MANSFIEL@EMBL.BITNET (Niall Mansfield) (06/30/87)
The standard GNU Emacs "narrow-to-region" and "widen" allow for only one-or-none narrowing - i.e. you're narrowed or not. Often I would have found it helpful to have recursive narrowing. Is there any way to do this? (An example: when I'm already narrowed to a particular function in a source program, I would like to restrict further to a particular part of that function for some operation, and when I am finished I'd like "widen" to undo just the top level restriction, leaving me still narrowed to the whole function). Niall
ardis@wanginst.EDU (Mark A. Ardis) (07/06/87)
In article <8707021017.AA21039@EDDIE.MIT.EDU>, MANSFIEL@EMBL.BITNET (Niall Mansfield) writes: > > The standard GNU Emacs "narrow-to-region" and "widen" allow > for only one-or-none narrowing - i.e. you're narrowed or > not. > > Often I would have found it helpful to have recursive > narrowing. Is there any way to do this? Try this: ;;; recursive-narrow.el -- recursive narrowing ;;; Mark A. Ardis, July 6, 1987 (defun recursive-narrow (start stop) "Narrow to the region between START and STOP, invoke recursive-edit to allow further editing, then widen to the previous restriction." (interactive "r") ; Local Variables (let () ; Body (save-restriction (narrow-to-region start stop) (recursive-edit) (widen) ) ; save-restriction ) ; let ) ; defun recursive-narrow ;;; end of recursive-narrow.el -- Mark A. Ardis ardis%wanginst@CSNet-Relay (CSNet) Wang Institute of Graduate Studies ...!decvax!wanginst!ardis (UUCP) 72 Tyng Road, Tyngsboro, MA 01879-2099 (617) 649-9731
rbj@ICST-CMR.ARPA (Root Boy Jim) (07/06/87)
? ? The standard GNU Emacs "narrow-to-region" and "widen" allow ? for only one-or-none narrowing - i.e. you're narrowed or not. ? ? Often I would have found it helpful to have recursive ? narrowing. Is there any way to do this? M-x describe-function <RET> save-restriction <RET> save-restriction: Execute the body, undoing at the end any changes to current buffer's restrictions. Changes to restrictions are made by narrow-to-region or by widen. Thus, the restrictions are the same after this function as they were before it. The value returned is that returned by the last form in the body. This function can be confused if, within the body, you widen and then make changes outside the area within the saved restrictions. Note: if you are using both save-excursion and save-restriction, use save-excursion outermost. ? Niall ? (Root Boy) Jim Cottrell <rbj@icst-cmr.arpa> National Bureau of Standards Flamer's Hotline: (301) 975-5688 If I am elected no one will ever have to do their laundry again!