plasma-framework/scriptengines/javascript/scriptenv.cpp
Aaron J. Seigo d1451eeca0 report and clear exceptions, even when caused by a method connected to a signal
BUG:234811

svn path=/trunk/KDE/kdebase/runtime/; revision=1124155
2010-05-07 23:37:25 +00:00

352 lines
10 KiB
C++

/*
* Copyright 2007-2008 Richard J. Moore <rich@kde.org>
* Copyright 2009 Aaron J. 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 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 "scriptenv.h"
#include <iostream>
#include <QFile>
#include <QMetaEnum>
#include <KDebug>
#include <KIO/Job>
#include <KLocale>
#include <KMimeType>
#include <KService>
#include <KShell>
#include <KStandardDirs>
#include <KRun>
#ifdef USEGUI
#include "simplebindings/filedialogproxy.h"
#endif
Q_DECLARE_METATYPE(ScriptEnv*)
ScriptEnv::ScriptEnv(QObject *parent, QScriptEngine *engine)
: QObject(parent),
m_allowedUrls(NoUrls),
m_engine(engine)
{
QScriptValue global = m_engine->globalObject();
// Add utility functions
global.setProperty("print", m_engine->newFunction(ScriptEnv::print));
global.setProperty("debug", m_engine->newFunction(ScriptEnv::debug));
// Add an accessor so we can find the scriptenv given only the engine. The
// property is hidden from scripts.
global.setProperty("__plasma_scriptenv", m_engine->newQObject(this),
QScriptValue::ReadOnly|QScriptValue::Undeletable|QScriptValue::SkipInEnumeration);
connect(m_engine, SIGNAL(signalHandlerException(QScriptValue)), this, SLOT(signalException()));
}
ScriptEnv::~ScriptEnv()
{
}
QScriptEngine *ScriptEnv::engine() const
{
return m_engine;
}
ScriptEnv *ScriptEnv::findScriptEnv(QScriptEngine *engine)
{
QScriptValue global = engine->globalObject();
return qscriptvalue_cast<ScriptEnv*>(global.property("__plasma_scriptenv"));
}
void ScriptEnv::signalException()
{
checkForErrors(false);
}
void ScriptEnv::registerEnums(QScriptValue &scriptValue, const QMetaObject &meta)
{
//manually create enum values. ugh
QScriptEngine *engine = scriptValue.engine();
for (int i = 0; i < meta.enumeratorCount(); ++i) {
QMetaEnum e = meta.enumerator(i);
//kDebug() << e.name();
for (int i=0; i < e.keyCount(); ++i) {
//kDebug() << e.key(i) << e.value(i);
scriptValue.setProperty(e.key(i), QScriptValue(engine, e.value(i)));
}
}
}
bool ScriptEnv::include(const QString &path)
{
QFile file(path);
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
kWarning() << i18n("Unable to load script file: %1", path);
return false;
}
QString script = file.readAll();
//kDebug() << "Script says" << script;
// change the context to the parent context so that the include is actually
// executed in the same context as the caller; seems to be what javascript
// coders expect :)
QScriptContext *ctx = m_engine->currentContext();
if (ctx && ctx->parentContext()) {
ctx->setActivationObject(ctx->parentContext()->activationObject());
ctx->setThisObject(ctx->parentContext()->thisObject());
}
m_engine->evaluate(script, path);
return !checkForErrors(true);
}
bool ScriptEnv::checkForErrors(bool fatal)
{
if (m_engine->hasUncaughtException()) {
emit reportError(this, fatal);
if (!fatal) {
m_engine->clearExceptions();
}
return true;
}
return false;
}
QScriptValue ScriptEnv::runApplication(QScriptContext *context, QScriptEngine *engine)
{
Q_UNUSED(engine)
if (context->argumentCount() == 0) {
return false;
}
KUrl::List urls;
if (context->argumentCount() > 1) {
urls = qscriptvalue_cast<KUrl::List>(context->argument(1));
}
const QString app = context->argument(0).toString();
const QString exec = KGlobal::dirs()->findExe(app);
if (!exec.isEmpty()) {
return KRun::run(exec, urls, 0);
}
KService::Ptr service = KService::serviceByStorageId(app);
if (service) {
return KRun::run(*service, urls, 0);
}
return false;
}
QScriptValue ScriptEnv::runCommand(QScriptContext *context, QScriptEngine *engine)
{
Q_UNUSED(engine);
if (context->argumentCount() == 0) {
return false;
}
const QString exec = KGlobal::dirs()->findExe(context->argument(0).toString());
if (!exec.isEmpty()) {
QString args;
if (context->argumentCount() > 1) {
const QStringList argList = qscriptvalue_cast<QStringList>(context->argument(1));
if (!argList.isEmpty()) {
args = ' ' + KShell::joinArgs(argList);
}
}
return KRun::runCommand(exec + args, 0);
