constraints: Lock surface region when region is empty (#6627)

* Pointer constraints: Lock surface region when region is empty

* Format code

1 files changed, 9 insertions, 2 deletions

diff --git a/src/protocols/PointerConstraints.cpp b/src/protocols/PointerConstraints.cpp
index c7b78a5b..a17fa6cd 100644
--- a/src/protocols/PointerConstraints.cpp
+++ b/src/protocols/PointerConstraints.cpp
@@ -165,8 +165,15 @@ SP<CWLSurface> CPointerConstraint::owner() {
 }
 
 CRegion CPointerConstraint::logicConstraintRegion() {
-    CRegion    rg            = region;
-    const auto SURFBOX       = pHLSurface->getSurfaceBoxGlobal();
+    CRegion    rg      = region;
+    const auto SURFBOX = pHLSurface->getSurfaceBoxGlobal();
+
+    // if region wasn't set in pointer-constraints request take surface region
+    if (rg.empty() && SURFBOX.has_value()) {
+        rg.set(SURFBOX.value());
+        return rg;
+    }
+
     const auto CONSTRAINTPOS = SURFBOX.has_value() ? SURFBOX->pos() : Vector2D{};
     rg.translate(CONSTRAINTPOS);
     return rg;