Class: IO

Inherits:
Object
  • Object
show all
Defined in:
(unknown)

Defined Under Namespace

Modules: generic_readable

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.console ⇒ #<File:/dev/tty .console(sym, *args) ⇒ Object

Returns an File instance opened console.

If sym is given, it will be sent to the opened console with args and the result will be returned instead of the console IO itself.

You must require ‘io/console’ to use this method.

Overloads:

  • .console ⇒ #<File:/dev/tty

    Returns ].

    Returns:

    • (#<File:/dev/tty) —

      ]



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# File 'ext/io/console/console.c', line 779

static VALUE
console_dev(int argc, VALUE *argv, VALUE klass)
{
    VALUE con = 0;
    rb_io_t *fptr;
    VALUE sym = 0;

    rb_check_arity(argc, 0, UNLIMITED_ARGUMENTS);
    if (argc) {
	Check_Type(sym = argv[0], T_SYMBOL);
    }
    if (klass == rb_cIO) klass = rb_cFile;
    if (rb_const_defined(klass, id_console)) {
	con = rb_const_get(klass, id_console);
	if (!RB_TYPE_P(con, T_FILE) ||
	    (!(fptr = RFILE(con)->fptr) || GetReadFD(fptr) == -1)) {
	    rb_const_remove(klass, id_console);
	    con = 0;
	}
    }
    if (sym) {
	if (sym == ID2SYM(id_close) && argc == 1) {
	    if (con) {
		rb_io_close(con);
		rb_const_remove(klass, id_console);
		con = 0;
	    }
	    return Qnil;
	}
    }
    if (!con) {
	VALUE args[2];
#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H || defined HAVE_SGTTY_H
# define CONSOLE_DEVICE "/dev/tty"
#elif defined _WIN32
# define CONSOLE_DEVICE "con$"
# define CONSOLE_DEVICE_FOR_READING "conin$"
# define CONSOLE_DEVICE_FOR_WRITING "conout$"
#endif
#ifndef CONSOLE_DEVICE_FOR_READING
# define CONSOLE_DEVICE_FOR_READING CONSOLE_DEVICE
#endif
#ifdef CONSOLE_DEVICE_FOR_WRITING
	VALUE out;
	rb_io_t *ofptr;
#endif
	int fd;

#ifdef CONSOLE_DEVICE_FOR_WRITING
	fd = rb_cloexec_open(CONSOLE_DEVICE_FOR_WRITING, O_RDWR, 0);
	if (fd < 0) return Qnil;
        rb_update_max_fd(fd);
	args[1] = INT2FIX(O_WRONLY);
	args[0] = INT2NUM(fd);
	out = rb_class_new_instance(2, args, klass);
#endif
	fd = rb_cloexec_open(CONSOLE_DEVICE_FOR_READING, O_RDWR, 0);
	if (fd < 0) {
#ifdef CONSOLE_DEVICE_FOR_WRITING
	    rb_io_close(out);
#endif
	    return Qnil;
	}
        rb_update_max_fd(fd);
	args[1] = INT2FIX(O_RDWR);
	args[0] = INT2NUM(fd);
	con = rb_class_new_instance(2, args, klass);
	GetOpenFile(con, fptr);
	fptr->pathv = rb_obj_freeze(rb_str_new2(CONSOLE_DEVICE));
#ifdef CONSOLE_DEVICE_FOR_WRITING
	GetOpenFile(out, ofptr);
	ofptr->pathv = fptr->pathv;
	fptr->tied_io_for_writing = out;
	ofptr->mode |= FMODE_SYNC;
#endif
	fptr->mode |= FMODE_SYNC;
	rb_const_set(klass, id_console, con);
    }
    if (sym) {
	return rb_f_send(argc, argv, con);
    }
    return con;
}

.default_console_size ⇒ Object

fallback to console window size



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# File 'lib/io/console/size.rb', line 3

def IO.default_console_size
  [
    ENV["LINES"].to_i.nonzero? || 25,
    ENV["COLUMNS"].to_i.nonzero? || 80,
  ]
end

Instance Method Details

#beep ⇒ Object 



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# File 'ext/io/console/console.c', line 673

static VALUE
console_beep(VALUE io)
{
    rb_io_t *fptr;
    int fd;

    GetOpenFile(io, fptr);
    fd = GetWriteFD(fptr);
#ifdef _WIN32
    (void)fd;
    MessageBeep(0);
#else
    if (write(fd, "\a", 1) < 0)
	rb_sys_fail(0);
#endif
    return io;
}

#cooked {|io| ... } ⇒ Object

Yields self within cooked mode.

