starmath: SmVerticalBraceNode always has a triple of nodes

Moreover the middle ("Brace") node is a SmMathSymbolNode.

Change-Id: Ia0e4f798b69a9a205269bbd3f6c63d2059e8c766
Reviewed-on: https://gerrit.libreoffice.org/27769Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Takeshi Abe <tabe@fixedpoint.jp>

starmath/inc/node.hxx

@@ -1369,7 +1369,7 @@ inline const SmMathSymbolNode* SmBraceNode::ClosingBrace() const
 
 inline SmNode* SmVerticalBraceNode::Body()
 {
-    OSL_ASSERT( GetNumSubNodes() > 0 );
+    assert( GetNumSubNodes() == 3 );
     return GetSubNode( 0 );
 }
 inline const SmNode* SmVerticalBraceNode::Body() const
@@ -1378,7 +1378,8 @@ inline const SmNode* SmVerticalBraceNode::Body() const
 }
 inline SmMathSymbolNode* SmVerticalBraceNode::Brace()
 {
-    OSL_ASSERT( GetNumSubNodes() > 1 && GetSubNode( 1 )->GetType() == NMATH );
+    assert( GetNumSubNodes() == 3 );
+    assert( GetSubNode( 1 )->GetType() == NMATH );
     return static_cast< SmMathSymbolNode* >( GetSubNode( 1 ));
 }
 inline const SmMathSymbolNode* SmVerticalBraceNode::Brace() const
@@ -1387,7 +1388,7 @@ inline const SmMathSymbolNode* SmVerticalBraceNode::Brace() const
 }
 inline SmNode* SmVerticalBraceNode::Script()
 {
-    OSL_ASSERT( GetNumSubNodes() > 2 );
+    assert( GetNumSubNodes() == 3 );
     return GetSubNode( 2 );
 }
 inline const SmNode* SmVerticalBraceNode::Script() const

starmath/source/mathmlexport.cxx

@@ -1391,7 +1391,7 @@ void SmXMLExport::ExportFont(const SmNode *pNode, int nLevel)
 }
 
 
-void SmXMLExport::ExportVerticalBrace(const SmNode *pNode, int nLevel)
+void SmXMLExport::ExportVerticalBrace(const SmVerticalBraceNode *pNode, int nLevel)
 {
     // "[body] overbrace [script]"
 
@@ -1417,18 +1417,17 @@ void SmXMLExport::ExportVerticalBrace(const SmNode *pNode, int nLevel)
             break;
     }
 
-    OSL_ENSURE(pNode->GetNumSubNodes()==3,"Bad Vertical Brace");
     SvXMLElementExport aOver1(*this, XML_NAMESPACE_MATH,which, true, true);
     {//Scoping
         // using accents will draw the over-/underbraces too close to the base
         // see http://www.w3.org/TR/MathML2/chapter3.html#id.3.4.5.2
         // also XML_ACCENT is illegal with XML_MUNDER. Thus no XML_ACCENT attribute here!
         SvXMLElementExport aOver2(*this, XML_NAMESPACE_MATH,which, true, true);
-        ExportNodes(pNode->GetSubNode(0), nLevel);
+        ExportNodes(pNode->Body(), nLevel);
         AddAttribute(XML_NAMESPACE_MATH, XML_STRETCHY, XML_TRUE);
-        ExportNodes(pNode->GetSubNode(1), nLevel);
+        ExportNodes(pNode->Brace(), nLevel);
     }
-    ExportNodes(pNode->GetSubNode(2), nLevel);
+    ExportNodes(pNode->Script(), nLevel);
 }
 
 void SmXMLExport::ExportMatrix(const SmNode *pNode, int nLevel)
@@ -1554,7 +1553,7 @@ void SmXMLExport::ExportNodes(const SmNode *pNode, int nLevel)
             ExportFont(pNode, nLevel);
             break;
         case NVERTICAL_BRACE:
-            ExportVerticalBrace(pNode, nLevel);
+            ExportVerticalBrace(static_cast<const SmVerticalBraceNode *>(pNode), nLevel);
             break;
         case NMATRIX:
             ExportMatrix(pNode, nLevel);

starmath/source/mathmlexport.hxx

@@ -89,7 +89,7 @@ protected:
     void ExportOperator(const SmNode *pNode, int nLevel);
     void ExportAttributes(const SmNode *pNode, int nLevel);
     void ExportFont(const SmNode *pNode, int nLevel);
-    void ExportVerticalBrace(const SmNode *pNode, int nLevel);
+    void ExportVerticalBrace(const SmVerticalBraceNode *pNode, int nLevel);
     void ExportMatrix(const SmNode *pNode, int nLevel);
     void ExportBlank(const SmNode *pNode, int nLevel);
 

starmath/source/node.cxx

@@ -1555,9 +1555,9 @@ void SmBracebodyNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
 
 void SmVerticalBraceNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
 {
-    SmNode *pBody   = GetSubNode(0),
-           *pBrace  = GetSubNode(1),
-           *pScript = GetSubNode(2);
+    SmNode *pBody   = Body(),
+           *pBrace  = Brace(),
+           *pScript = Script();
     assert(pBody);
     assert(pBrace);
     assert(pScript);

starmath/source/visitors.cxx

@@ -1181,8 +1181,8 @@ void SmCaretPosGraphBuildingVisitor::Visit( SmBinVerNode* pNode )
  */
 void SmCaretPosGraphBuildingVisitor::Visit( SmVerticalBraceNode* pNode )
 {
-    SmNode  *pBody   = pNode->GetSubNode( 0 ),
-            *pScript = pNode->GetSubNode( 2 );
+    SmNode  *pBody   = pNode->Body(),
+            *pScript = pNode->Script();
     //None of these children can be NULL
 
     SmCaretPosGraphEntry  *left,
@@ -2396,8 +2396,8 @@ void SmNodeToTextVisitor::Visit( SmRectangleNode* )
 
 void SmNodeToTextVisitor::Visit( SmVerticalBraceNode* pNode )
 {
-    SmNode *pBody   = pNode->GetSubNode( 0 ),
-           *pScript = pNode->GetSubNode( 2 );
+    SmNode *pBody   = pNode->Body(),
+           *pScript = pNode->Script();
     LineToText( pBody );
     Append( pNode->GetToken( ).aText );
     LineToText( pScript );