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781 lines
33 KiB
EmacsLisp
781 lines
33 KiB
EmacsLisp
;;; minibuffer.el --- Minibuffer completion functions
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;; Copyright (C) 2008 Free Software Foundation, Inc.
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;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Names starting with "minibuffer--" are for functions and variables that
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;; are meant to be for internal use only.
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;;; Todo:
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;; - New command minibuffer-force-complete that chooses one of all-completions.
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;; - Add vc-file-name-completion-table to read-file-name-internal.
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;; - A feature like completing-help.el.
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;; - Make the `hide-spaces' arg of all-completions obsolete?
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;;; Code:
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(eval-when-compile (require 'cl))
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(defvar completion-all-completions-with-base-size nil
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"If non-nil, `all-completions' may return the base-size in the last cdr.
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The base-size is the length of the prefix that is elided from each
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element in the returned list of completions. See `completion-base-size'.")
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;;; Completion table manipulation
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(defun completion--some (fun xs)
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"Apply FUN to each element of XS in turn.
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Return the first non-nil returned value.
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Like CL's `some'."
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(let (res)
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(while (and (not res) xs)
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(setq res (funcall fun (pop xs))))
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res))
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(defun apply-partially (fun &rest args)
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"Do a \"curried\" partial application of FUN to ARGS.
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ARGS is a list of the first N arguments to pass to FUN.
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The result is a new function that takes the remaining arguments,
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and calls FUN."
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(lexical-let ((fun fun) (args1 args))
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(lambda (&rest args2) (apply fun (append args1 args2)))))
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(defun complete-with-action (action table string pred)
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"Perform completion ACTION.
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STRING is the string to complete.
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TABLE is the completion table, which should not be a function.
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PRED is a completion predicate.
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ACTION can be one of nil, t or `lambda'."
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;; (assert (not (functionp table)))
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(funcall
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(cond
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((null action) 'try-completion)
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((eq action t) 'all-completions)
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(t 'test-completion))
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string table pred))
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(defun completion-table-dynamic (fun)
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"Use function FUN as a dynamic completion table.
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FUN is called with one argument, the string for which completion is required,
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and it should return an alist containing all the intended possible completions.
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This alist may be a full list of possible completions so that FUN can ignore
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the value of its argument. If completion is performed in the minibuffer,
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FUN will be called in the buffer from which the minibuffer was entered.
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The result of the `dynamic-completion-table' form is a function
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that can be used as the ALIST argument to `try-completion' and
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`all-completions'. See Info node `(elisp)Programmed Completion'."
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(lexical-let ((fun fun))
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(lambda (string pred action)
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(with-current-buffer (let ((win (minibuffer-selected-window)))
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(if (window-live-p win) (window-buffer win)
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(current-buffer)))
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(complete-with-action action (funcall fun string) string pred)))))
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(defmacro lazy-completion-table (var fun)
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"Initialize variable VAR as a lazy completion table.
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If the completion table VAR is used for the first time (e.g., by passing VAR
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as an argument to `try-completion'), the function FUN is called with no
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arguments. FUN must return the completion table that will be stored in VAR.
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If completion is requested in the minibuffer, FUN will be called in the buffer
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from which the minibuffer was entered. The return value of
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`lazy-completion-table' must be used to initialize the value of VAR.
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You should give VAR a non-nil `risky-local-variable' property."
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(declare (debug (symbolp lambda-expr)))
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(let ((str (make-symbol "string")))
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`(completion-table-dynamic
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(lambda (,str)
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(when (functionp ,var)
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(setq ,var (,fun)))
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,var))))
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(defun completion-table-with-context (prefix table string pred action)
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;; TODO: add `suffix' maybe?
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;; Notice that `pred' is not a predicate when called from read-file-name
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;; or Info-read-node-name-2.
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(if (functionp pred)
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(setq pred (lexical-let ((pred pred))
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;; FIXME: this doesn't work if `table' is an obarray.
