UWP: clear console when navigating pages.

4 files changed, 10 insertions, 1 deletions

diff --git a/support/hololens/ServoApp/BrowserPage.cpp b/support/hololens/ServoApp/BrowserPage.cpp
index 85b1c0c5885..29b18a3e439 100644
--- a/support/hololens/ServoApp/BrowserPage.cpp
+++ b/support/hololens/ServoApp/BrowserPage.cpp
@@ -273,6 +273,11 @@ void BrowserPage::OnPrefererenceSearchboxEdited(
   }
 }
 
+void BrowserPage::ClearConsole() {
+  Dispatcher().RunAsync(CoreDispatcherPriority::Low,
+                        [=] { DevtoolsConsoleOutput().Blocks().Clear(); });
+}
+
 void BrowserPage::OnDevtoolsMessage(DevtoolsMessageLevel level, hstring source,
                                     hstring body) {
   Dispatcher().RunAsync(CoreDispatcherPriority::Low, [=] {
diff --git a/support/hololens/ServoApp/BrowserPage.h b/support/hololens/ServoApp/BrowserPage.h
index 1b4a53bc636..db127cdf569 100644
--- a/support/hololens/ServoApp/BrowserPage.h
+++ b/support/hololens/ServoApp/BrowserPage.h
@@ -44,6 +44,7 @@ public:
   void OnPrefererenceSearchboxEdited(IInspectable const &,
                                      Input::KeyRoutedEventArgs const &);
   void OnDevtoolsMessage(servo::DevtoolsMessageLevel, hstring, hstring);
+  void ClearConsole();
   void OnDevtoolsDetached();
 
 private:
diff --git a/support/hololens/ServoApp/Devtools/Client.cpp b/support/hololens/ServoApp/Devtools/Client.cpp
index 8a10ce65cdc..c7d1b7cfc89 100644
--- a/support/hololens/ServoApp/Devtools/Client.cpp
+++ b/support/hololens/ServoApp/Devtools/Client.cpp
@@ -133,7 +133,9 @@ void DevtoolsClient::HandleMessage(JsonObject obj) {
       // Ignore
       return;
     } else if (obj.GetNamedString(L"type") == L"tabNavigated") {
-      // Ignore
+      if (obj.HasKey(L"state") && obj.GetNamedString(L"state") == L"stop") {
+        mDelegate.ClearConsole();
+      }
       return;
     } else if (obj.GetNamedString(L"type") == L"networkEventUpdate") {
       // FIXME: log if there is a non-200 HTTP response
diff --git a/support/hololens/ServoApp/Devtools/Client.h b/support/hololens/ServoApp/Devtools/Client.h
index 162d2e33e07..3764c201d46 100644
--- a/support/hololens/ServoApp/Devtools/Client.h
+++ b/support/hololens/ServoApp/Devtools/Client.h
@@ -51,6 +51,7 @@ private:
 class DevtoolsDelegate {
 public:
   virtual void OnDevtoolsMessage(DevtoolsMessageLevel, hstring, hstring) = 0;
+  virtual void ClearConsole() = 0;
   virtual void OnDevtoolsDetached() = 0;
 };