camel/camel-folder-thread.c



7ea24b0cb1

91cc026904
7ea24b0cb1
91cc026904
7ea24b0cb1
4ca07463a0


7ea24b0cb1
4ca07463a0


7ea24b0cb1
4ca07463a0


7ea24b0cb1


fe962a2055
7ea24b0cb1
fe962a2055

7ea24b0cb1


7ea24b0cb1
fe962a2055
7ea24b0cb1


bef39dc4e0
7ea24b0cb1


cb66ad3fe4


7ea24b0cb1


cb66ad3fe4
7ea24b0cb1


1fbfdbd43e
7ea24b0cb1


1fbfdbd43e
7ea24b0cb1


fcab7b5779
7ea24b0cb1


1fbfdbd43e
7ea24b0cb1


d5f7add041


7ea24b0cb1


7ea24b0cb1


7ea24b0cb1

6de256c2a2

7ea24b0cb1


d3027e6fa9
7ea24b0cb1


d3027e6fa9
cb66ad3fe4
7ea24b0cb1


2711a779ae
7ea24b0cb1


9945af011e


7ea24b0cb1


fcab7b5779
01a5bc2c2c
0175b0b3ea
fcab7b5779


01a5bc2c2c
fcab7b5779


f1f97ce865
fcab7b5779


f1f97ce865


fcab7b5779
7ea24b0cb1


d5f7add041
7ea24b0cb1
7ea24b0cb1


d5f7add041


9945af011e
a570bb037f
d5f7add041

9945af011e


a570bb037f
d5f7add041

a570bb037f


9945af011e
a570bb037f
a570bb037f
d5f7add041


a570bb037f

d5f7add041
9945af011e
a570bb037f

d5f7add041

a570bb037f
9945af011e
d5f7add041


a570bb037f
d5f7add041

a570bb037f
d5f7add041

a570bb037f
d5f7add041


a570bb037f


d5f7add041
a570bb037f
d5f7add041
a570bb037f
d5f7add041
a570bb037f
d5f7add041

a570bb037f
d5f7add041


a570bb037f
d5f7add041

9945af011e
a570bb037f
d5f7add041
a570bb037f
a570bb037f
d5f7add041


a570bb037f
d5f7add041
a570bb037f
d5f7add041


a570bb037f
d5f7add041


a570bb037f
d5f7add041


b48b984e10


d5f7add041


a570bb037f


d5f7add041
7ea24b0cb1


d5f7add041
7ea24b0cb1
d5f7add041


a570bb037f
d5f7add041


a570bb037f

7ea24b0cb1


d5f7add041


7ea24b0cb1
7ea24b0cb1
d5f7add041
7ea24b0cb1
d5f7add041


b48b984e10
d5f7add041


7ea24b0cb1


d5f7add041
7ea24b0cb1
d5f7add041


7ea24b0cb1
d5f7add041
7ea24b0cb1

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


/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright (C) 2000 Ximian Inc.
 *
 *  Authors: Michael Zucchi <notzed@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* TODO: This could probably be made a camel object, but it isn't really required */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <glib.h>

#include "camel-folder-thread.h"
#include "e-util/e-memory.h"

#define d(x)

/*#define TIMEIT*/

#ifdef TIMEIT
#include <sys/time.h>
#include <unistd.h>
#endif

static void
container_add_child(CamelFolderThreadNode *node, CamelFolderThreadNode *child)
{
    d(printf("\nAdding child %p to parent %p \n", child, node));
    child->next = node->child;
    node->child = child;
    child->parent = node;
}

static void
container_parent_child(CamelFolderThreadNode *parent, CamelFolderThreadNode *child)
{
    CamelFolderThreadNode *c, *node;

    /* are we already the right parent? */
    if (child->parent == parent)
        return;

    /* would this create a loop? */
    node = parent->parent;
    while (node) {
        if (node == child)
            return;
        node = node->parent;
    }

    /* are we unparented? */
    if (child->parent == NULL) {
        container_add_child(parent, child);
        return;
    }

    /* else remove child from its existing parent, and reparent */
    node = child->parent;
    c = (CamelFolderThreadNode *)&node->child;
    d(printf("scanning children:\n"));
    while (c->next) {
        d(printf(" %p\n", c));
            if (c->next==child) {
            d(printf("found node %p\n", child));
            c->next = c->next->next;
            child->parent = NULL;
            container_add_child(parent, child);
            return;
        }
        c = c->next;
    }

    printf("DAMN, we shouldn't  be here!\n");
}

static void
prune_empty(CamelFolderThread *thread, CamelFolderThreadNode **cp)
{
    CamelFolderThreadNode *child, *next, *c, *lastc;

