You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
351 lines
10 KiB
351 lines
10 KiB
/*
|
|
kopeteproperties.h - Kopete Properties
|
|
|
|
Copyright (c) 2004 by Richard Smith <kde@metafoo.co.uk>
|
|
Kopete (c) 2002-2004 by the Kopete developers <kopete-devel@kde.org>
|
|
|
|
*************************************************************************
|
|
* *
|
|
* This library is free software; you can redistribute it and/or *
|
|
* modify it under the terms of the GNU Lesser General Public *
|
|
* License as published by the Free Software Foundation; either *
|
|
* version 2 of the License, or (at your option) any later version. *
|
|
* *
|
|
*************************************************************************
|
|
*/
|
|
|
|
#ifndef KOPETEPROPERTIES_H
|
|
#define KOPETEPROPERTIES_H
|
|
|
|
#include <tqasciidict.h>
|
|
|
|
#include <typeinfo>
|
|
|
|
class TQString;
|
|
class TQVariant;
|
|
class TQDomElement;
|
|
|
|
namespace Kopete
|
|
{
|
|
|
|
/**
|
|
* Contains the classes forming Kopete's Properties system.
|
|
*
|
|
* @todo Explain more, give examples.
|
|
*
|
|
* @author Richard Smith <kde@metafoo.co.uk>
|
|
*/
|
|
namespace Properties
|
|
{
|
|
|
|
//BEGIN core functionality
|
|
|
|
/**
|
|
* @brief Property-type-independent base class for properties
|
|
*
|
|
* The base class for all properties of any type which can be set or got for @p Parent
|
|
* objects. It is rare to need to use this class directly. Usually you will want to use
|
|
* the @ref Property derived class, or dynamic_cast the PropertyBase object to another interface.
|
|
*
|
|
* @see Property UserVisible XMLSerializable StringSerializable
|
|
*
|
|
* @author Richard Smith <kde@metafoo.co.uk>
|
|
*/
|
|
template<class Parent>
|
|
class PropertyBase
|
|
{
|
|
public:
|
|
/**
|
|
* Returns the name of the property. This name should uniquely identify this property
|
|
* within the type Parent, and will be used for persistently identifying this property.
|
|
*
|
|
* For core properties, the chosen name should not contain any slash characters. For
|
|
* properties defined in plugins kept in Kopete's CVS, the name should be of the form
|
|
* pluginName/propertyName. For third-party plugins, please use a URL with a host which
|
|
* you own, such as "http://my-host.com/kopete/properties/groupId".
|
|
*
|
|
* @return the name of this property.
|
|
*/
|
|
virtual const char *name() const = 0;
|
|
};
|
|
|
|
/**
|
|
* @brief Property-type-dependent base class for properties
|
|
*
|
|
* This class represents a property of type @p Type applicable to @p Parent objects. Usage
|
|
* of this class is usually as simple as:
|
|
*
|
|
* \code
|
|
* SomeParent *propertyContainer = ...
|
|
* Property<SomeParent,TQString> &myProperty = ...
|
|
* TQString value = propertyContainer->property(myProperty);
|
|
* propertyContainer->setProperty(myProperty, "hello");
|
|
* \endcode
|
|
*
|
|
* You should never need to call functions in this class directly.
|
|
*/
|
|
template<class Parent, typename Type>
|
|
class Property : public PropertyBase<Parent>
|
|
{
|
|
public:
|
|
/**
|
|
* Returns the value of this property in the object @p parent.
|
|
*/
|
|
virtual Type get( const Parent *parent ) const = 0;
|
|
/**
|
|
* Sets the value of this property in the object @p parent.
|
|
*/
|
|
virtual void set( Parent *, const Type & ) const = 0;
|
|
};
|
|
|
|
/**
|
|
* @brief Base class for property data objects
|
|
*
|
|
* Some property objects want to store property-specific data in their parent objects.
|
|
* To support that, subclasses of this class are permitted to be stored. Once passed
|
|
* to the @ref PropertyStorage object via @ref PropertyStorage::setCustomPropertyData,
|
|
* the @ref PropertyStorage object owns the PropertyData, and will delete it when it
|
|
* is no longer needed.
