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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-shell-shared-folder-picker-dialog.c - Implementation for the shared folder
 * picker dialog.
 *
 * Copyright (C) 2002 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 <ettore@ximian.com>
 */

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

#include "e-shell-shared-folder-picker-dialog.h"

#include "e-corba-storage.h"
#include "e-shell-constants.h"
#include "evolution-storage-listener.h"

#include "Evolution-Addressbook-SelectNames.h"

#include <gal/widgets/e-gui-utils.h>
#include <gal/widgets/e-unicode.h>

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

#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-listener.h>
#include <bonobo/bonobo-widget.h>

#include <bonobo-activation/bonobo-activation.h>

#include <gtk/gtk.h>
#include <gtk/gtksignal.h>


/* Timeout for showing the progress dialog (msecs).  */

#define PROGRESS_DIALOG_DELAY 500


/* Dialog creation and handling.  */

static void
setup_folder_name_combo (GladeXML *glade_xml)
{
    GtkWidget *combo;
    GList *string_list;
    char *strings[] = {
        "Calendar",
        "Inbox",
        "Contacts",
        NULL
        /* FIXME: Should these be translated?  */
    };
    int i;

    combo = glade_xml_get_widget (glade_xml, "folder-name-combo");
    g_assert (GTK_IS_COMBO (combo));

    string_list = NULL;
    for (i = 0; strings[i] != NULL; i ++)
        string_list = g_list_append (string_list, strings[i]);
    gtk_combo_set_popdown_strings (GTK_COMBO (combo), string_list);
    g_list_free (string_list);

    gtk_entry_set_text (GTK_ENTRY (GTK_COMBO (combo)->entry), "Calendar");
}

static void
user_clicked (GtkWidget *button, GNOME_Evolution_Addressbook_SelectNames corba_iface)
{
    CORBA_Environment ev;
    
    CORBA_exception_init (&ev);
    GNOME_Evolution_Addressbook_SelectNames_activateDialog (corba_iface, "User", &ev);

    if (BONOBO_EX (&ev))
        g_warning ("Cannot activate SelectNames dialog -- %s", BONOBO_EX_REPOID (&ev));

    CORBA_exception_free (&ev);
}

static GtkWidget *
setup_name_selector (GladeXML *glade_xml)
{
    GNOME_Evolution_Addressbook_SelectNames corba_iface;
    Bonobo_Control control;
    CORBA_Environment ev;
    GtkWidget *placeholder;
    GtkWidget *control_widget;
    GtkWidget *button;

    placeholder = glade_xml_get_widget (glade_xml, "user-picker-placeholder");
    g_assert (GTK_IS_CONTAINER (placeholder));

    CORBA_exception_init (&ev);

    corba_iface = bonobo_activation_activate_from_id ("OAFIID:GNOME_Evolution_Addressbook_SelectNames",
                              0, NULL, &ev);
    if (corba_iface == CORBA_OBJECT_NIL || BONOBO_EX (&ev)) {
        g_warning ("Cannot activate SelectNames -- %s", BONOBO_EX_REPOID (&ev));
        CORBA_exception_free (&ev);
        return CORBA_OBJECT_NIL;
    }

    GNOME_Evolution_Addressbook_SelectNames_addSectionWithLimit (corba_iface, "User", "User", 1, &ev);
    if (BONOBO_EX (&ev)) {
        g_warning ("Cannot add SelectNames section -- %s", BONOBO_EX_REPOID (&ev));
        goto err;
    }

    control = GNOME_Evolution_Addressbook_SelectNames_getEntryBySection (corba_iface, "User", &ev);
    if (BONOBO_EX (&ev)) {
        g_warning ("Cannot get SelectNames section -- %s", BONOBO_EX_REPOID (&ev));
        goto err;
    }

    control_widget = bonobo_widget_new_control_from_objref (control, CORBA_OBJECT_NIL);
    gtk_container_add (GTK_CONTAINER (placeholder), control_widget);
    gtk_widget_show (control_widget);

    button = glade_xml_get_widget (glade_xml, "button-user");
    g_signal_connect (button, "clicked", G_CALLBACK (user_clicked), corba_iface);

