Mercurial > hg > xemacs-beta
view lisp/indent.el @ 665:fdefd0186b75
[xemacs-hg @ 2001-09-20 06:28:42 by ben]
The great integral types renaming.
The purpose of this is to rationalize the names used for various
integral types, so that they match their intended uses and follow
consist conventions, and eliminate types that were not semantically
different from each other.
The conventions are:
-- All integral types that measure quantities of anything are
signed. Some people disagree vociferously with this, but their
arguments are mostly theoretical, and are vastly outweighed by
the practical headaches of mixing signed and unsigned values,
and more importantly by the far increased likelihood of
inadvertent bugs: Because of the broken "viral" nature of
unsigned quantities in C (operations involving mixed
signed/unsigned are done unsigned, when exactly the opposite is
nearly always wanted), even a single error in declaring a
quantity unsigned that should be signed, or even the even more
subtle error of comparing signed and unsigned values and
forgetting the necessary cast, can be catastrophic, as
comparisons will yield wrong results. -Wsign-compare is turned
on specifically to catch this, but this tends to result in a
great number of warnings when mixing signed and unsigned, and
the casts are annoying. More has been written on this
elsewhere.
-- All such quantity types just mentioned boil down to EMACS_INT,
which is 32 bits on 32-bit machines and 64 bits on 64-bit
machines. This is guaranteed to be the same size as Lisp
objects of type `int', and (as far as I can tell) of size_t
(unsigned!) and ssize_t. The only type below that is not an
EMACS_INT is Hashcode, which is an unsigned value of the same
size as EMACS_INT.
-- Type names should be relatively short (no more than 10
characters or so), with the first letter capitalized and no
underscores if they can at all be avoided.
-- "count" == a zero-based measurement of some quantity. Includes
sizes, offsets, and indexes.
-- "bpos" == a one-based measurement of a position in a buffer.
"Charbpos" and "Bytebpos" count text in the buffer, rather than
bytes in memory; thus Bytebpos does not directly correspond to
the memory representation. Use "Membpos" for this.
-- "Char" refers to internal-format characters, not to the C type
"char", which is really a byte.
-- For the actual name changes, see the script below.
I ran the following script to do the conversion. (NOTE: This script
is idempotent. You can safely run it multiple times and it will
not screw up previous results -- in fact, it will do nothing if
nothing has changed. Thus, it can be run repeatedly as necessary
to handle patches coming in from old workspaces, or old branches.)
There are two tags, just before and just after the change:
`pre-integral-type-rename' and `post-integral-type-rename'. When
merging code from the main trunk into a branch, the best thing to
do is first merge up to `pre-integral-type-rename', then apply the
script and associated changes, then merge from
`post-integral-type-change' to the present. (Alternatively, just do
the merging in one operation; but you may then have a lot of
conflicts needing to be resolved by hand.)
Script `fixtypes.sh' follows:
----------------------------------- cut ------------------------------------
files="*.[ch] s/*.h m/*.h config.h.in ../configure.in Makefile.in.in ../lib-src/*.[ch] ../lwlib/*.[ch]"
gr Memory_Count Bytecount $files
gr Lstream_Data_Count Bytecount $files
gr Element_Count Elemcount $files
gr Hash_Code Hashcode $files
gr extcount bytecount $files
gr bufpos charbpos $files
gr bytind bytebpos $files
gr memind membpos $files
gr bufbyte intbyte $files
gr Extcount Bytecount $files
gr Bufpos Charbpos $files
gr Bytind Bytebpos $files
gr Memind Membpos $files
gr Bufbyte Intbyte $files
gr EXTCOUNT BYTECOUNT $files
gr BUFPOS CHARBPOS $files
gr BYTIND BYTEBPOS $files
gr MEMIND MEMBPOS $files
gr BUFBYTE INTBYTE $files
gr MEMORY_COUNT BYTECOUNT $files
gr LSTREAM_DATA_COUNT BYTECOUNT $files
gr ELEMENT_COUNT ELEMCOUNT $files
gr HASH_CODE HASHCODE $files
----------------------------------- cut ------------------------------------
`fixtypes.sh' is a Bourne-shell script; it uses 'gr':
