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twin

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main.cpp
1 /*****************************************************************
2  KWin - the KDE window manager
3  This file is part of the KDE project.
4 
5 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
6 Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
7 
8 You can Freely distribute this program under the GNU General Public
9 License. See the file "COPYING" for the exact licensing terms.
10 ******************************************************************/
11 
12 #include <tdeconfig.h>
13 
14 #include "main.h"
15 
16 #include <tdelocale.h>
17 #include <tdeglobal.h>
18 #include <kdebug.h>
19 #include <stdlib.h>
20 #include <tdecmdlineargs.h>
21 #include <tdeaboutdata.h>
22 #include <dcopclient.h>
23 #include <dcopref.h>
24 #include <unistd.h>
25 #include <signal.h>
26 #include <fcntl.h>
27 
28 #include "atoms.h"
29 #include "options.h"
30 #include "sm.h"
31 
32 #define INT8 _X11INT8
33 #define INT32 _X11INT32
34 #include <X11/Xproto.h>
35 #undef INT8
36 #undef INT32
37 
38 namespace KWinInternal
39 {
40 
41 Options* options;
42 
43 Atoms* atoms;
44 
45 int screen_number = -1;
46 bool disable_twin_composition_manager = false;
47 
48 static bool initting = FALSE;
49 
50 static
51 int x11ErrorHandler(Display *d, XErrorEvent *e)
52  {
53  char msg[80], req[80], number[80];
54  bool ignore_badwindow = TRUE; //maybe temporary
55 
56  if (initting &&
57  (
58  e->request_code == X_ChangeWindowAttributes
59  || e->request_code == X_GrabKey
60  )
61  && (e->error_code == BadAccess))
62  {
63  fputs(i18n("[twin] it looks like there's already a window manager running. twin not started.\n").local8Bit(), stderr);
64  exit(1);
65  }
66 
67  if (ignore_badwindow && (e->error_code == BadWindow || e->error_code == BadColor))
68  return 0;
69 
70  XGetErrorText(d, e->error_code, msg, sizeof(msg));
71  sprintf(number, "%d", e->request_code);
72  XGetErrorDatabaseText(d, "XRequest", number, "<unknown>", req, sizeof(req));
73 
74  fprintf(stderr, "[twin] %s(0x%lx): %s\n", req, e->resourceid, msg);
75 
76  if (initting)
77  {
78  fputs(i18n("[twin] failure during initialization; aborting").local8Bit(), stderr);
79  exit(1);
80  }
81  return 0;
82  }
83 
84 Application::Application( )
85 : TDEApplication( ), owner( screen_number )
86  {
87  TDECmdLineArgs* args = TDECmdLineArgs::parsedArgs();
88  if (!config()->isImmutable() && args->isSet("lock"))
89  {
90  config()->setReadOnly(true);
91  config()->reparseConfiguration();
92  }
93 
94  if (screen_number == -1) {
95  screen_number = DefaultScreen(tqt_xdisplay());
96  }
97 
98  if (args->isSet( "disablecompositionmanager" )) {
99  disable_twin_composition_manager = true;
100  }
101 
102  if( !owner.claim( args->isSet( "replace" ), true ))
103  {
104  Display* dpy = tqt_xdisplay();
105  Window w;
106  Atom a;
107  static char net_wm_sm[] = "WM_Sxx";
108 
109  snprintf (net_wm_sm, sizeof (net_wm_sm), "WM_S%d", screen_number);
110  a = XInternAtom (dpy, net_wm_sm, False);
111 
112  w = XGetSelectionOwner (dpy, a);
113 
114  if (w != None)
115  {
116  Atom actual;
117  int format;
118  unsigned long n, left;
119  unsigned char *data;
120  Atom twinRunningAtom = XInternAtom (dpy, "_KDE_WM_IS_KWIN", True);
121 
122  int result = XGetWindowProperty (dpy, w, twinRunningAtom, 0L, 1L, False,
123  XA_ATOM, &actual, &format,
124  &n, &left, &data);
125 
126  if (result == Success && data != None && format == 32 )
127  {
128  Atom a;
129  a = *(long*)data;
130  XFree ( (void *) data);
131  if( !owner.claim( true, true ))
132  {
133  fputs(i18n("[twin] unable to claim manager selection, another wm running? (try using --replace)\n").local8Bit(), stderr);
134  ::exit(1);
135  }
136  }
137  else
138  {
139  fputs(i18n("[twin] unable to claim manager selection, another wm running? (try using --replace)\n").local8Bit(), stderr);
140  ::exit(1);
141  }
142  }
143  else
144  {
145  fputs(i18n("[twin] unable to claim manager selection, another wm running? (try using --replace)\n").local8Bit(), stderr);
146  ::exit(1);
147  }
148  }
149  connect( &owner, TQ_SIGNAL( lostOwnership()), TQ_SLOT( lostSelection()));
150 
151  // if there was already twin running, it saved its configuration after loosing the selection -> reread
152  config()->reparseConfiguration();
153 
154  initting = TRUE; // startup....
