don't compare invalid iterators/node pointers

[wxWidgets.git] / src / os2 / region.cpp

diff --git a/src/os2/region.cpp b/src/os2/region.cpp
index 733998bbf754a61b0bc162efdd27558a64c95020..039534285ef9c0f49a848591f6df0b4ff355deea 100644 (file)
--- a/src/os2/region.cpp
+++ b/src/os2/region.cpp
@@ -39,6 +39,7 @@ public:
         RGNRECT                     vRgnData;
         PRECTL                      pRect = NULL;
 
+        vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
         if (::GpiQueryRegionRects( rData.m_hPS      // Pres space
                                   ,rData.m_hRegion  // Handle of region to query
                                   ,NULL             // Return all RECTs
@@ -76,6 +77,7 @@ public:
 };
 
 #define M_REGION (((wxRegionRefData*)m_refData)->m_hRegion)
+#define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_hRegion)
 
 //-----------------------------------------------------------------------------
 // wxRegion
@@ -220,10 +222,44 @@ wxRegion::~wxRegion()
 {
 } // end of wxRegion::~wxRegion
 
+wxObjectRefData *wxRegion::CreateData() const
+{
+    return new wxRegionRefData;
+}
+
+wxObjectRefData *wxRegion::CloneData(const wxObjectRefData *data) const
+{
+    return new wxRegionRefData(*(wxRegionRefData *)data);
+}
+
 //-----------------------------------------------------------------------------
 //# Modify region
 //-----------------------------------------------------------------------------
 
+bool wxRegion::Offset(
+  wxCoord                           x
+, wxCoord                           y
+)
+{
+    if ( !x && !y )
+    {
+        // nothing to do
+        return TRUE;
+    }
+
+    AllocExclusive();
+
+#if 0
+    if ( ::OffsetRgn(GetHrgn(), x, y) == ERROR )
+    {
+        wxLogLastError(_T("OffsetRgn"));
+
+        return FALSE;
+    }
+#endif
+    return TRUE;
+}
+
 //
 // Clear current region
 //
@@ -243,71 +279,7 @@ bool wxRegion::Combine(
 , wxRegionOp                        eOp
 )
 {
-    //
-    // Don't change shared data
-    //
-    if (!m_refData)
-    {
-        m_refData = new wxRegionRefData();
-    }
-    else if (m_refData->GetRefCount() > 1)
-    {
-        wxRegionRefData*            pRef = (wxRegionRefData*)m_refData;
-
-        UnRef();
-        m_refData = new wxRegionRefData(*pRef);
-    }
-
-    //
-    // If ref count is 1, that means it's 'ours' anyway so no action.
-    //
-    RECTL                           vRect;
-
-    vRect.xLeft   = x;
-    vRect.xRight  = x + vWidth;
-    vRect.yBottom = y;
-    vRect.yTop    = y + vHeight;
-
-    HRGN                            hRgn = ::GpiCreateRegion( ((wxRegionRefData*)m_refData)->m_hPS
-                                                             ,1
-                                                             ,&vRect
-                                                            );
-    LONG                            lMode = 0L;
-
-    switch (eOp)
-    {
-        case wxRGN_AND:
-            lMode = CRGN_AND;
-            break;
-
-        case wxRGN_OR:
-            lMode = CRGN_OR;
-            break;
-
-        case wxRGN_XOR:
-            lMode = CRGN_XOR;
-            break;
-
-        case wxRGN_DIFF:
-            lMode = CRGN_DIFF;
-            break;
-
-        case wxRGN_COPY:
-        default:
-            lMode = CRGN_COPY;
-            break;
-    }
-    bool                            bSuccess = ::GpiCombineRegion( ((wxRegionRefData*)m_refData)->m_hPS
-                                                                  ,M_REGION
-                                                                  ,M_REGION
-                                                                  ,hRgn
-                                                                  ,lMode
-                                                                 );
-    ::GpiDestroyRegion ( ((wxRegionRefData*)m_refData)->m_hPS
-                        ,hRgn
-                       );
-
-    return bSuccess;
+    return Combine(wxRegion(x, y, vWidth, vHeight), eOp);
 } // end of wxRegion::Combine
 
 //
@@ -318,55 +290,67 @@ bool wxRegion::Combine(
 , wxRegionOp                        eOp
 )
 {
-    if (rRegion.Empty())
-        return FALSE;
-
     //
-    // Don't change shared data
+    // We can't use the API functions if we don't have a valid region handle
     //
     if (!m_refData)
     {
-        m_refData = new wxRegionRefData();
+        // combining with an empty/invalid region works differently depending
+        // on the operation
+        switch (eOp)
+        {
+            case wxRGN_COPY:
+            case wxRGN_OR:
+            case wxRGN_XOR:
+                *this = rRegion;
+                break;
+
+            default:
+                wxFAIL_MSG( _T("unknown region operation") );
+                // fall through
+
+            case wxRGN_AND:
+            case wxRGN_DIFF:
+                // leave empty/invalid
+                return FALSE;
+        }
     }
-    else  if (m_refData->GetRefCount() > 1)
+    else // we have a valid region
     {
-        wxRegionRefData*            pRef = (wxRegionRefData*)m_refData;
 