STDIN.cooked(&:gets)

will read and return a line with echo back and line editing.

You must require ‘io/console’ to use this method.

Yields:

  • (io) 


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# File 'ext/io/console/console.c', line 357

static VALUE
console_cooked(VALUE io)
{
    return ttymode(io, rb_yield, set_cookedmode, NULL);
}

#cooked! ⇒ Object

Enables cooked mode.

If the terminal mode needs to be back, use io.cooked { … }.

You must require ‘io/console’ to use this method.



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# File 'ext/io/console/console.c', line 373

static VALUE
console_set_cooked(VALUE io)
{
    conmode t;
    rb_io_t *fptr;
    int fd;

    GetOpenFile(io, fptr);
    fd = GetReadFD(fptr);
    if (!getattr(fd, &t)) rb_sys_fail(0);
    set_cookedmode(&t, NULL);
    if (!setattr(fd, &t)) rb_sys_fail(0);
    return io;
}

#cursor ⇒ Object 



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# File 'ext/io/console/console.c', line 709

static VALUE
console_cursor_pos(VALUE io)
{
    rb_io_t *fptr;
    int fd;
    rb_console_size_t ws;

    GetOpenFile(io, fptr);
    fd = GetWriteFD(fptr);
    if (!GetConsoleScreenBufferInfo((HANDLE)rb_w32_get_osfhandle(fd), &ws)) {
	rb_syserr_fail(LAST_ERROR, 0);
    }
    return rb_assoc_new(UINT2NUM(ws.dwCursorPosition.X), UINT2NUM(ws.dwCursorPosition.Y));
}

#cursor=(cpos) ⇒ Object 



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# File 'ext/io/console/console.c', line 724

static VALUE
console_cursor_set(VALUE io, VALUE cpos)
{
    cpos = rb_convert_type(cpos, T_ARRAY, "Array", "to_ary");
    if (RARRAY_LEN(cpos) != 2) rb_raise(rb_eArgError, "expected 2D coordinate");
    return console_goto(io, RARRAY_AREF(cpos, 0), RARRAY_AREF(cpos, 1));
}

#echo=(flag) ⇒ Object

Enables/disables echo back. On some platforms, all combinations of this flags and raw/cooked mode may not be valid.

You must require ‘io/console’ to use this method.



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# File 'ext/io/console/console.c', line 439

static VALUE
console_set_echo(VALUE io, VALUE f)
{
    conmode t;
    rb_io_t *fptr;
    int fd;

    GetOpenFile(io, fptr);
    fd = GetReadFD(fptr);
    if (!getattr(fd, &t)) rb_sys_fail(0);
    if (RTEST(f))
	set_echo(&t, NULL);
    else
	set_noecho(&t, NULL);
    if (!setattr(fd, &t)) rb_sys_fail(0);
    return io;
}

#echo? ⇒ Boolean

Returns true if echo back is enabled.

You must require ‘io/console’ to use this method.

Returns:

  • (Boolean) 


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# File 'ext/io/console/console.c', line 465

static VALUE
console_echo_p(VALUE io)
{
    conmode t;
    rb_io_t *fptr;
    int fd;

    GetOpenFile(io, fptr);
    fd = GetReadFD(fptr);
    if (!getattr(fd, &t)) rb_sys_fail(0);
    return echo_p(&t) ? Qtrue : Qfalse;
}

#getch(min: nil, time: nil) ⇒ String

Reads and returns a character in raw mode.

See IO#raw for details on the parameters.

You must require ‘io/console’ to use this method.

Returns:

  • (String) 


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# File 'ext/io/console/console.c', line 404

static VALUE
console_getch(int argc, VALUE *argv, VALUE io)
{
    rawmode_arg_t opts, *optp = rawmode_opt(argc, argv, &opts);
    return ttymode(io, getc_call, set_rawmode, optp);
}

#getpass(prompt = nil) ⇒ String

Reads and returns a line without echo back. Prints prompt unless it is nil.

You must require ‘io/console’ to use this method.