155 
156  // install X11 error handler
157  XSetErrorHandler( x11ErrorHandler );
158 
159  // check whether another windowmanager is running
160  XSelectInput(tqt_xdisplay(), tqt_xrootwin(), SubstructureRedirectMask );
161  syncX(); // trigger error now
162 
163  options = new Options;
164  atoms = new Atoms;
165 
166  // Signal that we are The KWin!
167  Atom kde_wm_system_modal_notification;
168  kde_wm_system_modal_notification = XInternAtom(tqt_xdisplay(), "_KDE_WM_IS_KWIN", False);
169  XChangeProperty(tqt_xdisplay(), owner.ownerWindow(), kde_wm_system_modal_notification, XA_INTEGER, 32, PropModeReplace, (unsigned char *) "TRUE", 1L);
170 
171  // create workspace.
172  (void) new Workspace( isSessionRestored() );
173 
174  syncX(); // trigger possible errors, there's still a chance to abort
175 
176  DCOPRef ref( "kded", "kded" );
177  ref.send( "unloadModule", TQCString( "kdetrayproxy" ));
178 
179  initting = FALSE; // startup done, we are up and running now.
180 
181  dcopClient()->send( "ksplash", "", "upAndRunning(TQString)", TQString("wm started"));
182  XEvent e;
183  e.xclient.type = ClientMessage;
184  e.xclient.message_type = XInternAtom( tqt_xdisplay(), "_KDE_SPLASH_PROGRESS", False );
185  e.xclient.display = tqt_xdisplay();
186  e.xclient.window = tqt_xrootwin();
187  e.xclient.format = 8;
188  strcpy( e.xclient.data.b, "wm started" );
189  XSendEvent( tqt_xdisplay(), tqt_xrootwin(), False, SubstructureNotifyMask, &e );
190  }
191 
192 Application::~Application()
193  {
194  delete Workspace::self();
195  if( owner.ownerWindow() != None ) // if there was no --replace (no new WM)
196  {
197  XSetInputFocus( tqt_xdisplay(), PointerRoot, RevertToPointerRoot, get_tqt_x_time() );
198  DCOPRef ref( "kded", "kded" );
199  if( !ref.send( "loadModule", TQCString( "kdetrayproxy" )))
200  kdWarning( 176 ) << "Loading of kdetrayproxy failed." << endl;
201  }
202  delete options;
203  }
204 
205 void Application::lostSelection()
206  {
207  delete Workspace::self();
208  // remove windowmanager privileges
209  XSelectInput(tqt_xdisplay(), tqt_xrootwin(), PropertyChangeMask );
210  DCOPRef ref( "kded", "kded" );
211  if( !ref.send( "loadModule", TQCString( "kdetrayproxy" )))
212  kdWarning( 176 ) << "Loading of kdetrayproxy failed." << endl;
213  quit();
214  }
215 
216 bool Application::x11EventFilter( XEvent *e )
217  {
218  if ( Workspace::self()->workspaceEvent( e ) )
219  return TRUE;
220  return TDEApplication::x11EventFilter( e );
221  }
222 
223 static void sighandler(int)
224  {
225  TQApplication::exit();
226  }
227 
228 
229 } // namespace
230 
231 static const char version[] = "3.0";
232 static const char description[] = I18N_NOOP( "TDE window manager" );
233 
234 static TDECmdLineOptions args[] =
235  {
236  { "lock", I18N_NOOP("Disable configuration options"), 0 },
237  { "replace", I18N_NOOP("Replace already-running ICCCM2.0-compliant window manager"), 0 },
238  { "disablecompositionmanager", I18N_NOOP("Do not start composition manager"), 0 },
239  TDECmdLineLastOption
240  };
241 
242 extern "C"
243 TDE_EXPORT int kdemain( int argc, char * argv[] )
244  {
245  bool restored = false;
246  for (int arg = 1; arg < argc; arg++)
247  {
248  if (! qstrcmp(argv[arg], "-session"))
249  {
250  restored = true;
251  break;
252  }
253  }
254 
255  if (! restored)
256  {
257  // we only do the multihead fork if we are not restored by the session
258  // manager, since the session manager will register multiple twins,
259  // one for each screen...
