/////////////////////////////////////////////////////////////////////////////
-// Name: clipbrd.cpp
-// Purpose:
-// Author: Robert Roebling
+// Name: src/gtk/clipbrd.cpp
+// Purpose: wxClipboard implementation for wxGTK
+// Author: Robert Roebling, Vadim Zeitlin
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// (c) 2007 Vadim Zeitlin
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "clipbrd.h"
-#endif
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// 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 "wx/ptr_scpd.h"
+#include "wx/scopeguard.h"
+
+#include "wx/gtk/private.h"
+
+wxDECLARE_SCOPED_ARRAY(wxDataFormat, wxDataFormatArray)
+wxDEFINE_SCOPED_ARRAY(wxDataFormat, wxDataFormatArray)
+
+// ----------------------------------------------------------------------------
// data
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+
+static GdkAtom g_clipboardAtom = 0;
+static GdkAtom g_targetsAtom = 0;
+static 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!)
+#define TRACE_CLIPBOARD _T("clipboard")
+
+// ----------------------------------------------------------------------------
+// wxClipboardSync: used to perform clipboard operations synchronously
+// ----------------------------------------------------------------------------
+
+// constructing this object on stack will wait wait until the latest clipboard
+// operation is finished on block exit
+//
+// notice that there can be no more than one such object alive at any moment,
+// i.e. reentrancies are not allowed
+class wxClipboardSync
+{
+public:
+ wxClipboardSync(wxClipboard& clipboard)
+ {
+ wxASSERT_MSG( !ms_clipboard, _T("reentrancy in clipboard code") );
+ ms_clipboard = &clipboard;
+ }
+
+ ~wxClipboardSync()
+ {
+ while ( ms_clipboard )
+ gtk_main_iteration();
+ }
+
+ // this method must be called by GTK+ callbacks to indicate that we got the
+ // result for our clipboard operation
+ static void OnDone(wxClipboard *clipboard)
+ {
+ wxASSERT_MSG( clipboard == ms_clipboard,
+ _T("got notification for alien clipboard") );
-wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
+ ms_clipboard = NULL;
+ }
-GdkAtom g_textAtom = 0;
-GdkAtom g_clipboardAtom = 0;
+ // this method should be called if it's possible that no async clipboard
+ // operation is currently in progress (like it can be the case when the
+ // clipboard is cleared but not because we asked about it), it should only
+ // be called if such situation is expected -- otherwise call OnDone() which
+ // would assert in this case
+ static void OnDoneIfInProgress(wxClipboard *clipboard)
+ {
+ if ( ms_clipboard )
+ OnDone(clipboard);
+ }
+
+private:
+ static wxClipboard *ms_clipboard;
+
+ DECLARE_NO_COPY_CLASS(wxClipboardSync)
+};
+
+wxClipboard *wxClipboardSync::ms_clipboard = NULL;
+
+// ============================================================================
+// clipboard ca;backs implementation
+// ============================================================================
//-----------------------------------------------------------------------------
-// functions
+// "selection_received" for targets
//-----------------------------------------------------------------------------
-void wxInitClipboard()
+extern "C" {
+static void
+targets_selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint32 WXUNUSED(time),
+ wxClipboard *clipboard )
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = new wxClipboard();
+ if ( !clipboard )
+ return;
+
+ wxON_BLOCK_EXIT1(wxClipboardSync::OnDone, clipboard);
+
+ if ( !selection_data || selection_data->length <= 0 )
+ return;
+
+ // 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") != 0 )
+ {
+ wxLogTrace( TRACE_CLIPBOARD,
+ _T("got unsupported clipboard target") );
+
+ return;
+ }
+ }
+
+#ifdef __WXDEBUG__
+ // it's not really a format, of course, but we can reuse its GetId() method
+ // to format this atom as string
+ wxDataFormat clip(selection_data->selection);