-        UnRef();
-        m_refData = new wxRegionRefData(*pRef);
-    }
+        LONG                        lMode = 0;
 
-    LONG                            lMode = 0;
-
-    switch (eOp)
-    {
-        case wxRGN_AND:
-            lMode = CRGN_AND;
-            break;
-
-        case wxRGN_OR:
-            lMode = CRGN_OR;
-            break;
-
-        case wxRGN_XOR:
-            lMode = CRGN_XOR;
-            break;
-
-        case wxRGN_DIFF:
-            lMode = CRGN_DIFF;
-            break;
-
-        case wxRGN_COPY:
-        default:
-            lMode = CRGN_COPY;
-            break;
+        switch (eOp)
+        {
+            case wxRGN_AND:
+                lMode = CRGN_AND;
+                break;
+
+            case wxRGN_OR:
+                lMode = CRGN_OR;
+                break;
+
+            case wxRGN_XOR:
+                lMode = CRGN_XOR;
+                break;
+
+            case wxRGN_DIFF:
+                lMode = CRGN_DIFF;
+                break;
+
+            case wxRGN_COPY:
+            default:
+                lMode = CRGN_COPY;
+                break;
+        }
+        return (::GpiCombineRegion( ((wxRegionRefData*)rRegion.m_refData)->m_hPS
+                                   ,M_REGION
+                                   ,M_REGION
+                                   ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion
+                                   ,lMode
+                                  ) != RGN_ERROR);
     }
-    return (::GpiCombineRegion( ((wxRegionRefData*)rRegion.m_refData)->m_hPS
-                               ,M_REGION
-                               ,M_REGION
-                               ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion
-                               ,lMode
-                              ) != RGN_ERROR);
+    return TRUE;
 } // end of wxRegion::Combine
 
 bool wxRegion::Combine(
@@ -406,7 +390,7 @@ void wxRegion::GetBox(
                             ,&vRect
                            );
         x       = vRect.xLeft;
-        y       = vRect.yTop;
+        y       = vRect.yBottom;
         vWidth  = vRect.xRight - vRect.xLeft;
         vHeight = vRect.yTop - vRect.yBottom;
     }
@@ -455,7 +439,6 @@ wxRegionContain wxRegion::Contains(
 , wxCoord                           y
 ) const
 {
-    bool                            bOK = FALSE;
     POINTL                          vPoint;
 
     vPoint.x = x;
@@ -571,6 +554,7 @@ void wxRegion::SetPS(
     RGNRECT                     vRgnData;
     PRECTL                      pRect = NULL;
 
+    vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
     if (::GpiQueryRegionRects( ((wxRegionRefData*)m_refData)->m_hPS
                               ,((wxRegionRefData*)m_refData)->m_hRegion
                               ,NULL
@@ -646,6 +630,7 @@ void wxRegionIterator::Reset(
 )
 {
     m_lCurrent = 0;
+    m_lNumRects = 0;
     m_vRegion  = rRegion;
 
     if (m_pRects)
@@ -660,6 +645,7 @@ void wxRegionIterator::Reset(
         RGNRECT                     vRgnData;
         PRECTL                      pRect;
 
+        vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
         if (::GpiQueryRegionRects( ((wxRegionRefData*)rRegion.m_refData)->m_hPS     // Pres space
                                   ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion // Handle of region to query
                                   ,NULL                                             // Return all RECTs
@@ -679,10 +665,12 @@ void wxRegionIterator::Reset(
                                       ,pRect                                            // Will contain the actual RECTS
                                      ))
             {
+#if 0
                 M_REGION = ::GpiCreateRegion( ((wxRegionRefData*)rRegion.m_refData)->m_hPS
                                              ,vRgnData.crcReturned
                                              ,pRect
                                             );
+#endif
                 for( LONG i = 0; i < m_lNumRects; i++)
                 {
                     m_pRects[i].x      = pRect[i].xLeft;
@@ -690,7 +678,9 @@ void wxRegionIterator::Reset(
                     m_pRects[i].y      = pRect[i].yBottom;
                     m_pRects[i].height = pRect[i].yTop - pRect[i].yBottom;
                 }
+#if 0
                 ((wxRegionRefData*)m_refData)->m_hPS = ((wxRegionRefData*)rRegion.m_refData)->m_hPS;
+#endif
             }
         }
     }