#ifdefed out Ole... functions for Cygwin.

[wxWidgets.git] / src / gtk1 / clipbrd.cpp

diff --git a/src/gtk1/clipbrd.cpp b/src/gtk1/clipbrd.cpp
index 10b56ff272ebbd410a14fb61f62d2b9bc97949f3..d7812a880f0a6bbbf69ea24ffa0e13c24a81e8c8 100644 (file)
--- a/src/gtk1/clipbrd.cpp
+++ b/src/gtk1/clipbrd.cpp
@@ -21,30 +21,87 @@ wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
 
 GdkAtom  g_textAtom        = 0;
 GdkAtom  g_clipboardAtom   = 0;
 
 GdkAtom  g_textAtom        = 0;
 GdkAtom  g_clipboardAtom   = 0;

+GdkAtom  g_targetsAtom     = 0;

 
 //-----------------------------------------------------------------------------
 
 //-----------------------------------------------------------------------------

-// functions
+// reminder

 //-----------------------------------------------------------------------------
 
 //-----------------------------------------------------------------------------
 

-void wxInitClipboard()
+/* The contents of a selection are returned in a GtkSelectionData
+   structure. selection/target identify the request. 
+   type specifies the type of the return; if length < 0, and
+   the data should be ignored. This structure has object semantics -
+   no fields should be modified directly, they should not be created
+   directly, and pointers to them should not be stored beyond the duration of
+   a callback. (If the last is changed, we'll need to add reference
+   counting)
+
+struct _GtkSelectionData

 {
 {

-  if (wxTheClipboard) delete wxTheClipboard;
-  wxTheClipboard = new wxClipboard();
-}
+  GdkAtom selection;
+  GdkAtom target;
+  GdkAtom type;
+  gint   format;
+  guchar *data;
+  gint   length;
+};

 
 

-void wxDoneClipboard()
+*/
+
+//-----------------------------------------------------------------------------
+// "selection_received" for targets
+//-----------------------------------------------------------------------------
+
+static void
+targets_selection_received( GtkWidget *WXUNUSED(widget), 
+                            GtkSelectionData *selection_data, 
+                           wxClipboard *clipboard )

 {
 {

-  if (wxTheClipboard) delete wxTheClipboard;
-  wxTheClipboard = (wxClipboard*) NULL;
+  if (!wxTheClipboard) return;
+  
+  if (selection_data->length <= 0) return;
+  
+  // make sure we got the data in the correct form 
+  if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;
+  
+  // the atoms we received, holding a list of targets (= formats) 
+  GdkAtom *atoms = (GdkAtom *)selection_data->data;
+
+  for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
+  {
+     if (atoms[i] == clipboard->m_targetRequested)
+     {
+       clipboard->m_formatSupported = TRUE;
+       return;
+     }
+  }
+
+  return;

 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------

-// "selection_received"
+// "selection_received" for the actual data

 //-----------------------------------------------------------------------------
 
 static void 
 //-----------------------------------------------------------------------------
 
 static void 

-selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointer data )
+selection_received( GtkWidget *WXUNUSED(widget), 
+                    GtkSelectionData *selection_data, 
+                   wxClipboard *clipboard )

 {
 {

+  if (!wxTheClipboard) return;
+  
+  if (selection_data->length <= 0) return;
+  
+  size_t size = (size_t) selection_data->length;
+  
+  // make sure we got the data in the correct form 
+  if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
+  
+  clipboard->m_receivedSize = size;
+  
+  clipboard->m_receivedData = new char[size+1];
+  
+  memcpy( clipboard->m_receivedData, selection_data->data, size);  

 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------


@@ -52,13 +109,13 @@ selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointe
 //-----------------------------------------------------------------------------
 
 static gint
 //-----------------------------------------------------------------------------
 
 static gint

-selection_clear( GtkWidget *widget, GdkEventSelection *event )
+selection_clear( GtkWidget *WXUNUSED(widget), GdkEventSelection *WXUNUSED(event) )

 {
 {

-  /* The clipboard is no longer in our hands. We can delete the
-   * clipboard data. I hope I got that one right... */
-    

   if (!wxTheClipboard) return TRUE;
   
   if (!wxTheClipboard) return TRUE;
   

