path: root/shell/e-shell-user-creatable-items-handler.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-shell-user-creatable-items-handler.c
 *
 * Copyright (C) 2001  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-user-creatable-items-handler.h"

#include "e-shell-corba-icon-utils.h"

#include "widgets/misc/e-combo-button.h"

#include "e-util/e-corba-utils.h"

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

#include <bonobo/bonobo-ui-util.h>

#include <libgnome/gnome-i18n.h>

#include <gtk/gtksignal.h>

#include <stdlib.h>
#include <ctype.h>


#define PARENT_TYPE gtk_object_get_type ()
static GtkObjectClass *parent_class = NULL;


#define VERB_PREFIX "ShellUserCreatableItemVerb"

#define SHELL_VIEW_KEY          "EShellUserCreatableItemsHandler:shell_view"
#define COMBO_BUTTON_WIDGET_KEY "EShellUserCreatableItemsHandler:combo_button"

struct _Component {
    EvolutionShellComponentClient *component_client;

    GNOME_Evolution_UserCreatableItemTypeList *type_list;
};
typedef struct _Component Component;

struct _MenuItem {
    const char *label;
    char shortcut;
    char *verb;
    GdkPixbuf *icon;
};
typedef struct _MenuItem MenuItem;

struct _EShellUserCreatableItemsHandlerPrivate { 
    GSList *components; /* Component */

    GSList *menu_items;     /* MenuItem */
    char *menu_xml;
};


/* Component struct handling.  */

static Component *
component_new (const char *id,
           EvolutionShellComponentClient *client)
{
    CORBA_Environment ev;
    Component *new;
    GNOME_Evolution_ShellComponent objref;

    new = g_new (Component, 1);

    new->component_client = client;
    gtk_object_ref (GTK_OBJECT (client));

    CORBA_exception_init (&ev);

    objref = bonobo_object_corba_objref (BONOBO_OBJECT (client));
    new->type_list = GNOME_Evolution_ShellComponent__get_userCreatableItemTypes (objref, &ev);

    if (ev._major != CORBA_NO_EXCEPTION)
        new->type_list = NULL;

    CORBA_exception_free (&ev);

    return new;
}

static void
component_free (Component *component)
{
    gtk_object_unref (GTK_OBJECT (component->component_client));

    if (component->type_list != NULL)
        CORBA_free (component->type_list);

    g_free (component);
}


/* Helper functions.  */

static char *
create_verb_from_component_number_and_type_id (int component_num,
                           const char *type_id)
{
    return g_strdup_printf (VERB_PREFIX ":%d:%s", component_num, type_id);
}


/* Setting up menu items for the "File -> New" submenu and the "New" toolbar
   button.  */

static int
item_types_sort_func (const void *a,
              const void *b)
{
    const MenuItem *item_a;
    const MenuItem *item_b;
    const char *p1, *p2;

    item_a = (const MenuItem *) a;
    item_b = (const MenuItem *) b;

    p1 = item_a->label;
    p2 = item_b->label;

    while (*p1 != '\0' && *p2 != '\0') {
        if (*p1 == '_') {
            p1 ++;
            continue;
        }

        if (*p2 == '_') {
            p2 ++;
            continue;
        }

        if (toupper ((int) *p1) < toupper ((int) *p2))
            return -1;
        else if (toupper ((int) *p1) > toupper ((int) *p2))
            return +1;

        p1 ++, p2 ++;
    }

    if (*p1 == '\0') {
        if (*p2 == '\0')
            return 0;
        else
            return -1;
    } else {
        return +1;
    }
}

static void
ensure_menu_items (EShellUserCreatableItemsHandler *handler)
{
    EShellUserCreatableItemsHandlerPrivate *priv;
    GSList *menu_items;
    GSList *p;
    int component_num;

    priv = handler->priv;
    if (priv->menu_items != NULL)
        return;

    menu_items = NULL;
    component_num = 0;
    for (p = priv->components; p != NULL; p = p->next) {
        const Component *component;
        int i;

        component = (const Component *) p->data;
        if (component->type_list != NULL) {
            for (i = 0; i < component->type_list->_length; i ++) {
                const GNOME_Evolution_UserCreatableItemType *type;
                MenuItem *item;

                type = (const GNOME_Evolution_UserCreatableItemType *) component->type_list->_buffer + i;

                item = g_new (MenuItem, 1);
                item->label    = type->menuDescription;
                item->shortcut = type->menuShortcut;
                item->verb     = create_verb_from_component_number_and_type_id (component_num, type->id);

                if (type->icon.width == 0 || type->icon.height == 0)
                    item->icon = NULL;
                else
                    item->icon = e_new_gdk_pixbuf_from_corba_icon (& type->icon, 16, 16);

