summaryrefslogtreecommitdiffstats
path: root/libkmime/kmime_headers.h
blob: 02d0ad6a1e69ba8b3f9d8790ac58b663a4a44c80 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
/*
    kmime_headers.h

    KMime, the KDE internet mail/usenet news message library.
    Copyright (c) 2001-2002 the KMime authors.
    See file AUTHORS for details

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2.0 as
    published by the Free Software Foundation.
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software Foundation,
    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, US
*/
#ifndef __KMIME_HEADERS_H__
#define __KMIME_HEADERS_H__

// Content:
//
// - header's base class defining the common interface
// - generic base classes for different types of fields
// - incompatible, GStructured-based field classes
// - compatible, GUnstructured-based field classes

#include "kmime_header_parsing.h"

#include <tqstring.h>
#include <tqstrlist.h>
#include <tqstringlist.h>
#include <tqregexp.h>
#include <tqdatetime.h>
#include <tqasciidict.h>
#include <tqmap.h>
#include <tqptrlist.h>

#include <time.h>

#include <kdemacros.h>

namespace KMime {

//forward declaration
class Content;

namespace Headers {


enum contentCategory    { CCsingle,
                          CCcontainer,
                          CCmixedPart,
                          CCalternativePart };

enum contentEncoding    { CE7Bit,
                          CE8Bit,
                          CEquPr,
                          CEbase64,
                          CEuuenc,
                          CEbinary };

enum contentDisposition { CDinline,
                          CDattachment,
                          CDparallel };

//often used charset
static const TQCString Latin1("ISO-8859-1");

#define mk_trivial_subclass_with_name( subclass, subclassName, baseclass ) \
class subclass : public Generics::baseclass { \
public: \
  subclass() : Generics::baseclass() {} \
  subclass( Content * p ) : Generics::baseclass( p ) {} \
  subclass( Content * p, const TQCString & s ) \
    : Generics::baseclass( p ) { from7BitString( s ); } \
  subclass( Content * p, const TQString & s, const TQCString & cs ) \
    : Generics::baseclass( p ) { fromUnicodeString( s, cs ); } \
  ~subclass() {} \
  \
  const char * type() const { return #subclassName; } \
}
 
#define mk_trivial_subclass( subclass, baseclass ) \
mk_trivial_subclass_with_name( subclass, subclass, baseclass )

#define mk_parsing_subclass_with_name( subclass, subclassName, baseclass ) \
class subclass : public Generics::baseclass { \
public: \
  subclass() : Generics::baseclass() {} \
  subclass( Content * p ) : Generics::baseclass( p ) {} \
  subclass( Content * p, const TQCString & s ) \
    : Generics::baseclass( p ) { from7BitString( s ); } \
  subclass( Content * p, const TQString & s, const TQCString & cs ) \
    : Generics::baseclass( p ) { fromUnicodeString( s, cs ); } \
  ~subclass() {} \
  \
  const char * type() const { return #subclassName; } \
protected: \
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false ); \
}

#define mk_parsing_subclass( subclass, baseclass ) \
mk_parsing_subclass_with_name( subclass, subclass, baseclass )

//
//
// HEADER'S BASE CLASS. DEFINES THE COMMON INTERFACE
//
//

/** Baseclass of all header-classes. It represents a
    header-field as described in RFC-822.  */
class KDE_EXPORT Base {

  public:
    typedef TQPtrList<Base> List;

    /** Create an empty header. */
    Base() : e_ncCS(0), p_arent(0) {}

    /** Create an empty header with a parent-content. */
    Base(KMime::Content *parent) : e_ncCS(0), p_arent(parent) {}

    /** Destructor */
    virtual ~Base()  {}

    /** Return the parent of this header. */
    KMime::Content* parent()  { return p_arent; }

    /** Set the parent for this header. */
    void setParent(KMime::Content *p)  { p_arent=p; }