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(lambda (s) (funcall pred (concat prefix s))))))
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(let ((comp (complete-with-action action table string pred)))
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(cond
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;; In case of try-completion, add the prefix.
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((stringp comp) (concat prefix comp))
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;; In case of non-empty all-completions,
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;; add the prefix size to the base-size.
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((consp comp)
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(let ((last (last comp)))
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(when completion-all-completions-with-base-size
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(setcdr last (+ (or (cdr last) 0) (length prefix))))
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comp))
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(t comp))))
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(defun completion-table-with-terminator (terminator table string pred action)
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(cond
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((eq action nil)
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(let ((comp (try-completion string table pred)))
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(if (eq comp t)
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(concat string terminator)
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(if (and (stringp comp)
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(eq (try-completion comp table pred) t))
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(concat comp terminator)
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comp))))
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((eq action t) (all-completions string table pred))
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;; completion-table-with-terminator is always used for
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;; "sub-completions" so it's only called if the terminator is missing,
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;; in which case `test-completion' should return nil.
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((eq action 'lambda) nil)))
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(defun completion-table-with-predicate (table pred1 strict string pred2 action)
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"Make a completion table equivalent to TABLE but filtered through PRED1.
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PRED1 is a function of one argument which returns non-nil iff the
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argument is an element of TABLE which should be considered for completion.
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STRING, PRED2, and ACTION are the usual arguments to completion tables,
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as described in `try-completion', `all-completions', and `test-completion'.
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If STRICT is t, the predicate always applies; if nil it only applies if
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it does not reduce the set of possible completions to nothing.
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Note: TABLE needs to be a proper completion table which obeys predicates."
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(cond
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((and (not strict) (eq action 'lambda))
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;; Ignore pred1 since it doesn't really have to apply anyway.
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(test-completion string table pred2))
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(t
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(or (complete-with-action action table string
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(if (null pred2) pred1
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(lexical-let ((pred1 pred2) (pred2 pred2))
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(lambda (x)
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;; Call `pred1' first, so that `pred2'
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;; really can't tell that `x' is in table.
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(if (funcall pred1 x) (funcall pred2 x))))))
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;; If completion failed and we're not applying pred1 strictly, try
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;; again without pred1.
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(and (not strict)
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(complete-with-action action table string pred2))))))
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(defun completion-table-in-turn (&rest tables)
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"Create a completion table that tries each table in TABLES in turn."
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(lexical-let ((tables tables))
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(lambda (string pred action)
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(completion--some (lambda (table)
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(complete-with-action action table string pred))
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tables))))
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;; (defmacro complete-in-turn (a b) `(completion-table-in-turn ,a ,b))
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;; (defmacro dynamic-completion-table (fun) `(completion-table-dynamic ,fun))
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(define-obsolete-function-alias
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'complete-in-turn 'completion-table-in-turn "23.1")
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(define-obsolete-function-alias
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'dynamic-completion-table 'completion-table-dynamic "23.1")
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;;; Minibuffer completion
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(defgroup minibuffer nil
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"Controlling the behavior of the minibuffer."
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:link '(custom-manual "(emacs)Minibuffer")
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:group 'environment)
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(defun minibuffer-message (message &rest args)
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"Temporarily display MESSAGE at the end of the minibuffer.
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The text is displayed for `minibuffer-message-timeout' seconds,
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or until the next input event arrives, whichever comes first.
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Enclose MESSAGE in [...] if this is not yet the case.
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If ARGS are provided, then pass MESSAGE through `format'."
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;; Clear out any old echo-area message to make way for our new thing.
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(message nil)
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(setq message (if (and (null args) (string-match "\\[.+\\]" message))
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;; Make sure we can put-text-property.
