+
+bool wxClipboard::SetSelectionOwner(bool set)
+{
+ bool rc = gtk_selection_owner_set
+ (
+ set ? m_clipboardWidget : NULL,
+ GTKGetClipboardAtom(),
+ (guint32)GDK_CURRENT_TIME
+ );
+
+ if ( !rc )
+ {
+ wxLogTrace(TRACE_CLIPBOARD, _T("Failed to %sset selection owner"),
+ set ? _T("") : _T("un"));
+ }
+
+ return rc;
+}
+
+void wxClipboard::AddSupportedTarget(GdkAtom atom)
+{
+ gtk_selection_add_target
+ (
+ m_clipboardWidget,
+ GTKGetClipboardAtom(),
+ atom,
+ 0 // info (same as client data) unused
+ );
+}
+
+bool wxClipboard::IsSupportedAsync(wxEvtHandler *sink)
+{
+ if (m_sink.get())
+ return false; // currently busy, come back later
+
+ wxCHECK_MSG( sink, false, wxT("no sink given") );
+
+ m_sink = sink;
+ gtk_selection_convert( m_targetsWidgetAsync,
+ GTKGetClipboardAtom(),
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+
+ return true;
+}
+
+bool wxClipboard::DoIsSupported(const wxDataFormat& format)
+{
+ wxCHECK_MSG( format, false, wxT("invalid clipboard format") );
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Checking if format %s is available"),
+ format.GetId().c_str());
+
+ // these variables will be used by our GTKOnTargetReceived()
+ m_targetRequested = format;
+ m_formatSupported = false;
+
+ // block until m_formatSupported is set from targets_selection_received
+ // callback
+ {
+ wxClipboardSync sync(*this);
+
+ gtk_selection_convert( m_targetsWidget,
+ GTKGetClipboardAtom(),
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+ }
+
+ return m_formatSupported;
+}
+
+// ----------------------------------------------------------------------------
+// wxClipboard public API implementation
+// ----------------------------------------------------------------------------
+
+void wxClipboard::Clear()
+{
+ if ( gdk_selection_owner_get(GTKGetClipboardAtom()) ==
+ m_clipboardWidget->window )
+ {
+ wxClipboardSync sync(*this);
+
+ // this will result in selection_clear_clip callback being called and
+ // it will free our data
+ SetSelectionOwner(false);
+ }
+
+ m_targetRequested = 0;
+ m_formatSupported = false;
+}
+
+bool wxClipboard::Open()
+{
+ wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
+
+ m_open = true;
+
+ return true;
+}
+
+bool wxClipboard::SetData( wxDataObject *data )
+{
+ wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
+
+ wxCHECK_MSG( data, false, wxT("data is invalid") );
+
+ Clear();
+
+ return AddData( data );
+}
+
+bool wxClipboard::AddData( wxDataObject *data )
+{
+ wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
+
+ wxCHECK_MSG( data, false, wxT("data is invalid") );
+
+ // we can only store one wxDataObject so clear the old one
+ Clear();
+
+ Data() = data;
+
+ // get formats from wxDataObjects
+ const size_t count = data->GetFormatCount();
+ wxDataFormatArray formats(new wxDataFormat[count]);
+ data->GetAllFormats(formats.get());
+
+ // always provide TIMESTAMP as a target, see comments in selection_handler
+ // for explanation
+ AddSupportedTarget(g_timestampAtom);
+
+ for ( size_t i = 0; i < count; i++ )
+ {
+ const wxDataFormat format(formats[i]);
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Adding support for %s"),
+ format.GetId().c_str());
+
+ AddSupportedTarget(format);
+ }
+
+ g_signal_connect (m_clipboardWidget, "selection_get",
+ G_CALLBACK (selection_handler),
+ GUINT_TO_POINTER (gtk_get_current_event_time()) );
+
+ // tell the world we offer clipboard data
+ return SetSelectionOwner();
+}
+
+void wxClipboard::Close()
+{
+ wxCHECK_RET( m_open, wxT("clipboard not open") );
+
+ m_open = false;
+}
+
+bool wxClipboard::IsOpened() const
+{
+ return m_open;
+}
+
+bool wxClipboard::IsSupported( const wxDataFormat& format )
+{
+ if ( DoIsSupported(format) )
+ return true;
+
+#if wxUSE_UNICODE
+ if ( format == wxDF_UNICODETEXT )
+ {
+ // also with plain STRING format
+ return DoIsSupported(g_altTextAtom);
+ }
+#endif // wxUSE_UNICODE
+
+ return false;
+}
+
+bool wxClipboard::GetData( wxDataObject& data )
+{
+ wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
+
+ // get all supported formats from wxDataObjects
+ const size_t count = data.GetFormatCount();
+ wxDataFormatArray formats(new wxDataFormat[count]);
+ data.GetAllFormats(formats.get());
+
+ for ( size_t i = 0; i < count; i++ )
+ {
+ const wxDataFormat format(formats[i]);
+
+ // is this format supported by clipboard ?
+ if ( !DoIsSupported(format) )
+ continue;
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Requesting format %s"),
+ format.GetId().c_str());
+
+ // these variables will be used by our GTKOnSelectionReceived()
+ m_receivedData = &data;
+ m_formatSupported = false;
+
+ {
+ wxClipboardSync sync(*this);
+
+ gtk_selection_convert(m_clipboardWidget,
+ GTKGetClipboardAtom(),
+ format,
+ (guint32) GDK_CURRENT_TIME );
+ } // wait until we get the results
+
+ /*
+ Normally this is a true error as we checked for the presence of such
+ data before, but there are applications that may return an empty
+ string (e.g. Gnumeric-1.6.1 on Linux if an empty cell is copied)
+ which would produce a false error message here, so we check for the
+ size of the string first. With ANSI, GetDataSize returns an extra
+ value (for the closing null?), with unicode, the exact number of
+ tokens is given (that is more than 1 for non-ASCII characters)
+ (tested with Gnumeric-1.6.1 and OpenOffice.org-2.0.2)
+ */
+#if wxUSE_UNICODE
+ if ( format != wxDF_UNICODETEXT || data.GetDataSize(format) > 0 )
+#else // !UNICODE
+ if ( format != wxDF_TEXT || data.GetDataSize(format) > 1 )
+#endif // UNICODE / !UNICODE
+ {
+ wxCHECK_MSG( m_formatSupported, false,
+ wxT("error retrieving data from clipboard") );
+ }
+
+ return true;
+ }
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("GetData(): format not found"));
+
+ return false;
+}
+
+#endif // wxUSE_CLIPBOARD
projects / wxWidgets.git / blobdiff