path: root/src/ephy-encoding-dialog.c

/*
 *  Copyright (C) 2000, 2001, 2002, 2003 Marco Pesenti Gritti
 *  Copyright (C) 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *  $Id$
 */

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

#include "ephy-encoding-dialog.h"
#include "ephy-encodings.h"
#include "ephy-embed.h"
#include "ephy-embed-shell.h"
#include "ephy-shell.h"
#include "ephy-node.h"
#include "ephy-node-view.h"
#include "ephy-debug.h"

#include <gtk/gtklabel.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtktreeview.h>
#include <gtk/gtktreeselection.h>
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkdialog.h>
#include <glib/gi18n.h>
#include <string.h>

enum
{
    SCROLLED_WINDOW_PROP,
    AUTOMATIC_PROP,
    MANUAL_PROP
};

static const
EphyDialogProperty properties [] =
{
    { "scrolled_window",    NULL, PT_NORMAL, 0 },
    { "automatic_button",   NULL, PT_NORMAL, 0 },
    { "manual_button",  NULL, PT_NORMAL, 0 },

    { NULL }
};

#define EPHY_ENCODING_DIALOG_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_ENCODING_DIALOG, EphyEncodingDialogPrivate))

struct EphyEncodingDialogPrivate
{
    EphyEncodings *encodings;
    EphyWindow *window;
    EphyEmbed *embed;
    GtkWidget *enc_view;
    EphyNodeFilter *filter;
    EphyNode *selected_node;
    gboolean update_tag;
};

static void ephy_encoding_dialog_class_init     (EphyEncodingDialogClass *klass);
static void ephy_encoding_dialog_init       (EphyEncodingDialog *ge);
void        ephy_encoding_dialog_response_cb    (GtkWidget *widget,
                             gint response,
                             EphyEncodingDialog *dialog);

static GObjectClass *parent_class = NULL;

GType
ephy_encoding_dialog_get_type (void)
{
    static GType ephy_type_encoding_dialog = 0;

    if (ephy_type_encoding_dialog == 0)
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyEncodingDialogClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            (GClassInitFunc) ephy_encoding_dialog_class_init,
            NULL,
            NULL, /* class_data */
            sizeof (EphyEncodingDialog),
            0, /* n_preallocs */
            (GInstanceInitFunc) ephy_encoding_dialog_init
        };

        ephy_type_encoding_dialog = g_type_register_static (EPHY_TYPE_EMBED_DIALOG,
                                    "EphyEncodingDialog",
                                    &our_info, 0);
    }

    return ephy_type_encoding_dialog;
}

static gboolean
encoding_is_automatic (EphyEncodingInfo *info)
{
    g_return_val_if_fail (info != NULL, FALSE);
    
    return (info->encoding_source < EMBED_ENCODING_PARENT_FORCED);
}

static void
sync_embed_cb (EphyEncodingDialog *dialog, GParamSpec *pspec, gpointer dummy)
{
    EphyEmbed *embed;
    EphyEncodingInfo *info;
    EphyNode *node;
        GtkTreeSelection *selection;
        GtkTreeModel *model;
        GList *rows;
    GtkWidget *button;
    gboolean is_automatic;

    dialog->priv->update_tag = TRUE;

    embed = ephy_embed_dialog_get_embed (EPHY_EMBED_DIALOG (dialog));
    g_return_if_fail (EPHY_IS_EMBED (embed));

    info = ephy_embed_get_encoding_info (embed);
    if (info == NULL) return;

    node = ephy_encodings_get_node (dialog->priv->encodings, info->encoding);
    g_return_if_fail (EPHY_IS_NODE (node));

    /* select the current encoding in the list view */
    ephy_node_view_select_node (EPHY_NODE_VIEW (dialog->priv->enc_view),
                    node);

