/////////////////////////////////////////////////////////////////////////////
-// Name: clipbrd.cpp
+// Name: src/gtk1/clipbrd.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "clipbrd.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#if wxUSE_CLIPBOARD
#include "wx/clipbrd.h"
+#ifndef WX_PRECOMP
+ #include "wx/log.h"
+ #include "wx/utils.h"
+ #include "wx/dataobj.h"
+#endif
+
+#include <glib.h>
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
-wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
-
-GdkAtom g_textAtom = 0;
GdkAtom g_clipboardAtom = 0;
GdkAtom g_targetsAtom = 0;
+GdkAtom g_timestampAtom = 0;
+
+// 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!)
+#define TRACE_CLIPBOARD "clipboard"
//-----------------------------------------------------------------------------
// reminder
//-----------------------------------------------------------------------------
/* The contents of a selection are returned in a GtkSelectionData
- structure. selection/target identify the request.
+ 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
GdkAtom selection;
GdkAtom target;
GdkAtom type;
- gint format;
+ gint format;
guchar *data;
- gint length;
+ gint length;
};
*/
// "selection_received" for targets
//-----------------------------------------------------------------------------
+extern "C" {
static void
-targets_selection_received( GtkWidget *WXUNUSED(widget),
- GtkSelectionData *selection_data,
- wxClipboard *clipboard )
+targets_selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint32 WXUNUSED(time),
+ wxClipboard *clipboard )
{
- 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;
+ 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 )
+ {
+ gchar* atom_name = gdk_atom_name(type);
+ if ( strcmp(atom_name, "TARGETS") )
+ {
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("got unsupported clipboard target") );
+
+ clipboard->m_waiting = false;
+ g_free(atom_name);
+ return;
+ }
+ g_free(atom_name);
+ }
+
+ wxDataFormat clip( selection_data->selection );
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("selection received for targets, clipboard %s"),
+ clip.GetId().c_str() );
+
+ // 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,
- wxClipboard *clipboard )
+extern "C" {
+static void
+selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint32 WXUNUSED(time),
+ 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);
+ 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;
+}
}
//-----------------------------------------------------------------------------
// "selection_clear"
//-----------------------------------------------------------------------------
+extern "C" {
static gint
-selection_clear( GtkWidget *WXUNUSED(widget), GdkEventSelection *WXUNUSED(event) )
+selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
- 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;
+ 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 = NULL;
+ }
+ }
+
+ wxTheClipboard->m_waiting = false;
+ return TRUE;
+}
}
//-----------------------------------------------------------------------------
// selection handler for supplying data
//-----------------------------------------------------------------------------
+extern "C" {
static void
-selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
+selection_handler( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint WXUNUSED(info),
+ guint WXUNUSED(time),
+ gpointer signal_data )
{
- if (!wxTheClipboard) return;
-
- wxDataObject *data_object = wxTheClipboard->m_data;
-
- if (!data_object) return;
-
- if (data_object->GetDataSize() == 0) return;
-
-
-
- gint len = data_object->GetDataSize();
- guchar *bin_data = (guchar*) malloc( len );
- data_object->GetDataHere( (void*)bin_data );
-
- if (selection_data->target == GDK_TARGET_STRING)
- {
- 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 );
- }
-*/
- free( bin_data );
+ if (!wxTheClipboard) return;
+
+ if (!wxTheClipboard->m_data) return;
+
+ wxDataObject *data = wxTheClipboard->m_data;
+
+ // ICCCM says that TIMESTAMP is a required atom.
+ // In particular, it satisfies Klipper, which polls
+ // TIMESTAMP to see if the clipboards content has changed.
+ // It shall return the time which was used to set the data.
