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view lisp/list-mode.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 | abe6d1db359e |
| children | 9a1950c1e051 |
line wrap: on
line source
;;; list-mode.el --- Major mode for buffers containing lists of items ;; Copyright (C) 1992-4, 1997 Free Software Foundation, Inc. ;; Copyright (C) 1996, 2000 Ben Wing. ;; Maintainer: XEmacs Development Team ;; Keywords: extensions, 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: Not synched ;;; Commentary: ;; This file is dumped with XEmacs. ;; Cleanup, merging with FSF by Ben Wing, January 1996 ;;; Code: (defvar list-mode-extent nil) (make-variable-buffer-local 'list-mode-extent) (defvar list-mode-map nil "Local map for buffers containing lists of items.") (or list-mode-map (let ((map (setq list-mode-map (make-sparse-keymap 'list-mode-map)))) (suppress-keymap map) (define-key map 'button2up 'list-mode-item-mouse-selected) (define-key map 'button2 'undefined) (define-key map "\C-m" 'list-mode-item-keyboard-selected) ;; ;; The following calls to `substitute-key-definition' losed because ;; they were based on an incorrect assumption that `forward-char' and ;; `backward-char' are bound to keys in the global map. This might not ;; be the case if a user binds motion keys to different functions, ;; and was not actually the case since 20.5 beta 28 or around. ;; ;; (substitute-key-definition 'forward-char 'next-list-mode-item map ;; global-map) ;; (substitute-key-definition 'backward-char 'previous-list-mode-item map ;; global-map) ;; ;; We bind standard keys to motion commands instead. ;; (dolist (key '(kp-right right (control ?f))) (define-key map key 'next-list-mode-item)) (dolist (key '(kp-left left (control ?b))) (define-key map key 'previous-list-mode-item)))) ;; #### We make list-mode-hook, as well as completion-setup-hook and ;; minibuffer-setup-hook, permanent-local so that it's possible to create ;; buffers in these modes and then set up some buffer-specific ;; customizations without resorting to awful kludges. (The problem here ;; is that when you switch a buffer into a mode, reset-buffer is usually ;; called, which destroys all buffer-local settings that you carefully ;; tried to set up when you created the buffer. Therefore, the only way ;; to set these variables is to use the setup hooks -- but if they are ;; not declared permanent local, then any local hook functions that you ;; put on them (which is exactly what you want to do) also get removed, ;; so you would have to resort to putting a global hook function on the ;; setup hook, and then making sure it gets removed later. I actually ;; added some support for doing this with one-shot hooks, but this is ;; clearly not the correct way to do things, and it fails in some cases, ;; particularly when the buffer gets put into the mode more than once, ;; which typically happens with completion buffers, for example.) In ;; fact, all setup hooks should be made permanent local, but I didn't ;; feel like making a global change like this quite yet. The proper way ;; to do it would be to declare new def-style forms, such as defhook and ;; define-local-setup-hook, which are used to initialize hooks in place ;; of the current generic defvars. --ben (put 'list-mode-hook 'permanent-local t) (defvar list-mode-hook nil "Normal hook run when entering List mode.") (defun list-mode () "Major mode for buffer containing lists of items." (interactive) (kill-all-local-variables) (use-local-map list-mode-map) (setq mode-name "List") (setq major-mode 'list-mode) (add-local-hook 'post-command-hook 'set-list-mode-extent) (add-local-hook 'pre-command-hook 'list-mode-extent-pre-hook) (set (make-local-variable 'next-line-add-newlines) nil) (setq list-mode-extent nil) ;; It is visually disconcerting to have the text cursor disappear within list ;; buffers, especially when moving from window to window, so leave it ;; visible. -- Bob Weiner, 06/20/1999 ; (set-specifier text-cursor-visible-p nil (current-buffer)) (setq buffer-read-only t) (goto-char (point-min)) (run-hooks 'list-mode-hook)) ;; List mode is suitable only for specially formatted data. (put 'list-mode 'mode-class 'special) (defvar list-mode-extent-old-point nil "The value of point when pre-command-hook is called. Used to determine the direction of motion.") (make-variable-buffer-local 'list-mode-extent-old-point) (defun list-mode-extent-pre-hook () (setq list-mode-extent-old-point (point)) ;(setq atomic-extent-goto-char-p nil) ) (defun set-list-mode-extent () "Move to the closest list item and set up the extent for it. This is called from `post-command-hook'." (cond ((get-char-property (point) 'list-mode-item)) ((and (> (point) (point-min)) (get-char-property (1- (point)) 'list-mode-item)) (goto-char (1- (point)))) (t (let ((pos (point)) dirflag) ;this fucks things up more than it helps. ;atomic-extent-goto-char-p as currently defined is all broken, ;since it will be triggered if the command *ever* runs goto-char! ;(if atomic-extent-goto-char-p ; (setq dirflag 1) (if (and list-mode-extent-old-point (> pos list-mode-extent-old-point)) (setq dirflag 1) (setq dirflag -1)) (next-list-mode-item dirflag) (or (get-char-property (point) 'list-mode-item) (next-list-mode-item (- dirflag)))))) (or (and list-mode-extent (eq (current-buffer) (extent-object list-mode-extent))) (progn (setq list-mode-extent (make-extent nil nil (current-buffer))) (set-extent-face list-mode-extent 'list-mode-item-selected))) (let ((ex (extent-at (point) nil 'list-mode-item nil 'at))) (if ex (progn (set-extent-endpoints list-mode-extent (extent-start-position ex) (extent-end-position ex)) (auto-show-make-region-visible (extent-start-position ex) (extent-end-position ex))) (detach-extent list-mode-extent)))) (defun previous-list-mode-item (n) "Move to the previous item in list-mode." (interactive "p") (next-list-mode-item (- n))) (defun next-list-mode-item (n) "Move to the next item in list-mode. With prefix argument N, move N items (negative N means move backward)." (interactive "p") (while (and (> n 0) (not (eobp))) (let ((extent (extent-at (point) (current-buffer) 'list-mode-item)) (end (point-max))) ;; If in a completion, move to the end of it. (if extent (goto-char (extent-end-position extent))) ;; Move to start of next one. (or (extent-at (point) (current-buffer) 'list-mode-item) (goto-char (next-single-property-change (point) 'list-mode-item nil end)))) (setq n (1- n))) (while (and (< n 0) (not (bobp))) (let ((extent (extent-at (point) (current-buffer) 'list-mode-item)) (end (point-min))) ;; If in a completion, move to the start of it. (if extent (goto-char (extent-start-position extent))) ;; Move to the start of that one. (if (setq extent (extent-at (point) (current-buffer) 'list-mode-item nil 'before)) (goto-char (extent-start-position extent)) (goto-char (previous-single-property-change (point) 'list-mode-item nil end)) (if (setq extent (extent-at (point) (current-buffer) 'list-mode-item nil 'before)) (goto-char (extent-start-position extent))))) (setq n (1+ n)))) (defun list-mode-item-selected-1 (extent event) (let ((func (extent-property extent 'list-mode-item-activate-callback)) (user-data (extent-property extent 'list-mode-item-user-data))) (if func (funcall func event extent user-data)))) ;; we could make these two be just one function, but we want to be ;; able to refer to them in DOC strings. (defun list-mode-item-keyboard-selected () (interactive) (list-mode-item-selected-1 (extent-at (point) (current-buffer) 'list-mode-item nil 'at) nil)) (defun list-mode-item-mouse-selected (event) (interactive "e") ;; Sometimes event-closest-point returns nil. ;; So beep instead of bombing. (let ((point (event-closest-point event))) (if point (list-mode-item-selected-1 (extent-at point (event-buffer event) 'list-mode-item nil 'at) event) (ding)))) (defun add-list-mode-item (start end &optional buffer activate-callback user-data) "Add a new list item in list-mode, from START to END in BUFFER. BUFFER defaults to the current buffer. This works by creating an extent for the span of text in question. If ACTIVATE-CALLBACK is non-nil, it should be a function of three arguments (EVENT EXTENT USER-DATA) that will be called when button2 is pressed on the extent. USER-DATA comes from the optional USER-DATA argument." (let ((extent (make-extent start end buffer))) (set-extent-property extent 'list-mode-item t) (set-extent-property extent 'start-open t) (if activate-callback (progn (set-extent-property extent 'mouse-face 'highlight) (set-extent-property extent 'list-mode-item-activate-callback activate-callback) (set-extent-property extent 'list-mode-item-user-data user-data))) extent)) ;; Define the major mode for lists of completions. (defvar completion-highlight-first-word-only nil "*Completion will only highlight the first blank delimited word if t. If the variable in not t or nil, the string is taken as a regexp to match for end of highlight") ;; see comment at list-mode-hook. (put 'completion-setup-hook 'permanent-local t) (defvar completion-setup-hook nil "Normal hook run at the end of setting up the text of a completion buffer. When run, the completion buffer is the current buffer.") ; Unnecessary FSFmacs crock. We frob the extents directly in ; display-completion-list, so no "heuristics" like this are necessary. ;(defvar completion-fixup-function nil ; "A function to customize how completions are identified in completion lists. ;`completion-setup-function' calls this function with no arguments ;each time it has found what it thinks is one completion. ;Point is at the end of the completion in the completion list buffer. ;If this function moves point, it can alter the end of that completion.") (defvar completion-default-help-string '(concat (if (device-on-window-system-p) (substitute-command-keys "Click \\<list-mode-map>\\[list-mode-item-mouse-selected] on a completion to select it.