path: root/src/prefs-dialog.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright © 200-2003 Marco Pesenti Gritti
 *  Copyright © 2003, 2004, 2005 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 "prefs-dialog.h"
#include "ephy-dialog.h"
#include "ephy-prefs.h"
#include "ephy-embed-container.h"
#include "ephy-embed-shell.h"
#include "ephy-favicon-cache.h"
#include "ephy-session.h"
#include "ephy-embed-prefs.h"
#include "ephy-embed-single.h"
#include "ephy-shell.h"
#include "ephy-gui.h"
#include "eel-gconf-extensions.h"
#include "ephy-langs.h"
#include "ephy-encodings.h"
#include "ephy-debug.h"
#include "ephy-file-chooser.h"
#include "ephy-file-helpers.h"
#include "ephy-tree-model-node.h"
#include "ephy-tree-model-sort.h"
#include "pdm-dialog.h"

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

#define DOWNLOAD_BUTTON_WIDTH   8

static void prefs_dialog_class_init (PrefsDialogClass *klass);
static void prefs_dialog_init       (PrefsDialog *pd);

#include "languages.h"

static const char * const cookies_accept_enum [] =
{
    "anywhere", "current site", "nowhere"
};

enum
{
    WINDOW_PROP,
    NOTEBOOK_PROP,

    /* General */
    HOMEPAGE_ENTRY_PROP,
    HOMEPAGE_CURRENT_PROP,
    HOMEPAGE_BLANK_PROP,
    AUTO_OPEN_PROP,
    DOWNLOAD_PATH_HBOX_PROP,
    DOWNLOAD_PATH_LABEL_PROP,
    WEB_INSPECTOR_BUTTON_PROP,

    /* Fonts and Colors */
    USE_FONTS_PROP,
    MIN_SIZE_PROP,
    USE_COLORS_PROP,
    SMOOTHSCROLL_PROP,
    CSS_CONTAINER_PROP,
    CSS_CHECKBOX_PROP,
    CSS_EDIT_BOX_PROP,
    CSS_EDIT_BUTTON_PROP,

    /* Privacy */
    ALLOW_POPUPS_PROP,
    ALLOW_JAVA_PROP,
    ALLOW_JS_PROP,
    ACCEPT_COOKIES_PROP,
    REMEMBER_PASSWORDS_PROP,
    DISK_CACHE_PROP,
    CLEAR_CACHE_BUTTON_PROP,

    /* Language */
    DEFAULT_ENCODING_PROP,
    DEFAULT_ENCODING_LABEL_PROP,
    LANGUAGE_ADD_BUTTON_PROP,
    LANGUAGE_REMOVE_BUTTON_PROP,
    LANGUAGE_UP_BUTTON_PROP,
    LANGUAGE_DOWN_BUTTON_PROP,
    LANGUAGE_TREEVIEW_PROP
};

static const
EphyDialogProperty properties [] =
{
    { "prefs_dialog",   NULL, PT_NORMAL, 0},
    { "prefs_notebook", NULL, PT_NORMAL, 0},

    /* General */
    { "homepage_entry",         CONF_GENERAL_HOMEPAGE,      PT_AUTOAPPLY,  G_TYPE_STRING },
    { "homepage_current_button",        NULL,               PT_NORMAL,     0 },
    { "homepage_blank_button",      NULL,               PT_NORMAL,     0 },
    { "automatic_downloads_checkbutton",    CONF_AUTO_DOWNLOADS,        PT_AUTOAPPLY,  0 },
    { "download_button_hbox",       NULL,               PT_NORMAL,     0 },
    { "download_button_label",      NULL,               PT_NORMAL,     0 },
    { "web_inspector_checkbutton",          CONF_WEB_INSPECTOR_ENABLED, PT_AUTOAPPLY,  0 },

    /* Fonts and Colors */
    { "use_fonts_checkbutton",  CONF_RENDERING_USE_OWN_FONTS,   PT_AUTOAPPLY | PT_INVERTED, 0 },
    { "min_size_spinbutton",    CONF_RENDERING_FONT_MIN_SIZE,   PT_AUTOAPPLY,   0 },
    { "use_colors_checkbutton", CONF_RENDERING_USE_OWN_COLORS,  PT_AUTOAPPLY | PT_INVERTED, 0 },
    { "smoothscroll_button",    CONF_DISPLAY_SMOOTHSCROLL,  PT_AUTOAPPLY,   0 },
    { "css_container",      NULL,               PT_NORMAL,  0 },
    { "css_checkbox",       CONF_USER_CSS_ENABLED,      PT_AUTOAPPLY,   0 },
    { "css_edit_box",       NULL,               PT_NORMAL,  0 },
    { "css_edit_button",        NULL,               PT_NORMAL,  0 },

