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#include <ruby.h>
static VALUE rb_cConsoleScreenBufferInfo;
static HANDLE
io_handle(VALUE io)
{
int fd = NUM2INT(rb_funcallv(io, rb_intern("fileno"), 0, 0));
HANDLE h = (HANDLE)rb_w32_get_osfhandle(fd);
if (h == (HANDLE)-1) rb_raise(rb_eIOError, "invalid io");
return h;
}
static VALUE
console_info(VALUE io)
{
HANDLE h = io_handle(io);
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (!GetConsoleScreenBufferInfo(h, &csbi))
rb_syserr_fail(rb_w32_map_errno(GetLastError()), "not console");
return rb_struct_new(rb_cConsoleScreenBufferInfo,
INT2FIX(csbi.dwSize.X),
INT2FIX(csbi.dwSize.Y),
INT2FIX(csbi.dwCursorPosition.X),
INT2FIX(csbi.dwCursorPosition.Y),
INT2FIX(csbi.wAttributes));
}
static VALUE
console_set_attribute(VALUE io, VALUE attr)
{
HANDLE h = io_handle(io);
SetConsoleTextAttribute(h, (WORD)NUM2INT(attr));
return Qnil;
}
#define FOREGROUND_MASK (FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY)
#define BACKGROUND_MASK (BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED | BACKGROUND_INTENSITY)
void
Init_attribute(VALUE m)
{
rb_cConsoleScreenBufferInfo = rb_struct_define_under(m, "ConsoleScreenBufferInfo",
"size_x", "size_y",
"cur_x", "cur_y",
"attr", NULL);
rb_define_method(rb_cIO, "console_info", console_info, 0);
rb_define_method(rb_cIO, "console_attribute", console_set_attribute, 1);
rb_define_const(m, "FOREGROUND_MASK", INT2FIX(FOREGROUND_MASK));
rb_define_const(m, "FOREGROUND_BLUE", INT2FIX(FOREGROUND_BLUE));
rb_define_const(m, "FOREGROUND_GREEN", INT2FIX(FOREGROUND_GREEN));
rb_define_const(m, "FOREGROUND_RED", INT2FIX(FOREGROUND_RED));
rb_define_const(m, "FOREGROUND_INTENSITY", INT2FIX(FOREGROUND_INTENSITY));
rb_define_const(m, "BACKGROUND_MASK", INT2FIX(BACKGROUND_MASK));
rb_define_const(m, "BACKGROUND_BLUE", INT2FIX(BACKGROUND_BLUE));
rb_define_const(m, "BACKGROUND_GREEN", INT2FIX(BACKGROUND_GREEN));
rb_define_const(m, "BACKGROUND_RED", INT2FIX(BACKGROUND_RED));
rb_define_const(m, "BACKGROUND_INTENSITY", INT2FIX(BACKGROUND_INTENSITY));
}
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