mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-10 09:12:15 +00:00
288 lines
11 KiB
EmacsLisp
288 lines
11 KiB
EmacsLisp
;;; icomplete.el --- minibuffer completion incremental feedback
|
||
|
||
;; Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
|
||
|
||
;; Author: Ken Manheimer <klm@nist.gov>
|
||
;; Maintainer: Ken Manheimer <klm@nist.gov>
|
||
;; Created: Mar 1993 klm@nist.gov - first release to usenet
|
||
;; Keywords: help, abbrev
|
||
|
||
;; This file is part of GNU Emacs.
|
||
|
||
;; GNU Emacs 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.
|
||
|
||
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
|
||
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
;; Boston, MA 02111-1307, USA.
|
||
|
||
;;; Commentary:
|
||
|
||
;; Loading this package implements a more fine-grained minibuffer
|
||
;; completion feedback scheme. Prospective completions are concisely
|
||
;; indicated within the minibuffer itself, with each successive
|
||
;; keystroke.
|
||
|
||
;; See 'icomplete-completions' docstring for a description of the
|
||
;; icomplete display format.
|
||
|
||
;; See the `icomplete-minibuffer-setup-hook' docstring for a means to
|
||
;; customize icomplete setup for interoperation with other
|
||
;; minibuffer-oriented packages.
|
||
|
||
;; To activate icomplete mode, simply load the package. You can
|
||
;; subsequently deactivate it by invoking the function icomplete-mode
|
||
;; with a negative prefix-arg (C-U -1 ESC-x icomplete-mode). Also,
|
||
;; you can prevent activation of the mode during package load by
|
||
;; first setting the variable `icomplete-mode' to nil. Icompletion
|
||
;; can be enabled any time after the package is loaded by invoking
|
||
;; icomplete-mode without a prefix arg.
|
||
|
||
;; Thanks to everyone for their suggestions for refinements of this
|
||
;; package. I particularly have to credit Michael Cook, who
|
||
;; implemented an incremental completion style in his 'iswitch'
|
||
;; functions that served as a model for icomplete. Some other
|
||
;; contributors: Noah Freidman (restructuring as minor mode), Colin
|
||
;; Rafferty (lemacs reconciliation), Lars Lindberg, RMS, and
|
||
;; others.
|
||
|
||
;; klm.
|
||
|
||
;;; Code:
|
||
|
||
;;;_* Provide
|
||
(provide 'icomplete)
|
||
|
||
;;;_* User Customization variables
|
||
|
||
;;;_* Initialization
|
||
;;;_ = icomplete-minibuffer-setup-hook
|
||
(defvar icomplete-minibuffer-setup-hook nil
|
||
"*Icomplete-specific customization of minibuffer setup.
|
||
|
||
This hook is run during minibuffer setup iff icomplete will be active.
|
||
It is intended for use in customizing icomplete for interoperation
|
||
with other packages. For instance:
|
||
|
||
\(add-hook 'icomplete-minibuffer-setup-hook
|
||
\(function
|
||
\(lambda ()
|
||
\(make-local-variable 'resize-minibuffer-window-max-height)
|
||
\(setq resize-minibuffer-window-max-height 3))))
|
||
|
||
will constrain rsz-mini to a maximum minibuffer height of 3 lines when
|
||
icompletion is occurring.")
|
||
|
||
;;;_ + Internal Variables
|
||
;;;_ = icomplete-mode
|
||
(defvar icomplete-mode t
|
||
"Non-nil enables incremental minibuffer completion, once
|
||
`\\[icomplete-mode]' function has set things up.")
|
||
;;;_ = icomplete-eoinput 1
|
||
(defvar icomplete-eoinput 1
|
||
"Point where minibuffer input ends and completion info begins.")
|
||
(make-variable-buffer-local 'icomplete-eoinput)
|
||
;;;_ = icomplete-pre-command-hook
|
||
(defvar icomplete-pre-command-hook nil
|
||
"Incremental-minibuffer-completion pre-command-hook.
|
||
|
||
Is run in minibuffer before user input when `icomplete-mode' is non-nil.