    /** Parse the given string. Take care of RFC2047-encoded
	strings. A default charset is given. If the last parameter
	is true the default charset is used in any case */
    virtual void from7BitString(const TQCString&)  {}

    /** Return the encoded header. The parameter specifies
	whether the header-type should be included. */
    virtual TQCString as7BitString(bool=true)  { return TQCString(); }

    /** Return the charset that is used for RFC2047-encoding */
    TQCString rfc2047Charset();

    /** Set the charset for RFC2047-encoding */
    void setRFC2047Charset(const TQCString &cs);

    /** Return the default charset */
    TQCString defaultCS();

    /** Return if the default charset is mandatory */
    bool forceCS();

    /** Parse the given string and set the charset. */
    virtual void fromUnicodeString(const TQString&, const TQCString&)  {}

    /** Return the decoded content of the header without
       the header-type. */
    virtual TQString asUnicodeString()  { return TQString(); }

    /** Delete */
    virtual void clear()  {}

    /** Do we have data? */
    virtual bool isEmpty()  { return false; }

    /** Return the type of this header (e.g. "From") */
    virtual const char* type()  { return ""; }

    /** Check if this header is of type t. */
    bool is(const char* t)  { return (strcasecmp(t, type())==0); }

    /** Check if this header is a MIME header */
    bool isMimeHeader()  { return (strncasecmp(type(), "Content-", 8)==0); }

    /** Check if this header is a X-Header */
    bool isXHeader()  { return (strncmp(type(), "X-", 2)==0); }

  protected:
    TQCString typeIntro()  { return (TQCString(type())+": "); }

    const char *e_ncCS;
    Content *p_arent;

};


//
//
// GENERIC BASE CLASSES FOR DIFFERENT TYPES OF FIELDS
//
//

namespace Generics {

/** Abstract base class for unstructured header fields
    (e.g. "Subject", "Comment", "Content-description").
    
    Features: Decodes the header according to RFC2047, incl. RFC2231
    extensions to encoded-words.

    Subclasses need only re-implement @p const @p char* @p type().

    A macro to automate this is named
\code
    MK_TRIVIAL_GUnstructured_SUBCLASS(classname,headername);
\endcode

    The ContentDescription class then reads:
\code
    MK_TRIVIAL_GUnstructured_SUBCLASS(ContentDescription,Content-Description);
\endcode
*/

  // known issues:
  // - uses old decodeRFC2047String function, instead of our own...

class KDE_EXPORT GUnstructured : public Base {

public:
  GUnstructured() : Base()  {}
  GUnstructured( Content * p ) : Base( p ) {}
  GUnstructured( Content * p, const TQCString & s )
    : Base( p ) { from7BitString(s); }
  GUnstructured( Content * p, const TQString & s, const TQCString & cs )
    : Base( p )  { fromUnicodeString( s, cs ); }
  ~GUnstructured()  {}

  virtual void from7BitString( const TQCString& str );
  virtual TQCString as7BitString( bool withHeaderType=true );

  virtual void fromUnicodeString( const TQString & str,
				  const TQCString & suggestedCharset);
  virtual TQString asUnicodeString();

  virtual void clear()            { d_ecoded.truncate(0); }
  virtual bool isEmpty()          { return (d_ecoded.isEmpty()); }

private:
  TQString d_ecoded;
};

/** This is the base class for all structured header fields. It
    contains parsing methods for all basic token types found in
    rfc2822.

    @section Parsing

    At the basic level, there are tokens & tspecials (rfc2045),
    atoms & specials, quoted-strings, domain-literals (all rfc822) and
    encoded-words (rfc2047).

    As a special token, we have the comment. It is one of the basic
    tokens defined in rfc822, but it's parsing relies in part on the
    basic token parsers (e.g. comments may contain encoded-words).
    Also, most upper-level parsers (notably those for phrase and
    dot-atom) choose to ignore any comment when parsing.

    Then there are the real composite tokens, which are made up of one
    or more of the basic tokens (and semantically invisible comments):
    phrases (rfc822 with rfc2047) and dot-atoms (rfc2822).
    
