156 lines
5.9 KiB
Common Lisp
156 lines
5.9 KiB
Common Lisp
;;;; Copyright © 2023, Jaidyn Ann <jadedctrl@posteo.at>
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;;;;
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;;;; This program is free software: you can redistribute it and/or
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;;;; modify it under the terms of the GNU General Public License as
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;;;; published by the Free Software Foundation, either version 3 of
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;;;; the License, or (at your option) any later version.
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;;;;
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;;;; This program is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;;; GNU General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU General Public License
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;;;; along with this program. If not, see <https://www.gnu.org/licenses/>.
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;;;; FLORA-SEARCH-AURORA.OVERWORLD
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;;;; All game-functions and data relating to the “overworld” (that is,
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;;;; the primary gameplay, the RPG-ish-ish bits).
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(defpackage :flora-search-aurora.dialogue
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(:nicknames :fsa.dia :dialogue :💬)
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(:use :cl)
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(:export #:dialogue-state
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#:start-dialogue #:face #:say #:mumble))
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(in-package :flora-search-aurora.dialogue)
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;;; ———————————————————————————————————
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;;; Dialogue-generation DSL (sorta)
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;;; ———————————————————————————————————
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(defun start-dialogue (&rest dialogue-tree)
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(reduce (lambda (a b) (append a b))
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dialogue-tree))
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(defun face (speaker face)
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(list
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(list :speaker speaker :face face)))
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(defun say (speaker text)
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(list
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(list :speaker speaker :text text :face 'talking-face :progress 0)
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(car (face speaker 'normal-face))))
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(defun mumble (speaker text)
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(list
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(list :speaker speaker :text text :progress 0)))
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;;; ———————————————————————————————————
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;;; Dialogue logic
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;;; ———————————————————————————————————
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(defun pressed-enter-p ()
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"Whether or not the enter/return key has been pressed recently."
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(and (listen)
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(eq (getf (⌨:normalize-char-plist (⌨:read-char-plist)) :char)
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#\return)))
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(defun appropriate-face (map speaker face)
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"Return the face appropriate for the speaker.
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If FACE is a string, used that.
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If FACE is 'TALKING-FACE, then use their talking-face (if they have one).
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If FACE is 'NORMAL-FACE, then use their normal-face (if they’ve got one).
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If FACE is NIL… guess what that does. :^)"
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(let ((talking-face (🌍:getf-entity-data map speaker :talking-face))
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(normal-face (🌍:getf-entity-data map speaker :normal-face)))
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(cond ((and (eq face 'talking-face)
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talking-face)
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talking-face)
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((and (eq face 'normal-face)
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normal-face)
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normal-face)
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((stringp face)
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face))))
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(defun update-speaking-face (map dialogue)
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"Given a line (plist) of dialogue, change speaker’s face to either their
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talking-face or the face given by the dialogue."
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(let* ((speaker (intern (string-upcase (getf dialogue :speaker))))
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(new-face (appropriate-face map speaker (getf dialogue :face))))
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;; Replace the face, when appropriate.
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(when new-face
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(setf (🌍:getf-entity-data map speaker :face) new-face))))
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(defun progress-line-delivery (dialogue)
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"Progress the delivery of a line (plist) of dialogue. That is, increment the
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“said character-count” :PROGRESS, which dictates the portion of the message that
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should be printed on the screen at any given moment."
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(let ((progress (getf dialogue :progress))
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(text (getf dialogue :text)))
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(when (and text
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(< progress (length text)))
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(incf (getf dialogue :progress)))))
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(defun dialogue-state-update (map dialogue-list)
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"The logic/input-processing helper function for DIALOGUE-STATE."
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(update-speaking-face map (car dialogue-list))
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(progress-line-delivery (car dialogue-list))
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;; Progress to the next line of dialogue as appropriate.
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(let ((text (getf (car dialogue-list) :text)))
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(cond ((or (pressed-enter-p)
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(not text))
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(if (cdr dialogue-list)
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(list :dialogue (cdr dialogue-list) :map map)
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(progn
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(✎:hide-cursor)
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(values nil
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(list :map map)))))
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((cdr dialogue-list)
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(list :dialogue dialogue-list :map map)))))
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;;; ———————————————————————————————————
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;;; Dialogue drawing
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;;; ———————————————————————————————————
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(defun dialogue-state-draw (matrix dialogue-list)
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"Draw the dialogue where appropriate.
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Helper function for DIALOGUE-STATE."
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(let ((text (getf (car dialogue-list) :text))
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(progress (getf (car dialogue-list) :progress)))
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(when text
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(✎:show-cursor)
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(📋:render-string-partially matrix text 0 0 :char-count progress))))
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;;; ———————————————————————————————————
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;;; Dialogue loop
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;;; ———————————————————————————————————
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(defun dialogue-state (matrix &key dialogue map)
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"Render a bit of dialogue to the screen, using :FLORA-SEARCH-AURORA.OVERWORLD
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entities as the speakers. Dialogue should be in the format:
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((:text \"Hello, papa!\"
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:speaker \"son\" ;; The entity’s ID (if applicable)
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:face \"owo\") ;; If you want their face to change
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(:face \"=w=\" :speaker 'son) ;; change their face back when done talking
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(:text \"Hello, you little gremlin! <3\"
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:speaker \"papa\"
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...))
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A state-function for use with STATE-LOOP."
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(sleep .02)
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(dialogue-state-draw matrix dialogue)
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(dialogue-state-update map dialogue))
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