Mercurial > hg > xemacs-beta
annotate lisp/extents.el @ 5264:0d43872986b6
Change (apply 'nconc (mapcar ...)) to (mapcan ...); warn about first form.
lisp/ChangeLog addition:
2010-09-16 Aidan Kehoe <kehoea@parhasard.net>
* byte-optimize.el (byte-optimize-apply): Transform (apply 'nconc
(mapcar ...)) to (mapcan ...); warn about use of the first idiom.
* update-elc.el (do-autoload-commands):
* packages.el (packages-find-package-library-path):
* frame.el (frame-list):
* extents.el (extent-descendants):
* etags.el (buffer-tag-table-files):
* dumped-lisp.el (preloaded-file-list):
* device.el (device-list):
* bytecomp-runtime.el (proclaim-inline, proclaim-notinline)
Use #'mapcan, not (apply #'nconc (mapcar ...) in all these files.
* bytecomp-runtime.el (eval-when-compile, eval-and-compile):
In passing, mention that these macros also evaluate the body when
interpreted.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Thu, 16 Sep 2010 13:51:49 +0100 |
| parents | abe6d1db359e |
| children | 308d34e9f07d |
| rev | line source |
|---|---|
| 428 | 1 ;;; extents.el --- miscellaneous extent functions not written in C |
| 2 | |
| 3 ;; Copyright (C) 1993-4, 1997 Free Software Foundation, Inc. | |
| 442 | 4 ;; Copyright (C) 2000 Ben Wing. |
| 428 | 5 |
| 6 ;; Keywords: internal, dumped | |
| 7 | |
| 8 ;; This file is part of XEmacs. | |
| 9 | |
| 10 ;; XEmacs is free software; you can redistribute it and/or modify it | |
| 11 ;; under the terms of the GNU General Public License as published by | |
| 12 ;; the Free Software Foundation; either version 2, or (at your option) | |
| 13 ;; any later version. | |
| 14 | |
| 15 ;; XEmacs is distributed in the hope that it will be useful, but | |
| 16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 18 ;; General Public License for more details. | |
| 19 | |
| 20 ;; You should have received a copy of the GNU General Public License | |
| 21 ;; along with XEmacs; see the file COPYING. If not, write to the | |
| 22 ;; Free Software Foundation, 59 Temple Place - Suite 330, | |
| 23 ;; Boston, MA 02111-1307, USA. | |
| 24 | |
| 25 ;;; Synched up with: Not in FSF. | |
| 26 | |
| 27 ;;; Commentary: | |
| 28 | |
| 442 | 29 ;;; Authorship: |
| 30 | |
| 31 ;; Created 1995 Ben Wing. | |
| 32 ;; mapcar-extents (and extent-list?) from stig@hackvan.com, c. 1996. | |
| 428 | 33 |
| 34 ;;; Code: | |
| 35 | |
| 36 ;; an alternative to map-extents. | |
| 37 (defun mapcar-extents (function &optional predicate buffer-or-string from to | |
| 38 flags property value) | |
| 39 "Apply FUNCTION to all extents which overlap a region in BUFFER-OR-STRING. | |
| 40 The region is delimited by FROM and TO. FUNCTION is called with | |
| 41 one argument, the extent. A list of the values returned by FUNCTION | |
| 42 is returned. An optional PREDICATE may be used to further limit the | |
| 43 extents over which FUNCTION is mapped. The optional arguments FLAGS, | |
| 44 PROPERTY, and VALUE may also be used to control the extents passed to | |
| 45 PREDICATE or FUNCTION. See also `map-extents'." | |
| 46 (let (*result*) | |
| 47 (map-extents (if predicate | |
| 48 #'(lambda (ex junk) | |
| 49 (and (funcall predicate ex) | |
| 50 (setq *result* (cons (funcall function ex) | |
| 51 *result*))) | |
| 52 nil) | |
| 53 #'(lambda (ex junk) | |
| 54 (setq *result* (cons (funcall function ex) | |
| 55 *result*)) | |
