trunk/rdesktop/xclip.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Protocol services - Clipboard functions
   Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003
   Copyright (C) Matthew Chapman 2003

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include "rdesktop.h"

#define NUM_TARGETS 6

extern Display *g_display;
extern Window g_wnd;
extern Time g_last_gesturetime;

static Atom clipboard_atom, primary_atom, targets_atom, timestamp_atom;
static Atom rdesktop_clipboard_target_atom, rdesktop_clipboard_formats_atom, incr_atom;
static XSelectionRequestEvent selection_request;
static Atom targets[NUM_TARGETS];
static int have_primary = 0;
static int rdesktop_is_selection_owner = 0;

static int g_waiting_for_INCR = 0;
static uint8 *g_clip_buffer = 0;
static uint32 g_clip_buflen = 0;

/* Replace CR-LF to LF (well, rather removing all CR:s) This is done
   in-place. The length is updated. Handles embedded nulls */
static void
crlf2lf(uint8 * data, uint32 * length)
{
        uint8 *dst, *src;
        src = dst = data;
        while (src < data + *length)
        {
                if (*src != '\x0d')
                        *dst++ = *src;
                src++;
        }
        *length = dst - data;
}

/* Translate LF to CR-LF. To do this, we must allocate more memory.  
   The length is updated. */
static uint8 *
lf2crlf(uint8 * data, uint32 * length)
{
        uint8 *result, *p, *o;

        /* Worst case: Every char is LF */
        result = xmalloc(*length * 2);

        p = data;
        o = result;

        while (p < data + *length)
        {
                if (*p == '\x0a')
                        *o++ = '\x0d';
                *o++ = *p++;
        }
        *length = o - result;

        /* Convenience */
        *o++ = '\0';

        return result;
}


static void
xclip_provide_selection(XSelectionRequestEvent * req, Atom type, unsigned int format, uint8 * data,
                        uint32 length)
{
        XEvent xev;

        XChangeProperty(g_display, req->requestor, req->property,
                        type, format, PropModeReplace, data, length);

        xev.xselection.type = SelectionNotify;
        xev.xselection.serial = 0;
        xev.xselection.send_event = True;
        xev.xselection.requestor = req->requestor;
        xev.xselection.selection = req->selection;
        xev.xselection.target = req->target;
        xev.xselection.property = req->property;
        xev.xselection.time = req->time;
        XSendEvent(g_display, req->requestor, False, NoEventMask, &xev);
}

void
xclip_handle_SelectionNotify(XSelectionEvent * event)
{
        unsigned long nitems, bytes_left;
        XWindowAttributes wa;
        Atom type, best_target, text_target;
        Atom *supported_targets;
        int res, i, format;
        uint8 *data;

        if (event->property == None)
                goto fail;

        DEBUG_CLIPBOARD(("xclip_handle_SelectionNotify: selection=%s, target=%s, property=%s\n",
                         XGetAtomName(g_display, event->selection),
                         XGetAtomName(g_display, event->target),
                         XGetAtomName(g_display, event->property)));

        if (event->property == None)
                goto fail;

        res = XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
                                 0, XMaxRequestSize(g_display), True, AnyPropertyType,
                                 &type, &format, &nitems, &bytes_left, &data);

        if (res != Success)
        {
                DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n"));
                goto fail;
        }

        /* Negotiate target format */
        if (event->target == targets_atom)
        {
                /* FIXME: We should choose format here based on what the server wanted */
                best_target = XA_STRING;
                if (type != None)
                {
                        supported_targets = (Atom *) data;
                        text_target = XInternAtom(g_display, "TEXT", False);
                        for (i = 0; i < nitems; i++)
                        {
                                DEBUG_CLIPBOARD(("Target %d: %s\n", i,
                                                 XGetAtomName(g_display, supported_targets[i])));
                                if (supported_targets[i] == text_target)
                                {
                                        DEBUG_CLIPBOARD(("Other party supports TEXT, choosing that as best_target\n"));
                                        best_target = text_target;
                                        break;
                                }
                        }
                        XFree(data);
                }

                XConvertSelection(g_display, primary_atom, best_target,
                                  rdesktop_clipboard_target_atom, g_wnd, event->time);
                return;
        }

        if (type == incr_atom)
        {
                DEBUG_CLIPBOARD(("Received INCR.\n"));

