#include <stdlib.h>
#include "owl.h"

static const char fileIdent[] = "$Id$";

void owl_view_create(owl_view *v, char *name, owl_filter *f, owl_style *s)
{
  v->name=owl_strdup(name);
  v->filter=f;
  v->style=s;
  owl_messagelist_create(&(v->ml));
  owl_view_recalculate(v);
}


/* if the message matches the filter then add to view */
void owl_view_consider_message(owl_view *v, owl_message *m)
{
  if (owl_filter_message_match(v->filter, m)) {
    owl_messagelist_append_element(&(v->ml), m);
  }
}

/* remove all messages, add all the global messages that match the
 * filter.
 */
void owl_view_recalculate(owl_view *v)
{
  int i, j;
  owl_messagelist *gml;
  owl_messagelist *ml;
  owl_message *m;

  gml=owl_global_get_msglist(&g);
  ml=&(v->ml);

  /* nuke the old list */
  owl_list_free_simple((owl_list *) ml);
  owl_messagelist_create(&(v->ml));

  /* find all the messages we want */
  j=owl_messagelist_get_size(gml);
  for (i=0; i<j; i++) {
    m=owl_messagelist_get_element(gml, i);
    if (owl_filter_message_match(v->filter, m)) {
      owl_messagelist_append_element(ml, m);
    }
  }
}

void owl_view_new_filter(owl_view *v, owl_filter *f)
{
  v->filter=f;
  owl_view_recalculate(v);
}

void owl_view_set_style(owl_view *v, owl_style *s)
{
  v->style=s;
}

owl_message *owl_view_get_element(owl_view *v, int index)
{
  return(owl_messagelist_get_element(&(v->ml), index));
}

void owl_view_delete_element(owl_view *v, int index)
{
  owl_messagelist_delete_element(&(v->ml), index);
}

void owl_view_undelete_element(owl_view *v, int index)
{
  owl_messagelist_undelete_element(&(v->ml), index);
}

int owl_view_get_size(owl_view *v)
{
  return(owl_messagelist_get_size(&(v->ml)));
}

/* Returns the position in the view with a message closest 
 * to the passed msgid. */
int owl_view_get_nearest_to_msgid(owl_view *v, int targetid)
{
  int i, bestdist=-1, bestpos=0, curid, curdist;

  for (i=0; i<owl_view_get_size(v); i++) {
    curid = owl_message_get_id(owl_view_get_element(v, i));
    curdist = abs(targetid-curid);
    if (bestdist<0 || curdist<bestdist) {
      bestdist = curdist;
      bestpos = i;
    }
  }
  return (bestpos);
}

int owl_view_get_nearest_to_saved(owl_view *v)
{
  int cachedid;

  cachedid=owl_filter_get_cachedmsgid(v->filter);
  if (cachedid<0) return(0);
  return (owl_view_get_nearest_to_msgid(v, cachedid));
}

/* saves the current message position in the filter so it can 
 * be restored later if we switch back to this filter. */
void owl_view_save_curmsgid(owl_view *v, int curid)
{
  owl_filter_set_cachedmsgid(v->filter, curid);
}

char *owl_view_get_filtname(owl_view *v)
{
  return(owl_filter_get_name(v->filter));
}

void owl_view_free(owl_view *v)
{
  owl_list_free_simple((owl_list *) &(v->ml));
  if (v->name) owl_free(v->name);
}