    /* yes, this is intentional */
    lastc = (CamelFolderThreadNode *)cp;
    while (lastc->next) {
        c = lastc->next;

        d(printf("checking message %p %p (%08x%08x)\n", c,
             c->message, c->message?c->message->message_id.id.part.hi:0,
             c->message?c->message->message_id.id.part.lo:0));
        if (c->message == NULL) {
            if (c->child == NULL) {
                d(printf("removing empty node\n"));
                lastc->next = c->next;
                e_memchunk_free(thread->node_chunks, c);
                continue;
            }
            if (c->parent || c->child->next==0) {
                d(printf("promoting child\n"));
                lastc->next = c->next; /* remove us */
                child = c->child;
                while (child) {
                    next = child->next;

                    child->parent = c->parent;
                    child->next = lastc->next;
                    lastc->next = child;

                    child = next;
                }
                continue;
            }
        }
        prune_empty(thread, &c->child);
        lastc = c;
    }
}

static void
hashloop(void *key, void *value, void *data)
{
    CamelFolderThreadNode *c = value;
    CamelFolderThreadNode *tail = data;

    if (c->parent == NULL) {
        c->next = tail->next;
        tail->next = c;
    }
}

static char *
get_root_subject(CamelFolderThreadNode *c, int *re)
{
    char *s, *p;
    CamelFolderThreadNode *scan;
    
    s = NULL;
    *re = FALSE;
    if (c->message)
        s = (char *)camel_message_info_subject(c->message);
    else {
        /* one of the children will always have a message */
        scan = c->child;
        while (scan) {
            if (scan->message) {
                s = (char *)camel_message_info_subject(scan->message);
                break;
            }
            scan = scan->next;
        }
    }
    if (s != NULL) {
        while (*s) {
            while (isspace(*s))
                s++;
            if (s[0] == 0)
                break;
            if ((s[0] == 'r' || s[0]=='R')
                && (s[1] == 'e' || s[1]=='E')) {
                p = s+2;
                while (isdigit(*p) || (ispunct(*p) && (*p != ':')))
                    p++;
                if (*p==':') {
                    *re = TRUE;
                    s = p+1;
                } else
                    break;
            } else
                break;
        }
        if (*s)
            return s;
    }
    return NULL;
}

/* this can be pretty slow, but not used often */
/* clast cannot be null */
static void
remove_node(CamelFolderThreadNode **list, CamelFolderThreadNode *node, CamelFolderThreadNode **clast)
{
    CamelFolderThreadNode *c;

    /* this is intentional, even if it looks funny */
    /* if we have a parent, then we should remove it from the parent list,
       otherwise we remove it from the root list */
    if (node->parent) {
        c = (CamelFolderThreadNode *)&node->parent->child;
    } else {
        c = (CamelFolderThreadNode *)list;
    }
    while (c->next) {
        if (c->next == node) {
            if (*clast == c->next)
                *clast = c;
            c->next = c->next->next;
            return;
        }
        c = c->next;
    }

    printf("ERROR: removing node %p failed\n", node);
}

static void
group_root_set(CamelFolderThread *thread, CamelFolderThreadNode **cp)
{
    GHashTable *subject_table = g_hash_table_new(g_str_hash, g_str_equal);
    CamelFolderThreadNode *c, *clast, *scan, *container;

    /* gather subject lines */ 
    d(printf("gathering subject lines\n"));
    clast = (CamelFolderThreadNode *)cp;
    c = clast->next;
    while (c) {
        c->root_subject = get_root_subject(c, &c->re);
        if (c->root_subject) {
            container = g_hash_table_lookup(subject_table, c->root_subject);
            if (container == NULL
                || (container->message == NULL && c->message)
                || (container->re == TRUE && !c->re)) {
                g_hash_table_insert(subject_table, c->root_subject, c);
            }
        }
        c = c->next;
    }

