
+        if ($compiled instanceof ColorProp) {
+            // We may already have a ColorProp, which is the case with mixin calls.
+            return $compiled;
+        }
+
+        if ($compiled instanceof Less_Tree_Color) {
+            return ColorProp::fromColor($compiled)
+                ->setIndex($v->index)
+                ->setName($v->name);
+        }
+
+        return $compiled;
+    }
+}