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-<H1 class="no-header">user_caps 5 2023-10-07 ncurses 6.4 File formats</H1>
+<H1 class="no-header">user_caps 5 2023-12-16 ncurses 6.4 File formats</H1>
<PRE>
<STRONG><A HREF="user_caps.5.html">user_caps(5)</A></STRONG> File formats <STRONG><A HREF="user_caps.5.html">user_caps(5)</A></STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
</PRE><H3><a name="h3-Background">Background</a></H3><PRE>
- Before ncurses 5.0, terminfo databases used a <EM>fixed</EM> <EM>repertoire</EM> of
+ Before <EM>ncurses</EM> 5.0, terminfo databases used a <EM>fixed</EM> <EM>repertoire</EM> of
terminal capabilities designed for the SVr2 terminal database in 1984,
and extended in stages through SVr4 (1989), and standardized in the
Single Unix Specification beginning in 1995.
needed, while others were added (out of order) to comply with
X/Open Curses.
- While ncurses' repertoire of predefined capabilities is closest to
+ While <EM>ncurses</EM>' repertoire of predefined capabilities is closest to
Solaris, Solaris's terminfo database has a few differences from the
- list published by X/Open Curses. For example, ncurses can be
+ list published by X/Open Curses. For example, <EM>ncurses</EM> can be
configured with tables which match the terminal databases for AIX,
HP-UX or OSF/1, rather than the default Solaris-like configuration.
- <STRONG>o</STRONG> In SVr4 curses and ncurses, the terminal database is defined at
+ <STRONG>o</STRONG> In SVr4 curses and <EM>ncurses</EM>, the terminal database is defined at
compile-time using a text file which lists the different terminal
capabilities.
In principle, the text-file can be extended, but doing this
requires recompiling and reinstalling the library. The text-file
- used in ncurses for terminal capabilities includes details for
+ used in <EM>ncurses</EM> for terminal capabilities includes details for
various systems past the documented X/Open Curses features. For
- example, ncurses supports these capabilities in each configuration:
+ example, <EM>ncurses</EM> supports these capabilities in each configuration:
memory_lock
(meml) lock memory above cursor
Although termcap's extensibility was rarely used (it was never the
<EM>speaker</EM> who had actually used the feature), the criticism had a point.
- ncurses 5.0 provided a way to detect nonstandard capabilities,
+ <EM>ncurses</EM> 5.0 provided a way to detect nonstandard capabilities,
determine their type and optionally store and retrieve them in a way
which did not interfere with other applications. These are referred to
as <EM>user-defined</EM> <EM>capabilities</EM> because no modifications to the toolset's
predefined capability names are needed.
- The ncurses utilities <STRONG>tic</STRONG> and <STRONG>infocmp</STRONG> have a command-line option "-x"
+ The <EM>ncurses</EM> utilities <STRONG>tic</STRONG> and <STRONG>infocmp</STRONG> have a command-line option "-x"
to control whether the nonstandard capabilities are stored or
retrieved. A library function <STRONG>use_extended_names</STRONG> is provided for the
same purpose.
user-defined capability if the capability name is not one of the
predefined names.
- Because ncurses provides a termcap library interface, these user-
+ Because <EM>ncurses</EM> provides a termcap library interface, these user-
defined capabilities may be visible to termcap applications:
<STRONG>o</STRONG> The termcap interface (like all implementations of termcap)
predefined function-key names, to which a series of keys can be
assigned, that is insufficient for more than a dozen keys
multiplied by more than a couple of modifier combinations. The
- ncurses database uses a convention based on <STRONG>xterm(1)</STRONG> to provide
+ <EM>ncurses</EM> database uses a convention based on <STRONG>xterm(1)</STRONG> to provide
extended special-key names.
Fitting that into termcap's limitation of 2-character names would
</PRE><H3><a name="h3-Recognized-capabilities">Recognized capabilities</a></H3><PRE>
- The ncurses library uses the user-definable capabilities. While the
- terminfo database may have other extensions, ncurses makes explicit
+ The <EM>ncurses</EM> library uses the user-definable capabilities. While the
+ terminfo database may have other extensions, <EM>ncurses</EM> makes explicit
checks for these:
AX <EM>boolean</EM>, asserts that the terminal interprets SGR 39 and SGR 49
The command "<STRONG>tput</STRONG> <STRONG>clear</STRONG>" does the same thing.
NQ <EM>boolean</EM>, used to suppress a consistency check in tic for the
- ncurses capabilities in user6 through user9 (u6, u7, u8 and u9)
+ <EM>ncurses</EM> capabilities in user6 through user9 (u6, u7, u8 and u9)
which tell how to query the terminal's cursor position and its
device attributes.
appropriate values without requiring the application to
initialize colors using <STRONG>init_color</STRONG>.
