LibWeb+WebContent: Add abstraction layer for event loop and timers

Instead of using Core::EventLoop and Core::Timer directly, LibWeb now
goes through a Web::Platform abstraction layer instead.

This will allow us to plug in Qt's event loop (and QTimer) over in
Ladybird, to avoid having to deal with multiple event loops.

Userland/Libraries/LibWeb/HTML/AnimationFrameCallbackDriver.h

@@ -8,8 +8,8 @@
 
 #include <AK/Function.h>
 #include <AK/IDAllocator.h>
-#include <LibCore/Timer.h>
 #include <LibWeb/HTML/EventLoop/EventLoop.h>
+#include <LibWeb/Platform/Timer.h>
 
 namespace Web::HTML {
 
@@ -18,7 +18,7 @@ struct AnimationFrameCallbackDriver {
 
     AnimationFrameCallbackDriver()
     {
-        m_timer = Core::Timer::create_single_shot(16, [] {
+        m_timer = Platform::Timer::create_single_shot(16, [] {
             HTML::main_thread_event_loop().schedule();
         });
     }
@@ -57,7 +57,7 @@ struct AnimationFrameCallbackDriver {
 private:
     HashMap<i32, Callback> m_callbacks;
     IDAllocator m_id_allocator;
-    RefPtr<Core::Timer> m_timer;
+    RefPtr<Platform::Timer> m_timer;
 };
 
 }

Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp

@@ -229,7 +229,7 @@ BrowsingContext::BrowsingContext(Page& page, HTML::BrowsingContextContainer* con
     , m_event_handler({}, *this)
     , m_container(container)
 {
-    m_cursor_blink_timer = Core::Timer::construct(500, [this] {
+    m_cursor_blink_timer = Platform::Timer::create_repeating(500, [this] {
         if (!is_focused_context())
             return;
         if (m_cursor_position.node() && m_cursor_position.node()->layout_node()) {

Userland/Libraries/LibWeb/HTML/BrowsingContext.h

@@ -10,7 +10,6 @@
 #include <AK/Noncopyable.h>
 #include <AK/RefPtr.h>
 #include <AK/WeakPtr.h>
-#include <LibCore/Timer.h>
 #include <LibGfx/Bitmap.h>
 #include <LibGfx/Rect.h>
 #include <LibGfx/Size.h>
@@ -20,6 +19,7 @@
 #include <LibWeb/HTML/SessionHistoryEntry.h>
 #include <LibWeb/Loader/FrameLoader.h>
 #include <LibWeb/Page/EventHandler.h>
+#include <LibWeb/Platform/Timer.h>
 #include <LibWeb/TreeNode.h>
 
 namespace Web::HTML {
@@ -148,7 +148,7 @@ private:
     Gfx::IntPoint m_viewport_scroll_offset;
 
     DOM::Position m_cursor_position;
-    RefPtr<Core::Timer> m_cursor_blink_timer;
+    RefPtr<Platform::Timer> m_cursor_blink_timer;
     bool m_cursor_blink_state { false };
 
     HashTable<ViewportClient*> m_viewport_clients;

Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp

@@ -5,8 +5,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <LibCore/EventLoop.h>
-#include <LibCore/Timer.h>
 #include <LibJS/Runtime/VM.h>
 #include <LibWeb/Bindings/MainThreadVM.h>
 #include <LibWeb/DOM/Document.h>
@@ -15,6 +13,8 @@
 #include <LibWeb/HTML/Scripting/Environments.h>
 #include <LibWeb/HTML/Window.h>
 #include <LibWeb/HighResolutionTime/Performance.h>
+#include <LibWeb/Platform/EventLoopPlugin.h>
+#include <LibWeb/Platform/Timer.h>
 
 namespace Web::HTML {
 
@@ -29,7 +29,7 @@ EventLoop::~EventLoop() = default;
 void EventLoop::schedule()
 {
     if (!m_system_event_loop_timer) {
-        m_system_event_loop_timer = Core::Timer::create_single_shot(0, [this] {
+        m_system_event_loop_timer = Platform::Timer::create_single_shot(0, [this] {
             process();
         });
     }
@@ -74,13 +74,7 @@ void EventLoop::spin_until(Function<bool()> goal_condition)
     //       NOTE: This is achieved by returning from the function.
 
     //    1. Wait until the condition goal is met.
-    Core::EventLoop loop;
-    loop.spin_until([&]() -> bool {
-        if (goal_condition())
-            return true;
-
-        return goal_condition();
-    });
+    Platform::EventLoopPlugin::the().spin_until(move(goal_condition));
 
     // 7. Stop task, allowing whatever algorithm that invoked it to resume.
     // NOTE: This is achieved by returning from the function.

Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.h

@@ -84,7 +84,7 @@ private:
 
     JS::VM* m_vm { nullptr };
 
-    RefPtr<Core::Timer> m_system_event_loop_timer;
+    RefPtr<Platform::Timer> m_system_event_loop_timer;
 
     // https://html.spec.whatwg.org/#performing-a-microtask-checkpoint
     bool m_performing_a_microtask_checkpoint { false };

Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.cpp

@@ -4,14 +4,14 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <LibCore/Timer.h>
 #include <LibWeb/HTML/HTMLBlinkElement.h>
+#include <LibWeb/Platform/Timer.h>
 
 namespace Web::HTML {
 
 HTMLBlinkElement::HTMLBlinkElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
-    , m_timer(Core::Timer::construct())
+    , m_timer(Platform::Timer::create())
 {
     m_timer->set_interval(500);
     m_timer->on_timeout = [this] { blink(); };

Userland/Libraries/LibWeb/HTML/HTMLBlinkElement.h

@@ -22,7 +22,7 @@ private:
 
     void blink();
 
-    NonnullRefPtr<Core::Timer> m_timer;
+    NonnullRefPtr<Platform::Timer> m_timer;
 };
 
 }

Userland/Libraries/LibWeb/HTML/Timer.cpp

@@ -4,9 +4,9 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <LibCore/Timer.h>
 #include <LibWeb/HTML/Timer.h>
 #include <LibWeb/HTML/Window.h>
+#include <LibWeb/Platform/Timer.h>
 
 namespace Web::HTML {
 
@@ -20,7 +20,7 @@ Timer::Timer(Window& window, i32 milliseconds, Function<void()> callback, i32 id
     , m_callback(move(callback))
     , m_id(id)
 {
-    m_timer = Core::Timer::create_single_shot(milliseconds, [this] {
+    m_timer = Platform::Timer::create_single_shot(milliseconds, [this] {
         m_callback();
     });
 }

Userland/Libraries/LibWeb/HTML/Timer.h

@@ -30,7 +30,7 @@ private:
 
     virtual void visit_edges(Cell::Visitor&) override;
 
-    RefPtr<Core::Timer> m_timer;
+    RefPtr<Platform::Timer> m_timer;
     JS::NonnullGCPtr<Window> m_window;
     Function<void()> m_callback;
     i32 m_id { 0 };

Userland/Libraries/LibWeb/HTML/Window.h

@@ -8,7 +8,9 @@
 
 #include <AK/Badge.h>
 #include <AK/IDAllocator.h>
+#include <AK/NonnullRefPtrVector.h>
 #include <AK/RefPtr.h>
+#include <AK/TypeCasts.h>
 #include <AK/URL.h>
 #include <LibJS/Heap/Heap.h>
 #include <LibWeb/Bindings/CrossOriginAbstractOperations.h>