297 lines
12 KiB
Common Lisp
297 lines
12 KiB
Common Lisp
;;;; Copyright © 2023, Jaidyn Ann <jadedctrl@posteo.at>
|
||
;;;;
|
||
;;;; This program is free software: you can redistribute it and/or
|
||
;;;; modify it under the terms of the GNU General Public License as
|
||
;;;; published by the Free Software Foundation, either version 3 of
|
||
;;;; the License, or (at your option) any later version.
|
||
;;;;
|
||
;;;; This program is distributed in the hope that it will be useful,
|
||
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;;; GNU General Public License for more details.
|
||
;;;;
|
||
;;;; You should have received a copy of the GNU General Public License
|
||
;;;; along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
;;;; FLORA-SEARCH-AURORA.UI
|
||
;;;; Generic menu-making, displaying, and management.
|
||
;;;; Let's get to it, we're on a deadline!
|
||
|
||
(defpackage :flora-search-aurora.ui
|
||
(:nicknames :fsa.u :ui :📋)
|
||
(:use :cl :assoc-utils)
|
||
(:export #:menu-state
|
||
#:render-line #:render-string #:render-string-partially
|
||
:label :selection :selected))
|
||
|
||
(in-package :flora-search-aurora.ui)
|
||
|
||
|
||
;;; ———————————————————————————————————
|
||
;;; Menu loops
|
||
;;; ———————————————————————————————————
|
||
(defun menu-state (matrix menu-alist)
|
||
"Render a menu in menu-alist format to the given matrix, and process user-input.
|
||
A state-function for use with the #'state-loop."
|
||
(sleep .02)
|
||
(menu-state-draw matrix menu-alist)
|
||
(menu-state-update menu-alist))
|
||
|
||
|
||
(defun menu-state-draw (matrix menu-alist)
|
||
"Render a menu in menu-alist format to the given matrix.
|
||
A core part of #'menu-state."
|
||
(render-menu-strip matrix menu-alist 0 0))
|
||
|
||
|
||
(defun menu-state-update (menu-alist)
|
||
"Update a menu — that is, take user input and modify the menu’s alist appropriately.
|
||
A core part of #'menu-state."
|
||
(progress-menu-items menu-alist)
|
||
(process-menu-input menu-alist))
|
||
|
||
|
||
|
||
;;; ———————————————————————————————————
|
||
;;; Menu display
|
||
;;; ———————————————————————————————————
|
||
(defun render-line (matrix text x y)
|
||
"Apply a one-line string to the matrix at the given coordinates."
|
||
(let ((dims (array-dimensions matrix)))
|
||
(if (and (stringp text)
|
||
(> (length text) 0))
|
||
(progn
|
||
(ignore-errors (setf (aref matrix y x) (char text 0)))
|
||
(render-line matrix (subseq text 1)
|
||
(+ x 1) y))
|
||
matrix)))
|
||
|
||
|
||
(defun render-menu-item
|
||
(matrix text x y &key (width (+ (length text) 2)) (height 3) (selection 0) (selected nil))
|
||
"Render a “menu-item” — that is, text surrounded by a box with an optional
|
||
'selected' form. If selected is a non-zero number below 100, then that percent
|
||
of the box will be displayed as selected/highlighted. This percent is from
|
||
left-to-right, unless negative — in which case, right-to-left."
|
||
(render-string matrix text (+ x 1) (+ 1 y)
|
||
:max-column (- (+ x width) 1)
|
||
:max-row (- (+ y height) 2))
|
||
;; Render the normal top and bottom bars.
|
||
(dotimes (i width)
|
||
(setf (aref matrix y (+ x i)) #\-)
|
||
(setf (aref matrix (+ y (- height 1)) (+ x i)) #\-))
|
||
|
||
;; Render the weird “selected” top and bottom bars. A menu item might be
|
||
;; only partially-selected…
|
||
(if (and selection
|
||
(not (eq selection 0)))
|
||
(let* ((bar-width
|
||
(at-most width (ceiling (* width (* (abs selection)
|
||
.01)))))
|
||
(bar-start (if (> 0 selection) (- width bar-width) 0)))
|
||
(dotimes (i bar-width)
|
||
(setf (aref matrix y (+ x bar-start i)) #\=)
|
||
(setf (aref matrix (+ y (- height 1)) (+ x bar-start i)) #\=))))
|
||
|
||
;; Render the horizontal “earmuffs” for helping the selected item stand out.
