[win32] Dynamic handle creation for region

This commit refactors Region in the win32 implementation to better
support multiple handles for different zoom settings by creating all
handles only on demand.

Author: akoch-yatta

binaries/org.eclipse.swt.win32.win32.x86_64/.settings/.api_filters

@@ -592,6 +592,18 @@
             </message_arguments>
         </filter>
     </resource>
+    <resource path="Eclipse SWT/win32/org/eclipse/swt/graphics/Region.java" type="org.eclipse.swt.graphics.Region">
+        <filter id="1143996420">
+            <message_arguments>
+                <message_argument value="equals(Object)"/>
+            </message_arguments>
+        </filter>
+        <filter id="1143996420">
+            <message_arguments>
+                <message_argument value="hashCode()"/>
+            </message_arguments>
+        </filter>
+    </resource>
     <resource path="Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java" type="org.eclipse.swt.widgets.Composite">
         <filter id="576778288">
             <message_arguments>

bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/graphics/Region.java

@@ -424,23 +424,6 @@ void destroy() {
 	handle = 0;
 }
 
-/**
- * Compares the argument to the receiver, and returns true
- * if they represent the <em>same</em> object using a class
- * specific comparison.
- *
- * @param object the object to compare with this object
- * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
- *
- * @see #hashCode
- */
-@Override
-public boolean equals(Object object) {
-	if (this == object) return true;
-	if (!(object instanceof Region region)) return false;
-	return handle == region.handle;
-}
-
 /**
  * Returns a rectangle which represents the rectangular
  * union of the collection of polygons the receiver
@@ -499,21 +482,6 @@ long regionToRects(long message, long rgn, long r, long path) {
 	return 0;
 }
 
-/**
- * Returns an integer hash code for the receiver. Any two
- * objects that return <code>true</code> when passed to
- * <code>equals</code> must return the same value for this
- * method.
- *
- * @return the receiver's hash
- *
- * @see #equals
- */
-@Override
-public int hashCode() {
-	return (int)handle;
-}
-
 /**
  * Intersects the given rectangle to the collection of polygons
  * the receiver maintains to describe its area.

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Region.java

@@ -298,24 +298,6 @@ void destroy() {
 	handle = 0;
 }
 
-/**
- * Compares the argument to the receiver, and returns true
- * if they represent the <em>same</em> object using a class
- * specific comparison.
- *
- * @param object the object to compare with this object
- * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
- *
- * @see #hashCode
- */
-@Override
-public boolean equals(Object object) {
-	if (this == object) return true;
-	if (!(object instanceof Region)) return false;
-	Region region = (Region)object;
-	return handle == region.handle;
-}
-
 /**
  * Returns a rectangle which represents the rectangular
  * union of the collection of polygons the receiver
@@ -359,21 +341,6 @@ public static Region gtk_new(Device device, long handle) {
 	return new Region(device, handle);
 }
 
-/**
- * Returns an integer hash code for the receiver. Any two
- * objects that return <code>true</code> when passed to
- * <code>equals</code> must return the same value for this
- * method.
- *
- * @return the receiver's hash
- *
- * @see #equals
- */
-@Override
-public int hashCode() {
-	return (int)handle;
-}
-
 /**
  * Intersects the given rectangle to the collection of polygons
  * the receiver maintains to describe its area.