9005f2edfd
2. Added IsUsingPrimarySelection() 3. Fail all clipboard operations when IsUsingPrimarySelection() is true on non-X11 platforms git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45183 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
614 lines
17 KiB
C++
614 lines
17 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/x11/clipbrd.cpp
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// Purpose: Clipboard functionality
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// Author: Robert Roebling
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// Created:
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// RCS-ID: $Id$
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// Copyright: (c) Robert Roebling
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// for compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#if wxUSE_CLIPBOARD
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#include "wx/clipbrd.h"
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#ifndef WX_PRECOMP
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#include "wx/log.h"
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#include "wx/utils.h"
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#include "wx/dataobj.h"
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#endif
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#include "wx/x11/private.h"
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//-----------------------------------------------------------------------------
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// data
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//-----------------------------------------------------------------------------
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#if !wxUSE_NANOX
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Atom g_clipboardAtom = 0;
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Atom g_targetsAtom = 0;
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#endif
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// avoid warnings about unused static variable (notice that we still use it
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// even in release build if the compiler doesn't support variadic macros)
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#if defined(__WXDEBUG__) || !defined(HAVE_VARIADIC_MACROS)
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// the trace mask we use with wxLogTrace() - call
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// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
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// (there will be a *lot* of them!)
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static const wxChar *TRACE_CLIPBOARD = _T("clipboard");
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#endif // __WXDEBUG__
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//-----------------------------------------------------------------------------
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// reminder
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//-----------------------------------------------------------------------------
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/* The contents of a selection are returned in a GtkSelectionData
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structure. selection/target identify the request.
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type specifies the type of the return; if length < 0, and
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the data should be ignored. This structure has object semantics -
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no fields should be modified directly, they should not be created
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directly, and pointers to them should not be stored beyond the duration of
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a callback. (If the last is changed, we'll need to add reference
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counting)
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struct _GtkSelectionData
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{
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GdkAtom selection;
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GdkAtom target;
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GdkAtom type;
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gint format;
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guchar *data;
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gint length;
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};
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*/
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//-----------------------------------------------------------------------------
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// "selection_received" for targets
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//-----------------------------------------------------------------------------
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#if 0
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static void
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targets_selection_received( GtkWidget *WXUNUSED(widget),
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GtkSelectionData *selection_data,
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#if (GTK_MINOR_VERSION > 0)
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guint32 WXUNUSED(time),
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#endif
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wxClipboard *clipboard )
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{
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if ( wxTheClipboard && selection_data->length > 0 )
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{
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/* make sure we got the data in the correct form */
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GdkAtom type = selection_data->type;
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if ( type != GDK_SELECTION_TYPE_ATOM )
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{
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if ( strcmp(gdk_atom_name(type), "TARGETS") )
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{
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wxLogTrace( TRACE_CLIPBOARD,
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_T("got unsupported clipboard target") );
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clipboard->m_waiting = false;
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return;
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}
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}
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#ifdef __WXDEBUG__
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wxDataFormat clip( selection_data->selection );
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wxLogTrace( TRACE_CLIPBOARD,
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wxT("selection received for targets, clipboard %s"),
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clip.GetId().c_str() );
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#endif // __WXDEBUG__
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// the atoms we received, holding a list of targets (= formats)
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GdkAtom *atoms = (GdkAtom *)selection_data->data;
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for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
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{
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wxDataFormat format( atoms[i] );
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wxLogTrace( TRACE_CLIPBOARD,
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wxT("selection received for targets, format %s"),
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format.GetId().c_str() );
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if (format == clipboard->m_targetRequested)
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{
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clipboard->m_waiting = false;
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clipboard->m_formatSupported = true;
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return;
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}
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}
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}
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clipboard->m_waiting = false;
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}
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//-----------------------------------------------------------------------------
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// "selection_received" for the actual data
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//-----------------------------------------------------------------------------
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static void
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selection_received( GtkWidget *WXUNUSED(widget),
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GtkSelectionData *selection_data,
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#if (GTK_MINOR_VERSION > 0)
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guint32 WXUNUSED(time),
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#endif
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wxClipboard *clipboard )
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{
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if (!wxTheClipboard)
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{
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clipboard->m_waiting = false;
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return;
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}
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wxDataObject *data_object = clipboard->m_receivedData;
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if (!data_object)
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{
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clipboard->m_waiting = false;
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return;
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}
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if (selection_data->length <= 0)
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{
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clipboard->m_waiting = false;
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return;
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}
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wxDataFormat format( selection_data->target );
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/* make sure we got the data in the correct format */
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if (!data_object->IsSupportedFormat( format ) )
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{
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clipboard->m_waiting = false;
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return;
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}
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/* make sure we got the data in the correct form (selection type).
