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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the tools applications 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 qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef CODEGENERATOR_H
#define CODEGENERATOR_H
#include <QByteArray>
#include <QString>
#include <QList>
#include <QStack>
namespace CodeGenerator
{
enum GeneratorType {NoopType, CompoundType, TextType, RepeaterType, CounterType, GroupType};
class BaseGenerator;
typedef QStack<BaseGenerator *> GeneratorStack;
template <typename ValueType>
class Stacker {
public:
Stacker(QStack<ValueType> *stack, ValueType value) : stack(stack) { stack->push(value); }
~Stacker() { stack->pop();}
private:
QStack<ValueType> *stack;
};
typedef Stacker<BaseGenerator *> GeneratorStacker;
class BaseGenerator
{
public:
BaseGenerator(GeneratorType type = NoopType) : type(type) {}
virtual ~BaseGenerator() {};
virtual QByteArray generate(GeneratorStack *stack) { Q_UNUSED(stack); return QByteArray(); };
int currentCount(GeneratorStack *stack) const;
int repeatCount(GeneratorStack *stack) const;
GeneratorType type;
};
class Item
{
public:
Item(BaseGenerator * const base) : generator(base) {}
Item(const char * const text);
QByteArray generate() const
{ GeneratorStack stack; return generator->generate(&stack); }
// ### TODO: Fix memory leak!
// QExplicitlySharedDataPointer<BaseGenerator> generator;
BaseGenerator * const generator;
};
class CompoundGenerator : public BaseGenerator
{
public:
CompoundGenerator(BaseGenerator * const a, BaseGenerator * const b)
: BaseGenerator(CompoundType), a(a), b(b) {}
virtual QByteArray generate(GeneratorStack *stack)
{ return a->generate(stack) + b->generate(stack); };
protected:
BaseGenerator * const a;
BaseGenerator * const b;
};
class Compound : public Item
{
public:
Compound(const Item &a, const Item &b) : Item(new CompoundGenerator(a.generator, b.generator)) {}
};
class TextGenerator : public BaseGenerator
{
public:
TextGenerator(const QByteArray &text) : BaseGenerator(TextType), text(text) {}
virtual QByteArray generate(GeneratorStack *) { return text; };
protected:
QByteArray text;
};
class Text : public Item {
public:
Text(const QByteArray &text) : Item(new TextGenerator(text)) {}
Text(const char * const text) : Item(new TextGenerator(QByteArray(text))) {}
};
class RepeaterGenerator : public BaseGenerator
{
public:
RepeaterGenerator(BaseGenerator * const childGenerator)
: BaseGenerator(RepeaterType), repeatCount(1), repeatOffset(0), childGenerator(childGenerator) {}
virtual QByteArray generate(GeneratorStack *stack);
int repeatCount;
int repeatOffset;
int currentRepeat;
BaseGenerator * const childGenerator;
};
class Repeater : public Item {
public:
Repeater(const Item &item) : Item(new RepeaterGenerator(item.generator)) {}
void setRepeatCount(int count)
{ static_cast<RepeaterGenerator * const>(generator)->repeatCount = count; }
void setRepeatOffset(int offset)
{ static_cast<RepeaterGenerator * const>(generator)->repeatOffset = offset; }
};
class CounterGenerator : public BaseGenerator
{
public:
CounterGenerator() : BaseGenerator(CounterType), offset(0), increment(1), reverse(false) {}
QByteArray generate(GeneratorStack *stack)
{
if (reverse)
return QByteArray::number(repeatCount(stack) - (currentCount(stack) * increment) + offset + 1);
else
return QByteArray::number((currentCount(stack) * increment) + offset);
}
int offset;
int increment;
bool reverse;
};
class Counter : public Item {
public:
Counter() : Item(new CounterGenerator()) {}
Counter(int offset) : Item(new CounterGenerator()) { setOffset(offset); }
void setOffset(int offset)
{ static_cast<CounterGenerator *>(generator)->offset = offset; }
void setIncrement(int increment)
{ static_cast<CounterGenerator *>(generator)->increment = increment; }
void setReverse(bool reverse)
{ static_cast<CounterGenerator *>(generator)->reverse = reverse; }
};
class GroupGenerator : public BaseGenerator
{
public:
GroupGenerator(BaseGenerator * const childGenerator)
: BaseGenerator(GroupType), currentRepeat(0), childGenerator(childGenerator),
separator(new BaseGenerator()), prefix(new BaseGenerator()), postfix(new BaseGenerator()) { }
virtual QByteArray generate(GeneratorStack *stack);
int currentRepeat;
BaseGenerator * const childGenerator;
BaseGenerator *separator;
BaseGenerator *prefix;
BaseGenerator *postfix;
};
class Group : public Item
{
public:
Group(const Item &item) : Item(new GroupGenerator(item.generator)) { setSeparator(", "); }
void setSeparator(const Item &separator)
{ static_cast<GroupGenerator *>(generator)->separator = separator.generator; }
void setPrefix(const Item &prefix)
{ static_cast<GroupGenerator *>(generator)->prefix = prefix.generator; }
void setPostfix(const Item &postfix)
{ static_cast<GroupGenerator *>(generator)->postfix = postfix.generator; }
};
const Compound operator+(const Item &a, const Item &b);
const Compound operator+(const Item &a, const char * const text);
const Compound operator+(const char * const text, const Item &b);
} //namespace CodeGenerator
#endif
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