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egg-recent-item.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * 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.
 *
 * Authors:
 *   James Willcox <jwillcox@cs.indiana.edu>
 */


#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <libgnomevfs/gnome-vfs.h>
#include <libgnomevfs/gnome-vfs-mime-utils.h>
#include "egg-recent-item.h"



EggRecentItem *
egg_recent_item_new (void)
{
      EggRecentItem *item;

      item = g_new (EggRecentItem, 1);

      item->groups = NULL;
      item->private_data = FALSE;
      item->uri = NULL;
      item->mime_type = NULL;
      item->mime_type_is_explicit = FALSE;

      item->refcount = 1;

      return item;
}

static void
egg_recent_item_free (EggRecentItem *item)
{
      if (item->uri)
            g_free (item->uri);

      if (item->mime_type)
            g_free (item->mime_type);

      if (item->groups) {
            g_list_foreach (item->groups, (GFunc)g_free, NULL);
            g_list_free (item->groups);
            item->groups = NULL;
      }

      g_free (item);
}

EggRecentItem *
egg_recent_item_ref (EggRecentItem *item)
{
      item->refcount++;
      return item;
}

EggRecentItem *
egg_recent_item_unref (EggRecentItem *item)
{
      item->refcount--;

      if (item->refcount == 0) {
            egg_recent_item_free (item);
      }

      return item;
}


EggRecentItem * 
egg_recent_item_new_from_uri (const gchar *uri)
{
      EggRecentItem *item;

      g_return_val_if_fail (uri != NULL, NULL);

      item = egg_recent_item_new ();

      if (!egg_recent_item_set_uri (item ,uri)) {
            egg_recent_item_free (item);
            return NULL;
      }
      
      return item;
}

static void
egg_recent_item_update_mime_type (EggRecentItem *item)
{
      if (!item->mime_type_is_explicit) {
            g_free (item->mime_type);
            item->mime_type = NULL;

            if (item->uri)
                  item->mime_type = gnome_vfs_get_mime_type (item->uri);

            if (!item->mime_type)
                  item->mime_type = g_strdup (GNOME_VFS_MIME_TYPE_UNKNOWN);
      }
}

gboolean
egg_recent_item_set_uri (EggRecentItem *item, const gchar *uri)
{
      gchar *utf8_uri;

      /* if G_BROKEN_FILENAMES is not set, this should succede */
      if (g_utf8_validate (uri, -1, NULL)) {
            item->uri = gnome_vfs_make_uri_from_input (uri);
      } else {
            utf8_uri = g_filename_to_utf8 (uri, -1, NULL, NULL, NULL);

            if (utf8_uri == NULL) {
                  g_warning ("Couldn't convert URI to UTF-8");
                  return FALSE;
            }

            if (g_utf8_validate (utf8_uri, -1, NULL)) {
                  item->uri = gnome_vfs_make_uri_from_input (utf8_uri);
            } else {
                  g_free (utf8_uri);
                  return FALSE;
            }

            g_free (utf8_uri);
      }

      return TRUE;
}

gchar * 
egg_recent_item_get_uri (const EggRecentItem *item)
{
      return g_strdup (item->uri);
}

G_CONST_RETURN gchar * 
egg_recent_item_peek_uri (const EggRecentItem *item)
{
      return item->uri;
}

gchar * 
egg_recent_item_get_uri_utf8 (const EggRecentItem *item)
{
      /* this could fail, but it's not likely, since we've already done it
       * once in set_uri()
       */
      return g_filename_to_utf8 (item->uri, -1, NULL, NULL, NULL);
}

gchar *
egg_recent_item_get_uri_for_display (const EggRecentItem *item)
{
      return gnome_vfs_format_uri_for_display (item->uri);
}

/* Stolen from gnome_vfs_make_valid_utf8() */
static char *
make_valid_utf8 (const char *name)
{
      GString *string;
      const char *remainder, *invalid;
      int remaining_bytes, valid_bytes;

      string = NULL;
      remainder = name;
      remaining_bytes = name ? strlen (name) : 0;

      while (remaining_bytes != 0) {
            if (g_utf8_validate (remainder, remaining_bytes, &invalid))
                  break;

            valid_bytes = invalid - remainder;

            if (string == NULL)
                  string = g_string_sized_new (remaining_bytes);

            g_string_append_len (string, remainder, valid_bytes);
            g_string_append_c (string, '?');

            remaining_bytes -= valid_bytes + 1;
            remainder = invalid + 1;
      }

      if (string == NULL)
            return g_strdup (name);

      g_string_append (string, remainder);
/*    g_string_append (string, _(" (invalid file name)")); */
      g_assert (g_utf8_validate (string->str, -1, NULL));

      return g_string_free (string, FALSE);
}

static gchar *
get_uri_shortname_for_display (GnomeVFSURI *uri)
{
      gchar    *name;   
      gboolean  validated;

      validated = FALSE;
      name = gnome_vfs_uri_extract_short_name (uri);
      
