(defvar array-max-column nil "Number of columns in the array.")
(defvar array-columns-per-line nil "Number of array columns per line.")
(defvar array-buffer-column nil "Current column number of point in the buffer.")
(defvar array-line-length nil "Length of a line in the array.")
(defvar array-buffer-line nil "Current line number of point in the buffer.")
(defvar array-lines-per-row nil "Number of lines per array row.")
(defvar array-max-row nil "Number of rows in the array.")
(defvar array-field-width nil "Width of a field in the array.")
(defvar array-row nil "Current array row location of point.")
(defvar array-column nil "Current array column location of point.")
(defvar array-rows-numbered nil "Are rows numbered in the buffer?")
(defvar array-copy-string nil "Current field string being copied.")
(defvar array-respect-tabs nil "Should TAB conversion be prevented?")
(defun array-cursor-in-array-range ()
"Return t if the cursor is in a valid array cell.
Its ok to be on a row number line."
(let ((columns-last-line (% array-max-column array-columns-per-line)))
(not (or
(>= array-buffer-column array-line-length)
(>= array-buffer-line (* array-lines-per-row array-max-row))
(and (zerop (% (1+ array-buffer-line) array-lines-per-row))
(not (zerop columns-last-line))
(>= array-buffer-column (* columns-last-line array-field-width)))))))
(defun array-current-row ()
"Return the array row of the field in which the cursor is located."
(and (array-cursor-in-array-range)
(1+ (floor array-buffer-line array-lines-per-row))))
(defun array-current-column ()
"Return the array column of the field in which the cursor is located."
(and (array-cursor-in-array-range)
(not (and array-rows-numbered
(zerop (% array-buffer-line array-lines-per-row))))
(+
(* array-columns-per-line
(if array-rows-numbered
(1- (% array-buffer-line array-lines-per-row))
(% array-buffer-line array-lines-per-row)))
(1+ (floor array-buffer-column array-field-width)))))
(defun array-update-array-position (&optional a-row a-column)
"Set `array-row' and `array-column' to their current values.
Set them to the optional arguments A-ROW and A-COLUMN if those are supplied."
(setq array-row (or a-row (array-current-row))
array-column (or a-column (array-current-column))))
(defun array-update-buffer-position ()
"Set `array-buffer-line' and `array-buffer-column' to their current values."
(setq array-buffer-line (current-line)
array-buffer-column (current-column)))
(defun array-what-position ()
"Display the row and column in which the cursor is positioned."
(interactive)
(let ((array-buffer-line (current-line))
(array-buffer-column (current-column)))
(message "Array row: %s Array column: %s"
(prin1-to-string (array-current-row))
(prin1-to-string (array-current-column)))))
(defun array-display-local-variables ()
"Display the current state of the local variables in the minibuffer."
(interactive)
(let ((buf (buffer-name (current-buffer))))
(with-output-to-temp-buffer "*Local Variables*"
(buffer-disable-undo standard-output)
(terpri)
(princ (format " Buffer: %s\n\n" buf))
(princ (format " max-row: %s\n"
(prin1-to-string array-max-row)))
(princ (format " max-column: %s\n"
(prin1-to-string array-max-column)))
(princ (format " columns-per-line: %s\n"
(prin1-to-string array-columns-per-line)))
(princ (format " field-width: %s\n"
(prin1-to-string array-field-width)))
(princ (format " rows-numbered: %s\n"
(prin1-to-string array-rows-numbered)))
(princ (format " lines-per-row: %s\n"
(prin1-to-string array-lines-per-row)))
(princ (format " line-length: %s\n"
(prin1-to-string array-line-length))))))
(defun array-beginning-of-field (&optional go-there)
"Return the column of the beginning of the current field.
Optional argument GO-THERE, if non-nil, means go there too."
(let ((goal-column (- array-buffer-column (% array-buffer-column array-field-width))))
(if go-there
(move-to-column-untabify goal-column)
goal-column)))
(defun array-end-of-field (&optional go-there)
"Return the column of the end of the current array field.
If optional argument GO-THERE is non-nil, go there too."
