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hello-world.lisp(file created)
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| 1 | + | ;;; hello-name.lisp - A simple croatoan "Hello World" + name input example | |
| 2 | + | ;;; | |
| 3 | + | ;;; Prerequisites: | |
| 4 | + | ;;; 1. ncurses must be installed on your system | |
| 5 | + | ;;; macOS: brew install ncurses (usually pre-installed) | |
| 6 | + | ;;; Linux: apt-get install libncurses-dev | |
| 7 | + | ;;; 2. Load croatoan via Quicklisp: | |
| 8 | + | ;;; (ql:quickload :croatoan) | |
| 9 | + | ;;; | |
| 10 | + | ;;; To run: Load this file and call (hello-name) | |
| 11 | + | ;;; Note: Run from a real terminal, not from SLIME/Emacs REPL | |
| 12 | + | ;;; (ncurses doesn't work properly in SLIME) | |
| 13 | + | ||
| 14 | + | (defpackage :hello-name | |
| 15 | + | (:use :cl :croatoan) | |
| 16 | + | (:export #:hello-name)) | |
| 17 | + | ||
| 18 | + | (in-package :hello-name) | |
| 19 | + | ||
| 20 | + | (defun hello-name () | |
| 21 | + | "Display 'Hello World' and prompt for the user's name." | |
| 22 | + | (with-screen (scr :input-echoing t | |
| 23 | + | :input-buffering nil | |
| 24 | + | :cursor-visible t | |
| 25 | + | :enable-colors t) | |
| 26 | + | ;; Clear and set up | |
| 27 | + | (clear scr) | |
| 28 | + | ||
| 29 | + | ;; Display "Hello, World!" at top | |
| 30 | + | (move scr 2 5) | |
| 31 | + | (setf (color-pair scr) '(:cyan :black)) | |
| 32 | + | (setf (attributes scr) '(:bold)) | |
| 33 | + | (add-string scr "Hello, World!") | |
| 34 | + | ||
| 35 | + | ;; Prompt for name | |
| 36 | + | (setf (attributes scr) nil) | |
| 37 | + | (setf (color-pair scr) '(:white :black)) | |
| 38 | + | (move scr 4 5) | |
| 39 | + | (add-string scr "Enter your name: ") | |
| 40 | + | (refresh scr) | |
| 41 | + | ||
| 42 | + | ;; Read the name character by character | |
| 43 | + | (let ((name (make-array 0 :element-type 'character | |
| 44 | + | :adjustable t | |
| 45 | + | :fill-pointer 0))) | |
| 46 | + | (event-case (scr event) | |
| 47 | + | ;; Enter key - finish input | |
| 48 | + | (#\Newline | |
| 49 | + | (return-from event-case)) | |
| 50 | + | (#\Return | |
| 51 | + | (return-from event-case)) | |
| 52 | + | ||
| 53 | + | ;; Backspace handling | |
| 54 | + | (#\Backspace | |
| 55 | + | (when (> (length name) 0) | |
| 56 | + | (vector-pop name) | |
| 57 | + | ;; Move cursor back and erase character | |
| 58 | + | (move scr 4 (+ 22 (length name))) | |
| 59 | + | (add-char scr #\Space) | |
| 60 | + | (move scr 4 (+ 22 (length name)))) | |
| 61 | + | (refresh scr)) | |
| 62 | + | ||
| 63 | + | ;; Delete key (also backspace on some terminals) | |
| 64 | + | (#\Rubout | |
| 65 | + | (when (> (length name) 0) | |
| 66 | + | (vector-pop name) | |
| 67 | + | (move scr 4 (+ 22 (length name))) | |
| 68 | + | (add-char scr #\Space) | |
| 69 | + | (move scr 4 (+ 22 (length name)))) | |
| 70 | + | (refresh scr)) | |
| 71 | + | ||
| 72 | + | ;; Regular character input | |
| 73 | + | (otherwise | |
| 74 | + | (when (and (characterp event) | |
| 75 | + | (graphic-char-p event)) | |
| 76 | + | (vector-push-extend event name) | |
| 77 | + | (add-char scr event) | |
| 78 | + | (refresh scr)))) | |
| 79 | + | ||
| 80 | + | ;; Display greeting | |
| 81 | + | (setf (color-pair scr) '(:green :black)) | |
| 82 | + | (setf (attributes scr) '(:bold)) | |
| 83 | + | (move scr 6 5) | |
| 84 | + | (add-string scr (format nil "Nice to meet you, ~A!" name)) | |
| 85 | + | ||
| 86 | + | (setf (attributes scr) nil) | |
| 87 | + | (setf (color-pair scr) '(:white :black)) | |
| 88 | + | (move scr 8 5) | |
| 89 | + | (add-string scr "Press any key to exit...") | |
| 90 | + | (refresh scr) | |
| 91 | + | ||
| 92 | + | ;; Wait for a keypress before exiting | |
| 93 | + | (get-char scr) | |
| 94 | + | ||
| 95 | + | ;; Return the name | |
| 96 | + | name))) | |
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