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emacs/lisp/hippie-exp.el
Richard M. Stallman 1707b2dade (he-dabbrev-skip-space): Fix previous change. 
(he-dabbrev-as-symbol): Likewise.
1997-07-04 00:44:33 +00:00

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;;; hippie-exp.el --- expand text trying various ways to find its expansion.
;; Copyright (C) 1992 Free Software Foundation, Inc.
;; Author: Anders Holst <aho@sans.kth.se>
;; Last change: 28 May 1997
;; Version: 1.5
;; Keywords: 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:
;; `hippie-expand' is a single function for a lot of different kinds
;; of completions and expansions. Called repeatedly it tries all
;; possible completions in succession.
;; Which kinds of completions to try, and in which order, is
;; determined by the contents of `hippie-expand-try-functions-list'.
;; Much customization of `hippie-expand' can be made by changing the
;; order of, removing, or inserting new functions in this list.
;; Given a positive numeric argument, `hippie-expand' jumps directly
;; ARG functions forward in this list. Given some other argument
;; (a negative argument or just Ctrl-U) it undoes the tried
;; completion.
;;
;; If the variable `hippie-expand-verbose' is non-nil, `hippie-expand'
;; outputs in a message which try-function in the list that is used
;; currently (ie. was used currently and will be tried first the next
;; time).
;; The variable `hippie-expand-max-buffers' determines in how many
;; buffers, apart from the current, to search for expansions in. It
;; is used by the try-functions named "-all-buffers".
;; The variable `hippie-expand-ignore-buffers' is a list of regexps
;; matching buffer names (as strings) or major modes (as atoms) of
;; buffers that should not be searched by the try-functions named
;; "-all-buffers".
;; See also the macro `make-hippie-expand-function' below.
;;
;; A short description of the current try-functions in this file:
;; `try-complete-file-name' : very convenient to have in any buffer,
;; and not just in the minibuffer or (some) shell-mode. It goes
;; through all possible completions instead of just completing as
;; much as is unique.
;; `try-complete-file-name-partially' : To insert in the list just
;; before `try-complete-file-name' for those who want first to get
;; a file name completed only as many characters as is unique.
;; `try-expand-all-abbrevs' : can be removed if you don't use abbrevs.
;; Otherwise it looks through all abbrev-tables, starting with
;; the local followed by the global.
;; `try-expand-line' : Searches the buffer for an entire line that
;; begins exactly as the current line. Convenient sometimes, for
;; example as a substitute for (or complement to) the history
;; list in shell-like buffers. At other times, only confusing.
;; `try-expand-line-all-buffers' : Like `try-expand-line' but searches
;; in all buffers (except the current). (This may be a little
;; slow, don't use it unless you are really fond of `hippie-expand'.)
;; `try-expand-list' : Tries to expand the text back to the nearest
;; open delimiter, to a whole list from the buffer. Convenient for
;; example when writing lisp or TeX.
;; `try-expand-list-all-buffers' : Like `try-expand-list' but searches
;; in all buffers (except the current).
;; `try-expand-dabbrev' : works exactly as dabbrev-expand (but of
;; course in a way compatible with the other try-functions).
;; `try-expand-dabbrev-all-buffers' : perhaps the most useful of them,
;; like `dabbrev-expand' but searches all Emacs buffers (except the
;; current) for matching words. (No, I don't find this one
;; particularly slow.)
;; `try-expand-dabbrev-visible': Searches the currently visible parts of
;; all windows. Can be put before `try-expand-dabbrev-all-buffers' to
;; first try the expansions you can see.
;; `try-expand-dabbrev-from-kill': Searches the kill ring for a suitable
;; completion of the word. Good to have, just in case the word was not
;; found elsewhere.
;; `try-expand-whole-kill' : Tries to complete text with a whole entry
;; from the kill ring. May be good if you don't know how far up in
;; the kill-ring the required entry is, and don't want to mess with
;; "Choose Next Paste".
;; `try-complete-lisp-symbol' : like `lisp-complete-symbol', but goes
;; through all possibilities instead of completing what is unique.
;; Might be tedious (usually a lot of possible completions) and
;; since its function is much like `lisp-complete-symbol', which
;; already has a key of its own, you might want to remove this.
;; `try-complete-lisp-symbol-partially' : To insert in the list just
;; before `try-complete-lisp-symbol' for those who first want to get
;; completion of what is unique in the name.
;;
;; Not all of the above functions are by default in
;; `hippie-expand-try-functions-list'. This variable is better set
;; in ".emacs" to make `hippie-expand' behave maximally convenient
;; according to personal taste. Also, instead of loading the
;; variable with all kinds of try-functions above, it might be an
;; idea to use `make-hippie-expand-function' to construct different
;; `hippie-expand'-like functions, with different try-lists and bound
;; to different keys. It is also possible to make
;; `hippie-expand-try-functions-list' a buffer local variable, and
;; let it depend on the mode (by setting it in the mode-hooks).
