From 2b0c903afeb7b175062306288cc15ba8947c5d04 Mon Sep 17 00:00:00 2001
From: Koichiro IWAO <meta@vmeta.jp>
Date: Sun, 13 Nov 2022 02:50:00 +0900
Subject: [PATCH] vnc: add mouse button 6, 7, 8 support

---
 vnc/vnc.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/vnc/vnc.c b/vnc/vnc.c
index ff008ca6..e6b84ace 100644
--- a/vnc/vnc.c
+++ b/vnc/vnc.c
@@ -547,7 +547,12 @@ lib_mod_event(struct vnc *v, int msg, long param1, long param2,
             }
         }
     }
-    else if (msg >= 100 && msg <= 110) /* mouse events */
+    /* mouse events
+     *
+     * VNC supports up to 8 mouse buttons because mouse buttons are
+     * represented by 7 bits bitmask
+     */
+    else if (msg >= WM_MOUSEMOVE && msg <= WM_BUTTON8DOWN) /* 100 to 116 */
     {
         switch (msg)
         {
@@ -583,6 +588,24 @@ lib_mod_event(struct vnc *v, int msg, long param1, long param2,
             case WM_BUTTON5DOWN:
                 v->mod_mouse_state |= 16;
                 break;
+            case WM_BUTTON6UP:
+                v->mod_mouse_state &= ~32;
+                break;
+            case WM_BUTTON6DOWN:
+                v->mod_mouse_state |= 32;
+                break;
+            case WM_BUTTON7UP:
+                v->mod_mouse_state &= ~64;
+                break;
+            case WM_BUTTON7DOWN:
+                v->mod_mouse_state |= 64;
+                break;
+            case WM_BUTTON8UP:
+                v->mod_mouse_state &= ~128;
+                break;
+            case WM_BUTTON8DOWN:
+                v->mod_mouse_state |= 128;
+                break;
         }
 
         init_stream(s, 8192);