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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-shortcuts-view-model.c
 *
 * Copyright (C) 2000  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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.
 *
 * Author: Ettore Perazzoli
 */

/* FIXME.  This really sucks.  We are using the model/view approach in the
   dumbest possible way.  */

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

#include "e-shortcuts-view-model.h"

#include "e-icon-factory.h"

#include <glib.h>
#include <gtk/gtksignal.h>
#include <libgnome/gnome-i18n.h>

#include <gal/util/e-util.h>


#define PARENT_TYPE e_shortcut_model_get_type ()
static EShortcutModelClass *parent_class = NULL;

struct _EShortcutsViewModelPrivate {
    EShortcuts *shortcuts;
};


/* Utility functions.  */

static GdkPixbuf *
get_icon_for_item (EShortcutsViewModel *shortcuts_view_model,
           const EShortcutItem *item,
           gboolean want_mini)
{
    EShortcutsViewModelPrivate *priv;

    priv = shortcuts_view_model->priv;

    if (item->custom_icon_name != NULL)
        return e_icon_factory_get_icon (item->custom_icon_name, want_mini);

    if (item->type != NULL) {
        EStorageSet *storage_set;
        EFolderTypeRegistry *folder_type_registry;

        storage_set = e_shell_get_storage_set (e_shortcuts_get_shell (priv->shortcuts));
        folder_type_registry = e_storage_set_get_folder_type_registry (storage_set);

        return e_folder_type_registry_get_icon_for_type (folder_type_registry,
                                 item->type,
                                 want_mini);
    }

    return NULL;
}


/* View initialization.  */

static char *
get_name_with_unread (const EShortcutItem *item)
{
    if (item->unread_count > 0)
        return g_strdup_printf ("%s (%d)", item->name, item->unread_count);
    else
        return g_strdup (item->name);
}

static void
load_group_into_model (EShortcutsViewModel *shortcuts_view_model,
               int group_num)
{
    EShortcutsViewModelPrivate *priv;
    const GSList *shortcut_list;
    const GSList *p;

    priv = shortcuts_view_model->priv;

    shortcut_list = e_shortcuts_get_shortcuts_in_group (priv->shortcuts, group_num);
    if (shortcut_list == NULL)
        return;

    for (p = shortcut_list; p != NULL; p = p->next) {
        const EShortcutItem *item;
        char *name_with_unread;

        item = (const EShortcutItem *) p->data;
        name_with_unread = get_name_with_unread (item);

        e_shortcut_model_add_item (E_SHORTCUT_MODEL (shortcuts_view_model),
                       group_num, -1,
                       item->uri,
                       name_with_unread,
                       get_icon_for_item (shortcuts_view_model, item, FALSE));

        g_free (name_with_unread);
    }
}

static void
load_all_shortcuts_into_model (EShortcutsViewModel *shortcuts_view_model)
{
    EShortcutsViewModelPrivate *priv;
    const GSList *group_titles;
    const GSList *p;
    int group_num;

    priv = shortcuts_view_model->priv;

    group_titles = e_shortcuts_get_group_titles (priv->shortcuts);

    for (p = group_titles; p != NULL; p = p->next) {
        const char *group_title;

        group_title = (const char *) p->data;
        group_num = e_shortcut_model_add_group (E_SHORTCUT_MODEL (shortcuts_view_model), -1, group_title);

        load_group_into_model (shortcuts_view_model, group_num);
    }
}


/* EShortcuts callbacks.  */

static void
shortcuts_new_group_cb (EShortcuts *shortcuts,
            int group_num,
            void *data)
{
    EShortcutsViewModel *shortcuts_view_model;
    EShortcutsViewModelPrivate *priv;
    const char *title;

    shortcuts_view_model = E_SHORTCUTS_VIEW_MODEL (data);
    priv = shortcuts_view_model->priv;

    title = e_shortcuts_get_group_title (priv->shortcuts, group_num);
    e_shortcut_model_add_group (E_SHORTCUT_MODEL (shortcuts_view_model), group_num, title);
}

static void
shortcuts_remove_group_cb (EShortcuts *shortcuts,
               int group_num,
               void *data)
{
    EShortcutsViewModel *shortcuts_view_model;

    shortcuts_view_model = E_SHORTCUTS_VIEW_MODEL (data);
    e_shortcut_model_remove_group (E_SHORTCUT_MODEL (shortcuts_view_model), group_num);
}

static void
shortcuts_rename_group_cb (EShortcuts *shortcuts,
               int group_num,
               const char *new_title,
               void *data)
{
    EShortcutsViewModel *shortcuts_view_model;

    shortcuts_view_model = E_SHORTCUTS_VIEW_MODEL (data);

