X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/dc86cb34c3a8f141686339f1285cf259dec5faaa..866592d872daa1f4e3d44948d7d3a6c90b0af9d0:/src/gtk/clipbrd.cpp diff --git a/src/gtk/clipbrd.cpp b/src/gtk/clipbrd.cpp index 48cd4598f4..d3cd53bc4e 100644 --- a/src/gtk/clipbrd.cpp +++ b/src/gtk/clipbrd.cpp @@ -13,37 +13,335 @@ #include "wx/clipbrd.h" +#if wxUSE_CLIPBOARD + +#include "wx/utils.h" + +#include "glib.h" +#include "gdk/gdk.h" +#include "gtk/gtk.h" + +//----------------------------------------------------------------------------- +// 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; + +//----------------------------------------------------------------------------- +// reminder +//----------------------------------------------------------------------------- + +/* The contents of a selection are returned in a GtkSelectionData + 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 + directly, and pointers to them should not be stored beyond the duration of + a callback. (If the last is changed, we'll need to add reference + counting) + +struct _GtkSelectionData +{ + GdkAtom selection; + GdkAtom target; + GdkAtom type; + gint format; + guchar *data; + gint length; +}; + +*/ + +//----------------------------------------------------------------------------- +// "selection_received" for targets +//----------------------------------------------------------------------------- + +static void +targets_selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, +#if (GTK_MINOR_VERSION > 0) + guint32 WXUNUSED(time), +#endif + 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) + { + clipboard->m_waiting = FALSE; + 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++) + { +/* 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; + clipboard->m_formatSupported = TRUE; + return; + } + } + + clipboard->m_waiting = FALSE; + return; +} + //----------------------------------------------------------------------------- -// functions +// "selection_received" for the actual data //----------------------------------------------------------------------------- -void wxInitClipboard() +static void +selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, +#if (GTK_MINOR_VERSION > 0) + guint32 WXUNUSED(time), +#endif + wxClipboard *clipboard ) { - if (wxTheClipboard) delete wxTheClipboard; - wxTheClipboard = new wxClipboard(); + 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; + } + + /* make sure we got the data in the correct format */ + if (data_object->GetFormat().GetAtom() != selection_data->target) + { + 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()) + { + 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 char*) 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; + } + } + + wxTheClipboard->m_formatSupported = TRUE; + clipboard->m_waiting = FALSE; } -void wxDoneClipboard() +//----------------------------------------------------------------------------- +// "selection_clear" +//----------------------------------------------------------------------------- + +static gint +selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) { - if (wxTheClipboard) delete wxTheClipboard; - wxTheClipboard = (wxClipboard*) NULL; + if (!wxTheClipboard) return TRUE; + + if (event->selection == GDK_SELECTION_PRIMARY) + { + wxTheClipboard->m_ownsPrimarySelection = FALSE; + } + else + if (event->selection == g_clipboardAtom) + { + wxTheClipboard->m_ownsClipboard = FALSE; + } + else + { + wxTheClipboard->m_waiting = FALSE; + return FALSE; + } + + if ((!wxTheClipboard->m_ownsPrimarySelection) && + (!wxTheClipboard->m_ownsClipboard)) + { + /* the clipboard is no longer in our hands. we can the delete clipboard data. */ + if (wxTheClipboard->m_dataBroker) + { + delete wxTheClipboard->m_dataBroker; + wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL; + } + } + + wxTheClipboard->m_waiting = FALSE; + return TRUE; } //----------------------------------------------------------------------------- -// "selection_received" +// selection handler for supplying data //----------------------------------------------------------------------------- -/* -static void selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointer data ) +static void +selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) ) { + if (!wxTheClipboard) return; + + if (!wxTheClipboard->m_dataBroker) return; + + wxNode *node = wxTheClipboard->m_dataBroker->m_dataObjects.First(); + + while (node) + { + wxDataObject *data_object = (wxDataObject *)node->Data(); + + if (data_object->GetFormat().GetAtom() != selection_data->target) + { + node = node->Next(); + continue; + } + + switch (data_object->GetFormat().GetType()) + { + case wxDF_TEXT: + { + wxTextDataObject *text_object = (wxTextDataObject*) data_object; + + 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 ); + + break; + } + + case wxDF_BITMAP: + { + wxBitmapDataObject *bitmap_object = (wxBitmapDataObject*) data_object; + + if (bitmap_object->GetSize() == 0) return; + + gtk_selection_data_set( + selection_data, + GDK_SELECTION_TYPE_STRING, + 8*sizeof(gchar), + (unsigned char*) bitmap_object->GetData(), + (int) bitmap_object->GetSize() ); + + 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(); + } } -*/ //----------------------------------------------------------------------------- // wxClipboard @@ -53,34 +351,324 @@ IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject) wxClipboard::wxClipboard() { - m_data = (wxDataObject*)NULL; - m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP ); - gtk_widget_realize( m_clipboardWidget ); + m_open = FALSE; + + m_ownsClipboard = FALSE; + m_ownsPrimarySelection = FALSE; + + m_dataBroker = (wxDataBroker*) 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), + "selection_received", + GTK_SIGNAL_FUNC( selection_received ), + (gpointer) this ); + + gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), + "selection_clear_event", + GTK_SIGNAL_FUNC( selection_clear_clip ), + (gpointer) NULL ); + + if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE ); + if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE); + + m_formatSupported = FALSE; + m_targetRequested = 0; + + m_usePrimary = FALSE; } wxClipboard::~wxClipboard() { - if (m_data) delete m_data; - if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget ); + Clear(); + + if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget ); + if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget ); } -void wxClipboard::SetData( wxDataObject *data ) +void wxClipboard::Clear() { - if (m_data) delete m_data; - m_data = data; + if (m_dataBroker) + { +#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) + { + m_waiting = TRUE; + + gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, 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 ); + + while (m_waiting) gtk_main_iteration(); + } + + 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; } -void *wxClipboard::GetData( wxDataFormat format, size_t *length ) +bool wxClipboard::Open() { - if (!IsAvailable(format)) - { - if (length) *length = 0; - return NULL; - } - return NULL; + wxCHECK_MSG( !m_open, FALSE, _T("clipboard already open") ); + + m_open = TRUE; + + return TRUE; } -bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) ) +bool wxClipboard::SetData( wxDataObject *data ) { - return FALSE; + wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") ); + + wxCHECK_MSG( data, FALSE, _T("data is invalid") ); + + Clear(); + + return AddData( 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 */ + +#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 + +#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 )) + { +#if wxUSE_THREADS + /* re-enable GUI threads */ + wxapp_install_thread_wakeup(); +#endif + return FALSE; + } + m_ownsClipboard = TRUE; + + if (!gtk_selection_owner_set( m_clipboardWidget, + GDK_SELECTION_PRIMARY, + GDK_CURRENT_TIME )) + { +#if wxUSE_THREADS + /* re-enable GUI threads */ + wxapp_install_thread_wakeup(); +#endif + return FALSE; + } + m_ownsPrimarySelection = TRUE; + +#if wxUSE_THREADS + /* re-enable GUI threads */ + wxapp_install_thread_wakeup(); +#endif + + return TRUE; +} + +void wxClipboard::Close() +{ + wxCHECK_RET( m_open, _T("clipboard not open") ); + + m_open = FALSE; +} + +bool wxClipboard::IsSupported( wxDataFormat format ) +{ + wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") ); + + /* store requested format to be asked for by callbacks */ + + m_targetRequested = format.GetAtom(); + + wxCHECK_MSG( m_targetRequested, FALSE, _T("invalid clipboard format") ); + + m_formatSupported = FALSE; + + /* perform query. this will set m_formatSupported to + TRUE if m_targetRequested is supported. + alsom 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?GDK_SELECTION_PRIMARY:g_clipboardAtom, + g_targetsAtom, + GDK_CURRENT_TIME ); + + while (m_waiting) gtk_main_iteration(); + + if (!m_formatSupported) return FALSE; + + return TRUE; +} + +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 */ + + m_waiting = TRUE; + + gtk_selection_convert( m_clipboardWidget, + m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom, + m_targetRequested, + 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, _T("error retrieving data from clipboard") ); + + return TRUE; +} + +//----------------------------------------------------------------------------- +// wxClipboardModule +//----------------------------------------------------------------------------- + +IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule) + +bool wxClipboardModule::OnInit() +{ + wxTheClipboard = new wxClipboard(); + + return TRUE; +} + +void wxClipboardModule::OnExit() +{ + if (wxTheClipboard) delete wxTheClipboard; + wxTheClipboard = (wxClipboard*) NULL; +} + +#endif + + // wxUSE_CLIPBOARD +