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- //=============================================================================
- // File: bodypart.h
- // Contents: Declarations for DwBodyPart
- // Maintainer: Doug Sauder <dwsauder@fwb.gulf.net>
- // WWW: http://www.fwb.gulf.net/~dwsauder/mimepp.html
- //
- // Copyright (c) 1996, 1997 Douglas W. Sauder
- // All rights reserved.
- //
- // IN NO EVENT SHALL DOUGLAS W. SAUDER BE LIABLE TO ANY PARTY FOR DIRECT,
- // INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
- // THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF DOUGLAS W. SAUDER
- // HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- //
- // DOUGLAS W. SAUDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT
- // NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- // PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
- // BASIS, AND DOUGLAS W. SAUDER HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
- // SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- //
- //=============================================================================
-
- #ifndef DW_BODYPART_H
- #define DW_BODYPART_H
-
- #ifndef DW_CONFIG_H
- #include <mimelib/config.h>
- #endif
-
- #ifndef DW_STRING_H
- #include <mimelib/string.h>
- #endif
-
- #ifndef DW_ENTITY_H
- #include <mimelib/entity.h>
- #endif
-
- class DwMessage;
- class DwEntity;
- class DwBody;
-
-
- //=============================================================================
- //+ Name DwBodyPart -- Class representing a MIME body-part
- //+ Description
- //. {\tt DwBodyPart} represents a {\it body part}, as described in RFC-2045
- //. and RFC-2046. A body part is an {\it entity}, so it has a collection
- //. of headers and a {\it body}. A body part is different from a {\it message}
- //. in that a body part is part of a multipart body.
- //.
- //. In MIME++, a {\tt DwBodyPart} is a subclass of {\tt DwEntity}; therefore,
- //. it contains both a {\tt DwHeaders} object and a {\tt DwBody} object,
- //. and it is contained in a multipart {\tt DwBody} object.
- //.
- //. As with {\tt DwMessage}, most of the functionality of {\tt DwBodyPart} is
- //. implemented by the abstract class {\tt DwEntity}.
- //=============================================================================
- // Last modified 1997-08-23
- //+ Noentry ~DwBodyPart _PrintDebugInfo mNext sClassName
-
-
- class DW_EXPORT DwBodyPart : public DwEntity {
-
- public:
-
- DwBodyPart();
- DwBodyPart(const DwBodyPart& aPart);
- DwBodyPart(const DwEntity& aPart);
- DwBodyPart(const DwString& aStr, DwMessageComponent* aParent=0);
- //. The first constructor is the default constructor, which sets the
- //. {\tt DwBodyPart} object's string representation to the empty string
- //. and sets its parent to {\tt NULL}.
- //.
- //. The second constructor is the copy constructor, which performs
- //. a deep copy of {\tt aPart}.
- //. The parent of the new {\tt DwBodyPart} object is set to {\tt NULL}.
- //.
- //. The third constructor copies {\tt aStr} to the {\tt DwBodyPart}
- //. object's string representation and sets {\tt aParent} as its parent.
- //. The virtual member function {\tt Parse()} should be called immediately
- //. after this constructor in order to parse the string representation.
- //. Unless it is {\tt NULL}, {\tt aParent} should point to an object of
- //. a class derived from {\tt DwBody}.
-
- virtual ~DwBodyPart();
-
- const DwBodyPart& operator = (const DwBodyPart& aPart);
- //. This is the assignment operator, which performs a deep copy of
- //. {\tt aPart}. The parent node of the {\tt DwBodyPart} object
- //. is not changed.
-
- virtual DwMessageComponent* Clone() const;
- //. This virtual function, inherited from {\tt DwMessageComponent},
- //. creates a new {\tt DwBodyPart} on the free store that has the same
- //. value as this {\tt DwBodyPart} object. The basic idea is that of
- //. a virtual copy constructor.
-
- static DwBodyPart* NewBodyPart(const DwString& aStr,
- DwMessageComponent* aParent);
- //. Creates a new {\tt DwBodyPart} on the free store.
- //. If the static data member {\tt sNewBodyPart} is {\tt NULL},
- //. this member function will create a new {\tt DwBodyPart}
- //. and return it. Otherwise, {\tt NewBodyPart()} will call
- //. the user-supplied function pointed to by {\tt sNewBodyPart},
- //. which is assumed to return an object from a class derived from
- //. {\tt DwBodyPart}, and return that object.
-
- DwBodyPart* Next() const;
- //. This member function returns the next {\tt DwBodyPart} object
- //. following this {\tt DwBodyPart} in the list of {\tt DwBodyPart}
- //. objects contained in a multipart {\tt DwBody}.
-
- void SetNext(const DwBodyPart* aPart);
- //. This advanced function sets {\tt aPart} as the next {\tt DwBodyPart}
- //. object following this {\tt DwBodyPart} in the list of {\tt DwBodyPart}
- //. objects contained in a multipart {\tt DwBody}. Since {\tt DwBody}
- //. contains a member function for adding a {\tt DwBodyPart} object to
- //. its list, this function should be avoided for most applications.
-
- //+ Var sNewBodyPart
- static DwBodyPart* (*sNewBodyPart)(const DwString&, DwMessageComponent*);
- //. If {\tt sNewBodyPart} is not {\tt NULL}, it is assumed to point to a
- //. user-supplied function that returns an object from a class
- //. derived from {\tt DwBodyPart}.
-
- public:
-
- virtual void PrintDebugInfo(std::ostream& aStrm, int aDepth=0) const;
- //. This virtual function, inherited from {\tt DwMessageComponent},
- //. prints debugging information about this object to {\tt aStrm}.
- //. It will also call {\tt PrintDebugInfo()} for any of its child
- //. components down to a level of {\tt aDepth}.
- //.
- //. This member function is available only in the debug version of
- //. the library.
-
- virtual void CheckInvariants() const;
- //. Aborts if one of the invariants of the object fails. Use this
- //. member function to track down bugs.
- //.
- //. This member function is available only in the debug version of
- //. the library.
-
- protected:
-
- void _PrintDebugInfo(std::ostream& aStrm) const;
-
- private:
-
- const DwBodyPart* mNext;
- static const char* const sClassName;
-
- };
-
- #endif
-
-