util/epist/screen.cc (raw)
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// -*- mode: C++; indent-tabs-mode: nil; -*- // screen.cc for Epistory - a key handler for NETWM/EWMH window managers. // Copyright (c) 2002 - 2002 Ben Jansens <ben at orodu.net> // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. #ifdef HAVE_CONFIG_H # include "../../config.h" #endif // HAVE_CONFIG_H extern "C" { #ifdef HAVE_UNISTD_H # include <sys/types.h> # include <unistd.h> #endif // HAVE_UNISTD_H } #include <iostream> #include <string> using std::cout; using std::endl; using std::hex; using std::dec; using std::string; #include "../../src/XAtom.hh" #include "screen.hh" #include "epist.hh" screen::screen(epist *epist, int number) { _epist = epist; _xatom = _epist->xatom(); _number = number; _active = _clients.end(); _root = RootWindow(_epist->getXDisplay(), _number); // find a window manager supporting NETWM, waiting for it to load if we must int count = 20; // try for 20 seconds _managed = false; while (! (_epist->doShutdown() || _managed || count <= 0)) { if (! (_managed = findSupportingWM())) usleep(1000); --count; } if (_managed) cout << "Found compatible window manager '" << _wm_name << "' for screen " << _number << ".\n"; else { cout << "Unable to find a compatible window manager for screen " << _number << ".\n"; return; } XSelectInput(_epist->getXDisplay(), _root, PropertyChangeMask); updateClientList(); updateActiveWindow(); } screen::~screen() { if (_managed) XSelectInput(_epist->getXDisplay(), _root, None); } bool screen::findSupportingWM() { Window support_win; if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window, support_win) || support_win == None) return false; string title; _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title); _wm_name = title; return true; } XWindow *screen::findWindow(const XEvent &e) const { assert(_managed); WindowList::const_iterator it, end = _clients.end(); for (it = _clients.begin(); it != end; ++it) if (**it == e.xany.window) break; if(it == end) return 0; return *it; } void screen::processEvent(const XEvent &e) { assert(_managed); assert(e.xany.window == _root); XWindow *window = 0; if (e.xany.window != _root) { window = findWindow(e); // find the window assert(window); // we caught an event for a window we don't know about!? } switch (e.type) { case PropertyNotify: // root window if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window)) updateActiveWindow(); if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list)) { // catch any window unmaps first XEvent ev; if (XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window, DestroyNotify, &ev) || XCheckTypedWindowEvent(_epist->getXDisplay(), e.xany.window, UnmapNotify, &ev)) { processEvent(ev); } updateClientList(); } break; case KeyPress: break; } } // do we want to add this window to our list? bool screen::doAddWindow(Window window) const { assert(_managed); Atom type; if (! _xatom->getValue(window, XAtom::net_wm_window_type, XAtom::atom, type)) return True; if (type == _xatom->getAtom(XAtom::net_wm_window_type_dock) || type == _xatom->getAtom(XAtom::net_wm_window_type_menu)) return False; return True; } void screen::updateClientList() { assert(_managed); WindowList::iterator insert_point = _active; if (insert_point != _clients.end()) ++insert_point; // get to the item client the focused client // get the client list from the root window Window *rootclients = 0; unsigned long num = (unsigned) -1; if (! _xatom->getValue(_root, XAtom::net_client_list, XAtom::window, num, &rootclients)) { while (! _clients.empty()) { delete _clients.front(); _clients.erase(_clients.begin()); } if (rootclients) delete [] rootclients; return; } WindowList::iterator it, end = _clients.end(); unsigned long i; // insert new clients after the active window for (i = 0; i < num; ++i) { for (it = _clients.begin(); it != end; ++it) if (**it == rootclients[i]) break; if (it == end) { // didn't already exist if (doAddWindow(rootclients[i])) { cout << "Added window: 0x" << hex << rootclients[i] << dec << endl; _clients.insert(insert_point, new XWindow(_epist, rootclients[i])); } } } // remove clients that no longer exist for (it = _clients.begin(); it != end;) { WindowList::iterator it2 = it++; for (i = 0; i < num; ++i) if (**it2 == rootclients[i]) break; if (i == num) { // no longer exists cout << "Removed window: 0x" << hex << (*it2)->window() << dec << endl; delete *it2; _clients.erase(it2); } } if (rootclients) delete [] rootclients; } void screen::updateActiveWindow() { assert(_managed); Window a = None; _xatom->getValue(_root, XAtom::net_active_window, XAtom::window, a); WindowList::iterator it, end = _clients.end(); for (it = _clients.begin(); it != end; ++it) { if (**it == a) break; } _active = it; cout << "Active window is now: "; if (_active == _clients.end()) cout << "None\n"; else cout << "0x" << hex << (*_active)->window() << dec << endl; } /* * use this when execing a command to have it on the right screen string dtmp = (string)"DISPLAY=" + display_name; if (putenv(const_cast<char*>(dtmp.c_str()))) { cout << "warning: couldn't set environment variable 'DISPLAY'\n"; perror("putenv()"); } */ |