path: root/src/bookmarks/ephy-bookmarks.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright © 2002-2004 Marco Pesenti Gritti
 *  Copyright © 2003, 2004 Christian Persch
 *
 *  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, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"

#include "ephy-bookmarks.h"
#include "ephy-bookmarks-type-builtins.h"
#include "ephy-file-helpers.h"
#include "ephy-embed-shell.h"
#include "ephy-shell.h"
#include "ephy-history.h"
#include "ephy-debug.h"
#include "ephy-tree-model-node.h"
#include "ephy-node-common.h"
#include "ephy-bookmarks-export.h"
#include "ephy-bookmarks-import.h"
#include "ephy-bookmark-properties.h"
#include "ephy-prefs.h"
#include "ephy-marshal.h"
#include "ephy-signal-accumulator.h"
#include "ephy-stock-icons.h"
#include "ephy-glib-compat.h"

#include "eel-gconf-extensions.h"

#include <string.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>

#ifdef ENABLE_ZEROCONF
#include <avahi-common/error.h>
#include <avahi-gobject/ga-service-browser.h>
#include <avahi-gobject/ga-service-resolver.h>
#include <avahi-gobject/ga-client.h>
#include <avahi-gobject/ga-enums.h>
#endif /* ENABLE_ZEROCONF */

#define EPHY_BOOKMARKS_XML_ROOT    "ephy_bookmarks"
#define EPHY_BOOKMARKS_XML_VERSION "1.03"
#define BOOKMARKS_SAVE_DELAY 3 /* seconds */
#define MAX_FAVORITES_NUM 10
#define UPDATE_URI_DATA_KEY "updated-uri"

#define EPHY_BOOKMARKS_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_BOOKMARKS, EphyBookmarksPrivate))

static const char zeroconf_protos[3][6] =
{
    "http",
    "https",
    "ftp"
};

struct _EphyBookmarksPrivate
{
    gboolean init_defaults;
    gboolean dirty;
    guint save_timeout_id;
    char *xml_file;
    char *rdf_file;
    EphyNodeDb *db;
    EphyNode *bookmarks;
    EphyNode *keywords;
    EphyNode *favorites;
    EphyNode *notcategorized;
    EphyNode *smartbookmarks;
    EphyNode *lower_fav;
    double lower_score;
    guint disable_bookmark_editing_notifier_id;

#ifdef ENABLE_ZEROCONF
    /* Local sites */
    EphyNode *local;
    GaClient *ga_client;
    GaServiceBrowser *browse_handles[G_N_ELEMENTS (zeroconf_protos)];
    GHashTable *resolve_handles;
#endif
};

typedef struct
{
    const char *title;
    const char *location;
} EphyBookmarksBookmarkInfo;

static const EphyBookmarksBookmarkInfo default_bookmarks [] =
{
    /* Translators you should change these links to respect your locale.
     * For instance in .nl these should be
     * "http://www.google.nl" and "http://www.google.nl/search?q=%s"
     */
    { N_("Search the web"), N_("http://www.google.com/search?q=%s&ie=UTF-8&oe=UTF-8") }
};

static const char *default_topics [] =
{
    N_("Entertainment"),
    N_("News"),
    N_("Shopping"),
    N_("Sports"),
    N_("Travel"),
    N_("Work")
};

/* Signals */
enum
{
    TREE_CHANGED,
    RESOLVE_ADDRESS,
    LAST_SIGNAL
};

static guint ephy_bookmarks_signals[LAST_SIGNAL];

static void ephy_bookmarks_class_init   (EphyBookmarksClass *klass);
static void ephy_bookmarks_init     (EphyBookmarks *tab);
static void ephy_bookmarks_finalize (GObject *object);
static char *impl_resolve_address   (EphyBookmarks*, const char*, const char*);
#ifdef ENABLE_ZEROCONF
static void ephy_local_bookmarks_start_client (EphyBookmarks *bookmarks);
#endif

G_DEFINE_TYPE_WITH_CODE (EphyBookmarks, ephy_bookmarks, G_TYPE_OBJECT,
             volatile GType flags_type; /* work around gcc's optimiser */
             /* make sure the flags type is known */
                 flags_type = EPHY_TYPE_BOOKMARK_PROPERTY;)

static void
ephy_bookmarks_init_defaults (EphyBookmarks *eb)
{
    int i;

    for (i = 0; i < G_N_ELEMENTS (default_topics); i++)
    {
        ephy_bookmarks_add_keyword (eb, _(default_topics[i]));
    }

    for (i = 0; i < G_N_ELEMENTS (default_bookmarks); i++)
    {
        EphyNode *bmk;

        bmk = ephy_bookmarks_add (eb, _(default_bookmarks[i].title),
                      _(default_bookmarks[i].location));
    }
}

static void
ephy_bookmarks_class_init (EphyBookmarksClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = ephy_bookmarks_finalize;

    klass->resolve_address = impl_resolve_address;

    ephy_bookmarks_signals[TREE_CHANGED] =
        g_signal_new ("tree-changed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EphyBookmarksClass, tree_changed),
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE,
                  0);

    ephy_bookmarks_signals[RESOLVE_ADDRESS] =
        g_signal_new ("resolve-address",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EphyBookmarksClass, resolve_address),
                  ephy_signal_accumulator_string, NULL,
                  ephy_marshal_STRING__STRING_STRING,
                  G_TYPE_STRING,
                  2,
                  G_TYPE_STRING,
                  G_TYPE_STRING);

    g_type_class_add_private (object_class, sizeof(EphyBookmarksPrivate));
}

static gboolean
save_filter (EphyNode *node,
         EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;

    return node != priv->bookmarks &&
           node != priv->favorites &&
           node != priv->notcategorized &&
#ifdef ENABLE_ZEROCONF
           node != priv->local;
#else
           TRUE;
#endif
}

#ifdef ENABLE_ZEROCONF
static gboolean
save_filter_local (EphyNode *node,
           EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;

    return !ephy_node_has_child (priv->local, node);
}
#endif

static void
ephy_bookmarks_save (EphyBookmarks *eb)
{

    LOG ("Saving bookmarks");

    ephy_node_db_write_to_xml_safe
        (eb->priv->db,
         (xmlChar *) eb->priv->xml_file,
         (xmlChar *) EPHY_BOOKMARKS_XML_ROOT,
         (xmlChar *) EPHY_BOOKMARKS_XML_VERSION,
         (xmlChar *) "Do not rely on this file, it's only for internal use. Use bookmarks.rdf instead.",
         eb->priv->keywords, (EphyNodeFilterFunc) save_filter, eb,
#ifdef ENABLE_ZEROCONF
         eb->priv->bookmarks, (EphyNodeFilterFunc) save_filter_local, eb,
#else
         eb->priv->bookmarks, NULL, eb,
#endif
         NULL);

