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kwin/sm.cpp
Martin Gräßlin a394fade64 Remove Tiling support from KWin 
As discussed on the mailinglist [1] the tiling support is
removed from KWin. The main reasons for this step are:
* it is unmaintained
* it is a mode not used by any of the core KWin team
* original developer said at Akademy 2012 that he is not
  interested in picking up the work again
* tiling has quite some bugs, e.g. multi screen not supported
* is conflicting with other concepts in KWin, e.g. activities

There is ongoing work to get tiling supported through a KWin
script, which is a preferred way as it does not influence the
existing C++ code base.

[1] http://lists.kde.org/?l=kwin&m=133149673110558&w=2
BUG: 303090
FIXED-IN: 4.10
REVIEW: 105546
2012-07-14 11:18:06 +02:00

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "sm.h"
#include <unistd.h>
#include <stdlib.h>
#include <pwd.h>
#include <fixx11h.h>
#include <kconfig.h>
#include <kglobal.h>
#include "workspace.h"
#include "client.h"
#include <QDBusInterface>
#include <QDBusPendingCall>
#include <QSocketNotifier>
#include <QSessionManager>
#include <kdebug.h>
namespace KWin
{
bool SessionManager::saveState(QSessionManager& sm)
{
// If the session manager is ksmserver, save stacking
// order, active window, active desktop etc. in phase 1,
// as ksmserver assures no interaction will be done
// before the WM finishes phase 1. Saving in phase 2 is
// too late, as possible user interaction may change some things.
// Phase2 is still needed though (ICCCM 5.2)
char* sm_vendor = SmcVendor(static_cast< SmcConn >(sm.handle()));
bool ksmserver = qstrcmp(sm_vendor, "KDE") == 0;
free(sm_vendor);
if (!sm.isPhase2()) {
Workspace::self()->sessionSaveStarted();
if (ksmserver) // save stacking order etc. before "save file?" etc. dialogs change it
Workspace::self()->storeSession(kapp->sessionConfig(), SMSavePhase0);
sm.release(); // Qt doesn't automatically release in this case (bug?)
sm.requestPhase2();
return true;
}
Workspace::self()->storeSession(kapp->sessionConfig(), ksmserver ? SMSavePhase2 : SMSavePhase2Full);
kapp->sessionConfig()->sync();
return true;
}
// I bet this is broken, just like everywhere else in KDE
bool SessionManager::commitData(QSessionManager& sm)
{
if (!sm.isPhase2())
Workspace::self()->sessionSaveStarted();
return true;
}
// Workspace
/*!
Stores the current session in the config file
\sa loadSessionInfo()
*/
void Workspace::storeSession(KConfig* config, SMSavePhase phase)
{
KConfigGroup cg(config, "Session");
int count = 0;
int active_client = -1;
for (ClientList::Iterator it = clients.begin(); it != clients.end(); ++it) {
Client* c = (*it);
QByteArray sessionId = c->sessionId();
QByteArray wmCommand = c->wmCommand();
if (sessionId.isEmpty())
// remember also applications that are not XSMP capable
// and use the obsolete WM_COMMAND / WM_SAVE_YOURSELF
if (wmCommand.isEmpty())
continue;
count++;
if (c->isActive())
active_client = count;
if (phase == SMSavePhase2 || phase == SMSavePhase2Full)
storeClient(cg, count, c);
}
if (phase == SMSavePhase0) {
// it would be much simpler to save these values to the config file,
// but both Qt and KDE treat phase1 and phase2 separately,
// which results in different sessionkey and different config file :(
session_active_client = active_client;
session_desktop = currentDesktop();
} else if (phase == SMSavePhase2) {
cg.writeEntry("count", count);
cg.writeEntry("active", session_active_client);
cg.writeEntry("desktop", session_desktop);
} else { // SMSavePhase2Full