                XGetWindowAttributes(g_display, g_wnd, &wa);
                if ((wa.your_event_mask | PropertyChangeMask) != wa.your_event_mask)
                {
                        XSelectInput(g_display, g_wnd, (wa.your_event_mask | PropertyChangeMask));
                }
                XDeleteProperty(g_display, g_wnd, type);
                XFree(data);
                g_waiting_for_INCR = 1;

                if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, 0,
                                        4096L, True, AnyPropertyType,
                                        &type, &format, &nitems, &bytes_left, &data) != Success))
                {
                        DEBUG_CLIPBOARD(("XGetWindowProperty failed.\n"));
                        goto fail;
                }
                else
                {
                        uint8 *translated_data;
                        uint32 length = nitems;

                        translated_data = lf2crlf(data, &length);

                        g_clip_buffer = (uint8 *) xmalloc(length);
                        strncpy((char *) g_clip_buffer, (char *) translated_data, length);
                        xfree(translated_data);
                        g_clip_buflen = length;

                        XFree(data);
                        return;
                }
        }

        /* Translate linebreaks, but only if not getting data from
           other rdesktop instance */
        if (event->target != rdesktop_clipboard_formats_atom)
        {
                uint8 *translated_data;
                uint32 length = nitems;

                DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n"));
                translated_data = lf2crlf(data, &length);
                cliprdr_send_data(translated_data, length + 1);
                xfree(translated_data); /* Not the same thing as XFree! */
        }
        else
        {
                cliprdr_send_data(data, nitems + 1);
        }
        XFree(data);

        if (!rdesktop_is_selection_owner)
                cliprdr_send_text_format_announce();
        return;

      fail:
        cliprdr_send_data(NULL, 0);
}

void
xclip_handle_SelectionRequest(XSelectionRequestEvent * event)
{
        unsigned long nitems, bytes_left;
        unsigned char *prop_return;
        uint32 *wanted_format;
        int format, res;
        Atom type;

        DEBUG_CLIPBOARD(("xclip_handle_SelectionRequest: selection=%s, target=%s, property=%s\n",
                         XGetAtomName(g_display, event->selection),
                         XGetAtomName(g_display, event->target),
                         XGetAtomName(g_display, event->property)));

        if (event->target == targets_atom)
        {
                xclip_provide_selection(event, XA_ATOM, 32, (uint8 *) & targets, NUM_TARGETS);
                return;
        }
        else if (event->target == timestamp_atom)
        {
                xclip_provide_selection(event, XA_INTEGER, 32, (uint8 *) & g_last_gesturetime, 1);
                return;
        }
        else if (event->target == rdesktop_clipboard_formats_atom)
        {
                res = XGetWindowProperty(g_display, event->requestor,
                                         rdesktop_clipboard_target_atom, 0, 1, True, XA_INTEGER,
                                         &type, &format, &nitems, &bytes_left, &prop_return);
                wanted_format = (uint32 *) prop_return;
                format = (res == Success) ? *wanted_format : CF_TEXT;
                /* FIXME: Need to free returned data? */
        }
        else
        {
                format = CF_TEXT;
        }

        cliprdr_send_data_request(format);
        selection_request = *event;
        /* wait for data */
}

void
xclip_handle_SelectionClear(void)
{
        DEBUG_CLIPBOARD(("xclip_handle_SelectionClear\n"));
        have_primary = 0;
        XDeleteProperty(g_display, DefaultRootWindow(g_display), rdesktop_clipboard_formats_atom);
        cliprdr_send_text_format_announce();
}

void
xclip_handle_PropertyNotify(XPropertyEvent * event)
{
        unsigned long nitems, bytes_left;
        int format, res;
        XWindowAttributes wa;
        uint8 *data;
        Atom type;

        if (event->state == PropertyNewValue && g_waiting_for_INCR)
        {
                DEBUG_CLIPBOARD(("x_clip_handle_PropertyNotify: g_waiting_for_INCR != 0\n"));
                if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, 0,
                                        4096L, True, AnyPropertyType,
                                        &type, &format, &nitems, &bytes_left, &data) != Success))
                {
                        XFree(data);
                        return;
                }

                if (nitems == 0)
                {
                        XGetWindowAttributes(g_display, g_wnd, &wa);
                        XSelectInput(g_display, g_wnd, (wa.your_event_mask ^ PropertyChangeMask));
                        XFree(data);
                        g_waiting_for_INCR = 0;