    This finishes the list of supported token types. Subclasses will
    provide support for more higher-level tokens, where necessary,
    using these parsers.

    @short Base class for structured header fields.
    @author Marc Mutz <mutz@kde.org>
*/

class KDE_EXPORT GStructured : public Base {
public:
  GStructured() : Base()  {}
  GStructured( Content * p ) : Base( p ) {}
  GStructured( Content * p, const TQCString & s )
    : Base( p ) { from7BitString(s); }
  GStructured( Content * p, const TQString & s, const TQCString & cs )
    : Base( p )  { fromUnicodeString( s, cs ); }
  ~GStructured()  {}

  
protected:
#if 0
  // the assembly squad:

  bool writeAtom( char* & dcursor, const char * const dend, const TQString & input );
  bool writeAtom( char* & dcursor, const char * const dend,
		  const TQPair<const char*,int> & input );
  bool writeToken( char* & dcursor, const char * const dend, const TQString & input );
  bool writeToken( char* & dcursor, const char * const dend,
		   const TQPair<const char*int> & input );

  bool writeGenericQuotedString( char* & dcursor, const char * const dend,
				 const TQString & input, bool withCRLF=false );
  bool writeComment( char* & dcursor, const char * const dend,
		     const TQString & input, bool withCRLF=false );
  bool writePhrase( char* & dcursor, const char * const dend,
		    const TQString & input, bool withCRLF=false );
  bool writeDotAtom( char* & dcursor, const char * const dend,
		     const TQString & input, bool withCRLF=false );
#endif
};


class KDE_EXPORT GAddress : public GStructured {
public:
  GAddress() : GStructured()  {}
  GAddress( Content * p ) : GStructured( p ) {}
  GAddress( Content * p, const TQCString & s )
    : GStructured( p ) { from7BitString(s); }
  GAddress( Content * p, const TQString & s, const TQCString & cs )
    : GStructured( p )  { fromUnicodeString( s, cs ); }
  ~GAddress()  {}

protected:
};


/** Base class for headers that deal with (possibly multiple)
    addresses, but don't allow groups: */
class KDE_EXPORT MailboxList : public GAddress {
public:
  MailboxList() : GAddress()  {}
  MailboxList( Content * p ) : GAddress( p ) {}
  MailboxList( Content * p, const TQCString & s )
    : GAddress( p ) { from7BitString(s); }
  MailboxList( Content * p, const TQString & s, const TQCString & cs )
    : GAddress( p )  { fromUnicodeString( s, cs ); }
  ~MailboxList()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  /** The list of mailboxes */
  TQValueList<Types::Mailbox> mMailboxList;
};


/** Base class for headers that deal with exactly one mailbox
    (e.g. Sender) */
mk_parsing_subclass(SingleMailbox,MailboxList);

/** Base class for headers that deal with (possibly multiple)
    addresses, allowing groups. */
class KDE_EXPORT AddressList : public GAddress {
public:
  AddressList() : GAddress()  {}
  AddressList( Content * p ) : GAddress( p ) {}
  AddressList( Content * p, const TQCString & s )
    : GAddress( p ) { from7BitString(s); }
  AddressList( Content * p, const TQString & s, const TQCString & cs )
    : GAddress( p )  { fromUnicodeString( s, cs ); }
  ~AddressList()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  /** The list of addresses */
  TQValueList<Types::Address> mAddressList;
};

/** Base class for headers which deal with a list of msg-id's */
class KDE_EXPORT GIdent : public GAddress {
public:
  GIdent() : GAddress()  {}
  GIdent( Content * p ) : GAddress( p ) {}
  GIdent( Content * p, const TQCString & s )
    : GAddress( p ) { from7BitString(s); }
  GIdent( Content * p, const TQString & s, const TQCString & cs )
    : GAddress( p )  { fromUnicodeString( s, cs ); }
  ~GIdent()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  /** The list of msg-id's */
  TQValueList<Types::AddrSpec> mMsgIdList;
};

