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- ;;; 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-kbd-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
-
-