Update front-end support for registering dnd types.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@4407 72102866-910b-0410-8b05-ffd578937521

Headers/gnustep/gui/GSDragManager.h

@@ -1,37 +0,0 @@
-/* 
-   GSDragManager.h
-
-   Copyright (C) 1999 Free Software Foundation, Inc.
-
-   Author:  Richard Frith-Macdonald <richard@brainstorm.co.uk>
-   Date: June 1999
-  
-   This file is part of the GNUstep GUI Library.
-
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public
-   License as published by the Free Software Foundation; either
-   version 2 of the License, or (at your option) any later version.
-   
-   This library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with this library; see the file COPYING.LIB.
-   If not, write to the Free Software Foundation,
-   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-*/ 
-
-#ifndef _GNUstep_H_GSDragManager
-#define _GNUstep_H_GSDragManager
-
-#include <Foundation/Foundation.h>
-
-NSArray	*GSGetDragTypes(id obj);
-void	GSRegisterDragTypes(id obj, NSArray *types);
-void	GSUnregisterDragTypes(id obj);
-
-#endif
-

Headers/gnustep/gui/NSGraphicsContext.h

@@ -31,6 +31,8 @@
 
 #include <Foundation/NSObject.h>
 #include <Foundation/NSGeometry.h>
+#include <Foundation/NSMapTable.h>
+#include <Foundation/NSSet.h>
 
 #include <AppKit/GSMethodTable.h>
 
@@ -100,6 +102,7 @@ typedef enum _NSWindowOrderingMode
   NSMutableData		*context_data;
   NSMutableArray	*focus_stack;
   NSMutableArray	*event_queue;
+  NSMapTable		*drag_types;
 }
 
 + (NSGraphicsContext*) currentContext;
@@ -129,6 +132,13 @@ NSGraphicsContext	*GSCurrentContext();
 - (void) lockFocusView: (NSView*)aView inRect: (NSRect)rect;
 - (void) unlockFocusView: (NSView*)aView needsFlush: (BOOL)flush;
 
+/*
+ *	Drag and drop support
+ */
+- (BOOL) _addDragTypes: (NSArray*)types toWindow: (int)winNum;
+- (BOOL) _removeDragTypes: (NSArray*)types fromWindow: (int)winNum;
+- (NSCountedSet*) _dragTypesForWindow: (int)winNum;
+
 @end
 #endif
 

Headers/gnustep/gui/NSView.h

@@ -378,6 +378,10 @@ enum {
 @end
 #endif
 
+/*
+ * GNUstep specific function to determine the drag types registered for a view.
+ */
+extern NSArray *GSGetDragTypes(NSView* aView);
 
 /* Notifications */
 extern NSString *NSViewFrameDidChangeNotification;

Source/GNUmakefile

@@ -109,7 +109,6 @@ NSView.m \
 NSWindow.m \
 NSWorkspace.m \
 GSTrackingRect.m \
-GSDragManager.m \
 GSServicesManager.m \
 tiff.m \
 externs.m
@@ -213,7 +212,6 @@ AppKit/GSMethodTable.h \
 AppKit/DPSOperators.h \
 AppKit/PSOperators.h \
 AppKit/GSPasteboardServer.h \
-AppKit/GSDragManager.h \
 AppKit/GSServicesManager.h
 
