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

/*
 *  Copyright (C) 2002 Marco Pesenti Gritti
 *
 *  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "ephy-bookmarks.h"
#include "ephy-file-helpers.h"
#include "ephy-shell.h"
#include "ephy-history.h"
#include "ephy-debug.h"

#include <string.h>
#include <libgnome/gnome-i18n.h>

#define EPHY_BOOKMARKS_XML_VERSION "0.1"

#define MAX_FAVORITES_NUM 10

struct EphyBookmarksPrivate
{
    char *xml_file;
    EphyNode *bookmarks;
    EphyNode *keywords;
    EphyNode *favorites;
    EphyNode *lower_fav;
    double lower_score;
    GHashTable *keywords_hash;
    GStaticRWLock *keywords_hash_lock;
};

static void
ephy_bookmarks_class_init (EphyBookmarksClass *klass);
static void
ephy_bookmarks_init (EphyBookmarks *tab);
static void
ephy_bookmarks_finalize (GObject *object);
static void
ephy_bookmarks_autocompletion_source_init (EphyAutocompletionSourceIface *iface);

static GObjectClass *parent_class = NULL;

GType
ephy_bookmarks_get_type (void)
{
        static GType ephy_bookmarks_type = 0;

        if (ephy_bookmarks_type == 0)
        {
                static const GTypeInfo our_info =
                {
                        sizeof (EphyBookmarksClass),
                        NULL, /* base_init */
                        NULL, /* base_finalize */
                        (GClassInitFunc) ephy_bookmarks_class_init,
                        NULL,
                        NULL, /* class_data */
                        sizeof (EphyBookmarks),
                        0, /* n_preallocs */
                        (GInstanceInitFunc) ephy_bookmarks_init
                };

        static const GInterfaceInfo autocompletion_source_info =
        {
            (GInterfaceInitFunc) ephy_bookmarks_autocompletion_source_init,
            NULL,
            NULL
        };

                ephy_bookmarks_type = g_type_register_static (G_TYPE_OBJECT,
                                  "EphyBookmarks",
                                  &our_info, 0);

        g_type_add_interface_static (ephy_bookmarks_type,
                         EPHY_TYPE_AUTOCOMPLETION_SOURCE,
                         &autocompletion_source_info);
        }

        return ephy_bookmarks_type;
}

static void
ephy_bookmarks_autocompletion_source_set_basic_key (EphyAutocompletionSource *source,
                            const gchar *basic_key)
{
    /* nothing to do here */
}

static void
ephy_bookmarks_autocompletion_source_foreach (EphyAutocompletionSource *source,
                          const gchar *current_text,
                          EphyAutocompletionSourceForeachFunc func,
                          gpointer data)
{
    GPtrArray *children;
    int i;
    EphyBookmarks *eb = EPHY_BOOKMARKS (source);

    children = ephy_node_get_children (eb->priv->bookmarks);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;
        const char *url, *smart_url, *title, *keywords;

        kid = g_ptr_array_index (children, i);
        url = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_LOCATION);
        smart_url = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_SMART_LOCATION);
        title = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_TITLE);
        keywords = ephy_node_get_property_string
            (kid, EPHY_NODE_BMK_PROP_KEYWORDS);

        if (smart_url == NULL ||
            g_utf8_strlen (smart_url, -1) == 0)
        {
            smart_url = NULL;
        }

        func (source,
              smart_url ? NULL : keywords,
              title,
              smart_url ? smart_url : url,
              (smart_url != NULL),
              TRUE, 0, data);
    }
    ephy_node_thaw (eb->priv->bookmarks);
}

static void
ephy_bookmarks_emit_data_changed (EphyBookmarks *eb)
{
    g_signal_emit_by_name (eb, "data-changed");
}

static void
ephy_bookmarks_autocompletion_source_init (EphyAutocompletionSourceIface *iface)
{
    iface->foreach = ephy_bookmarks_autocompletion_source_foreach;
    iface->set_basic_key = ephy_bookmarks_autocompletion_source_set_basic_key;
}

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

        parent_class = g_type_class_peek_parent (klass);

        object_class->finalize = ephy_bookmarks_finalize;
}

static void
ephy_bookmarks_load (EphyBookmarks *eb)
{
    xmlDocPtr doc;
    xmlNodePtr root, child;
    char *tmp;

    if (g_file_test (eb->priv->xml_file, G_FILE_TEST_EXISTS) == FALSE)
        return;

    doc = xmlParseFile (eb->priv->xml_file);
    g_assert (doc != NULL);

    root = xmlDocGetRootElement (doc);

    tmp = xmlGetProp (root, "version");
    g_assert (tmp != NULL && strcmp (tmp, EPHY_BOOKMARKS_XML_VERSION) == 0);
    g_free (tmp);

    for (child = root->children; child != NULL; child = child->next)
    {
        EphyNode *node;

        node = ephy_node_new_from_xml (child);
    }

    xmlFreeDoc (doc);
}

static void
ephy_bookmarks_save (EphyBookmarks *eb)
{
    xmlDocPtr doc;
    xmlNodePtr root;
    GPtrArray *children;
    int i;

