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#include "scriptingqt.h"
#include "common/unused.h"
#include "common/global.h"
#include "scriptingqtdbproxy.h"
#include <QScriptEngine>
#include <QMutex>
#include <QMutexLocker>
#include <QDebug>
static QScriptValue scriptingQtDebug(QScriptContext *context, QScriptEngine *engine)
{
UNUSED(engine);
QStringList args;
for (int i = 0; i < context->argumentCount(); i++)
args << context->argument(i).toString();
qDebug() << "[ScriptingQt]" << args;
return QScriptValue();
}
ScriptingQt::ScriptingQt()
{
mainEngineMutex = new QMutex();
}
ScriptingQt::~ScriptingQt()
{
safe_delete(mainEngineMutex);
}
QString ScriptingQt::getLanguage() const
{
return QStringLiteral("QtScript");
}
ScriptingPlugin::Context* ScriptingQt::createContext()
{
ContextQt* ctx = new ContextQt;
ctx->engine->pushContext();
contexts << ctx;
return ctx;
}
void ScriptingQt::releaseContext(ScriptingPlugin::Context* context)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return;
contexts.removeOne(ctx);
delete ctx;
}
void ScriptingQt::resetContext(ScriptingPlugin::Context* context)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return;
ctx->engine->popContext();
ctx->engine->pushContext();
}
QVariant ScriptingQt::evaluate(const QString& code, const QList<QVariant>& args, Db* db, bool locking, QString* errorMessage)
{
QMutexLocker locker(mainEngineMutex);
// Enter a new context
QScriptContext* engineContext = mainContext->engine->pushContext();
// Call the function
QVariant result = evaluate(mainContext, engineContext, code, args, db, locking);
// Handle errors
if (!mainContext->error.isEmpty())
*errorMessage = mainContext->error;
// Leave the context to reset "this".
mainContext->engine->popContext();
return result;
}
QVariant ScriptingQt::evaluate(ScriptingPlugin::Context* context, const QString& code, const QList<QVariant>& args, Db* db, bool locking)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return QVariant();
return evaluate(ctx, ctx->engine->currentContext(), code, args, db, locking);
}
QVariant ScriptingQt::evaluate(ContextQt* ctx, QScriptContext* engineContext, const QString& code, const QList<QVariant>& args, Db* db, bool locking)
{
// Define function to call
QScriptValue functionValue = getFunctionValue(ctx, code);
// Db for this evaluation
ctx->dbProxy->setDb(db);
ctx->dbProxy->setUseDbLocking(locking);
// Call the function
QScriptValue result;
if (args.size() > 0)
result = functionValue.call(engineContext->activationObject(), ctx->engine->toScriptValue(args));
else
result = functionValue.call(engineContext->activationObject());
// Handle errors
ctx->error.clear();
if (ctx->engine->hasUncaughtException())
ctx->error = ctx->engine->uncaughtException().toString();
ctx->dbProxy->setDb(nullptr);
ctx->dbProxy->setUseDbLocking(false);
return convertVariant(result.toVariant());
}
QVariant ScriptingQt::convertVariant(const QVariant& value, bool wrapStrings)
{
switch (value.type())
{
case QVariant::Hash:
{
QHash<QString, QVariant> hash = value.toHash();
QHashIterator<QString, QVariant> it(hash);
QStringList list;
while (it.hasNext())
{
it.next();
list << it.key() + ": " + convertVariant(it.value(), true).toString();
}
return "{" + list.join(", ") + "}";
}
case QVariant::Map:
{
QMap<QString, QVariant> map = value.toMap();
QMapIterator<QString, QVariant> it(map);
QStringList list;
while (it.hasNext())
{
it.next();
list << it.key() + ": " + convertVariant(it.value(), true).toString();
}
return "{" + list.join(", ") + "}";
}
case QVariant::List:
{
QStringList list;
for (const QVariant& var : value.toList())
list << convertVariant(var, true).toString();
return "[" + list.join(", ") + "]";
}
case QVariant::StringList:
{
return "[\"" + value.toStringList().join("\", \"") + "\"]";
}
case QVariant::String:
{
if (wrapStrings)
return "\"" + value.toString() + "\"";
break;
}
default:
break;
}
return value;
}
void ScriptingQt::setVariable(ScriptingPlugin::Context* context, const QString& name, const QVariant& value)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return;
ctx->engine->globalObject().setProperty(name, ctx->engine->newVariant(value));
}
QVariant ScriptingQt::getVariable(ScriptingPlugin::Context* context, const QString& name)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return QVariant();
QScriptValue value = ctx->engine->globalObject().property(name);
return convertVariant(value.toVariant());
}
bool ScriptingQt::hasError(ScriptingPlugin::Context* context) const
{
ContextQt* ctx = getContext(context);
if (!ctx)
return false;
return !ctx->error.isEmpty();
}
QString ScriptingQt::getErrorMessage(ScriptingPlugin::Context* context) const
{
ContextQt* ctx = getContext(context);
if (!ctx)
return QString::null;
return ctx->error;
}
QString ScriptingQt::getIconPath() const
{
return ":/images/plugins/scriptingqt.png";
}
bool ScriptingQt::init()
{
QMutexLocker locker(mainEngineMutex);
mainContext = new ContextQt;
return true;
}
void ScriptingQt::deinit()
{
foreach (Context* ctx, contexts)
delete ctx;
contexts.clear();
QMutexLocker locker(mainEngineMutex);
safe_delete(mainContext);
}
ScriptingQt::ContextQt* ScriptingQt::getContext(ScriptingPlugin::Context* context) const
{
ContextQt* ctx = dynamic_cast<ContextQt*>(context);
if (!ctx)
qDebug() << "Invalid context passed to ScriptingQt:" << context;
return ctx;
}
QScriptValue ScriptingQt::getFunctionValue(ContextQt* ctx, const QString& code)
{
static const QString fnDef = QStringLiteral("(function () {%1\n})");
QScriptProgram* prog = nullptr;
if (!ctx->scriptCache.contains(code))
{
prog = new QScriptProgram(fnDef.arg(code));
ctx->scriptCache.insert(code, prog);
}
else
{
prog = ctx->scriptCache[code];
}
return ctx->engine->evaluate(*prog);
}
ScriptingQt::ContextQt::ContextQt()
{
engine = new QScriptEngine();
dbProxy = new ScriptingQtDbProxy();
dbProxyScriptValue = engine->newQObject(dbProxy, QScriptEngine::QtOwnership, QScriptEngine::ExcludeDeleteLater);
engine->globalObject().setProperty("debug", engine->newFunction(scriptingQtDebug));
engine->globalObject().setProperty("db", dbProxyScriptValue);
scriptCache.setMaxCost(cacheSize);
}
ScriptingQt::ContextQt::~ContextQt()
{
safe_delete(engine);
safe_delete(dbProxy);
}
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