Line texts up with a reference text

Plain text, nothing hidden. Copy it into a file named cxtxtalign.lsp, or download it.

;;; ============================================================================
;;; CXTXTALIGN - Line up texts with a base text
;;; Version 1.0.0
;;; CADXChange LISP tools - https://cadxchange.net/resources/lisp/cxtxtalign
;;; Tested in: AutoCAD (full version). Other programs that run AutoLISP may work but are not tested.
;;; Copyright (c) CADXChange. Free for personal and commercial use; do not resell or
;;; republish it as a collection. Terms: https://cadxchange.net/legal/lisp-terms
;;; ============================================================================

;; Line up the texts in NAMES with the text BASE.
;;   MODE "Left"     the insertion points get the X of BASE (a column of left edges)
;;   MODE "Baseline" the insertion points get the Y of BASE (a row)
;;   MODE "Rotation" the texts get the rotation of BASE
;;   MODE "Height"   the texts get the height of BASE
;; Returns how many texts were changed.
(defun cx:txtalign-run (base names mode / bed bp n ed p ang)
  (setq bed (entget base) bp (cx:text-pt bed) n 0)
  (foreach e names
    (if (/= e base)
      (progn
        (setq ed (entget e) p (cx:text-pt ed))
        (cond
          ((= mode "Left") (cx:move-text e (- (car bp) (car p)) 0.0))
          ((= mode "Baseline") (cx:move-text e 0.0 (- (cadr bp) (cadr p))))
          ((= mode "Height") (cx:upd e 40 (cx:dxf 40 bed)))
          ((= mode "Rotation")
           (setq ang (cond ((and (= (cx:dxf 0 bed) "MTEXT") (cx:dxf 11 bed)) (atan (cadr (cx:dxf 11 bed)) (car (cx:dxf 11 bed))))
                           ((cx:dxf 50 bed) (cx:dxf 50 bed))
                           (T 0.0)))
           (if (= (cx:dxf 0 ed) "MTEXT")
             (progn
               (cx:upd e 11 (list (cos ang) (sin ang) 0.0))
               (if (assoc 50 (entget e)) (cx:upd e 50 ang)))
             (cx:upd e 50 ang))))
        (setq n (1+ n)))))
  n)

(defun c:CXTXTALIGN ( / *error* cx:sv r base ss mode)
  (setq *error* cx:err)
  (setq r (entsel "\nClick the text to line up with: "))
  (if (and r (member (cx:dxf 0 (entget (car r))) '("TEXT" "MTEXT")))
    (progn
      (setq base (car r))
      (if (setq ss (ssget '((0 . "TEXT,MTEXT"))))
        (progn
          (setq mode (cx:ask-kw "Line up" "Left Baseline Rotation Height" "Left"))
          (cx:start '(("CMDECHO" . 0)))
          (princ (strcat "\n" (itoa (cx:txtalign-run base (cx:ss->list ss) mode)) " text(s) changed."))
          (cx:end))))
    (if r (princ "\nThat is not a text.")))
  (princ))


;;; ---- Shared helpers (used by the command above; identical in every CADXChange tool) ----

(defun cx:dxf (code ed)
  (cdr (assoc code ed)))

;; The point a TEXT, MTEXT or ATTRIB sits at (the alignment point when it is aligned).
(defun cx:text-pt (ed)
  (if (and (member (cx:dxf 0 ed) '("TEXT" "ATTRIB" "ATTDEF"))
           (or (/= 0 (cx:dxf 72 ed)) (/= 0 (cx:dxf 73 ed)))
           (cx:dxf 11 ed))
    (cx:dxf 11 ed)
    (cx:dxf 10 ed)))

;; Move a text object by DX, DY (its insertion point and, for justified TEXT, its alignment point).
(defun cx:move-text (ename dx dy / ed p)
  (setq ed (entget ename) p (cx:dxf 10 ed))
  (setq ed (subst (list 10 (+ (car p) dx) (+ (cadr p) dy) (caddr p)) (assoc 10 ed) ed))
  (if (and (/= (cx:dxf 0 ed) "MTEXT") (assoc 11 ed) (or (/= 0 (cx:dxf 72 ed)) (/= 0 (cx:dxf 73 ed))))
    (progn
      (setq p (cx:dxf 11 ed))
      (setq ed (subst (list 11 (+ (car p) dx) (+ (cadr p) dy) (caddr p)) (assoc 11 ed) ed))))
  (entmod ed)
  (entupd ename))

;; Change one group of an entity: (cx:upd ename 8 "LAYER1"); the group is added when missing.
(defun cx:upd (ename code value / ed old)
  (setq ed (entget ename) old (assoc code ed))
  (entmod (if old (subst (cons code value) old ed) (append ed (list (cons code value)))))
  (entupd ename))

;; Close the undo step and put the system variables back.
(defun cx:end ()
  (foreach v cx:sv (setvar (car v) (cdr v)))
  (command "_.UNDO" "_End")
  (setq cx:sv nil)
  (princ))

;; Error handler: restores everything, stays quiet on Esc.
(defun cx:err (msg)
  (if (> (getvar "CMDACTIVE") 0) (command))
  (cx:end)
  (if (and msg (not (wcmatch (strcase msg) "*BREAK*,*CANCEL*,*EXIT*")))
    (princ (strcat "\nError: " msg)))
  (princ))

;; Replace every OLD in STR by NEW (case sensitive).
(defun cx:replace (str old new / n out pos)
  (setq n (strlen old) out "" pos 1)
  (if (= n 0)
    str
    (progn
      (while (<= pos (1+ (- (strlen str) n)))
        (if (= (substr str pos n) old)
          (setq out (strcat out new) pos (+ pos n))
          (setq out (strcat out (substr str pos 1)) pos (1+ pos))))
      (strcat out (substr str pos)))))

;; Ask for one of the keywords in BITS ("Yes No"), default DEF; returns the keyword.
(defun cx:ask-kw (msg bits def / v)
  (initget 0 bits)
  (setq v (getkword (strcat "\n" msg " [" (cx:replace bits " " "/") "] <" def ">: ")))
  (if v v def))

;; Save the system variables in VARS ((name . value) ...), set them, and open one undo step.
;; The caller declares cx:sv as a local so the saved values live exactly as long as the command.
(defun cx:start (vars)
  (setq cx:sv (mapcar (function (lambda (v) (cons (car v) (getvar (car v))))) vars))
  (command "_.UNDO" "_Begin")
  (foreach v vars (setvar (car v) (cdr v)))
  (princ))

;; Selection set to a list of entity names.
(defun cx:ss->list (ss / i out)
  (setq i 0)
  (if ss
    (repeat (sslength ss)
      (setq out (cons (ssname ss i) out)
            i   (1+ i))))
  (reverse out))

(princ "\nCXTXTALIGN loaded. Type CXTXTALIGN to start.")
(princ)

More commands: Text

• CXNUMNumber texts in sequence
• CXTXTADDAdd a prefix or suffix to many texts
• CXTXTCUTCut characters off the ends of texts
• CXTXTCASEChange the case of many texts
• CXTXTREPLFind and replace in many texts at once
• CXTXTCLEANClean up spaces and formatting in texts
• CXT2MMerge single-line texts into one multiline text
• CXM2TBreak multiline text into single lines
• CXTXTSTYLEChange text style and height for many texts
• CXTXTCOUNTCount identical texts
• CXTXTSUMAdd up the numbers in texts