    /* scroll the view so the active encoding is visible */
        selection = gtk_tree_view_get_selection
                (GTK_TREE_VIEW (dialog->priv->enc_view));
    model = gtk_tree_view_get_model (GTK_TREE_VIEW (dialog->priv->enc_view));
        rows = gtk_tree_selection_get_selected_rows (selection, &model);
        if (rows != NULL)
    {
        gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (dialog->priv->enc_view),
                          (GtkTreePath *) rows->data,
                          NULL, /* column */
                          TRUE,
                          0.5,
                          0.0);
        g_list_foreach (rows, (GFunc)gtk_tree_path_free, NULL);
        g_list_free (rows);
    }

    is_automatic = encoding_is_automatic (info);

    button = ephy_dialog_get_control (EPHY_DIALOG (dialog), properties[AUTOMATIC_PROP].id);
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), is_automatic);

    ephy_encoding_info_free (info);

    dialog->priv->update_tag = FALSE;
}

static void
sync_active_tab (EphyWindow *window, GParamSpec *pspec, EphyEncodingDialog *dialog)
{
    EphyEmbed *embed;

    embed = ephy_window_get_active_embed (dialog->priv->window);

    g_object_set (G_OBJECT (dialog), "embed", embed, NULL);
}

static void
sync_parent_window_cb (EphyEncodingDialog *dialog, GParamSpec *pspec, gpointer dummy)
{
    EphyWindow *window;
    GValue value = { 0, };

    g_return_if_fail (dialog->priv->window == NULL);

    g_value_init (&value, GTK_TYPE_WIDGET);
    g_object_get_property (G_OBJECT (dialog), "parent-window", &value);
    window = EPHY_WINDOW (g_value_get_object (&value));
    g_value_unset (&value);

    g_return_if_fail (EPHY_IS_WINDOW (window));

    dialog->priv->window = window;

    sync_active_tab (window, NULL, dialog);
    g_signal_connect (G_OBJECT (window), "notify::active-tab",
              G_CALLBACK (sync_active_tab), dialog);
}

static void
activate_choice (EphyEncodingDialog *dialog)
{
    EphyEmbed *embed;
    EphyEncodingInfo *info;
    GtkWidget *button;
    gboolean is_automatic;

    embed = ephy_embed_dialog_get_embed (EPHY_EMBED_DIALOG (dialog));
    g_return_if_fail (EPHY_IS_EMBED (embed));

    info = ephy_embed_get_encoding_info (embed);
    if (info == NULL) return;

    button = ephy_dialog_get_control (EPHY_DIALOG (dialog), properties[AUTOMATIC_PROP].id);
    is_automatic = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button));

    if (is_automatic)
    {
        /* only unset if it was forced before */
        if ((info->forced_encoding != NULL && info->forced_encoding[0] != '\0')
            || info->encoding_source >= EMBED_ENCODING_PARENT_FORCED)
        {
            ephy_embed_set_encoding (embed, "");
        }
    }
    else if (dialog->priv->selected_node != NULL)
    {
        const char *code;

        code = ephy_node_get_property_string (dialog->priv->selected_node,
                              EPHY_NODE_ENCODING_PROP_ENCODING);

        /* only force it if it's different from active */
        if (info->encoding && strcmp (info->encoding, code) != 0)
        {
            ephy_embed_set_encoding (embed, code);

            ephy_encodings_add_recent (dialog->priv->encodings, code);
        }
    }

    ephy_encoding_info_free (info);
}

void
ephy_encoding_dialog_response_cb (GtkWidget *widget,
                  gint response,
                  EphyEncodingDialog *dialog)
{
    g_object_unref (dialog);
}

static void
view_node_selected_cb (EphyNodeView *view,
               EphyNode *node,
               EphyEncodingDialog *dialog)
{
    GtkWidget *button;

    dialog->priv->selected_node = node;

    if (dialog->priv->update_tag) return;

    button = ephy_dialog_get_control (EPHY_DIALOG (dialog), properties[MANUAL_PROP].id);
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);

    activate_choice (dialog);
}

static void
view_node_activated_cb (GtkWidget *view,
            EphyNode *node,
            EphyEncodingDialog *dialog)
{
    GtkWidget *button;

    dialog->priv->selected_node = node;

    if (dialog->priv->update_tag) return;

