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Diffstat (limited to 'src/script/api/qscriptstring.cpp')
| -rw-r--r-- | src/script/api/qscriptstring.cpp | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/script/api/qscriptstring.cpp b/src/script/api/qscriptstring.cpp new file mode 100644 index 0000000..41593d2 --- /dev/null +++ b/src/script/api/qscriptstring.cpp @@ -0,0 +1,219 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtScript module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://qt.nokia.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "config.h" +#include "qscriptstring.h" + +#include "qscriptstring_p.h" + +QT_BEGIN_NAMESPACE + +/*! \internal */ +struct QScriptStringPrivatePointerDeleter +{ + static inline void cleanup(QScriptStringPrivate *d) + { + if (!d || d->ref.deref()) + return; + + if (d->nameId) { + d->engine->uninternString(d); + } else { + // the engine has already been deleted + delete d; + } + } +}; + +/*! + \since 4.4 + \class QScriptString + + \brief The QScriptString class acts as a handle to "interned" strings in a QScriptEngine. + + \ingroup script + + + 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() +{ + ref = 0; +} + +/*! + \internal +*/ +QScriptStringPrivate::~QScriptStringPrivate() +{ +} + +/*! + \internal +*/ +void QScriptStringPrivate::init(QScriptString &q, QScriptEngine *engine, const JSC::Identifier &value) +{ + Q_ASSERT(!q.isValid()); + q.d_ptr.data_ptr() = new QScriptStringPrivate(); + q.d_ptr->identifier = value; + q.d_ptr->engine = engine; + 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.data()) +{ + if (d_ptr) + d_ptr->ref.ref(); +} + +/*! + Destroys this QScriptString. +*/ +QScriptString::~QScriptString() +{ +} + +/*! + 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()) { + delete d_ptr; + } + d_ptr.reset(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->engine); +} + +/*! + Returns true if this QScriptString is equal to \a other; + otherwise returns false. +*/ +bool QScriptString::operator==(const QScriptString &other) const +{ + Q_D(const QScriptString); + if (d == other.d_func()) + return true; + if (!d || !other.d_func()) + return false; + if (d->engine != other.d_func()->engine) + return false; + if (!d->engine) + return true; + return d->identifier == other.d_func()->identifier; +} + +/*! + Returns true if this QScriptString is not equal to \a other; + otherwise returns false. +*/ +bool QScriptString::operator!=(const QScriptString &other) const +{ + return !operator==(other); +} + +/*! + 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->engine) + return QString(); + return d->identifier.ustring(); +} + +/*! + 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 |