    CORBA_exception_free (&ev);
    return control_widget;

 err:
    Bonobo_Unknown_unref (corba_iface, &ev);
    CORBA_exception_free (&ev);
    return NULL;
}

static void
server_option_menu_item_activate_callback (GtkMenuItem *menu_item,
                       void *data)
{
    char **storage_name_return;

    storage_name_return = (char **) data;
    if (*storage_name_return != NULL)
        g_free (*storage_name_return);

    *storage_name_return = g_strdup ((const char *) gtk_object_get_data (GTK_OBJECT (menu_item),
                                         "storage_name"));
}

static void
setup_server_option_menu (EShell *shell,
              GladeXML *glade_xml,
              char **storage_name_return)
{
    GList *storages;
    GList *p;
    GtkWidget *widget;
    GtkWidget *menu;

    widget = glade_xml_get_widget (glade_xml, "server-option-menu");
    g_assert (GTK_IS_OPTION_MENU (widget));

    menu = gtk_menu_new ();
    gtk_widget_show (menu);

    *storage_name_return = NULL;
    storages = e_storage_set_get_storage_list (e_shell_get_storage_set (shell));
    for (p = storages; p != NULL; p = p->next) {
        GtkWidget *menu_item;
        const char *storage_name;

        if (!e_storage_supports_shared_folders (p->data))
            continue;

        storage_name = e_storage_get_name (E_STORAGE (p->data));

        menu_item = e_utf8_gtk_menu_item_new_with_label (GTK_MENU (menu), storage_name);
        g_signal_connect (menu_item, "activate",
                  G_CALLBACK (server_option_menu_item_activate_callback),
                  storage_name_return);
        g_object_set_data_full (G_OBJECT (menu_item), "storage_name", g_strdup (storage_name), g_free);

        gtk_widget_show (menu_item);
        gtk_menu_append (GTK_MENU (menu), menu_item);

        if (*storage_name_return == NULL)
            *storage_name_return = g_strdup (storage_name);
    }

    gtk_option_menu_set_menu (GTK_OPTION_MENU (widget), menu);

    /* FIXME: Default to the current storage in the shell view.  */
}

static gboolean
show_dialog (EShell *shell,
         EShellView *parent,
         char **user_email_address_return,
         char **storage_name_return,
         char **folder_name_return)
{
    GladeXML *glade_xml;
    GtkWidget *dialog;
    GtkWidget *name_selector_widget;
    GtkWidget *folder_name_entry;
    int button_num;

    glade_xml = glade_xml_new (EVOLUTION_GLADEDIR "/e-shell-shared-folder-picker-dialog.glade",
                   NULL, NULL);
    g_assert (glade_xml != NULL);

    name_selector_widget = setup_name_selector (glade_xml);
    if (name_selector_widget == NULL)
        return FALSE;

    setup_server_option_menu (shell, glade_xml, storage_name_return);
    setup_folder_name_combo (glade_xml);

    dialog = glade_xml_get_widget (glade_xml, "dialog");
    g_assert (dialog != NULL);

    gnome_dialog_close_hides (GNOME_DIALOG (dialog), TRUE);

    button_num = gnome_dialog_run_and_close (GNOME_DIALOG (dialog));
    if (button_num == 1) {  /* Cancel */
        g_free (*storage_name_return);
        *storage_name_return = NULL;
        gtk_widget_destroy (dialog);
        return FALSE;
    }

    bonobo_widget_get_property (BONOBO_WIDGET (name_selector_widget),
                    "addresses", user_email_address_return,
                    NULL);

    folder_name_entry = glade_xml_get_widget (glade_xml, "folder-name-entry");
    *folder_name_return = g_strdup (gtk_entry_get_text (GTK_ENTRY (folder_name_entry)));

