curs_attr(3X)                                       curs_attr(3X)

NAME
       attroff,  wattroff,  attron,  wattron,  attrset, wattrset,
       color_set,  wcolor_set,  standend,  wstandend,   standout,
       wstandout  - curses character and window attribute control
       routines

SYNOPSIS
       #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, void *opts);
       int wattr_set(WINDOW *win, attr_t attrs, 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)

DESCRIPTION
       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  wad-
       dch,  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 standout 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 attributes.

       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 cur-
       rent 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 characters starting at the current cursor  location  of
       stdscr.   It  does not update the cursor and does not per-
       form 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  func-
       tion 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).

   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  mean-
       ingful (they are implemented as macro-expanded assignments
       and simply return their argument).  The SVr4  manual  page
       claims (falsely) that these routines always return 1.

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

PORTABILITY
       All these functions are supported in the XSI Curses  stan-
       dard,  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 sup-
       ported under SVr4.

       The XSI Curses standard states  that  whether  the  tradi-
       tional  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
       correctly  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_.

        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 corre-
       sponding A_ and WA_-using functions operates on  the  same
       current-highlight information.

       The XSI standard extended conformance level adds new high-
       lights A_HORIZONTAL, A_LEFT, A_LOW, A_RIGHT, A_TOP, A_VER-
       TICAL  (and  corresponding WA_ macros for each) which this
       curses does not yet support.

SEE ALSO
       curses(3X),        curs_addch(3X),        curs_addstr(3X),
       curs_printw(3X)

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