curs_attr(3X)                                                    curs_attr(3X)

       attroff,  wattroff,  attron,  wattron,  attrset,  wattrset,  color_set,
       wcolor_set,  standend,  wstandend,   standout,   wstandout,   attr_get,
       wattr_get, attr_off, wattr_off, attr_on, wattr_on, attr_set, wattr_set,
       chgat, wchgat, mvchgat, mvwchgat, PAIR_NUMBER -  curses  character  and
       window attribute control routines

       #include <curses.h>
       int attroff(int attrs);
       int wattroff(WINDOW *win, int attrs);
       int attron(int attrs);
       int wattron(WINDOW *win, int attrs);
       int attrset(int attrs);
       int wattrset(WINDOW *win, int attrs);
       int color_set(short color_pair_number, void* opts);
       int wcolor_set(WINDOW *win, short color_pair_number,
             void* opts);
       int standend(void);
       int wstandend(WINDOW *win);
       int standout(void);
       int wstandout(WINDOW *win);
       int attr_get(attr_t *attrs, short *pair, void *opts);
       int wattr_get(WINDOW *win, attr_t *attrs, short *pair,
              void *opts);
       int attr_off(attr_t attrs, void *opts);
       int wattr_off(WINDOW *win, attr_t attrs, void *opts);
       int attr_on(attr_t attrs, void *opts);
       int wattr_on(WINDOW *win, attr_t attrs, void *opts);
       int attr_set(attr_t attrs, short pair, void *opts);
       int wattr_set(WINDOW *win, attr_t attrs, short pair, void *opts);
       int chgat(int n, attr_t attr, short color,
             const void *opts)
       int wchgat(WINDOW *win, int n, attr_t attr,
             short color, const void *opts)
       int mvchgat(int y, int x, int n, attr_t attr,
             short color, const void *opts)
       int mvwchgat(WINDOW *win, int y, int x, int n,
             attr_t attr, short color, const void *opts)

       These  routines  manipulate the current attributes of the named window.
       The current attributes of a window apply to  all  characters  that  are
       written  into  the window with waddch, waddstr and wprintw.  Attributes
       are a property of the character, and move with  the  character  through
       any  scrolling  and  insert/delete  line/character  operations.  To the
       extent possible, they are displayed as appropriate modifications to the
       graphic rendition of characters put on the screen.

       The  routine attrset sets the current attributes of the given window to
       attrs.  The routine attroff turns  off  the  named  attributes  without
       turning  any  other  attributes on or off.  The routine attron turns on
       the named attributes without affecting any others.  The routine  stand-
       out  is  the  same  as attron(A_STANDOUT).  The routine standend is the
       same as attrset(A_NORMAL) or attrset(0), that  is,  it  turns  off  all

       The attrset and related routines do not affect the attributes used when
       erasing portions of the window.  See curs_bkgd(3X) for functions  which
       modify the attributes used for erasing and clearing.

       The routine color_set sets the current color of the given window to the
       foreground/background combination described by  the  color_pair_number.
       The parameter opts is reserved for future use, applications must supply
       a null pointer.

       The routine wattr_get returns the current attribute and color pair  for
       the given window; attr_get returns the current attribute and color pair
       for stdscr.  The remaining attr_* functions operate  exactly  like  the
       corresponding  attr* functions, except that they take arguments of type
       attr_t rather than int.

       The routine chgat changes the attributes of a given number  of  charac-
       ters  starting  at  the current cursor location of stdscr.  It does not
       update the cursor and does not perform wrapping.  A character count  of
       -1  or  greater  than  the  remaining  window  width  means  to  change
       attributes all the way to the end of  the  current  line.   The  wchgat
       function  generalizes  this to any window; the mvwchgat function does a
       cursor move before acting.  In these functions, the color argument is a
       color-pair   index   (as  in  the  first  argument  of  init_pair,  see
       curs_color(3X)).  The opts argument  is  not  presently  used,  but  is
       reserved  for  the  future  (leave  it  NULL).   Note that changing the
       attributes does not imply that a subsequent  refresh  will  update  the
       screen  to  match,  since  the  character values are not modified.  Use
       touchwin to force the screen to match the updated attributes.

       The following video attributes, defined in <curses.h>, can be passed to
       the routines attron, attroff, and attrset, or OR'ed with the characters
       passed to addch.

               A_NORMAL        Normal display (no highlight)
               A_STANDOUT      Best highlighting mode of the terminal.
               A_UNDERLINE     Underlining
               A_REVERSE       Reverse video
               A_BLINK         Blinking
               A_DIM           Half bright
               A_BOLD          Extra bright or bold
               A_PROTECT       Protected mode
               A_INVIS         Invisible or blank mode
               A_ALTCHARSET    Alternate character set
               A_CHARTEXT      Bit-mask to extract a character
               COLOR_PAIR(n)   Color-pair number n

       The following macro is the reverse of COLOR_PAIR(n):

       PAIR_NUMBER(attrs) Returns the pair number associated
                          with the COLOR_PAIR(n) attribute.

       The return values of many of these routines are  not  meaningful  (they
       are  implemented  as macro-expanded assignments and simply return their
       argument).  The SVr4 manual page claims (falsely) that  these  routines
       always return 1.

       Note  that  attroff,  wattroff,  attron,  wattron,  attrset,  wattrset,
       standend and standout may be macros.

       All these functions are supported in the XSI Curses standard, Issue  4.
       The  standard  defined the dedicated type for highlights, attr_t, which
       is not defined in SVr4 curses. The functions  taking  attr_t  arguments
       are not supported under SVr4.

       The  XSI  Curses standard states that whether the traditional functions
       attron/attroff/attrset can manipulate attributes  other  than  A_BLINK,
       A_BOLD,  A_DIM, A_REVERSE, A_STANDOUT, or A_UNDERLINE is "unspecified".
       Under this implementation as well as SVr4 curses, these functions  cor-
       rectly  manipulate  all  other  highlights (specifically, A_ALTCHARSET,
       A_PROTECT, and A_INVIS).

       XSI Curses added the new entry  points,  attr_get,  attr_on,  attr_off,
       attr_set,   wattr_on,   wattr_off,  wattr_get,  wattr_set.   These  are
       intended to work with a new series of highlight  macros  prefixed  with

               WA_NORMAL       Normal display (no highlight)
               WA_STANDOUT     Best highlighting mode of the terminal.
               WA_UNDERLINE    Underlining
               WA_REVERSE      Reverse video
               WA_BLINK        Blinking
               WA_DIM          Half bright
               WA_BOLD         Extra bright or bold
               WA_ALTCHARSET   Alternate character set

       The  XSI  curses  standard specifies that each pair of corresponding A_
       and WA_-using functions operates on the same current-highlight informa-

       The XSI standard extended conformance level adds new highlights A_HORI-
       ZONTAL, A_LEFT, A_LOW, A_RIGHT, A_TOP,  A_VERTICAL  (and  corresponding
       WA_ macros for each) which this curses does not yet support.

       curses(3X),     curs_addch(3X),     curs_addstr(3X),     curs_bkgd(3X),