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/** @file
* Shared Clipboard - Common X11 code.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef VBOX_INCLUDED_GuestHost_SharedClipboard_x11_h
#define VBOX_INCLUDED_GuestHost_SharedClipboard_x11_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <X11/Intrinsic.h>
#include <iprt/thread.h>
#include <VBox/GuestHost/SharedClipboard.h>
/** Enables the Xt busy / update handling. */
#define VBOX_WITH_SHARED_CLIPBOARD_XT_BUSY 1
/**
* Enumeration for all clipboard formats which we support on X11.
*/
typedef enum _SHCLX11FMT
{
SHCLX11FMT_INVALID = 0,
SHCLX11FMT_TARGETS,
SHCLX11FMT_TEXT, /* Treat this as UTF-8, but it may really be ascii */
SHCLX11FMT_UTF8,
SHCLX11FMT_BMP,
SHCLX11FMT_HTML
#ifdef VBOX_WITH_SHARED_CLIPBOARD_TRANSFERS
, SHCLX11FMT_URI_LIST
#endif
} SHCLX11FMT;
/**
* The table maps X11 names to data formats
* and to the corresponding VBox clipboard formats.
*/
typedef struct SHCLX11FMTTABLE
{
/** The X11 atom name of the format (several names can match one format). */
const char *pcszAtom;
/** The format corresponding to the name. */
SHCLX11FMT enmFmtX11;
/** The corresponding VBox clipboard format. */
SHCLFORMAT uFmtVBox;
} SHCLX11FMTTABLE;
#define NIL_CLIPX11FORMAT 0
/** Defines an index of the X11 clipboad format table. */
typedef unsigned SHCLX11FMTIDX;
/**
* Structure for maintaining a Shared Clipboard context on X11 platforms.
*/
typedef struct _SHCLX11CTX
{
/** Opaque data structure describing the front-end. */
PSHCLCONTEXT pFrontend;
/** Is an X server actually available? */
bool fHaveX11;
/** The X Toolkit application context structure. */
XtAppContext pAppContext;
/** We have a separate thread to wait for window and clipboard events. */
RTTHREAD Thread;
/** Flag indicating that the thread is in a started state. */
bool fThreadStarted;
/** The X Toolkit widget which we use as our clipboard client. It is never made visible. */
Widget pWidget;
/** Should we try to grab the clipboard on startup? */
bool fGrabClipboardOnStart;
/** The best text format X11 has to offer, as an index into the formats table. */
SHCLX11FMTIDX idxFmtText;
/** The best bitmap format X11 has to offer, as an index into the formats table. */
SHCLX11FMTIDX idxFmtBmp;
/** The best HTML format X11 has to offer, as an index into the formats table. */
SHCLX11FMTIDX idxFmtHTML;
#ifdef VBOX_WITH_SHARED_CLIPBOARD_TRANSFERS
/** The best HTML format X11 has to offer, as an index into the formats table. */
SHCLX11FMTIDX idxFmtURI;
#endif
/** What kind of formats does VBox have to offer? */
SHCLFORMATS vboxFormats;
/** Cache of the last unicode data that we received. */
void *pvUnicodeCache;
/** Size of the unicode data in the cache. */
uint32_t cbUnicodeCache;
/** When we wish the clipboard to exit, we have to wake up the event
* loop. We do this by writing into a pipe. This end of the pipe is
* the end that another thread can write to. */
int wakeupPipeWrite;
/** The reader end of the pipe. */
int wakeupPipeRead;
/** A pointer to the XFixesSelectSelectionInput function. */
void (*fixesSelectInput)(Display *, Window, Atom, unsigned long);
/** The first XFixes event number. */
int fixesEventBase;
#ifdef VBOX_WITH_SHARED_CLIPBOARD_XT_BUSY
/** XtGetSelectionValue on some versions of libXt isn't re-entrant
* so block overlapping requests on this flag. */
bool fXtBusy;
/** If a request is blocked on the previous flag, set this flag to request
* an update later - the first callback should check and clear this flag
* before processing the callback event. */
bool fXtNeedsUpdate;
#endif
} SHCLX11CTX, *PSHCLX11CTX;
/** @name Shared Clipboard APIs for X11.
* @{
*/
int ShClX11Init(PSHCLX11CTX pCtx, PSHCLCONTEXT pParent, bool fHeadless);
void ShClX11Destroy(PSHCLX11CTX pCtx);
int ShClX11ThreadStart(PSHCLX11CTX pCtx, bool grab);
int ShClX11ThreadStop(PSHCLX11CTX pCtx);
int ShClX11ReportFormatsToX11(PSHCLX11CTX pCtx, SHCLFORMATS vboxFormats);
int ShClX11ReadDataFromX11(PSHCLX11CTX pCtx, SHCLFORMATS vboxFormat, CLIPREADCBREQ *pReq);
/** @} */
/** @name Shared Clipboard callbacks which have to be implemented the X11 backend and host service.
* @{
*/
DECLCALLBACK(int) ShClX11RequestDataForX11Callback(SHCLCONTEXT *pCtx, SHCLFORMAT Format, void **ppv, uint32_t *pcb);
DECLCALLBACK(void) ShClX11ReportFormatsCallback(SHCLCONTEXT *pCtx, SHCLFORMATS Formats);
DECLCALLBACK(void) ShClX11RequestFromX11CompleteCallback(SHCLCONTEXT *pCtx, int rc, CLIPREADCBREQ *pReq, void *pv, uint32_t cb);
/** @} */
#endif /* !VBOX_INCLUDED_GuestHost_SharedClipboard_x11_h */
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