| 56 nil)) | |
| 57 buffer-or-string from to nil flags property value) | |
| 58 (nreverse *result*))) | |
| 59 | |
| 442 | 60 (defun extent-list (&optional buffer-or-string from to flags property value) |
| 428 | 61 "Return a list of the extents in BUFFER-OR-STRING. |
| 62 BUFFER-OR-STRING defaults to the current buffer if omitted. | |
| 63 FROM and TO can be used to limit the range over which extents are | |
| 64 returned; if omitted, all extents in the buffer or string are returned. | |
| 65 | |
| 66 More specifically, if a range is specified using FROM and TO, only | |
| 67 extents that overlap the range (i.e. begin or end inside of the range) | |
| 68 are included in the list. FROM and TO default to the beginning and | |
| 69 end of BUFFER-OR-STRING, respectively. | |
| 70 | |
| 71 FLAGS controls how end cases are treated. For a discussion of this, | |
| 442 | 72 and exactly what ``overlap'' means, see `map-extents'. PROPERTY and VALUE |
| 73 are also as in `map-extents'. | |
| 428 | 74 |
| 75 If you want to map a function over the extents in a buffer or string, | |
| 442 | 76 consider using `map-extents' or `mapcar-extents' instead. |
| 77 | |
| 78 See also `extents-at'." | |
| 79 (mapcar-extents 'identity nil buffer-or-string from to flags property value)) | |
| 80 | |
| 81 (defun extent-at-event (event &optional property before at-flag) | |
| 82 "Return the smallest extent under EVENT, if any. | |
| 83 PROPERTY, BEFORE, and AT-FLAG are as in `extent-at'." | |
| 84 (let* ((win (event-window event)) | |
| 85 (p (event-point event))) | |
| 86 (and win p (extent-at p (window-buffer win) property before at-flag)))) | |
| 87 | |
| 88 (defun extents-at-event (event &optional property before at-flag) | |
| 89 "Return a list of all extents under EVENT. | |
| 90 PROPERTY, BEFORE, and AT-FLAG are as in `extent-at'." | |
| 91 (let* ((win (event-window event)) | |
| 92 (p (event-point event))) | |
| 93 (and win p (extents-at p (window-buffer win) property before at-flag)))) | |
| 428 | 94 |
| 95 (defun extent-string (extent) | |
| 96 "Return the string delimited by the bounds of EXTENT." | |
| 97 (let ((object (extent-object extent))) | |
| 98 (if (bufferp object) | |
| 99 (buffer-substring (extent-start-position extent) | |
| 100 (extent-end-position extent) | |
| 101 object) | |
| 102 (substring object | |
| 103 (extent-start-position extent) | |
| 104 (extent-end-position extent))))) | |
| 105 | |
| 106 (defun extent-descendants (extent) | |
| 107 "Return a list of all descendants of EXTENT, including EXTENT. | |
| 108 This recursively applies `extent-children' to any children of | |
| 109 EXTENT, until no more children can be found." | |
| 110 (let ((children (extent-children extent))) | |
| 111 (if children | |
|
5264
0d43872986b6
Change (apply 'nconc (mapcar ...)) to (mapcan ...); warn about first form.
Aidan Kehoe <kehoea@parhasard.net>
parents:
442
diff
changeset
|
112 (mapcan 'extent-descendants children) |
| 428 | 113 (list extent)))) |
| 114 | |
| 115 (defun set-extent-keymap (extent keymap) | |
| 116 "Set EXTENT's `keymap' property to KEYMAP." | |
| 117 (set-extent-property extent 'keymap keymap)) | |
| 118 | |
| 119 (defun extent-keymap (extent) | |
| 120 "Return EXTENT's `keymap' property." | |
| 121 (extent-property extent 'keymap)) | |
| 122 | |
| 123 ;;; extents.el ends here |