                        if (g_clip_buflen > 0)
                        {
                                cliprdr_send_data(g_clip_buffer, g_clip_buflen + 1);

                                if (!rdesktop_is_selection_owner)
                                        cliprdr_send_text_format_announce();

                                xfree(g_clip_buffer);
                                g_clip_buffer = 0;
                                g_clip_buflen = 0;
                        }
                }
                else
                {
                        uint8 *translated_data;
                        uint32 length = nitems;
                        uint8 *tmp;

                        DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n"));
                        translated_data = lf2crlf(data, &length);

                        tmp = xmalloc(length + g_clip_buflen);
                        strncpy((char *) tmp, (char *) g_clip_buffer, g_clip_buflen);
                        xfree(g_clip_buffer);

                        strncpy((char *) (tmp + g_clip_buflen), (char *) translated_data, length);
                        xfree(translated_data);

                        g_clip_buffer = tmp;
                        g_clip_buflen += length;

                        XFree(data);
                        return;
                }
        }

        if (event->atom != rdesktop_clipboard_formats_atom)
                return;

        if (have_primary)       /* from us */
                return;

        if (event->state == PropertyNewValue)
        {
                res = XGetWindowProperty(g_display, DefaultRootWindow(g_display),
                                         rdesktop_clipboard_formats_atom, 0,
                                         XMaxRequestSize(g_display), False, XA_STRING, &type,
                                         &format, &nitems, &bytes_left, &data);

                if ((res == Success) && (nitems > 0))
                {
                        cliprdr_send_native_format_announce(data, nitems);
                        rdesktop_is_selection_owner = 1;
                        return;
                }
        }

        /* PropertyDelete, or XGetWindowProperty failed */
        cliprdr_send_text_format_announce();
        rdesktop_is_selection_owner = 0;
}


void
ui_clip_format_announce(uint8 * data, uint32 length)
{
        XSetSelectionOwner(g_display, primary_atom, g_wnd, g_last_gesturetime);
        if (XGetSelectionOwner(g_display, primary_atom) != g_wnd)
        {
                warning("Failed to aquire ownership of PRIMARY clipboard\n");
                return;
        }

        have_primary = 1;
        XChangeProperty(g_display, DefaultRootWindow(g_display),
                        rdesktop_clipboard_formats_atom, XA_STRING, 8, PropModeReplace, data,
                        length);

        XSetSelectionOwner(g_display, clipboard_atom, g_wnd, g_last_gesturetime);
        if (XGetSelectionOwner(g_display, clipboard_atom) != g_wnd)
                warning("Failed to aquire ownership of CLIPBOARD clipboard\n");
}


void
ui_clip_handle_data(uint8 * data, uint32 length)
{
        if (selection_request.target != rdesktop_clipboard_formats_atom)
        {
                uint8 *firstnull;

                /* translate linebreaks */
                crlf2lf(data, &length);

                /* Only send data up to null byte, if any */
                firstnull = (uint8 *) strchr((char *) data, '\0');
                if (firstnull)
                {
                        length = firstnull - data + 1;
                }
        }

        xclip_provide_selection(&selection_request, XA_STRING, 8, data, length - 1);
}

void
ui_clip_request_data(uint32 format)
{
        Window selectionowner;

        DEBUG_CLIPBOARD(("Request from server for format %d\n", format));

        if (rdesktop_is_selection_owner)
        {
                XChangeProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
                                XA_INTEGER, 32, PropModeReplace, (unsigned char *) &format, 1);

                XConvertSelection(g_display, primary_atom, rdesktop_clipboard_formats_atom,
                                  rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
                return;
        }

        selectionowner = XGetSelectionOwner(g_display, primary_atom);
        if (selectionowner != None)
        {
                XConvertSelection(g_display, primary_atom, targets_atom,
                                  rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
                return;
        }

        /* No PRIMARY, try CLIPBOARD */
        selectionowner = XGetSelectionOwner(g_display, clipboard_atom);
        if (selectionowner != None)
        {
                XConvertSelection(g_display, clipboard_atom, targets_atom,
                                  rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
                return;
        }