|
|
*/
|
|
struct PropertyData
|
|
{
|
|
virtual ~PropertyData() {}
|
|
};
|
|
|
|
/**
|
|
* @brief Storage object for PropertyData objects
|
|
*
|
|
* This class is responsible for storing PropertyData-derived data objects for properties.
|
|
* This is the non-templated part of the @ref WithProperties class, split out into its own
|
|
* class to eliminate the template bloat.
|
|
*/
|
|
class PropertyStorage
|
|
{
|
|
typedef TQAsciiDict<PropertyData> PropertyDict;
|
|
// setCustomPropertyData can be called on a const object, allowing the
|
|
// guarantee that DataProperty::data() never returns 0.
|
|
mutable PropertyDict _storage;
|
|
|
|
public:
|
|
PropertyStorage() { _storage.setAutoDelete( true ); }
|
|
|
|
/**
|
|
* Sets the stored property data with name @p name to be @p data.
|
|
*
|
|
* @note The @p name argument should usually be the name of the property which the data
|
|
* is being stored for. However, if properties wish to share data, they may choose to
|
|
* name their custom data differently. Names are bound by the same rules as are laid out
|
|
* for naming properties in PropertyBase<Parent>::name.
|
|
*/
|
|
void setCustomPropertyData( const char *name, PropertyData *data ) const { _storage.replace( name, data ); }
|
|
|
|
/**
|
|
* Gets the stored property data with name @p name. Returns a null
|
|
* pointer if no data has been stored for that property.
|
|
*/
|
|
PropertyData *getCustomPropertyData( const char *name ) const { return _storage[name]; }
|
|
};
|
|
|
|
/**
|
|
* @brief Base class for classes to which properties can be applied
|
|
*
|
|
* This class provides support for properties to another class. If you want your class
|
|
* to support properties, derive from this passing your class as the Parent parameter:
|
|
*
|
|
* \code
|
|
* class YourClass : public WithProperties<YourClass> { ... };
|
|
* \endcode
|
|
*
|
|
* You will also need to explicitly specialise the propertyCreated() member function to
|
|
* load property data upon creation of a new property object.
|
|
*/
|
|
template<class Parent>
|
|
class WithProperties : public PropertyStorage
|
|
{
|
|
public:
|
|
/**
|
|
* Get the value of property @p prop in this object.
|
|
* @param prop the Property object representing the property to get
|
|
*/
|
|
template<typename T>
|
|
T property( Property<Parent,T> const &prop ) { return prop.get( static_cast<Parent*>(this) ); }
|
|
/**
|
|
* Set the value of property @p prop in this object.
|
|
* @param prop the Property object representing the property to get
|
|
* @param value the value to set the property to
|
|
*/
|
|
template<typename T>
|
|
void setProperty( Property<Parent,T> const &prop, const T &value ) { prop.set( static_cast<Parent*>(this), value ); }
|
|
|
|
/**
|
|
* Called when a property is created; loads the Parent object's data into the property.
|
|
*
|
|
* @note Derived classes must explicitly specialize this to load the property's data into
|
|
* every object of this type.
|
|
*/
|
|
static void propertyCreated( const PropertyBase<Parent> &property );
|
|
};
|
|
|
|
//END core functionality
|
|
|
|
//BEGIN interfaces
|
|
|
|
/**
|
|
* @brief An interface for user-visible properties
|
|
* @todo document
|
|
*/
|
|
template<class Parent>
|
|
struct UserVisible
|
|
{
|
|
virtual TQString userText( Parent * ) = 0;
|
|
virtual TQString label() = 0;
|
|
virtual TQString icon() = 0;
|
|
};
|
|
|
|
/**
|
|
* @brief An interface for properties which can be serialized as XML
|
|
* @todo document
|
|
*/
|
|
template<class Parent>
|
|
struct XMLSerializable
|
|
{
|
|
virtual void fromXML( Parent *, const TQDomElement & ) = 0;
|
|
virtual void toXML( const Parent *, TQDomElement & ) = 0;
|
|
};
|
|
|
|
/**
|
|
* @brief An interface for properties which can be serialized as strings
|
|
* @todo document
|
|
*/
|
|
template<class Parent>
|
|
struct StringSerializable
|
|
{
|
|
virtual void fromString( Parent *, const TQString & ) = 0;
|
|
virtual TQString toString( const Parent * ) = 0;
|
|
};
|
|
|
|
//END interfaces
|
|
|
|
//BEGIN convenience classes
|
|
|
|
/**
|
|
* @internal Display a warning message when the wrong type of property data is found
|
|
*/
|
|
void customPropertyDataIncorrectType( const char *name, const std::type_info &found, const std::type_info &expected );
|
|
|
|
/**
|
|
* @brief Convenience implementation of a Property that stores PropertyData
|
|
*
|
|
* A property for objects of type @p Parent, that stores data in the class @p Data.