cg.writeEntry("count", count);
cg.writeEntry("active", session_active_client);
cg.writeEntry("desktop", currentDesktop());
}
}
void Workspace::storeClient(KConfigGroup &cg, int num, Client *c)
{
c->setSessionInteract(false); //make sure we get the real values
QString n = QString::number(num);
cg.writeEntry(QString("sessionId") + n, c->sessionId().constData());
cg.writeEntry(QString("windowRole") + n, c->windowRole().constData());
cg.writeEntry(QString("wmCommand") + n, c->wmCommand().constData());
cg.writeEntry(QString("wmClientMachine") + n, c->wmClientMachine(true).constData());
cg.writeEntry(QString("resourceName") + n, c->resourceName().constData());
cg.writeEntry(QString("resourceClass") + n, c->resourceClass().constData());
cg.writeEntry(QString("geometry") + n, QRect(c->calculateGravitation(true), c->clientSize())); // FRAME
cg.writeEntry(QString("restore") + n, c->geometryRestore());
cg.writeEntry(QString("fsrestore") + n, c->geometryFSRestore());
cg.writeEntry(QString("maximize") + n, (int) c->maximizeMode());
cg.writeEntry(QString("fullscreen") + n, (int) c->fullScreenMode());
cg.writeEntry(QString("desktop") + n, c->desktop());
// the config entry is called "iconified" for back. comp. reasons
// (kconf_update script for updating session files would be too complicated)
cg.writeEntry(QString("iconified") + n, c->isMinimized());
cg.writeEntry(QString("opacity") + n, c->opacity());
// the config entry is called "sticky" for back. comp. reasons
cg.writeEntry(QString("sticky") + n, c->isOnAllDesktops());
cg.writeEntry(QString("shaded") + n, c->isShade());
// the config entry is called "staysOnTop" for back. comp. reasons
cg.writeEntry(QString("staysOnTop") + n, c->keepAbove());
cg.writeEntry(QString("keepBelow") + n, c->keepBelow());
cg.writeEntry(QString("skipTaskbar") + n, c->skipTaskbar(true));
cg.writeEntry(QString("skipPager") + n, c->skipPager());
cg.writeEntry(QString("skipSwitcher") + n, c->skipSwitcher());
// not really just set by user, but name kept for back. comp. reasons
cg.writeEntry(QString("userNoBorder") + n, c->noBorder());
cg.writeEntry(QString("windowType") + n, windowTypeToTxt(c->windowType()));
cg.writeEntry(QString("shortcut") + n, c->shortcut().toString());
cg.writeEntry(QString("stackingOrder") + n, unconstrained_stacking_order.indexOf(c));
// KConfig doesn't support long so we need to live with less precision on 64-bit systems
cg.writeEntry(QString("tabGroup") + n, static_cast<int>(reinterpret_cast<long>(c->tabGroup())));
cg.writeEntry(QString("activities") + n, c->activities());
}
void Workspace::storeSubSession(const QString &name, QSet<QByteArray> sessionIds)
{
//TODO clear it first
KConfigGroup cg(KGlobal::config(), QString("SubSession: ") + name);
int count = 0;
int active_client = -1;
for (ClientList::Iterator it = clients.begin(); it != clients.end(); ++it) {
Client* c = (*it);
QByteArray sessionId = c->sessionId();
QByteArray wmCommand = c->wmCommand();
if (sessionId.isEmpty())
// remember also applications that are not XSMP capable
// and use the obsolete WM_COMMAND / WM_SAVE_YOURSELF
if (wmCommand.isEmpty())
continue;
if (!sessionIds.contains(sessionId))
continue;
kDebug() << "storing" << sessionId;
count++;
if (c->isActive())
active_client = count;
storeClient(cg, count, c);
}
cg.writeEntry("count", count);
cg.writeEntry("active", active_client);
//cg.writeEntry( "desktop", currentDesktop());
}
bool Workspace::stopActivity(const QString &id)
{
if (sessionSaving()) {
return false; //ksmserver doesn't queue requests (yet)
//FIXME what about session *loading*?
}
//ugly hack to avoid dbus deadlocks
#ifdef KWIN_BUILD_ACTIVITIES
updateActivityList(true, false);
#endif
QMetaObject::invokeMethod(this, "reallyStopActivity", Qt::QueuedConnection, Q_ARG(QString, id));
//then lie and assume it worked.
return true;
}
void Workspace::reallyStopActivity(const QString &id)
{
if (sessionSaving())
return; //ksmserver doesn't queue requests (yet)
kDebug() << id;
QSet<QByteArray> saveSessionIds;
QSet<QByteArray> dontCloseSessionIds;
for (ClientList::const_iterator it = clients.constBegin(); it != clients.constEnd(); ++it) {
const Client* c = (*it);
const QByteArray sessionId = c->sessionId();
if (sessionId.isEmpty()) {
continue; //TODO support old wm_command apps too?
}
//kDebug() << sessionId;
//if it's on the activity that's closing, it needs saving
//but if a process is on some other open activity, I don't wanna close it yet
//this is, of course, complicated by a process having many windows.
if (c->isOnAllActivities()) {
dontCloseSessionIds << sessionId;
continue;
}
const QStringList activities = c->activities();
foreach (const QString & activityId, activities) {
if (activityId == id) {
saveSessionIds << sessionId;
} else if (openActivities_.contains(activityId)) {
dontCloseSessionIds << sessionId;
}
}
}
storeSubSession(id, saveSessionIds);
QStringList saveAndClose;
QStringList saveOnly;
foreach (const QByteArray & sessionId, saveSessionIds) {
if (dontCloseSessionIds.contains(sessionId)) {
saveOnly << sessionId;
} else {
saveAndClose << sessionId;
}
}
kDebug() << "saveActivity" << id << saveAndClose << saveOnly;
//pass off to ksmserver
QDBusInterface ksmserver("org.kde.ksmserver", "/KSMServer", "org.kde.KSMServerInterface");
if (ksmserver.isValid()) {
ksmserver.asyncCall("saveSubSession", id, saveAndClose, saveOnly);
} else {
kDebug() << "couldn't get ksmserver interface";
}
}
/*!
Loads the session information from the config file.
\sa storeSession()
*/
void Workspace::loadSessionInfo()
{
session.clear();
KConfigGroup cg(kapp->sessionConfig(), "Session");
addSessionInfo(cg);
}
void Workspace::addSessionInfo(KConfigGroup &cg)
{
int count = cg.readEntry("count", 0);
int active_client = cg.readEntry("active", 0);
for (int i = 1; i <= count; i++) {
QString n = QString::number(i);
SessionInfo* info = new SessionInfo;
session.append(info);
info->sessionId = cg.readEntry(QString("sessionId") + n, QString()).toLatin1();
info->windowRole = cg.readEntry(QString("windowRole") + n, QString()).toLatin1();
info->wmCommand = cg.readEntry(QString("wmCommand") + n, QString()).toLatin1();
info->wmClientMachine = cg.readEntry(QString("wmClientMachine") + n, QString()).toLatin1();
info->resourceName = cg.readEntry(QString("resourceName") + n, QString()).toLatin1();
info->resourceClass = cg.readEntry(QString("resourceClass") + n, QString()).toLower().toLatin1();
info->geometry = cg.readEntry(QString("geometry") + n, QRect());
info->restore = cg.readEntry(QString("restore") + n, QRect());
info->fsrestore = cg.readEntry(QString("fsrestore") + n, QRect());
info->maximized = cg.readEntry(QString("maximize") + n, 0);
