X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1dd989e1bf4c3667d27b3c27a9cf64a66484ee90..1e6eb02501673fc46e5e2fc00b17f243e107cc55:/src/gtk/clipbrd.cpp diff --git a/src/gtk/clipbrd.cpp b/src/gtk/clipbrd.cpp index 9a9e38ee22..c5f0f8d6fa 100644 --- a/src/gtk/clipbrd.cpp +++ b/src/gtk/clipbrd.cpp @@ -1,50 +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 "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 //----------------------------------------------------------------------------- // thread system //----------------------------------------------------------------------------- #if wxUSE_THREADS -extern void wxapp_install_thread_wakeup(); -extern void wxapp_uninstall_thread_wakeup(); #endif //----------------------------------------------------------------------------- // data //----------------------------------------------------------------------------- -wxClipboard *wxTheClipboard = (wxClipboard*) NULL; - GdkAtom g_clipboardAtom = 0; GdkAtom g_targetsAtom = 0; +#if defined(__WXGTK20__) && wxUSE_UNICODE +extern GdkAtom g_altTextAtom; +#endif + +// the trace mask we use with wxLogTrace() - call +// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here +// (there will be a *lot* of them!) +static const wxChar *TRACE_CLIPBOARD = _T("clipboard"); + //----------------------------------------------------------------------------- // reminder //----------------------------------------------------------------------------- /* The contents of a selection are returned in a GtkSelectionData - structure. selection/target identify the request. + 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 @@ -57,9 +67,9 @@ struct _GtkSelectionData GdkAtom selection; GdkAtom target; GdkAtom type; - gint format; + gint format; guchar *data; - gint length; + gint length; }; */ @@ -69,71 +79,77 @@ struct _GtkSelectionData //----------------------------------------------------------------------------- static void -targets_selection_received( GtkWidget *WXUNUSED(widget), - GtkSelectionData *selection_data, -#if (GTK_MINOR_VERSION > 0) +targets_selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, guint32 WXUNUSED(time), -#endif - wxClipboard *clipboard ) + wxClipboard *clipboard ) { - if (!wxTheClipboard) - { - 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) + if ( wxTheClipboard && selection_data->length > 0 ) { - 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() ); + +// 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; - return; } //----------------------------------------------------------------------------- // "selection_received" for the actual data //----------------------------------------------------------------------------- -static void -selection_received( GtkWidget *WXUNUSED(widget), - GtkSelectionData *selection_data, -#if (GTK_MINOR_VERSION > 0) +static void +selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, guint32 WXUNUSED(time), -#endif - wxClipboard *clipboard ) + wxClipboard *clipboard ) { if (!wxTheClipboard) { clipboard->m_waiting = FALSE; return; } - + wxDataObject *data_object = clipboard->m_receivedData; if (!data_object) @@ -141,79 +157,35 @@ selection_received( GtkWidget *WXUNUSED(widget), clipboard->m_waiting = FALSE; return; } - + if (selection_data->length <= 0) { clipboard->m_waiting = FALSE; return; } - - /* make sure we got the data in the correct format */ - if (data_object->GetFormat() != selection_data->target) + + 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; } - /* 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 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) { - 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_STRING) - { - clipboard->m_waiting = FALSE; - return; - } - - wxBitmapDataObject *bitmap_object = (wxBitmapDataObject *) data_object; - - bitmap_object->SetPngData( (const void*) selection_data->data, (size_t) selection_data->length ); - - 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; } - +#endif + + data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data ); + wxTheClipboard->m_formatSupported = TRUE; clipboard->m_waiting = FALSE; } @@ -226,7 +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; @@ -241,18 +213,20 @@ selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) 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) - { - delete wxTheClipboard->m_data; - wxTheClipboard->m_data = (wxDataObject*) NULL; - } + { + wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" )); + + delete wxTheClipboard->m_data; + wxTheClipboard->m_data = (wxDataObject*) NULL; + } } - + wxTheClipboard->m_waiting = FALSE; return TRUE; } @@ -262,68 +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_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 - if (!data->IsSupportedFormat( selection_data->target )) return; - - if (data->GetFormat().GetType() == wxDF_TEXT) + 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)) { - wxTextDataObject *text_object = (wxTextDataObject*) data; - wxString text( text_object->GetText() ); - -#if wxUSE_UNICODE - 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(); -#endif - gtk_selection_data_set( - selection_data, - GDK_SELECTION_TYPE_STRING, - 8*sizeof(gchar), - (unsigned char*) (const char*) s, - len ); - - return; + gtk_selection_data_set_text( + selection_data, + (const gchar*)d, + size); } - - if (data->GetFormat().GetType() == wxDF_BITMAP) + else +#endif { - wxBitmapDataObject *bitmap_object = (wxBitmapDataObject*) data; - - if (bitmap_object->GetDataSize(wxDF_BITMAP) == 0) return; - - gtk_selection_data_set( - selection_data, - GDK_SELECTION_TYPE_STRING, - 8*sizeof(gchar), - (unsigned char*) bitmap_object->GetData(), - (int) bitmap_object->GetDataSize(wxDF_BITMAP) ); - - return; + gtk_selection_data_set( + selection_data, + GDK_SELECTION_TYPE_STRING, + 8*sizeof(gchar), + (unsigned char*) d, + size ); } - int size = data->GetDataSize( selection_data->target ); - - 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 ); + free(d); } //----------------------------------------------------------------------------- @@ -335,6 +305,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject) wxClipboard::wxClipboard() { m_open = FALSE; + m_waiting = FALSE; m_ownsClipboard = FALSE; m_ownsPrimarySelection = FALSE; @@ -343,43 +314,43 @@ wxClipboard::wxClipboard() 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 ); } @@ -390,41 +361,41 @@ void wxClipboard::Clear() { #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 */ + + // As we have data we also own the clipboard. Once we no longer own + // it, clear_selection is called which will set m_data to zero if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window) { m_waiting = TRUE; - - gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME ); - + + gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, + (guint32) GDK_CURRENT_TIME ); + while (m_waiting) gtk_main_iteration(); } - + if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window) { m_waiting = TRUE; - - gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME ); - + + 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; - } - + { + delete m_data; + m_data = (wxDataObject*) NULL; + } + #if wxUSE_THREADS /* re-enable GUI threads */ - wxapp_install_thread_wakeup(); #endif } - + m_targetRequested = 0; m_formatSupported = FALSE; } @@ -432,18 +403,18 @@ void wxClipboard::Clear() bool wxClipboard::Open() { wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") ); - + m_open = TRUE; - + return TRUE; } bool wxClipboard::SetData( wxDataObject *data ) { wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") ); - + wxCHECK_MSG( data, FALSE, wxT("data is invalid") ); - + Clear(); return AddData( data ); @@ -452,201 +423,218 @@ bool wxClipboard::SetData( wxDataObject *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 native format id of new data object */ - GdkAtom format = data->GetFormat(); - - wxCHECK_MSG( format, FALSE, wxT("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 */ - -#if (GTK_MINOR_VERSION > 0) - - 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), - "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 ); -#endif + // get formats from wxDataObjects + wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ]; + m_data->GetAllFormats( array ); -#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 )) + // primary selection or clipboard + GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY + : g_clipboardAtom; + + + for (size_t i = 0; i < m_data->GetFormatCount(); i++) { -#if wxUSE_THREADS - /* re-enable GUI threads */ - wxapp_install_thread_wakeup(); -#endif - return FALSE; + 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 ? */ } - m_ownsClipboard = TRUE; - - if (!gtk_selection_owner_set( m_clipboardWidget, - GDK_SELECTION_PRIMARY, - GDK_CURRENT_TIME )) - { + + delete[] array; + + gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), + "selection_get", + GTK_SIGNAL_FUNC(selection_handler), + (gpointer) NULL ); + #if wxUSE_THREADS - /* re-enable GUI threads */ - wxapp_install_thread_wakeup(); + /* disable GUI threads */ #endif - return FALSE; - } - m_ownsPrimarySelection = TRUE; - + + /* 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 */ - wxapp_install_thread_wakeup(); #endif - - return TRUE; + + return res; } void wxClipboard::Close() { 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 ) { + /* 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 + + /* 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, - m_usePrimary ? GDK_SELECTION_PRIMARY : 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 ) + +#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; +} + +bool wxClipboard::GetData( wxDataObject& data ) { wxCHECK_MSG( m_open, FALSE, wxT("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(); - - 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; + /* get formats from wxDataObjects */ + wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ]; + data.GetAllFormats( array ); - gtk_selection_convert( m_clipboardWidget, - m_usePrimary ? GDK_SELECTION_PRIMARY : 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, wxT("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