ASCII And ANSI Escape Sequences (key-code)
Less than 1 minute
key-code
)
ASCII And ANSI Escape Sequences (Returns character sequences for any key pressed (ie sent from the terminal)
Description
key-code
is a tool used for querying what byte sequence the terminal emulator
Usage
key-code -> <stdout>
<stdin> -> key-code -> <stdout>
Examples
Typical use case
» key-code
Press any key to print its escape constants...
...then press [f9] and key-code
returns...
ANSI Constants: {F9}
Byte Sequence: %[27 91 50 48 126]
Contains Unicode: false
As a method
» tout str '{ESC}[20~' -> key-code
ANSI Constants: {F9}
Byte Sequence: %[27 91 50 48 126]
Contains Unicode: false
Detail
Redirection
If stdout is not a TTY then only the thing written is the ANSI Constant. This is so that it can be used as a variable. eg
key-code -> set $key
event onKeyPress close=$key {
exit
}
See Also
- ANSI Constants: Infixed constants that return ANSI escape sequences
- Murex Event Subsystem (
event
): Event driven programming for shell scripts - Output With Type Annotation (
tout
): Print a string to the stdout and set it's data-type onKeyPress
: Custom definable key bindings and macros
This document was generated from builtins/events/onKeyPress/keycodes_doc.yaml.