+ if (selection_data->target == g_timestampAtom)
+ {
+ guint timestamp = GPOINTER_TO_UINT (signal_data);
+ gtk_selection_data_set(selection_data,
+ GDK_SELECTION_TYPE_INTEGER,
+ 32,
+ (guchar*)&(timestamp),
+ sizeof(timestamp));
+ wxLogTrace(TRACE_CLIPBOARD,
+ wxT("Clipboard TIMESTAMP requested, returning timestamp=%u"),
+ timestamp);
+ return;
+ }
+
+ wxDataFormat format( selection_data->target );
+
+ wxLogTrace(TRACE_CLIPBOARD,
+ wxT("clipboard data in format %s, GtkSelectionData is target=%s type=%s selection=%s timestamp=%u"),
+ format.GetId().c_str(),
+ wxString::FromAscii(gdk_atom_name(selection_data->target)).c_str(),
+ wxString::FromAscii(gdk_atom_name(selection_data->type)).c_str(),
+ wxString::FromAscii(gdk_atom_name(selection_data->selection)).c_str(),
+ GPOINTER_TO_UINT( signal_data )
+ );
+
+ 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()
{
- m_data = (wxDataObject*) NULL;
-
- 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 ),
- (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_receivedData = (char*)NULL;
- m_receivedSize = 0;
- m_formatSupported = FALSE;
- m_targetRequested = 0;
+ m_open = false;
+ m_waiting = false;
+
+ m_ownsClipboard = false;
+ m_ownsPrimarySelection = false;
+
+ m_data = NULL;
+ m_receivedData = 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);
+ if (!g_timestampAtom) g_timestampAtom = gdk_atom_intern ("TIMESTAMP", FALSE);
+
+ m_formatSupported = false;
+ m_targetRequested = 0;
}
wxClipboard::~wxClipboard()
{
- Clear();
-
- 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()
{
- /* 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)
+ if (m_data)
{
- gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
+#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( 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( NULL, GDK_SELECTION_PRIMARY,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+ }
+
+ if (m_data)
+ {
+ delete m_data;
+ m_data = NULL;
+ }
+
+#if wxUSE_THREADS
+ /* re-enable GUI threads */
+#endif
}
-
- delete m_data;
- m_data = (wxDataObject*) NULL;
- }
-
- m_receivedSize = 0;
-
- if (m_receivedData)
- {
- delete[] m_receivedData;
- m_receivedData = (char*) NULL;
- }
-
- m_targetRequested = 0;
-
- m_formatSupported = FALSE;
+
+ m_targetRequested = 0;
+ m_formatSupported = false;
}
-void wxClipboard::SetData( wxDataObject *data )
+bool wxClipboard::Open()
{
- 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.
-*/
+ wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
- 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 (!gtk_selection_owner_set( m_clipboardWidget,
- g_clipboardAtom,
- GDK_CURRENT_TIME))
- {
- delete m_data;
- m_data = (wxDataObject*) NULL;
- return;
- }
-
- switch (m_data->GetPreferredFormat())
- {
- case wxDF_TEXT:
- gtk_selection_add_handler( m_clipboardWidget,
- g_clipboardAtom,
- // g_textAtom,
- GDK_TARGET_STRING,
- selection_handler,
- NULL );
- break;
- default:
- break;
- }
+ m_open = true;
+
+ return true;
}
-bool wxClipboard::IsSupportedFormat( wxDataFormat format )
+bool wxClipboard::SetData( wxDataObject *data )
{
- 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;
+ wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
+
+ wxCHECK_MSG( data, false, wxT("data is invalid") );
+
+ Clear();
+
+ return AddData( data );
}
-bool wxClipboard::ObtainData( wxDataFormat format )
+bool wxClipboard::AddData( wxDataObject *data )
{
- m_receivedSize = 0;
-
- if (m_receivedData)
- {
- delete[] m_receivedData;
- m_receivedData = (char*) NULL;
- }
-
- 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( 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;
+ 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;
+
+ // by default provide TIMESTAMP as a target
+ gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
+ clipboard,
+ g_timestampAtom,
+ 0 );
+
+ 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),
+ GUINT_TO_POINTER( gdk_event_get_time(gtk_get_current_event()) ) );
+
+#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;
}
-size_t wxClipboard::GetDataSize() const
+void wxClipboard::Close()
{
- return m_receivedSize;
+ wxCHECK_RET( m_open, wxT("clipboard not open") );
+
+ m_open = false;
}
-void wxClipboard::GetDataHere( void *data ) const
+bool wxClipboard::IsOpened() const
{
- memcpy(data, m_receivedData, m_receivedSize );
+ return m_open;
}
-//-----------------------------------------------------------------------------
-// wxClipboardModule
-//-----------------------------------------------------------------------------
+bool wxClipboard::IsSupported( const wxDataFormat& format )
+{
+ /* reentrance problems */
+ if (m_waiting) return false;
-IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
+ /* store requested format to be asked for by callbacks */
+ m_targetRequested = format;
-bool wxClipboardModule::OnInit()
-{
- wxTheClipboard = new wxClipboard();
-
- return TRUE;
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard:IsSupported: requested format: %s"),
+ format.GetId().c_str() );
+
+ 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();
+
+ return m_formatSupported;
}
-void wxClipboardModule::OnExit()
+bool wxClipboard::GetData( wxDataObject& data )
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = (wxClipboard*) NULL;
+ 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();
+
+ /*
+ 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. In 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 special 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 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