X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/06cfab17389f4bbd38560dd86ee39931e979bb1e..22d6efa851642c6a69174278fc50f712f41e2271:/src/gtk/clipbrd.cpp?ds=sidebyside

diff --git a/src/gtk/clipbrd.cpp b/src/gtk/clipbrd.cpp
index 4314ac726b..827e86ea22 100644
--- a/src/gtk/clipbrd.cpp
+++ b/src/gtk/clipbrd.cpp
@@ -15,17 +15,27 @@
 
 #if wxUSE_CLIPBOARD
 
+#include "wx/utils.h"
+
 #include "glib.h"
 #include "gdk/gdk.h"
 #include "gtk/gtk.h"
 
+//-----------------------------------------------------------------------------
+// thread system
+//-----------------------------------------------------------------------------
+
+#if wxUSE_THREADS
+extern void wxapp_install_thread_wakeup();
+extern void wxapp_uninstall_thread_wakeup();
+#endif
+
 //-----------------------------------------------------------------------------
 // data
 //-----------------------------------------------------------------------------
 
 wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
 
-GdkAtom  g_textAtom        = 0;
 GdkAtom  g_clipboardAtom   = 0;
 GdkAtom  g_targetsAtom     = 0;
 
@@ -61,27 +71,47 @@ struct _GtkSelectionData
 static void
 targets_selection_received( GtkWidget *WXUNUSED(widget), 
                             GtkSelectionData *selection_data, 
+#if (GTK_MINOR_VERSION > 0)
+                            guint32 WXUNUSED(time),
+#endif
 		            wxClipboard *clipboard )
 {
-    if (!wxTheClipboard) return;
-  
-    if (selection_data->length <= 0) return;
+    if (!wxTheClipboard)
+    {
+        clipboard->m_waiting = FALSE;
+        return;
+    }
   
-    // make sure we got the data in the correct form 
-    if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;
+    if (selection_data->length <= 0)
+    {
+        clipboard->m_waiting = FALSE;
+        return;
+    }
+    
+    /* make sure we got the data in the correct form */
+    if (selection_data->type != GDK_SELECTION_TYPE_ATOM)
+    {
+        clipboard->m_waiting = FALSE;
+        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++)
     {
+/*        char *name = gdk_atom_name (atoms[i]);
+        if (name) printf( "Format available: %s.\n", name ); */
+      
         if (atoms[i] == clipboard->m_targetRequested)
         {
+            clipboard->m_waiting = FALSE;
             clipboard->m_formatSupported = TRUE;
             return;
         }
     }
 
+    clipboard->m_waiting = FALSE;
     return;
 }
 
@@ -92,28 +122,50 @@ targets_selection_received( GtkWidget *WXUNUSED(widget),
 static void 
 selection_received( GtkWidget *WXUNUSED(widget), 
                     GtkSelectionData *selection_data, 
+#if (GTK_MINOR_VERSION > 0)
+                    guint32 WXUNUSED(time),
+#endif
 		    wxClipboard *clipboard )
 {
-    if (!wxTheClipboard) return;
+    if (!wxTheClipboard)
+    {
+        clipboard->m_waiting = FALSE;
+        return;
+    }
   
     wxDataObject *data_object = clipboard->m_receivedData;
     
-    if (!data_object) return;
+    if (!data_object)
+    {
+        clipboard->m_waiting = FALSE;
+        return;
+    }
     
-    if (selection_data->length <= 0) return;
+    if (selection_data->length <= 0)
+    {
+        clipboard->m_waiting = FALSE;
+        return;
+    }
   
-    // make sure we got the data in the correct format
-    
-    if (data_object->m_formatAtom != selection_data->target) return;
+    /* make sure we got the data in the correct format */
+    if (data_object->GetFormat().GetAtom() != selection_data->target)
+    {
+        clipboard->m_waiting = FALSE;
+        return;
+    }
     
-    // make sure we got the data in the correct form (selection type).
-    // if so, copy data to target object
+    /* make sure we got the data in the correct form (selection type).
+       if so, copy data to target object */
     