;;
;; To write new try-functions, consider the following:
;; Each try-function takes one argument OLD which is nil the first
;; time the function is called and true in succeeding calls for the
;; same string to complete. The first time the function has to
;; extract the string before point to complete, and substitute the
;; first completion alternative for it. On following calls it has to
;; substitute the next possible completion for the last tried string.
;; The try-function is to return t as long as it finds new
;; possible completions. When there are no more alternatives it has
;; to restore the text before point to its original contents, and
;; return nil (don't beep or message or anything).
;; The try-function can (should) use the following functions:
;; `he-init-string' : Initializes the text to substitute to the
;; contents of the region BEGIN to END. Also sets the variable
;; `he-search-string' to the text to expand.
;; `he-substitute-string' : substitutes STR into the region
;; initialized with `he-init-string'. (An optional second argument
;; TRANS-CASE non-nil, means transfer of case from the abbreviation
;; to the expansion is ok if that is enabled in the buffer.)
;; `he-reset-string' : Resets the initialized region to its original
;; contents.
;; There is also a variable: `he-tried-table' which is meant to contain
;; all tried expansions so far. The try-function can check this
;; variable to see whether an expansion has already been tried
;; (hint: `he-string-member').
;;
;; Known bugs
;;
;; It may happen that some completion suggestion occurs twice, in
;; spite of the use of `he-tried-table' to prevent that. This is
;; because different try-functions may try to complete different
;; lengths of text, and thus put different amounts of the
;; text in `he-tried-table'. Anyway this seems to occur seldom enough
;; not to be too disturbing. Also it should NOT be possible for the
;; opposite situation to occur, that `hippie-expand' misses some
;; suggestion because it thinks it has already tried it.
;;
;; Acknowledgement
;;
;; I want to thank Mikael Djurfeldt in discussions with whom the idea
;; of this function took form.
;; I am also grateful to all those who have given me suggestions on
;; how to improve it, and all those who helped to find and remove bugs.
;;
;;; Code:
(defgroup hippie-expand nil
"Expand text trying various ways to find its expansion."
:group 'abbrev)
(defcustom he-dabbrev-skip-space nil
"Non-nil means tolerate trailing spaces in the abbreviation to expand."
:group 'hippie-expand
:type 'boolean)
(defcustom he-dabbrev-as-symbol t
"Non-nil means expand as symbols, i.e. syntax `_' is considered a letter."
:group 'hippie-expand
:type 'boolean)
(defvar he-num -1)
(defvar he-string-beg (make-marker))
(defvar he-string-end (make-marker))
(defvar he-search-string ())
(defvar he-expand-list ())
(defvar he-tried-table ())
(defvar he-search-loc (make-marker))
(defvar he-search-loc2 ())
(defvar he-search-bw ())
(defvar he-search-bufs ())
(defvar he-searched-n-bufs ())
(defvar he-search-window ())
;;;###autoload
(defvar hippie-expand-try-functions-list '(try-complete-file-name-partially
try-complete-file-name
try-expand-all-abbrevs
try-expand-list
try-expand-line
try-expand-dabbrev
try-expand-dabbrev-all-buffers
try-expand-dabbrev-from-kill
try-complete-lisp-symbol-partially
try-complete-lisp-symbol)
"The list of expansion functions tried in order by `hippie-expand'.
To change the behavior of `hippie-expand', remove, change the order of,
or insert functions in this list.")
;;;###autoload
(defcustom hippie-expand-verbose t
"*Non-nil makes `hippie-expand' output which function it is trying."
:type 'boolean
:group 'hippie-expand)
;;;###autoload
(defcustom hippie-expand-max-buffers ()
"*The maximum number of buffers (apart from the current) searched.
If nil, all buffers are searched."
:type '(choice (const :tag "All" nil)
integer)
:group 'hippie-expand)
;;;###autoload
(defcustom hippie-expand-ignore-buffers '("^ \\*.*\\*$" dired-mode)
"*A list specifying which buffers not to search (if not current).
Can contain both regexps matching buffer names (as strings) and major modes
\(as atoms)"
:type '(repeat (choice regexp (symbol :tag "Major Mode")))
:group 'hippie-expand)
;;;###autoload
(defun hippie-expand (arg)
"Try to expand text before point, using multiple methods.
The expansion functions in `hippie-expand-try-functions-list' are
tried in order, until a possible expansion is found. Repeated
application of `hippie-expand' inserts successively possible
expansions.
