input: minor constraint fixes

fixes the confined region, warping issues, etc. Closes #3158

1 files changed, 31 insertions, 0 deletions

diff --git a/src/helpers/Region.cpp b/src/helpers/Region.cpp
index 38a3760b..644bd5d4 100644
--- a/src/helpers/Region.cpp
+++ b/src/helpers/Region.cpp
@@ -104,3 +104,34 @@ bool CRegion::containsPoint(const Vector2D& vec) {
 bool CRegion::empty() {
     return !pixman_region32_not_empty(&m_rRegion);
 }
+
+Vector2D CRegion::closestPoint(const Vector2D& vec) {
+    double   bestDist = __FLT_MAX__;
+    Vector2D leader   = vec;
+
+    for (auto& box : getRects()) {
+        double x = 0, y = 0;
+
+        if (vec.x >= box.x2)
+            x = box.x2 - 1;
+        else if (vec.x < box.x1)
+            x = box.x1;
+        else
+            x = vec.x;
+
+        if (vec.y >= box.y2)
+            y = box.y2 - 1;
+        else if (vec.y < box.y1)
+            y = box.y1;
+        else
+            y = vec.y;
+
+        double distance = sqrt(pow(x, 2) + pow(y, 2));
+        if (distance < bestDist) {
+            bestDist = distance;
+            leader   = {x, y};
+        }
+    }
+
+    return leader;
+}
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