    /* Privacy */
    { "popups_allow_checkbutton",       CONF_SECURITY_ALLOW_POPUPS,   PT_AUTOAPPLY, 0 },
    { "enable_java_checkbutton",        CONF_SECURITY_JAVA_ENABLED,   PT_AUTOAPPLY, 0 },
    { "enable_javascript_checkbutton",  CONF_SECURITY_JAVASCRIPT_ENABLED, PT_AUTOAPPLY, 0 },
    { "cookies_radiobutton",        CONF_SECURITY_COOKIES_ACCEPT,     PT_AUTOAPPLY, G_TYPE_STRING },
    { "remember_passwords_checkbutton", CONF_PRIVACY_REMEMBER_PASSWORDS,  PT_AUTOAPPLY, 0 },
    { "disk_cache_spin",            CONF_NETWORK_CACHE_SIZE,      PT_AUTOAPPLY, 0 },
    { "clear_cache_button",         NULL,                 PT_NORMAL,    0 },

    /* Languages */
    { "default_encoding_combo", CONF_LANGUAGE_DEFAULT_ENCODING,     PT_AUTOAPPLY,   G_TYPE_STRING },
    { "default_encoding_label", NULL,                   PT_NORMAL,  0 },
    { "lang_add_button",        NULL,                   PT_NORMAL,  0 },
    { "lang_remove_button",     NULL,                   PT_NORMAL,  0 },
    { "lang_up_button",     NULL,                   PT_NORMAL,  0 },
    { "lang_down_button",       NULL,                   PT_NORMAL,  0 },
    { "lang_treeview",      NULL,                   PT_NORMAL,  0 },

    { NULL }
};

enum
{
    LANGUAGE_DIALOG,
    LANGUAGE_PROP,
    LANGUAGE_ACCEPT_BUTTON_PROP
};

static const
EphyDialogProperty add_lang_props [] =
{
    { "add_language_dialog", NULL,  PT_NORMAL,  0 },
    { "languages_treeview",  NULL,  PT_NORMAL,  G_TYPE_STRING },
    { "add_button",      NULL,  PT_NORMAL,  0 },

    { NULL }
};

enum
{
    COL_LANG_NAME,
    COL_LANG_CODE
};

#define EPHY_PREFS_DIALOG_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_PREFS_DIALOG, PrefsDialogPrivate))

struct PrefsDialogPrivate
{
    GtkTreeView *lang_treeview;
    GtkTreeModel *lang_model;
    EphyDialog *add_lang_dialog;
    GtkWidget *lang_add_button;
    GtkWidget *lang_remove_button;
    GtkWidget *lang_up_button;
    GtkWidget *lang_down_button;
    GHashTable *iso_639_table;
    GHashTable *iso_3166_table;
};

G_DEFINE_TYPE (PrefsDialog, prefs_dialog, EPHY_TYPE_DIALOG)

static void
prefs_dialog_finalize (GObject *object)
{
    PrefsDialog *dialog = EPHY_PREFS_DIALOG (object);
    PrefsDialogPrivate *priv = dialog->priv;

    if (priv->add_lang_dialog != NULL)
    {
        EphyDialog **add_lang_dialog = &priv->add_lang_dialog;

        g_object_remove_weak_pointer
                (G_OBJECT (priv->add_lang_dialog),
                 (gpointer *) add_lang_dialog);
        g_object_unref (priv->add_lang_dialog);
    }

    g_hash_table_destroy (priv->iso_639_table);
    g_hash_table_destroy (priv->iso_3166_table);

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

static void
prefs_dialog_class_init (PrefsDialogClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = prefs_dialog_finalize;

    g_type_class_add_private (object_class, sizeof(PrefsDialogPrivate));
}

static void
prefs_dialog_show_help (EphyDialog *dialog)
{
    GtkWidget *window, *notebook;
    int id;

    static const char help_preferences[][28] = {
        "general-preferences",
        "fonts-and-style-preferences",
        "privacy-preferences",
        "language-preferences"
    };

    ephy_dialog_get_controls (dialog,
                  properties[WINDOW_PROP].id, &window,
                  properties[NOTEBOOK_PROP].id, &notebook,
                  NULL);

    id = gtk_notebook_get_current_page (GTK_NOTEBOOK (notebook));
    id = CLAMP (id, 0, 3);

