qgslocatorfilter.h

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/***************************************************************************
                         qgslocatorfilter.h
                         ------------------
    begin                : May 2017
    copyright            : (C) 2017 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 QGSLOCATORFILTER_H
#define QGSLOCATORFILTER_H

#include "qgis_core.h"
#include "qgslocatorcontext.h"
#include "qgslogger.h"
#include <QString>
#include <QVariant>
#include <QIcon>

class QgsFeedback;
class QgsLocatorFilter;

class CORE_EXPORT QgsLocatorResult
{
  public:

    QgsLocatorResult() = default;

    QgsLocatorResult( QgsLocatorFilter *filter, const QString &displayString, const QVariant &userData = QVariant() )
      : filter( filter )
      , displayString( displayString )
      , userData( userData )
    {}

    QgsLocatorFilter *filter = nullptr;

    QString displayString;

    QString description;

    QVariant userData;

    QIcon icon;

    double score = 0.5;

    QString group = QString();

};

class CORE_EXPORT QgsLocatorFilter : public QObject
{
    Q_OBJECT

  public:

    enum Priority
    {
      Highest, 
      High, 
      Medium, 
      Low, 
      Lowest 
    };
    Q_ENUM( Priority )

    
    enum Flag
    {
      FlagFast = 1 << 1, 
    };
    Q_DECLARE_FLAGS( Flags, Flag )
    Q_FLAG( Flags )

    
    QgsLocatorFilter( QObject *parent = nullptr );

    virtual QgsLocatorFilter *clone() const = 0 SIP_FACTORY;

    virtual QString name() const = 0;

    virtual QString displayName() const = 0;

    virtual QgsLocatorFilter::Flags flags() const;

    virtual Priority priority() const { return Medium; }

    virtual QString prefix() const { return QString(); }

    virtual void prepare( const QString &string, const QgsLocatorContext &context ) { Q_UNUSED( string ); Q_UNUSED( context ); }

    virtual void fetchResults( const QString &string, const QgsLocatorContext &context, QgsFeedback *feedback ) = 0;

    virtual void triggerResult( const QgsLocatorResult &result ) = 0;

    virtual void clearPreviousResults() {}

    bool useWithoutPrefix() const;

    void setUseWithoutPrefix( bool useWithoutPrefix );

    QString activePrefix() const;

    void setActivePrefix( const QString &activePrefix ) SIP_SKIP;

    static bool stringMatches( const QString &candidate, const QString &search );

    bool enabled() const;

    void setEnabled( bool enabled );

    virtual bool hasConfigWidget() const;

    virtual void openConfigWidget( QWidget *parent = nullptr );

    void logMessage( const QString &message, Qgis::MessageLevel level = Qgis::Info );


  signals:

    void finished();

    void resultFetched( const QgsLocatorResult &result );

  private:

    bool mEnabled = true;
    bool mUseWithoutPrefix = true;
    QString mActivePrefifx = QString();

};

Q_DECLARE_METATYPE( QgsLocatorResult )
Q_DECLARE_OPERATORS_FOR_FLAGS( QgsLocatorFilter::Flags )


#endif // QGSLOCATORFILTER_H