Log console messages explicitilly.

Log js dialog execution. JS dialogs don't work due to upstream CEF bug:
chromiumembedded/cef#3818
https://magpcss.org/ceforum/viewtopic.php?f=6&t=20041

Author: cztomczak

cef/browser_window.cpp

@@ -303,6 +303,7 @@ void BrowserWindow::SetIconFromSettings() {
 bool BrowserWindow::SetFocus() {
     // Calling SetFocus() on shellBrowser handle does not work.
     if (cefBrowser_) {
+        LOGGER_INFO << "Focus browser, id=" << cefBrowser_->GetIdentifier();
         cefBrowser_->GetHost()->SetFocus(true);
     }
     return true;

cef/client_handler.cpp

@@ -117,6 +117,34 @@ void ClientHandler::OnTitleChange(CefRefPtr<CefBrowser> cefBrowser,
     }
 }
 
+bool ClientHandler::OnConsoleMessage(CefRefPtr<CefBrowser> browser,
+                                    cef_log_severity_t level,
+                                    const CefString& message,
+                                    const CefString& source,
+                                    int line)
+{
+    std::string level_string = "UNKNOWN";
+    switch (level) {
+        case LOGSEVERITY_DEBUG:
+            level_string = "Debug";
+            break;
+        case LOGSEVERITY_INFO:
+            level_string = "Info";
+            break;
+        case LOGSEVERITY_WARNING:
+            level_string = "Warning";
+            break;
+        case LOGSEVERITY_ERROR:
+            level_string = "Error";
+            break;
+        case LOGSEVERITY_FATAL:
+            level_string = "Fatal";
+            break;
+    }
+    LOGGER_INFO << "JS Console: [" << level_string << "] " << message << "(" << source << ":" << line << ")";
+    return true;
+}
+
 // ----------------------------------------------------------------------------
 // CefLifeSpanHandler methods
 // ----------------------------------------------------------------------------
@@ -670,3 +698,21 @@ void ClientHandler::OnDownloadUpdated(
         LOGGER_INFO << "Download was cancelled";
     }
 }
+
+// ----------------------------------------------------------------------------
+// CefDownloadHandler methods
+// ----------------------------------------------------------------------------
+
+bool ClientHandler::OnJSDialog(CefRefPtr<CefBrowser> browser,
+                              const CefString& origin_url,
+                              JSDialogType dialog_type,
+                              const CefString& message_text,
+                              const CefString& default_prompt_text,
+                              CefRefPtr<CefJSDialogCallback> callback,
+                              bool& suppress_message)
+{
+    // Use default implementation.
+    LOGGER_DEBUG << "JS dialog: " << message_text;
+    suppress_message = false;
+    return false;
+}

cef/client_handler.h

@@ -16,7 +16,8 @@ class ClientHandler : public CefClient,
                       public CefDragHandler,
                       public CefRequestHandler,
                       public CefKeyboardHandler,
-                      public CefDownloadHandler {
+                      public CefDownloadHandler,
+                      public CefJSDialogHandler {
  public:
   ClientHandler();
   ~ClientHandler();
@@ -49,6 +50,9 @@ class ClientHandler : public CefClient,
   virtual CefRefPtr<CefDownloadHandler> GetDownloadHandler() {
     return this;
   }
+  virtual CefRefPtr<CefJSDialogHandler> GetJSDialogHandler() {
+    return this;
+  }
   virtual bool OnProcessMessageReceived(CefRefPtr<CefBrowser> browser,
                                         CefRefPtr<CefFrame> frame,
                                         CefProcessId source_process,
@@ -58,6 +62,11 @@ class ClientHandler : public CefClient,
   // CefDisplayHandler methods:
   virtual void OnTitleChange(CefRefPtr<CefBrowser> browser,
                              const CefString& title) override;
+  virtual bool OnConsoleMessage(CefRefPtr<CefBrowser> browser,
+                                cef_log_severity_t level,
+                                const CefString& message,
+                                const CefString& source,
+                                int line) override;
 
   // CefLifeSpanHandler methods:
   virtual void OnAfterCreated(CefRefPtr<CefBrowser> browser) override;
@@ -126,6 +135,15 @@ class ClientHandler : public CefClient,
       CefRefPtr<CefBrowser> browser,
       CefRefPtr<CefDownloadItem> download_item,
       CefRefPtr<CefDownloadItemCallback> callback) override;
+  
+  // CefJSDialogHandler methods:
+  virtual bool OnJSDialog(CefRefPtr<CefBrowser> browser,
+                          const CefString& origin_url,
+                          JSDialogType dialog_type,
+                          const CefString& message_text,
+                          const CefString& default_prompt_text,
+                          CefRefPtr<CefJSDialogCallback> callback,
+                          bool& suppress_message) override;
 
  private:
   // Include the default reference counting implementation.