/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-

   client_list_menu.c for the Openbox window manager
   Copyright (c) 2006        Mikael Magnusson
   Copyright (c) 2003        Ben Jansens

   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.

   See the COPYING file for a copy of the GNU General Public License.
*/

#include "openbox.h"
#include "menu.h"
#include "menuframe.h"
#include "action.h"
#include "screen.h"
#include "client.h"
#include "focus.h"
#include "config.h"
#include "gettext.h"

#include <glib.h>

#define MENU_NAME "client-list-menu"

static GSList *desktop_menus;

typedef struct
{
    guint desktop;
} DesktopData;

static void desk_menu_update(ObMenuFrame *frame, gpointer data)
{
    ObMenu *menu = frame->menu;
    DesktopData *d = data;
    GList *it;
    gint i;
    gboolean icons = FALSE;
    gboolean empty = TRUE;

    menu_clear_entries(menu);

    for (it = focus_order[d->desktop], i = 0; it; it = g_list_next(it), ++i) {
        ObClient *c = it->data;
        if (client_normal(c) && !c->skip_taskbar) {
            GSList *acts = NULL;
            ObAction* act;
            ObMenuEntry *e;
            const ObClientIcon *icon;

            empty = FALSE;

            if (!icons && c->iconic) {
                icons = TRUE;
                menu_add_separator(menu, -1);
            }

            act = action_from_string("Activate",
                                     OB_USER_ACTION_MENU_SELECTION);
            act->data.activate.any.c = c;
            acts = g_slist_append(acts, act);
            act = action_from_string("Desktop",
                                     OB_USER_ACTION_MENU_SELECTION);
            act->data.desktop.desk = d->desktop;
            acts = g_slist_append(acts, act);
            e = menu_add_normal(menu, i,
                                (c->iconic ? c->icon_title : c->title), acts);

            if (config_menu_client_list_icons && (icon = client_icon(c, 32, 32))) {
                e->data.normal.icon_width = icon->width;
                e->data.normal.icon_height = icon->height;
                e->data.normal.icon_data = icon->data;
            }
        }
    }

    if (empty) {
        /* no entries */

        GSList *acts = NULL;
        ObAction* act;
        ObMenuEntry *e;

        act = action_from_string("Desktop", OB_USER_ACTION_MENU_SELECTION);
        act->data.desktop.desk = d->desktop;
        acts = g_slist_append(acts, act);
        e = menu_add_normal(menu, 0, _("Go there..."), acts);
        if (d->desktop == screen_desktop)
            e->data.normal.enabled = FALSE;
    }
}

/* executes it using the client in the actions, since we set that
   when we make the actions! */
static void desk_menu_execute(ObMenuEntry *self, guint state, gpointer data)
{
    ObAction *a;

    if (self->data.normal.actions) {
        a = self->data.normal.actions->data;
        action_run(self->data.normal.actions, a->data.any.c, state);
    }
}

static void desk_menu_destroy(ObMenu *menu, gpointer data)
{
    DesktopData *d = data;

    g_free(d);

    desktop_menus = g_slist_remove(desktop_menus, menu);
}

static void self_update(ObMenuFrame *frame, gpointer data)
{
    ObMenu *menu = frame->menu;
    guint i;
    GSList *it, *next;
    
    it = desktop_menus;
    for (i = 0; i < screen_num_desktops; ++i) {
        if (!it) {
            ObMenu *submenu;
            gchar *name = g_strdup_printf("%s-%u", MENU_NAME, i);
            DesktopData *data = g_new(DesktopData, 1);

            data->desktop = i;
            submenu = menu_new(name, screen_desktop_names[i], data);
            menu_set_update_func(submenu, desk_menu_update);
            menu_set_execute_func(submenu, desk_menu_execute);
            menu_set_destroy_func(submenu, desk_menu_destroy);

            menu_add_submenu(menu, i, name);

            g_free(name);

            desktop_menus = g_slist_append(desktop_menus, submenu);
        } else
            it = g_slist_next(it);
    }
    for (; it; it = next, ++i) {
        next = g_slist_next(it);
        menu_free(it->data);
        desktop_menus = g_slist_delete_link(desktop_menus, it);
        menu_entry_remove(menu_find_entry_id(menu, i));
    }
}

static void client_dest(ObClient *client, gpointer data)
{
    /* This concise function removes all references to a closed
     * client in the client_list_menu, so we don't have to check
     * in client.c */
    GSList *it;
    for (it = desktop_menus; it; it = g_slist_next(it)) {
        ObMenu *mit = it->data;
        GList *eit;
        for (eit = mit->entries; eit; eit = g_list_next(eit)) {
            ObMenuEntry *meit = eit->data;
            if (meit->type == OB_MENU_ENTRY_TYPE_NORMAL) {
                ObAction *a = meit->data.normal.actions->data;
                ObClient *c = a->data.any.c;
                if (c == client)
                    a->data.any.c = NULL;
            }
        }
    }
}

void client_list_menu_startup(gboolean reconfig)
{
    ObMenu *menu;

    if (!reconfig)
        client_add_destructor(client_dest, NULL);

    menu = menu_new(MENU_NAME, _("Desktops"), NULL);
    menu_set_update_func(menu, self_update);
}

void client_list_menu_shutdown(gboolean reconfig)
{
    if (!reconfig)
        client_remove_destructor(client_dest);
}