//  ------------------------------------------------------------------
//  GoldED+
//  Copyright (C) 1990-1999 Odinn Sorensen
//  Copyright (C) 1999-2000 Alexander S. Aganichev
//  ------------------------------------------------------------------
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License as
//  published by the Free Software Foundation; either version 2 of the
//  License, or (at your option) any later version.
//
//  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
//  ------------------------------------------------------------------
//  $Id$
//  ------------------------------------------------------------------
//  Message lister.
//  ------------------------------------------------------------------

#include <golded.h>


//  ------------------------------------------------------------------

extern GMsg* reader_msg;

static int mlst_bysiz;
static int mlst_tosiz;
static int mlst_resiz;
static int fldadd1;
static int fldadd2;


//  ------------------------------------------------------------------

const byte MLST_HIGH_FROM   =  1;
const byte MLST_HIGH_TO     =  2;
const byte MLST_HIGH_BOOK   =  4;
const byte MLST_HIGH_MARK   =  8;
const byte MLST_HIGH_UNREAD = 16;
const byte MLST_HIGH_UNSENT = 32;


//  ------------------------------------------------------------------

inline void mlst_with_date(int with_date) {

  if(with_date) {
    mlst_bysiz = 19;
    mlst_tosiz = 19;
    mlst_resiz = 20;
  }
  else {
    mlst_bysiz = 19+3;
    mlst_tosiz = 19+3;
    mlst_resiz = 20+4;
  }
}


//  ------------------------------------------------------------------

class GMsgList : public gwinpick {

  gwindow        window;
  GMsg           msg;
  vector<MLst>   mlst;
  uint           msgmark2;

  void open();                        // Called after window is opened
  void close();                       // Called after window is closed
  void update_title();
  void do_delayed();
  void print_line(uint idx, uint pos, bool isbar);
  bool handle_key();                  // Handles keypress
  void ReadMlst(int n);

public:

  void Run();

  GMsgList() { memset(&msg, 0, sizeof(GMsg)); };
  ~GMsgList() { ResetMsg(&msg); };
};


//  ------------------------------------------------------------------

void GMsgList::open() {

  window.openxy(ypos, xpos, ylen+2, xlen+2, btype, battr, wattr, sbattr);
  update_title();
  center(CFG->displistcursor);
}


//  ------------------------------------------------------------------

void GMsgList::close() {

  window.close();
}


//  ------------------------------------------------------------------

void GMsgList::ReadMlst(int n) {

  MLst* ml = &mlst[n];

  if(ml->initialized)
    return;

  ml->high = 0;

  strcpy(ml->marks, "  ");

  ml->msgno = AA->Msgn.CvtReln(n + 1);

  if(AA->bookmark == AA->Msgn.CvtReln(n + 1)) {
    ml->marks[0] = MMRK_BOOK;
    ml->high |= MLST_HIGH_BOOK;
  }

  if(AA->Mark.Count()) {
    if(AA->Mark.Find(ml->msgno)) {
      ml->marks[1] = MMRK_MARK;
      ml->high |= MLST_HIGH_MARK;
    }
  }

  if(AA->Msglistfast()) {
    AA->LoadHdr(&msg, ml->msgno);
  }
  else {
    AA->LoadMsg(&msg, ml->msgno, CFG->dispmargin-(int)CFG->switches.get(disppagebar));
  }
  ml->goldmark = goldmark;

  for(vector<Node>::iterator x = CFG->username.begin(); x != CFG->username.end(); x++) {
    if(strieql(msg.By(), x->name)) {
      ml->high |= MLST_HIGH_FROM;
      msg.attr.fmu1();
    }
    if(strieql(msg.to, x->name)) {
      ml->high |= MLST_HIGH_TO;
      msg.attr.tou1();
    }
  }
  if(strieql(msg.to, AA->Internetaddress())) {
    ml->high |= MLST_HIGH_TO;
    msg.attr.tou1();
  }

