X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/aeeb6a44d137741e69f714566780dc5ba2699f81..c08ee0349dd4ed6d62f734fe576e47c7027e2b9e:/src/gtk/clipbrd.cpp diff --git a/src/gtk/clipbrd.cpp b/src/gtk/clipbrd.cpp index f220a49abd..92cc30b090 100644 --- a/src/gtk/clipbrd.cpp +++ b/src/gtk/clipbrd.cpp @@ -1,34 +1,51 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: clipbrd.cpp +// Name: src/gtk/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" +#endif + +#include "wx/dataobj.h" + +#include "wx/gtk/private.h" + //----------------------------------------------------------------------------- // data //----------------------------------------------------------------------------- -wxClipboard *wxTheClipboard = (wxClipboard*) NULL; - -GdkAtom g_textAtom = 0; GdkAtom g_clipboardAtom = 0; GdkAtom g_targetsAtom = 0; +GdkAtom g_timestampAtom = 0; + +#if 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 @@ -41,9 +58,9 @@ struct _GtkSelectionData GdkAtom selection; GdkAtom target; GdkAtom type; - gint format; + gint format; guchar *data; - gint length; + gint length; }; */ @@ -52,207 +69,247 @@ struct _GtkSelectionData // "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; 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 ) + { + if ( strcmp(wxGtkString(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++) { - clipboard->m_formatSupported = TRUE; - return; + 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 ) +extern "C" { +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->m_formatAtom != 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()) + 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; } - - wxTheClipboard->m_formatSupported = TRUE; +#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_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) { - if (!wxTheClipboard) return TRUE; - + if (!wxTheClipboard) return true; + if (event->selection == GDK_SELECTION_PRIMARY) { - wxTheClipboard->m_ownsPrimarySelection = FALSE; + wxTheClipboard->m_ownsPrimarySelection = false; } else if (event->selection == g_clipboardAtom) { - wxTheClipboard->m_ownsClipboard = FALSE; + 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 - // clipboard data. - - wxTheClipboard->m_dataObjects.Clear(); + /* 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 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; - - wxNode *node = wxTheClipboard->m_dataObjects.First(); - - while (node) + + 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) { - wxDataObject *data_object = (wxDataObject *)node->Data(); - - if (data_object->m_formatAtom != selection_data->target) - { - node = node->Next(); - break; - } - - switch (data_object->GetFormat()) - { - 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->GetDataSize() == 0) return; - - gtk_selection_data_set( - selection_data, - GDK_SELECTION_TYPE_STRING, - 8*sizeof(gchar), - (unsigned char*) private_object->GetData(), - (int) private_object->GetDataSize() ); - } - - default: - break; - } - - node = node->Next(); + 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, + _T("Clipboard TIMESTAMP requested, returning timestamp=%u"), + timestamp); + return; } + + wxDataFormat format( selection_data->target ); + +#ifdef __WXDEBUG__ + wxLogTrace(TRACE_CLIPBOARD, + _T("clipboard data in format %s, GtkSelectionData is target=%s type=%s selection=%s timestamp=%u"), + format.GetId().c_str(), + wxString::FromAscii(wxGtkString(gdk_atom_name(selection_data->target))).c_str(), + wxString::FromAscii(wxGtkString(gdk_atom_name(selection_data->type))).c_str(), + wxString::FromAscii(wxGtkString(gdk_atom_name(selection_data->selection))).c_str(), + GPOINTER_TO_UINT( signal_data ) + ); +#endif + + 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 ); + + // 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)) + { + gtk_selection_data_set_text( + selection_data, + (const gchar*)d, + size ); + } + else + { + gtk_selection_data_set( + selection_data, + GDK_SELECTION_TYPE_STRING, + 8*sizeof(gchar), + (unsigned char*) d, + size ); + } + + free(d); +} } //----------------------------------------------------------------------------- @@ -263,283 +320,335 @@ IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject) wxClipboard::wxClipboard() { - m_open = FALSE; + m_open = false; + m_waiting = false; - m_ownsClipboard = FALSE; - m_ownsPrimarySelection = FALSE; + m_ownsClipboard = false; + m_ownsPrimarySelection = false; - m_dataObjects.DeleteContents( TRUE ); - + 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 ); + + g_signal_connect (m_targetsWidget, "selection_received", + G_CALLBACK (targets_selection_received), 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_clear_event", - GTK_SIGNAL_FUNC( selection_clear_clip ), - (gpointer) NULL ); - + g_signal_connect (m_clipboardWidget, "selection_received", + G_CALLBACK (selection_received), this); + + g_signal_connect (m_clipboardWidget, "selection_clear_event", + G_CALLBACK (selection_clear_clip), 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; + if (!g_timestampAtom) g_timestampAtom = gdk_atom_intern ("TIMESTAMP", 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_dataObjects.GetCount()) - { - /* 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(); } - - m_dataObjects.Clear(); + + if (m_data) + { + delete m_data; + m_data = (wxDataObject*) NULL; + } + +#if wxUSE_THREADS + /* re-enable GUI threads */ +#endif } - + m_targetRequested = 0; - - m_formatSupported = FALSE; + m_formatSupported = false; } bool wxClipboard::Open() { - wxCHECK_MSG( !m_open, FALSE, "clipboard already open" ); - - m_open = TRUE; - - return TRUE; + wxCHECK_MSG( !m_open, false, wxT("clipboard already open") ); + + m_open = true; + + return true; } bool wxClipboard::SetData( wxDataObject *data ) { - wxCHECK_MSG( data, FALSE, "data is invalid" ); - - wxNode *node = m_dataObjects.First(); - - while (node) - { - wxDataObject *d = (wxDataObject*)node->Data(); - - if (d->GetFormat() == data->GetFormat()) - { - m_dataObjects.DeleteNode( node ); - - break; - } - - node = node->Next(); - } - - m_dataObjects.Append( data ); - - wxCHECK_MSG( m_open, FALSE, "clipboard not open" ); - - if (data->GetFormat() == wxDF_PRIVATE) + 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; + + // 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++) { - wxPrivateDataObject* pd = (wxPrivateDataObject*) data; - - wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" ); - - data->m_formatAtom = GetTargetAtom( data->GetFormat(), pd->GetId() ); + 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; + + g_signal_connect (m_clipboardWidget, "selection_get", + G_CALLBACK (selection_handler), + GUINT_TO_POINTER (gtk_get_current_event_time()) ); + +#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 - { - data->m_formatAtom = GetTargetAtom( data->GetFormat() ); - } - - // This should happen automatically - - m_ownsClipboard = FALSE; - m_ownsPrimarySelection = FALSE; - - // Add handlers if someone requests data - - gtk_selection_add_handler( m_clipboardWidget, - g_clipboardAtom, - data->m_formatAtom, - selection_handler, - NULL ); - - gtk_selection_add_handler( m_clipboardWidget, - GDK_SELECTION_PRIMARY, - data->m_formatAtom, - selection_handler, - 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; - - return TRUE; + m_ownsClipboard = res; + +#if wxUSE_THREADS + /* re-enable GUI threads */ +#endif + + return res; } void wxClipboard::Close() { - wxCHECK_RET( m_open, "clipboard not open" ); - - m_open = FALSE; + wxCHECK_RET( m_open, wxT("clipboard not open") ); + + m_open = false; } -bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString &id ) +bool wxClipboard::IsOpened() const { - m_targetRequested = GetTargetAtom( format, id ); - - if (m_targetRequested == 0) return FALSE; - - // add handler for target (= format) query - - 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; - - return TRUE; + return m_open; } -bool wxClipboard::GetData( wxDataObject *data ) +bool wxClipboard::IsSupported( const wxDataFormat& format ) { - wxCHECK_MSG( m_open, FALSE, "clipboard not open" ); - - m_receivedData = data; - - wxCHECK_MSG( m_receivedData, FALSE, "invalid data object" ); - - if (m_receivedData->GetFormat() == wxDF_PRIVATE) - { - wxPrivateDataObject* pd = (wxPrivateDataObject*) m_receivedData; - - wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" ); - - m_targetRequested = GetTargetAtom( m_receivedData->GetFormat(), pd->GetId() ); - } - else + /* 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") ); + + 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 wxUSE_UNICODE + if (!m_formatSupported && format == wxDataFormat(wxDF_UNICODETEXT)) { - m_targetRequested = GetTargetAtom( m_receivedData->GetFormat() ); + // Another try with plain STRING format + extern GdkAtom g_altTextAtom; + return IsSupported(g_altTextAtom); } - - data->m_formatAtom = m_targetRequested; - - wxCHECK_MSG( m_targetRequested, FALSE, "unsupported clipboard format" ); - - 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 ); - - wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" ); - - return TRUE; +#endif + + return m_formatSupported; } -GdkAtom wxClipboard::GetTargetAtom( wxDataFormat format, const wxString &id ) +bool wxClipboard::GetData( wxDataObject& data ) { - // What is X representation of that format? - - switch (format) + 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++) { - case wxDF_TEXT: - { - return GDK_TARGET_STRING; - // g_textAtom - } - - case wxDF_BITMAP: - { - return GDK_TARGET_BITMAP; - break; - } - - case wxDF_PRIVATE: - { - // we create our own X representation - - return gdk_atom_intern( WXSTRINGCAST( id ), FALSE ); - } - - default: - { - return (GdkAtom) 0; - } - } - - return (GdkAtom) 0; -} + wxDataFormat format( array[i] ); -//----------------------------------------------------------------------------- -// wxClipboardModule -//----------------------------------------------------------------------------- + wxLogTrace( TRACE_CLIPBOARD, + wxT("wxClipboard::GetData: requested format: %s"), + format.GetId().c_str() ); -IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule) + /* is data supported by clipboard ? */ -bool wxClipboardModule::OnInit() -{ - wxTheClipboard = new wxClipboard(); - - return TRUE; -} + /* store requested format to be asked for by callbacks */ + m_targetRequested = format; -void wxClipboardModule::OnExit() -{ - if (wxTheClipboard) delete wxTheClipboard; - wxTheClipboard = (wxClipboard*) NULL; + 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