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 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);
}

static void
xclip_handle_SelectionNotify(XSelectionEvent * event)
{
        unsigned long nitems, bytes_left;
        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;
        }

        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;
                                }
                        }
                        XFree(data);
                }

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

        if (type == incr_atom)
        {
                warning("We don't support INCR transfers at this time. Try cutting less data.\n");
                goto fail;
        }

        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);
}

static void
xclip_handle_SelectionRequest(XSelectionRequestEvent * event)
{
        unsigned long nitems, bytes_left;
        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,
                                         (unsigned char **) &wanted_format);
                format = (res == Success) ? *wanted_format : CF_TEXT;
        }
        else
        {
                format = CF_TEXT;
        }

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

static 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();
}

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

        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(char *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(char *data, uint32 length)
{
        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, "UTF8_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	matthewc	432	/* -- 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	jsorg71	450	extern Display *g_display;
29			extern Window g_wnd;
30			extern Time g_last_gesturetime;
31	matthewc	432
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 void
40	astrand	435	xclip_provide_selection(XSelectionRequestEvent * req, Atom type, unsigned int format, uint8 * data,
41			uint32 length)
42	matthewc	432	{
43			XEvent xev;
44
45	jsorg71	450	XChangeProperty(g_display, req->requestor, req->property,
46	matthewc	432	type, format, PropModeReplace, data, length);
47
48			xev.xselection.type = SelectionNotify;
49			xev.xselection.serial = 0;
50			xev.xselection.send_event = True;
51			xev.xselection.requestor = req->requestor;
52			xev.xselection.selection = req->selection;
53			xev.xselection.target = req->target;
54			xev.xselection.property = req->property;
55			xev.xselection.time = req->time;
56	jsorg71	450	XSendEvent(g_display, req->requestor, False, NoEventMask, &xev);
57	matthewc	432	}
58
59	astrand	459	static void
60	matthewc	432	xclip_handle_SelectionNotify(XSelectionEvent * event)
61			{
62			unsigned long nitems, bytes_left;
63			Atom type, best_target, text_target;
64			Atom *supported_targets;
65			int res, i, format;
66			uint8 *data;
67
68			if (event->property == None)
69			goto fail;
70
71			DEBUG_CLIPBOARD(("xclip_handle_SelectionNotify: selection=%s, target=%s, property=%s\n",
72	jsorg71	450	XGetAtomName(g_display, event->selection),
73			XGetAtomName(g_display, event->target),
74			XGetAtomName(g_display, event->property)));
75	matthewc	432
76			if (event->property == None)
77			goto fail;
78
79	jsorg71	450	res = XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
80			0, XMaxRequestSize(g_display), True, AnyPropertyType,
81	matthewc	432	&type, &format, &nitems, &bytes_left, &data);
82
83			if (res != Success)
84			{
85			DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n"));
86			goto fail;
87			}
88
89			if (event->target == targets_atom)
90			{
91			/* FIXME: We should choose format here based on what the server wanted */
92			best_target = XA_STRING;
93			if (type != None)
94			{
95			supported_targets = (Atom *) data;