-    switch (data_object->GetFormat())
+    switch (data_object->GetFormat().GetType())
     {
         case wxDF_TEXT:
 	{
-            if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
+            if (selection_data->type != GDK_SELECTION_TYPE_STRING)
+            {
+                clipboard->m_waiting = FALSE;
+                return;
+            }
 	    
 	    wxTextDataObject *text_object = (wxTextDataObject *) data_object;
 	    
@@ -126,16 +178,22 @@ selection_received( GtkWidget *WXUNUSED(widget),
 	
 	case wxDF_BITMAP:
 	{
-            if (selection_data->type != GDK_SELECTION_TYPE_BITMAP) return;
-	    
-	    return;
+            if (selection_data->type != GDK_SELECTION_TYPE_BITMAP)
+            {
+                clipboard->m_waiting = FALSE;
+                return;
+            }
 	    
 	    break;
 	}
 	
 	case wxDF_PRIVATE:
 	{
-            if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
+            if (selection_data->type != GDK_SELECTION_TYPE_STRING)
+            {
+                clipboard->m_waiting = FALSE;
+                return;
+            }
 	    
 	    wxPrivateDataObject *private_object = (wxPrivateDataObject *) data_object;
 	    
@@ -146,11 +204,13 @@ selection_received( GtkWidget *WXUNUSED(widget),
 	
 	default:
 	{
+            clipboard->m_waiting = FALSE;
 	    return;
 	}
     }
     
     wxTheClipboard->m_formatSupported = TRUE;
+    clipboard->m_waiting = FALSE;
 }
 
 //-----------------------------------------------------------------------------
@@ -173,18 +233,22 @@ selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
     }
     else
     {
+        wxTheClipboard->m_waiting = FALSE;
         return FALSE;
     }
     
     if ((!wxTheClipboard->m_ownsPrimarySelection) &&
         (!wxTheClipboard->m_ownsClipboard))
     {
-        // the clipboard is no longer in our hands. we can the
-        // clipboard data.
-    
-        wxTheClipboard->m_dataObjects.Clear();
+        /* the clipboard is no longer in our hands. we can the delete clipboard data. */
+        if (wxTheClipboard->m_dataBroker)
+	{
+	    delete wxTheClipboard->m_dataBroker;
+	    wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL;
+	}
     }
   
+    wxTheClipboard->m_waiting = FALSE;
     return TRUE;
 }
 
@@ -197,19 +261,21 @@ selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data
 {
     if (!wxTheClipboard) return;
   
-    wxNode *node = wxTheClipboard->m_dataObjects.First();
+    if (!wxTheClipboard->m_dataBroker) return;
+  
+    wxNode *node = wxTheClipboard->m_dataBroker->m_dataObjects.First();
     
     while (node)
     {
         wxDataObject *data_object = (wxDataObject *)node->Data();
     
-	if (data_object->m_formatAtom != selection_data->target)
+	if (data_object->GetFormat().GetAtom() != selection_data->target)
 	{
 	    node = node->Next();
-	    break;
+	    continue;
 	}
 	
-	switch (data_object->GetFormat())
+	switch (data_object->GetFormat().GetType())
 	{
 	    case wxDF_TEXT:
 	    {
@@ -217,14 +283,19 @@ selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data
 	    
 	        wxString text = text_object->GetText();
 	    
-		char *s = WXSTRINGCAST text;
+#if wxUSE_UNICODE
+		const wxWX2MBbuf s = text.mbc_str();
+		int len = strlen(s);
+#else // more efficient in non-Unicode
+		const char *s = text.c_str();
 		int len = (int) text.Length();
+#endif
 		
                 gtk_selection_data_set( 
                     selection_data, 
 		    GDK_SELECTION_TYPE_STRING, 
 		    8*sizeof(gchar),
-		    (unsigned char*) s, 
+		    (unsigned char*) (const char*) s,
 		    len ); 
 		    
 		break;
@@ -243,14 +314,14 @@ selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data
             {
 	        wxPrivateDataObject *private_object = (wxPrivateDataObject*) data_object;
 	    
