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/*
 *  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.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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

#include "ephy-start-here.h"
#include "ephy-file-helpers.h"

struct EphyStartHerePrivate
{
    const GList *langs;
    char *base_uri;
    xmlDocPtr doc;
};

static void
ephy_start_here_class_init (EphyStartHereClass *klass);
static void
ephy_start_here_init (EphyStartHere *tab);
static void
ephy_start_here_finalize (GObject *object);

static GObjectClass *parent_class = NULL;

GType
ephy_start_here_get_type (void)
{
        static GType ephy_start_here_type = 0;

        if (ephy_start_here_type == 0)
        {
                static const GTypeInfo our_info =
                {
                        sizeof (EphyStartHereClass),
                        NULL, /* base_init */
                        NULL, /* base_finalize */
                        (GClassInitFunc) ephy_start_here_class_init,
                        NULL,
                        NULL, /* class_data */
                        sizeof (EphyStartHere),
                        0, /* n_preallocs */
                        (GInstanceInitFunc) ephy_start_here_init
                };

                ephy_start_here_type = g_type_register_static (G_TYPE_OBJECT,
                                  "EphyStartHere",
                                  &our_info, 0);
        }

        return ephy_start_here_type;
}

static void
ephy_start_here_class_init (EphyStartHereClass *klass)
{
        GObjectClass *object_class = G_OBJECT_CLASS (klass);

        parent_class = g_type_class_peek_parent (klass);

        object_class->finalize = ephy_start_here_finalize;
}

static void
ephy_start_here_init (EphyStartHere *eb)
{
        eb->priv = g_new0 (EphyStartHerePrivate, 1);

    eb->priv->langs = gnome_i18n_get_language_list ("LC_MESSAGES");
    eb->priv->base_uri = g_strconcat ("file://",
                      ephy_file ("starthere/"),
                      NULL);
}

static void
ephy_start_here_finalize (GObject *object)
{
        EphyStartHere *eb;

    g_return_if_fail (IS_EPHY_START_HERE (object));

    eb = EPHY_START_HERE (object);

        g_return_if_fail (eb->priv != NULL);

    g_free (eb->priv->base_uri);

        g_free (eb->priv);

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

EphyStartHere *
ephy_start_here_new ()
{
    EphyStartHere *tab;

    tab = EPHY_START_HERE (g_object_new (EPHY_START_HERE_TYPE, NULL));

    return tab;
}

static gboolean
is_my_lang (EphyStartHere *sh, char *my_lang)
{
    const GList *l;

    for (l = sh->priv->langs; l != NULL; l = l->next)
    {
        char *lang = (char *)l->data;

        if (strcmp (lang, my_lang) == 0)
            return TRUE;
    }

    return FALSE;
}

static xmlNodePtr
drop_other_languages (EphyStartHere *sh,
              const char *node_name,
              xmlNodePtr node)
{
    xmlNodePtr default_node;
    xmlNodePtr res = NULL;
    gboolean use_default = TRUE;

    default_node = node->prev;
    while (default_node && !xmlStrEqual (default_node->name, node_name))
    {
        default_node = default_node->prev;
    }
    g_return_val_if_fail (default_node != NULL, NULL);

    while (node != NULL)
    {
        xmlChar *lang;

        res = node->next;

        lang = xmlNodeGetLang (node);
        if (!is_my_lang (sh, lang))
        {
            xmlUnlinkNode (node);
            xmlFreeNode (node);
        }
        else
        {
            use_default = FALSE;
        }
        xmlFree (lang);

        node = (res && xmlStrEqual (res->name, node_name)) ?
            res : NULL;
    }

    if (!use_default)
    {
        xmlUnlinkNode (default_node);
        xmlFreeNode (default_node);
    }

    return res;
}

static void
select_language (EphyStartHere *sh, xmlNodePtr node)
{
    while (node)
    {
        xmlChar *lang;

        lang = xmlNodeGetLang (node);
        if (lang)
        {
            node = drop_other_languages
                (sh, node->name, node);
            xmlFree (lang);
        }
        else
        {
            select_language (sh, node->children);
            node = node->next;
        }
    }
}

static char *
mozilla_bookmarks (void)
{
    GSList *l;
    char *dir;
    char *result;

    dir = g_build_filename (g_get_home_dir (), ".mozilla", NULL);
    l = ephy_file_find  (dir, "bookmarks.html", 4);
    g_free (dir);

    result = l ? g_strdup (l->data) : NULL;

    g_slist_foreach (l, (GFunc) g_free, NULL);
    g_slist_free (l);

    return result;
}

static char *
galeon_bookmarks (void)
{
    GSList *l;
    char *dir;
    char *result;

    dir = g_build_filename (g_get_home_dir (), ".galeon", NULL);
    l = ephy_file_find  (dir, "bookmarks.xbel", 4);
    g_free (dir);

