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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2016 - Daniel De Matteis
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <boolean.h>
#include "../configuration.h"
#include "menu_driver.h"
#include "menu_navigation.h"
bool menu_navigation_ctl(enum menu_navigation_ctl_state state, void *data)
{
/* Quick jumping indices with L/R.
* Rebuilt when parsing directory. */
static struct scroll_indices
{
size_t list[2 * (26 + 2) + 1];
unsigned size;
} scroll_index;
static unsigned scroll_acceleration = 0;
static size_t selection_ptr = 0;
switch (state)
{
case MENU_NAVIGATION_CTL_DEINIT:
scroll_acceleration = 0;
selection_ptr = 0;
memset(&scroll_index, 0, sizeof(struct scroll_indices));
break;
case MENU_NAVIGATION_CTL_CLEAR:
{
size_t idx = 0;
bool scroll = true;
menu_navigation_ctl(MENU_NAVIGATION_CTL_SET_SELECTION, &idx);
menu_navigation_ctl(MENU_NAVIGATION_CTL_SET, &scroll);
menu_driver_ctl(RARCH_MENU_CTL_NAVIGATION_CLEAR, data);
}
break;
case MENU_NAVIGATION_CTL_INCREMENT:
{
settings_t *settings = config_get_ptr();
unsigned *scroll_speed = (unsigned*)data;
size_t menu_list_size = menu_entries_get_size();
if (!scroll_speed)
return false;
if (selection_ptr >= menu_list_size - 1
&& !settings->menu.navigation.wraparound.enable)
return false;
if ((selection_ptr + (*scroll_speed)) < menu_list_size)
{
size_t idx = selection_ptr + (*scroll_speed);
bool scroll = true;
menu_navigation_ctl(MENU_NAVIGATION_CTL_SET_SELECTION, &idx);
menu_navigation_ctl(MENU_NAVIGATION_CTL_SET, &scroll);
menu_navigation_ctl(MENU_NAVIGATION_CTL_INCREMENT, NULL);
}
else
{
if (settings->menu.navigation.wraparound.enable)
{
bool pending_push = false;
menu_navigation_ctl(MENU_NAVIGATION_CTL_CLEAR, &pending_push);
}
else
{
if (menu_list_size > 0)
{
menu_navigation_ctl(MENU_NAVIGATION_CTL_SET_LAST, NULL);
menu_navigation_ctl(MENU_NAVIGATION_CTL_INCREMENT, NULL);
}
}
}
menu_driver_ctl(RARCH_MENU_CTL_NAVIGATION_INCREMENT, NULL);
}
break;
case MENU_NAVIGATION_CTL_DECREMENT:
{
size_t idx = 0;
bool scroll = true;
settings_t *settings = config_get_ptr();
unsigned *scroll_speed = (unsigned*)data;
size_t menu_list_size = menu_entries_get_size();
if (!scroll_speed)
return false;
if (selection_ptr == 0
&& !settings->menu.navigation.wraparound.enable)
return false;
if (selection_ptr >= *scroll_speed)
idx = selection_ptr - *scroll_speed;
else
{
idx = menu_list_size - 1;
if (!settings->menu.navigation.wraparound.enable)
idx = 0;
}
menu_navigation_ctl(MENU_NAVIGATION_CTL_SET_SELECTION, &idx);
menu_navigation_ctl(MENU_NAVIGATION_CTL_SET, &scroll);
menu_navigation_ctl(MENU_NAVIGATION_CTL_DECREMENT, NULL);
menu_driver_ctl(RARCH_MENU_CTL_NAVIGATION_DECREMENT, NULL);
}
break;
case MENU_NAVIGATION_CTL_SET:
menu_driver_ctl(RARCH_MENU_CTL_NAVIGATION_SET, data);
break;
case MENU_NAVIGATION_CTL_SET_LAST:
{
size_t menu_list_size = menu_entries_get_size();
size_t new_selection = menu_list_size - 1;
menu_navigation_ctl(
MENU_NAVIGATION_CTL_SET_SELECTION, &new_selection);
menu_driver_ctl(RARCH_MENU_CTL_NAVIGATION_SET_LAST, NULL);
}
break;
case MENU_NAVIGATION_CTL_ASCEND_ALPHABET:
{
size_t i = 0, ptr;
size_t *ptr_out = (size_t*)&selection_ptr;
size_t menu_list_size = menu_entries_get_size();
if (!scroll_index.size || !ptr_out)
return false;
ptr = *ptr_out;
if (ptr == scroll_index.list[scroll_index.size - 1])
{
*ptr_out = menu_list_size - 1;
menu_driver_ctl(RARCH_MENU_CTL_NAVIGATION_ASCEND_ALPHABET, ptr_out);
return true;
}
while (i < scroll_index.size - 1
&& scroll_index.list[i + 1] <= ptr)
i++;
*ptr_out = scroll_index.list[i + 1];
if (*ptr_out >= menu_list_size)
*ptr_out = menu_list_size - 1;
menu_driver_ctl(RARCH_MENU_CTL_NAVIGATION_ASCEND_ALPHABET, ptr_out);
}
break;
case MENU_NAVIGATION_CTL_DESCEND_ALPHABET:
{
size_t i = 0, ptr;
size_t *ptr_out = (size_t*)&selection_ptr;
if (!scroll_index.size || !ptr_out)
return false;
ptr = *ptr_out;
if (ptr == 0)
return false;
i = scroll_index.size - 1;
while (i && scroll_index.list[i - 1] >= ptr)
i--;
*ptr_out = scroll_index.list[i - 1];
menu_driver_ctl(
RARCH_MENU_CTL_NAVIGATION_DESCEND_ALPHABET, ptr_out);
}
break;
case MENU_NAVIGATION_CTL_GET_SELECTION:
{
size_t *sel = (size_t*)data;
if (!sel)
return false;
*sel = selection_ptr;
}
break;
case MENU_NAVIGATION_CTL_SET_SELECTION:
{
size_t *sel = (size_t*)data;
if (!sel)
return false;
selection_ptr = *sel;
}
break;
case MENU_NAVIGATION_CTL_CLEAR_SCROLL_INDICES:
scroll_index.size = 0;
break;
case MENU_NAVIGATION_CTL_ADD_SCROLL_INDEX:
{
size_t *sel = (size_t*)data;
if (!sel)
return false;
scroll_index.list[scroll_index.size++] = *sel;
}
break;
case MENU_NAVIGATION_CTL_GET_SCROLL_ACCEL:
{
size_t *sel = (size_t*)data;
if (!sel)
return false;
*sel = scroll_acceleration;
}
break;
case MENU_NAVIGATION_CTL_SET_SCROLL_ACCEL:
{
size_t *sel = (size_t*)data;
if (!sel)
return false;
scroll_acceleration = *sel;
}
break;
default:
case MENU_NAVIGATION_CTL_NONE:
break;
}
return true;
}
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