    /* Export bookmarks in rdf */
    ephy_bookmarks_export_rdf (eb, eb->priv->rdf_file);
}

static gboolean
save_bookmarks_delayed (EphyBookmarks *bookmarks)
{
    ephy_bookmarks_save (bookmarks);
    bookmarks->priv->dirty = FALSE;
    bookmarks->priv->save_timeout_id = 0;

    return FALSE;
}

static void
ephy_bookmarks_save_delayed (EphyBookmarks *bookmarks, int delay)
{
    if (!bookmarks->priv->dirty)
    {
        bookmarks->priv->dirty = TRUE;

        if (delay > 0)
        {
            bookmarks->priv->save_timeout_id =
                g_timeout_add_seconds (BOOKMARKS_SAVE_DELAY,
                           (GSourceFunc) save_bookmarks_delayed,
                           bookmarks);
        }
        else
        {
            bookmarks->priv->save_timeout_id =
                g_idle_add ((GSourceFunc) save_bookmarks_delayed,
                        bookmarks);
        }
    }
}

static double
get_history_item_score (EphyHistory *eh, const char *page)
{
    return ephy_history_get_page_visits (eh, page);
}

static EphyNode *
compute_lower_fav (EphyNode *favorites, double *score)
{
    GPtrArray *children;
    int i;
    EphyHistory *history;
    EphyNode *result = NULL;

    history = EPHY_HISTORY (ephy_embed_shell_get_global_history (embed_shell));

    *score = DBL_MAX;
    children = ephy_node_get_children (favorites);
    for (i = 0; i < children->len; i++)
    {
        const char *url;
        EphyNode *child;
        double item_score;

        child = g_ptr_array_index (children, i);
        url = ephy_node_get_property_string
            (child, EPHY_NODE_BMK_PROP_LOCATION);
        item_score = get_history_item_score (history, url);
        if (*score > item_score)
        {
            *score = item_score;
            result = child;
        }
    }

    if (result == NULL) *score = 0;

    return result;
}

static void
ephy_bookmarks_update_favorites (EphyBookmarks *eb)
{
    eb->priv->lower_fav = compute_lower_fav (eb->priv->favorites,
                         &eb->priv->lower_score);
}

static gboolean
add_to_favorites (EphyBookmarks *bookmarks,
          EphyNode *node,
          EphyHistory *history)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;
    const char *url;
    gboolean full_menu;
    double score;

    if (ephy_node_db_is_immutable (priv->db)) return FALSE;
    if (ephy_node_has_child (priv->favorites, node)) return FALSE;

    url = ephy_node_get_property_string (node, EPHY_NODE_BMK_PROP_LOCATION);
    score = get_history_item_score (history, url);
    full_menu = ephy_node_get_n_children (priv->favorites)
            >= MAX_FAVORITES_NUM;
    if (full_menu && score < priv->lower_score) return FALSE;

    if (priv->lower_fav && full_menu)
    {
        ephy_node_remove_child (priv->favorites,
                    priv->lower_fav);
    }

    ephy_node_add_child (priv->favorites, node);
    ephy_bookmarks_update_favorites (bookmarks);

    return TRUE;
}

static void
history_site_visited_cb (EphyHistory *history,
             const char *url,
             EphyBookmarks *bookmarks)
{
    EphyNode *node;

    node = ephy_bookmarks_find_bookmark (bookmarks, url);
    if (node == NULL) return;

    add_to_favorites (bookmarks, node, history);
}

static void
clear_favorites (EphyBookmarks *bookmarks)
{
    EphyNode *node;
    GPtrArray *children;
    int i;
    gboolean was_immutable;

    /* clear the favourites */

    was_immutable = ephy_node_db_is_immutable (bookmarks->priv->db);
    ephy_node_db_set_immutable (bookmarks->priv->db, FALSE);

    node = bookmarks->priv->favorites;
    children = ephy_node_get_children (node);
    for (i = (int) children->len - 1; i >= 0; i--)
    {
        EphyNode *kid;

        kid = g_ptr_array_index (children, i);

        ephy_node_remove_child (node, kid);
    }

    ephy_node_db_set_immutable (bookmarks->priv->db, was_immutable);

    ephy_bookmarks_update_favorites (bookmarks);
}

static void
history_cleared_cb (EphyHistory *history,
            EphyBookmarks *bookmarks)
{
    clear_favorites (bookmarks);
}

static void
update_bookmark_response_cb (GtkWidget *dialog,
                 int response,
                 EphyNode *bookmark)
{
    GValue value = { 0, };
    char *to_uri;

    if (response == GTK_RESPONSE_ACCEPT)
    {
        to_uri = (char *) g_object_steal_data (G_OBJECT (dialog),
                               UPDATE_URI_DATA_KEY);
        
        g_value_init (&value, G_TYPE_STRING);
        g_value_take_string (&value, to_uri);
        ephy_node_set_property (bookmark, EPHY_NODE_BMK_PROP_LOCATION,
                    &value);
        g_value_unset (&value);
    }

    gtk_widget_destroy (dialog);
}

static void
update_bookmark_destroy_cb (EphyNode *zombie,
                GtkWidget *dialog)
{
    gtk_widget_destroy (dialog);
}

static void
redirect_cb (EphyHistory *history,
          const char *from_uri,
          const char *to_uri,
          EphyBookmarks *eb)
{
    EphyNode *bookmark;
    GtkWidget *dialog;
    const char *title;

    bookmark = ephy_bookmarks_find_bookmark (eb, from_uri);

    /* FIXME check if there's another update-bookmark dialog up
     * for from_uri' -> from_uri and update it accordingly
     */
    if (bookmark == NULL) return;

    title = ephy_node_get_property_string (bookmark, EPHY_NODE_BMK_PROP_TITLE);

    dialog = gtk_message_dialog_new
            (NULL, GTK_DIALOG_DESTROY_WITH_PARENT,
                GTK_MESSAGE_QUESTION,
                GTK_BUTTONS_NONE,
                /* translators: the %s is the title of the bookmark */
                _("Update bookmark “%s”?"),
                title);
    gtk_message_dialog_format_secondary_text
        (GTK_MESSAGE_DIALOG (dialog),
        /* translators: the %s is a URL */
        _("The bookmarked page has moved to “%s”."),
        to_uri);

    gtk_dialog_add_button (GTK_DIALOG (dialog),
                _("_Don't Update"), GTK_RESPONSE_REJECT);
    gtk_dialog_add_button (GTK_DIALOG (dialog),
                _("_Update"), GTK_RESPONSE_ACCEPT);
    gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_REJECT);

    gtk_window_set_title (GTK_WINDOW (dialog), _("Update Bookmark?"));
    gtk_window_set_icon_name (GTK_WINDOW (dialog), EPHY_STOCK_EPHY);

    g_object_set_data_full (G_OBJECT (dialog), UPDATE_URI_DATA_KEY,
                g_strdup (to_uri), (GDestroyNotify) g_free);
    g_signal_connect (dialog, "response",
              G_CALLBACK (update_bookmark_response_cb), bookmark);
    ephy_node_signal_connect_object (bookmark,
                     EPHY_NODE_DESTROY,
                     (EphyNodeCallback) update_bookmark_destroy_cb,
                     G_OBJECT (dialog));