(let ((goal-column (+ (- array-buffer-column (% array-buffer-column array-field-width))
array-field-width)))
(if go-there
(move-to-column-untabify goal-column)
goal-column)))
(defun array-move-to-cell (a-row a-column)
"Move to array row A-ROW and array column A-COLUMN.
Leave point at the beginning of the field and return the new buffer column."
(let ((goal-line (+ (* array-lines-per-row (1- a-row))
(if array-rows-numbered 1 0)
(floor (1- a-column) array-columns-per-line)))
(goal-column (* array-field-width (% (1- a-column) array-columns-per-line))))
(goto-char (point-min))
(forward-line goal-line)
(move-to-column-untabify goal-column)))
(defun array-move-to-row (a-row)
"Move to array row A-ROW preserving the current array column.
Leave point at the beginning of the field and return the new array row."
(let ((goal-line (+ (* array-lines-per-row (1- a-row))
(% array-buffer-line array-lines-per-row)))
(goal-column (- array-buffer-column (% array-buffer-column array-field-width))))
(forward-line (- goal-line array-buffer-line))
(move-to-column-untabify goal-column)
a-row))
(defun array-move-to-column (a-column)
"Move to array column A-COLUMN preserving the current array row.
Leave point at the beginning of the field and return the new array column."
(let ((goal-line (+ (- array-buffer-line (% array-buffer-line array-lines-per-row))
(if array-rows-numbered 1 0)
(floor (1- a-column) array-columns-per-line)))
(goal-column (* array-field-width (% (1- a-column) array-columns-per-line))))
(forward-line (- goal-line array-buffer-line))
(move-to-column-untabify goal-column)
a-column))
(defun array-move-one-row (sign)
"Move one array row in direction SIGN (1 or -1).
Leave point at the beginning of the field and return the new array row.
If requested to move beyond the array bounds, signal an error."
(let ((goal-column (array-beginning-of-field))
(array-row (or (array-current-row)
(error "Cursor is not in a valid array cell"))))
(cond ((and (= array-row array-max-row) (= sign 1))
(error "End of array"))
((and (= array-row 1) (= sign -1))
(error "Beginning of array"))
(t
(progn
(forward-line (* sign array-lines-per-row))
(move-to-column-untabify goal-column)
(+ array-row sign))))))
(defun array-move-one-column (sign)
"Move one array column in direction SIGN (1 or -1).
Leave point at the beginning of the field and return the new array column.
If requested to move beyond the array bounds, signal an error."
(let ((array-column (or (array-current-column)
(error "Cursor is not in a valid array cell"))))
(cond ((and (= array-column array-max-column) (= sign 1))
(error "End of array"))
((and (= array-column 1) (= sign -1))
(error "Beginning of array"))
(t
(cond
((and (= sign -1) (= 1 (% array-column array-columns-per-line)))
(forward-line -1)
(move-to-column-untabify
(* array-field-width (1- array-columns-per-line))))
((and (= sign 1) (zerop (% array-column array-columns-per-line)))
(forward-line 1))
(t
(move-to-column-untabify (+ (array-beginning-of-field)
(* array-field-width sign)))))
(+ array-column sign)))))
(defun array-normalize-cursor ()
"Move the cursor to the first non-whitespace character in the field.
If necessary, scroll horizontally to keep the cursor in view."
(let ((array-buffer-column (current-column)))
(skip-chars-forward " \t"
(1- (save-excursion (array-end-of-field t) (point))))
(array-maybe-scroll-horizontally)))
(defun array-maybe-scroll-horizontally ()
"If necessary, scroll horizontally to keep the cursor in view."
(let ((w-hscroll (window-hscroll))
(w-width (window-width)))
(cond
((and (>= array-buffer-column w-hscroll)
(<= array-buffer-column (+ w-hscroll w-width)))
nil)
((> array-buffer-column (+ w-hscroll w-width))
(scroll-left (- (- array-buffer-column w-hscroll)
(/ w-width 2))))
(t
(scroll-right (+ (- w-hscroll array-buffer-column)
(/ w-width 2)))))))
(defun array-next-row (&optional arg)
"Move down one array row, staying in the current array column.
