plasma-framework/plasma/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 <QAction>
#include <QHash>
#include <QMenu>
#include <QMimeData>
#include <QMutex>
#include <QMutexLocker>
#include <QTimer>
#include <kdebug.h>
#include <kplugininfo.h>
#include <kservicetypetrader.h>
#include <kstandarddirs.h>
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#include <klocalizedstring.h>
#include <kiconloader.h>
#include <kglobal.h>
#include <qstandardpaths.h>
#include "package.h"
#include "pluginloader.h"
#include "private/abstractrunner_p.h"
#include "querymatch.h"
#include "runnercontext.h"
#include "scripting/runnerscript.h"
namespace Plasma
{
AbstractRunner::AbstractRunner(QObject *parent, const QString &path)
: QObject(parent),
d(new AbstractRunnerPrivate(this))
{
d->init(path);
}
AbstractRunner::AbstractRunner(const KService::Ptr service, QObject *parent)
: QObject(parent),
d(new AbstractRunnerPrivate(this))
{
d->init(service);
}
AbstractRunner::AbstractRunner(QObject *parent, const QVariantList &args)
: QObject(parent),
d(new AbstractRunnerPrivate(this))
{
if (args.count() > 0) {
KService::Ptr service = KService::serviceByStorageId(args[0].toString());
if (service) {
d->init(service);
}
}
}
AbstractRunner::~AbstractRunner()
{
delete d;
}
KConfigGroup AbstractRunner::config() const
{
QString group = id();
if (group.isEmpty()) {
group = "UnnamedRunner";
}
KConfigGroup runners(KSharedConfig::openConfig(), "Runners");
return KConfigGroup(&runners, group);
}
void AbstractRunner::reloadConfiguration()
{
if (d->script) {
emit d->script->reloadConfiguration();
}
}
void AbstractRunner::addSyntax(const RunnerSyntax &syntax)
{
d->syntaxes.append(syntax);
}
void AbstractRunner::setDefaultSyntax(const RunnerSyntax &syntax)
{
d->syntaxes.append(syntax);
d->defaultSyntax = &(d->syntaxes.last());
}
void AbstractRunner::setSyntaxes(const QList<RunnerSyntax> &syntaxes)
{
d->syntaxes = syntaxes;
}
QList<RunnerSyntax> AbstractRunner::syntaxes() const
{
return d->syntaxes;
}
RunnerSyntax *AbstractRunner::defaultSyntax() const
{
return d->defaultSyntax;
}
void AbstractRunner::performMatch(Plasma::RunnerContext &localContext)
{
static const int reasonableRunTime = 1500;
static const int fastEnoughTime = 250;
if (d->suspendMatching) {
return;
}
QTime time;
time.restart();
//The local copy is already obtained in the job
match(localContext);
// automatically rate limit runners that become slooow
const int runtime = time.elapsed();
bool slowed = speed() == SlowSpeed;
if (!slowed && runtime > reasonableRunTime) {
// we punish runners that return too slowly, even if they don't bring
// back matches
#ifndef NDEBUG
kDebug() << id() << "runner is too slow, putting it on the back burner.";
#endif
d->fastRuns = 0;
setSpeed(SlowSpeed);
}
if (slowed && runtime < fastEnoughTime && localContext.query().size() > 2) {
++d->fastRuns;
if (d->fastRuns > 2) {
// we reward slowed runners who bring back matches fast enough
// 3 times in a row
#ifndef NDEBUG
kDebug() << id() << "runner is faster than we thought, kicking it up a notch";
#endif
setSpeed(NormalSpeed);
}
}
}
QList<QAction*> AbstractRunner::actionsForMatch(const Plasma::QueryMatch &match)
{
Q_UNUSED(match)
QList<QAction*> ret;
if (d->script) {
emit d->script->actionsForMatch(match, &ret);
}
return ret;
}
QAction* AbstractRunner::addAction(const QString &id, const QIcon &icon, const QString &text)
{
QAction *a = new QAction(icon, text, this);
d->actions.insert(id, a);
return a;
}
void AbstractRunner::addAction(const QString &id, QAction *action)
{
d->actions.insert(id, action);
}
void AbstractRunner::removeAction(const QString &id)
{
QAction *a = d->actions.take(id);
delete a;
}
QAction* AbstractRunner::action(const QString &id) const
{
return d->actions.value(id);
}
QHash<QString, QAction*> AbstractRunner::actions() const
{
return d->actions;
}
void AbstractRunner::clearActions()
{
qDeleteAll(d->actions);
d->actions.clear();
}
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QMimeData *AbstractRunner::mimeDataForMatch(const QueryMatch &match)
{
Q_UNUSED(match)
return 0;
}
bool AbstractRunner::hasRunOptions()
{
return d->hasRunOptions;
}
void AbstractRunner::setHasRunOptions(bool hasRunOptions)
{
d->hasRunOptions = hasRunOptions;
}
void AbstractRunner::createRunOptions(QWidget *parent)
{
if (d->script) {
emit d->script->createRunOptions(parent);
}
}
AbstractRunner::Speed AbstractRunner::speed() const
{
// the only time the read lock will fail is if we were slow are going to speed up
// or if we were fast and are going to slow down; so don't wait in this case, just