----------------------------------- cut ------------------------------------
#!/bin/sh
# Usage is like this:
# gr FROM TO FILES ...
# globally replace FROM with TO in FILES. FROM and TO are regular expressions.
# backup files are stored in the `backup' directory.
from="$1"
to="$2"
shift 2
echo ${1+"$@"} | xargs global-replace "s/$from/$to/g"
----------------------------------- cut ------------------------------------
`gr' in turn uses a Perl script to do its real work,
`global-replace', which follows:
----------------------------------- cut ------------------------------------
: #-*- Perl -*-
### global-modify --- modify the contents of a file by a Perl expression
## Copyright (C) 1999 Martin Buchholz.
## Copyright (C) 2001 Ben Wing.
## Authors: Martin Buchholz <martin@xemacs.org>, Ben Wing <ben@xemacs.org>
## Maintainer: Ben Wing <ben@xemacs.org>
## Current Version: 1.0, May 5, 2001
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program 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
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with XEmacs; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
eval 'exec perl -w -S $0 ${1+"$@"}'
if 0;
use strict;
use FileHandle;
use Carp;
use Getopt::Long;
use File::Basename;
(my $myName = $0) =~ s@.*/@@; my $usage="
Usage: $myName [--help] [--backup-dir=DIR] [--line-mode] [--hunk-mode]
PERLEXPR FILE ...
Globally modify a file, either line by line or in one big hunk.
Typical usage is like this:
[with GNU print, GNU xargs: guaranteed to handle spaces, quotes, etc.
in file names]
find . -name '*.[ch]' -print0 | xargs -0 $0 's/\bCONST\b/const/g'\n
[with non-GNU print, xargs]
find . -name '*.[ch]' -print | xargs $0 's/\bCONST\b/const/g'\n
The file is read in, either line by line (with --line-mode specified)
or in one big hunk (with --hunk-mode specified; it's the default), and
the Perl expression is then evalled with \$_ set to the line or hunk of
text, including the terminating newline if there is one. It should
destructively modify the value there, storing the changed result in \$_.
Files in which any modifications are made are backed up to the directory
specified using --backup-dir, or to `backup' by default. To disable this,
use --backup-dir= with no argument.
Hunk mode is the default because it is MUCH MUCH faster than line-by-line.
Use line-by-line only when it matters, e.g. you want to do a replacement
only once per line (the default without the `g' argument). Conversely,
when using hunk mode, *ALWAYS* use `g'; otherwise, you will only make one
replacement in the entire file!
";
my %options = ();
$Getopt::Long::ignorecase = 0;
&GetOptions (
\%options,
'help', 'backup-dir=s', 'line-mode', 'hunk-mode',
);
die $usage if $options{"help"} or @ARGV <= 1;
my $code = shift;
die $usage if grep (-d || ! -w, @ARGV);
sub SafeOpen {
open ((my $fh = new FileHandle), $_[0]);
confess "Can't open $_[0]: $!" if ! defined $fh;
return $fh;
}
sub SafeClose {
close $_[0] or confess "Can't close $_[0]: $!";
}
sub FileContents {
my $fh = SafeOpen ("< $_[0]");
my $olddollarslash = $/;
local $/ = undef;
my $contents = <$fh>;
$/ = $olddollarslash;
return $contents;
}
sub WriteStringToFile {
my $fh = SafeOpen ("> $_[0]");
binmode $fh;
print $fh $_[1] or confess "$_[0]: $!\n";
SafeClose $fh;
}
foreach my $file (@ARGV) {
my $changed_p = 0;
my $new_contents = "";
if ($options{"line-mode"}) {
my $fh = SafeOpen $file;
while (<$fh>) {
my $save_line = $_;
eval $code;
$changed_p = 1 if $save_line ne $_;
$new_contents .= $_;
}
} else {
my $orig_contents = $_ = FileContents $file;
eval $code;
if ($_ ne $orig_contents) {
$changed_p = 1;
$new_contents = $_;
}
}
if ($changed_p) {
my $backdir = $options{"backup-dir"};
$backdir = "backup" if !defined ($backdir);
if ($backdir) {
my ($name, $path, $suffix) = fileparse ($file, "");
my $backfulldir = $path . $backdir;
my $backfile = "$backfulldir/$name";
mkdir $backfulldir, 0755 unless -d $backfulldir;
print "modifying $file (original saved in $backfile)\n";
rename $file, $backfile;
}
WriteStringToFile ($file, $new_contents);
}
}
----------------------------------- cut ------------------------------------
In addition to those programs, I needed to fix up a few other
things, particularly relating to the duplicate definitions of
types, now that some types merged with others. Specifically:
1. in lisp.h, removed duplicate declarations of Bytecount. The
changed code should now look like this: (In each code snippet
below, the first and last lines are the same as the original, as
are all lines outside of those lines. That allows you to locate
the section to be replaced, and replace the stuff in that
section, verifying that there isn't anything new added that
would need to be kept.)