|
||
Use `icomplete-mode' function to set it up properly for incremental
|
||
minibuffer completion.")
|
||
(add-hook 'icomplete-pre-command-hook 'icomplete-tidy)
|
||
;;;_ = icomplete-post-command-hook
|
||
(defvar icomplete-post-command-hook nil
|
||
"Incremental-minibuffer-completion post-command-hook.
|
||
|
||
Is run in minibuffer after user input when `icomplete-mode' is non-nil.
|
||
Use `icomplete-mode' function to set it up properly for incremental
|
||
minibuffer completion.")
|
||
(add-hook 'icomplete-post-command-hook 'icomplete-exhibit)
|
||
|
||
;;;_ > icomplete-mode (&optional prefix)
|
||
;;;###autoload
|
||
(defun icomplete-mode (&optional prefix)
|
||
"Activate incremental minibuffer completion for this emacs session,
|
||
or deactivate with negative prefix arg."
|
||
(interactive "p")
|
||
(or prefix (setq prefix 0))
|
||
(cond ((>= prefix 0)
|
||
(setq icomplete-mode t)
|
||
;; The following is not really necessary after first time -
|
||
;; no great loss.
|
||
(add-hook 'minibuffer-setup-hook 'icomplete-minibuffer-setup))
|
||
(t (setq icomplete-mode nil))))
|
||
|
||
;;;_ > icomplete-simple-completing-p ()
|
||
(defun icomplete-simple-completing-p ()
|
||
|
||
"Non-nil if current window is minibuffer that's doing simple completion.
|
||
|
||
Conditions are:
|
||
the selected window is a minibuffer,
|
||
and not in the middle of macro execution,
|
||
and minibuffer-completion-table is not a symbol (which would
|
||
indicate some non-standard, non-simple completion mechanism,
|
||
like file-name and other custom-func completions)."
|
||
|
||
(and (window-minibuffer-p (selected-window))
|
||
(not executing-macro)
|
||
(not (symbolp minibuffer-completion-table))))
|
||
|
||
;;;_ > icomplete-minibuffer-setup ()
|
||
;;;###autoload
|
||
(defun icomplete-minibuffer-setup ()
|
||
"Run in minibuffer on activation to establish incremental completion.
|
||
Usually run by inclusion in `minibuffer-setup-hook'."
|
||
(cond ((and icomplete-mode (icomplete-simple-completing-p))
|
||
(make-local-hook 'pre-command-hook)
|
||
(add-hook 'pre-command-hook
|
||
(function (lambda ()
|
||
(run-hooks 'icomplete-pre-command-hook)))
|
||
nil t)
|
||
(make-local-hook 'post-command-hook)
|
||
(add-hook 'post-command-hook
|
||
(function (lambda ()
|
||
(run-hooks 'icomplete-post-command-hook)))
|
||
nil t)
|
||
(run-hooks 'icomplete-minibuffer-setup-hook))))
|
||
|
||
;;;_* Completion
|
||
|
||
;;;_ > icomplete-tidy ()
|
||
(defun icomplete-tidy ()
|
||
"Remove completions display \(if any) prior to new user input.
|
||
Should be run in on the minibuffer `pre-command-hook'. See `icomplete-mode'
|
||
and `minibuffer-setup-hook'."
|
||
(if (icomplete-simple-completing-p)
|
||
(if (and (boundp 'icomplete-eoinput)
|
||
icomplete-eoinput)
|
||
|
||
(if (> icomplete-eoinput (point-max))
|
||
;; Oops, got rug pulled out from under us - reinit:
|
||
(setq icomplete-eoinput (point-max))
|
||
(let ((buffer-undo-list buffer-undo-list )) ; prevent entry
|
||
(delete-region icomplete-eoinput (point-max))))
|
||
|
||
;; Reestablish the local variable 'cause minibuffer-setup is weird:
|
||
(make-local-variable 'icomplete-eoinput)
|
||
(setq icomplete-eoinput 1))))
|
||
|
||
;;;_ > icomplete-exhibit ()
|
||
(defun icomplete-exhibit ()
|
||
"Insert icomplete completions display.
