865 lines
19 KiB
EmacsLisp
865 lines
19 KiB
EmacsLisp
;;; 06-linuxplus-quiz-mode.el --- linuxplus-quiz-mode
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(defvar-local linuxplus-quiz-lesson-name nil)
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(defvar-local linuxplus-quiz-questions nil)
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(defvar-local linuxplus-quiz-user-answers nil)
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(defvar-local linuxplus-quiz-current-question 0)
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(defvar-local linuxplus-quiz-current-choice 0)
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(defvar-local linuxplus-quiz-return-window-configuration nil)
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(defvar-local linuxplus-quiz-return-buffer nil)
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(defun linuxplus-quiz--question-type (question)
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(plist-get question :type))
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(defun linuxplus-quiz--question-prompt (question)
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(plist-get question :prompt))
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(defun linuxplus-quiz--question-answer (question)
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(plist-get question :answer))
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(defun linuxplus-quiz--question-answers (question)
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(plist-get question :answers))
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(defun linuxplus-quiz--question-choices (question)
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(plist-get question :choices))
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(defun linuxplus-quiz--current-question ()
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(nth linuxplus-quiz-current-question
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linuxplus-quiz-questions))
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(defun linuxplus-quiz--current-user-answer ()
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(nth linuxplus-quiz-current-question
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linuxplus-quiz-user-answers))
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(defun linuxplus-quiz--set-current-user-answer (answer)
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(setf
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(nth linuxplus-quiz-current-question
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linuxplus-quiz-user-answers)
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answer))
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(defun linuxplus-quiz--answer-marker (answer)
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(cond
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((eq answer 'true) "[t]")
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((eq answer 'false) "[f]")
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((eq answer 'yes) "[y]")
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((eq answer 'no) "[n]")
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((eq answer 'selected) "[*]")
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(t "[]")))
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(defun linuxplus-quiz--answer-string (answer)
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(cond
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((eq answer 'true) "true")
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((eq answer 'false) "false")
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((eq answer 'yes) "yes")
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((eq answer 'no) "no")
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((listp answer) (format "%S" answer))
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((null answer) "unanswered")
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(t (format "%S" answer))))
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(defun linuxplus-quiz--correct-answer-for-display
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(question)
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(let ((type
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(linuxplus-quiz--question-type question)))
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(cond
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((memq type '(true-false yes-no))
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(linuxplus-quiz--answer-string
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(linuxplus-quiz--question-answer question)))
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((eq type 'multiple)
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(format "%S"
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(linuxplus-quiz--question-answers
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question)))
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(t "unknown"))))
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(defun linuxplus-quiz--advance-question ()
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(when (< linuxplus-quiz-current-question
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(1- (length linuxplus-quiz-questions)))
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(setq linuxplus-quiz-current-question
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(1+ linuxplus-quiz-current-question))
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(setq linuxplus-quiz-current-choice 0)))
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(defun linuxplus-quiz--previous-question ()
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(when (> linuxplus-quiz-current-question 0)
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(setq linuxplus-quiz-current-question
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(1- linuxplus-quiz-current-question))
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(setq linuxplus-quiz-current-choice 0)))
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(defun linuxplus-quiz--multiple-selected-p
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(answer choice-index)
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(and (listp answer)
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(memq choice-index answer)))
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(defun linuxplus-quiz--advance-choice ()
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"Advance to next multiple-choice bracket."
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(let* ((question
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(linuxplus-quiz--current-question))
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(choices
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(linuxplus-quiz--question-choices
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question)))
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(when (and choices
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(< linuxplus-quiz-current-choice
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(1- (length choices))))
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(setq linuxplus-quiz-current-choice
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(1+ linuxplus-quiz-current-choice)))))
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(defun linuxplus-quiz--toggle-current-choice ()
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"Toggle current multiple-choice selection."
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(let* ((answer
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(copy-sequence
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(or
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(linuxplus-quiz--current-user-answer)
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nil)))
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(choice linuxplus-quiz-current-choice)
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(was-selected
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(memq choice answer)))
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(if was-selected
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;; Remove selection and stay.