    /* this dialogue is unexpected */
    gtk_window_set_focus_on_map (GTK_WINDOW (dialog), FALSE);

    gtk_window_present (GTK_WINDOW (dialog));
}

static void
icon_updated_cb (EphyHistory *history,
         const char *address,
         const char *icon,
         EphyBookmarks *eb)
{
    ephy_bookmarks_set_icon (eb, address, icon);
}

static void
ephy_setup_history_notifiers (EphyBookmarks *eb)
{
    EphyHistory *history;

    history = EPHY_HISTORY (ephy_embed_shell_get_global_history (embed_shell));

    if (ephy_history_is_enabled (history) == FALSE)
    {
        clear_favorites (eb);
    }

    g_signal_connect (history, "visited",
              G_CALLBACK (history_site_visited_cb), eb);
    g_signal_connect (history, "cleared",
              G_CALLBACK (history_cleared_cb), eb);
    g_signal_connect (history, "redirect",
              G_CALLBACK (redirect_cb), eb);
    g_signal_connect (history, "icon-updated",
              G_CALLBACK (icon_updated_cb), eb);
}

static void
update_bookmark_keywords (EphyBookmarks *eb, EphyNode *bookmark)
{
    GPtrArray *children;
    int i;
    GString *list;
    const char *title;
    char *normalized_keywords, *case_normalized_keywords;

    list = g_string_new (NULL);

    children = ephy_node_get_children (eb->priv->keywords);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;

        kid = g_ptr_array_index (children, i);

        if (kid != eb->priv->notcategorized && 
            kid != eb->priv->favorites &&
            kid != eb->priv->bookmarks &&
#ifdef ENABLE_ZEROCONF
            kid != eb->priv->local &&
#endif
            ephy_node_has_child (kid, bookmark))
        {
            const char *topic;
            topic = ephy_node_get_property_string
                (kid, EPHY_NODE_KEYWORD_PROP_NAME);
            g_string_append (list, topic);
            g_string_append (list, " ");
        }
    }

    title = ephy_node_get_property_string
        (bookmark, EPHY_NODE_BMK_PROP_TITLE);
    g_string_append (list, " ");
    g_string_append (list, title);

    normalized_keywords = g_utf8_normalize (list->str, -1, G_NORMALIZE_ALL);
    case_normalized_keywords = g_utf8_casefold (normalized_keywords, -1);

    ephy_node_set_property_string (bookmark, EPHY_NODE_BMK_PROP_KEYWORDS,
                       case_normalized_keywords);

    g_string_free (list, TRUE);
    g_free (normalized_keywords);
    g_free (case_normalized_keywords);
}

static void
bookmarks_changed_cb (EphyNode *node,
              EphyNode *child,
              guint property_id,
              EphyBookmarks *eb)
{
    if (property_id == EPHY_NODE_BMK_PROP_TITLE)
    {
        update_bookmark_keywords (eb, child);
    }

    ephy_bookmarks_save_delayed (eb, BOOKMARKS_SAVE_DELAY);
}

static void
bookmarks_removed_cb (EphyNode *node,
              EphyNode *child,
              guint old_index,
              EphyBookmarks *eb)
{
    ephy_bookmarks_save_delayed (eb, BOOKMARKS_SAVE_DELAY);
}

static gboolean
bookmark_is_categorized (EphyBookmarks *eb, EphyNode *bookmark)
{
    GPtrArray *children;
    int i;

    children = ephy_node_get_children (eb->priv->keywords);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;

        kid = g_ptr_array_index (children, i);

        if (kid != eb->priv->notcategorized && 
            kid != eb->priv->favorites &&
            kid != eb->priv->bookmarks &&
#ifdef ENABLE_ZEROCONF
            kid != eb->priv->local &&
#endif
            ephy_node_has_child (kid, bookmark))
        {
            return TRUE;
        }
    }

    return FALSE;
}

static void
topics_removed_cb (EphyNode *node,
           EphyNode *child,
           guint old_index,
           EphyBookmarks *eb)
{
    GPtrArray *children;
    int i;

    children = ephy_node_get_children (child);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;

        kid = g_ptr_array_index (children, i);

        if (!bookmark_is_categorized (eb, kid) &&
            !ephy_node_has_child (eb->priv->notcategorized, kid))
        {
            ephy_node_add_child
                (eb->priv->notcategorized, kid);
        }

        update_bookmark_keywords (eb, kid);
    }
}

static void
update_bookmark_editing (EphyBookmarks *eb)
{
    g_object_set (G_OBJECT (eb->priv->db),
              "immutable", eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_BOOKMARK_EDITING),
              NULL);
}

static void
fix_hierarchy_topic (EphyBookmarks *eb,
             EphyNode *topic)
{
    GPtrArray *children;
    EphyNode *bookmark;
    const char *name;
    char **split;
    int i, j;

    children = ephy_node_get_children (topic);
    name = ephy_node_get_property_string (topic, EPHY_NODE_KEYWORD_PROP_NAME);
    split = g_strsplit (name, "->", -1);
    
    for (i = 0; split[i]; i++)
    {
        if (split[i][0] == '\0') continue;
        
        topic = ephy_bookmarks_find_keyword (eb, split[i], FALSE);
        if (topic == NULL)
        {
            topic = ephy_bookmarks_add_keyword (eb, split[i]);
        }
        for (j = 0; j < children->len; j++)
        {
            bookmark = g_ptr_array_index (children, j);
            ephy_bookmarks_set_keyword (eb, topic, bookmark);
        }
    }
    
    g_strfreev (split);
}

static void
fix_hierarchy (EphyBookmarks *eb)
{
    GPtrArray *topics;
    EphyNode *topic;
    const char *name;
    int i;
    
    topics = ephy_node_get_children (eb->priv->keywords);
    for (i = (int)topics->len - 1; i >= 0; i--)
    {
        topic = (EphyNode *)g_ptr_array_index (topics, i);
        name = ephy_node_get_property_string
            (topic, EPHY_NODE_KEYWORD_PROP_NAME);
        if (strstr (name, "->") != NULL)
        {
            fix_hierarchy_topic (eb, topic);
            ephy_node_remove_child (eb->priv->keywords, topic);
        }
    }
}

static void
disable_bookmark_editing_notifier (GConfClient *client,
                   guint cnxn_id,
                   GConfEntry *entry,
                   EphyBookmarks *eb)
{
    update_bookmark_editing (eb);
}

static void
backup_file (const char *original_filename, const char *extension)
{
    char *template, *backup_filename;
    int result = 0;

    if (g_file_test (original_filename, G_FILE_TEST_EXISTS) == FALSE)
    {
        return;
    }

    template = g_strconcat (original_filename, ".backup-XXXXXX", NULL);
    backup_filename = ephy_file_tmp_filename (template, extension);

    if (backup_filename != NULL)
    {
        result = rename (original_filename, backup_filename);
    }

    if (result >= 0)
    {
        g_message ("Your old bookmarks file was backed up as \"%s\".\n",
               backup_filename);
    }
    else
    {
        g_warning ("Backup failed! Your old bookmarks file was lost.\n");
    }

    g_free (template);
    g_free (backup_filename);
}

#ifdef ENABLE_ZEROCONF

/* C&P adapted from gnome-vfs-dns-sd.c */
static GHashTable *
decode_txt_record (AvahiStringList *input_text)
{
    GHashTable *hash;
    int i;
    int len;
    char *key, *value, *end;
    char *key_dup, *value_dup;
    char *raw_txt;
    size_t raw_txt_len;

    if (!input_text)
        return NULL;

    raw_txt_len = avahi_string_list_serialize (input_text, NULL, 0);
    raw_txt = g_malloc (raw_txt_len);
    raw_txt_len = avahi_string_list_serialize (input_text, raw_txt, raw_txt_len);

    if (raw_txt == NULL)
        return NULL;
    
    hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);

    i = 0;
    while (i < raw_txt_len) {
        len = raw_txt[i++];
        
        if (i + len > raw_txt_len) {
            break;
        }
        
        if (len == 0) {
            continue;
        }
        
        key = &raw_txt[i];
        end = &raw_txt[i + len];
        i += len;