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(copy-sequence message)
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(concat " [" message "]")))
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(when args (setq message (apply 'format message args)))
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(let ((ol (make-overlay (point-max) (point-max) nil t t)))
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(unwind-protect
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(progn
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(unless (zerop (length message))
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;; The current C cursor code doesn't know to use the overlay's
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;; marker's stickiness to figure out whether to place the cursor
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;; before or after the string, so let's spoon-feed it the pos.
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(put-text-property 0 1 'cursor t message))
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(overlay-put ol 'after-string message)
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(sit-for (or minibuffer-message-timeout 1000000)))
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(delete-overlay ol))))
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(defun minibuffer-completion-contents ()
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"Return the user input in a minibuffer before point as a string.
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That is what completion commands operate on."
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(buffer-substring (field-beginning) (point)))
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(defun delete-minibuffer-contents ()
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"Delete all user input in a minibuffer.
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If the current buffer is not a minibuffer, erase its entire contents."
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(delete-field))
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(defcustom completion-auto-help t
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"Non-nil means automatically provide help for invalid completion input.
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If the value is t the *Completion* buffer is displayed whenever completion
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is requested but cannot be done.
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If the value is `lazy', the *Completions* buffer is only displayed after
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the second failed attempt to complete."
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:type '(choice (const nil) (const t) (const lazy))
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:group 'minibuffer)
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(defvar completion-styles-alist
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'((basic try-completion all-completions)
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;; (partial-completion
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;; completion-pcm--try-completion completion-pcm--all-completions)
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)
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"List of available completion styles.
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Each element has the form (NAME TRY-COMPLETION ALL-COMPLETIONS)
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where NAME is the name that should be used in `completion-styles'
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TRY-COMPLETION is the function that does the completion, and
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ALL-COMPLETIONS is the function that lists the completions.")
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(defcustom completion-styles '(basic)
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"List of completion styles to use."
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:type `(repeat (choice ,@(mapcar (lambda (x) (list 'const (car x)))
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completion-styles-alist)))
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:group 'minibuffer
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:version "23.1")
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(defun completion-try-completion (string table pred)
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;; The property `completion-styles' indicates that this functional
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;; completion-table claims to take care of completion styles itself.
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;; [I.e. It will most likely call us back at some point. ]
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(if (and (symbolp table) (get table 'completion-styles))
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(funcall table string pred nil)
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(completion--some (lambda (style)
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(funcall (nth 1 (assq style completion-styles-alist))
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string table pred))
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completion-styles)))
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(defun completion-all-completions (string table pred)
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;; The property `completion-styles' indicates that this functional
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;; completion-table claims to take care of completion styles itself.
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;; [I.e. It will most likely call us back at some point. ]
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(let ((completion-all-completions-with-base-size t))
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(if (and (symbolp table) (get table 'no-completion-styles))
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(funcall table string pred t)
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(completion--some (lambda (style)
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(funcall (nth 2 (assq style completion-styles-alist))
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string table pred))
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completion-styles))))
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(defun minibuffer--bitset (modified completions exact)
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(logior (if modified 4 0)
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(if completions 2 0)
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(if exact 1 0)))
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(defun completion--do-completion (&optional try-completion-function)
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"Do the completion and return a summary of what happened.
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M = completion was performed, the text was Modified.
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C = there were available Completions.
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E = after completion we now have an Exact match.
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MCE
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000 0 no possible completion
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001 1 was already an exact and unique completion
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010 2 no completion happened
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011 3 was already an exact completion
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100 4 ??? impossible
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101 5 ??? impossible
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110 6 some completion happened
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111 7 completed to an exact completion"
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(let* ((beg (field-beginning))
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(end (point))
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(string (buffer-substring beg end))
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(completion (funcall (or try-completion-function
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'completion-try-completion)
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string
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minibuffer-completion-table
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minibuffer-completion-predicate)))
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(cond
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((null completion)
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(ding) (minibuffer-message "No match") (minibuffer--bitset nil nil nil))
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((eq t completion) (minibuffer--bitset nil nil t)) ;Exact and unique match.