        /* No data available */
        cliprdr_send_data(NULL, 0);
}

void
ui_clip_sync(void)
{
        cliprdr_send_text_format_announce();
}


void
xclip_init(void)
{
        if (!cliprdr_init())
                return;

        primary_atom = XInternAtom(g_display, "PRIMARY", False);
        clipboard_atom = XInternAtom(g_display, "CLIPBOARD", False);
        targets_atom = XInternAtom(g_display, "TARGETS", False);
        timestamp_atom = XInternAtom(g_display, "TIMESTAMP", False);
        rdesktop_clipboard_target_atom =
                XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TARGET", False);
        incr_atom = XInternAtom(g_display, "INCR", False);
        targets[0] = targets_atom;
        targets[1] = XInternAtom(g_display, "TEXT", False);
        targets[2] = XInternAtom(g_display, "STRING", False);
        targets[3] = XInternAtom(g_display, "text/unicode", False);
        targets[4] = XInternAtom(g_display, "TIMESTAMP", False);
        targets[5] = XA_STRING;

        /* rdesktop sets _RDESKTOP_CLIPBOARD_FORMATS on the root window when acquiring the clipboard.
           Other interested rdesktops can use this to notify their server of the available formats. */
        rdesktop_clipboard_formats_atom =
                XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_FORMATS", False);
        XSelectInput(g_display, DefaultRootWindow(g_display), PropertyChangeMask);
}
1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3	Protocol services - Clipboard functions
4	Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003
5	Copyright (C) Matthew Chapman 2003
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20	*/
21
22	#include <X11/Xlib.h>
23	#include <X11/Xatom.h>
24	#include "rdesktop.h"
25
26	#define NUM_TARGETS 6
27
28	extern Display *g_display;
29	extern Window g_wnd;
30	extern Time g_last_gesturetime;
31
32	static Atom clipboard_atom, primary_atom, targets_atom, timestamp_atom;
33	static Atom rdesktop_clipboard_target_atom, rdesktop_clipboard_formats_atom, incr_atom;
34	static XSelectionRequestEvent selection_request;
35	static Atom targets[NUM_TARGETS];
36	static int have_primary = 0;
37	static int rdesktop_is_selection_owner = 0;
38
39	static int g_waiting_for_INCR = 0;
40	static uint8 *g_clip_buffer = 0;
41	static uint32 g_clip_buflen = 0;
42
43	/* Replace CR-LF to LF (well, rather removing all CR:s) This is done
44	in-place. The length is updated. Handles embedded nulls */
45	static void
46	crlf2lf(uint8 * data, uint32 * length)
47	{
48	uint8 dst, src;
49	src = dst = data;
50	while (src < data + *length)
51	{
52	if (*src != '\x0d')
53	dst++ = src;
54	src++;
55	}
56	*length = dst - data;
57	}
58
59	/* Translate LF to CR-LF. To do this, we must allocate more memory.
60	The length is updated. */
61	static uint8 *
62	lf2crlf(uint8 * data, uint32 * length)
63	{
64	uint8 result, p, *o;
65
66	/* Worst case: Every char is LF */
67	result = xmalloc(length 2);
68
69	p = data;
70	o = result;
71
72	while (p < data + *length)
73	{
74	if (*p == '\x0a')
75	*o++ = '\x0d';
76	o++ = p++;
77	}
78	*length = o - result;
79
80	/* Convenience */
81	*o++ = '\0';
82
83	return result;
84	}
85
86
87	static void
88	xclip_provide_selection(XSelectionRequestEvent * req, Atom type, unsigned int format, uint8 * data,
89	uint32 length)
90	{
91	XEvent xev;
92
93	XChangeProperty(g_display, req->requestor, req->property,
94	type, format, PropModeReplace, data, length);
95
96	xev.xselection.type = SelectionNotify;
97	xev.xselection.serial = 0;
98	xev.xselection.send_event = True;
99	xev.xselection.requestor = req->requestor;
100	xev.xselection.selection = req->selection;
