plasma-framework/scriptengines/javascript/javascriptdataengine.cpp

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/*
* Copyright 2009 Aaron Seigo <aseigo@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, 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 "javascriptdataengine.h"
#include <QScriptEngine>
#include "authorization.h"
#include "scriptenv.h"
#include "simplebindings/dataengine.h"
#include "simplebindings/i18n.h"
JavaScriptDataEngine::JavaScriptDataEngine(QObject *parent, const QVariantList &args)
: DataEngineScript(parent)
{
Q_UNUSED(args);
m_qscriptEngine = new QScriptEngine(this);
m_env = new ScriptEnv(this, m_qscriptEngine);
connect(m_qscriptEngine, SIGNAL(reportError(ScriptEnv*,bool)), this, SLOT(reportError(ScriptEnv*,bool)));
}
bool JavaScriptDataEngine::init()
{
QScriptValue global = m_qscriptEngine->globalObject();
bindI18N(m_qscriptEngine);
QScriptValue iface = m_qscriptEngine->newQObject(this);
iface.setScope(global);
global.setProperty("engine", iface);
global.setProperty("setData", m_qscriptEngine->newFunction(JavaScriptDataEngine::jsSetData));
global.setProperty("removeAllData", m_qscriptEngine->newFunction(JavaScriptDataEngine::jsRemoveAllData));
global.setProperty("removeData", m_qscriptEngine->newFunction(JavaScriptDataEngine::jsRemoveData));
global.setProperty("removeAllSources", m_qscriptEngine->newFunction(JavaScriptDataEngine::jsRemoveAllSources));
registerDataEngineMetaTypes(m_qscriptEngine);
Authorization auth;
if (!m_env->importExtensions(description(), iface, auth)) {
return false;
}
return true;
}
void JavaScriptDataEngine::jsSetMaxSourceCount(int count)
{
setMaxSourceCount(count);
}
int JavaScriptDataEngine::maxSourceCount() const
{
return dataEngine()->maxSourceCount();
}
void JavaScriptDataEngine::jsSetMinimumPollingInterval(int interval)
{
setMinimumPollingInterval(interval);
}
int JavaScriptDataEngine::minimumPollingInterval() const
{
return minimumPollingInterval();
}
void JavaScriptDataEngine::jsSetPollingInterval(int interval)
{
setPollingInterval(interval);
}
int JavaScriptDataEngine::pollingInterval() const
{
return pollingInterval();
}
QScriptValue JavaScriptDataEngine::jsSetData(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() < 2) {
return context->throwError(i18n("setData() takes at least two arguments"));
}
QString error;
JavaScriptDataEngine *iFace = extractIFace(engine, error);
if (!iFace) {
return context->throwError(error);
}
QString source = context->argument(0).toString();
QString value = context->argument(1).toString();
if (context->argumentCount() > 2) {
QString key = value;
QString value = context->argument(2).toString();
iFace->setData(source, key, value);
} else {
iFace->setData(source, value);
}
return engine->newVariant(true);
}
JavaScriptDataEngine *JavaScriptDataEngine::extractIFace(QScriptEngine *engine, QString &error)
{
JavaScriptDataEngine *interface = 0;
QScriptValue engineValue = engine->globalObject().property("engine");
QObject *engineObject = engineValue.toQObject();
if (!engineObject) {
error = i18n("Could not extract the DataEngineObject");
} else {
interface = qobject_cast<JavaScriptDataEngine *>(engineObject);
if (!interface) {
error = i18n("Could not extract the DataEngine");
}
}
return interface;
}
QScriptValue JavaScriptDataEngine::jsRemoveAllData(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() < 1) {
return context->throwError(i18n("removeAllData() takes at least one argument (the source name)"));
}
QString source = context->argument(0).toString();
QString error;
JavaScriptDataEngine *iFace = extractIFace(engine, error);
if (iFace) {
iFace->removeAllData(source);
return engine->newVariant(true);
}
return context->throwError(error);
}
QScriptValue JavaScriptDataEngine::jsRemoveData(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() < 2) {
return context->throwError(i18n("removeData() takes at least two arguments (the source and key names)"));
}
QString source = context->argument(0).toString();
QString key = context->argument(1).toString();
QString error;
JavaScriptDataEngine *iFace = extractIFace(engine, error);
if (iFace) {
iFace->removeData(source, key);
return engine->newVariant(true);
}
return context->throwError(error);
}
QScriptValue JavaScriptDataEngine::jsRemoveAllSources(QScriptContext *context, QScriptEngine *engine)
{
QString error;
JavaScriptDataEngine *iFace = extractIFace(engine, error);
if (iFace) {
iFace->removeAllSources();
return engine->newVariant(true);
}
return context->throwError(error);
}
QScriptValue JavaScriptDataEngine::callFunction(const QString &functionName, const QScriptValueList &args) const
{
QScriptValue fun = iface.property(functionName);
if (fun.isFunction()) {
QScriptContext *ctx = m_qscriptEngine->pushContext();
ctx->setActivationObject(iface);
QScriptValue rv = fun.call(iface, args);
m_qscriptEngine->popContext();
if (m_qscriptEngine->hasUncaughtException()) {
reportError(m_env, false);
} else {
return rv;
}
}
return QScriptValue();
}
void JavaScriptDataEngine::reportError(ScriptEnv *env, bool fatal) const
{
Q_UNUSED(fatal)
kDebug() << "Error: " << env->engine()->uncaughtException().toString()
<< " at line " << env->engine()->uncaughtExceptionLineNumber() << endl;
kDebug() << env->engine()->uncaughtExceptionBacktrace();
}
QStringList JavaScriptDataEngine::sources() const
{
QScriptValueList args;
QScriptValue rv = callFunction("sources", args);
if (rv.isValid() && rv.isVariant()) {
return rv.toVariant().toStringList();
}
return QStringList();
}
bool JavaScriptDataEngine::sourceRequestEvent(const QString &name)
{
QScriptValueList args;
args << name;
QScriptValue rv = callFunction("sourceRequestEvent", args);
if (rv.isValid() && rv.isBool()) {
return rv.toBool();
}
return false;
}
bool JavaScriptDataEngine::updateSourceEvent(const QString &source)
{
QScriptValueList args;
args << source;
QScriptValue rv = callFunction("updateSourceEvent", args);
if (rv.isValid() && rv.isBool()) {
return rv.toBool();
}
return false;
}
Plasma::Service *JavaScriptDataEngine::serviceForSource(const QString &source)
{
QScriptValueList args;
args << source;
QScriptValue rv = callFunction("updateSourceEvent", args);
if (rv.isValid() && rv.isQObject()) {
return qobject_cast<Plasma::Service *>(rv.toQObject());
}
return 0;
}
K_EXPORT_PLASMA_DATAENGINESCRIPTENGINE(javascriptdataengine, JavaScriptDataEngine)
#include <javascriptdataengine.moc>