        if (*key == '=') {
            /* 6.4 - silently ignore keys starting with = */
            continue;
        }
        
        value = memchr (key, '=', len);
        if (value) {
            key_dup = g_strndup (key, value - key);
            value++; /* Skip '=' */
            value_dup = g_strndup (value, end - value);
        } else {
            key_dup = g_strndup (key, len);
            value_dup = NULL;
        }
        if (!g_hash_table_lookup_extended (hash,
                           key_dup,
                           NULL, NULL)) {
            g_hash_table_insert (hash,
                         key_dup,
                         value_dup);
        } else {
            g_free (key_dup);
            g_free (value_dup);
        }
    }

    return hash;
}

/* End of copied code */

static char *
get_id_for_response (const char *type,
             const char *domain,
             const char *name)
{
    /* FIXME: limit length! */
    return g_strdup_printf ("%s\1%s\1%s",
                type,
                domain,
                name);
}

typedef struct
{
    EphyBookmarks *bookmarks;
    GaServiceResolver *resolver;
    EphyNode *node;
    char *name;
    char *type;
    char *domain;
} ResolveData;

static void
resolver_found_cb (GaServiceResolver *resolver,
           int interface,
           GaProtocol protocol,
           const char *name,
           const char *type,
           const char *domain,
           const char *host_name,
           const AvahiAddress *address,
           guint16 port,
           AvahiStringList *txt,
           glong flags,
           ResolveData *data)
{
    EphyBookmarks *bookmarks = data->bookmarks;
    EphyBookmarksPrivate *priv = bookmarks->priv;
    GValue value = { 0, };
    const char *path = NULL;
    char host[128];
    GHashTable *text_table;
    char *url;
    gboolean was_immutable;
    gboolean is_new_node = FALSE;
    guint i;

    LOG ("resolver_found_cb resolver %p\n", resolver);

    was_immutable = ephy_node_db_is_immutable (priv->db);
    ephy_node_db_set_immutable (priv->db, FALSE);

    /* Find the protocol */
    for (i = 0; i < G_N_ELEMENTS (zeroconf_protos); ++i)
    {
        char proto[20];

        g_snprintf (proto, sizeof (proto), "_%s._tcp", zeroconf_protos[i]);
        if (strcmp (type, proto) == 0) break;
    }
    if (i == G_N_ELEMENTS (zeroconf_protos)) return;
    
    if (address == NULL)
    {
        g_warning ("Zeroconf failed to resolve host %s", name);
        return;
    }

    text_table = decode_txt_record (txt);

    if (text_table != NULL)
    {
        path = g_hash_table_lookup (text_table, "path");
    }
    if (path == NULL || path[0] == '\0')
    {
        path = "/";
    }
    
    avahi_address_snprint (host, sizeof (host), address);

    LOG ("0conf RESOLVED type=%s domain=%s name=%s => proto=%s host=%s port=%d path=%s\n",
         type, domain, name,
         zeroconf_protos[i], host, port, path);

    was_immutable = ephy_node_db_is_immutable (priv->db);
    ephy_node_db_set_immutable (priv->db, FALSE);

    if (data->node == NULL)
    {
        is_new_node = TRUE;

        data->node = ephy_node_new (priv->db);
        g_assert (data->node != NULL);

        /* don't allow dragging this node */
        ephy_node_set_is_drag_source (data->node, FALSE);

        g_value_init (&value, G_TYPE_STRING);
        g_value_take_string (&value,
                     get_id_for_response (data->type, 
                              data->domain,
                              data->name));
        ephy_node_set_property (data->node, EPHY_NODE_BMK_PROP_SERVICE_ID, &value);
        g_value_unset (&value);

        /* FIXME: limit length! */
        ephy_node_set_property_string (data->node,
                           EPHY_NODE_BMK_PROP_TITLE,
                           name);

        ephy_node_set_property_boolean (data->node,
                        EPHY_NODE_BMK_PROP_IMMUTABLE,
                        TRUE);
    }

    /* FIXME: limit length! */
    url = g_strdup_printf ("%s://%s:%d%s", zeroconf_protos[i], host, port, path);

    g_value_init (&value, G_TYPE_STRING);
    g_value_take_string (&value, url);
    ephy_node_set_property (data->node, EPHY_NODE_BMK_PROP_LOCATION, &value);
    g_value_unset (&value);

    if (is_new_node)
    {
        ephy_node_add_child (priv->bookmarks, data->node);
        ephy_node_add_child (priv->local, data->node);
    }
    
    ephy_node_db_set_immutable (priv->db, was_immutable);

    if (text_table != NULL)
    {
        g_hash_table_unref (text_table);
    }
}

static void
resolver_failure_cb (GaServiceResolver *resolver,
             GError *error,
             ResolveData *data)
{
    LOG ("resolver_failure_cb resolver %p: %s\n", resolver, error?error->message:"(null)");

    /* Remove the node, if present */
    if (data->node != NULL)
    {   
        EphyBookmarks *bookmarks = data->bookmarks;
        EphyBookmarksPrivate *priv = bookmarks->priv;
        gboolean was_immutable;

        was_immutable = ephy_node_db_is_immutable (priv->db);
        ephy_node_db_set_immutable (priv->db, FALSE);   
        ephy_node_unref (data->node);
        data->node = NULL;
        ephy_node_db_set_immutable (priv->db, was_immutable);
    }
}

static void
resolve_data_free (ResolveData* data)
{
    if (data->resolver)
        g_object_unref (data->resolver);

    g_free (data->type);
    g_free (data->name);
    g_free (data->domain);
    g_slice_free (ResolveData, data);
}

static void
browser_new_service_cb (GaServiceBrowser *browser,
            int interface,
            GaProtocol protocol,
            const char *name,
            const char *type,
            const char *domain,
            glong flags,
            EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;
    ResolveData *data;
    char *node_id;
    GError *error = NULL;
    
    node_id = get_id_for_response (type, domain, name);
    
    LOG ("0conf ADD: type=%s domain=%s name=%s\n",
         type, domain, name);
    
    if (g_hash_table_lookup (priv->resolve_handles, node_id) != NULL)
    {
        g_free (node_id);
        return;
    }

    data = g_slice_new0 (ResolveData);
    data->bookmarks = bookmarks;
    data->node = NULL;
    data->type = g_strdup (type);
    data->name = g_strdup (name);
    data->domain = g_strdup (domain);
    
    data->resolver = ga_service_resolver_new (AVAHI_IF_UNSPEC,
                          AVAHI_PROTO_UNSPEC,
                          name, type, domain,
                          AVAHI_PROTO_UNSPEC,
                          GA_LOOKUP_USE_MULTICAST);
    g_signal_connect (data->resolver, "found",
              G_CALLBACK (resolver_found_cb), data);
    g_signal_connect (data->resolver, "failure",
              G_CALLBACK (resolver_failure_cb), data);
    if (!ga_service_resolver_attach (data->resolver,
                     priv->ga_client,
                     &error))
    {
        g_warning ("Unable to resolve Zeroconf service %s: %s", name, error ? error->message : "(null)");
        g_clear_error (&error);
        resolve_data_free (data);
        g_free (node_id);
        return;
    }

    g_hash_table_insert (priv->resolve_handles,
                 node_id /* transfer ownership */, data);
}

