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curs_attr(3X)                                                                                  curs_attr(3X)



NAME
       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

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, 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)

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 waddch, waddstr and wprintw.
       Attributes are a property of the character, and move with the character through any scrolling and in-sert/delete insert/delete
       sert/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  at-tron(A_STANDOUT). attron(A_STANDOUT).
       tron(A_STANDOUT).   The  routine standend is the same as attrset(A_NORMAL) or attrset(0), that is, it
       turns off all attributes.

       The attrset and related routines do not affect the attributes used when erasing portions of the  win-dow. window.
       dow.  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 combi-nation combination
       nation described by the color_pair_number. The parameter opts is reserved for  future  use,  applica-tions applications
       tions must supply a null pointer.

       The routine wattr_get returns the current attribute and color pair for the given window; attr_get re-turns returns
       turns the current attribute and color pair for stdscr.  The remaining attr_* functions operate exact-ly exactly
       ly 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 cur-sor cursor
       sor  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).

   Attributes
       The following video attributes, defined in <curses.h>, can be passed to the routines attron, attroff,
       and attrset, or OR'd 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-expand-ed macro-expanded
       ed 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.

       COLOR_PAIR values can only be OR'd with attributes if the pair number is less than 256.   The  alter-nate alternate
       nate  functions such as color_set can pass a color pair value directly.  However, ncurses ABI 4 and 5
       simply OR this value within the alternate functions.  You must use ncurses ABI 6 to support more than
       256 color pairs.

PORTABILITY
       These functions are supported in the XSI Curses standard, Issue 4.  The standard defined the dedicat-ed dedicated
       ed type for highlights, attr_t, which is not defined in SVr4 curses. The functions taking attr_t  ar-guments arguments
       guments are not supported under SVr4.

       The  XSI Curses standard states that whether the traditional functions attron/attroff/attrset can ma-nipulate manipulate
       nipulate attributes other than A_BLINK, A_BOLD, A_DIM, A_REVERSE, A_STANDOUT, or A_UNDERLINE is  "un-specified". "unspecified".
       specified".   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_.

       Older versions of this library did not force an update of the screen when  changing  the  attributes.
       Use touchwin to force the screen to match the updated attributes.


                              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 information.

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

RETURN VALUE
       All routines return the integer OK on success, or ERR on failure.

       X/Open does not define any error conditions.

       This implementation returns an error if the window pointer is null.  The wcolor_set function  returns
       an error if the color pair parameter is outside the range 0..COLOR_PAIRS-1.  This implementation also
       provides getattrs for compatibility with older versions of curses.

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



                                                                                               curs_attr(3X)