trunk/rdesktop/ewmhints.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.

   Support functions for Extended Window Manager Hints,
   http://www.freedesktop.org/wiki/Standards_2fwm_2dspec

   Copyright 2005 Peter Astrand <astrand@cendio.se> for Cendio AB
   Copyright 2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
   
   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 <X11/Xutil.h>
#include "rdesktop.h"

#define _NET_WM_STATE_REMOVE        0   /* remove/unset property */
#define _NET_WM_STATE_ADD           1   /* add/set property */
#define _NET_WM_STATE_TOGGLE        2   /* toggle property  */

extern Display *g_display;

static Atom g_net_wm_state_maximized_vert_atom, g_net_wm_state_maximized_horz_atom,
        g_net_wm_state_hidden_atom, g_net_wm_name_atom, g_utf8_string_atom,
        g_net_wm_state_skip_taskbar_atom, g_net_wm_state_skip_pager_atom,
        g_net_wm_state_modal_atom, g_net_wm_icon_atom;

Atom g_net_wm_state_atom, g_net_wm_desktop_atom;

/* 
   Get window property value (32 bit format) 
   Returns zero on success, -1 on error
*/
static int
get_property_value(Window wnd, char *propname, long max_length,
                   unsigned long *nitems_return, unsigned char **prop_return, int nowarn)
{
        int result;
        Atom property;
        Atom actual_type_return;
        int actual_format_return;
        unsigned long bytes_after_return;

        property = XInternAtom(g_display, propname, True);
        if (property == None)
        {
                fprintf(stderr, "Atom %s does not exist\n", propname);
                return (-1);
        }

        result = XGetWindowProperty(g_display, wnd, property, 0,        /* long_offset */
                                    max_length, /* long_length */
                                    False,      /* delete */
                                    AnyPropertyType,    /* req_type */
                                    &actual_type_return,
                                    &actual_format_return,
                                    nitems_return, &bytes_after_return, prop_return);

        if (result != Success)
        {
                fprintf(stderr, "XGetWindowProperty failed\n");
                return (-1);
        }

        if (actual_type_return == None || actual_format_return == 0)
        {
                if (!nowarn)
                        fprintf(stderr, "Window is missing property %s\n", propname);
                return (-1);
        }

        if (bytes_after_return)
        {
                fprintf(stderr, "%s is too big for me\n", propname);
                return (-1);
        }

        if (actual_format_return != 32)
        {
                fprintf(stderr, "%s has bad format\n", propname);
                return (-1);
        }

        return (0);
}

/* 
   Get current desktop number
   Returns -1 on error
*/
static int
get_current_desktop(void)
{
        unsigned long nitems_return;
        unsigned char *prop_return;
        int current_desktop;

        if (get_property_value
            (DefaultRootWindow(g_display), "_NET_CURRENT_DESKTOP", 1, &nitems_return,
             &prop_return, 0) < 0)
                return (-1);

        if (nitems_return != 1)
        {
                fprintf(stderr, "_NET_CURRENT_DESKTOP has bad length\n");
                return (-1);
        }

        current_desktop = *prop_return;
        XFree(prop_return);
        return current_desktop;
}

/*
  Get workarea geometry
  Returns zero on success, -1 on error
 */

int
get_current_workarea(uint32 * x, uint32 * y, uint32 * width, uint32 * height)
{
        int current_desktop;
        unsigned long nitems_return;
        unsigned char *prop_return;
        uint32 *return_words;
        const uint32 net_workarea_x_offset = 0;
        const uint32 net_workarea_y_offset = 1;
        const uint32 net_workarea_width_offset = 2;
        const uint32 net_workarea_height_offset = 3;
        const uint32 max_prop_length = 32 * 4;  /* Max 32 desktops */

        if (get_property_value
            (DefaultRootWindow(g_display), "_NET_WORKAREA", max_prop_length, &nitems_return,
             &prop_return, 0) < 0)
                return (-1);

        if (nitems_return % 4)
        {
                fprintf(stderr, "_NET_WORKAREA has odd length\n");
                return (-1);
        }

        current_desktop = get_current_desktop();

        if (current_desktop < 0)
                return -1;

        return_words = (uint32 *) prop_return;

        *x = return_words[current_desktop * 4 + net_workarea_x_offset];
        *y = return_words[current_desktop * 4 + net_workarea_y_offset];
        *width = return_words[current_desktop * 4 + net_workarea_width_offset];
        *height = return_words[current_desktop * 4 + net_workarea_height_offset];

        XFree(prop_return);

        return (0);