    /* merge common subjects? */
    clast = (CamelFolderThreadNode *)cp;
    while (clast->next) {
        c = clast->next;
        d(printf("checking %p %s\n", c, c->root_subject));
        if (c->root_subject
            && (container = g_hash_table_lookup(subject_table, c->root_subject))
            && (container != c)) {
            d(printf(" matching %p %s\n", container, container->root_subject));
            if (c->message == NULL && container->message == NULL) {
                d(printf("merge containers children\n"));
                /* steal the children from c onto container, and unlink c */
                scan = (CamelFolderThreadNode *)&container->child;
                while (scan->next)
                    scan = scan->next;
                scan->next = c->child;
                clast->next = c->next;
                e_memchunk_free(thread->node_chunks, c);
                continue;
            } if (c->message == NULL && container->message != NULL) {
                d(printf("container is non-empty parent\n"));
                remove_node(cp, container, &clast);
                container_add_child(c, container);
            } else if (c->message != NULL && container->message == NULL) {
                d(printf("container is empty child\n"));
                clast->next = c->next;
                container_add_child(container, c);
                continue;
            } else if (c->re && !container->re) {
                d(printf("container is re\n"));
                clast->next = c->next;
                container_add_child(container, c);
                continue;
            } else if (!c->re && container->re) {
                d(printf("container is not re\n"));
                remove_node(cp, container, &clast);
                container_add_child(c, container);
            } else if (c->re && container->re) {
                d(printf("subjects are common %p and %p\n", c, container));

                /* build a phantom node */
                remove_node(cp, container, &clast);
                remove_node(cp, c, &clast);

                scan = e_memchunk_alloc0(thread->node_chunks);

                scan->root_subject = c->root_subject;
                scan->re = c->re && container->re;
                scan->next = c->next;
                clast->next = scan;
                container_add_child(scan, c);
                container_add_child(scan, container);
                clast = scan;
                g_hash_table_insert(subject_table, scan->root_subject, scan);
                continue;
            }
        }
        clast = c;
    }
    g_hash_table_destroy(subject_table);
}

struct _tree_info {
    GHashTable *visited;
};

static int
dump_tree_rec(struct _tree_info *info, CamelFolderThreadNode *c, int depth)
{
    char *p;
    int count=0;

    p = alloca(depth*2+1);
    memset(p, ' ', depth*2);
    p[depth*2] = 0;

    while (c) {
        if (g_hash_table_lookup(info->visited, c)) {
            printf("WARNING: NODE REVISITED: %p\n", c);
        } else {
            g_hash_table_insert(info->visited, c, c);
        }
        if (c->message) {
            printf("%s %p Subject: %s <%.8s>\n", p, c, camel_message_info_subject(c->message), c->message->message_id.id.hash);
            count += 1;
        } else {
            printf("%s %p <empty>\n", p, c);
        }
        if (c->child)
            count += dump_tree_rec(info, c->child, depth+1);
        c = c->next;
    }
    return count;
}

int
camel_folder_threaded_messages_dump(CamelFolderThreadNode *c)
{
    int count;
    struct _tree_info info;

    info.visited = g_hash_table_new(g_direct_hash, g_direct_equal);
    count = dump_tree_rec(&info, c, 0);
    g_hash_table_destroy(info.visited);
    return count;
}

static int
sort_node(const void *a, const void *b)
{
    const CamelFolderThreadNode *a1 = ((CamelFolderThreadNode **)a)[0];
    const CamelFolderThreadNode *b1 = ((CamelFolderThreadNode **)b)[0];

    /* if we have no message, it must be a dummy node, which 
       also means it must have a child, just use that as the
       sort data (close enough?) */
    if (a1->message == NULL)
        a1 = a1->child;
    if (b1->message == NULL)
        b1 = b1->child;
    if (a1->order == b1->order)
        return 0;
    if (a1->order < b1->order)
        return -1;
    else
        return 1;
}

static void
sort_thread(CamelFolderThreadNode **cp)
{
    CamelFolderThreadNode *c, *head, **carray;
    int size=0;

    c = *cp;
    while (c) {
        /* sort the children while we're at it */
        if (c->child)
            sort_thread(&c->child);
        size++;
        c = c->next;
    }
    if (size<2)
        return;
    carray = alloca(size*sizeof(CamelFolderThreadNode *));
    c = *cp;
    size=0;
    while (c) {
        carray[size] = c;
        c = c->next;
        size++;
    }
    qsort(carray, size, sizeof(CamelFolderThreadNode *), sort_node);
    size--;
    head = carray[size];
    head->next = NULL;
    size--;
    do {
        c = carray[size];
        c->next = head;
        head = c;
        size--;
    } while (size>=0);
    *cp = head;
}

static guint id_hash(void *key)
{
    CamelSummaryMessageID *id = (CamelSummaryMessageID *)key;

    return id->id.part.lo;
}

static gint id_equal(void *a, void *b)
{
    return ((CamelSummaryMessageID *)a)->id.id == ((CamelSummaryMessageID *)b)->id.id;
}

