#include "wx/clipbrd.h"
+#if wxUSE_CLIPBOARD
+
+#include "wx/utils.h"
+
+#include "glib.h"
+#include "gdk/gdk.h"
+#include "gtk/gtk.h"
+
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
+GdkAtom g_clipboardAtom = 0;
+GdkAtom g_targetsAtom = 0;
+
+//-----------------------------------------------------------------------------
+// reminder
+//-----------------------------------------------------------------------------
+
+/* 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
+{
+ GdkAtom selection;
+ GdkAtom target;
+ GdkAtom type;
+ gint format;
+ guchar *data;
+ gint length;
+};
+
+*/
+
+//-----------------------------------------------------------------------------
+// "selection_received" for targets
+//-----------------------------------------------------------------------------
+
+static void
+targets_selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+#if (GTK_MINOR_VERSION > 0)
+ guint32 WXUNUSED(time),
+#endif
+ wxClipboard *clipboard )
+{
+ if (!wxTheClipboard)
+ {
+ clipboard->m_waiting = FALSE;
+ 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;
+}
+
//-----------------------------------------------------------------------------
-// functions
+// "selection_received" for the actual data
//-----------------------------------------------------------------------------
-void wxInitClipboard()
+static void
+selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+#if (GTK_MINOR_VERSION > 0)
+ guint32 WXUNUSED(time),
+#endif
+ wxClipboard *clipboard )
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = new wxClipboard();
+ if (!wxTheClipboard)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+ wxDataObject *data_object = clipboard->m_receivedData;
+
+ if (!data_object)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+ if (selection_data->length <= 0)
+ {
+ clipboard->m_waiting = FALSE;
+ 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 */
+
+ switch (data_object->GetFormat().GetType())
+ {
+ case wxDF_TEXT:
+ {
+ if (selection_data->type != GDK_SELECTION_TYPE_STRING)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+ wxTextDataObject *text_object = (wxTextDataObject *) data_object;
+
+ wxString text = (const char*) selection_data->data;
+
+ text_object->SetText( text );
+
+ break;
+ }
+
+ case wxDF_BITMAP:
+ {
+ 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)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+ wxPrivateDataObject *private_object = (wxPrivateDataObject *) data_object;
+
+ private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );
+
+ break;
+ }
+
+ default:
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+ }
+
+ wxTheClipboard->m_formatSupported = TRUE;
+ clipboard->m_waiting = FALSE;
}
-void wxDoneClipboard()
+//-----------------------------------------------------------------------------
+// "selection_clear"
+//-----------------------------------------------------------------------------
+
+static gint
+selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = (wxClipboard*) NULL;
+ if (!wxTheClipboard) return TRUE;
+
+ if (event->selection == GDK_SELECTION_PRIMARY)
+ {
+ wxTheClipboard->m_ownsPrimarySelection = FALSE;
+ }
+ else
+ if (event->selection == g_clipboardAtom)
+ {
+ wxTheClipboard->m_ownsClipboard = FALSE;
+ }
+ 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 delete clipboard data. */
+ if (wxTheClipboard->m_dataBroker)
+ {
+ delete wxTheClipboard->m_dataBroker;
+ wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL;
+ }
+ }
+
+ wxTheClipboard->m_waiting = FALSE;
+ return TRUE;
}
//-----------------------------------------------------------------------------
-// "selection_received"
+// selection handler for supplying data
//-----------------------------------------------------------------------------
-/*
-static void selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointer data )
+static void
+selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
{
+ if (!wxTheClipboard) return;
+
+ if (!wxTheClipboard->m_dataBroker) return;
+
+ wxNode *node = wxTheClipboard->m_dataBroker->m_dataObjects.First();
+
+ while (node)
+ {
+ wxDataObject *data_object = (wxDataObject *)node->Data();
+
+ if (data_object->GetFormat().GetAtom() != selection_data->target)
+ {
+ node = node->Next();
+ continue;
+ }
+
+ switch (data_object->GetFormat().GetType())
+ {
+ case wxDF_TEXT:
+ {
+ wxTextDataObject *text_object = (wxTextDataObject*) data_object;
+
+ wxString text = text_object->GetText();
+
+#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*) (const char*) s,
+ len );
+
+ break;
+ }
+
+ case wxDF_BITMAP:
+ {
+ // wxBitmapDataObject *private_object = (wxBitmapDataObject*) data_object;
+
+ // how do we do that ?
+
+ break;
+ }
+
+ case wxDF_PRIVATE:
+ {
+ wxPrivateDataObject *private_object = (wxPrivateDataObject*) data_object;
+
+ 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->GetSize() );
+ }
+
+ default:
+ break;
+ }
+
+ node = node->Next();
+ }
}
-*/
//-----------------------------------------------------------------------------
// wxClipboard
wxClipboard::wxClipboard()
{
- m_data = (wxDataObject*)NULL;
- m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
- gtk_widget_realize( m_clipboardWidget );
+ m_open = FALSE;
+
+ m_ownsClipboard = FALSE;
+ m_ownsPrimarySelection = FALSE;
+
+ 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_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
+
+ m_formatSupported = FALSE;
+ m_targetRequested = 0;
+
+ m_usePrimary = FALSE;
}
wxClipboard::~wxClipboard()
{
- if (m_data) delete m_data;
- if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+ Clear();
+
+ if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+ if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
}
-void wxClipboard::SetData( wxDataObject *data )
+void wxClipboard::Clear()
{
- if (m_data) delete m_data;
- m_data = data;
+ if (m_dataBroker)
+ {
+ /* 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();
+ }
+
+ if (m_dataBroker)
+ {
+ delete m_dataBroker;
+ m_dataBroker = (wxDataBroker*) NULL;
+ }
+ }
+
+ m_targetRequested = 0;
+
+ m_formatSupported = FALSE;
}
-void *wxClipboard::GetData( wxDataFormat format, size_t *length )
+bool wxClipboard::Open()
{
- if (!IsAvailable(format))
- {
- if (length) *length = 0;
- return NULL;
- }
- return NULL;
+ wxCHECK_MSG( !m_open, FALSE, _T("clipboard already open") );
+
+ m_open = TRUE;
+
+ return TRUE;
}
-bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) )
+bool wxClipboard::SetData( wxDataObject *data )
{
- return FALSE;
+ wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
+
+ wxCHECK_MSG( data, FALSE, _T("data is invalid") );
+
+ Clear();
+
+ return AddData( data );
}
+
+bool wxClipboard::AddData( wxDataObject *data )
+{
+ wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
+
+ 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();
+
+ wxCHECK_MSG( format, FALSE, _T("data has invalid format") );
+
+ /* This should happen automatically, but to be on the safe side */
+ m_ownsClipboard = FALSE;
+ m_ownsPrimarySelection = FALSE;
+
+ /* 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,
+ format,
+ selection_handler,
+ (gpointer) NULL );
+
+ gtk_selection_add_handler( m_clipboardWidget,
+ GDK_SELECTION_PRIMARY,
+ format,
+ selection_handler,
+ (gpointer) NULL );
+#endif
+
+ /* Tell the world we offer clipboard data */
+ if (!gtk_selection_owner_set( m_clipboardWidget,
+ g_clipboardAtom,
+ GDK_CURRENT_TIME ))
+ {
+ return FALSE;
+ }
+ m_ownsClipboard = TRUE;
+
+ if (!gtk_selection_owner_set( m_clipboardWidget,
+ GDK_SELECTION_PRIMARY,
+ GDK_CURRENT_TIME ))
+ {
+ return FALSE;
+ }
+ m_ownsPrimarySelection = TRUE;
+
+ return TRUE;
+}
+
+void wxClipboard::Close()
+{
+ wxCHECK_RET( m_open, _T("clipboard not open") );
+
+ m_open = FALSE;
+}
+
+bool wxClipboard::IsSupported( wxDataFormat format )
+{
+ wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
+
+ /* 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.
+ 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 );
+
+ while (m_waiting) gtk_main_iteration();
+
+ if (!m_formatSupported) return FALSE;
+
+ return TRUE;
+}
+
+bool wxClipboard::GetData( wxDataObject *data )
+{
+ wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
+
+ /* is data supported by clipboard ? */
+
+ if (!IsSupported( data->GetFormat() )) return FALSE;
+
+ /* store pointer to data object to be filled up by callbacks */
+
+ 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;
+
+ /* 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,
+ m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom,
+ m_targetRequested,
+ GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+
+ /* this is a true error as we checked for the presence of such data before */
+
+ wxCHECK_MSG( m_formatSupported, FALSE, _T("error retrieving data from clipboard") );
+
+ return TRUE;
+}
+
+//-----------------------------------------------------------------------------
+// wxClipboardModule
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
+
+bool wxClipboardModule::OnInit()
+{
+ wxTheClipboard = new wxClipboard();
+
+ return TRUE;
+}
+
+void wxClipboardModule::OnExit()
+{
+ if (wxTheClipboard) delete wxTheClipboard;
+ wxTheClipboard = (wxClipboard*) NULL;
+}
+
+#endif
+
+ // wxUSE_CLIPBOARD
+
projects / wxWidgets.git / blobdiff