    result = l ? g_strdup (l->data) : NULL;

    g_slist_foreach (l, (GFunc) g_free, NULL);
    g_slist_free (l);

    return result;
}

static char *
konqueror_bookmarks (void)
{
    GSList *l;
    char *dir;
    char *result;

    dir = g_build_filename (g_get_home_dir (), ".kde", "share",
                "apps", "konqueror", NULL);
    l = ephy_file_find  (dir, "bookmarks.xml", 4);
    g_free (dir);

    result = l ? g_strdup (l->data) : NULL;

    g_slist_foreach (l, (GFunc) g_free, NULL);
    g_slist_free (l);

    return result;
}

static void
attach_content (EphyStartHere *sh, xmlNodePtr node, xmlChar *id)
{
    if (xmlStrEqual (id, "bookmarks-import"))
    {
        xmlNodePtr child;
        char *bmk_file;

        bmk_file = mozilla_bookmarks ();
        if (bmk_file)
        {
            child = xmlNewDocNode (sh->priv->doc, NULL, "action",
                           _("Import Mozilla bookmarks"));
            xmlSetProp (child, "id", "import-mozilla-bookmarks");
            xmlSetProp (child, "param", bmk_file);
            xmlAddChild (node, child);
        }
        g_free (bmk_file);

        bmk_file = galeon_bookmarks ();
        if (bmk_file)
        {
            child = xmlNewDocNode (sh->priv->doc, NULL, "action",
                           _("Import Galeon bookmarks"));
            xmlSetProp (child, "id", "import-galeon-bookmarks");
            xmlSetProp (child, "param", bmk_file);
            xmlAddChild (node, child);
        }
        g_free (bmk_file);

        bmk_file = konqueror_bookmarks ();
        if (bmk_file)
        {
            child = xmlNewDocNode (sh->priv->doc, NULL, "action",
                           _("Import Konqueror bookmarks"));
            xmlSetProp (child, "id", "import-konqueror-bookmarks");
            xmlSetProp (child, "param", bmk_file);
            xmlAddChild (node, child);
        }
        g_free (bmk_file);

    }
}

static char *
color_to_string (GdkColor color)
{
    return g_strdup_printf ("#%.2x%.2x%.2x",
                   color.red >> 8,
                   color.green >> 8,
                   color.blue >> 8);
}

static void
build_content (EphyStartHere *sh, xmlNodePtr node)
{
    while (node)
    {
        xmlChar *id;

        id = xmlGetProp (node, "id");
        if (id)
        {
            attach_content (sh, node, id);
            xmlFree (id);
        }

        if (xmlStrEqual (node->name, "section"))
        {
            GtkWidget *widget, *window;
            GdkColor color;
            char *str;

            /* create a random widget that we will use to get
             * the current style
             */
            window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
            widget = gtk_label_new ("");
            gtk_container_add (GTK_CONTAINER (window), widget);
            gtk_widget_realize (window);
            gtk_widget_realize (widget);
            gtk_widget_ensure_style (widget);

            color = widget->style->bg[GTK_STATE_NORMAL];
            str = color_to_string (color);
            xmlSetProp (node, "bg", str);
            g_free (str);

            color = widget->style->text[GTK_STATE_SELECTED];
            str = color_to_string (color);
            xmlSetProp (node, "title", str);
            g_free (str);

            color = widget->style->bg[GTK_STATE_ACTIVE];
            str = color_to_string (color);
            xmlSetProp (node, "title-bg", str);
            g_free (str);

            color = widget->style->bg[GTK_STATE_SELECTED];
            str = color_to_string (color);
            xmlSetProp (node, "link", str);
            g_free (str);

            color = widget->style->text[GTK_STATE_NORMAL];
            str = color_to_string (color);
            xmlSetProp (node, "text", str);
            g_free (str);

            gtk_widget_destroy (window);
        }

        build_content (sh, node->children);
        node = node->next;
    }
}
char *
ephy_start_here_get_page (EphyStartHere *sh, const char *id)
{
        xmlNodePtr root;
    const char *xml_filepath;
    char *xml_filename;
    xmlChar *content;
    int size;

    xml_filename = g_strconcat ("starthere/", id, ".xml", NULL);
    xml_filepath = ephy_file (xml_filename);
    if (!xml_filepath) return NULL;
    g_free (xml_filename);

    sh->priv->doc = xmlParseFile (xml_filepath);
    root = xmlDocGetRootElement (sh->priv->doc);

    select_language (sh, root);
    build_content (sh, root);

    xmlDocDumpMemory (sh->priv->doc, &content, &size);

    xmlFreeDoc (sh->priv->doc);

    return content;
}

const char *
ephy_start_here_get_base_uri (EphyStartHere *sh)
{
    return sh->priv->base_uri;
}