\n") "") (substitute-command-keys "Type \\<minibuffer-local-completion-map>\\[advertised-switch-to-completions] or \\[switch-to-completions] to move to this buffer, for keyboard selection.\n\n")) "Form the evaluate to get a help string for completion lists. This string is inserted at the beginning of the buffer. See `display-completion-list'.") (defun display-completion-list (completions &rest cl-keys) "Display the list of completions, COMPLETIONS, using `standard-output'. Each element may be just a symbol or string or may be a list of two strings to be printed as if concatenated. Frob a mousable extent onto each completion. This extent has properties 'mouse-face (so it highlights when the mouse passes over it) and 'list-mode-item (so it can be located). Keywords: :activate-callback (default is `default-choose-completion') See `add-list-mode-item'. :user-data Value passed to activation callback. :window-width If non-nil, width to use in displaying the list, instead of the actual window's width. :window-height If non-nil, use no more than this many lines, and extend line width as necessary. :help-string (default is the value of `completion-default-help-string') Form to evaluate to get a string to insert at the beginning of the completion list buffer. This is evaluated when that buffer is the current buffer and after it has been put into completion-list-mode. :reference-buffer (default is the current buffer) This specifies the value of `completion-reference-buffer' in the completion buffer. This specifies the buffer (normally a minibuffer) that `default-choose-completion' will insert the completion into. At the end, run the normal hook `completion-setup-hook'. It can find the completion buffer in `standard-output'. If `completion-highlight-first-word-only' is non-nil, then only the start of the string is highlighted." ;; #### I18N3 should set standard-output to be (temporarily) ;; output-translating. (cl-parsing-keywords ((:activate-callback 'default-choose-completion) :user-data :reference-buffer (:help-string completion-default-help-string) (:completion-string "Possible completions are:") :window-width :window-height) () (let ((old-buffer (current-buffer)) (bufferp (bufferp standard-output))) (if bufferp (set-buffer standard-output)) (if (null completions) (princ (gettext "There are no possible completions of what you have typed.")) (let ((win-width (or cl-window-width (if bufferp ;; This needs fixing for the case of windows ;; that aren't the same width's the frame. ;; Sadly, the window it will appear in is not known ;; until after the text has been made. ;; We have to use last-nonminibuf-frame here ;; and not selected-frame because if a ;; minibuffer-only frame is being used it will ;; be the selected-frame at the point this is ;; run. We keep the selected-frame call around ;; just in case. (frame-width (or (last-nonminibuf-frame) (selected-frame))) 80)))) (let ((count 0) (max-width 0) old-max-width) ;; Find longest completion (let ((tail completions)) (while tail (let* ((elt (car tail)) (len (cond ((stringp elt) (length elt)) ((and (consp elt) (stringp (car elt)) (stringp (car (cdr elt)))) (+ (length (car elt)) (length (car (cdr elt))))) (t (signal 'wrong-type-argument (list 'stringp elt)))))) (if (> len max-width) (setq max-width len)) (setq count (1+ count) tail (cdr tail))))) (setq max-width (+ 2 max-width)) ; at least two chars between cols (setq old-max-width max-width) (let ((rows (let ((cols (min (/ win-width max-width) count))) (if (<= cols 1) count (progn ;; re-space the columns (setq max-width (/ win-width cols)) (if (/= (% count cols) 0) ; want ceiling... (1+ (/ count cols)) (/ count cols))))))) (when (and cl-window-height (> rows cl-window-height)) (setq max-width old-max-width) (setq rows cl-window-height)) (when (and (stringp cl-completion-string) (> (length cl-completion-string) 0)) (princ (gettext cl-completion-string)) (terpri)) (let ((tail completions) (r 0) (regexp-string (if (eq t completion-highlight-first-word-only) "[ \t]" completion-highlight-first-word-only))) (while (< r rows) (and (> r 0) (terpri)) (let ((indent 0) (column 0) (tail2 tail)) (while tail2 (let ((elt (car tail2))) (if (/= indent 0) (if bufferp (indent-to indent 2) (while (progn (write-char ?