mirror of
https://git.savannah.gnu.org/git/emacs.git
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206dd9d592
* lisp/allout-widgets.el (allout-widgets-adjusting-message) (allout-widgets-exposure-change-processor) (allout-widgets-count-buttons-in-region): * lisp/ansi-color.el (ansi-color-make-color-map): * lisp/case-table.el (describe-buffer-case-table): * lisp/emacs-lisp/byte-opt.el (byte-decompile-bytecode-1): * lisp/gnus/gnus-agent.el (gnus-agent-regenerate-group): * lisp/gnus/nnir.el (nnir-run-swish++, nnir-run-swish-e) (nnir-run-hyrex, nnir-run-namazu): * lisp/hippie-exp.el (make-hippie-expand-function) (try-complete-lisp-symbol, try-complete-lisp-symbol-partially) (try-expand-all-abbrevs): * lisp/international/mule-cmds.el (sort-coding-systems) (select-safe-coding-system, select-message-coding-system) (read-language-name, encoded-string-description): * lisp/international/quail.el (quail-keyseq-translate) (quail-get-translations, quail-build-decode-map) (quail-insert-decode-map): * lisp/jka-compr.el (jka-compr-uninstall): * lisp/locate.el (locate-in-alternate-database): * lisp/mail/mailabbrev.el (mail-resolve-all-aliases-1) (mail-abbrev-make-syntax-table): * lisp/mh-e/mh-seq.el (mh-read-folder-sequences): * lisp/net/eudcb-ldap.el (eudc-ldap-simple-query-internal): * lisp/progmodes/make-mode.el (makefile-query-targets) (makefile-prompt-for-gmake-funargs): * lisp/shadowfile.el (shadow-cancel, shadow-shadows-of): * lisp/sort.el (sort-pages, sort-fields, sort-regexp-fields): * lisp/subr.el (listify-key-sequence): * lisp/term/wyse50.el (terminal-init-wyse50): * lisp/textmodes/ispell.el (ispell-help) (ispell-begin-tex-skip-regexp): * lisp/textmodes/page-ext.el (pages-sort-region): * lisp/textmodes/refer.el (refer-find-entry-in-file): * lisp/url/url-expand.el (url-expand-file-name): Don't quote lambdas.
648 lines
24 KiB
EmacsLisp
648 lines
24 KiB
EmacsLisp
;;; sort.el --- commands to sort text in an Emacs buffer -*- lexical-binding: t -*-
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;; Copyright (C) 1986-1987, 1994-1995, 2001-2020 Free Software
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;; Foundation, Inc.
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;; Author: Howie Kaye
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: unix
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This package provides the sorting facilities documented in the Emacs
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;; user's manual.
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;;; Code:
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(defgroup sort nil
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"Commands to sort text in an Emacs buffer."
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:group 'data)
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(defcustom sort-fold-case nil
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"Non-nil if the buffer sort functions should ignore case."
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:group 'sort
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:type 'boolean)
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;;;###autoload(put 'sort-fold-case 'safe-local-variable 'booleanp)
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;;;###autoload
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(defun sort-subr (reverse nextrecfun endrecfun
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&optional startkeyfun endkeyfun predicate)
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"General text sorting routine to divide buffer into records and sort them.
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We divide the accessible portion of the buffer into disjoint pieces
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called sort records. A portion of each sort record (perhaps all of
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it) is designated as the sort key. The records are rearranged in the
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buffer in order by their sort keys. The records may or may not be
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contiguous.
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Usually the records are rearranged in order of ascending sort key.
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If REVERSE is non-nil, they are rearranged in order of descending sort key.
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The variable `sort-fold-case' determines whether alphabetic case affects
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the sort order.
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The next four arguments are functions to be called to move point
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across a sort record. They will be called many times from within sort-subr.
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NEXTRECFUN is called with point at the end of the previous record.
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It moves point to the start of the next record.
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It should move point to the end of the buffer if there are no more records.
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The first record is assumed to start at the position of point when sort-subr
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is called.
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ENDRECFUN is called with point within the record.
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It should move point to the end of the record.