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(setq answer
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(delq choice answer))
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;; Add selection and advance.
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(push choice answer)
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(setq answer
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(sort answer #'<))
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(linuxplus-quiz--set-current-user-answer
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answer)
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(linuxplus-quiz--advance-choice)
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;; Stop removal logic.
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(setq answer nil))
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;; Removal path only.
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(when answer
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(setq answer
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(sort answer #'<))
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(linuxplus-quiz--set-current-user-answer
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answer))))
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(defun linuxplus-quiz--answer-correct-p
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(question user-answer)
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(let ((type
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(linuxplus-quiz--question-type question)))
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(cond
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((memq type '(true-false yes-no))
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(eq user-answer
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(linuxplus-quiz--question-answer
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question)))
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((eq type 'multiple)
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(equal
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(sort
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(copy-sequence
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(or user-answer nil))
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#'<)
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(sort
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(copy-sequence
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(linuxplus-quiz--question-answers
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question))
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#'<)))
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(t nil))))
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(defun linuxplus-quiz--question-index-at-point ()
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"Return zero-based question index at point."
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(save-excursion
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(let ((found nil))
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(when
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(re-search-backward
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"^\\([0-9]+\\)\\.$"
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nil t)
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(setq found
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(1-
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(string-to-number
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(match-string 1)))))
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(when
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(and found
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(>= found 0)
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(< found
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(length
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linuxplus-quiz-questions)))
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found))))
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(defun linuxplus-quiz--choice-index-at-point ()
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"Return zero-based multiple-choice bracket index at point."
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(save-excursion
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(let ((current-line
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(line-beginning-position))
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(question-start nil)
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(choice-index 0)
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result)
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;; Find question start.
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(when
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(re-search-backward
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"^\\([0-9]+\\)\\.$"
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nil t)
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(setq question-start (point)))
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(when question-start
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;; Start searching after question header.
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(forward-line 1)
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;; Walk brackets.
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(while
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(and
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(null result)
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(re-search-forward
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"\\[[^]]*\\]"
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nil t))
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;; Did we hit current line?
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(when
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(= (line-beginning-position)
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current-line)
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(setq result choice-index))
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;; Next bracket index.
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(setq choice-index
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(1+ choice-index))))
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result)))
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(defun linuxplus-quiz--sync-current-position-from-point ()
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"Update current question and multiple-choice bracket from cursor position."
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(let ((question-index
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(linuxplus-quiz--question-index-at-point)))
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(when question-index
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(setq linuxplus-quiz-current-question
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question-index)
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(if
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(eq
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))
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'multiple)
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(setq linuxplus-quiz-current-choice
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(or
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(linuxplus-quiz--choice-index-at-point)
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0))
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(setq linuxplus-quiz-current-choice 0)))))
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(defun linuxplus-quiz--invalid-input-message ()
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(linuxplus-quiz--sync-current-position-from-point)
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(let ((type
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))))
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(cond
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((eq type 'true-false)
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(message
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"Valid input: t for true, f for false."))
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((eq type 'yes-no)
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(message
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"Valid input: y for yes, n for no."))
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((eq type 'multiple)
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(message
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"Use the space bar to add/remove the * character."))
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(t
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(message "Invalid input.")))))
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(defun linuxplus-quiz--set-answer-and-maybe-advance
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(answer)
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"Set ANSWER.
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If unanswered, advance.
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If replacing, stay."