/* perform actual threading */
static void
thread_summary(CamelFolderThread *thread, GPtrArray *summary)
{
    GHashTable *id_table, *no_id_table;
    int i;
    CamelFolderThreadNode *c, *child, *head;
#ifdef TIMEIT
    struct timeval start, end;
    unsigned long diff;

    gettimeofday(&start, NULL);
#endif

    id_table = g_hash_table_new((GHashFunc)id_hash, (GCompareFunc)id_equal);
    no_id_table = g_hash_table_new(NULL, NULL);
    for (i=0;i<summary->len;i++) {
        CamelMessageInfo *mi = summary->pdata[i];

        if (mi->message_id.id.id) {
            c = g_hash_table_lookup(id_table, &mi->message_id);
            /* check for duplicate messages */
            if (c && c->order) {
                /* if duplicate, just make out it is a no-id message,  but try and insert it
                   into the right spot in the tree */
                d(printf("doing: (duplicate message id)\n"));
                c = e_memchunk_alloc0(thread->node_chunks);
                g_hash_table_insert(no_id_table, (void *)mi, c);
            } else if (!c) {
                d(printf("doing : %08x%08x (%s)\n", mi->message_id.id.part.hi, mi->message_id.id.part.lo, camel_message_info_subject(mi)));
                c = e_memchunk_alloc0(thread->node_chunks);
                g_hash_table_insert(id_table, (void *)&mi->message_id, c);
            }
        } else {
            d(printf("doing : (no message id)\n"));
            c = e_memchunk_alloc0(thread->node_chunks);
            g_hash_table_insert(no_id_table, (void *)mi, c);
        }

        c->message = mi;
        c->order = i+1;
        child = c;
        if (mi->references) {
            int j;

            d(printf("references:\n"));
            for (j=0;j<mi->references->size;j++) {
                /* should never be empty, but just incase */
                if (mi->references->references[j].id.id == 0)
                    continue;

                c = g_hash_table_lookup(id_table, &mi->references->references[j]);
                if (c == NULL) {
                    d(printf("not found\n"));
                    c = e_memchunk_alloc0(thread->node_chunks);
                    g_hash_table_insert(id_table, &mi->references->references[j], c);
                }
                if (c!=child)
                    container_parent_child(c, child);
                child = c;
            }
        }
    }

    d(printf("\n\n"));
    /* build a list of root messages (no parent) */
    head = NULL;
    g_hash_table_foreach(id_table, hashloop, &head);
    g_hash_table_foreach(no_id_table, hashloop, &head);

    g_hash_table_destroy(id_table);
    g_hash_table_destroy(no_id_table);

    /* remove empty parent nodes */
    prune_empty(thread, &head);
    
    /* find any siblings which missed out - but only if we are allowing threading by subject */
    if (thread->subject)
        group_root_set (thread, &head);

#if 0
    printf("finished\n");
    i = camel_folder_thread_messages_dump(head);
    printf("%d count, %d items in tree\n", uids->len, i);
#endif

    sort_thread(&head);

    /* remove any phantom nodes, this could possibly be put in group_root_set()? */
    c = (CamelFolderThreadNode *)&head;
    while (c && c->next) {
        CamelFolderThreadNode *scan, *newtop;

        child = c->next;
        if (child->message == NULL) {
            newtop = child->child;
            /* unlink pseudo node */
            c->next = newtop;

            /* link its siblings onto the end of its children */
            scan = (CamelFolderThreadNode *)&newtop->child;
            while (scan->next)
                scan = scan->next;
            scan->next = newtop->next;
            /* and link the now 'real' node into the list */
            newtop->next = child->next;
            c = newtop;
            e_memchunk_free(thread->node_chunks, child);
        } else {
            c = child;
        }
    }

    /* this is only debug assertion stuff */
    c = (CamelFolderThreadNode *)&head;
    while (c->next) {
        c = c->next;
        if (c->message == NULL)
            g_warning("threading missed removing a pseudo node: %s\n", c->root_subject);
    }

    thread->tree = head;

#ifdef TIMEIT
    gettimeofday(&end, NULL);
    diff = end.tv_sec * 1000 + end.tv_usec/1000;
    diff -= start.tv_sec * 1000 + start.tv_usec/1000;
    printf("Message threading %d messages took %ld.%03ld seconds\n",
           summary->len, diff / 1000, diff % 1000);
#endif
}

