/*
    Copyright (C) 2010 ProFUSION embedded systems
    Copyright (C) 2010 Samsung Electronics

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#include "config.h"
#include "ewk_contextmenu.h"

#include "ContextMenu.h"
#include "ContextMenuController.h"
#include "ContextMenuItem.h"
#include "ewk_contextmenu_private.h"
#include <Eina.h>
#include <eina_safety_checks.h>
#include <wtf/text/CString.h>

/**
 * \struct  _Ewk_Context_Menu
 * @brief   Contains the context menu data.
 */
struct _Ewk_Context_Menu {
    unsigned int __ref; /**< the reference count of the object */
#if ENABLE(CONTEXT_MENUS)
    WebCore::ContextMenuController* controller; /**< the WebCore's object which is responsible for the context menu */
#endif
    Evas_Object* view; /**< the view object */

    Eina_List* items; /**< the list of items */
};

/**
 * \struct  _Ewk_Context_Menu_Item
 * @brief   Represents one item of the context menu object.
 */
struct _Ewk_Context_Menu_Item {
    Ewk_Context_Menu_Item_Type type; /**< contains the type of the item */
    Ewk_Context_Menu_Action action; /**< contains the action of the item */

    const char* title; /**< contains the title of the item */
    Ewk_Context_Menu* submenu; /**< contains the pointer to the submenu of the item */
    Ewk_Context_Menu* parentMenu; /**< contains the pointer to parent menu of the item */

    bool checked : 1;
    bool enabled : 1;
};

void ewk_context_menu_ref(Ewk_Context_Menu* menu)
{
    EINA_SAFETY_ON_NULL_RETURN(menu);
    menu->__ref++;
}

void ewk_context_menu_unref(Ewk_Context_Menu* menu)
{
    EINA_SAFETY_ON_NULL_RETURN(menu);
    void* item;

    if (--menu->__ref)
        return;

    EINA_LIST_FREE(menu->items, item)
        ewk_context_menu_item_free(static_cast<Ewk_Context_Menu_Item*>(item));

    delete menu;
}

Eina_Bool ewk_context_menu_destroy(Ewk_Context_Menu* menu)
{
#if ENABLE(CONTEXT_MENUS)
    EINA_SAFETY_ON_NULL_RETURN_VAL(menu, false);
    EINA_SAFETY_ON_NULL_RETURN_VAL(menu->controller, false);
    menu->controller->clearContextMenu();
    ewk_context_menu_free(menu);
    return true;
#else
    return false;
#endif
}

const Eina_List* ewk_context_menu_item_list_get(const Ewk_Context_Menu* menu)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(menu, 0);

    return menu->items;
}

Ewk_Context_Menu_Item* ewk_context_menu_item_new(Ewk_Context_Menu_Item_Type type, Ewk_Context_Menu_Action action, Ewk_Context_Menu* parentMenu,
    Ewk_Context_Menu* submenu, const char* title, Eina_Bool checked, Eina_Bool enabled)
{
    Ewk_Context_Menu_Item* item = new Ewk_Context_Menu_Item;
    item->type = type;
    item->action = action;
    item->title = eina_stringshare_add(title);
    item->parentMenu = parentMenu;
    item->submenu = submenu;
    item->checked = checked;
    item->enabled = enabled;

    return item;
}

Eina_Bool ewk_context_menu_item_select(Ewk_Context_Menu* menu, Ewk_Context_Menu_Item* item)
{
#if ENABLE(CONTEXT_MENUS)
    EINA_SAFETY_ON_NULL_RETURN_VAL(menu, false);
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, false);
    WebCore::ContextMenuAction action = static_cast<WebCore::ContextMenuAction>(item->action);
    WebCore::ContextMenuItemType type = static_cast<WebCore::ContextMenuItemType>(item->type);

    // Don't care about title and submenu as they're not used after this point.
    WebCore::ContextMenuItem core(type, action, WTF::String());
    menu->controller->contextMenuItemSelected(&core);
    return true;
#else
    return false;
#endif
}

void ewk_context_menu_item_free(Ewk_Context_Menu_Item* item)
{
    EINA_SAFETY_ON_NULL_RETURN(item);

    eina_stringshare_del(item->title);
    delete item;
}

Ewk_Context_Menu_Item_Type ewk_context_menu_item_type_get(const Ewk_Context_Menu_Item* item)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, EWK_ACTION_TYPE);
    return item->type;
}

Eina_Bool ewk_context_menu_item_type_set(Ewk_Context_Menu_Item* item, Ewk_Context_Menu_Item_Type type)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, false);
    item->type = type;
    return true;
}

Ewk_Context_Menu_Action ewk_context_menu_item_action_get(const Ewk_Context_Menu_Item* item)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, EWK_CONTEXT_MENU_ITEM_TAG_NO_ACTION);
    return item->action;
}

