they are constant methods, so let them be 'const'

svn path=/trunk/playground/graphics/okular/; revision=641248

core/document.cpp

@@ -865,7 +865,7 @@ bool Document::openDocument( const QString & docFile, const KUrl& url, const KMi
 }
 
 
-QString Document::xmlFile()
+QString Document::xmlFile() const
 {
     if ( d->m_generator )
     {

core/document.h

@@ -261,7 +261,7 @@ class OKULAR_EXPORT Document : public QObject
          * Returns the gui description file of the document that shall be merged with
          * Okulars menu/tool bar.
          */
-        QString xmlFile();
+        QString xmlFile() const;
 
         /**
          * Calling this method allows the document to add custom actions to the gui

core/page.cpp

@@ -699,7 +699,7 @@ void Page::restoreLocalContents( const QDomNode & pageNode )
     }
 }
 
-void Page::saveLocalContents( QDomNode & parentNode, QDomDocument & document )
+void Page::saveLocalContents( QDomNode & parentNode, QDomDocument & document ) const
 {
     // only add a node if there is some stuff to write into
     if ( m_annotations.isEmpty() )

core/page.h

@@ -343,7 +343,7 @@ class OKULAR_EXPORT Page : public QObject
         /**
          * Saves the local contents (e.g. annotations) of the page.
          */
-        void saveLocalContents( QDomNode & parentNode, QDomDocument & document );
+        void saveLocalContents( QDomNode & parentNode, QDomDocument & document ) const;
 
     Q_SIGNALS:
         void rotationFinished( int page );