/usr/share/common-lisp/source/mcclim/Drei/editing.lisp is in cl-mcclim 0.9.6.dfsg.cvs20100315-2.
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;;; (c) copyright 2004-2005 by
;;; Robert Strandh (strandh@labri.fr)
;;; (c) copyright 2004-2005 by
;;; Elliott Johnson (ejohnson@fasl.info)
;;; (c) copyright 2005 by
;;; Matthieu Villeneuve (matthieu.villeneuve@free.fr)
;;; (c) copyright 2005 by
;;; Aleksandar Bakic (a_bakic@yahoo.com)
;;; (c) copyright 2006 by
;;; Troels Henriksen (athas@sigkill.dk)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
;;; Drei editing
;;; See information in motion.lisp
;;;
;;; An editing function is a function named FORWARD-<frob>-<unit> or
;;; BACKWARD-<frob>-<unit>, or just <frob>-<unit> in the case where
;;; discering between forward and backward commands does not make
;;; sense (an example is TRANSPOSE-<unit>).
;;;
;;; A proper unit is a unit for which all the functions required by
;;; the motion protocol has been implemented, this can be trivially
;;; done by using the macro DREI-MOTION:DEFINE-MOTION-COMMANDS.
;;;
;;; Given a proper unit,
;;;
;;; (DEFINE-EDIT-FNS <unit>)
;;;
;;; defines the editing functions FORWARD-DELETE-<unit>,
;;; BACKWARD-DELETE-<unit>, FORWARD-KILL-<unit>, BACKWARD-KILL-<unit>
;;; and TRANSPOSE-<unit>.
;;;
;;; This file also holds definitions for other miscellaneus
;;; editing-related functions. The definitions in this file should
;;; have to do with immediate editing, understood as insertion,
;;; deletion or movement of buffer contents. Transformation of buffer
;;; contents (such as converting the case of a region) should not be
;;; here.
(in-package :drei-editing)
(defmacro define-edit-fns (unit &key plural)
(labels ((concat (&rest strings)
(apply #'concatenate 'STRING (mapcar #'string strings)))
(symbol (&rest strings)
(intern (apply #'concat strings))))
(let* ((unit-name (string-downcase unit))
(plural (or plural (concat unit-name "s")))
(upper-plural (string-upcase plural))
(forward-delete (symbol "FORWARD-DELETE-" unit))
(backward-delete (symbol "BACKWARD-DELETE-" unit))
(forward-kill (symbol "FORWARD-KILL-" unit))
(backward-kill (symbol "BACKWARD-KILL-" unit))
(transpose (symbol "TRANSPOSE-" upper-plural))
(forward (find-symbol (concat "FORWARD-" (string-upcase unit))))
(backward (find-symbol (concat "BACKWARD-" (string-upcase unit)))))
(unless (and forward backward)
(error "The unit ~A is not known." unit))
`(progn
(defgeneric ,forward-delete
(mark syntax &optional count limit-action)
(:documentation
,(concat "Delete COUNT " plural " beginning from MARK.")))
(defmethod ,forward-delete
(mark syntax &optional (count 1)
(limit-action #'error-limit-action))
(let ((mark2 (clone-mark mark)))
(when (,forward mark2 syntax count limit-action)
(delete-region mark mark2)
t)))
(defmethod ,forward-delete :around
(mark syntax &optional (count 1)
(limit-action #'error-limit-action))
(cond ((minusp count)
(,backward-delete mark syntax (- count) limit-action))
((plusp count)
(call-next-method))
(t t)))
(defgeneric ,backward-delete
(mark syntax &optional count limit-action)
(:documentation
,(concat "Delete COUNT " plural " backwards beginning from MARK.")))
(defmethod ,backward-delete
(mark syntax &optional (count 1)
(limit-action #'error-limit-action))
(let ((mark2 (clone-mark mark)))
(when (,backward mark2 syntax count limit-action)
(delete-region mark mark2)
t)))
(defmethod ,backward-delete :around
(mark syntax &optional (count 1)
(limit-action #'error-limit-action))
(cond ((minusp count)
(,forward-delete mark syntax (- count) limit-action))
((plusp count)
(call-next-method))
(t t)))
(defgeneric ,forward-kill
(mark syntax &optional count concatenate-p limit-action)
(:documentation
,(concat "Kill COUNT " plural " beginning from MARK.")))