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(linuxplus-quiz--sync-current-position-from-point)
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(let ((old-answer
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(linuxplus-quiz--current-user-answer)))
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(linuxplus-quiz--set-current-user-answer
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answer)
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(unless old-answer
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(linuxplus-quiz--advance-question))
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(linuxplus-quiz-render)))
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(defun linuxplus-quiz-render ()
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(let ((inhibit-read-only t))
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(erase-buffer)
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(insert "Linux+ Quiz\n")
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(insert "===========\n\n")
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(let ((current-type
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))))
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(cond
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((eq current-type 'true-false)
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(insert
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"Type 't' for true or 'f' for false inside the brackets.\n"))
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((eq current-type 'yes-no)
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(insert
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"Type 'y' for yes or 'n' for no inside the brackets.\n"))
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((eq current-type 'multiple)
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(insert
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"Use the space bar to add/remove the * character for multiple choice questions.\n"))
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(t
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(insert "Answer the question.\n"))))
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(insert
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"b = back, TAB = forward, x = finish, q = quit\n\n")
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(dotimes
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(i (length linuxplus-quiz-questions))
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(let* ((question
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(nth i linuxplus-quiz-questions))
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(type
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(linuxplus-quiz--question-type
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question))
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(prompt
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(linuxplus-quiz--question-prompt
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question))
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(user-answer
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(nth i linuxplus-quiz-user-answers))
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(current-question-p
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(= i
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linuxplus-quiz-current-question)))
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(insert
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(format "%d.\n" (1+ i)))
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(insert
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(format " %s\n" prompt))
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(cond
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((eq type 'true-false)
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(insert
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(format
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"%s %s True or False\n\n"
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(if current-question-p
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">"
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" ")
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(linuxplus-quiz--answer-marker
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user-answer))))
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((eq type 'yes-no)
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(insert
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(format
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"%s %s Yes or No\n\n"
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(if current-question-p
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">"
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" ")
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(linuxplus-quiz--answer-marker
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user-answer))))
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((eq type 'multiple)
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(let ((choices
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(linuxplus-quiz--question-choices
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question)))
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(dotimes
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(choice-index
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(length choices))
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(let*
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((selected
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(if
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(linuxplus-quiz--multiple-selected-p
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user-answer
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choice-index)
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'selected
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nil))
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(choice-current-p
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(and
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current-question-p
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(= choice-index
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linuxplus-quiz-current-choice))))
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(insert
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(format
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"%s %s %s\n"
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(if choice-current-p
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">"
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" ")
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(linuxplus-quiz--answer-marker
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selected)
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(nth choice-index
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choices))))))
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(insert "\n")))))
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(insert
