LibWeb+WebContent: Add APIs to control video playback state

This allows for the browser process to control the play/pause state,
whether we paint user agent controls on the video, and whether the video
loops when it finishes playing.

Userland/Services/WebContent/ConnectionFromClient.cpp

@@ -756,6 +756,21 @@ void ConnectionFromClient::prompt_closed(Optional<String> const& response)
     m_page_host->prompt_closed(response);
 }
 
+void ConnectionFromClient::toggle_video_play_state()
+{
+    m_page_host->toggle_video_play_state().release_value_but_fixme_should_propagate_errors();
+}
+
+void ConnectionFromClient::toggle_video_loop_state()
+{
+    m_page_host->toggle_video_loop_state().release_value_but_fixme_should_propagate_errors();
+}
+
+void ConnectionFromClient::toggle_video_controls_state()
+{
+    m_page_host->toggle_video_controls_state().release_value_but_fixme_should_propagate_errors();
+}
+
 void ConnectionFromClient::inspect_accessibility_tree()
 {
     if (auto* doc = page().top_level_browsing_context().active_document()) {

Userland/Services/WebContent/ConnectionFromClient.h

@@ -95,6 +95,10 @@ private:
     virtual void confirm_closed(bool accepted) override;
     virtual void prompt_closed(Optional<String> const& response) override;
 
+    virtual void toggle_video_play_state() override;
+    virtual void toggle_video_loop_state() override;
+    virtual void toggle_video_controls_state() override;
+
     virtual Messages::WebContentServer::TakeDocumentScreenshotResponse take_document_screenshot() override;
 
     virtual Messages::WebContentServer::GetLocalStorageEntriesResponse get_local_storage_entries() override;

Userland/Services/WebContent/PageHost.cpp

@@ -334,6 +334,21 @@ void PageHost::prompt_closed(Optional<String> response)
     page().prompt_closed(move(response));
 }
 
+Web::WebIDL::ExceptionOr<void> PageHost::toggle_video_play_state()
+{
+    return page().toggle_video_play_state();
+}
+
+Web::WebIDL::ExceptionOr<void> PageHost::toggle_video_loop_state()
+{
+    return page().toggle_video_loop_state();
+}
+
+Web::WebIDL::ExceptionOr<void> PageHost::toggle_video_controls_state()
+{
+    return page().toggle_video_controls_state();
+}
+
 void PageHost::page_did_request_accept_dialog()
 {
     m_client.async_did_request_accept_dialog();

Userland/Services/WebContent/PageHost.h

@@ -49,6 +49,10 @@ public:
     void confirm_closed(bool accepted);
     void prompt_closed(Optional<String> response);
 
+    Web::WebIDL::ExceptionOr<void> toggle_video_play_state();
+    Web::WebIDL::ExceptionOr<void> toggle_video_loop_state();
+    Web::WebIDL::ExceptionOr<void> toggle_video_controls_state();
+
     [[nodiscard]] Gfx::Color background_color() const;
 
 private:

Userland/Services/WebContent/WebContentServer.ipc

@@ -76,4 +76,8 @@ endpoint WebContentServer
     alert_closed() =|
     confirm_closed(bool accepted) =|
     prompt_closed(Optional<String> response) =|
+
+    toggle_video_play_state() =|
+    toggle_video_loop_state() =|
+    toggle_video_controls_state() =|
 }