If optional ARG is given, move down ARG array rows."
(interactive "p")
(let ((array-buffer-line (current-line))
(array-buffer-column (current-column)))
(if (= (abs arg) 1)
(array-move-one-row arg)
(array-move-to-row
(limit-index (+ (or (array-current-row)
(error "Cursor is not in an array cell"))
arg)
array-max-row))))
(array-normalize-cursor))
(defun array-previous-row (&optional arg)
"Move up one array row, staying in the current array column.
If optional ARG is given, move up ARG array rows."
(interactive "p")
(array-next-row (- arg)))
(defun array-forward-column (&optional arg)
"Move forward one field, staying in the current array row.
If optional ARG is given, move forward ARG array columns.
If necessary, keep the cursor in the window by scrolling right or left."
(interactive "p")
(let ((array-buffer-line (current-line))
(array-buffer-column (current-column)))
(if (= (abs arg) 1)
(array-move-one-column arg)
(array-move-to-column
(limit-index (+ (or (array-current-column)
(error "Cursor is not in an array cell"))
arg)
array-max-column))))
(array-normalize-cursor))
(defun array-backward-column (&optional arg)
"Move backward one field, staying in the current array row.
If optional ARG is given, move backward ARG array columns.
If necessary, keep the cursor in the window by scrolling right or left."
(interactive "p")
(array-forward-column (- arg)))
(defun array-goto-cell (a-row a-column)
"Go to array row A-ROW and array column A-COLUMN."
(interactive "nArray row: \nnArray column: ")
(array-move-to-cell
(limit-index a-row array-max-row)
(limit-index a-column array-max-column))
(array-normalize-cursor))
(defun array-field-string ()
"Return the field string at the current cursor location."
(buffer-substring
(save-excursion (array-beginning-of-field t) (point))
(save-excursion (array-end-of-field t) (point))))
(defun array-copy-once-vertically (sign)
"Copy the current field into one array row in direction SIGN (1 or -1).
Leave point at the beginning of the field and return the new array row.
If requested to move beyond the array bounds, signal an error."
(let ((a-row (array-move-one-row sign)))
(let ((inhibit-quit t))
(delete-region (point) (save-excursion (array-end-of-field t) (point)))
(insert array-copy-string))
(move-to-column array-buffer-column)
a-row))
(defun array-copy-once-horizontally (sign)
"Copy the current field into one array column in direction SIGN (1 or -1).
Leave point at the beginning of the field and return the new array column.
If requested to move beyond the array bounds, signal an error."
(let ((a-column (array-move-one-column sign)))
(array-update-buffer-position)
(let ((inhibit-quit t))
(delete-region (point) (save-excursion (array-end-of-field t) (point)))
(insert array-copy-string))
(move-to-column array-buffer-column)
a-column))
(defun array-copy-to-row (a-row)
"Copy the current field vertically into every cell up to and including A-ROW.
Leave point at the beginning of the field."
(let* ((num (- a-row array-row))
(count (abs num))
(sign (if (zerop count) () (/ num count))))
(while (> count 0)
(array-move-one-row sign)
(array-update-buffer-position)
(let ((inhibit-quit t))
(delete-region (point) (save-excursion (array-end-of-field t) (point)))
(insert array-copy-string))
(move-to-column array-buffer-column)
(setq count (1- count)))))
(defun array-copy-to-column (a-column)
"Copy current field horizontally into every cell up to and including A-COLUMN.
Leave point at the beginning of the field."
(let* ((num (- a-column array-column))
(count (abs num))
(sign (if (zerop count) () (/ num count))))
(while (> count 0)
(array-move-one-column sign)
(array-update-buffer-position)
(let ((inhibit-quit t))
(delete-region (point) (save-excursion (array-end-of-field t) (point)))
(insert array-copy-string))
(move-to-column array-buffer-column)
(setq count (1- count)))))
(defun array-copy-to-cell (a-row a-column)
"Copy the current field into the cell at A-ROW, A-COLUMN.
Leave point at the beginning of the field."
