.\"***************************************************************************
-.\" Copyright (c) 1998-2005,2010 Free Software Foundation, Inc. *
+.\" Copyright (c) 1998-2016,2017 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_kernel.3x,v 1.18 2010/10/02 23:20:13 tom Exp $
+.\" $Id: curs_kernel.3x,v 1.22 2017/01/07 19:25:15 tom Exp $
+.de bP
+.IP \(bu 4
+..
.TH curs_kernel 3X ""
.na
.hy 0
.br
\fBint savetty(void);\fR
.br
-\fBvoid getsyx(int y, int x);\fR
+\fBvoid getsyx(int \fP\fIy\fP\fB, int \fP\fIx\fP\fB);\fR
.br
-\fBvoid setsyx(int y, int x);\fR
+\fBvoid setsyx(int \fP\fIy\fP\fB, int \fP\fIx\fP\fB);\fR
.br
-\fBint ripoffline(int line, int (*init)(WINDOW *, int));\fR
+\fBint ripoffline(int \fP\fIline\fP\fB, int (*\fP\fIinit\fP\fB)(WINDOW *, int));\fR
.br
-\fBint curs_set(int visibility);\fR
+\fBint curs_set(int \fP\fIvisibility\fP\fB);\fR
.br
-\fBint napms(int ms);\fR
+\fBint napms(int \fP\fIms\fP\fB);\fR
.br
.SH DESCRIPTION
The following routines give low-level access to various \fBcurses\fR
capabilities. These routines typically are used inside library
routines.
+.SS def_prog_mode, def_shell_mode
.PP
The \fBdef_prog_mode\fR and \fBdef_shell_mode\fR routines save the
current terminal modes as the "program" (in \fBcurses\fR) or "shell"
(not in \fBcurses\fR) state for use by the \fBreset_prog_mode\fR and
\fBreset_shell_mode\fR routines. This is done automatically by
\fBinitscr\fR. There is one such save area for each screen context
-allocated by \fBnewterm()\fR.
+allocated by \fBnewterm\fR.
+.SS reset_prog_mode, reset_shell_mode
.PP
The \fBreset_prog_mode\fR and \fBreset_shell_mode\fR routines restore
the terminal to "program" (in \fBcurses\fR) or "shell" (out of
-\fBcurses\fR) state. These are done automatically by \fBendwin\fR
+\fBcurses\fR) state. These are done automatically by \fBendwin\fR(3X)
and, after an \fBendwin\fR, by \fBdoupdate\fR, so they normally are
not called.
+.SS resetty, savetty
.PP
The \fBresetty\fR and \fBsavetty\fR routines save and restore the
state of the terminal modes. \fBsavetty\fR saves the current state in
a buffer and \fBresetty\fR restores the state to what it was at the
last call to \fBsavetty\fR.
+.SS getsyx
.PP
The \fBgetsyx\fR routine returns the current coordinates of the virtual screen
cursor in \fIy\fR and \fIx\fR. If \fBleaveok\fR is currently \fBTRUE\fR, then
screen, using \fBripoffline\fR, \fIy\fR and \fIx\fR include these lines;
therefore, \fIy\fR and \fIx\fR should be used only as arguments for
\fBsetsyx\fR.
+.SS setsyx
.PP
The \fBsetsyx\fR routine sets the virtual screen cursor to
\fIy\fR, \fIx\fR. If \fIy\fR and \fIx\fR are both \fB\-1\fR, then
at the beginning, do its manipulation of its own windows, do a
\fBwnoutrefresh\fR on its windows, call \fBsetsyx\fR, and then call
\fBdoupdate\fR.
+.SS ripoffline
.PP
The \fBripoffline\fR routine provides access to the same facility that
\fBslk_init\fR [see \fBcurs_slk\fR(3X)] uses to reduce the size of the
screen. \fBripoffline\fR must be called before \fBinitscr\fR or
-\fBnewterm\fR is called. If \fIline\fR is positive, a line is removed
-from the top of \fBstdscr\fR; if \fIline\fR is negative, a line is
-removed from the bottom. When this is done inside \fBinitscr\fR, the
+\fBnewterm\fR is called, to prepare these initial actions:
+.bP
+If \fIline\fR is positive, a line is removed from the top of \fBstdscr\fR.
+.bP
+if \fIline\fR is negative, a line is removed from the bottom.
+.PP
+When the resulting initialization is done inside \fBinitscr\fR, the
routine \fBinit\fR (supplied by the user) is called with two
-arguments: a window pointer to the one-line window that has been
-allocated and an integer with the number of columns in the window.
+arguments:
+.bP
+a window pointer to the one-line window that has been
+allocated and
+.bP
+an integer with the number of columns in the window.
+.PP
Inside this initialization routine, the integer variables \fBLINES\fR
and \fBCOLS\fR (defined in \fB<curses.h>\fR) are not guaranteed to be
accurate and \fBwrefresh\fR or \fBdoupdate\fR must not be called. It
.PP
\fBripoffline\fR can be called up to five times before calling \fBinitscr\fR or
\fBnewterm\fR.
+.SS curs_set
.PP
The \fBcurs_set\fR routine sets the cursor state to invisible,
normal, or very visible for \fBvisibility\fR equal to \fB0\fR,
\fB1\fR, or \fB2\fR respectively. If the terminal supports the
\fIvisibility\fR requested, the previous \fIcursor\fR state is
returned; otherwise, \fBERR\fR is returned.
+.SS napms
.PP
The \fBnapms\fR routine is used to sleep for \fIms\fR milliseconds.
.SH RETURN VALUE
.PP
X/Open defines no error conditions.
In this implementation
-.RS
.TP 5
+.na
+.hy 0
\fBdef_prog_mode\fR, \fBdef_shell_mode\fR, \fBreset_prog_mode\fR, \fBreset_shell_mode\fR
+.hy
+.ad
return an error
if the terminal was not initialized, or
if the I/O call to obtain the terminal settings fails.
\fBripoffline\fP
returns an error if the maximum number of ripped-off lines
exceeds the maximum (NRIPS = 5).
-.RE
.SH NOTES
Note that \fBgetsyx\fR is a macro, so \fB&\fR is not necessary before
the variables \fIy\fR and \fIx\fR.
\fBcurs_scr_dump\fR(3X),
\fBcurs_slk\fR(3X),
\fBcurs_variables\fR(3X).
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End:
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