Removed a couple of deadlocks caused by missing DisplayDriver unlocks

remove possible NULL pointer crash in LayerData
Added low-level clipping to ViewDriver
Some minor UI tweaks to WinBorder


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10216 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/server/DisplayDriver.cpp

@@ -146,6 +146,7 @@ void DisplayDriver::DrawBitmap(BRegion *region, ServerBitmap *bitmap, const BRec
 	if(!AcquireBuffer(&frameBuffer))
 	{
 		debugger("ERROR: Couldn't acquire framebuffer in DrawBitmap()\n");
+		Unlock();
 		return;
 	}
 	
@@ -306,6 +307,7 @@ void DisplayDriver::CopyRegionList(BList* list, BList* pList, int32 rCount, BReg
 	if(!AcquireBuffer(&frameBuffer))
 	{
 		debugger("ERROR: Couldn't acquire framebuffer in CopyRegionList()\n");
+		Unlock();
 		return;
 	}
 	
@@ -2382,6 +2384,7 @@ void DisplayDriver::FillTriangle(BPoint *pts, const BRect &bounds, const RGBColo
 		end.x=MAX(first.x,MAX(second.x,third.x));
 		StrokeSolidLine(ROUND(start.x), ROUND(start.y), ROUND(end.x), ROUND(start.y), color);
 		fCursorHandler.DriverShow();
+		Unlock();
 		return;
 	}
 
@@ -2397,6 +2400,7 @@ void DisplayDriver::FillTriangle(BPoint *pts, const BRect &bounds, const RGBColo
 		for(i=(int32)first.y+1; i<=third.y; i++)
 			StrokeSolidLine(ROUND(lineA.GetX(i)), i, ROUND(lineB.GetX(i)), i, color);
 		fCursorHandler.DriverShow();
+		Unlock();
 		return;
 	}
 	
@@ -2410,6 +2414,7 @@ void DisplayDriver::FillTriangle(BPoint *pts, const BRect &bounds, const RGBColo
 		for(i=(int32)first.y; i<third.y; i++)
 			StrokeSolidLine(ROUND(lineA.GetX(i)), i, ROUND(lineB.GetX(i)), i, color);
 		fCursorHandler.DriverShow();
+		Unlock();
 		return;
 	}
 	
@@ -2500,6 +2505,7 @@ void DisplayDriver::FillTriangle(BPoint *pts, const BRect &bounds, const DrawDat
 			end.x=MAX(first.x,MAX(second.x,third.x));
 			StrokePatternLine(ROUND(start.x), ROUND(start.y), ROUND(end.x), ROUND(start.y), d);
 			fCursorHandler.DriverShow();
+			Unlock();
 			return;
 		}
 
@@ -2515,6 +2521,7 @@ void DisplayDriver::FillTriangle(BPoint *pts, const BRect &bounds, const DrawDat
 			for(i=(int32)first.y+1; i<=third.y; i++)
 				StrokePatternLine(ROUND(lineA.GetX(i)), i, ROUND(lineB.GetX(i)), i, d);
 			fCursorHandler.DriverShow();
+			Unlock();
 			return;
 		}
 	
@@ -2528,6 +2535,7 @@ void DisplayDriver::FillTriangle(BPoint *pts, const BRect &bounds, const DrawDat
 			for(i=(int32)first.y; i<third.y; i++)
 				StrokePatternLine(ROUND(lineA.GetX(i)), i, ROUND(lineB.GetX(i)), i, d);
 			fCursorHandler.DriverShow();
+			Unlock();
 			return;
 		}
 	
@@ -2697,6 +2705,7 @@ void DisplayDriver::StrokeArc(const BRect &r, const float &angle, const float &s
 	{
 		StrokeEllipse(r,color);
 		fCursorHandler.DriverShow();
+		Unlock();
 		return;
 	}
 
@@ -2865,6 +2874,7 @@ void DisplayDriver::StrokeArc(const BRect &r, const float &angle, const float &s
 	{
 		StrokeEllipse(r,d);
 		fCursorHandler.DriverShow();
+		Unlock();
 		return;
 	}
 
@@ -3733,7 +3743,10 @@ float DisplayDriver::StringWidth(const char *string, int32 length, const DrawDat
 	FontStyle *style=font->Style();
 
 	if(!style)
+	{
+		Unlock();
 		return 0.0;
+	}
 	
 	FT_Face face;
 	FT_GlyphSlot slot;

src/servers/app/server/LayerData.cpp

@@ -49,7 +49,7 @@ DrawData::DrawData(void)
 	scale=1.0;
 	fontAliasing=true;
 
-	if(fontserver)
+	if(fontserver && fontserver->GetSystemPlain())
 		font=*(fontserver->GetSystemPlain());
 	
 	clipReg=NULL;

src/servers/app/server/ViewDriver.cpp

@@ -753,6 +753,7 @@ void ViewDriver::SetDrawData(const DrawData *d, bool set_font_data)
 		unlock=true;
 	}
 	
+	drawview->ConstrainClippingRegion(d->clipReg);
 	drawview->SetPenSize(d->pensize);
 	drawview->SetDrawingMode(d->draw_mode);
 	drawview->SetHighColor(d->highcolor.GetColor32());

src/servers/app/server/WinBorder.cpp

@@ -304,21 +304,30 @@ void WinBorder::MouseUp(PointerEvent& evt)
 	if (!(Window()->IsLocked()))
 		debugger("you must lock the attached ServerWindow object\n\t before calling WinBorder::MouseUp()\n");
 
+	click_type action;
+
+	// find out where user clicked in Decorator
+	action = fDecorator->Clicked(evt.where, evt.buttons, evt.modifiers);
+	
 	if(fIsMoving)
 	{
 		fIsMoving	= false;
 		return;
 	}
+	
 	if (fIsResizing)
 	{
 		fIsResizing	= false;
 		return;
 	}
+	
 	if (fIsZooming)
 	{
 		fIsZooming	= false;
 		fDecorator->SetZoom(false);
 		fDecorator->DrawZoom();
+		
+		if(action==DEC_ZOOM)
 			Window()->Zoom();
 		return;
 	}
@@ -327,6 +336,7 @@ void WinBorder::MouseUp(PointerEvent& evt)
 		fIsClosing	= false;
 		fDecorator->SetClose(false);
 		fDecorator->DrawClose();
+		if(action==DEC_CLOSE)
 			Window()->Quit();
 		return;
 	}
@@ -335,6 +345,7 @@ void WinBorder::MouseUp(PointerEvent& evt)
 		fIsMinimizing = false;
 		fDecorator->SetMinimize(false);
 		fDecorator->DrawMinimize();
+		if(action==DEC_MINIMIZE)
 			Window()->Minimize(true);
 		return;
 	}