    button = ephy_dialog_get_control (EPHY_DIALOG (dialog), properties[MANUAL_PROP].id);
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);

    activate_choice (dialog);

    g_object_unref (dialog);
}

static void
automatic_toggled_cb (GtkToggleButton *button, EphyEncodingDialog *dialog)
{
    if (gtk_toggle_button_get_active (button)
        && dialog->priv->update_tag == FALSE)
    {
        activate_choice (dialog);
    }
}

static void
ephy_encoding_dialog_init (EphyEncodingDialog *dialog)
{
    GtkWidget *treeview, *scroller, *button;
    GtkTreeSelection *selection;
    EphyNode *node;

    dialog->priv = EPHY_ENCODING_DIALOG_GET_PRIVATE (dialog);

    dialog->priv->encodings =
        EPHY_ENCODINGS (ephy_embed_shell_get_encodings
                (EPHY_EMBED_SHELL (ephy_shell)));

    dialog->priv->update_tag = FALSE;
    dialog->priv->selected_node = NULL;

    ephy_dialog_construct (EPHY_DIALOG (dialog),
                   properties,
                   "epiphany.glade",
                   "encoding_dialog");

    dialog->priv->filter = ephy_node_filter_new ();

    node = ephy_encodings_get_all (dialog->priv->encodings);
    treeview = ephy_node_view_new (node, dialog->priv->filter);

    ephy_node_view_add_column (EPHY_NODE_VIEW (treeview), _("Encodings"),
                   G_TYPE_STRING,
                   EPHY_NODE_ENCODING_PROP_TITLE_ELIDED,
                   -1,
                   EPHY_NODE_VIEW_AUTO_SORT |
                   EPHY_NODE_VIEW_SEARCHABLE,
                   NULL);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview));
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_BROWSE);
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(treeview), FALSE);

    g_signal_connect (G_OBJECT (treeview),
              "node_selected",
              G_CALLBACK (view_node_selected_cb),
              dialog);
    g_signal_connect (G_OBJECT (treeview),
              "node_activated",
              G_CALLBACK (view_node_activated_cb),
              dialog);

    gtk_widget_show (treeview);

    scroller = ephy_dialog_get_control
            (EPHY_DIALOG (dialog), properties[SCROLLED_WINDOW_PROP].id);
    gtk_container_add (GTK_CONTAINER (scroller), treeview);

    button = ephy_dialog_get_control (EPHY_DIALOG (dialog), properties[AUTOMATIC_PROP].id);
    gtk_label_set_use_markup (GTK_LABEL (GTK_BIN (button)->child), TRUE);
    g_signal_connect (button, "toggled",
              G_CALLBACK (automatic_toggled_cb), dialog);

    button = ephy_dialog_get_control (EPHY_DIALOG (dialog), properties[MANUAL_PROP].id);
    gtk_label_set_use_markup (GTK_LABEL (GTK_BIN (button)->child), TRUE);

    dialog->priv->enc_view = treeview;

    g_signal_connect (G_OBJECT (dialog), "notify::parent-window",
              G_CALLBACK (sync_parent_window_cb), NULL);
    g_signal_connect (G_OBJECT (dialog), "notify::embed",
              G_CALLBACK (sync_embed_cb), NULL);
}

static void
ephy_encoding_dialog_finalize (GObject *object)
{
    EphyEncodingDialog *dialog = EPHY_ENCODING_DIALOG (object);

    if (dialog->priv->window != NULL)
    {
        g_signal_handlers_disconnect_by_func (dialog->priv->window,
                              G_CALLBACK (sync_active_tab),
                              dialog);
    }

    g_object_unref (dialog->priv->filter);

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

static void
ephy_encoding_dialog_class_init (EphyEncodingDialogClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    object_class->finalize = ephy_encoding_dialog_finalize;

    g_type_class_add_private (object_class, sizeof(EphyEncodingDialogPrivate));
}
        
EphyEncodingDialog *
ephy_encoding_dialog_new (EphyWindow *parent)
{
    return g_object_new (EPHY_TYPE_ENCODING_DIALOG,
                 "parent-window", parent,
                 NULL);
}