    /* FIXME: Ideally there should be an
           e_shortcut_model_rename_group(), removing then re-add
           actually causes a flip to the next group, which we work
           around in e-shortcuts-view.c */
    e_shortcut_model_remove_group (E_SHORTCUT_MODEL (shortcuts_view_model), group_num);
    e_shortcut_model_add_group (E_SHORTCUT_MODEL (shortcuts_view_model), group_num, new_title);
    load_group_into_model (shortcuts_view_model, group_num);
}

static void
shortcuts_new_shortcut_cb (EShortcuts *shortcuts,
               int group_num,
               int item_num,
               void *data)
{
    EShortcutsViewModel *shortcuts_view_model;
    EShortcutsViewModelPrivate *priv;
    const EShortcutItem *shortcut_item;
    char *name_with_unread;

    shortcuts_view_model = E_SHORTCUTS_VIEW_MODEL (data);
    priv = shortcuts_view_model->priv;

    shortcut_item = e_shortcuts_get_shortcut (priv->shortcuts, group_num, item_num);
    g_assert (shortcut_item != NULL);

    name_with_unread = get_name_with_unread (shortcut_item);
    e_shortcut_model_add_item (E_SHORTCUT_MODEL (shortcuts_view_model),
                   group_num, item_num,
                   shortcut_item->uri,
                   name_with_unread,
                   get_icon_for_item (shortcuts_view_model, shortcut_item, FALSE));

    g_free (name_with_unread);
}

static void
shortcuts_remove_shortcut_cb (EShortcuts *shortcuts,
                  int group_num,
                  int item_num,
                  void *data)
{
    EShortcutsViewModel *shortcuts_view_model;

    shortcuts_view_model = E_SHORTCUTS_VIEW_MODEL (data);
    e_shortcut_model_remove_item (E_SHORTCUT_MODEL (shortcuts_view_model), group_num, item_num);
}

static void
shortcuts_update_shortcut_cb (EShortcuts *shortcuts,
                  int group_num,
                  int item_num,
                  void *data)
{
    EShortcutsViewModel *shortcuts_view_model;
    EShortcutsViewModelPrivate *priv;
    const EShortcutItem *shortcut_item;
    char *name_with_unread;

    shortcuts_view_model = E_SHORTCUTS_VIEW_MODEL (data);
    priv = shortcuts_view_model->priv;

    shortcut_item = e_shortcuts_get_shortcut (priv->shortcuts, group_num, item_num);
    g_assert (shortcut_item != NULL);

    name_with_unread = get_name_with_unread (shortcut_item);
    e_shortcut_model_update_item (E_SHORTCUT_MODEL (shortcuts_view_model),
                      group_num, item_num,
                      shortcut_item->uri,
                      name_with_unread,
                      get_icon_for_item (shortcuts_view_model, shortcut_item, FALSE));

    g_free (name_with_unread);
}


/* GtkObject methods.  */

static void
impl_destroy (GtkObject *object)
{
    EShortcutsViewModel *view_model;
    EShortcutsViewModelPrivate *priv;

    view_model = E_SHORTCUTS_VIEW_MODEL (object);
    priv = view_model->priv;

    g_free (priv);

    if (GTK_OBJECT_CLASS (parent_class)->destroy)
        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


static void
class_init (EShortcutsViewModelClass *klass)
{
    GtkObjectClass *object_class;

    object_class = GTK_OBJECT_CLASS (klass);
    object_class->destroy = impl_destroy;

    parent_class = gtk_type_class (e_shortcut_model_get_type ());
}

static void
init (EShortcutsViewModel *shortcuts_view_model)
{
    EShortcutsViewModelPrivate *priv;

    priv = g_new (EShortcutsViewModelPrivate, 1);
    priv->shortcuts      = NULL;

    shortcuts_view_model->priv = priv;
}


void
e_shortcuts_view_model_construct (EShortcutsViewModel *model,
                  EShortcuts *shortcuts)
{
    EShortcutsViewModelPrivate *priv;

    g_return_if_fail (model != NULL);
    g_return_if_fail (E_IS_SHORTCUTS_VIEW_MODEL (model));
    g_return_if_fail (shortcuts != NULL);
    g_return_if_fail (E_IS_SHORTCUTS (shortcuts));

    priv = model->priv;
    g_return_if_fail (priv->shortcuts == NULL);

    priv->shortcuts = shortcuts;

    load_all_shortcuts_into_model (model);

    g_signal_connect_object (priv->shortcuts, "new_group", G_CALLBACK (shortcuts_new_group_cb), model, 0);
    g_signal_connect_object (priv->shortcuts, "remove_group", G_CALLBACK (shortcuts_remove_group_cb), model, 0);
    g_signal_connect_object (priv->shortcuts, "rename_group", G_CALLBACK (shortcuts_rename_group_cb), model, 0);
    g_signal_connect_object (priv->shortcuts, "new_shortcut", G_CALLBACK (shortcuts_new_shortcut_cb), model, 0);
    g_signal_connect_object (priv->shortcuts, "remove_shortcut", G_CALLBACK (shortcuts_remove_shortcut_cb), model, 0);
    g_signal_connect_object (priv->shortcuts, "update_shortcut", G_CALLBACK (shortcuts_update_shortcut_cb), model, 0);
}

EShortcutsViewModel *
e_shortcuts_view_model_new (EShortcuts *shortcuts)
{
    EShortcutsViewModel *new;

    g_return_val_if_fail (shortcuts != NULL, NULL);
    g_return_val_if_fail (E_IS_SHORTCUTS (shortcuts), NULL);

    new = g_object_new (e_shortcuts_view_model_get_type (), NULL);

    e_shortcuts_view_model_construct (new, shortcuts);

    return new;
}


E_MAKE_TYPE (e_shortcuts_view_model, "EShortcutsViewModel", EShortcutsViewModel, class_init, init, PARENT_TYPE)