  // Highlight FROM if local
  if(CFG->switches.get(displocalhigh) and msg.attr.loc())
    ml->high |= MLST_HIGH_FROM;

  // Highlight if unread
  if(msg.timesread == 0 and CFG->switches.get(highlightunread))
    ml->high |= MLST_HIGH_UNREAD;

  // Highlight if unsent
  if(msg.attr.uns()and not msg.attr.rcv() and not msg.attr.del())
    ml->high |= MLST_HIGH_UNSENT;

  ml->written = msg.written;
  ml->arrived = msg.arrived;
  ml->received = msg.received;
  strcpy(ml->by, msg.By());
  strcpy(ml->to, msg.To());
  strcpy(ml->re, msg.re);
}


//  ------------------------------------------------------------------

void GMsgList::do_delayed() {
  
  // Update header and statusline
  if(AA->Msglistheader()) {
    ReadMlst(index);
    AA->LoadMsg(&msg, mlst[index].msgno, CFG->dispmargin-(int)CFG->switches.get(disppagebar));
    mlst[index].goldmark = goldmark;
    int mlstwh = whandle();
    HeaderView->Use(AA, &msg);
    HeaderView->Paint();
    wactiv_(mlstwh);
  }

  if(CFG->switches.get(msglistviewsubj)) {
    ReadMlst(index);
    wtitle(mlst[index].re, TCENTER|TBOTTOM, tattr);
  }

  if(CFG->switches.get(msglistpagebar))
    wscrollbar(W_VERT, maximum_index+1, maximum_index, index);

  update_statuslinef(LNG->MsgLister, index+1, maximum_index+1, maximum_index-index);
}


//  ------------------------------------------------------------------

void GMsgList::update_title() {

  int bycol = 8;
  int tocol = bycol + mlst_bysiz + 1 + fldadd1;
  int recol = tocol + mlst_tosiz + 1 + fldadd1;
  int dtcol = recol + mlst_resiz + 1 + fldadd2;
  if(AA->Msglistwidesubj())
    recol = tocol;

  window.title(NULL, tattr, TCENTER);
  window.message(CFG->switches.get(disprealmsgno) ? LNG->MsgReal : LNG->Msg, TP_BORD, 3, tattr);
  window.message(LNG->FromL, TP_BORD, bycol, tattr);
  if(not AA->Msglistwidesubj())
    window.message(LNG->ToL, TP_BORD, tocol, tattr);
  window.message(LNG->SubjL, TP_BORD, recol, tattr);
  switch(AA->Msglistdate()) {
    case MSGLISTDATE_WRITTEN:   window.message(LNG->Written, TP_BORD, dtcol, tattr);   break;
    case MSGLISTDATE_ARRIVED:   window.message(LNG->Arrived, TP_BORD, dtcol, tattr);   break;
    case MSGLISTDATE_RECEIVED:  window.message(LNG->Received, TP_BORD, dtcol, tattr);  break;
  }
}


//  ------------------------------------------------------------------

void GMsgList::print_line(uint idx, uint pos, bool isbar) {

  int bycol = 7;
  int tocol = bycol + mlst_bysiz + 1 + fldadd1;
  int bysiz = mlst_bysiz + fldadd1;
  int tosiz = mlst_tosiz + fldadd1;
  int resiz = mlst_resiz + fldadd2;

  ReadMlst(idx);
  MLst* ml = &mlst[idx];

  int wattr_, hattr_, mattr_;
  if(isbar) {
    wattr_ = sattr;
    hattr_ = sattr;
    mattr_ = sattr;
  }
  else if(ml->high & MLST_HIGH_UNSENT) {
    wattr_ = C_MENUW_UNSENT;
    hattr_ = C_MENUQ_UNSENTHIGH;
    mattr_ = hattr;
  }
  else if(ml->high & MLST_HIGH_UNREAD) {
    wattr_ = C_MENUW_UNREAD;
    hattr_ = C_MENUQ_UNREADHIGH;
    mattr_ = hattr;
  }
  else {
    wattr_ = wattr;
    hattr_ = hattr;
    mattr_ = hattr;
  }

