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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Copyright (C) 2012 Instituto Nokia de Tecnologia (INdT)
** Contact: http://www.qt-project.org/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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 1.1, 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef UICOMPLETIONMODEL_P_H
#define UICOMPLETIONMODEL_P_H
#ifndef QT_NO_COMPLETIONMODEL
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "private/qobject_p.h"
#include "uicompletionmodel.h"
#include "private/qabstractproxymodel_p.h"
#include "QtCore/qstringlist.h"
QT_BEGIN_NAMESPACE_UIHELPERS
class QIndexMapper
{
public:
QIndexMapper() : v(false), f(0), t(-1) { }
QIndexMapper(int f, int t) : v(false), f(f), t(t) { }
QIndexMapper(QVector<int> vec) : v(true), vector(vec), f(-1), t(-1) { }
inline int count() const { return v ? vector.count() : t - f + 1; }
inline int operator[] (int index) const { return v ? vector[index] : f + index; }
inline int indexOf(int x) const { return v ? vector.indexOf(x) : ((t < f) ? -1 : x - f); }
inline bool isValid() const { return !isEmpty(); }
inline bool isEmpty() const { return v ? vector.isEmpty() : (t < f); }
inline void append(int x) { Q_ASSERT(v); vector.append(x); }
inline int first() const { return v ? vector.first() : f; }
inline int last() const { return v ? vector.last() : t; }
inline int from() const { Q_ASSERT(!v); return f; }
inline int to() const { Q_ASSERT(!v); return t; }
inline int cost() const { return vector.count()+2; }
private:
bool v;
QVector<int> vector;
int f, t;
};
struct QMatchData {
QMatchData() : exactMatchIndex(-1) { }
QMatchData(const QIndexMapper& indices, int em, bool p) :
indices(indices), exactMatchIndex(em), partial(p) { }
QIndexMapper indices;
inline bool isValid() const { return indices.isValid(); }
int exactMatchIndex;
bool partial;
};
class UiCompletionEngine
{
public:
typedef QMap<QString, QMatchData> CacheItem;
typedef QMap<QModelIndex, CacheItem> Cache;
UiCompletionEngine(UiCompletionModelPrivate *c) : c(c), curRow(-1), cost(0) { }
virtual ~UiCompletionEngine() { }
void filter(const QStringList &parts);
QMatchData filterHistory();
bool matchHint(QString, const QModelIndex&, QMatchData*);
void saveInCache(QString, const QModelIndex&, const QMatchData&);
bool lookupCache(QString part, const QModelIndex& parent, QMatchData *m);
virtual void filterOnDemand(int) { }
virtual QMatchData filter(const QString&, const QModelIndex&, int) = 0;
int matchCount() const { return curMatch.indices.count() + historyMatch.indices.count(); }
QMatchData curMatch, historyMatch;
UiCompletionModelPrivate *c;
QStringList curParts;
QModelIndex curParent;
int curRow;
Cache cache;
int cost;
};
class QSortedModelEngine : public UiCompletionEngine
{
public:
QSortedModelEngine(UiCompletionModelPrivate *c) : UiCompletionEngine(c) { }
QMatchData filter(const QString&, const QModelIndex&, int);
QIndexMapper indexHint(QString, const QModelIndex&, Qt::SortOrder);
Qt::SortOrder sortOrder(const QModelIndex&) const;
};
class QUnsortedModelEngine : public UiCompletionEngine
{
public:
QUnsortedModelEngine(UiCompletionModelPrivate *c) : UiCompletionEngine(c) { }
void filterOnDemand(int);
QMatchData filter(const QString&, const QModelIndex&, int);
private:
int buildIndices(const QString& str, const QModelIndex& parent, int n,
const QIndexMapper& iv, QMatchData* m);
};
class UiCompletionModelPrivate : public QAbstractProxyModelPrivate
{
Q_DECLARE_PUBLIC(UiCompletionModel)
public:
UiCompletionModelPrivate(UiCompletionModel *model) :
proxy(model), showAll(false), cs(Qt::CaseSensitive), role(Qt::EditRole), column(0), sorting(UiCompletionModel::UnsortedModel) { }
UiCompletionModel *proxy;
bool showAll;
QString prefix;
Qt::CaseSensitivity cs;
int role;
int column;
UiCompletionModel::ModelSorting sorting;
QScopedPointer<UiCompletionEngine> engine;
};
QT_END_NAMESPACE_UIHELPERS
#endif // QT_NO_COMPLETIONMODEL
#endif // UICOMPLETIONMODEL_P_H
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