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69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
#include <ruby.h>
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static VALUE rb_cConsoleScreenBufferInfo;
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static HANDLE
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io_handle(VALUE io)
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{
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int fd = NUM2INT(rb_funcallv(io, rb_intern("fileno"), 0, 0));
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HANDLE h = (HANDLE)rb_w32_get_osfhandle(fd);
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if (h == (HANDLE)-1) rb_raise(rb_eIOError, "invalid io");
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return h;
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}
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static VALUE
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console_info(VALUE klass, VALUE io)
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{
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HANDLE h = io_handle(io);
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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if (!GetConsoleScreenBufferInfo(h, &csbi))
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rb_syserr_fail(rb_w32_map_errno(GetLastError()), "not console");
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return rb_struct_new(rb_cConsoleScreenBufferInfo,
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INT2FIX(csbi.dwSize.X),
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INT2FIX(csbi.dwSize.Y),
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INT2FIX(csbi.dwCursorPosition.X),
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INT2FIX(csbi.dwCursorPosition.Y),
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INT2FIX(csbi.wAttributes));
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}
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static VALUE
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console_set_attribute(VALUE klass, VALUE io, VALUE attr)
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{
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HANDLE h = io_handle(io);
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SetConsoleTextAttribute(h, (WORD)NUM2INT(attr));
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return Qnil;
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}
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#define FOREGROUND_MASK (FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY)
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#define BACKGROUND_MASK (BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED | BACKGROUND_INTENSITY)
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void
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Init_attribute(VALUE m)
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{
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rb_cConsoleScreenBufferInfo = rb_struct_define_under(m, "ConsoleScreenBufferInfo",
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"size_x", "size_y",
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"cur_x", "cur_y",
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"attr", NULL);
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rb_define_singleton_method(m, "console_info", console_info, 1);
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rb_define_singleton_method(m, "console_attribute", console_set_attribute, 2);
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rb_define_const(m, "FOREGROUND_MASK", INT2FIX(FOREGROUND_MASK));
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rb_define_const(m, "FOREGROUND_BLUE", INT2FIX(FOREGROUND_BLUE));
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rb_define_const(m, "FOREGROUND_GREEN", INT2FIX(FOREGROUND_GREEN));
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rb_define_const(m, "FOREGROUND_RED", INT2FIX(FOREGROUND_RED));
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rb_define_const(m, "FOREGROUND_INTENSITY", INT2FIX(FOREGROUND_INTENSITY));
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rb_define_const(m, "BACKGROUND_MASK", INT2FIX(BACKGROUND_MASK));
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rb_define_const(m, "BACKGROUND_BLUE", INT2FIX(BACKGROUND_BLUE));
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rb_define_const(m, "BACKGROUND_GREEN", INT2FIX(BACKGROUND_GREEN));
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rb_define_const(m, "BACKGROUND_RED", INT2FIX(BACKGROUND_RED));
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rb_define_const(m, "BACKGROUND_INTENSITY", INT2FIX(BACKGROUND_INTENSITY));
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#ifndef COMMON_LVB_REVERSE_VIDEO
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#define COMMON_LVB_REVERSE_VIDEO 0x4000
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#endif
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rb_define_const(m, "REVERSE_VIDEO", INT2FIX(COMMON_LVB_REVERSE_VIDEO));
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}
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