96	jsorg71	450	text_target = XInternAtom(g_display, "TEXT", False);
97	matthewc	432	for (i = 0; i < nitems; i++)
98			{
99	astrand	435	DEBUG_CLIPBOARD(("Target %d: %s\n", i,
100	jsorg71	450	XGetAtomName(g_display, supported_targets[i])));
101	matthewc	432	if (supported_targets[i] == text_target)
102			{
103			DEBUG_CLIPBOARD(("Other party supports TEXT, choosing that as best_target\n"));
104			best_target = text_target;
105			}
106			}
107			XFree(data);
108			}
109
110	jsorg71	450	XConvertSelection(g_display, primary_atom, best_target,
111			rdesktop_clipboard_target_atom, g_wnd, event->time);
112	matthewc	432	return;
113			}
114
115			if (type == incr_atom)
116			{
117			warning("We don't support INCR transfers at this time. Try cutting less data.\n");
118			goto fail;
119			}
120
121	astrand	435	cliprdr_send_data(data, nitems + 1);
122	matthewc	432	XFree(data);
123
124			if (!rdesktop_is_selection_owner)
125			cliprdr_send_text_format_announce();
126			return;
127
128	astrand	435	fail:
129	matthewc	432	cliprdr_send_data(NULL, 0);
130			}
131
132	astrand	459	static void
133	astrand	435	xclip_handle_SelectionRequest(XSelectionRequestEvent * event)
134	matthewc	432	{
135			unsigned long nitems, bytes_left;
136			uint32 *wanted_format;
137			int format, res;
138			Atom type;
139
140			DEBUG_CLIPBOARD(("xclip_handle_SelectionRequest: selection=%s, target=%s, property=%s\n",
141	jsorg71	450	XGetAtomName(g_display, event->selection),
142			XGetAtomName(g_display, event->target),
143			XGetAtomName(g_display, event->property)));
144	matthewc	432
145			if (event->target == targets_atom)
146			{
147	astrand	435	xclip_provide_selection(event, XA_ATOM, 32, (uint8 *) & targets, NUM_TARGETS);
148	matthewc	432	return;
149			}
150			else if (event->target == timestamp_atom)
151			{
152	jsorg71	450	xclip_provide_selection(event, XA_INTEGER, 32, (uint8 *) & g_last_gesturetime, 1);
153	matthewc	432	return;
154			}
155			else if (event->target == rdesktop_clipboard_formats_atom)
156			{
157	jsorg71	450	res = XGetWindowProperty(g_display, event->requestor,
158	astrand	435	rdesktop_clipboard_target_atom, 0, 1, True, XA_INTEGER,
159			&type, &format, &nitems, &bytes_left,
160			(unsigned char **) &wanted_format);
161	matthewc	432	format = (res == Success) ? *wanted_format : CF_TEXT;
162			}
163			else
164			{
165			format = CF_TEXT;
166			}
167
168			cliprdr_send_data_request(format);
169			selection_request = *event;
170			/* wait for data */
171			}
172
173	astrand	459	static void
174	matthewc	432	xclip_handle_SelectionClear(void)
175			{
176			DEBUG_CLIPBOARD(("xclip_handle_SelectionClear\n"));
177			have_primary = 0;
178	jsorg71	450	XDeleteProperty(g_display, DefaultRootWindow(g_display), rdesktop_clipboard_formats_atom);
179	matthewc	432	cliprdr_send_text_format_announce();
180			}
181
182	astrand	459	static void
183	astrand	435	xclip_handle_PropertyNotify(XPropertyEvent * event)
184	matthewc	432	{
185			unsigned long nitems, bytes_left;
186			int format, res;
187			uint8 *data;
188			Atom type;
189
190			if (event->atom != rdesktop_clipboard_formats_atom)
191			return;
192
193	astrand	435	if (have_primary) /* from us */
194	matthewc	432	return;
195
196			if (event->state == PropertyNewValue)
197			{
198	jsorg71	450	res = XGetWindowProperty(g_display, DefaultRootWindow(g_display),
199	astrand	435	rdesktop_clipboard_formats_atom, 0,
200	astrand	456	XMaxRequestSize(g_display), False, XA_STRING, &type,
201			&format, &nitems, &bytes_left, &data);
202	matthewc	432
203			if ((res == Success) && (nitems > 0))
204			{
205			cliprdr_send_native_format_announce(data, nitems);
206			rdesktop_is_selection_owner = 1;
207			return;
208			}
209			}
210
211			/* PropertyDelete, or XGetWindowProperty failed */
212			cliprdr_send_text_format_announce();
