WindowServer+LibGUI: Support the 4th and 5th mouse buttons

We'll call the "Back" and "Forward" since that's what they are normally
mapped to in some other systems.

2 files changed, 6 insertions, 0 deletions

diff --git a/Libraries/LibGUI/Event.h b/Libraries/LibGUI/Event.h
index 6c2374ccfb..2b2adf7bac 100644
--- a/Libraries/LibGUI/Event.h
+++ b/Libraries/LibGUI/Event.h
@@ -257,6 +257,8 @@ enum MouseButton : u8 {
     Left = 1,
     Right = 2,
     Middle = 4,
+    Back = 8,
+    Forward = 16,
 };
 
 class KeyEvent final : public Event {
diff --git a/Libraries/LibGUI/WindowServerConnection.cpp b/Libraries/LibGUI/WindowServerConnection.cpp
index 036cf64869..441294598d 100644
--- a/Libraries/LibGUI/WindowServerConnection.cpp
+++ b/Libraries/LibGUI/WindowServerConnection.cpp
@@ -178,6 +178,10 @@ MouseButton to_gmousebutton(u32 button)
         return MouseButton::Right;
     case 4:
         return MouseButton::Middle;
+    case 8:
+        return MouseButton::Back;
+    case 16:
+        return MouseButton::Forward;
     default:
         ASSERT_NOT_REACHED();
         break;