    ephy_gui_help (GTK_WINDOW (window), "epiphany", help_preferences[id]);
}

static void
css_checkbox_toggled (GtkToggleButton *button,
              GtkWidget *widget)
{
    g_object_set (widget, "sensitive", gtk_toggle_button_get_active (button), NULL);
}

static void
css_edit_button_clicked_cb (GtkWidget *button,
                PrefsDialog *pd)
{
    GFile *css_file;

    css_file = g_file_new_for_path (g_build_filename (ephy_dot_dir (),
                              USER_STYLESHEET_FILENAME,
                              NULL));

    ephy_file_launch_handler ("text/plain", css_file,
                  gtk_get_current_event_time ());
    g_object_unref (css_file);
}

static void
create_node_combo (EphyDialog *dialog,
           int prop,
           EphyEncodings *encodings,
           EphyNode *node,
           const char *key,
           const char *default_value)
{
    EphyTreeModelNode *nodemodel;
    GtkTreeModel *sortmodel;
    GtkComboBox *combo;
    GtkCellRenderer *renderer;
    char *code;
    int title_col, data_col;

    code = eel_gconf_get_string (key);
    if (code == NULL || ephy_encodings_get_node (encodings, code, FALSE) == NULL)
    {
        /* safe default */
        eel_gconf_set_string (key, default_value);
    }
    g_free (code);

    combo = GTK_COMBO_BOX (ephy_dialog_get_control (dialog, properties[prop].id));

    nodemodel = ephy_tree_model_node_new (node);

    title_col = ephy_tree_model_node_add_prop_column
            (nodemodel, G_TYPE_STRING, EPHY_NODE_ENCODING_PROP_TITLE_ELIDED);
    data_col = ephy_tree_model_node_add_prop_column
            (nodemodel, G_TYPE_STRING, EPHY_NODE_ENCODING_PROP_ENCODING);

    sortmodel = ephy_tree_model_sort_new (GTK_TREE_MODEL (nodemodel));

    gtk_tree_sortable_set_sort_column_id
        (GTK_TREE_SORTABLE (sortmodel), title_col, GTK_SORT_ASCENDING);

    gtk_combo_box_set_model (combo, GTK_TREE_MODEL (sortmodel));

        renderer = gtk_cell_renderer_text_new ();
        gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
        gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
                                        "text", title_col,
                                        NULL);

    ephy_dialog_set_data_column (dialog, properties[prop].id, data_col);

    g_object_unref (nodemodel);
    g_object_unref (sortmodel);
}

static void
language_editor_add (PrefsDialog *pd,
             const char *code,
             const char *desc)
{
    GtkTreeIter iter;

    g_return_if_fail (code != NULL && desc != NULL);

    if (gtk_tree_model_get_iter_first (pd->priv->lang_model, &iter))
    {
        do
        {
            char *c;

            gtk_tree_model_get (pd->priv->lang_model, &iter,
                        COL_LANG_CODE, &c,
                        -1);

            if (strcmp (code, c) == 0)
            {
                g_free (c);

                /* already in list, don't allow a duplicate */
                return;
            }
            g_free (c);
        }
        while (gtk_tree_model_iter_next (pd->priv->lang_model, &iter));
    }

    gtk_list_store_append (GTK_LIST_STORE (pd->priv->lang_model), &iter);
    
    gtk_list_store_set (GTK_LIST_STORE (pd->priv->lang_model), &iter,
                COL_LANG_NAME, desc,
                COL_LANG_CODE, code,
                -1);
}

static void
language_editor_update_pref (PrefsDialog *pd)
{
    GtkTreeIter iter;
    GSList *codes = NULL;

    if (gtk_tree_model_get_iter_first (pd->priv->lang_model, &iter))
    {
        do
        {
            char *code;
        
            gtk_tree_model_get (pd->priv->lang_model, &iter,
                        COL_LANG_CODE, &code,
                        -1);

            codes = g_slist_prepend (codes, code);
        }
        while (gtk_tree_model_iter_next (pd->priv->lang_model, &iter));
    }

    codes = g_slist_reverse (codes);
    eel_gconf_set_string_list (CONF_RENDERING_LANGUAGE, codes);

    g_slist_foreach (codes, (GFunc) g_free, NULL);
    g_slist_free (codes);
}

static void
language_editor_update_buttons (PrefsDialog *dialog)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;
    gboolean can_remove = FALSE, can_move_up = FALSE, can_move_down = FALSE;
    int selected;

    selection = gtk_tree_view_get_selection (dialog->priv->lang_treeview);

    if (gtk_tree_selection_get_selected (selection, &model, &iter))
    {
        path = gtk_tree_model_get_path (model, &iter);
    
        selected = gtk_tree_path_get_indices (path)[0];

