ao-mud is a spellbook of well-commented atomic bash scripts that each do one thing. we are building semantic building blocks for an autonomously-evolving digital spellcasting language.
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#!/usr/bin/env bash |
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# This magical spell captures and processes key presses. |
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# Use it to capture key presses from the terminal and determine which key was pressed. |
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# todo: Tab key not distinguished from Enter (\t case does not work) |
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# Define the function to handle key presses |
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await_keypress() { |
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# Read a single character from the terminal |
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read -s -n1 key |
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# Check the value of the key |
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case "$key" in |
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# Enter key |
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$'\t') |
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echo "tab" |
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;; |
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$'\n') |
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echo "enter" |
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;; |
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'') # also fires for Tab key |
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echo "enter" |
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;; |
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'') |
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echo "backspace" |
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;; |
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$'\b') |
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echo "backspace" |
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;; |
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# Escape sequence, could be any number of keys depending on next character |
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$'\e') |
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read -rsn2 -t 0.1 key |
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case "$key" in |
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'') |
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echo 'escape' |
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;; |
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# Up arrow key |
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$'[A') |
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echo "up" |
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;; |
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# Down arrow key |
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$'[B') |
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echo "down" |
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;; |
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# Right arrow key |
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$'[C') |
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echo "right" |
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;; |
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# Left arrow key |
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$'[D') |
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echo "left" |
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;; |
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$'[3') |
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echo "delete" |
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;; |
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*) |
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echo "escaped key: $key" |
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;; |
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esac |
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;; |
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# Any other key |
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*) |
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echo "$key" |
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# od -c <<< $key # debug |
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;; |
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esac |
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} |
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await_keypress
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