                menu_items = g_slist_prepend (menu_items, item);
            }
        }

        component_num ++;
    }

    if (menu_items == NULL)
        priv->menu_items = NULL;
    else
        priv->menu_items = g_slist_sort (menu_items, item_types_sort_func);
}

static void
free_menu_items (GSList *menu_items)
{
    GSList *p;

    if (menu_items == NULL)
        return;

    for (p = menu_items; p != NULL; p = p->next) {
        MenuItem *item;

        item = (MenuItem *) p->data;
        g_free (item->verb);

        if (item->icon != NULL)
            gdk_pixbuf_unref (item->icon);

        g_free (item);
    }

    g_slist_free (menu_items);
}

static const MenuItem *
find_menu_item_for_verb (EShellUserCreatableItemsHandler *handler,
             const char *verb)
{
    EShellUserCreatableItemsHandlerPrivate *priv;
    GSList *p;

    priv = handler->priv;

    for (p = priv->menu_items; p != NULL; p = p->next) {
        const MenuItem *item;

        item = (const MenuItem *) p->data;
        if (strcmp (item->verb, verb) == 0)
            return item;
    }

    return NULL;
}

static const MenuItem *
get_default_action_for_view (EShellUserCreatableItemsHandler *handler,
                 EShellView *shell_view)
{
    EShellUserCreatableItemsHandlerPrivate *priv;
    const char *view_component_id;
    const GSList *p;
    int component_num;

    priv = handler->priv;

    /* FIXME-1.2: This should be based on the folder type not the component
       that handles it.  For this, we are going to have to make the IDL a
       little more complex.  Also, this is a pretty brutal and ugly hack.  */

    view_component_id = e_shell_view_get_current_component_id (shell_view);
    if (view_component_id == NULL)
        return NULL;

    for (p = priv->components, component_num = 0; p != NULL; p = p->next, component_num ++) {
        const Component *component;
        const GNOME_Evolution_UserCreatableItemType *type;
        const char *component_id;

        component = (const Component *) p->data;
        if (component->type_list->_length == 0)
            continue;

        type = & component->type_list->_buffer[0];
        component_id = evolution_shell_component_client_get_id (component->component_client);

        if (strcmp (component_id, view_component_id) == 0) {
            const MenuItem *item;
            char *verb;

            verb = create_verb_from_component_number_and_type_id (component_num, type->id);
            item = find_menu_item_for_verb (handler, verb);
            g_free (verb);

            return item;
        }
    }

    return NULL;
}


/* The XML description for "File -> New".  */

static void
ensure_menu_xml (EShellUserCreatableItemsHandler *handler)
{
    EShellUserCreatableItemsHandlerPrivate *priv;
    GString *xml;
    GSList *p;

    priv = handler->priv;
    if (priv->menu_xml != NULL)
        return;

    ensure_menu_items (handler);

    xml = g_string_new ("");

    g_string_append (xml, "<placeholder name=\"NewItems\">");

    for (p = priv->menu_items; p != NULL; p = p->next) {
        const MenuItem *item;
        char *encoded_label;

        item = (const MenuItem *) p->data;

        encoded_label = bonobo_ui_util_encode_str (item->label);

        g_string_sprintfa (xml, "<menuitem name=\"New:%s\" verb=\"%s\" label=\"%s\"",
                   item->verb, item->verb, encoded_label);

        if (item->shortcut != '\0')
            g_string_sprintfa (xml, " accel=\"*Control**Shift*%c\"", item->shortcut);

        if (item->icon != NULL)
            g_string_sprintfa (xml, " pixtype=\"pixbuf\" pixname=\"%s\"",
                       bonobo_ui_util_pixbuf_to_xml (item->icon));

        g_string_append (xml, "/> ");

        g_free (encoded_label);
    }

    g_string_append (xml, "</placeholder>");

    priv->menu_xml = xml->str;
    g_string_free (xml, FALSE);
}


/* Verb handling.  */

static void
execute_verb (EShellUserCreatableItemsHandler *handler,
          EShellView *shell_view,
          const char *verb_name)
{
    EShellUserCreatableItemsHandlerPrivate *priv;
    const Component *component;
    int component_number;
    const char *p;
    const char *id;
    GSList *component_list_item;
    int i;

    priv = handler->priv;

    p = strchr (verb_name, ':');
    g_assert (p != NULL);
    component_number = atoi (p + 1);

    p = strchr (p + 1, ':');
    g_assert (p != NULL);
    id = p + 1;

    component_list_item = g_slist_nth (priv->components, component_number);
    g_assert (component_list_item != NULL);

    component = (const Component *) component_list_item->data;

    if (component->type_list == NULL)
        return;

    for (i = 0; i < component->type_list->_length; i ++) {
        if (strcmp (component->type_list->_buffer[i].id, id) == 0) {
            CORBA_Environment ev;