|
||
(when selected
|
||
(dotimes (i (- height 2))
|
||
(setf (aref matrix (+ y i 1) x) #\|)
|
||
(setf (aref matrix (+ y i 1) (+ x width -1)) #\|))
|
||
matrix))
|
||
|
||
|
||
(defun render-menu-strip (matrix items x y &key (max-item-width 12) (height 3))
|
||
"Render several menu items to the matrix, starting at the given x/y coordinates,
|
||
maximum width for any given item, and the height of all items.
|
||
The item list should be an alist of the following format:
|
||
(((LABEL . “FOO”)(SELECTED . T)(SELECTION . 100)) ((LABEL . “BAR”)(SELECTION . -20)) ⋯)"
|
||
(let ((x x))
|
||
(mapcar
|
||
(lambda (item)
|
||
(let* ((label (cdr (assoc 'label item)))
|
||
(selection (or (cdr (assoc 'selection item))
|
||
0))
|
||
(width (at-most max-item-width
|
||
(+ (length label) 2))))
|
||
(render-menu-item matrix label x y
|
||
:width width
|
||
:height height
|
||
:selection selection
|
||
:selected (cdr (assoc 'selected item)))
|
||
(setf x (+ x width 1))))
|
||
items))
|
||
matrix)
|
||
|
||
|
||
(defun render-string (matrix text x y &key (max-column 72) (max-row 20))
|
||
"Render the given string to the matrix of characters, character-by-character.
|
||
Will line-break or truncate as appropriate and necessary to not exceed the
|
||
positional arguments nor the dimensions of the matrix."
|
||
(render-string-partially matrix text x y :max-column max-column :max-row max-row
|
||
:char-count (length text)))
|
||
|
||
|
||
(defun render-string-partially (matrix text x y &key (char-count 0) (max-column 72) (max-row 20))
|
||
"Partially render the given string to a matrix of characters. Will render only
|
||
a portion of the string, dictated by the CHAR-COUNT.
|
||
See the similar RENDER-STRING function."
|
||
(let* ((dimensions (array-dimensions matrix))
|
||
(max-column (at-most (cadr dimensions) max-column))
|
||
(max-write-row (at-most (at-most (car dimensions) max-row)
|
||
(floor (/ char-count max-column))))
|
||
(max-column-at-max-write-row (- char-count (* max-write-row max-column)))
|
||
(substrings (split-string-by-length text (- max-column x)))
|
||
(row 0))
|
||
(loop while (and (<= (+ y row) max-row)
|
||
substrings)
|
||
do (cond ((< row max-write-row)
|
||
(render-line matrix (pop substrings)
|
||
x (+ y row)))
|
||
((eq row max-write-row)
|
||
(render-line matrix (subseq (pop substrings) 0 max-column-at-max-write-row)
|
||
x (+ y row)))
|
||
('t
|
||
(pop substrings)))
|
||
(incf row)))
|
||
matrix)
|
||
|
||
|
||
|
||
;;; ———————————————————————————————————
|
||
;;; Menu logic
|
||
;;; ———————————————————————————————————
|
||
(defun progress-menu-items (menu-alist)
|
||
"Given an associative list of menu-items, decrement or increment each
|
||
item's “selected-percentage”, so that they converge at the right percent.
|
||
That is, 0 for non-selected items and 100 for selected items."
|
||
(mapcar
|
||
(lambda (item)
|
||
(let* ((selection (assoc 'selection item))
|
||
(selection-num (or (cdr selection) 0))
|
||
(selectedp (cdr (assoc 'selected item))))
|
||
(if selection
|
||
(setf (cdr selection)
|
||
(gravitate-toward
|
||
(cond ((and selectedp (< selection-num 0) 0)
|
||
-100)
|
||
(selectedp 100)
|
||
('t 0))
|
||
(cdr selection) 10)))))
|
||
menu-alist)
|
||
menu-alist)
|
||
|
||
|
||
(defun process-menu-input (menu-alist)
|
||
"Get and process any keyboard input, modifying the menu alist as necessary."