--------------------------------- snip -------------------------------------
/* Counts of bytes or chars */
typedef EMACS_INT Bytecount;
typedef EMACS_INT Charcount;
/* Counts of elements */
typedef EMACS_INT Elemcount;
/* Hash codes */
typedef unsigned long Hashcode;
/* ------------------------ dynamic arrays ------------------- */
--------------------------------- snip -------------------------------------
2. in lstream.h, removed duplicate declaration of Bytecount.
Rewrote the comment about this type. The changed code should
now look like this:
--------------------------------- snip -------------------------------------
#endif
/* The have been some arguments over the what the type should be that
specifies a count of bytes in a data block to be written out or read in,
using Lstream_read(), Lstream_write(), and related functions.
Originally it was long, which worked fine; Martin "corrected" these to
size_t and ssize_t on the grounds that this is theoretically cleaner and
is in keeping with the C standards. Unfortunately, this practice is
horribly error-prone due to design flaws in the way that mixed
signed/unsigned arithmetic happens. In fact, by doing this change,
Martin introduced a subtle but fatal error that caused the operation of
sending large mail messages to the SMTP server under Windows to fail.
By putting all values back to be signed, avoiding any signed/unsigned
mixing, the bug immediately went away. The type then in use was
Lstream_Data_Count, so that it be reverted cleanly if a vote came to
that. Now it is Bytecount.
Some earlier comments about why the type must be signed: This MUST BE
SIGNED, since it also is used in functions that return the number of
bytes actually read to or written from in an operation, and these
functions can return -1 to signal error.
Note that the standard Unix read() and write() functions define the
count going in as a size_t, which is UNSIGNED, and the count going
out as an ssize_t, which is SIGNED. This is a horrible design
flaw. Not only is it highly likely to lead to logic errors when a
-1 gets interpreted as a large positive number, but operations are
bound to fail in all sorts of horrible ways when a number in the
upper-half of the size_t range is passed in -- this number is
unrepresentable as an ssize_t, so code that checks to see how many
bytes are actually written (which is mandatory if you are dealing
with certain types of devices) will get completely screwed up.
--ben
*/
typedef enum lstream_buffering
--------------------------------- snip -------------------------------------
3. in dumper.c, there are four places, all inside of switch()
statements, where XD_BYTECOUNT appears twice as a case tag. In
each case, the two case blocks contain identical code, and you
should *REMOVE THE SECOND* and leave the first.