Eina_Bool ewk_context_menu_item_action_set(Ewk_Context_Menu_Item* item, Ewk_Context_Menu_Action action)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, false);
    item->action = action;
    return true;
}

const char* ewk_context_menu_item_title_get(const Ewk_Context_Menu_Item* item)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, 0);
    return item->title;
}

const char* ewk_context_menu_item_title_set(Ewk_Context_Menu_Item* item, const char* title)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, 0);
    eina_stringshare_replace(&item->title, title);
    return item->title;
}

Eina_Bool ewk_context_menu_item_checked_get(const Ewk_Context_Menu_Item* item)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, false);
    return item->checked;
}

Eina_Bool ewk_context_menu_item_checked_set(Ewk_Context_Menu_Item* item, Eina_Bool checked)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, false);
    item->checked = checked;
    return true;
}

Eina_Bool ewk_context_menu_item_enabled_get(const Ewk_Context_Menu_Item* item)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, false);
    return item->enabled;
}

Eina_Bool ewk_context_menu_item_enabled_set(Ewk_Context_Menu_Item* item, Eina_Bool enabled)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, false);
    item->enabled = enabled;
    return true;
}

Ewk_Context_Menu* ewk_context_menu_item_parent_get(const Ewk_Context_Menu_Item* item)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(item, 0);

    return item->parentMenu;
}

/* internal methods ****************************************************/

#if ENABLE(CONTEXT_MENUS)
/**
 * @internal
 *
 * Creates an empty context menu on view.
 *
 * @param view the view object
 * @param controller the WebCore's context menu controller
 * @return newly allocated the context menu on success or @c 0 on errors
 *
 * @note emits a signal "contextmenu,new"
 */
Ewk_Context_Menu* ewk_context_menu_new(Evas_Object* view, WebCore::ContextMenuController* controller, WebCore::ContextMenu* coreMenu)
{
    Ewk_Context_Menu* menu;
    EINA_SAFETY_ON_NULL_RETURN_VAL(view, 0);
    EINA_SAFETY_ON_NULL_RETURN_VAL(controller, 0);

    menu = new Ewk_Context_Menu;

    menu->__ref = 1;
    menu->view = view;
    menu->controller = controller;
    menu->items = 0;
    evas_object_smart_callback_call(menu->view, "contextmenu,new", menu);

    const Vector<WebCore::ContextMenuItem>* itemsList = coreMenu->platformDescription();
    for (Vector<WebCore::ContextMenuItem>::const_iterator iter = itemsList->begin(); iter != itemsList->end(); ++iter)
        ewk_context_menu_item_append(menu, *iter);

    return menu;
}

/**
 * @internal
 *
 * Frees the context menu.
 *
 * @param menu the view object
 * @return @c true on success, or @c false on failure
 *
 * @note emits a signal "contextmenu,free"
 *
 * @see ewk_context_menu_unref
 * @see ewk_context_menu_destroy
 */
bool ewk_context_menu_free(Ewk_Context_Menu* menu)
{
    EINA_SAFETY_ON_NULL_RETURN_VAL(menu, false);
    evas_object_smart_callback_call(menu->view, "contextmenu,free", menu);
    ewk_context_menu_unref(menu);
    return true;
}

/**
 * @internal
 *
 * Appends the WebCore's item to the context menu object.
 *
 * @param menu the context menu object
 * @param core the WebCore's context menu item that will be added to the context menu
 * @note emits a signal "contextmenu,item,appended"
 *
 * @see ewk_context_menu_item_new
 */
void ewk_context_menu_item_append(Ewk_Context_Menu* menu, const WebCore::ContextMenuItem& core)
{
    Ewk_Context_Menu_Item_Type type = static_cast<Ewk_Context_Menu_Item_Type>(core.type());
    Ewk_Context_Menu_Action action = static_cast<Ewk_Context_Menu_Action>(core.action());

    Ewk_Context_Menu_Item* menu_item = ewk_context_menu_item_new(type, action, menu, 0, core.title().utf8().data(), core.checked(), core.enabled());
    EINA_SAFETY_ON_NULL_RETURN(menu_item);

    menu->items = eina_list_append(menu->items, menu_item);
    evas_object_smart_callback_call(menu->view, "contextmenu,item,appended", menu);
}

/**
 * @internal
 *
 * Emits a signal "contextmenu,show"
 *
 * @param menu the context menu object
 */
void ewk_context_menu_show(Ewk_Context_Menu* menu)
{
    EINA_SAFETY_ON_NULL_RETURN(menu);

    evas_object_smart_callback_call(menu->view, "contextmenu,show", menu);
}

#endif