LibWebView+WebContent: Implement basic DevTools console support

Author: https://github.com/trflynn89
Commit: ffdce78b7b
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3801
Reviewed-by: https://github.com/AtkinsSJ

Libraries/LibWebView/Application.cpp

@@ -433,4 +433,34 @@ void Application::evaluate_javascript(DevTools::TabDescription const& descriptio
     view->js_console_input(move(script));
 }
 
+void Application::listen_for_console_messages(DevTools::TabDescription const& description, OnConsoleMessageAvailable on_console_message_available, OnReceivedConsoleMessages on_received_console_output) const
+{
+    auto view = ViewImplementation::find_view_by_id(description.id);
+    if (!view.has_value())
+        return;
+
+    view->on_console_message_available = move(on_console_message_available);
+    view->on_received_unstyled_console_messages = move(on_received_console_output);
+    view->js_console_request_messages(0);
+}
+
+void Application::stop_listening_for_console_messages(DevTools::TabDescription const& description) const
+{
+    auto view = ViewImplementation::find_view_by_id(description.id);
+    if (!view.has_value())
+        return;
+
+    view->on_console_message_available = nullptr;
+    view->on_received_unstyled_console_messages = nullptr;
+}
+
+void Application::request_console_messages(DevTools::TabDescription const& description, i32 start_index) const
+{
+    auto view = ViewImplementation::find_view_by_id(description.id);
+    if (!view.has_value())
+        return;
+
+    view->js_console_request_messages(start_index);
+}
+
 }

Libraries/LibWebView/Application.h

@@ -97,6 +97,9 @@ private:
     virtual void highlight_dom_node(DevTools::TabDescription const&, Web::UniqueNodeID, Optional<Web::CSS::Selector::PseudoElement::Type>) const override;
     virtual void clear_highlighted_dom_node(DevTools::TabDescription const&) const override;
     virtual void evaluate_javascript(DevTools::TabDescription const&, String, OnScriptEvaluationComplete) const override;
+    virtual void listen_for_console_messages(DevTools::TabDescription const&, OnConsoleMessageAvailable, OnReceivedConsoleMessages) const override;
+    virtual void stop_listening_for_console_messages(DevTools::TabDescription const&) const override;
+    virtual void request_console_messages(DevTools::TabDescription const&, i32) const override;
 
     static Application* s_the;
 

Libraries/LibWebView/CMakeLists.txt

@@ -4,6 +4,7 @@ set(SOURCES
     Application.cpp
     Attribute.cpp
     ChromeProcess.cpp
+    ConsoleOutput.cpp
     CookieJar.cpp
     Database.cpp
     HelperProcess.cpp

Libraries/LibWebView/ConsoleOutput.cpp

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibIPC/Decoder.h>
+#include <LibIPC/Encoder.h>
+#include <LibWebView/ConsoleOutput.h>
+
+template<>
+ErrorOr<void> IPC::encode(Encoder& encoder, WebView::ConsoleOutput const& console_output)
+{
+    TRY(encoder.encode(console_output.level));
+    TRY(encoder.encode(console_output.timestamp));
+    TRY(encoder.encode(console_output.arguments));
+
+    return {};
+}
+
+template<>
+ErrorOr<WebView::ConsoleOutput> IPC::decode(Decoder& decoder)
+{
+    auto level = TRY(decoder.decode<JS::Console::LogLevel>());
+    auto timestamp = TRY(decoder.decode<UnixDateTime>());
+    auto arguments = TRY(decoder.decode<Vector<JsonValue>>());
+
+    return WebView::ConsoleOutput { level, timestamp, move(arguments) };
+}

Libraries/LibWebView/ConsoleOutput.h

@@ -9,6 +9,7 @@
 #include <AK/JsonValue.h>
 #include <AK/Time.h>
 #include <AK/Vector.h>
+#include <LibIPC/Forward.h>
 #include <LibJS/Console.h>
 
 namespace WebView {
@@ -20,3 +21,13 @@ struct ConsoleOutput {
 };
 
 }
+
+namespace IPC {
+
+template<>
+ErrorOr<void> encode(Encoder&, WebView::ConsoleOutput const&);
+
+template<>
+ErrorOr<WebView::ConsoleOutput> decode(Decoder&);
+
+}

Libraries/LibWebView/ViewImplementation.h

@@ -218,6 +218,7 @@ public:
     Function<void(JsonValue)> on_received_js_console_result;
     Function<void(i32 message_id)> on_console_message_available;
     Function<void(i32 start_index, Vector<String> const& message_types, Vector<String> const& messages)> on_received_styled_console_messages;
+    Function<void(i32 start_index, Vector<ConsoleOutput>)> on_received_unstyled_console_messages;
     Function<void(i32 count_waiting)> on_resource_status_change;
     Function<void()> on_restore_window;
     Function<void(Gfx::IntPoint)> on_reposition_window;

Libraries/LibWebView/WebContentClient.cpp

@@ -385,6 +385,14 @@ void WebContentClient::did_get_styled_js_console_messages(u64 page_id, i32 start
     }
 }
 
+void WebContentClient::did_get_unstyled_js_console_messages(u64 page_id, i32 start_index, Vector<ConsoleOutput> const& console_output)
+{
+    if (auto view = view_for_page_id(page_id); view.has_value()) {
+        if (view->on_received_unstyled_console_messages)
+            view->on_received_unstyled_console_messages(start_index, move(const_cast<Vector<ConsoleOutput>&>(console_output)));
+    }
+}
+
 void WebContentClient::did_request_alert(u64 page_id, String const& message)
 {
     if (auto view = view_for_page_id(page_id); view.has_value()) {

Libraries/LibWebView/WebContentClient.h

@@ -82,6 +82,7 @@ private:
     virtual void did_execute_js_console_input(u64 page_id, JsonValue const&) override;
     virtual void did_output_js_console_message(u64 page_id, i32 message_index) override;
     virtual void did_get_styled_js_console_messages(u64 page_id, i32 start_index, Vector<String> const& message_types, Vector<String> const& messages) override;
+    virtual void did_get_unstyled_js_console_messages(u64 page_id, i32 start_index, Vector<ConsoleOutput> const&) override;
     virtual void did_change_favicon(u64 page_id, Gfx::ShareableBitmap const&) override;
     virtual void did_request_alert(u64 page_id, String const&) override;
     virtual void did_request_confirm(u64 page_id, String const&) override;