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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-shell-folder-selection-dialog.c
 *
 * Copyright (C) 2000  Helix Code, Inc.
 *
 * 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 of the
 * License, 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.
 *
 * Author: Ettore Perazzoli
 */

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

#include <libgnomeui/gnome-stock.h>
#include <libgnomeui/gnome-dialog.h>
#include <libgnome/gnome-i18n.h>

#include "e-util/e-gui-utils.h"
#include "e-util/e-util.h"
#include "widgets/misc/e-scroll-frame.h"

#include "e-shell-constants.h"
#include "e-storage-set-view.h"
#include "e-storage-set.h"

#include "e-shell-folder-creation-dialog.h"

#include "e-shell-folder-selection-dialog.h"


#define PARENT_TYPE (gnome_dialog_get_type ())
static GnomeDialogClass *parent_class = NULL;

struct _EShellFolderSelectionDialogPrivate {
    EShell *shell;
    GList *allowed_types;
    EStorageSet *storage_set;
    GtkWidget *storage_set_view;
};

enum {
    FOLDER_SELECTED,
    CANCELLED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };


static gboolean
check_folder_type (EShellFolderSelectionDialog *folder_selection_dialog)
{
    EShellFolderSelectionDialogPrivate *priv;
    const char *selected_path;
    EFolder *folder;
    const char *folder_type;
    GList *p;

    priv = folder_selection_dialog->priv;
    if (priv->allowed_types == NULL)
        return TRUE;

    selected_path = e_shell_folder_selection_dialog_get_selected_path (folder_selection_dialog);
    if (selected_path == NULL)
        return FALSE;

    folder = e_storage_set_get_folder (priv->storage_set, selected_path);
    if (folder == NULL)
        return FALSE;

    folder_type = e_folder_get_type_string (folder);

    for (p = priv->allowed_types; p != NULL; p = p->next) {
        const char *type;

        type = (const char *) p->data;
        if (strcasecmp (folder_type, type) == 0)
            return TRUE;
    }

    e_notice (GTK_WINDOW (folder_selection_dialog), GNOME_MESSAGE_BOX_ERROR,
          _("The type of the selected folder is not valid for\nthe requested operation."));

    return FALSE;
}


/* GtkObject methods.  */

static void
impl_destroy (GtkObject *object)
{
    EShellFolderSelectionDialog *folder_selection_dialog;
    EShellFolderSelectionDialogPrivate *priv;

    folder_selection_dialog = E_SHELL_FOLDER_SELECTION_DIALOG (object);
    priv = folder_selection_dialog->priv;

    if (priv->storage_set != NULL)
        gtk_object_unref (GTK_OBJECT (priv->storage_set));

    e_free_string_list (priv->allowed_types);

    g_free (priv);

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


/* GnomeDialog methods.  */

static void
impl_clicked (GnomeDialog *dialog,
          int button_number)
{
    EShellFolderSelectionDialog *folder_selection_dialog;
    EShellFolderSelectionDialogPrivate *priv;
    EStorageSetView *storage_set_view;
    const char *default_parent_folder;

    folder_selection_dialog = E_SHELL_FOLDER_SELECTION_DIALOG (dialog);
    priv = folder_selection_dialog->priv;

    switch (button_number) {
    case 0:         /* OK */
        if (check_folder_type (folder_selection_dialog)) {
            gtk_signal_emit (GTK_OBJECT (folder_selection_dialog), signals[FOLDER_SELECTED],
                     e_shell_folder_selection_dialog_get_selected_path (folder_selection_dialog));
            gtk_widget_destroy (GTK_WIDGET (dialog));
        }
        break;
    case 1:         /* Cancel */
        gtk_signal_emit (GTK_OBJECT (folder_selection_dialog), signals[CANCELLED]);
        gtk_widget_destroy (GTK_WIDGET (dialog));
        break;
    case 2:         /* Add */
        storage_set_view = E_STORAGE_SET_VIEW (priv->storage_set_view);
        default_parent_folder = e_storage_set_view_get_current_folder (storage_set_view);