    gtk_widget_destroy (dialog);
    return TRUE;
}


/* Discovery process.  */

struct _DiscoveryData {
    EShell *shell;
    EShellView *parent;
    GtkWidget *dialog;
    char *user_email_address;
    char *folder_name;
    EStorage *storage;
};
typedef struct _DiscoveryData DiscoveryData;

static void
cleanup_discovery (DiscoveryData *discovery_data)
{
    if (discovery_data->dialog != NULL)
        gtk_widget_destroy (discovery_data->dialog);

    g_free (discovery_data->user_email_address);
    g_free (discovery_data->folder_name);
    g_object_unref (discovery_data->storage);
    g_free (discovery_data);
}

static int
progress_bar_timeout_callback (void *data)
{
    GtkAdjustment *adjustment;
    float value;

    adjustment = GTK_PROGRESS (data)->adjustment;
    value = adjustment->value + 1;
    if (value > adjustment->upper)
        value = adjustment->lower;

    gtk_progress_set_value (GTK_PROGRESS (data), value);

    return TRUE;
}

static void
progress_bar_destroy_callback (GtkObject *object,
                   void *data)
{
    int timeout_id;

    timeout_id = GPOINTER_TO_INT (data);
    g_source_remove (timeout_id);
}

static int
progress_dialog_close_callback (GnomeDialog *dialog,
                void *data)
{
    /* Don't allow the dialog to be closed through the window manager close
       command.  */
    return TRUE;
}

/* This is invoked if the "Cancel" button is clicked.  */
static void
progress_dialog_clicked_callback (GnomeDialog *dialog,
                  int button_number,
                  void *data)
{
    DiscoveryData *discovery_data;

    discovery_data = (DiscoveryData *) data;

    e_storage_cancel_discover_shared_folder (discovery_data->storage,
                         discovery_data->user_email_address,
                         discovery_data->folder_name);

    cleanup_discovery (discovery_data);
}

static int
progress_dialog_show_timeout_callback (void *data)
{
    GtkWidget *dialog;

    dialog = GTK_WIDGET (data);
    gtk_widget_show_all (dialog);
    return FALSE;
}

static GtkWidget *
create_progress_dialog (EShell *shell,
            EStorage *storage,
            const char *user_email_address,
            const char *folder_name)
{
    GtkWidget *dialog;
    GtkWidget *label;
    GtkWidget *progress_bar;
    int timeout_id;
    char *text;

    dialog = gnome_dialog_new (_("Opening Folder"), GNOME_STOCK_BUTTON_CANCEL, NULL);
    gtk_widget_set_usize (dialog, 300, -1);
    gtk_window_set_policy (GTK_WINDOW (dialog), FALSE, FALSE, FALSE);

    g_signal_connect (dialog, "close",
              G_CALLBACK (progress_dialog_close_callback), NULL);

    text = g_strdup_printf (_("Opening Folder \"%s\""), folder_name);
    label = gtk_label_new (text);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), label, FALSE, TRUE, 0);
    g_free (text);

    text = g_strdup_printf (_("in \"%s\" ..."), e_storage_get_name (storage));
    label = gtk_label_new (text);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), label, FALSE, TRUE, 0);
    g_free (text);

    progress_bar = gtk_progress_bar_new ();
    gtk_progress_set_activity_mode (GTK_PROGRESS (progress_bar), TRUE);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), progress_bar, FALSE, TRUE, 0);

    timeout_id = g_timeout_add (50, progress_bar_timeout_callback, progress_bar);
    g_signal_connect (progress_bar, "destroy",
              G_CALLBACK (progress_bar_destroy_callback),
              GINT_TO_POINTER (timeout_id));

    timeout_id = g_timeout_add (PROGRESS_DIALOG_DELAY, progress_dialog_show_timeout_callback, dialog);
    g_signal_connect (progress_bar, "destroy",
              G_CALLBACK (progress_bar_destroy_callback),
              GINT_TO_POINTER (timeout_id));

    return dialog;
}

static void
shell_destroy_callback (GtkObject *object,
            void *data)
{
    DiscoveryData *discovery_data;

    discovery_data = (DiscoveryData *) data;
    cleanup_discovery (discovery_data);
}

static void
shell_view_destroy_callback (GtkObject *object,
                 void *data)
{
    DiscoveryData *discovery_data;

    discovery_data = (DiscoveryData *) data;
    discovery_data->parent = NULL;
}

static void
storage_destroy_callback (GtkObject *object,
              void *data)
{
    DiscoveryData *discovery_data;

    discovery_data = (DiscoveryData *) data;
    cleanup_discovery (discovery_data);

