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/*
Copyright 2014 S. Razi Alavizadeh
Copyright 2014 Adam Reichold
This file is part of qpdfview.
qpdfview is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
qpdfview is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with qpdfview. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SEARCHMODEL_H
#define SEARCHMODEL_H
#include <QAbstractItemModel>
#include <QCache>
#include <QFutureWatcher>
#include <QRectF>
namespace qpdfview
{
class DocumentView;
class SearchModel : public QAbstractItemModel
{
Q_OBJECT
public:
static SearchModel* instance();
~SearchModel();
QModelIndex index(int row, int column, const QModelIndex& parent = QModelIndex()) const;
QModelIndex parent(const QModelIndex& child) const;
int rowCount(const QModelIndex& parent = QModelIndex()) const;
int columnCount(const QModelIndex& parent = QModelIndex()) const;
enum
{
CountRole = Qt::UserRole + 1,
ProgressRole,
PageRole,
RectRole,
TextRole,
MatchCaseRole,
WholeWordsRole,
MatchedTextRole,
SurroundingTextRole
};
QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;
DocumentView* viewForIndex(const QModelIndex& index) const;
bool hasResults(DocumentView* view) const;
bool hasResultsOnPage(DocumentView* view, int page) const;
int numberOfResultsOnPage(DocumentView* view, int page) const;
QList< QRectF > resultsOnPage(DocumentView* view, int page) const;
enum FindDirection
{
FindNext,
FindPrevious
};
QPersistentModelIndex findResult(DocumentView* view, const QPersistentModelIndex& currentResult, int currentPage, FindDirection direction) const;
void insertResults(DocumentView* view, int page, const QList< QRectF >& resultsOnPage);
void clearResults(DocumentView* view);
void updateProgress(DocumentView* view);
protected slots:
void on_fetchSurroundingText_finished();
private:
Q_DISABLE_COPY(SearchModel)
static SearchModel* s_instance;
SearchModel(QObject* parent = 0);
QVector< DocumentView* > m_views;
QModelIndex findView(DocumentView* view) const;
QModelIndex findOrInsertView(DocumentView* view);
typedef QPair< int, QRectF > Result;
typedef QList< Result > Results;
QHash< DocumentView*, Results* > m_results;
typedef QPair< DocumentView*, QByteArray > TextCacheKey;
typedef QPair< QString, QString > TextCacheObject;
struct TextJob
{
TextCacheKey key;
TextCacheObject* object;
TextJob() : key(), object(0) {}
TextJob(const TextCacheKey& key, TextCacheObject* object) : key(key), object(object) {}
};
typedef QFutureWatcher< TextJob > TextWatcher;
mutable QCache< TextCacheKey, TextCacheObject > m_textCache;
mutable QHash< TextCacheKey, TextWatcher* > m_textWatchers;
QString fetchMatchedText(DocumentView* view, const Result& result) const;
QString fetchSurroundingText(DocumentView* view, const Result& result) const;
const TextCacheObject* fetchText(DocumentView* view, const Result& result) const;
static TextCacheKey textCacheKey(DocumentView* view, const Result& result);
static TextJob textJob(const TextCacheKey& key, const Result& result);
};
} // qpdfview
#endif // SEARCHMODEL_H
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