LayerData::prevState is now called fPreviousState and is now private. Added new method

PopState() to make this possible.
When a new layer is created, the font state of the desktop will now be set: this fixes
a bug I introduced when separating the font manager's default font and the desktop's
default font.
The scaling stuff looks pretty broken to me.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14675 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/servers/app/LayerData.h

@@ -1,34 +1,16 @@
-//------------------------------------------------------------------------------
+/*
-//	Copyright (c) 2001-2005, Haiku, Inc.
+ * Copyright 2001-2005, Haiku.
-//
+ * Distributed under the terms of the MIT License.
-//	Permission is hereby granted, free of charge, to any person obtaining a
+ *
-//	copy of this software and associated documentation files (the "Software"),
+ * Authors:
-//	to deal in the Software without restriction, including without limitation
+ *		DarkWyrm <[email protected]>
-//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ *		Adi Oanca <[email protected]>
-//	and/or sell copies of the Software, and to permit persons to whom the
+ *		Stephan Aßmus <[email protected]>
-//	Software is furnished to do so, subject to the following conditions:
+ */
-//
-//	The above copyright notice and this permission notice shall be included in
-//	all copies or substantial portions of the Software.
-//
-//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-//	DEALINGS IN THE SOFTWARE.
-//
-//	File Name:		LayerData.h
-//	Author:			DarkWyrm <[email protected]>
-//					Adi Oanca <[email protected]>
-//					Stephan Aßmus <[email protected]>
-//	Description:	Data classes for working with BView states and draw parameters
-//  
-//------------------------------------------------------------------------------
 #ifndef LAYER_DATA_H_
 #define LAYER_DATA_H_
 
+
 #include <GraphicsDefs.h>
 #include <InterfaceDefs.h>
 #include <Point.h>
@@ -40,11 +22,13 @@
 #include "PatternHandler.h"
 
 class BRegion;
+
 namespace BPrivate {
 	class LinkReceiver;
 	class LinkSender;
 };
 
+
 class DrawData {
  public:
 								DrawData();
@@ -199,9 +183,12 @@ class LayerData : public DrawData {
 			void				ReadFromLink(BPrivate::LinkReceiver& link);
 			void				WriteToLink(BPrivate::LinkSender& link) const;
 
- public:
+			LayerData*			PreviousState() const { return fPreviousState; }
+			LayerData*			PopState();
+
+ private:
 			// used for the state stack
-			LayerData*			prevState;
+			LayerData*			fPreviousState;
 };
 
 // inline implementations

src/servers/app/Layer.cpp

@@ -61,6 +61,7 @@
 #	define RBTRACE(x) ;
 #endif
 
+
 Layer::Layer(BRect frame, const char* name, int32 token,
 	uint32 resize, uint32 flags, DisplayDriver* driver)
 	:
@@ -105,7 +106,7 @@ Layer::Layer(BRect frame, const char* name, int32 token,
 	fAdFlags(0),
 
 	fDriver(driver),
-	fLayerData(new LayerData()),
+	fLayerData(new LayerData),
 
 	fRootLayer(NULL),
 
@@ -140,7 +141,7 @@ CRITICAL(helper);
 	STRACE(("Layer(%s) successfuly created\n", Name()));
 }
 
-//! Destructor frees all allocated heap space
+
 Layer::~Layer()
 {
 	delete fLayerData;
@@ -1019,16 +1020,12 @@ Layer::PushState()
 void
 Layer::PopState()
 {
-	if (fLayerData->prevState == NULL) {
+	if (fLayerData->PreviousState() == NULL) {
 		fprintf(stderr, "WARNING: User called BView(%s)::PopState(), but there is NO state on stack!\n", Name());
 		return;
 	}
 
-	LayerData *data = fLayerData;
+	fLayerData = fLayerData->PopState();
-	fLayerData = fLayerData->prevState;
-	data->prevState = NULL;
-	delete data;
-
 	fLayerData->SetSubPixelPrecise(fFlags & B_SUBPIXEL_PRECISE);
 }
 
@@ -1200,17 +1197,17 @@ Layer::Activated(bool active)
 	// Empty
 }
 
-// BoundsOrigin
+
 BPoint
 Layer::BoundsOrigin() const
 {
 	BPoint origin(0,0);
 	float scale = Scale();
 
-	LayerData *ld = fLayerData;
+	LayerData* layerData = fLayerData;
 	do {
-		origin += ld->Origin();
+		origin += layerData->Origin();
-	} while ((ld = ld->prevState));
+	} while ((layerData = layerData->PreviousState()) != NULL);
 
 	origin.x *= scale;
 	origin.y *= scale;
@@ -1218,19 +1215,21 @@ Layer::BoundsOrigin() const
 	return origin;
 }
 
+
 float
 Layer::Scale() const
 {
 	float scale = 1.0f;
 
-	LayerData *ld = fLayerData;
+	LayerData* layerData = fLayerData;
 	do {
-		scale *= ld->Scale();
+		scale *= layerData->Scale();
-	} while ((ld = ld->prevState));
+	} while ((layerData = layerData->PreviousState()) != NULL);
 
 	return scale;
 }
 
+
 //! Converts the passed point to parent coordinates
 BPoint
 Layer::ConvertToParent(BPoint pt)
@@ -2544,7 +2543,7 @@ Layer::_GetWantedRegion(BRegion &reg)
 //			reg.IntersectWith(&screenReg);
 			reg.IntersectWith(stackData->ClippingRegion());
 		}
-		stackData = stackData->prevState;
+		stackData = stackData->PreviousState();
 	}
 }
 

src/servers/app/LayerData.cpp

@@ -18,6 +18,7 @@
 #include "LinkReceiver.h"
 #include "LinkSender.h"
 
