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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qscriptstring.h"
#include "qscriptstring_p.h"
#include "qscriptnameid_p.h"
#include "qscriptvalue_p.h"
#include "qscriptengine_p.h"
#include "qscriptvalueimpl_p.h"
#include "qscriptcontext_p.h"
#include "qscriptmember_p.h"
#include "qscriptobject_p.h"
QT_BEGIN_NAMESPACE
/*!
\since 4.4
\class QScriptString
\brief The QScriptString class acts as a handle to "interned" strings in a QScriptEngine.
\ingroup script
\mainclass
QScriptString can be used to achieve faster (repeated)
property getting/setting, and comparison of property names, of
script objects.
To get a QScriptString representation of a string, pass the string
to QScriptEngine::toStringHandle(). The typical usage pattern is to
register one or more pre-defined strings when setting up your script
environment, then subsequently use the relevant QScriptString as
argument to e.g. QScriptValue::property().
Call the toString() function to obtain the string that a
QScriptString represents.
*/
/*!
\internal
*/
QScriptStringPrivate::QScriptStringPrivate()
: nameId(0), engine(0), q_ptr(0)
{
ref = 0;
}
/*!
\internal
*/
QScriptStringPrivate *QScriptStringPrivate::create()
{
return new QScriptStringPrivate();
}
/*!
\internal
*/
QScriptStringPrivate *QScriptStringPrivate::get(const QScriptString &q)
{
return const_cast<QScriptStringPrivate*>(q.d_func());
}
/*!
\internal
*/
void QScriptStringPrivate::init(QScriptString &q, QScriptStringPrivate *d)
{
Q_ASSERT(q.d_ptr == 0);
q.d_ptr = d;
q.d_ptr->ref.ref();
}
/*!
Constructs an invalid QScriptString.
*/
QScriptString::QScriptString()
: d_ptr(0)
{
}
/*!
Constructs a new QScriptString that is a copy of \a other.
*/
QScriptString::QScriptString(const QScriptString &other)
: d_ptr(other.d_ptr)
{
if (d_ptr)
d_ptr->ref.ref();
}
/*!
Destroys this QScriptString.
*/
QScriptString::~QScriptString()
{
if (d_ptr && !d_ptr->ref.deref()) {
if (isValid()) {
d_ptr->engine->uninternString(d_ptr);
} else {
// the engine has already been deleted
delete d_ptr;
}
d_ptr = 0;
}
}
/*!
Assigns the \a other value to this QScriptString.
*/
QScriptString &QScriptString::operator=(const QScriptString &other)
{
if (d_ptr == other.d_ptr)
return *this;
if (d_ptr && !d_ptr->ref.deref()) {
if (isValid()) {
d_ptr->engine->uninternString(d_ptr);
} else {
// the engine has already been deleted
delete d_ptr;
}
}
d_ptr = other.d_ptr;
if (d_ptr)
d_ptr->ref.ref();
return *this;
}
/*!
Returns true if this QScriptString is valid; otherwise
returns false.
*/
bool QScriptString::isValid() const
{
Q_D(const QScriptString);
return (d && d->nameId);
}
/*!
Returns true if this QScriptString is equal to \a other;
otherwise returns false.
*/
bool QScriptString::operator==(const QScriptString &other) const
{
Q_D(const QScriptString);
return (d == other.d_func());
}
/*!
Returns true if this QScriptString is not equal to \a other;
otherwise returns false.
*/
bool QScriptString::operator!=(const QScriptString &other) const
{
Q_D(const QScriptString);
return (d != other.d_func());
}
/*!
Returns the string that this QScriptString represents, or a
null string if this QScriptString is not valid.
\sa isValid()
*/
QString QScriptString::toString() const
{
Q_D(const QScriptString);
if (!d || !d->nameId)
return QString();
return d->nameId->s;
}
/*!
Returns the string that this QScriptString represents, or a
null string if this QScriptString is not valid.
\sa toString()
*/
QScriptString::operator QString() const
{
return toString();
}
QT_END_NAMESPACE
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