/* 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 . */ #include #include #include #include #include #include #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(); bool wraparound_enable = settings->menu.navigation.wraparound.enable; if (!scroll_speed) return false; if (selection_ptr >= menu_list_size - 1 && !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 (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(); bool wraparound_enable = settings->menu.navigation.wraparound.enable; if (!scroll_speed) return false; if (selection_ptr == 0 && !wraparound_enable) return false; if (selection_ptr >= *scroll_speed) idx = selection_ptr - *scroll_speed; else { idx = menu_list_size - 1; if (!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; case MENU_NAVIGATION_CTL_NONE: break; } return true; }