}


void
ewmh_init()
{
        /* FIXME: Use XInternAtoms */
        g_net_wm_state_maximized_vert_atom =
                XInternAtom(g_display, "_NET_WM_STATE_MAXIMIZED_VERT", False);
        g_net_wm_state_maximized_horz_atom =
                XInternAtom(g_display, "_NET_WM_STATE_MAXIMIZED_HORZ", False);
        g_net_wm_state_hidden_atom = XInternAtom(g_display, "_NET_WM_STATE_HIDDEN", False);
        g_net_wm_state_skip_taskbar_atom =
                XInternAtom(g_display, "_NET_WM_STATE_SKIP_TASKBAR", False);
        g_net_wm_state_skip_pager_atom = XInternAtom(g_display, "_NET_WM_STATE_SKIP_PAGER", False);
        g_net_wm_state_modal_atom = XInternAtom(g_display, "_NET_WM_STATE_MODAL", False);
        g_net_wm_state_atom = XInternAtom(g_display, "_NET_WM_STATE", False);
        g_net_wm_desktop_atom = XInternAtom(g_display, "_NET_WM_DESKTOP", False);
        g_net_wm_name_atom = XInternAtom(g_display, "_NET_WM_NAME", False);
        g_net_wm_icon_atom = XInternAtom(g_display, "_NET_WM_ICON", False);
        g_utf8_string_atom = XInternAtom(g_display, "UTF8_STRING", False);
}


/* 
   Get the window state: normal/minimized/maximized. 
*/
#ifndef MAKE_PROTO
int
ewmh_get_window_state(Window w)
{
        unsigned long nitems_return;
        unsigned char *prop_return;
        uint32 *return_words;
        unsigned long item;
        RD_BOOL maximized_vert, maximized_horz, hidden;

        maximized_vert = maximized_horz = hidden = False;

        if (get_property_value(w, "_NET_WM_STATE", 64, &nitems_return, &prop_return, 0) < 0)
                return SEAMLESSRDP_NORMAL;

        return_words = (uint32 *) prop_return;

        for (item = 0; item < nitems_return; item++)
        {
                if (return_words[item] == g_net_wm_state_maximized_vert_atom)
                        maximized_vert = True;
                if (return_words[item] == g_net_wm_state_maximized_horz_atom)
                        maximized_horz = True;
                if (return_words[item] == g_net_wm_state_hidden_atom)
                        hidden = True;
        }

        XFree(prop_return);

        if (maximized_vert && maximized_horz)
                return SEAMLESSRDP_MAXIMIZED;
        else if (hidden)
                return SEAMLESSRDP_MINIMIZED;
        else
                return SEAMLESSRDP_NORMAL;
}

static int
ewmh_modify_state(Window wnd, int add, Atom atom1, Atom atom2)
{
        Status status;
        XEvent xevent;

        int result;
        unsigned long nitems;
        unsigned char *props;
        uint32 state = WithdrawnState;

        /* The spec states that the window manager must respect any
           _NET_WM_STATE attributes on a withdrawn window. In order words, we
           modify the attributes directly for withdrawn windows and ask the WM
           to do it for active windows. */
        result = get_property_value(wnd, "WM_STATE", 64, &nitems, &props, 1);
        if ((result >= 0) && nitems)
        {
                state = *(uint32 *) props;
                XFree(props);
        }

        if (state == WithdrawnState)
        {
                if (add)
                {
                        Atom atoms[2];

                        atoms[0] = atom1;
                        nitems = 1;
                        if (atom2)
                        {
                                atoms[1] = atom2;
                                nitems = 2;
                        }

                        XChangeProperty(g_display, wnd, g_net_wm_state_atom, XA_ATOM,
                                        32, PropModeAppend, (unsigned char *) atoms, nitems);
                }
                else
                {
                        Atom *atoms;
                        int i;

                        if (get_property_value(wnd, "_NET_WM_STATE", 64, &nitems, &props, 1) < 0)
                                return 0;

                        atoms = (Atom *) props;

                        for (i = 0; i < nitems; i++)
                        {
                                if ((atoms[i] == atom1) || (atom2 && (atoms[i] == atom2)))
                                {
                                        if (i != (nitems - 1))
                                                memmove(&atoms[i], &atoms[i + 1],
                                                        sizeof(Atom) * (nitems - i - 1));
                                        nitems--;
                                        i--;
                                }
                        }

                        XChangeProperty(g_display, wnd, g_net_wm_state_atom, XA_ATOM,
                                        32, PropModeReplace, (unsigned char *) atoms, nitems);