\ ) (setq column (1+ column)) (< column indent))))) (setq indent (+ indent max-width)) (let ((start (point)) end) ;; Frob some mousable extents in there too! (if (consp elt) (progn (princ (car elt)) (princ (car (cdr elt))) (or bufferp (setq column (+ column (length (car elt)) (length (car (cdr elt))))))) (progn (princ elt) (or bufferp (setq column (+ column (length elt)))))) (add-list-mode-item start (progn (setq end (point)) (or (and completion-highlight-first-word-only (goto-char start) (re-search-forward regexp-string end t) (match-beginning 0)) end)) nil cl-activate-callback cl-user-data) (goto-char end))) (setq tail2 (nthcdr rows tail2))) (setq tail (cdr tail) r (1+ r))))))))) (if bufferp (set-buffer old-buffer))) (save-excursion (let ((mainbuf (or cl-reference-buffer (current-buffer)))) (set-buffer standard-output) (completion-list-mode) (make-local-variable 'completion-reference-buffer) (setq completion-reference-buffer mainbuf) ;;; The value 0 is right in most cases, but not for file name completion. ;;; so this has to be turned off. ;;; (setq completion-base-size 0) (goto-char (point-min)) (let ((buffer-read-only nil)) (insert (eval cl-help-string))) ;; unnecessary FSFmacs crock ;;(forward-line 1) ;;(while (re-search-forward "[^ \t\n]+\\( [^ \t\n]+\\)*" nil t) ;; (let ((beg (match-beginning 0)) ;; (end (point))) ;; (if completion-fixup-function ;; (funcall completion-fixup-function)) ;; (put-text-property beg (point) 'mouse-face 'highlight) ;; (put-text-property beg (point) 'list-mode-item t) ;; (goto-char end))))) )) (save-excursion (set-buffer standard-output) (run-hooks 'completion-setup-hook)))) (defvar completion-display-completion-list-function 'display-completion-list "Function to set up the list of completions in the completion buffer. The function is called with one argument, the sorted list of completions. Particular minibuffer interface functions (e.g. `read-file-name') may want to change this. To do that, set a local value for this variable in the minibuffer; that ensures that other minibuffer invocations will not be affected.") (defun minibuffer-completion-help () "Display a list of possible completions of the current minibuffer contents. The list of completions is determined by calling `all-completions', passing it the current minibuffer contents, the value of `minibuffer-completion-table', and the value of `minibuffer-completion-predicate'. The list is displayed by calling the value of `completion-display-completion-list-function' on the sorted list of completions, with the standard output set to the completion buffer." (interactive) (message "Making completion list...") (let ((completions (all-completions (buffer-string) minibuffer-completion-table minibuffer-completion-predicate))) (message nil) (if (null completions) (progn (ding nil 'no-completion) (temp-minibuffer-message " [No completions]")) (with-output-to-temp-buffer "*Completions*" (funcall completion-display-completion-list-function (sort completions #'string-lessp)))))) (define-derived-mode completion-list-mode list-mode "Completion List" "Major mode for buffers showing lists of possible completions. \\{completion-list-mode-map}" (make-local-variable 'completion-base-size) (setq completion-base-size nil)) (let ((map completion-list-mode-map)) (define-key map 'button2up 'mouse-choose-completion) (define-key map 'button2 'undefined) (define-key map "\C-m" 'choose-completion) (define-key map "\e\e\e" 'delete-completion-window) (define-key map "\C-g" 'minibuffer-keyboard-quit) (define-key map "q" 'completion-list-mode-quit) (define-key map " " 'completion-switch-to-minibuffer) ;; [Tab] used to switch to the minibuffer but since [space] does that and ;; since most applications in the world use [Tab] to select the next item ;; in a list, do that in the *Completions* buffer too. -- Bob Weiner, ;; BeOpen.com, 06/23/1999. (define-key map "\t" 'next-list-mode-item)) (defvar completion-reference-buffer nil "Record the buffer that was current when the completion list was requested. This is a local variable in the completion list buffer. Initial value is nil to avoid some compiler warnings.") (defvar completion-base-size nil "Number of chars at beginning of minibuffer not involved in completion. This is a local variable in the completion list buffer but it talks about the buffer in `completion-reference-buffer'. If this is nil, it means to compare text to determine which part of the tail end of the buffer's text is involved in completion.") ;; These names are referenced in the doc string for `completion-list-mode'. (defalias 'choose-completion 'list-mode-item-keyboard-selected) (defalias 'mouse-choose-completion 'list-mode-item-mouse-selected) (defun delete-completion-window () "Delete the completion list window. Go to the window from which completion was requested." (interactive) (let ((buf completion-reference-buffer)) (delete-window (selected-window)) (if (get-buffer-window buf) (select-window (get-buffer-window buf))))) (defun completion-switch-to-minibuffer () "Move from a completions buffer to the active minibuffer window." (interactive) (select-window (minibuffer-window))) (defun completion-list-mode-quit () "Abort any recursive edit and bury the completions buffer." (interactive) (condition-case () (abort-recursive-edit) (error nil)) ;; If there was no recursive edit to abort, simply bury the completions ;; list buffer. (if (eq major-mode 'completion-list-mode) (bury-buffer))) (defun completion-do-in-minibuffer () (interactive "_") (save-excursion (set-buffer (window-buffer (minibuffer-window))) (call-interactively (key-binding (this-command-keys))))) (defun default-choose-completion (event extent buffer) "Click on an alternative in the `*Completions*' buffer to choose it." (and (button-event-p event) ;; Give temporary modes such as isearch a chance to turn off. (run-hooks 'mouse-leave-buffer-hook)) (or buffer (setq buffer (symbol-value-in-buffer 'completion-reference-buffer (or (and (button-event-p event) (event-buffer event)) (current-buffer))))) (save-selected-window (and (button-event-p event) (select-window (event-window event))) (if (and (one-window-p t 'selected-frame) (window-dedicated-p (selected-window))) ;; This is a special buffer's frame (iconify-frame (selected-frame)) (or (window-dedicated-p (selected-window)) (bury-buffer)))) (choose-completion-string (extent-string extent) buffer completion-base-size)) ;; Delete the longest partial match for STRING ;; that can be found before POINT. (defun choose-completion-delete-max-match (string) (let ((len (min (length string) (- (point) (point-min))))) (goto-char (- (point) (length string))) (if completion-ignore-case (setq string (downcase string))) (while (and (> len 0) (let ((tail (buffer-substring (point) (+ (point) len)))) (if completion-ignore-case (setq tail (downcase tail))) (not (string= tail (substring string 0 len))))) (setq len (1- len)) (forward-char 1)) (delete-char len))) ;; Switch to BUFFER and insert the completion choice CHOICE. ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text ;; to keep. If it is nil, use choose-completion-delete-max-match instead. (defun choose-completion-string (choice &optional buffer base-size) (let ((buffer (or buffer completion-reference-buffer))) ;; If BUFFER is a minibuffer, barf unless it's the currently ;; active minibuffer. (if (and (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer)) (or (not (active-minibuffer-window)) (not (equal buffer (window-buffer (active-minibuffer-window)))))) (error "Minibuffer is not active for completion") ;; Insert the completion into the buffer where completion was requested. (set-buffer buffer) (if base-size (delete-region (+ base-size (point-min)) (point)) (choose-completion-delete-max-match choice)) (insert choice) (remove-text-properties (- (point) (length choice)) (point) '(highlight nil)) ;; Update point in the window that BUFFER is showing in. (let ((window (get-buffer-window buffer t))) (set-window-point window (point))) ;; If completing for the minibuffer, exit it with this choice. (and (equal buffer (window-buffer (minibuffer-window))) minibuffer-completion-table (exit-minibuffer))))) (define-key minibuffer-local-completion-map [prior] 'switch-to-completions) (define-key minibuffer-local-must-match-map [prior] 'switch-to-completions) (define-key minibuffer-local-completion-map "\M-v" 'advertised-switch-to-completions) (define-key minibuffer-local-must-match-map "\M-v" 'advertised-switch-to-completions) (defalias 'advertised-switch-to-completions 'switch-to-completions) (defun switch-to-completions () "Select the completion list window." (interactive) ;; Make sure we have a completions window. (or (get-buffer-window "*Completions*") (minibuffer-completion-help)) (if (not (get-buffer-window "*Completions*")) nil (select-window (get-buffer-window "*Completions*")) (goto-char (next-single-property-change (point-min) 'list-mode-item nil (point-max))))) ;;; list-mode.el ends here