(defmethod ,forward-kill
(mark syntax &optional (count 1) concatenate-p
(limit-action #'error-limit-action))
(let ((start (offset mark)))
(,forward mark syntax count limit-action)
(unless (mark= mark start)
(if concatenate-p
(if (plusp count)
(kill-ring-concatenating-push *kill-ring*
(region-to-sequence start mark))
(kill-ring-reverse-concatenating-push *kill-ring*
(region-to-sequence start mark)))
(kill-ring-standard-push *kill-ring*
(region-to-sequence start mark)))
(delete-region start mark)
t)))
(defmethod ,forward-kill :around
(mark syntax &optional (count 1) concatenate-p
(limit-action #'error-limit-action))
(declare (ignore concatenate-p))
(cond ((minusp count)
(,backward-kill mark syntax (- count) limit-action))
((plusp count)
(call-next-method))
(t t)))
(defgeneric ,backward-kill
(mark syntax &optional count concatenate-p limit-action)
(:documentation
,(concat "Kill COUNT " plural " backwards beginning from MARK.")))
(defmethod ,backward-kill
(mark syntax &optional (count 1) concatenate-p
(limit-action #'error-limit-action))
(let ((start (offset mark)))
(,backward mark syntax count limit-action)
(unless (mark= mark start)
(if concatenate-p
(if (plusp count)
(kill-ring-concatenating-push *kill-ring*
(region-to-sequence start mark))
(kill-ring-reverse-concatenating-push *kill-ring*
(region-to-sequence start mark)))
(kill-ring-standard-push *kill-ring*
(region-to-sequence start mark)))
(delete-region start mark)
t)))
(defmethod ,backward-kill :around
(mark syntax &optional (count 1) concatenate-p
(limit-action #'error-limit-action))
(declare (ignore concatenate-p))
(cond ((minusp count)
(,forward-kill mark syntax (- count) limit-action))
((plusp count)
(call-next-method))
(t t)))
(defgeneric ,transpose
(mark syntax)
(:documentation
,(concat "Transpose two " plural " at MARK.")))
(defmethod ,transpose
((mark right-sticky-mark) syntax)
(let ((start1 (clone-mark mark)))
(,backward start1 syntax 1 nil)
(let ((end1 (clone-mark start1)))
(,forward end1 syntax 1 #'error-limit-action)
(let ((start2 (clone-mark end1)))
(,forward start2 syntax 1 #'error-limit-action)
(let ((end2 (clone-mark start2)))
(,backward start2 syntax 1 nil)
(as-region (start1 end1)
(as-region (start2 end2)
(when (mark> start1 start2)
(psetf start1 start2
end1 end2
start2 start1
end2 end1))
(if (mark> end1 start2)
(error-limit-action mark (offset mark) 0 ,unit-name syntax)
(let ((obj2 (extract-region start2 end2)))
(insert-sequence start2 (extract-region start1 end1))
(insert-sequence start1 obj2)
(setf (offset mark) (offset end2)))))))))))
(defmethod ,transpose
((mark left-sticky-mark) syntax)
(let ((start1 (clone-mark mark)))
(,backward start1 syntax 1 nil)
(let ((end1 (clone-mark start1)))
(,forward end1 syntax 1 #'error-limit-action)
(let ((start2 (clone-mark end1)))
(,forward start2 syntax 1 #'error-limit-action)
(let ((end2 (clone-mark start2)))
(,backward start2 syntax 1 nil)
(as-region (start1 end1)
(as-region (start2 end2)
(when (mark> start1 start2)
(psetf start1 start2
end1 end2
start2 start1
end2 end1))
(if (mark> end1 start2)
(error-limit-action mark (offset mark) 0 ,unit-name syntax)
(let ((obj2 (extract-region start2 end2)))
(insert-sequence start2 (extract-region start1 end1))
(insert-sequence start1 obj2)
(setf (offset mark) (offset end2)))))))))))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Object editing
(defun forward-delete-object (mark &optional (count 1) limit-action)
"Kill `count' objects beginning from `mark'."