(array-move-to-cell a-row a-column)
(array-update-buffer-position)
(delete-region (point) (save-excursion (array-end-of-field t) (point)))
(insert array-copy-string)
(move-to-column array-buffer-column))
(defun array-copy-down (&optional arg)
"Copy the current field one array row down.
If optional ARG is given, copy down through ARG array rows."
(interactive "p")
(let* ((array-buffer-line (current-line))
(array-buffer-column (current-column))
(array-row (or (array-current-row)
(error "Cursor is not in a valid array cell")))
(array-copy-string (array-field-string)))
(if (= (abs arg) 1)
(array-copy-once-vertically arg)
(array-copy-to-row
(limit-index (+ array-row arg) array-max-row))))
(array-normalize-cursor))
(defun array-copy-up (&optional arg)
"Copy the current field one array row up.
If optional ARG is given, copy up through ARG array rows."
(interactive "p")
(array-copy-down (- arg)))
(defun array-copy-forward (&optional arg)
"Copy the current field one array column to the right.
If optional ARG is given, copy through ARG array columns to the right."
(interactive "p")
(let* ((array-buffer-line (current-line))
(array-buffer-column (current-column))
(array-column (or (array-current-column)
(error "Cursor is not in a valid array cell")))
(array-copy-string (array-field-string)))
(if (= (abs arg) 1)
(array-copy-once-horizontally arg)
(array-copy-to-column
(limit-index (+ array-column arg) array-max-column))))
(array-normalize-cursor))
(defun array-copy-backward (&optional arg)
"Copy the current field one array column to the left.
If optional ARG is given, copy through ARG array columns to the left."
(interactive "p")
(array-copy-forward (- arg)))
(defun array-copy-column-forward (&optional arg)
"Copy the entire current column in to the column to the right.
If optional ARG is given, copy through ARG array columns to the right."
(interactive "p")
(array-update-buffer-position)
(array-update-array-position)
(if (not array-column)
(error "Cursor is not in a valid array cell"))
(message "Working...")
(let ((this-row 0))
(while (< this-row array-max-row)
(setq this-row (1+ this-row))
(array-move-to-cell this-row array-column)
(array-update-buffer-position)
(let ((array-copy-string (array-field-string)))
(if (= (abs arg) 1)
(array-copy-once-horizontally arg)
(array-copy-to-column
(limit-index (+ array-column arg) array-max-column))))))
(message "Working...done")
(array-move-to-row array-row)
(array-normalize-cursor))
(defun array-copy-column-backward (&optional arg)
"Copy the entire current column one column to the left.
If optional ARG is given, copy through ARG columns to the left."
(interactive "p")
(array-copy-column-forward (- arg)))
(defun array-copy-row-down (&optional arg)
"Copy the entire current row one row down.
If optional ARG is given, copy through ARG rows down."
(interactive "p")
(array-update-buffer-position)
(array-update-array-position)
(if (not array-row)
(error "Cursor is not in a valid array cell"))
(cond
((and (= array-row 1) (= arg -1))
(error "Beginning of array"))
((and (= array-row array-max-row) (= arg 1))
(error "End of array"))
(t
(let* ((array-copy-string
(buffer-substring
(save-excursion (array-move-to-cell array-row 1)
(point))
(save-excursion (array-move-to-cell array-row array-max-column)
(forward-line 1)
(point))))
(this-row array-row)
(goal-row (limit-index (+ this-row arg) array-max-row))
(num (- goal-row this-row))
(count (abs num))
(sign (if (not (zerop count)) (/ num count))))
(while (> count 0)
(setq this-row (+ this-row sign))
(array-move-to-cell this-row 1)
(let ((inhibit-quit t))
(delete-region (point)
(save-excursion
(array-move-to-cell this-row array-max-column)
(forward-line 1)
(point)))
(insert array-copy-string))
(setq count (1- count)))
(array-move-to-cell goal-row (or array-column 1)))))
(array-normalize-cursor))
(defun array-copy-row-up (&optional arg)
"Copy the entire current array row into the row above.
If optional ARG is given, copy through ARG rows up."
