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- //=============================================================================
- // File: fieldbdy.h
- // Contents: Declarations for DwFieldBody
- // 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_FIELDBDY_H
- #define DW_FIELDBDY_H
-
- #include <iostream>
-
- #ifndef DW_CONFIG_H
- #include <mimelib/config.h>
- #endif
-
- #ifndef DW_STRING_H
- #include <mimelib/string.h>
- #endif
-
- #ifndef DW_MSGCMP_H
- #include <mimelib/msgcmp.h>
- #endif
-
- //=============================================================================
- //+ Name DwFieldBody -- Class representing a MIME header field body
- //+ Description
- //. {\tt DwFieldBody} represents the field-body element in the BNF grammar
- //. specified by RFC-822. It is an abstract base class that defines the
- //. interface common to all structured field bodies.
- //.
- //. In the tree (broken-down) representation of a message, a {\tt DwFieldBody}
- //. object may be either a leaf node, having a parent but no child nodes, or
- //. an intermediate node, having a parent and one or more child nodes. The
- //. parent node is the {\tt DwField} object that contains it. Child nodes,
- //. if present, depend on the particular subclass of {\tt DwFieldBody} that
- //. is instantiated. A {\tt DwAddressList} object, for example, has
- //. {\tt DwAddress} objects as its child nodes.
- //.
- //. Since {\tt DwFieldBody} is an abstract base class, you cannot create
- //. instances of it directly. Normally, objects of classes derived from
- //. {\tt DwFieldBody} are obtained by calling convenience member functions
- //. in the class {\tt DwHeaders}.
- //.
- //. Some MIME parsers are broken in that they do not handle the folding of
- //. some fields properly. {\tt DwFieldBody} folds its string representation
- //. by default. You can disable folding, however, by calling the
- //. {\tt SetFolding()} member function. To determine if folding is enabled,
- //. call {\tt IsFolding()}.
- //=============================================================================
- // Last updated 1997-08-24
- //+ Noentry ~DwFieldBody mLineOffset mDoFolding _PrintDebugInfo
-
-
- class DW_EXPORT DwFieldBody : public DwMessageComponent {
-
- friend class DwField;
-
- public:
-
- DwFieldBody();
- DwFieldBody(const DwFieldBody& aFieldBody);
- DwFieldBody(const DwString& aStr, DwMessageComponent* aParent=0);
- //. The first constructor is the default constructor, which sets the
- //. {\tt DwFieldBody} 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 aFieldBody}.
- //. The parent of the new {\tt DwFieldBody} object is set to {\tt NULL}.
- //.
- //. The third constructor copies {\tt aStr} to the {\tt DwFieldBody}
- //. 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 DwField}.
-
- virtual ~DwFieldBody();
-
- const DwFieldBody& operator = (const DwFieldBody& aFieldBody);
- //. This is the assignment operator, which performs a deep copy of
- //. {\tt aFieldBody}. The parent node of the {\tt DwFieldBody} object
- //. is not changed.
-
- void SetOffset(int aOffset);
- //. Sets the offset to {\tt aOffset}. The offset is used when folding
- //. lines. It indicates how much the first line should be offset to
- //. account for the field name, colon, and initial white space.
-
- void SetFolding(DwBool aTrueOrFalse);
- //. Enables ({\tt aTrueOrFalse = DwTrue}) or disables
- //. ({\tt aTrueOrFalse = DwFalse}) the folding of fields. The default
- //. is to fold fields. Unfortunately, some parsers are broke and
- //. do not handle folded lines properly. This function allows a kludge
- //. to deal with these broken parsers.
-
- DwBool IsFolding() const;
- //. Returns a boolean indicating if folding of fields is enabled.
-
- protected:
-
- int mLineOffset;
- DwBool mDoFolding;
-
- private:
-
- static const char* const sClassName;
-
- 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;
-
- };
-
-
- inline void DwFieldBody::SetOffset(int aOffset)
- {
- mLineOffset = aOffset;
- }
-
-
- inline void DwFieldBody::SetFolding(DwBool aTrueOrFalse)
- {
- mDoFolding = aTrueOrFalse;
- }
-
-
- inline DwBool DwFieldBody::IsFolding() const
- {
- return mDoFolding;
- }
-
- #endif
-