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);
}

#ifndef MAKE_PROTO
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_simple_native_format_announce(CF_TEXT);
        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_simple_native_format_announce(CF_TEXT);
}

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_simple_native_format_announce(CF_TEXT);

                                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_simple_native_format_announce(CF_TEXT);
        rdesktop_is_selection_owner = 0;
}
#endif


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_simple_native_format_announce(CF_TEXT);
}


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	#ifndef MAKE_PROTO
108	void
109	xclip_handle_SelectionNotify(XSelectionEvent * event)
110	{
111	unsigned long nitems, bytes_left;
112	XWindowAttributes wa;
113	Atom type, best_target, text_target;
114	Atom *supported_targets;
115	int res, i, format;
116	uint8 *data;
117
118	if (event->property == None)
119	goto fail;
120
121	DEBUG_CLIPBOARD(("xclip_handle_SelectionNotify: selection=%s, target=%s, property=%s\n",
122	XGetAtomName(g_display, event->selection),
123	XGetAtomName(g_display, event->target),
124	XGetAtomName(g_display, event->property)));
125
126	if (event->property == None)
127	goto fail;
128
129	res = XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
130	0, XMaxRequestSize(g_display), True, AnyPropertyType,
131	&type, &format, &nitems, &bytes_left, &data);
132
133	if (res != Success)
134	{
135	DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n"));
136	goto fail;
137	}
138
139	/* Negotiate target format */
140	if (event->target == targets_atom)
141	{
142	/* FIXME: We should choose format here based on what the server wanted */
143	best_target = XA_STRING;
144	if (type != None)
145	{
146	supported_targets = (Atom *) data;
147	text_target = XInternAtom(g_display, "TEXT", False);
148	for (i = 0; i < nitems; i++)
149	{
150	DEBUG_CLIPBOARD(("Target %d: %s\n", i,
151	XGetAtomName(g_display, supported_targets[i])));
152	if (supported_targets[i] == text_target)
153	{
154	DEBUG_CLIPBOARD(("Other party supports TEXT, choosing that as best_target\n"));
155	best_target = text_target;
156	break;
157	}
158	}
159	XFree(data);
160	}
161
162	XConvertSelection(g_display, primary_atom, best_target,
163	rdesktop_clipboard_target_atom, g_wnd, event->time);
164	return;
165	}
166
167	if (type == incr_atom)
168	{
169	DEBUG_CLIPBOARD(("Received INCR.\n"));
170
171	XGetWindowAttributes(g_display, g_wnd, &wa);
172	if ((wa.your_event_mask \| PropertyChangeMask) != wa.your_event_mask)
173	{
174	XSelectInput(g_display, g_wnd, (wa.your_event_mask \| PropertyChangeMask));
175	}
176	XDeleteProperty(g_display, g_wnd, type);
177	XFree(data);
178	g_waiting_for_INCR = 1;
179
180	if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, 0,
181	4096L, True, AnyPropertyType,
182	&type, &format, &nitems, &bytes_left, &data) != Success))
183	{
184	DEBUG_CLIPBOARD(("XGetWindowProperty failed.\n"));
185	goto fail;
186	}
187	else
188	{
189	uint8 *translated_data;
190	uint32 length = nitems;
191
192	translated_data = lf2crlf(data, &length);
193
194	g_clip_buffer = (uint8 *) xmalloc(length);
195	strncpy((char ) g_clip_buffer, (char ) translated_data, length);
196	xfree(translated_data);
197	g_clip_buflen = length;
198
199	XFree(data);
200	return;
201	}
202	}
203
204	/* Translate linebreaks, but only if not getting data from
205	other rdesktop instance */
206	if (event->target != rdesktop_clipboard_formats_atom)
207	{
208	uint8 *translated_data;
209	uint32 length = nitems;
210
211	DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n"));
212	translated_data = lf2crlf(data, &length);
213	cliprdr_send_data(translated_data, length + 1);
214	xfree(translated_data); /* Not the same thing as XFree! */
215	}
216	else
217	{