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if so, copy data to target object */
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if (selection_data->type != GDK_SELECTION_TYPE_STRING)
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{
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clipboard->m_waiting = false;
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return;
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}
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data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
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wxTheClipboard->m_formatSupported = true;
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clipboard->m_waiting = false;
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}
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//-----------------------------------------------------------------------------
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// "selection_clear"
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//-----------------------------------------------------------------------------
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static gint
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selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
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{
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if (!wxTheClipboard) return TRUE;
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if (event->selection == GDK_SELECTION_PRIMARY)
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{
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wxTheClipboard->m_ownsPrimarySelection = false;
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}
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else
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if (event->selection == g_clipboardAtom)
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{
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wxTheClipboard->m_ownsClipboard = false;
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}
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else
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{
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wxTheClipboard->m_waiting = false;
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return FALSE;
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}
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if ((!wxTheClipboard->m_ownsPrimarySelection) &&
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(!wxTheClipboard->m_ownsClipboard))
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{
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/* the clipboard is no longer in our hands. we can the delete clipboard data. */
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if (wxTheClipboard->m_data)
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{
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wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));
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delete wxTheClipboard->m_data;
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wxTheClipboard->m_data = (wxDataObject*) NULL;
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}
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}
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wxTheClipboard->m_waiting = false;
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return TRUE;
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}
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//-----------------------------------------------------------------------------
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// selection handler for supplying data
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//-----------------------------------------------------------------------------
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static void
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selection_handler( GtkWidget *WXUNUSED(widget),
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GtkSelectionData *selection_data,
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guint WXUNUSED(info),
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guint WXUNUSED(time),
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gpointer WXUNUSED(data) )
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{
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if (!wxTheClipboard) return;
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if (!wxTheClipboard->m_data) return;
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wxDataObject *data = wxTheClipboard->m_data;
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wxDataFormat format( selection_data->target );
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if (!data->IsSupportedFormat( format )) return;
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int size = data->GetDataSize( format );
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if (size == 0) return;
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void *d = malloc(size);
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data->GetDataHere( selection_data->target, d );
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// transform Unicode text into multibyte before putting it on clipboard
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#if wxUSE_UNICODE
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if ( format.GetType() == wxDF_TEXT || format.GetType() == wxDF_UNICODETEXT)
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{
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const wchar_t *wstr = (const wchar_t *)d;
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size_t len = wxConvCurrent->WC2MB(NULL, wstr, 0);
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char *str = malloc(len + 1);
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wxConvCurrent->WC2MB(str, wstr, len);
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str[len] = '\0';
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free(d);
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d = str;
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}
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#endif // wxUSE_UNICODE
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gtk_selection_data_set(
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selection_data,
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GDK_SELECTION_TYPE_STRING,
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8*sizeof(gchar),
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(unsigned char*) d,
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size );
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free(d);
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}
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#endif
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//-----------------------------------------------------------------------------
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// wxClipboard
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//-----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
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wxClipboard::wxClipboard()
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{
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m_open = false;
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m_ownsClipboard = false;
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m_ownsPrimarySelection = false;
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m_data = (wxDataObject*) NULL;
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m_receivedData = (wxDataObject*) NULL;
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/* we use m_targetsWidget to query what formats are available */
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/* we use m_clipboardWidget to get and to offer data */
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#if !wxUSE_NANOX
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if (!g_clipboardAtom) g_clipboardAtom = XInternAtom( (Display*) wxGetDisplay(), "CLIPBOARD", False );
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if (!g_targetsAtom) g_targetsAtom = XInternAtom( (Display*) wxGetDisplay(), "TARGETS", False );
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#endif
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m_formatSupported = false;
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m_targetRequested = 0;
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}
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wxClipboard::~wxClipboard()
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{
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Clear();
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// if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
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// if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
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}
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void wxClipboard::Clear()
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{
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if (m_data)
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{
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#if wxUSE_THREADS
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/* disable GUI threads */
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#endif
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/* As we have data we also own the clipboard. Once we no longer own
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it, clear_selection is called which will set m_data to zero */
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#if 0
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if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
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{
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m_waiting = true;
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gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
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(guint32) GDK_CURRENT_TIME );
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while (m_waiting) gtk_main_iteration();
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}
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if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
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{
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m_waiting = true;
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gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
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(guint32) GDK_CURRENT_TIME );
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while (m_waiting) gtk_main_iteration();
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}
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#endif
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if (m_data)
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{
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delete m_data;
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m_data = (wxDataObject*) NULL;
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}
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#if wxUSE_THREADS
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/* re-enable GUI threads */
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#endif
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}
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m_targetRequested = 0;
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m_formatSupported = false;
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}
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bool wxClipboard::Open()
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{
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wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
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m_open = true;
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return true;
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}
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bool wxClipboard::SetData( wxDataObject *data )
