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);
81 XSelectInput(_epist->getXDisplay(), _root, None);
85 bool screen::findSupportingWM() {
87 if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
88 support_win) || support_win == None)
92 _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
98 XWindow *screen::findWindow(const XEvent &e) const {
101 WindowList::const_iterator it, end = _clients.end();
102 for (it = _clients.begin(); it != end; ++it)
103 if (**it == e.xany.window)
111 void screen::processEvent(const XEvent &e) {
113 assert(e.xany.window == _root);
116 if (e.xany.window != _root) {
117 window = findWindow(e); // find the window
118 assert(window); // we caught an event for a window we don't know about!?
124 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
125 updateActiveWindow();
126 if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) {
127 // catch any window unmaps first
129 if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
130 DestroyNotify, &ev) ||
131 XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window,
145 void screen::handleKeypress(const XEvent &e) {
146 ActionList::const_iterator it = _epist->actions().begin();
147 ActionList::const_iterator end = _epist->actions().end();
148 for (; it != end; ++it) {
149 if (e.xkey.keycode == it->keycode() &&
150 e.xkey.state == it->modifierMask()) {
151 switch (it->type()) {
152 case Action::nextWorkspace:
153 cycleWorkspace(true);
156 case Action::prevWorkspace:
157 cycleWorkspace(false);
160 case Action::changeWorkspace:
161 changeWorkspace(it->number());
165 (*_active)->shade(! (*_active)->shaded());
174 // do we want to add this window to our list?
175 bool screen::doAddWindow(Window window) const {
179 if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom,
183 if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) ||
184 type == _xatom->getAtom(XAtom::net_wm_window_type_menu))
191 void screen::updateClientList() {
194 WindowList::iterator insert_point = _active;
195 if (insert_point != _clients.end())
196 ++insert_point; // get to the item client the focused client
198 // get the client list from the root window
199 Window *rootclients = 0;
200 unsigned long num = (unsigned) -1;
201 if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num,
203 while (! _clients.empty()) {
204 delete _clients.front();
205 _clients.erase(_clients.begin());
207 if (rootclients) delete [] rootclients;
211 WindowList::iterator it, end = _clients.end();
214 // insert new clients after the active window
215 for (i = 0; i < num; ++i) {
216 for (it = _clients.begin(); it != end; ++it)
217 if (**it == rootclients[i])
219 if (it == end) { // didn't already exist
220 if (doAddWindow(rootclients[i])) {
221 cout << "Added window: 0x" << hex << rootclients[i] << dec << endl;
222 _clients.insert(insert_point, new XWindow(_epist, this,
228 // remove clients that no longer exist
229 for (it = _clients.begin(); it != end;) {
230 WindowList::iterator it2 = it++;
231 for (i = 0; i < num; ++i)
232 if (**it2 == rootclients[i])
234 if (i == num) { // no longer exists
235 cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl;
241 if (rootclients) delete [] rootclients;
245 void screen::updateActiveWindow() {
249 _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a);
251 WindowList::iterator it, end = _clients.end();
252 for (it = _clients.begin(); it != end; ++it) {
258 cout << "Active window is now: ";
259 if (_active == _clients.end()) cout << "None\n";
260 else cout << "0x" << hex << (*_active)->window() << dec << endl;
264 * use this when execing a command to have it on the right screen
265 string dtmp = (string)"DISPLAY=" + display_name;
266 if (putenv(const_cast<char*>(dtmp.c_str()))) {
267 cout << "warning: couldn't set environment variable 'DISPLAY'\n";
272 void screen::cycleWorkspace(const bool forward) const {
273 unsigned long currentDesktop = 0;
274 unsigned long numDesktops = 0;
276 if (_xatom->getValue(_root, XAtom::net_current_desktop, XAtom::cardinal,
283 _xatom->getValue(_root, XAtom::net_number_of_desktops, XAtom::cardinal,
286 if ( ( (signed)currentDesktop) == -1)
287 currentDesktop = numDesktops - 1;
288 else if (currentDesktop >= numDesktops)
291 changeWorkspace(currentDesktop);
295 void screen::changeWorkspace(const int num) const {
296 _xatom->sendClientMessage(_root, XAtom::net_current_desktop, _root, num);