    /* FIXME: Should we signal the user when this happens?  I.e. when the
       storage dies for some reason before the folder is discovered.  */
}

static void
shared_folder_discovery_callback (EStorage *storage,
                  EStorageResult result,
                  const char *path,
                  void *data)
{
    DiscoveryData *discovery_data;
    EShell *shell;
    EShellView *parent;

    discovery_data = (DiscoveryData *) data;
    shell = discovery_data->shell;
    parent = discovery_data->parent;

    /* Make sure the progress dialog doesn't show up now. */
    cleanup_discovery (discovery_data);

    if (result == E_STORAGE_OK) {
        char *uri;

        uri = g_strconcat (E_SHELL_URI_PREFIX, "/",
                   e_storage_get_name (storage),
                   path, NULL);

        if (discovery_data->parent != NULL)
            e_shell_view_display_uri (parent, uri, TRUE);
        else
            e_shell_create_view (shell, uri, NULL);
    } else {
        e_notice (parent ? GTK_WINDOW (parent) : NULL,
              GNOME_MESSAGE_BOX_ERROR,
              _("Could not open shared folder: %s."),
              e_storage_result_to_string (result));
    }
}

static void
discover_folder (EShell *shell,
         EShellView *parent,
         const char *user_email_address,
         const char *storage_name,
         const char *folder_name)
{
    EStorageSet *storage_set;
    EStorage *storage;
    GtkWidget *dialog;
    DiscoveryData *discovery_data;

    storage_set = e_shell_get_storage_set (shell);
    if (storage_set == NULL)
        goto error;

    storage = e_storage_set_get_storage (storage_set, storage_name);
    if (storage == NULL || ! e_storage_supports_shared_folders (storage))
        goto error;

    dialog = create_progress_dialog (shell, storage, user_email_address, folder_name);

    discovery_data = g_new (DiscoveryData, 1);
    discovery_data->dialog             = dialog;
    discovery_data->shell              = shell;
    discovery_data->parent             = parent;
    discovery_data->user_email_address = g_strdup (user_email_address);
    discovery_data->folder_name        = g_strdup (folder_name);
    discovery_data->storage            = storage;
    g_object_ref (storage);

    g_signal_connect (shell, "destroy",
              G_CALLBACK (shell_destroy_callback), discovery_data);

    g_signal_connect (parent, "destroy",
              G_CALLBACK (shell_view_destroy_callback), discovery_data);

    g_signal_connect (storage, "destroy",
              G_CALLBACK (storage_destroy_callback), discovery_data);

    g_signal_connect (dialog, "clicked",
              G_CALLBACK (progress_dialog_clicked_callback), discovery_data);

    e_storage_async_discover_shared_folder (storage,
                        user_email_address,
                        folder_name,
                        shared_folder_discovery_callback,
                        discovery_data);
    return;

 error:
    /* FIXME: Be more verbose?  */
    e_notice (GTK_WINDOW (parent), GNOME_MESSAGE_BOX_ERROR,
          _("Cannot find the specified shared folder."));
}


void
e_shell_show_shared_folder_picker_dialog (EShell *shell,
                      EShellView *parent)
{
    char *user_email_address;
    char *storage_name;
    char *folder_name;

    g_return_if_fail (E_IS_SHELL (shell));

    if (! show_dialog (shell, parent, &user_email_address, &storage_name, &folder_name))
        return;

    discover_folder (shell, parent, user_email_address, storage_name, folder_name);

    g_free (user_email_address);
    g_free (storage_name);
    g_free (folder_name);
}