        e_shell_show_folder_creation_dialog (priv->shell, GTK_WINDOW (dialog),
                             default_parent_folder);

        break;
    }
}


/* GTK+ type initialization.  */

static void
class_init (EShellFolderSelectionDialogClass *klass)
{
    GtkObjectClass *object_class;
    GnomeDialogClass *dialog_class;

    parent_class = gtk_type_class (PARENT_TYPE);
    object_class = GTK_OBJECT_CLASS (klass);
    dialog_class = GNOME_DIALOG_CLASS (klass);

    object_class->destroy = impl_destroy;

    dialog_class->clicked = impl_clicked;

    signals[FOLDER_SELECTED]
        = gtk_signal_new ("folder_selected",
                  GTK_RUN_LAST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EShellFolderSelectionDialogClass, folder_selected),
                  gtk_marshal_NONE__POINTER,
                  GTK_TYPE_NONE, 1,
                  GTK_TYPE_STRING);

    signals[CANCELLED]
        = gtk_signal_new ("cancelled",
                  GTK_RUN_LAST,
                  object_class->type,
                  GTK_SIGNAL_OFFSET (EShellFolderSelectionDialogClass, cancelled),
                  gtk_marshal_NONE__NONE,
                  GTK_TYPE_NONE, 0);

    gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
}

static void
init (EShellFolderSelectionDialog *shell_folder_selection_dialog)
{
    EShellFolderSelectionDialogPrivate *priv;

    priv = g_new (EShellFolderSelectionDialogPrivate, 1);
    priv->shell            = NULL;
    priv->storage_set      = NULL;
    priv->storage_set_view = NULL;
    priv->allowed_types    = NULL;

    shell_folder_selection_dialog->priv = priv;
}


static void
set_default_folder (EShellFolderSelectionDialog *shell_folder_selection_dialog,
            const char *default_uri)
{
    EShellFolderSelectionDialogPrivate *priv;
    char *default_path;

    g_assert (default_uri != NULL);

    priv = shell_folder_selection_dialog->priv;

    if (strncmp (default_uri, E_SHELL_URI_PREFIX, E_SHELL_URI_PREFIX_LEN) == 0) {
        /* `evolution:' URI.  */
        default_path = g_strdup (default_uri + E_SHELL_URI_PREFIX_LEN);
    } else {
        /* Physical URI.  */
        default_path = e_storage_set_get_path_for_physical_uri (priv->storage_set,
                                    default_uri);
    }

    e_storage_set_view_set_current_folder (E_STORAGE_SET_VIEW (priv->storage_set_view),
                           default_path);

    g_free (default_path);
}


/**
 * e_shell_folder_selection_dialog_construct:
 * @folder_selection_dialog: A folder selection dialog widget
 * @shell: The this folder selection dialog is for
 * @title: Title of the window
 * @default_uri: The URI of the folder to be selected by default
 * @allowed_types: List of the names of the allowed types
 * 
 * Construct @folder_selection_dialog.
 **/
void
e_shell_folder_selection_dialog_construct (EShellFolderSelectionDialog *folder_selection_dialog,
                       EShell *shell,
                       const char *title,
                       const char *default_uri,
                       const char *allowed_types[])
{
    EShellFolderSelectionDialogPrivate *priv;
    GtkWidget *scroll_frame;
    int i;

    g_return_if_fail (folder_selection_dialog != NULL);
    g_return_if_fail (E_IS_SHELL_FOLDER_SELECTION_DIALOG (folder_selection_dialog));
    g_return_if_fail (shell != NULL);
    g_return_if_fail (E_IS_SHELL (shell));

    priv = folder_selection_dialog->priv;

    gtk_window_set_modal (GTK_WINDOW (folder_selection_dialog), TRUE);
    gtk_window_set_title (GTK_WINDOW (folder_selection_dialog), title);