static void
browser_removed_service_cb (GaServiceBrowser *browser,
                int interface,
                GaProtocol protocol,
                const char *name,
                const char *type,
                const char *domain,
                glong flags,
                EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;
    char *node_id;
    ResolveData *data;

    node_id = get_id_for_response (type, domain, name);
    data = g_hash_table_lookup (priv->resolve_handles, node_id);
    /* shouldn't really happen, but let's play safe */
    if (!data)
    {
        g_free (node_id);
        return;
    }

    if (data->node != NULL)
    {   
        gboolean was_immutable;

        was_immutable = ephy_node_db_is_immutable (priv->db);
        ephy_node_db_set_immutable (priv->db, FALSE);   
        ephy_node_unref (data->node);
        data->node = NULL;
        ephy_node_db_set_immutable (priv->db, was_immutable);
    }

    g_hash_table_remove (priv->resolve_handles, node_id);
    g_free (node_id);
}

static void
start_browsing (GaClient *ga_client,
        EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;
    guint i;

    for (i = 0; i < G_N_ELEMENTS (zeroconf_protos); ++i)
    {
        GaServiceBrowser *browser = NULL;
        char proto[20];

        g_snprintf (proto, sizeof (proto), "_%s._tcp", zeroconf_protos[i]);

        browser = ga_service_browser_new (proto);
        g_signal_connect (browser, "new-service",
                  G_CALLBACK (browser_new_service_cb), bookmarks);
        g_signal_connect (browser, "removed-service",
                  G_CALLBACK (browser_removed_service_cb), bookmarks);
        if (!ga_service_browser_attach (browser,
                        ga_client,
                        NULL))
        {
            g_warning ("Unable to start Zeroconf subsystem");
            g_object_unref (browser);
            return;
        }

        priv->browse_handles[i] = browser;
    }
}

static void
ga_client_state_changed_cb (GaClient *ga_client,
                GaClientState state,
                EphyBookmarks *bookmarks)
{
    if (state == GA_CLIENT_STATE_FAILURE)
    {
        if (avahi_client_errno (ga_client->avahi_client) == AVAHI_ERR_DISCONNECTED)
        {
                        EphyBookmarksPrivate *priv = bookmarks->priv;

                        g_object_unref (priv->ga_client);
                        priv->ga_client = NULL;

                        ephy_local_bookmarks_start_client (bookmarks);
        }
    }
    if (state == GA_CLIENT_STATE_S_RUNNING)
    {
        start_browsing (ga_client, bookmarks);
    }
}

static void
ephy_local_bookmarks_start_client (EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;
    GaClient *ga_client;

    ga_client = ga_client_new (GA_CLIENT_FLAG_NO_FAIL);
    g_signal_connect (ga_client, "state-changed",
              G_CALLBACK (ga_client_state_changed_cb),
              bookmarks);
    if (!ga_client_start (ga_client, NULL))
    {
        g_warning ("Unable to start Zeroconf subsystem");
                g_object_unref (ga_client);
        return;
    }
    priv->ga_client = ga_client;
}

static void
ephy_local_bookmarks_init (EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;
    priv->resolve_handles = g_hash_table_new_full (g_str_hash, g_str_equal,
                               g_free,
                               (GDestroyNotify) resolve_data_free);
        ephy_local_bookmarks_start_client (bookmarks);
}

static void
ephy_local_bookmarks_stop (EphyBookmarks *bookmarks)
{
    EphyBookmarksPrivate *priv = bookmarks->priv;
    guint i;

    for (i = 0; i < G_N_ELEMENTS (zeroconf_protos); ++i)
    {
        if (priv->browse_handles[i] != NULL)
        {
            g_object_unref (priv->browse_handles[i]);
            priv->browse_handles[i] = NULL;
        }
    }

    if (priv->resolve_handles != NULL)
    {
        g_hash_table_destroy (priv->resolve_handles);
        priv->resolve_handles = NULL;
    }

    if (priv->local != NULL)
    {
        ephy_node_unref (priv->local);
        priv->local = NULL;
    }
    
    if (priv->ga_client != NULL)
    {
        g_object_unref (priv->ga_client);
        priv->ga_client = NULL;
    }
}

#endif /* ENABLE_ZEROCONF */

static void
ephy_bookmarks_init (EphyBookmarks *eb)
{
    EphyNodeDb *db;

    /* Translators: this topic contains all bookmarks */
    const char *bk_all = C_("bookmarks", "All");

    /* Translators: this topic contains the most used bookmarks */
    const char *bk_most_visited = C_("bookmarks", "Most Visited");

    /* Translators: this topic contains the not categorized
       bookmarks */
    const char *bk_not_categorized = C_("bookmarks", "Not Categorized");
    
#ifdef ENABLE_ZEROCONF
    /* Translators: this is an automatic topic containing local
     * websites bookmarks autodiscovered with zeroconf. */
    const char *bk_local_sites = C_("bookmarks", "Nearby Sites");
#endif

    eb->priv = EPHY_BOOKMARKS_GET_PRIVATE (eb);

    db = ephy_node_db_new (EPHY_NODE_DB_BOOKMARKS);
    eb->priv->db = db;

    eb->priv->xml_file = g_build_filename (ephy_dot_dir (),
                           "ephy-bookmarks.xml",
                           NULL);
    eb->priv->rdf_file = g_build_filename (ephy_dot_dir (),
                           "bookmarks.rdf",
                           NULL);

    /* Bookmarks */
    eb->priv->bookmarks = ephy_node_new_with_id (db, BOOKMARKS_NODE_ID);
    
    ephy_node_set_property_string (eb->priv->bookmarks,
                       EPHY_NODE_KEYWORD_PROP_NAME,
                       bk_all);
    ephy_node_signal_connect_object (eb->priv->bookmarks,
                     EPHY_NODE_CHILD_REMOVED,
                     (EphyNodeCallback) bookmarks_removed_cb,
                     G_OBJECT (eb));
    ephy_node_signal_connect_object (eb->priv->bookmarks,
                     EPHY_NODE_CHILD_CHANGED,
                     (EphyNodeCallback) bookmarks_changed_cb,
                     G_OBJECT (eb));

    /* Keywords */
    eb->priv->keywords = ephy_node_new_with_id (db, KEYWORDS_NODE_ID);
    ephy_node_set_property_int (eb->priv->bookmarks,
                    EPHY_NODE_KEYWORD_PROP_PRIORITY,
                    EPHY_NODE_ALL_PRIORITY);
    
    ephy_node_signal_connect_object (eb->priv->keywords,
                     EPHY_NODE_CHILD_REMOVED,
                     (EphyNodeCallback) topics_removed_cb,
                     G_OBJECT (eb));

    ephy_node_add_child (eb->priv->keywords,
                 eb->priv->bookmarks);

    /* Favorites */
    eb->priv->favorites = ephy_node_new_with_id (db, FAVORITES_NODE_ID);
    
    
    ephy_node_set_property_string (eb->priv->favorites,
                       EPHY_NODE_KEYWORD_PROP_NAME,
                       bk_most_visited);
    
    ephy_node_set_property_int (eb->priv->favorites,
                    EPHY_NODE_KEYWORD_PROP_PRIORITY,
                    EPHY_NODE_SPECIAL_PRIORITY);
    ephy_node_add_child (eb->priv->keywords, eb->priv->favorites);