With a positive numeric argument, jumps directly to the ARG next
function in this list. With a negative argument or just \\[universal-argument],
undoes the expansion."
(interactive "P")
(if (or (not arg)
(and (integerp arg) (> arg 0)))
(let ((first (or (= he-num -1)
(not (equal this-command last-command)))))
(if first
(progn
(setq he-num -1)
(setq he-tried-table nil)))
(if arg
(if (not first) (he-reset-string))
(setq arg 0))
(let ((i (max (+ he-num arg) 0)))
(while (not (or (>= i (length hippie-expand-try-functions-list))
(apply (nth i hippie-expand-try-functions-list)
(list (= he-num i)))))
(setq i (1+ i)))
(setq he-num i))
(if (>= he-num (length hippie-expand-try-functions-list))
(progn
(setq he-num -1)
(if first
(message "No expansion found")
(message "No further expansions found"))
(ding))
(if (and hippie-expand-verbose
(not (window-minibuffer-p (selected-window))))
(message "Using %s"
(nth he-num hippie-expand-try-functions-list)))))
(if (and (>= he-num 0)
(eq (marker-buffer he-string-beg) (current-buffer)))
(progn
(setq he-num -1)
(he-reset-string)
(if (and hippie-expand-verbose
(not (window-minibuffer-p (selected-window))))
(message "Undoing expansions"))))))
;; Initializes the region to expand (to between BEG and END).
(defun he-init-string (beg end)
(set-marker he-string-beg beg)
(set-marker he-string-end end)
(setq he-search-string (buffer-substring beg end)))
;; Resets the expanded region to its original contents.
(defun he-reset-string ()
(let ((newpos (point-marker)))
(goto-char he-string-beg)
(insert he-search-string)
(delete-region (point) he-string-end)
(goto-char newpos)))
;; Substitutes an expansion STR into the correct region (the region
;; initialized with `he-init-string').
;; An optional argument TRANS-CASE means that it is ok to transfer case
;; from the abbreviation to the expansion if that is possible, and is
;; enabled in the buffer.
(defun he-substitute-string (str &optional trans-case)
(let ((trans-case (and trans-case
case-replace
case-fold-search))
(newpos (point-marker))
(subst ()))
(goto-char he-string-beg)
(setq subst (if trans-case (he-transfer-case he-search-string str) str))
(setq he-tried-table (cons subst he-tried-table))
(insert subst)
(delete-region (point) he-string-end)
(goto-char newpos)))
(defun he-capitalize-first (str)
(save-match-data
(if (string-match "\\Sw*\\(\\sw\\).*" str)
(let ((res (downcase str))
(no (match-beginning 1)))
(aset res no (upcase (aref str no)))
res)
str)))
(defun he-ordinary-case-p (str)
(or (string= str (downcase str))
(string= str (upcase str))
(string= str (capitalize str))
(string= str (he-capitalize-first str))))
(defun he-transfer-case (from-str to-str)
(cond ((string= from-str (substring to-str 0 (min (length from-str)
(length to-str))))
to-str)
((not (he-ordinary-case-p to-str))
to-str)
((string= from-str (downcase from-str))
(downcase to-str))
((string= from-str (upcase from-str))
(upcase to-str))
((string= from-str (he-capitalize-first from-str))
(he-capitalize-first to-str))
((string= from-str (capitalize from-str))
(capitalize to-str))
(t
to-str)))
;; Check if STR is a member of LST.
;; Transform to the final case if optional TRANS-CASE is non-NIL.
(defun he-string-member (str lst &optional trans-case)
(if str
(member (if (and trans-case
case-replace
case-fold-search)
(he-transfer-case he-search-string str)
str)
lst)))
;; Check if STR matches any regexp in LST.
;; Ignore possible non-strings in LST.
(defun he-regexp-member (str lst)
(while (and lst
(or (not (stringp (car lst)))
(not (string-match (car lst) str))))
(setq lst (cdr lst)))
lst)
;; For the real hippie-expand enthusiast: A macro that makes it
;; possible to use many functions like hippie-expand, but with
;; different try-functions-lists.
;; Usage is for example:
;; (fset 'my-complete-file (make-hippie-expand-function
;; '(try-complete-file-name-partially
;; try-complete-file-name)))
;; (fset 'my-complete-line (make-hippie-expand-function
;; '(try-expand-line
;; try-expand-line-all-buffers)))
;;
;;;###autoload
(defmacro make-hippie-expand-function (try-list &optional verbose)
"Construct a function similar to `hippie-expand'.
Make it use the expansion functions in TRY-LIST. An optional second
argument VERBOSE non-nil makes the function verbose."
