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| .\" Copyright 2018-2021,2022 Thomas E. Dickey * |
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| .\" $Id: curs_deleteln.3x,v 1.20 2022/02/12 20:06:41 tom Exp $ |
| .TH curs_deleteln 3X "" |
| .SH NAME |
| \fBdeleteln\fP, |
| \fBwdeleteln\fP, |
| \fBinsdelln\fP, |
| \fBwinsdelln\fP, |
| \fBinsertln\fP, |
| \fBwinsertln\fP \- delete and insert lines in a \fBcurses\fP window |
| .SH SYNOPSIS |
| \fB#include <curses.h>\fP |
| .sp |
| \fBint deleteln(void);\fP |
| .br |
| \fBint wdeleteln(WINDOW *\fIwin\fB);\fR |
| .sp |
| \fBint insdelln(int \fIn\fB);\fR |
| .br |
| \fBint winsdelln(WINDOW *\fIwin\fB, int \fIn\fB);\fR |
| .sp |
| \fBint insertln(void);\fP |
| .br |
| \fBint winsertln(WINDOW *\fIwin\fB);\fR |
| .br |
| .SH DESCRIPTION |
| The \fBdeleteln\fP and \fBwdeleteln\fP routines delete the line under the |
| cursor in the window; all lines below the current line are moved up one line. |
| The bottom line of the window is cleared. |
| The cursor position does not change. |
| .PP |
| The \fBinsdelln\fP and \fBwinsdelln\fP routines, for positive \fIn\fP, insert |
| \fIn\fP lines into the specified window above the current line. |
| The \fIn\fP |
| bottom lines are lost. |
| For negative \fIn\fP, delete \fIn\fP lines (starting |
| with the one under the cursor), and move the remaining lines up. |
| The bottom |
| \fIn\fP lines are cleared. |
| The current cursor position remains the same. |
| .PP |
| The \fBinsertln\fP and \fBwinsertln\fP routines insert a blank line above the |
| current line and the bottom line is lost. |
| .SH RETURN VALUE |
| All routines return the integer \fBERR\fP upon failure and an \fBOK\fP (SVr4 |
| specifies only "an integer value other than \fBERR\fP") upon successful |
| completion. |
| .PP |
| X/Open defines no error conditions. |
| In this implementation, |
| if the window parameter is null, an error is returned. |
| .SH PORTABILITY |
| These functions are described in the XSI Curses standard, Issue 4. |
| The |
| standard specifies that they return \fBERR\fP on failure, but specifies no |
| error conditions. |
| .SH NOTES |
| Note that all but \fBwinsdelln\fP may be macros. |
| .PP |
| These routines do not require a hardware line delete or insert feature in the |
| terminal. |
| In fact, they will not use hardware line delete/insert unless |
| \fBidlok(..., TRUE)\fP has been set on the current window. |
| .SH SEE ALSO |
| \fBcurses\fP(3X) |