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STARTKEYFUN moves from the start of the record to the start of the key.
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It may return either a non-nil value to be used as the key, or
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else the key is the substring between the values of point after
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STARTKEYFUN and ENDKEYFUN are called. If STARTKEYFUN is nil, the key
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starts at the beginning of the record.
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ENDKEYFUN moves from the start of the sort key to the end of the sort key.
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ENDKEYFUN may be nil if STARTKEYFUN returns a value or if it would be the
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same as ENDRECFUN.
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PREDICATE, if non-nil, is the predicate function for comparing
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keys; it is called with two arguments, the keys to compare, and
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should return non-nil if the first key should sort before the
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second key. If PREDICATE is nil, comparison is done with `<' if
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the keys are numbers, with `compare-buffer-substrings' if the
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keys are cons cells (the car and cdr of each cons cell are taken
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as start and end positions), and with `string<' otherwise."
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;; Heuristically try to avoid messages if sorting a small amt of text.
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(let ((messages (> (- (point-max) (point-min)) 50000)))
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(save-excursion
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(if messages (message "Finding sort keys..."))
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(let* ((sort-lists (sort-build-lists nextrecfun endrecfun
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startkeyfun endkeyfun))
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(old (reverse sort-lists))
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(case-fold-search sort-fold-case))
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(if (null sort-lists)
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()
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(or reverse (setq sort-lists (nreverse sort-lists)))
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(if messages (message "Sorting records..."))
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(setq sort-lists
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(sort sort-lists
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(cond (predicate
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`(lambda (a b) (,predicate (car a) (car b))))
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((numberp (car (car sort-lists)))
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'car-less-than-car)
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((consp (car (car sort-lists)))
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(lambda (a b)
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(> 0 (compare-buffer-substrings
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nil (car (car a)) (cdr (car a))
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nil (car (car b)) (cdr (car b))))))
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(t
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(lambda (a b) (string< (car a) (car b)))))))
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(if reverse (setq sort-lists (nreverse sort-lists)))
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(if messages (message "Reordering buffer..."))
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(sort-reorder-buffer sort-lists old)))
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(if messages (message "Reordering buffer... Done"))))
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nil)
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;; Parse buffer into records using the arguments as Lisp expressions;
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;; return a list of records. Each record looks like (KEY STARTPOS . ENDPOS)
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;; where KEY is the sort key (a number or string),
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;; and STARTPOS and ENDPOS are the bounds of this record in the buffer.
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;; The records appear in the list lastmost first!
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(defun sort-build-lists (nextrecfun endrecfun startkeyfun endkeyfun)
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(let ((sort-lists ())
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(start-rec nil)
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done key)
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;; Loop over sort records.
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;(goto-char (point-min)) -- it is the caller's responsibility to
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;arrange this if necessary
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(while (not (eobp))
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(setq start-rec (point)) ;save record start
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(setq done nil)
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;; Get key value, or move to start of key.
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(setq key (catch 'key
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(or (and startkeyfun (funcall startkeyfun))
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;; If key was not returned as value,
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;; move to end of key and get key from the buffer.
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(let ((start (point)))
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(funcall (or endkeyfun
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(prog1 endrecfun (setq done t))))
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(cons start (point))))))
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;; Move to end of this record (start of next one, or end of buffer).
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(cond ((prog1 done (setq done nil)))
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(endrecfun (funcall endrecfun))
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(nextrecfun (funcall nextrecfun) (setq done t)))
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(if key (push
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;; consing optimization in case in which key is same as record.
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(if (and (consp key)
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(equal (car key) start-rec)
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(equal (cdr key) (point)))
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(cons key key)
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(cons key (cons start-rec (point))))
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sort-lists))
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(and (not done) nextrecfun (funcall nextrecfun)))
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sort-lists))
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(defun sort-reorder-buffer (sort-lists old)
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(let ((last (point-min))
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(min (point-min)) (max (point-max))
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(old-buffer (current-buffer))
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(mb enable-multibyte-characters)
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temp-buffer)
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(with-temp-buffer
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(set-buffer-multibyte mb)
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;; Record the temporary buffer.