 -include GNUmakefile.preamble

Source/GSDragManager.m

@@ -1,75 +0,0 @@
-/* 
-   GSDragManager.m
-
-   Copyright (C) 1999 Free Software Foundation, Inc.
-
-   Author:  Richard Frith-Macdonald <richard@brainstorm.co.uk>
-   Date: June 1999
-  
-   This file is part of the GNUstep GUI Library.
-
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public
-   License as published by the Free Software Foundation; either
-   version 2 of the License, or (at your option) any later version.
-   
-   This library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with this library; see the file COPYING.LIB.
-   If not, write to the Free Software Foundation,
-   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-*/ 
-
-#include <gnustep/gui/config.h>
-
-#include <Foundation/Foundation.h>
-#include <AppKit/AppKit.h>
-
-/*
- *	Stuff to maintain a map table so we know what windows and views are
- *	registered for drag and drop.
- *	FIXME - may need locks for thread safety?
- */
-static NSMapTable	*typesMap = 0;
-
-static inline void
-GSSetupDragTypes()
-{
-  if (typesMap == 0)
-    {
-      typesMap = NSCreateMapTable(NSNonOwnedPointerMapKeyCallBacks,
-                NSObjectMapValueCallBacks, 0);
-    }
-}
-
-NSArray*
-GSGetDragTypes(id obj)
-{
-  GSSetupDragTypes();
-  return NSMapGet(typesMap, (void*)(gsaddr)obj);
-}
-
-void
-GSRegisterDragTypes(id obj, NSArray *types)
-{
-  NSArray	*m = [types mutableCopy];
-  NSArray	*t = [m copy];
-
-  RELEASE(m);
-  GSSetupDragTypes();
-  NSMapInsert(typesMap, (void*)(gsaddr)obj, (void*)(gsaddr)t);
-  RELEASE(t);
-}
-
-void
-GSUnregisterDragTypes(id obj)
-{
-  GSSetupDragTypes();
-  NSMapRemove(typesMap, (void*)(gsaddr)obj);
-}
-
-

Source/NSGraphicsContext.m

@@ -155,6 +155,7 @@ struct NSWindow_struct
   DESTROY(context_data);
   DESTROY(context_info);
   DESTROY(event_queue);
+  NSFreeMapTable(drag_types);
   [super dealloc];
 }
 
@@ -182,6 +183,8 @@ struct NSWindow_struct
 			initWithCapacity: 1];
   event_queue = [[NSMutableArray allocWithZone: [self zone]]
 			initWithCapacity: 32];
+  drag_types = NSCreateMapTable(NSIntMapKeyCallBacks,
+                NSObjectMapValueCallBacks, 0);
 
   /*
    * The classMethodTable dictionary and the list of all contexts must both
@@ -263,6 +266,90 @@ struct NSWindow_struct
   [focus_stack removeLastObject];
 }
 
+/*
+ *      Drag and drop support
+ */
+
+/*
+ * Add (increment count by 1) each drag type to those registered
+ * for the window.  If this results in a change to the types registered
+ * in the counted set, return YES, otherwise return NO.
+ * Subclasses should override this method, call 'super' and take
+ * appropriate action if the method returns 'YES'.
+ */
+- (BOOL) _addDragTypes: (NSArray*)types toWindow: (int)winNum
+{
+  NSCountedSet	*old = (NSCountedSet*)NSMapGet(drag_types, winNum);
+  unsigned	originalCount;
+  unsigned	i = [types count];
+
+  /*
+   * Make sure the set exists.
+   */
+  if (old == nil)
+    {
+      old = [NSCountedSet new];
+      NSMapInsert(drag_types, (void*)winNum, (void*)(gsaddr)old);
+      RELEASE(old);
+    }
+  originalCount = [old count];
+
+  while (i-- > 0)
+    {
+      id	o = [types objectAtIndex: i];
+
+      [old removeObject: o];
+    }
+  if ([old count] == originalCount)
+    return NO;
+  return YES;
+}
+
+/*
+ * Remove (decrement count by 1) each drag type from those registered
+ * for the window.  If this results in a change to the types registered
+ * in the counted set, return YES, otherwise return NO.
+ * If given 'nil' as the array of types, remove ALL.
+ * Subclasses should override this method, call 'super' and take
+ * appropriate action if the method returns 'YES'.
+ */
+- (BOOL) _removeDragTypes: (NSArray*)types fromWindow: (int)winNum
+{
+  NSCountedSet	*old = (NSCountedSet*)NSMapGet(drag_types, winNum);
+
+  if (types == nil)
+    {
+      if (old == nil)
+	return NO;
+      NSMapRemove(drag_types, (void*)winNum);
+      return YES;
+    }
+  else if (old == nil)
+    {
+      return NO;
+    }
+  else
+    {
+      unsigned	originalCount = [old count];
+      unsigned	i = [types count];
+
+      while (i-- > 0)
+	{
+	  id	o = [types objectAtIndex: i];
+
+	  [old removeObject: o];
+	}
+      if ([old count] == originalCount)
+	return NO;
+      return YES;
+    }
+}
+
+- (NSCountedSet*) _dragTypesForWindow: (int)winNum
+{
+  return (NSCountedSet*)NSMapGet(drag_types, winNum);
+}
+
 @end
 
