remove unused variables and store the clipregion in an nsCOMPtr

gfx/src/gtk/nsGraphicsStateGTK.cpp

@@ -34,7 +34,6 @@ nsGraphicsState::nsGraphicsState()
 //////////////////////////////////////////////////////////////////////////
 nsGraphicsState::~nsGraphicsState()
 {
-  NS_IF_RELEASE(mClipRegion);
   NS_IF_RELEASE(mFontMetrics);
 }
 //////////////////////////////////////////////////////////////////////////

gfx/src/gtk/nsGraphicsStateGTK.h

@@ -27,13 +27,14 @@
 #include "nsIFontMetrics.h"
 #include "nsTransform2D.h"
 #include "nsRegionGTK.h"
+#include "nsCOMPtr.h"
 
 class nsGraphicsState
 {
 public:
 
   nsTransform2D  *mMatrix;
-  nsIRegion      *mClipRegion;
+  nsCOMPtr<nsIRegion> mClipRegion;
   nscolor         mColor;
   nsLineStyle     mLineStyle;
   nsIFontMetrics *mFontMetrics;

gfx/src/gtk/nsRenderingContextGTK.cpp

@@ -65,9 +65,6 @@ nsRenderingContextGTK::nsRenderingContextGTK()
   mGC = nsnull;
 
   mFunction = GDK_COPY;
-  mClipIsSet = PR_TRUE;
-  mFontIsSet = PR_TRUE;
-  mColorIsSet = PR_TRUE;
 
   PushState();
 }
@@ -91,7 +88,6 @@ nsRenderingContextGTK::~nsRenderingContextGTK()
 
   if (mTMatrix)
     delete mTMatrix;
-  NS_IF_RELEASE(mClipRegion);
   NS_IF_RELEASE(mOffscreenSurface);
   NS_IF_RELEASE(mFontMetrics);
   NS_IF_RELEASE(mContext);
@@ -279,7 +275,7 @@ NS_IMETHODIMP nsRenderingContextGTK::PushState(PRInt32 aFlags)
   if (aFlags & NS_STATE_CLIP) {
     if (mClipRegion) {
       // set the state's clip region to a new copy of the current clip region
-      GetClipRegion(&state->mClipRegion);
+      GetClipRegion(getter_AddRefs(state->mClipRegion));
     }
   }
 
@@ -314,7 +310,7 @@ NS_IMETHODIMP nsRenderingContextGTK::PushState(void)
   if (mClipRegion)
   {
     // set the state's clip region to a new copy of the current clip region
-    GetClipRegion(&state->mClipRegion);
+    GetClipRegion(getter_AddRefs(state->mClipRegion));
   }
 
   NS_IF_ADDREF(mFontMetrics);
@@ -344,11 +340,7 @@ NS_IMETHODIMP nsRenderingContextGTK::PopState(PRBool &aClipEmpty)
       mTMatrix = state->mMatrix;
     }
 
-    // state->mClipRegion might be null, but thats ok.  we want that.
-    NS_IF_RELEASE(mClipRegion);
-
     mClipRegion = state->mClipRegion;
-    mClipIsSet = PR_FALSE;
 
     if (state->mFontMetrics && (mFontMetrics != state->mFontMetrics))
       SetFont(state->mFontMetrics);
@@ -454,8 +446,6 @@ NS_IMETHODIMP nsRenderingContextGTK::SetClipRect(const nsRect& aRect,
          nsClipCombine_to_string(aCombine));
 #endif // TRACE_SET_CLIP
 
-  mClipIsSet = PR_FALSE;
-
   mTMatrix->TransformCoord(&trect.x, &trect.y,
                            &trect.width, &trect.height);
 
@@ -493,7 +483,6 @@ void nsRenderingContextGTK::UpdateGC()
   if (mGC)
     gdk_gc_unref(mGC);
 
-
   memset(&values, 0, sizeof(GdkGCValues));
 
   values.font = mCurrentFont;
@@ -528,8 +517,6 @@ NS_IMETHODIMP nsRenderingContextGTK::SetClipRegion(const nsIRegion& aRegion,
 {
   CreateClipRegion();
 
