-</PRE>
-<H2>DESCRIPTION</H2><PRE>
- The following routines give low-level access to various
- <STRONG>curses</STRONG> capabilities. These routines typically are used
- inside library routines.
-
- The <STRONG>def_prog_mode</STRONG> and <STRONG>def_shell_mode</STRONG> routines save the
- current terminal modes as the "program" (in <STRONG>curses</STRONG>) or
- "shell" (not in <STRONG>curses</STRONG>) state for use by the <STRONG>re-</STRONG>
- <STRONG>set_prog_mode</STRONG> and <STRONG>reset_shell_mode</STRONG> routines. This is done
- automatically by <STRONG>initscr</STRONG>. There is one such save area for
- each screen context allocated by <STRONG>newterm()</STRONG>.
-
- The <STRONG>reset_prog_mode</STRONG> and <STRONG>reset_shell_mode</STRONG> routines restore
- the terminal to "program" (in <STRONG>curses</STRONG>) or "shell" (out of
- <STRONG>curses</STRONG>) state. These are done automatically by <STRONG>endwin</STRONG>
- and, after an <STRONG>endwin</STRONG>, by <STRONG>doupdate</STRONG>, so they normally are
- not called.
-
- The <STRONG>resetty</STRONG> and <STRONG>savetty</STRONG> routines save and restore the
- state of the terminal modes. <STRONG>savetty</STRONG> saves the current
- state in a buffer and <STRONG>resetty</STRONG> restores the state to what
- it was at the last call to <STRONG>savetty</STRONG>.
-
- The <STRONG>getsyx</STRONG> routine returns the current coordinates of the
- virtual screen cursor in <EM>y</EM> and <EM>x</EM>. If <STRONG>leaveok</STRONG> is currently
- <STRONG>TRUE</STRONG>, then <STRONG>-1</STRONG>,<STRONG>-1</STRONG> is returned. If lines have been removed
- from the top of the screen, using <STRONG>ripoffline</STRONG>, <EM>y</EM> and <EM>x</EM> in-
- clude these lines; therefore, <EM>y</EM> and <EM>x</EM> should be used only
- as arguments for <STRONG>setsyx</STRONG>.
-
- The <STRONG>setsyx</STRONG> routine sets the virtual screen cursor to <EM>y</EM>, <EM>x</EM>.
- If <EM>y</EM> and <EM>x</EM> are both <STRONG>-1</STRONG>, then <STRONG>leaveok</STRONG> is set. The two rou-
- tines <STRONG>getsyx</STRONG> and <STRONG>setsyx</STRONG> are designed to be used by a li-
- brary routine, which manipulates <STRONG>curses</STRONG> windows but does
- not want to change the current position of the program's
- cursor. The library routine would call <STRONG>getsyx</STRONG> at the be-
- ginning, do its manipulation of its own windows, do a
- <STRONG>wnoutrefresh</STRONG> on its windows, call <STRONG>setsyx</STRONG>, and then call
- <STRONG>doupdate</STRONG>.
-
- The <STRONG>ripoffline</STRONG> routine provides access to the same facili-
- ty that <STRONG>slk_init</STRONG> [see <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>] uses to reduce the
- size of the screen. <STRONG>ripoffline</STRONG> must be called before
- <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG> is called. If <EM>line</EM> is positive, a line
- is removed from the top of <STRONG>stdscr</STRONG>; if <EM>line</EM> is negative, a
- line is removed from the bottom. When this is done inside
- <STRONG>initscr</STRONG>, the routine <STRONG>init</STRONG> (supplied by the user) is called
- with two arguments: a window pointer to the one-line win-
- dow that has been allocated and an integer with the number
- of columns in the window. Inside this initialization rou-
- tine, the integer variables <STRONG>LINES</STRONG> and <STRONG>COLS</STRONG> (defined in
- <STRONG><curses.h></STRONG>) are not guaranteed to be accurate and <STRONG>wrefresh</STRONG>
- or <STRONG>doupdate</STRONG> must not be called. It is allowable to call
- <STRONG>wnoutrefresh</STRONG> during the initialization routine.
-
- <STRONG>ripoffline</STRONG> can be called up to five times before calling
- <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG>.
-
- The <STRONG>curs_set</STRONG> routine sets the cursor state to invisible,
- normal, or very visible for <STRONG>visibility</STRONG> equal to <STRONG>0</STRONG>, <STRONG>1</STRONG>, or <STRONG>2</STRONG>
- respectively. If the terminal supports the <EM>visibility</EM> re-
- quested, the previous <EM>cursor</EM> state is returned; otherwise,
- <STRONG>ERR</STRONG> is returned.