  char buf[256];

  if(AA->Msglistwidesubj()) {
    resiz += tosiz + 1;
    tosiz = 0;
  }

  char nbuf[33], dbuf[20];
  strcpy(dbuf, LNG->n_a);

  time_t dt = 0;
  switch(AA->Msglistdate()) {
    case MSGLISTDATE_WRITTEN:   dt = ml->written;   break;
    case MSGLISTDATE_ARRIVED:   dt = ml->arrived;   break;
    case MSGLISTDATE_RECEIVED:  dt = ml->received;  break;
  }
  if(dt)
    strftimei(dbuf, 20, "%d %b %y", gmtime(&dt));
  if(AA->Msglistdate())
    strsetsz(dbuf, 10);
  else
    *dbuf = NUL;
  sprintf(nbuf, "%5lu", CFG->switches.get(disprealmsgno) ? ml->msgno : AA->Msgn.ToReln(ml->msgno));
  sprintf(buf, "%-5.5s%s%-*.*s %-*.*s%s%-*.*s %s",
    nbuf, ml->marks,
    bysiz, bysiz, ml->by,
    tosiz, tosiz, ml->to,
    (tosiz ? " " : ""),
    resiz, resiz, ml->re,
    dbuf
  );

  window.prints(pos, 0, wattr_, buf);

  if(ml->high & (MLST_HIGH_BOOK|MLST_HIGH_MARK))
    window.prints(pos, 5, mattr_, ml->marks);
  if(ml->high & MLST_HIGH_FROM)
    window.printns(pos, bycol, hattr_, ml->by, bysiz);
  if((ml->high & MLST_HIGH_TO) and not AA->Msglistwidesubj())
    window.printns(pos, tocol, hattr_, ml->to, tosiz);

  goldmark = ml->goldmark;
}


//  ------------------------------------------------------------------

bool GMsgList::handle_key() {

  gkey kk;

  if(key < KK_Commands) {
    // See if it's a listkey
    kk = SearchKey(key, ListKey, ListKeys);
    if(kk)
      key = kk;
    else {
      // If not a listkey, see if it matches a readkey
      if(not IsMacro(key, KT_M)) {
        kk = SearchKey(key, ReadKey, ReadKeys);
        if(kk)
          key = kk;
      }
    }
  }

  ReadMlst(index);

  switch(key) {
    case KK_ListGotoPrev:
      key = Key_Up;
      default_handle_key();
      break;

    case KK_ListGotoNext:
      key = Key_Dwn;
      default_handle_key();
      break;

    case KK_ListGotoFirst:
      key = Key_Home;
      default_handle_key();
      break;

    case KK_ListGotoLast:
      key = Key_End;
      default_handle_key();
      break;

    case KK_ListAskExit:
      {
        GMenuQuit MenuQuit;
        aborted = gkbd.quitall = (MenuQuit.Run());
        if(gkbd.quitall)
          AA->bookmark = AA->Msgn.CvtReln(msgmark2);
      }
      break;

    case KK_ListQuitNow:
      gkbd.quitall = true;
      ///////////////// Drop Through

    case KK_ListAbort:
      aborted = true;
      AA->bookmark = AA->Msgn.CvtReln(msgmark2);
      ///////////////// Drop Through

    case KK_ListSelect:
      return false;

    case KK_ListToggleMark:
      {
        ulong temp = AA->Mark.Find(mlst[index].msgno);
        if(temp) {
          AA->Mark.DelReln(temp);
        }
        else {
          AA->Mark.Add(mlst[index].msgno);
        }
      }
      if(index < maximum_index)
        cursor_down();
      else
        display_bar();
      break;