author | ben |
---|---|
date | Thu, 20 Sep 2001 06:31:11 +0000 |
parents | 1ccc32a20af4 |
children | a634e3b7acc8 |
line wrap: on
line source
;;; indent.el --- indentation commands for XEmacs ;; Copyright (C) 1985, 1992, 1993, 1995, 1997 Free Software Foundation, Inc. ;; Maintainer: FSF ;; Keywords: lisp, languages, tools, dumped ;; This file is part of XEmacs. ;; XEmacs is free software; you can redistribute it and/or modify it ;; under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 2, or (at your option) ;; any later version. ;; XEmacs 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 ;; General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with XEmacs; see the file COPYING. If not, write to the Free ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA ;; 02111-1307, USA. ;;; Synched up with: FSF 19.30. ;;; Commentary: ;; This file is dumped with XEmacs. ;; Commands for making and changing indentation in text. These are ;; described in the XEmacs Reference Manual. ;; 06/11/1997 - Convert (preceding|following)-char to char-(before|after) -slb ;;; Code: (defvar standard-indent 4 "\ Default number of columns for margin-changing functions to indent.") (defvar indent-line-function 'indent-to-left-margin "Function to indent current line.") (defun indent-according-to-mode () "Indent line in proper way for current major mode." (interactive) (funcall indent-line-function)) (defun indent-for-tab-command (&optional prefix-arg) "Indent line in proper way for current major mode." (interactive "P") (if (eq indent-line-function 'indent-to-left-margin) (insert-tab prefix-arg) (if prefix-arg (funcall indent-line-function prefix-arg) (funcall indent-line-function)))) (defun insert-tab (&optional prefix-arg) (let ((count (prefix-numeric-value prefix-arg))) (if abbrev-mode (expand-abbrev)) (if indent-tabs-mode (insert-char ?\t count) ;; XEmacs: (Need the `1+') (indent-to (* tab-width (1+ (/ (current-column) tab-width))))))) (defun indent-rigidly (start end count) "Indent all lines starting in the region sideways by COUNT columns. Called from a program, takes three arguments, START, END and COUNT." (interactive "r\np") (save-excursion (goto-char end) (setq end (point-marker)) (goto-char start) (or (bolp) (forward-line 1)) (while (< (point) end) (let ((indent (current-indentation)) eol-flag) (save-excursion (skip-chars-forward " \t") (setq eol-flag (eolp))) (or eol-flag (indent-to (max 0 (+ indent count)) 0)) (delete-region (point) (progn (skip-chars-forward " \t") (point)))) (forward-line 1)) (move-marker end nil) (setq zmacs-region-stays nil))) ; XEmacs (defun indent-line-to (column) "Indent current line to COLUMN. This function removes or adds spaces and tabs at beginning of line only if necessary. It leaves point at end of indentation." (back-to-indentation) (let ((cur-col (current-column))) (cond ((< cur-col column) (if (>= (- column (* (/ cur-col tab-width) tab-width)) tab-width) (delete-region (point) (progn (skip-chars-backward " ") (point)))) (indent-to column)) ((> cur-col column) ; too far right (after tab?) (delete-region (progn (move-to-column column t) (point)) (progn (back-to-indentation) (point))))))) (defun current-left-margin () "Return the left margin to use for this line. This is the value of the buffer-local variable `left-margin' plus the value of the `left-margin' text-property at the start of the line." (save-excursion (back-to-indentation) (max 0 (+ left-margin (or (get-text-property (if (and (eobp) (not (bobp))) (1- (point)) (point)) 'left-margin) 0))))) (defun move-to-left-margin (&optional n force) "Move to the left margin of the current line. With optional argument, move forward N-1 lines first. The column moved to is the one given by the `current-left-margin' function. If the line's indentation appears to be wrong, and this command is called interactively or with optional argument FORCE, it will be fixed." (interactive (list (prefix-numeric-value current-prefix-arg) t)) (beginning-of-line n) (skip-chars-forward " \t") (let ((lm (current-left-margin)) (cc (current-column))) (cond ((> cc lm) (if (> (move-to-column lm force) lm) ;; If lm is in a tab and we are not