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101 lines
4.2 KiB
C++
101 lines
4.2 KiB
C++
/**
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* Copyright (C) 2004 Scott Wheeler <wheeler@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FILEHANDLEPROPERTIES_H
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#define FILEHANDLEPROPERTIES_H
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#include <QMap>
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#include <QStringList>
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/*
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* These ugly macros make possible a property registration system that makes it
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* easy to add properties to the FileHandle that can be accessed via the DCOP
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* interface.
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*
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* Properties should actually be added to the filehandle.cpp file. This file
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* is just here to separate out some of the macro-related ugliness.
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*/
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#define AddProperty(name, method) \
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namespace FileHandleProperties \
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{ \
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struct name##Property : public Property \
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{ \
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virtual QString value(const FileHandle &f) const \
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{ \
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return f.method; \
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} \
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static const int dummy; \
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}; \
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static name##Property name##Instance; \
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const int name##Property::dummy = addToPropertyMap(#name, &name##Instance); \
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}
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#define AddNumberProperty(name, method) \
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namespace FileHandleProperties \
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{ \
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struct name##Property : public Property \
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{ \
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virtual QString value(const FileHandle &f) const \
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{ \
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return QString::number(f.method); \
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} \
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static const int dummy; \
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}; \
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static name##Property name##Instance; \
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const int name##Property::dummy = addToPropertyMap(#name, &name##Instance); \
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}
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namespace FileHandleProperties
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{
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struct Property
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{
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virtual ~Property() {}
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virtual QString value(const FileHandle &) const
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{
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return QString();
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}
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};
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static QMap<QByteArray, const Property *> propertyMap;
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static int addToPropertyMap(const QByteArray &name, Property *property)
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{
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propertyMap[name] = property;
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return 0;
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}
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static QString property(const FileHandle &file, const QByteArray &key)
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{
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return propertyMap.contains(key) ? propertyMap[key]->value(file) : QString();
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}
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static QStringList properties()
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{
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static QStringList l;
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if(l.isEmpty()) {
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QMap<QByteArray, const Property *>::ConstIterator it = propertyMap.constBegin();
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for(; it != propertyMap.constEnd(); ++it)
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l.append(QString(it.key()));
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}
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return l;
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}
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}
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#endif
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// vim: set et sw=4 tw=0 sta:
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