101	xev.xselection.target = req->target;
102	xev.xselection.property = req->property;
103	xev.xselection.time = req->time;
104	XSendEvent(g_display, req->requestor, False, NoEventMask, &xev);
105	}
106
107	void
108	xclip_handle_SelectionNotify(XSelectionEvent * event)
109	{
110	unsigned long nitems, bytes_left;
111	XWindowAttributes wa;
112	Atom type, best_target, text_target;
113	Atom *supported_targets;
114	int res, i, format;
115	uint8 *data;
116
117	if (event->property == None)
118	goto fail;
119
120	DEBUG_CLIPBOARD(("xclip_handle_SelectionNotify: selection=%s, target=%s, property=%s\n",
121	XGetAtomName(g_display, event->selection),
122	XGetAtomName(g_display, event->target),
123	XGetAtomName(g_display, event->property)));
124
125	if (event->property == None)
126	goto fail;
127
128	res = XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
129	0, XMaxRequestSize(g_display), True, AnyPropertyType,
130	&type, &format, &nitems, &bytes_left, &data);
131
132	if (res != Success)
133	{
134	DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n"));
135	goto fail;
136	}
137
138	/* Negotiate target format */
139	if (event->target == targets_atom)
140	{
141	/* FIXME: We should choose format here based on what the server wanted */
142	best_target = XA_STRING;
143	if (type != None)
144	{
145	supported_targets = (Atom *) data;
146	text_target = XInternAtom(g_display, "TEXT", False);
147	for (i = 0; i < nitems; i++)
148	{
149	DEBUG_CLIPBOARD(("Target %d: %s\n", i,
150	XGetAtomName(g_display, supported_targets[i])));
151	if (supported_targets[i] == text_target)
152	{
153	DEBUG_CLIPBOARD(("Other party supports TEXT, choosing that as best_target\n"));
154	best_target = text_target;
155	break;
156	}
157	}
158	XFree(data);
159	}
160
161	XConvertSelection(g_display, primary_atom, best_target,
162	rdesktop_clipboard_target_atom, g_wnd, event->time);
163	return;
164	}
165
166	if (type == incr_atom)
167	{
168	DEBUG_CLIPBOARD(("Received INCR.\n"));
169
170	XGetWindowAttributes(g_display, g_wnd, &wa);
171	if ((wa.your_event_mask \| PropertyChangeMask) != wa.your_event_mask)
172	{
173	XSelectInput(g_display, g_wnd, (wa.your_event_mask \| PropertyChangeMask));
174	}
175	XDeleteProperty(g_display, g_wnd, type);
176	XFree(data);
177	g_waiting_for_INCR = 1;
178
179	if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, 0,
180	4096L, True, AnyPropertyType,
181	&type, &format, &nitems, &bytes_left, &data) != Success))
182	{
183	DEBUG_CLIPBOARD(("XGetWindowProperty failed.\n"));
184	goto fail;
185	}
186	else
187	{
188	uint8 *translated_data;
189	uint32 length = nitems;
190
191	translated_data = lf2crlf(data, &length);
192
193	g_clip_buffer = (uint8 *) xmalloc(length);
194	strncpy((char ) g_clip_buffer, (char ) translated_data, length);
195	xfree(translated_data);
196	g_clip_buflen = length;
197
198	XFree(data);
199	return;
200	}
201	}
202
203	/* Translate linebreaks, but only if not getting data from
204	other rdesktop instance */
205	if (event->target != rdesktop_clipboard_formats_atom)
206	{
207	uint8 *translated_data;
208	uint32 length = nitems;
209
210	DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n"));
211	translated_data = lf2crlf(data, &length);
212	cliprdr_send_data(translated_data, length + 1);
213	xfree(translated_data); /* Not the same thing as XFree! */
214	}
215	else
216	{
217	cliprdr_send_data(data, nitems + 1);
218	}
219	XFree(data);
220
221	if (!rdesktop_is_selection_owner)
222	cliprdr_send_text_format_announce();
223	return;
224
225	fail:
226	cliprdr_send_data(NULL, 0);
227	}
228
229	void
230	xclip_handle_SelectionRequest(XSelectionRequestEvent * event)
231	{
232	unsigned long nitems, bytes_left;
