[client] input: gate motion on active capture

client/displayservers/Wayland/input.c

@@ -189,13 +189,25 @@ static const struct wl_pointer_listener pointerListener = {
 static void confinedHandler(void * data,
     struct zwp_confined_pointer_v1 * pointer)
 {
-  MTRACE("conf active=1 id=%u", proxyId(pointer));
+  bool valid;
+  LG_LOCK(wlWm.surfaceLock);
+  valid = pointer == wlWm.confinedPointer;
+  if (valid)
+    atomic_store_explicit(&wlWm.confActive, true, memory_order_release);
+  LG_UNLOCK(wlWm.surfaceLock);
+  MTRACE("conf active=1 id=%u valid=%d", proxyId(pointer), valid);
 }
 
 static void unconfinedHandler(void * data,
     struct zwp_confined_pointer_v1 * pointer)
 {
-  MTRACE("conf active=0 id=%u", proxyId(pointer));
+  bool valid;
+  LG_LOCK(wlWm.surfaceLock);
+  valid = pointer == wlWm.confinedPointer;
+  if (valid)
+    atomic_store_explicit(&wlWm.confActive, false, memory_order_release);
+  LG_UNLOCK(wlWm.surfaceLock);
+  MTRACE("conf active=0 id=%u valid=%d", proxyId(pointer), valid);
 }
 
 static const struct zwp_confined_pointer_v1_listener confinedListener = {
@@ -206,13 +218,25 @@ static const struct zwp_confined_pointer_v1_listener confinedListener = {
 static void lockedHandler(void * data,
     struct zwp_locked_pointer_v1 * pointer)
 {
-  MTRACE("lock active=1 id=%u", proxyId(pointer));
+  bool valid;
+  LG_LOCK(wlWm.surfaceLock);
+  valid = pointer == wlWm.lockedPointer;
+  if (valid)
+    atomic_store_explicit(&wlWm.lockActive, true, memory_order_release);
+  LG_UNLOCK(wlWm.surfaceLock);
+  MTRACE("lock active=1 id=%u valid=%d", proxyId(pointer), valid);
 }
 
 static void unlockedHandler(void * data,
     struct zwp_locked_pointer_v1 * pointer)
 {
-  MTRACE("lock active=0 id=%u", proxyId(pointer));
+  bool valid;
+  LG_LOCK(wlWm.surfaceLock);
+  valid = pointer == wlWm.lockedPointer;
+  if (valid)
+    atomic_store_explicit(&wlWm.lockActive, false, memory_order_release);
+  LG_UNLOCK(wlWm.surfaceLock);
+  MTRACE("lock active=0 id=%u valid=%d", proxyId(pointer), valid);
 }
 
 static const struct zwp_locked_pointer_v1_listener lockedListener = {
@@ -421,6 +445,9 @@ static void waylandCleanUpPointer(void)
   uint64_t confSeq = 0;
   INTERLOCKED_SECTION(wlWm.surfaceLock,
   {
+    atomic_store_explicit(&wlWm.lockActive, false, memory_order_release);
+    atomic_store_explicit(&wlWm.confActive, false, memory_order_release);
+
     if (wlWm.lockedPointer)
     {
       lockId = proxyId(wlWm.lockedPointer);
@@ -472,6 +499,9 @@ static void handlePointerCapability(uint32_t capabilities)
       zwp_relative_pointer_v1_add_listener(wlWm.relativePointer,
         &relativePointerListener, NULL);
     }
+
+    if (app_isCaptureMode())
+      waylandCapturePointer();
   }
 }
 
@@ -616,6 +646,8 @@ void waylandGrabPointer(void)
   {
     if (!wlWm.confinedPointer && !wlWm.lockedPointer)
     {
+      atomic_store_explicit(&wlWm.confActive, false,
+          memory_order_release);
       wlWm.confinedPointer = createConfine(NULL);
       confId = proxyId(wlWm.confinedPointer);
       confSeq = app_mouseSeq();
@@ -645,6 +677,7 @@ inline static uint32_t internalUngrabPointer(bool lock, uint64_t * traceSeq)
     confId = proxyId(wlWm.confinedPointer);
     zwp_confined_pointer_v1_destroy(wlWm.confinedPointer);
     wlWm.confinedPointer = NULL;
+    atomic_store_explicit(&wlWm.confActive, false, memory_order_release);
     *traceSeq = app_mouseSeq();
   }
 
@@ -696,9 +729,12 @@ void waylandCapturePointer(void)
       confId = proxyId(wlWm.confinedPointer);
       zwp_confined_pointer_v1_destroy(wlWm.confinedPointer);
       wlWm.confinedPointer = NULL;
+      atomic_store_explicit(&wlWm.confActive, false,
+          memory_order_release);
       confSeq = app_mouseSeq();
     }
 