    case KK_ListToggleBookMark:
      if(AA->bookmark == mlst[index].msgno) {
        mlst[index].marks[0] = ' ';
        AA->bookmark = 0;
        mlst[index].high &= ~MLST_HIGH_BOOK;
        display_bar();
      }
      else {
        long prevbm = AA->Msgn.ToReln(AA->bookmark-1);
        long newbm = index;
        AA->bookmark = mlst[index].msgno;
        mlst[index].marks[0] = MMRK_BOOK;
        mlst[index].high |= MLST_HIGH_BOOK;
        display_bar();
        if(prevbm) {
          if(in_range((long)position + prevbm - newbm, 0l, (long)maximum_position)) {
            ReadMlst(prevbm);
            mlst[prevbm].marks[0] = ' ';
            mlst[prevbm].high &= ~MLST_HIGH_BOOK;
            index = prevbm;
            position += prevbm - newbm;
            display_line();
            index = newbm;
            position -= prevbm - newbm;
          }
        }
      }
      break;

    case KK_ListGotoBookMark:
      if(AA->bookmark) {
        long prevbm = AA->Msgn.ToReln(AA->bookmark-1);
        long newbm = index;
        index = prevbm;
        AA->bookmark = mlst[newbm].msgno;
        if(in_range((long)position + prevbm - newbm, 0l, (long)maximum_position)) {
          mlst[newbm].marks[0] = MMRK_BOOK;
          mlst[newbm].high |= MLST_HIGH_BOOK;
          index = newbm;
          display_line();
          index = prevbm;
          ReadMlst(index);
          mlst[index].marks[0] = ' ';
          mlst[index].high &= ~MLST_HIGH_BOOK;
          position += prevbm - newbm;
          display_bar();
        }
        else
          center(CFG->displistcursor);
      }
      else
        SayBibi();
      break;

    case KK_ListMarkingOptions:
      {
        uint lrbak = AA->lastread();
        AA->set_lastread(index + 1);
        msg.msgno = AA->Msgn.CvtReln(AA->lastread());
        MarkMsgs(&msg);
        AA->set_lastread(lrbak);
        update();
      }
      break;

    case KK_ListDosShell:
      DosShell();
      break;

    case KK_ListToggleWideSubj:
      AA->ToggleMsglistwidesubj();
      update_title();
      update();
      break;

    case KK_ListToggleDate:
      AA->NextMsglistdate();
      mlst_with_date(AA->Msglistdate());
      update_title();
      update();
      break;

    case KK_ReadMessageList:
      center(CFG->displistcursor);
      break;

    case Key_Tick:
      CheckTick(KK_ListQuitNow);
      break;

    case KK_ListUndefine:
      break;

    default:
      if(not PlayMacro(key, KT_M)) {
        if(gkbd.kbuf == NULL)
          kbput(key);
        switch(key) {
          case KK_ListAbort:
          case KK_ReadNewArea:
            aborted = true;
        }
        return false;
      }
  }
  return true;
}


//  ------------------------------------------------------------------

void GMsgList::Run() {

  ypos    = AA->Msglistheader() ? 6 : 1;      // Window Starting Row
  xpos    = 0;                                // Window Starting Column
  ylen    = MAXROW-3-ypos;                    // Window Height
  xlen    = MAXCOL-2;                         // Window Width
  btype   = W_BMENU;                          // Window Border Type
  battr   = C_MENUB;                          // Window Border Color
  wattr   = C_MENUW;                          // Window Color
  tattr   = C_MENUT;                          // Window Title Color
  sattr   = C_MENUS;                          // Window Selection Bar Color
  hattr   = C_MENUQ;                          // Window Highlight Color
  sbattr  = C_MENUPB;                         // Window Scrollbar Color
  title   = LNG->ThreadlistTitle;             // Window Title
  helpcat = H_MessageBrowser;                 // Window Help Category
  listwrap  = CFG->switches.get(displistwrap);

  index = AA->Msgn.ToReln(reader_msg->msgno)-1;
  minimum_index = 0;
  maximum_index = AA->Msgn.Count()-1;
  msgmark2 = AA->Msgn.ToReln(AA->bookmark);