}
return false;
}
QScriptValue ScriptEnv::openUrl(QScriptContext *context, QScriptEngine *engine)
{
Q_UNUSED(engine)
if (context->argumentCount() == 0) {
return false;
}
QScriptValue v = context->argument(0);
KUrl url = v.isString() ? KUrl(v.toString()) : qscriptvalue_cast<KUrl>(v);
if (url.isValid()) {
return KRun::runUrl(url, KMimeType::findByUrl(url)->name(), 0);
}
return false;
}
// TODO these should throw an exception
QScriptValue ScriptEnv::getUrl(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() == 0) {
return engine->undefinedValue();
}
QScriptValue v = context->argument(0);
KUrl url = v.isString() ? KUrl(v.toString()) : qscriptvalue_cast<KUrl>(v);
if (!url.isValid()) {
return engine->undefinedValue();
}
ScriptEnv *env = ScriptEnv::findScriptEnv(engine);
if (!env) {
kDebug() << "findScriptEnv failed";
return engine->undefinedValue();
}
if (url.isLocalFile()) {
if (!(env->m_allowedUrls & LocalUrls)) {
return engine->undefinedValue();
}
} else if (!(env->m_allowedUrls & NetworkUrls) &&
!((env->m_allowedUrls & HttpUrls) && (url.protocol() == "http" || url.protocol() == "https"))) {
return engine->undefinedValue();
}
KIO::Job *job = KIO::get(url, KIO::NoReload, KIO::HideProgressInfo);
return engine->newQObject(job);
}
void ScriptEnv::registerGetUrl(QScriptValue &obj)
{
QScriptValue get = obj.property("getUrl");
if (!get.isValid()) {
obj.setProperty("getUrl", m_engine->newFunction(ScriptEnv::getUrl));
}
}
bool ScriptEnv::importBuiltinExtension(const QString &extension, QScriptValue &obj)
{
kDebug() << extension;
if ("filedialog" == extension) {
#ifdef USEGUI
FileDialogProxy::registerWithRuntime(m_engine);
return true;
#endif
} else if ("launchapp" == extension) {
obj.setProperty("runApplication", m_engine->newFunction(ScriptEnv::runApplication));
obj.setProperty("runCommand", m_engine->newFunction(ScriptEnv::runCommand));
obj.setProperty("openUrl", m_engine->newFunction(ScriptEnv::openUrl));
return true;
} else if ("http" == extension) {
m_allowedUrls |= HttpUrls;
registerGetUrl(obj);
return true;
} else if ("networkio" == extension) {
m_allowedUrls |= HttpUrls | NetworkUrls;
registerGetUrl(obj);
return true;
} else if ("localio" == extension) {
m_allowedUrls |= LocalUrls;
registerGetUrl(obj);
return true;
}
return false;
}
bool ScriptEnv::importExtensions(const KPluginInfo &info, QScriptValue &obj, Authorization &auth)
{
QStringList requiredExtensions = info.service()->property("X-Plasma-RequiredExtensions", QVariant::StringList).toStringList();
kDebug() << "required extensions are" << requiredExtensions;
foreach (const QString &ext, requiredExtensions) {
QString extension = ext.toLower();
if (m_extensions.contains(extension)) {
continue;
}
if (!auth.authorizeRequiredExtension(extension)) {
return false;
}
if (!importBuiltinExtension(extension, obj)) {
if (auth.authorizeExternalExtensions()) {
m_engine->importExtension(extension);
}
}
if (checkForErrors(true)) {
return false;
} else {
m_extensions << extension;
}
}
QStringList optionalExtensions = info.service()->property("X-Plasma-OptionalExtensions", QVariant::StringList).toStringList();
kDebug() << "optional extensions are" << optionalExtensions;
foreach (const QString &ext, optionalExtensions) {
QString extension = ext.toLower();
if (m_extensions.contains(extension)) {
continue;
}
if (!auth.authorizeOptionalExtension(extension)) {
continue;
}
if (!importBuiltinExtension(extension, obj)) {
if (auth.authorizeExternalExtensions()) {
m_engine->importExtension(extension);
}
}
if (!checkForErrors(false)) {
m_extensions << extension;
}
}
return true;
}
QSet<QString> ScriptEnv::loadedExtensions() const
{
return m_extensions;
}
QScriptValue ScriptEnv::debug(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() != 1) {
return context->throwError(i18n("debug takes one argument"));
}
kDebug() << context->argument(0).toString();
return engine->undefinedValue();
}
QScriptValue ScriptEnv::print(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() != 1) {
return context->throwError(i18n("print() takes one argument"));
}
std::cout << context->argument(0).toString().toLocal8Bit().constData() << std::endl;
return engine->undefinedValue();
}
#ifndef USEGUI
#include "scriptenv.moc"
#endif