233	unsigned char *prop_return;
234	uint32 *wanted_format;
235	int format, res;
236	Atom type;
237
238	DEBUG_CLIPBOARD(("xclip_handle_SelectionRequest: selection=%s, target=%s, property=%s\n",
239	XGetAtomName(g_display, event->selection),
240	XGetAtomName(g_display, event->target),
241	XGetAtomName(g_display, event->property)));
242
243	if (event->target == targets_atom)
244	{
245	xclip_provide_selection(event, XA_ATOM, 32, (uint8 *) & targets, NUM_TARGETS);
246	return;
247	}
248	else if (event->target == timestamp_atom)
249	{
250	xclip_provide_selection(event, XA_INTEGER, 32, (uint8 *) & g_last_gesturetime, 1);
251	return;
252	}
253	else if (event->target == rdesktop_clipboard_formats_atom)
254	{
255	res = XGetWindowProperty(g_display, event->requestor,
256	rdesktop_clipboard_target_atom, 0, 1, True, XA_INTEGER,
257	&type, &format, &nitems, &bytes_left, &prop_return);
258	wanted_format = (uint32 *) prop_return;
259	format = (res == Success) ? *wanted_format : CF_TEXT;
260	/* FIXME: Need to free returned data? */
261	}
262	else
263	{
264	format = CF_TEXT;
265	}
266
267	cliprdr_send_data_request(format);
268	selection_request = *event;
269	/* wait for data */
270	}
271
272	void
273	xclip_handle_SelectionClear(void)
274	{
275	DEBUG_CLIPBOARD(("xclip_handle_SelectionClear\n"));
276	have_primary = 0;
277	XDeleteProperty(g_display, DefaultRootWindow(g_display), rdesktop_clipboard_formats_atom);
278	cliprdr_send_text_format_announce();
279	}
280
281	void
282	xclip_handle_PropertyNotify(XPropertyEvent * event)
283	{
284	unsigned long nitems, bytes_left;
285	int format, res;
286	XWindowAttributes wa;
287	uint8 *data;
288	Atom type;
289
290	if (event->state == PropertyNewValue && g_waiting_for_INCR)
291	{
292	DEBUG_CLIPBOARD(("x_clip_handle_PropertyNotify: g_waiting_for_INCR != 0\n"));
293	if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, 0,
294	4096L, True, AnyPropertyType,
295	&type, &format, &nitems, &bytes_left, &data) != Success))
296	{
297	XFree(data);
298	return;
299	}
300
301	if (nitems == 0)
302	{
303	XGetWindowAttributes(g_display, g_wnd, &wa);
304	XSelectInput(g_display, g_wnd, (wa.your_event_mask ^ PropertyChangeMask));
305	XFree(data);
306	g_waiting_for_INCR = 0;
307
308	if (g_clip_buflen > 0)
309	{
310	cliprdr_send_data(g_clip_buffer, g_clip_buflen + 1);
311
312	if (!rdesktop_is_selection_owner)
313	cliprdr_send_text_format_announce();
314
315	xfree(g_clip_buffer);
316	g_clip_buffer = 0;
317	g_clip_buflen = 0;
318	}
319	}
320	else
321	{
322	uint8 *translated_data;
323	uint32 length = nitems;
324	uint8 *tmp;
325
326	DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n"));
327	translated_data = lf2crlf(data, &length);
328
329	tmp = xmalloc(length + g_clip_buflen);
330	strncpy((char ) tmp, (char ) g_clip_buffer, g_clip_buflen);
331	xfree(g_clip_buffer);
332
333	strncpy((char ) (tmp + g_clip_buflen), (char ) translated_data, length);
334	xfree(translated_data);
335
336	g_clip_buffer = tmp;
337	g_clip_buflen += length;
338
339	XFree(data);
340	return;
341	}
342	}
343
344	if (event->atom != rdesktop_clipboard_formats_atom)
345	return;
346
347	if (have_primary) /* from us */
348	return;
349
350	if (event->state == PropertyNewValue)
351	{
352	res = XGetWindowProperty(g_display, DefaultRootWindow(g_display),
353	rdesktop_clipboard_formats_atom, 0,
354	XMaxRequestSize(g_display), False, XA_STRING, &type,
355	&format, &nitems, &bytes_left, &data);
356
357	if ((res == Success) && (nitems > 0))
358	{
359	cliprdr_send_native_format_announce(data, nitems);
360	rdesktop_is_selection_owner = 1;
361	return;
362	}
363	}
364
365	/* PropertyDelete, or XGetWindowProperty failed */
366	cliprdr_send_text_format_announce();
