135 lines
5.0 KiB
Plaintext
135 lines
5.0 KiB
Plaintext
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.\"***************************************************************************
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.\" Copyright (c) 2001,2002 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" $Id: curs_add_wch.3x,v 1.4 2002/02/16 22:28:43 tom Exp $
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.TH curs_add_wch 3X ""
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.SH NAME
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\fBadd_wch\fP,
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\fBwadd_wch\fP,
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\fBmvadd_wch\fP,
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\fBmvwadd_wch\fP,
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\fBecho_wchar\fP,
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\fBwecho_wchar\fP - add a complex character and rendition to a \fBcurses\fR window, then advance the cursor
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.SH SYNOPSIS
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.PP
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\fB#include <curses.h>\fP
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.sp
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.B "int add_wch( const cchar_t *\fIwch\fB );"
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.br
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.B "int wadd_wch( WINDOW *\fIwin\fP, const cchar_t *\fIwch\fB );"
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.br
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.B "int mvadd_wch( int \fIy\fP, int \fIx\fP, const cchar_t *\fIwch\fB );"
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.br
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.B "int mvwadd_wch( WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, const cchar_t *\fIwch\fB );"
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.br
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.B "int echo_wchar( const cchar_t *\fIwch\fB );"
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.br
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.B "int wecho_wchar( WINDOW *\fIwin\fP, const cchar_t *\fIwch\fB );"
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.br
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.SH DESCRIPTION
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.PP
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The
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\fBadd_wch\fP,
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\fBwadd_wch\fP,
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\fBmvadd_wch\fP, and
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\fBmvwadd_wch\fP
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functions put the complex character \fIwch\fP into the given
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window at its current position,
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which is then advanced.
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These functions perform
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wrapping and special-character processing as follows:
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.TP 5
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-
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If \fIwch\fP refers to a spacing character,
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then any previous character at that location is removed.
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A new character specified by \fIwch\fP is
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placed at that location with rendition specified by \fIwch\fP.
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The cursor then advances to
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the next spacing character on the screen.
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.TP 5
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-
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If \fIwch\fP refers to a non-spacing character,
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all previous characters at that location are preserved.
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The non-spacing characters of \fIwch\fP
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are added to the spacing complex character,
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and the rendition specified by \fIwch\fP is ignored.
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.TP 5
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-
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If the character part of \fIwch\fP is
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a tab, newline, backspace or other control character,
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the window is updated and the cursor moves as if \fBaddch\fR(3X) were called.
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.PP
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The \fBecho_wchar\fP
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function is functionally equivalent to a call to
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\fBadd_wch\fP
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followed by a call to
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\fBrefresh\fP.
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Similarly, the
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\fBwecho_wchar\fP
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is functionally equivalent to a call to
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\fBwadd_wch\fP
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followed by a call to
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\fBwrefresh\fP.
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The knowledge
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that only a single character is being output is taken into consideration and,
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for non-control characters, a considerable performance gain might be seen
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by using the *\fBecho\fP* functions instead of their equivalents.
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.SH RETURN VALUES
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.PP
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All routines return the integer \fBERR\fR upon failure and \fBOK\fR on success.
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.SH NOTES
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.PP
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Note that
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\fBadd_wch\fP,
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\fBmvadd_wch\fP,
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\fBmvwadd_wch\fP, and
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\fBecho_wchar\fP
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may be macros.
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.SH PORTABILITY
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.PP
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All these functions are described in the XSI Curses standard, Issue 4.
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The defaults specified for forms-drawing characters apply in the POSIX locale.
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.PP
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XSI documents constants beginning with \fBWACS_\fP which are used for
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line-drawing.
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Those are not currently implemented in \fBncurses\fP.
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.SH SEE ALSO
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.PP
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\fBcurses\fR(3X),
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\fBcurs_attr_get\fR(3X),
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\fBcurs_clear\fR(3X),
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\fBcurs_outopts\fR(3X),
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\fBcurs_refresh\fR(3X),
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\fBputwc\fR(3)
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.\"#
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.\"# The following sets edit modes for GNU EMACS
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.\"# Local Variables:
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.\"# mode:nroff
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.\"# fill-column:79
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.\"# End:
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