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("Received available formats for clipboard %s"),
+ clip.GetId().c_str() );
+#endif // __WXDEBUG__
+
+ // the atoms we received, holding a list of targets (= formats)
+ const GdkAtom * const atoms = (GdkAtom *)selection_data->data;
+ for ( size_t i = 0; i < selection_data->length/sizeof(GdkAtom); i++ )
+ {
+ const wxDataFormat format(atoms[i]);
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("\t%s"), format.GetId().c_str());
+
+ if ( clipboard->GTKOnTargetReceived(format) )
+ return;
+ }
+}
}
-void wxDoneClipboard()
+bool wxClipboard::GTKOnTargetReceived(const wxDataFormat& format)
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = (wxClipboard*) NULL;
+ if ( format != m_targetRequested )
+ return false;
+
+ m_formatSupported = true;
+ return true;
}
//-----------------------------------------------------------------------------
-// "selection_received"
+// "selection_received" for the actual data
//-----------------------------------------------------------------------------
-static void
-selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointer data )
+extern "C" {
+static void
+selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint32 WXUNUSED(time),
+ wxClipboard *clipboard )
{
+ if ( !clipboard )
+ return;
+
+ wxON_BLOCK_EXIT1(wxClipboardSync::OnDone, clipboard);
+
+ if ( !selection_data || selection_data->length <= 0 )
+ return;
+
+ clipboard->GTKOnSelectionReceived(*selection_data);
+}
}
//-----------------------------------------------------------------------------
// "selection_clear"
//-----------------------------------------------------------------------------
+extern "C" {
static gint
-selection_clear( GtkWidget *widget, GdkEventSelection *event )
+selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
- /* The clipboard is no longer in our hands. We can delete the
- * clipboard data. I hope I got that one right... */
-
- if (!wxTheClipboard) return TRUE;
-
- wxTheClipboard->SetData( (wxDataObject*) NULL );
-
- return TRUE;
+ wxClipboard * const clipboard = wxTheClipboard;
+ if ( !clipboard )
+ return TRUE;
+
+ // notice the use of OnDoneIfInProgress() here instead of just OnDone():
+ // it's perfectly possible that we're receiving this notification from GTK+
+ // even though we hadn't cleared the clipboard ourselves but because
+ // another application (or even another window in the same program)
+ // acquired it
+ wxON_BLOCK_EXIT1(wxClipboardSync::OnDoneIfInProgress, clipboard);
+
+ wxClipboard::Kind kind;
+ if (event->selection == GDK_SELECTION_PRIMARY)
+ {
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Lost primary selection" ));
+
+ kind = wxClipboard::Primary;
+ }
+ else if (event->selection == g_clipboardAtom)
+ {
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Lost clipboard" ));
+
+ kind = wxClipboard::Clipboard;
+ }
+ else // some other selection, we're not concerned
+ {
+ return FALSE;
+ }
+
+ // the clipboard is no longer in our hands, we don't need data any more
+ clipboard->GTKClearData(kind);
+
+ return TRUE;
+}
}
//-----------------------------------------------------------------------------
// selection handler for supplying data
//-----------------------------------------------------------------------------
+extern "C" {
static void
-selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
-{
- if (!wxTheClipboard) return;
-
- wxDataObject *data_object = wxTheClipboard->m_data;
-
- if (!data_object) return;
-
- if (data_object->GetDataSize() == 0) return;
-
- gint len = data_object->GetDataSize();
- guchar *bin_data = (guchar*) malloc( len );
- data_object->GetDataHere( (void*)bin_data );
-
- if (selection_data->target == GDK_SELECTION_TYPE_STRING)
- {
- gtk_selection_data_set(
- selection_data, GDK_SELECTION_TYPE_STRING, 8*sizeof(gchar), bin_data, len );
- }
- else if (selection_data->target == g_textAtom)
- {
- gtk_selection_data_set(
- selection_data, g_textAtom, 8*sizeof(gchar), bin_data, len );
- }
- free( bin_data );
