WebContent+WebDriver: Implement `POST /session/{id}/window` endpoint

Userland/Libraries/LibWeb/WebDriver/Client.cpp

@@ -63,6 +63,7 @@ static constexpr auto s_webdriver_endpoints = Array {
     ROUTE(GET, "/session/:session_id/title"sv, get_title),
     ROUTE(GET, "/session/:session_id/window"sv, get_window_handle),
     ROUTE(DELETE, "/session/:session_id/window"sv, close_window),
+    ROUTE(POST, "/session/:session_id/window"sv, switch_to_window),
     ROUTE(GET, "/session/:session_id/window/handles"sv, get_window_handles),
     ROUTE(GET, "/session/:session_id/window/rect"sv, get_window_rect),
     ROUTE(POST, "/session/:session_id/window/rect"sv, set_window_rect),

Userland/Libraries/LibWeb/WebDriver/Client.h

@@ -49,6 +49,7 @@ public:
     // 11. Contexts, https://w3c.github.io/webdriver/#contexts
     virtual Response get_window_handle(Parameters parameters, JsonValue payload) = 0;
     virtual Response close_window(Parameters parameters, JsonValue payload) = 0;
+    virtual Response switch_to_window(Parameters parameters, JsonValue payload) = 0;
     virtual Response get_window_handles(Parameters parameters, JsonValue payload) = 0;
     virtual Response get_window_rect(Parameters parameters, JsonValue payload) = 0;
     virtual Response set_window_rect(Parameters parameters, JsonValue payload) = 0;

Userland/Services/WebContent/WebDriverClient.ipc

@@ -17,6 +17,7 @@ endpoint WebDriverClient {
     get_title() => (Web::WebDriver::Response response)
     get_window_handle() => (Web::WebDriver::Response response)
     close_window() => (Web::WebDriver::Response response)
+    switch_to_window(JsonValue payload) => (Web::WebDriver::Response response)
     get_window_handles() => (Web::WebDriver::Response response)
     get_window_rect() => (Web::WebDriver::Response response)
     set_window_rect(JsonValue payload) => (Web::WebDriver::Response response)

Userland/Services/WebContent/WebDriverConnection.cpp

@@ -481,6 +481,36 @@ Messages::WebDriverClient::CloseWindowResponse WebDriverConnection::close_window
     return get_window_handles().take_response();
 }
 
+// 11.3 Switch to Window, https://w3c.github.io/webdriver/#dfn-switch-to-window
+Messages::WebDriverClient::SwitchToWindowResponse WebDriverConnection::switch_to_window(JsonValue const& payload)
+{
+    // 1. Let handle be the result of getting the property "handle" from the parameters argument.
+    // 2. If handle is undefined, return error with error code invalid argument.
+    auto handle = TRY(get_property(payload, "handle"sv));
+
+    // 3. If there is an active user prompt, that prevents the focusing of another top-level browsing
+    //    context, return error with error code unexpected alert open.
+    if (m_page_client.page().has_pending_dialog())
+        return Web::WebDriver::Error::from_code(Web::WebDriver::ErrorCode::UnexpectedAlertOpen, "A user dialog is open"sv);
+
+    // 4. If handle is equal to the associated window handle for some top-level browsing context in the
+    //    current session, let context be the that browsing context, and set the current top-level
+    //    browsing context with context.
+    //    Otherwise, return error with error code no such window.
+    auto const& maybe_window = m_windows.get(handle);
+
+    if (!maybe_window.has_value())
+        return Web::WebDriver::Error::from_code(Web::WebDriver::ErrorCode::NoSuchWindow, "Window not found");
+
+    m_current_window_handle = handle;
+
+    // FIXME: 5. Update any implementation-specific state that would result from the user selecting the current
+    //          browsing context for interaction, without altering OS-level focus.
+
+    // 6. Return success with data null.
+    return JsonValue {};
+}
+
 // 11.4 Get Window Handles, https://w3c.github.io/webdriver/#dfn-get-window-handles
 Messages::WebDriverClient::GetWindowHandlesResponse WebDriverConnection::get_window_handles()
 {

Userland/Services/WebContent/WebDriverConnection.h

@@ -52,6 +52,7 @@ private:
     virtual Messages::WebDriverClient::GetTitleResponse get_title() override;
     virtual Messages::WebDriverClient::GetWindowHandleResponse get_window_handle() override;
     virtual Messages::WebDriverClient::CloseWindowResponse close_window() override;
+    virtual Messages::WebDriverClient::SwitchToWindowResponse switch_to_window(JsonValue const& payload) override;
     virtual Messages::WebDriverClient::GetWindowHandlesResponse get_window_handles() override;
     virtual Messages::WebDriverClient::GetWindowRectResponse get_window_rect() override;
     virtual Messages::WebDriverClient::SetWindowRectResponse set_window_rect(JsonValue const& payload) override;

Userland/Services/WebDriver/Client.cpp

@@ -322,6 +322,15 @@ Web::WebDriver::Response Client::close_window(Web::WebDriver::Parameters paramet
     return open_windows;
 }
 
+// 11.3 Switch to Window, https://w3c.github.io/webdriver/#dfn-switch-to-window
+// POST /session/{session id}/window
+Web::WebDriver::Response Client::switch_to_window(Web::WebDriver::Parameters parameters, AK::JsonValue payload)
+{
+    dbgln_if(WEBDRIVER_DEBUG, "Handling POST /session/<session_id>/window");
+    auto* session = TRY(find_session_with_id(parameters[0]));
+    return session->web_content_connection().switch_to_window(payload);
+}
+
 // 11.4 Get Window Handles, https://w3c.github.io/webdriver/#dfn-get-window-handles
 // GET /session/{session id}/window/handles
 Web::WebDriver::Response Client::get_window_handles(Web::WebDriver::Parameters parameters, JsonValue)

Userland/Services/WebDriver/Client.h

@@ -46,6 +46,7 @@ private:
     virtual Web::WebDriver::Response get_title(Web::WebDriver::Parameters parameters, JsonValue payload) override;
     virtual Web::WebDriver::Response get_window_handle(Web::WebDriver::Parameters parameters, JsonValue payload) override;
     virtual Web::WebDriver::Response close_window(Web::WebDriver::Parameters parameters, JsonValue payload) override;
+    virtual Web::WebDriver::Response switch_to_window(Web::WebDriver::Parameters parameters, JsonValue payload) override;
     virtual Web::WebDriver::Response get_window_handles(Web::WebDriver::Parameters parameters, JsonValue payload) override;
     virtual Web::WebDriver::Response get_window_rect(Web::WebDriver::Parameters parameters, JsonValue payload) override;
     virtual Web::WebDriver::Response set_window_rect(Web::WebDriver::Parameters parameters, JsonValue payload) override;