+  /* the clipboard is no longer in our hands. we can delete the
+   * clipboard data. I hope I got that one right... */
+    

   wxTheClipboard->SetData( (wxDataObject*) NULL );
   
   return TRUE;
   wxTheClipboard->SetData( (wxDataObject*) NULL );
   
   return TRUE;


@@ -77,22 +134,26 @@ selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data
   
   if (!data_object) return;
   
   
   if (!data_object) return;
   

-  if (data_object->GetDataSize() == 0) return;  
+  if (data_object->GetDataSize() == 0) return;
+
+  

   
   gint len = data_object->GetDataSize();
   guchar *bin_data = (guchar*) malloc( len );
   data_object->GetDataHere( (void*)bin_data );
   
   
   gint len = data_object->GetDataSize();
   guchar *bin_data = (guchar*) malloc( len );
   data_object->GetDataHere( (void*)bin_data );
   

-  if (selection_data->target == GDK_SELECTION_TYPE_STRING)
+  if (selection_data->target == GDK_TARGET_STRING)

   {
     gtk_selection_data_set( 
       selection_data, GDK_SELECTION_TYPE_STRING, 8*sizeof(gchar), bin_data, len );
   }
   {
     gtk_selection_data_set( 
       selection_data, GDK_SELECTION_TYPE_STRING, 8*sizeof(gchar), bin_data, len );
   }

+/*

   else if (selection_data->target == g_textAtom)
   {
     gtk_selection_data_set( 
       selection_data, g_textAtom, 8*sizeof(gchar), bin_data, len );
   }
   else if (selection_data->target == g_textAtom)
   {
     gtk_selection_data_set( 
       selection_data, g_textAtom, 8*sizeof(gchar), bin_data, len );
   }

+*/

   free( bin_data );
 }
 
   free( bin_data );
 }
 


@@ -105,9 +166,10 @@ IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
 wxClipboard::wxClipboard()
 {
   m_data = (wxDataObject*) NULL;
 wxClipboard::wxClipboard()
 {
   m_data = (wxDataObject*) NULL;

+  

   m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
   gtk_widget_realize( m_clipboardWidget );
   m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
   gtk_widget_realize( m_clipboardWidget );

-  
+

   gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
                       "selection_clear_event",
                      GTK_SIGNAL_FUNC( selection_clear ), 
   gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
                       "selection_clear_event",
                      GTK_SIGNAL_FUNC( selection_clear ), 


@@ -115,23 +177,65 @@ wxClipboard::wxClipboard()
                      
   if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
   if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
                      
   if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
   if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );

+  if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
+  
+  m_receivedData = (char*)NULL;
+  m_receivedSize = 0;
+  m_formatSupported = FALSE;
+  m_targetRequested = 0;

 }
 
 wxClipboard::~wxClipboard()
 }
 
 wxClipboard::~wxClipboard()

+{
+  Clear();  
+  
+  if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+}
+
+void wxClipboard::Clear()

 {
   /* As we have data we also own the clipboard. Once we no longer own
      it, clear_selection is called which will set m_data to zero */
      
   if (m_data)
   { 
 {
   /* As we have data we also own the clipboard. Once we no longer own
      it, clear_selection is called which will set m_data to zero */
      
   if (m_data)
   { 

+    if (gdk_selection_owner_get( g_clipboardAtom) == m_clipboardWidget->window)
+    {
+        gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
+    }
+    

     delete m_data;
     delete m_data;

-    gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
+    m_data = (wxDataObject*) NULL;

   }
   }

-  if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+  
+  m_receivedSize = 0;
+  
+  if (m_receivedData)
+  {
+    delete[] m_receivedData;
+    m_receivedData = (char*) NULL;
+  }
+  
+  m_targetRequested = 0;
+  
+  m_formatSupported = FALSE;

 }
 
 void wxClipboard::SetData( wxDataObject *data )
 {
 }
 
 void wxClipboard::SetData( wxDataObject *data )
 {

+  Clear();
+  
+/*
+   GTK 1.0.X cannot remove a target from a widget so if a widget
+   at first offers text and then a bitmap (and no longer text) to 
+   the clipboard, we seem too have to delete it.
+*/
+
+  if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+  
+  m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
+  gtk_widget_realize( m_clipboardWidget );
+

   if (m_data) delete m_data;
   m_data = data;
   if (!m_data) return;
   if (m_data) delete m_data;
   m_data = data;
   if (!m_data) return;