info->fullscreen = cg.readEntry(QString("fullscreen") + n, 0);
info->desktop = cg.readEntry(QString("desktop") + n, 0);
info->minimized = cg.readEntry(QString("iconified") + n, false);
info->opacity = cg.readEntry(QString("opacity") + n, 1.0);
info->onAllDesktops = cg.readEntry(QString("sticky") + n, false);
info->shaded = cg.readEntry(QString("shaded") + n, false);
info->keepAbove = cg.readEntry(QString("staysOnTop") + n, false);
info->keepBelow = cg.readEntry(QString("keepBelow") + n, false);
info->skipTaskbar = cg.readEntry(QString("skipTaskbar") + n, false);
info->skipPager = cg.readEntry(QString("skipPager") + n, false);
info->skipSwitcher = cg.readEntry(QString("skipSwitcher") + n, false);
info->noBorder = cg.readEntry(QString("userNoBorder") + n, false);
info->windowType = txtToWindowType(cg.readEntry(QString("windowType") + n, QString()).toLatin1());
info->shortcut = cg.readEntry(QString("shortcut") + n, QString());
info->active = (active_client == i);
info->stackingOrder = cg.readEntry(QString("stackingOrder") + n, -1);
info->tabGroup = cg.readEntry(QString("tabGroup") + n, 0);
info->tabGroupClient = NULL;
info->activities = cg.readEntry(QString("activities") + n, QStringList());
}
}
void Workspace::loadSubSessionInfo(const QString &name)
{
KConfigGroup cg(KGlobal::config(), QString("SubSession: ") + name);
addSessionInfo(cg);
}
bool Workspace::startActivity(const QString &id)
{
if (sessionSaving()) {
return false; //ksmserver doesn't queue requests (yet)
}
if (!allActivities_.contains(id)) {
return false; //bogus id
}
loadSubSessionInfo(id);
QDBusInterface ksmserver("org.kde.ksmserver", "/KSMServer", "org.kde.KSMServerInterface");
if (ksmserver.isValid()) {
ksmserver.asyncCall("restoreSubSession", id);
} else {
kDebug() << "couldn't get ksmserver interface";
return false;
}
return true;
}
/*!
Returns a SessionInfo for client \a c. The returned session
info is removed from the storage. It's up to the caller to delete it.
This function is called when a new window is mapped and must be managed.
We try to find a matching entry in the session.
May return 0 if there's no session info for the client.
*/
SessionInfo* Workspace::takeSessionInfo(Client* c)
{
SessionInfo *realInfo = 0;
QByteArray sessionId = c->sessionId();
QByteArray windowRole = c->windowRole();
QByteArray wmCommand = c->wmCommand();
QByteArray wmClientMachine = c->wmClientMachine(true);
QByteArray resourceName = c->resourceName();
QByteArray resourceClass = c->resourceClass();
// First search ``session''
if (! sessionId.isEmpty()) {
// look for a real session managed client (algorithm suggested by ICCCM)
foreach (SessionInfo * info, session) {
if (realInfo)
break;
if (info->sessionId == sessionId && sessionInfoWindowTypeMatch(c, info)) {
if (! windowRole.isEmpty()) {
if (info->windowRole == windowRole) {
realInfo = info;
session.removeAll(info);
}
} else {
if (info->windowRole.isEmpty()
&& info->resourceName == resourceName
&& info->resourceClass == resourceClass) {
realInfo = info;
session.removeAll(info);
}
}
}
}
} else {
// look for a sessioninfo with matching features.
