/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 
 * e-completion-test.c
 * Copyright 2000, 2001, Ximian, Inc.
 *
 * Authors:
 *   Jon Trowbridge <trow@ximian.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License, version 2, as published by the Free Software Foundation.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <gnome.h>
#include "e-completion.h"
#include "e-entry.h"

#define TIMEOUT 10

/* Dictionary Lookup test */

static gint word_count = 0;
static gchar **word_array = NULL;

static void
read_dict (void)
{
  FILE *in = fopen ("/usr/share/dict/words", "r");
  gchar buffer[128];
  GList *word_list = NULL, *iter;
  gint i;

  while (fgets (buffer, 128, in)) {
    gint len = strlen (buffer);
    if (len > 0 && buffer[len-1] == '\n')
      buffer[len-1] = '\0';
    word_list = g_list_prepend (word_list, g_strdup (buffer));
    ++word_count;
  }
  fclose (in);

  word_array = g_new (gchar *, word_count);
  i = word_count-1;
  for (iter = word_list; iter != NULL; iter = g_list_next (iter)) {
    word_array[i] = (gchar *)iter->data;
    --i;
  }
}

static gint
find_word (const gchar *str)
{
  gint a, b;

  if (word_array == NULL)
    read_dict ();

  a = 0;
  b = word_count-1;

  while (b-a > 1) {
    gint m = (a+b)/2;
    gint cmp = g_strcasecmp (str, word_array[m]);

    if (cmp < 0)
      b = m;
    else if (cmp > 0)
      a = m;
    else
      return m;
  }

  return b;
}

struct {
  ECompletion *complete;
  const gchar *txt;
  gint start;
  gint current;
  gint len;
  gint limit;
  gint count;
} dict_info;
static guint dict_tag = 0;

static gboolean
dict_check (gpointer ptr)
{
  gint limit = dict_info.limit;
  gint i;

  /* If this is the first iteration, do the binary search in our word list to figure out
     where to start.  We do less work on the first iteration, to give more of a sense of
     immediate feedback. */
  if (dict_info.start < 0) {
    dict_info.start = dict_info.current = find_word (dict_info.txt);
  }

  i = dict_info.current;
  while (limit > 0
	 && i < word_count
	 && dict_info.count < 50
	 && g_strncasecmp (dict_info.txt, word_array[i], dict_info.len) == 0) {
    
    ECompletionMatch *match = g_new (ECompletionMatch, 1);
    e_completion_match_construct (match);
    e_completion_match_set_text (match, word_array[i], NULL);
    match->score = dict_info.len / (double)strlen (word_array[i]);
    e_completion_found_match (dict_info.complete, match);

    ++i;
    --limit;
    ++dict_info.count;
  }
  dict_info.current = i;
  dict_info.limit = MIN (dict_info.limit*2, 400);
  
  if (limit != 0) {
    dict_tag = 0;
    e_completion_end_search (dict_info.complete);
    return FALSE;
  }



  return TRUE;
}

static void
request_dict_search (ECompletion *complete, const gchar *txt, gint pos, gint limit, gpointer user_data)
{
  gint len = strlen (txt);

  if (dict_tag != 0) {
    gtk_timeout_remove (dict_tag);
    dict_tag = 0;
  }

  if (len > 0) {
    dict_info.complete = complete;
    dict_info.txt = txt;
    dict_info.start = -1;
    dict_info.current = -1;
    dict_info.len = len;
    dict_info.limit = 100;
    dict_info.count = 0;
    dict_tag = gtk_timeout_add (TIMEOUT, dict_check, NULL);
  } else {
    e_completion_end_search (complete);
  }
}

static void
end_dict_search (ECompletion *complete, gpointer user_data)
{
  if (dict_tag != 0) {
    gtk_timeout_remove (dict_tag);
    dict_tag = 0;
  }
}

static void
popup_cb (EEntry *popup, GdkEventButton *ev, gint pos, gpointer user_data)
{
  g_print ("popup at pos %d\n", pos);
}

int
main (int argc, gchar **argv)
{
  ECompletion* complete;
  GtkWidget *entry;
  GtkWidget *win;

  gnome_init ("ETextModelTest", "0.0", argc, argv);

  read_dict ();

  complete = e_completion_new ();
  gtk_signal_connect (GTK_OBJECT (complete),
		      "request_completion",
		      GTK_SIGNAL_FUNC (request_dict_search),
		      NULL);
  gtk_signal_connect (GTK_OBJECT (complete),
		      "end_completion",
		      GTK_SIGNAL_FUNC (end_dict_search),
		      NULL);
  gtk_signal_connect (GTK_OBJECT (complete),
		      "cancel_completion",
		      GTK_SIGNAL_FUNC (end_dict_search),
		      NULL);

  win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  entry = e_entry_new ();
  e_entry_enable_completion_full (E_ENTRY (entry), complete, 0, NULL);
  e_entry_set_editable (E_ENTRY (entry), TRUE);

  gtk_signal_connect (GTK_OBJECT (entry),
		      "popup",
		      GTK_SIGNAL_FUNC (popup_cb),
		      NULL);

  gtk_container_add (GTK_CONTAINER (win), entry);
  gtk_widget_show_all (win);

  gtk_main ();

  return 0;
}
