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(in-package #:cursed)
(defclass text ()
((data :type 'simple-string :initarg :data :reader data :initform nil)
(index :type '(unsigned-byte 44) :initarg :index :accessor index :initform 0)))
(defun has-data? (cursor)
(< (index cursor) (length (data cursor))))
(defun peek (cursor)
(char (data cursor)
(index cursor)))
(defun advance (cursor)
(make-instance 'text
:data (data cursor)
:index (+ (index cursor) 1)))
(defun distance (from to)
(- (index to)
(index from)))
(defmethod print-object ((obj text) stream)
(print-unreadable-object (obj stream :type t)
(let ((str (if (has-data? obj)
(format nil "~{~a[4;33m~a[m~a~}"
(str:context-window (data obj)
(index obj)
:side-length 10))
"END OF DATA")))
(substitute #\↲ #\Newline str))))
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