|
||
(if (listen)
|
||
(let* ((input (⌨:normalize-char-plist (⌨:read-char-plist)))
|
||
(selected-item (nth (selected-menu-item-position menu-alist)
|
||
menu-alist))
|
||
(func (cdr (assoc 'function selected-item)))
|
||
(return-val (assoc 'return selected-item)))
|
||
(case (getf input :char)
|
||
(#\→ (progn (select-right-menu-item menu-alist)
|
||
't))
|
||
(#\← (progn (select-left-menu-item menu-alist)
|
||
't))
|
||
(#\return
|
||
(cond ((and func return-val)
|
||
(apply func '())
|
||
(cdr return-val))
|
||
(func
|
||
(apply func '()))
|
||
(return-val
|
||
(cdr return-val))
|
||
('t
|
||
't)))
|
||
(otherwise 't)))
|
||
't))
|
||
|
||
|
||
(defun select-menu-item (menu-alist position)
|
||
"Given a menu associative list, select the menu-item at the given position."
|
||
(let ((old-position (selected-menu-item-position menu-alist)))
|
||
;; The “polarity” (direction of selection) depends on the relative
|
||
;; direction of the previous selection.
|
||
(setf (aget (nth position menu-alist) 'selection)
|
||
(if (< old-position position) 10 -10))
|
||
(setf (aget (nth position menu-alist) 'selected) 't)
|
||
;; Likewise for the previously-selected item.
|
||
(setf (aget (nth old-position menu-alist) 'selection)
|
||
(if (< old-position position) -90 90))
|
||
(setf (aget (nth old-position menu-alist) 'selected) nil))
|
||
menu-alist)
|
||
|
||
|
||
(defun select-right-menu-item (menu-alist)
|
||
"Select the item to the right of the currenty-selected item."
|
||
(let ((new-selection (+ (selected-menu-item-position menu-alist) 1)))
|
||
(if (< new-selection (length menu-alist))
|
||
(select-menu-item menu-alist new-selection))))
|
||
|
||
|
||
(defun select-left-menu-item ( menu-alist)
|
||
"Select the item to the left of the currenty-selected item."
|
||
(let ((new-selection (- (selected-menu-item-position menu-alist) 1)))
|
||
(if (>= new-selection 0)
|
||
(select-menu-item menu-alist new-selection))))
|
||
|
||
|
||
(defun selected-menu-item-position (menu-alist)
|
||
"Returns the index of the menu alist's selected item."
|
||
(or (position
|
||
't menu-alist
|
||
:test (lambda (ignore list-item)
|
||
(cdr (assoc 'selected list-item))))
|
||
0))
|
||
|
||
|
||
|
||
;;; ———————————————————————————————————
|
||
;;; Misc. utils
|
||
;;; ———————————————————————————————————
|
||
(defun split-string-by-length (string line-length &key (substrings '()))
|
||
"Given a string, split it into a list of substrings all with lengths
|
||
equal or lower to the given length."
|
||
(if (> (length string) line-length)
|
||
(split-string-by-length
|
||
(subseq string line-length)
|
||
line-length
|
||
:substrings (append substrings
|
||
`(,(subseq string 0 line-length))))
|
||
(append substrings `(,string))))
|
||
|
||
|
||
(defun at-most (maximum num)
|
||
"This function returns at most every hope and dream you've ever had, and at
|
||
minimum returns your more pitiful of moments."
|
||
(if (> num maximum)
|
||
maximum
|
||
num))
|
||
|
||
|
||
(defun at-least (minimum num)
|
||
"This function returns at least every hope and dream you've ever had, and at
|
||
maximum returns your more pitiful of moments."
|
||
(if (< num minimum)
|
||
minimum
|
||
num))
|
||
|
||
|
||
(defun gravitate-toward (goal num delta)
|
||
"Either add to a number, or subtract from it; whichever brings it closer to zero.
|
||
In addition, the resultant value shall not “pass” zero."
|
||
(cond
|
||
((< num goal)
|
||
(at-most goal (+ num delta)))
|
||
((> num goal)
|
||
(at-least goal (- num delta)))
|
||
('t
|
||
goal)))
|
||
|
||
|
||
;;"---{============= -------------------"
|
||
;; | Kill your mom | Give into despair
|
||
;; ---{============= -------------------
|