|
|
* @p Data must be derived from @ref PropertyBase, or your code will not compile.
|
|
*/
|
|
template<class Parent, typename Type, class Data>
|
|
class DataProperty : public Property<Parent,Type>
|
|
{
|
|
public:
|
|
Data *data( const Parent *c ) const
|
|
{
|
|
PropertyData *pd = c->getCustomPropertyData( this->name() );
|
|
Data *data = dynamic_cast<Data*>(pd);
|
|
if ( !data )
|
|
{
|
|
if ( pd )
|
|
customPropertyDataIncorrectType( this->name(), typeid(*pd), typeid(Data) );
|
|
data = new Data;
|
|
c->setCustomPropertyData( this->name(), data );
|
|
}
|
|
return data;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @brief Convenience implementation of a PropertyData subclass which stores a single datum
|
|
*
|
|
* If a @ref Property needs to store only a single value in an object, using this
|
|
* class is simpler than deriving from @ref PropertyData yourself. The value will
|
|
* be default-constructed (which means for numeric types and pointers it will be
|
|
* set to 0).
|
|
*/
|
|
template<typename T>
|
|
struct SimplePropertyData : public PropertyData
|
|
{
|
|
SimplePropertyData() : value() {}
|
|
T value;
|
|
};
|
|
|
|
/**
|
|
* @brief Convenience implementation of a Property which stores a single datum as PropertyData
|
|
*
|
|
* This convenience class implements the @ref Property interface by simply storing and
|
|
* retrieving the datum from PropertyData. This class does not provide any serialization
|
|
* of the data.
|
|
*
|
|
* @note You will need to derive from this class to use it; the @ref name function is
|
|
* still pure virtual.
|
|
*/
|
|
template<class Parent, typename Type>
|
|
class SimpleDataProperty : public DataProperty<Parent,Type,SimplePropertyData<Type> >
|
|
{
|
|
public:
|
|
Type get( const Parent *p ) const { return data(p)->value; }
|
|
void set( Parent *p, const Type &v ) const { data(p)->value = v; }
|
|
};
|
|
|
|
/**
|
|
* Move somewhere else
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* Explicitly specialised for all types TQVariant supports
|
|
*/
|
|
template<class T> T variantTo(TQVariant);
|
|
|
|
TQVariant variantFromXML(const TQDomElement&);
|
|
void variantToXML(TQVariant v, TQDomElement &);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @brief Convenience implementation of XMLSerializable in terms of QVariants
|
|
*
|
|
* This class provides XML serialization for data that can be stored in a TQVariant. You
|
|
* will need to multiply-inherit from this class and (usually indirectly) from @ref Property.
|
|
*
|
|
* You can combine this class with other convenience classes such as SimpleDataProperty
|
|
* like this:
|
|
*
|
|
* \code
|
|
* class ContactNickNameProperty
|
|
* : public SimpleDataProperty<Contact,TQString>
|
|
* , XMLProperty<ContactNickNameProperty,Contact,TQString>
|
|
* {
|
|
* public:
|
|
* const char *name() const { return "nickName"; }
|
|
* };
|
|
* \endcode
|
|
*/
|
|
template<class Derived, class Parent, typename Type>
|
|
class XMLProperty : public XMLSerializable<Parent>
|
|
{
|
|
public:
|
|
void fromXML( Parent *t, const TQDomElement &e )
|
|
{
|
|
static_cast<Derived*>(this)->set(t, variantTo<Type>(variantFromXML(e)));
|
|
}
|
|
void toXML( const Parent *t, TQDomElement &e )
|
|
{
|
|
variantToXML(TQVariant(static_cast<Derived*>(this)->get(t)),e);
|
|
}
|
|
};
|
|
|
|
//END convenience classes
|
|
|
|
} // namespace Properties
|
|
|
|
} // namespace Kopete
|
|
|
|
#endif
|