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(setq temp-buffer (current-buffer))
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;; Copy the sorted text into the temporary buffer.
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(while sort-lists
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(goto-char (point-max))
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(insert-buffer-substring old-buffer
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last
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(nth 1 (car old)))
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(goto-char (point-max))
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(insert-buffer-substring old-buffer
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(nth 1 (car sort-lists))
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(cdr (cdr (car sort-lists))))
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(setq last (cdr (cdr (car old)))
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sort-lists (cdr sort-lists)
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old (cdr old)))
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(goto-char (point-max))
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(insert-buffer-substring old-buffer last max)
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;; Copy the reordered text from the temporary buffer
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;; to the buffer we sorted (OLD-BUFFER).
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(set-buffer old-buffer)
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(let ((inhibit-quit t))
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;; Make sure insertions done for reordering
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;; saves any markers at the end of the sorted region,
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;; by leaving the last character of the region.
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(delete-region min (1- max))
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;; Now replace the one remaining old character with the sorted text.
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(goto-char (point-min))
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(insert-buffer-substring temp-buffer)
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(delete-region max (1+ max))))))
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;;;###autoload
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(defun sort-lines (reverse beg end)
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"Sort lines in region alphabetically; REVERSE non-nil means descending order.
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Interactively, REVERSE is the prefix argument, and BEG and END are the region.
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Called from a program, there are three arguments:
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REVERSE (non-nil means reverse order), BEG and END (region to sort).
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The variable `sort-fold-case' determines whether alphabetic case affects
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the sort order."
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(interactive "P\nr")
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(save-excursion
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(save-restriction
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(narrow-to-region beg end)
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(goto-char (point-min))
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(let ;; To make `end-of-line' and etc. to ignore fields.
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((inhibit-field-text-motion t))
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(sort-subr reverse 'forward-line 'end-of-line)))))
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;;;###autoload
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(defun sort-paragraphs (reverse beg end)
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"Sort paragraphs in region alphabetically; argument means descending order.
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Called from a program, there are three arguments:
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REVERSE (non-nil means reverse order), BEG and END (region to sort).
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The variable `sort-fold-case' determines whether alphabetic case affects
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the sort order."
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(interactive "P\nr")
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(save-excursion
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(save-restriction
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(narrow-to-region beg end)
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(goto-char (point-min))
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(sort-subr reverse
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(lambda ()
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(while (and (not (eobp)) (looking-at paragraph-separate))
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(forward-line 1)))
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(lambda ()
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(forward-paragraph)
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;; If the buffer doesn't end with a newline, add a
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;; newline to avoid having paragraphs being
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;; concatenated after sorting.
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(when (and (eobp)
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(not (bolp)))
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(insert "\n")))))))
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;;;###autoload
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(defun sort-pages (reverse beg end)
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"Sort pages in region alphabetically; argument means descending order.
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Called from a program, there are three arguments:
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REVERSE (non-nil means reverse order), BEG and END (region to sort).
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The variable `sort-fold-case' determines whether alphabetic case affects
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the sort order."
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(interactive "P\nr")
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(save-excursion
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(save-restriction
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(narrow-to-region beg end)
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(goto-char (point-min))
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(sort-subr reverse
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(lambda () (skip-chars-forward "\n"))
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'forward-page))))
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(defvar sort-fields-syntax-table nil)
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(if sort-fields-syntax-table nil
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(let ((table (make-syntax-table))
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(i 0))
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(while (< i 256)
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(modify-syntax-entry i "w" table)
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(setq i (1+ i)))
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(modify-syntax-entry ?\s " " table)
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(modify-syntax-entry ?\t " " table)
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(modify-syntax-entry ?\n " " table)
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(modify-syntax-entry ?\. "_" table) ; for floating pt. numbers. -wsr
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(setq sort-fields-syntax-table table)))
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(defcustom sort-numeric-base 10
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"The default base used by `sort-numeric-fields'."
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:group 'sort
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:type 'integer)
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;;;###autoload(put 'sort-numeric-base 'safe-local-variable 'integerp)
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;;;###autoload
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(defun sort-numeric-fields (field beg end)
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"Sort lines in region numerically by the ARGth field of each line.
