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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing
**
** This file is part of the Qt Build Suite.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms and
** conditions see http://www.qt.io/terms-conditions. For further information
** use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "evaluator.h"
#include "evaluationdata.h"
#include "evaluatorscriptclass.h"
#include "filecontext.h"
#include "filetags.h"
#include "item.h"
#include "scriptengine.h"
#include <jsextensions/jsextensions.h>
#include <logging/translator.h>
#include <tools/error.h>
#include <tools/scripttools.h>
#include <tools/qbsassert.h>
#include <QDebug>
namespace qbs {
namespace Internal {
Evaluator::Evaluator(ScriptEngine *scriptEngine, const Logger &logger)
: m_scriptEngine(scriptEngine)
, m_scriptClass(new EvaluatorScriptClass(scriptEngine, logger))
{
}
Evaluator::~Evaluator()
{
QHash<const Item *, QScriptValue>::iterator it = m_scriptValueMap.begin();
for (; it != m_scriptValueMap.end(); ++it) {
EvaluationData *data = attachedPointer<EvaluationData>(*it);
if (data) {
if (data->item)
data->item->setPropertyObserver(0);
delete data;
}
}
delete m_scriptClass;
}
QScriptValue Evaluator::property(const Item *item, const QString &name)
{
return scriptValue(item).property(name);
}
QScriptValue Evaluator::value(const Item *item, const QString &name, bool *propertyWasSet)
{
QScriptValue v;
evaluateProperty(&v, item, name, propertyWasSet);
return v;
}
bool Evaluator::boolValue(const Item *item, const QString &name, bool defaultValue,
bool *propertyWasSet)
{
QScriptValue v;
if (!evaluateProperty(&v, item, name, propertyWasSet))
return defaultValue;
return v.toBool();
}
FileTags Evaluator::fileTagsValue(const Item *item, const QString &name, bool *propertySet)
{
return FileTags::fromStringList(stringListValue(item, name, propertySet));
}
QString Evaluator::stringValue(const Item *item, const QString &name,
const QString &defaultValue, bool *propertyWasSet)
{
QScriptValue v;
if (!evaluateProperty(&v, item, name, propertyWasSet))
return defaultValue;
return v.toString();
}
static QStringList toStringList(const QScriptValue &scriptValue,
const Item *item, const QString &propertyName)
{
if (scriptValue.isString()) {
return QStringList(scriptValue.toString());
} else if (scriptValue.isArray()) {
QStringList lst;
int i = 0;
forever {
QScriptValue elem = scriptValue.property(i++);
if (!elem.isValid())
break;
if (elem.isUndefined()) {
throw ErrorInfo(Tr::tr("Array element at index %1 is undefined. String expected.")
.arg(i - 1),
item->property(propertyName)->location());
}
if (elem.isArray() || elem.isObject()) {
// Let's assume all other JS types are convertible to string.
throw ErrorInfo(Tr::tr("Expected array element of type String at index %1.")
.arg(i - 1),
item->property(propertyName)->location());
}
lst.append(elem.toString());
}
return lst;
}
return QStringList();
}
QStringList Evaluator::stringListValue(const Item *item, const QString &name, bool *propertyWasSet)
{
QScriptValue v = property(item, name);
if (propertyWasSet)
*propertyWasSet = v.isValid() && !v.isUndefined();
handleEvaluationError(item, name, v);
return toStringList(v, item, name);
}
QScriptValue Evaluator::scriptValue(const Item *item)
{
QScriptValue &scriptValue = m_scriptValueMap[item];
if (scriptValue.isObject()) {
// already initialized
return scriptValue;
}
EvaluationData *edata = new EvaluationData;
edata->evaluator = this;
edata->item = item;
edata->item->setPropertyObserver(this);
scriptValue = m_scriptEngine->newObject(m_scriptClass);
attachPointerTo(scriptValue, edata);
return scriptValue;
}
void Evaluator::onItemPropertyChanged(Item *item)
{
EvaluationData *data = attachedPointer<EvaluationData>(m_scriptValueMap.value(item));
if (data)
data->valueCache.clear();
}
void Evaluator::onItemDestroyed(Item *item)
{
delete attachedPointer<EvaluationData>(m_scriptValueMap.value(item));
m_scriptValueMap.remove(item);
}
void Evaluator::handleEvaluationError(const Item *item, const QString &name,
const QScriptValue &scriptValue)
{
if (Q_LIKELY(!m_scriptEngine->hasErrorOrException(scriptValue)))
return;
QString message;
QString filePath;
int line = -1;
const QScriptValue value = scriptValue.isError() ? scriptValue
: m_scriptEngine->uncaughtException();
if (value.isError()) {
QScriptValue v = value.property(QStringLiteral("message"));
if (v.isString())
message = v.toString();
v = value.property(QStringLiteral("fileName"));
if (v.isString())
filePath = v.toString();
v = value.property(QStringLiteral("lineNumber"));
if (v.isNumber())
line = v.toInt32();
} else {
message = value.toString();
const ValueConstPtr value = item->property(name);
if (value) {
const CodeLocation location = value->location();
filePath = location.filePath();
line = location.line();
}
}
throw ErrorInfo(message, CodeLocation(filePath, line, -1, false));
}
bool Evaluator::evaluateProperty(QScriptValue *result, const Item *item, const QString &name,
bool *propertyWasSet)
{
*result = property(item, name);
handleEvaluationError(item, name, *result);
if (!result->isValid() || result->isUndefined()) {
if (propertyWasSet)
*propertyWasSet = false;
return false;
}
if (propertyWasSet)
*propertyWasSet = true;
return true;
}
QScriptValue Evaluator::fileScope(const FileContextConstPtr &file)
{
QScriptValue &result = m_fileScopeMap[file];
if (result.isObject()) {
// already initialized
return result;
}
if (file->idScope())
result = scriptValue(file->idScope());
else
result = m_scriptEngine->newObject();
result.setProperty(QLatin1String("filePath"), file->filePath());
result.setProperty(QLatin1String("path"), file->dirPath());
m_scriptEngine->import(file, result, result);
JsExtensions::setupExtensions(file->jsExtensions(), result);
return result;
}
void Evaluator::setCachingEnabled(bool enabled)
{
m_scriptClass->setValueCacheEnabled(enabled);
}
} // namespace Internal
} // namespace qbs
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