  if(AA->Msglistdate() != MSGLISTDATE_NONE) {
    if(AA->Msglistdate() != MSGLISTDATE_WRITTEN) {
      if(AA->ishudson() or AA->isgoldbase() or AA->ispcboard())
        AA->SetMsglistdate(MSGLISTDATE_WRITTEN);
      else if((AA->isezycom() or AA->isfido()) and (AA->Msglistdate() == MSGLISTDATE_RECEIVED))
        AA->SetMsglistdate(MSGLISTDATE_WRITTEN);
    }
  }

  mlst_with_date(AA->Msglistdate());

  fldadd1 = (MAXCOL-80)/3;
  fldadd2 = (MAXCOL-80) - (fldadd1*2);

  mlst.clear();

  MLst dummy_mlst;
  dummy_mlst.initialized = false;
  for(uint i=0; i<= maximum_index; i++)
    mlst.push_back(dummy_mlst);

  maximum_position = MinV((uint)maximum_index, (uint)ylen - 1);

  if(mlst.size() != 0)
    run_picker();
  else
    aborted = true;

  if(not aborted) {
    ReadMlst(index);
    AA->set_lastread(AA->Msgn.ToReln(mlst[index].msgno));
  }
}


//  ------------------------------------------------------------------

void MessageBrowse() {

  if(AA->Msgn.Count()) {
    GMsgList p;
    _in_msglist = true;
    p.Run();
    _in_msglist = false;
    if(AA->PMrk.Tags() == 0)
      AA->isreadpm = false;
    if(AA->Mark.Count() == 0)
      AA->isreadmark = false;
    if(gkbd.quitall)
      QuitNow();
  }
}


//  ------------------------------------------------------------------

class ThreadEntry {

public:
  ulong msgno;
  ulong replyto;
  ulong reply1st;
  ulong replynext;
};

#define MAX_LEVEL 20

class GThreadlist : public gwinpick {

private:

  gwindow               window;
  GMsg                  msg;
  vector<ThreadEntry>   list;
  ThreadEntry           t;
  uint                  h_offset;

  void BuildThreadIndex(dword msgno);
  void recursive_build(ulong msgn, ulong rn);
  void GenTree(char* buf2, int idx);
  void update_title();
  bool NextThread(bool next);

public:

  void open();                        // Called after window is opened
  void close();                       // Called after window is closed
  void print_line(uint idx, uint pos, bool isbar);
  void do_delayed();
  bool handle_key();                  // Handles keypress

  void Run();

  GThreadlist() { memset(&msg, 0, sizeof(GMsg)); };
  ~GThreadlist() { ResetMsg(&msg); };
};


//  ------------------------------------------------------------------

void GThreadlist::open() {

  window.openxy(ypos, xpos, ylen+2, xlen+2,  btype, battr, 7);
  update_title();

  center(CFG->displistcursor);
}


//  ------------------------------------------------------------------

void GThreadlist::update_title() {

  window.title(title, tattr);
  window.message(CFG->switches.get(disprealmsgno) ? LNG->MsgReal : LNG->Msg, TP_BORD, 3, tattr);

  switch(AA->Msglistdate()) {
    case MSGLISTDATE_WRITTEN:   window.message(LNG->Written, TP_BORD, xlen-9, tattr);   break;
    case MSGLISTDATE_ARRIVED:   window.message(LNG->Arrived, TP_BORD, xlen-9, tattr);   break;
    case MSGLISTDATE_RECEIVED:  window.message(LNG->Received, TP_BORD, xlen-9, tattr);  break;
  }
}


