plasma-framework/abstractrunner.cpp

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/*
* Copyright 2006-2007 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 "abstractrunner.h"
#include <QMutex>
#include <QMutexLocker>
#include <KDebug>
#include <KPluginInfo>
#include <KServiceTypeTrader>
#include <QTimer>
#include "scripting/runnerscript.h"
#include "searchcontext.h"
namespace Plasma
{
class AbstractRunner::Private
{
public:
bool hasMatchOptions;
bool hasConfig;
Priority priority;
Speed speed;
RunnerScript* script;
KPluginInfo runnerDescription;
AbstractRunner* runner;
QTime runtime;
int fastRuns;
Private(AbstractRunner* r, KService::Ptr service)
: priority(NormalPriority),
speed(NormalSpeed),
script(0),
runnerDescription(service),
runner(r),
fastRuns(0)
{
if (runnerDescription.isValid()) {
QString language = runnerDescription.property("X-Plasma-Language").toString();
if (!language.isEmpty()) {
script = Plasma::loadScriptEngine(language, runner);
if (!script) {
kDebug() << "Could not create a" << language << "ScriptEngine for the"
<< runnerDescription.name() << "Runner.";
} else {
QTimer::singleShot(0, runner, SLOT(init()));
}
}
}
}
static QMutex bigLock;
};
QMutex AbstractRunner::Private::bigLock;
AbstractRunner::AbstractRunner(QObject* parent, const QString& serviceId)
: QObject(parent),
d(new Private(this, KService::serviceByStorageId(serviceId)))
{
}
AbstractRunner::AbstractRunner(QObject* parent, const QVariantList& args)
: QObject(parent),
d(new Private(this, KService::serviceByStorageId(args.count() > 0 ? args[0].toString() : QString())))
{
}
AbstractRunner::~AbstractRunner()
{
delete d;
}
KConfigGroup AbstractRunner::config() const
{
QString group = objectName();
if (group.isEmpty()) {
group = "UnnamedRunner";
}
KConfigGroup runners(KGlobal::config(), "Runners");
return KConfigGroup(&runners, group);
}
void AbstractRunner::performMatch( Plasma::SearchContext &globalContext )
{
static const int reasonableRunTime = 1500;
static const int fastEnoughTime = 250;
d->runtime.restart();
SearchContext localContext(0, globalContext);
match(&localContext);
// automatically rate limit runners that become slooow
const int runtime = d->runtime.elapsed();
bool slowed = speed() == SlowSpeed;
if (!slowed && runtime > reasonableRunTime) {
// we punish runners that return too slowly, even if they don't bring
// back matches
kDebug() << runnerName() << "runner is too slow, putting it on the back burner.";
d->fastRuns = 0;
setSpeed(SlowSpeed);
}
//If matches were not added, delete items on the heap
if (localContext.addMatchesTo(globalContext) &&
slowed && runtime < fastEnoughTime) {
++d->fastRuns;
if (d->fastRuns > 2) {
// we reward slowed runners who bring back matches fast enough
// 3 times in a row
kDebug() << runnerName() << "runner is faster than we thought, kicking it up a notch";
setSpeed(NormalSpeed);
}
}
}
bool AbstractRunner::hasMatchOptions()
{
return d->hasMatchOptions;
}
void AbstractRunner::setHasMatchOptions(bool hasMatchOptions)
{
d->hasMatchOptions = hasMatchOptions;
}
void AbstractRunner::createMatchOptions(QWidget *parent)
{
Q_UNUSED(parent)
}
bool AbstractRunner::isConfigurable()
{
return d->hasConfig;
}
void AbstractRunner::setIsConfigurable(bool hasConfig)
{
d->hasConfig = hasConfig;
}
void AbstractRunner::createConfigurationInterface(QWidget *widget)
{
Q_UNUSED(widget)
}
AbstractRunner::Speed AbstractRunner::speed() const
{
return d->speed;
}
void AbstractRunner::setSpeed(Speed speed)
{
d->speed = speed;
}
AbstractRunner::Priority AbstractRunner::priority() const
{
return d->priority;
}
void AbstractRunner::setPriority(Priority priority)
{
d->priority = priority;
}
KService::List AbstractRunner::serviceQuery(const QString &serviceType, const QString &constraint) const
{
QMutexLocker lock(&Private::bigLock);
return KServiceTypeTrader::self()->query(serviceType, constraint);
}
const QMutex& AbstractRunner::bigLock() const
{
return Private::bigLock;
}
void AbstractRunner::exec(Plasma::SearchMatch *action)
{
if (d->script) {
return d->script->exec(action);
}
}
void AbstractRunner::match(Plasma::SearchContext *search)
{
if (d->script) {
return d->script->match(search);
}
}
QString AbstractRunner::runnerName() const
{
if (!d->runnerDescription.isValid()) {
return objectName();
}
return d->runnerDescription.property("X-Plasma-RunnerName").toString();
}
void AbstractRunner::init()
{
if (d->script) {
d->script->init();
}
}
AbstractRunner::List AbstractRunner::loadRunners(QObject* parent, const QStringList& whitelist)
{
List firstRunners;
List runners;
List lastRunners;
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Runner");
QString error;
foreach (KService::Ptr service, offers) {
if (whitelist.empty() || whitelist.contains(service->name())) {
QString language = service->property("X-Plasma-Language").toString();
AbstractRunner* runner = 0;
if (language.isEmpty()) {
QVariantList args;
args << service->storageId();
runner = service->createInstance<AbstractRunner>(parent, args, &error);
} else {
runner = new AbstractRunner(parent, service->storageId());
}
if (runner) {
//kDebug() << "loaded runner : " << service->name();
QString phase = service->property("X-Plasma-RunnerPhase").toString();
if (phase == "last") {
lastRunners.append(runner);
} else if (phase == "first") {
firstRunners.append(runner);
} else {
runners.append(runner);
}
} else {
kDebug() << "failed to load runner : " << service->name() << ". error reported: " << error;
}
}
}
firstRunners << runners << lastRunners;
return firstRunners;
}
} // Plasma namespace
#include "abstractrunner.moc"