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Fields are separated by whitespace and numbered from 1 up.
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Specified field must contain a number in each line of the region,
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which may begin with \"0x\" or \"0\" for hexadecimal and octal values.
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Otherwise, the number is interpreted according to sort-numeric-base.
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With a negative arg, sorts by the ARGth field counted from the right.
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Called from a program, there are three arguments:
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FIELD, BEG and END. BEG and END specify region to sort."
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(interactive "p\nr")
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(let ;; To make `end-of-line' and etc. to ignore fields.
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((inhibit-field-text-motion t))
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(sort-fields-1 field beg end
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(lambda ()
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(sort-skip-fields field)
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(let* ((case-fold-search t)
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(base
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(if (looking-at "\\(0x\\)[0-9a-f]\\|\\(0\\)[0-7]")
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(cond ((match-beginning 1)
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(goto-char (match-end 1))
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16)
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((match-beginning 2)
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(goto-char (match-end 2))
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8)
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(t nil)))))
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(string-to-number (buffer-substring (point)
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(save-excursion
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(forward-sexp 1)
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(point)))
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(or base sort-numeric-base))))
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nil)))
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;;;;;###autoload
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;;(defun sort-float-fields (field beg end)
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;; "Sort lines in region numerically by the ARGth field of each line.
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;;Fields are separated by whitespace and numbered from 1 up. Specified field
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;;must contain a floating point number in each line of the region. With a
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;;negative arg, sorts by the ARGth field counted from the right. Called from a
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;;program, there are three arguments: FIELD, BEG and END. BEG and END specify
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;;region to sort."
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;; (interactive "p\nr")
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;; (sort-fields-1 field beg end
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;; (lambda ()
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;; (sort-skip-fields field)
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;; (string-to-number
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;; (buffer-substring
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;; (point)
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;; (save-excursion
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;; (re-search-forward
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;; "[+-]?[0-9]*\\.?[0-9]*\\([eE][+-]?[0-9]+\\)?")
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;; (point)))))
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;; nil))
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;;;###autoload
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(defun sort-fields (field beg end)
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"Sort lines in region lexicographically by the ARGth field of each line.
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Fields are separated by whitespace and numbered from 1 up.
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With a negative arg, sorts by the ARGth field counted from the right.
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Called from a program, there are three arguments:
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FIELD, BEG and END. BEG and END specify region to sort.
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The variable `sort-fold-case' determines whether alphabetic case affects
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the sort order."
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(interactive "p\nr")
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(let ;; To make `end-of-line' and etc. to ignore fields.
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((inhibit-field-text-motion t))
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(sort-fields-1 field beg end
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(lambda ()
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(sort-skip-fields field)
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nil)
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(lambda () (skip-chars-forward "^ \t\n")))))
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(defun sort-fields-1 (field beg end startkeyfun endkeyfun)
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(let ((tbl (syntax-table)))
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(if (zerop field) (setq field 1))
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(unwind-protect
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(save-excursion
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(save-restriction
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(narrow-to-region beg end)
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(goto-char (point-min))
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(set-syntax-table sort-fields-syntax-table)
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(sort-subr nil
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'forward-line 'end-of-line
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startkeyfun endkeyfun)))
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(set-syntax-table tbl))))
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;; Position at the beginning of field N on the current line,
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;; assuming point is initially at the beginning of the line.
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(defun sort-skip-fields (n)
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(if (> n 0)
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;; Skip across N - 1 fields.
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(let ((i (1- n)))
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(while (> i 0)
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(skip-chars-forward " \t")
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(skip-chars-forward "^ \t\n")
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(setq i (1- i)))
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(skip-chars-forward " \t")
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(if (eolp)
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(error "Line has too few fields: %s"
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(buffer-substring
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(line-beginning-position)
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(line-end-position)))))
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(end-of-line)
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;; Skip back across - N - 1 fields.
