1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* \/\/\
*
* Copyright (C) 2012-2018 Vito Caputo - <vcaputo@pengaru.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 as published
* by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/* virtual desktops */
#include <assert.h>
#include <X11/Xlib.h>
#include <stdlib.h>
#include <string.h>
#include "list.h"
#include "context.h"
#include "desktop.h"
#include "vwm.h"
#include "xwindow.h"
/* make the specified desktop the most recently used one */
vwm_desktop_t * vwm_desktop_mru(vwm_t *vwm, vwm_desktop_t *desktop)
{
VWM_TRACE("MRU desktop: %p", desktop);
list_move(&desktop->desktops_mru, &vwm->desktops_mru);
vwm_context_mru(vwm, desktop->context);
return desktop;
}
/* focus a virtual desktop */
/* this updates the focused context if necessary, maps and unmaps windows accordingly if necessary */
int vwm_desktop_focus(vwm_t *vwm, vwm_desktop_t *desktop)
{
XGrabServer(VWM_XDISPLAY(vwm));
XSync(VWM_XDISPLAY(vwm), False);
if (vwm->focused_desktop != desktop) {
vwm_xwindow_t *xwin;
vwm_window_t *vwin;
/* unmap the windows on the currently focused desktop, map those on the newly focused one */
list_for_each_entry(xwin, &vwm->xwindows, xwindows) {
vwin = xwin->managed;
if (!vwin)
continue;
if (vwin->desktop == vwm->focused_desktop)
vwm_win_unmap(vwm, vwin);
}
XFlush(VWM_XDISPLAY(vwm));
list_for_each_entry_prev(xwin, &vwm->xwindows, xwindows) {
vwin = xwin->managed;
if (!vwin)
continue;
if (vwin->desktop == desktop)
vwm_win_map(vwm, vwin);
}
vwm->focused_desktop = desktop;
desktop->context->focused_desktop = desktop;
}
/* directly focus the desktop's focused window if there is one, we don't use vwm_win_focus() intentionally XXX */
if (vwm->focused_desktop->focused_window) {
VWM_TRACE("Focusing \"%s\"", vwm->focused_desktop->focused_window->xwindow->name);
XSetInputFocus(VWM_XDISPLAY(vwm), vwm->focused_desktop->focused_window->xwindow->id, RevertToPointerRoot, CurrentTime);
}
XUngrabServer(VWM_XDISPLAY(vwm));
return 1;
}
/* return next MRU desktop within the same context relative to the supplied desktop, wraps-around */
vwm_desktop_t * vwm_desktop_next_mru(vwm_t *vwm, vwm_desktop_t *desktop, vwm_direction_t direction)
{
vwm_desktop_t *next = desktop;
do {
/* this dance is necessary because the list head @ vwm->desktops_mru has no vwm_desktop_t container,
* and we're exploiting the circular nature of the doubly linked lists, so we need to take care to skip
* past the container-less head.
*/
switch (direction) {
case VWM_DIRECTION_FORWARD:
if (next->desktops_mru.next == &vwm->desktops_mru) {
next = list_entry(next->desktops_mru.next->next, vwm_desktop_t, desktops_mru);
} else {
next = list_entry(next->desktops_mru.next, vwm_desktop_t, desktops_mru);
}
break;
case VWM_DIRECTION_REVERSE:
if (next->desktops_mru.prev == &vwm->desktops_mru) {
next = list_entry(next->desktops_mru.prev->prev, vwm_desktop_t, desktops_mru);
} else {
next = list_entry(next->desktops_mru.prev, vwm_desktop_t, desktops_mru);
}
break;
default:
assert(0);
}
} while (next->context != desktop->context);
return next;
}
/* return next in-context desktop spatially relative to the supplied desktop, no wrap-around */
vwm_desktop_t * vwm_desktop_next(vwm_t *vwm, vwm_desktop_t *desktop, vwm_direction_t direction)
{
switch (direction) {
case VWM_DIRECTION_FORWARD: {
vwm_desktop_t *next = desktop;
while (next->desktops.next != &vwm->desktops) {
next = list_entry(next->desktops.next, vwm_desktop_t, desktops);
if (next->context == desktop->context)
return next;
}
break;
}
case VWM_DIRECTION_REVERSE: {
vwm_desktop_t *next = desktop;
while (next->desktops.prev != &vwm->desktops) {
next = list_entry(next->desktops.prev, vwm_desktop_t, desktops);
if (next->context == desktop->context)
return next;
}
break;
}
default:
assert(0);
}
return desktop;
}
/* TODO: when "sending" windows to contexts, I currently always create a
* new desktop with this function. There should really be a "create if needed"
* variant which just returns an empty desktop in the target context, creating
* only if no empty one already exists, for "sending" purposes. The current
* approach tends to litter empty desktops unnecessarily.
*/
/* create a virtual desktop on the supplied context,
* if context is NULL a new one is created
* the desktop becomes the context's focused desktop if there isn't already one
*/
vwm_desktop_t * vwm_desktop_create(vwm_t *vwm, vwm_context_t *context)
{
vwm_desktop_t *desktop;
desktop = calloc(1, sizeof(vwm_desktop_t));
if (desktop == NULL) {
VWM_PERROR("Failed to allocate desktop");
return NULL;
}
if (!context)
context = vwm_context_create(vwm, -1, desktop);
if (!context->focused_desktop)
context->focused_desktop = desktop;
desktop->context = context;
list_add_tail(&desktop->desktops, &vwm->desktops);
list_add_tail(&desktop->desktops_mru, &vwm->desktops_mru);
return desktop;
}
/* destroy a virtual desktop */
void vwm_desktop_destroy(vwm_t *vwm, vwm_desktop_t *desktop)
{
/* silently refuse to destroy a desktop having windows (for now) */
/* there's _always_ a focused window on a desktop having mapped windows */
/* also silently refuse to destroy the last desktop (for now) */
if (desktop->focused_window || (desktop->desktops.next == desktop->desktops.prev))
return;
/* focus the desktop context's MRU desktop that isn't this one,
* if desktop is the context's focused desktop */
if (desktop == desktop->context->focused_desktop) {
vwm_desktop_t *next_desktop;
list_for_each_entry(next_desktop, &vwm->desktops_mru, desktops_mru) {
if (next_desktop != desktop && next_desktop->context == desktop->context) {
desktop->context->focused_desktop = next_desktop;
break;
}
}
/* if *still* the context's focused desktop, the context is finished.
* find a desktop from the next MRU context to focus if this desktop
* was the vwm focused one before destroying the context
*/
if (desktop == desktop->context->focused_desktop) {
if (desktop == vwm->focused_desktop)
next_desktop = vwm_context_next_mru(vwm, desktop->context, VWM_DIRECTION_FORWARD)->focused_desktop;
vwm_context_destroy(vwm, desktop->context);
}
if (desktop == vwm->focused_desktop)
vwm_desktop_focus(vwm, next_desktop);
}
list_del(&desktop->desktops);
list_del(&desktop->desktops_mru);
}
|
