Refactor: Move Win32-specific DPI logic to Win32DPIUtils

This commit introduces a dedicated Win32DPIUtils class to isolate
Win32-specific DPI logic, improving platform separation and
maintainability.

Author: ShahzaibIbrahim

bundles/org.eclipse.swt/Eclipse SWT AWT/win32/org/eclipse/swt/awt/SWT_AWT.java

@@ -250,7 +250,7 @@ public static Frame new_Frame (final Composite parent) {
 
 	parent.getDisplay().asyncExec(() -> {
 		if (parent.isDisposed()) return;
-		final Rectangle clientArea = DPIUtil.scaleUp(parent.getClientArea(), DPIUtil.getZoomForAutoscaleProperty(parent.nativeZoom)); // To Pixels
+		final Rectangle clientArea = Win32DPIUtils.scaleUp(parent.getClientArea(), DPIUtil.getZoomForAutoscaleProperty(parent.nativeZoom)); // To Pixels
 		EventQueue.invokeLater(() -> {
 			frame.setSize (clientArea.width, clientArea.height);
 			frame.validate ();
@@ -286,15 +286,14 @@ public static Shell new_Shell (final Display display, final Canvas parent) {
 		SWT.error (SWT.ERROR_NOT_IMPLEMENTED, e);
 	}
 	if (handle == 0) SWT.error (SWT.ERROR_INVALID_ARGUMENT, null, " [peer not created]");
-
 	final Shell shell = Shell.win32_new (display, handle);
 	final ComponentListener listener = new ComponentAdapter () {
 		@Override
 		public void componentResized (ComponentEvent e) {
 			display.syncExec (() -> {
 				if (shell.isDisposed()) return;
 				Dimension dim = parent.getSize ();
-				shell.setSize(DPIUtil.autoScaleDown(new Point(dim.width, dim.height))); // To Points
+				shell.setSize(Win32DPIUtils.scaleDown(new Point(dim.width, dim.height), DPIUtil.getDeviceZoom())); // To Points
 			});
 		}
 	};

bundles/org.eclipse.swt/Eclipse SWT Browser/win32/org/eclipse/swt/browser/Edge.java

@@ -1254,8 +1254,8 @@ int handleContextMenuRequested(long pView, long pArgs) {
 	//   to PIXEL coordinates with the real native zoom value
 	//   independent from the swt.autoScale property:
 	Point pt = new Point( //
-			DPIUtil.scaleUp(win32Point.x, DPIUtil.getNativeDeviceZoom()), //
-			DPIUtil.scaleUp(win32Point.y, DPIUtil.getNativeDeviceZoom()));
+			Win32DPIUtils.scaleUp(win32Point.x, DPIUtil.getNativeDeviceZoom()), //
+			Win32DPIUtils.scaleUp(win32Point.y, DPIUtil.getNativeDeviceZoom()));
 	// - then, scale back down from PIXEL to DISPLAY coordinates, taking
 	//   swt.autoScale property into account
 	//   which is also later considered in Menu#setLocation()

bundles/org.eclipse.swt/Eclipse SWT Browser/win32/org/eclipse/swt/browser/IE.java

@@ -1880,7 +1880,7 @@ void handleDOMEvent (OleEvent e) {
 	int screenY = pVarResult.getInt();
 	pVarResult.dispose();
 
-	Point position = DPIUtil.autoScaleDown(new Point(screenX, screenY)); // To Points
+	Point position = Win32DPIUtils.scaleDown(new Point(screenX, screenY), DPIUtil.getDeviceZoom()); // To Points
 	position = browser.getDisplay().map(null, browser, position);
 	newEvent.x = position.x; newEvent.y = position.y;
 

bundles/org.eclipse.swt/Eclipse SWT Browser/win32/org/eclipse/swt/browser/WebSite.java

@@ -320,8 +320,8 @@ int ShowContextMenu(int dwID, long ppt, long pcmdtReserved, long pdispReserved)
 	Event event = new Event();
 	POINT pt = new POINT();
 	OS.MoveMemory(pt, ppt, POINT.sizeof);
-	pt.x = DPIUtil.autoScaleDown(pt.x); // To Points
-	pt.y = DPIUtil.autoScaleDown(pt.y); // To Points
+	pt.x = DPIUtil.scaleDown(pt.x, DPIUtil.getDeviceZoom()); // To Points
+	pt.y = DPIUtil.scaleDown(pt.y, DPIUtil.getDeviceZoom()); // To Points
 	event.x = pt.x;
 	event.y = pt.y;
 	browser.notifyListeners(SWT.MenuDetect, event);

bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/DragSource.java

@@ -510,7 +510,7 @@ private void drag(Event dragEvent) {
 		int offsetX = event.offsetX;
 		hwndDrag = topControl.handle;
 		if ((topControl.getStyle() & SWT.RIGHT_TO_LEFT) != 0) {
-			offsetX = DPIUtil.scaleUp(image.getBounds(), zoom).width - offsetX;
+			offsetX = Win32DPIUtils.scaleUp(image.getBounds(), zoom).width - offsetX;
 			RECT rect = new RECT ();
 			OS.GetClientRect (topControl.handle, rect);
 			hwndDrag = OS.CreateWindowEx (
@@ -538,8 +538,8 @@ private void drag(Event dragEvent) {
 		int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN;
 		OS.RedrawWindow (topControl.handle, null, 0, flags);
 		POINT pt = new POINT ();
-		pt.x = DPIUtil.scaleUp(dragEvent.x, zoom);// To Pixels
-		pt.y = DPIUtil.scaleUp(dragEvent.y, zoom);// To Pixels
+		pt.x = Win32DPIUtils.scaleUp(dragEvent.x, zoom);// To Pixels
+		pt.y = Win32DPIUtils.scaleUp(dragEvent.y, zoom);// To Pixels
 		OS.MapWindowPoints (control.handle, 0, pt, 1);
 		RECT rect = new RECT ();
 		OS.GetWindowRect (hwndDrag, rect);

bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/DropTarget.java

@@ -410,7 +410,7 @@ private Point convertPixelToPoint(int xInPixels, int yInPixels) {
 	if (this.control == null) {
 		// If there is no control for context, the behavior remains as before
 		int zoom = DPIUtil.getZoomForAutoscaleProperty(this.nativeZoom);
-		return DPIUtil.scaleDown(new Point(xInPixels, yInPixels), zoom);
+		return Win32DPIUtils.scaleDown(new Point(xInPixels, yInPixels), zoom);
 	}
 	int zoom = DPIUtil.getZoomForAutoscaleProperty(this.control.nativeZoom);
 	// There is no API to convert absolute values in pixels to display relative
@@ -419,7 +419,7 @@ private Point convertPixelToPoint(int xInPixels, int yInPixels) {
 	POINT pt = new POINT ();
 	pt.x = xInPixels;  pt.y = yInPixels;
 	OS.ScreenToClient (this.control.handle, pt);
-	Point p = DPIUtil.scaleDown(new Point (pt.x, pt.y), zoom);
+	Point p = Win32DPIUtils.scaleDown(new Point (pt.x, pt.y), zoom);
 	return this.control.toDisplay(p);
 }
 

bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDragSourceEffect.java

@@ -16,7 +16,6 @@
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.internal.*;
-import org.eclipse.swt.internal.DPIUtil.*;
 import org.eclipse.swt.internal.win32.*;
 import org.eclipse.swt.widgets.*;
 
@@ -147,7 +146,7 @@ Image getDragSourceImage(DragSourceEvent event) {
 					data.transparentPixel = shdi.crColorKey << 8;
 				}
 				Display display = control.getDisplay();
-				dragSourceImage = new Image(display, new AutoScaleImageDataProvider(display, data, DPIUtil.getZoomForAutoscaleProperty(control.nativeZoom)));
+				dragSourceImage = new Image(display, new Win32DPIUtils.AutoScaleImageDataProvider(display, data, DPIUtil.getZoomForAutoscaleProperty(control.nativeZoom)));
 				OS.SelectObject (memHdc, oldMemBitmap);
 				OS.DeleteDC (memHdc);
 				OS.DeleteObject (memDib);

bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDropTargetEffect.java

@@ -151,7 +151,7 @@ public void dragOver(DropTargetEvent event) {
 		int effect = checkEffect(event.feedback);
 		long handle = table.handle;
 		Point coordinates = new Point(event.x, event.y);
-		coordinates = DPIUtil.scaleUp(table.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(table.nativeZoom)); // To Pixels
+		coordinates = Win32DPIUtils.scaleUp(table.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(table.nativeZoom)); // To Pixels
 		LVHITTESTINFO pinfo = new LVHITTESTINFO();
 		pinfo.x = coordinates.x;
 		pinfo.y = coordinates.y;

bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDragSourceEffect.java

@@ -16,7 +16,6 @@
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.internal.*;
-import org.eclipse.swt.internal.DPIUtil.*;
 import org.eclipse.swt.internal.win32.*;
 import org.eclipse.swt.widgets.*;
 
@@ -146,7 +145,7 @@ Image getDragSourceImage(DragSourceEvent event) {
 					data.transparentPixel = shdi.crColorKey << 8;
 				}
 				Display display = control.getDisplay ();
-				dragSourceImage = new Image (display, new AutoScaleImageDataProvider(display, data, DPIUtil.getZoomForAutoscaleProperty(control.nativeZoom)));
+				dragSourceImage = new Image (display, new Win32DPIUtils.AutoScaleImageDataProvider(display, data, DPIUtil.getZoomForAutoscaleProperty(control.nativeZoom)));
 				OS.SelectObject (memHdc, oldMemBitmap);
 				OS.DeleteDC (memHdc);
 				OS.DeleteObject (memDib);

bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java

@@ -165,7 +165,7 @@ public void dragOver(DropTargetEvent event) {
 		int effect = checkEffect(event.feedback);
 		long handle = tree.handle;
 		Point coordinates = new Point(event.x, event.y);
-		coordinates = DPIUtil.scaleUp(tree.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(tree.nativeZoom)); // To Pixels
+		coordinates = Win32DPIUtils.scaleUp(tree.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(tree.nativeZoom)); // To Pixels
 		TVHITTESTINFO lpht = new TVHITTESTINFO ();
 		lpht.x = coordinates.x;
 		lpht.y = coordinates.y;