Bug 225984 DRefTool analysis for beos files

r=roc sr=roc

gfx/src/beos/nsFontMetricsBeOS.cpp

@@ -134,6 +134,8 @@ NS_IMETHODIMP nsFontMetricsBeOS::Init(const nsFont& aFont, nsIAtom* aLangGroup,
   PRInt16  face = 0;
 
   mFont = new nsFont(aFont);
+  if (!mFont)
+    return NS_ERROR_OUT_OF_MEMORY;
 
   float       app2dev, app2twip;
   aContext->GetAppUnitsToDevUnits(app2dev);

gfx/src/beos/nsRenderingContextBeOS.cpp

@@ -81,7 +81,7 @@ nsRenderingContextBeOS::~nsRenderingContextBeOS() {
 		mStateCache = nsnull;
 	}
 	
-	if (mTranMatrix) delete mTranMatrix;
+	delete mTranMatrix;
 	NS_IF_RELEASE(mOffscreenSurface);
 	NS_IF_RELEASE(mFontMetrics);
 	NS_IF_RELEASE(mContext);
@@ -113,11 +113,14 @@ NS_IMETHODIMP nsRenderingContextBeOS::Init(nsIDeviceContext *aContext, nsDrawing
 }
 
 NS_IMETHODIMP nsRenderingContextBeOS::CommonInit() {
-	mContext->GetDevUnitsToAppUnits(mP2T);
-	float app2dev;
-	mContext->GetAppUnitsToDevUnits(app2dev);
-	mTranMatrix->AddScale(app2dev, app2dev);
-	return NS_OK;
+  if (!mTranMatrix)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  mContext->GetDevUnitsToAppUnits(mP2T);
+  float app2dev;
+  mContext->GetAppUnitsToDevUnits(app2dev);
+  mTranMatrix->AddScale(app2dev, app2dev);
+  return NS_OK;
 }
 
 // We like PRUnichar rendering, hopefully it's not slowing us too much
@@ -167,28 +170,40 @@ NS_IMETHODIMP nsRenderingContextBeOS::GetDeviceContext(nsIDeviceContext *&aConte
 // Get a new GS
 NS_IMETHODIMP nsRenderingContextBeOS::PushState() {
 #ifdef USE_GS_POOL
-	nsGraphicsState *state = nsGraphicsStatePool::GetNewGS();
+  nsGraphicsState *state = nsGraphicsStatePool::GetNewGS();
 #else
-	nsGraphicsState *state = new nsGraphicsState;
+  nsGraphicsState *state = new nsGraphicsState;
 #endif
+  // Push into this state object, add to vector
+  if (!state) return NS_ERROR_OUT_OF_MEMORY;
 
-	// Push into this state object, add to vector
-	if (!state) return NS_ERROR_FAILURE;
-	
-	state->mMatrix = mTranMatrix;
-	if (nsnull == mTranMatrix) mTranMatrix = new nsTransform2D();
-	else mTranMatrix = new nsTransform2D(mTranMatrix);
-	
-	// Set state to mClipRegion. SetClip{Rect,Region}() will do copy-on-write stuff
-	state->mClipRegion = mClipRegion;
-	
-	NS_IF_ADDREF(mFontMetrics);
-	state->mFontMetrics = mFontMetrics;
-	state->mColor = mCurrentColor;
-	state->mLineStyle = mCurrentLineStyle;
-	
-	mStateCache->AppendElement(state);
-	return NS_OK;
+  nsTransform2D *tranMatrix;
+  if (nsnull == mTranMatrix)
+    tranMatrix = new nsTransform2D();
+  else
+    tranMatrix = new nsTransform2D(mTranMatrix);
+
+  if (!tranMatrix) {
+#ifdef USE_GS_POOL
+    nsGraphicsStatePool::ReleaseGS(state);
+#else
+    delete state;
+#endif
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  state->mMatrix = mTranMatrix;
+  mTranMatrix = tranMatrix;
+
+  // Set state to mClipRegion. SetClip{Rect,Region}() will do copy-on-write stuff
+  state->mClipRegion = mClipRegion;
+
+  NS_IF_ADDREF(mFontMetrics);
+  state->mFontMetrics = mFontMetrics;
+  state->mColor = mCurrentColor;
+  state->mLineStyle = mCurrentLineStyle;
+
+  mStateCache->AppendElement(state);
+  return NS_OK;
 }
 
 NS_IMETHODIMP nsRenderingContextBeOS::PopState(PRBool &aClipEmpty) {
@@ -201,7 +216,7 @@ NS_IMETHODIMP nsRenderingContextBeOS::PopState(PRBool &aClipEmpty) {
 		