+    atomic_store_explicit(&wlWm.lockActive, false, memory_order_release);
     wlWm.lockedPointer = createLock();
     lockId = proxyId(wlWm.lockedPointer);
     lockSeq = app_mouseSeq();
@@ -723,6 +759,8 @@ void waylandUncapturePointer(void)
       lockId = proxyId(wlWm.lockedPointer);
       zwp_locked_pointer_v1_destroy(wlWm.lockedPointer);
       wlWm.lockedPointer = NULL;
+      atomic_store_explicit(&wlWm.lockActive, false,
+          memory_order_release);
       lockSeq = app_mouseSeq();
     }
 
@@ -737,6 +775,8 @@ void waylandUncapturePointer(void)
       confDropId = internalUngrabPointer(false, &confDropSeq);
     else if (wlWm.pointer)
     {
+      atomic_store_explicit(&wlWm.confActive, false,
+          memory_order_release);
       wlWm.confinedPointer = createConfine(NULL);
       confReqId = proxyId(wlWm.confinedPointer);
       confReqSeq = app_mouseSeq();
@@ -748,6 +788,13 @@ void waylandUncapturePointer(void)
   MLOG(confReqSeq, "conf req id=%u why=uncapture", confReqId);
 }
 
+bool waylandIsPointerCaptured(void)
+{
+  const atomic_bool * active = wlWm.warpSupport ?
+    &wlWm.lockActive : &wlWm.confActive;
+  return atomic_load_explicit(active, memory_order_acquire);
+}
+
 void waylandGrabKeyboard(void)
 {
   if (wlWm.seat &&

client/displayservers/Wayland/wayland.c

@@ -112,6 +112,8 @@ static bool waylandInit(const LG_DSInitParams params)
   LG_LOCK_INIT(wlWm.pendingHDRLock);
   LG_LOCK_INIT(wlWm.hdrLock);
   wlWm.desktop        = WL_Desktops[0];
+  atomic_init(&wlWm.confActive, false);
+  atomic_init(&wlWm.lockActive, false);
   atomic_init(&wlWm.cmFeaturesDone, false);
   atomic_init(&wlWm.cmCanDoHDR, false);
   atomic_init(&wlWm.hdrPQWhiteLevel, 203);
@@ -321,6 +323,7 @@ struct LG_DisplayServerOps LGDS_Wayland =
   .ungrabPointer       = waylandUngrabPointer,
   .capturePointer      = waylandCapturePointer,
   .uncapturePointer    = waylandUncapturePointer,
+  .isPointerCaptured   = waylandIsPointerCaptured,
   .grabKeyboard        = waylandGrabKeyboard,
   .ungrabKeyboard      = waylandUngrabKeyboard,
   .getKeyLabel         = waylandGetKeyLabel,

client/displayservers/Wayland/wayland.h

@@ -123,7 +123,8 @@ struct WaylandHDRParameters
 
 struct WaylandDSState
 {
-  bool pointerGrabbed;
+  _Atomic(bool) confActive;
+  _Atomic(bool) lockActive;
   bool          keyboardGrabbed;
   bool          pointerInSurface;
   bool          focusedOnSurface;
@@ -378,6 +379,7 @@ void waylandUngrabKeyboard(void);
 void waylandUngrabPointer(void);
 void waylandCapturePointer(void);
 void waylandUncapturePointer(void);
+bool waylandIsPointerCaptured(void);
 void waylandRealignPointer(void);
 void waylandWarpPointer(int x, int y, bool exiting);
 void waylandGuestPointerUpdated(double x, double y, double localX, double localY);

client/displayservers/X11/x11.c

@@ -1940,6 +1940,8 @@ static void x11GrabPointer(void)
 
 static void x11UngrabPointer(void)
 {
+  atomic_store_explicit(&x11.captureActive, false, memory_order_release);
+
   if (!x11.pointerGrabbed)
     return;
 
@@ -1952,10 +1954,14 @@ static void x11UngrabPointer(void)
 static void x11CapturePointer(void)
 {
   x11GrabPointer();
+  atomic_store_explicit(&x11.captureActive, x11.pointerGrabbed,
+      memory_order_release);
 }
 
 static void x11UncapturePointer(void)
 {
+  atomic_store_explicit(&x11.captureActive, false, memory_order_release);
+
   /* we need to ungrab the pointer on the following conditions when exiting capture mode:
    *   - if the format is invalid as we do not know where the guest cursor is,
    *     which breaks edge detection as the cursor can not be warped out of the
@@ -1966,6 +1972,11 @@ static void x11UncapturePointer(void)
     x11UngrabPointer();
 }
 
