'\" t
.\"***************************************************************************
-.\" Copyright (c) 1998,2000 Free Software Foundation, Inc. *
+.\" Copyright (c) 1998-2009,2010 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_attr.3x,v 1.22 2000/07/08 11:59:58 tom Exp $
+.\" $Id: curs_attr.3x,v 1.33 2010/07/31 16:12:01 tom Exp $
.TH curs_attr 3X ""
+.na
+.hy 0
.SH NAME
-\fBattroff\fR, \fBwattroff\fR, \fBattron\fR, \fBwattron\fR,
-\fBattrset\fR, \fBwattrset\fR, \fBcolor_set\fR, \fBwcolor_set\fR,
-\fBstandend\fR, \fBwstandend\fR, \fBstandout\fR, \fBwstandout\fR,
-\fBattr_get\fR, \fBwattr_get\fR,
-\fBattr_off\fR, \fBwattr_off\fR,
-\fBattr_on\fR, \fBwattr_on\fR,
-\fBattr_set\fR, \fBwattr_set\fR,
-\fBchgat\fR, \fBwchgat\fR,
-\fBmvchgat\fR, \fBmvwchgat\fR,
-\fBPAIR_NUMBER\fR - \fBcurses\fR character and window attribute control routines
+\fBattroff\fR,
+\fBwattroff\fR,
+\fBattron\fR,
+\fBwattron\fR,
+\fBattrset\fR,
+\fBwattrset\fR,
+\fBcolor_set\fR,
+\fBwcolor_set\fR,
+\fBstandend\fR,
+\fBwstandend\fR,
+\fBstandout\fR,
+\fBwstandout\fR,
+\fBattr_get\fR,
+\fBwattr_get\fR,
+\fBattr_off\fR,
+\fBwattr_off\fR,
+\fBattr_on\fR,
+\fBwattr_on\fR,
+\fBattr_set\fR,
+\fBwattr_set\fR,
+\fBchgat\fR,
+\fBwchgat\fR,
+\fBmvchgat\fR,
+\fBmvwchgat\fR,
+\fBPAIR_NUMBER\fR \- \fBcurses\fR character and window attribute control routines
+.ad
+.hy
.SH SYNOPSIS
\fB#include <curses.h>\fR
.br
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.
-
+.PP
The routine \fBattrset\fR sets the current attributes of the given window to
\fIattrs\fR. The routine \fBattroff\fR turns off the named attributes without
turning any other attributes on or off. The routine \fBattron\fR turns on the
the same as \fBattron(A_STANDOUT)\fR. The routine \fBstandend\fR is the same
as \fBattrset(A_NORMAL)\fR or \fBattrset(0)\fR, that is, it turns off all
attributes.
-
+.PP
+The \fBattrset\fR and related routines do not affect the attributes used
+when erasing portions of the window.
+See \fBcurs_bkgd\fR(3X) for functions which modify the attributes used for
+erasing and clearing.
+.PP
The routine \fBcolor_set\fR 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.
-
+.PP
The routine \fBwattr_get\fR returns the current attribute and color pair for
the given window; \fBattr_get\fR returns the current attribute and color pair
for \fBstdscr\fR.
The remaining \fBattr_\fR* functions operate exactly like the corresponding
\fBattr\fR* functions, except that they take arguments of type \fBattr_t\fR
rather than \fBint\fR.
-
+.PP
The routine \fBchgat\fR changes the attributes of a given number of characters
starting at the current cursor location of \fBstdscr\fR. It does not update
-the cursor and does not perform wrapping. A character count of -1 or greater
+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 \fBwchgat\fR function generalizes this to any
window; the \fBmvwchgat\fR function does a cursor move before acting. In these
presently used, but is reserved for the future (leave it \fBNULL\fR).
.SS Attributes
The following video attributes, defined in \fB<curses.h>\fR, can be passed to
-the routines \fBattron\fR, \fBattroff\fR, and \fBattrset\fR, or OR'ed with the
+the routines \fBattron\fR, \fBattroff\fR, and \fBattrset\fR, or OR'd with the
characters passed to \fBaddch\fR.
