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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt for Python.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "propertyspec.h"
#include "abstractmetalang.h"
#include "abstractmetabuilder_p.h"
#include "codemodel.h"
#include "messages.h"
#include "typesystem.h"
#include <QtCore/QHash>
#ifndef QT_NO_DEBUG_STREAM
# include <QtCore/QDebug>
#endif
#include <algorithm>
QPropertySpec::QPropertySpec(const TypeSystemProperty &ts,
const AbstractMetaType *type) :
m_name(ts.name),
m_read(ts.read),
m_write(ts.write),
m_designable(ts.designable),
m_reset(ts.reset),
m_type(type),
m_generateGetSetDef(ts.generateGetSetDef)
{
}
QPropertySpec::~QPropertySpec()
{
delete m_type;
}
bool QPropertySpec::isValid() const
{
return m_type != nullptr && !m_name.isEmpty() && !m_read.isEmpty();
}
const TypeEntry *QPropertySpec::typeEntry() const
{
return m_type->typeEntry();
}
// Parse a Q_PROPERTY macro
// Q_PROPERTY(QString objectName READ objectName WRITE setObjectName NOTIFY objectNameChanged)
// into a TypeSystemProperty.
TypeSystemProperty QPropertySpec::typeSystemPropertyFromQ_Property(const QString &declarationIn,
QString *errorMessage)
{
enum class PropertyToken { None, Read, Write, Designable, Reset };
static const QHash<QString, PropertyToken> tokenLookup = {
{QStringLiteral("READ"), PropertyToken::Read},
{QStringLiteral("WRITE"), PropertyToken::Write},
{QStringLiteral("DESIGNABLE"), PropertyToken::Designable},
{QStringLiteral("RESET"), PropertyToken::Reset}
};
errorMessage->clear();
TypeSystemProperty result;
// Q_PROPERTY(QString objectName READ objectName WRITE setObjectName NOTIFY objectNameChanged)
const QString declaration = declarationIn.simplified();
auto propertyTokens = declaration.split(QLatin1Char(' '), Qt::SkipEmptyParts);
// To properly parse complicated type declarations like
// "Q_PROPERTY(const QList<QString > *objectName READ objectName ..."
// we first search the first "READ" token, parse the subsequent tokens and
// extract type and name from the tokens before "READ".
const auto it = std::find_if(propertyTokens.cbegin(), propertyTokens.cend(),
[](const QString &t) { return tokenLookup.contains(t); });
if (it == propertyTokens.cend()) {
*errorMessage = QLatin1String("Invalid property specification, READ missing");
return result;
}
const int firstToken = int(it - propertyTokens.cbegin());
if (firstToken < 2) {
*errorMessage = QLatin1String("Insufficient number of tokens in property specification");
return result;
}
for (int pos = firstToken; pos + 1 < propertyTokens.size(); pos += 2) {
switch (tokenLookup.value(propertyTokens.at(pos))) {
case PropertyToken::Read:
result.read = propertyTokens.at(pos + 1);
break;
case PropertyToken::Write:
result.write = propertyTokens.at(pos + 1);
break;
case PropertyToken::Reset:
result.reset = propertyTokens.at(pos + 1);
break;
case PropertyToken::Designable:
result.designable = propertyTokens.at(pos + 1);
break;
case PropertyToken::None:
break;
}
}
const int namePos = firstToken - 1;
result.name = propertyTokens.at(namePos);
result.type = propertyTokens.constFirst();
for (int pos = 1; pos < namePos; ++pos)
result.type += QLatin1Char(' ') + propertyTokens.at(pos);
// Fix errors like "Q_PROPERTY(QXYSeries *series .." to be of type "QXYSeries*"
while (!result.name.isEmpty() && !result.name.at(0).isLetter()) {
result.type += result.name.at(0);
result.name.remove(0, 1);
}
if (!result.isValid())
*errorMessage = QLatin1String("Incomplete property specification");
return result;
}
// Create a QPropertySpec from a TypeSystemProperty, determining
// the AbstractMetaType from the type string.
QPropertySpec *QPropertySpec::fromTypeSystemProperty(AbstractMetaBuilderPrivate *b,
AbstractMetaClass *metaClass,
const TypeSystemProperty &ts,
const QStringList &scopes,
QString *errorMessage)
{
Q_ASSERT(ts.isValid());
QString typeError;
TypeInfo info = TypeParser::parse(ts.type, &typeError);
if (info.qualifiedName().isEmpty()) {
*errorMessage = msgPropertyTypeParsingFailed(ts.name, ts.type, typeError);
return nullptr;
}
AbstractMetaType *type = b->translateType(info, metaClass, {}, &typeError);
if (!type) {
const QStringList qualifiedName = info.qualifiedName();
for (int j = scopes.size(); j >= 0 && type == nullptr; --j) {
info.setQualifiedName(scopes.mid(0, j) + qualifiedName);
type = b->translateType(info, metaClass, {}, &typeError);
}
}
if (!type) {
*errorMessage = msgPropertyTypeParsingFailed(ts.name, ts.type, typeError);
return nullptr;
}
return new QPropertySpec(ts, type);
}
// Convenience to create a QPropertySpec from a Q_PROPERTY macro
// via TypeSystemProperty.
QPropertySpec *QPropertySpec::parseQ_Property(AbstractMetaBuilderPrivate *b,
AbstractMetaClass *metaClass,
const QString &declarationIn,
const QStringList &scopes,
QString *errorMessage)
{
const TypeSystemProperty ts =
typeSystemPropertyFromQ_Property(declarationIn, errorMessage);
return ts.isValid()
? fromTypeSystemProperty(b, metaClass, ts, scopes, errorMessage)
: nullptr;
}
#ifndef QT_NO_DEBUG_STREAM
void QPropertySpec::formatDebug(QDebug &d) const
{
d << '#' << m_index << " \"" << m_name << "\" (" << m_type->cppSignature();
d << "), read=" << m_read;
if (!m_write.isEmpty())
d << ", write=" << m_write;
if (!m_reset.isEmpty())
d << ", reset=" << m_reset;
if (!m_designable.isEmpty())
d << ", designable=" << m_designable;
}
QDebug operator<<(QDebug d, const QPropertySpec &p)
{
QDebugStateSaver s(d);
d.noquote();
d.nospace();
d << "QPropertySpec(";
p.formatDebug(d);
d << ')';
return d;
}
#endif // QT_NO_DEBUG_STREAM
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