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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 opera-
       tions.  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 at-
       tributes  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 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 de-
       scribed 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  corre-
       sponding 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 loca-
       tion 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_col-
       or(3X)).  The opts argument is not presently used, but is reserved for the future (leave it NULL).

       The following video attributes, defined in <curses.h>, can be passed to the routines attron, attroff,  and  at-
       trset, 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-expanded assign-
       ments and simply return their argument).  The SVr4 manual page claims (falsely) that these routines always  re-
       turn 1.

       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 alternate func-
       tions such as color_set can pass a color pair value directly.  However, ncurses ABI 4 and 5 simply OR this val-
       ue within the alternate functions.  You must use ncurses ABI 6 to support more than 256 color pairs.

       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 support-
       ed under SVr4.

       The XSI Curses standard states that whether the traditional functions attron/attroff/attrset can manipulate at-
       tributes 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,

       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 touch-
       win 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 support.

       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.

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