Remove most uses of the method [NSView -removeSubview:].

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@33047 72102866-910b-0410-8b05-ffd578937521

Source/GSWindowDecorationView.m

@@ -38,6 +38,20 @@
 
 #import "NSToolbarFrameworkPrivate.h"
 
+@interface NSWindow (GSWindowDecorationView)
+- (void)_clearContentView;
+@end
+
+@implementation NSWindow (GSWindowDecorationView)
+/* This method prevents a recursion when removing the contet view of a window. 
+   The method [NSWindow -setContentView:] would again lead to a call to -willRemoveSubview:.
+*/
+- (void)_clearContentView
+{
+  _contentView = nil;
+}
+@end
+
 @implementation GSWindowDecorationView
 
 static inline NSRect RectWithSizeScaledByFactor(NSRect aRect, CGFloat factor)
@@ -229,21 +243,19 @@ static inline NSRect RectWithSizeScaledByFactor(NSRect aRect, CGFloat factor)
  * the old window will automatically disappear (this is how it works
  * on Apple too).
  */
-- (void) removeSubview: (NSView*)aView
+- (void) willRemoveSubview: (NSView*)aView
 {
-  RETAIN(aView);
   /*
    * If the content view is removed (for example, because it was added
    * to another view in another window), we must let the window know.
    * Otherwise, it would keep trying to resize/manage it as if it was
    * its content view, while it actually is now in another window!
    */
-  [super removeSubview: aView];
+  [super willRemoveSubview: aView];
   if (aView == [_window contentView])
     {
-      [_window setContentView: nil];
+      [_window _clearContentView];
     }
-  RELEASE(aView);
 }
 
 - (void) setBackgroundColor: (NSColor *)color

Source/NSClipView.m

@@ -773,6 +773,11 @@ static inline NSRect integralRect (NSRect rect, NSView *view)
 - (id) initWithCoder: (NSCoder*)aDecoder
 {
   self = [super initWithCoder: aDecoder];
+  if (self == nil)
+    {
+      return nil;
+    }
+
   if ([aDecoder allowsKeyedCoding])
     {
       [self setAutoresizesSubviews: YES];
@@ -793,7 +798,6 @@ static inline NSRect integralRect (NSRect rect, NSView *view)
       if ([[self subviews] count] > 0)
         {
           NSRect rect;
-
 	  id document = [aDecoder decodeObjectForKey: @"NSDocView"];
 
 	  NSAssert([document class] != [NSCustomView class],
@@ -802,14 +806,13 @@ static inline NSRect integralRect (NSRect rect, NSView *view)
 	  rect.origin = NSZeroPoint;
 	  [document setFrame: rect];
 	  RETAIN(document); // prevent it from being released.
-	  [self removeSubview: document];
+	  [document removeFromSuperview];
 	  [self setDocumentView: document];
 	  RELEASE(document);
 	}
     }
   else
     {
-      NSView *document;
       BOOL temp;
       
       [self setAutoresizesSubviews: YES];
@@ -822,9 +825,11 @@ static inline NSRect integralRect (NSRect rect, NSView *view)
       
       if ([[self subviews] count] > 0)
         {
-	  document = AUTORELEASE(RETAIN([[self subviews] objectAtIndex: 0]));
-	  [self removeSubview: document];
+          NSView *document = [[self subviews] objectAtIndex: 0];
+	  RETAIN(document); // prevent it from being released.
+	  [document removeFromSuperview];
 	  [self setDocumentView: document];
+	  RELEASE(document);
 	}
     }
   return self;

Source/NSColorPanel.m

@@ -547,7 +547,7 @@ static int _gs_gui_color_picker_mode = NSRGBModeColorPanel;
     return;
 
   if (_accessoryView != nil)
-    [_splitView removeSubview: _accessoryView];
+    [_accessoryView removeFromSuperview];
   _accessoryView = aView;
   [_splitView addSubview: _accessoryView];
 }

Source/NSMenu.m

@@ -1413,7 +1413,7 @@ static BOOL menuBarVisible = YES;
   if (_view != nil)
     {
       // remove the old representation
-      [contentView removeSubview: _view];
+      [_view removeFromSuperview];
       [_view setMenu: nil];
     }
 

Source/NSScrollView.m

@@ -278,7 +278,7 @@ static float scrollerWidth;
   [self tile];
 }
 
-- (void) removeSubview: (NSView *)aView
+- (void) willRemoveSubview: (NSView *)aView
 {
   if (aView == _contentView)
     {
@@ -292,7 +292,7 @@ static float scrollerWidth;
     {
       _cornerView = nil;
     }
-  [super removeSubview: aView];
+  [super willRemoveSubview: aView];
 }
 
 - (void) setHorizontalScroller: (NSScroller*)aScroller

Source/NSView.m

@@ -900,8 +900,7 @@ GSSetDragTypes(NSView* obj, NSArray *types)
 }
 
 /**
- * Removes the receiver from its superviews list of subviews, by
- * invoking the superviews [-removeSubview:] method.
+ * Removes the receiver from its superviews list of subviews.
  */
 - (void) removeFromSuperviewWithoutNeedingDisplay
 {
@@ -912,10 +911,9 @@ GSSetDragTypes(NSView* obj, NSArray *types)
 }
 
 /**
-  <p> Removes the receiver from its superviews list of subviews, by
-  invoking the superviews -removeSubview: method, and marks the
-  rectangle that the reciever occupied in the superview as needing
-  redisplay.  </p>
+  <p> Removes the receiver from its superviews list of subviews
+  and marks the rectangle that the reciever occupied in the 
+  superview as needing redisplay.  </p>
 
   <p> This is dangerous to use during display, since it alters the
   rectangles needing display. In this case, you can use the
@@ -925,7 +923,7 @@ GSSetDragTypes(NSView* obj, NSArray *types)
   if (_super_view != nil)
     {
       [_super_view setNeedsDisplayInRect: _frame];
-      [_super_view removeSubview: self];
+      [self removeFromSuperviewWithoutNeedingDisplay];
     }
 }