//  ------------------------------------------------------------------

void GThreadlist::do_delayed() {
  
  // Update header and statusline
  if(AA->Msglistheader()) {
    AA->LoadMsg(&msg, list[index].msgno, CFG->dispmargin-(int)CFG->switches.get(disppagebar));
    int mlstwh = whandle();
    HeaderView->Use(AA, &msg);
    HeaderView->Paint();
    wactiv_(mlstwh);
  }

  if(CFG->switches.get(msglistviewsubj))
    wtitle(msg.re, TCENTER|TBOTTOM, tattr);

  if(CFG->switches.get(msglistpagebar))
    wscrollbar(W_VERT, maximum_index+1, maximum_index, index);

  update_statuslinef(LNG->MsgLister, index+1, maximum_index+1, maximum_index-index);
}


//  ------------------------------------------------------------------

void GThreadlist::close() {

  window.close();
  ResetMsg(&msg);
}


//  ------------------------------------------------------------------

void GThreadlist::GenTree(char* buf, int idx) {

#ifdef KOI8
  static char graph[4]="���";
#else
  static char graph_ibmpc[4]="���";
  static char graph[4]="";

  if(graph[0] == NUL) {
    int table = LoadCharset(NULL, NULL, 1);
    int level = LoadCharset("IBMPC", CFG->xlatlocalset);
    XlatStr(graph, graph_ibmpc, level, CharTable);
    if(table == -1)
      LoadCharset(CFG->xlatimport, CFG->xlatlocalset);
    else
      LoadCharset(CFG->xlatcharset[table].imp, CFG->xlatcharset[table].exp);
  }
#endif

  t = list[idx];

  uint level = 0;
  char* q = &buf[1000];

  *q-- = NUL;
  *q-- = ' ';
  *q-- = (t.replynext) ? graph[0] : graph[1];

  while(t.replyto) {
    for(uint i=0; i<list.size(); i++) {
      if(list[i].msgno == t.replyto) {
        t = list[i];
        level++;
        break;
      }
    }
    *q-- = ' ';
    *q-- = (t.replynext) ? graph[2] :  ' ';
  }

  t = list[idx];

  if(level) {
    q+=2;
    memcpy(buf, q, strlen(q)+1);
  }
  else {
    buf[0] = ' '; buf[1] = NUL;
  }
}


//  ------------------------------------------------------------------

void GThreadlist::print_line(uint idx, uint pos, bool isbar) {

  char buf[256];
  char buf2[1001];
  int attrh, attrw;
  uint tdlen;

  t = list[idx];

  tdlen = xlen - ((AA->Msglistdate() == MSGLISTDATE_NONE) ? 8 : 18);

  AA->LoadHdr(&msg, t.msgno);

  if(msg.attr.uns() and not msg.attr.rcv() and not msg.attr.del()) {
    attrw = C_MENUW_UNSENT;
    attrh = C_MENUQ_UNSENTHIGH;
  }
  else if(CFG->switches.get(highlightunread) and (msg.timesread == 0)) {
    attrh = C_MENUQ_UNREADHIGH;
    attrw = C_MENUW_UNREAD;
  }
  else {
    attrw = wattr;
    attrh = hattr;
  }

  GenTree(buf2, idx);
  
  #if defined(__UNIX__) and not defined(__USE_NCURSES__)
  gvid_boxcvt(buf2);
  #endif
  
  char marks[3];

  strcpy(marks, "  ");

  if(AA->bookmark == t.msgno)
    marks[0] = MMRK_BOOK;

  if(AA->Mark.Count()) {
    if(AA->Mark.Find(t.msgno))
      marks[1] = MMRK_MARK;
  }

  sprintf(buf, "%6lu  %*c", CFG->switches.get(disprealmsgno) ? t.msgno : AA->Msgn.ToReln(t.msgno), tdlen, ' ');

  if(AA->Msglistdate() != MSGLISTDATE_NONE) {
    char dbuf[11];
    time_t dt = 0;

    memset(dbuf, ' ', 10);
    dbuf[10] = NUL;
    strncpy(dbuf, LNG->n_a, strlen(LNG->n_a));