        can_remove = TRUE;
        can_move_up = selected > 0;
        can_move_down = 
            selected < gtk_tree_model_iter_n_children (model, NULL) - 1;

        gtk_tree_path_free (path);
    }

    gtk_widget_set_sensitive (dialog->priv->lang_remove_button, can_remove);
    gtk_widget_set_sensitive (dialog->priv->lang_up_button, can_move_up);
    gtk_widget_set_sensitive (dialog->priv->lang_down_button, can_move_down);
}

static void
add_lang_dialog_selection_changed (GtkTreeSelection *selection,
                   EphyDialog *dialog)
{
    GtkWidget *button;
    int n_selected;

    button = ephy_dialog_get_control (dialog, add_lang_props[LANGUAGE_ACCEPT_BUTTON_PROP].id);

    n_selected = gtk_tree_selection_count_selected_rows (selection);
    gtk_widget_set_sensitive (button, n_selected > 0);
}

static void
add_lang_dialog_response_cb (GtkWidget *widget,
                 int response,
                 PrefsDialog *pd)
{
    EphyDialog *dialog = pd->priv->add_lang_dialog;
    GtkTreeView *treeview;
    GtkTreeModel *model;
    GtkTreeSelection *selection;
    GtkTreeIter iter;
    GList *rows, *r;

    g_return_if_fail (dialog != NULL);

    if (response == GTK_RESPONSE_ACCEPT)
    {
        treeview = GTK_TREE_VIEW (ephy_dialog_get_control
                (dialog, add_lang_props[LANGUAGE_PROP].id));
        selection = gtk_tree_view_get_selection (treeview);

        rows = gtk_tree_selection_get_selected_rows (selection, &model);

        for (r = rows; r != NULL; r = r->next)
        {
            GtkTreePath *path = (GtkTreePath *) r->data;

            if (gtk_tree_model_get_iter (model, &iter, path))
            {
                char *code, *desc;
                
                gtk_tree_model_get (model, &iter,
                            COL_LANG_NAME, &desc,
                            COL_LANG_CODE, &code,
                            -1);

                language_editor_add (pd, code, desc);
        
                g_free (desc);
                g_free (code);
            }
        }           

        g_list_foreach (rows, (GFunc) gtk_tree_path_free, NULL);
        g_list_free (rows);

        language_editor_update_pref (pd);
        language_editor_update_buttons (pd);
    }

    g_object_unref (dialog);
}

static char *
get_name_for_lang_code (PrefsDialog *pd,
            const char *code)
{
    char **str;
    char *name;
    const char *langname, *localename;
    int len;

    str = g_strsplit (code, "-", -1);
    len = g_strv_length (str);
    g_return_val_if_fail (len != 0, NULL);

    langname = (const char *) g_hash_table_lookup (pd->priv->iso_639_table, str[0]);

    if (len == 1 && langname != NULL)
    {
        name = g_strdup (dgettext (ISO_639_DOMAIN, langname));
    }
    else if (len == 2 && langname != NULL)
    {
        localename = (const char *) g_hash_table_lookup (pd->priv->iso_3166_table, str[1]);

        if (localename != NULL)
        {
            /* Translators: the first %s is the language name, and the
             * second %s is the locale name. Example:
             * "French (France)"
             */
            name = g_strdup_printf (C_("language", "%s (%s)"),
                        dgettext (ISO_639_DOMAIN, langname),
                        dgettext (ISO_3166_DOMAIN, localename));
        }
        else
        {
            name = g_strdup_printf (C_("language", "%s (%s)"),
                        dgettext (ISO_639_DOMAIN, langname), str[1]);
        }
    }
    else
    {
        /* Translators: this refers to a user-define language code
         * (one which isn't in our built-in list).
         */
        name = g_strdup_printf (C_("language", "User defined (%s)"), code);
    }

    g_strfreev (str);

    return name;
}

static void
add_system_language_entry (GtkListStore *store)
{
    GtkTreeIter iter;
    char **sys_langs;
    char *system, *text;
    int n_sys_langs;

    sys_langs = ephy_langs_get_languages ();
    n_sys_langs = g_strv_length (sys_langs);

    system = g_strjoinv (", ", sys_langs);

    text = g_strdup_printf
        (ngettext ("System language (%s)",
               "System languages (%s)", n_sys_langs), system);

    gtk_list_store_append (store, &iter);
    gtk_list_store_set (store, &iter,
                COL_LANG_NAME, text,
                COL_LANG_CODE, "system",
                -1);