/**
 * camel_folder_thread_messages_new:
 * @folder: 
 * @uids: The subset of uid's to thread.  If NULL. then thread all
 * uid's in @folder.
 * @thread_subject: thread based on subject also
 * 
 * Thread a (subset) of the messages in a folder.  And sort the result
 * in summary order.
 *
 * If @thread_subject is %TRUE, messages with
 * related subjects will also be threaded. The default behaviour is to
 * only thread based on message-id.
 * 
 * This function is probably to be removed soon.
 *
 * Return value: A CamelFolderThread contianing a tree of CamelFolderThreadNode's
 * which represent the threaded structure of the messages.
 **/
CamelFolderThread *
camel_folder_thread_messages_new (CamelFolder *folder, GPtrArray *uids, gboolean thread_subject)
{
    CamelFolderThread *thread;
    GHashTable *wanted = NULL;
    GPtrArray *summary;
    GPtrArray *fsummary;
    int i;

    thread = g_malloc(sizeof(*thread));
    thread->refcount = 1;
    thread->subject = thread_subject;
    thread->tree = NULL;
    thread->node_chunks = e_memchunk_new(32, sizeof(CamelFolderThreadNode));
    thread->folder = folder;
    camel_object_ref((CamelObject *)folder);

    /* get all of the summary items of interest in summary order */
    if (uids) {
        wanted = g_hash_table_new(g_str_hash, g_str_equal);
        for (i=0;i<uids->len;i++)
            g_hash_table_insert(wanted, uids->pdata[i], uids->pdata[i]);
    }

    fsummary = camel_folder_get_summary(folder);
    thread->summary = summary = g_ptr_array_new();

    for (i=0;i<fsummary->len;i++) {
        CamelMessageInfo *info = fsummary->pdata[i];

        if (wanted == NULL || g_hash_table_lookup(wanted, camel_message_info_uid(info)) != NULL) {
            camel_folder_ref_message_info(folder, info);
            g_ptr_array_add(summary, info);
        }
    }

    camel_folder_free_summary(folder, fsummary);

    thread_summary(thread, summary);

    g_hash_table_destroy(wanted);

    return thread;
}

/* add any still there, in the existing order */
static void
add_present_rec(CamelFolderThread *thread, GHashTable *have, GPtrArray *summary, CamelFolderThreadNode *node)
{
    while (node) {
        const char *uid = camel_message_info_uid(node->message);

        if (g_hash_table_lookup(have, (char *)uid)) {
            g_hash_table_remove(have, (char *)camel_message_info_uid(node->message));
            g_ptr_array_add(summary, (void *) node->message);
        } else {
            camel_folder_free_message_info(thread->folder, (CamelMessageInfo *)node->message);
        }

        if (node->child)
            add_present_rec(thread, have, summary, node->child);
        node = node->next;
    }
}

void
camel_folder_thread_messages_apply(CamelFolderThread *thread, GPtrArray *uids)
{
    int i;
    GPtrArray *all;
    GHashTable *table;
    CamelMessageInfo *info;

    all = g_ptr_array_new();
    table = g_hash_table_new(g_str_hash, g_str_equal);
    for (i=0;i<uids->len;i++)
        g_hash_table_insert(table, uids->pdata[i], uids->pdata[i]);

    add_present_rec(thread, table, all, thread->tree);

    /* add any new ones, in supplied order */
    for (i=0;i<uids->len;i++)
        if (g_hash_table_lookup(table, uids->pdata[i]) && (info = camel_folder_get_message_info(thread->folder, uids->pdata[i])))
            g_ptr_array_add(all, info);

    g_hash_table_destroy(table);

    thread->tree = NULL;
    e_memchunk_destroy(thread->node_chunks);
    thread->node_chunks = e_memchunk_new(32, sizeof(CamelFolderThreadNode));
    thread_summary(thread, all);

    g_ptr_array_free(thread->summary, TRUE);
    thread->summary = all;
}

void
camel_folder_thread_messages_ref(CamelFolderThread *thread)
{
    thread->refcount++;
}

/**
 * camel_folder_thread_messages_unref:
 * @thread: 
 * 
 * Free all memory associated with the thread descriptor @thread.
 **/
void
camel_folder_thread_messages_unref(CamelFolderThread *thread)
{
    if (thread->refcount > 1) {
        thread->refcount--;
        return;
    }

    if (thread->folder) {
        int i;

        for (i=0;i<thread->summary->len;i++)
            camel_folder_free_message_info(thread->folder, thread->summary->pdata[i]);
        g_ptr_array_free(thread->summary, TRUE);
        camel_object_unref((CamelObject *)thread->folder);
    }
    e_memchunk_destroy(thread->node_chunks);
    g_free(thread);
}