-
+.PP
.TS
center ;
l l .
\fBA_CHARTEXT\fR Bit-mask to extract a character
\fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR Color-pair number \fIn\fR
.TE
-
+.PP
The following macro is the reverse of \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR:
-
-.DS C
+.PP
+.br
\fBPAIR_NUMBER(\fR\fIattrs\fR) Returns the pair number associated
with the \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR attribute.
-.DE
-
+.br
+.PP
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 \fB1\fR.
-
.SH NOTES
Note that \fBattroff\fR, \fBwattroff\fR, \fBattron\fR, \fBwattron\fR,
\fBattrset\fR, \fBwattrset\fR, \fBstandend\fR and \fBstandout\fR may be macros.
+.PP
+\fBCOLOR_PAIR\fP values can only be OR'd with attributes if the pair
+number is less than 256.
+The alternate functions such as \fBcolor_set\fP 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.
.SH PORTABILITY
-All these functions are supported in the XSI Curses standard, Issue 4. The
+These functions are supported in the XSI Curses standard, Issue 4. The
standard defined the dedicated type for highlights, \fBattr_t\fR, which is not
defined in SVr4 curses. The functions taking \fBattr_t\fR arguments are
not supported under SVr4.
-
+.PP
The XSI Curses standard states that whether the traditional functions
\fBattron\fR/\fBattroff\fR/\fBattrset\fR can manipulate attributes other than
\fBA_BLINK\fR, \fBA_BOLD\fR, \fBA_DIM\fR, \fBA_REVERSE\fR, \fBA_STANDOUT\fR, or
\fBA_UNDERLINE\fR is "unspecified". Under this implementation as well as
SVr4 curses, these functions correctly manipulate all other highlights
(specifically, \fBA_ALTCHARSET\fR, \fBA_PROTECT\fR, and \fBA_INVIS\fR).
-
+.PP
XSI Curses added the new entry points, \fBattr_get\fR, \fBattr_on\fR,
\fBattr_off\fR, \fBattr_set\fR, \fBwattr_on\fR, \fBwattr_off\fR,
\fBwattr_get\fR, \fBwattr_set\fR. These are intended to work with
a new series of highlight macros prefixed with \fBWA_\fR.
-
+.PP
+Older versions of this library did not force an update of the screen
+when changing the attributes.
+Use \fBtouchwin\fR to force the screen to match the updated attributes.
+.PP
+.ne 9
.TS
center ;
l l .
\fBWA_BOLD\fR Extra bright or bold
\fBWA_ALTCHARSET\fR Alternate character set
.TE
-
+.PP
The XSI curses standard specifies that each pair of corresponding \fBA_\fR
and \fBWA_\fR-using functions operates on the same current-highlight
information.
-
+.PP
The XSI standard extended conformance level adds new highlights
\fBA_HORIZONTAL\fR, \fBA_LEFT\fR, \fBA_LOW\fR, \fBA_RIGHT\fR, \fBA_TOP\fR,
\fBA_VERTICAL\fR (and corresponding \fBWA_\fR macros for each) which this
-curses does not yet support.
+implementation does not yet support.
+.SH RETURN VALUE
+All routines return the integer \fBOK\fR on success, or \fBERR\fP on failure.
+.PP
+X/Open does not define any error conditions.
+.PP
+This implementation returns an error
+if the window pointer is null.
+The \fBwcolor_set\fP function returns an error if the color pair parameter
+is outside the range 0..COLOR_PAIRS\-1.
+This implementation also provides
+\fBgetattrs\fR
+for compatibility with older versions of curses.
.SH SEE ALSO
-\fBcurses\fR(3X), \fBcurs_addch\fR(3X), \fBcurs_addstr\fR(3X),
+\fBcurses\fR(3X),
+\fBcurs_addch\fR(3X),
+\fBcurs_addstr\fR(3X),
+\fBcurs_bkgd\fR(3X),
\fBcurs_printw\fR(3X)
.\"#
.\"# The following sets edit modes for GNU EMACS
projects / ncurses.git / blobdiff