LOK: Add getPartName.

By default (i.e. for writer) we can just return an empty string,
and we only actually need to implement ITiledRenderable's
getPartName for components that actually support it (i.e. calc/impress).

Change-Id: I8b381e5d7a8000638b02f763b4bea8ef0226f8e0

desktop/source/lib/init.cxx

@@ -184,6 +184,7 @@ static LibreOfficeKitDocumentType doc_getDocumentType(LibreOfficeKitDocument* pT
 static int doc_getParts(LibreOfficeKitDocument* pThis);
 static int doc_getPart(LibreOfficeKitDocument* pThis);
 static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart);
+static char* doc_getPartName(LibreOfficeKitDocument* pThis, int nPart);
 void        doc_paintTile(LibreOfficeKitDocument* pThis,
                           unsigned char* pBuffer,
                           const int nCanvasWidth, const int nCanvasHeight,
@@ -214,6 +215,7 @@ struct LibLODocument_Impl : public _LibreOfficeKitDocument
             m_pDocumentClass->getParts = doc_getParts;
             m_pDocumentClass->getPart = doc_getPart;
             m_pDocumentClass->setPart = doc_setPart;
+            m_pDocumentClass->getPartName = doc_getPartName;
             m_pDocumentClass->paintTile = doc_paintTile;
             m_pDocumentClass->getDocumentSize = doc_getDocumentSize;
 
@@ -469,6 +471,25 @@ static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart)
     Application::ReleaseSolarMutex();
 }
 
+static char* doc_getPartName(LibreOfficeKitDocument* pThis, int nPart)
+{
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    ::vcl::ITiledRenderable* pDoc = dynamic_cast< ::vcl::ITiledRenderable* >( pDocument->mxComponent.get() );
+    if (!pDoc)
+    {
+        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
+        return 0;
+    }
+
+    OUString sName = pDoc->getPartName( nPart );
+    OString aString = OUStringToOString(sName, RTL_TEXTENCODING_UTF8);
+    char* pMemory = (char*) malloc(aString.getLength() + 1);
+    strcpy(pMemory, aString.getStr());
+    return pMemory;
+
+}
+
 void doc_paintTile (LibreOfficeKitDocument* pThis,
                     unsigned char* pBuffer,
                     const int nCanvasWidth, const int nCanvasHeight,

include/LibreOfficeKit/LibreOfficeKit.h

@@ -83,6 +83,9 @@ struct _LibreOfficeKitDocumentClass
   void (*setPart)         (LibreOfficeKitDocument* pThis,
                            int nPart);
 
+  char* (*getPartName)    (LibreOfficeKitDocument* pThis,
+                           int nPart);
+
   // Get a pointer to a raw array, of size 3*nCanvasWidth*nCanvasHeight
   // Basebmp's bitmap device seems to round the width up if needed
   // for its internal buffer, i.e. the rowstride for the buffer may be larger

include/LibreOfficeKit/LibreOfficeKit.hxx

@@ -64,6 +64,11 @@ public:
         mpDoc->pClass->setPart(mpDoc, nPart);
     }
 
+    inline char* getPartName(int nPart)
+    {
+        return mpDoc->pClass->getPartName(mpDoc, nPart);
+    }
+
     inline void paintTile(
                           unsigned char* pBuffer,
                           const int nCanvasWidth,

include/vcl/ITiledRenderable.hxx

@@ -57,6 +57,16 @@ public:
      * details.
      */
     virtual int getPart() = 0;
+
+    /**
+     * Get the name of the currently displayed part, i.e. sheet in a spreadsheet
+     * or slide in a presentation.
+     */
+    virtual OUString getPartName(int nPart)
+    {
+        (void) nPart;
+        return "";
+    }
 };
 
 } // namespace vcl