minecraft-pi-reborn/mods/src/input/input.cpp
2021-06-17 17:32:24 -04:00

64 lines
2.0 KiB
C++

#include <vector>
#include <libreborn/libreborn.h>
#include "../feature/feature.h"
#include "input.h"
#include <libreborn/minecraft.h>
// Open Sign Screen
static void LocalPlayer_openTextEdit_injection(unsigned char *local_player, unsigned char *sign) {
if (*(int32_t *) (sign + TileEntity_id_property_offset) == 4) {
unsigned char *minecraft = *(unsigned char **) (local_player + LocalPlayer_minecraft_property_offset);
unsigned char *screen = (unsigned char *) ::operator new(TEXT_EDIT_SCREEN_SIZE);
ALLOC_CHECK(screen);
screen = (*TextEditScreen)(screen, sign);
(*Minecraft_setScreen)(minecraft, screen);
}
}
#define BACKSPACE_KEY 8
static int is_valid_key(char key) {
return (key >= 32 && key <= 126) || key == BACKSPACE_KEY;
}
// Store Text Input
std::vector<char> input;
void input_key_press(char key) {
if (is_valid_key(key)) {
input.push_back(key);
}
}
void input_clear_input() {
input.clear();
}
// Handle Text Input
static void TextEditScreen_updateEvents_injection(unsigned char *screen) {
// Call Original Method
(*Screen_updateEvents)(screen);
if (*(char *)(screen + 4) == '\0') {
uint32_t vtable = *((uint32_t *) screen);
for (char key : input) {
if (key == BACKSPACE_KEY) {
// Handle Backspace
(*(Screen_keyPressed_t *) (vtable + Screen_keyPressed_vtable_offset))(screen, BACKSPACE_KEY);
} else {
// Handle Nrmal Key
(*(Screen_keyboardNewChar_t *) (vtable + Screen_keyboardNewChar_vtable_offset))(screen, key);
}
}
}
input_clear_input();
}
void _init_input_cpp() {
if (feature_has("Fix Sign Placement")) {
// Fix Signs
patch_address(LocalPlayer_openTextEdit_vtable_addr, (void *) LocalPlayer_openTextEdit_injection);
patch_address(TextEditScreen_updateEvents_vtable_addr, (void *) TextEditScreen_updateEvents_injection);
}
}