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"\nReminder: x = finish quiz, q = quit/return to lesson.\n"))
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(linuxplus-quiz-goto-current-answer))
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(defun linuxplus-quiz-goto-current-answer ()
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(goto-char (point-min))
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(let ((target-question
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(format "^%d\\.$"
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(1+
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linuxplus-quiz-current-question))))
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(when
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(re-search-forward
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target-question
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nil t)
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(let ((type
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))))
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(cond
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((memq type '(true-false yes-no))
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(when
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(re-search-forward
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"\\[[^]]*\\]"
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nil t)
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(backward-char 1)))
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((eq type 'multiple)
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(dotimes
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(_ linuxplus-quiz-current-choice)
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(re-search-forward
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"\\[[^]]*\\]"
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nil t))
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(when
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(re-search-forward
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"\\[[^]]*\\]"
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nil t)
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(backward-char 1))))))))
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(defun linuxplus-quiz-answer-true ()
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(interactive)
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(linuxplus-quiz--sync-current-position-from-point)
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(if
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(eq
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))
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'true-false)
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(linuxplus-quiz--set-answer-and-maybe-advance
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'true)
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(linuxplus-quiz--invalid-input-message)))
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(defun linuxplus-quiz-answer-false ()
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(interactive)
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(linuxplus-quiz--sync-current-position-from-point)
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(if
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(eq
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))
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'true-false)
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(linuxplus-quiz--set-answer-and-maybe-advance
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'false)
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(linuxplus-quiz--invalid-input-message)))
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(defun linuxplus-quiz-answer-yes ()
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(interactive)
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(linuxplus-quiz--sync-current-position-from-point)
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(if
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(eq
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))
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'yes-no)
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(linuxplus-quiz--set-answer-and-maybe-advance
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'yes)
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(linuxplus-quiz--invalid-input-message)))
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(defun linuxplus-quiz-answer-no ()
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(interactive)
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(linuxplus-quiz--sync-current-position-from-point)
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(if
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(eq
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))
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'yes-no)
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(linuxplus-quiz--set-answer-and-maybe-advance
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'no)
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(linuxplus-quiz--invalid-input-message)))
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(defun linuxplus-quiz-toggle-multiple ()
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(interactive)
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(linuxplus-quiz--sync-current-position-from-point)
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(if
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(eq
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))
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'multiple)
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(progn
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(linuxplus-quiz--toggle-current-choice)
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(linuxplus-quiz-render))
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(linuxplus-quiz--invalid-input-message)))
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(defun linuxplus-quiz-next ()
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(interactive)
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(linuxplus-quiz--sync-current-position-from-point)
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(let ((type
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))))
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(if
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(and
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(eq type 'multiple)
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(< linuxplus-quiz-current-choice
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(1-
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(length
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(linuxplus-quiz--question-choices
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(linuxplus-quiz--current-question))))))
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(setq linuxplus-quiz-current-choice
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(1+
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linuxplus-quiz-current-choice))