(interactive "p")
(array-copy-row-down (- arg)))
(defun array-fill-rectangle ()
"Copy the field at mark into every cell between mark and point."
(interactive)
(array-update-buffer-position)
(let ((p-row (or (array-current-row)
(error "Cursor is not in a valid array cell")))
(p-column (or (array-current-column)
(error "Cursor is not in a valid array cell")))
(m-row
(save-excursion
(exchange-point-and-mark)
(array-update-buffer-position)
(or (array-current-row)
(error "Mark is not in a valid array cell"))))
(m-column
(save-excursion
(exchange-point-and-mark)
(array-update-buffer-position)
(or (array-current-column)
(error "Mark is not in a valid array cell")))))
(message "Working...")
(let ((top-row (min m-row p-row))
(bottom-row (max m-row p-row))
(left-column (min m-column p-column))
(right-column (max m-column p-column)))
(let ((array-copy-string
(save-excursion
(array-move-to-cell m-row m-column)
(array-update-buffer-position)
(array-field-string))))
(array-copy-to-cell top-row left-column)
(array-update-array-position top-row left-column)
(array-update-buffer-position)
(array-copy-to-column right-column))
(array-move-to-cell top-row left-column)
(let ((array-copy-string
(buffer-substring
(point)
(save-excursion
(array-move-to-cell top-row right-column)
(setq array-buffer-column (current-column))
(array-end-of-field t)
(point))))
(this-row top-row))
(while (/= this-row bottom-row)
(setq this-row (1+ this-row))
(array-move-to-cell this-row left-column)
(let ((inhibit-quit t))
(delete-region
(point)
(save-excursion
(array-move-to-cell this-row right-column)
(setq array-buffer-column (current-column))
(array-end-of-field t)
(point)))
(insert array-copy-string)))))
(message "Working...done")
(array-goto-cell p-row p-column)))
(defun array-make-template ()
"Create the template of an array."
(interactive)
(let ((check t)
(len)
init-field)
(while check
(setq init-field (read-string "Initial field value: "))
(setq len (length init-field))
(if (/= len array-field-width)
(if (y-or-n-p (format "Change field width to %d? " len))
(progn (setq array-field-width len)
(setq check nil)))
(setq check nil)))
(goto-char (point-min))
(message "Working...")
(let ((this-row 1))
(while (<= this-row array-max-row)
(if array-rows-numbered
(insert (format "%d:\n" this-row)))
(let ((this-column 1))
(while (<= this-column array-max-column)
(insert init-field)
(if (and (zerop (% this-column array-columns-per-line))
(/= this-column array-max-column))
(newline))
(setq this-column (1+ this-column))))
(setq this-row (1+ this-row))
(newline)))
(message "Working...done"))
(array-goto-cell 1 1))
(defun array-reconfigure-rows (new-columns-per-line new-rows-numbered)
"Reconfigure the state of `array-rows-numbered' and `array-columns-per-line'.
NEW-COLUMNS-PER-LINE is the desired value of `array-columns-per-line' and
NEW-ROWS-NUMBERED (a character, either ?y or ?n) is the desired value
of `array-rows-numbered'."
(interactive "nColumns per line: \ncRows numbered? (y or n) ")
(let ((check t))
(while check
(if (and (>= new-columns-per-line 1)
(<= new-columns-per-line array-max-column))
(setq check nil)
(setq new-columns-per-line
(string-to-number
(read-string
(format "Columns per line (1 - %d): " array-max-column)))))))
(cond
((eq new-rows-numbered ?y)
(setq new-rows-numbered t))
((eq new-rows-numbered ?n)
(setq new-rows-numbered nil))
(t
(setq new-rows-numbered (y-or-n-p "Rows numbered? "))))
(message "Working...")