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(let ((i (1- (- n))))
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(while (> i 0)
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(skip-chars-backward " \t")
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(skip-chars-backward "^ \t\n")
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(setq i (1- i)))
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(skip-chars-backward " \t"))
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(if (bolp)
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(error "Line has too few fields: %s"
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(buffer-substring
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(line-beginning-position)
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(line-end-position))))
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;; Position at the front of the field
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;; even if moving backwards.
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(skip-chars-backward "^ \t\n")))
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(defvar sort-regexp-fields-regexp)
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(defvar sort-regexp-record-end)
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;; Move to the beginning of the next match for record-regexp,
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;; and set sort-regexp-record-end to the end of that match.
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;; If the next match is empty and does not advance point,
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;; skip one character and try again.
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(defun sort-regexp-fields-next-record ()
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(let ((oldpos (point)))
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(and (re-search-forward sort-regexp-fields-regexp nil 'move)
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(setq sort-regexp-record-end (match-end 0))
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(if (= sort-regexp-record-end oldpos)
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(progn
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(forward-char 1)
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(re-search-forward sort-regexp-fields-regexp nil 'move)
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(setq sort-regexp-record-end (match-end 0)))
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t)
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(goto-char (match-beginning 0)))))
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;;;###autoload
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(defun sort-regexp-fields (reverse record-regexp key-regexp beg end)
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"Sort the text in the region lexicographically.
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If called interactively, prompt for two regular expressions,
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RECORD-REGEXP and KEY-REGEXP.
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RECORD-REGEXP specifies the textual units to be sorted.
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For example, to sort lines, RECORD-REGEXP would be \"^.*$\".
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KEY-REGEXP specifies the part of each record (i.e. each match for
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RECORD-REGEXP) to be used for sorting.
|
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If it is \"\\\\digit\", use the digit'th \"\\\\(...\\\\)\"
|
||
match field specified by RECORD-REGEXP.
|
||
If it is \"\\\\&\", use the whole record.
|
||
Otherwise, KEY-REGEXP should be a regular expression with which
|
||
to search within the record. If a match for KEY-REGEXP is not
|
||
found within a record, that record is ignored.
|
||
|
||
With a negative prefix arg, sort in reverse order.
|
||
|
||
The variable `sort-fold-case' determines whether alphabetic case affects
|
||
the sort order.
|
||
|
||
For example: to sort lines in the region by the first word on each line
|
||
starting with the letter \"f\",
|
||
RECORD-REGEXP would be \"^.*$\" and KEY would be \"\\\\=\\<f\\\\w*\\\\>\""
|
||
;; using negative prefix arg to mean "reverse" is now inconsistent with
|
||
;; other sort-.*fields functions but then again this was before, since it
|
||
;; didn't use the magnitude of the arg to specify anything.
|
||
(interactive "P\nsRegexp specifying records to sort: \n\
|
||
sRegexp specifying key within record: \nr")
|
||
(cond ((or (equal key-regexp "") (equal key-regexp "\\&"))
|
||
(setq key-regexp 0))
|
||
((string-match "\\`\\\\[1-9]\\'" key-regexp)
|
||
(setq key-regexp (- (aref key-regexp 1) ?0))))
|
||
(save-excursion
|
||
(save-restriction
|
||
(narrow-to-region beg end)
|
||
(goto-char (point-min))
|
||
(let (sort-regexp-record-end
|
||
(sort-regexp-fields-regexp record-regexp))
|
||
(re-search-forward sort-regexp-fields-regexp nil t)
|
||
(setq sort-regexp-record-end (point))
|
||
(goto-char (match-beginning 0))
|
||
(sort-subr reverse
|
||
'sort-regexp-fields-next-record
|
||
(lambda ()
|
||
(goto-char sort-regexp-record-end))
|
||
(lambda ()
|
||
(let ((n 0))
|
||
(cond ((numberp key-regexp)
|
||
(setq n key-regexp))
|
||
((re-search-forward
|
||
key-regexp sort-regexp-record-end t)
|
||
(setq n 0))
|
||
(t (throw 'key nil)))
|
||
(condition-case ()
|
||
(cons (match-beginning n)
|
||
(match-end n))
|
||
;; if there was no such register
|
||
(error (throw 'key nil))))))))))
|
||
|
||
|
||
(defvar sort-columns-subprocess t)
|
||
|
||
;;;###autoload
|
||
(defun sort-columns (reverse &optional beg end)
|
||
"Sort lines in region alphabetically by a certain range of columns.
