LibWeb+WebContent: Move Serenity EventLoop and Font plugins into LibWeb

These are exactly what's wanted by headless-browser too, so this saves
us some duplication. LibWeb already links LibCore so it should not
cause any issues for Ladybird.

Userland/Libraries/LibWeb/Platform/EventLoopPluginSerenity.cpp

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "EventLoopPluginSerenity.h"
+#include <AK/Function.h>
+#include <AK/NonnullRefPtr.h>
+#include <LibCore/EventLoop.h>
+#include <LibWeb/Platform/TimerSerenity.h>
+
+namespace Web::Platform {
+
+EventLoopPluginSerenity::EventLoopPluginSerenity() = default;
+EventLoopPluginSerenity::~EventLoopPluginSerenity() = default;
+
+void EventLoopPluginSerenity::spin_until(Function<bool()> goal_condition)
+{
+    Core::EventLoop::current().spin_until(move(goal_condition));
+}
+
+void EventLoopPluginSerenity::deferred_invoke(Function<void()> function)
+{
+    VERIFY(function);
+    Core::deferred_invoke(move(function));
+}
+
+NonnullRefPtr<Timer> EventLoopPluginSerenity::create_timer()
+{
+    return TimerSerenity::create();
+}
+
+}

Userland/Libraries/LibWeb/Platform/EventLoopPluginSerenity.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/Platform/EventLoopPlugin.h>
+
+namespace Web::Platform {
+
+class EventLoopPluginSerenity final : public Web::Platform::EventLoopPlugin {
+public:
+    EventLoopPluginSerenity();
+    virtual ~EventLoopPluginSerenity() override;
+
+    virtual void spin_until(Function<bool()> goal_condition) override;
+    virtual void deferred_invoke(Function<void()>) override;
+    virtual NonnullRefPtr<Timer> create_timer() override;
+};
+
+}

Userland/Libraries/LibWeb/Platform/FontPluginSerenity.cpp

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "FontPluginSerenity.h"
+#include <AK/String.h>
+#include <LibGfx/Font/FontDatabase.h>
+
+namespace Web::Platform {
+
+FontPluginSerenity::FontPluginSerenity()
+{
+}
+
+FontPluginSerenity::~FontPluginSerenity() = default;
+
+Gfx::Font& FontPluginSerenity::default_font()
+{
+    return Gfx::FontDatabase::default_font();
+}
+
+Gfx::Font& FontPluginSerenity::default_fixed_width_font()
+{
+    return Gfx::FontDatabase::default_fixed_width_font();
+}
+
+String FontPluginSerenity::generic_font_name(GenericFont generic_font)
+{
+    // FIXME: Replace hard-coded font names with a relevant call to FontDatabase.
+    // Currently, we cannot request the default font's name, or request it at a specific size and weight.
+    // So, hard-coded font names it is.
+    switch (generic_font) {
+    case GenericFont::SansSerif:
+    case GenericFont::UiSansSerif:
+    case GenericFont::Cursive:
+    case GenericFont::UiRounded:
+        return "Katica";
+    case GenericFont::Monospace:
+    case GenericFont::UiMonospace:
+        return "Csilla";
+    case GenericFont::Serif:
+    case GenericFont::UiSerif:
+        return "Roman";
+    case GenericFont::Fantasy:
+        return "Comic Book";
+    case GenericFont::__Count:
+        VERIFY_NOT_REACHED();
+    }
+    VERIFY_NOT_REACHED();
+}
+
+}

Userland/Libraries/LibWeb/Platform/FontPluginSerenity.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Vector.h>
+#include <LibWeb/Platform/FontPlugin.h>
+
+namespace Web::Platform {
+
+class FontPluginSerenity final : public FontPlugin {
+public:
+    FontPluginSerenity();
+    virtual ~FontPluginSerenity();
+
+    virtual Gfx::Font& default_font() override;
+    virtual Gfx::Font& default_fixed_width_font() override;
+    virtual String generic_font_name(GenericFont) override;
+};
+
+}

Userland/Libraries/LibWeb/Platform/TimerSerenity.cpp

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "TimerSerenity.h"
+#include <AK/NonnullRefPtr.h>
+#include <LibCore/Timer.h>
+
+namespace Web::Platform {
+
+NonnullRefPtr<TimerSerenity> TimerSerenity::create()
+{
+    return adopt_ref(*new TimerSerenity);
+}
+
+TimerSerenity::TimerSerenity()
+    : m_timer(Core::Timer::construct())
+{
+    m_timer->on_timeout = [this] {
+        if (on_timeout)
+            on_timeout();
+    };
+}
+
+TimerSerenity::~TimerSerenity() = default;
+
+void TimerSerenity::start()
+{
+    m_timer->start();
+}
+
+void TimerSerenity::start(int interval_ms)
+{
+    m_timer->start(interval_ms);
+}
+
+void TimerSerenity::restart()
+{
+    m_timer->restart();
+}
+
+void TimerSerenity::restart(int interval_ms)
+{
+    m_timer->restart(interval_ms);
+}
+
+void TimerSerenity::stop()
+{
+    m_timer->stop();
+}
+
+void TimerSerenity::set_active(bool active)
+{
+    m_timer->set_active(active);
+}
+
+bool TimerSerenity::is_active() const
+{
+    return m_timer->is_active();
+}
+
+int TimerSerenity::interval() const
+{
+    return m_timer->interval();
+}
+
+void TimerSerenity::set_interval(int interval_ms)
+{
+    m_timer->set_interval(interval_ms);
+}
+
+bool TimerSerenity::is_single_shot() const
+{
+    return m_timer->is_single_shot();
+}
+
+void TimerSerenity::set_single_shot(bool single_shot)
+{
+    m_timer->set_single_shot(single_shot);
+}
+
+}

Userland/Libraries/LibWeb/Platform/TimerSerenity.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/NonnullRefPtr.h>
+#include <LibCore/Forward.h>
+#include <LibWeb/Platform/Timer.h>
+
+namespace Web::Platform {
+
+class TimerSerenity final : public Timer {
+public:
+    static NonnullRefPtr<TimerSerenity> create();
+
+    virtual ~TimerSerenity();
+
+    virtual void start() override;
+    virtual void start(int interval_ms) override;
+    virtual void restart() override;
+    virtual void restart(int interval_ms) override;
+    virtual void stop() override;
+
+    virtual void set_active(bool) override;
+
+    virtual bool is_active() const override;
+    virtual int interval() const override;
+    virtual void set_interval(int interval_ms) override;
+
+    virtual bool is_single_shot() const override;
+    virtual void set_single_shot(bool) override;
+
+private:
+    TimerSerenity();
+
+    NonnullRefPtr<Core::Timer> m_timer;
+};
+
+}