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/BaseDisplay.hh"
44 #include "../../src/XAtom.hh"
49 screen::screen(epist *epist, int number) {
51 _xatom = _epist->xatom();
53 _active = _clients.end();
54 _info = _epist->getScreenInfo(_number);
55 _root = _info->getRootWindow();
57 // find a window manager supporting NETWM, waiting for it to load if we must
58 int count = 20; // try for 20 seconds
60 while (! (_epist->doShutdown() || _managed || count <= 0)) {
61 if (! (_managed = findSupportingWM()))
66 cout << "Found compatible window manager '" << _wm_name << "' for screen "
69 cout << "Unable to find a compatible window manager for screen " <<
74 XSelectInput(_epist->getXDisplay(), _root, PropertyChangeMask);
77 updateActiveDesktop();
85 XSelectInput(_epist->getXDisplay(), _root, None);
89 bool screen::findSupportingWM() {
91 if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
92 support_win) || support_win == None)
96 _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
102 XWindow *screen::findWindow(const XEvent &e) const {
105 WindowList::const_iterator it, end = _clients.end();
106 for (it = _clients.begin(); it != end; ++it)
107 if (**it == e.xany.window)
115 void screen::processEvent(const XEvent &e) {
117 assert(e.xany.window == _root);
120 if (e.xany.window != _root) {
121 window = findWindow(e); // find the window
122 assert(window); // we caught an event for a window we don't know about!?
128 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_number_of_desktops))
130 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_current_desktop))
131 updateActiveDesktop();
132 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
133 updateActiveWindow();
134 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) {
135 // catch any window unmaps first
137 if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
138 DestroyNotify, &ev) ||
139 XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
153 void screen::handleKeypress(const XEvent &e) {
154 ActionList::const_iterator it = _epist->actions().begin();
155 ActionList::const_iterator end = _epist->actions().end();
156 for (; it != end; ++it) {
157 if (e.xkey.keycode == it->keycode() &&
158 e.xkey.state == it->modifierMask()) {
159 switch (it->type()) {
160 case Action::nextWorkspace:
161 cycleWorkspace(true);
164 case Action::prevWorkspace:
165 cycleWorkspace(false);
168 case Action::nextWindow:
172 case Action::prevWindow:
176 case Action::nextWindowOnAllWorkspaces:
177 cycleWindow(true, true);
180 case Action::prevWindowOnAllWorkspaces:
181 cycleWindow(false, true);
184 case Action::nextWindowOfClass:
185 cycleWindow(true, false, true);
188 case Action::prevWindowOfClass:
189 cycleWindow(false, false, true);
192 case Action::nextWindowOfClassOnAllWorkspaces:
193 cycleWindow(true, true, true);
196 case Action::prevWindowOfClassOnAllWorkspaces:
197 cycleWindow(false, true, true);
200 case Action::changeWorkspace:
201 changeWorkspace(it->number());
204 case Action::execute:
205 execCommand("aterm");
209 // these actions require an active window
210 if (_active != _clients.end()) {
211 XWindow *window = *_active;
213 switch (it->type()) {
214 case Action::iconify:
230 case Action::sendToWorkspace:
231 window->sendTo(it->number());
234 case Action::toggleomnipresent:
235 if (window->desktop() == 0xffffffff)
236 window->sendTo(_active_desktop);
238 window->sendTo(0xffffffff);
241 case Action::toggleshade:
242 window->shade(! window->shaded());
250 // do we want to add this window to our list?
251 bool screen::doAddWindow(Window window) const {
255 if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
259 if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
260 type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
267 void screen::updateNumDesktops() {
270 if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
271 (unsigned long)_num_desktops))
272 _num_desktops = 1; // assume that there is at least 1 desktop!
276 void screen::updateActiveDesktop() {
279 if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
280 (unsigned long)_active_desktop))
281 _active_desktop = 0; // there must be at least one desktop, and it must
282 // be the current one
286 void screen::updateClientList() {
289 WindowList::iterator insert_point = _active;
290 if (insert_point != _clients.end())
291 ++insert_point; // get to the item client the focused client
293 // get the client list from the root window
294 Window *rootclients = 0;
295 unsigned long num = (unsigned) -1;
296 if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
298 while (! _clients.empty()) {
299 delete _clients.front();
300 _clients.erase(_clients.begin());
302 if (rootclients) delete [] rootclients;
306 WindowList::iterator it, end = _clients.end();
309 // insert new clients after the active window
310 for (i = 0; i < num; ++i) {
311 for (it = _clients.begin(); it != end; ++it)
312 if (**it == rootclients[i])
314 if (it == end) { // didn't already exist
315 if (doAddWindow(rootclients[i])) {
316 cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
317 _clients.insert(insert_point, new XWindow(_epist, this,
323 // remove clients that no longer exist
324 for (it = _clients.begin(); it != end;) {
325 WindowList::iterator it2 = it++;
326 for (i = 0; i < num; ++i)
327 if (**it2 == rootclients[i])
329 if (i == num) { // no longer exists
330 cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
336 if (rootclients) delete [] rootclients;
340 void screen::updateActiveWindow() {
344 _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
346 WindowList::iterator it, end = _clients.end();
347 for (it = _clients.begin(); it != end; ++it) {
353 cout << "Active window is now: ";
354 if (_active == _clients.end()) cout << "None\n";
355 else cout << "0x" << hex << (*_active)->window() << dec << endl;
359 void screen::execCommand(const std::string &cmd) const {
361 if ((pid = fork()) == 0) {
362 extern char **environ;
364 char *const argv[] = {
367 const_cast<char *>(cmd.c_str()),
370 // make the command run on the correct screen
371 if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
372 cout << "warning: couldn't set environment variable 'DISPLAY'\n";
375 execve("/bin/sh", argv, environ);
377 } else if (pid == -1) {
378 cout << _epist->getApplicationName() <<
379 ": Could not fork a process for executing a command\n";
384 void screen::cycleWindow(const bool forward, const bool alldesktops,
385 const bool sameclass) const {
388 if (_clients.empty()) return;
390 WindowList::const_iterator target = _active;
392 if (target == _clients.end())
393 target = _clients.begin();
398 if (target == _clients.end())
399 target = _clients.begin();
401 if (target == _clients.begin())
402 target = _clients.end();
405 } while (target == _clients.end() ||
406 (*target)->iconic() ||
407 (! alldesktops && (*target)->desktop() != _active_desktop) ||
408 (sameclass && _active != _clients.end() &&
409 (*target)->appClass() != (*_active)->appClass()));
411 if (target != _clients.end())
416 void screen::cycleWorkspace(const bool forward, const bool loop) const {
419 unsigned int destination = _active_desktop;
422 if (destination < _num_desktops - 1)
430 destination = _num_desktops - 1;
433 if (destination != _active_desktop)
434 changeWorkspace(destination);
438 void screen::changeWorkspace(const int num) const {
441 _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);