terminal.cpp

// Copyright (c) 2024 Shaojie Li (shaojieli.nlp@gmail.com)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "./terminal.h"
#include "./define.h"

#ifdef _WIN32
#include <windows.h>
#else
#include <sys/ioctl.h>
#include <unistd.h>
#endif

#define CSI "\033["

void tc::move_to(int row, int col) {
  std::cout << CSI << row << ";" << col << "H";
}

void tc::set_fore_color(int id) { std::cout << CSI << "38;5;" << id << "m"; }

void tc::set_back_color(int id) { std::cout << CSI << "48;5;" << id << "m"; }

void tc::clear_screen() { std::cout << CSI << "2J"; }

void tc::reset_color() { std::cout << CSI << "0m"; }

void tc::hide_cursor() { std::cout << CSI << "?25l"; }

void tc::show_cursor() { std::cout << CSI << "?25h"; }

tc::Size tc::terminal_size() {
#ifdef _WIN32
  CONSOLE_SCREEN_BUFFER_INFO info{};
  if (!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &info)) {
    return {};
  }
  return Size{info.srWindow.Bottom - info.srWindow.Top + 1,
              info.srWindow.Right - info.srWindow.Left + 1};
#else
  winsize size{};
  if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) == -1) {
    return {};
  }
  return Size{static_cast<int>(size.ws_row), static_cast<int>(size.ws_col)};
#endif
}

void tc::enable_virtual_terminal() {
#ifdef _WIN32
  const HANDLE output = GetStdHandle(STD_OUTPUT_HANDLE);
  if (output == INVALID_HANDLE_VALUE) {
    return;
  }
  DWORD mode = 0;
  if (!GetConsoleMode(output, &mode)) {
    return;
  }
  SetConsoleMode(output, mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
#endif
}