ncurses 5.9 - patch 20111217

[ncurses.git] / man / default_colors.3x

diff --git a/man/default_colors.3x b/man/default_colors.3x
index ae07899dcbfc52e8623fabbb2a80766db4a96735..0b85598eea459873a301b298d4098d62a8eacd5e 100644 (file)
--- a/man/default_colors.3x
+++ b/man/default_colors.3x
@@ -1,5 +1,5 @@
 .\"***************************************************************************
 .\"***************************************************************************

-.\" Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
+.\" Copyright (c) 1998-2010,2011 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            *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *


@@ -26,16 +26,16 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"

-.\" Author: Thomas E. Dickey 1997,1999,2000
+.\" Author: Thomas E. Dickey 1997,1999,2000,2005

 .\"
 .\"

-.\" $Id: default_colors.3x,v 1.17 2003/10/25 20:41:08 tom Exp $
+.\" $Id: default_colors.3x,v 1.23 2011/01/03 21:52:27 Tim.van.der.Molen Exp $

 .TH default_colors 3X ""
 .SH NAME
 \fBuse_default_colors\fR,
 \fBassume_default_colors\fR \- use terminal's default colors
 .SH SYNOPSIS
 \fB#include <curses.h>\fP
 .TH default_colors 3X ""
 .SH NAME
 \fBuse_default_colors\fR,
 \fBassume_default_colors\fR \- use terminal's default colors
 .SH SYNOPSIS
 \fB#include <curses.h>\fP

-
+.sp

 \fBint use_default_colors(void);\fP
 .br
 \fBint assume_default_colors(int fg, int bg);\fP
 \fBint use_default_colors(void);\fP
 .br
 \fBint assume_default_colors(int fg, int bg);\fP


@@ -64,14 +64,14 @@ visual effects.
 The first function,
 .I use_default_colors()
 tells the curses library to assign terminal default
 The first function,
 .I use_default_colors()
 tells the curses library to assign terminal default

-foreground/background colors to color number -1. So init_pair(x,COLOR_RED,-1)
-will initialize pair x as red on default background and init_pair(x,-1,COLOR_BLUE) will
+foreground/background colors to color number \-1. So init_pair(x,COLOR_RED,\-1)
+will initialize pair x as red on default background and init_pair(x,\-1,COLOR_BLUE) will

 initialize pair x as default foreground on blue.
 .PP
 The other,
 .I assume_default_colors()
 is a refinement which tells which colors to paint for color pair 0.
 initialize pair x as default foreground on blue.
 .PP
 The other,
 .I assume_default_colors()
 is a refinement which tells which colors to paint for color pair 0.

-This function recognizes a special color number -1,
+This function recognizes a special color number \-1,

 which denotes the default terminal color.
 .PP
 The following are equivalent:
 which denotes the default terminal color.
 .PP
 The following are equivalent:


@@ -79,12 +79,12 @@ The following are equivalent:
 .br
 .I use_default_colors();
 .br
 .br
 .I use_default_colors();
 .br

-.I assume_default_colors(-1,-1);
+.I assume_default_colors(\-1,\-1);

 .RE
 .PP
 These are ncurses extensions.
 For other curses implementations, color
 .RE
 .PP
 These are ncurses extensions.
 For other curses implementations, color

-number -1 does not mean anything, just as for ncurses before a
+number \-1 does not mean anything, just as for ncurses before a

 successful call of \fIuse_default_colors()\fP or \fIassume_default_colors()\fP.
 .PP
 Other curses implementations do not allow an application to modify color pair 0.
 successful call of \fIuse_default_colors()\fP or \fIassume_default_colors()\fP.
 .PP
 Other curses implementations do not allow an application to modify color pair 0.


@@ -101,12 +101,31 @@ for color pair 0.
 These functions return the integer \fBERR\fP upon failure and \fBOK\fP on success.
 They will fail if either the terminal does not support
 the \fIorig_pair\fP or \fIorig_colors\fP capability.
 These functions return the integer \fBERR\fP upon failure and \fBOK\fP on success.
 They will fail if either the terminal does not support
 the \fIorig_pair\fP or \fIorig_colors\fP capability.

-If the \fIinitialize_pair\fP capability is found, this causes an
+If the \fIinitialize_pair\fP capability is not found, this causes an

 error as well.
 .SH NOTES
 error as well.
 .SH NOTES

-Associated with this extension, the \fBinit_pair\fR(3X) function accepts
-negative arguments to specify default foreground or background
-colors.
+Associated with this extension, the \fBinit_pair\fR function accepts
+negative arguments to specify default foreground or background colors.
+.PP
+The \fIuse_default_colors()\fP function was added to support \fIded\fP.
+This is a full-screen application which uses curses to manage only part
+of the screen.  The bottom portion of the screen, which is of adjustable
+size, is left uncolored to display the results from shell commands.
+The top portion of the screen colors filenames using a scheme like the
+"color ls" programs.
+Attempting to manage the background color of the screen for this application
+would give unsatisfactory results for a variety of reasons.
+This extension was devised after
+noting that color xterm (and similar programs) provides a background color
+which does not necessarily correspond to any of the ANSI colors.
+While a special terminfo entry could be constructed using nine colors,
+there was no mechanism provided within curses to account for the related
+\fIorig_pair\fP and \fIback_color_erase\fP capabilities.
+.PP
+The \fIassume_default_colors()\fP function was added to solve
+a different problem: support for applications which would use
+environment variables and other configuration to bypass curses'
+notion of the terminal's default colors, setting specific values.

 .SH PORTABILITY
 These routines are specific to ncurses.  They were not supported on
 Version 7, BSD or System V implementations.  It is recommended that
 .SH PORTABILITY
 These routines are specific to ncurses.  They were not supported on
 Version 7, BSD or System V implementations.  It is recommended that


@@ -117,9 +136,3 @@ any code depending on them be conditioned using NCURSES_VERSION.
 .SH AUTHOR
 Thomas Dickey (from an analysis of the requirements for color xterm
 for XFree86 3.1.2C, February 1996).
 .SH AUTHOR
 Thomas Dickey (from an analysis of the requirements for color xterm
 for XFree86 3.1.2C, February 1996).

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