keybinds: fix multikey binds breaking after scroll wheel events (#12638)

hyprtester/src/tests/main/keybinds.cpp

@@ -456,6 +456,35 @@ static void testSubmap() {
     Tests::killAllWindows();
 }
 
+static void testBindsAfterScroll() {
+    NLog::log("{}Testing binds after scroll", Colors::GREEN);
+
+    clearFlag();
+    OK(getFromSocket("/keyword binds Alt_R,w,exec,touch " + flagFile));
+
+    // press keybind before scroll
+    OK(getFromSocket("/dispatch plugin:test:keybind 1,0,108")); // Alt_R press
+    OK(getFromSocket("/dispatch plugin:test:keybind 1,4,25"));  // w press
+    EXPECT(attemptCheckFlag(20, 50), true);
+    OK(getFromSocket("/dispatch plugin:test:keybind 0,4,25"));  // w release
+    OK(getFromSocket("/dispatch plugin:test:keybind 0,0,108")); // Alt_R release
+
+    // scroll
+    OK(getFromSocket("/dispatch plugin:test:scroll 120"));
+    OK(getFromSocket("/dispatch plugin:test:scroll -120"));
+    OK(getFromSocket("/dispatch plugin:test:scroll 120"));
+
+    // press keybind after scroll
+    OK(getFromSocket("/dispatch plugin:test:keybind 1,0,108")); // Alt_R press
+    OK(getFromSocket("/dispatch plugin:test:keybind 1,4,25"));  // w press
+    EXPECT(attemptCheckFlag(20, 50), true);
+    OK(getFromSocket("/dispatch plugin:test:keybind 0,4,25"));  // w release
+    OK(getFromSocket("/dispatch plugin:test:keybind 0,0,108")); // Alt_R release
+
+    clearFlag();
+    OK(getFromSocket("/keyword unbind Alt_R,w"));
+}
+
 static void testSubmapUniversal() {
     NLog::log("{}Testing submap universal", Colors::GREEN);
 
@@ -507,6 +536,7 @@ static bool test() {
     testShortcutRepeatKeyRelease();
     testSubmap();
     testSubmapUniversal();
+    testBindsAfterScroll();
 
     clearFlag();
     return !ret;

src/managers/KeybindManager.cpp

@@ -647,16 +647,22 @@ SDispatchResult CKeybindManager::handleKeybinds(const uint32_t modmask, const SP
     bool            found = false;
     SDispatchResult res;
 
-    if (pressed) {
+    // Skip keysym tracking for events with no keysym (e.g., scroll wheel events).
-        if (keycodeToModifier(key.keycode))
+    // Scroll events have keysym=0 and are always "pressed" (never released),
-            m_mkMods.insert(key.keysym);
+    // so without this check, 0 gets inserted into m_mkKeys and never removed,
-        else
+    // breaking multi-key binds (binds flag 's'). See issue #8699.
-            m_mkKeys.insert(key.keysym);
+    if (key.keysym != 0) {
-    } else {
+        if (pressed) {
-        if (keycodeToModifier(key.keycode))
+            if (keycodeToModifier(key.keycode))
-            m_mkMods.erase(key.keysym);
+                m_mkMods.insert(key.keysym);
-        else
+            else
-            m_mkKeys.erase(key.keysym);
+                m_mkKeys.insert(key.keysym);
+        } else {
+            if (keycodeToModifier(key.keycode))
+                m_mkMods.erase(key.keysym);
+            else
+                m_mkKeys.erase(key.keysym);
+        }
     }
 
     for (auto& k : m_keybinds) {