- The capability type determines the values which ncurses sees:
+ The capability type determines the values which <EM>ncurses</EM> sees:
<EM>boolean</EM>
implies that the number of bits for red, green and blue are
- the same. Using the maximum number of colors, ncurses adds
+ the same. Using the maximum number of colors, <EM>ncurses</EM> adds
two, divides that sum by three, and assigns the result to red,
green and blue in that order.
comparison to red.
<EM>number</EM>
- tells ncurses what result to add to red, green and blue. If
- ncurses runs out of bits, blue (and green) lose just as in the
+ tells <EM>ncurses</EM> what result to add to red, green and blue. If
+ <EM>ncurses</EM> runs out of bits, blue (and green) lose just as in the
<EM>boolean</EM> case.
<EM>string</EM>
could define <STRONG>RGB#1</STRONG> to represent the standard eight ANSI colors,
i.e., one bit per color.
- U8 <EM>number</EM>, asserts that ncurses must use Unicode values for line-
+ U8 <EM>number</EM>, asserts that <EM>ncurses</EM> must use Unicode values for line-
drawing characters, and that it should ignore the alternate
character set capabilities when the locale uses UTF-8 encoding.
For more information, see the discussion of <STRONG>NCURSES_NO_UTF8_ACS</STRONG>
Set this capability to a nonzero value to enable it.
- XM <EM>string</EM>, override ncurses's built-in string which enables/disables
+ XM <EM>string</EM>, override <EM>ncurses</EM>'s built-in string which enables/disables
<STRONG>xterm(1)</STRONG> mouse mode.
- ncurses sends a character sequence to the terminal to initialize
+ <EM>ncurses</EM> sends a character sequence to the terminal to initialize
mouse mode, and when the user clicks the mouse buttons or (in
certain modes) moves the mouse, handles the characters sent back
by the terminal to tell it what was done with the mouse.
The mouse protocol is enabled when the <EM>mask</EM> passed in the
- <STRONG>mousemask</STRONG> function is nonzero. By default, ncurses handles the
+ <STRONG>mousemask</STRONG> function is nonzero. By default, <EM>ncurses</EM> handles the
responses for the X11 xterm mouse protocol. It also knows about
the <EM>SGR</EM> <EM>1006</EM> xterm mouse protocol, but must to be told to look
for this specifically. It will not be able to guess which mode
The <STRONG>XM</STRONG> capability has a single parameter. If nonzero, the mouse
protocol should be enabled. If zero, the mouse protocol should
- be disabled. ncurses inspects this capability if it is present,
+ be disabled. <EM>ncurses</EM> inspects this capability if it is present,
to see whether the 1006 protocol is used. If so, it expects the
responses to use the <EM>SGR</EM> <EM>1006</EM> xterm mouse protocol.
Since 1999, <STRONG>xterm(1)</STRONG> has supported <EM>shift</EM>, <EM>control</EM>, <EM>alt</EM>, and <EM>meta</EM>
modifiers which produce distinct special-key strings. In a terminal
- description, ncurses has no special knowledge of the modifiers used.
+ description, <EM>ncurses</EM> has no special knowledge of the modifiers used.
Applications can use the <EM>naming</EM> <EM>convention</EM> established for <STRONG>xterm</STRONG> to
find these special keys in the terminal description.
Starting with the curses convention that <EM>key</EM> <EM>names</EM> begin with "k" and
- that shifted special keys are an uppercase name, ncurses' terminal
+ that shifted special keys are an uppercase name, <EM>ncurses</EM>' terminal
database defines these names to which a suffix is added:
<STRONG>Name</STRONG> <STRONG>Description</STRONG>
16 Meta + Ctrl + Alt + Shift
None of these are predefined; terminal descriptions can refer to <EM>names</EM>
- which ncurses will allocate at runtime to <EM>key-codes</EM>. To use these keys
- in an ncurses program, an application could do this:
+ which <EM>ncurses</EM> will allocate at runtime to <EM>key-codes</EM>. To use these keys
+ in an <EM>ncurses</EM> program, an application could do this:
<STRONG>o</STRONG> using a list of extended key <EM>names</EM>, ask <STRONG><A HREF="curs_terminfo.3x.html">tigetstr(3x)</A></STRONG> for their
values, and
</PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
Thomas E. Dickey
- beginning with ncurses 5.0 (1999)
+ beginning with <EM>ncurses</EM> 5.0 (1999)
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
-ncurses 6.4 2023-1
0-07 <STRONG><A HREF="user_caps.5.html">user_caps(5)</A></STRONG>
+ncurses 6.4 2023-1
2-16 <STRONG><A HREF="user_caps.5.html">user_caps(5)</A></STRONG>
</PRE>
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