                        XFree(props);
                }

                return 0;
        }

        xevent.type = ClientMessage;
        xevent.xclient.window = wnd;
        xevent.xclient.message_type = g_net_wm_state_atom;
        xevent.xclient.format = 32;
        if (add)
                xevent.xclient.data.l[0] = _NET_WM_STATE_ADD;
        else
                xevent.xclient.data.l[0] = _NET_WM_STATE_REMOVE;
        xevent.xclient.data.l[1] = atom1;
        xevent.xclient.data.l[2] = atom2;
        xevent.xclient.data.l[3] = 0;
        xevent.xclient.data.l[4] = 0;
        status = XSendEvent(g_display, DefaultRootWindow(g_display), False,
                            SubstructureNotifyMask | SubstructureRedirectMask, &xevent);
        if (!status)
                return -1;

        return 0;
}

/* 
   Set the window state: normal/minimized/maximized. 
   Returns -1 on failure. 
*/
int
ewmh_change_state(Window wnd, int state)
{
        /*
         * Deal with the max atoms
         */
        if (state == SEAMLESSRDP_MAXIMIZED)
        {
                if (ewmh_modify_state
                    (wnd, 1, g_net_wm_state_maximized_vert_atom,
                     g_net_wm_state_maximized_horz_atom) < 0)
                        return -1;
        }
        else
        {
                if (ewmh_modify_state
                    (wnd, 0, g_net_wm_state_maximized_vert_atom,
                     g_net_wm_state_maximized_horz_atom) < 0)
                        return -1;
        }

        return 0;
}


int
ewmh_get_window_desktop(Window wnd)
{
        unsigned long nitems_return;
        unsigned char *prop_return;
        int desktop;

        if (get_property_value(wnd, "_NET_WM_DESKTOP", 1, &nitems_return, &prop_return, 0) < 0)
                return (-1);

        if (nitems_return != 1)
        {
                fprintf(stderr, "_NET_WM_DESKTOP has bad length\n");
                return (-1);
        }

        desktop = *prop_return;
        XFree(prop_return);
        return desktop;
}


int
ewmh_move_to_desktop(Window wnd, unsigned int desktop)
{
        Status status;
        XEvent xevent;

        xevent.type = ClientMessage;
        xevent.xclient.window = wnd;
        xevent.xclient.message_type = g_net_wm_desktop_atom;
        xevent.xclient.format = 32;
        xevent.xclient.data.l[0] = desktop;
        xevent.xclient.data.l[1] = 0;
        xevent.xclient.data.l[2] = 0;
        xevent.xclient.data.l[3] = 0;
        xevent.xclient.data.l[4] = 0;
        status = XSendEvent(g_display, DefaultRootWindow(g_display), False,
                            SubstructureNotifyMask | SubstructureRedirectMask, &xevent);
        if (!status)
                return -1;

        return 0;
}

void
ewmh_set_wm_name(Window wnd, const char *title)
{
        int len;

        len = strlen(title);
        XChangeProperty(g_display, wnd, g_net_wm_name_atom, g_utf8_string_atom,
                        8, PropModeReplace, (unsigned char *) title, len);
}


int
ewmh_set_window_popup(Window wnd)
{
        if (ewmh_modify_state
            (wnd, 1, g_net_wm_state_skip_taskbar_atom, g_net_wm_state_skip_pager_atom) < 0)
                return -1;
        return 0;
}

int
ewmh_set_window_modal(Window wnd)
{
        if (ewmh_modify_state(wnd, 1, g_net_wm_state_modal_atom, 0) < 0)
                return -1;
        return 0;
}

void
ewmh_set_icon(Window wnd, int width, int height, const char *rgba_data)
{
        unsigned long nitems, i;
        unsigned char *props;
        uint32 *cur_set, *new_set;
        uint32 *icon;

        cur_set = NULL;
        new_set = NULL;

        if (get_property_value(wnd, "_NET_WM_ICON", 10000, &nitems, &props, 1) >= 0)
        {
                cur_set = (uint32 *) props;

                for (i = 0; i < nitems;)
                {
                        if (cur_set[i] == width && cur_set[i + 1] == height)
                                break;

                        i += 2 + cur_set[i] * cur_set[i + 1];
                }

                if (i != nitems)
                        icon = cur_set + i;
                else
                {
                        new_set = xmalloc((nitems + width * height + 2) * 4);
                        memcpy(new_set, cur_set, nitems * 4);
                        icon = new_set + nitems;
                        nitems += width * height + 2;
                }
        }
        else
        {
                new_set = xmalloc((width * height + 2) * 4);
                icon = new_set;
                nitems = width * height + 2;
        }

        icon[0] = width;
        icon[1] = height;