forcing, move before tab (backward-char 1))) ((and force (< cc lm)) (indent-to-left-margin))))) ;; This is the default indent-line-function, ;; used in Fundamental Mode, Text Mode, etc. (defun indent-to-left-margin () "Indent current line to the column given by `current-left-margin'." (indent-line-to (current-left-margin))) (defun delete-to-left-margin (&optional from to) "Remove left margin indentation from a region. The amount of indentation to delete is determined by calling the function `current-left-margin'. In no case will it delete non-whitespace. Args FROM and TO are optional; default is the whole buffer." (save-excursion (goto-char (or to (point-max))) (setq to (point-marker)) (goto-char (or from (point-min))) (or (bolp) (forward-line 1)) (while (< (point) to) (delete-region (point) (progn (move-to-left-margin nil t) (point))) (forward-line 1)) (move-marker to nil))) (defun set-left-margin (from to lm) "Set the left margin of the region to WIDTH. If `auto-fill-mode' is active, re-fill the region to fit the new margin." (interactive "r\nNSet left margin to column: ") (if (interactive-p) (setq lm (prefix-numeric-value lm))) (save-excursion ;; If inside indentation, start from BOL. (goto-char from) (skip-chars-backward " \t") (if (bolp) (setq from (point))) ;; Place end after whitespace (goto-char to) (skip-chars-forward " \t") (setq to (point-marker))) ;; Delete margin indentation first, but keep paragraph indentation. (delete-to-left-margin from to) (put-text-property from to 'left-margin lm) (indent-rigidly from to lm) (if auto-fill-function (save-excursion (fill-region from to nil t t))) (move-marker to nil)) (defun set-right-margin (from to lm) "Set the right margin of the region to WIDTH. If `auto-fill-mode' is active, re-fill the region to fit the new margin." (interactive "r\nNSet right margin to width: ") (if (interactive-p) (setq lm (prefix-numeric-value lm))) (save-excursion (goto-char from) (skip-chars-backward " \t") (if (bolp) (setq from (point)))) (put-text-property from to 'right-margin lm) (if auto-fill-function (save-excursion (fill-region from to nil t t)))) (defun alter-text-property (from to prop func &optional object) "Programmatically change value of a text-property. For each region between FROM and TO that has a single value for PROPERTY, apply FUNCTION to that value and sets the property to the function's result. Optional fifth argument OBJECT specifies the string or buffer to operate on." (let ((begin from) end val) (while (setq val (get-text-property begin prop object) end (text-property-not-all begin to prop val object)) (put-text-property begin end prop (funcall func val) object) (setq begin end)) (if (< begin to) (put-text-property begin to prop (funcall func val) object)))) (defun increase-left-margin (from to inc) "Increase or decrease the left-margin of the region. With no prefix argument, this adds `standard-indent' of indentation. A prefix arg (optional third arg INC noninteractively) specifies the amount to change the margin by, in characters. If `auto-fill-mode' is active, re-fill the region to fit the new margin." (interactive "*r\nP") (setq inc (if inc (prefix-numeric-value inc) standard-indent)) (save-excursion (goto-char from) (skip-chars-backward " \t") (if (bolp) (setq from (point))) (goto-char to) (setq to (point-marker))) (alter-text-property from (marker-position to) 'left-margin ; XEmacs (lambda (v) (max (- left-margin) (+ inc (or v 0))))) (indent-rigidly from (marker-position to) inc) ; XEmacs (if auto-fill-function (save-excursion (fill-region from (marker-position to) nil t t))) ; XEmacs (move-marker to nil)) (defun decrease-left-margin (from to inc) "Make the left margin of the region smaller. With no prefix argument, decrease the indentation by `standard-indent'. A prefix arg (optional third arg INC noninteractively) specifies the amount to change the margin by, in characters. If `auto-fill-mode' is active, re-fill the region to fit the new margin." (interactive "*r\nP") (setq inc (if inc (prefix-numeric-value inc) standard-indent)) (increase-left-margin from to (- inc))) (defun increase-right-margin (from to inc) "Increase the right-margin of