 @implementation NSGraphicsContext (Private)

Source/NSView.m

@@ -47,7 +47,6 @@
 
 #include <AppKit/NSView.h>
 #include <AppKit/NSWindow.h>
-#include <AppKit/GSDragManager.h>
 #include <AppKit/GSTrackingRect.h>
 #include <AppKit/NSAffineTransform.h>
 
@@ -67,6 +66,72 @@ static SEL	appSel = @selector(appendTransform:);
 static void	(*invalidateImp)(NSView*, SEL) = 0;
 static SEL	invalidateSel = @selector(_invalidateCoordinates);
 
+/*
+ *	Stuff to maintain a map table so we know what views are
+ *	registered for drag and drop - we don't store the info in
+ *	the view directly 'cot it would take up a pointer in each
+ *	view and the vast majority of views wouldn't use it.
+ *	Types are not registered/unregistered often enough for the
+ *	performance of this mechanism to be an issue.
+ */
+static NSMapTable	*typesMap = 0;
+static NSLock		*typesLock = nil;
+
+/*
+ * This is the only external interface to the drag types info.
+ */
+NSArray*
+GSGetDragTypes(NSView *obj)
+{
+  NSArray	*t;
+
+  [typesLock lock];
+  t = (NSArray*)NSMapGet(typesMap, (void*)(gsaddr)obj);
+  [typesLock unlock];
+  return t;
+}
+
+static void
+GSRemoveDragTypes(NSView* obj)
+{
+  [typesLock lock];
+  NSMapRemove(typesMap, (void*)(gsaddr)obj);
+  [typesLock unlock];
+}
+
+static NSArray*
+GSSetDragTypes(NSView* obj, NSArray *types)
+{
+  unsigned	count = [types count];
+  NSString	*strings[count];
+  NSArray	*t;
+  unsigned	i;
+
+  /*
+   * Make a new array with copies of the type strings so we don't get
+   * them mutated by someone else.
+   */
+  [types getObjects: strings];
+  for (i = 0; i < count; i++)
+    {
+      strings[i] = [strings[i] copy];
+    }
+  t = [NSArray arrayWithObjects: strings count: count];
+  for (i = 0; i < count; i++)
+    {
+      RELEASE(strings[i]);
+    }
+  /*
+   * Store it.
+   */
+  [typesLock lock];
+  NSMapInsert(typesMap, (void*)(gsaddr)obj, (void*)(gsaddr)t);
+  [typesLock unlock];
+  return t;
+}
+
+
+
 /*
  * Class methods
  */
@@ -77,6 +142,10 @@ static SEL	invalidateSel = @selector(_invalidateCoordinates);
       Class	matrixClass = [NSAffineTransform class];
       NSAffineTransformStruct	ats = { 1, 0, 0, -1, 0, 1 };
 
+      typesMap = NSCreateMapTable(NSNonOwnedPointerMapKeyCallBacks,
+                NSObjectMapValueCallBacks, 0);
+      typesLock = [NSLock new];
+
       appImp = (void (*)(NSAffineTransform*, SEL, NSAffineTransform*))
 		[matrixClass instanceMethodForSelector: appSel];
 