    /* Not categorized */
    eb->priv->notcategorized = ephy_node_new_with_id (db, BMKS_NOTCATEGORIZED_NODE_ID);
    
    
    ephy_node_set_property_string (eb->priv->notcategorized,
                       EPHY_NODE_KEYWORD_PROP_NAME,
                       bk_not_categorized);

    ephy_node_set_property_int (eb->priv->notcategorized,
                    EPHY_NODE_KEYWORD_PROP_PRIORITY,
                    EPHY_NODE_SPECIAL_PRIORITY);
    
    ephy_node_add_child (eb->priv->keywords, eb->priv->notcategorized);

#ifdef ENABLE_ZEROCONF
    /* Local Websites */
    eb->priv->local = ephy_node_new_with_id (db, BMKS_LOCAL_NODE_ID);

    /* don't allow drags to this topic */
    ephy_node_set_is_drag_dest (eb->priv->local, FALSE);

    
    ephy_node_set_property_string (eb->priv->local,
                       EPHY_NODE_KEYWORD_PROP_NAME,
                       bk_local_sites);
    ephy_node_set_property_int (eb->priv->local,
                    EPHY_NODE_KEYWORD_PROP_PRIORITY,
                    EPHY_NODE_SPECIAL_PRIORITY);
    
    ephy_node_add_child (eb->priv->keywords, eb->priv->local);
    ephy_local_bookmarks_init (eb);
#endif /* ENABLE_ZEROCONF */

    /* Smart bookmarks */
    eb->priv->smartbookmarks = ephy_node_new_with_id (db, SMARTBOOKMARKS_NODE_ID);

    if (g_file_test (eb->priv->xml_file, G_FILE_TEST_EXISTS) == FALSE
        && g_file_test (eb->priv->rdf_file, G_FILE_TEST_EXISTS) == FALSE)
    {
        eb->priv->init_defaults = TRUE;
    }
    else if (ephy_node_db_load_from_file (eb->priv->db, eb->priv->xml_file,
                          (xmlChar *) EPHY_BOOKMARKS_XML_ROOT,
                          (xmlChar *) EPHY_BOOKMARKS_XML_VERSION) == FALSE)
    {
        /* save the corrupted files so the user can late try to
         * manually recover them. See bug #128308.
         */

        g_warning ("Could not read bookmarks file \"%s\", trying to "
               "re-import bookmarks from \"%s\"\n",
               eb->priv->xml_file, eb->priv->rdf_file);

        backup_file (eb->priv->xml_file, "xml");

        if (ephy_bookmarks_import_rdf (eb, eb->priv->rdf_file) == FALSE)
        {
            backup_file (eb->priv->rdf_file, "rdf");

            eb->priv->init_defaults = TRUE;
        }
    }
    
    if (eb->priv->init_defaults)
    {
        ephy_bookmarks_init_defaults (eb);
    }
    
    fix_hierarchy (eb);

    eb->priv->disable_bookmark_editing_notifier_id = eel_gconf_notification_add
        (CONF_LOCKDOWN_DISABLE_BOOKMARK_EDITING,
         (GConfClientNotifyFunc)disable_bookmark_editing_notifier, eb);
    update_bookmark_editing (eb);

    ephy_setup_history_notifiers (eb);
    ephy_bookmarks_update_favorites (eb);
}

static void
ephy_bookmarks_finalize (GObject *object)
{
    EphyBookmarks *eb = EPHY_BOOKMARKS (object);
    EphyBookmarksPrivate *priv = eb->priv;

    eel_gconf_notification_remove (priv->disable_bookmark_editing_notifier_id);

    if (priv->save_timeout_id != 0)
    {
        g_source_remove (priv->save_timeout_id);
    }

    ephy_bookmarks_save (eb);

#ifdef ENABLE_ZEROCONF
    ephy_local_bookmarks_stop (eb);
#endif

    ephy_node_unref (priv->bookmarks);
    ephy_node_unref (priv->keywords);
    ephy_node_unref (priv->favorites);
    ephy_node_unref (priv->notcategorized);

    g_object_unref (priv->db);

    g_free (priv->xml_file);
    g_free (priv->rdf_file);

    LOG ("Bookmarks finalized");

    G_OBJECT_CLASS (ephy_bookmarks_parent_class)->finalize (object);
}

EphyBookmarks *
ephy_bookmarks_new (void)
{
    return EPHY_BOOKMARKS (g_object_new (EPHY_TYPE_BOOKMARKS, NULL));
}

static void
update_has_smart_address (EphyBookmarks *bookmarks, EphyNode *bmk, const char *address)
{
    EphyNode *smart_bmks;
    gboolean smart = FALSE, with_options = FALSE;

    smart_bmks = bookmarks->priv->smartbookmarks;

    if (address)
    {
        smart = strstr (address, "%s") != NULL;
        with_options = strstr (address, "%s%{") != NULL;
    }

    /* if we have a smart bookmark with width specification,
     * remove from smart bookmarks first to force an update
     * in the toolbar
     */
    if (smart && with_options)
    {
        if (ephy_node_has_child (smart_bmks, bmk))
        {
            ephy_node_remove_child (smart_bmks, bmk);
        }
        ephy_node_add_child (smart_bmks, bmk);
    }
    else if (smart)
    {
        if (!ephy_node_has_child (smart_bmks, bmk))
        {
            ephy_node_add_child (smart_bmks, bmk);
        }
    }
    else
    {
        if (ephy_node_has_child (smart_bmks, bmk))
        {
            ephy_node_remove_child (smart_bmks, bmk);
        }
    }
}

EphyNode *
ephy_bookmarks_add (EphyBookmarks *eb,
            const char *title,
            const char *url)
{
    EphyHistory *history;
    EphyNode *bm;

    bm = ephy_node_new (eb->priv->db);

    if (bm == NULL) return NULL;
    
    if (url == NULL) return NULL;
    ephy_node_set_property_string (bm, EPHY_NODE_BMK_PROP_LOCATION, url);
    
    if (title == NULL || title[0] == '\0')
    {
        title = _("Untitled");
    }
    ephy_node_set_property_string (bm, EPHY_NODE_BMK_PROP_TITLE, title);

    history = EPHY_HISTORY (ephy_embed_shell_get_global_history (embed_shell));
    if (history != NULL)
    {
        const char *icon = ephy_history_get_icon (history, url);
        if (icon != NULL)
        {
            ephy_node_set_property_string
                (bm, EPHY_NODE_BMK_PROP_ICON, icon);
        }
    }

    update_has_smart_address (eb, bm, url);
    update_bookmark_keywords (eb, bm);

    ephy_node_add_child (eb->priv->bookmarks, bm);
    ephy_node_add_child (eb->priv->notcategorized, bm);

    ephy_bookmarks_save_delayed (eb, 0);

    return bm;
}

void
ephy_bookmarks_set_address (EphyBookmarks *eb,
                EphyNode *bookmark,
                const char *address)
{
    ephy_node_set_property_string (bookmark, EPHY_NODE_BMK_PROP_LOCATION,
                       address);

    update_has_smart_address (eb, bookmark, address);
}

EphyNode *
ephy_bookmarks_find_bookmark (EphyBookmarks *eb,
                  const char *url)
{
    GPtrArray *children;
    int i;

    g_return_val_if_fail (EPHY_IS_BOOKMARKS (eb), NULL);
    g_return_val_if_fail (eb->priv->bookmarks != NULL, NULL);
    g_return_val_if_fail (url != NULL, NULL);

