add convenience functions to handle dirs

Change-Id: I81c94565e09e0d839d95bf4f09b029838bb37ad5

include/writerperfect/DirectoryStream.hxx

@@ -31,6 +31,9 @@ public:
     explicit DirectoryStream(const com::sun::star::uno::Reference<com::sun::star::ucb::XContent> &xContent);
     virtual ~DirectoryStream();
 
+    static DirectoryStream *createForParent(const com::sun::star::uno::Reference<com::sun::star::ucb::XContent> &xContent);
+    static bool isDirectory(const com::sun::star::uno::Reference<com::sun::star::ucb::XContent> &xContent);
+
     virtual bool isStructured() SAL_OVERRIDE;
     virtual unsigned subStreamCount() SAL_OVERRIDE;
     virtual const char *subStreamName(unsigned id) SAL_OVERRIDE;

writerperfect/source/common/DirectoryStream.cxx

@@ -19,6 +19,7 @@
  * For further information visit http://libwpd.sourceforge.net
  */
 
+#include <com/sun/star/container/XChild.hpp>
 #include <com/sun/star/io/XInputStream.hpp>
 #include <com/sun/star/sdbc/XResultSet.hpp>
 #include <com/sun/star/sdbc/XRow.hpp>
@@ -38,6 +39,7 @@
 #include <writerperfect/DirectoryStream.hxx>
 #include <writerperfect/WPXSvInputStream.hxx>
 
+namespace container = com::sun::star::container;
 namespace io = com::sun::star::io;
 namespace sdbc = com::sun::star::sdbc;
 namespace ucb = com::sun::star::ucb;
@@ -112,6 +114,45 @@ DirectoryStream::~DirectoryStream()
     delete m_pImpl;
 }
 
+DirectoryStream *DirectoryStream::createForParent(const com::sun::star::uno::Reference<com::sun::star::ucb::XContent> &xContent) try
+{
+    if (!xContent.is())
+        return 0;
+
+    DirectoryStream *pDir(0);
+
+    const uno::Reference<container::XChild> xChild(xContent, uno::UNO_QUERY);
+    if (xChild.is())
+    {
+        const uno::Reference<ucb::XContent> xDirContent(xChild->getParent(), uno::UNO_QUERY);
+        if (xDirContent.is())
+        {
+            pDir = new writerperfect::DirectoryStream(xDirContent);
+            if (!pDir->isStructured())
+                pDir = 0;
+        }
+    }
+
+    return pDir;
+}
+catch (...)
+{
+return 0;
+}
+
+bool DirectoryStream::isDirectory(const com::sun::star::uno::Reference<com::sun::star::ucb::XContent> &xContent) try
+{
+    if (!xContent.is())
+        return false;
+
+    ucbhelper::Content aContent(xContent, uno::Reference<ucb::XCommandEnvironment>(), comphelper::getProcessComponentContext());
+    return aContent.isFolder();
+}
+catch (...)
+{
+    return false;
+}
+
 bool DirectoryStream::isStructured()
 {
     return true;