vty is a terminal interface library.
This project is hosted on github.com: https://github.com/coreyoconnor/vty
git clone git://github.com/coreyoconnor/vty.git
cabal install vty
Support for a large number of terminals. vt100, ansi, hurd, linux, screen etc etc. Anything with a sufficient terminfo entry.
Automatic handling of window resizes.
If the terminal support UTF-8 then vty supports Unicode output.
Handles multi-column glyphs. (Requires user to properly configure terminal.)
Efficient output. Output buffering and terminal state changes are minimized.
Minimizes repaint area. Virtually eliminating the flicker problems that plagues ncurses programs.
A pure, compositional interface for efficiently constructing display images.
Automatically decodes keyboard keys into (key,[modifier]) tuples.
Automatically supports refresh on Ctrl-L.
Automatically supports timeout after for lone ESC. The timeout is customizable.
Interface is designed for easy compatible extension.
Supports ANSI graphics modes (SGR as defined in console_codes(4)) with a type-safe interface. Gracefull fallback for terminals that do not support, or partially support the standard ANSI graphics modes.
Properly handles cleanup, but not due to signals.
Comprehensive test suite.
Terminals have numerous quirks and bugs. vty picks what works best for the author in ambigious, or buggy situations.
Signal handling of STOP, TERM and INT are non existent.
The character encoding of the terminal is assumed to be UTF-8 if unicode is used.
Terminfo is assumed to be correct unless there is an override configured. Some terminals will not have correct special key support (shifted F10 etc). See Config for customizing vty's behavior for a particular terminal.
Uses the TIOCGWINSZ ioctl to find the current window size, which appears to be limited to Linux and BSD.
Supports "normal" and "extended" (SGR) mouse modes as described at http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
Supports bracketed paste mode as described at http://cirw.in/blog/bracketed-paste
Uses terminfo to determine terminal protocol. With some special rules to handle some omissions from terminfo.
After installing ncurses to user env.
LIBRARY_PATH=$HOME/.nix-profile/lib/ cabal configure --enable-tests --extra-lib-dirs=$HOME/.nix-profile/lib LIBRARY_PATH=$HOME/.nix-profile/lib/ cabal build LIBRARY_PATH=$HOME/.nix-profile/lib/ cabal test
stack build stack test stack install
As of last testing, profiling causes issues with coverage when enabled. To evaluate coverage configure as follows:
rm -rf dist ; cabal configure --enable-tests --enable-library-coverage \ --disable-library-profiling \ --disable-executable-profiling
rm -rf dist ; cabal configure --enable-tests --disable-library-coverage \ --enable-library-profiling \ --enable-executable-profiling