Support JBR-1650 propagate custom decoration title bar height to native

GitOrigin-RevId: 13ca881ea2023fdc5871c382bb23f4a5a3855348

platform/platform-impl/src/com/intellij/jdkEx/JdkEx.java

@@ -71,4 +71,18 @@ public class JdkEx {
       }
     }
   }
+
+  public static void setCustomDecorationTitleBarHeight(@NotNull Window window, int height) {
+    if (SystemInfo.isJetBrainsJvm && SystemInfo.isWindows) {
+      try {
+        MethodInvocator invocator =
+          new MethodInvocator(false, Class.forName("sun.awt.windows.WWindowPeer"), "setCustomDecorationTitleBarHeight", int.class);
+        if (invocator.isAvailable()) {
+          invocator.invoke(AWTAccessor.getComponentAccessor().getPeer(window), height);
+        }
+      }
+      catch (ClassNotFoundException ignore) {
+      }
+    }
+  }
 }

platform/platform-impl/src/com/intellij/openapi/wm/impl/customFrameDecorations/header/CustomHeader.kt

@@ -159,6 +159,7 @@ abstract class CustomHeader(private val window: Window) : JPanel(), Disposable {
     protected fun updateCustomDecorationHitTestSpots() {
         val toList = getHitTestSpots().map {it.getRectangleOn(window)}.toList()
         JdkEx.setCustomDecorationHitTestSpots(window, toList)
+        JdkEx.setCustomDecorationTitleBarHeight(window, height)
     }
 
     abstract fun getHitTestSpots(): List<RelativeRectangle>