            CORBA_exception_init (&ev);

            GNOME_Evolution_ShellComponent_userCreateNewItem
                (bonobo_object_corba_objref (BONOBO_OBJECT (component->component_client)),
                 id,
                 e_safe_corba_string (e_shell_view_get_current_physical_uri (shell_view)),
                 e_safe_corba_string (e_shell_view_get_current_folder_type (shell_view)),
                 &ev);

            if (ev._major != CORBA_NO_EXCEPTION)
                g_warning ("Error in userCreateNewItem -- %s", ev._repo_id);

            CORBA_exception_free (&ev);
            return;
        }
    }
}

static void
verb_fn (BonoboUIComponent *ui_component,
     void *data,
     const char *verb_name)
{
    EShellUserCreatableItemsHandler *handler;
    EShellView *shell_view;

    shell_view = gtk_object_get_data (GTK_OBJECT (ui_component), SHELL_VIEW_KEY);
    g_assert (E_IS_SHELL_VIEW (shell_view));

    handler = E_SHELL_USER_CREATABLE_ITEMS_HANDLER (data);

    execute_verb (handler, shell_view, verb_name);
}

static void
add_verbs (EShellUserCreatableItemsHandler *handler,
       EShellView *shell_view)
{
    EShellUserCreatableItemsHandlerPrivate *priv;
    BonoboUIComponent *ui_component;
    int component_num;
    GSList *p;

    priv = handler->priv;

    ui_component = e_shell_view_get_bonobo_ui_component (shell_view);
    gtk_object_set_data (GTK_OBJECT (ui_component), SHELL_VIEW_KEY, shell_view);

    component_num = 0;
    for (p = priv->components; p != NULL; p = p->next) {
        const Component *component;
        int i;

        component = (const Component *) p->data;

        if (component->type_list != NULL) {
            for (i = 0; i < component->type_list->_length; i ++) {
                char *verb_name;

                verb_name = create_verb_from_component_number_and_type_id
                    (component_num, component->type_list->_buffer[i].id);

                bonobo_ui_component_add_verb (ui_component, verb_name, verb_fn, handler);

                g_free (verb_name);
            }
        }

        component_num ++;
    }
}


/* The "New" button in the toolbar.  */

static void
combo_button_activate_default_callback (EComboButton *combo_button,
                    void *data)
{
    EShellView *shell_view;
    EShellUserCreatableItemsHandler *handler;
    const MenuItem *menu_item;

    shell_view = E_SHELL_VIEW (data);
    handler = e_shell_get_user_creatable_items_handler (e_shell_view_get_shell (shell_view));

    menu_item = get_default_action_for_view (handler, shell_view);
    execute_verb (handler, shell_view, menu_item->verb);
}

static void
setup_toolbar_button (EShellUserCreatableItemsHandler *handler,
              EShellView *shell_view)
{
    EShellUserCreatableItemsHandlerPrivate *priv;
    BonoboUIComponent *ui_component;
    GtkWidget *combo_button;
    GtkWidget *menu;
    BonoboControl *control;

    priv = handler->priv;

    menu = gtk_menu_new ();

    combo_button = e_combo_button_new ();
    e_combo_button_set_menu (E_COMBO_BUTTON (combo_button), GTK_MENU (menu));
    e_combo_button_set_label (E_COMBO_BUTTON (combo_button), _("New"));
    gtk_widget_show (combo_button);

    gtk_signal_connect (GTK_OBJECT (combo_button), "activate_default",
                GTK_SIGNAL_FUNC (combo_button_activate_default_callback),
                shell_view);

    ui_component = e_shell_view_get_bonobo_ui_component (shell_view);
    bonobo_window_add_popup (BONOBO_WINDOW (shell_view), GTK_MENU (menu), "/popups/NewPopup");

    control = bonobo_control_new (combo_button);

    bonobo_ui_component_object_set (ui_component, "/Toolbar/NewComboButton",
                    BONOBO_OBJREF (control), NULL);

    gtk_object_set_data (GTK_OBJECT (shell_view), COMBO_BUTTON_WIDGET_KEY, combo_button);
}