        /* Convert RGBA -> ARGB */
        for (i = 0; i < width * height; i++)
        {
                icon[i + 2] =
                        rgba_data[i * 4 + 3] << 24 |
                        ((rgba_data[i * 4 + 0] << 16) & 0x00FF0000) |
                        ((rgba_data[i * 4 + 1] << 8) & 0x0000FF00) |
                        ((rgba_data[i * 4 + 2] << 0) & 0x000000FF);
        }

        XChangeProperty(g_display, wnd, g_net_wm_icon_atom, XA_CARDINAL, 32,
                        PropModeReplace, (unsigned char *) (new_set ? new_set : cur_set), nitems);

        if (cur_set)
                XFree(cur_set);
        if (new_set)
                xfree(new_set);
}

void
ewmh_del_icon(Window wnd, int width, int height)
{
        unsigned long nitems, i, icon_size;
        unsigned char *props;
        uint32 *cur_set, *new_set;

        cur_set = NULL;
        new_set = NULL;

        if (get_property_value(wnd, "_NET_WM_ICON", 10000, &nitems, &props, 1) < 0)
                return;

        cur_set = (uint32 *) props;

        for (i = 0; i < nitems;)
        {
                if (cur_set[i] == width && cur_set[i + 1] == height)
                        break;

                i += 2 + cur_set[i] * cur_set[i + 1];
        }

        if (i == nitems)
                goto out;

        icon_size = width * height + 2;
        new_set = xmalloc((nitems - icon_size) * 4);

        if (i != 0)
                memcpy(new_set, cur_set, i * 4);
        if (i != nitems - icon_size)
                memcpy(new_set + i * 4, cur_set + i * 4 + icon_size, nitems - icon_size);

        nitems -= icon_size;

        XChangeProperty(g_display, wnd, g_net_wm_icon_atom, XA_CARDINAL, 32,
                        PropModeReplace, (unsigned char *) new_set, nitems);

        xfree(new_set);

      out:
        XFree(cur_set);
}

#endif /* MAKE_PROTO */


#if 0

/* FIXME: _NET_MOVERESIZE_WINDOW is for pagers, not for
   applications. We should implement _NET_WM_MOVERESIZE instead */

int
ewmh_net_moveresize_window(Window wnd, int x, int y, int width, int height)
{
        Status status;
        XEvent xevent;
        Atom moveresize;

        moveresize = XInternAtom(g_display, "_NET_MOVERESIZE_WINDOW", False);
        if (!moveresize)
        {
                return -1;
        }

        xevent.type = ClientMessage;
        xevent.xclient.window = wnd;
        xevent.xclient.message_type = moveresize;
        xevent.xclient.format = 32;
        xevent.xclient.data.l[0] = StaticGravity | (1 << 8) | (1 << 9) | (1 << 10) | (1 << 11);
        xevent.xclient.data.l[1] = x;
        xevent.xclient.data.l[2] = y;
        xevent.xclient.data.l[3] = width;
        xevent.xclient.data.l[4] = height;

        status = XSendEvent(g_display, DefaultRootWindow(g_display), False,
                            SubstructureNotifyMask | SubstructureRedirectMask, &xevent);
        if (!status)
                return -1;
        return 0;
}

