Translate points in display coordinate space gap

This contribution fixes the current behaviour of the display coordinate
system of eclipse where a point can be manually set to somewhere in the
gap between the 2 monitor in the coordinate space (in the points
system). This fix translates those points to inside the scaled down
space of a monitor providing it the right coordinates in the display
coordinate space.

contributes to #62 and #127

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Display.java

@@ -5375,14 +5375,25 @@ private boolean setDPIAwareness(int desiredDpiAwareness) {
 }
 
 private Monitor getContainingMonitor(int x, int y) {
+	return getContainingMonitorOptional(x, y).orElse(getPrimaryMonitor());
+}
+
+private Optional<Monitor> getContainingMonitorOptional(int x, int y) {
 	Monitor[] monitors = getMonitors();
 	for (Monitor currentMonitor : monitors) {
 		Rectangle clientArea = currentMonitor.getClientArea();
 		if (clientArea.contains(x, y)) {
-			return currentMonitor;
+			return Optional.of(currentMonitor);
 		}
 	}
-	return getPrimaryMonitor();
+	return Optional.empty();
+}
+
+Point translatePointIfInDisplayCoordinateGap(int x, int y) {
+	if(getContainingMonitorOptional(x, y).isEmpty() && getContainingMonitorInPixelsCoordinateOptional(x, y).isPresent()) {
+		return translateLocationInPointInDisplayCoordinateSystem(x, y);
+	}
+	return new Point(x, y);
 }
 
 private Monitor getContainingMonitor(int x, int y, int width, int height) {
@@ -5403,14 +5414,18 @@ private Monitor getContainingMonitor(int x, int y, int width, int height) {
 }
 
 private Monitor getContainingMonitorInPixelsCoordinate(int xInPixels, int yInPixels) {
+	return getContainingMonitorInPixelsCoordinateOptional(xInPixels, yInPixels).orElse(getPrimaryMonitor());
+}
+
+private Optional<Monitor> getContainingMonitorInPixelsCoordinateOptional(int xInPixels, int yInPixels) {
 	Monitor[] monitors = getMonitors();
 	for (Monitor current : monitors) {
 		Rectangle clientArea = getMonitorClientAreaInPixels(current);
 		if (clientArea.contains(xInPixels, yInPixels)) {
-			return current;
+			return Optional.of(current);
 		}
 	}
-	return getPrimaryMonitor();
+	return Optional.empty();
 }
 
 private Rectangle getMonitorClientAreaInPixels(Monitor monitor) {

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Shell.java

@@ -1586,7 +1586,8 @@ public void setLocation(Point location) {
 
 @Override
 public void setLocation(int x, int y) {
-	Point location = display.translateLocationInPixelsInDisplayCoordinateSystem(x, y);
+	Point translatedPoint = display.translatePointIfInDisplayCoordinateGap(x, y);
+	Point location = display.translateLocationInPixelsInDisplayCoordinateSystem(translatedPoint.x, translatedPoint.y);
 	setLocationInPixels(location.x, location.y);
 }
 
@@ -1598,7 +1599,8 @@ public void setBounds(Rectangle rect) {
 
 @Override
 public void setBounds(int x, int y, int width, int height) {
-	Rectangle boundsInPixels = display.translateRectangleInPixelsInDisplayCoordinateSystemByContainment(x, y, width, height);
+	Point translatedPoint = display.translatePointIfInDisplayCoordinateGap(x, y);
+	Rectangle boundsInPixels = display.translateRectangleInPixelsInDisplayCoordinateSystemByContainment(translatedPoint.x, translatedPoint.y, width, height);
 	setBoundsInPixels(boundsInPixels.x, boundsInPixels.y, boundsInPixels.width, boundsInPixels.height);
 }