+selection_handler( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint WXUNUSED(info),
+ guint WXUNUSED(time),
+ gpointer signal_data )
+{
+ wxClipboard * const clipboard = wxTheClipboard;
+ if ( !clipboard )
+ return;
+
+ wxDataObject * const data = clipboard->GTKGetDataObject();
+ if ( !data )
+ return;
+
+ // 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,
+ _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);
+ wxON_BLOCK_EXIT1(free, d);
+
+ // 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 );
+ }
+}
}
-//-----------------------------------------------------------------------------
-// wxClipboard
-//-----------------------------------------------------------------------------
+void wxClipboard::GTKOnSelectionReceived(const GtkSelectionData& sel)
+{
+ wxCHECK_RET( m_receivedData, _T("should be inside GetData()") );
+
+ const wxDataFormat format(sel.target);
+ wxLogTrace(TRACE_CLIPBOARD, _T("Received selection %s"),
+ format.GetId().c_str());
+
+ if ( !m_receivedData->IsSupportedFormat(format) )
+ return;
+
+ m_receivedData->SetData(format, sel.length, sel.data);
+ m_formatSupported = true;
+}
+
+// ============================================================================
+// wxClipboard implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxClipboard ctor/dtor
+// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
wxClipboard::wxClipboard()
{
- m_data = (wxDataObject*) NULL;
- 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 ),
- (gpointer) NULL );
-
- if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
- if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
+ m_open = false;
+
+ m_dataPrimary =
+ m_dataClipboard =
+ m_receivedData = NULL;
+
+ m_formatSupported = false;
+ m_targetRequested = 0;
+
+ // 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 );
+
+ 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);
+
+ // initialize atoms we use if not done yet
+ 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);
}
wxClipboard::~wxClipboard()
{
- /* 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)
- {
- delete m_data;
- gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
- }
- if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
-}
-
-void wxClipboard::SetData( wxDataObject *data )
-{
- if (m_data) delete m_data;
- m_data = data;
- if (!m_data) return;
-
- if (!gtk_selection_owner_set( m_clipboardWidget,
- g_clipboardAtom,
- GDK_CURRENT_TIME))
- {
- delete m_data;
- m_data = (wxDataObject*) NULL;
- return;
- }
-
- switch (m_data->GetPreferredFormat())
- {
-/*
- case wxDF_STRING:
- gtk_selection_add_handler( m_clipboardWidget,
- g_clipboardAtom,
- GDK_TARGET_STRING,
- selection_handler,
- NULL );
- break;
- case wxDF_TEXT:
- gtk_selection_add_handler( m_clipboardWidget,
- g_clipboardAtom,
- g_textAtom,
- selection_handler,
- NULL );
- break;
-*/
- default:
- break;
- }
-}
-
-void *wxClipboard::GetData( wxDataFormat format, size_t *length )
-{
- if (!IsAvailable(format))
- {
- if (length) *length = 0;
- return NULL;
- }
- return NULL;
-}
-
-bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) )
-{
- return FALSE;
+ Clear();
+
+ gtk_widget_destroy( m_clipboardWidget );
+ gtk_widget_destroy( m_targetsWidget );
+}
+
+// ----------------------------------------------------------------------------
+// wxClipboard helper functions
+// ----------------------------------------------------------------------------
+
+GdkAtom wxClipboard::GTKGetClipboardAtom() const
+{
+ return m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom;
+}
+
+void wxClipboard::GTKClearData(Kind kind)
+{
+ wxDataObject *&data = Data(kind);
+ if ( data )
+ {
+ delete data;
+ data = NULL;
+ }
+}
+
+bool wxClipboard::SetSelectionOwner(bool set)
+{
+ bool rc = gtk_selection_owner_set
+ (
+ set ? m_clipboardWidget : NULL,
+ GTKGetClipboardAtom(),
+ (guint32)GDK_CURRENT_TIME
+ );
+
+ if ( !rc )
+ {
+ wxLogTrace(TRACE_CLIPBOARD, _T("Failed to %sset selection owner"),