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(t
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;; `completed' should be t if some completion was done, which doesn't
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;; include simply changing the case of the entered string. However,
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;; for appearance, the string is rewritten if the case changes.
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(let ((completed (not (eq t (compare-strings completion nil nil
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string nil nil t))))
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(unchanged (eq t (compare-strings completion nil nil
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string nil nil nil))))
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(unless unchanged
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;; Insert in minibuffer the chars we got.
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(goto-char end)
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(insert completion)
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(delete-region beg end))
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(if (not (or unchanged completed))
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;; The case of the string changed, but that's all. We're not sure
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;; whether this is a unique completion or not, so try again using
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;; the real case (this shouldn't recurse again, because the next
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;; time try-completion will return either t or the exact string).
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(completion--do-completion try-completion-function)
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;; It did find a match. Do we match some possibility exactly now?
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(let ((exact (test-completion (field-string)
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minibuffer-completion-table
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minibuffer-completion-predicate)))
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(unless completed
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;; Show the completion table, if requested.
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(cond
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((not exact)
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(if (case completion-auto-help
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(lazy (eq this-command last-command))
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(t completion-auto-help))
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(minibuffer-completion-help)
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(minibuffer-message "Next char not unique")))
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;; If the last exact completion and this one were the same,
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;; it means we've already given a "Complete but not unique"
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;; message and the user's hit TAB again, so now we give him help.
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((eq this-command last-command)
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(if completion-auto-help (minibuffer-completion-help)))))
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(minibuffer--bitset completed t exact))))))))
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(defun minibuffer-complete ()
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"Complete the minibuffer contents as far as possible.
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Return nil if there is no valid completion, else t.
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If no characters can be completed, display a list of possible completions.
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If you repeat this command after it displayed such a list,
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scroll the window of possible completions."
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(interactive)
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;; If the previous command was not this,
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;; mark the completion buffer obsolete.
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(unless (eq this-command last-command)
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(setq minibuffer-scroll-window nil))
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(let ((window minibuffer-scroll-window))
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;; If there's a fresh completion window with a live buffer,
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;; and this command is repeated, scroll that window.
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(if (window-live-p window)
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(with-current-buffer (window-buffer window)
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(if (pos-visible-in-window-p (point-max) window)
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;; If end is in view, scroll up to the beginning.
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(set-window-start window (point-min) nil)
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;; Else scroll down one screen.
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(scroll-other-window))
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nil)
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(case (completion--do-completion)
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(0 nil)
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(1 (goto-char (field-end))
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(minibuffer-message "Sole completion")
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t)
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(3 (goto-char (field-end))
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(minibuffer-message "Complete, but not unique")
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t)
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(t t)))))
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(defun minibuffer-complete-and-exit ()
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"If the minibuffer contents is a valid completion then exit.
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Otherwise try to complete it. If completion leads to a valid completion,
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a repetition of this command will exit."
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(interactive)
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(let ((beg (field-beginning))
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(end (field-end)))
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(cond
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;; Allow user to specify null string
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((= beg end) (exit-minibuffer))
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((test-completion (buffer-substring beg end)
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minibuffer-completion-table
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minibuffer-completion-predicate)
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(when completion-ignore-case
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;; Fixup case of the field, if necessary.
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(let* ((string (buffer-substring beg end))
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(compl (try-completion
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string
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minibuffer-completion-table
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minibuffer-completion-predicate)))
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(when (and (stringp compl)
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;; If it weren't for this piece of paranoia, I'd replace
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;; the whole thing with a call to do-completion.
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(= (length string) (length compl)))
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(goto-char end)
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(insert compl)
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(delete-region beg end))))
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(exit-minibuffer))
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((eq minibuffer-completion-confirm 'confirm-only)
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;; The user is permitted to exit with an input that's rejected
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;; by test-completion, but at the condition to confirm her choice.