(array-update-buffer-position)
(let* ((main-buffer (buffer-name (current-buffer)))
(temp-buffer (generate-new-buffer " *Array*"))
(temp-max-row array-max-row)
(temp-max-column array-max-column)
(old-rows-numbered array-rows-numbered)
(old-columns-per-line array-columns-per-line)
(old-lines-per-row array-lines-per-row)
(old-field-width array-field-width)
(old-line-length array-line-length)
(this-row 1))
(array-update-array-position)
(copy-to-buffer temp-buffer (point-min) (point-max))
(set-buffer temp-buffer)
(goto-char (point-min))
(while (<= this-row temp-max-row)
(cond
((or (and old-rows-numbered new-rows-numbered)
(and (not old-rows-numbered) (not new-rows-numbered)))
())
((and old-rows-numbered (not new-rows-numbered))
(kill-line 1))
(t
(insert (format "%d:\n" this-row))))
(cond
((= old-columns-per-line new-columns-per-line)
(forward-line (- old-lines-per-row (if old-rows-numbered 1 0))))
(t
(let ((newlines-to-be-removed
(floor (1- temp-max-column) old-columns-per-line))
(newlines-removed 0)
(newlines-to-be-added
(floor (1- temp-max-column) new-columns-per-line))
(newlines-added 0))
(while (< newlines-removed newlines-to-be-removed)
(move-to-column-untabify
(* (1+ newlines-removed) old-line-length))
(kill-line 1)
(setq newlines-removed (1+ newlines-removed)))
(beginning-of-line)
(while (< newlines-added newlines-to-be-added)
(move-to-column-untabify (* old-field-width new-columns-per-line))
(newline)
(setq newlines-added (1+ newlines-added)))
(forward-line 1))))
(setq this-row (1+ this-row)))
(let ((inhibit-quit t))
(set-buffer main-buffer)
(erase-buffer)
(insert-buffer-substring temp-buffer)
(setq array-columns-per-line new-columns-per-line)
(setq array-rows-numbered new-rows-numbered)
(setq array-line-length (* old-field-width new-columns-per-line))
(setq array-lines-per-row
(+ (floor (1- temp-max-column) new-columns-per-line)
(if new-rows-numbered 2 1)))
(array-goto-cell (or array-row 1) (or array-column 1)))
(kill-buffer temp-buffer))
(message "Working...done"))
(defun array-expand-rows ()
"Expand the rows so each fits on one line and remove row numbers."
(interactive)
(array-reconfigure-rows array-max-column ?n))
(defun limit-index (index limit)
(cond ((< index 1) 1)
((> index limit) limit)
(t index)))
(defun xor (pred1 pred2)
"Return the logical exclusive or of predicates PRED1 and PRED2."
(and (or pred1 pred2)
(not (and pred1 pred2))))
(defun current-line ()
"Return the current buffer line at point. The first line is 0."
(save-excursion
(beginning-of-line)
(count-lines (point-min) (point))))
(defun move-to-column-untabify (column)
"Move to COLUMN on the current line, untabifying if necessary.
Return COLUMN."
(or (and (= column (move-to-column column))
column)
(if array-respect-tabs
(error "There is a TAB character in the way")
(progn
(untabify-backward)
(move-to-column column)))))
(defun untabify-backward ()
"Untabify the preceding TAB."
(save-excursion
(let ((start (point)))
(backward-char 1)
(untabify (point) start))))
(defvar array-mode-map nil
"Keymap used in array mode.")
(if array-mode-map
()
(setq array-mode-map (make-keymap))
(define-key array-mode-map "\M-ad" 'array-display-local-variables)
(define-key array-mode-map "\M-am" 'array-make-template)
(define-key array-mode-map "\M-ae" 'array-expand-rows)
(define-key array-mode-map "\M-ar" 'array-reconfigure-rows)
(define-key array-mode-map "\M-a=" 'array-what-position)
(define-key array-mode-map "\M-ag" 'array-goto-cell)
(define-key array-mode-map "\M-af" 'array-fill-rectangle)
(define-key array-mode-map "\C-n" 'array-next-row)
(define-key array-mode-map "\C-p" 'array-previous-row)
(define-key array-mode-map "\C-f" 'array-forward-column)
(define-key array-mode-map "\C-b" 'array-backward-column)
(define-key array-mode-map "\M-n" 'array-copy-down)
(define-key array-mode-map "\M-p" 'array-copy-up)
(define-key array-mode-map "\M-f" 'array-copy-forward)
(define-key array-mode-map "\M-b" 'array-copy-backward)
(define-key array-mode-map "\M-\C-n" 'array-copy-row-down)
(define-key array-mode-map "\M-\C-p" 'array-copy-row-up)
(define-key array-mode-map "\M-\C-f" 'array-copy-column-forward)
(define-key array-mode-map "\M-\C-b" 'array-copy-column-backward))
(put 'array-mode 'mode-class 'special)
(defun array-mode ()
"Major mode for editing arrays.
