55 lines
2.4 KiB
ReStructuredText
55 lines
2.4 KiB
ReStructuredText
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==============================================
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``termcurses`` Terminal Curses control support
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==============================================
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Terminal emulation library for NuttX
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The Termcurses library provides terminal emulation support for performing common
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screen actions such as cursor movement, foreground / background color control
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and keyboard escape sequence mapping. The initial release supports only ``vt100``
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/ ``ansi`` terminal types, but the library architecture has an extensible
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interface to allow support for additional emulation types if needed.
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The library can be used standalone or in conjunction with the
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``apps/graphics/pdcurses`` libraries. The pdcurses libraries have been updated
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with a _termcurses_ config option which fully integrates the termcurses library
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automatically.
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Usage
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-----
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To use the termcurses library, the routines must be initialized by calling the
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``termcurses_initterm()`` function. This routine accepts a terminal type string
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identifying the type of terminal emulation support requested. If a ``NULL``
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pointer is passed, then the routine will check for a ``TERM`` environment variable
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and set the terminal type based on that string. If the emulation type still
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cannot be determined, the routine will default to ``vt100`` emulation type.
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Upon successful initialization, the ``termcurses_initterm()`` function will
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allocate an new terminal context which must be passed with all future termcurses
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library functions. When this context is no longer needed, the
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``termcurses_deinitterm()`` routine should be called for proper freeing and
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terminal teardown.
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Use with ``telnetd``
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--------------------
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When using termcurses with the telnet daemon, the telnet config option
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``CONFIG_TELNET_SUPPORT_NAWS`` should be enabled. This option adds code to the
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telnet library for terminal size negotiation. Without this option, the telnet
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routines have no concept of the terminal size, and therefore the termcurses
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routines must default to ``80x24`` screen mode.
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Use with ``pdcurses``
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---------------------
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When using the pdcurses termcurses support (i.e you have enabled both the
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``CONFIG_PDCURSES`` and ``CONFIG_TERMCURSES`` options),, the pdcurses input device
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should be selected to be ``TERMINPUT`` (i.e. set ``CONFIG_PDCURSES_TERMINPUT=y``).
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This causes the pdcurses keyboard input logic to use ``termcurses_getkeycode()``
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routine for curses input.
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Author: Ken Pettit
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Date: 2018-2019
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