(` (function (lambda (arg)
(, (concat
"Try to expand text before point, using the following functions: \n"
(mapconcat 'prin1-to-string (eval try-list) ", ")))
(interactive "P")
(let ((hippie-expand-try-functions-list (, try-list))
(hippie-expand-verbose (, verbose)))
(hippie-expand arg))))))
;;; Here follows the try-functions and their requisites:
(defun try-complete-file-name (old)
"Try to complete text as a file name.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(if (not old)
(progn
(he-init-string (he-file-name-beg) (point))
(let ((name-part (he-file-name-nondirectory he-search-string))
(dir-part (expand-file-name (or (he-file-name-directory
he-search-string) ""))))
(if (not (he-string-member name-part he-tried-table))
(setq he-tried-table (cons name-part he-tried-table)))
(if (and (not (equal he-search-string ""))
(he-file-directory-p dir-part))
(setq he-expand-list (sort (file-name-all-completions
name-part
dir-part)
'string-lessp))
(setq he-expand-list ())))))
(while (and he-expand-list
(he-string-member (car he-expand-list) he-tried-table))
(setq he-expand-list (cdr he-expand-list)))
(if (null he-expand-list)
(progn
(if old (he-reset-string))
())
(let ((filename (he-concat-directory-file-name
(he-file-name-directory he-search-string)
(car he-expand-list))))
(he-substitute-string filename)
(setq he-tried-table (cons (car he-expand-list) (cdr he-tried-table)))
(setq he-expand-list (cdr he-expand-list))
t)))
(defun try-complete-file-name-partially (old)
"Try to complete text as a file name, as many characters as unique.
The argument OLD has to be nil the first call of this function. It
returns t if a unique, possibly partial, completion is found, nil
otherwise."
(let ((expansion ()))
(if (not old)
(progn
(he-init-string (he-file-name-beg) (point))
(let ((name-part (he-file-name-nondirectory he-search-string))
(dir-part (expand-file-name (or (he-file-name-directory
he-search-string) ""))))
(if (and (not (equal he-search-string ""))
(he-file-directory-p dir-part))
(setq expansion (file-name-completion name-part
dir-part)))
(if (or (eq expansion t)
(string= expansion name-part)
(he-string-member expansion he-tried-table))
(setq expansion ())))))
(if (not expansion)
(progn
(if old (he-reset-string))
())
(let ((filename (he-concat-directory-file-name
(he-file-name-directory he-search-string)
expansion)))
(he-substitute-string filename)
(setq he-tried-table (cons expansion (cdr he-tried-table)))
t))))
(defvar he-file-name-chars
(cond ((memq system-type '(vax-vms axp-vms))
"-a-zA-Z0-9_/.,~^#$+=:\\[\\]")
((memq system-type '(ms-dos windows-nt))
"-a-zA-Z0-9_/.,~^#$+=:\\\\")
(t ;; More strange file formats ?
"-a-zA-Z0-9_/.,~^#$+="))
"Characters that are considered part of the file name to expand.")
(defun he-file-name-beg ()
(let ((op (point)))
(save-excursion
(skip-chars-backward he-file-name-chars)
(if (> (skip-syntax-backward "w") 0) ;; No words with non-file chars
op
(point)))))
;; Thanks go to Richard Levitte <levitte@e.kth.se> who helped to make these
;; work under VMS, and to David Hughes <ukchugd@ukpmr.cs.philips.nl> who
;; helped to make it work on PC.
(defun he-file-name-nondirectory (file)
"Fix to make `file-name-nondirectory' work for hippie-expand under VMS."
(if (memq system-type '(axp-vms vax-vms))
(let ((n (file-name-nondirectory file)))
(if (string-match "^\\(\\[.*\\)\\.\\([^\\.]*\\)$" n)
(concat "[." (substring n (match-beginning 2) (match-end 2)))
n))
(file-name-nondirectory file)))
(defun he-file-name-directory (file)
"Fix to make `file-name-directory' work for hippie-expand under VMS."
(if (memq system-type '(axp-vms vax-vms))
(let ((n (file-name-nondirectory file))
(d (file-name-directory file)))
(if (string-match "^\\(\\[.*\\)\\.\\([^\\.]*\\)$" n)
(concat d (substring n (match-beginning 1) (match-end 1)) "]")
d))
(file-name-directory file)))
(defun he-file-directory-p (file)
"Fix to make `file-directory-p' work for hippie-expand under VMS."
(if (memq system-type '(vax-vms axp-vms))
(or (file-directory-p file)
(file-directory-p (concat file "[000000]")))
(file-directory-p file)))
(defun he-concat-directory-file-name (dir-part name-part)
"Try to slam together two parts of a file specification, system dependently."
(cond ((null dir-part) name-part)
((memq system-type '(axp-vms vax-vms))
(if (and (string= (substring dir-part -1) "]")
(string= (substring name-part 0 2) "[."))
