;;; hippie-exp.el --- expand text trying various ways to find its expansion. ;; Author: Anders Holst ;; Last change: 2 September 1993 ;; Version: 1.3 ;; Keywords: abbrev ;; Copyright (C) 1992, 1993 Free Software Foundation, Inc. ;; ;; 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, 675 Mass Ave, Cambridge, MA 02139, 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-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'), and add its own tried expansions to it. ;; ;; 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-try-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. ;; ;;; Code: (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-bw ()) (defvar he-search-bufs ()) (defvar he-searched-n-bufs ()) ;;;###autoload (defvar hippie-expand-try-functions-list '(try-complete-file-name try-expand-all-abbrevs try-expand-list try-expand-line try-expand-dabbrev try-expand-dabbrev-all-buffers 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 (defvar hippie-expand-verbose t "*Non-nil makes `hippie-expand' output which function it is trying.") ;;;###autoload (defvar hippie-expand-max-buffers () "*The maximum number of buffers (apart from the current) searched. If nil, all buffers are searched.") ;;;###autoload (defvar 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)") ;;;###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 (concat "Using " (prin1-to-string (nth he-num hippie-expand-try-functions-list))))))) (if (>= he-num 0) (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))) (delete-region he-string-beg he-string-end) (goto-char he-string-beg) (insert he-search-string) (set-marker he-string-end (point)) (if (= newpos he-string-beg) (goto-char 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 (he-transfer-case-ok str he-search-string))) (newpos (point-marker))) (he-reset-string) (goto-char he-string-beg) (search-forward he-search-string) (replace-match (if trans-case (downcase str) str) (not trans-case) 'literal) (set-marker he-string-end (point)) (if (= newpos he-string-beg) (goto-char he-string-end) (goto-char newpos)))) (defun he-ordinary-case-p (str) (or (string= str (downcase str)) (string= str (upcase str)) (string= str (capitalize str)))) (defun he-transfer-case-ok (to-str from-str) (and (not (string= from-str (substring to-str 0 (min (length from-str) (length to-str))))) ;; otherwise transfer is not needed (and this also solves ;; some obscure situations) (he-ordinary-case-p to-str) ;; otherwise case may be significant (he-ordinary-case-p from-str) ;; otherwise replace-match wont know what to do )) ;; Check if STR is a member of LST. ;; Ignore case if `case-replace' and `case-fold-search' are both t. (defun he-string-member (str lst) (while (and lst (not (if (and case-fold-search case-replace) (string= (downcase (car lst)) (downcase str)) (string= (car lst) str)))) (setq lst (cdr lst))) 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 (file-name-nondirectory he-search-string)) (dir-part (expand-file-name (or (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 "")) (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 (concat (file-name-directory he-search-string) (car he-expand-list)))) (he-substitute-string filename) (setq he-tried-table (cons (car he-expand-list) 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 (file-name-nondirectory he-search-string)) (dir-part (expand-file-name (or (file-name-directory he-search-string) "")))) (if (and (not (equal he-search-string "")) (file-directory-p dir-part)) (setq expansion (file-name-completion name-part dir-part))) (if (or (eq expansion t) (string= expansion name-part)) (setq expansion ()))))) (if (not expansion) (progn (if old (he-reset-string)) ()) (let ((filename (concat (file-name-directory he-search-string) expansion))) (he-substitute-string filename) (setq he-tried-table (cons expansion he-tried-table)) t)))) (defun he-file-name-beg () (let ((skips "-a-zA-Z0-9_./~^#$")) (save-excursion (skip-chars-backward skips) (point)))) (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-tried-table (cons (car he-expand-list) he-tried-table)) (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)) (setq expansion ())))) (if (not expansion) (progn (if old (he-reset-string)) ()) (progn (he-substitute-string expansion) (setq he-tried-table (cons expansion he-tried-table)) t)))) (defun he-lisp-symbol-beg () (let ((skips "-a-zA-Z0-9_.")) (save-excursion (skip-chars-backward skips) (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) (setq he-tried-table (cons expansion he-tried-table)) 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))) (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 (he-line-search he-search-string strip-prompt nil)) (set-marker he-search-loc (point)) (if expansion (setq he-tried-table (cons expansion he-tried-table)) (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) (setq result nil))) ; if already in table, ignore result)) (defun he-line-beg (strip-prompt) (save-excursion (end-of-line) (if (re-search-backward (he-line-search-regexp "" strip-prompt) (save-excursion (beginning-of-line) (point)) t) (match-beginning 2) (beginning-of-line) (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) (setq he-tried-table (cons expansion he-tried-table)) 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))) (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 (he-list-search he-search-string nil)) (set-marker he-search-loc (point)) (if expansion (setq he-tried-table (cons expansion he-tried-table)) (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) (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) (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))) (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-tried-table (cons (car he-expand-list) he-tried-table)) (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-dab-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-dab-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) (setq he-tried-table (cons expansion he-tried-table)) 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))) (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 (he-dab-search he-search-string nil)) (set-marker he-search-loc (point)) (if expansion (setq he-tried-table (cons expansion he-tried-table)) (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-dab-search-regexp (pat) (concat "\\<" (regexp-quote pat) "\\(\\sw\\|\\s_\\)+")) (defun he-dab-search (pattern reverse) (let ((result ())) (while (and (not result) (if reverse (re-search-backward (he-dab-search-regexp pattern) nil t) (re-search-forward (he-dab-search-regexp pattern) nil t))) (setq result (buffer-substring (match-beginning 0) (match-end 0))) (if (he-string-member result he-tried-table) (setq result nil))) ; if already in table, ignore result)) (defun he-dabbrev-beg () (min (point) (save-excursion (skip-syntax-backward "w_") (skip-syntax-forward "_") (point)))) (provide 'hippie-exp) ;;; hippie-exp.el ends here