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);