/** Base class for headers which deal with a list of msg-id's */
mk_parsing_subclass(GSingleIdent,GIdent);

/** Base class for headers which deal with a single atom. */
class KDE_EXPORT GToken : public GStructured {
public:
  GToken() : GStructured()  {}
  GToken( Content * p ) : GStructured( p ) {}
  GToken( Content * p, const TQCString & s )
    : GStructured( p ) { from7BitString(s); }
  GToken( Content * p, const TQString & s, const TQCString & cs )
    : GStructured( p )  { fromUnicodeString( s, cs ); }
  ~GToken()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  TQCString mToken;
};


class KDE_EXPORT GPhraseList : public GStructured {
public:
  GPhraseList() : GStructured()  {}
  GPhraseList( Content * p ) : GStructured( p ) {}
  GPhraseList( Content * p, const TQCString & s )
    : GStructured( p ) { from7BitString(s); }
  GPhraseList( Content * p, const TQString & s, const TQCString & cs )
    : GStructured( p )  { fromUnicodeString( s, cs ); }
  ~GPhraseList()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  TQStringList mPhraseList;
};

class KDE_EXPORT GDotAtom : public GStructured {
public:
  GDotAtom() : GStructured()  {}
  GDotAtom( Content * p ) : GStructured( p ) {}
  GDotAtom( Content * p, const TQCString & s )
    : GStructured( p ) { from7BitString(s); }
  GDotAtom( Content * p, const TQString & s, const TQCString & cs )
    : GStructured( p )  { fromUnicodeString( s, cs ); }
  ~GDotAtom()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  TQString mDotAtom;
};

class KDE_EXPORT GParametrized : public GStructured {
public:
  GParametrized() : GStructured()  {}
  GParametrized( Content * p ) : GStructured( p ) {}
  GParametrized( Content * p, const TQCString & s )
    : GStructured( p ) { from7BitString(s); }
  GParametrized( Content * p, const TQString & s, const TQCString & cs )
    : GStructured( p )  { fromUnicodeString( s, cs ); }
  ~GParametrized()  {}

protected:
  TQMap<TQString,TQString> mParameterHash;

private:
};

class KDE_EXPORT GContentType : public GParametrized {
public:
  GContentType() : GParametrized()  {}
  GContentType( Content * p ) : GParametrized( p ) {}
  GContentType( Content * p, const TQCString & s )
    : GParametrized( p ) { from7BitString(s); }
  GContentType( Content * p, const TQString & s, const TQCString & cs )
    : GParametrized( p )  { fromUnicodeString( s, cs ); }
  ~GContentType()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  TQCString mMimeType;
  TQCString mMimeSubType;
};


class KDE_EXPORT GCISTokenWithParameterList : public GParametrized {
public:
  GCISTokenWithParameterList() : GParametrized()  {}
  GCISTokenWithParameterList( Content * p ) : GParametrized( p ) {}
  GCISTokenWithParameterList( Content * p, const TQCString & s )
    : GParametrized( p ) { from7BitString(s); }
  GCISTokenWithParameterList( Content * p, const TQString & s, const TQCString & cs )
    : GParametrized( p )  { fromUnicodeString( s, cs ); }
  ~GCISTokenWithParameterList()  {}

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );

  TQCString mToken;
};


} // namespace Generics

//
//
// INCOMPATIBLE, GSTRUCTURED-BASED FIELDS:
//
//


/** Represents the Return-Path header field. */
class KDE_EXPORT ReturnPath : public Generics::GAddress {
public:
  ReturnPath() : Generics::GAddress()  {}
  ReturnPath( Content * p ) : Generics::GAddress( p ) {}
  ReturnPath( Content * p, const TQCString & s )
    : Generics::GAddress( p ) { from7BitString(s); }
  ReturnPath( Content * p, const TQString & s, const TQCString & cs )
    : Generics::GAddress( p )  { fromUnicodeString( s, cs ); }
  ~ReturnPath()  {}

  const char * type() const { return "Return-Path"; }

protected:
  bool parse( const char* & scursor, const char * const send, bool isCRLF=false );
};

