WebContent: Plumb hovered links from WebContent process over to widget

Also add a little GUI::StatusBar to the demo app so we can see the
hovered link URL's live. :^)

Demos/WebView/WebContentClient.cpp

@@ -98,3 +98,19 @@ void WebContentClient::handle(const Messages::WebContentClient::DidRequestScroll
 #endif
     m_view.notify_server_did_request_scroll_into_view({}, message.rect());
 }
+
+void WebContentClient::handle(const Messages::WebContentClient::DidHoverLink& message)
+{
+#ifdef DEBUG_SPAM
+    dbg() << "handle: WebContentClient::DidHoverLink! url=" << message.url();
+#endif
+    m_view.notify_server_did_hover_link({}, message.url());
+}
+
+void WebContentClient::handle(const Messages::WebContentClient::DidUnhoverLink&)
+{
+#ifdef DEBUG_SPAM
+    dbg() << "handle: WebContentClient::DidUnhoverLink!";
+#endif
+    m_view.notify_server_did_unhover_link({});
+}

Demos/WebView/WebContentClient.h

@@ -51,6 +51,8 @@ private:
     virtual void handle(const Messages::WebContentClient::DidLayout&) override;
     virtual void handle(const Messages::WebContentClient::DidChangeTitle&) override;
     virtual void handle(const Messages::WebContentClient::DidRequestScrollIntoView&) override;
+    virtual void handle(const Messages::WebContentClient::DidHoverLink&) override;
+    virtual void handle(const Messages::WebContentClient::DidUnhoverLink&) override;
 
     WebContentView& m_view;
 };

Demos/WebView/WebContentView.cpp

@@ -125,6 +125,18 @@ void WebContentView::notify_server_did_request_scroll_into_view(Badge<WebContent
     scroll_into_view(rect, true, true);
 }
 
+void WebContentView::notify_server_did_hover_link(Badge<WebContentClient>, const URL& url)
+{
+    if (on_link_hover)
+        on_link_hover(url);
+}
+
+void WebContentView::notify_server_did_unhover_link(Badge<WebContentClient>)
+{
+    if (on_link_hover)
+        on_link_hover({});
+}
+
 void WebContentView::did_scroll()
 {
     client().post_message(Messages::WebContentServer::SetViewportRect(visible_content_rect()));

Demos/WebView/WebContentView.h

@@ -40,6 +40,7 @@ public:
     void load(const URL&);
 
     Function<void(const String&)> on_title_change;
+    Function<void(const URL&)> on_link_hover;
 
     void notify_server_did_layout(Badge<WebContentClient>, const Gfx::IntSize& content_size);
     void notify_server_did_paint(Badge<WebContentClient>, i32 shbuf_id);
@@ -47,6 +48,8 @@ public:
     void notify_server_did_change_selection(Badge<WebContentClient>);
     void notify_server_did_change_title(Badge<WebContentClient>, const String&);
     void notify_server_did_request_scroll_into_view(Badge<WebContentClient>, const Gfx::IntRect&);
+    void notify_server_did_hover_link(Badge<WebContentClient>, const URL&);
+    void notify_server_did_unhover_link(Badge<WebContentClient>);
 
 private:
     WebContentView();

Demos/WebView/main.cpp

@@ -27,6 +27,8 @@
 #include "WebContentView.h"
 #include <AK/URL.h>
 #include <LibGUI/Application.h>
+#include <LibGUI/BoxLayout.h>
+#include <LibGUI/StatusBar.h>
 #include <LibGUI/Widget.h>
 #include <LibGUI/Window.h>
 
@@ -34,7 +36,11 @@ int main(int argc, char** argv)
 {
     auto app = GUI::Application::construct(argc, argv);
     auto window = GUI::Window::construct();
-    auto& view = window->set_main_widget<WebContentView>();
+    auto& main_widget = window->set_main_widget<GUI::Widget>();
+    main_widget.set_fill_with_background_color(true);
+    main_widget.set_layout<GUI::VerticalBoxLayout>();
+    auto& view = main_widget.add<WebContentView>();
+    auto& statusbar = main_widget.add<GUI::StatusBar>();
     window->set_title("WebView");
     window->set_rect(100, 100, 640, 480);
     window->show();
@@ -43,6 +49,13 @@ int main(int argc, char** argv)
         window->set_title(String::format("%s - WebView", title.characters()));
     };
 
+    view.on_link_hover = [&](auto& url) {
+        if (url.is_valid())
+            statusbar.set_text(url.to_string());
+        else
+            statusbar.set_text("");
+    };
+
     view.load("file:///res/html/misc/welcome.html");
 
     return app->exec();

Services/WebContent/PageHost.cpp

@@ -134,4 +134,14 @@ void PageHost::page_did_request_scroll_into_view(const Gfx::IntRect& rect)
     m_client.post_message(Messages::WebContentClient::DidRequestScrollIntoView(rect));
 }
 
+void PageHost::page_did_hover_link(const URL& url)
+{
+    m_client.post_message(Messages::WebContentClient::DidHoverLink(url));
+}
+
+void PageHost::page_did_unhover_link()
+{
+    m_client.post_message(Messages::WebContentClient::DidUnhoverLink());
+}
+
 }

Services/WebContent/PageHost.h

@@ -56,6 +56,8 @@ private:
     virtual void page_did_layout() override;
     virtual void page_did_change_title(const String&) override;
     virtual void page_did_request_scroll_into_view(const Gfx::IntRect&) override;
+    virtual void page_did_hover_link(const URL&) override;
+    virtual void page_did_unhover_link() override;
 
     explicit PageHost(ClientConnection&);
 

Services/WebContent/WebContentClient.ipc

@@ -7,4 +7,6 @@ endpoint WebContentClient = 90
     DidLayout(Gfx::IntSize content_size) =|
     DidChangeTitle(String title) =|
     DidRequestScrollIntoView(Gfx::IntRect rect) =|
+    DidHoverLink(URL url) =|
+    DidUnhoverLink() =|
 }