#endif
1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3
4	Support functions for Extended Window Manager Hints,
5	http://www.freedesktop.org/wiki/Standards_2fwm_2dspec
6
7	Copyright 2005 Peter Astrand <astrand@cendio.se> for Cendio AB
8	Copyright 2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
9
10	This program is free software; you can redistribute it and/or modify
11	it under the terms of the GNU General Public License as published by
12	the Free Software Foundation; either version 2 of the License, or
13	(at your option) any later version.
14
15	This program is distributed in the hope that it will be useful,
16	but WITHOUT ANY WARRANTY; without even the implied warranty of
17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18	GNU General Public License for more details.
19
20	You should have received a copy of the GNU General Public License
21	along with this program; if not, write to the Free Software
22	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23	*/
24
25	#include <X11/Xlib.h>
26	#include <X11/Xatom.h>
27	#include <X11/Xutil.h>
28	#include "rdesktop.h"
29
30	#define _NET_WM_STATE_REMOVE 0 /* remove/unset property */
31	#define _NET_WM_STATE_ADD 1 /* add/set property */
32	#define _NET_WM_STATE_TOGGLE 2 /* toggle property */
33
34	extern Display *g_display;
35
36	static Atom g_net_wm_state_maximized_vert_atom, g_net_wm_state_maximized_horz_atom,
37	g_net_wm_state_hidden_atom, g_net_wm_name_atom, g_utf8_string_atom,
38	g_net_wm_state_skip_taskbar_atom, g_net_wm_state_skip_pager_atom,
39	g_net_wm_state_modal_atom, g_net_wm_icon_atom;
40
41	Atom g_net_wm_state_atom, g_net_wm_desktop_atom;
42
43	/*
44	Get window property value (32 bit format)
45	Returns zero on success, -1 on error
46	*/
47	static int
48	get_property_value(Window wnd, char *propname, long max_length,
49	unsigned long nitems_return, unsigned char *prop_return, int nowarn)
50	{
51	int result;
52	Atom property;
53	Atom actual_type_return;
54	int actual_format_return;
55	unsigned long bytes_after_return;
56
57	property = XInternAtom(g_display, propname, True);
58	if (property == None)
59	{
60	fprintf(stderr, "Atom %s does not exist\n", propname);
61	return (-1);
62	}
63
64	result = XGetWindowProperty(g_display, wnd, property, 0, /* long_offset */
65	max_length, /* long_length */
66	False, /* delete */
67	AnyPropertyType, /* req_type */
68	&actual_type_return,
69	&actual_format_return,
70	nitems_return, &bytes_after_return, prop_return);
71
72	if (result != Success)
73	{
74	fprintf(stderr, "XGetWindowProperty failed\n");
75	return (-1);
76	}
77
78	if (actual_type_return == None \|\| actual_format_return == 0)
79	{
80	if (!nowarn)
81	fprintf(stderr, "Window is missing property %s\n", propname);
82	return (-1);
83	}
84
85	if (bytes_after_return)
86	{
87	fprintf(stderr, "%s is too big for me\n", propname);
88	return (-1);
89	}
90
91	if (actual_format_return != 32)
92	{
93	fprintf(stderr, "%s has bad format\n", propname);
94	return (-1);
95	}
96
97	return (0);
98	}
99
100	/*
101	Get current desktop number
102	Returns -1 on error
103	*/
104	static int
105	get_current_desktop(void)
106	{
107	unsigned long nitems_return;
108	unsigned char *prop_return;
109	int current_desktop;
110
111	if (get_property_value
112	(DefaultRootWindow(g_display), "_NET_CURRENT_DESKTOP", 1, &nitems_return,
113	&prop_return, 0) < 0)
114	return (-1);
115
116	if (nitems_return != 1)
117	{
118	fprintf(stderr, "_NET_CURRENT_DESKTOP has bad length\n");
119	return (-1);
120	}
121
122	current_desktop = *prop_return;
123	XFree(prop_return);
124	return current_desktop;
125	}
126
127	/*
128	Get workarea geometry
129	Returns zero on success, -1 on error
130	*/
131
132	int
133	get_current_workarea(uint32 * x, uint32 * y, uint32 * width, uint32 * height)
