LibWeb: Implement ModuleMap and expose it on EnvironmentSettingsObject

This patch adds the ModuleMap class used to keep track of the type and url of a module as well as the fetching state associated. Each environment settings object now also has a module map.
Author: https://github.com/networkException Commit: 992311c0ee Pull-request: https://github.com/SerenityOS/serenity/pull/15275 Reviewed-by: https://github.com/davidot ✅ Reviewed-by: https://github.com/linusg
2025-04-27 23:09:08 +00:00 · 2022-10-03 20:58:36 +02:00 · 2022-10-03 20:58:36 +02:00 · 992311c0ee · 2024-07-17 08:25:15 +09:00
commit 992311c0ee
parent 83554526f0
5 changed files with 143 additions and 1 deletions
--- a/Userland/Libraries/LibWeb/HTML/Scripting/ModuleMap.h
+++ b/Userland/Libraries/LibWeb/HTML/Scripting/ModuleMap.h
@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2022, networkException <networkexception@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/HTML/Scripting/ModuleScript.h>
+
+namespace Web::HTML {
+
+class ModuleLocationTuple {
+public:
+    ModuleLocationTuple(AK::URL url, String type)
+        : m_url(move(url))
+        , m_type(move(type))
+    {
+    }
+
+    AK::URL const& url() const { return m_url; };
+    String const& type() const { return m_type; }
+
+    bool operator==(ModuleLocationTuple const& other) const
+    {
+        return other.url() == m_url && other.type() == m_type;
+    };
+
+private:
+    AK::URL m_url;
+    String m_type;
+};
+
+// https://html.spec.whatwg.org/multipage/webappapis.html#module-map
+class ModuleMap {
+    AK_MAKE_NONCOPYABLE(ModuleMap);
+
+public:
+    ModuleMap() = default;
+    ~ModuleMap() = default;
+
+    enum class EntryType {
+        Fetching,
+        Failed,
+        ModuleScript
+    };
+
+    struct Entry {
+        EntryType type;
+        JavaScriptModuleScript* module_script;
+    };
+
+    bool is_fetching(AK::URL const& url, String const& type) const;
+    bool is_failed(AK::URL const& url, String const& type) const;
+
+    bool is(AK::URL const& url, String const& type, EntryType) const;
+
+    Optional<Entry> get(AK::URL const& url, String const& type) const;
+
+    AK::HashSetResult set(AK::URL const& url, String const& type, Entry);
+
+    void wait_for_change(AK::URL const& url, String const& type, Function<void(Entry)> callback);
+
+private:
+    HashMap<ModuleLocationTuple, Entry> m_values;
+    HashMap<ModuleLocationTuple, Vector<Function<void(Entry)>>> m_callbacks;
+};
+
+}
+
+namespace AK {
+
+template<>
+struct Traits<Web::HTML::ModuleLocationTuple> : public GenericTraits<Web::HTML::ModuleLocationTuple> {
+    static unsigned hash(Web::HTML::ModuleLocationTuple const& tuple)
+    {
+        return pair_int_hash(tuple.url().to_string().hash(), tuple.type().hash());
+    }
+};
+
+}