1 // -*- mode: C++; indent-tabs-mode: nil; -*-
2 // screen.cc for Epistophy - a key handler for NETWM/EWMH window managers.
3 // Copyright (c) 2002 - 2002 Ben Jansens <ben at orodu.net>
5 // Permission is hereby granted, free of charge, to any person obtaining a
6 // copy of this software and associated documentation files (the "Software"),
7 // to deal in the Software without restriction, including without limitation
8 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 // and/or sell copies of the Software, and to permit persons to whom the
10 // Software is furnished to do so, subject to the following conditions:
12 // The above copyright notice and this permission notice shall be included in
13 // all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 // DEALINGS IN THE SOFTWARE.
24 # include "../../config.h"
25 #endif // HAVE_CONFIG_H
29 # include <sys/types.h>
31 #endif // HAVE_UNISTD_H
43 #include "../../src/XAtom.hh"
48 screen::screen(epist
*epist
, int number
) {
50 _xatom
= _epist
->xatom();
52 _active
= _clients
.end();
53 _root
= RootWindow(_epist
->getXDisplay(), _number
);
55 // find a window manager supporting NETWM, waiting for it to load if we must
56 int count
= 20; // try for 20 seconds
58 while (! (_epist
->doShutdown() || _managed
|| count
<= 0)) {
59 if (! (_managed
= findSupportingWM()))
64 cout
<< "Found compatible window manager '" << _wm_name
<< "' for screen "
67 cout
<< "Unable to find a compatible window manager for screen " <<
72 XSelectInput(_epist
->getXDisplay(), _root
, PropertyChangeMask
);
75 updateActiveDesktop();
83 XSelectInput(_epist
->getXDisplay(), _root
, None
);
87 bool screen::findSupportingWM() {
89 if (! _xatom
->getValue(_root
, XAtom::net_supporting_wm_check
, XAtom::window
,
90 support_win
) || support_win
== None
)
94 _xatom
->getValue(support_win
, XAtom::net_wm_name
, XAtom::utf8
, title
);
100 XWindow
*screen::findWindow(const XEvent
&e
) const {
103 WindowList::const_iterator it
, end
= _clients
.end();
104 for (it
= _clients
.begin(); it
!= end
; ++it
)
105 if (**it
== e
.xany
.window
)
113 void screen::processEvent(const XEvent
&e
) {
115 assert(e
.xany
.window
== _root
);
118 if (e
.xany
.window
!= _root
) {
119 window
= findWindow(e
); // find the window
120 assert(window
); // we caught an event for a window we don't know about!?
126 if (e
.xproperty
.atom
== _xatom
->getAtom(XAtom::net_number_of_desktops
))
128 if (e
.xproperty
.atom
== _xatom
->getAtom(XAtom::net_current_desktop
))
129 updateActiveDesktop();
130 if (e
.xproperty
.atom
== _xatom
->getAtom(XAtom::net_active_window
))
131 updateActiveWindow();
132 if (e
.xproperty
.atom
== _xatom
->getAtom(XAtom::net_client_list
)) {
133 // catch any window unmaps first
135 if (XCheckTypedWindowEvent(_epist
->getXDisplay(), e
.xany
.window
,
136 DestroyNotify
, &ev
) ||
137 XCheckTypedWindowEvent(_epist
->getXDisplay(), e
.xany
.window
,
151 void screen::handleKeypress(const XEvent
&e
) {
152 ActionList::const_iterator it
= _epist
->actions().begin();
153 ActionList::const_iterator end
= _epist
->actions().end();
154 for (; it
!= end
; ++it
) {
155 if (e
.xkey
.keycode
== it
->keycode() &&
156 e
.xkey
.state
== it
->modifierMask()) {
157 switch (it
->type()) {
158 case Action::nextWorkspace
:
159 cycleWorkspace(true);
162 case Action::prevWorkspace
:
163 cycleWorkspace(false);
166 case Action::nextWindow
:
167 cycleWindow(true, false);
170 case Action::prevWindow
:
171 cycleWindow(false, false);
174 case Action::nextWindowOnAllWorkspaces
:
175 cycleWindow(true, true);
178 case Action::prevWindowOnAllWorkspaces
:
179 cycleWindow(false, true);
182 case Action::changeWorkspace
:
183 changeWorkspace(it
->number());
187 // these actions require an active window
188 if (_active
!= _clients
.end()) {
189 XWindow
*window
= *_active
;
191 switch (it
->type()) {
192 case Action::iconify
:
208 case Action::toggleshade
:
209 window
->shade(! window
->shaded());
217 // do we want to add this window to our list?
