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
30 #endif // HAVE_STDIO_H
33 # include <sys/types.h>
35 #endif // HAVE_UNISTD_H
47 #include "../../src/BaseDisplay.hh"
48 #include "../../src/XAtom.hh"
53 screen::screen(epist *epist, int number) {
55 _xatom = _epist->xatom();
57 _active = _clients.end();
58 _info = _epist->getScreenInfo(_number);
59 _root = _info->getRootWindow();
61 // find a window manager supporting NETWM, waiting for it to load if we must
62 int count = 20; // try for 20 seconds
64 while (! (_epist->doShutdown() || _managed || count <= 0)) {
65 if (! (_managed = findSupportingWM()))
70 cout << "Found compatible window manager '" << _wm_name << "' for screen "
73 cout << "Unable to find a compatible window manager for screen " <<
78 XSelectInput(_epist->getXDisplay(), _root, PropertyChangeMask);
81 updateActiveDesktop();
89 XSelectInput(_epist->getXDisplay(), _root, None);
93 bool screen::findSupportingWM() {
95 if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
96 support_win) || support_win == None)
100 _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
106 XWindow *screen::findWindow(const XEvent &e) const {
109 WindowList::const_iterator it, end = _clients.end();
110 for (it = _clients.begin(); it != end; ++it)
111 if (**it == e.xany.window)
119 void screen::processEvent(const XEvent &e) {
121 assert(e.xany.window == _root);
124 if (e.xany.window != _root) {
125 window = findWindow(e); // find the window
126 assert(window); // we caught an event for a window we don't know about!?
132 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_number_of_desktops))
134 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_current_desktop))
135 updateActiveDesktop();
136 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
137 updateActiveWindow();
138 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) {
139 // catch any window unmaps first
141 if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
142 DestroyNotify, &ev) ||
143 XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
157 void screen::handleKeypress(const XEvent &e) {
158 ActionList::const_iterator it = _epist->actions().begin();
159 ActionList::const_iterator end = _epist->actions().end();
160 for (; it != end; ++it) {
161 if (e.xkey.keycode == it->keycode() &&
162 e.xkey.state == it->modifierMask()) {
163 switch (it->type()) {
164 case Action::nextWorkspace:
165 cycleWorkspace(true);
168 case Action::prevWorkspace:
169 cycleWorkspace(false);
172 case Action::nextWindow:
176 case Action::prevWindow:
180 case Action::nextWindowOnAllWorkspaces:
181 cycleWindow(true, true);
184 case Action::prevWindowOnAllWorkspaces:
185 cycleWindow(false, true);
188 case Action::nextWindowOfClass:
189 cycleWindow(true, false, true, it->string());
192 case Action::prevWindowOfClass:
193 cycleWindow(false, false, true, it->string());
196 case Action::nextWindowOfClassOnAllWorkspaces:
197 cycleWindow(true, true, true, it->string());
200 case Action::prevWindowOfClassOnAllWorkspaces:
201 cycleWindow(false, true, true, it->string());
204 case Action::changeWorkspace:
205 changeWorkspace(it->number());
208 case Action::execute:
209 execCommand(it->string());
216 // these actions require an active window
217 if (_active != _clients.end()) {
218 XWindow *window = *_active;
220 switch (it->type()) {
221 case Action::iconify:
237 case Action::sendToWorkspace:
238 window->sendTo(it->number());
241 case Action::toggleomnipresent:
242 if (window->desktop() == 0xffffffff)
243 window->sendTo(_active_desktop);
245 window->sendTo(0xffffffff);
248 case Action::moveWindowUp:
249 window->move(window->x(), window->y() - it->number());
252 case Action::moveWindowDown:
253 window->move(window->x(), window->y() + it->number());
256 case Action::moveWindowLeft:
257 window->move(window->x() - it->number(), window->y());
260 case Action::moveWindowRight:
261 window->move(window->x() + it->number(), window->y());
264 case Action::resizeWindowWidth:
265 window->resize(window->width() + it->number(), window->height());
268 case Action::resizeWindowHeight:
269 window->resize(window->width(), window->height() + it->number());
272 case Action::toggleshade:
273 window->shade(! window->shaded());
276 case Action::toggleMaximizeHorizontal:
277 window->toggleMaximize(XWindow::Max_Horz);
280 case Action::toggleMaximizeVertical:
281 window->toggleMaximize(XWindow::Max_Vert);
284 case Action::toggleMaximizeFull:
285 window->toggleMaximize(XWindow::Max_Full);
289 assert(false); // unhandled action type!