    g_strfreev (sys_langs);
    g_free (system);
    g_free (text);
}

static EphyDialog *
setup_add_language_dialog (PrefsDialog *pd)
{
    EphyDialog *dialog;
    GtkWidget *window, *parent;
    GtkListStore *store;
    GtkTreeModel *sortmodel;
    GtkTreeView *treeview;
    GtkCellRenderer *renderer;
    GtkTreeViewColumn *column;
    GtkTreeSelection *selection;
    GtkTreeIter iter;
    int i;

    parent = ephy_dialog_get_control (EPHY_DIALOG (pd), properties[WINDOW_PROP].id);

    dialog =  EPHY_DIALOG (g_object_new (EPHY_TYPE_DIALOG,
                         "parent-window", parent,
                         "default-width", 260,
                         "default-height", 230,
                         NULL));

    ephy_dialog_construct (dialog, 
                   add_lang_props,
                   ephy_file ("prefs-dialog.ui"),
                   "add_language_dialog",
                   NULL);

    store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);

    for (i = 0; i < G_N_ELEMENTS (languages); i++)
    {
        const char *code = languages[i];
        char *name;

        name = get_name_for_lang_code (pd, code);
        
        gtk_list_store_append (store, &iter);
        gtk_list_store_set (store, &iter,
                    COL_LANG_NAME, name,
                    COL_LANG_CODE, code,
                    -1);
        g_free (name);
    }

    add_system_language_entry (store);

    sortmodel = gtk_tree_model_sort_new_with_model (GTK_TREE_MODEL (store));
    gtk_tree_sortable_set_sort_column_id
        (GTK_TREE_SORTABLE (sortmodel), COL_LANG_NAME, GTK_SORT_ASCENDING);

    ephy_dialog_get_controls (dialog,
                  add_lang_props[LANGUAGE_PROP].id, &treeview,
                  add_lang_props[LANGUAGE_DIALOG].id, &window,
                  NULL);

    gtk_window_group_add_window (GTK_WINDOW (parent)->group, GTK_WINDOW (window));
    gtk_window_set_modal (GTK_WINDOW (window), TRUE);

    gtk_tree_view_set_reorderable (GTK_TREE_VIEW (treeview), FALSE);

    gtk_tree_view_set_model (treeview, sortmodel);

    gtk_tree_view_set_headers_visible (treeview, FALSE);

    renderer = gtk_cell_renderer_text_new ();

    gtk_tree_view_insert_column_with_attributes (treeview,
                             0, "Language",
                             renderer,
                             "text", 0,
                             NULL);
    column = gtk_tree_view_get_column (treeview, 0);
    gtk_tree_view_column_set_resizable (column, TRUE);
    gtk_tree_view_column_set_sort_column_id (column, COL_LANG_NAME);

    selection = gtk_tree_view_get_selection (treeview);
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
    
    add_lang_dialog_selection_changed (GTK_TREE_SELECTION (selection), dialog);
    g_signal_connect (selection, "changed",
              G_CALLBACK (add_lang_dialog_selection_changed), dialog);

    g_signal_connect (window, "response",
              G_CALLBACK (add_lang_dialog_response_cb), pd);

    g_object_unref (store);
    g_object_unref (sortmodel);

    return dialog;
}

static void
language_editor_add_button_clicked_cb (GtkWidget *button,
                       PrefsDialog *pd)
{
    if (pd->priv->add_lang_dialog == NULL)
    {
        EphyDialog **add_lang_dialog;

        pd->priv->add_lang_dialog = setup_add_language_dialog (pd);

        add_lang_dialog = &pd->priv->add_lang_dialog;

        g_object_add_weak_pointer
            (G_OBJECT (pd->priv->add_lang_dialog),
            (gpointer *) add_lang_dialog);
    }

    ephy_dialog_show (pd->priv->add_lang_dialog);
}

static void
language_editor_remove_button_clicked_cb (GtkWidget *button,
                      PrefsDialog *pd)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;

    selection = gtk_tree_view_get_selection (pd->priv->lang_treeview);

    if (gtk_tree_selection_get_selected (selection, &model, &iter))
    {
        gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
    }

    language_editor_update_pref (pd);
    language_editor_update_buttons (pd);
}

static void
language_editor_up_button_clicked_cb (GtkWidget *button,
                      PrefsDialog *pd)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter, iter_prev;
    GtkTreePath *path;

    selection = gtk_tree_view_get_selection (pd->priv->lang_treeview);

    if (gtk_tree_selection_get_selected (selection, &model, &iter))
    {
        path = gtk_tree_model_get_path (model, &iter);

        if (!gtk_tree_path_prev (path))
        {
            gtk_tree_path_free (path);
            return;
        }