367	rdesktop_is_selection_owner = 0;
368	}
369
370
371	void
372	ui_clip_format_announce(uint8 * data, uint32 length)
373	{
374	XSetSelectionOwner(g_display, primary_atom, g_wnd, g_last_gesturetime);
375	if (XGetSelectionOwner(g_display, primary_atom) != g_wnd)
376	{
377	warning("Failed to aquire ownership of PRIMARY clipboard\n");
378	return;
379	}
380
381	have_primary = 1;
382	XChangeProperty(g_display, DefaultRootWindow(g_display),
383	rdesktop_clipboard_formats_atom, XA_STRING, 8, PropModeReplace, data,
384	length);
385
386	XSetSelectionOwner(g_display, clipboard_atom, g_wnd, g_last_gesturetime);
387	if (XGetSelectionOwner(g_display, clipboard_atom) != g_wnd)
388	warning("Failed to aquire ownership of CLIPBOARD clipboard\n");
389	}
390
391
392	void
393	ui_clip_handle_data(uint8 * data, uint32 length)
394	{
395	if (selection_request.target != rdesktop_clipboard_formats_atom)
396	{
397	uint8 *firstnull;
398
399	/* translate linebreaks */
400	crlf2lf(data, &length);
401
402	/* Only send data up to null byte, if any */
403	firstnull = (uint8 ) strchr((char ) data, '\0');
404	if (firstnull)
405	{
406	length = firstnull - data + 1;
407	}
408	}
409
410	xclip_provide_selection(&selection_request, XA_STRING, 8, data, length - 1);
411	}
412
413	void
414	ui_clip_request_data(uint32 format)
415	{
416	Window selectionowner;
417
418	DEBUG_CLIPBOARD(("Request from server for format %d\n", format));
419
420	if (rdesktop_is_selection_owner)
421	{
422	XChangeProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
423	XA_INTEGER, 32, PropModeReplace, (unsigned char *) &format, 1);
424
425	XConvertSelection(g_display, primary_atom, rdesktop_clipboard_formats_atom,
426	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
427	return;
428	}
429
430	selectionowner = XGetSelectionOwner(g_display, primary_atom);
431	if (selectionowner != None)
432	{
433	XConvertSelection(g_display, primary_atom, targets_atom,
434	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
435	return;
436	}
437
438	/* No PRIMARY, try CLIPBOARD */
439	selectionowner = XGetSelectionOwner(g_display, clipboard_atom);
440	if (selectionowner != None)
441	{
442	XConvertSelection(g_display, clipboard_atom, targets_atom,
443	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
444	return;
445	}
446
447	/* No data available */
448	cliprdr_send_data(NULL, 0);
449	}
450
451	void
452	ui_clip_sync(void)
453	{
454	cliprdr_send_text_format_announce();
455	}
456
457
458	void
459	xclip_init(void)
460	{
461	if (!cliprdr_init())
462	return;
463
464	primary_atom = XInternAtom(g_display, "PRIMARY", False);
465	clipboard_atom = XInternAtom(g_display, "CLIPBOARD", False);
466	targets_atom = XInternAtom(g_display, "TARGETS", False);
467	timestamp_atom = XInternAtom(g_display, "TIMESTAMP", False);
468	rdesktop_clipboard_target_atom =
469	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TARGET", False);
470	incr_atom = XInternAtom(g_display, "INCR", False);
471	targets[0] = targets_atom;
472	targets[1] = XInternAtom(g_display, "TEXT", False);
473	targets[2] = XInternAtom(g_display, "STRING", False);
474	targets[3] = XInternAtom(g_display, "text/unicode", False);
475	targets[4] = XInternAtom(g_display, "TIMESTAMP", False);
476	targets[5] = XA_STRING;
477
478	/* rdesktop sets _RDESKTOP_CLIPBOARD_FORMATS on the root window when acquiring the clipboard.
479	Other interested rdesktops can use this to notify their server of the available formats. */
480	rdesktop_clipboard_formats_atom =
481	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_FORMATS", False);
482	XSelectInput(g_display, DefaultRootWindow(g_display), PropertyChangeMask);
483	}