diff --git a/interfaces/innerkits/wm/wm_common.h b/interfaces/innerkits/wm/wm_common.h
index c685e0029e2471456eb348694de3ccb2117a72e2..c3549d1fc1295adbdf75eb3431e3555115d49f63 100644
--- a/interfaces/innerkits/wm/wm_common.h
+++ b/interfaces/innerkits/wm/wm_common.h
@@ -27,6 +27,7 @@
 
 #include "../dm/dm_common.h"
 #include "securec.h"
+#include "wm_math.h"
 
 namespace OHOS {
 namespace Rosen {
@@ -699,6 +700,43 @@ private:
     }
 };
 
+/**
+ * @struct SingleHandTransform
+ *
+ * @brief parameter of transform in single hand mode.
+ */
+struct SingleHandTransform {
+    int32_t posX = 0;
+    int32_t posY = 0;
+    float scaleX = 0;
+    float scaleY = 0;
+
+    bool operator==(const SingleHandTransform& right) const
+    {
+        return posX == right.posX && MathHelper::NearEqual(scaleX, right.scaleX) &&
+               posY == right.posY && MathHelper::NearEqual(scaleY, right.scaleY);
+    }
+
+    bool operator!=(const SingleHandTransform& right) const
+    {
+        return !(*this == right);
+    }
+
+    bool Marshalling(Parcel& parcel) const
+    {
+        return parcel.WriteInt32(posX) && parcel.WriteInt32(posY) &&
+               parcel.WriteFloat(scaleX) && parcel.WriteFloat(scaleY);
+    }
+
+    void Unmarshalling(Parcel& parcel)
+    {
+        posX = parcel.ReadInt32();
+        posY = parcel.ReadInt32();
+        scaleX = parcel.ReadFloat();
+        scaleY = parcel.ReadFloat();
+    }
+};
+
 /**
  * @struct SystemBarProperty
  *
diff --git a/utils/include/wm_math.h b/utils/include/wm_math.h
index 0fbe679872b303e9fa2bcf30f0084b13b79c507d..3226aac208ffe69d83f395e7870574e0c7185a41 100644
--- a/utils/include/wm_math.h
+++ b/utils/include/wm_math.h
@@ -32,6 +32,8 @@ inline bool NearZero(float val)
     return val < POS_ZERO && val > NAG_ZERO;
 }
 
+inline bool NearEqual(float left, float right) { return std::abs(left - right) < POS_ZERO; }
+
 inline float ToRadians(float degrees)
 {
     return degrees * PI / 180.0f;