134	{
135	int current_desktop;
136	unsigned long nitems_return;
137	unsigned char *prop_return;
138	uint32 *return_words;
139	const uint32 net_workarea_x_offset = 0;
140	const uint32 net_workarea_y_offset = 1;
141	const uint32 net_workarea_width_offset = 2;
142	const uint32 net_workarea_height_offset = 3;
143	const uint32 max_prop_length = 32 * 4; /* Max 32 desktops */
144
145	if (get_property_value
146	(DefaultRootWindow(g_display), "_NET_WORKAREA", max_prop_length, &nitems_return,
147	&prop_return, 0) < 0)
148	return (-1);
149
150	if (nitems_return % 4)
151	{
152	fprintf(stderr, "_NET_WORKAREA has odd length\n");
153	return (-1);
154	}
155
156	current_desktop = get_current_desktop();
157
158	if (current_desktop < 0)
159	return -1;
160
161	return_words = (uint32 *) prop_return;
162
163	x = return_words[current_desktop 4 + net_workarea_x_offset];
164	y = return_words[current_desktop 4 + net_workarea_y_offset];
165	width = return_words[current_desktop 4 + net_workarea_width_offset];
166	height = return_words[current_desktop 4 + net_workarea_height_offset];
167
168	XFree(prop_return);
169
170	return (0);
171
172	}
173
174
175
176	void
177	ewmh_init()
178	{
179	/* FIXME: Use XInternAtoms */
180	g_net_wm_state_maximized_vert_atom =
181	XInternAtom(g_display, "_NET_WM_STATE_MAXIMIZED_VERT", False);
182	g_net_wm_state_maximized_horz_atom =
183	XInternAtom(g_display, "_NET_WM_STATE_MAXIMIZED_HORZ", False);
184	g_net_wm_state_hidden_atom = XInternAtom(g_display, "_NET_WM_STATE_HIDDEN", False);
185	g_net_wm_state_skip_taskbar_atom =
186	XInternAtom(g_display, "_NET_WM_STATE_SKIP_TASKBAR", False);
187	g_net_wm_state_skip_pager_atom = XInternAtom(g_display, "_NET_WM_STATE_SKIP_PAGER", False);
188	g_net_wm_state_modal_atom = XInternAtom(g_display, "_NET_WM_STATE_MODAL", False);
189	g_net_wm_state_atom = XInternAtom(g_display, "_NET_WM_STATE", False);
190	g_net_wm_desktop_atom = XInternAtom(g_display, "_NET_WM_DESKTOP", False);
191	g_net_wm_name_atom = XInternAtom(g_display, "_NET_WM_NAME", False);
192	g_net_wm_icon_atom = XInternAtom(g_display, "_NET_WM_ICON", False);
193	g_utf8_string_atom = XInternAtom(g_display, "UTF8_STRING", False);
194	}
195
196
197	/*
198	Get the window state: normal/minimized/maximized.
199	*/
200	#ifndef MAKE_PROTO
201	int
202	ewmh_get_window_state(Window w)
203	{
204	unsigned long nitems_return;
205	unsigned char *prop_return;
206	uint32 *return_words;
207	unsigned long item;
208	RD_BOOL maximized_vert, maximized_horz, hidden;
209
210	maximized_vert = maximized_horz = hidden = False;
211
212	if (get_property_value(w, "_NET_WM_STATE", 64, &nitems_return, &prop_return, 0) < 0)
213	return SEAMLESSRDP_NORMAL;
214
215	return_words = (uint32 *) prop_return;
216
217	for (item = 0; item < nitems_return; item++)
218	{
219	if (return_words[item] == g_net_wm_state_maximized_vert_atom)
220	maximized_vert = True;
221	if (return_words[item] == g_net_wm_state_maximized_horz_atom)
222	maximized_horz = True;
223	if (return_words[item] == g_net_wm_state_hidden_atom)
224	hidden = True;
225	}
226
227	XFree(prop_return);
228
229	if (maximized_vert && maximized_horz)
230	return SEAMLESSRDP_MAXIMIZED;
231	else if (hidden)
232	return SEAMLESSRDP_MINIMIZED;
233	else
234	return SEAMLESSRDP_NORMAL;
235	}
236
237	static int
238	ewmh_modify_state(Window wnd, int add, Atom atom1, Atom atom2)
239	{
240	Status status;
241	XEvent xevent;
242
243	int result;
244	unsigned long nitems;
245	unsigned char *props;
246	uint32 state = WithdrawnState;
247
248	/* The spec states that the window manager must respect any
249	_NET_WM_STATE attributes on a withdrawn window. In order words, we
250	modify the attributes directly for withdrawn windows and ask the WM
251	to do it for active windows. */