+static bool x11IsPointerCaptured(void)
+{
+  return atomic_load_explicit(&x11.captureActive, memory_order_acquire);
+}
+
 static void x11GrabKeyboard(void)
 {
   if (x11.keyboardGrabbed)
@@ -2143,6 +2154,7 @@ struct LG_DisplayServerOps LGDS_X11 =
   .ungrabPointer       = x11UngrabPointer,
   .capturePointer      = x11CapturePointer,
   .uncapturePointer    = x11UncapturePointer,
+  .isPointerCaptured   = x11IsPointerCaptured,
   .getKeyLabel         = x11GetKeyLabel,
   .grabKeyboard        = x11GrabKeyboard,
   .ungrabKeyboard      = x11UngrabKeyboard,

client/displayservers/X11/x11.h

@@ -93,6 +93,7 @@ struct X11DSState
   int xValuator;
   int yValuator;
 
+  _Atomic(bool) captureActive;
   bool          pointerGrabbed;
   bool          keyboardGrabbed;
   bool entered;

client/include/interface/displayserver.h

@@ -210,6 +210,7 @@ struct LG_DisplayServerOps
   /* (un)capturePointer is used do toggle special cursor tracking in capture mode */
   void (*capturePointer)(void);
   void (*uncapturePointer)(void);
+  bool (*isPointerCaptured)(void);
 
   /* get the active keymap's display label for the provided Linux keycode */
   bool (*getKeyLabel)(int sc, char * label, size_t size);
@@ -291,6 +292,7 @@ struct LG_DisplayServerOps
   DEBUG_ASSERT((x)->ungrabPointer      ); \
   DEBUG_ASSERT((x)->capturePointer     ); \
   DEBUG_ASSERT((x)->uncapturePointer   ); \
+  DEBUG_ASSERT((x)->isPointerCaptured ); \
   DEBUG_ASSERT((x)->getKeyLabel        ); \
   DEBUG_ASSERT((x)->warpPointer        ); \
   DEBUG_ASSERT((x)->realignPointer     ); \

client/src/core.c

@@ -530,9 +530,10 @@ void core_handleGuestMouseUpdate(void)
 
 void core_handleMouseGrabbed(double ex, double ey)
 {
-  const bool enabled = core_inputEnabled();
-  MTRACE("captured delta=%.3f,%.3f enabled=%d", ex, ey,
-      enabled);
+  const bool active  = g_cursor.grab && g_state.ds->isPointerCaptured();
+  const bool enabled = active && core_inputEnabled();
+  MTRACE("captured delta=%.3f,%.3f active=%d enabled=%d", ex, ey,
+      active, enabled);
 
   if (!enabled)
     return;

client/tests/CMakeLists.txt

@@ -73,6 +73,7 @@ set(MOUSE_CASES
   capture-pending
   capture-revoked
   capture-release
+  capture-fallback
   rotate-scale
   geometry
   edges

client/tests/mouse_test.c

@@ -135,6 +135,12 @@ static void ungrab(void)
 
 static void capture(void)
 {
+  if (m.support == LG_DS_WARP_NONE)
+  {
+    grab();
+    return;
+  }
+
   m.conf.req = false;
   if (!m.conf.hold)
     m.conf.on = false;
@@ -144,12 +150,23 @@ static void capture(void)
 
 static void uncapture(void)
 {
+  if (m.support == LG_DS_WARP_NONE)
+  {
+    ungrab();
+    return;
+  }
+
   push(EV_UNCAPTURE, 0, 0, false);
   m.lock.req = false;
   if (!m.lock.hold)
     m.lock.on = false;
 }
 
+static bool captured(void)
+{
+  return m.support == LG_DS_WARP_NONE ? m.conf.on : m.lock.on;
+}
+
 static void warp(int x, int y, bool exiting)
 {
   push(EV_WARP, x, y, exiting);
@@ -171,6 +188,7 @@ static struct LG_DisplayServerOps ds = {
   .ungrabPointer       = ungrab,
   .capturePointer      = capture,
   .uncapturePointer    = uncapture,
+  .isPointerCaptured   = captured,
   .warpPointer         = warp,
   .isValidPointerPos   = valid,
 };
@@ -407,6 +425,23 @@ static void testCapRelease(void)
   CHECK(count(EV_MOTION) == 1);
 }
 
+static void testCapFallback(void)
+{
+  reset();
+  setLocal(50, 50);
+  m.support = LG_DS_WARP_NONE;
+  g_params.captureInputOnly = true;
+  core_setGrabQuiet(true);
+
+  m.conf.on = true;
+  core_handleMouseGrabbed(1, 0);
+  CHECK(count(EV_MOTION) == 1);
+
+  m.conf.on = false;
+  core_handleMouseGrabbed(1, 0);
+  CHECK(count(EV_MOTION) == 1);
+}
+
 static void testRotateScale(void)
 {
   reset();
@@ -642,6 +677,7 @@ static const struct Test tests[] = {
   { "capture-pending" , testCapWait      },
   { "capture-revoked" , testCapRevoke    },
   { "capture-release" , testCapRelease   },
+  { "capture-fallback", testCapFallback  },
   { "rotate-scale"    , testRotateScale  },
   { "geometry"        , testGeometry     },
   { "edges"           , testEdges        },