213			rdesktop_is_selection_owner = 0;
214			}
215
216
217			void
218			ui_clip_format_announce(char *data, uint32 length)
219			{
220	jsorg71	450	XSetSelectionOwner(g_display, primary_atom, g_wnd, g_last_gesturetime);
221			if (XGetSelectionOwner(g_display, primary_atom) != g_wnd)
222	matthewc	432	{
223			warning("Failed to aquire ownership of PRIMARY clipboard\n");
224			return;
225			}
226
227			have_primary = 1;
228	jsorg71	450	XChangeProperty(g_display, DefaultRootWindow(g_display),
229	astrand	435	rdesktop_clipboard_formats_atom, XA_STRING, 8, PropModeReplace, data,
230			length);
231	matthewc	432
232	jsorg71	450	XSetSelectionOwner(g_display, clipboard_atom, g_wnd, g_last_gesturetime);
233			if (XGetSelectionOwner(g_display, clipboard_atom) != g_wnd)
234	matthewc	432	warning("Failed to aquire ownership of CLIPBOARD clipboard\n");
235			}
236
237
238			void
239			ui_clip_handle_data(char *data, uint32 length)
240			{
241	astrand	435	xclip_provide_selection(&selection_request, XA_STRING, 8, data, length - 1);
242	matthewc	432	}
243
244			void
245			ui_clip_request_data(uint32 format)
246			{
247			Window selectionowner;
248
249			DEBUG_CLIPBOARD(("Request from server for format %d\n", format));
250
251			if (rdesktop_is_selection_owner)
252			{
253	jsorg71	450	XChangeProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
254	matthewc	432	XA_INTEGER, 32, PropModeReplace, (unsigned char *) &format, 1);
255
256	jsorg71	450	XConvertSelection(g_display, primary_atom, rdesktop_clipboard_formats_atom,
257			rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
258	matthewc	432	return;
259			}
260
261	jsorg71	450	selectionowner = XGetSelectionOwner(g_display, primary_atom);
262	matthewc	432	if (selectionowner != None)
263			{
264	jsorg71	450	XConvertSelection(g_display, primary_atom, targets_atom,
265			rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
266	matthewc	432	return;
267			}
268
269			/* No PRIMARY, try CLIPBOARD */
270	jsorg71	450	selectionowner = XGetSelectionOwner(g_display, clipboard_atom);
271	matthewc	432	if (selectionowner != None)
272			{
273	jsorg71	450	XConvertSelection(g_display, clipboard_atom, targets_atom,
274			rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
275	matthewc	432	return;
276			}
277
278			/* No data available */
279			cliprdr_send_data(NULL, 0);
280			}
281
282			void
283			ui_clip_sync(void)
284			{
285			cliprdr_send_text_format_announce();
286			}
287
288
289			void
290			xclip_init(void)
291			{
292			if (!cliprdr_init())
293			return;
294
295	jsorg71	450	primary_atom = XInternAtom(g_display, "PRIMARY", False);
296			clipboard_atom = XInternAtom(g_display, "CLIPBOARD", False);
297			targets_atom = XInternAtom(g_display, "TARGETS", False);
298			timestamp_atom = XInternAtom(g_display, "TIMESTAMP", False);
299	astrand	456	rdesktop_clipboard_target_atom =
300			XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TARGET", False);
301	jsorg71	450	incr_atom = XInternAtom(g_display, "INCR", False);
302	matthewc	432	targets[0] = targets_atom;
303	jsorg71	450	targets[1] = XInternAtom(g_display, "TEXT", False);
304			targets[2] = XInternAtom(g_display, "UTF8_STRING", False);
305			targets[3] = XInternAtom(g_display, "text/unicode", False);
306			targets[4] = XInternAtom(g_display, "TIMESTAMP", False);
307	matthewc	432	targets[5] = XA_STRING;
308
309			/* rdesktop sets _RDESKTOP_CLIPBOARD_FORMATS on the root window when acquiring the clipboard.
310			Other interested rdesktops can use this to notify their server of the available formats. */
311	astrand	435	rdesktop_clipboard_formats_atom =
312	jsorg71	450	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_FORMATS", False);
313			XSelectInput(g_display, DefaultRootWindow(g_display), PropertyChangeMask);
314	matthewc	432	}