91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
#include <string>
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#include <fstream>
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#include <streambuf>
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#include <vector>
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#include <unistd.h>
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#include <libcore/libcore.h>
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#include "extra.h"
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extern "C" {
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static std::string readAssetFile(__attribute__((unused)) unsigned char *obj, const std::string& path) {
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std::string full_path("./data/");
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full_path.append(path.c_str());
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std::ifstream stream(full_path);
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std::string str((std::istreambuf_iterator<char>(stream)), std::istreambuf_iterator<char>());
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return str;
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}
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typedef unsigned char *(*TextEditScreen_t)(unsigned char *, unsigned char *);
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static TextEditScreen_t TextEditScreen = (TextEditScreen_t) 0x3a840;
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typedef void (*setScreen_t)(unsigned char *, unsigned char *);
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static setScreen_t setScreen = (setScreen_t) 0x15d6c;
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static void openTextEdit(unsigned char *local_player, unsigned char *sign) {
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if (*(int *)(sign + 0x18) == 4) {
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unsigned char *minecraft = *(unsigned char **) (local_player + 0xc90);
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unsigned char *screen = (unsigned char *) ::operator new(0xd0);
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screen = (*TextEditScreen)(screen, sign);
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(*setScreen)(minecraft, screen);
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}
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}
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#define BACKSPACE_KEY 8
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static int is_valid_key(char key) {
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return (key >= 32 && key <= 126) || key == BACKSPACE_KEY;
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}
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std::vector<char> input;
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void key_press(char key) {
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if (is_valid_key(key)) {
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input.push_back(key);
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}
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}
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void clear_input() {
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input.clear();
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}
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typedef void (*updateEvents_t)(unsigned char *screen);
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static updateEvents_t updateEvents = (updateEvents_t) 0x28eb8;
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static void *updateEvents_original = NULL;
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typedef void (*keyboardNewChar_t)(unsigned char *screen, char key);
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typedef void (*keyPressed_t)(unsigned char *screen, int32_t key);
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static void updateEvents_injection(unsigned char *screen) {
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// Call Original
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revert_overwrite((void *) updateEvents, updateEvents_original);
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(*updateEvents)(screen);
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revert_overwrite((void *) updateEvents, updateEvents_original);
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if (*(char *)(screen + 4) == '\0') {
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uint32_t vtable = *((uint32_t *) screen);
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for (char key : input) {
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if (key == BACKSPACE_KEY) {
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// Handle Backspace
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(*(keyPressed_t *) (vtable + 0x6c))(screen, BACKSPACE_KEY);
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} else {
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// Handle Nrmal Key
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(*(keyboardNewChar_t *) (vtable + 0x70))(screen, key);
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}
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}
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}
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clear_input();
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}
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__attribute((constructor)) static void init() {
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// Implement AppPlatform::readAssetFile So Translations Work
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overwrite((void *) 0x12b10, (void *) readAssetFile);
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if (has_feature("Fix Sign Placement")) {
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// Fix Signs
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patch_address((void *) 0x106460, (void *) openTextEdit);
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updateEvents_original = overwrite((void *) updateEvents, (void *) updateEvents_injection);
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}
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}
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}
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