|
||
Should be run via minibuffer `post-command-hook'. See `icomplete-mode'
|
||
and `minibuffer-setup-hook'."
|
||
(if (icomplete-simple-completing-p)
|
||
(let ((contents (buffer-substring (point-min)(point-max)))
|
||
(buffer-undo-list t))
|
||
(save-excursion
|
||
(goto-char (point-max))
|
||
; Register the end of input, so we
|
||
; know where the extra stuff
|
||
; (match-status info) begins:
|
||
(if (not (boundp 'icomplete-eoinput))
|
||
;; In case it got wiped out by major mode business:
|
||
(make-local-variable 'icomplete-eoinput))
|
||
(setq icomplete-eoinput (point))
|
||
; Insert the match-status information:
|
||
(if (> (point-max) 1)
|
||
(insert-string
|
||
(icomplete-completions contents
|
||
minibuffer-completion-table
|
||
minibuffer-completion-predicate
|
||
(not
|
||
minibuffer-completion-confirm))))))))
|
||
|
||
;;;_ > icomplete-completions (name candidates predicate require-match)
|
||
(defun icomplete-completions (name candidates predicate require-match)
|
||
"Identify prospective candidates for minibuffer completion.
|
||
|
||
The display is updated with each minibuffer keystroke during
|
||
minibuffer completion.
|
||
|
||
Prospective completion suffixes (if any) are displayed, bracketed by
|
||
one of \(), \[], or \{} pairs. The choice of brackets is as follows:
|
||
|
||
\(...) - a single prospect is identified and matching is enforced,
|
||
\[...] - a single prospect is identified but matching is optional, or
|
||
\{...} - multiple prospects, separated by commas, are indicated, and
|
||
further input is required to distinguish a single one.
|
||
|
||
The displays for unambiguous matches have ` [Matched]' appended
|
||
\(whether complete or not), or ` \[No matches]', if no eligible
|
||
matches exist."
|
||
|
||
(let ((comps (all-completions name candidates predicate))
|
||
; "-determined" - only one candidate
|
||
(open-bracket-determined (if require-match "(" "["))
|
||
(close-bracket-determined (if require-match ")" "]"))
|
||
;"-prospects" - more than one candidate
|
||
(open-bracket-prospects "{")
|
||
(close-bracket-prospects "}")
|
||
)
|
||
(cond ((null comps) (format " %sNo matches%s"
|
||
open-bracket-determined
|
||
close-bracket-determined))
|
||
((null (cdr comps)) ;one match
|
||
(concat (if (and (> (length (car comps))
|
||
(length name)))
|
||
(concat open-bracket-determined
|
||
(substring (car comps) (length name))
|
||
close-bracket-determined)
|
||
"")
|
||
" [Matched]"))
|
||
(t ;multiple matches
|
||
(let* ((most (try-completion name candidates predicate))
|
||
(most-len (length most))
|
||
most-is-exact
|
||
(alternatives
|
||
(apply
|
||
(function concat)
|
||
(cdr (apply
|
||
(function nconc)
|
||
(mapcar '(lambda (com)
|
||
(if (= (length com) most-len)
|
||
;; Most is one exact match,
|
||
;; note that and leave out
|
||
;; for later indication:
|
||
(progn
|
||
(setq most-is-exact t)
|
||
())
|
||
(list ","
|
||
(substring com
|
||
most-len))))
|
||
comps))))))
|
||
(concat (and (> most-len (length name))
|
||
(concat open-bracket-determined
|
||
(substring most (length name))
|
||
close-bracket-determined))
|
||
open-bracket-prospects
|
||
(if most-is-exact
|
||
(concat "," alternatives)
|
||
alternatives)
|
||
close-bracket-prospects))))))
|
||
|
||
;;;_ + Initialization
|
||
;;; If user hasn't setq-default icomplete-mode to nil, then setup for
|
||
;;; activation:
|
||
(if icomplete-mode
|
||
(icomplete-mode))
|
||
|
||
|
||
;;;_* Local emacs vars.
|
||
;;;Local variables:
|
||
;;;outline-layout: (-2 :)
|
||
;;;End:
|
||
|
||
;;; icomplete.el ends here
|
||
|