反复清理图形，直到没有可清的内容

纯文本，没有任何隐藏内容。复制后存成名为 cxpurge.lsp 的文件，或直接下载。

;;; ============================================================================
;;; CXPURGE - Purge the drawing until nothing more goes
;;; Version 1.0.0
;;; CADXChange LISP tools - https://cadxchange.net/resources/lisp/cxpurge
;;; 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
;;; ============================================================================

;; How many entries the tables that PURGE touches hold: (blocks layers linetypes styles dimstyles).
(defun cx:purge-counts ( / out r)
  (foreach tbl '("BLOCK" "LAYER" "LTYPE" "STYLE" "DIMSTYLE")
    (setq r (tblnext tbl T) out (cons 0 out))
    (while r
      (setq out (cons (1+ (car out)) (cdr out)) r (tblnext tbl))))
  (reverse out))

;; Purge unused blocks, layers, linetypes, styles and the like until nothing more goes. Nested definitions need
;; several rounds. Returns the entries removed per table, in the order of cx:purge-counts.
(defun cx:purge-run ( / before after)
  (setq before (cx:purge-counts))
  (repeat 4
    (command "_.-PURGE" "_A" "*" "_N"))
  (setq after (cx:purge-counts))
  (mapcar '- before after))

(defun c:CXPURGE ( / *error* cx:sv r)
  (setq *error* cx:err)
  (cx:start '(("CMDECHO" . 0)))
  (setq r (cx:purge-run))
  (cx:end)
  (princ (strcat "\nRemoved: " (itoa (nth 0 r)) " blocks, " (itoa (nth 1 r)) " layers, " (itoa (nth 2 r)) " linetypes, "
                 (itoa (nth 3 r)) " text styles, " (itoa (nth 4 r)) " dimension styles."))
  (princ))


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

;; 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))

;; 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))

(princ "\nCXPURGE loaded. Type CXPURGE to start.")
(princ)

更多命令：清理

• CXBYLAYER把颜色、线型和线宽恢复为 ByLayer
• CXZEROLEN找出并删除零长度的直线和多段线
• CXEMPTYTXT找出并删除空文字
• CXFONTCHK列出字体文件缺失的文字样式
• CXFONTSUB在所有文字样式里把一个字体文件换成另一个
• CXDELTYPE删除你点选类型的所有对象
• CXDIMRESET把手改过的标注文字恢复成测量值
• CXDUPDEL删除完全重复的对象
• CXOBJCOUNT按类型统计对象数量