    switch(AA->Msglistdate()) {
      case MSGLISTDATE_WRITTEN:   dt = msg.written;   break;
      case MSGLISTDATE_ARRIVED:   dt = msg.arrived;   break;
      case MSGLISTDATE_RECEIVED:  dt = msg.received;  break;
    }

    if(dt)
      strftimei(dbuf, 20, "%d %b %y", gmtime(&dt));
    strcat(buf, dbuf);
  }

  window.prints(pos, 0, isbar ? sattr : attrw, buf);
  window.prints(pos, 6, isbar ? sattr : hattr, marks);

  if(strlen(buf2) > h_offset) {
    strxcpy(buf, &buf2[h_offset], tdlen);
    window.prints(pos, 8, isbar ? (sattr|ACSET) : (wattr|ACSET), buf);
  }

  int attr = attrw;

  for(vector<Node>::iterator x = CFG->username.begin(); x != CFG->username.end(); x++)
    if(strieql(msg.By(), x->name)) {
      attr = attrh;
      break;
    }

  if((strlen(buf2) > h_offset) and (strlen(&buf2[h_offset]) < tdlen)) {
    strxcpy(buf, msg.By(), tdlen - strlen(&buf2[h_offset]));
    window.prints(pos, 8+strlen(&buf2[h_offset]), isbar ? sattr : attr, buf);
  }
}


//  ------------------------------------------------------------------

void GThreadlist::recursive_build(ulong msgn, ulong rn) {

  ulong oldmsgno = msg.msgno;

  if(AA->Msgn.ToReln(msgn) and AA->LoadHdr(&msg, msgn)) {

    t.msgno     = msgn;
    t.replyto   = msg.link.to();
    t.reply1st  = msg.link.first();
    t.replynext = rn;

    if(not AA->Msgn.ToReln(t.replyto))
      t.replyto = 0;
    if(not AA->Msgn.ToReln(t.reply1st))
      t.reply1st = 0;
    if(not AA->Msgn.ToReln(t.replynext))
      t.replynext = 0;

    uint j;
    bool found = false;
    for(j=0; j<list.size(); j++) {
      if(list[j].msgno == t.replyto) {
        found = true;
        break;
      }
    }

    if(found and list[j].msgno != t.replyto)
      list.erase(&list[j]);

    if(found or list.size() == 0)
      list.push_back(t);

    recursive_build(msg.link.first(), msg.link.list(0));

    for(int n=0; n < msg.link.list_max()-1; n++) {
      if(msg.link.list(n)) {
        recursive_build(msg.link.list(n), msg.link.list(n+1));
      } else
        break;
    }
    AA->LoadHdr(&msg, oldmsgno);
  }
}


//  ------------------------------------------------------------------

void GThreadlist::BuildThreadIndex(dword msgn) {

  w_info(LNG->Wait);

  index = maximum_index = position = maximum_position = 0;
  list.clear();

  AA->LoadHdr(&msg, msgn);

  ulong msgno = msg.link.to();

  // Search backwards
  while(AA->Msgn.ToReln(msgno)) {

    if(not AA->LoadHdr(&msg, msgno))
      msg.link.to_set(0);

    msgno = msg.link.to();
  }

  recursive_build(msg.msgno, 0);

  w_info(NULL);

  minimum_index    = 0;
  maximum_index    = list.size() - 1;
  maximum_position = MinV((uint) list.size() - 1, (uint) ylen - 1);
  index            = 0;
  h_offset         = 0;

  for(uint i = 0; i<list.size(); i++) {
    if(list[i].msgno == msgn)
      index = i;
  }
}


//  ------------------------------------------------------------------

bool GThreadlist::NextThread(bool next) {

  for(uint m = AA->Msgn.ToReln(reader_msg->msgno)-1;
      next ? m < AA->Msgn.Count() : m;
      next ? m++ : m--) {

    dword msgn = AA->Msgn[m];
    bool found = false;

    for(uint i = 0; i<list.size(); i++) {
      if(list[i].msgno == msgn) {
        found = true;
        break;
      }
    }

    if(not found) {
      reader_msg->msgno = msgn;
      AA->set_lastread(AA->Msgn.ToReln(msgn));