#if defined(KMIME_NEW_STYLE_CLASSTREE)
// classes whose names collide with earlier ones:

// GAddress et al.:

// rfc(2)822 headers:
mk_trivial_subclass(From,MailboxList);
mk_trivial_subclass(Sender,SingleMailbox);
mk_trivial_subclass_with_name(ReplyTo,Reply-To,AddressList);
mk_trivial_subclass(Cc,AddressList);
mk_trivial_subclass(Bcc,AddressList);
// usefor headers:
mk_trivial_subclass_with_name(MailCopiesTo,Mail-Copies-To,AddressList);

// GToken:

mk_trivial_subclass_with_name(ContentTransferEncoding,
			      Content-Transfer-Encoding,GToken);

// GPhraseList:

mk_trivial_subclass(Keywords,GPhraseList);

// GDotAtom:

mk_trivial_subclass_with_name(MIMEVersion,MIME-Version,GDotAtom);

// GIdent:

mk_trivial_subclass_with_name(MessageID,Message-ID,GSingleIdent);
mk_trivial_subclass_with_name(ContentID,Content-ID,GSingleIdent);
mk_trivial_subclass(Supersedes,GSingleIdent);
mk_trivial_subclass_with_name(InReplyTo,In-Reply-To,GIdent);
mk_trivial_subclass(References,GIdent);

// GContentType:

mk_trivial_subclass_with_name(ContentType,ContentType,GContentType);

// GCISTokenWithParameterList:

mk_trivial_subclass_with_name(ContentDisposition,Content-Disposition,
			      GCISTokenWithParameterList);


#endif


//
//
// COMPATIBLE GUNSTRUCTURED-BASED FIELDS:
//
//


/** Represents an arbitrary header, that can contain
    any header-field.
    Adds a type over GUnstructured.
    @see GUnstructured
*/
class KDE_EXPORT Generic : public Generics::GUnstructured {

  public:
    Generic() : Generics::GUnstructured(), t_ype(0) {}
    Generic(const char *t)
      : Generics::GUnstructured(), t_ype(0) { setType(t); }
    Generic(const char *t, Content *p)
      : Generics::GUnstructured( p ), t_ype(0) { setType(t); }
    Generic(const char *t, Content *p, const TQCString &s)
      : Generics::GUnstructured( p, s ), t_ype(0) { setType(t); }
    Generic(const char *t, Content *p, const TQString &s, const TQCString &cs)
      : Generics::GUnstructured( p, s, cs ), t_ype(0) { setType(t); }
    ~Generic() { delete[] t_ype; }

    virtual void clear()            { delete[] t_ype; GUnstructured::clear(); }
    virtual bool isEmpty()          { return (t_ype==0 || GUnstructured::isEmpty()); }
    virtual const char* type()      { return t_ype; }
    void setType(const char *type);

  protected:
    char *t_ype;

};


/** Represents a "Subject" header */
class KDE_EXPORT Subject : public Generics::GUnstructured {

  public:
    Subject() : Generics::GUnstructured()  {}
    Subject( Content * p ) : Generics::GUnstructured( p )  {}
    Subject( Content * p, const TQCString & s )
      : Generics::GUnstructured( p, s ) {}
    Subject( Content * p, const TQString & s, const TQCString & cs )
      : Generics::GUnstructured( p, s, cs ) {}
    ~Subject()  {}

    virtual const char* type() { return "Subject"; }

    bool isReply() {
      return ( asUnicodeString().find( TQString("Re:"), 0, false ) == 0 );
    }
};

