gtk3 clipboard support

doesn't work yet, but reports correctly what external formats
are available

Change-Id: I11cf9440ca516d4358c341fa67cc836b30ca42d6
(cherry picked from commit b461e3189b9a95deef1e6c5e03b0e657b5754dfa)

1 files changed, 333 insertions, 0 deletions

diff --git a/vcl/unx/gtk3/app/gtk3gtkinst.cxx b/vcl/unx/gtk3/app/gtk3gtkinst.cxx
index c8cf2988397a..902dd665861b 100644
--- a/vcl/unx/gtk3/app/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/app/gtk3gtkinst.cxx
@@ -9,4 +9,337 @@
 
 #include "../../gtk/app/gtkinst.cxx"
 
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include "com/sun/star/lang/XServiceInfo.hpp"
+#include "com/sun/star/lang/XSingleServiceFactory.hpp"
+#include "com/sun/star/lang/XInitialization.hpp"
+#include "com/sun/star/lang/DisposedException.hpp"
+#include "com/sun/star/datatransfer/XTransferable.hpp"
+#include "com/sun/star/datatransfer/clipboard/XClipboard.hpp"
+#include "com/sun/star/datatransfer/clipboard/XClipboardEx.hpp"
+#include "com/sun/star/datatransfer/clipboard/XClipboardNotifier.hpp"
+#include "com/sun/star/datatransfer/clipboard/XClipboardListener.hpp"
+#include "com/sun/star/datatransfer/clipboard/XSystemClipboard.hpp"
+#include "com/sun/star/datatransfer/dnd/XDragSource.hpp"
+#include "com/sun/star/datatransfer/dnd/XDropTarget.hpp"
+#include "com/sun/star/datatransfer/dnd/DNDConstants.hpp"
+#include <comphelper/sequence.hxx>
+#include "cppuhelper/compbase.hxx"
+#include "cppuhelper/implbase1.hxx"
+#include <cppuhelper/supportsservice.hxx>
+
+using namespace com::sun::star;
+using namespace com::sun::star::uno;
+using namespace com::sun::star::lang;
+
+namespace
+{
+    struct TypeEntry
+    {
+        const char*     pNativeType;        // string corresponding to nAtom for the case of nAtom being uninitialized
+        const char*     pType;              // Mime encoding on our side
+    };
+
+    static TypeEntry aConversionTab[] =
+    {
+        { "ISO10646-1", "text/plain;charset=utf-16" },
+        { "UTF8_STRING", "text/plain;charset=utf-8" },
+        { "UTF-8", "text/plain;charset=utf-8" },
+        { "text/plain;charset=UTF-8", "text/plain;charset=utf-8" },
+        // ISO encodings
+        { "ISO8859-2", "text/plain;charset=iso8859-2" },
+        { "ISO8859-3", "text/plain;charset=iso8859-3" },
+        { "ISO8859-4", "text/plain;charset=iso8859-4" },
+        { "ISO8859-5", "text/plain;charset=iso8859-5" },
+        { "ISO8859-6", "text/plain;charset=iso8859-6" },
+        { "ISO8859-7", "text/plain;charset=iso8859-7" },
+        { "ISO8859-8", "text/plain;charset=iso8859-8" },
+        { "ISO8859-9", "text/plain;charset=iso8859-9" },
+        { "ISO8859-10", "text/plain;charset=iso8859-10" },
+        { "ISO8859-13", "text/plain;charset=iso8859-13" },
+        { "ISO8859-14", "text/plain;charset=iso8859-14" },
+        { "ISO8859-15", "text/plain;charset=iso8859-15" },
+        // asian encodings
+        { "JISX0201.1976-0", "text/plain;charset=jisx0201.1976-0" },
+        { "JISX0208.1983-0", "text/plain;charset=jisx0208.1983-0" },
+        { "JISX0208.1990-0", "text/plain;charset=jisx0208.1990-0" },
+        { "JISX0212.1990-0", "text/plain;charset=jisx0212.1990-0" },
+        { "GB2312.1980-0", "text/plain;charset=gb2312.1980-0" },
+        { "KSC5601.1992-0", "text/plain;charset=ksc5601.1992-0" },
+        // eastern european encodings
+        { "KOI8-R", "text/plain;charset=koi8-r" },
+        { "KOI8-U", "text/plain;charset=koi8-u" },
+        // String (== iso8859-1)
+        { "STRING", "text/plain;charset=iso8859-1" },
+        // special for compound text
+        { "COMPOUND_TEXT", "text/plain;charset=compound_text" },
+
+        // PIXMAP
+        { "PIXMAP", "image/bmp" }
+    };
+}
+
+class GtkTransferable : public ::cppu::WeakImplHelper1 <
+    css::datatransfer::XTransferable >
+{
+public:
+    GtkTransferable()
+    {
+    }
+
+    virtual ~GtkTransferable()
+    {
+    }
+
+    /*
+     * XTransferable
+     */
+
+    virtual css::uno::Any SAL_CALL getTransferData( const css::datatransfer::DataFlavor& aFlavor )
+        throw(css::datatransfer::UnsupportedFlavorException,
+              css::io::IOException,
+              css::uno::RuntimeException, std::exception
+              ) SAL_OVERRIDE
+    {
