Implementation of deferred windows

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@7623 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,5 +1,18 @@
 2000-09-27  Adam Fedor  <fedor@gnu.org>
 
+	* Implementation of deferred windows (with the help of
+        mirko.viviani@rccr.cremona.it)
+	* Source/NSClipView.m (-setBoundsOrigin:): Make sure window
+	is not deferred before attempting to draw.
+	* Source/NSMenu.m (-init): Defer window.
+	* Source/NSView.m (-lockFocusInRect:): Don't lock if window is 
+	deferred.
+	(-unlockFocus): Likewise.
+	* Source/NSWindow.m (_initBackendWindow:): New method.
+	(-initWithContentRect:styleMask:backing:defer:screen:): Use it
+	if not deferring.
+	(-orderWindow:relativeTo:): Create window if deferred.
+	
 	* Source/tiff.m (NSTiffRead): For PHOTOMETRIC_PALETTE, don't free
 	colormap tables, they are owned by libtiff.
 

Source/NSClipView.m

@@ -116,7 +116,7 @@
   if (_documentView == nil)
     return;
 
-  if (_copiesOnScroll && _window)
+  if (_copiesOnScroll && _window && [_window gState])
     {
       // copy the portion of the view that is common before 
       // and after scrolling.

Source/NSMenu.m

@@ -1295,7 +1295,7 @@ static NSString	*NSMenuLocationsKey = @"NSMenuLocations";
   self = [self initWithContentRect: NSZeroRect
 			 styleMask: NSBorderlessWindowMask
 			   backing: NSBackingStoreBuffered
-			     defer: NO];
+			     defer: YES];
   return self;
 }
 

Source/NSView.m

@@ -1259,8 +1259,12 @@ GSSetDragTypes(NSView* obj, NSArray *types)
   NSGraphicsContext *ctxt = GSCurrentContext();
   struct NSWindow_struct *window_t;
   NSRect wrect;
+  int window_gstate;
 
   NSAssert(_window != nil, NSInternalInconsistencyException);
+  /* Check for deferred window */
+  if ((window_gstate = [_window gState]) == 0)
+    return;
 
   [ctxt lockFocusView: self inRect: rect];
   wrect = [self convertRect: rect toView: nil];
@@ -1280,12 +1284,9 @@ GSSetDragTypes(NSView* obj, NSArray *types)
     }
   else
     {
-      int window_gstate;
       NSAffineTransform *matrix;
       float x, y, w, h;
 
-      window_gstate = [_window gState];
-      NSAssert(window_gstate, NSInternalInconsistencyException);
       DPSsetgstate(ctxt, window_gstate);
       DPSgsave(ctxt);
       matrix = [self _matrixToWindow];
@@ -1331,6 +1332,9 @@ GSSetDragTypes(NSView* obj, NSArray *types)
   NSGraphicsContext *ctxt = GSCurrentContext();
 
   NSAssert(_window != nil, NSInternalInconsistencyException);
+  /* Check for deferred window */
+  if ([_window gState] == 0)
+    return;
 
   /* Restore our original gstate */
   DPSgrestore(ctxt);

Source/NSWindow.m

@@ -560,6 +560,35 @@ static NSMapTable* windowmaps = NULL;
   [super dealloc];
 }
 
+- (void) _initBackendWindow: (NSRect)frame
+{
+  NSGraphicsContext	*context = GSCurrentContext();
+
+  frame = [NSWindow contentRectForFrameRect: frame styleMask: _styleMask];
+  DPSwindow(context, NSMinX(frame), NSMinY(frame),
+	    NSWidth(frame), NSHeight(frame),
+	    _backingType, &_windowNum);
+  DPSstylewindow(context, _styleMask, _windowNum);
+  DPSsetwindowlevel(context, [self level], _windowNum);
+
+  // Set window in new _gstate
+  DPSgsave(context);
+  DPSwindowdevice(context, _windowNum);
+  DPSgstate(context);
+  _gstate = GSWDefineAsUserObj(context);
+  DPSgrestore(context);
+  NSMapInsert (windowmaps, (void*)_windowNum, self);
+
+  if (NSIsEmptyRect([_wv frame]))
+    {
+      frame.origin = NSZeroPoint;
+      [_wv setFrame: frame];
+      [_wv setNeedsDisplay: YES];
+    }
+  NSDebugLLog(@"NSWindow", @"Created NSWindow frame %@",
+	      NSStringFromRect(_frame));
+}
+
 /*
  * Initializing and getting a new NSWindow object
  */
@@ -583,7 +612,6 @@ static NSMapTable* windowmaps = NULL;
 		     defer: (BOOL)flag
 		    screen: (NSScreen*)aScreen
 {
-  NSGraphicsContext	*context = GSCurrentContext();
   NSRect		cframe;
 