/** Represents a "Organization" header */
class KDE_EXPORT Organization : public Generics::GUnstructured {

  public:
    Organization() : Generics::GUnstructured() {}
    Organization( Content * p ) : Generics::GUnstructured( p ) {}
    Organization( Content * p, const TQCString & s )
      : Generics::GUnstructured( p, s ) {};
    Organization( Content * p, const TQString & s, const TQCString & cs)
      : Generics::GUnstructured( p, s, cs ) {}
    ~Organization()  {}

    virtual const char* type()      { return "Organization"; }

};

//
//
// NOT YET CONVERTED STUFF BELOW:
//
//



/** Represents a "Control" header */
class KDE_EXPORT Control : public Base {

  public:
    Control() : Base()  {}
    Control(Content *p) : Base(p)  {}
    Control(Content *p, const TQCString &s) : Base(p) { from7BitString(s); }
    Control(Content *p, const TQString &s) : Base(p)  { fromUnicodeString(s, Latin1); }
    ~Control()  {}

    virtual void from7BitString(const TQCString &s);
    virtual TQCString as7BitString(bool incType=true);
    virtual void fromUnicodeString(const TQString &s, const TQCString&);
    virtual TQString asUnicodeString();
    virtual void clear()            { c_trlMsg.truncate(0); }
    virtual bool isEmpty()          { return (c_trlMsg.isEmpty()); }
    virtual const char* type()      { return "Control"; }

    bool isCancel()                 { return (c_trlMsg.find("cancel", 0, false)!=-1); }

  protected:
    TQCString c_trlMsg;

};

/** Represents a "Date" header */
class KDE_EXPORT Date : public Base {

  public:
    Date() : Base(), t_ime(0)  {}
    Date(Content *p) : Base(p), t_ime(0)  {}
    Date(Content *p, time_t t) : Base(p), t_ime(t)  {}
    Date(Content *p, const TQCString &s) : Base(p)  { from7BitString(s); }
    Date(Content *p, const TQString &s) : Base(p)  { fromUnicodeString(s, Latin1); }
    ~Date()  {}

    virtual void from7BitString(const TQCString &s);
    virtual TQCString as7BitString(bool incType=true);
    virtual void fromUnicodeString(const TQString &s, const TQCString&);
    virtual TQString asUnicodeString();
    virtual void clear()            { t_ime=0; }
    virtual bool isEmpty()          { return (t_ime==0); }
    virtual const char* type()      { return "Date"; }

    time_t unixTime()               { return t_ime; }
    void setUnixTime(time_t t)      { t_ime=t; }
    void setUnixTime()              { t_ime=time(0); }
    TQDateTime qdt();
    int ageInDays();
    
  protected:
    time_t t_ime;

};


/** Represents a "Newsgroups" header */
class KDE_EXPORT Newsgroups : public Base {

  public:
    Newsgroups() : Base()  {}
    Newsgroups(Content *p) : Base(p)  {}
    Newsgroups(Content *p, const TQCString &s) : Base(p)  { from7BitString(s); }
    Newsgroups(Content *p, const TQString &s) : Base(p)  { fromUnicodeString(s, Latin1); }
    ~Newsgroups()  {}

    virtual void from7BitString(const TQCString &s);
    virtual TQCString as7BitString(bool incType=true);
    virtual void fromUnicodeString(const TQString &s, const TQCString&);
    virtual TQString asUnicodeString();
    virtual void clear()            { g_roups.resize(0); }
    virtual bool isEmpty()          { return g_roups.isEmpty(); }
    virtual const char* type()      { return "Newsgroups"; }

    TQCString firstGroup();
    bool isCrossposted()            { return ( g_roups.find(',')>-1 ); }
    TQStringList getGroups();

  protected:
    TQCString g_roups;

};


/** Represents a "Followup-To" header */
class KDE_EXPORT FollowUpTo : public Newsgroups {

  public:
    FollowUpTo() : Newsgroups()  {}
    FollowUpTo(Content *p) : Newsgroups(p)  {}
    FollowUpTo(Content *p, const TQCString &s) : Newsgroups(p,s)  {}
    FollowUpTo(Content *p, const TQString &s) : Newsgroups(p,s)  {}
    ~FollowUpTo()  {}

    virtual const char* type()        { return "Followup-To"; }

};