297 // do we want to add this window to our list?
298 bool screen::doAddWindow(Window window) const {
302 if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
306 if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
307 type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
314 void screen::updateNumDesktops() {
317 if (! _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
318 (unsigned long)_num_desktops))
319 _num_desktops = 1; // assume that there is at least 1 desktop!
323 void screen::updateActiveDesktop() {
326 if (! _xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
327 (unsigned long)_active_desktop))
328 _active_desktop = 0; // there must be at least one desktop, and it must
329 // be the current one
333 void screen::updateClientList() {
336 WindowList::iterator insert_point = _active;
337 if (insert_point != _clients.end())
338 ++insert_point; // get to the item client the focused client
340 // get the client list from the root window
341 Window *rootclients = 0;
342 unsigned long num = (unsigned) -1;
343 if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
345 while (! _clients.empty()) {
346 delete _clients.front();
347 _clients.erase(_clients.begin());
349 if (rootclients) delete [] rootclients;
353 WindowList::iterator it, end = _clients.end();
356 // insert new clients after the active window
357 for (i = 0; i < num; ++i) {
358 for (it = _clients.begin(); it != end; ++it)
359 if (**it == rootclients[i])
361 if (it == end) { // didn't already exist
362 if (doAddWindow(rootclients[i])) {
363 cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
364 _clients.insert(insert_point, new XWindow(_epist, this,
370 // remove clients that no longer exist
371 for (it = _clients.begin(); it != end;) {
372 WindowList::iterator it2 = it++;
373 for (i = 0; i < num; ++i)
374 if (**it2 == rootclients[i])
376 if (i == num) { // no longer exists
377 cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
383 if (rootclients) delete [] rootclients;
387 void screen::updateActiveWindow() {
391 _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
393 WindowList::iterator it, end = _clients.end();
394 for (it = _clients.begin(); it != end; ++it) {
400 cout << "Active window is now: ";
401 if (_active == _clients.end()) cout << "None\n";
402 else cout << "0x" << hex << (*_active)->window() << dec << endl;
406 void screen::execCommand(const std::string &cmd) const {
408 if ((pid = fork()) == 0) {
409 extern char **environ;
411 char *const argv[] = {
414 const_cast<char *>(cmd.c_str()),
417 // make the command run on the correct screen
418 if (putenv(const_cast<char*>(_info->displayString().c_str()))) {
419 cout << "warning: couldn't set environment variable 'DISPLAY'\n";
422 execve("/bin/sh", argv, environ);
424 } else if (pid == -1) {
425 cout << _epist->getApplicationName() <<
426 ": Could not fork a process for executing a command\n";
431 void screen::cycleWindow(const bool forward, const bool alldesktops,
432 const bool sameclass, const string &cn) const {
435 if (_clients.empty()) return;
437 WindowList::const_iterator target = _active;
439 string classname = cn;
440 if (sameclass && classname.empty() && target != _clients.end())
441 classname = (*target)->appClass();
443 if (target == _clients.end())
444 target = _clients.begin();
449 if (target == _clients.end())
450 target = _clients.begin();
452 if (target == _clients.begin())
453 target = _clients.end();
456 } while (target == _clients.end() ||
457 (*target)->iconic() ||
458 (! alldesktops && (*target)->desktop() != _active_desktop) ||
459 (sameclass && ! classname.empty() &&
460 (*target)->appClass() != classname));
462 if (target != _clients.end())
467 void screen::cycleWorkspace(const bool forward, const bool loop) const {
470 unsigned int destination = _active_desktop;
473 if (destination < _num_desktops - 1)
481 destination = _num_desktops - 1;
484 if (destination != _active_desktop)
485 changeWorkspace(destination);
489 void screen::changeWorkspace(const int num) const {
492 _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);