+#include "DesktopSettings.h"
 #include "LayerData.h"
 
 
@@ -322,44 +323,42 @@ DrawData::SetMiterLimit(float limit)
 	fMiterLimit = limit;
 }
 
-//----------------------------LayerData----------------------
-// #pragmamark -
 
-// constructpr
+//	#pragma mark -
+
+
 LayerData::LayerData()
 	: DrawData(),
-	  prevState(NULL)
+	fPreviousState(NULL)
 {
 }
 
-// LayerData
+
 LayerData::LayerData(const LayerData& data)
-	: DrawData()
+	: DrawData(data),
+	fPreviousState(data.fPreviousState)
 {
-	fClippingRegion = NULL;
-	*this = data;
 }
 
-// LayerData
+
 LayerData::LayerData(LayerData* data)
 	: DrawData(data),
-	  prevState(data)
+	fPreviousState(data)
 {
 }
 
-// destructor
+
 LayerData::~LayerData()
 {
-	delete prevState;
+	delete fPreviousState;
 }
 
-// operator=
+
 LayerData&
 LayerData::operator=(const LayerData& from)
 {
 	DrawData::operator=(from);
-
+	fPreviousState = from.PreviousState();
-	prevState = from.prevState;
 
 	return *this;
 }
@@ -539,3 +538,15 @@ LayerData::WriteToLink(BPrivate::LinkSender& link) const
 	}
 }
 
+
+LayerData*
+LayerData::PopState()
+{
+	LayerData* previous = PreviousState();
+
+	fPreviousState = NULL;
+	delete this;
+
+	return previous;
+}
+

src/servers/app/ServerWindow.cpp

@@ -446,7 +446,7 @@ ServerWindow::SetLayerState(Layer *layer, BPrivate::LinkReceiver &link)
 }
 
 
-inline Layer*
+Layer*
 ServerWindow::CreateLayerTree(BPrivate::LinkReceiver &link, Layer **_parent)
 {
 	// NOTE: no need to check for a lock. This is a private method.
@@ -481,13 +481,16 @@ ServerWindow::CreateLayerTree(BPrivate::LinkReceiver &link, Layer **_parent)
 	if (link.Code() == AS_LAYER_CREATE_ROOT
 		&& (fWinBorder->WindowFlags() & kWorkspacesWindowFlag) != 0) {
 		// this is a workspaces window!
-		newLayer = new WorkspacesLayer(frame, name, token, resizeMask,
+		newLayer = new (nothrow) WorkspacesLayer(frame, name, token, resizeMask,
 			flags, fWinBorder->GetDisplayDriver());
 	} else {
-		newLayer = new Layer(frame, name, token, resizeMask, 
+		newLayer = new (nothrow) Layer(frame, name, token, resizeMask, flags,
-			flags, fDesktop->GetDisplayDriver());
+			fWinBorder->GetDisplayDriver());
 	}
 
+	if (newLayer == NULL)
+		return NULL;
+
 	free(name);
 
 	// there is no way of setting this, other than manually :-)
@@ -497,6 +500,11 @@ ServerWindow::CreateLayerTree(BPrivate::LinkReceiver &link, Layer **_parent)
 	newLayer->fEventOptions = eventOptions;
 	newLayer->fOwner = fWinBorder;
 
+	DesktopSettings settings(fDesktop);
+	ServerFont font;
+	settings.GetDefaultPlainFont(font);
+	newLayer->fLayerData->SetFont(font);
+
 // TODO: rework the clipping stuff to remove RootLayer dependency and then
 // remove this hack:
 if (fWinBorder->IsOffscreenWindow()) {
@@ -920,21 +928,20 @@ ServerWindow::_DispatchMessage(int32 code, BPrivate::LinkReceiver &link)
 		case AS_LAYER_GET_SCALE:
 		{
 			DTRACE(("ServerWindow %s: Message AS_LAYER_GET_SCALE: Layer: %s\n", Title(), fCurrentLayer->Name()));		
-			LayerData		*ld = fCurrentLayer->fLayerData;
+			LayerData* layerData = fCurrentLayer->fLayerData;
 
 			// TODO: And here, we're taking that into account, but not above
 			// -> refactor put scale into Layer, or better yet, when the
 			// state stack is within Layer, PushState() should multiply
 			// by the previous last states scale. Would fix the problem above too.
-			float			scale = ld->Scale();
+			float scale = layerData->Scale();
 
-			while ((ld = ld->prevState))
+			while ((layerData = layerData->PreviousState()) != NULL)
-				scale *= ld->Scale();
+				scale *= layerData->Scale();
 
 			fLink.StartMessage(SERVER_TRUE);
 			fLink.Attach<float>(scale);
 			fLink.Flush();
-		
 			break;
 		}
 		case AS_LAYER_SET_PEN_LOC:
@@ -946,7 +953,6 @@ ServerWindow::_DispatchMessage(int32 code, BPrivate::LinkReceiver &link)
 			link.Read<float>(&y);
 
 			fCurrentLayer->fLayerData->SetPenLocation(BPoint(x, y));
-
 			break;
 		}
 		case AS_LAYER_GET_PEN_LOC: