/////////////////////////////////////////////////////////////////////////////
-// Name: clipbrd.cpp
+// Name: gtk/clipbrd.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "clipbrd.h"
#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
#include "wx/clipbrd.h"
+#if wxUSE_CLIPBOARD
+
+#include "wx/dataobj.h"
+#include "wx/utils.h"
+#include "wx/log.h"
+
+#include <glib.h>
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
+//-----------------------------------------------------------------------------
+// thread system
+//-----------------------------------------------------------------------------
+
+#if wxUSE_THREADS
+#endif
+
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
-wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
+GdkAtom g_clipboardAtom = 0;
+GdkAtom g_targetsAtom = 0;
+
+#if defined(__WXGTK20__) && wxUSE_UNICODE
+extern GdkAtom g_altTextAtom;
+#endif
+
+// the trace mask we use with wxLogTrace() - call
+// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
+// (there will be a *lot* of them!)
+static const wxChar *TRACE_CLIPBOARD = _T("clipboard");
+
+//-----------------------------------------------------------------------------
+// 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;
+};
+
+*/
//-----------------------------------------------------------------------------
-// functions
+// "selection_received" for targets
//-----------------------------------------------------------------------------
-void wxInitClipboard()
+static void
+targets_selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint32 WXUNUSED(time),
+ wxClipboard *clipboard )
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = new wxClipboard();
+ if ( wxTheClipboard && selection_data->length > 0 )
+ {
+ // make sure we got the data in the correct form
+ GdkAtom type = selection_data->type;
+ if ( type != GDK_SELECTION_TYPE_ATOM )
+ {
+ if ( strcmp(gdk_atom_name(type), "TARGETS") )
+ {
+ wxLogTrace( TRACE_CLIPBOARD,
+ _T("got unsupported clipboard target") );
+
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+ }
+
+#ifdef __WXDEBUG__
+ wxDataFormat clip( selection_data->selection );
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("selection received for targets, clipboard %s"),
+ clip.GetId().c_str() );
+#endif // __WXDEBUG__
+
+ // 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++)
+ {
+ wxDataFormat format( atoms[i] );
+
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("selection received for targets, format %s"),
+ format.GetId().c_str() );
+
+// printf( "format %s requested %s\n",
+// gdk_atom_name( atoms[i] ),
+// gdk_atom_name( clipboard->m_targetRequested ) );
+
+ if (format == clipboard->m_targetRequested)
+ {
+ clipboard->m_waiting = FALSE;
+ clipboard->m_formatSupported = TRUE;
+ return;
+ }
+ }
+ }
+
+ clipboard->m_waiting = FALSE;
+}
+
+//-----------------------------------------------------------------------------
+// "selection_received" for the actual data
+//-----------------------------------------------------------------------------
+
+static void
+selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint32 WXUNUSED(time),
+ wxClipboard *clipboard )
+{
+ 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;
+ }
+
+ wxDataFormat format( selection_data->target );
+
+ // make sure we got the data in the correct format
+ if (!data_object->IsSupportedFormat( format ) )
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+#if 0
+ This seems to cause problems somehow
+ // make sure we got the data in the correct form (selection type).
+ // if so, copy data to target object
+ if (selection_data->type != GDK_SELECTION_TYPE_STRING)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+#endif
+
+ data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
+
+ 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_data)
+ {
+ wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));
+
+ delete wxTheClipboard->m_data;
+ wxTheClipboard->m_data = (wxDataObject*) 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,
+ guint WXUNUSED(info),
+ guint WXUNUSED(time),
+ gpointer WXUNUSED(data) )
{
+ if (!wxTheClipboard) return;
+
+ if (!wxTheClipboard->m_data) return;
+
+ wxDataObject *data = wxTheClipboard->m_data;
+
+ wxDataFormat format( selection_data->target );
+
+ if (!data->IsSupportedFormat( format )) return;
+
+ int size = data->GetDataSize( format );
+
+ if (size == 0) return;
+
+ void *d = malloc(size);
+
+ // Text data will be in UTF8 in Unicode mode.