218 bool screen::doAddWindow(Window window
) const {
222 if (! _xatom
->getValue(window
, XAtom::net_wm_window_type
, XAtom::atom
,
226 if (type
== _xatom
->getAtom(XAtom::net_wm_window_type_dock
) ||
227 type
== _xatom
->getAtom(XAtom::net_wm_window_type_menu
))
234 void screen::updateNumDesktops() {
237 if (! _xatom
->getValue(_root
, XAtom::net_number_of_desktops
, XAtom::cardinal
,
238 (unsigned long)_num_desktops
))
239 _num_desktops
= 1; // assume that there is at least 1 desktop!
243 void screen::updateActiveDesktop() {
246 if (! _xatom
->getValue(_root
, XAtom::net_current_desktop
, XAtom::cardinal
,
247 (unsigned long)_active_desktop
))
248 _active_desktop
= 0; // there must be at least one desktop, and it must
249 // be the current one
253 void screen::updateClientList() {
256 WindowList::iterator insert_point
= _active
;
257 if (insert_point
!= _clients
.end())
258 ++insert_point
; // get to the item client the focused client
260 // get the client list from the root window
261 Window
*rootclients
= 0;
262 unsigned long num
= (unsigned) -1;
263 if (! _xatom
->getValue(_root
, XAtom::net_client_list
, XAtom::window
, num
,
265 while (! _clients
.empty()) {
266 delete _clients
.front();
267 _clients
.erase(_clients
.begin());
269 if (rootclients
) delete [] rootclients
;
273 WindowList::iterator it
, end
= _clients
.end();
276 // insert new clients after the active window
277 for (i
= 0; i
< num
; ++i
) {
278 for (it
= _clients
.begin(); it
!= end
; ++it
)
279 if (**it
== rootclients
[i
])
281 if (it
== end
) { // didn't already exist
282 if (doAddWindow(rootclients
[i
])) {
283 cout
<< "Added window: 0x" << hex
<< rootclients
[i
] << dec
<< endl
;
284 _clients
.insert(insert_point
, new XWindow(_epist
, this,
290 // remove clients that no longer exist
291 for (it
= _clients
.begin(); it
!= end
;) {
292 WindowList::iterator it2
= it
++;
293 for (i
= 0; i
< num
; ++i
)
294 if (**it2
== rootclients
[i
])
296 if (i
== num
) { // no longer exists
297 cout
<< "Removed window: 0x" << hex
<< (*it2
)->window() << dec
<< endl
;
303 if (rootclients
) delete [] rootclients
;
307 void screen::updateActiveWindow() {
311 _xatom
->getValue(_root
, XAtom::net_active_window
, XAtom::window
, a
);
313 WindowList::iterator it
, end
= _clients
.end();
314 for (it
= _clients
.begin(); it
!= end
; ++it
) {
320 cout
<< "Active window is now: ";
321 if (_active
== _clients
.end()) cout
<< "None\n";
322 else cout
<< "0x" << hex
<< (*_active
)->window() << dec
<< endl
;
326 * use this when execing a command to have it on the right screen
327 string dtmp = (string)"DISPLAY=" + display_name;
328 if (putenv(const_cast<char*>(dtmp.c_str()))) {
329 cout << "warning: couldn't set environment variable 'DISPLAY'\n";
335 void screen::cycleWindow(const bool forward
, const bool alldesktops
) const {
338 if (_clients
.empty()) return;
340 WindowList::const_iterator target
= _active
;
342 if (target
== _clients
.end())
343 target
= _clients
.begin();
348 if (target
== _clients
.end())
349 target
= _clients
.begin();
351 if (target
== _clients
.begin())
352 target
= _clients
.end();
355 } while (target
== _clients
.end() ||
356 (*target
)->iconic() ||
357 (! alldesktops
&& (*target
)->desktop() != _active_desktop
));
359 if (target
!= _clients
.end())
364 void screen::cycleWorkspace(const bool forward
, const bool loop
) const {
367 unsigned int destination
= _active_desktop
;
370 if (destination
< _num_desktops
- 1)
378 destination
= _num_desktops
- 1;
381 if (destination
!= _active_desktop
)
382 changeWorkspace(destination
);
386 void screen::changeWorkspace(const int num
) const {
389 _xatom
->sendClientMessage(_root
, XAtom::net_current_desktop
, _root
, num
);