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(linuxplus-quiz--advance-question)))
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(linuxplus-quiz-render))
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(defun linuxplus-quiz-prev ()
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(interactive)
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(linuxplus-quiz--sync-current-position-from-point)
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(let ((type
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(linuxplus-quiz--question-type
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(linuxplus-quiz--current-question))))
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(if
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(and
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(eq type 'multiple)
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(> linuxplus-quiz-current-choice 0))
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(setq linuxplus-quiz-current-choice
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(1-
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linuxplus-quiz-current-choice))
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(linuxplus-quiz--previous-question)))
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(linuxplus-quiz-render))
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(defun linuxplus-quiz-invalid-key ()
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(interactive)
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(linuxplus-quiz--invalid-input-message))
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(defun linuxplus-quiz-return-to-lesson ()
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"Return to lesson/window layout."
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(interactive)
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(let ((config
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linuxplus-quiz-return-window-configuration)
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(buffer
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linuxplus-quiz-return-buffer))
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(when
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(window-configuration-p config)
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(set-window-configuration config))
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(when
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(buffer-live-p buffer)
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(switch-to-buffer buffer))))
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(defun linuxplus-quiz-finish ()
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(interactive)
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(let ((score 0)
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(total
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|
(length linuxplus-quiz-questions)))
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(dotimes (i total)
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|
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(when
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|
(linuxplus-quiz--answer-correct-p
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|
(nth i linuxplus-quiz-questions)
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|
(nth i linuxplus-quiz-user-answers))
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(setq score (1+ score))))
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|
|
(linuxplus-record-score
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|
linuxplus-quiz-lesson-name
|
|
score)
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|
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(let ((inhibit-read-only t))
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|
|
(erase-buffer)
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|
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(insert "Linux+ Quiz Results\n")
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|
(insert "===================\n\n")
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|
|
|
(insert
|
|
(format
|
|
"Lesson: %s\n"
|
|
linuxplus-quiz-lesson-name))
|
|
|
|
(insert
|
|
(format
|
|
"Score: %d/%d\n\n"
|
|
score total))
|
|
|
|
(insert "Detailed review:\n\n")
|
|
|
|
(dotimes (i total)
|
|
|
|
(let*
|
|
((question
|
|
(nth i linuxplus-quiz-questions))
|
|
|
|
(prompt
|
|
(linuxplus-quiz--question-prompt
|
|
question))
|
|
|
|
(user-answer
|
|
(nth i linuxplus-quiz-user-answers)))
|
|
|
|
(insert
|
|
(format
|
|
"%d. %s\n"
|
|
(1+ i)
|
|
prompt))
|
|
|
|
(insert
|
|
(format
|
|
" Your answer: %s\n"
|
|
(linuxplus-quiz--answer-string
|
|
user-answer)))
|
|
|
|
(insert
|
|
(format
|
|
" Correct answer: %s\n"
|
|
(linuxplus-quiz--correct-answer-for-display
|
|
question)))
|
|
|
|
(insert
|
|
(format
|
|
" Result: %s\n\n"
|
|
|
|
(if
|
|
(linuxplus-quiz--answer-correct-p
|
|
question
|
|
user-answer)
|
|
|
|
"correct"
|
|
|
|
"incorrect")))))
|
|
|
|
(insert
|
|
"Press q to return to the lesson.\n"))
|
|
|
|
(goto-char (point-min))
|
|
|
|
(linuxplus-quiz-mode)
|
|
|
|
(message
|
|
"Quiz complete. Score: %d/%d"
|
|
score total)))
|
|
|
|
(setq linuxplus-quiz-mode-map
|
|
|
|
(let ((map
|
|
(make-sparse-keymap)))
|
|
|
|
;; invalid printable input
|
|
|
|
(dotimes (i 95)
|
|
|
|
(define-key
|
|
map
|
|
(char-to-string (+ i 32))
|
|
#'linuxplus-quiz-invalid-key))
|
|
|
|
;; valid answers
|
|
|
|
(define-key
|
|
map
|
|
(kbd "t")
|
|
#'linuxplus-quiz-answer-true)
|
|
|
|
(define-key
|
|
map
|
|
(kbd "f")
|
|
#'linuxplus-quiz-answer-false)
|
|
|
|
(define-key
|
|
map
|
|
(kbd "y")
|
|
#'linuxplus-quiz-answer-yes)
|
|
|
|
(define-key
|
|
map
|
|
(kbd "n")
|
|
#'linuxplus-quiz-answer-no)
|
|
|
|
(define-key
|
|
map
|
|
(kbd "SPC")
|
|
#'linuxplus-quiz-toggle-multiple)
|
|
|
|
;; navigation
|
|
|
|
(define-key
|
|
map
|
|
(kbd "b")
|
|
#'linuxplus-quiz-prev)
|
|
|
|
(define-key
|
|
map
|
|
(kbd "TAB")
|
|
#'linuxplus-quiz-next)
|
|
|
|
(define-key
|
|
map
|
|
(kbd "x")
|
|
#'linuxplus-quiz-finish)
|
|
|
|
(define-key
|
|
map
|
|
(kbd "q")
|
|
#'linuxplus-quiz-return-to-lesson)
|
|
|
|
map))
|
|
|
|
(define-derived-mode
|
|
linuxplus-quiz-mode
|
|
special-mode
|
|
"LinuxPlus-Quiz"
|
|
"Major mode for Linux+ quizzes."
|
|
|
|
(setq buffer-read-only t))
|
|
|
|
(defun linuxplus-start-quiz
|
|
(lesson questions buffer)
|
|
|
|
"Start Linux+ quiz in full window."
|
|
|
|
(let ((return-config
|
|
(current-window-configuration))
|
|
|
|
(return-buffer
|
|
(current-buffer))
|
|
|
|
(buf
|
|
(get-buffer-create buffer)))
|
|
|
|
(delete-other-windows)
|
|
|
|
(switch-to-buffer buf)
|
|
|
|
(linuxplus-quiz-mode)
|
|
|
|
(setq linuxplus-quiz-return-window-configuration
|
|
return-config)
|
|
|
|
(setq linuxplus-quiz-return-buffer
|
|
return-buffer)
|
|
|
|
(setq linuxplus-quiz-lesson-name
|
|
lesson)
|
|
|
|
(setq linuxplus-quiz-questions
|
|
questions)
|
|
|
|
(setq linuxplus-quiz-user-answers
|
|
(make-list
|
|
(length questions)
|
|
nil))
|
|
|
|
(setq linuxplus-quiz-current-question 0)
|
|
|
|
(setq linuxplus-quiz-current-choice 0)
|
|
|
|
(linuxplus-quiz-render)))
|
|
|
|
;;; 06-linuxplus-quiz-mode.el ends here
|