static COORD uv_tty_make_real_coord(uv_tty_t* handle,
CONSOLE_SCREEN_BUFFER_INFO* info, int x, unsigned char x_relative, int y,
unsigned char y_relative) {
COORD result;
uv_tty_update_virtual_window(info);
/* Adjust y position */
if (y_relative) {
y = info->dwCursorPosition.Y + y;
} else {
y = uv_tty_virtual_offset + y;
}
/* Clip y to virtual client rectangle */
if (y < uv_tty_virtual_offset) {
y = uv_tty_virtual_offset;
} else if (y >= uv_tty_virtual_offset + uv_tty_virtual_height) {
y = uv_tty_virtual_offset + uv_tty_virtual_height - 1;
}
/* Adjust x */
if (x_relative) {
x = info->dwCursorPosition.X + x;
}
/* Clip x */
if (x < 0) {
x = 0;
} else if (x >= uv_tty_virtual_width) {
x = uv_tty_virtual_width - 1;
}
result.X = (unsigned short) x;
result.Y = (unsigned short) y;
return result;
}
int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, uv_file fd) {
HANDLE win_handle;
CONSOLE_SCREEN_BUFFER_INFO info;
win_handle = (HANDLE) _get_osfhandle(fd);
if (win_handle == INVALID_HANDLE_VALUE) {
uv_set_sys_error(loop, ERROR_INVALID_HANDLE);
return -1;
}
if (!GetConsoleMode(win_handle, &tty->original_console_mode)) {
uv_set_sys_error(loop, GetLastError());
return -1;
}
/* Initialize virtual window size; if it fails, assume that this is stdin. */
if (GetConsoleScreenBufferInfo(win_handle, &info)) {
EnterCriticalSection(&uv_tty_output_lock);
uv_tty_update_virtual_window(&info);
LeaveCriticalSection(&uv_tty_output_lock);
}
uv_stream_init(loop, (uv_stream_t*) tty);
uv_connection_init((uv_stream_t*) tty);
tty->type = UV_TTY;
tty->handle = win_handle;
tty->read_line_handle = NULL;
tty->read_line_buffer = uv_null_buf_;
tty->read_raw_wait = NULL;
tty->reqs_pending = 0;
tty->flags |= UV_HANDLE_BOUND;
/* Init keycode-to-vt100 mapper state. */
tty->last_key_len = 0;
tty->last_key_offset = 0;
tty->last_utf16_high_surrogate = 0;
memset(&tty->last_input_record, 0, sizeof tty->last_input_record);
/* Init utf8-to-utf16 conversion state. */
tty->utf8_bytes_left = 0;
tty->utf8_codepoint = 0;
/* Initialize eol conversion state */
tty->previous_eol = 0;
/* Init ANSI parser state. */
tty->ansi_parser_state = ANSI_NORMAL;
return 0;
}
int uv_tty_get_winsize(uv_tty_t* tty, int* width, int* height) {
CONSOLE_SCREEN_BUFFER_INFO info;
if (!GetConsoleScreenBufferInfo(tty->handle, &info)) {
uv_set_sys_error(tty->loop, GetLastError());
return -1;
}
EnterCriticalSection(&uv_tty_output_lock);
uv_tty_update_virtual_window(&info);
LeaveCriticalSection(&uv_tty_output_lock);
*width = uv_tty_virtual_width;
*height = uv_tty_virtual_height;
return 0;
}
int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, uv_file fd, int readable) {
HANDLE handle = INVALID_HANDLE_VALUE;
DWORD original_console_mode = 0;
CONSOLE_SCREEN_BUFFER_INFO screen_buffer_info;
handle = (HANDLE) _get_osfhandle(fd);
if (handle == INVALID_HANDLE_VALUE) {
uv__set_artificial_error(loop, UV_EBADF);
return -1;
}
if (readable) {
/* Try to obtain the original console mode fromt he input handle. */
if (!GetConsoleMode(handle, &original_console_mode)) {
uv__set_sys_error(loop, GetLastError());
return -1;
}
} else {
/* Obtain the screen buffer info with the output handle. */
if (!GetConsoleScreenBufferInfo(handle, &screen_buffer_info)) {
uv__set_sys_error(loop, GetLastError());
return -1;
}
/* Obtain the the tty_output_lock because the virtual window state is */
/* shared between all uv_tty_t handles. */
EnterCriticalSection(&uv_tty_output_lock);
/* Store the global tty output handle. This handle is used by TTY read */
/* streams to update the virtual window when a CONSOLE_BUFFER_SIZE_EVENT */
/* is received. */
uv_tty_output_handle = handle;
uv_tty_update_virtual_window(&screen_buffer_info);
LeaveCriticalSection(&uv_tty_output_lock);
}
uv_stream_init(loop, (uv_stream_t*) tty, UV_TTY);
uv_connection_init((uv_stream_t*) tty);
tty->handle = handle;
tty->reqs_pending = 0;
tty->flags |= UV_HANDLE_BOUND;
if (readable) {
/* Initialize TTY input specific fields. */
tty->original_console_mode = original_console_mode;
tty->flags |= UV_HANDLE_TTY_READABLE | UV_HANDLE_READABLE;
tty->read_line_handle = NULL;
tty->read_line_buffer = uv_null_buf_;
tty->read_raw_wait = NULL;
/* Init keycode-to-vt100 mapper state. */
tty->last_key_len = 0;
tty->last_key_offset = 0;
tty->last_utf16_high_surrogate = 0;
memset(&tty->last_input_record, 0, sizeof tty->last_input_record);
} else {
/* TTY output specific fields. */
tty->flags |= UV_HANDLE_WRITABLE;
/* Init utf8-to-utf16 conversion state. */
tty->utf8_bytes_left = 0;
tty->utf8_codepoint = 0;
/* Initialize eol conversion state */
tty->previous_eol = 0;
/* Init ANSI parser state. */
tty->ansi_parser_state = ANSI_NORMAL;
}
return 0;
}