@@ -147,38 +251,116 @@ void wxClipboard::SetData( wxDataObject *data )
   
   switch (m_data->GetPreferredFormat())
   {
   
   switch (m_data->GetPreferredFormat())
   {

-/*
-    case wxDF_STRING:
-      gtk_selection_add_handler( m_clipboardWidget, 
-                                 g_clipboardAtom, 
-                                GDK_TARGET_STRING,
-                                selection_handler,
-                                NULL );
-      break;

     case wxDF_TEXT:
       gtk_selection_add_handler( m_clipboardWidget, 
                                  g_clipboardAtom, 
     case wxDF_TEXT:
       gtk_selection_add_handler( m_clipboardWidget, 
                                  g_clipboardAtom, 

-                                g_textAtom,
+                               // g_textAtom,
+                                GDK_TARGET_STRING,

                                 selection_handler,
                                 NULL );
       break;
                                 selection_handler,
                                 NULL );
       break;

-*/

     default:
       break;
   }
 }
 
     default:
       break;
   }
 }
 

-void *wxClipboard::GetData( wxDataFormat format, size_t *length )
+bool wxClipboard::IsSupportedFormat( wxDataFormat format )

 {
 {

-  if (!IsAvailable(format))
+  m_targetRequested = 0;
+  
+  if (format == wxDF_TEXT)
+  {
+//     m_targetRequested = g_textAtom;
+     m_targetRequested = GDK_TARGET_STRING;
+  }
+  
+  if (m_targetRequested == 0) return FALSE;
+
+  gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
+                      "selection_received",
+                     GTK_SIGNAL_FUNC( targets_selection_received ), 
+                     (gpointer) this );
+  
+  m_formatSupported = FALSE;
+  
+  gtk_selection_convert( m_clipboardWidget,
+                        g_clipboardAtom, 
+                        g_targetsAtom,
+                        GDK_CURRENT_TIME );
+
+  gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget), 
+                                GTK_SIGNAL_FUNC( targets_selection_received ),
+                                (gpointer) this );
+  
+  if (!m_formatSupported) return FALSE;
+  
+  return TRUE;
+}
+
+bool wxClipboard::ObtainData( wxDataFormat format )
+{
+  m_receivedSize = 0;
+  
+  if (m_receivedData)
+  {
+    delete[] m_receivedData;
+    m_receivedData = (char*) NULL;
+  }
+  
+  m_targetRequested = 0;
+  
+  if (format == wxDF_TEXT)

   {
   {

-    if (length) *length = 0;
-    return NULL;
+//     m_targetRequested = g_textAtom;
+     m_targetRequested = GDK_TARGET_STRING;

   }
   }

-  return NULL;
+  
+  if (m_targetRequested == 0) return FALSE;
+
+  gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
+                      "selection_received",
+                     GTK_SIGNAL_FUNC( selection_received ), 
+                     (gpointer) this );
+
+  gtk_selection_convert( m_clipboardWidget,
+                        g_clipboardAtom, 
+                        m_targetRequested,
+                        GDK_CURRENT_TIME );
+  
+  gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget), 
+                                GTK_SIGNAL_FUNC( selection_received ),
+                                (gpointer) this );
+    
+  if (m_receivedSize == 0) return FALSE;
+  
+  return TRUE;

 }
 
 }
 

-bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) )
+size_t wxClipboard::GetDataSize() const

 {
 {

-  return FALSE;
+  return m_receivedSize;
+}
+
+void wxClipboard::GetDataHere( void *data ) const
+{
+  memcpy(data, m_receivedData, m_receivedSize );
+}
+
+//-----------------------------------------------------------------------------
+// wxClipboardModule
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
+
+bool wxClipboardModule::OnInit()
+{
+  wxTheClipboard = new wxClipboard();
+  
+  return TRUE;
+}
+
+void wxClipboardModule::OnExit()
+{
+  if (wxTheClipboard) delete wxTheClipboard;
+  wxTheClipboard = (wxClipboard*) NULL;

 }
 }