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(if (eq last-command this-command)
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(exit-minibuffer)
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(minibuffer-message "Confirm")
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nil))
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(t
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;; Call do-completion, but ignore errors.
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(case (condition-case nil
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(completion--do-completion)
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(error 1))
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((1 3) (exit-minibuffer))
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(7 (if (not minibuffer-completion-confirm)
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(exit-minibuffer)
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(minibuffer-message "Confirm")
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nil))
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(t nil))))))
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(defun completion--try-word-completion (string table predicate)
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(let ((completion (completion-try-completion string table predicate)))
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(if (not (stringp completion))
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completion
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;; If completion finds next char not unique,
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;; consider adding a space or a hyphen.
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(when (= (length string) (length completion))
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(let ((exts '(" " "-"))
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tem)
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(while (and exts (not (stringp tem)))
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(setq tem (completion-try-completion
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(concat string (pop exts))
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table predicate)))
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(if (stringp tem) (setq completion tem))))
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;; Completing a single word is actually more difficult than completing
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;; as much as possible, because we first have to find the "current
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;; position" in `completion' in order to find the end of the word
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;; we're completing. Normally, `string' is a prefix of `completion',
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;; which makes it trivial to find the position, but with fancier
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;; completion (plus env-var expansion, ...) `completion' might not
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;; look anything like `string' at all.
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(when minibuffer-completing-file-name
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;; In order to minimize the problem mentioned above, let's try to
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;; reduce the different between `string' and `completion' by
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;; mirroring some of the work done in read-file-name-internal.
|
|
(let ((substituted (condition-case nil
|
|
;; Might fail when completing an env-var.
|
|
(substitute-in-file-name string)
|
|
(error string))))
|
|
(unless (eq string substituted)
|
|
(setq string substituted))))
|
|
|
|
;; Make buffer (before point) contain the longest match
|
|
;; of `string's tail and `completion's head.
|
|
(let* ((startpos (max 0 (- (length string) (length completion))))
|
|
(length (- (length string) startpos)))
|
|
(while (and (> length 0)
|
|
(not (eq t (compare-strings string startpos nil
|
|
completion 0 length
|
|
completion-ignore-case))))
|
|
(setq startpos (1+ startpos))
|
|
(setq length (1- length)))
|
|
|
|
(setq string (substring string startpos)))
|
|
|
|
;; Now `string' is a prefix of `completion'.
|
|
|
|
;; Otherwise cut after the first word.
|
|
(if (string-match "\\W" completion (length string))
|
|
;; First find first word-break in the stuff found by completion.
|
|
;; i gets index in string of where to stop completing.
|
|
(substring completion 0 (match-end 0))
|
|
completion))))
|
|
|
|
|
|
(defun minibuffer-complete-word ()
|
|
"Complete the minibuffer contents at most a single word.
|
|
After one word is completed as much as possible, a space or hyphen
|
|
is added, provided that matches some possible completion.
|
|
Return nil if there is no valid completion, else t."
|
|
(interactive)
|
|
(case (completion--do-completion 'completion--try-word-completion)
|
|
(0 nil)
|
|
(1 (goto-char (field-end))
|
|
(minibuffer-message "Sole completion")
|
|
t)
|
|
(3 (goto-char (field-end))
|
|
(minibuffer-message "Complete, but not unique")
|
|
t)
|
|
(t t)))
|
|
|
|
(defun completion--insert-strings (strings)
|
|
"Insert a list of STRINGS into the current buffer.
|
|
Uses columns to keep the listing readable but compact.
|
|
It also eliminates runs of equal strings."
|
|
(when (consp strings)
|
|
(let* ((length (apply 'max
|
|
(mapcar (lambda (s)
|
|
(if (consp s)
|
|
(+ (length (car s)) (length (cadr s)))
|
|
(length s)))
|
|
strings)))
|
|
(window (get-buffer-window (current-buffer) 0))
|
|
(wwidth (if window (1- (window-width window)) 79))
|
|
(columns (min
|
|
;; At least 2 columns; at least 2 spaces between columns.