      if (name == NULL)
      {
            name = gnome_vfs_uri_to_string (uri, GNOME_VFS_URI_HIDE_PASSWORD);
      }
      else if (g_ascii_strcasecmp (uri->method_string, "file") == 0)
      {
            gchar *text_uri;
            gchar *local_file;
            text_uri = gnome_vfs_uri_to_string (uri, GNOME_VFS_URI_HIDE_PASSWORD);
            local_file = gnome_vfs_get_local_path_from_uri (text_uri);
            
            if (local_file != NULL)
            {
                  g_free (name);
                  name = g_filename_display_basename (local_file);
                  validated = TRUE;
            }
            
            g_free (local_file);
            g_free (text_uri);
      } 
      else if (!gnome_vfs_uri_has_parent (uri)) 
      {
            const gchar *method;
            
            method = uri->method_string;
            
            if (name == NULL ||
                strcmp (name, GNOME_VFS_URI_PATH_STR) == 0) 
            {
                  g_free (name);
                  name = g_strdup (method);
            } 
            else 
            {
                  gchar *tmp;
                  
                  tmp = name;
                  name = g_strdup_printf ("%s: %s", method, name);
                  g_free (tmp);
            }
      }

      if (!validated && !g_utf8_validate (name, -1, NULL)) 
      {
            gchar *utf8_name;
            
            utf8_name = make_valid_utf8 (name);
            g_free (name);
            name = utf8_name;
      }

      return name;
}

/**
 * egg_recent_item_get_short_name:
 * @item: an #EggRecentItem
 *
 * Computes a valid UTF-8 string that can be used as the name of the item in a
 * menu or list.  For example, calling this function on an item that refers to
 * "file:///foo/bar.txt" will yield "bar.txt".
 *
 * Return value: A newly-allocated string in UTF-8 encoding; free it with
 * g_free().
 **/
gchar *
egg_recent_item_get_short_name (const EggRecentItem *item)
{
      GnomeVFSURI *uri;
      gchar *short_name;

      g_return_val_if_fail (item != NULL, NULL);

      if (item->uri == NULL)
            return NULL;

      uri = gnome_vfs_uri_new (item->uri);
      if (uri == NULL)
            return NULL;

      short_name = get_uri_shortname_for_display (uri);

      gnome_vfs_uri_unref (uri);

      return short_name;
}

void 
egg_recent_item_set_mime_type (EggRecentItem *item, const gchar *mime)
{
      g_free (item->mime_type);
      item->mime_type = NULL;

      if (mime && mime[0]) {
            item->mime_type_is_explicit = TRUE;
            item->mime_type             = g_strdup (mime);
      } else {
            item->mime_type_is_explicit = FALSE;
      }
}

gchar * 
egg_recent_item_get_mime_type (EggRecentItem *item)
{
      egg_recent_item_update_mime_type (item);

      return g_strdup (item->mime_type);
}

void 
egg_recent_item_set_timestamp (EggRecentItem *item, time_t timestamp)
{
      if (timestamp == (time_t) -1)
            time (&timestamp);

      item->timestamp = timestamp;
}

time_t 
egg_recent_item_get_timestamp (const EggRecentItem *item)
{
      return item->timestamp;
}

G_CONST_RETURN GList *
egg_recent_item_get_groups (const EggRecentItem *item)
{
      return item->groups;
}

gboolean
egg_recent_item_in_group (const EggRecentItem *item, const gchar *group_name)
{
      GList *tmp;

      tmp = item->groups;
      while (tmp != NULL) {
            gchar *val = (gchar *)tmp->data;
            
            if (strcmp (group_name, val) == 0)
                  return TRUE;

            tmp = tmp->next;
      }
      
      return FALSE;
}

void
egg_recent_item_add_group (EggRecentItem *item, const gchar *group_name)
{
      g_return_if_fail (group_name != NULL);

      if (!egg_recent_item_in_group (item, group_name))
            item->groups = g_list_append (item->groups, g_strdup (group_name));
}

void
egg_recent_item_remove_group (EggRecentItem *item, const gchar *group_name)
{
      GList *tmp;

      g_return_if_fail (group_name != NULL);

      tmp = item->groups;
      while (tmp != NULL) {
            gchar *val = (gchar *)tmp->data;
            
            if (strcmp (group_name, val) == 0) {
                  item->groups = g_list_remove (item->groups,
                                          val);
                  g_free (val);
                  break;
            }

            tmp = tmp->next;
      }
}

void
egg_recent_item_set_private (EggRecentItem *item, gboolean priv)
{
      item->private_data = priv;
}

gboolean
egg_recent_item_get_private (const EggRecentItem *item)
{
      return item->private_data;
}

GType
egg_recent_item_get_type (void)
{
      static GType boxed_type = 0;
      
      if (!boxed_type) {
            boxed_type = g_boxed_type_register_static ("EggRecentItem",
                              (GBoxedCopyFunc)egg_recent_item_ref,
                              (GBoxedFreeFunc)egg_recent_item_unref);
      }
      
      return boxed_type;
}

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