|
||
For the purpose of this command, the region BEG...END includes
|
||
the entire line that point is in and the entire line the mark is in.
|
||
The column positions of point and mark bound the range of columns to sort on.
|
||
A prefix argument means sort into REVERSE order.
|
||
The variable `sort-fold-case' determines whether alphabetic case affects
|
||
the sort order.
|
||
|
||
Note that `sort-columns' rejects text that contains tabs,
|
||
because tabs could be split across the specified columns
|
||
and it doesn't know how to handle that. Also, when possible,
|
||
it uses the `sort' utility program, which doesn't understand tabs.
|
||
Use \\[untabify] to convert tabs to spaces before sorting."
|
||
(interactive "P\nr")
|
||
(save-excursion
|
||
(let ;; To make `end-of-line' and etc. to ignore fields.
|
||
((inhibit-field-text-motion t)
|
||
beg1 end1 col-beg1 col-end1 col-start col-end)
|
||
(goto-char (min beg end))
|
||
(setq col-beg1 (current-column))
|
||
(beginning-of-line)
|
||
(setq beg1 (point))
|
||
(goto-char (max beg end))
|
||
(setq col-end1 (current-column))
|
||
(forward-line)
|
||
(setq end1 (point))
|
||
(setq col-start (min col-beg1 col-end1))
|
||
(setq col-end (max col-beg1 col-end1))
|
||
(if (search-backward "\t" beg1 t)
|
||
(error "sort-columns does not work with tabs -- use M-x untabify"))
|
||
(if (not (or (memq system-type '(windows-nt))
|
||
(let ((pos beg1) plist fontified)
|
||
(catch 'found
|
||
(while (< pos end1)
|
||
(setq plist (text-properties-at pos))
|
||
(setq fontified (plist-get plist 'fontified))
|
||
(while (consp plist)
|
||
(unless (or (eq (car plist) 'fontified)
|
||
(and (eq (car plist) 'face)
|
||
fontified))
|
||
(throw 'found t))
|
||
(setq plist (cddr plist)))
|
||
(setq pos (next-property-change pos nil end1)))))))
|
||
;; Use the sort utility if we can; it is 4 times as fast.
|
||
;; Do not use it if there are any non-font-lock properties
|
||
;; in the region, since the sort utility would lose the
|
||
;; properties. Tabs are used as field separator; on NetBSD,
|
||
;; sort complains if "\n" is used as field separator.
|
||
(let ((sort-args (list (if reverse "-rt\t" "-t\t")
|
||
(format "-k1.%d,1.%d"
|
||
(1+ col-start)
|
||
(1+ col-end)))))
|
||
(when sort-fold-case
|
||
(push "-f" sort-args))
|
||
(apply #'call-process-region beg1 end1 "sort" t t nil sort-args))
|
||
;; On ms-windows, use Emacs's own facilities.
|
||
(save-excursion
|
||
(save-restriction
|
||
(narrow-to-region beg1 end1)
|
||
(goto-char beg1)
|
||
(sort-subr reverse 'forward-line 'end-of-line
|
||
#'(lambda () (move-to-column col-start) nil)
|
||
#'(lambda () (move-to-column col-end) nil))))))))
|
||
|
||
;;;###autoload
|
||
(defun reverse-region (beg end)
|
||
"Reverse the order of lines in a region.
|
||
When called from Lisp, takes two point or marker arguments, BEG and END.
|
||
If BEG is not at the beginning of a line, the first line of those
|
||
to be reversed is the line starting after BEG.
|
||
If END is not at the end of a line, the last line to be reversed
|
||
is the one that ends before END."
|
||
(interactive "r")
|
||
(if (> beg end)
|
||
(let (mid) (setq mid end end beg beg mid)))
|
||
(save-excursion
|
||
;; Put beg at the start of a line and end and the end of one --
|
||
;; the largest possible region which fits this criteria.