    children = ephy_node_get_children (eb->priv->bookmarks);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;
        const char *location;

        kid = g_ptr_array_index (children, i);
        location = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_LOCATION);

        if (location != NULL && strcmp (url, location) == 0)
        {
            return kid;
        }
    }

    return NULL;
}

static gboolean
is_similar (const char *url1, const char *url2)
{
    int i, j;
    
    for (i = 0; url1[i]; i++)
      if (url1[i] == '#' || url1[i] == '?')
        break;
    while(i>0 && url1[i] == '/')
      i--;
    
    for (j = 0; url2[j]; j++)
      if (url2[j] == '#' || url2[j] == '?')
        break;
    while(j>0 && url2[j] == '/') 
      j--;
    
    if (i != j) return FALSE;
    if (strncmp (url1, url2, i) != 0) return FALSE;
    return TRUE;
}

gint
ephy_bookmarks_get_similar (EphyBookmarks *eb,
                EphyNode *bookmark,
                GPtrArray *identical,
                GPtrArray *similar)
{
    GPtrArray *children;
    const char *url;
    int i, result;

    g_return_val_if_fail (EPHY_IS_BOOKMARKS (eb), -1);
    g_return_val_if_fail (eb->priv->bookmarks != NULL, -1);
    g_return_val_if_fail (bookmark != NULL, -1);
    
    url = ephy_node_get_property_string 
      (bookmark, EPHY_NODE_BMK_PROP_LOCATION);

    g_return_val_if_fail (url != NULL, -1);
    
    result = 0;
    
    children = ephy_node_get_children (eb->priv->bookmarks);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;
        const char *location;

        kid = g_ptr_array_index (children, i);
        if (kid == bookmark)
        {
            continue;
        }
        
        location = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_LOCATION);

        if (location != NULL)
        {
            if(identical != NULL && strcmp (url, location) == 0)
            {
                g_ptr_array_add (identical, kid);
                result++;
            }
            else if(is_similar (url, location))
            {
                if (similar != NULL)
                {
                    g_ptr_array_add (similar, kid);
                }
                result++;
            }
        }
    }
    
    return result;
}

void
ephy_bookmarks_set_icon (EphyBookmarks *eb,
             const char *url,
             const char *icon)
{
    EphyNode *node;

    g_return_if_fail (icon != NULL);

    node = ephy_bookmarks_find_bookmark (eb, url);
    if (node == NULL) return;

    ephy_node_set_property_string (node, EPHY_NODE_BMK_PROP_ICON, icon);
}


void
ephy_bookmarks_set_usericon (EphyBookmarks *eb,
                 const char *url,
                 const char *icon)
{
    EphyNode *node;

    g_return_if_fail (icon != NULL);

    node = ephy_bookmarks_find_bookmark (eb, url);
    if (node == NULL) return;

    ephy_node_set_property_string (node, EPHY_NODE_BMK_PROP_USERICON,
                       icon);
}


/* name must end with '=' */
static char *
get_option (char *start,
        const char *name,
        char **optionsend)
{
    char *end, *p;

    *optionsend = start;

    if (start == NULL || start[0] != '%' || start[1] != '{') return NULL;
    start += 2;

    end = strstr (start, "}");
    if (end == NULL) return NULL;
    *optionsend = end + 1;

    start = strstr (start, name);
    if (start == NULL || start > end) return NULL;
    start += strlen (name);

    /* Find end of option, either ',' or '}' */
    end = strstr (start, ",");
    if (end == NULL || end >= *optionsend) end = *optionsend - 1;

    /* limit option length and sanity-check it */
    if (end - start > 32) return NULL;
    for (p = start; p < end; ++p)
    {
        if (!g_ascii_isalnum (*p)) return NULL;
    }

    return g_strndup (start, end - start);
}

static char *
impl_resolve_address (EphyBookmarks *eb,
              const char *address,
              const char *content)
{
    GString *result;
    char *pos, *oldpos, *arg, *escaped_arg, *encoding, *optionsend;

    if (address == NULL) return NULL;
    if (content == NULL) content = "";

    result = g_string_new_len (NULL, strlen (content) + strlen (address));

    /* substitute %s's */
    oldpos = (char*) address;
    while ((pos = strstr (oldpos, "%s")) != NULL)
    {
        g_string_append_len (result, oldpos, pos - oldpos);
        pos += 2;

        encoding = get_option (pos, "encoding=", &optionsend);
        if (encoding != NULL)
        {
            GError *error = NULL;

            arg = g_convert (content, strlen (content), encoding,
                     "UTF-8", NULL, NULL, &error);
            if (error != NULL)
            {
                g_warning ("Error when converting arg to encoding '%s': %s\n",
                       encoding, error->message);
                g_error_free (error);
            }
            else
            {
                escaped_arg = g_uri_escape_string (arg, NULL, TRUE);
                g_string_append (result, escaped_arg);
                g_free (escaped_arg);
                g_free (arg);
            }

            g_free (encoding);
        }
        else
        {
            arg = g_uri_escape_string (content, NULL, TRUE);
            g_string_append (result, arg);
            g_free (arg);
        }

        oldpos = optionsend;
    }
    g_string_append (result, oldpos);

    return g_string_free (result, FALSE);
}

char *
ephy_bookmarks_resolve_address (EphyBookmarks *eb,
                const char *address,
                const char *parameter)
{
    char *retval = NULL;

    g_return_val_if_fail (EPHY_IS_BOOKMARKS (eb), NULL);
    g_return_val_if_fail (address != NULL, NULL);

    g_signal_emit (eb, ephy_bookmarks_signals[RESOLVE_ADDRESS], 0,
               address, parameter, &retval);

    return retval;
}

guint
ephy_bookmarks_get_smart_bookmark_width (EphyNode *bookmark)
{
    const char *url;
    char *option, *end, *number;
    guint width;

    url = ephy_node_get_property_string (bookmark, EPHY_NODE_BMK_PROP_LOCATION);
    if (url == NULL) return 0;

    /* this takes the first %s, but that's okay since we only support one text entry box */
    option = strstr (url, "%s%{");
    if (option == NULL) return 0;
    option += 2;

    number = get_option (option, "width=", &end);
    if (number == NULL) return 0;

    width = (guint) g_ascii_strtoull (number, NULL, 10);
    g_free (number);

    return CLAMP (width, 1, 64);
}

EphyNode *
ephy_bookmarks_add_keyword (EphyBookmarks *eb,
                const char *name)
{
    EphyNode *key;

    key = ephy_node_new (eb->priv->db);

    if (key == NULL) return NULL;

    ephy_node_set_property_string (key, EPHY_NODE_KEYWORD_PROP_NAME,
                       name);
    ephy_node_set_property_int (key, EPHY_NODE_KEYWORD_PROP_PRIORITY,
                    EPHY_NODE_NORMAL_PRIORITY);
    
    ephy_node_add_child (eb->priv->keywords, key);

    return key;
}

void
ephy_bookmarks_remove_keyword (EphyBookmarks *eb,
                   EphyNode *keyword)
{
    ephy_node_remove_child (eb->priv->keywords, keyword);
}

char *
ephy_bookmarks_get_topic_uri (EphyBookmarks *eb,
                  EphyNode *node)
{
    char *uri;