|
|
(max 2 (/ wwidth (+ 2 length)))
|
|
;; Don't allocate more columns than we can fill.
|
|
;; Windows can't show less than 3 lines anyway.
|
|
(max 1 (/ (length strings) 2))))
|
|
(colwidth (/ wwidth columns))
|
|
(column 0)
|
|
(laststring nil))
|
|
;; The insertion should be "sensible" no matter what choices were made
|
|
;; for the parameters above.
|
|
(dolist (str strings)
|
|
(unless (equal laststring str) ; Remove (consecutive) duplicates.
|
|
(setq laststring str)
|
|
(unless (bolp)
|
|
(insert " \t")
|
|
(setq column (+ column colwidth))
|
|
;; Leave the space unpropertized so that in the case we're
|
|
;; already past the goal column, there is still
|
|
;; a space displayed.
|
|
(set-text-properties (- (point) 1) (point)
|
|
;; We can't just set tab-width, because
|
|
;; completion-setup-function will kill all
|
|
;; local variables :-(
|
|
`(display (space :align-to ,column))))
|
|
(when (< wwidth (+ (max colwidth
|
|
(if (consp str)
|
|
(+ (length (car str)) (length (cadr str)))
|
|
(length str)))
|
|
column))
|
|
(delete-char -2) (insert "\n") (setq column 0))
|
|
(if (not (consp str))
|
|
(put-text-property (point) (progn (insert str) (point))
|
|
'mouse-face 'highlight)
|
|
(put-text-property (point) (progn (insert (car str)) (point))
|
|
'mouse-face 'highlight)
|
|
(put-text-property (point) (progn (insert (cadr str)) (point))
|
|
'mouse-face nil)))))))
|
|
|
|
(defvar completion-common-substring)
|
|
|
|
(defvar completion-setup-hook nil
|
|
"Normal hook run at the end of setting up a completion list buffer.
|
|
When this hook is run, the current buffer is the one in which the
|
|
command to display the completion list buffer was run.
|
|
The completion list buffer is available as the value of `standard-output'.
|
|
The common prefix substring for completion may be available as the value
|
|
of `completion-common-substring'. See also `display-completion-list'.")
|
|
|
|
(defun display-completion-list (completions &optional common-substring)
|
|
"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.
|
|
If it is a list of two strings, the first is the actual completion
|
|
alternative, the second serves as annotation.
|
|
`standard-output' must be a buffer.
|
|
The actual completion alternatives, as inserted, are given `mouse-face'
|
|
properties of `highlight'.
|
|
At the end, this runs the normal hook `completion-setup-hook'.
|
|
It can find the completion buffer in `standard-output'.
|
|
The optional second arg COMMON-SUBSTRING is a string.
|
|
It is used to put faces, `completions-first-difference' and
|
|
`completions-common-part' on the completion buffer. The
|
|
`completions-common-part' face is put on the common substring
|
|
specified by COMMON-SUBSTRING. If COMMON-SUBSTRING is nil
|
|
and the current buffer is not the minibuffer, the faces are not put.
|
|
Internally, COMMON-SUBSTRING is bound to `completion-common-substring'
|
|
during running `completion-setup-hook'."
|
|
(if (not (bufferp standard-output))
|
|
;; This *never* (ever) happens, so there's no point trying to be clever.
|
|
(with-temp-buffer
|
|
(let ((standard-output (current-buffer))
|
|
(completion-setup-hook nil))
|
|
(display-completion-list completions))
|
|
(princ (buffer-string)))
|
|
|
|
(with-current-buffer standard-output
|
|
(goto-char (point-max))
|
|
(if (null completions)
|
|
(insert "There are no possible completions of what you have typed.")