(concat (substring dir-part 0 -1) (substring name-part 1))
(concat dir-part name-part)))
((memq system-type '(ms-dos w32))
(if (and (string-match "\\\\" dir-part)
(not (string-match "/" dir-part))
(= (aref name-part (1- (length name-part))) ?/))
(aset name-part (1- (length name-part)) ?\\))
(concat dir-part name-part))
(t
(concat dir-part name-part))))
(defun try-complete-lisp-symbol (old)
"Try to complete word as an Emacs Lisp symbol.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(if (not old)
(progn
(he-init-string (he-lisp-symbol-beg) (point))
(if (not (he-string-member he-search-string he-tried-table))
(setq he-tried-table (cons he-search-string he-tried-table)))
(setq he-expand-list
(and (not (equal he-search-string ""))
(sort (all-completions he-search-string obarray
(function (lambda (sym)
(or (boundp sym)
(fboundp sym)
(symbol-plist sym)))))
'string-lessp)))))
(while (and he-expand-list
(he-string-member (car he-expand-list) he-tried-table))
(setq he-expand-list (cdr he-expand-list)))
(if (null he-expand-list)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string (car he-expand-list))
(setq he-expand-list (cdr he-expand-list))
t)))
(defun try-complete-lisp-symbol-partially (old)
"Try to complete as an Emacs Lisp symbol, as many characters as unique.
The argument OLD has to be nil the first call of this function. It
returns t if a unique, possibly partial, completion is found, nil
otherwise."
(let ((expansion ()))
(if (not old)
(progn
(he-init-string (he-lisp-symbol-beg) (point))
(if (not (string= he-search-string ""))
(setq expansion
(try-completion he-search-string obarray
(function (lambda (sym)
(or (boundp sym)
(fboundp sym)
(symbol-plist sym)))))))
(if (or (eq expansion t)
(string= expansion he-search-string)
(he-string-member expansion he-tried-table))
(setq expansion ()))))
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion)
t))))
(defun he-lisp-symbol-beg ()
(save-excursion
(skip-syntax-backward "w_")
(point)))
(defun try-expand-line (old)
"Try to complete the current line to an entire line in the buffer.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(let ((expansion ())
(strip-prompt (and (get-buffer-process (current-buffer))
comint-prompt-regexp)))
(if (not old)
(progn
(he-init-string (he-line-beg strip-prompt) (point))
(set-marker he-search-loc he-string-beg)
(setq he-search-bw t)))
(if (not (equal he-search-string ""))
(save-excursion
;; Try looking backward unless inhibited.
(if he-search-bw
(progn
(goto-char he-search-loc)
(setq expansion (he-line-search he-search-string
strip-prompt t))
(set-marker he-search-loc (point))
(if (not expansion)
(progn
(set-marker he-search-loc he-string-end)
(setq he-search-bw ())))))
(if (not expansion) ; Then look forward.
(progn
(goto-char he-search-loc)
(setq expansion (he-line-search he-search-string
strip-prompt nil))
(set-marker he-search-loc (point))))))
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
(defun try-expand-line-all-buffers (old)
"Try to complete the current line, searching all other buffers.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(let ((expansion ())
(strip-prompt (and (get-buffer-process (current-buffer))
comint-prompt-regexp))
(buf (current-buffer))
(orig-case-fold-search case-fold-search))
(if (not old)
(progn
(he-init-string (he-line-beg strip-prompt) (point))
(setq he-search-bufs (buffer-list))
(setq he-searched-n-bufs 0)
(set-marker he-search-loc 1 (car he-search-bufs))))
(if (not (equal he-search-string ""))
(while (and he-search-bufs
(not expansion)
(or (not hippie-expand-max-buffers)
(< he-searched-n-bufs hippie-expand-max-buffers)))
(set-buffer (car he-search-bufs))
(if (and (not (eq (current-buffer) buf))
(not (memq major-mode hippie-expand-ignore-buffers))
(not (he-regexp-member (buffer-name)
hippie-expand-ignore-buffers)))
(save-excursion
(goto-char he-search-loc)
(setq strip-prompt (and (get-buffer-process (current-buffer))
comint-prompt-regexp))
(setq expansion (let ((case-fold-search orig-case-fold-search))
(he-line-search he-search-string
strip-prompt nil)))
(set-marker he-search-loc (point))
(if (not expansion)
(progn
(setq he-search-bufs (cdr he-search-bufs))
(setq he-searched-n-bufs (1+ he-searched-n-bufs))
(set-marker he-search-loc 1 (car he-search-bufs)))))
(setq he-search-bufs (cdr he-search-bufs))
(set-marker he-search-loc 1 (car he-search-bufs)))))
(set-buffer buf)
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
(defun he-line-search (str strip-prompt reverse)
(let ((result ()))
(while (and (not result)
(if reverse
(re-search-backward
(he-line-search-regexp str strip-prompt)