    if (ephy_bookmarks_get_bookmarks (eb) == node)
    {
        uri = g_strdup ("topic://Special/All");
    }
    else if (ephy_bookmarks_get_not_categorized (eb) == node)
    {
        uri = g_strdup ("topic://Special/NotCategorized");
    }
    else if (ephy_bookmarks_get_favorites (eb) == node)
    {
        uri = g_strdup ("topic://Special/Favorites");
    }
#ifdef ENABLE_ZEROCONF
    else if (ephy_bookmarks_get_local (eb) == node)
    {
        /* Note: do not change to "Nearby" because of existing custom toolbars */
        uri = g_strdup ("topic://Special/Local");
    }
#endif
    else
    {
        const char *name;

        name = ephy_node_get_property_string
            (node, EPHY_NODE_KEYWORD_PROP_NAME);

        uri = g_strdup_printf ("topic://%s", name);
    }

    return uri;
}

EphyNode *
ephy_bookmarks_find_keyword (EphyBookmarks *eb,
                 const char *name,
                 gboolean partial_match)
{
    EphyNode *node;
    GPtrArray *children;
    int i;
    const char *topic_name;

    g_return_val_if_fail (name != NULL, NULL);

    topic_name = name;

    if (g_utf8_strlen (name, -1) == 0)
    {
        LOG ("Empty name, no keyword matches.");
        return NULL;
    }

    if (strcmp (name, "topic://Special/All") == 0)
    {
        return ephy_bookmarks_get_bookmarks (eb);
    }
    else if (strcmp (name, "topic://Special/NotCategorized") == 0)
    {
        return ephy_bookmarks_get_not_categorized (eb);
    }
    else if (strcmp (name, "topic://Special/Favorites") == 0)
    {
        return ephy_bookmarks_get_favorites (eb);
    }
#ifdef ENABLE_ZEROCONF
    else if (strcmp (name, "topic://Special/Local") == 0)
    {
        return ephy_bookmarks_get_local (eb);
    }
#endif
    else if (g_str_has_prefix (name, "topic://"))
    {
        topic_name += strlen ("topic://");
    }

    children = ephy_node_get_children (eb->priv->keywords);
    node = NULL;
    for (i = 0; i < children->len; i++)
    {
         EphyNode *kid;
         const char *key;

         kid = g_ptr_array_index (children, i);
         key = ephy_node_get_property_string (kid, EPHY_NODE_KEYWORD_PROP_NAME);

         if ((partial_match && g_str_has_prefix (key, topic_name) > 0) ||
             (!partial_match && strcmp (key, topic_name) == 0))
         {
             node = kid;
         }
    }

    return node;
}

gboolean
ephy_bookmarks_has_keyword (EphyBookmarks *eb,
                EphyNode *keyword,
                EphyNode *bookmark)
{
    return ephy_node_has_child (keyword, bookmark);
}

void
ephy_bookmarks_set_keyword (EphyBookmarks *eb,
                EphyNode *keyword,
                EphyNode *bookmark)
{
    if (ephy_node_has_child (keyword, bookmark)) return;

    ephy_node_add_child (keyword, bookmark);

    if (ephy_node_has_child (eb->priv->notcategorized, bookmark))
    {
        LOG ("Remove from categorized bookmarks");
        ephy_node_remove_child
            (eb->priv->notcategorized, bookmark);
    }

    update_bookmark_keywords (eb, bookmark);

    g_signal_emit (G_OBJECT (eb), ephy_bookmarks_signals[TREE_CHANGED], 0);
}

void
ephy_bookmarks_unset_keyword (EphyBookmarks *eb,
                  EphyNode *keyword,
                  EphyNode *bookmark)
{
    if (!ephy_node_has_child (keyword, bookmark)) return;

    ephy_node_remove_child (keyword, bookmark);

    if (!bookmark_is_categorized (eb, bookmark) &&
        !ephy_node_has_child (eb->priv->notcategorized, bookmark))
    {
        LOG ("Add to not categorized bookmarks");
        ephy_node_add_child
            (eb->priv->notcategorized, bookmark);
    }

    update_bookmark_keywords (eb, bookmark);

    g_signal_emit (G_OBJECT (eb), ephy_bookmarks_signals[TREE_CHANGED], 0);
}

EphyNode *
ephy_bookmarks_get_smart_bookmarks (EphyBookmarks *eb)
{
    return eb->priv->smartbookmarks;
}

EphyNode *
ephy_bookmarks_get_keywords (EphyBookmarks *eb)
{
    return eb->priv->keywords;
}

EphyNode *
ephy_bookmarks_get_bookmarks (EphyBookmarks *eb)
{
    return eb->priv->bookmarks;
}

EphyNode *
ephy_bookmarks_get_favorites (EphyBookmarks *eb)
{
    return eb->priv->favorites;
}

EphyNode *
ephy_bookmarks_get_local (EphyBookmarks *eb)
{
#ifdef ENABLE_ZEROCONF
    return eb->priv->local;
#else
    return NULL;
#endif
}

EphyNode *
ephy_bookmarks_get_not_categorized (EphyBookmarks *eb)
{
    return eb->priv->notcategorized;
}

EphyNode *
ephy_bookmarks_get_from_id (EphyBookmarks *eb, long id)
{
    return ephy_node_db_get_node_from_id (eb->priv->db, id);
}

int
ephy_bookmarks_compare_topics (gconstpointer a, gconstpointer b)
{
    EphyNode *node_a = (EphyNode *)a;
    EphyNode *node_b = (EphyNode *)b;
    const char *title1, *title2;
    int priority1, priority2;

    priority1 = ephy_node_get_property_int (node_a, EPHY_NODE_KEYWORD_PROP_PRIORITY);
    priority2 = ephy_node_get_property_int (node_b, EPHY_NODE_KEYWORD_PROP_PRIORITY);
    
    if (priority1 > priority2) return 1;
    if (priority1 < priority2) return -1;

    title1 = ephy_node_get_property_string (node_a, EPHY_NODE_KEYWORD_PROP_NAME);
    title2 = ephy_node_get_property_string (node_b, EPHY_NODE_KEYWORD_PROP_NAME);

    if (title1 == title2) return 0;
    if (title1 == NULL) return -1;
    if (title2 == NULL) return 1;
    return g_utf8_collate (title1, title2);
}

int
ephy_bookmarks_compare_topic_pointers (gconstpointer a, gconstpointer b)
{
    EphyNode *node_a = *(EphyNode **)a;
    EphyNode *node_b = *(EphyNode **)b;
    
    return ephy_bookmarks_compare_topics (node_a, node_b);
}

int
ephy_bookmarks_compare_bookmarks (gconstpointer a, gconstpointer b)
{
    EphyNode *node_a = (EphyNode *)a;
    EphyNode *node_b = (EphyNode *)b;
    const char *title1, *title2;
    
    title1 = ephy_node_get_property_string (node_a, EPHY_NODE_BMK_PROP_TITLE);
    title2 = ephy_node_get_property_string (node_b, EPHY_NODE_BMK_PROP_TITLE);

    if (title1 == title2) return 0;
    if (title1 == NULL) return -1;
    if (title2 == NULL) return 1;
    return g_utf8_collate (title1, title2);
}

int
ephy_bookmarks_compare_bookmark_pointers (gconstpointer a, gconstpointer b)
{
    EphyNode *node_a = *(EphyNode **)a;
    EphyNode *node_b = *(EphyNode **)b;
    
    return ephy_bookmarks_compare_bookmarks (node_a, node_b);
}