/** Represents a "Lines" header */
class KDE_EXPORT Lines : public Base {

  public:
    Lines() : Base(),l_ines(-1)  {}
    Lines(Content *p) : Base(p),l_ines(-1)  {}
    Lines(Content *p, unsigned int i) : Base(p),l_ines(i)  {}
    Lines(Content *p, const TQCString &s) : Base(p)  { from7BitString(s); }
    Lines(Content *p, const TQString &s) : Base(p)  { fromUnicodeString(s, Latin1); }
    ~Lines()                 {}

    virtual void from7BitString(const TQCString &s);
    virtual TQCString as7BitString(bool incType=true);
    virtual void fromUnicodeString(const TQString &s, const TQCString&);
    virtual TQString asUnicodeString();
    virtual void clear()            { l_ines=-1; }
    virtual bool isEmpty()          { return (l_ines==-1); }
    virtual const char* type()      { return "Lines"; }

    int numberOfLines()             { return l_ines; }
    void setNumberOfLines(int i)    { l_ines=i; }

  protected:
    int l_ines;

};



/** Represents a "User-Agent" header */
class KDE_EXPORT UserAgent : public Base {

  public:
    UserAgent() : Base()  {}
    UserAgent(Content *p) : Base(p)  {}
    UserAgent(Content *p, const TQCString &s) : Base(p)  { from7BitString(s); }
    UserAgent(Content *p, const TQString &s) : Base(p)  { fromUnicodeString(s, Latin1); }
    ~UserAgent()  {}

    virtual void from7BitString(const TQCString &s);
    virtual TQCString as7BitString(bool incType=true);
    virtual void fromUnicodeString(const TQString &s, const TQCString&);
    virtual TQString asUnicodeString();
    virtual void clear()            { u_agent.resize(0); }
    virtual bool isEmpty()          { return (u_agent.isEmpty()); }
    virtual const char* type()      { return "User-Agent"; }

  protected:
    TQCString u_agent;

};


#if !defined(KMIME_NEW_STYLE_CLASSTREE)
#include "kmime_headers_obs.h"
#endif
}  //namespace Headers

#if 0
typedef Headers::Base* (*headerCreator)(void);

/** This is a factory for KMime::Headers. You can create new header
    objects by type with @ref create and @ref upgrade an existing
    @ref Headers::Generic to a specialized header object.

    If you are a header class author, you can register your class
    (let's call it Foo) so:
    <pre>
    
    </pre>    

    @short Factory for KMime::Headers
    @author Marc Mutz <mutz@kde.org>
    @see KMime::Headers::Base KMime::Headers::Generic
*/

class HeaderFactory : public TQAsciiDict<headerCreator>
{
private:
  HeaderFactory();
  ~HeaderFactory() {}
  static TQAsciiDict

public:
  /** Create a new header object of type @p aType, or a fitting
      generic substitute, if available and known
  */
  static Headers::Base* create( const char* aType )
  {
    if (!s_elf)
      s_elf = new HeaderFactory;
    headerCreator * hc = (*s_elf)[aType];
    if ( !hc )
      return 0;
    else
      return (*hc)();
  }

  /** This is a wrapper around the above function, provided for
      convenience. It differs from the above only in what arguments it
      takes.
  */
  static Headers::Base* create( const TQCString& aType )
  {
    return create( aType.data() );
  }

  /** Consume @p aType and build a header object that corresponds to
      the type that @p aType->type() returns.
      @param  aType    generic header to upgrade. This will be deleted
                       if necessary, so don't use references to it after
                       calling this function.
      @return A corresponding header object (if available), or a generic
      object for this kind of header (if known), or @p aType (else).
      @see Headers::Generic create
  */
  static Headers::Base* upgrade( Headers::Generic* aType ) { (void)aType; return new Headers::Base; }

};

#endif

}  //namespace KMime


#endif // __KMIME_HEADERS_H__