nil t)
(re-search-forward
(he-line-search-regexp str strip-prompt)
nil t)))
(setq result (buffer-substring (match-beginning 2) (match-end 2)))
(if (he-string-member result he-tried-table t)
(setq result nil))) ; if already in table, ignore
result))
(defun he-line-beg (strip-prompt)
(save-excursion
(if (re-search-backward (he-line-search-regexp "" strip-prompt)
(save-excursion (beginning-of-line)
(point)) t)
(match-beginning 2)
(point))))
(defun he-line-search-regexp (pat strip-prompt)
(if strip-prompt
(concat "\\(" comint-prompt-regexp "\\|^\\s-*\\)\\("
(regexp-quote pat)
"[^\n]*[^ \t\n]\\)")
(concat "^\\(\\s-*\\)\\("
(regexp-quote pat)
"[^\n]*[^ \t\n]\\)")))
(defun try-expand-list (old)
"Try to complete the current beginning of a list.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(let ((expansion ()))
(if (not old)
(progn
(he-init-string (he-list-beg) (point))
(set-marker he-search-loc he-string-beg)
(setq he-search-bw t)))
(if (not (equal he-search-string ""))
(save-excursion
;; Try looking backward unless inhibited.
(if he-search-bw
(progn
(goto-char he-search-loc)
(setq expansion (he-list-search he-search-string t))
(set-marker he-search-loc (point))
(if (not expansion)
(progn
(set-marker he-search-loc he-string-end)
(setq he-search-bw ())))))
(if (not expansion) ; Then look forward.
(progn
(goto-char he-search-loc)
(setq expansion (he-list-search he-search-string nil))
(set-marker he-search-loc (point))))))
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
(defun try-expand-list-all-buffers (old)
"Try to complete the current list, searching all other buffers.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(let ((expansion ())
(buf (current-buffer))
(orig-case-fold-search case-fold-search))
(if (not old)
(progn
(he-init-string (he-list-beg) (point))
(setq he-search-bufs (buffer-list))
(setq he-searched-n-bufs 0)
(set-marker he-search-loc 1 (car he-search-bufs))))
(if (not (equal he-search-string ""))
(while (and he-search-bufs
(not expansion)
(or (not hippie-expand-max-buffers)
(< he-searched-n-bufs hippie-expand-max-buffers)))
(set-buffer (car he-search-bufs))
(if (and (not (eq (current-buffer) buf))
(not (memq major-mode hippie-expand-ignore-buffers))
(not (he-regexp-member (buffer-name)
hippie-expand-ignore-buffers)))
(save-excursion
(goto-char he-search-loc)
(setq expansion (let ((case-fold-search orig-case-fold-search))
(he-list-search he-search-string nil)))
(set-marker he-search-loc (point))
(if (not expansion)
(progn
(setq he-search-bufs (cdr he-search-bufs))
(setq he-searched-n-bufs (1+ he-searched-n-bufs))
(set-marker he-search-loc 1 (car he-search-bufs)))))
(setq he-search-bufs (cdr he-search-bufs))
(set-marker he-search-loc 1 (car he-search-bufs)))))
(set-buffer buf)
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
(defun he-list-search (str reverse)
(let ((result ())
beg pos err)
(while (and (not result)
(if reverse
(search-backward str nil t)
(search-forward str nil t)))
(setq pos (point))
(setq beg (match-beginning 0))
(goto-char beg)
(setq err ())
(condition-case ()
(forward-list 1)
(error (setq err t)))
(if (and reverse
(> (point) he-string-beg))
(setq err t))
(if (not err)
(progn
(setq result (buffer-substring beg (point)))
(if (he-string-member result he-tried-table t)
(setq result nil)))) ; if already in table, ignore
(goto-char pos))
result))
(defun he-list-beg ()
(save-excursion
(condition-case ()
(backward-up-list 1)
(error ()))
(point)))
(defun try-expand-all-abbrevs (old)
"Try to expand word before point according to all abbrev tables.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible expansions of the same
string). It returns t if a new expansion is found, nil otherwise."
(if (not old)
(progn
(he-init-string (he-dabbrev-beg) (point))
(setq he-expand-list
(and (not (equal he-search-string ""))
(mapcar (function (lambda (sym)
(if (and (boundp sym) (vectorp (eval sym)))
(abbrev-expansion (downcase he-search-string)
(eval sym)))))
(append '(local-abbrev-table
global-abbrev-table)
abbrev-table-name-list))))))
(while (and he-expand-list
(or (not (car he-expand-list))
(he-string-member (car he-expand-list) he-tried-table t)))
(setq he-expand-list (cdr he-expand-list)))
(if (null he-expand-list)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string (car he-expand-list) t)
(setq he-expand-list (cdr he-expand-list))
t)))
(defun try-expand-dabbrev (old)
"Try to expand word \"dynamically\", searching the current buffer.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible expansions of the same
string). It returns t if a new expansion is found, nil otherwise."
