plasma-framework/scriptengines/javascript/runner/javascriptrunner.cpp

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/*
* Copyright 2008 Richard J. Moore <rich@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 version 2 as
* published by the Free Software Foundation
*
* 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 "javascriptrunner.h"
#include <QFile>
#include <KDebug>
#include <Plasma/AbstractRunner>
#include <Plasma/Package>
#include <Plasma/QueryMatch>
#include "authorization.h"
#include "scriptenv.h"
typedef const Plasma::RunnerContext* ConstRunnerContextStar;
typedef const Plasma::QueryMatch* ConstSearchMatchStar;
Q_DECLARE_METATYPE(Plasma::QueryMatch*)
Q_DECLARE_METATYPE(Plasma::RunnerContext*)
Q_DECLARE_METATYPE(ConstRunnerContextStar)
Q_DECLARE_METATYPE(ConstSearchMatchStar)
JavaScriptRunner::JavaScriptRunner(QObject *parent, const QVariantList &args)
: RunnerScript(parent)
{
Q_UNUSED(args);
m_engine = new QScriptEngine(this);
m_env = new ScriptEnv(this, m_engine);
connect(m_engine, SIGNAL(reportError(ScriptEnv*,bool)), this, SLOT(reportError(ScriptEnv*,bool)));
}
JavaScriptRunner::~JavaScriptRunner()
{
}
Plasma::AbstractRunner* JavaScriptRunner::runner() const
{
return RunnerScript::runner();
}
bool JavaScriptRunner::init()
{
setupObjects();
Authorization auth;
if (!m_env->importExtensions(description(), m_self, auth)) {
return false;
}
QFile file(mainScript());
if (!file.open(QIODevice::ReadOnly | QIODevice::Text) ) {
kWarning() << "Unable to load script file";
return false;
}
QString script = file.readAll();
kDebug() << "Script says" << script;
m_engine->evaluate(script);
if (m_engine->hasUncaughtException()) {
reportError(m_env, true);
return false;
}
return m_env->include(mainScript());
}
void JavaScriptRunner::match(Plasma::RunnerContext &search)
{
QScriptValue fun = m_self.property("match");
if (!fun.isFunction()) {
kDebug() << "Script: match is not a function, " << fun.toString();
return;
}
QScriptValueList args;
args << m_engine->toScriptValue(&search);
QScriptContext *ctx = m_engine->pushContext();
ctx->setActivationObject(m_self);
fun.call(m_self, args);
m_engine->popContext();
if (m_engine->hasUncaughtException()) {
reportError(m_env, false);
m_engine->clearExceptions();
}
}
void JavaScriptRunner::exec(const Plasma::RunnerContext *search, const Plasma::QueryMatch *action)
{
QScriptValue fun = m_self.property("exec");
if (!fun.isFunction()) {
kDebug() << "Script: exec is not a function, " << fun.toString();
return;
}
QScriptValueList args;
args << m_engine->toScriptValue(search);
args << m_engine->toScriptValue(action);
QScriptContext *ctx = m_engine->pushContext();
ctx->setActivationObject(m_self);
fun.call(m_self, args);
m_engine->popContext();
if (m_engine->hasUncaughtException()) {
reportError(m_env, false);
m_engine->clearExceptions();
}
}
void JavaScriptRunner::setupObjects()
{
QScriptValue global = m_engine->globalObject();
// Expose the runner
m_self = m_engine->newQObject(this);
m_self.setScope(global);
m_env->addMainObjectProperties(m_self);
global.setProperty("runner", m_self);
}
void JavaScriptRunner::reportError(ScriptEnv *env, bool fatal)
{
Q_UNUSED(fatal)
kDebug() << "Error: " << env->engine()->uncaughtException().toString()
<< " at line " << env->engine()->uncaughtExceptionLineNumber() << endl;
kDebug() << env->engine()->uncaughtExceptionBacktrace();
}
QString JavaScriptRunner::filePath(const char *type, const QString &file) const
{
const QString path = m_env->filePathFromScriptContext(type, file);
if (!path.isEmpty()) {
return path;
}
return package()->filePath(type, file);
}
bool JavaScriptRunner::include(const QString &script)
{
const QString path = filePath("scripts", script);
if (path.isEmpty()) {
return false;
}
return m_env->include(path);
}
#include "javascriptrunner.moc"