        gtk_tree_model_get_iter (model, &iter_prev, path);

        gtk_list_store_swap (GTK_LIST_STORE (model), &iter_prev, &iter);

        gtk_tree_path_free (path);
    }

    language_editor_update_pref (pd);
    language_editor_update_buttons (pd);
}

static void
language_editor_down_button_clicked_cb (GtkWidget *button,
                    PrefsDialog *pd)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter, iter_next;
    GtkTreePath *path;


    selection = gtk_tree_view_get_selection (pd->priv->lang_treeview);

    if (gtk_tree_selection_get_selected (selection, &model, &iter))
    {
        path = gtk_tree_model_get_path (model, &iter);

        gtk_tree_path_next (path);

        gtk_tree_model_get_iter (model, &iter_next, path);

        gtk_list_store_swap (GTK_LIST_STORE (model), &iter, &iter_next);

        gtk_tree_path_free (path);
    }

    language_editor_update_pref (pd);
    language_editor_update_buttons (pd);
}

static void
language_editor_treeview_drag_end_cb (GtkWidget *widget,
                      GdkDragContext *context,
                      PrefsDialog *dialog)
{
    language_editor_update_pref (dialog);
    language_editor_update_buttons (dialog);
}

static void
language_editor_selection_changed_cb (GtkTreeSelection *selection,
                      PrefsDialog *dialog)
{
    language_editor_update_buttons (dialog);
}

static void
create_language_section (EphyDialog *dialog)
{
    PrefsDialog *pd = EPHY_PREFS_DIALOG (dialog);
    GtkListStore *store;
    GtkTreeView *treeview;
    GtkCellRenderer *renderer;
    GtkTreeViewColumn *column;
    GtkTreeSelection *selection;
    GSList *list, *l, *ulist = NULL;

    pd->priv->iso_639_table = ephy_langs_iso_639_table ();
    pd->priv->iso_3166_table = ephy_langs_iso_3166_table ();

    ephy_dialog_get_controls
        (dialog,
         properties[LANGUAGE_TREEVIEW_PROP].id, &treeview,
         properties[LANGUAGE_ADD_BUTTON_PROP].id, &pd->priv->lang_add_button,
         properties[LANGUAGE_REMOVE_BUTTON_PROP].id, &pd->priv->lang_remove_button,
         properties[LANGUAGE_UP_BUTTON_PROP].id, &pd->priv->lang_up_button, 
         properties[LANGUAGE_DOWN_BUTTON_PROP].id, &pd->priv->lang_down_button,
         NULL);

    g_signal_connect (pd->priv->lang_add_button, "clicked",
              G_CALLBACK (language_editor_add_button_clicked_cb), dialog);
    g_signal_connect (pd->priv->lang_remove_button, "clicked",
              G_CALLBACK (language_editor_remove_button_clicked_cb), dialog);
    g_signal_connect (pd->priv->lang_up_button, "clicked",
              G_CALLBACK (language_editor_up_button_clicked_cb), dialog);
    g_signal_connect (pd->priv->lang_down_button, "clicked",
              G_CALLBACK (language_editor_down_button_clicked_cb), dialog);

    /* setup the languages treeview */
    pd->priv->lang_treeview = treeview;

    gtk_tree_view_set_reorderable (GTK_TREE_VIEW (treeview), TRUE);

    store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);

    pd->priv->lang_model = GTK_TREE_MODEL (store);

    gtk_tree_view_set_model (treeview, pd->priv->lang_model);
    g_object_unref (store);

    gtk_tree_view_set_headers_visible (treeview, FALSE);

    renderer = gtk_cell_renderer_text_new ();

    gtk_tree_view_insert_column_with_attributes (treeview,
                             0, _("Language"),
                             renderer,
                             "text", 0,
                             NULL);
    column = gtk_tree_view_get_column (treeview, 0);
    gtk_tree_view_column_set_resizable (column, TRUE);
    gtk_tree_view_column_set_sort_column_id (column, COL_LANG_NAME);

    selection = gtk_tree_view_get_selection (treeview);
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);

    /* Connect treeview signals */
    g_signal_connect (G_OBJECT (treeview), "drag_end",
              G_CALLBACK (language_editor_treeview_drag_end_cb), pd);
    g_signal_connect (G_OBJECT (selection), "changed",
              G_CALLBACK (language_editor_selection_changed_cb), pd);

    list = eel_gconf_get_string_list (CONF_RENDERING_LANGUAGE);