foreach (SessionInfo * info, session) {
if (realInfo)
break;
if (info->resourceName == resourceName
&& info->resourceClass == resourceClass
&& info->wmClientMachine == wmClientMachine
&& sessionInfoWindowTypeMatch(c, info)) {
if (wmCommand.isEmpty() || info->wmCommand == wmCommand) {
realInfo = info;
session.removeAll(info);
}
}
}
}
// Set tabGroupClient for other clients in the same group
if (realInfo && realInfo->tabGroup) {
foreach (SessionInfo * info, session) {
if (!info->tabGroupClient && info->tabGroup == realInfo->tabGroup)
info->tabGroupClient = c;
}
}
return realInfo;
}
bool Workspace::sessionInfoWindowTypeMatch(Client* c, SessionInfo* info)
{
if (info->windowType == -2) {
// undefined (not really part of NET::WindowType)
return !c->isSpecialWindow();
}
return info->windowType == c->windowType();
}
static const char* const window_type_names[] = {
"Unknown", "Normal" , "Desktop", "Dock", "Toolbar", "Menu", "Dialog",
"Override", "TopMenu", "Utility", "Splash"
};
// change also the two functions below when adding new entries
const char* Workspace::windowTypeToTxt(NET::WindowType type)
{
if (type >= NET::Unknown && type <= NET::Splash)
return window_type_names[ type + 1 ]; // +1 (unknown==-1)
if (type == -2) // undefined (not really part of NET::WindowType)
return "Undefined";
kFatal(1212) << "Unknown Window Type" ;
return NULL;
}
NET::WindowType Workspace::txtToWindowType(const char* txt)
{
for (int i = NET::Unknown;
i <= NET::Splash;
++i)
if (qstrcmp(txt, window_type_names[ i + 1 ]) == 0) // +1
return static_cast< NET::WindowType >(i);
return static_cast< NET::WindowType >(-2); // undefined
}
// KWin's focus stealing prevention causes problems with user interaction
// during session save, as it prevents possible dialogs from getting focus.
// Therefore it's temporarily disabled during session saving. Start of
// session saving can be detected in SessionManager::saveState() above,
// but Qt doesn't have API for saying when session saved finished (either
// successfully, or was canceled). Therefore, create another connection
// to session manager, that will provide this information.
// Similarly the remember feature of window-specific settings should be disabled
// during KDE shutdown when windows may move e.g. because of Kicker going away
// (struts changing). When session saving starts, it can be cancelled, in which
// case the shutdown_cancelled callback is invoked, or it's a checkpoint that
// is immediatelly followed by save_complete, or finally it's a shutdown that
// is immediatelly followed by die callback. So getting save_yourself with shutdown
// set disables window-specific settings remembering, getting shutdown_cancelled
// re-enables, otherwise KWin will go away after die.
static void save_yourself(SmcConn conn_P, SmPointer ptr, int, Bool shutdown, int, Bool)
{
SessionSaveDoneHelper* session = reinterpret_cast< SessionSaveDoneHelper* >(ptr);
if (conn_P != session->connection())
return;
if (shutdown)
Workspace::self()->disableRulesUpdates(true);
SmcSaveYourselfDone(conn_P, True);
}
static void die(SmcConn conn_P, SmPointer ptr)
{
SessionSaveDoneHelper* session = reinterpret_cast< SessionSaveDoneHelper* >(ptr);
if (conn_P != session->connection())
return;
// session->saveDone(); we will quit anyway
session->close();
}
static void save_complete(SmcConn conn_P, SmPointer ptr)
{
SessionSaveDoneHelper* session = reinterpret_cast< SessionSaveDoneHelper* >(ptr);
if (conn_P != session->connection())
return;
session->saveDone();
}
static void shutdown_cancelled(SmcConn conn_P, SmPointer ptr)
