workspace/kscreensaver/krandom_screensaver/random.cpp

   1 //-----------------------------------------------------------------------------
   2 //
   3 // Screen savers for KDE
   4 //
   5 // Copyright (c)  Martin R. Jones 1999
   6 //
   7 // This is an extremely simple program that starts a random screensaver.
   8 //
   9
  10 #include <config-workspace.h>
  11
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <time.h>
  15 #include <unistd.h>
  16
  17 #include <QTextStream>
  18 #include <QLayout>
  19 #include <QCheckBox>
  20 #include <QWidget>
  21 //Added by qt3to4:
  22 #include <QGridLayout>
  23
  24 #include <kapplication.h>
  25 #include <kstandarddirs.h>
  26 #include <kglobal.h>
  27 #include <klocale.h>
  28 #include <kdesktopfile.h>
  29 #include <krandomsequence.h>
  30 #include <kdebug.h>
  31 #include <kcmdlineargs.h>
  32 #include <kdialog.h>
  33 #include <kconfig.h>
  34 #include <kservice.h>
  35 #include "kscreensaver_vroot.h"
  36 #include "random.h"
  37 #include <QX11Info>
  38 #include <QFrame>
  39 #include <kservicetypetrader.h>
  40 #define MAX_ARGS    20
  41
  42 void usage(char *name)
  43 {
  44         puts(i18n("Usage: %1 [-setup] [args]\n"
  45                                 "Starts a random screen saver.\n"
  46                                 "Any arguments (except -setup) are passed on to the screen saver.", name ).toLocal8Bit().data());
  47 }
  48
  49 static const char appName[] = "random";
  50
  51 static const char description[] = I18N_NOOP("Start a random KDE screen saver");
  52
  53 static const char version[] = "2.0.0";
  54
  55 static QString exeFromActionGroup(const QList<KServiceAction>& actions, const char* name)
  56 {
  57     foreach(const KServiceAction& action, actions) {
  58         if (action.name() == name)
  59             return action.exec();
  60     }
  61     return QString();
  62 }
  63
  64 //----------------------------------------------------------------------------
  65
  66 int main(int argc, char *argv[])
  67 {
  68         KCmdLineArgs::init(argc, argv, appName, "kscreensaver", ki18n("Random screen saver"), version, ki18n(description));
  69
  70
  71         KCmdLineOptions options;
  72
  73         options.add("setup", ki18n("Setup screen saver"));
  74
  75         options.add("window-id wid", ki18n("Run in the specified XWindow"));
  76
  77         options.add("root", ki18n("Run in the root XWindow"));
  78
  79         KCmdLineArgs::addCmdLineOptions(options);
  80
  81         KApplication app;
  82
  83         Window windowId = 0;
  84
  85         KCmdLineArgs *args = KCmdLineArgs::parsedArgs();
  86
  87         if (args->isSet("setup"))
  88         {
  89                 KRandomSetup setup;
  90                 setup.exec();
  91                 exit(0);
  92         }
  93
  94         if (args->isSet("window-id"))
  95         {
  96                 windowId = args->getOption("window-id").toInt();
  97         }
  98
  99         if (args->isSet("root"))
 100         {
 101                 QX11Info info;
 102                 windowId = RootWindow(QX11Info::display(), info.screen());
 103         }
 104         args->clear();
 105         const KService::List lst = KServiceTypeTrader::self()->query( "ScreenSaver");
 106         KService::List availableSavers;
 107
 108         KConfig type("krandom.kssrc", KConfig::NoGlobals);
 109         const KConfigGroup configGroup = type.group("Settings");
 110         const bool opengl = configGroup.readEntry("OpenGL", false);
 111         const bool manipulatescreen = configGroup.readEntry("ManipulateScreen", false);
 112         // TODO replace this with TryExec=fortune in the desktop files
 113         const bool fortune = !KStandardDirs::findExe("fortune").isEmpty();
 114         foreach( const KService::Ptr& service, lst ) {
 115             //QString file = KStandardDirs::locate("services", service->entryPath());
 116             //kDebug() << "Looking at " << file;
 117             const QString saverType = service->property("X-KDE-Type").toString();
 118             if (saverType.isEmpty()) { // no X-KDE-Type defined so must be OK
 119                 availableSavers.append(service);
 120             } else {
 121                 const QStringList saverTypes = saverType.split( ";");
 122                 for (QStringList::ConstIterator it =  saverTypes.begin(); it != saverTypes.end(); ++it ) {