 		// Assign all local attributes from the state object just popped
 		if (state->mMatrix) {
-			if (mTranMatrix) delete mTranMatrix;
+			delete mTranMatrix;
 			mTranMatrix = state->mMatrix;
 		}
 		

widget/src/beos/nsAppShell.cpp

@@ -432,12 +432,12 @@ void nsAppShell::RetrieveAllEvents(bool blockable)
   while(true)
   {
     EventItem *newitem = new EventItem;
+    if ( !newitem ) break;
+
     newitem->code = 0;
     newitem->ifdata.data = nsnull;
     newitem->ifdata.sync = 0;
 
-    if ( !newitem ) break;
-    
     // only block on read_port when 
     //   blockable == true
     //   and

widget/src/beos/nsWindow.cpp

@@ -1247,31 +1247,31 @@ nsIFontMetrics* nsWindow::GetFont(void)
 //-------------------------------------------------------------------------
 NS_METHOD nsWindow::SetFont(const nsFont &aFont)
 {
-	// Cache Font for owner draw
-	if (mFont == nsnull) {
-		mFont = new nsFont(aFont);
-	} else {
-		*mFont  = aFont;
-	}
+  // Cache Font for owner draw
+  if (mFont == nsnull) {
+    if (!(mFont = new nsFont(aFont)))
+      return NS_ERROR_OUT_OF_MEMORY;
+  } else {
+    *mFont = aFont;
+  }
 
-	// Bail out if there is no context
-	if (nsnull == mContext) {
-		return NS_ERROR_FAILURE;
-	}
+  // Bail out if there is no context
+  if (nsnull == mContext) {
+    return NS_ERROR_FAILURE;
+  }
 
-	nsIFontMetrics* metrics;
-	mContext->GetMetricsFor(aFont, metrics);
-	nsFontHandle  fontHandle;
-	metrics->GetFontHandle(fontHandle);
-	BFont *font = (BFont*)fontHandle;
-	if(font && mView && mView->LockLooper())
-	{
-		mView->SetFont(font, B_FONT_ALL);
-		mView->UnlockLooper();
-	}
-	NS_RELEASE(metrics);
+  nsCOMPtr<nsIFontMetrics> metrics;
+  mContext->GetMetricsFor(aFont, getter_AddRefs(metrics));
+  nsFontHandle fontHandle;
+  metrics->GetFontHandle(fontHandle);
+  BFont *font = (BFont*)fontHandle;
+  if(font && mView && mView->LockLooper())
+  {
+    mView->SetFont(font, B_FONT_ALL);
+    mView->UnlockLooper();
+  }
 
-	return NS_OK;
+  return NS_OK;
 }
 
 

xpfe/bootstrap/nsNativeAppSupportBeOS.cpp

@@ -148,33 +148,34 @@ nsSplashScreenBeOS::Observe(nsISupports *aSubject,
                             const char *aTopic,
                             const PRUnichar *someData)
 {
-	if (!bitmap) return NS_OK;
-	nsCAutoString statusString;
-	statusString.AssignWithConversion(someData);
-	if (textView == NULL) {
-		BRect textRect = bitmap->Bounds();
-		// Reduce the view size, and take into account the image frame
-		textRect.bottom -= 10;
-		textRect.left += 10;
-		textRect.right -= 10; 
-		textRect.top = textRect.bottom - 20;
-		textView = new BStringView(textRect,
-		                           "splash text",
-		                           statusString.get(), 
-		                           B_FOLLOW_LEFT | B_FOLLOW_V_CENTER);
-		textView->SetViewColor(B_TRANSPARENT_COLOR);
-		textView->SetHighColor(255,255,255,0);
-		textView->SetLowColor(0,0,0,0);
-		if (textView != NULL) {
-			window->AddChild(textView);
-		}
-	} else {
-		if (textView->LockLooper()) {
-			textView->SetText(statusString.get());
-			textView->UnlockLooper();
-		}
-	}
-	return NS_OK;
+  if (!bitmap) return NS_OK;
+  nsCAutoString statusString;
+  statusString.AssignWithConversion(someData);
+  if (textView == NULL) {
+    BRect textRect = bitmap->Bounds();
+    textView = new BStringView(textRect,
+                               "splash text",
+                               statusString.get(), 
+                               B_FOLLOW_LEFT | B_FOLLOW_V_CENTER);
+    if (textView) {
+      // Reduce the view size, and take into account the image frame
+      textRect.bottom -= 10;
+      textRect.left += 10;
+      textRect.right -= 10; 
+      textRect.top = textRect.bottom - 20;
+
+      textView->SetViewColor(B_TRANSPARENT_COLOR);
+      textView->SetHighColor(255,255,255,0);
+      textView->SetLowColor(0,0,0,0);
+      window->AddChild(textView);
+    }
+  } else {
+    if (textView->LockLooper()) {
+      textView->SetText(statusString.get());
+      textView->UnlockLooper();
+    }
+  }
+  return NS_OK;
 }
 
 nsresult