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/*
 *  Copyright (C) 2003 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "ephy-bookmarks-menu.h"
#include "ephy-bookmark-action.h"
#include "ephy-shell.h"
#include "ephy-node-common.h"
#include "ephy-string.h"
#include "ephy-debug.h"

//#include <libxml/entities.h>
#include <glib/gprintf.h>
#include <glib/gi18n.h>
#include <gtk/gtkuimanager.h>

#define BOOKMARKS_MENU_PATH "/menubar/BookmarksMenu"

/**
 * Private data
 */
 
#define EPHY_BOOKMARKS_MENU_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_BOOKMARKS_MENU, EphyBookmarksMenuPrivate))

struct _EphyBookmarksMenuPrivate
{
    GtkUIManager *merge;
    EphyWindow *window;
    EphyBookmarks *bookmarks;
    GtkActionGroup *action_group;
    guint ui_id;
    guint update_tag;
};

/**
 * Private functions, only availble from this file
 */
static void ephy_bookmarks_menu_class_init    (EphyBookmarksMenuClass *klass);
static void ephy_bookmarks_menu_init      (EphyBookmarksMenu *menu);
static void ephy_bookmarks_menu_finalize      (GObject *o);

enum
{
    PROP_0,
    PROP_EPHY_WINDOW
};

static gpointer parent_class;

GType
ephy_bookmarks_menu_get_type (void)
{
        static GType ephy_bookmarks_menu_type = 0;

        if (ephy_bookmarks_menu_type == 0)
        {
                static const GTypeInfo our_info =
                {
                        sizeof (EphyBookmarksMenuClass),
                        NULL, /* base_init */
                        NULL, /* base_finalize */
                        (GClassInitFunc) ephy_bookmarks_menu_class_init,
                        NULL,
                        NULL, /* class_data */
                        sizeof (EphyBookmarksMenu),
                        0, /* n_preallocs */
                        (GInstanceInitFunc) ephy_bookmarks_menu_init
                };

                ephy_bookmarks_menu_type = g_type_register_static (G_TYPE_OBJECT,
                                       "EphyBookmarksMenu",
                                       &our_info, 0);
        }
        return ephy_bookmarks_menu_type;
}

static void
ephy_bookmarks_menu_clean (EphyBookmarksMenu *menu)
{
    EphyBookmarksMenuPrivate *p = menu->priv;

    if (p->ui_id > 0)
    {
        gtk_ui_manager_remove_ui (p->merge, p->ui_id);
        gtk_ui_manager_ensure_update (p->merge);
        p->ui_id = 0;
    }

    if (p->action_group != NULL)
    {
        gtk_ui_manager_remove_action_group (p->merge, p->action_group);
        g_object_unref (p->action_group);
    }
}

static void
go_location_cb (GtkAction *action, char *location, EphyWindow *window)
{
    ephy_window_load_url (window, location);
}

static int
sort_topics (gconstpointer a, gconstpointer b)
{
    EphyNode *node_a = (EphyNode *)a;
    EphyNode *node_b = (EphyNode *)b;
    const char *title1, *title2;
    int retval;

    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 == NULL)
    {
        retval = -1;
    }
    else if (title2 == NULL)
    {
        retval = 1;
    }
    else
    {
        char *str_a, *str_b;

        str_a = g_utf8_casefold (title1, -1);
        str_b = g_utf8_casefold (title2, -1);
        retval = g_utf8_collate (str_a, str_b);
        g_free (str_a);
        g_free (str_b);
    }

    return retval;
}

static int
sort_bookmarks (gconstpointer a, gconstpointer b)
{
    EphyNode *node_a = (EphyNode *)a;
    EphyNode *node_b = (EphyNode *)b;
    const char *title1, *title2;
    int retval;

