vclptr: add isDisposed method - and assert for it here & there.

Change-Id: I2b154e0ed9eee0a45900ada7f805a1d444a31bc0

include/vcl/outdev.hxx

@@ -390,6 +390,7 @@ protected:
 public:
     /// call the dispose() method if we have not already been disposed.
     void                                disposeOnce();
+    bool                                isDisposed() const { return mbDisposed; }
 
 public:
 

sw/source/core/doc/DocumentDeviceManager.cxx

@@ -65,6 +65,7 @@ SfxPrinter* DocumentDeviceManager::getPrinter(/*[in]*/ bool bCreate ) const
 
 void DocumentDeviceManager::setPrinter(/*[in]*/ SfxPrinter *pP,/*[in]*/ bool bDeleteOld,/*[in]*/ bool bCallPrtDataChanged )
 {
+    assert ( !pP->isDisposed() );
     if ( pP != mpPrt )
     {
         if ( bDeleteOld )
@@ -100,11 +101,15 @@ VirtualDevice* DocumentDeviceManager::getVirtualDevice(/*[in]*/ bool bCreate ) c
     else
         pRet = &CreateVirtualDevice_();
 
+    assert ( !pRet->isDisposed() );
+
     return pRet;
 }
 
 void DocumentDeviceManager::setVirtualDevice(/*[in]*/ VirtualDevice* pVd,/*[in]*/ bool bDeleteOld, /*[in]*/ bool )
 {
+    assert ( !pVd->isDisposed() );
+
     if ( mpVirDev.get() != pVd )
     {
         if ( bDeleteOld )
@@ -133,6 +138,8 @@ OutputDevice* DocumentDeviceManager::getReferenceDevice(/*[in]*/ bool bCreate )
         pRet = getVirtualDevice( bCreate );
     }
 
+    assert ( !pRet->isDisposed() );
+
     return pRet;
 }
 

sw/source/uibase/uno/SwXDocumentSettings.cxx

@@ -389,6 +389,7 @@ void SwXDocumentSettings::_setSingleValue( const comphelper::PropertyInfo & rInf
                     if ( OUString ( pPrinter->GetName()) != sPrinterName )
                     {
                         VclPtr<SfxPrinter> pNewPrinter = new SfxPrinter ( pPrinter->GetOptions().Clone(), sPrinterName );
+                        assert (! pNewPrinter->isDisposed() );
                         if( pNewPrinter->IsKnown() )
                         {
                             // set printer only once; in _postSetValues
@@ -426,7 +427,7 @@ void SwXDocumentSettings::_setSingleValue( const comphelper::PropertyInfo & rInf
                     };
                     SfxItemSet *pItemSet = new SfxItemSet( mpDoc->GetAttrPool(), nRange );
                     VclPtr<SfxPrinter> pPrinter = SfxPrinter::Create ( aStream, pItemSet );
-
+                    assert (! pPrinter->isDisposed() );
                     // set printer only once; in _postSetValues
                     mpPrinter.disposeAndClear();
                     mpPrinter = pPrinter;

vcl/README.lifecycle

@@ -144,11 +144,13 @@ or:
 	  their constructors.
 
 	* Pass 'const VclPtr<> &' instead of pointers everywhere
+		+ add 'explicit' keywords to VclPtr constructors to
+		  accelerate compilation etc.
 
 	* Cleanup common existing methods such that they continue to
 	  work post-dispose.
 
-	* Dispose functions shoudl be audited to:
+	* Dispose functions should be audited to:
 		+ not leave dangling pointsr
 		+ shrink them - some work should incrementally
 		  migrate back to destructors.

vcl/source/outdev/font.cxx

@@ -91,7 +91,12 @@ vcl::FontInfo OutputDevice::GetDevFont( int nDevFontIndex ) const
 int OutputDevice::GetDevFontCount() const
 {
     if( !mpGetDevFontList )
+    {
+        if (!mpFontCollection)
+            return 0;
+
         mpGetDevFontList = mpFontCollection->GetDevFontList();
+    }
     return mpGetDevFontList->Count();
 }