    gnome_dialog_append_buttons (GNOME_DIALOG (folder_selection_dialog),
                     GNOME_STOCK_BUTTON_OK,
                     GNOME_STOCK_BUTTON_CANCEL,
                     _("New..."),
                     NULL);
    gnome_dialog_set_default (GNOME_DIALOG (folder_selection_dialog), 0);

    gtk_window_set_policy (GTK_WINDOW (folder_selection_dialog), TRUE, TRUE, FALSE);
    gtk_window_set_default_size (GTK_WINDOW (folder_selection_dialog), 350, 300);

    priv->shell = shell;
    gtk_signal_connect_object_while_alive (GTK_OBJECT (shell), "destroy",
                           GTK_SIGNAL_FUNC (gtk_widget_destroy),
                           GTK_OBJECT (folder_selection_dialog));

    priv->storage_set = e_shell_get_storage_set (shell);
    gtk_object_ref (GTK_OBJECT (priv->storage_set));

    priv->storage_set_view = e_storage_set_new_view (priv->storage_set);
    GTK_WIDGET_SET_FLAGS (priv->storage_set_view, GTK_CAN_FOCUS);

    g_assert (priv->allowed_types == NULL);
    if (allowed_types != NULL) {
        for (i = 0; allowed_types[i] != NULL; i++)
            priv->allowed_types = g_list_prepend (priv->allowed_types,
                                  g_strdup (allowed_types[i]));
    }

    if (default_uri != NULL)
        set_default_folder (folder_selection_dialog, default_uri);

    scroll_frame = e_scroll_frame_new (NULL, NULL);
    e_scroll_frame_set_policy (E_SCROLL_FRAME (scroll_frame),
                   GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    gtk_container_add (GTK_CONTAINER (scroll_frame), priv->storage_set_view);

    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (folder_selection_dialog)->vbox),
                scroll_frame, TRUE, TRUE, 2);

    gtk_widget_show (scroll_frame);
    gtk_widget_show (priv->storage_set_view);
}

/**
 * e_shell_folder_selection_dialog_new:
 * @shell: The this folder selection dialog is for
 * @title: Title of the window
 * @default_uri: The URI of the folder to be selected by default
 * @allowed_types: List of the names of the allowed types
 * 
 * Create a new folder selection dialog widget.  @default_uri can be either an
 * `evolution:' URI or a physical URI (all the non-`evoluion:' URIs are
 * considered to be physical URIs).
 * 
 * Return value: 
 **/
GtkWidget *
e_shell_folder_selection_dialog_new (EShell *shell,
                     const char *title,
                     const char *default_uri,
                     const char *allowed_types[])
{
    EShellFolderSelectionDialog *folder_selection_dialog;

    g_return_val_if_fail (shell != NULL, NULL);
    g_return_val_if_fail (E_IS_SHELL (shell), NULL);

    folder_selection_dialog = gtk_type_new (e_shell_folder_selection_dialog_get_type ());
    e_shell_folder_selection_dialog_construct (folder_selection_dialog, shell,
                           title, default_uri, allowed_types);

    return GTK_WIDGET (folder_selection_dialog);
}


const char *
e_shell_folder_selection_dialog_get_selected_path (EShellFolderSelectionDialog *folder_selection_dialog)
{
    EShellFolderSelectionDialogPrivate *priv;

    g_return_val_if_fail (folder_selection_dialog != NULL, NULL);
    g_return_val_if_fail (E_IS_SHELL_FOLDER_SELECTION_DIALOG (folder_selection_dialog), NULL);

    priv = folder_selection_dialog->priv;

    return e_storage_set_view_get_current_folder (E_STORAGE_SET_VIEW (priv->storage_set_view));
}


E_MAKE_TYPE (e_shell_folder_selection_dialog, "EShellFolderSelectionDialog", EShellFolderSelectionDialog,
         class_init, init, PARENT_TYPE)