Array mode is a specialized mode for editing arrays. An array is
considered to be a two-dimensional set of strings. The strings are
NOT recognized as integers or real numbers.
The array MUST reside at the top of the buffer.
TABs are not respected, and may be converted into spaces at any time.
Setting the variable `array-respect-tabs' to non-nil will prevent TAB conversion,
but will cause many functions to give errors if they encounter one.
Upon entering array mode, you will be prompted for the values of
several variables. Others will be calculated based on the values you
supply. These variables are all local to the buffer. Other buffer
in array mode may have different values assigned to the variables.
The variables are:
Variables you assign:
array-max-row: The number of rows in the array.
array-max-column: The number of columns in the array.
array-columns-per-line: The number of columns in the array per line of buffer.
array-field-width: The width of each field, in characters.
array-rows-numbered: A logical variable describing whether to ignore
row numbers in the buffer.
Variables which are calculated:
array-line-length: The number of characters in a buffer line.
array-lines-per-row: The number of buffer lines used to display each row.
The following commands are available (an asterisk indicates it may
take a numeric prefix argument):
* \\<array-mode-map>\\[array-forward-column] Move forward one column.
* \\[array-backward-column] Move backward one column.
* \\[array-next-row] Move down one row.
* \\[array-previous-row] Move up one row.
* \\[array-copy-forward] Copy the current field into the column to the right.
* \\[array-copy-backward] Copy the current field into the column to the left.
* \\[array-copy-down] Copy the current field into the row below.
* \\[array-copy-up] Copy the current field into the row above.
* \\[array-copy-column-forward] Copy the current column into the column to the right.
* \\[array-copy-column-backward] Copy the current column into the column to the left.
* \\[array-copy-row-down] Copy the current row into the row below.
* \\[array-copy-row-up] Copy the current row into the row above.
\\[array-fill-rectangle] Copy the field at mark into every cell with row and column
between that of point and mark.
\\[array-what-position] Display the current array row and column.
\\[array-goto-cell] Go to a particular array cell.
\\[array-make-template] Make a template for a new array.
\\[array-reconfigure-rows] Reconfigure the array.
\\[array-expand-rows] Expand the array (remove row numbers and
newlines inside rows)
\\[array-display-local-variables] Display the current values of local variables.
Entering array mode calls the function `array-mode-hook'."
(interactive)
(kill-all-local-variables)
(make-local-variable 'array-buffer-line)
(make-local-variable 'array-buffer-column)
(make-local-variable 'array-row)
(make-local-variable 'array-column)
(make-local-variable 'array-copy-string)
(set (make-local-variable 'array-respect-tabs) nil)
(set (make-local-variable 'array-max-row)
(read-number "Number of array rows: "))
(set (make-local-variable 'array-max-column)
(read-number "Number of array columns: "))
(set (make-local-variable 'array-columns-per-line)
(read-number "Array columns per line: "))
(set (make-local-variable 'array-field-width)
(read-number "Field width: "))
(set (make-local-variable 'array-rows-numbered)
(y-or-n-p "Rows numbered? "))
(set (make-local-variable 'array-line-length)
(* array-field-width array-columns-per-line))
(set (make-local-variable 'array-lines-per-row)
(+ (floor (1- array-max-column) array-columns-per-line)
(if array-rows-numbered 2 1)))
(message "")
(setq major-mode 'array-mode)
(setq mode-name "Array")
(force-mode-line-update)
(set (make-local-variable 'truncate-lines) t)
(setq overwrite-mode 'overwrite-mode-textual)
(use-local-map array-mode-map)
(run-mode-hooks 'array-mode-hook))
(provide 'array)