|
|
|
|
(insert "Possible completions are:\n")
|
|
(let ((last (last completions)))
|
|
;; Get the base-size from the tail of the list.
|
|
(set (make-local-variable 'completion-base-size) (or (cdr last) 0))
|
|
(setcdr last nil)) ;Make completions a properly nil-terminated list.
|
|
(completion--insert-strings completions))))
|
|
|
|
(let ((completion-common-substring common-substring))
|
|
(run-hooks 'completion-setup-hook))
|
|
nil)
|
|
|
|
(defun minibuffer-completion-help ()
|
|
"Display a list of possible completions of the current minibuffer contents."
|
|
(interactive)
|
|
(message "Making completion list...")
|
|
(let* ((string (field-string))
|
|
(completions (completion-all-completions
|
|
string
|
|
minibuffer-completion-table
|
|
minibuffer-completion-predicate)))
|
|
(message nil)
|
|
(if (and completions
|
|
(or (consp (cdr completions))
|
|
(not (equal (car completions) string))))
|
|
(with-output-to-temp-buffer "*Completions*"
|
|
(let* ((last (last completions))
|
|
(base-size (cdr last)))
|
|
;; Remove the base-size tail because `sort' requires a properly
|
|
;; nil-terminated list.
|
|
(when last (setcdr last nil))
|
|
(display-completion-list (nconc (sort completions 'string-lessp)
|
|
base-size))))
|
|
|
|
;; If there are no completions, or if the current input is already the
|
|
;; only possible completion, then hide (previous&stale) completions.
|
|
(let ((window (and (get-buffer "*Completions*")
|
|
(get-buffer-window "*Completions*" 0))))
|
|
(when (and (window-live-p window) (window-dedicated-p window))
|
|
(condition-case ()
|
|
(delete-window window)
|
|
(error (iconify-frame (window-frame window))))))
|
|
(ding)
|
|
(minibuffer-message
|
|
(if completions "Sole completion" "No completions")))
|
|
nil))
|
|
|
|
(defun exit-minibuffer ()
|
|
"Terminate this minibuffer argument."
|
|
(interactive)
|
|
;; If the command that uses this has made modifications in the minibuffer,
|
|
;; we don't want them to cause deactivation of the mark in the original
|
|
;; buffer.
|
|
;; A better solution would be to make deactivate-mark buffer-local
|
|
;; (or to turn it into a list of buffers, ...), but in the mean time,
|
|
;; this should do the trick in most cases.
|
|
(setq deactivate-mark nil)
|
|
(throw 'exit nil))
|
|
|
|
(defun self-insert-and-exit ()
|
|
"Terminate minibuffer input."
|
|
(interactive)
|
|
(if (characterp last-command-char)
|
|
(call-interactively 'self-insert-command)
|
|
(ding))
|
|
(exit-minibuffer))
|
|
|
|
(defun minibuffer--double-dollars (str)
|
|
(replace-regexp-in-string "\\$" "$$" str))
|
|
|
|
(defun completion--make-envvar-table ()
|
|
(mapcar (lambda (enventry)
|
|
(substring enventry 0 (string-match "=" enventry)))
|
|
process-environment))
|
|
|
|
(defun completion--embedded-envvar-table (string pred action)
|
|
(when (string-match (concat "\\(?:^\\|[^$]\\(?:\\$\\$\\)*\\)"
|
|
"$\\([[:alnum:]_]*\\|{\\([^}]*\\)\\)\\'")
|
|
string)
|
|
(let* ((beg (or (match-beginning 2) (match-beginning 1)))
|
|
(table (completion--make-envvar-table))
|
|
(prefix (substring string 0 beg)))
|
|
(if (eq (aref string (1- beg)) ?{)
|
|
(setq table (apply-partially 'completion-table-with-terminator
|
|
"}" table)))
|
|
(completion-table-with-context prefix table
|
|
(substring string beg)
|
|
pred action))))
|
|
|
|
(defun completion--file-name-table (string pred action)
|
|
"Internal subroutine for `read-file-name'. Do not call this."
