LibDevTools+LibWebView: Implement getting document style sheets

Author: https://github.com/trflynn89
Commit: 0b86bcfba7
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3920

Libraries/LibDevTools/Actors/StyleSheetsActor.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/HashMap.h>
+#include <AK/NonnullRefPtr.h>
+#include <LibDevTools/Actor.h>
+#include <LibWeb/Forward.h>
+
+namespace DevTools {
+
+class StyleSheetsActor final : public Actor {
+public:
+    static constexpr auto base_name = "style-sheets"sv;
+
+    static NonnullRefPtr<StyleSheetsActor> create(DevToolsServer&, String name, WeakPtr<TabActor>);
+    virtual ~StyleSheetsActor() override;
+
+    void set_style_sheets(Vector<Web::CSS::StyleSheetIdentifier>);
+
+private:
+    StyleSheetsActor(DevToolsServer&, String name, WeakPtr<TabActor>);
+
+    virtual void handle_message(Message const&) override;
+
+    void style_sheet_source_received(Web::CSS::StyleSheetIdentifier const&, String source);
+
+    WeakPtr<TabActor> m_tab;
+
+    Vector<Web::CSS::StyleSheetIdentifier> m_style_sheets;
+    HashMap<size_t, Message> m_pending_style_sheet_source_requests;
+};
+
+}