Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/CSS/CSSMediaRule.cpp

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
+ * Copyright (c) 2022, Andreas Kling <andreas@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibJS/Runtime/Realm.h>
+#include <LibWeb/Bindings/CSSMediaRulePrototype.h>
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/CSS/CSSMediaRule.h>
+
+namespace Web::CSS {
+
+JS_DEFINE_ALLOCATOR(CSSMediaRule);
+
+JS::NonnullGCPtr<CSSMediaRule> CSSMediaRule::create(JS::Realm& realm, MediaList& media_queries, CSSRuleList& rules)
+{
+    return realm.heap().allocate<CSSMediaRule>(realm, realm, media_queries, rules);
+}
+
+CSSMediaRule::CSSMediaRule(JS::Realm& realm, MediaList& media, CSSRuleList& rules)
+    : CSSConditionRule(realm, rules, Type::Media)
+    , m_media(media)
+{
+}
+
+void CSSMediaRule::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSMediaRule);
+}
+
+void CSSMediaRule::visit_edges(Cell::Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+    visitor.visit(m_media);
+}
+
+String CSSMediaRule::condition_text() const
+{
+    return m_media->media_text();
+}
+
+// https://www.w3.org/TR/cssom-1/#serialize-a-css-rule
+String CSSMediaRule::serialized() const
+{
+    // The result of concatenating the following:
+    StringBuilder builder;
+
+    // 1. The string "@media", followed by a single SPACE (U+0020).
+    builder.append("@media "sv);
+    // 2. The result of performing serialize a media query list on rule’s media query list.
+    builder.append(condition_text());
+    // 3. A single SPACE (U+0020), followed by the string "{", i.e., LEFT CURLY BRACKET (U+007B), followed by a newline.
+    builder.append(" {\n"sv);
+    // 4. The result of performing serialize a CSS rule on each rule in the rule’s cssRules list,
+    //    filtering out empty strings, indenting each item with two spaces, all joined with newline.
+    for (size_t i = 0; i < css_rules().length(); i++) {
+        auto rule = css_rules().item(i);
+        auto result = rule->css_text();
+
+        if (result.is_empty())
+            continue;
+
+        builder.append("  "sv);
+        builder.append(result);
+        builder.append('\n');
+    }
+    // 5. A newline, followed by the string "}", i.e., RIGHT CURLY BRACKET (U+007D)
+    // AD-HOC: All modern browsers omit the ending newline if there are no CSS rules, so let's do the same.
+    //         If there are rules, the required newline will be appended in the for-loop above.
+    builder.append('}');
+
+    return MUST(builder.to_string());
+}
+
+}