260  TQCString multiHead = getenv("TDE_MULTIHEAD");
261  if (multiHead.lower() == "true")
262  {
263 
264  Display* dpy = XOpenDisplay( NULL );
265  if ( !dpy )
266  {
267  fprintf(stderr, "%s: FATAL ERROR while trying to open display %s\n",
268  argv[0], XDisplayName(NULL ) );
269  exit (1);
270  }
271 
272  int number_of_screens = ScreenCount( dpy );
273  KWinInternal::screen_number = DefaultScreen( dpy );
274  int pos; // temporarily needed to reconstruct DISPLAY var if multi-head
275  TQCString display_name = XDisplayString( dpy );
276  XCloseDisplay( dpy );
277  dpy = 0;
278 
279  if ((pos = display_name.findRev('.')) != -1 )
280  display_name.remove(pos,10); // 10 is enough to be sure we removed ".s"
281 
282  TQCString envir;
283  if (number_of_screens != 1)
284  {
285  for (int i = 0; i < number_of_screens; i++ )
286  {
287  // if execution doesn't pass by here, then twin
288  // acts exactly as previously
289  if ( i != KWinInternal::screen_number && fork() == 0 )
290  {
291  KWinInternal::screen_number = i;
292  // break here because we are the child process, we don't
293  // want to fork() anymore
294  break;
295  }
296  }
297  // in the next statement, display_name shouldn't contain a screen
298  // number. If it had it, it was removed at the "pos" check
299  envir.sprintf("DISPLAY=%s.%d", display_name.data(), KWinInternal::screen_number);
300 
301  if (putenv( strdup(envir.data())) )
302  {
303  fprintf(stderr,
304  "[twin] %s: WARNING: unable to set DISPLAY environment variable\n",
305  argv[0]);
306  perror("[twin] putenv()");
307  }
308  }
309  }
310  }
311 
312  TDEGlobal::locale()->setMainCatalogue("twin");
313 
314  TDEAboutData aboutData( "twin", I18N_NOOP("TWin"),
315  version, description, TDEAboutData::License_GPL,
316  I18N_NOOP("(c) 1999-2005, The KDE Developers"));
317  aboutData.addAuthor("Matthias Ettrich",0, "ettrich@kde.org");
318  aboutData.addAuthor("Cristian Tibirna",0, "tibirna@kde.org");
319  aboutData.addAuthor("Daniel M. Duley",0, "mosfet@kde.org");
320  aboutData.addAuthor("Luboš Luňák", I18N_NOOP( "Maintainer" ), "l.lunak@kde.org");
321 
322  TDECmdLineArgs::init(argc, argv, &aboutData);
323  TDECmdLineArgs::addCmdLineOptions( args );
324 
325  if (signal(SIGTERM, KWinInternal::sighandler) == SIG_IGN)
326  signal(SIGTERM, SIG_IGN);
327  if (signal(SIGINT, KWinInternal::sighandler) == SIG_IGN)
328  signal(SIGINT, SIG_IGN);
329  if (signal(SIGHUP, KWinInternal::sighandler) == SIG_IGN)
330  signal(SIGHUP, SIG_IGN);
331 
332  TDEApplication::disableAutoDcopRegistration();
333  KWinInternal::Application a;
334  KWinInternal::SessionManaged weAreIndeed;
335  KWinInternal::SessionSaveDoneHelper helper;
336 
337  fcntl(ConnectionNumber(tqt_xdisplay()), F_SETFD, 1);
338 
339  TQCString appname;
340  if (KWinInternal::screen_number == 0)
341  appname = "twin";
342  else
343  appname.sprintf("twin-screen-%d", KWinInternal::screen_number);
344 
345  TDEGlobal::locale()->insertCatalogue("twin_lib");
346 
347  DCOPClient* client = a.dcopClient();
348  client->registerAs( appname.data(), false);
349  client->setDefaultObject( "KWinInterface" );
350 
351  return a.exec();
352  }
353 
354 #include "main.moc"

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