-	        if (private_object->GetDataSize() == 0) return;
+	        if (private_object->GetSize() == 0) return;
 	    
                 gtk_selection_data_set( 
                     selection_data, 
 		    GDK_SELECTION_TYPE_STRING, 
 		    8*sizeof(gchar), 
 		    (unsigned char*) private_object->GetData(), 
-		    (int) private_object->GetDataSize() );
+		    (int) private_object->GetSize() );
 	    }
 	    
 	    default:
@@ -274,24 +345,42 @@ wxClipboard::wxClipboard()
     m_ownsClipboard = FALSE;
     m_ownsPrimarySelection = FALSE;
 
-    m_dataObjects.DeleteContents( TRUE );
+    m_dataBroker = (wxDataBroker*) NULL;
   
     m_receivedData = (wxDataObject*) NULL;
 
+    /* we use m_targetsWidget to query what formats are available */
+    
+    m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
+    gtk_widget_realize( m_targetsWidget );
+
+    gtk_signal_connect( GTK_OBJECT(m_targetsWidget), 
+                        "selection_received",
+		        GTK_SIGNAL_FUNC( targets_selection_received ), 
+		        (gpointer) this );
+			
+    /* we use m_clipboardWidget to get and to offer data */
+    
     m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
     gtk_widget_realize( m_clipboardWidget );
 
+    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
+                        "selection_received",
+		        GTK_SIGNAL_FUNC( selection_received ), 
+		        (gpointer) this );
+
     gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
                         "selection_clear_event",
 		        GTK_SIGNAL_FUNC( selection_clear_clip ), 
 		        (gpointer) NULL );
 		      
     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_formatSupported = FALSE;
     m_targetRequested = 0;
+    
+    m_usePrimary = FALSE;
 }
 
 wxClipboard::~wxClipboard()
@@ -299,26 +388,48 @@ wxClipboard::~wxClipboard()
     Clear();  
   
     if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+    if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
 }
 
 void wxClipboard::Clear()
 {
-    if (m_dataObjects.GetCount())
+    if (m_dataBroker)
     { 
+#if wxUSE_THREADS
+        /* disable GUI threads */
+        wxapp_uninstall_thread_wakeup();
+#endif
+    
         /*  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 (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
         {
+            m_waiting = TRUE;
+	    
             gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
+	    
+            while (m_waiting) gtk_main_iteration();
         }
     
         if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
         {
+            m_waiting = TRUE;
+	    
             gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
+	    
+            while (m_waiting) gtk_main_iteration();
         }
     
-        m_dataObjects.Clear();
+        if (m_dataBroker)
+	{
+	    delete m_dataBroker;
+	    m_dataBroker = (wxDataBroker*) NULL;
+	}
+	
+#if wxUSE_THREADS
+        /* re-enable GUI threads */
+        wxapp_install_thread_wakeup();
+#endif
     }
   
     m_targetRequested = 0;
@@ -328,75 +439,93 @@ void wxClipboard::Clear()
 
 bool wxClipboard::Open()
 {
-    wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );
+    wxCHECK_MSG( !m_open, FALSE, _T("clipboard already open") );
   
     m_open = TRUE;
-  
+    
     return TRUE;
 }
 
 bool wxClipboard::SetData( wxDataObject *data )
 {
-    wxCHECK_MSG( data, FALSE, "data is invalid" );
+    wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
   
-    wxNode *node = m_dataObjects.First();
-    
-    while (node)
-    {
-        wxDataObject *d = (wxDataObject*)node->Data();
-	
-	if (d->GetFormat() == data->GetFormat())
-	{
-	    m_dataObjects.DeleteNode( node );
-	    
-	    break;
-	}
-	
-        node = node->Next();
-    }
-    
-    m_dataObjects.Append( data );
+    wxCHECK_MSG( data, FALSE, _T("data is invalid") );
   
-    wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
+    Clear();
+
+    return AddData( data );
+}
+
+bool wxClipboard::AddData( wxDataObject *data )
+{
+    wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
   
-    if (data->GetFormat() == wxDF_PRIVATE)
-    {
-        wxPrivateDataObject* pd = (wxPrivateDataObject*) data;
-	
-        wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
+    wxCHECK_MSG( data, FALSE, _T("data is invalid") );
+    
+    /* if clipboard has been cleared before, create new data broker */
+    if (!m_dataBroker) m_dataBroker = new wxDataBroker();
+  
+    /* add new data to list of offered data objects */
+    m_dataBroker->Add( data );
+    
+    /* get native format id of new data object */
+    GdkAtom format = data->GetFormat().GetAtom();
 	