252	result = get_property_value(wnd, "WM_STATE", 64, &nitems, &props, 1);
253	if ((result >= 0) && nitems)
254	{
255	state = (uint32 ) props;
256	XFree(props);
257	}
258
259	if (state == WithdrawnState)
260	{
261	if (add)
262	{
263	Atom atoms[2];
264
265	atoms[0] = atom1;
266	nitems = 1;
267	if (atom2)
268	{
269	atoms[1] = atom2;
270	nitems = 2;
271	}
272
273	XChangeProperty(g_display, wnd, g_net_wm_state_atom, XA_ATOM,
274	32, PropModeAppend, (unsigned char *) atoms, nitems);
275	}
276	else
277	{
278	Atom *atoms;
279	int i;
280
281	if (get_property_value(wnd, "_NET_WM_STATE", 64, &nitems, &props, 1) < 0)
282	return 0;
283
284	atoms = (Atom *) props;
285
286	for (i = 0; i < nitems; i++)
287	{
288	if ((atoms[i] == atom1) \|\| (atom2 && (atoms[i] == atom2)))
289	{
290	if (i != (nitems - 1))
291	memmove(&atoms[i], &atoms[i + 1],
292	sizeof(Atom) * (nitems - i - 1));
293	nitems--;
294	i--;
295	}
296	}
297
298	XChangeProperty(g_display, wnd, g_net_wm_state_atom, XA_ATOM,
299	32, PropModeReplace, (unsigned char *) atoms, nitems);
300
301	XFree(props);
302	}
303
304	return 0;
305	}
306
307	xevent.type = ClientMessage;
308	xevent.xclient.window = wnd;
309	xevent.xclient.message_type = g_net_wm_state_atom;
310	xevent.xclient.format = 32;
311	if (add)
312	xevent.xclient.data.l[0] = _NET_WM_STATE_ADD;
313	else
314	xevent.xclient.data.l[0] = _NET_WM_STATE_REMOVE;
315	xevent.xclient.data.l[1] = atom1;
316	xevent.xclient.data.l[2] = atom2;
317	xevent.xclient.data.l[3] = 0;
318	xevent.xclient.data.l[4] = 0;
319	status = XSendEvent(g_display, DefaultRootWindow(g_display), False,
320	SubstructureNotifyMask \| SubstructureRedirectMask, &xevent);
321	if (!status)
322	return -1;
323
324	return 0;
325	}
326
327	/*
328	Set the window state: normal/minimized/maximized.
329	Returns -1 on failure.
330	*/
331	int
332	ewmh_change_state(Window wnd, int state)
333	{
334	/*
335	* Deal with the max atoms
336	*/
337	if (state == SEAMLESSRDP_MAXIMIZED)
338	{
339	if (ewmh_modify_state
340	(wnd, 1, g_net_wm_state_maximized_vert_atom,
341	g_net_wm_state_maximized_horz_atom) < 0)
342	return -1;
343	}
344	else
345	{
346	if (ewmh_modify_state
347	(wnd, 0, g_net_wm_state_maximized_vert_atom,
348	g_net_wm_state_maximized_horz_atom) < 0)
349	return -1;
350	}
351
352	return 0;
353	}
354
355
356	int
357	ewmh_get_window_desktop(Window wnd)
358	{
359	unsigned long nitems_return;
360	unsigned char *prop_return;
361	int desktop;
362
363	if (get_property_value(wnd, "_NET_WM_DESKTOP", 1, &nitems_return, &prop_return, 0) < 0)
364	return (-1);
365
366	if (nitems_return != 1)
367	{
368	fprintf(stderr, "_NET_WM_DESKTOP has bad length\n");
369	return (-1);
370	}
371
372	desktop = *prop_return;
373	XFree(prop_return);
374	return desktop;
375	}
376
377
378	int
379	ewmh_move_to_desktop(Window wnd, unsigned int desktop)
380	{
381	Status status;
382	XEvent xevent;
383
384	xevent.type = ClientMessage;
385	xevent.xclient.window = wnd;
386	xevent.xclient.message_type = g_net_wm_desktop_atom;
387	xevent.xclient.format = 32;
388	xevent.xclient.data.l[0] = desktop;
389	xevent.xclient.data.l[1] = 0;
390	xevent.xclient.data.l[2] = 0;
391	xevent.xclient.data.l[3] = 0;
392	xevent.xclient.data.l[4] = 0;
393	status = XSendEvent(g_display, DefaultRootWindow(g_display), False,
394	SubstructureNotifyMask \| SubstructureRedirectMask, &xevent);
395	if (!status)
396	return -1;
397
398	return 0;
399	}
400
401	void
402	ewmh_set_wm_name(Window wnd, const char *title)
403	{
404	int len;
405
406	len = strlen(title);
407	XChangeProperty(g_display, wnd, g_net_wm_name_atom, g_utf8_string_atom,
408	8, PropModeReplace, (unsigned char *) title, len);
409	}
410
411
412	int
413	ewmh_set_window_popup(Window wnd)
414	{
415	if (ewmh_modify_state
416	(wnd, 1, g_net_wm_state_skip_taskbar_atom, g_net_wm_state_skip_pager_atom) < 0)
