WebContent: Plumb title changes over to the WebContentView

WebContentView now fires its on_title_change hook, like Web::PageView.
We use this in the WebView test app to update the window title. :^)

Demos/WebView/WebContentClient.cpp

@@ -82,3 +82,11 @@ void WebContentClient::handle(const Messages::WebContentClient::DidLayout& messa
 #endif
     m_view.notify_server_did_layout({}, message.content_size());
 }
+
+void WebContentClient::handle(const Messages::WebContentClient::DidChangeTitle& message)
+{
+#ifdef DEBUG_SPAM
+    dbg() << "handle: WebContentClient::DidChangeTitle! title=" << message.title();
+#endif
+    m_view.notify_server_did_change_title({}, message.title());
+}

Demos/WebView/WebContentClient.h

@@ -49,6 +49,7 @@ private:
     virtual void handle(const Messages::WebContentClient::DidInvalidateContentRect&) override;
     virtual void handle(const Messages::WebContentClient::DidChangeSelection&) override;
     virtual void handle(const Messages::WebContentClient::DidLayout&) override;
+    virtual void handle(const Messages::WebContentClient::DidChangeTitle&) override;
 
     WebContentView& m_view;
 };

Demos/WebView/WebContentView.cpp

@@ -108,6 +108,12 @@ void WebContentView::notify_server_did_layout(Badge<WebContentClient>, const Gfx
     set_content_size(content_size);
 }
 
+void WebContentView::notify_server_did_change_title(Badge<WebContentClient>, const String& title)
+{
+    if (on_title_change)
+        on_title_change(title);
+}
+
 void WebContentView::did_scroll()
 {
     client().post_message(Messages::WebContentServer::SetViewportRect(Gfx::IntRect({ horizontal_scrollbar().value(), vertical_scrollbar().value() }, size())));

Demos/WebView/WebContentView.h

@@ -39,10 +39,13 @@ public:
 
     void load(const URL&);
 
+    Function<void(const String&)> on_title_change;
+
     void notify_server_did_layout(Badge<WebContentClient>, const Gfx::IntSize& content_size);
     void notify_server_did_paint(Badge<WebContentClient>, i32 shbuf_id);
     void notify_server_did_invalidate_content_rect(Badge<WebContentClient>, const Gfx::IntRect&);
     void notify_server_did_change_selection(Badge<WebContentClient>);
+    void notify_server_did_change_title(Badge<WebContentClient>, const String&);
 
 private:
     WebContentView();

Demos/WebView/main.cpp

@@ -35,10 +35,14 @@ 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>();
-    window->set_title("WebContentView");
+    window->set_title("WebView");
     window->set_rect(100, 100, 640, 480);
     window->show();
 
+    view.on_title_change = [&](auto& title) {
+        window->set_title(String::format("%s - WebView", title.characters()));
+    };
+
     view.load("file:///res/html/misc/welcome.html");
 
     return app->exec();

Services/WebContent/PageHost.cpp

@@ -124,4 +124,9 @@ void PageHost::page_did_layout()
     m_client.post_message(Messages::WebContentClient::DidLayout(content_size));
 }
 
+void PageHost::page_did_change_title(const String& title)
+{
+    m_client.post_message(Messages::WebContentClient::DidChangeTitle(title));
+}
+
 }

Services/WebContent/PageHost.h

@@ -54,6 +54,7 @@ private:
     virtual void page_did_invalidate(const Gfx::IntRect&) override;
     virtual void page_did_change_selection() override;
     virtual void page_did_layout() override;
+    virtual void page_did_change_title(const String&) override;
 
     explicit PageHost(ClientConnection&);
 

Services/WebContent/WebContentClient.ipc

@@ -5,4 +5,5 @@ endpoint WebContentClient = 90
     DidInvalidateContentRect(Gfx::IntRect content_rect) =|
     DidChangeSelection() =|
     DidLayout(Gfx::IntSize content_size) =|
+    DidChangeTitle(String title) =|
 }