;; Copyright (C) 2014 Free Software Foundation, Inc.
;; Author: Thien-Thi Nguyen <ttn@gnu.org>
-;; Version: 1.6
+;; Maintainer: Thien-Thi Nguyen <ttn@gnu.org>
+;; Version: 1.7
;; 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 command `aa2u' converts simple ASCII art line drawings in
;; the {active,accessible} region of the current buffer to Unicode.
+;; Command `aa2u-rectangle' is like `aa2u', but works on rectangles.
;;
;; Example use case:
;; - M-x artist-mode RET
;;
;; Much easier on the eyes now!
;;
+;; Normally, lines are drawn with the `LIGHT' weight. If you set var
+;; `aa2u-uniform-weight' to symbol `HEAVY', you will see, instead:
+;;
+;; ┏━━━━━━━━━━━━━━━┓
+;; ┃ ┃
+;; ┃ ┏━━━━━━━╋━━┓
+;; ┃ ┃ ┃ ┃
+;; ┃ ┃ ┃ ┃
+;; ┃ ┃ ┃ ┃
+;; ┗━━━━━━━╋━━━━━━━┛ ┃
+;; ┃ ┃
+;; ┃ ┃
+;; ┃ ┃
+;; ┗━━━━━━━━━━┛
+;;
;;
;; See Also
;; - HACKING: <http://git.sv.gnu.org/cgit/emacs/elpa.git/tree/packages/ascii-art-to-unicode/HACKING>
(require 'cl-lib)
(require 'pcase)
+(defvar aa2u-uniform-weight 'LIGHT
+ "A symbol, either `LIGHT' or `HEAVY'.
+This specifies the weight of all the lines.")
+
;;;---------------------------------------------------------------------------
;;; support
-(defun aa2u-ucs-bd-uniform-name (weight &rest components)
+(defun aa2u-ucs-bd-uniform-name (&rest components)
"Return a string naming UCS char w/ WEIGHT and COMPONENTS.
-The string begins with \"BOX DRAWINGS\"; followed by WEIGHT,
-a symbol from the set:
-
- HEAVY
- LIGHT
-
-followed by COMPONENTS, a list of one or two symbols from the set:
+The string begins with \"BOX DRAWINGS\"; followed by the weight
+as per variable `aa2u-uniform-weight', followed by COMPONENTS,
+a list of one or two symbols from the set:
VERTICAL
HORIZONTAL
Lastly, all words are separated by space (U+20)."
(format "BOX DRAWINGS %s %s"
- weight
+ aa2u-uniform-weight
(mapconcat 'symbol-name components
" AND ")))
(defun aa2u-phase-1 ()
(goto-char (point-min))
- (let ((vert (aa2u-1c 'aa2u-ucs-bd-uniform-name 'LIGHT 'VERTICAL)))
+ (let ((vert (aa2u-1c 'aa2u-ucs-bd-uniform-name 'VERTICAL)))
(while (search-forward "|" nil t)
(replace-match vert t t)))
(goto-char (point-min))
- (let ((horz (aa2u-1c 'aa2u-ucs-bd-uniform-name 'LIGHT 'HORIZONTAL)))
+ (let ((horz (aa2u-1c 'aa2u-ucs-bd-uniform-name 'HORIZONTAL)))
(while (search-forward "-" nil t)
(replace-match horz t t))))
;; | +---|
(eq ?+ (char-after pos))
;; Require properly directional neighborliness.
- (memq (case name
+ (memq (cl-case name
((UP DOWN) 'VERTICAL)
((LEFT RIGHT) 'HORIZONTAL))
(get-text-property pos 'aa2u-components)))
(just (&rest args) (delq nil args)))
(apply 'aa2u-1c
'aa2u-ucs-bd-uniform-name
- 'LIGHT
(just (pcase (just (v 'UP 0)
(v 'DOWN 2))
((pred two-p) 'VERTICAL)
'aa2u-components nil)))
;;;---------------------------------------------------------------------------
-;;; command
+;;; commands
;;;###autoload
(defun aa2u (beg end &optional interactive)
first, and plus is substituted with a character depending on its north,
south, east and west neighbors.
+NB: Actually, `aa2u' can also use \"HEAVY\" instead of \"LIGHT\",
+depending on the value of variable `aa2u-uniform-weight'.
+
This command operates on either the active region,
or the accessible portion otherwise."
(interactive "r\np")
(aa2u-phase-2)
(aa2u-phase-3))))
+;;;###autoload
+(defun aa2u-rectangle (start end)
+ "Like `aa2u' on the region-rectangle.
+When called from a program the rectangle's corners
+are START (top left) and END (bottom right)."
+ (interactive "r")
+ (let* ((was (delete-extract-rectangle start end))
+ (now (with-temp-buffer
+ (insert-rectangle was)
+ (aa2u (point) (mark))
+ (extract-rectangle (point-min) (point-max)))))
+ (goto-char (min start end))
+ (insert-rectangle now)))
+
;;;---------------------------------------------------------------------------
;;; that's it