|
|
(if (and (zerop (length string)) (eq 'lambda action))
|
|
nil ; FIXME: why?
|
|
(let* ((dir (if (stringp pred)
|
|
;; It used to be that `pred' was abused to pass `dir'
|
|
;; as an argument.
|
|
(prog1 (expand-file-name pred) (setq pred nil))
|
|
default-directory))
|
|
(str (condition-case nil
|
|
(substitute-in-file-name string)
|
|
(error string)))
|
|
(name (file-name-nondirectory str))
|
|
(specdir (file-name-directory str))
|
|
(realdir (if specdir (expand-file-name specdir dir)
|
|
(file-name-as-directory dir))))
|
|
|
|
(cond
|
|
((null action)
|
|
(let ((comp (file-name-completion name realdir
|
|
read-file-name-predicate)))
|
|
(if (stringp comp)
|
|
;; Requote the $s before returning the completion.
|
|
(minibuffer--double-dollars (concat specdir comp))
|
|
;; Requote the $s before checking for changes.
|
|
(setq str (minibuffer--double-dollars str))
|
|
(if (string-equal string str)
|
|
comp
|
|
;; If there's no real completion, but substitute-in-file-name
|
|
;; changed the string, then return the new string.
|
|
str))))
|
|
|
|
((eq action t)
|
|
(let ((all (file-name-all-completions name realdir))
|
|
;; Actually, this is not always right in the presence of
|
|
;; envvars, but there's not much we can do, I think.
|
|
(base-size (length (file-name-directory string))))
|
|
|
|
;; Check the predicate, if necessary.
|
|
(unless (memq read-file-name-predicate '(nil file-exists-p))
|
|
(let ((comp ())
|
|
(pred
|
|
(if (eq read-file-name-predicate 'file-directory-p)
|
|
;; Brute-force speed up for directory checking:
|
|
;; Discard strings which don't end in a slash.
|
|
(lambda (s)
|
|
(let ((len (length s)))
|
|
(and (> len 0) (eq (aref s (1- len)) ?/))))
|
|
;; Must do it the hard (and slow) way.
|
|
read-file-name-predicate)))
|
|
(let ((default-directory realdir))
|
|
(dolist (tem all)
|
|
(if (funcall pred tem) (push tem comp))))
|
|
(setq all (nreverse comp))))
|
|
|
|
(if (and completion-all-completions-with-base-size (consp all))
|
|
;; Add base-size, but only if the list is non-empty.
|
|
(nconc all base-size))
|
|
|
|
all))
|
|
|
|
(t
|
|
;; Only other case actually used is ACTION = lambda.
|
|
(let ((default-directory dir))
|
|
(funcall (or read-file-name-predicate 'file-exists-p) str)))))))
|
|
|
|
(defalias 'read-file-name-internal
|
|
(completion-table-in-turn 'completion--embedded-envvar-table
|
|
'completion--file-name-table)
|
|
"Internal subroutine for `read-file-name'. Do not call this.")
|
|
|
|
(defun internal-complete-buffer-except (&optional buffer)
|
|
"Perform completion on all buffers excluding BUFFER.
|
|
Like `internal-complete-buffer', but removes BUFFER from the completion list."
|
|
(lexical-let ((except (if (stringp buffer) buffer (buffer-name buffer))))
|
|
(apply-partially 'completion-table-with-predicate
|
|
'internal-complete-buffer
|
|
(lambda (name)
|
|
(not (equal (if (consp name) (car name) name) except)))
|
|
nil)))
|
|
|
|
(provide 'minibuffer)
|
|
|
|
;; arch-tag: ef8a0a15-1080-4790-a754-04017c02f08f
|
|
;;; minibuffer.el ends here
|