{
SessionSaveDoneHelper* session = reinterpret_cast< SessionSaveDoneHelper* >(ptr);
if (conn_P != session->connection())
return;
Workspace::self()->disableRulesUpdates(false); // re-enable
// no need to differentiate between successful finish and cancel
session->saveDone();
}
void SessionSaveDoneHelper::saveDone()
{
Workspace::self()->sessionSaveDone();
}
SessionSaveDoneHelper::SessionSaveDoneHelper()
{
SmcCallbacks calls;
calls.save_yourself.callback = save_yourself;
calls.save_yourself.client_data = reinterpret_cast< SmPointer >(this);
calls.die.callback = die;
calls.die.client_data = reinterpret_cast< SmPointer >(this);
calls.save_complete.callback = save_complete;
calls.save_complete.client_data = reinterpret_cast< SmPointer >(this);
calls.shutdown_cancelled.callback = shutdown_cancelled;
calls.shutdown_cancelled.client_data = reinterpret_cast< SmPointer >(this);
char* id = NULL;
char err[ 11 ];
conn = SmcOpenConnection(NULL, 0, 1, 0,
SmcSaveYourselfProcMask | SmcDieProcMask | SmcSaveCompleteProcMask
| SmcShutdownCancelledProcMask, &calls, NULL, &id, 10, err);
if (id != NULL)
free(id);
if (conn == NULL)
return; // no SM
// set the required properties, mostly dummy values
SmPropValue propvalue[ 5 ];
SmProp props[ 5 ];
propvalue[ 0 ].length = sizeof(unsigned char);
unsigned char value0 = SmRestartNever; // so that this extra SM connection doesn't interfere
propvalue[ 0 ].value = &value0;
props[ 0 ].name = const_cast< char* >(SmRestartStyleHint);
props[ 0 ].type = const_cast< char* >(SmCARD8);
props[ 0 ].num_vals = 1;
props[ 0 ].vals = &propvalue[ 0 ];
struct passwd* entry = getpwuid(geteuid());
propvalue[ 1 ].length = entry != NULL ? strlen(entry->pw_name) : 0;
propvalue[ 1 ].value = (SmPointer)(entry != NULL ? entry->pw_name : "");
props[ 1 ].name = const_cast< char* >(SmUserID);
props[ 1 ].type = const_cast< char* >(SmARRAY8);
props[ 1 ].num_vals = 1;
props[ 1 ].vals = &propvalue[ 1 ];
propvalue[ 2 ].length = 0;
propvalue[ 2 ].value = (SmPointer)("");
props[ 2 ].name = const_cast< char* >(SmRestartCommand);
props[ 2 ].type = const_cast< char* >(SmLISTofARRAY8);
props[ 2 ].num_vals = 1;
props[ 2 ].vals = &propvalue[ 2 ];
propvalue[ 3 ].length = strlen("kwinsmhelper");
propvalue[ 3 ].value = (SmPointer)"kwinsmhelper";
props[ 3 ].name = const_cast< char* >(SmProgram);
props[ 3 ].type = const_cast< char* >(SmARRAY8);
props[ 3 ].num_vals = 1;
props[ 3 ].vals = &propvalue[ 3 ];
propvalue[ 4 ].length = 0;
propvalue[ 4 ].value = (SmPointer)("");
props[ 4 ].name = const_cast< char* >(SmCloneCommand);
props[ 4 ].type = const_cast< char* >(SmLISTofARRAY8);
props[ 4 ].num_vals = 1;
props[ 4 ].vals = &propvalue[ 4 ];
SmProp* p[ 5 ] = { &props[ 0 ], &props[ 1 ], &props[ 2 ], &props[ 3 ], &props[ 4 ] };
SmcSetProperties(conn, 5, p);
notifier = new QSocketNotifier(IceConnectionNumber(SmcGetIceConnection(conn)),
QSocketNotifier::Read, this);
connect(notifier, SIGNAL(activated(int)), SLOT(processData()));
}
SessionSaveDoneHelper::~SessionSaveDoneHelper()
{
close();
}
void SessionSaveDoneHelper::close()
{
if (conn != NULL) {
delete notifier;
SmcCloseConnection(conn, 0, NULL);
}
conn = NULL;
}
void SessionSaveDoneHelper::processData()
{
if (conn != NULL)
IceProcessMessages(SmcGetIceConnection(conn), 0, 0);
}
void Workspace::sessionSaveDone()
{
session_saving = false;
//remove sessionInteract flag from all clients
foreach (Client * c, clients) {
c->setSessionInteract(false);
}
}
} // namespace
#include "sm.moc"
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