(let ((expansion ()))
(if (not old)
(progn
(he-init-string (he-dabbrev-beg) (point))
(set-marker he-search-loc he-string-beg)
(setq he-search-bw t)))
(if (not (equal he-search-string ""))
(save-excursion
;; Try looking backward unless inhibited.
(if he-search-bw
(progn
(goto-char he-search-loc)
(setq expansion (he-dabbrev-search he-search-string t))
(set-marker he-search-loc (point))
(if (not expansion)
(progn
(set-marker he-search-loc he-string-end)
(setq he-search-bw ())))))
(if (not expansion) ; Then look forward.
(progn
(goto-char he-search-loc)
(setq expansion (he-dabbrev-search he-search-string nil))
(set-marker he-search-loc (point))))))
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
(defun try-expand-dabbrev-all-buffers (old)
"Tries to expand word \"dynamically\", searching all other buffers.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible expansions of the same
string). It returns t if a new expansion is found, nil otherwise."
(let ((expansion ())
(buf (current-buffer))
(orig-case-fold-search case-fold-search))
(if (not old)
(progn
(he-init-string (he-dabbrev-beg) (point))
(setq he-search-bufs (buffer-list))
(setq he-searched-n-bufs 0)
(set-marker he-search-loc 1 (car he-search-bufs))))
(if (not (equal he-search-string ""))
(while (and he-search-bufs
(not expansion)
(or (not hippie-expand-max-buffers)
(< he-searched-n-bufs hippie-expand-max-buffers)))
(set-buffer (car he-search-bufs))
(if (and (not (eq (current-buffer) buf))
(not (memq major-mode hippie-expand-ignore-buffers))
(not (he-regexp-member (buffer-name)
hippie-expand-ignore-buffers)))
(save-excursion
(goto-char he-search-loc)
(setq expansion (let ((case-fold-search orig-case-fold-search))
(he-dabbrev-search he-search-string nil)))
(set-marker he-search-loc (point))
(if (not expansion)
(progn
(setq he-search-bufs (cdr he-search-bufs))
(setq he-searched-n-bufs (1+ he-searched-n-bufs))
(set-marker he-search-loc 1 (car he-search-bufs)))))
(setq he-search-bufs (cdr he-search-bufs))
(set-marker he-search-loc 1 (car he-search-bufs)))))
(set-buffer buf)
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
;; Thanks go to Jeff Dairiki <dairiki@faraday.apl.washington.edu> who
;; suggested this one.
(defun try-expand-dabbrev-visible (old)
"Try to expand word \"dynamically\", searching visible window parts.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible expansions of the same
string). It returns t if a new expansion is found, nil otherwise."
(let ((expansion ())
(buf (current-buffer))
(flag (if (frame-visible-p (window-frame (selected-window)))
'visible t)))
(if (not old)
(progn
(he-init-string (he-dabbrev-beg) (point))
(setq he-search-window (selected-window))
(set-marker he-search-loc
(window-start he-search-window)
(window-buffer he-search-window))))
(while (and (not (equal he-search-string ""))
(marker-position he-search-loc)
(not expansion))
(save-excursion
(set-buffer (marker-buffer he-search-loc))
(goto-char he-search-loc)
(setq expansion (he-dabbrev-search he-search-string ()
(window-end he-search-window)))
(if (and expansion
(eq (marker-buffer he-string-beg) (current-buffer))
(eq (marker-position he-string-beg) (match-beginning 0)))
(setq expansion (he-dabbrev-search he-search-string ()
(window-end he-search-window))))
(set-marker he-search-loc (point) (current-buffer)))
(if (not expansion)
(progn
(setq he-search-window (next-window he-search-window nil flag))
(if (eq he-search-window (selected-window))
(set-marker he-search-loc nil)
(set-marker he-search-loc (window-start he-search-window)
(window-buffer he-search-window))))))
(set-buffer buf)
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
(defun he-dabbrev-search (pattern &optional reverse limit)
(let ((result ())
(regpat (cond ((not he-dabbrev-as-symbol)
(concat "\\<" (regexp-quote pattern) "\\sw+"))
((eq (char-syntax (aref pattern 0)) ?_)
(concat (regexp-quote pattern) "\\(\\sw\\|\\s_\\)+"))
(t
(concat "\\<" (regexp-quote pattern)
"\\(\\sw\\|\\s_\\)+")))))
(while (and (not result)
(if reverse
