selection.c

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#include "config.h"
#include <stdbool.h>
#include <stddef.h>
#include "mutt/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "mview.h"

static bool ea_contains_email(struct EmailArray *ea, struct Email *e)
{
  if (!ea || !e)
    return false;
 
  struct Email **ep = NULL;
  ARRAY_FOREACH(ep, ea)
  {
    if (*ep == e)
      return true;
  }
 
  return false;
}

static void ea_add_email(struct EmailArray *ea, struct Email *e)
{
  if (!ea_contains_email(ea, e))
    ARRAY_ADD(ea, e);
}

static void ea_add_collapsed_thread(struct EmailArray *ea, struct Email *e)
{
  if (!e || !e->collapsed || !e->thread)
    return;
 
  struct MuttThread *top = e->thread;
  while (top->parent)
    top = top->parent;
 
  struct MuttThread *thread = top;
  while (thread)
  {
    struct Email *et = thread->message;
    if (et && et->visible)
      ea_add_email(ea, et);
 
    if (thread->child)
    {
      thread = thread->child;
      continue;
    }
 
    // Leaf node: backtrack to find the next sibling,
    // but stay within the subtree rooted at `top`
    while ((thread != top) && !thread->next)
      thread = thread->parent;
 
    if (thread == top)
      break;
 
    thread = thread->next;
  }
}

static void ea_add_folded(struct EmailArray *ea, struct Email *e)
{
  ea_add_email(ea, e);
  ea_add_collapsed_thread(ea, e);
}

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;
 
      ea_add_folded(ea, e);
    }
  }
  else
  {
    if (!e)
      return -1;
 
    ea_add_folded(ea, e);
  }
 
  return ARRAY_SIZE(ea);
}