+        fprintf(stderr, "TO-DO getTransferData\n");
+        (void)aFlavor;
+        return css::uno::Any();
+    }
+
+    virtual css::uno::Sequence< css::datatransfer::DataFlavor > SAL_CALL getTransferDataFlavors(  )
+        throw(css::uno::RuntimeException, std::exception) SAL_OVERRIDE
+    {
+        GtkClipboard* clipboard = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
+
+        std::vector<css::datatransfer::DataFlavor> aVector;
+        GdkAtom *targets;
+        gint n_targets;
+        if (gtk_clipboard_wait_for_targets(clipboard, &targets, &n_targets))
+        {
+            bool bHaveText = false, bHaveUTF16 = false;
+
+            for (gint i = 0; i < n_targets; ++i)
+            {
+                gchar* pName = gdk_atom_name(targets[i]);
+                const char* pFinalName = pName;
+                css::datatransfer::DataFlavor aFlavor;
+
+                for (size_t j = 0; j < SAL_N_ELEMENTS(aConversionTab); ++j)
+                {
+                    if (rtl_str_compare(pName, aConversionTab[j].pNativeType) == 0)
+                    {
+                        pFinalName = aConversionTab[j].pType;
+                        break;
+                    }
+                }
+
+                aFlavor.MimeType = OUString(pFinalName,
+                                            rtl_str_getLength(pFinalName),
+                                            RTL_TEXTENCODING_UTF8);
+                aFlavor.DataType = cppu::UnoType<Sequence< sal_Int8 >>::get();
+
+                sal_Int32 nIndex(0);
+                if (aFlavor.MimeType.getToken(0, ';', nIndex) == "text/plain")
+                {
+                    bHaveText = true;
+                    OUString aToken(aFlavor.MimeType.getToken(0, ';', nIndex));
+                    if (aToken == "charset=utf-16")
+                    {
+                        bHaveUTF16 = true;
+                        aFlavor.DataType = cppu::UnoType<OUString>::get();
+                    }
+                }
+                aVector.push_back(aFlavor);
+                g_free(pName);
+            }
+
+            g_free(targets);
+
+            //If we have text, but no UTF-16 format which is basically the only
+            //text-format LibreOffice supports for cnp then claim we do and we
+            //will convert on demand
+            if (bHaveText && !bHaveUTF16)
+            {
+                css::datatransfer::DataFlavor aFlavor;
+                aFlavor.MimeType = "text/plain;charset=utf-16";
+                aFlavor.DataType = cppu::UnoType<OUString>::get();
+                aVector.push_back(aFlavor);
+            }
+        }
+
+        return comphelper::containerToSequence(aVector);
+    }
+
+    virtual sal_Bool SAL_CALL isDataFlavorSupported( const css::datatransfer::DataFlavor& aFlavor )
+        throw(css::uno::RuntimeException, std::exception) SAL_OVERRIDE
+    {
+        fprintf(stderr, "TODO isDataFlavorSupported\n");
+
+        (void)aFlavor;
+        return false;
+    }
+};
+
+class VclGtkClipboard :
+        public cppu::WeakComponentImplHelper<
+        datatransfer::clipboard::XSystemClipboard,
+        XServiceInfo
+        >
+{
+    osl::Mutex                                                              m_aMutex;
+    Reference< css::datatransfer::XTransferable >              m_aContents;
+    Reference< css::datatransfer::clipboard::XClipboardOwner > m_aOwner;
+    std::list< Reference< css::datatransfer::clipboard::XClipboardListener > > m_aListeners;
+
+public:
+
+    VclGtkClipboard() : cppu::WeakComponentImplHelper<
+        datatransfer::clipboard::XSystemClipboard,
+        XServiceInfo
+        >( m_aMutex )
+    {
+    }
+    virtual ~VclGtkClipboard();
+
+    /*
+     * XServiceInfo
+     */
+
+    virtual OUString SAL_CALL getImplementationName() throw( RuntimeException, std::exception ) SAL_OVERRIDE;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) throw( RuntimeException, std::exception ) SAL_OVERRIDE;
+    virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() throw( RuntimeException, std::exception ) SAL_OVERRIDE;
+
+    static OUString getImplementationName_static();
+    static Sequence< OUString > getSupportedServiceNames_static();
+
+    /*
+     * XClipboard
+     */
+