// say we're slow. we either will be soon or were just a moment ago and it doesn't
// hurt to do one more run the slow way
if (!d->speedLock.tryLockForRead()) {
return SlowSpeed;
}
Speed s = d->speed;
d->speedLock.unlock();
return s;
}
void AbstractRunner::setSpeed(Speed speed)
{
d->speedLock.lockForWrite();
d->speed = speed;
d->speedLock.unlock();
}
AbstractRunner::Priority AbstractRunner::priority() const
{
return d->priority;
}
void AbstractRunner::setPriority(Priority priority)
{
d->priority = priority;
}
RunnerContext::Types AbstractRunner::ignoredTypes() const
{
return d->blackListed;
}
void AbstractRunner::setIgnoredTypes(RunnerContext::Types types)
{
d->blackListed = types;
}
void AbstractRunner::run(const Plasma::RunnerContext &search, const Plasma::QueryMatch &action)
{
if (d->script) {
return d->script->run(search, action);
}
}
void AbstractRunner::match(Plasma::RunnerContext &search)
{
if (d->script) {
return d->script->match(search);
}
}
QString AbstractRunner::name() const
{
if (d->runnerDescription.isValid()) {
return d->runnerDescription.name();
}
return objectName();
}
QIcon AbstractRunner::icon() const
{
if (d->runnerDescription.isValid()) {
return KDE::icon(d->runnerDescription.icon());
}
return QIcon();
}
QString AbstractRunner::id() const
{
if (d->runnerDescription.isValid()) {
return d->runnerDescription.pluginName();
}
return objectName();
}
QString AbstractRunner::description() const
{
if (d->runnerDescription.isValid()) {
return d->runnerDescription.property("Comment").toString();
}
return objectName();
}
Package AbstractRunner::package() const
{
return d->package ? *d->package : Package();
}
void AbstractRunner::init()
{
if (d->script) {
d->setupScriptSupport();
d->script->init();
}
reloadConfiguration();
}
DataEngine *AbstractRunner::dataEngine(const QString &name) const
{
return d->dataEngine(name);
}
bool AbstractRunner::isMatchingSuspended() const
{
return d->suspendMatching;
}
void AbstractRunner::suspendMatching(bool suspend)
{
if (d->suspendMatching == suspend) {
return;
}
d->suspendMatching = suspend;
emit matchingSuspended(suspend);
}
AbstractRunnerPrivate::AbstractRunnerPrivate(AbstractRunner *r)
: priority(AbstractRunner::NormalPriority),
speed(AbstractRunner::NormalSpeed),
blackListed(0),
script(0),
runner(r),
fastRuns(0),
package(0),
defaultSyntax(0),
hasRunOptions(false),
suspendMatching(false)
{
}
AbstractRunnerPrivate::~AbstractRunnerPrivate()
{
delete script;
script = 0;
delete package;
package = 0;
}
void AbstractRunnerPrivate::init(const KService::Ptr service)
{
runnerDescription = KPluginInfo(service);
if (runnerDescription.isValid()) {
const QString api = runnerDescription.property("X-Plasma-API").toString();
if (!api.isEmpty()) {
const QString path = QStandardPaths::locate(QStandardPaths::GenericDataLocation, "plasma/runners/" + runnerDescription.pluginName() + '/');
prepScripting(path, api);
if (!script) {
#ifndef NDEBUG
kDebug() << "Could not create a(n)" << api << "ScriptEngine for the" << runnerDescription.name() << "Runner.";
#endif
}
}
}
}
void AbstractRunnerPrivate::init(const QString &path)
{
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runnerDescription = KPluginInfo(path + "/metadata.desktop");
const QString api = runnerDescription.property("X-Plasma-API").toString();
prepScripting(path, api);
}
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void AbstractRunnerPrivate::prepScripting(const QString &path, const QString &api)
{
if (script) {
return;
}
delete package;
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package = 0;
if (api.isEmpty()) {
return;
}
package = new Package(PluginLoader::self()->loadPackage("Plasma/Runner", api));
package->setPath(path);
if (!package->isValid()) {
#ifndef NDEBUG
kDebug() << "Invalid Runner package at" << path;
#endif
return;
}
script = Plasma::loadScriptEngine(api, runner);
if (!script) {
delete package;
package = 0;
}
}
// put all setup routines for script here. at this point we can assume that
// package exists and that we have a script engine
void AbstractRunnerPrivate::setupScriptSupport()
{
if (!package) {
return;
}
#ifndef NDEBUG
kDebug() << "setting up script support, package is in" << package->path()
<< ", main script is" << package->filePath("mainscript");
#endif
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const QString translationsPath = package->filePath("translations");
if (!translationsPath.isEmpty()) {
KGlobal::dirs()->addResourceDir("locale", translationsPath);
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KLocalizedString::insertCatalog(runnerDescription.pluginName());
}
}
} // Plasma namespace
#include "moc_abstractrunner.cpp"