|
||
(goto-char beg)
|
||
(or (bolp) (forward-line 1))
|
||
(setq beg (point))
|
||
(goto-char end)
|
||
;; The test for bolp is for those times when end is on an empty line;
|
||
;; it is probably not the case that the line should be included in the
|
||
;; reversal; it isn't difficult to add it afterward.
|
||
(or (and (eolp) (not (bolp))) (progn (forward-line -1) (end-of-line)))
|
||
(setq end (point-marker))
|
||
(when (<= end beg)
|
||
(user-error "There are no full lines in the region"))
|
||
;; The real work. This thing cranks through memory on large regions.
|
||
(let (ll (do t))
|
||
(while do
|
||
(goto-char beg)
|
||
(setq ll (cons (buffer-substring (point) (progn (end-of-line) (point)))
|
||
ll))
|
||
(setq do (/= (point) end))
|
||
(delete-region beg (if do (1+ (point)) (point))))
|
||
(while (cdr ll)
|
||
(insert (car ll) "\n")
|
||
(setq ll (cdr ll)))
|
||
(insert (car ll)))))
|
||
|
||
;;;###autoload
|
||
(defun delete-duplicate-lines (beg end &optional reverse adjacent keep-blanks
|
||
interactive)
|
||
"Delete all but one copy of any identical lines in the region.
|
||
Non-interactively, arguments BEG and END delimit the region.
|
||
Normally it searches forwards, keeping the first instance of
|
||
each identical line. If REVERSE is non-nil (interactively, with
|
||
a C-u prefix), it searches backwards and keeps the last instance of
|
||
each repeated line.
|
||
|
||
Identical lines need not be adjacent, unless the argument
|
||
ADJACENT is non-nil (interactively, with a C-u C-u prefix).
|
||
This is a more efficient mode of operation, and may be useful
|
||
on large regions that have already been sorted.
|
||
|
||
If the argument KEEP-BLANKS is non-nil (interactively, with a
|
||
C-u C-u C-u prefix), it retains repeated blank lines.
|
||
|
||
Returns the number of deleted lines. Interactively, or if INTERACTIVE
|
||
is non-nil, it also prints a message describing the number of deletions."
|
||
(interactive
|
||
(progn
|
||
(barf-if-buffer-read-only)
|
||
(list (region-beginning) (region-end)
|
||
(equal current-prefix-arg '(4))
|
||
(equal current-prefix-arg '(16))
|
||
(equal current-prefix-arg '(64))
|
||
t)))
|
||
(let ((lines (unless adjacent (make-hash-table :test 'equal)))
|
||
line prev-line first-line
|
||
(count 0)
|
||
(beg (copy-marker beg))
|
||
(end (copy-marker end)))
|
||
(save-excursion
|
||
(goto-char (if reverse end beg))
|
||
(if (and reverse (bolp)) (forward-char -1))
|
||
(while (if reverse
|
||
(not first-line)
|
||
(and (< (point) end) (not (eobp))))
|
||
(setq first-line (and reverse (or (<= (point) beg) (bobp))))
|
||
(setq line (buffer-substring-no-properties
|
||
(line-beginning-position) (line-end-position)))
|
||
(if (and keep-blanks (string= "" line))
|
||
(forward-line 1)
|
||
(if (if adjacent (equal line prev-line) (gethash line lines))
|
||
(progn
|
||
(delete-region (progn (forward-line 0) (point))
|
||
(progn (forward-line 1) (point)))
|
||
(if reverse (forward-line -1))
|
||
(setq count (1+ count)))
|
||
(if adjacent (setq prev-line line) (puthash line t lines))
|
||
(forward-line (if reverse -1 1))))))
|
||
(set-marker beg nil)
|
||
(set-marker end nil)
|
||
(when interactive
|
||
(message "Deleted %d %sduplicate line%s%s"
|
||
count
|
||
(if adjacent "adjacent " "")
|
||
(if (= count 1) "" "s")
|
||
(if reverse " backward" "")))
|
||
count))
|
||
|
||
(provide 'sort)
|
||
|
||
;;; sort.el ends here
|