+    virtual Reference< css::datatransfer::XTransferable > SAL_CALL getContents()
+        throw(RuntimeException, std::exception) SAL_OVERRIDE;
+
+    virtual void SAL_CALL setContents(
+        const Reference< css::datatransfer::XTransferable >& xTrans,
+        const Reference< css::datatransfer::clipboard::XClipboardOwner >& xClipboardOwner )
+        throw(RuntimeException, std::exception) SAL_OVERRIDE;
+
+    virtual OUString SAL_CALL getName()
+        throw(RuntimeException, std::exception) SAL_OVERRIDE;
+
+    /*
+     * XClipboardEx
+     */
+
+    virtual sal_Int8 SAL_CALL getRenderingCapabilities()
+        throw(RuntimeException, std::exception) SAL_OVERRIDE;
+
+    /*
+     * XClipboardNotifier
+     */
+    virtual void SAL_CALL addClipboardListener(
+        const Reference< css::datatransfer::clipboard::XClipboardListener >& listener )
+        throw(RuntimeException, std::exception) SAL_OVERRIDE;
+
+    virtual void SAL_CALL removeClipboardListener(
+        const Reference< css::datatransfer::clipboard::XClipboardListener >& listener )
+        throw(RuntimeException, std::exception) SAL_OVERRIDE;
+};
+
+VclGtkClipboard::~VclGtkClipboard()
+{
+}
+
+OUString VclGtkClipboard::getImplementationName_static()
+{
+    return OUString( "com.sun.star.datatransfer.VclGtkClipboard"  );
+}
+
+Sequence< OUString > VclGtkClipboard::getSupportedServiceNames_static()
+{
+    Sequence< OUString > aRet(1);
+    aRet[0] = "com.sun.star.datatransfer.clipboard.SystemClipboard";
+    return aRet;
+}
+
+OUString VclGtkClipboard::getImplementationName() throw( RuntimeException, std::exception )
+{
+    return getImplementationName_static();
+}
+
+Sequence< OUString > VclGtkClipboard::getSupportedServiceNames() throw( RuntimeException, std::exception )
+{
+    return getSupportedServiceNames_static();
+}
+
+sal_Bool VclGtkClipboard::supportsService( const OUString& ServiceName ) throw( RuntimeException, std::exception )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+Reference< css::datatransfer::XTransferable > VclGtkClipboard::getContents() throw( RuntimeException, std::exception )
+{
+    if (! m_aContents.is())
+        m_aContents = new GtkTransferable();
+
+    return m_aContents;
+}
+
+void VclGtkClipboard::setContents(
+        const Reference< css::datatransfer::XTransferable >& xTrans,
+        const Reference< css::datatransfer::clipboard::XClipboardOwner >& xClipboardOwner )
+    throw( RuntimeException, std::exception )
+{
+    osl::ClearableMutexGuard aGuard( m_aMutex );
+    Reference< datatransfer::clipboard::XClipboardOwner > xOldOwner( m_aOwner );
+    Reference< datatransfer::XTransferable > xOldContents( m_aContents );
+    m_aContents = xTrans;
+    m_aOwner = xClipboardOwner;
+
+    std::list< Reference< datatransfer::clipboard::XClipboardListener > > xListeners( m_aListeners );
+    datatransfer::clipboard::ClipboardEvent aEv;
+    aEv.Contents = m_aContents;
+
+    aGuard.clear();
+
+    if( xOldOwner.is() && xOldOwner != xClipboardOwner )
+        xOldOwner->lostOwnership( this, xOldContents );
+    for( std::list< Reference< datatransfer::clipboard::XClipboardListener > >::iterator it =
+         xListeners.begin(); it != xListeners.end() ; ++it )
+    {
+        (*it)->changedContents( aEv );
+    }
+}
+
+OUString VclGtkClipboard::getName() throw( RuntimeException, std::exception )
+{
+    return OUString( "CLIPBOARD"  );
+}
+
+sal_Int8 VclGtkClipboard::getRenderingCapabilities() throw( RuntimeException, std::exception )
+{
+    return 0;
+}
+
+void VclGtkClipboard::addClipboardListener( const Reference< datatransfer::clipboard::XClipboardListener >& listener )
+    throw( RuntimeException, std::exception )
+{
+    osl::ClearableMutexGuard aGuard( m_aMutex );
+
+    m_aListeners.push_back( listener );
+}
+
+void VclGtkClipboard::removeClipboardListener( const Reference< datatransfer::clipboard::XClipboardListener >& listener )
+    throw( RuntimeException, std::exception )
+{
+    osl::ClearableMutexGuard aGuard( m_aMutex );
+
+    m_aListeners.remove( listener );
+}
+
+Reference< XInterface > GtkInstance::CreateClipboard( const Sequence< Any >& )
+{
+    return Reference< XInterface >( static_cast<cppu::OWeakObject *>(new VclGtkClipboard()) );
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */