X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0d2a2b601b1994333886dff8f53d82a714c4042f..e5a573a28b2f14a4c6669cf03294302d4a9baa63:/src/gtk1/clipbrd.cpp?ds=inline diff --git a/src/gtk1/clipbrd.cpp b/src/gtk1/clipbrd.cpp index 11096c3a4c..c5f0f8d6fa 100644 --- a/src/gtk1/clipbrd.cpp +++ b/src/gtk1/clipbrd.cpp @@ -1,40 +1,60 @@ ///////////////////////////////////////////////////////////////////////////// -// 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 "glib.h" -#include "gdk/gdk.h" -#include "gtk/gtk.h" +#include "wx/dataobj.h" +#include "wx/utils.h" +#include "wx/log.h" + +#include +#include +#include //----------------------------------------------------------------------------- -// data +// thread system //----------------------------------------------------------------------------- -wxClipboard *wxTheClipboard = (wxClipboard*) NULL; +#if wxUSE_THREADS +#endif + +//----------------------------------------------------------------------------- +// data +//----------------------------------------------------------------------------- -GdkAtom g_textAtom = 0; 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. + 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 @@ -47,9 +67,9 @@ struct _GtkSelectionData GdkAtom selection; GdkAtom target; GdkAtom type; - gint format; + gint format; guchar *data; - gint length; + gint length; }; */ @@ -59,98 +79,115 @@ struct _GtkSelectionData //----------------------------------------------------------------------------- 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; ilength/sizeof(GdkAtom); i++) + if ( wxTheClipboard && selection_data->length > 0 ) { - if (atoms[i] == clipboard->m_targetRequested) + // make sure we got the data in the correct form + GdkAtom type = selection_data->type; + if ( type != GDK_SELECTION_TYPE_ATOM ) { - clipboard->m_formatSupported = TRUE; - return; + 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; ilength/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; + } } } - return; + clipboard->m_waiting = FALSE; } //----------------------------------------------------------------------------- // "selection_received" for the actual data //----------------------------------------------------------------------------- -static void -selection_received( GtkWidget *WXUNUSED(widget), - GtkSelectionData *selection_data, - wxClipboard *clipboard ) +static void +selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, + guint32 WXUNUSED(time), + wxClipboard *clipboard ) { - if (!wxTheClipboard) return; - + if (!wxTheClipboard) + { + clipboard->m_waiting = FALSE; + return; + } + wxDataObject *data_object = clipboard->m_receivedData; - - if (!data_object) return; - - if (selection_data->length <= 0) return; - + + 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) return; - + 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 - - switch (data_object->GetFormat().GetType()) + if (selection_data->type != GDK_SELECTION_TYPE_STRING) { - case wxDF_TEXT: - { - if (selection_data->type != GDK_SELECTION_TYPE_STRING) 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) return; - - return; - - break; - } - - case wxDF_PRIVATE: - { - if (selection_data->type != GDK_SELECTION_TYPE_STRING) return; - - wxPrivateDataObject *private_object = (wxPrivateDataObject *) data_object; - - private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length ); - - break; - } - - default: - { - return; - } + 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; } //----------------------------------------------------------------------------- @@ -161,7 +198,7 @@ static gint selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) { if (!wxTheClipboard) return TRUE; - + if (event->selection == GDK_SELECTION_PRIMARY) { wxTheClipboard->m_ownsPrimarySelection = FALSE; @@ -173,21 +210,24 @@ 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; } @@ -196,74 +236,64 @@ 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(); + + if (!wxTheClipboard->m_data) return; + + wxDataObject *data = wxTheClipboard->m_data; + + wxDataFormat format( selection_data->target ); + +#ifdef __WXDEBUG__ + wxLogTrace(TRACE_CLIPBOARD, + _T("clipboard data in format %s, GtkSelectionData is target=%s type=%s selection=%s"), + 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() + ); +#endif - while (node) + 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 ); + +#ifdef __WXGTK20__ + // NB: GTK+ requires special treatment of UTF8_STRING data, the text + // would show as UTF-8 data interpreted as latin1 (?) in other + // GTK+ apps if we used gtk_selection_data_set() + if (format == wxDataFormat(wxDF_UNICODETEXT)) { - 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(); - - char *s = WXSTRINGCAST text; - int len = (int) text.Length(); - - gtk_selection_data_set( - selection_data, - GDK_SELECTION_TYPE_STRING, - 8*sizeof(gchar), - (unsigned 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_text( + selection_data, + (const gchar*)d, + size); } + else +#endif + { + gtk_selection_data_set( + selection_data, + GDK_SELECTION_TYPE_STRING, + 8*sizeof(gchar), + (unsigned char*) d, + size ); + } + + free(d); } //----------------------------------------------------------------------------- @@ -275,231 +305,336 @@ IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject) wxClipboard::wxClipboard() { m_open = FALSE; + m_waiting = FALSE; 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), + "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), + 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 ); - + 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() { - Clear(); - + Clear(); + if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget ); + if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget ); } void wxClipboard::Clear() { - 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 (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) { - 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_dataBroker) - { - delete m_dataBroker; - m_dataBroker = (wxDataBroker*) NULL; - } + + 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, "clipboard already open" ); - + wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") ); + m_open = TRUE; - + return TRUE; } -bool wxClipboard::SetData( wxDataBroker *data ) +bool wxClipboard::SetData( wxDataObject *data ) { - wxCHECK_MSG( data, FALSE, "data is invalid" ); - + wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") ); + + wxCHECK_MSG( data, FALSE, wxT("data is invalid") ); + Clear(); - - m_dataBroker = data; - - if (!m_dataBroker) return FALSE; - - wxCHECK_MSG( m_open, FALSE, "clipboard not open" ); - - wxNode *node = m_dataBroker->m_dataObjects.First(); - while (node) + + 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++) { - wxDataObject *dobj = (wxDataObject*)node->Data(); - - GdkAtom format = dobj->GetFormat().GetAtom(); - - if (format != (GdkAtom) 0) - { - /* This should happen automatically */ - - m_ownsClipboard = FALSE; - m_ownsPrimarySelection = FALSE; - - /* Add handlers if someone requests data */ - - 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 ); - - /* 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; - } - - node = node->Next(); + 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 ? */ } - - return TRUE; + + 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, "clipboard not open" ); - + wxCHECK_RET( m_open, wxT("clipboard not open") ); + m_open = FALSE; } -bool wxClipboard::GetData( wxDataObject *data ) +bool wxClipboard::IsOpened() const { - wxCHECK_MSG( m_open, FALSE, "clipboard not open" ); - - m_receivedData = data; - - wxCHECK_MSG( m_receivedData, FALSE, "invalid data object" ); - - /* STEP ONE: check if there is such data in the clipboard */ - - m_targetRequested = data->GetFormat().GetAtom(); - - wxCHECK_MSG( m_targetRequested, FALSE, "invalid clipboard format" ); - - if (m_targetRequested == 0) return FALSE; - - /* add handler for target (= format) query */ + return m_open; +} + +bool wxClipboard::IsSupported( const wxDataFormat& format ) +{ + /* reentrance problems */ + if (m_waiting) return FALSE; + + /* store requested format to be asked for by callbacks */ + m_targetRequested = format; + + wxLogTrace( TRACE_CLIPBOARD, + wxT("wxClipboard:IsSupported: requested format: %s"), + format.GetId().c_str() ); + + wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") ); - gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), - "selection_received", - GTK_SIGNAL_FUNC( targets_selection_received ), - (gpointer) this ); - - m_formatSupported = FALSE; - - /* perform query. this will set m_formatSupported to - * TRUE if m_targetRequested is supported */ - - 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; - - /* STEP TWO: get the data from the clipboard */ - m_formatSupported = 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 ); - - /* this is a true error as we checked for the presence of such data before */ - - wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" ); - - return TRUE; -} -//----------------------------------------------------------------------------- -// wxClipboardModule -//----------------------------------------------------------------------------- + /* 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 */ -IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule) + m_waiting = TRUE; -bool wxClipboardModule::OnInit() -{ - wxTheClipboard = new wxClipboard(); - - return 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 + + 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(); + + /* 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