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Diffstat (limited to 'kdecore/kuniqueapplication.cpp')
| -rw-r--r-- | kdecore/kuniqueapplication.cpp | 495 |
1 files changed, 495 insertions, 0 deletions
diff --git a/kdecore/kuniqueapplication.cpp b/kdecore/kuniqueapplication.cpp new file mode 100644 index 000000000..1ef94fbbe --- /dev/null +++ b/kdecore/kuniqueapplication.cpp @@ -0,0 +1,495 @@ +/* This file is part of the KDE libraries + Copyright (c) 1999 Preston Brown <pbrown@kde.org> + + $Id$ + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +#include <config.h> + +#include <sys/types.h> +#include <sys/wait.h> + +#include <assert.h> +#include <errno.h> +#include <stdlib.h> +#include <unistd.h> + +#include <qfile.h> +#include <qptrlist.h> +#include <qtimer.h> + +#include <dcopclient.h> +#include <kcmdlineargs.h> +#include <kstandarddirs.h> +#include <kaboutdata.h> + +#if defined Q_WS_X11 +#include <kwin.h> +#include <kstartupinfo.h> +#endif + +#include <kconfig.h> +#include "kdebug.h" +#include "kuniqueapplication.h" + +#if defined Q_WS_X11 +#include <netwm.h> +#include <X11/Xlib.h> +#define DISPLAY "DISPLAY" +#else +# ifdef Q_WS_QWS +# define DISPLAY "QWS_DISPLAY" +# else +# define DISPLAY "DISPLAY" +# endif +#endif + +bool KUniqueApplication::s_nofork = false; +bool KUniqueApplication::s_multipleInstances = false; +bool KUniqueApplication::s_uniqueTestDone = false; +bool KUniqueApplication::s_handleAutoStarted = false; + +static KCmdLineOptions kunique_options[] = +{ + { "nofork", "Don't run in the background.", 0 }, + KCmdLineLastOption +}; + +struct DCOPRequest { + QCString fun; + QByteArray data; + DCOPClientTransaction *transaction; +}; + +class KUniqueApplicationPrivate { +public: + QPtrList <DCOPRequest> requestList; + bool processingRequest; + bool firstInstance; +}; + +void +KUniqueApplication::addCmdLineOptions() +{ + KCmdLineArgs::addCmdLineOptions(kunique_options, 0, "kuniqueapp", "kde" ); +} + +bool +KUniqueApplication::start() +{ + if( s_uniqueTestDone ) + return true; + s_uniqueTestDone = true; + addCmdLineOptions(); // Make sure to add cmd line options +#ifdef Q_WS_WIN + s_nofork = true; +#else + KCmdLineArgs *args = KCmdLineArgs::parsedArgs("kuniqueapp"); + s_nofork = !args->isSet("fork"); + delete args; +#endif + + QCString appName = KCmdLineArgs::about->appName(); + + if (s_nofork) + { + if (s_multipleInstances) + { + QCString pid; + pid.setNum(getpid()); + appName = appName + "-" + pid; + } + + // Check to make sure that we're actually able to register with the DCOP + // server. + +#ifndef Q_WS_WIN //TODO + if(dcopClient()->registerAs(appName, false).isEmpty()) { + startKdeinit(); + if(dcopClient()->registerAs(appName, false).isEmpty()) { + kdError() << "KUniqueApplication: Can't setup DCOP communication." << endl; + ::exit(255); + } + } +#endif + + // We'll call newInstance in the constructor. Do nothing here. + return true; + } + DCOPClient *dc; + int fd[2]; + signed char result; + if (0 > pipe(fd)) + { + kdError() << "KUniqueApplication: pipe() failed!" << endl; + ::exit(255); + } + int fork_result = fork(); + switch(fork_result) { + case -1: + kdError() << "KUniqueApplication: fork() failed!" << endl; + ::exit(255); + break; + case 0: + // Child + ::close(fd[0]); + if (s_multipleInstances) + appName.append("-").append(QCString().setNum(getpid())); + dc = dcopClient(); + { + QCString regName = dc->registerAs(appName, false); + if (regName.isEmpty()) + { + // Check DISPLAY + if (QCString(getenv(DISPLAY)).isEmpty()) + { + kdError() << "KUniqueApplication: Can't determine DISPLAY. Aborting." << endl; + result = -1; // Error + ::write(fd[1], &result, 1); + ::exit(255); + } + + // Try to launch kdeinit. + startKdeinit(); + regName = dc->registerAs(appName, false); + if (regName.isEmpty()) + { + kdError() << "KUniqueApplication: Can't setup DCOP communication." << endl; + result = -1; + delete dc; // Clean up DCOP commmunication + ::write(fd[1], &result, 1); + ::exit(255); + } + } + if (regName != appName) + { + // Already running. Ok. + result = 0; + delete dc; // Clean up DCOP commmunication + ::write(fd[1], &result, 1); + ::close(fd[1]); +#if 0 +#ifdef Q_WS_X11 + // say we're up and running ( probably no new window will appear ) + KStartupInfoId id; + if( kapp != NULL ) // KApplication constructor unsets the env. variable + id.initId( kapp->startupId()); + else + id = KStartupInfo::currentStartupIdEnv(); + if( !id.none()) + { + Display* disp = XOpenDisplay( NULL ); + if( disp != NULL ) // use extra X connection + { + KStartupInfo::sendFinishX( disp, id ); + XCloseDisplay( disp ); + } + } +#else //FIXME(E): implement +#endif +#endif + return false; + } + dc->setPriorityCall(true); + } + + { +#ifdef Q_WS_X11 + KStartupInfoId id; + if( kapp != NULL ) // KApplication constructor unsets the env. variable + id.initId( kapp->startupId()); + else + id = KStartupInfo::currentStartupIdEnv(); + if( !id.none()) + { // notice about pid change + Display* disp = XOpenDisplay( NULL ); + if( disp != NULL ) // use extra X connection + { + KStartupInfoData data; + data.addPid( getpid()); + KStartupInfo::sendChangeX( disp, id, data ); + XCloseDisplay( disp ); + } + } +#else //FIXME(E): Implement +#endif + } + result = 0; + ::write(fd[1], &result, 1); + ::close(fd[1]); + return true; // Finished. + default: + // Parent +// DCOPClient::emergencyClose(); +// dcopClient()->detach(); + if (s_multipleInstances) + appName.append("-").append(QCString().setNum(fork_result)); + ::close(fd[1]); + for(;;) + { + int n = ::read(fd[0], &result, 1); + if (n == 1) break; + if (n == 0) + { + kdError() << "KUniqueApplication: Pipe closed unexpectedly." << endl; + ::exit(255); + } + if (errno != EINTR) + { + kdError() << "KUniqueApplication: Error reading from pipe." << endl; + ::exit(255); + } + } + ::close(fd[0]); + + if (result != 0) + ::exit(result); // Error occurred in child. + + dc = new DCOPClient(); + if (!dc->attach()) + { + kdError() << "KUniqueApplication: Parent process can't attach to DCOP." << endl; + delete dc; // Clean up DCOP commmunication + ::exit(255); + } + if (!dc->isApplicationRegistered(appName)) { + kdError() << "KUniqueApplication: Registering failed!" << endl; + } + + QCString new_asn_id; +#if defined Q_WS_X11 + KStartupInfoId id; + if( kapp != NULL ) // KApplication constructor unsets the env. variable + id.initId( kapp->startupId()); + else + id = KStartupInfo::currentStartupIdEnv(); + if( !id.none()) + new_asn_id = id.id(); +#endif + + QByteArray data, reply; + QDataStream ds(data, IO_WriteOnly); + + KCmdLineArgs::saveAppArgs(ds); + ds << new_asn_id; + + dc->setPriorityCall(true); + QCString replyType; + if (!dc->call(appName, KCmdLineArgs::about->appName(), "newInstance()", data, replyType, reply)) + { + kdError() << "Communication problem with " << KCmdLineArgs::about->appName() << ", it probably crashed." << endl; + delete dc; // Clean up DCOP commmunication + ::exit(255); + } + dc->setPriorityCall(false); + if (replyType != "int") + { + kdError() << "KUniqueApplication: DCOP communication error!" << endl; + delete dc; // Clean up DCOP commmunication + ::exit(255); + } + QDataStream rs(reply, IO_ReadOnly); + int exitCode; + rs >> exitCode; + delete dc; // Clean up DCOP commmunication + ::exit(exitCode); + break; + } + return false; // make insure++ happy +} + + +KUniqueApplication::KUniqueApplication(bool allowStyles, bool GUIenabled, bool configUnique) + : KApplication( allowStyles, GUIenabled, initHack( configUnique )), + DCOPObject(KCmdLineArgs::about->appName()) +{ + d = new KUniqueApplicationPrivate; + d->processingRequest = false; + d->firstInstance = true; + + if (s_nofork) + // Can't call newInstance directly from the constructor since it's virtual... + QTimer::singleShot( 0, this, SLOT(newInstanceNoFork()) ); +} + + +#ifdef Q_WS_X11 +KUniqueApplication::KUniqueApplication(Display *display, Qt::HANDLE visual, + Qt::HANDLE colormap, bool allowStyles, bool configUnique) + : KApplication( display, visual, colormap, allowStyles, initHack( configUnique )), + DCOPObject(KCmdLineArgs::about->appName()) +{ + d = new KUniqueApplicationPrivate; + d->processingRequest = false; + d->firstInstance = true; + + if (s_nofork) + // Can't