    /* uniquify list */
    for (l = list; l != NULL; l = l->next)
    {
        if (g_slist_find_custom (ulist, l->data, (GCompareFunc) strcmp) == NULL)
        {
            ulist = g_slist_prepend (ulist, g_strdup (l->data));
        }
    }
    ulist = g_slist_reverse (ulist);

    /* if modified, write back */
    if (g_slist_length (ulist) != g_slist_length (list))
    {
        eel_gconf_set_string_list (CONF_RENDERING_LANGUAGE, ulist);
    }

    /* Fill languages editor */
    for (l = ulist; l != NULL; l = l->next)
    {
        const char *code = (const char *) l->data;

        if (strcmp (code, "system") == 0)
        {
            add_system_language_entry (store);
        }
        else if (code[0] != '\0')
        {
            char *text;

            text = get_name_for_lang_code (pd, code);
            language_editor_add (pd, code, text);
            g_free (text);
        }
    }

    language_editor_update_buttons (pd);

    /* Lockdown if key is not writable */
    if (eel_gconf_key_is_writable (CONF_RENDERING_LANGUAGE) == FALSE)
    {
        gtk_widget_set_sensitive (pd->priv->lang_add_button, FALSE);
        gtk_widget_set_sensitive (pd->priv->lang_remove_button, FALSE);
        gtk_widget_set_sensitive (pd->priv->lang_up_button, FALSE);
        gtk_widget_set_sensitive (pd->priv->lang_down_button, FALSE);
        gtk_widget_set_sensitive (GTK_WIDGET (pd->priv->lang_treeview), FALSE);
    }

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

    g_slist_foreach (ulist, (GFunc) g_free, NULL);
    g_slist_free (ulist);
}

static void
download_path_changed_cb (GtkFileChooser *button)
{
    char *dir, *downloads_dir, *desktop_dir;

    /* FIXME: use _uri variant when we support downloading 
     * to gnome-vfs remote locations
     */
    dir = gtk_file_chooser_get_filename (button);
    if (dir == NULL) return;

    downloads_dir = ephy_file_downloads_dir ();
    desktop_dir = ephy_file_desktop_dir ();
    g_return_if_fail (downloads_dir != NULL && desktop_dir != NULL);

    if (strcmp (dir, downloads_dir) == 0)
    {
        eel_gconf_set_string (CONF_STATE_DOWNLOAD_DIR, "Downloads");
    }
    else if (strcmp (dir, desktop_dir) == 0)
    {
        eel_gconf_set_string (CONF_STATE_DOWNLOAD_DIR, "Desktop");
    }
    else
    {
        eel_gconf_set_path (CONF_STATE_DOWNLOAD_DIR, dir);
    }

    g_free (dir);
    g_free (downloads_dir);
    g_free (desktop_dir);
}

static void
create_download_path_button (EphyDialog *dialog)
{
    GtkWidget *parent, *hbox, *label, *button;
    EphyFileChooser *fc;
    char *dir;

    dir = ephy_file_get_downloads_dir ();

    ephy_dialog_get_controls (dialog,
                  properties[DOWNLOAD_PATH_HBOX_PROP].id, &hbox,
                  properties[DOWNLOAD_PATH_LABEL_PROP].id, &label,
                  properties[WINDOW_PROP].id, &parent,
                  NULL);

    fc = ephy_file_chooser_new (_("Select a Directory"),
                    parent,
                    GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
                    NULL, EPHY_FILE_FILTER_NONE);

    /* Unset the destroy-with-parent, since gtkfilechooserbutton doesn't expect this */
    gtk_window_set_destroy_with_parent (GTK_WINDOW (fc), FALSE);

    button = gtk_file_chooser_button_new_with_dialog (GTK_WIDGET (fc));
    gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (button), dir);
    gtk_file_chooser_button_set_width_chars (GTK_FILE_CHOOSER_BUTTON (button),
                         DOWNLOAD_BUTTON_WIDTH);
    g_signal_connect (button, "current-folder-changed",
              G_CALLBACK (download_path_changed_cb), dialog);
    gtk_label_set_mnemonic_widget (GTK_LABEL (label), button);
    gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
    gtk_widget_show (button);

    gtk_widget_set_sensitive (button, eel_gconf_key_is_writable (CONF_STATE_DOWNLOAD_DIR));
    g_free (dir);
}

static void
prefs_dialog_response_cb (GtkDialog *widget,
              int response,
              EphyDialog *dialog)
{
    if (response == GTK_RESPONSE_HELP)
    {
        prefs_dialog_show_help (dialog);
        return;
    }
        
    g_object_unref (dialog);
}

static void
prefs_clear_cache_button_clicked_cb (GtkWidget *button,
                     PrefsDialog *dialog)
{
    GtkWidget *parent;

    parent = ephy_dialog_get_control (EPHY_DIALOG (dialog),
                      properties[WINDOW_PROP].id);
    pdm_dialog_show_clear_all_dialog (EPHY_DIALOG (dialog),
                      parent,
                      CLEAR_ALL_CACHE);
}

static void
set_homepage_entry (EphyDialog *dialog,
            const char *new_location)
{
    GValue value = { 0, };