-        data->m_formatAtom = GetTargetAtom( data->GetFormat(), pd->GetId() );
-    }
-    else
-    {
-        data->m_formatAtom = GetTargetAtom( data->GetFormat() );
-    }
+    wxCHECK_MSG( format, FALSE, _T("data has invalid format") );
     
-    // This should happen automatically
-      
+    /* This should happen automatically, but to be on the safe side */
     m_ownsClipboard = FALSE;
     m_ownsPrimarySelection = FALSE;
     
-    // Add handlers if someone requests data
-  
+    /* Add handlers if someone requests data */
+
+#if (GTK_MINOR_VERSION > 0)
+
+    gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget), 
+                              GDK_SELECTION_PRIMARY,
+			      format, 
+			      0 );  /* what is info ? */
+			     
+    gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget), 
+                              g_clipboardAtom,
+			      format, 
+			      0 );  /* what is info ? */
+			     
+    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
+                        "selection_get",
+		        GTK_SIGNAL_FUNC(selection_handler), 
+		        (gpointer) NULL );
+
+#else
+
     gtk_selection_add_handler( m_clipboardWidget, 
                                g_clipboardAtom,
-			       data->m_formatAtom,
+			       format,
 			       selection_handler,
-			       NULL );
+			       (gpointer) NULL );
 			       
     gtk_selection_add_handler( m_clipboardWidget, 
                                GDK_SELECTION_PRIMARY,
-			       data->m_formatAtom,
+			       format,
 			       selection_handler,
-			       NULL );
-			       
-    // Tell the world we offer clipboard data
-  
+			       (gpointer) NULL );
+#endif
+
+#if wxUSE_THREADS
+        /* disable GUI threads */
+        wxapp_uninstall_thread_wakeup();
+#endif
+    
+    /* Tell the world we offer clipboard data */
     if (!gtk_selection_owner_set( m_clipboardWidget, 
                                   g_clipboardAtom,
 				  GDK_CURRENT_TIME ))
     {
+#if wxUSE_THREADS
+        /* re-enable GUI threads */
+        wxapp_install_thread_wakeup();
+#endif
         return FALSE;
     }
     m_ownsClipboard = TRUE;
@@ -404,131 +533,109 @@ bool wxClipboard::SetData( wxDataObject *data )
     if (!gtk_selection_owner_set( m_clipboardWidget, 
                                   GDK_SELECTION_PRIMARY,
 				  GDK_CURRENT_TIME ))
-    {
+    {  
+#if wxUSE_THREADS
+        /* re-enable GUI threads */
+        wxapp_install_thread_wakeup();
+#endif
         return FALSE;
     }
     m_ownsPrimarySelection = TRUE;
-			     
+    
+#if wxUSE_THREADS
+    /* re-enable GUI threads */
+    wxapp_install_thread_wakeup();
+#endif
+	
     return TRUE;
 }
 
 void wxClipboard::Close()
 {
-    wxCHECK_RET( m_open, "clipboard not open" );
+    wxCHECK_RET( m_open, _T("clipboard not open") );
     
     m_open = FALSE;
 }
 
-bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString &id )
+bool wxClipboard::IsSupported( wxDataFormat format )
 {
-    m_targetRequested = GetTargetAtom( format, id );
-  
-    if (m_targetRequested == 0) return FALSE;
+    wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
     
-    // add handler for target (= format) query
-
-    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
-                        "selection_received",
-		        GTK_SIGNAL_FUNC( targets_selection_received ), 
-		        (gpointer) this );
+    /* store requested format to be asked for by callbacks */
+    
+    m_targetRequested = format.GetAtom();
   
+    wxCHECK_MSG( m_targetRequested, FALSE, _T("invalid clipboard format") );
+    
     m_formatSupported = FALSE;
   