(let ((offset (offset mark)))
(handler-case (progn (forward-object mark count)
(delete-region offset mark))
(invalid-motion ()
(when limit-action
(funcall limit-action mark (offset mark)
count "object" nil))))))
(defun backward-delete-object (mark &optional (count 1) limit-action)
"Kill `count' objects backwards beginning from `mark'."
(let ((offset (offset mark)))
(handler-case (progn (backward-object mark count)
(delete-region offset mark))
(invalid-motion ()
(when limit-action
(funcall limit-action mark (offset mark)
(- count) "object" nil))))))
(defun forward-kill-object (mark &optional (count 1) concatenate-p limit-action)
"Kill `count' objects beginning from `mark'."
(let ((start (offset mark)))
(handler-case (progn (forward-object mark count)
(if concatenate-p
(if (plusp count)
(kill-ring-concatenating-push
*kill-ring* (region-to-sequence start mark))
(kill-ring-reverse-concatenating-push
*kill-ring* (region-to-sequence start mark)))
(kill-ring-standard-push
*kill-ring* (region-to-sequence start mark)))
(delete-region start mark))
(invalid-motion ()
(when limit-action
(funcall limit-action mark (offset mark)
(- count) "object" nil))))))
(defun backward-kill-object (mark &optional (count 1) concatenate-p limit-action)
"Kill `count' objects backwards beginning from `mark'."
(let ((start (offset mark)))
(handler-case (progn (backward-object mark count)
(if concatenate-p
(if (plusp count)
(kill-ring-concatenating-push
*kill-ring* (region-to-sequence start mark))
(kill-ring-reverse-concatenating-push
*kill-ring* (region-to-sequence start mark)))
(kill-ring-standard-push
*kill-ring* (region-to-sequence start mark)))
(delete-region start mark))
(invalid-motion ()
(when limit-action
(funcall limit-action mark (offset mark)
(- count) "object" nil))))))
(defun transpose-objects (mark)
"Transpose two objects at `mark'."
(unless (beginning-of-buffer-p mark)
(when (end-of-line-p mark)
(backward-object mark))
(unless (beginning-of-buffer-p mark)
(let ((object (object-after mark)))
(delete-range mark)
(backward-object mark)
(insert-object mark object)
(forward-object mark)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Line editing
(define-edit-fns line)
(define-edit-fns line-start)
;; Autogenerated TRANSPOSE-LINES is not good enough.
(defmethod transpose-lines
((mark left-sticky-mark) syntax)
(beginning-of-line mark)
(unless (beginning-of-buffer-p mark)
(backward-line mark syntax))
(let* ((bol (offset mark))
(eol (progn (end-of-line mark)
(offset mark)))
(line (buffer-sequence (buffer mark) bol eol)))
(delete-region bol mark)
;; Remove newline at end of line as well.
(unless (end-of-buffer-p mark)
(delete-range mark))
(end-of-line mark)
(forward-line mark syntax 0)
(insert-sequence mark line)
(insert-object mark #\Newline)))
(defmethod transpose-lines
((mark right-sticky-mark) syntax)
(beginning-of-line mark)
(unless (beginning-of-buffer-p mark)
(backward-line mark syntax))
(let* ((bol (offset mark))
(eol (progn (end-of-line mark)
(offset mark)))
(line (buffer-sequence (buffer mark) bol eol)))
(delete-region bol mark)
;; Remove newline at end of line as well.
(unless (end-of-buffer-p mark)
(delete-range mark))
(end-of-line mark)
(insert-object mark #\Newline)
(forward-line mark syntax 0)
(insert-sequence mark line)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Word editing
(define-edit-fns word)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Page editing
(define-edit-fns page)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Paragraph editing
(define-edit-fns paragraph)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Sentence editing
(define-edit-fns sentence)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Expression editing
(define-edit-fns expression)
(define-edit-fns definition)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; List editing
(define-edit-fns list)
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