call newInstance directly from the constructor since it's virtual... + QTimer::singleShot( 0, this, SLOT(newInstanceNoFork()) ); +} +#endif + + +KUniqueApplication::~KUniqueApplication() +{ + delete d; +} + +// this gets called before even entering QApplication::QApplication() +KInstance* KUniqueApplication::initHack( bool configUnique ) +{ + KInstance* inst = new KInstance( KCmdLineArgs::about ); + if (configUnique) + { + KConfigGroupSaver saver( inst->config(), "KDE" ); + s_multipleInstances = inst->config()->readBoolEntry("MultipleInstances", false); + } + if( !start()) + // Already running + ::exit( 0 ); + return inst; +} + +void KUniqueApplication::newInstanceNoFork() +{ + if (dcopClient()->isSuspended()) + { + // Try again later. + QTimer::singleShot( 200, this, SLOT(newInstanceNoFork()) ); + return; + } + + s_handleAutoStarted = false; + newInstance(); + d->firstInstance = false; +#if defined Q_WS_X11 + // KDE4 remove + // A hack to make startup notification stop for apps which override newInstance() + // and reuse an already existing window there, but use KWin::activateWindow() + // instead of KStartupInfo::setNewStartupId(). Therefore KWin::activateWindow() + // for now sets this flag. Automatically ending startup notification always + // would cause problem if the new window would show up with a small delay. + if( s_handleAutoStarted ) + KStartupInfo::handleAutoAppStartedSending(); +#endif + // What to do with the return value ? +} + +bool KUniqueApplication::process(const QCString &fun, const QByteArray &data, + QCString &replyType, QByteArray &replyData) +{ + if (fun == "newInstance()") + { + delayRequest(fun, data); + return true; + } else + return DCOPObject::process(fun, data, replyType, replyData); +} + +void +KUniqueApplication::delayRequest(const QCString &fun, const QByteArray &data) +{ + DCOPRequest *request = new DCOPRequest; + request->fun = fun; + request->data = data; + request->transaction = dcopClient()->beginTransaction(); + d->requestList.append(request); + if (!d->processingRequest) + { + QTimer::singleShot(0, this, SLOT(processDelayed())); + } +} + +void +KUniqueApplication::processDelayed() +{ + if (dcopClient()->isSuspended()) + { + // Try again later. + QTimer::singleShot( 200, this, SLOT(processDelayed())); + return; + } + d->processingRequest = true; + while( !d->requestList.isEmpty() ) + { + DCOPRequest *request = d->requestList.take(0); + QByteArray replyData; + QCString replyType; + if (request->fun == "newInstance()") { + dcopClient()->setPriorityCall(false); + QDataStream ds(request->data, IO_ReadOnly); + KCmdLineArgs::loadAppArgs(ds); + if( !ds.atEnd()) // backwards compatibility + { + QCString asn_id; + ds >> asn_id; + setStartupId( asn_id ); + } + s_handleAutoStarted = false; + int exitCode = newInstance(); + d->firstInstance = false; +#if defined Q_WS_X11 + if( s_handleAutoStarted ) + KStartupInfo::handleAutoAppStartedSending(); // KDE4 remove? +#endif + QDataStream rs(replyData, IO_WriteOnly); + rs << exitCode; + replyType = "int"; + } + dcopClient()->endTransaction( request->transaction, replyType, replyData); + delete request; + } + + d->processingRequest = false; +} + +bool KUniqueApplication::restoringSession() +{ + return d->firstInstance && isRestored(); +} + +int KUniqueApplication::newInstance() +{ + if (!d->firstInstance) + { + + if ( mainWidget() ) + { + mainWidget()->show(); +#if defined Q_WS_X11 + // This is the line that handles window activation if necessary, + // and what's important, it does it properly. If you reimplement newInstance(), + // and don't call the inherited one, use this (but NOT when newInstance() + // is called for the first time, like here). + KStartupInfo::setNewStartupId( mainWidget(), kapp->startupId()); +#endif + } + } + return 0; // do nothing in default implementation +} + +void KUniqueApplication::setHandleAutoStarted() +{ + s_handleAutoStarted = false; +} + +void KUniqueApplication::virtual_hook( int id, void* data ) +{ KApplication::virtual_hook( id, data ); + DCOPObject::virtual_hook( id, data ); } + +#include "kuniqueapplication.moc" |