Returns:

  • (String) 


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# File 'ext/io/console/console.c', line 917

static VALUE
console_getpass(int argc, VALUE *argv, VALUE io)
{
    VALUE str, wio;

    rb_check_arity(argc, 0, 1);
    wio = rb_io_get_write_io(io);
    if (wio == io && io == rb_stdin) wio = rb_stderr;
    prompt(argc, argv, wio);
    str = rb_ensure(getpass_call, io, puts_call, wio);
    return str_chomp(str);
}

#goto(x, y) ⇒ Object 



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# File 'ext/io/console/console.c', line 692

static VALUE
console_goto(VALUE io, VALUE x, VALUE y)
{
    rb_io_t *fptr;
    int fd;
    COORD pos;

    GetOpenFile(io, fptr);
    fd = GetWriteFD(fptr);
    pos.X = NUM2UINT(x);
    pos.Y = NUM2UINT(y);
    if (!SetConsoleCursorPosition((HANDLE)rb_w32_get_osfhandle(fd), pos)) {
	rb_syserr_fail(LAST_ERROR, 0);
    }
    return io;
}

#iflush ⇒ Object

Flushes input buffer in kernel.

You must require ‘io/console’ to use this method.



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# File 'ext/io/console/console.c', line 604

static VALUE
console_iflush(VALUE io)
{
    rb_io_t *fptr;
    int fd;

    GetOpenFile(io, fptr);
    fd = GetReadFD(fptr);
#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
    if (tcflush(fd, TCIFLUSH)) rb_sys_fail(0);
#endif
    (void)fd;
    return io;
}

#ioflush ⇒ Object

Flushes input and output buffers in kernel.

You must require ‘io/console’ to use this method.



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# File 'ext/io/console/console.c', line 650

static VALUE
console_ioflush(VALUE io)
{
    rb_io_t *fptr;
#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
    int fd1, fd2;
#endif

    GetOpenFile(io, fptr);
#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
    fd1 = GetReadFD(fptr);
    fd2 = GetWriteFD(fptr);
    if (fd2 != -1 && fd1 != fd2) {
	if (tcflush(fd1, TCIFLUSH)) rb_sys_fail(0);
	if (tcflush(fd2, TCOFLUSH)) rb_sys_fail(0);
    }
    else {
	if (tcflush(fd1, TCIOFLUSH)) rb_sys_fail(0);
    }
#endif
    return io;
}

#noecho {|io| ... } ⇒ Object

Yields self with disabling echo back.

STDIN.noecho(&:gets)

will read and return a line without echo back.

You must require ‘io/console’ to use this method.

Yields:

  • (io) 


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# File 'ext/io/console/console.c', line 423

static VALUE
console_noecho(VALUE io)
{
    return ttymode(io, rb_yield, set_noecho, NULL);
}

#oflush ⇒ Object

Flushes output buffer in kernel.

You must require ‘io/console’ to use this method.



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# File 'ext/io/console/console.c', line 627

static VALUE
console_oflush(VALUE io)
{
    rb_io_t *fptr;
    int fd;

    GetOpenFile(io, fptr);
    fd = GetWriteFD(fptr);
#if defined HAVE_TERMIOS_H || defined HAVE_TERMIO_H
    if (tcflush(fd, TCOFLUSH)) rb_sys_fail(0);
#endif
    (void)fd;
    return io;
}

#pressed?(k) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/io/console/console.c', line 734

static VALUE
console_key_pressed_p(VALUE io, VALUE k)
{
    int vk = -1;

    if (FIXNUM_P(k)) {
	vk = NUM2UINT(k);
    }
    else {
	const struct vktable *t;
	const char *kn;
	if (SYMBOL_P(k)) {
	    k = rb_sym2str(k);
	    kn = RSTRING_PTR(k);
	}
	else {
	    kn = StringValuePtr(k);
	}
	t = console_win32_vk(kn, RSTRING_LEN(k));
	if (!t || (vk = (short)t->vk) == -1) {
	    rb_raise(rb_eArgError, "unknown virtual key code: % "PRIsVALUE, k);
	}
    }
    return GetKeyState(vk) & 0x80 ? Qtrue : Qfalse;
}

#raw(min: nil, time: nil) {|io| ... } ⇒ Object

Yields self within raw mode.

STDIN.raw(&:gets)

will read and return a line without echo back and line editing.

The parameter min specifies the minimum number of bytes that should be received when a read operation is performed. (default: 1)

The parameter time specifies the timeout in seconds with a precision of 1/10 of a second. (default: 0)

Refer to the manual page of termios for further details.

You must require ‘io/console’ to use this method.

Yields:

  • (io) 


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# File 'ext/io/console/console.c', line 310

static VALUE
console_raw(int argc, VALUE *argv, VALUE io)
{
    rawmode_arg_t opts, *optp = rawmode_opt(argc, argv, &opts);
    return ttymode(io, rb_yield, set_rawmode, optp);
}

#raw!(min: nil, time: nil) ⇒ Object

Enables raw mode.

