mview.c

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#include "config.h"
#include <string.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "mview.h"
#include "imap/lib.h"
#include "ncrypt/lib.h"
#include "pattern/lib.h"
#include "mx.h"
#include "thread.h"

void mview_free(struct MailboxView **ptr)
{
  if (!ptr || !*ptr)
    return;
 
  struct MailboxView *mv = *ptr;
 
  struct EventMview ev_m = { mv };
  mutt_debug(LL_NOTIFY, "NT_MVIEW_DELETE: %p\n", (void *) mv);
  notify_send(mv->notify, NT_MVIEW, NT_MVIEW_DELETE, &ev_m);
 
  if (mv->mailbox)
  {
    notify_observer_remove(mv->mailbox->notify, mview_mailbox_observer, mv);
 
    // Disconnect the Emails before freeing the Threads
    for (int i = 0; i < mv->mailbox->msg_count; i++)
    {
      struct Email *e = mv->mailbox->emails[i];
      if (!e)
        continue;
      e->thread = NULL;
      e->threaded = false;
    }
  }
 
  mutt_thread_ctx_free(&mv->threads);
  notify_free(&mv->notify);
  FREE(&mv->pattern);
  mutt_pattern_free(&mv->limit_pattern);
 
  *ptr = NULL;
  FREE(&mv);
}

struct MailboxView *mview_new(struct Mailbox *m, struct Notify *parent)
{
  if (!m)
    return NULL;
 
  struct MailboxView *mv = MUTT_MEM_CALLOC(1, struct MailboxView);
 
  mv->notify = notify_new();
  notify_set_parent(mv->notify, parent);
  struct EventMview ev_m = { mv };
  mutt_debug(LL_NOTIFY, "NT_MVIEW_ADD: %p\n", (void *) mv);
  notify_send(mv->notify, NT_MVIEW, NT_MVIEW_ADD, &ev_m);
  // If the Mailbox is closed, mv->mailbox must be set to NULL
  notify_observer_add(m->notify, NT_MAILBOX, mview_mailbox_observer, mv);
 
  mv->mailbox = m;
  mv->threads = mutt_thread_ctx_init(mv);
  mv->msg_in_pager = -1;
  mv->collapsed = false;
  mview_update(mv);
 
  return mv;
}

static void mview_clean(struct MailboxView *mv)
{
  FREE(&mv->pattern);
  mutt_pattern_free(&mv->limit_pattern);
  if (mv->mailbox)
    notify_observer_remove(mv->mailbox->notify, mview_mailbox_observer, mv);
 
  struct Notify *notify = mv->notify;
  struct Mailbox *m = mv->mailbox;
  memset(mv, 0, sizeof(struct MailboxView));
  mv->notify = notify;
  mv->mailbox = m;
}

void mview_update(struct MailboxView *mv)
{
  if (!mv || !mv->mailbox)
    return;
 
  struct Mailbox *m = mv->mailbox;
 
  mutt_hash_free(&m->subj_hash);
  mutt_hash_free(&m->id_hash);
 
  /* reset counters */
  m->msg_unread = 0;
  m->msg_flagged = 0;
  m->msg_new = 0;
  m->msg_deleted = 0;
  m->msg_tagged = 0;
  m->vcount = 0;
  m->changed = false;
 
  mutt_clear_threads(mv->threads);
 
  const bool c_score = cs_subset_bool(NeoMutt->sub, "score");
  struct Email *e = NULL;
  for (int msgno = 0; msgno < m->msg_count; msgno++)
  {
    e = m->emails[msgno];
    if (!e)
      continue;
 
    if (WithCrypto)
    {
      /* NOTE: this _must_ be done before the check for mailcap! */
      e->security = crypt_query(e->body);
    }
 
    if (mview_has_limit(mv))
    {
      e->vnum = -1;
    }
    else
    {
      m->v2r[m->vcount] = msgno;
      e->vnum = m->vcount++;
    }
    e->msgno = msgno;
 
    if (e->env->supersedes)
    {
      struct Email *e2 = NULL;
 
      if (!m->id_hash)
        m->id_hash = mutt_make_id_hash(m);
 
      e2 = mutt_hash_find(m->id_hash, e->env->supersedes);
      if (e2)
      {
        e2->superseded = true;
        if (c_score)
          mutt_score_message(mv->mailbox, e2, true);
      }
    }
 
    /* add this message to the hash tables */
    if (m->id_hash && e->env->message_id)
      mutt_hash_insert(m->id_hash, e->env->message_id, e);
    if (m->subj_hash && e->env->real_subj)
      mutt_hash_insert(m->subj_hash, e->env->real_subj, e);
    mutt_label_hash_add(m, e);
 
    if (c_score)
      mutt_score_message(mv->mailbox, e, false);
 
    if (e->changed)
      m->changed = true;
    if (e->flagged)
      m->msg_flagged++;
    if (e->deleted)
      m->msg_deleted++;
    if (e->tagged)
      m->msg_tagged++;
    if (!e->read)
    {
      m->msg_unread++;
      if (!e->old)
        m->msg_new++;
    }
  }
 
  /* rethread from scratch */
  mutt_sort_headers(mv, true);
}

static void update_tables(struct MailboxView *mv)
{
  if (!mv || !mv->mailbox)
    return;
 
  struct Mailbox *m = mv->mailbox;
 
  int i, j, padding;
 