   NSDebugLog(@"NSWindow default initializer\n");
@@ -628,21 +656,16 @@ static NSMapTable* windowmaps = NULL;
      part a view is drawing in, so NSWindow only has to flush that portion */
   _rectsBeingDrawn = RETAIN([NSMutableArray arrayWithCapacity: 10]);
 
-  // FIXME: If flag is YES, the creation of the window should be defered
-  DPSwindow(context, NSMinX(contentRect), NSMinY(contentRect),
-	    NSWidth(contentRect), NSHeight(contentRect),
-	    bufferingType, &_windowNum);
-  DPSstylewindow(context, aStyle, _windowNum);
-  DPSsetwindowlevel(context, [self level], _windowNum);
-
-  // Set window in new _gstate
-  DPSgsave(context);
-  DPSwindowdevice(context, _windowNum);
-  DPSgstate(context);
-  _gstate = GSWDefineAsUserObj(context);
-  DPSgrestore(context);
-
-  NSMapInsert (windowmaps, (void*)_windowNum, self);
+  /* Create window (if not deferred) */
+  _windowNum = 0;
+  _gstate = 0;
+  if (flag == NO)
+    {
+      NSDebugLLog(@"NSWindow", @"Creating NSWindow\n");
+      [self _initBackendWindow: _frame];
+    }
+  else
+    NSDebugLLog(@"NSWindow", @"Defering NSWindow creation\n");
 
   NSDebugLog(@"NSWindow end of init\n");
   return self;
@@ -1037,6 +1060,9 @@ static NSMapTable* windowmaps = NULL;
 
 - (void) orderWindow: (NSWindowOrderingMode)place relativeTo: (int)otherWin
 {
+  NSGraphicsContext *context = GSCurrentContext();
+  BOOL display = NO;
+
   if (place == NSWindowOut)
     {
       _f.visible = NO;
@@ -1052,7 +1078,19 @@ static NSMapTable* windowmaps = NULL;
 	}
       [self _lossOfKeyOrMainWindow];
     }
-  DPSorderwindow(GSCurrentContext(), place, otherWin, _windowNum);
+  else
+    {
+      // create deferred window
+      if(_windowNum == 0)
+	{
+	  [self _initBackendWindow: _frame];
+	  display = YES;
+	}
+    }
+  DPSorderwindow(context, place, otherWin, _windowNum);
+  if (display)
+    [self display];
+
   if (place != NSWindowOut)
     {
       if (_rFlags.needs_display == NO)
@@ -1091,8 +1129,8 @@ static NSMapTable* windowmaps = NULL;
 	}
       if ([self isKeyWindow] == YES)
 	{
-	  DPSsetinputstate(GSCurrentContext(), _windowNum, GSTitleBarKey);
-	  DPSsetinputfocus(GSCurrentContext(), _windowNum);
+	  DPSsetinputstate(context, _windowNum, GSTitleBarKey);
+	  DPSsetinputfocus(context, _windowNum);
 	}
     }
 }
@@ -1272,8 +1310,11 @@ static NSMapTable* windowmaps = NULL;
    * Now we can tell the graphics context to do the actual resizing.
    * We will recieve an event to tell us when the resize is done.
    */
+  if(_gstate)
   DPSplacewindow(GSCurrentContext(), frameRect.origin.x, frameRect.origin.y,
     frameRect.size.width, frameRect.size.height, _windowNum);
+  else
+    _frame = frameRect;
 
   if (flag)
     [self display];
@@ -1381,6 +1422,9 @@ static NSMapTable* windowmaps = NULL;
 
 - (void) display
 {
+  if (_gstate == 0 || _f.visible == NO)
+    return;
+
   _rFlags.needs_display = NO;
   // FIXME: Is the first responder processing needed here?
   if ((!_firstResponder) || (_firstResponder == self))
@@ -1472,6 +1516,7 @@ static NSMapTable* windowmaps = NULL;
        [[_rectsBeingDrawn objectAtIndex: i] rectValue]);
     }
 
+  if (_windowNum)
     DPSflushwindowrect(context,
 		       NSMinX(_rectNeedingFlush), NSMinY(_rectNeedingFlush),
 		       NSWidth(_rectNeedingFlush), NSHeight(_rectNeedingFlush),