plasma-framework/service.cpp

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/*
* Copyright 2008 Aaron Seigo <aseigo@kde.org>
*
* This program 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, 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 Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "service.h"
#include "private/service_p.h"
#include <QFile>
#include <QTimer>
#include <KDebug>
#include <KService>
#include <KServiceTypeTrader>
#include <KSharedConfig>
#include <KStandardDirs>
#include <KTemporaryFile>
#include "configxml.h"
#include "version.h"
namespace Plasma
{
Service::Service(QObject *parent)
: QObject(parent),
d(new ServicePrivate(this))
{
registerOperationsScheme();
}
Service::Service(QObject *parent, const QVariantList &args)
: QObject(parent),
d(new ServicePrivate(this))
{
// remove those first item since those are managed by Service and subclasses shouldn't
// need to worry about it. yes, it violates the constness of this var, but it lets us add
// or remove items later while applets can just pretend that their args always start at 0
QVariantList &mutableArgs = const_cast<QVariantList&>(args);
if (!mutableArgs.isEmpty()) {
setName(mutableArgs[0].toString());
mutableArgs.removeFirst();
}
registerOperationsScheme();
}
Service::~Service()
{
delete d;
}
Service* Service::load(const QString &name, QObject *parent)
{
//TODO: scripting API support
if (name.isEmpty()) {
return new NullService(QString(), parent);
}
QString constraint = QString("[X-KDE-PluginInfo-Name] == '%1'").arg(name);
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Service", constraint);
if (offers.isEmpty()) {
kDebug() << "offers is empty for " << name;
return new NullService(name, parent);
}
KService::Ptr offer = offers.first();
QString error;
QVariantList args;
args << name;
Service* service = 0;
if (Plasma::isPluginVersionCompatible(KPluginLoader(*offer).pluginVersion())) {
service = offer->createInstance<Plasma::Service>(parent, args, &error);
}
if (!service) {
kDebug() << "Couldn't load Service \"" << name << "\"! reason given: " << error;
return new NullService(name, parent);
}
return service;
}
void Service::setDestination(const QString &destination)
{
d->destination = destination;
}
QString Service::destination() const
{
return d->destination;
}
QStringList Service::operationNames() const
{
if (!d->config) {
kDebug() << "No valid operations scheme has been registered";
return QStringList();
}
return d->config->groupList();
}
KConfigGroup Service::operationDescription(const QString &operationName)
{
if (!d->config) {
kDebug() << "No valid operations scheme has been registered";
return KConfigGroup();
}
d->config->writeConfig();
KConfigGroup params(d->config->config(), operationName);
//kDebug() << "operation" << operationName << "requested, has keys" << params.keyList() << "from"
// << d->config->config()->name();
return params;
}
ServiceJob* Service::startOperationCall(const KConfigGroup &description, QObject *parent)
{
// TODO: nested groups?
ServiceJob *job = 0;
QString op = description.name();
if (!d->config) {
kDebug() << "No valid operations scheme has been registered";
} else {
if (d->disabledOperations.contains(op)) {
kDebug() << "Operation" << op << "is disabled";
} else {
QMap<QString, QVariant> params;
foreach (const QString &key, description.keyList()) {
KConfigSkeletonItem *item = d->config->findItem(op, key);
if (item) {
params.insert(key, description.readEntry(key, item->property()));
}
}
job = createJob(description.name(), params);
}
}
if (!job) {
job = new NullServiceJob(destination(), op, this);
}
job->setParent(parent ? parent : this);
connect(job, SIGNAL(finished(KJob*)), this, SLOT(jobFinished(KJob*)));
QTimer::singleShot(0, job, SLOT(slotStart()));
return job;
}
void Service::associateWidget(QWidget *widget, const QString &operation)
{
disassociateWidget(widget);
d->associatedWidgets.insert(widget, operation);
connect(widget, SIGNAL(destroyed(QObject*)), this, SLOT(associatedWidgetDestroyed(QObject*)));
widget->setEnabled(!d->disabledOperations.contains(operation));
}
void Service::disassociateWidget(QWidget *widget)
{
disconnect(widget, SIGNAL(destroyed(QObject*)), this, SLOT(associatedWidgetDestroyed(QObject*)));
d->associatedWidgets.remove(widget);
}
void Service::associateWidget(QGraphicsWidget *widget, const QString &operation)
{
disassociateWidget(widget);
d->associatedGraphicsWidgets.insert(widget, operation);
connect(widget, SIGNAL(destroyed(QObject*)), this, SLOT(associatedGraphicsWidgetDestroyed(QObject*)));
widget->setEnabled(!d->disabledOperations.contains(operation));
}
void Service::disassociateWidget(QGraphicsWidget *widget)
{
disconnect(widget, SIGNAL(destroyed(QObject*)), this, SLOT(associatedGraphicsWidgetDestroyed(QObject*)));
d->associatedGraphicsWidgets.remove(widget);
}
QString Service::name() const
{
return d->name;
}
void Service::setName(const QString &name)
{
d->name = name;
// now reset the config, which may be based on our name
delete d->config;
d->config = 0;
delete d->tempFile;
d->tempFile = 0;
registerOperationsScheme();
}
void Service::setOperationEnabled(const QString &operation, bool enable)
{
if (!d->config->hasGroup(operation)) {
return;
}
if (enable) {
d->disabledOperations.remove(operation);
} else if (!d->disabledOperations.contains(operation)) {
d->disabledOperations.insert(operation);
}
{
QHashIterator<QWidget *, QString> it(d->associatedWidgets);
while (it.hasNext()) {
it.next();
if (it.value() == operation) {
it.key()->setEnabled(enable);
}
}
}
{
QHashIterator<QGraphicsWidget *, QString> it(d->associatedGraphicsWidgets);
while (it.hasNext()) {
it.next();
if (it.value() == operation) {
it.key()->setEnabled(enable);
}
}
}
}
bool Service::isOperationEnabled(const QString &operation) const
{
return d->config->hasGroup(operation) && !d->disabledOperations.contains(operation);
}
void Service::setOperationsScheme(QIODevice *xml)
{
delete d->config;
delete d->tempFile;
//FIXME: make KSharedConfig and KConfigSkeleton not braindamaged in 4.2 and then get rid of the
// temp file object here
d->tempFile = new KTemporaryFile;
d->tempFile->open();
KSharedConfigPtr c = KSharedConfig::openConfig(d->tempFile->fileName(), KConfig::NoGlobals);
d->config = new ConfigXml(c, xml, this);
emit operationsChanged();
{
QHashIterator<QWidget *, QString> it(d->associatedWidgets);
while (it.hasNext()) {
it.next();
it.key()->setEnabled(d->config->hasGroup(it.value()));
}
}
{
QHashIterator<QGraphicsWidget *, QString> it(d->associatedGraphicsWidgets);
while (it.hasNext()) {
it.next();
it.key()->setEnabled(d->config->hasGroup(it.value()));
}
}
}
void Service::registerOperationsScheme()
{
if (d->config) {
// we've already done our job. let's go home.
return;
}
if (d->name.isEmpty()) {
kDebug() << "No name found";
return;
}
QString path = KStandardDirs::locate("data", "plasma/services/" + d->name + ".operations");
if (path.isEmpty()) {
kDebug() << "Cannot find operations description";
return;
}
QFile file(path);
setOperationsScheme(&file);
}
} // namespace Plasma
#include "service.moc"