  /* update memory to reflect the new state of the mailbox */
  m->vcount = 0;
  mv->vsize = 0;
  m->msg_tagged = 0;
  m->msg_deleted = 0;
  m->msg_new = 0;
  m->msg_unread = 0;
  m->changed = false;
  m->msg_flagged = 0;
  padding = mx_msg_padding_size(m);
  const bool c_maildir_trash = cs_subset_bool(NeoMutt->sub, "maildir_trash");
  for (i = 0, j = 0; i < m->msg_count; i++)
  {
    if (!m->emails[i])
      break;
    if (!m->emails[i]->quasi_deleted &&
        (!m->emails[i]->deleted || ((m->type == MUTT_MAILDIR) && c_maildir_trash)))
    {
      if (i != j)
      {
        m->emails[j] = m->emails[i];
        m->emails[i] = NULL;
      }
      m->emails[j]->msgno = j;
      if (m->emails[j]->vnum != -1)
      {
        m->v2r[m->vcount] = j;
        m->emails[j]->vnum = m->vcount++;
        struct Body *b = m->emails[j]->body;
        mv->vsize += b->length + b->offset - b->hdr_offset + padding;
      }
 
      m->emails[j]->changed = false;
      m->emails[j]->env->changed = false;
 
      if ((m->type == MUTT_MAILDIR) && c_maildir_trash)
      {
        if (m->emails[j]->deleted)
          m->msg_deleted++;
      }
 
      if (m->emails[j]->tagged)
        m->msg_tagged++;
      if (m->emails[j]->flagged)
        m->msg_flagged++;
      if (!m->emails[j]->read)
      {
        m->msg_unread++;
        if (!m->emails[j]->old)
          m->msg_new++;
      }
 
      j++;
    }
    else
    {
      if ((m->type == MUTT_NOTMUCH) || (m->type == MUTT_MH) ||
          (m->type == MUTT_MAILDIR) || (m->type == MUTT_IMAP))
      {
        mailbox_size_sub(m, m->emails[i]);
      }
      /* remove message from the hash tables */
      if (m->subj_hash && m->emails[i]->env->real_subj)
        mutt_hash_delete(m->subj_hash, m->emails[i]->env->real_subj, m->emails[i]);
      if (m->id_hash && m->emails[i]->env->message_id)
        mutt_hash_delete(m->id_hash, m->emails[i]->env->message_id, m->emails[i]);
      mutt_label_hash_remove(m, m->emails[i]);
 
      if (m->type == MUTT_IMAP)
        imap_notify_delete_email(m, m->emails[i]);
 
      mailbox_gc_add(m->emails[i]);
      m->emails[i] = NULL;
    }
  }
  m->msg_count = j;
}

int mview_mailbox_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_MAILBOX)
    return 0;
  if (!nc->global_data)
    return -1;
 
  struct MailboxView *mv = nc->global_data;
 
  switch (nc->event_subtype)
  {
    case NT_MAILBOX_DELETE:
      mutt_clear_threads(mv->threads);
      mview_clean(mv);
      break;
    case NT_MAILBOX_INVALID:
      mview_update(mv);
      break;
    case NT_MAILBOX_UPDATE:
      update_tables(mv);
      break;
    case NT_MAILBOX_RESORT:
      mutt_sort_headers(mv, true);
      break;
    default:
      return 0;
  }
 
  mutt_debug(LL_DEBUG5, "mailbox done\n");
  return 0;
}

bool message_is_tagged(struct Email *e)
{
  return e->visible && e->tagged;
}

int ea_add_tagged(struct EmailArray *ea, struct MailboxView *mv, struct Email *e, bool use_tagged)
{
  if (use_tagged)
  {
    if (!mv || !mv->mailbox || !mv->mailbox->emails)
      return -1;
 
    struct Mailbox *m = mv->mailbox;
    for (int i = 0; i < m->msg_count; i++)
    {
      e = m->emails[i];
      if (!e)
        break;
      if (!message_is_tagged(e))
        continue;
 
      ARRAY_ADD(ea, e);
    }
  }
  else
  {
    if (!e)
      return -1;
 
    ARRAY_ADD(ea, e);
  }
 
  return ARRAY_SIZE(ea);
}

struct Email *mutt_get_virt_email(struct Mailbox *m, int vnum)
{
  if (!m || !m->emails || !m->v2r)
    return NULL;
 
  if ((vnum < 0) || (vnum >= m->vcount))
    return NULL;
 
  int inum = m->v2r[vnum];
  if ((inum < 0) || (inum >= m->msg_count))
    return NULL;
 
  return m->emails[inum];
}

bool mview_has_limit(const struct MailboxView *mv)
{
  return mv && mv->pattern;
}

struct Mailbox *mview_mailbox(struct MailboxView *mv)
{
  return mv ? mv->mailbox : NULL;
}

static struct MuttThread *top_of_thread(struct Email *e)
{
  if (!e)
    return NULL;
 
  struct MuttThread *t = e->thread;
 
  while (t && t->parent)
    t = t->parent;
 
  return t;
}

bool mutt_limit_current_thread(struct MailboxView *mv, struct Email *e)
{
  if (!mv || !mv->mailbox || !e)
    return false;
 
  struct Mailbox *m = mv->mailbox;
 
  struct MuttThread *me = top_of_thread(e);
  if (!me)
    return false;
 
  m->vcount = 0;
  mv->vsize = 0;
  mv->collapsed = false;
 
  for (int i = 0; i < m->msg_count; i++)
  {
    e = m->emails[i];
    if (!e)
      break;
 
    e->vnum = -1;
    e->visible = false;
    e->collapsed = false;
    e->num_hidden = 0;
 
    if (top_of_thread(e) == me)
    {
      struct Body *body = e->body;
 
      e->vnum = m->vcount;
      e->visible = true;
      m->v2r[m->vcount] = i;
      m->vcount++;
      mv->vsize += (body->length + body->offset - body->hdr_offset);
    }
  }
  return true;
}