/usr/include/qgis/qgsexpressionfieldbuffer.h is in libqgis-dev 2.8.6+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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qgsexpressionfieldbuffer.h
---------------------------
begin : May 27, 2014
copyright : (C) 2014 by Matthias Kuhn
email : matthias dot kuhn at gmx dot ch
***************************************************************************/
/***************************************************************************
* *
* This program 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. *
* *
***************************************************************************/
#ifndef QGSEXPRESSIONFIELDBUFFER_H
#define QGSEXPRESSIONFIELDBUFFER_H
#include <QString>
#include <QList>
#include <QDomNode>
#include "qgsfield.h"
/**
* Buffers information about expression fields for a vector layer.
*
* @note added in 2.6
*/
class CORE_EXPORT QgsExpressionFieldBuffer
{
public:
typedef struct ExpressionField
{
ExpressionField() {}
ExpressionField( QString exp, QgsField fld ) : expression( exp ), field( fld ) {}
QString expression;
QgsField field;
} ExpressionField;
QgsExpressionFieldBuffer();
/**
* Add an expression to the buffer
*
* @param exp expression to add
* @param fld field to add
*/
void addExpression( const QString& exp, const QgsField& fld );
/**
* Remove an expression from the buffer
*
* @param index index of expression to remove
*/
void removeExpression( int index );
/**
* Saves expressions to xml under the layer node
*/
void writeXml( QDomNode& layer_node, QDomDocument& document ) const;
/**
* Reads expressions from project file
*/
void readXml( const QDomNode& layer_node );
/**
* Adds fields with the expressions buffered in this object to a QgsFields object
*
* @param flds The fields to be updated
*/
void updateFields( QgsFields& flds );
const QList<ExpressionField> expressions() const { return mExpressions; }
private:
QList<ExpressionField> mExpressions;
};
#endif // QGSEXPRESSIONFIELDBUFFER_H
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