cocoa: move interfaces to header (guarded by ifdef __OBJC__)

src/backend/cocoa.m

@@ -12,14 +12,6 @@
 
 #include "../../external/stb_ds.h"
 
-@interface MilskoCocoaPixmap : NSObject {
-	NSImage* image;
-}
-+ (MilskoCocoaPixmap*)newWithWidth:(int)width height:(int)height;
-- (void)updateWithData:(void*)data;
-- (void)destroy;
-@end
-
 @implementation MilskoCocoaPixmap
 
 + (MilskoCocoaPixmap*)newWithWidth:(int)width height:(int)height {
@@ -40,49 +32,6 @@
 }
 @end
 
-@interface MilskoCocoa : NSObject {
-	NSApplication* application;
-	NSWindow*      window;
-	NSRect	       rect;
-}
-
-+ (MilskoCocoa*)newWithParent:(MwLL)parent
-			    x:(int)x
-			    y:(int)y
-			width:(int)width
-		       height:(int)height;
-- (void)polygonWithPoints:(MwPoint*)points
-	     points_count:(int)points_count
-		    color:(MwLLColor)color;
-- (void)lineWithPoints:(MwPoint*)points color:(MwLLColor)color;
-- (void)getX:(int*)x Y:(int*)y W:(unsigned int*)w H:(unsigned int*)h;
-- (void)setX:(int)x Y:(int)y;
-- (void)setW:(int)w H:(int)h;
-- (int)pending;
-- (void)getNextEvent;
-- (void)setTitle:(const char*)title;
-- (void)drawPixmap:(MwLLPixmap)pixmap rect:(MwRect*)rect;
-- (void)setIcon:(MwLLPixmap)pixmap;
-- (void)forceRender;
-- (void)setCursor:(MwCursor*)image mask:(MwCursor*)mask;
-- (void)detachWithPoint:(MwPoint*)point;
-- (void)show:(int)show;
-- (void)makePopupWithParent:(MwLL)parent;
-- (void)setSizeHintsWithMinX:(int)minx
-			MinY:(int)miny
-			MaxX:(int)maxx
-			MaxY:(int)maxy;
-- (void)makeBorderless:(int)toggle;
-- (void)focus;
-- (void)grabPointer:(int)toggle;
-- (void)setClipboard:(const char*)text;
-- (void)makeToolWindow;
-- (void)getCursorCoord:(MwPoint*)point;
-- (void)getScreenSize:(MwRect*)rect;
-- (void)destroy;
-
-@end
-
 @implementation MilskoCocoa
 
 + (MilskoCocoa*)newWithParent:(MwLL)parent