the region. With no prefix argument, increase the right margin by `standard-indent'. A prefix arg (optional third arg INC noninteractively) specifies the amount to change the margin by, in characters. A negative argument decreases the right margin width. If `auto-fill-mode' is active, re-fill the region to fit the new margin." (interactive "r\nP") (if (interactive-p) (setq inc (if inc (prefix-numeric-value current-prefix-arg) standard-indent))) (save-excursion (alter-text-property from to 'right-margin (lambda (v) (+ inc (or v 0)))) (if auto-fill-function (fill-region from to nil t t)))) (defun decrease-right-margin (from to inc) "Make the right margin of the region smaller. With no prefix argument, decrease the right margin by `standard-indent'. A prefix arg (optional third arg INC noninteractively) specifies the amount of width to remove, in characters. A negative argument increases the right margin width. If `auto-fill-mode' is active, re-fills region to fit in new margin." (interactive "*r\nP") (setq inc (if inc (prefix-numeric-value inc) standard-indent)) (increase-right-margin from to (- inc))) (defun beginning-of-line-text (&optional n) "Move to the beginning of the text on this line. With optional argument, move forward N-1 lines first. From the beginning of the line, moves past the left-margin indentation, the fill-prefix, and any indentation used for centering or right-justifying the line, but does not move past any whitespace that was explicitly inserted \(such as a tab used to indent the first line of a paragraph)." (interactive "p") (beginning-of-line n) (skip-chars-forward " \t") ;; Skip over fill-prefix. (if (and fill-prefix (not (string-equal fill-prefix ""))) (if (equal fill-prefix (buffer-substring (point) (min (point-max) (+ (length fill-prefix) (point))))) (forward-char (length fill-prefix))) (if (and adaptive-fill-mode adaptive-fill-regexp (looking-at adaptive-fill-regexp)) (goto-char (match-end 0)))) ;; Skip centering or flushright indentation (if (memq (current-justification) '(center right)) (skip-chars-forward " \t"))) (defvar indent-region-function nil "Short cut function to indent region using `indent-according-to-mode'. A value of nil means really run `indent-according-to-mode' on each line.") (defun indent-region (start end column) "Indent each nonblank line in the region. With no argument, indent each line using `indent-according-to-mode', or use `indent-region-function' to do the whole region if that's non-nil. If there is a fill prefix, make each line start with the fill prefix. With argument COLUMN, indent each line to that column. Called from a program, takes three args: START, END and COLUMN." (interactive "r\nP") (if (null column) (if fill-prefix (save-excursion (goto-char end) (setq end (point-marker)) (goto-char start) (let ((regexp (regexp-quote fill-prefix))) (while (< (point) end) (or (looking-at regexp) (and (bolp) (eolp)) (insert fill-prefix)) (forward-line 1)))) (if indent-region-function (funcall indent-region-function start end) (save-excursion (goto-char end) (setq end (point-marker)) (goto-char start) (or (bolp) (forward-line 1)) (while (< (point) end) (or (and (bolp) (eolp)) (funcall indent-line-function)) (forward-line 1)) (move-marker end nil)))) (setq column (prefix-numeric-value column)) (save-excursion (goto-char end) (setq end (point-marker)) (goto-char start) (or (bolp) (forward-line 1)) (while (< (point) end) (delete-region (point) (progn (skip-chars-forward " \t") (point))) (or (eolp) (indent-to column 0)) (forward-line 1)) (move-marker end nil)))) (defun indent-relative-maybe () "Indent a new line like previous nonblank line." (interactive) (indent-relative t)) (defun indent-relative (&optional unindented-ok) "Space out to under next indent point in previous nonblank line. An indent point is a non-whitespace character following whitespace. If the previous nonblank line has no indent points beyond the column point starts at, `tab-to-tab-stop' is done instead." (interactive "P") (if abbrev-mode (expand-abbrev)) (let ((start-column (current-column)) indent) (save-excursion (beginning-of-line) (if (re-search-backward "^[^\n]" nil t) (let ((end (save-excursion (forward-line 1) (point)))) (move-to-column start-column) ;; Is start-column inside a tab on this line? (if (> (current-column) start-column) (backward-char 1)) (or (looking-at "[ \t]") unindented-ok (skip-chars-forward "^ \t" end)) (skip-chars-forward " \t" end) (or (= (point) end) (setq indent (current-column)))))) (if indent (let ((opoint (point-marker))) (delete-region (point) (progn (skip-chars-backward " \t") (point))) (indent-to indent 0) (if (> opoint (point)) (goto-char opoint)) (move-marker opoint nil)) (tab-to-tab-stop)))) (defvar tab-stop-list '(8 16 24 32 40 48 56 64 72 80 88 96 104 112 120) "*List of tab stop positions used by `tab-to-tab-stops'. This should be a list of integers, ordered from smallest to largest.") (defvar edit-tab-stops-map nil "Keymap used in `edit-tab-stops'.") (if edit-tab-stops-map nil (setq edit-tab-stops-map (make-sparse-keymap)) (define-key edit-tab-stops-map "\C-x\C-s" 'edit-tab-stops-note-changes) (define-key edit-tab-stops-map "\C-c\C-c" 'edit-tab-stops-note-changes)) (defvar edit-tab-stops-buffer nil "Buffer whose tab stops are being edited--in case the variable `tab-stop-list' is local in that buffer.") (defun edit-tab-stops () "Edit the tab stops used by `tab-to-tab-stop'. Creates a buffer *Tab Stops* containing text describing the tab stops. A colon indicates a column where there is a tab stop. You can add or remove colons and then do \\<edit-tab-stops-map>\\[edit-tab-stops-note-changes] to make changes take effect." (interactive) (setq edit-tab-stops-buffer (current-buffer)) (switch-to-buffer (get-buffer-create "*Tab Stops*")) ;; #### I18N3 should mark buffer as output-translating (use-local-map edit-tab-stops-map) (make-local-variable 'indent-tabs-mode) (setq indent-tabs-mode nil) (overwrite-mode 1) (setq truncate-lines t) (erase-buffer) (let ((tabs tab-stop-list)) (while tabs (indent-to (car tabs) 0) (insert ?:) (setq tabs (cdr tabs)))) (let ((count 0)) (insert ?\n) (while (< count 8) (insert (+ count ?0)) (insert " ") (setq count (1+ count))) (insert ?\n) (while (> count 0) (insert "0123456789") (setq count (1- count)))) ;; XEmacs (insert (substitute-command-keys "\nTo install changes, type \\<edit-tab-stops-map>\\[edit-tab-stops-note-changes]")) (goto-char (point-min))) (defun edit-tab-stops-note-changes () "Put edited tab stops into effect." (interactive) (let (tabs) (save-excursion (goto-char 1) (end-of-line) (while (search-backward ":" nil t) (setq tabs (cons (current-column) tabs)))) (bury-buffer (prog1 (current-buffer) (switch-to-buffer edit-tab-stops-buffer))) (setq tab-stop-list tabs)) (message "Tab stops installed")) (defun tab-to-tab-stop () "Insert spaces or tabs to next defined tab-stop column. The variable `tab-stop-list' is a list of columns at which there are tab stops. Use \\[edit-tab-stops] to edit them interactively." (interactive) (and abbrev-mode (eq (char-syntax (char-before (point))) ?w) (expand-abbrev)) (let ((tabs tab-stop-list)) (while (and tabs (>= (current-column) (car tabs))) (setq tabs (cdr tabs))) (if tabs (let ((opoint (point))) (skip-chars-backward " \t") (delete-region (point) opoint) (indent-to (car tabs))) (insert ?\ )))) (defun move-to-tab-stop () "Move point to next defined tab-stop column. The variable `tab-stop-list' is a list of columns at which there are tab stops. Use \\[edit-tab-stops] to edit them interactively." (interactive) (let ((tabs tab-stop-list)) (while (and tabs (>= (current-column) (car tabs))) (setq tabs (cdr tabs))) (if tabs (let ((before (point))) (move-to-column (car tabs) t) (save-excursion (goto-char before) ;; If we just added a tab, or moved over one, ;; delete any superfluous spaces before the old point. (if (and (eq (char-before (point)) ?\ ) (eq (char-after (point)) ?\t)) (let ((tabend (* (/ (current-column) tab-width) tab-width))) (while (and (> (current-column) tabend) (eq (char-before (point)) ?\ )) (backward-char 1)) (delete-region (point) before)))))))) ;(define-key global-map "\t" 'indent-for-tab-command) ;(define-key esc-map "\034" 'indent-region) ;(define-key ctl-x-map "\t" 'indent-rigidly) ;(define-key esc-map "i" 'tab-to-tab-stop) ;;; indent.el ends here