+ data->GetDataHere( selection_data->target, d );
+
+ gtk_selection_data_set(
+ selection_data,
+ GDK_SELECTION_TYPE_STRING,
+ 8*sizeof(gchar),
+ (unsigned char*) d,
+ size );
+
+ free(d);
}
-*/
//-----------------------------------------------------------------------------
// wxClipboard
wxClipboard::wxClipboard()
{
- m_data = (wxDataObject*)NULL;
- m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
- gtk_widget_realize( m_clipboardWidget );
+ m_open = FALSE;
+ m_waiting = FALSE;
+
+ m_ownsClipboard = FALSE;
+ m_ownsPrimarySelection = FALSE;
+
+ m_data = (wxDataObject*) 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::Clear()
+{
+ if (m_data)
+ {
+#if wxUSE_THREADS
+ /* disable GUI threads */
+#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,
+ (guint32) 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,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+ }
+
+ if (m_data)
+ {
+ delete m_data;
+ m_data = (wxDataObject*) NULL;
+ }
+
+#if wxUSE_THREADS
+ /* re-enable GUI threads */
+#endif
+ }
+
+ 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
+ Clear();
+
+ m_data = data;
+
+ // get formats from wxDataObjects
+ wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
+ m_data->GetAllFormats( array );
+
+ // primary selection or clipboard
+ GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom;
+
+
+ for (size_t i = 0; i < m_data->GetFormatCount(); i++)
+ {
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard now supports atom %s"),
+ array[i].GetId().c_str() );
+
+// printf( "added %s\n",
+// gdk_atom_name( array[i].GetFormatId() ) );
+
+ gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
+ clipboard,
+ array[i],
+ 0 ); /* what is info ? */
+ }
+
+ delete[] array;
+
+ gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ "selection_get",
+ GTK_SIGNAL_FUNC(selection_handler),
+ (gpointer) NULL );
+
+#if wxUSE_THREADS
+ /* disable GUI threads */
+#endif
+
+ /* Tell the world we offer clipboard data */
+ bool res = (gtk_selection_owner_set( m_clipboardWidget,
+ clipboard,
+ (guint32) GDK_CURRENT_TIME ));
+
+ if (m_usePrimary)
+ m_ownsPrimarySelection = res;
+ else
+ m_ownsClipboard = res;
+
+#if wxUSE_THREADS
+ /* re-enable GUI threads */
+#endif
+
+ return res;
+}
+
+void wxClipboard::Close()
+{
+ wxCHECK_RET( m_open, wxT("clipboard not open") );
+
+ m_open = FALSE;
}
-void wxClipboard::SetData( wxDataObject *data )
+bool wxClipboard::IsOpened() const
{
- if (m_data) delete m_data;
- m_data = data;
+ return m_open;
}
-void *wxClipboard::GetData( wxDataFormat format, size_t *length )
+bool wxClipboard::IsSupported( const wxDataFormat& format )
{
- if (!IsAvailable(format))
- {
- if (length) *length = 0;
- return NULL;
- }
- return NULL;
+ /* reentrance problems */
+ if (m_waiting) return FALSE;
+
+ /* store requested format to be asked for by callbacks */
+ m_targetRequested = format;
+
+#if 0
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard:IsSupported: requested format: %s"),
+ format.GetId().c_str() );
+#endif
+
+ wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
+
+ m_formatSupported = FALSE;
+
+ /* perform query. 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_targetsWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+
+#if defined(__WXGTK20__) && wxUSE_UNICODE
+ if (!m_formatSupported && format == wxDataFormat(wxDF_UNICODETEXT))
+ {
+ // Another try with plain STRING format
+ extern GdkAtom g_altTextAtom;
+ return IsSupported(g_altTextAtom);
+ }
+#endif
+
+ if (!m_formatSupported) return FALSE;
+
+ return TRUE;
}
-bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) )
+bool wxClipboard::GetData( wxDataObject& data )
{
- return FALSE;
+ wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
+
+ /* get formats from wxDataObjects */
+ wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
+ data.GetAllFormats( array );
+
+ for (size_t i = 0; i < data.GetFormatCount(); i++)
+ {
+ wxDataFormat format( array[i] );
+
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard::GetData: requested format: %s"),
+ format.GetId().c_str() );
+
+ /* is data supported by clipboard ? */
+
+ /* store requested format to be asked for by callbacks */
+ m_targetRequested = format;
+
+ wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
+
+ m_formatSupported = FALSE;
+
+ /* perform query. 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_targetsWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+
+ if (!m_formatSupported) continue;
+
+ /* 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 = format;
+
+ wxCHECK_MSG( m_targetRequested, FALSE, wxT("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;
+
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard::GetData: format found, start convert") );
+
+ gtk_selection_convert( m_clipboardWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ m_targetRequested,
+ (guint32) 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, wxT("error retrieving data from clipboard") );
+
+ /* return success */
+ delete[] array;
+ return TRUE;
+ }
+
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard::GetData: format not found") );
+
+ /* return failure */
+ delete[] array;
+ return FALSE;
}
+
+#endif
+ // wxUSE_CLIPBOARD
+
projects / wxWidgets.git / blobdiff