mirror of
https://github.com/libretro/RetroArch.git
synced 2024-12-01 04:00:32 +00:00
160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2015 - Daniel De Matteis
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <ctype.h>
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#include "menu_navigation.h"
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/**
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* menu_navigation_clear:
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* @menu : menu handle
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* @pending_push : pending push ?
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*
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* Clears the navigation pointer.
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**/
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void menu_navigation_clear(menu_handle_t *menu, bool pending_push)
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{
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menu->selection_ptr = 0;
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if (driver.menu_ctx && driver.menu_ctx->navigation_clear)
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driver.menu_ctx->navigation_clear(menu, pending_push);
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}
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/**
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* menu_navigation_decrement:
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* @menu : menu handle
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*
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* Decrement the navigation pointer.
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**/
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void menu_navigation_decrement(menu_handle_t *menu)
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{
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menu->selection_ptr--;
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if (driver.menu_ctx && driver.menu_ctx->navigation_decrement)
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driver.menu_ctx->navigation_decrement(menu);
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}
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/**
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* menu_navigation_increment:
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* @menu : menu handle
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*
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* Increment the navigation pointer.
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**/
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void menu_navigation_increment(menu_handle_t *menu)
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{
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menu->selection_ptr++;
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if (driver.menu_ctx && driver.menu_ctx->navigation_increment)
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driver.menu_ctx->navigation_increment(menu);
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}
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/**
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* menu_navigation_set:
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* @menu : menu handle
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* @idx : index to set navigation pointer to.
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* @scroll : should we scroll when needed?
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*
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* Sets navigation pointer to index @idx.
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**/
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void menu_navigation_set(menu_handle_t *menu, size_t idx, bool scroll)
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{
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menu->selection_ptr = idx;
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if (driver.menu_ctx && driver.menu_ctx->navigation_set)
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driver.menu_ctx->navigation_set(menu, scroll);
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}
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/**
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* menu_navigation_set_last:
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* @menu : menu handle
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*
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* Sets navigation pointer to last index.
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**/
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void menu_navigation_set_last(menu_handle_t *menu)
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{
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menu->selection_ptr = menu_list_get_size(driver.menu->menu_list) - 1;
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if (driver.menu_ctx && driver.menu_ctx->navigation_set_last)
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driver.menu_ctx->navigation_set_last(menu);
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}
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/**
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* menu_navigation_descend_alphabet:
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* @menu : menu handle
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* @ptr_out : Amount of indices to 'scroll' to get
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* to the next entry.
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*
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* Descends alphabet.
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* E.g.:
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* If navigation points to an entry called 'Beta',
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* navigation pointer will be set to an entry called 'Alpha'.
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**/
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void menu_navigation_descend_alphabet(menu_handle_t *menu, size_t *ptr_out)
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{
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size_t i = 0;
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size_t ptr = *ptr_out;
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if (!menu->scroll_indices_size)
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return;
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if (ptr == 0)
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return;
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i = menu->scroll_indices_size - 1;
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while (i && menu->scroll_indices[i - 1] >= ptr)
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i--;
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*ptr_out = menu->scroll_indices[i - 1];
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if (driver.menu_ctx && driver.menu_ctx->navigation_descend_alphabet)
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driver.menu_ctx->navigation_descend_alphabet(menu, ptr_out);
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}
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/**
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* menu_navigation_ascends_alphabet:
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* @menu : menu handle
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* @ptr_out : Amount of indices to 'scroll' to get
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* to the next entry.
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*
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* Ascends alphabet.
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* E.g.:
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* If navigation points to an entry called 'Alpha',
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* navigation pointer will be set to an entry called 'Beta'.
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**/
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void menu_navigation_ascend_alphabet(menu_handle_t *menu, size_t *ptr_out)
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{
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size_t i = 0;
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size_t ptr = *ptr_out;
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if (!menu->scroll_indices_size)
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return;
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if (ptr == menu->scroll_indices[menu->scroll_indices_size - 1])
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return;
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while (i < menu->scroll_indices_size - 1
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&& menu->scroll_indices[i + 1] <= ptr)
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i++;
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*ptr_out = menu->scroll_indices[i + 1];
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if (driver.menu_ctx && driver.menu_ctx->navigation_descend_alphabet)
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driver.menu_ctx->navigation_descend_alphabet(menu, ptr_out);
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}
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