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, new_location);
    ephy_dialog_set_value (dialog, properties[HOMEPAGE_ENTRY_PROP].id, &value);
    g_value_unset (&value);
}

static void
prefs_homepage_current_button_clicked_cb (GtkWidget *button,
                      EphyDialog *dialog)
{
    EphySession *session;
    EphyWindow *window;
    EphyEmbed *embed;

    session = EPHY_SESSION (ephy_shell_get_session (ephy_shell_get_default ()));
    window = ephy_session_get_active_window (session);

    /* can't do anything in this case */
    if (window == NULL) return;

    embed = ephy_embed_container_get_active_child 
          (EPHY_EMBED_CONTAINER (window));
    g_return_if_fail (embed != NULL);

    set_homepage_entry (dialog, ephy_embed_get_address (embed));
}

static void
prefs_homepage_blank_button_clicked_cb (GtkWidget *button,
                    EphyDialog *dialog)
{
    set_homepage_entry (dialog, NULL);
}

static void
prefs_dialog_init (PrefsDialog *pd)
{
    EphyDialog *dialog = EPHY_DIALOG (pd);
    EphyEncodings *encodings;
    GtkWidget *window, *curr_button, *blank_button;
    GtkWidget *clear_cache_button;
    GtkWidget *css_checkbox, *css_edit_box, *css_edit_button, *css_container;
    gboolean sensitive;

    pd->priv = EPHY_PREFS_DIALOG_GET_PRIVATE (pd);

    ephy_dialog_construct (dialog,
                   properties,
                   ephy_file ("prefs-dialog.ui"),
                   "prefs_dialog",
                   NULL);

    ephy_dialog_add_enum (dialog, properties[ACCEPT_COOKIES_PROP].id,
                  G_N_ELEMENTS (cookies_accept_enum), cookies_accept_enum);

    ephy_dialog_get_controls
        (dialog,
         properties[WINDOW_PROP].id, &window,
         properties[HOMEPAGE_CURRENT_PROP].id, &curr_button,
         properties[HOMEPAGE_BLANK_PROP].id, &blank_button,
         properties[CSS_CHECKBOX_PROP].id, &css_checkbox,
         properties[CSS_EDIT_BOX_PROP].id, &css_edit_box,
         properties[CSS_EDIT_BUTTON_PROP].id, &css_edit_button,
         properties[CSS_CONTAINER_PROP].id, &css_container,
         properties[CLEAR_CACHE_BUTTON_PROP].id, &clear_cache_button,
         NULL);

    ephy_gui_ensure_window_group (GTK_WINDOW (window));

    g_signal_connect (window, "response",
              G_CALLBACK (prefs_dialog_response_cb), dialog);

    g_signal_connect (curr_button, "clicked",
              G_CALLBACK (prefs_homepage_current_button_clicked_cb), dialog);
    g_signal_connect (blank_button, "clicked",
              G_CALLBACK (prefs_homepage_blank_button_clicked_cb), dialog);

    /* set homepage button sensitivity */
    sensitive = eel_gconf_key_is_writable (CONF_GENERAL_HOMEPAGE);
    gtk_widget_set_sensitive (curr_button, sensitive);
    gtk_widget_set_sensitive (blank_button, sensitive);

    css_checkbox_toggled (GTK_TOGGLE_BUTTON (css_checkbox), css_edit_box);
    g_signal_connect (css_checkbox, "toggled",
              G_CALLBACK (css_checkbox_toggled), css_edit_box);

    g_signal_connect (css_edit_button, "clicked",
              G_CALLBACK (css_edit_button_clicked_cb), dialog);

    g_signal_connect (clear_cache_button, "clicked",
              G_CALLBACK (prefs_clear_cache_button_clicked_cb), dialog);

    encodings = EPHY_ENCODINGS (ephy_embed_shell_get_encodings
                    (EPHY_EMBED_SHELL (ephy_shell)));

    create_node_combo (dialog, DEFAULT_ENCODING_PROP, encodings,
               ephy_encodings_get_all (encodings),
               CONF_LANGUAGE_DEFAULT_ENCODING, "ISO-8859-1");

    create_language_section (dialog);

    create_download_path_button (dialog);
}