X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/dc86cb34c3a8f141686339f1285cf259dec5faaa..64ea838d8f4d1853b7d850db93ee565e901d099a:/src/gtk1/clipbrd.cpp diff --git a/src/gtk1/clipbrd.cpp b/src/gtk1/clipbrd.cpp index 48cd4598f4..2c5b0ff885 100644 --- a/src/gtk1/clipbrd.cpp +++ b/src/gtk1/clipbrd.cpp @@ -1,49 +1,298 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: clipbrd.cpp +// Name: src/gtk1/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" + #include "wx/dataobj.h" +#endif + +#include +#include +#include + //----------------------------------------------------------------------------- // data //----------------------------------------------------------------------------- -wxClipboard *wxTheClipboard = (wxClipboard*) NULL; +GdkAtom g_clipboardAtom = 0; +GdkAtom g_targetsAtom = 0; +GdkAtom g_timestampAtom = 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!) +#define TRACE_CLIPBOARD "clipboard" + +//----------------------------------------------------------------------------- +// 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 +//----------------------------------------------------------------------------- + +extern "C" { +static void +targets_selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, + guint32 WXUNUSED(time), + wxClipboard *clipboard ) +{ + if ( wxTheClipboard && selection_data->length > 0 ) + { + // make sure we got the data in the correct form + GdkAtom type = selection_data->type; + if ( type != GDK_SELECTION_TYPE_ATOM ) + { + gchar* atom_name = gdk_atom_name(type); + if ( strcmp(atom_name, "TARGETS") ) + { + wxLogTrace( TRACE_CLIPBOARD, + wxT("got unsupported clipboard target") ); + + clipboard->m_waiting = false; + g_free(atom_name); + return; + } + g_free(atom_name); + } + + wxDataFormat clip( selection_data->selection ); + wxLogTrace( TRACE_CLIPBOARD, + wxT("selection received for targets, clipboard %s"), + clip.GetId().c_str() ); + + // 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; + } + } + } + + clipboard->m_waiting = false; +} +} //----------------------------------------------------------------------------- -// functions +// "selection_received" for the actual data //----------------------------------------------------------------------------- -void wxInitClipboard() +extern "C" { +static void +selection_received( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, + guint32 WXUNUSED(time), + 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; + } + + 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; + } + +#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) + { + 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; } +} + +//----------------------------------------------------------------------------- +// "selection_clear" +//----------------------------------------------------------------------------- -void wxDoneClipboard() +extern "C" { +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_data) + { + wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" )); + + wxDELETE(wxTheClipboard->m_data); + } + } + + wxTheClipboard->m_waiting = false; + return TRUE; +} } //----------------------------------------------------------------------------- -// "selection_received" +// selection handler for supplying data //----------------------------------------------------------------------------- -/* -static void selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointer data ) +extern "C" { +static void +selection_handler( GtkWidget *WXUNUSED(widget), + GtkSelectionData *selection_data, + guint WXUNUSED(info), + guint WXUNUSED(time), + gpointer signal_data ) { + if (!wxTheClipboard) return; + + 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) + { + 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, + wxT("Clipboard TIMESTAMP requested, returning timestamp=%u"), + timestamp); + return; + } + + wxDataFormat format( selection_data->target ); + + wxLogTrace(TRACE_CLIPBOARD, + wxT("clipboard data in format %s, GtkSelectionData is target=%s type=%s selection=%s timestamp=%u"), + 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(), + GPOINTER_TO_UINT( signal_data ) + ); + + 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 ); + + gtk_selection_data_set( + selection_data, + GDK_SELECTION_TYPE_STRING, + 8 * sizeof(gchar), + (unsigned char*) d, + size ); + + free(d); +} } -*/ //----------------------------------------------------------------------------- // wxClipboard @@ -53,34 +302,344 @@ 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_waiting = false; + + m_ownsClipboard = false; + m_ownsPrimarySelection = false; + + m_data = NULL; + m_receivedData = 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); + if (!g_timestampAtom) g_timestampAtom = gdk_atom_intern ("TIMESTAMP", FALSE); + + m_formatSupported = false; + m_targetRequested = 0; } 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_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) + { + m_waiting = true; + + gtk_selection_owner_set( 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( NULL, GDK_SELECTION_PRIMARY, + (guint32) GDK_CURRENT_TIME ); + + while (m_waiting) gtk_main_iteration(); + } + + wxDELETE(m_data); + +#if wxUSE_THREADS + /* re-enable GUI threads */ +#endif + } + + m_targetRequested = 0; + m_formatSupported = false; +} + +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 ); +} + +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++) + { + 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; + + gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), + "selection_get", + GTK_SIGNAL_FUNC(selection_handler), + GUINT_TO_POINTER( gdk_event_get_time(gtk_get_current_event()) ) ); + +#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::GetData( wxDataFormat format, size_t *length ) +void wxClipboard::Close() { - if (!IsAvailable(format)) - { - if (length) *length = 0; - return NULL; - } - return NULL; + wxCHECK_RET( m_open, wxT("clipboard not open") ); + + m_open = false; } -bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) ) +bool wxClipboard::IsOpened() const { - return FALSE; + 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 + 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(); + + return m_formatSupported; +} + +bool wxClipboard::GetData( wxDataObject& data ) +{ + 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(); + + /* + Normally this is a true error as we checked for the presence of such + data before, but there are applications that may return an empty + string (e.g. Gnumeric-1.6.1 on Linux if an empty cell is copied) + which would produce a false error message here, so we check for the + size of the string first. In ansi, GetDataSize returns an extra + value (for the closing null?), with unicode, the exact number of + tokens is given (that is more than 1 for special characters) + (tested with Gnumeric-1.6.1 and OpenOffice.org-2.0.2) + */ +#if wxUSE_UNICODE + if ( format != wxDF_UNICODETEXT || data.GetDataSize(format) > 0 ) +#else // !UNICODE + if ( format != wxDF_TEXT || data.GetDataSize(format) > 1 ) +#endif // UNICODE / !UNICODE + { + 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