#if 0
/**
 * camel_folder_thread_messages_new_summary:
 * @summary: Array of CamelMessageInfo's to thread.
 * 
 * Thread a list of MessageInfo's.  The summary must remain valid for the
 * life of the CamelFolderThread created by this function, and it is upto the
 * caller to ensure this.
 * 
 * Return value: A CamelFolderThread contianing a tree of CamelFolderThreadNode's
 * which represent the threaded structure of the messages.
 **/
CamelFolderThread *
camel_folder_thread_messages_new_summary(GPtrArray *summary)
{
    CamelFolderThread *thread;

#ifdef TIMEIT
    struct timeval start, end;
    unsigned long diff;

    gettimeofday(&start, NULL);
#endif

    thread = g_malloc(sizeof(*thread));
    thread->refcount = 1;
    thread->tree = NULL;
    thread->node_chunks = e_memchunk_new(32, sizeof(CamelFolderThreadNode));
    thread->folder = NULL;
    thread->summary = NULL;

    thread_summary(thread, summary);

    return thread;
}

/* scan the list in depth-first fashion */
static void
build_summary_rec(GHashTable *have, GPtrArray *summary, CamelFolderThreadNode *node)
{
    while (node) {
        if (node->message)
            g_hash_table_insert(have, (char *)camel_message_info_uid(node->message), node->message);
        g_ptr_array_add(summary, node);
        if (node->child)
            build_summary_rec(have, summary, node->child);
        node = node->next;
    }
}

void
camel_folder_thread_messages_add(CamelFolderThread *thread, GPtrArray *summary)
{
    GPtrArray *all;
    int i;
    GHashTable *table;

    /* Instead of working out all the complex in's and out's of
       trying to do an incremental summary generation, just redo the whole
       thing with the summary in the current order - so it comes out
       in the same order */

    all = g_ptr_array_new();
    table = g_hash_table_new(g_str_hash, g_str_equal);
    build_summary_rec(table, all, thread->tree);
    for (i=0;i<summary->len;i++) {
        CamelMessageInfo *info = summary->pdata[i];

        /* check its not already there, we dont want duplicates */
        if (g_hash_table_lookup(table, camel_message_info_uid(info)) == NULL)
            g_ptr_array_add(all, info);
    }
    g_hash_table_destroy(table);

    /* reset the tree, and rebuild fully */
    thread->tree = NULL;
    e_memchunk_empty(thread->node_chunks);
    thread_summary(thread, all);
}

static void
remove_uid_node_rec(CamelFolderThread *thread, GHashTable *table, CamelFolderThreadNode **list, CamelFolderThreadNode *parent)
{
    CamelFolderThreadNode *prev = NULL;
    CamelFolderThreadNode *node, *next, *child, *rest;

    node = (CamelFolderThreadNode *)list;
    next = node->next;
    while (next) {

        if (next->child)
            remove_uid_node_rec(thread, table, &next->child, next);

        /* do we have a node to remove? */
        if (next->message && g_hash_table_lookup(table, (char *)camel_message_info_uid(node->message))) {
            child = next->child;
            if (child) {
                /*
                  node
                  next
                   child
                   lchild
                  rest

                  becomes:
                  node
                  child
                  lchild
                  rest
                */

                rest = next->next;
                node->next = child;
                e_memchunk_free(thread->node_chunks, next);
                next = child;
                do {
                    lchild = child;
                    child->parent = parent;
                    child = child->next;
                } while (child);
                lchild->next = rest;
            } else {
                /*
                  node
                  next
                  rest
                  becomes:
                  node
                  rest */
                node->next = next->next;
                e_memchunk_free(thread->node_chunks, next);
                next = node->next;
            }
        } else {
            node = next;
            next = node->next;
        }
    }
}

void
camel_folder_thread_messages_remove(CamelFolderThread *thread, GPtrArray *uids)
{
    GHashTable *table;
    int i;

    table = g_hash_table_new(g_str_hash, g_str_equal);
    for (i=0;i<uids->len;i++)
        g_hash_table_insert(table, uids->pdata[i], uids->pdata[i]);

    remove_uid_node_rec(thread, table, &thread->tree, NULL);
    g_hash_table_destroy(table);
}

#endif