417	return -1;
418	return 0;
419	}
420
421	int
422	ewmh_set_window_modal(Window wnd)
423	{
424	if (ewmh_modify_state(wnd, 1, g_net_wm_state_modal_atom, 0) < 0)
425	return -1;
426	return 0;
427	}
428
429	void
430	ewmh_set_icon(Window wnd, int width, int height, const char *rgba_data)
431	{
432	unsigned long nitems, i;
433	unsigned char *props;
434	uint32 cur_set, new_set;
435	uint32 *icon;
436
437	cur_set = NULL;
438	new_set = NULL;
439
440	if (get_property_value(wnd, "_NET_WM_ICON", 10000, &nitems, &props, 1) >= 0)
441	{
442	cur_set = (uint32 *) props;
443
444	for (i = 0; i < nitems;)
445	{
446	if (cur_set[i] == width && cur_set[i + 1] == height)
447	break;
448
449	i += 2 + cur_set[i] * cur_set[i + 1];
450	}
451
452	if (i != nitems)
453	icon = cur_set + i;
454	else
455	{
456	new_set = xmalloc((nitems + width * height + 2) * 4);
457	memcpy(new_set, cur_set, nitems * 4);
458	icon = new_set + nitems;
459	nitems += width * height + 2;
460	}
461	}
462	else
463	{
464	new_set = xmalloc((width * height + 2) * 4);
465	icon = new_set;
466	nitems = width * height + 2;
467	}
468
469	icon[0] = width;
470	icon[1] = height;
471
472	/* Convert RGBA -> ARGB */
473	for (i = 0; i < width * height; i++)
474	{
475	icon[i + 2] =
476	rgba_data[i * 4 + 3] << 24 \|
477	((rgba_data[i * 4 + 0] << 16) & 0x00FF0000) \|
478	((rgba_data[i * 4 + 1] << 8) & 0x0000FF00) \|
479	((rgba_data[i * 4 + 2] << 0) & 0x000000FF);
480	}
481
482	XChangeProperty(g_display, wnd, g_net_wm_icon_atom, XA_CARDINAL, 32,
483	PropModeReplace, (unsigned char *) (new_set ? new_set : cur_set), nitems);
484
485	if (cur_set)
486	XFree(cur_set);
487	if (new_set)
488	xfree(new_set);
489	}
490
491	void
492	ewmh_del_icon(Window wnd, int width, int height)
493	{
494	unsigned long nitems, i, icon_size;
495	unsigned char *props;
496	uint32 cur_set, new_set;
497
498	cur_set = NULL;
499	new_set = NULL;
500
501	if (get_property_value(wnd, "_NET_WM_ICON", 10000, &nitems, &props, 1) < 0)
502	return;
503
504	cur_set = (uint32 *) props;
505
506	for (i = 0; i < nitems;)
507	{
508	if (cur_set[i] == width && cur_set[i + 1] == height)
509	break;
510
511	i += 2 + cur_set[i] * cur_set[i + 1];
512	}
513
514	if (i == nitems)
515	goto out;
516
517	icon_size = width * height + 2;
518	new_set = xmalloc((nitems - icon_size) * 4);
519
520	if (i != 0)
521	memcpy(new_set, cur_set, i * 4);
522	if (i != nitems - icon_size)
523	memcpy(new_set + i * 4, cur_set + i * 4 + icon_size, nitems - icon_size);
524
525	nitems -= icon_size;
526
527	XChangeProperty(g_display, wnd, g_net_wm_icon_atom, XA_CARDINAL, 32,
528	PropModeReplace, (unsigned char *) new_set, nitems);
529
530	xfree(new_set);
531
532	out:
533	XFree(cur_set);
534	}
535
536	#endif /* MAKE_PROTO */
537
538
539	#if 0
540
541	/* FIXME: _NET_MOVERESIZE_WINDOW is for pagers, not for
542	applications. We should implement _NET_WM_MOVERESIZE instead */
543
544	int
545	ewmh_net_moveresize_window(Window wnd, int x, int y, int width, int height)
546	{
547	Status status;
548	XEvent xevent;
549	Atom moveresize;
550
551	moveresize = XInternAtom(g_display, "_NET_MOVERESIZE_WINDOW", False);
552	if (!moveresize)
553	{
554	return -1;
555	}
556
557	xevent.type = ClientMessage;
558	xevent.xclient.window = wnd;
559	xevent.xclient.message_type = moveresize;
560	xevent.xclient.format = 32;
561	xevent.xclient.data.l[0] = StaticGravity \| (1 << 8) \| (1 << 9) \| (1 << 10) \| (1 << 11);
562	xevent.xclient.data.l[1] = x;
563	xevent.xclient.data.l[2] = y;
564	xevent.xclient.data.l[3] = width;
565	xevent.xclient.data.l[4] = height;
566
567	status = XSendEvent(g_display, DefaultRootWindow(g_display), False,
568	SubstructureNotifyMask \| SubstructureRedirectMask, &xevent);
569	if (!status)
570	return -1;
571	return 0;
572	}
573
574	#endif