starmath: Make SmNode abstract and noncopyable

... and remove unused SmStructureNode's copy ctor/assignment operator.
This seems desirable according to the old comment in SmNode::Accept().

Change-Id: Ifb51c64ca784f1295374d31cc210cbe3e45aa2f8
Reviewed-on: https://gerrit.libreoffice.org/22801
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Takeshi Abe <tabe@fixedpoint.jp>

2 files changed, 5 insertions, 60 deletions

diff --git a/starmath/inc/node.hxx b/starmath/inc/node.hxx
index b4e5b1db317a..4e38e4374be8 100644
--- a/starmath/inc/node.hxx
+++ b/starmath/inc/node.hxx
@@ -106,6 +106,9 @@ protected:
     sal_Int32       mnAccIndex;
 
 public:
+    SmNode(const SmNode&) = delete;
+    SmNode& operator=(const SmNode&) = delete;
+
     virtual             ~SmNode();
 
     virtual bool        IsVisible() const;
@@ -156,7 +159,7 @@ public:
     virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat);
     virtual void CreateTextFromNode(OUString &rText);
 
-    virtual void    GetAccessibleText( OUStringBuffer &rText ) const;
+    virtual void    GetAccessibleText( OUStringBuffer &rText ) const = 0;
     sal_Int32       GetAccessibleIndex() const { return mnAccIndex; }
     const SmNode *  FindNodeWithAccessibleIndex(sal_Int32 nAccIndex) const;
 
@@ -180,7 +183,7 @@ public:
     /** Accept a visitor
      * Calls the method for this class on the visitor
      */
-    virtual void Accept(SmVisitor* pVisitor);
+    virtual void Accept(SmVisitor* pVisitor) = 0;
 
     /** True if this node is selected */
     bool IsSelected() const {return mbIsSelected;}
@@ -288,7 +291,6 @@ protected:
     {}
 
 public:
-            SmStructureNode( const SmStructureNode &rNode );
     virtual ~SmStructureNode();
 
     virtual bool        IsVisible() const override;
@@ -301,8 +303,6 @@ public:
             void SetSubNodes(SmNode *pFirst, SmNode *pSecond, SmNode *pThird = nullptr);
             void SetSubNodes(const SmNodeArray &rNodeArray);
 
-    SmStructureNode & operator = ( const SmStructureNode &rNode );
-
     virtual void  GetAccessibleText( OUStringBuffer &rText ) const override;
 
     void SetSubNode(size_t nIndex, SmNode* pNode)
diff --git a/starmath/source/node.cxx b/starmath/source/node.cxx
index 6a9c07d6889b..8dadb752dde6 100644
--- a/starmath/source/node.cxx
+++ b/starmath/source/node.cxx
@@ -378,11 +378,6 @@ const SmNode * SmNode::FindRectClosestTo(const Point &rPoint) const
     return pResult;
 }
 
-void SmNode::GetAccessibleText( OUStringBuffer &/*rText*/ ) const
-{
-    SAL_WARN("starmath", "SmNode: GetAccessibleText not overridden");
-}
-
 const SmNode * SmNode::FindNodeWithAccessibleIndex(sal_Int32 nAccIdx) const
 {
     const SmNode *pResult = nullptr;
@@ -420,54 +415,12 @@ long SmNode::GetFormulaBaseline() const
 }
 
 
-SmStructureNode::SmStructureNode( const SmStructureNode &rNode ) :
-    SmNode( rNode.GetType(), rNode.GetToken() )
-{
-    size_t i;
-    for (i = 0;  i < aSubNodes.size();  i++)
-        delete aSubNodes[i];
-    aSubNodes.resize(0);
-
-    auto nSize = rNode.aSubNodes.size();
-    aSubNodes.resize( nSize );
-    for (i = 0;  i < nSize;  ++i)
-    {
-        SmNode *pNode = rNode.aSubNodes[i];
-        aSubNodes[i] = pNode ? new SmNode( *pNode ) : nullptr;
-    }
-    ClaimPaternity();
-}
-
-
 SmStructureNode::~SmStructureNode()
 {
     ForEachNonNull(this, boost::checked_deleter<SmNode>());
 }
 
 
-SmStructureNode & SmStructureNode::operator = ( const SmStructureNode &rNode )
-{
-    SmNode::operator = ( rNode );
-
-    size_t i;
-    for (i = 0;  i < aSubNodes.size();  i++)
-        delete aSubNodes[i];
-    aSubNodes.resize(0);
-
-    auto nSize = rNode.aSubNodes.size();
-    aSubNodes.resize( nSize );
-    for (i = 0;  i < nSize;  ++i)
-    {
-        SmNode *pNode = rNode.aSubNodes[i];
-        aSubNodes[i] = pNode ? new SmNode( *pNode ) : nullptr;
-    }
-
-    ClaimPaternity();
-
-    return *this;
-}
-
-
 void SmStructureNode::SetSubNodes(SmNode *pFirst, SmNode *pSecond, SmNode *pThird)
 {
     size_t nSize = pThird ? 3 : (pSecond ? 2 : (pFirst ? 1 : 0));
@@ -2929,14 +2882,6 @@ void SmBlankNode::Arrange(OutputDevice &rDev, const SmFormat &rFormat)
 /**************************************************************************/
 //Implementation of all accept methods for SmVisitor
 
-void SmNode::Accept(SmVisitor*){
-    //This method is only implemented to avoid making SmNode abstract because an
-    //obscure copy constructor is used... I can't find it's implementation, and
-    //don't want to figure out how to fix it... If you want to, just delete this
-    //method, making SmNode abstract, and see where you can an problem with that.
-    SAL_WARN("starmath", "SmNode should not be visitable!");
-}
-
 void SmTableNode::Accept(SmVisitor* pVisitor) {
     pVisitor->Visit(this);
 }