218	cliprdr_send_data(data, nitems + 1);
219	}
220	XFree(data);
221
222	if (!rdesktop_is_selection_owner)
223	cliprdr_send_simple_native_format_announce(CF_TEXT);
224	return;
225
226	fail:
227	cliprdr_send_data(NULL, 0);
228	}
229
230	void
231	xclip_handle_SelectionRequest(XSelectionRequestEvent * event)
232	{
233	unsigned long nitems, bytes_left;
234	unsigned char *prop_return;
235	uint32 *wanted_format;
236	int format, res;
237	Atom type;
238
239	DEBUG_CLIPBOARD(("xclip_handle_SelectionRequest: selection=%s, target=%s, property=%s\n",
240	XGetAtomName(g_display, event->selection),
241	XGetAtomName(g_display, event->target),
242	XGetAtomName(g_display, event->property)));
243
244	if (event->target == targets_atom)
245	{
246	xclip_provide_selection(event, XA_ATOM, 32, (uint8 *) & targets, NUM_TARGETS);
247	return;
248	}
249	else if (event->target == timestamp_atom)
250	{
251	xclip_provide_selection(event, XA_INTEGER, 32, (uint8 *) & g_last_gesturetime, 1);
252	return;
253	}
254	else if (event->target == rdesktop_clipboard_formats_atom)
255	{
256	res = XGetWindowProperty(g_display, event->requestor,
257	rdesktop_clipboard_target_atom, 0, 1, True, XA_INTEGER,
258	&type, &format, &nitems, &bytes_left, &prop_return);
259	wanted_format = (uint32 *) prop_return;
260	format = (res == Success) ? *wanted_format : CF_TEXT;
261	/* FIXME: Need to free returned data? */
262	}
263	else
264	{
265	format = CF_TEXT;
266	}
267
268	cliprdr_send_data_request(format);
269	selection_request = *event;
270	/* wait for data */
271	}
272
273	void
274	xclip_handle_SelectionClear(void)
275	{
276	DEBUG_CLIPBOARD(("xclip_handle_SelectionClear\n"));
277	have_primary = 0;
278	XDeleteProperty(g_display, DefaultRootWindow(g_display), rdesktop_clipboard_formats_atom);
279	cliprdr_send_simple_native_format_announce(CF_TEXT);
280	}
281
282	void
283	xclip_handle_PropertyNotify(XPropertyEvent * event)
284	{
285	unsigned long nitems, bytes_left;
286	int format, res;
287	XWindowAttributes wa;
288	uint8 *data;
289	Atom type;
290
291	if (event->state == PropertyNewValue && g_waiting_for_INCR)
292	{
293	DEBUG_CLIPBOARD(("x_clip_handle_PropertyNotify: g_waiting_for_INCR != 0\n"));
294	if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, 0,
295	4096L, True, AnyPropertyType,
296	&type, &format, &nitems, &bytes_left, &data) != Success))
297	{
298	XFree(data);
299	return;
300	}
301
302	if (nitems == 0)
303	{
304	XGetWindowAttributes(g_display, g_wnd, &wa);
305	XSelectInput(g_display, g_wnd, (wa.your_event_mask ^ PropertyChangeMask));
306	XFree(data);
307	g_waiting_for_INCR = 0;
308
309	if (g_clip_buflen > 0)
310	{
311	cliprdr_send_data(g_clip_buffer, g_clip_buflen + 1);
312
313	if (!rdesktop_is_selection_owner)
314	cliprdr_send_simple_native_format_announce(CF_TEXT);
315
316	xfree(g_clip_buffer);
317	g_clip_buffer = 0;
318	g_clip_buflen = 0;
319	}
320	}
321	else
322	{
323	uint8 *translated_data;
324	uint32 length = nitems;
325	uint8 *tmp;
326
327	DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n"));
328	translated_data = lf2crlf(data, &length);
329
330	tmp = xmalloc(length + g_clip_buflen);
331	strncpy((char ) tmp, (char ) g_clip_buffer, g_clip_buflen);
332	xfree(g_clip_buffer);
333
334	strncpy((char ) (tmp + g_clip_buflen), (char ) translated_data, length);
335	xfree(translated_data);
336
337	g_clip_buffer = tmp;
338	g_clip_buflen += length;
339
340	XFree(data);
341	return;
342	}
343	}
344
345	if (event->atom != rdesktop_clipboard_formats_atom)
346	return;
347
348	if (have_primary) /* from us */
349	return;
350
351	if (event->state == PropertyNewValue)
352	{
353	res = XGetWindowProperty(g_display, DefaultRootWindow(g_display),
354	rdesktop_clipboard_formats_atom, 0,
355	XMaxRequestSize(g_display), False, XA_STRING, &type,
356	&format, &nitems, &bytes_left, &data);
357
358	if ((res == Success) && (nitems > 0))
359	{
360	cliprdr_send_native_format_announce(data, nitems);
