X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/93c5dd39af2fb5eb12c5c837999be944543b21b0..d6ddcd574bce0167851aef142be1f9722c694654:/src/gtk/clipbrd.cpp diff --git a/src/gtk/clipbrd.cpp b/src/gtk/clipbrd.cpp index 2d056fc1ed..3188efb475 100644 --- a/src/gtk/clipbrd.cpp +++ b/src/gtk/clipbrd.cpp @@ -1,10 +1,10 @@ ///////////////////////////////////////////////////////////////////////////// -// 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__ @@ -15,27 +15,41 @@ #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" +#include +#include +#include //----------------------------------------------------------------------------- -// data +// thread system //----------------------------------------------------------------------------- -wxClipboard *wxTheClipboard = (wxClipboard*) NULL; +#if wxUSE_THREADS +extern void wxapp_install_thread_wakeup(); +extern void wxapp_uninstall_thread_wakeup(); +#endif + +//----------------------------------------------------------------------------- +// data +//----------------------------------------------------------------------------- GdkAtom g_clipboardAtom = 0; GdkAtom g_targetsAtom = 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!) +static const wxChar *TRACE_CLIPBOARD = _T("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 @@ -48,9 +62,9 @@ struct _GtkSelectionData GdkAtom selection; GdkAtom target; GdkAtom type; - gint format; + gint format; guchar *data; - gint length; + gint length; }; */ @@ -60,146 +74,110 @@ struct _GtkSelectionData //----------------------------------------------------------------------------- static void -targets_selection_received( GtkWidget *WXUNUSED(widget), - GtkSelectionData *selection_data, +targets_selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, #if (GTK_MINOR_VERSION > 0) guint32 WXUNUSED(time), #endif - wxClipboard *clipboard ) + wxClipboard *clipboard ) { - if (!wxTheClipboard) + if ( wxTheClipboard && selection_data->length > 0 ) { - 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; + /* 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") ); - for (unsigned int i=0; ilength/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; + 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; ilength/sizeof(GdkAtom); i++) { - clipboard->m_waiting = FALSE; - clipboard->m_formatSupported = TRUE; - return; + wxDataFormat format( atoms[i] ); + + wxLogTrace( TRACE_CLIPBOARD, + wxT("selection received for targets, format %s"), + format.GetId().c_str() ); + + if (format == clipboard->m_targetRequested) + { + clipboard->m_waiting = FALSE; + clipboard->m_formatSupported = TRUE; + return; + } } } clipboard->m_waiting = FALSE; - return; } //----------------------------------------------------------------------------- // "selection_received" for the actual data //----------------------------------------------------------------------------- -static void -selection_received( GtkWidget *WXUNUSED(widget), - GtkSelectionData *selection_data, +static void +selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, #if (GTK_MINOR_VERSION > 0) guint32 WXUNUSED(time), #endif - wxClipboard *clipboard ) + 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->GetFormat().GetAtom() != selection_data->target) + if (!data_object->IsSupportedFormat( format ) ) { 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()) + if (selection_data->type != GDK_SELECTION_TYPE_STRING) { - 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; - } + clipboard->m_waiting = FALSE; + return; } - + + data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data ); + wxTheClipboard->m_formatSupported = TRUE; clipboard->m_waiting = FALSE; } @@ -212,7 +190,7 @@ static gint selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) { if (!wxTheClipboard) return TRUE; - + if (event->selection == GDK_SELECTION_PRIMARY) { wxTheClipboard->m_ownsPrimarySelection = FALSE; @@ -224,21 +202,24 @@ 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. */ - - if (wxTheClipboard->m_dataBroker) - { - delete wxTheClipboard->m_dataBroker; - wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL; - } + /* 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; } @@ -247,79 +228,59 @@ selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) //----------------------------------------------------------------------------- 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 WXUNUSED(data) ) { if (!wxTheClipboard) return; - - if (!wxTheClipboard->m_dataBroker) return; - - wxNode *node = wxTheClipboard->m_dataBroker->m_dataObjects.First(); - - while (node) + + if (!wxTheClipboard->m_data) return; + + wxDataObject *data = wxTheClipboard->m_data; + + wxDataFormat format( selection_data->target ); + + if (!data->IsSupportedFormat( format )) return; + + /* this will fail for composite formats */ + if (format.GetType() == wxDF_TEXT) { - wxDataObject *data_object = (wxDataObject *)node->Data(); - - if (data_object->GetFormat().GetAtom() != selection_data->target) - { - node = node->Next(); - break; - } - - switch (data_object->GetFormat().GetType()) - { - case wxDF_TEXT: - { - wxTextDataObject *text_object = (wxTextDataObject*) data_object; - - wxString text = text_object->GetText(); - + wxTextDataObject *text_object = (wxTextDataObject*) data; + wxString text( text_object->GetText() ); + #if wxUSE_UNICODE - const wxWX2MBbuf s = text.mbc_str(); - int len = strlen(s); + 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(); + 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(); + gtk_selection_data_set( + selection_data, + GDK_SELECTION_TYPE_STRING, + 8*sizeof(gchar), + (unsigned char*) (const char*) s, + len ); + + return; } + + int size = data->GetDataSize( format ); + + if (size == 0) return; + + char *d = new char[size]; + + data->GetDataHere( selection_data->target, (void*) d ); + + gtk_selection_data_set( + selection_data, + GDK_SELECTION_TYPE_STRING, + 8*sizeof(gchar), + (unsigned char*) d, + size ); } //----------------------------------------------------------------------------- @@ -335,94 +296,113 @@ wxClipboard::wxClipboard() m_ownsClipboard = FALSE; m_ownsPrimarySelection = FALSE; - m_dataBroker = (wxDataBroker*) NULL; - + 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), + gtk_signal_connect( GTK_OBJECT(m_targetsWidget), "selection_received", - GTK_SIGNAL_FUNC( targets_selection_received ), - (gpointer) this ); - + 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), + gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), "selection_received", - GTK_SIGNAL_FUNC( selection_received ), - (gpointer) this ); + GTK_SIGNAL_FUNC( selection_received ), + (gpointer) this ); - gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), + gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), "selection_clear_event", - GTK_SIGNAL_FUNC( selection_clear_clip ), - (gpointer) NULL ); - + 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() { - Clear(); - + Clear(); + if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget ); if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget ); } void wxClipboard::Clear() { - if (m_dataBroker) - { + if (m_data) + { +#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) { - gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME ); + 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) { - gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME ); + 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 (m_dataBroker) - { - delete m_dataBroker; - m_dataBroker = (wxDataBroker*) NULL; - } + +#if wxUSE_THREADS + /* re-enable GUI threads */ + wxapp_install_thread_wakeup(); +#endif } - + m_targetRequested = 0; - m_formatSupported = FALSE; } bool wxClipboard::Open() { - wxCHECK_MSG( !m_open, FALSE, _T("clipboard already 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, _T("clipboard not open") ); - - wxCHECK_MSG( data, FALSE, _T("data is invalid") ); - + wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") ); + + wxCHECK_MSG( data, FALSE, wxT("data is invalid") ); + Clear(); return AddData( data ); @@ -430,193 +410,213 @@ bool wxClipboard::SetData( wxDataObject *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 */ - + wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") ); -#if (GTK_MINOR_VERSION > 0) + 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; - 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), + + for (size_t i = 0; i < m_data->GetFormatCount(); i++) + { + wxLogTrace( TRACE_CLIPBOARD, + wxT("wxClipboard now supports atom %s"), + array[i].GetId().c_str() ); + + 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 ); - -#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 ); + GTK_SIGNAL_FUNC(selection_handler), + (gpointer) NULL ); + +#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 )) - { - 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; + 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 */ + wxapp_install_thread_wakeup(); +#endif + + return res; } void wxClipboard::Close() { - wxCHECK_RET( m_open, _T("clipboard not open") ); - + wxCHECK_RET( m_open, wxT("clipboard not open") ); + m_open = FALSE; } -bool wxClipboard::IsSupported( wxDataFormat format ) +bool wxClipboard::IsOpened() const +{ + return m_open; +} + +bool wxClipboard::IsSupported( const wxDataFormat& format ) { - wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") ); - + /* reentrance problems */ + if (m_waiting) return FALSE; + /* store requested format to be asked for by callbacks */ - - m_targetRequested = format.GetAtom(); - - wxCHECK_MSG( m_targetRequested, FALSE, _T("invalid clipboard format") ); - + 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 + + /* perform query. this will set m_formatSupported to TRUE if m_targetRequested is supported. - alsom we have to wait for the "answer" from the + 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" + until the callback "targets_selection_received" sets it to FALSE */ m_waiting = TRUE; gtk_selection_convert( m_targetsWidget, - g_clipboardAtom, - g_targetsAtom, - GDK_CURRENT_TIME ); + m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY + : g_clipboardAtom, + g_targetsAtom, + (guint32) GDK_CURRENT_TIME ); while (m_waiting) gtk_main_iteration(); - + if (!m_formatSupported) return FALSE; - + return TRUE; -} - -bool wxClipboard::GetData( wxDataObject *data ) +} + +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 */ + wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") ); - m_waiting = TRUE; + /* get formats from wxDataObjects */ + wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ]; + data.GetAllFormats( array ); - gtk_selection_convert( m_clipboardWidget, - g_clipboardAtom, - m_targetRequested, - GDK_CURRENT_TIME ); - - while (m_waiting) gtk_main_iteration(); + for (size_t i = 0; i < data.GetFormatCount(); i++) + { + wxDataFormat format( array[i] ); - /* this is a true error as we checked for the presence of such data before */ + wxLogTrace( TRACE_CLIPBOARD, + wxT("wxClipboard::GetData: requested format: %s"), + format.GetId().c_str() ); - wxCHECK_MSG( m_formatSupported, FALSE, _T("error retrieving data from clipboard") ); - - return TRUE; -} + /* is data supported by clipboard ? */ -//----------------------------------------------------------------------------- -// wxClipboardModule -//----------------------------------------------------------------------------- + /* store requested format to be asked for by callbacks */ + m_targetRequested = format; -IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule) + wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") ); -bool wxClipboardModule::OnInit() -{ - wxTheClipboard = new wxClipboard(); - - return TRUE; -} + m_formatSupported = FALSE; -void wxClipboardModule::OnExit() -{ - if (wxTheClipboard) delete wxTheClipboard; - wxTheClipboard = (wxClipboard*) NULL; + /* 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