ncursesw-morphos/doc/html/man/curs_scr_dump.3x.html
Thomas E. Dickey 58552e8c76 ncurses 6.0 - patch 20170107
+ amend changes for tput to reset tty modes to "sane" if the program
  is run as "reset", like tset.  Likewise, ensure that tset sends
  either reset- or init-strings.
+ improve manual page descriptions of tput init/reset and tset/reset,
  to make it easier to see how they are similar and different.
+ move a static result from key_name() to _nc_globals
+ modify _nc_get_screensize to allow for use_env() and use_tioctl()
  state to be per-screen when sp-funcs are configured, better matching
  the behavior when using the term-driver configuration.
+ improve cross-references in manual pages for often used functions
+ move SCREEN field for use_tioctl() data before the ncursesw fields,
  and limit that to the sp-funcs configuration to improve termlib
  compatibility (cf:  20120714).
+ correct order of initialization for traces in use_env() and
  use_tioctl() versus first trace calls.
2017-01-08 01:40:29 +00:00

137 lines
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<H1 class="no-header">curs_scr_dump 3x</H1>
<PRE>
<STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG> <STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>scr_dump</STRONG>, <STRONG>scr_restore</STRONG>, <STRONG>scr_init</STRONG>, <STRONG>scr_set</STRONG> - read (write) a
<STRONG>curses</STRONG> screen from (to) a file
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
<STRONG>int</STRONG> <STRONG>scr_dump(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
<STRONG>int</STRONG> <STRONG>scr_restore(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
<STRONG>int</STRONG> <STRONG>scr_init(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
<STRONG>int</STRONG> <STRONG>scr_set(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
The <STRONG>scr_dump</STRONG> routine dumps the current contents of the
virtual screen to the file <EM>filename</EM>.
The <STRONG>scr_restore</STRONG> routine sets the virtual screen to the
contents of <EM>filename</EM>, which must have been written using
<STRONG>scr_dump</STRONG>. The next call to <STRONG>doupdate</STRONG> restores the screen
to the way it looked in the dump file.
The <STRONG>scr_init</STRONG> routine reads in the contents of <EM>filename</EM> and
uses them to initialize the <STRONG>curses</STRONG> data structures about
what the terminal currently has on its screen. If the da-
ta is determined to be valid, <STRONG>curses</STRONG> bases its next update
of the screen on this information rather than clearing the
screen and starting from scratch. <STRONG>scr_init</STRONG> is used after
<STRONG>initscr</STRONG> or a <STRONG>system</STRONG> call to share the screen with another
process which has done a <STRONG>scr_dump</STRONG> after its <STRONG><A HREF="curs_initscr.3x.html">endwin(3x)</A></STRONG>
call. The data is declared invalid if the terminfo capa-
bilities <STRONG>rmcup</STRONG> and <STRONG>nrrmc</STRONG> exist; also if the terminal has
been written to since the preceding <STRONG>scr_dump</STRONG> call.
The <STRONG>scr_set</STRONG> routine is a combination of <STRONG>scr_restore</STRONG> and
<STRONG>scr_init</STRONG>. It tells the program that the information in
<EM>filename</EM> is what is currently on the screen, and also what
the program wants on the screen. This can be thought of
as a screen inheritance function.
To read (write) a window from (to) a file, use the <STRONG>getwin</STRONG>
and <STRONG>putwin</STRONG> routines [see <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>].
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG>
upon success.
X/Open defines no error conditions. In this implementa-
tion, each will return an error if the file cannot be
opened.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
Note that <STRONG>scr_init</STRONG>, <STRONG>scr_set</STRONG>, and <STRONG>scr_restore</STRONG> may be
macros.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
The XSI Curses standard, Issue 4, describes these func-
tions (adding the const qualifiers).
The SVr4 docs merely say under <STRONG>scr_init</STRONG> that the dump data
is also considered invalid "if the time-stamp of the tty
is old" but do not define "old".
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>,
<STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>, <STRONG>system(3)</STRONG>
<STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>
</PRE>
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<ul>
<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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