    LOG ("Saving bookmarks")

    /* save nodes to xml */
    xmlIndentTreeOutput = TRUE;
    doc = xmlNewDoc ("1.0");

    root = xmlNewDocNode (doc, NULL, "ephy_bookmarks", NULL);
    xmlSetProp (root, "version", EPHY_BOOKMARKS_XML_VERSION);
    xmlDocSetRootElement (doc, root);

    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->bookmarks)
        {
            ephy_node_save_to_xml (kid, root);
        }
    }
    ephy_node_thaw (eb->priv->keywords);

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

        kid = g_ptr_array_index (children, i);

        ephy_node_save_to_xml (kid, root);
    }
    ephy_node_thaw (eb->priv->bookmarks);

    xmlSaveFormatFile (eb->priv->xml_file, doc, 1);
}

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;
    EphyEmbedShell *embed_shell;
    EphyHistory *history;
    EphyNode *result = NULL;

    embed_shell = EPHY_EMBED_SHELL (ephy_shell);
    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;
        }
    }
    ephy_node_thaw (favorites);

    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 *eb, EphyNode *node, EphyHistory *eh)
{
    const char *url;
    gboolean full_menu;
    double score;

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

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

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

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

    return TRUE;
}

static void
update_favorites_menus ()
{
    Session *session;
    const GList *l;

    session = ephy_shell_get_session (ephy_shell);
    l = session_get_windows (session);

    for (; l != NULL; l = l->next)
    {
        EphyWindow *window = EPHY_WINDOW (l->data);

        ephy_window_update_control (window, FavoritesControl);
    }
}

static void
history_site_visited_cb (EphyHistory *gh, const char *url, EphyBookmarks *eb)
{
    EphyNode *node;
    guint id;

    id = ephy_bookmarks_get_bookmark_id (eb, url);
    if (id == 0) return;

    node = ephy_node_get_from_id (id);

    if (add_to_favorites (eb, node, gh))
    {
        update_favorites_menus ();
    }
}

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

    embed_shell = EPHY_EMBED_SHELL (ephy_shell);
    history = ephy_embed_shell_get_global_history (embed_shell);

    g_signal_connect (history, "visited",
              G_CALLBACK (history_site_visited_cb), eb);
}

static void
keywords_added_cb (EphyNode *node,
               EphyNode *child,
               EphyBookmarks *eb)
{
    g_static_rw_lock_writer_lock (eb->priv->keywords_hash_lock);

    g_hash_table_insert (eb->priv->keywords_hash,
                 (char *) ephy_node_get_property_string (child, EPHY_NODE_KEYWORD_PROP_NAME),
                 child);

    g_static_rw_lock_writer_unlock (eb->priv->keywords_hash_lock);
}

static void
keywords_removed_cb (EphyNode *node,
             EphyNode *child,
             EphyBookmarks *eb)
{
    g_static_rw_lock_writer_lock (eb->priv->keywords_hash_lock);

    g_hash_table_remove (eb->priv->keywords_hash,
                 ephy_node_get_property_string (child, EPHY_NODE_KEYWORD_PROP_NAME));

    g_static_rw_lock_writer_unlock (eb->priv->keywords_hash_lock);
}

static void
bookmarks_changed_cb (EphyNode *node,
              EphyNode *child,
              EphyBookmarks *eb)
{
    ephy_bookmarks_emit_data_changed (eb);
}

static void
bookmarks_removed_cb (EphyNode *node,
              EphyNode *child,
              EphyBookmarks *eb)
{
    ephy_bookmarks_emit_data_changed (eb);
}

static void
ephy_bookmarks_init (EphyBookmarks *eb)
{
    GValue value = { 0, };

        eb->priv = g_new0 (EphyBookmarksPrivate, 1);

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

    eb->priv->keywords_hash = g_hash_table_new (g_str_hash,
                                        g_str_equal);
    eb->priv->keywords_hash_lock = g_new0 (GStaticRWLock, 1);
    g_static_rw_lock_init (eb->priv->keywords_hash_lock);