361	rdesktop_is_selection_owner = 1;
362	return;
363	}
364	}
365
366	/* PropertyDelete, or XGetWindowProperty failed */
367	cliprdr_send_simple_native_format_announce(CF_TEXT);
368	rdesktop_is_selection_owner = 0;
369	}
370	#endif
371
372
373	void
374	ui_clip_format_announce(uint8 * data, uint32 length)
375	{
376	XSetSelectionOwner(g_display, primary_atom, g_wnd, g_last_gesturetime);
377	if (XGetSelectionOwner(g_display, primary_atom) != g_wnd)
378	{
379	warning("Failed to aquire ownership of PRIMARY clipboard\n");
380	return;
381	}
382
383	have_primary = 1;
384	XChangeProperty(g_display, DefaultRootWindow(g_display),
385	rdesktop_clipboard_formats_atom, XA_STRING, 8, PropModeReplace, data,
386	length);
387
388	XSetSelectionOwner(g_display, clipboard_atom, g_wnd, g_last_gesturetime);
389	if (XGetSelectionOwner(g_display, clipboard_atom) != g_wnd)
390	warning("Failed to aquire ownership of CLIPBOARD clipboard\n");
391	}
392
393
394	void
395	ui_clip_handle_data(uint8 * data, uint32 length)
396	{
397	if (selection_request.target != rdesktop_clipboard_formats_atom)
398	{
399	uint8 *firstnull;
400
401	/* translate linebreaks */
402	crlf2lf(data, &length);
403
404	/* Only send data up to null byte, if any */
405	firstnull = (uint8 ) strchr((char ) data, '\0');
406	if (firstnull)
407	{
408	length = firstnull - data + 1;
409	}
410	}
411
412	xclip_provide_selection(&selection_request, XA_STRING, 8, data, length - 1);
413	}
414
415	void
416	ui_clip_request_data(uint32 format)
417	{
418	Window selectionowner;
419
420	DEBUG_CLIPBOARD(("Request from server for format %d\n", format));
421
422	if (rdesktop_is_selection_owner)
423	{
424	XChangeProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
425	XA_INTEGER, 32, PropModeReplace, (unsigned char *) &format, 1);
426
427	XConvertSelection(g_display, primary_atom, rdesktop_clipboard_formats_atom,
428	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
429	return;
430	}
431
432	selectionowner = XGetSelectionOwner(g_display, primary_atom);
433	if (selectionowner != None)
434	{
435	XConvertSelection(g_display, primary_atom, targets_atom,
436	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
437	return;
438	}
439
440	/* No PRIMARY, try CLIPBOARD */
441	selectionowner = XGetSelectionOwner(g_display, clipboard_atom);
442	if (selectionowner != None)
443	{
444	XConvertSelection(g_display, clipboard_atom, targets_atom,
445	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
446	return;
447	}
448
449	/* No data available */
450	cliprdr_send_data(NULL, 0);
451	}
452
453	void
454	ui_clip_sync(void)
455	{
456	cliprdr_send_simple_native_format_announce(CF_TEXT);
457	}
458
459
460	void
461	xclip_init(void)
462	{
463	if (!cliprdr_init())
464	return;
465
466	primary_atom = XInternAtom(g_display, "PRIMARY", False);
467	clipboard_atom = XInternAtom(g_display, "CLIPBOARD", False);
468	targets_atom = XInternAtom(g_display, "TARGETS", False);
469	timestamp_atom = XInternAtom(g_display, "TIMESTAMP", False);
470	rdesktop_clipboard_target_atom =
471	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TARGET", False);
472	incr_atom = XInternAtom(g_display, "INCR", False);
473	targets[0] = targets_atom;
474	targets[1] = XInternAtom(g_display, "TEXT", False);
475	targets[2] = XInternAtom(g_display, "STRING", False);
476	targets[3] = XInternAtom(g_display, "text/unicode", False);
477	targets[4] = XInternAtom(g_display, "TIMESTAMP", False);
478	targets[5] = XA_STRING;
479
480	/* rdesktop sets _RDESKTOP_CLIPBOARD_FORMATS on the root window when acquiring the clipboard.
481	Other interested rdesktops can use this to notify their server of the available formats. */
482	rdesktop_clipboard_formats_atom =
483	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_FORMATS", False);
484	XSelectInput(g_display, DefaultRootWindow(g_display), PropertyChangeMask);
485	}