If the terminal mode needs to be back, use io.raw { … }.

See IO#raw for details on the parameters.

You must require ‘io/console’ to use this method.



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# File 'ext/io/console/console.c', line 329

static VALUE
console_set_raw(int argc, VALUE *argv, VALUE io)
{
    conmode t;
    rb_io_t *fptr;
    int fd;
    rawmode_arg_t opts, *optp = rawmode_opt(argc, argv, &opts);

    GetOpenFile(io, fptr);
    fd = GetReadFD(fptr);
    if (!getattr(fd, &t)) rb_sys_fail(0);
    set_rawmode(&t, optp);
    if (!setattr(fd, &t)) rb_sys_fail(0);
    return io;
}

#winsize ⇒ Array

Returns console size.

You must require ‘io/console’ to use this method.

Returns:

  • (Array) 


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# File 'ext/io/console/console.c', line 506

static VALUE
console_winsize(VALUE io)
{
    rb_io_t *fptr;
    int fd;
    rb_console_size_t ws;

    GetOpenFile(io, fptr);
    fd = GetWriteFD(fptr);
    if (!getwinsize(fd, &ws)) rb_sys_fail(0);
    return rb_assoc_new(INT2NUM(winsize_row(&ws)), INT2NUM(winsize_col(&ws)));
}

#winsize=(size) ⇒ Object

Tries to set console size. The effect depends on the platform and the running environment.

You must require ‘io/console’ to use this method.



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# File 'ext/io/console/console.c', line 528

static VALUE
console_set_winsize(VALUE io, VALUE size)
{
    rb_io_t *fptr;
    rb_console_size_t ws;
#if defined _WIN32
    HANDLE wh;
    int newrow, newcol;
    BOOL ret;
#endif
    VALUE row, col, xpixel, ypixel;
    const VALUE *sz;
    int fd;
    long sizelen;

    GetOpenFile(io, fptr);
    size = rb_Array(size);
    if ((sizelen = RARRAY_LEN(size)) != 2 && sizelen != 4) {
	rb_raise(rb_eArgError,
		 "wrong number of arguments (given %ld, expected 2 or 4)",
		 sizelen);
    }
    sz = RARRAY_CONST_PTR(size);
    row = sz[0], col = sz[1], xpixel = ypixel = Qnil;
    if (sizelen == 4) xpixel = sz[2], ypixel = sz[3];
    fd = GetWriteFD(fptr);
#if defined TIOCSWINSZ
    ws.ws_row = ws.ws_col = ws.ws_xpixel = ws.ws_ypixel = 0;
#define SET(m) ws.ws_##m = NIL_P(m) ? 0 : (unsigned short)NUM2UINT(m)
    SET(row);
    SET(col);
    SET(xpixel);
    SET(ypixel);
#undef SET
    if (!setwinsize(fd, &ws)) rb_sys_fail(0);
#elif defined _WIN32
    wh = (HANDLE)rb_w32_get_osfhandle(fd);
#define SET(m) new##m = NIL_P(m) ? 0 : (unsigned short)NUM2UINT(m)
    SET(row);
    SET(col);
#undef SET
    if (!NIL_P(xpixel)) (void)NUM2UINT(xpixel);
    if (!NIL_P(ypixel)) (void)NUM2UINT(ypixel);
    if (!GetConsoleScreenBufferInfo(wh, &ws)) {
	rb_syserr_fail(LAST_ERROR, "GetConsoleScreenBufferInfo");
    }
    ws.dwSize.X = newcol;
    ret = SetConsoleScreenBufferSize(wh, ws.dwSize);
    ws.srWindow.Left = 0;
    ws.srWindow.Top = 0;
    ws.srWindow.Right = newcol-1;
    ws.srWindow.Bottom = newrow-1;
    if (!SetConsoleWindowInfo(wh, TRUE, &ws.srWindow)) {
	rb_syserr_fail(LAST_ERROR, "SetConsoleWindowInfo");
    }
    /* retry when shrinking buffer after shrunk window */
    if (!ret && !SetConsoleScreenBufferSize(wh, ws.dwSize)) {
	rb_syserr_fail(LAST_ERROR, "SetConsoleScreenBufferInfo");
    }
    /* remove scrollbar if possible */
    if (!SetConsoleWindowInfo(wh, TRUE, &ws.srWindow)) {
	rb_syserr_fail(LAST_ERROR, "SetConsoleWindowInfo");
    }
#endif
    return io;
}