    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 == NULL)
    {
        retval = -1;
    }
    else if (title2 == NULL)
    {
        retval = 1;
    }
    else
    {
        char *str_a, *str_b;

        str_a = g_utf8_casefold (title1, -1);
        str_b = g_utf8_casefold (title2, -1);
        retval = g_utf8_collate (str_a, str_b);
        g_free (str_a);
        g_free (str_b);
    }

    return retval;
}

static void
add_bookmarks_menu (EphyBookmarksMenu *menu, EphyNode *node, const char *path)
{
    GPtrArray *children;
    EphyBookmarksMenuPrivate *p = menu->priv;
    GList *node_list = NULL, *l;
    int i;

    children = ephy_node_get_children (node);
    for (i = 0; i < children->len; ++i)
    {
        node_list = g_list_prepend (node_list,
                        g_ptr_array_index (children, i));
    }

    if (node_list != NULL)
    {
        node_list = g_list_sort (node_list, (GCompareFunc)sort_bookmarks);
        for (l = node_list; l != NULL; l = l->next)
        {
            GtkAction *action;
            EphyNode *child;
            long id;
            char verb[30], name[30];

            child = l->data;
            id = ephy_node_get_id (child);
            g_sprintf (verb, "OpenTopic%ld", ephy_node_get_id (child));
            g_sprintf (name, "%sName", verb);

            action = ephy_bookmark_action_new (verb, id);
            gtk_action_group_add_action (p->action_group, action);
            g_object_unref (action);
            g_signal_connect (action, "go_location",
                      G_CALLBACK (go_location_cb), p->window);

            gtk_ui_manager_add_ui (p->merge, p->ui_id, path,
                           name, verb,
                           GTK_UI_MANAGER_MENUITEM, FALSE);
        }
        g_list_free (node_list);
    }
}

static void
ephy_bookmarks_menu_rebuild (EphyBookmarksMenu *menu)
{
    EphyBookmarksMenuPrivate *p = menu->priv;
    gint i;
    EphyNode *topics;
    EphyNode *not_categorized;
    GPtrArray *children;
    GList *node_list = NULL, *l;

    LOG ("Rebuilding bookmarks menu")

    START_PROFILER ("Rebuilding bookmarks menu")

    ephy_bookmarks_menu_clean (menu);

    topics = ephy_bookmarks_get_keywords (p->bookmarks);
    not_categorized = ephy_bookmarks_get_not_categorized (p->bookmarks);
    children = ephy_node_get_children (topics);

    p->ui_id = gtk_ui_manager_new_merge_id (p->merge);

    p->action_group = gtk_action_group_new ("BookmarksActions");
    gtk_ui_manager_insert_action_group (p->merge, p->action_group, 0);

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

        kid = g_ptr_array_index (children, i);

        priority = ephy_node_get_property_int
            (kid, EPHY_NODE_KEYWORD_PROP_PRIORITY);

        if (priority == EPHY_NODE_NORMAL_PRIORITY)
        {
            node_list = g_list_prepend (node_list, kid);
        }
    }

    node_list = g_list_sort (node_list, (GCompareFunc)sort_topics);

    for (l = node_list; l != NULL; l = l->next)
    {
        char verb[30], name[30], path[60];
        const char *tmp;
        char *title;
        EphyNode *child;
        GtkAction *action;

        child = l->data;

        tmp = ephy_node_get_property_string (child, EPHY_NODE_KEYWORD_PROP_NAME);
        title = ephy_string_double_underscores (tmp);
        
        g_sprintf (verb, "OpenTopic%ld", ephy_node_get_id (child));
        g_sprintf (name, "%sName", verb);
        g_sprintf (path, "%s/%s", BOOKMARKS_MENU_PATH, name);

        action = g_object_new (GTK_TYPE_ACTION,
                       "name", verb,
                       "label", title,
                       "hide_if_empty", FALSE,
                       NULL);
        gtk_action_group_add_action (p->action_group, action);
        g_object_unref (action);
        g_free (title);

        gtk_ui_manager_add_ui (p->merge, p->ui_id,
                       BOOKMARKS_MENU_PATH,
                       name, verb,
                       GTK_UI_MANAGER_MENU, FALSE);

        add_bookmarks_menu (menu, child, path);
    }

    if (ephy_node_get_n_children (not_categorized) > 0)
    {
        add_bookmarks_menu (menu, not_categorized, BOOKMARKS_MENU_PATH);
    }

    g_list_free (node_list);