-    // perform query. this will set m_formatSupported to 
-    // TRUE if m_targetRequested is supported
-    
-    gtk_selection_convert( m_clipboardWidget,
-			   g_clipboardAtom, 
+    /* perform query. this will set m_formatSupported to 
+       TRUE if m_targetRequested is supported.
+       alsom we have to wait for the "answer" from the 
+       clipboard owner which is an asynchronous process.
+       therefore we set m_waiting = TRUE here and wait
+       until the callback "targets_selection_received" 
+       sets it to FALSE */
+
+    m_waiting = TRUE;
+
+    gtk_selection_convert( m_targetsWidget,
+			   m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom, 
 			   g_targetsAtom,
 			   GDK_CURRENT_TIME );
 
-    gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget), 
-		                   GTK_SIGNAL_FUNC( targets_selection_received ),
-		                   (gpointer) this );
-  
+    while (m_waiting) gtk_main_iteration();
+    
     if (!m_formatSupported) return FALSE;
-  
+    
     return TRUE;
-}
-
+}    
+    
 bool wxClipboard::GetData( wxDataObject *data )
 {
-    wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
+    wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
     
-    m_receivedData = data;
+    /* is data supported by clipboard ? */
     
-    wxCHECK_MSG( m_receivedData, FALSE, "invalid data object" );
+    if (!IsSupported( data->GetFormat() )) return FALSE;
     
-    if (m_receivedData->GetFormat() == wxDF_PRIVATE)
-    {
-        wxPrivateDataObject* pd = (wxPrivateDataObject*) m_receivedData;
-	
-        wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
-	
-        m_targetRequested = GetTargetAtom( m_receivedData->GetFormat(), pd->GetId() );
-    }
-    else
-    {
-        m_targetRequested = GetTargetAtom( m_receivedData->GetFormat() );
-    }
+    /* store pointer to data object to be filled up by callbacks */
     
-    data->m_formatAtom = m_targetRequested;
-  
-    wxCHECK_MSG( m_targetRequested, FALSE, "unsupported clipboard format" );
+    m_receivedData = data;
+    
+    /* store requested format to be asked for by callbacks */
+    
+    m_targetRequested = data->GetFormat().GetAtom();
   
+    wxCHECK_MSG( m_targetRequested, FALSE, _T("invalid clipboard format") );
+    
+    /* start query */
+    
     m_formatSupported = FALSE;
   
-    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
-                        "selection_received",
-		        GTK_SIGNAL_FUNC( selection_received ), 
-		        (gpointer) this );
+    /* ask for clipboard contents.  this will set 
+       m_formatSupported to TRUE if m_targetRequested 
+       is supported.
+       also, we have to wait for the "answer" from the 
+       clipboard owner which is an asynchronous process.
+       therefore we set m_waiting = TRUE here and wait
+       until the callback "targets_selection_received" 
+       sets it to FALSE */
+
+    m_waiting = TRUE;
 
     gtk_selection_convert( m_clipboardWidget,
-			   g_clipboardAtom, 
+			   m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom, 
 			   m_targetRequested,
 			   GDK_CURRENT_TIME );
   
-    gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget), 
-		                   GTK_SIGNAL_FUNC( selection_received ),
-		                   (gpointer) this );
+    while (m_waiting) gtk_main_iteration();
 
-    wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" );
-  
-    return TRUE;
-}
+    /* this is a true error as we checked for the presence of such data before */
 
-GdkAtom wxClipboard::GetTargetAtom( wxDataFormat format, const wxString &id )
-{
-    // What is X representation of that format?
+    wxCHECK_MSG( m_formatSupported, FALSE, _T("error retrieving data from clipboard") );
   
-    switch (format)
-    {
-        case wxDF_TEXT:
-        {
-            return GDK_TARGET_STRING;
-				// g_textAtom
-        }
-      
-        case wxDF_BITMAP:
-        {
-            return GDK_TARGET_BITMAP;
-            break;
-        }
-      
-        case wxDF_PRIVATE:
-        {
-            // we create our own X representation
-    
-            return gdk_atom_intern( WXSTRINGCAST( id ), FALSE );
-        }
-	
-	default:
-	{
-	    return (GdkAtom) 0;
-	}
-    }
-	
-    return (GdkAtom) 0;
+    return TRUE;
 }
 
 //-----------------------------------------------------------------------------