 123                     kDebug() << "saverTypes is "<< *it;
 124                     if (*it == "ManipulateScreen") {
 125                         if (manipulatescreen) {
 126                             availableSavers.append(service);
 127                         }
 128                     } else if (*it == "OpenGL") {
 129                         if (opengl) {
 130                             availableSavers.append(service);
 131                         }
 132                     } else if (*it == "Fortune") {
 133                         if (fortune) {
 134                             availableSavers.append(service);
 135                         }
 136                     }
 137                 }
 138             }
 139         }
 140
 141         KRandomSequence rnd;
 142         const int indx = rnd.getLong(availableSavers.count());
 143         const KService::Ptr service = availableSavers.at(indx);
 144         const QList<KServiceAction> actions = service->actions();
 145
 146         QString cmd;
 147         if (windowId)
 148             cmd = exeFromActionGroup(actions, "InWindow");
 149         if (cmd.isEmpty() && windowId == 0)
 150             cmd = exeFromActionGroup(actions, "Root");
 151         if (cmd.isEmpty())
 152             cmd = service->exec();
 153
 154         QTextStream ts(&cmd, QIODevice::ReadOnly);
 155         QString word;
 156         ts >> word;
 157         QString exeFile = KStandardDirs::findExe(word);
 158
 159         if (!exeFile.isEmpty())
 160         {
 161                 char *sargs[MAX_ARGS];
 162                 sargs[0] = new char [strlen(word.toAscii())+1];
 163                 strcpy(sargs[0], word.toAscii());
 164
 165                 int i = 1;
 166                 while (!ts.atEnd() && i < MAX_ARGS-1)
 167                 {
 168                         ts >> word;
 169                         if (word == "%w")
 170                         {
 171                                 word = word.setNum(windowId);
 172                         }
 173
 174                         sargs[i] = new char [strlen(word.toAscii())+1];
 175                         strcpy(sargs[i], word.toAscii());
 176                         kDebug() << "word is " << word.toAscii();
 177
 178                         i++;
 179                 }
 180
 181                 sargs[i] = 0;
 182
 183                 execv(exeFile.toAscii(), sargs);
 184         }
 185
 186         // If we end up here then we couldn't start a saver.
 187         // If we have been supplied a window id or root window then blank it.
 188         QX11Info info;
 189         Window win = windowId ? windowId : RootWindow(QX11Info::display(), info.screen());
 190         XSetWindowBackground(QX11Info::display(), win,
 191                         BlackPixel(QX11Info::display(), info.screen()));
 192         XClearWindow(QX11Info::display(), win);
 193 }
 194
 195
 196 KRandomSetup::KRandomSetup( QWidget *parent, const char *name )
 197         : KDialog( parent )
 198 {
 199   setObjectName( name );
 200   setModal( true );
 201   setCaption( i18n( "Setup Random Screen Saver" ) );
 202   setButtons( Ok | Cancel );
 203   showButtonSeparator( true );
 204
 205         QFrame *main = new QFrame( this );
 206   setMainWidget( main );
 207         QGridLayout *grid = new QGridLayout(main );
 208         grid->setSpacing( spacingHint() );
 209
 210         openGL = new QCheckBox( i18n("Use OpenGL screen savers"), main );
 211         grid->addWidget(openGL, 0, 0);
 212
 213         manipulateScreen = new QCheckBox(i18n("Use screen savers that manipulate the screen"), main);
 214         grid->addWidget(manipulateScreen, 1, 0);
 215
 216         setMinimumSize( sizeHint() );
 217
 218         KConfig config("krandom.kssrc", KConfig::NoGlobals);
 219         const KConfigGroup configGroup = config.group("Settings");
 220         openGL->setChecked(configGroup.readEntry("OpenGL", true));
 221         manipulateScreen->setChecked(configGroup.readEntry("ManipulateScreen", true));
 222
 223   connect( this, SIGNAL( okClicked() ), SLOT( slotOk() ) );
 224 }
 225
 226 void KRandomSetup::slotOk()
 227 {
 228     KConfig config("krandom.kssrc");
 229     KConfigGroup configGroup = config.group("Settings");
 230     configGroup.writeEntry("OpenGL", openGL->isChecked());
 231     configGroup.writeEntry("ManipulateScreen", manipulateScreen->isChecked());
 232
 233     accept();
 234 }
 235
 236 #include "random.moc"