-  mClipIsSet = PR_FALSE;
-
   switch(aCombine)
   {
     case nsClipCombine_kIntersect:
@@ -559,7 +546,7 @@ NS_IMETHODIMP nsRenderingContextGTK::CopyClipRegion(nsIRegion &aRegion)
   if (!mClipRegion)
     return NS_ERROR_FAILURE;
 
-  aRegion.SetTo(*NS_STATIC_CAST(nsIRegion*, mClipRegion));
+  aRegion.SetTo(*mClipRegion);
   return NS_OK;
 }
 
@@ -570,26 +557,22 @@ NS_IMETHODIMP nsRenderingContextGTK::GetClipRegion(nsIRegion **aRegion)
   if (!aRegion || !mClipRegion)
     return NS_ERROR_NULL_POINTER;
 
+  if (mClipRegion) {
     if (*aRegion) { // copy it, they should be using CopyClipRegion 
-    // printf("you should be calling CopyClipRegion()\n");
       (*aRegion)->SetTo(*mClipRegion);
       rv = NS_OK;
     } else {
-    if ( NS_SUCCEEDED(nsComponentManager::CreateInstance(kRegionCID, 0, NS_GET_IID(nsIRegion), 
-                                                         (void**)aRegion )) )
-    {
-      if (mClipRegion) {
-        (*aRegion)->Init();
-        (*aRegion)->SetTo(*mClipRegion);
-        NS_ADDREF(*aRegion);
-        rv = NS_OK;
+      nsCOMPtr<nsIRegion> newRegion = do_CreateInstance(kRegionCID, &rv);
+      if (NS_SUCCEEDED(rv)) {
+        newRegion->Init();
+        newRegion->SetTo(*mClipRegion);
+        NS_ADDREF(*aRegion = newRegion);
+      }
+    }
   } else {
     printf("null clip region, can't make a valid copy\n");
-        NS_RELEASE(*aRegion);
     rv = NS_ERROR_FAILURE;
   }
-    } 
-  }
 
   return rv;
 }
@@ -599,14 +582,8 @@ NS_IMETHODIMP nsRenderingContextGTK::SetColor(nscolor aColor)
   if (nsnull == mContext)  
     return NS_ERROR_FAILURE;
 
-  // return if the colors are the same so that mColorIsSet doesn't get changed and we don't update the GC again
-  if (mCurrentColor == aColor)
-    return NS_OK;
-
   mCurrentColor = aColor;
 
-  mColorIsSet = PR_FALSE;
-  
   return NS_OK;
 }
 
@@ -637,7 +614,6 @@ NS_IMETHODIMP nsRenderingContextGTK::SetFont(nsIFontMetrics *aFontMetrics)
     nsFontHandle  fontHandle;
     mFontMetrics->GetFontHandle(fontHandle);
     mCurrentFont = (GdkFont *)fontHandle;
-    mFontIsSet = PR_FALSE;
   }
 
   return NS_OK;

gfx/src/gtk/nsRenderingContextGTK.h

@@ -185,16 +185,18 @@ public:
 
   void CreateClipRegion() {
     static NS_DEFINE_CID(kRegionCID, NS_REGION_CID);
-    if (!mClipRegion) {
+    if (mClipRegion)
+      return;
+
     PRUint32 w, h;
     mSurface->GetSize(&w, &h);
     
-      if ( NS_SUCCEEDED(nsComponentManager::CreateInstance(kRegionCID, 0, NS_GET_IID(nsIRegion), (void**)&mClipRegion)) ) {
+    mClipRegion = do_CreateInstance(kRegionCID);
+    if (mClipRegion) {
       mClipRegion->Init();
       mClipRegion->SetTo(0,0,w,h);
     }
   }
-  }
 
   GdkGC *GetGC() { return mGC; }
 
@@ -203,14 +205,11 @@ private:
   nsDrawingSurfaceGTK   *mSurface;
   nsIDeviceContext      *mContext;
   nsIFontMetrics        *mFontMetrics;
-  nsIRegion             *mClipRegion;
+  nsCOMPtr<nsIRegion>    mClipRegion;
   nsTransform2D         *mTMatrix;
   float                  mP2T;
   GdkWChar*              mDrawStringBuf;
   PRUint32               mDrawStringSize;
-  PRBool                 mClipIsSet;
-  PRBool                 mFontIsSet;
-  PRBool                 mColorIsSet;
 
  // graphic state stack (GraphicsState)
   nsVoidArray           *mStateCache;