      BuildThreadIndex(msgn);
      return true;
    }
  }
  return true;
}

//  ------------------------------------------------------------------


bool GThreadlist::handle_key() {

  gkey kk;

  if(key < KK_Commands) {
    key = key_tolower(key);
    // See if it's a listkey
    kk = SearchKey(key, ListKey, ListKeys);
    if(kk)
      key = kk;
    else {
      // If not a listkey, see if it matches a readkey
      if(not IsMacro(key, KT_M)) {
        kk = SearchKey(key, ReadKey, ReadKeys);
        if(kk)
          key = kk;
      }
    }
  }

  switch(key) {
    case KK_ListGotoPrev:
    case KK_ListGotoNext:
      NextThread((key == KK_ListGotoNext));
      if(list.size() <= 1)
        return false;
      center(CFG->displistcursor);
      break;

    case KK_ListGotoFirst:
      key = Key_Home;
      default_handle_key();
      break;

    case KK_ListGotoLast:
      key = Key_End;
      default_handle_key();
      break;

    case KK_ListAskExit:
      {
        GMenuQuit MenuQuit;
        aborted = gkbd.quitall = (MenuQuit.Run());
      }
      break;

    case KK_ListQuitNow:
      gkbd.quitall = true;
      ///////////////// Drop Through

    case KK_ListAbort:
      aborted = true;
      ///////////////// Drop Through

    case KK_ListSelect:
      return false;

    case KK_ListToggleMark:
    {
      ulong temp = AA->Mark.Find(list[index].msgno);
      if(temp) {
        AA->Mark.DelReln(temp);
      }
      else {
        AA->Mark.Add(list[index].msgno);
      }

      if(index < maximum_index)
        cursor_down();
      else
        display_bar();
      break;
    }

    case KK_ListDosShell:
      DosShell();
      break;

    case KK_ListToggleDate:
      AA->NextMsglistdate();
      mlst_with_date(AA->Msglistdate());
      update_title();
      update();
      break;

    case Key_Tick:
      CheckTick(KK_ListQuitNow);
      break;

    case KK_ListUndefine:
      break;

    default:
      if(not PlayMacro(key, KT_M)) {
        if(gkbd.kbuf == NULL)
          kbput(key);
        switch(key) {
          case KK_ListAbort:
          case KK_ReadNewArea:
            aborted = true;
        }
        return false;
      }
  }
  return true;
}


//  ------------------------------------------------------------------

void GThreadlist::Run() {

  ypos    = AA->Msglistheader() ? 6 : 1;      // Window Starting Row
  xpos    = 0;                                // Window Starting Column
  ylen    = MAXROW-3-ypos;                    // Window Height
  xlen    = MAXCOL-2;                         // Window Width
  btype   = W_BMENU;                          // Window Border Type
  battr   = C_MENUB;                          // Window Border Color
  wattr   = C_MENUW;                          // Window Color
  tattr   = C_MENUT;                          // Window Title Color
  sattr   = C_MENUS;                          // Window Selection Bar Color
  hattr   = C_MENUQ;                          // Window Highlight Color
  sbattr  = C_MENUPB;                         // Window Scrollbar Color
  title   = LNG->ThreadlistTitle;             // Window Title
  helpcat = H_ReplyThread;                    // Window Help Category
  listwrap  = CFG->switches.get(displistwrap);

  BuildThreadIndex(reader_msg->msgno);

  if(list.size() > 1)
    run_picker();
  else {
    w_info(LNG->NoThreadlist);
    waitkeyt(5000);
    w_info(NULL);
    aborted = true;
  }

  if(not aborted)
    AA->set_lastread(AA->Msgn.ToReln(list[index].msgno));
}


//  ------------------------------------------------------------------

void MsgThreadlist() {

  GThreadlist p;

  p.Run();

}


//  ------------------------------------------------------------------