LibWeb: Add CSSConditionRule

https://www.w3.org/TR/css-conditional-3/#the-cssconditionrule-interface

This simply exposes a condition string, which is implemented differently
in each sub-class.

1 files changed, 29 insertions, 0 deletions

diff --git a/Userland/Libraries/LibWeb/CSS/CSSConditionRule.h b/Userland/Libraries/LibWeb/CSS/CSSConditionRule.h
new file mode 100644
index 0000000000..7fb5b55caa
--- /dev/null
+++ b/Userland/Libraries/LibWeb/CSS/CSSConditionRule.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/NonnullRefPtr.h>
+#include <LibWeb/CSS/CSSGroupingRule.h>
+#include <LibWeb/Forward.h>
+
+namespace Web::CSS {
+
+class CSSConditionRule : public CSSGroupingRule {
+    AK_MAKE_NONCOPYABLE(CSSConditionRule);
+    AK_MAKE_NONMOVABLE(CSSConditionRule);
+
+public:
+    ~CSSConditionRule();
+
+    virtual String condition_text() const = 0;
+    virtual void set_condition_text(String) = 0;
+
+protected:
+    explicit CSSConditionRule(NonnullRefPtrVector<CSSRule>&&);
+};
+
+}