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- //=============================================================================
- // File: text.h
- // Contents: Declarations for DwText
- // 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_TEXT_H
- #define DW_TEXT_H
-
- #ifndef DW_CONFIG_H
- #include <mimelib/config.h>
- #endif
-
- #ifndef DW_STRING_H
- #include <mimelib/string.h>
- #endif
-
- #ifndef DW_FIELDBDY_H
- #include <mimelib/fieldbdy.h>
- #endif
-
- //=============================================================================
- //+ Name DwText -- Class representing text in a RFC-822 header field-body
- //+ Description
- //. {\tt DwText} represents an unstructured field body in a header field.
- //. It roughly corresponds to the {\it text} element of the BNF grammar
- //. defined in RFC-822.
- //=============================================================================
- // Last modified 1997-07-30
- //+ Noentry ~DwText sClassName _PrintDebugInfo
-
-
- class DW_EXPORT DwText : public DwFieldBody {
-
- public:
-
- DwText();
- DwText(const DwText& aText);
- DwText(const DwString& aStr, DwMessageComponent* aParent=0);
- //. The first constructor is the default constructor, which sets the
- //. {\tt DwText} object's string representation to the empty string
- //. and sets its parent to NULL.
- //.
- //. The second constructor is the copy constructor, which copies the
- //. string representation from {\tt aText}.
- //. The parent of the new {\tt DwText} object is set to NULL.
- //.
- //. The third constructor copies {\tt aStr} to the {\tt DwText}
- //. 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 NULL, {\tt aParent} should point to an object of a class
- //. derived from {\tt DwField}.
-
- virtual ~DwText();
-
- const DwText& operator = (const DwText& aText);
- //. This is the assignment operator.
-
- virtual void Parse();
- //. This virtual member function is inherited from
- //. {\tt DwMessageComponent}, where it is declared a pure virtual
- //. function. For a {\tt DwText} object, this member function does
- //. nothing, since {\tt DwText} represents an unstructured field body
- //. (like the Subject header field) that does not have a broken-down
- //. form.
- //.
- //. Note, however, that this function should still be called consistently,
- //. since a subclass of {\tt DwText} may implement a parse method.
- //.
- //. This function clears the is-modified flag.
-
- virtual void Assemble();
- //. This virtual member function is inherited from
- //. {\tt DwMessageComponent}, where it is declared a pure virtual
- //. function. For a {\tt DwText} object, this member function does
- //. nothing, since {\tt DwText} represents an unstructured field body
- //. (like the Subject header field) that does not have a broken-down
- //. form.
- //.
- //. Note, however, that this function should still be called consistently,
- //. since a subclass of {\tt DwText} may implement an assemble method.
- //.
- //. This function clears the is-modified flag.
-
- virtual DwMessageComponent* Clone() const;
- //. This virtual function, inherited from {\tt DwMessageComponent},
- //. creates a new {\tt DwText} on the free store that has the same
- //. value as this {\tt DwText} object. The basic idea is that of
- //. a ``virtual copy constructor.''
-
- static DwText* NewText(const DwString& aStr, DwMessageComponent* aParent);
- //. Creates a new {\tt DwText} object on the free store.
- //. If the static data member {\tt sNewText} is NULL,
- //. this member function will create a new {\tt DwText}
- //. and return it. Otherwise, {\tt NewText()} will call
- //. the user-supplied function pointed to by {\tt sNewText},
- //. which is assumed to return an object from a class derived from
- //. {\tt DwText}, and return that object.
-
- //+ Var sNewText
- static DwText* (*sNewText)(const DwString&, DwMessageComponent*);
- //. If {\tt sNewText} is not NULL, it is assumed to point to a
- //. user-supplied function that returns an object from a class derived from
- //. {\tt DwText}.
-
- 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;
-
- };
-
- #endif
-