@@ -405,7 +474,21 @@ static SEL	invalidateSel = @selector(_invalidateCoordinates);
 
 - (void) viewWillMoveToWindow: (NSWindow*)newWindow
 {
+  if (newWindow == window)
+    return;
+
+  if (_rFlags.has_draginfo)
+    {
+      NSGraphicsContext	*ctxt = GSCurrentContext();
+      NSArray		*t = GSGetDragTypes(self);
+
+      if (window != nil)
+	[ctxt _removeDragTypes: t fromWindow: [window windowNumber]];
+      [ctxt _addDragTypes: t toWindow: [newWindow windowNumber]];
+    }
+
   window = newWindow;
+
   if (_rFlags.has_subviews)
     {
       unsigned	count = [sub_views count];
@@ -1772,17 +1855,56 @@ static NSView* findByTag(NSView *view, int aTag, unsigned *level)
 	 slideBack: (BOOL)slideFlag
 {}
 
-- (void) registerForDraggedTypes: (NSArray*)newTypes
+- (void) registerForDraggedTypes: (NSArray*)types
 {
-  GSRegisterDragTypes(self, newTypes);
+  NSArray	*o;
+  NSArray	*t;
+
+  if (types == nil || [types count] == 0)
+    [NSException raise: NSInvalidArgumentException
+		format: @"Types information missing"];
+
+  /*
+   * Get the old drag types for this view if we need to tell the context
+   * to change the registered types for the window.
+   */
+  if (_rFlags.has_draginfo == 1 && window != nil)
+    {
+      o = GSGetDragTypes(self);
+      TEST_RETAIN(o);
+    }
+  else
+    {
+      o = nil;
+    }
+
+  t = GSSetDragTypes(self, types);
   _rFlags.has_draginfo = 1;
+  if (window != nil)
+    {
+      NSGraphicsContext	*ctxt = GSCurrentContext();
+
+      [ctxt _addDragTypes: t toWindow: [window windowNumber]];
+      if (o != nil)
+	{
+	  [ctxt _removeDragTypes: t fromWindow: [window windowNumber]];
+	}
+    }
+  TEST_RELEASE(o);
 }
 
 - (void) unregisterDraggedTypes
 {
   if (_rFlags.has_draginfo)
     {
-      GSUnregisterDragTypes(self);
+      if (window != nil)
+	{
+	  NSGraphicsContext	*ctxt = GSCurrentContext();
+	  NSArray		*t = GSGetDragTypes(self);
+
+	  [ctxt _removeDragTypes: t fromWindow: [window windowNumber]];
+	}
+      GSRemoveDragTypes(self);
       _rFlags.has_draginfo = 0;
     }
 }

Source/NSWindow.m

@@ -181,7 +181,12 @@ static Class	responderClass;
   TEST_RELEASE(miniaturized_image);
   TEST_RELEASE(window_title);
   TEST_RELEASE(rectsBeingDrawn);
-  [self unregisterDraggedTypes];
+  
+  /*
+   * FIXME This should not be necessary - the views should have removed
+   * their drag types, so we should already have been removed.
+   */
+  [GSCurrentContext() _removeDragTypes: nil fromWindow: [self windowNumber]];
 
   [super dealloc];
 }
@@ -1464,17 +1469,17 @@ static Class	responderClass;
 
 - (void) registerForDraggedTypes: (NSArray*)newTypes
 {
-  GSRegisterDragTypes(self, newTypes);
-  _rFlags.has_draginfo = 1;
+  /*
+   * Ensure we have a content view and it's associated window view.
+   */
+  if (content_view == nil)
+    [self setContentView: nil];
+  [[content_view superView] registerForDraggedTypes: newTypes];
 }
 
 - (void) unregisterDraggedTypes
 {
-  if (_rFlags.has_draginfo)
-    {
-      GSUnregisterDragTypes(self);
-      _rFlags.has_draginfo = 0;
-    }
+  [[content_view superView] unregisterDraggedTypes];
 }
 
 /*