    /* Bookmarks */
    eb->priv->bookmarks = ephy_node_new_with_id (BOOKMARKS_NODE_ID);
    ephy_node_ref (eb->priv->bookmarks);
    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, _("All"));
    ephy_node_set_property (eb->priv->bookmarks,
                    EPHY_NODE_KEYWORD_PROP_NAME,
                    &value);
    g_value_unset (&value);
    g_signal_connect_object (G_OBJECT (eb->priv->bookmarks),
                 "child_removed",
                 G_CALLBACK (bookmarks_removed_cb),
                 G_OBJECT (eb),
                 0);
    g_signal_connect_object (G_OBJECT (eb->priv->bookmarks),
                 "child_changed",
                 G_CALLBACK (bookmarks_changed_cb),
                 G_OBJECT (eb),
                 0);

    /* Keywords */
    eb->priv->keywords = ephy_node_new_with_id (KEYWORDS_NODE_ID);
    ephy_node_ref (eb->priv->keywords);
    g_value_init (&value, G_TYPE_BOOLEAN);
    g_value_set_boolean (&value, TRUE);
    ephy_node_set_property (eb->priv->bookmarks,
            EPHY_NODE_KEYWORD_PROP_ALL_PRIORITY,
            &value);
    g_value_unset (&value);

    ephy_node_add_child (eb->priv->keywords,
                 eb->priv->bookmarks);
    g_signal_connect_object (G_OBJECT (eb->priv->keywords),
                 "child_added",
                 G_CALLBACK (keywords_added_cb),
                 G_OBJECT (eb),
                 0);
    g_signal_connect_object (G_OBJECT (eb->priv->keywords),
                 "child_removed",
                 G_CALLBACK (keywords_removed_cb),
                 G_OBJECT (eb),
                 0);

    eb->priv->favorites = ephy_node_new_with_id (FAVORITES_NODE_ID);
    ephy_node_ref (eb->priv->favorites);

    ephy_bookmarks_load (eb);
    ephy_bookmarks_emit_data_changed (eb);

    ephy_setup_history_notifiers (eb);
    ephy_bookmarks_update_favorites (eb);
}

static void
ephy_bookmarks_finalize (GObject *object)
{
        EphyBookmarks *eb;

    g_return_if_fail (IS_EPHY_BOOKMARKS (object));

    eb = EPHY_BOOKMARKS (object);

        g_return_if_fail (eb->priv != NULL);

    ephy_bookmarks_save (eb);

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

    g_hash_table_destroy (eb->priv->keywords_hash);
    g_static_rw_lock_free (eb->priv->keywords_hash_lock);

        g_free (eb->priv);

    LOG ("Bookmarks finalized")

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

EphyBookmarks *
ephy_bookmarks_new ()
{
    EphyBookmarks *tab;

    tab = EPHY_BOOKMARKS (g_object_new (EPHY_BOOKMARKS_TYPE, NULL));

    return tab;
}

EphyNode *
ephy_bookmarks_add (EphyBookmarks *eb,
            const char *title,
            const char *url,
            const char *smart_url)
{
    EphyNode *bm;
    GValue value = { 0, };

    bm = ephy_node_new ();

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, title);
    ephy_node_set_property (bm, EPHY_NODE_BMK_PROP_TITLE,
                    &value);
    g_value_unset (&value);

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, url);
    ephy_node_set_property (bm, EPHY_NODE_BMK_PROP_LOCATION,
                    &value);
    g_value_unset (&value);

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, smart_url);
    ephy_node_set_property (bm, EPHY_NODE_BMK_PROP_SMART_LOCATION,
                    &value);
    g_value_unset (&value);

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

    ephy_bookmarks_emit_data_changed (eb);
    ephy_bookmarks_save (eb);

    return bm;
}

guint
ephy_bookmarks_get_bookmark_id (EphyBookmarks *eb,
                const char *url)
{
    GPtrArray *children;
    int i;

    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 (strcmp (url, location) == 0)
        {
            ephy_node_thaw (eb->priv->bookmarks);
            return ephy_node_get_id (kid);
        }
    }
    ephy_node_thaw (eb->priv->bookmarks);

    return 0;
}

void
ephy_bookmarks_set_icon (EphyBookmarks *eb,
             const char *url,
             const char *icon)
{
    EphyNode *node;
    GValue value = { 0, };
    guint id;

    g_return_if_fail (icon != NULL);

    id = ephy_bookmarks_get_bookmark_id (eb, url);
    if (id == 0) return;

    node = ephy_node_get_from_id (id);