    STOP_PROFILER ("Rebuilding bookmarks menu")
}

static void
ephy_bookmarks_menu_set_window (EphyBookmarksMenu *menu, EphyWindow *window)
{
    menu->priv->window = window;
    menu->priv->merge = GTK_UI_MANAGER (window->ui_merge);
    ephy_bookmarks_menu_rebuild (menu);
}

static void
ephy_bookmarks_menu_set_property (GObject *object,
                  guint prop_id,
                  const GValue *value,
                  GParamSpec *pspec)
{
        EphyBookmarksMenu *m = EPHY_BOOKMARKS_MENU (object);

        switch (prop_id)
        {
                case PROP_EPHY_WINDOW:
                        ephy_bookmarks_menu_set_window
                (m, g_value_get_object (value));
                        break;
        }
}

static void
ephy_bookmarks_menu_get_property (GObject *object,
                                  guint prop_id,
                                  GValue *value,
                                  GParamSpec *pspec)
{
        EphyBookmarksMenu *m = EPHY_BOOKMARKS_MENU (object);

        switch (prop_id)
        {
                case PROP_EPHY_WINDOW:
                        g_value_set_object (value, m->priv->window);
                        break;
        }
}


static void
ephy_bookmarks_menu_class_init (EphyBookmarksMenuClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    object_class->finalize = ephy_bookmarks_menu_finalize;
    object_class->set_property = ephy_bookmarks_menu_set_property;
    object_class->get_property = ephy_bookmarks_menu_get_property;

    g_object_class_install_property (object_class,
                                         PROP_EPHY_WINDOW,
                                         g_param_spec_object ("EphyWindow",
                                                              "EphyWindow",
                                                              "Parent window",
                                                              EPHY_TYPE_WINDOW,
                                                              G_PARAM_READWRITE |
                                  G_PARAM_CONSTRUCT_ONLY));

    g_type_class_add_private (object_class, sizeof(EphyBookmarksMenuPrivate));
}

static gboolean
do_updates (EphyBookmarksMenu *menu)
{
    ephy_bookmarks_menu_rebuild (menu);

    menu->priv->update_tag = 0;

    return FALSE;
}

static void
bookmarks_tree_changed_cb (EphyBookmarks *bookmarks, EphyBookmarksMenu *menu)
{
    if (menu->priv->update_tag == 0)
    {
        menu->priv->update_tag = g_idle_add((GSourceFunc)do_updates, menu);
    }
}

static void
ephy_bookmarks_menu_init (EphyBookmarksMenu *menu)
{
    EphyBookmarksMenuPrivate *p = EPHY_BOOKMARKS_MENU_GET_PRIVATE (menu);

    menu->priv = p;

    menu->priv->bookmarks = ephy_shell_get_bookmarks (ephy_shell);
    g_signal_connect_object (menu->priv->bookmarks, "tree_changed",
                     G_CALLBACK (bookmarks_tree_changed_cb),
                     menu, 0);

    menu->priv->ui_id = 0;
    menu->priv->action_group = NULL;
    menu->priv->update_tag = 0;
}

static void
ephy_bookmarks_menu_finalize (GObject *o)
{
    EphyBookmarksMenu *menu = EPHY_BOOKMARKS_MENU (o);
    EphyBookmarksMenuPrivate *p = menu->priv;

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

    if (p->action_group != NULL)
    {
        g_object_unref (p->action_group);
    }

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

EphyBookmarksMenu *
ephy_bookmarks_menu_new (EphyWindow *window)
{
    EphyBookmarksMenu *ret = g_object_new (EPHY_TYPE_BOOKMARKS_MENU,
                           "EphyWindow", window,
                           NULL);
    return ret;
}