(re-search-backward regpat limit t)
(re-search-forward regpat limit t)))
(setq result (buffer-substring (match-beginning 0) (match-end 0)))
(if (or (and he-dabbrev-as-symbol
(> (match-beginning 0) (point-min))
(memq (char-syntax (char-after (1- (match-beginning 0))))
'(?_ ?w)))
(he-string-member result he-tried-table t))
(setq result nil))) ; ignore if bad prefix or already in table
result))
(defun he-dabbrev-beg ()
(let ((op (point)))
(save-excursion
(if he-dabbrev-skip-space
(skip-syntax-backward ". "))
(if (= (skip-syntax-backward (if he-dabbrev-as-symbol "w_" "w")) 0)
op
(point)))))
(defun try-expand-dabbrev-from-kill (old)
"Try to expand word \"dynamically\", searching the kill ring.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(let ((expansion ()))
(if (not old)
(progn
(he-init-string (he-dabbrev-beg) (point))
(setq he-expand-list
(if (not (equal he-search-string ""))
kill-ring))
(setq he-search-loc2 0)))
(if (not (equal he-search-string ""))
(setq expansion (he-dabbrev-kill-search he-search-string)))
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion t)
t))))
(defun he-dabbrev-kill-search (pattern)
(let ((result ())
(regpat (cond ((not he-dabbrev-as-symbol)
(concat "\\<" (regexp-quote pattern) "\\sw+"))
((eq (char-syntax (aref pattern 0)) ?_)
(concat (regexp-quote pattern) "\\(\\sw\\|\\s_\\)+"))
(t
(concat "\\<" (regexp-quote pattern)
"\\(\\sw\\|\\s_\\)+"))))
(killstr (car he-expand-list)))
(while (and (not result)
he-expand-list)
(while (and (not result)
(string-match regpat killstr he-search-loc2))
(setq result (substring killstr (match-beginning 0) (match-end 0)))
(setq he-search-loc2 (1+ (match-beginning 0)))
(if (or (and he-dabbrev-as-symbol
(> (match-beginning 0) 0)
(memq (char-syntax (aref killstr (1- (match-beginning 0))))
'(?_ ?w)))
(he-string-member result he-tried-table t))
(setq result nil))) ; ignore if bad prefix or already in table
(if (and (not result)
he-expand-list)
(progn
(setq he-expand-list (cdr he-expand-list))
(setq killstr (car he-expand-list))
(setq he-search-loc2 0))))
result))
(defun try-expand-whole-kill (old)
"Try to complete text with something from the kill ring.
The argument OLD has to be nil the first call of this function, and t
for subsequent calls (for further possible completions of the same
string). It returns t if a new completion is found, nil otherwise."
(let ((expansion ()))
(if (not old)
(progn
(he-init-string (he-kill-beg) (point))
(if (not (he-string-member he-search-string he-tried-table))
(setq he-tried-table (cons he-search-string he-tried-table)))
(setq he-expand-list
(if (not (equal he-search-string ""))
kill-ring))
(setq he-search-loc2 ())))
(if (not (equal he-search-string ""))
(setq expansion (he-whole-kill-search he-search-string)))
(if (not expansion)
(progn
(if old (he-reset-string))
())
(progn
(he-substitute-string expansion)
t))))
(defun he-whole-kill-search (str)
(let ((case-fold-search ())
(result ())
(str (regexp-quote str))
(killstr (car he-expand-list))
(pos -1))
(while (and (not result)
he-expand-list)
(if (not he-search-loc2)
(while (setq pos (string-match str killstr (1+ pos)))
(setq he-search-loc2 (cons pos he-search-loc2))))
(while (and (not result)
he-search-loc2)
(setq pos (car he-search-loc2))
(setq he-search-loc2 (cdr he-search-loc2))
(save-excursion
(goto-char he-string-beg)
(if (and (>= (- (point) pos) (point-min)) ; avoid some string GC
(eq (char-after (- (point) pos)) (aref killstr 0))
(search-backward (substring killstr 0 pos)
(- (point) pos) t))
(setq result (substring killstr pos))))
(if (and result
(he-string-member result he-tried-table))
(setq result nil))) ; ignore if already in table
(if (and (not result)
he-expand-list)
(progn
(setq he-expand-list (cdr he-expand-list))
(setq killstr (car he-expand-list))
(setq pos -1))))
result))
(defun he-kill-beg ()
(let ((op (point)))
(save-excursion
(skip-syntax-backward "^w_")
(if (= (skip-syntax-backward "w_") 0)
op
(point)))))
(provide 'hippie-exp)
;;; hippie-exp.el ends here
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