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, icon);
    ephy_node_set_property (node, EPHY_NODE_BMK_PROP_ICON,
                    &value);
    g_value_unset (&value);
}

static gchar *
options_skip_spaces (const gchar *str)
{
    const gchar *ret = str;
    while (*ret && g_ascii_isspace (*ret))
    {
        ++ret;
    }
    return (gchar *) ret;
}

static char *
options_find_value_end (const gchar *value_start)
{
    const gchar *value_end;
    if (*value_start == '"')
    {
        for (value_end = value_start + 1;
             *value_end && (*value_end != '"' || *(value_end - 1) == '\\');
             ++value_end) ;
    }
    else
    {
        for (value_end = value_start;
             *value_end && ! (g_ascii_isspace (*value_end)
                      || *value_end == ','
                      || *value_end == ';');
             ++value_end) ;
    }
    return (gchar *) value_end;
}

static char *
options_find_next_option (const char *current)
{
    const gchar *value_start;
    const gchar *value_end;
    const gchar *ret;
    value_start = strchr (current, '=');
    if (!value_start) return NULL;
    value_start = options_skip_spaces (value_start + 1);
    value_end = options_find_value_end (value_start);
    if (! (*value_end)) return NULL;
    for (ret = value_end + 1;
         *ret && (g_ascii_isspace (*ret)
              || *ret == ','
              || *ret == ';');
         ++ret);
    return (char *) ret;
}

/**
 * Very simple parser for option strings in the
 * form a=b,c=d,e="f g",...
 */
static gchar *
smart_url_options_get (const gchar *options, const gchar *option)
{
    gchar *ret = NULL;
    gsize optionlen = strlen (option);
    const gchar *current = options_skip_spaces (options);

    while (current)
    {
        if (!strncmp (option, current, optionlen))
        {
            if (g_ascii_isspace (*(current + optionlen)) || *(current + optionlen) == '=')
            {
                const gchar *value_start;
                const gchar *value_end;
                value_start = strchr (current + optionlen, '=');
                if (!value_start) continue;
                value_start = options_skip_spaces (value_start + 1);
                value_end = options_find_value_end (value_start);
                if (*value_start == '"') value_start++;
                if (value_end >= value_start)
                {
                    ret = g_strndup (value_start, value_end - value_start);
                    break;
                }
            }
        }
        current = options_find_next_option (current);
    }

    return ret;
}

static char *
get_smarturl_only (const char *smarturl)
{
    const gchar *openbrace;
    const gchar *closebrace;
    const gchar *c;

    openbrace = strchr (smarturl, '{');
    if (!openbrace) return g_strdup (smarturl);
    for (c = smarturl; c < openbrace; ++c)
    {
        if (!strchr (" \t\n", *c)) return g_strdup (smarturl);
    }

    closebrace = strchr (openbrace + 1, '}');
    if (!closebrace) return g_strdup (smarturl);

    return g_strdup (closebrace + 1);
}

char *
ephy_bookmarks_solve_smart_url (EphyBookmarks *eb,
                const char *smart_url,
                const char *content)
{
    gchar *ret;
    GString *s;
    gchar *t1;
    gchar *t2;
    gchar *encoding;
    gchar *smarturl_only;
    gchar *arg;

    g_return_val_if_fail (content != NULL, NULL);

    smarturl_only = get_smarturl_only (smart_url);

    s = g_string_new ("");

    encoding = smart_url_options_get (smart_url, "encoding");
    if (!encoding)
    {
        encoding = g_strdup ("UTF-8");
    }

    arg = g_convert (content, strlen (content),
             encoding, "UTF-8", NULL, NULL, NULL);

    t1 = smarturl_only;
    t2 = strstr (t1, "%s");
    g_return_val_if_fail (t2 != NULL, NULL);
    g_string_append_len (s, t1, t2 - t1);
    g_string_append (s, arg);
    t1 = t2 + 2;
    g_string_append (s, t1);
    ret = g_string_free (s, FALSE);

    g_free (arg);
    g_free (encoding);
    g_free (smarturl_only);

    return ret;
}

EphyNode *
ephy_bookmarks_add_keyword (EphyBookmarks *eb,
                const char *name)
{
    EphyNode *key;
    GValue value = { 0, };

    key = ephy_node_new ();

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, name);
    ephy_node_set_property (key, EPHY_NODE_KEYWORD_PROP_NAME,
                    &value);
    g_value_unset (&value);

    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);
}

EphyNode *
ephy_bookmarks_find_keyword (EphyBookmarks *eb,
                 const char *name,
                 gboolean partial_match)
{
    EphyNode *node;

    g_return_val_if_fail (name != NULL, NULL);

    if (!partial_match)
    {
        g_static_rw_lock_reader_lock (eb->priv->keywords_hash_lock);
        node = g_hash_table_lookup (eb->priv->keywords_hash, name);
        g_static_rw_lock_reader_unlock (eb->priv->keywords_hash_lock);
    }
    else
    {
        GPtrArray *children;
        int i;

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

        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 (g_str_has_prefix (key, name) > 0)
             {
                 node = kid;
             }
        }
        ephy_node_thaw (eb->priv->keywords);
    }

    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);
}

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);
}

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;
}