+ set ? _T("") : _T("un"));
+ }
+
+ return rc;
+}
+
+void wxClipboard::AddSupportedTarget(GdkAtom atom)
+{
+ gtk_selection_add_target
+ (
+ m_clipboardWidget,
+ GTKGetClipboardAtom(),
+ atom,
+ 0 // info (same as client data) unused
+ );
+}
+
+bool wxClipboard::DoIsSupported(const wxDataFormat& format)
+{
+ wxCHECK_MSG( format, false, wxT("invalid clipboard format") );
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Checking if format %s is available"),
+ format.GetId().c_str());
+
+ // these variables will be used by our GTKOnTargetReceived()
+ m_targetRequested = format;
+ m_formatSupported = false;
+
+ // block until m_formatSupported is set from targets_selection_received
+ // callback
+ {
+ wxClipboardSync sync(*this);
+
+ gtk_selection_convert( m_targetsWidget,
+ GTKGetClipboardAtom(),
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+ }
+
+ return m_formatSupported;
+}
+
+// ----------------------------------------------------------------------------
+// wxClipboard public API implementation
+// ----------------------------------------------------------------------------
+
+void wxClipboard::Clear()
+{
+ if ( gdk_selection_owner_get(GTKGetClipboardAtom()) ==
+ m_clipboardWidget->window )
+ {
+ wxClipboardSync sync(*this);
+
+ // this will result in selection_clear_clip callback being called and
+ // it will free our data
+ SetSelectionOwner(false);
+ }
+
+ 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 so clear the old one
+ Clear();
+
+ Data() = data;
+
+ // get formats from wxDataObjects
+ const size_t count = data->GetFormatCount();
+ wxDataFormatArray formats(new wxDataFormat[count]);
+ data->GetAllFormats(formats.get());
+
+ // always provide TIMESTAMP as a target, see comments in selection_handler
+ // for explanation
+ AddSupportedTarget(g_timestampAtom);
+
+ for ( size_t i = 0; i < count; i++ )
+ {
+ const wxDataFormat format(formats[i]);
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Adding support for %s"),
+ format.GetId().c_str());
+
+ AddSupportedTarget(format);
+ }
+
+ g_signal_connect (m_clipboardWidget, "selection_get",
+ G_CALLBACK (selection_handler),
+ GUINT_TO_POINTER (gtk_get_current_event_time()) );
+
+ // tell the world we offer clipboard data
+ return SetSelectionOwner();
+}
+
+void wxClipboard::Close()
+{
+ wxCHECK_RET( m_open, wxT("clipboard not open") );
+
+ m_open = false;
+}
+
+bool wxClipboard::IsOpened() const
+{
+ return m_open;
+}
+
+bool wxClipboard::IsSupported( const wxDataFormat& format )
+{
+ if ( DoIsSupported(format) )
+ return true;
+
+#if wxUSE_UNICODE
+ if ( format == wxDF_UNICODETEXT )
+ {
+ // also with plain STRING format
+ return DoIsSupported(g_altTextAtom);
+ }
+#endif // wxUSE_UNICODE
+
+ return false;
+}
+
+bool wxClipboard::GetData( wxDataObject& data )
+{
+ wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
+
+ // get all supported formats from wxDataObjects
+ const size_t count = data.GetFormatCount();
+ wxDataFormatArray formats(new wxDataFormat[count]);
+ data.GetAllFormats(formats.get());
+
+ for ( size_t i = 0; i < count; i++ )
+ {
+ const wxDataFormat format(formats[i]);
+
+ // is this format supported by clipboard ?
+ if ( !DoIsSupported(format) )
+ continue;
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("Requesting format %s"),
+ format.GetId().c_str());
+
+ // these variables will be used by our GTKOnSelectionReceived()
+ m_receivedData = &data;
+ m_formatSupported = false;
+
+ {
+ wxClipboardSync sync(*this);
+
+ gtk_selection_convert(m_clipboardWidget,
+ GTKGetClipboardAtom(),
+ format,
+ (guint32) GDK_CURRENT_TIME );
+ } // wait until we get the results
+
+ /*
+ 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. With 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 non-ASCII 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 true;
+ }
+
+ wxLogTrace(TRACE_CLIPBOARD, wxT("GetData(): format not found"));
+
+ return false;
+}
+
+#endif // wxUSE_CLIPBOARD
projects / wxWidgets.git / blobdiff