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{
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wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
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wxCHECK_MSG( data, false, wxT("data is invalid") );
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Clear();
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return AddData( data );
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}
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bool wxClipboard::AddData( wxDataObject *data )
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{
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#if wxUSE_NANOX
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return false;
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#else
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wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
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wxCHECK_MSG( data, false, wxT("data is invalid") );
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/* we can only store one wxDataObject */
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Clear();
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m_data = data;
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/* get formats from wxDataObjects */
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wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
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m_data->GetAllFormats( array );
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#if 0
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/* primary selection or clipboard */
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Atom clipboard = m_usePrimary ? (Atom) 1 // 1 = primary selection
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: g_clipboardAtom;
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#endif // 0
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for (size_t i = 0; i < m_data->GetFormatCount(); i++)
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{
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wxLogTrace( TRACE_CLIPBOARD,
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wxT("wxClipboard now supports atom %s"),
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array[i].GetId().c_str() );
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#if 0
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gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
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clipboard,
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array[i],
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0 ); /* what is info ? */
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#endif
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}
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delete[] array;
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#if 0
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gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
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"selection_get",
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GTK_SIGNAL_FUNC(selection_handler),
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(gpointer) NULL );
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#endif
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#if wxUSE_THREADS
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/* disable GUI threads */
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#endif
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bool res = false;
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#if 0
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/* Tell the world we offer clipboard data */
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res = (gtk_selection_owner_set( m_clipboardWidget,
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clipboard,
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(guint32) GDK_CURRENT_TIME ));
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#endif
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if (m_usePrimary)
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m_ownsPrimarySelection = res;
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else
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m_ownsClipboard = res;
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#if wxUSE_THREADS
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/* re-enable GUI threads */
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#endif
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return res;
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#endif
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}
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void wxClipboard::Close()
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{
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wxCHECK_RET( m_open, wxT("clipboard not open") );
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m_open = false;
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}
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bool wxClipboard::IsOpened() const
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{
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return m_open;
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}
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bool wxClipboard::IsSupported( const wxDataFormat& format )
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{
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/* reentrance problems */
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if (m_waiting) return false;
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/* store requested format to be asked for by callbacks */
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m_targetRequested = format;
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#if 0
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wxLogTrace( TRACE_CLIPBOARD,
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wxT("wxClipboard:IsSupported: requested format: %s"),
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format.GetId().c_str() );
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#endif
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wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
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m_formatSupported = false;
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/* perform query. this will set m_formatSupported to
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true if m_targetRequested is supported.
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also, we have to wait for the "answer" from the
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clipboard owner which is an asynchronous process.
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therefore we set m_waiting = true here and wait
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until the callback "targets_selection_received"
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sets it to false */
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m_waiting = true;
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#if 0
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gtk_selection_convert( m_targetsWidget,
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m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
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: g_clipboardAtom,
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g_targetsAtom,
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(guint32) GDK_CURRENT_TIME );
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while (m_waiting) gtk_main_iteration();
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#endif
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if (!m_formatSupported) return false;
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return true;
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}
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bool wxClipboard::GetData( wxDataObject& data )
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{
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wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
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/* get formats from wxDataObjects */
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wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
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data.GetAllFormats( array );
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for (size_t i = 0; i < data.GetFormatCount(); i++)
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{
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wxDataFormat format( array[i] );
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wxLogTrace( TRACE_CLIPBOARD,
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wxT("wxClipboard::GetData: requested format: %s"),
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format.GetId().c_str() );
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/* is data supported by clipboard ? */
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/* store requested format to be asked for by callbacks */
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m_targetRequested = format;
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wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
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m_formatSupported = false;
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/* perform query. this will set m_formatSupported to
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true if m_targetRequested is supported.
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also, we have to wait for the "answer" from the
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clipboard owner which is an asynchronous process.
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therefore we set m_waiting = true here and wait
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until the callback "targets_selection_received"
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sets it to false */
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m_waiting = true;
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#if 0
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gtk_selection_convert( m_targetsWidget,
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m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
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: g_clipboardAtom,
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g_targetsAtom,
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(guint32) GDK_CURRENT_TIME );
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while (m_waiting) gtk_main_iteration();
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#endif
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if (!m_formatSupported) continue;
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/* store pointer to data object to be filled up by callbacks */
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m_receivedData = &data;
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/* store requested format to be asked for by callbacks */
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m_targetRequested = format;
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wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
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/* start query */
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m_formatSupported = false;
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/* ask for clipboard contents. this will set
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m_formatSupported to true if m_targetRequested
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is supported.
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also, we have to wait for the "answer" from the
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clipboard owner which is an asynchronous process.
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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") );
|
|
|
|
#if 0
|
|
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();
|
|
#endif
|
|
|
|
/* 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
|