macos: use native zoom/unzoom logic

In macOS, when moving a maximized window, it's not automatically
restored to its default size.

In addition, GdkMacosWindow should not check surface layout properties,
since those properties are lagging, e.i. are set after the (native)
window state has been updated.

gdk/macos/GdkMacosWindow.c

@@ -405,7 +405,6 @@ typedef NSString *CALayerContentsGravity;
 
 -(void)beginManualMove
 {
-  gboolean maximized = GDK_SURFACE (gdk_surface)->state & GDK_TOPLEVEL_STATE_MAXIMIZED;
   NSPoint initialMoveLocation;
   GdkPoint point;
   GdkMonitor *monitor;
@@ -424,13 +423,6 @@ typedef NSString *CALayerContentsGravity;
 
   initialMoveLocation = [NSEvent mouseLocation];
 
-  if (maximized)
-    [self setFrame:NSMakeRect (initialMoveLocation.x - (int)lastUnmaximizedFrame.size.width/2,
-                               initialMoveLocation.y,
-                               lastUnmaximizedFrame.size.width,
-                               lastUnmaximizedFrame.size.height)
-           display:YES];
-
   _gdk_macos_display_from_display_coords ([self gdkDisplay],
                                           initialMoveLocation.x,
                                           initialMoveLocation.y,
@@ -773,26 +765,11 @@ typedef NSString *CALayerContentsGravity;
   return rect;
 }
 
+/* Implementing this method avoids new windows move around the screen. */
 -(NSRect)windowWillUseStandardFrame:(NSWindow *)nsWindow
                        defaultFrame:(NSRect)newFrame
 {
-  NSRect screenFrame = [[self screen] visibleFrame];
-  GdkMacosSurface *surface = gdk_surface;
-  gboolean maximized = GDK_SURFACE (surface)->state & GDK_TOPLEVEL_STATE_MAXIMIZED;
-
-  if (!maximized)
-    return screenFrame;
-  else
-    return lastUnmaximizedFrame;
-}
-
-// Only called on zoom, not on unzoom
--(BOOL)windowShouldZoom:(NSWindow *)nsWindow
-                toFrame:(NSRect)newFrame
-{
-  lastUnmaximizedFrame = [nsWindow frame];
-
-  return YES;
+  return newFrame;
 }
 
 -(NSSize)window:(NSWindow *)window willUseFullScreenContentSize:(NSSize)proposedSize

gdk/macos/GdkMacosWindow.h

@@ -49,7 +49,6 @@
 
   EdgeSnapping     snapping;
 
-  NSRect           lastUnmaximizedFrame;
   NSRect           lastUnfullscreenFrame;
   BOOL             inFullscreenTransition;
 }