/* This handles the menus for a given EShellView.  We have to rebuild the menu
   and set the toolbar button every time the view changes, and clean up when
   the view is destroyed.  */

static void
shell_view_view_changed_callback (EShellView *shell_view,
                  const char *evolution_path,
                  const char *physical_uri,
                  const char *folder_type,
                  const char *component_id,
                  void *data)
{
    EShellUserCreatableItemsHandler *handler;
    EShellUserCreatableItemsHandlerPrivate *priv;
    GtkWidget *combo_button_widget;
    const MenuItem *default_menu_item;

    handler = E_SHELL_USER_CREATABLE_ITEMS_HANDLER (data);
    priv = handler->priv;

    combo_button_widget = gtk_object_get_data (GTK_OBJECT (shell_view), COMBO_BUTTON_WIDGET_KEY);
    g_assert (E_IS_COMBO_BUTTON (combo_button_widget));

    default_menu_item = get_default_action_for_view (handler, shell_view);
    if (default_menu_item == NULL) {
        gtk_widget_set_sensitive (combo_button_widget, FALSE);
        e_combo_button_set_label (E_COMBO_BUTTON (combo_button_widget), _("New"));
        e_combo_button_set_icon (E_COMBO_BUTTON (combo_button_widget), NULL);
        return;
    }

    gtk_widget_set_sensitive (combo_button_widget, TRUE);

    e_combo_button_set_icon (E_COMBO_BUTTON (combo_button_widget), default_menu_item->icon);
}


/* GtkObject methods.  */

static void
impl_destroy (GtkObject *object)
{
    EShellUserCreatableItemsHandler *handler;
    EShellUserCreatableItemsHandlerPrivate *priv;
    GSList *p;

    handler = E_SHELL_USER_CREATABLE_ITEMS_HANDLER (object);
    priv = handler->priv;

    for (p = priv->components; p != NULL; p = p->next)
        component_free ((Component *) p->data);

    g_slist_free (priv->components);

    g_free (priv->menu_xml);

    free_menu_items (priv->menu_items);

    g_free (priv);

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


static void
class_init (GtkObjectClass *object_class)
{
    parent_class = gtk_type_class (PARENT_TYPE);

    object_class->destroy = impl_destroy;
}

static void
init (EShellUserCreatableItemsHandler *shell_user_creatable_items_handler)
{
    EShellUserCreatableItemsHandlerPrivate *priv;

    priv = g_new (EShellUserCreatableItemsHandlerPrivate, 1);
    priv->components = NULL;
    priv->menu_xml   = NULL;
    priv->menu_items = NULL;

    shell_user_creatable_items_handler->priv = priv;
}


EShellUserCreatableItemsHandler *
e_shell_user_creatable_items_handler_new (void)
{
    EShellUserCreatableItemsHandler *new;

    new = gtk_type_new (e_shell_user_creatable_items_handler_get_type ());

    return new;
}

void
e_shell_user_creatable_items_handler_add_component  (EShellUserCreatableItemsHandler *handler,
                             const char *id,
                             EvolutionShellComponentClient   *shell_component_client)
{
    EShellUserCreatableItemsHandlerPrivate *priv;

    g_return_if_fail (handler != NULL);
    g_return_if_fail (E_IS_SHELL_USER_CREATABLE_ITEMS_HANDLER (handler));
    g_return_if_fail (shell_component_client != NULL);
    g_return_if_fail (EVOLUTION_IS_SHELL_COMPONENT_CLIENT (shell_component_client));

    priv = handler->priv;
    g_return_if_fail (priv->menu_xml == NULL);

    priv->components = g_slist_prepend (priv->components, component_new (id, shell_component_client));
}


/**
 * e_shell_user_creatable_items_handler_attach_menus:
 * @handler: 
 * @shell_view: 
 * 
 * Set up the menus and toolbar items for @shell_view.  When the shell changes
 * view, the menu and the toolbar item will update automatically (i.e. the
 * actions for the current folder will go on top etc.).
 **/
void
e_shell_user_creatable_items_handler_attach_menus (EShellUserCreatableItemsHandler *handler,
                           EShellView *shell_view)
{
    BonoboUIComponent *ui_component;
    EShellUserCreatableItemsHandlerPrivate *priv;

    g_return_if_fail (handler != NULL);
    g_return_if_fail (E_IS_SHELL_USER_CREATABLE_ITEMS_HANDLER (handler));
    g_return_if_fail (shell_view != NULL);
    g_return_if_fail (E_IS_SHELL_VIEW (shell_view));

    priv = handler->priv;

    setup_toolbar_button (handler, shell_view);
    gtk_signal_connect (GTK_OBJECT (shell_view), "view_changed",
                GTK_SIGNAL_FUNC (shell_view_view_changed_callback), handler);

    ensure_menu_xml (handler);

    add_verbs (handler, shell_view);

    ui_component = e_shell_view_get_bonobo_ui_component (shell_view);
    bonobo_ui_component_set (ui_component, "/menu/File/New/NewItems", priv->menu_xml, NULL);
    bonobo_ui_component_set (ui_component, "/popups/NewPopup", priv->menu_xml, NULL);
}


E_MAKE_TYPE (e_shell_user_creatable_items_handler,
         "EShellUserCreatableItemsHandler", EShellUserCreatableItemsHandler,
         class_init, init, PARENT_TYPE)