From 213d9a4f6ef51145a7898e5bfd87fde7332ecb11 Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Sun, 12 Nov 1995 23:58:04 +0000 Subject: [PATCH] Initial revision --- lisp/ffap.el | 1500 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1500 insertions(+) create mode 100644 lisp/ffap.el diff --git a/lisp/ffap.el b/lisp/ffap.el new file mode 100644 index 00000000000..df21a0dc887 --- /dev/null +++ b/lisp/ffap.el @@ -0,0 +1,1500 @@ +;;; ffap.el -- find-file-at-point, +;; Copyright (C) 1994, 1995 Free Software Foundation, Inc. + +;;; Author: Michelangelo Grigni + +;; 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: + +;; A replacement for find-file {C-x C-f}: finds file or URL, +;; guessing default from text at point. Many features! +;; Send bugs or suggestions with M-x ffap-bug. + +;; See ftp://ftp.mathcs.emory.edu:/pub/mic/emacs/ for most recent version: +;; ffap.el.gz -- this file, compressed with gzip +;; ffap-xe.el -- support code for XEmacs 19.* +;; COPYING.gz -- GNU General Public License, version 2 +;; README -- description of these and other files +;; +;; For the last version sent to elisp-archive@cis.ohio-state.edu, see: +;; ftp://ftp.cis.ohio-state.edu/pub/gnu/emacs/elisp-archive/misc/ffap.el.Z +;; (mirrored in gatekeeper.dec.com:/pub/GNU/elisp-archive/misc/) + +;;; Description: +;; +;; Command find-file-at-point (== ffap) replaces find-file. With a +;; prefix, it behaves exactly like find-file. Without a prefix, it +;; first tries to guess a default file or URL based on the text around +;; the point (set `ffap-require-prefix' to swap these behaviors). +;; This is a quick way to fetch URL and file references in many +;; situations, such as in mail or news messages, README's, and +;; MANIFEST's. +;; +;; Some related commands are ffap-at-mouse, ffap-next, ffap-menu, +;; ffap-other-window, ffap-other-frame. +;; +;; This package is about user convenience. It adds nothing to the +;; elisp programmer's repertoire. + + +;;; Installation: + +;; Quick Setup: +;; +;; For a basic installation, just install ffap.el somewhere in your +;; `load-path', byte-compile it, and add the following two lines near +;; the end of your ~/.emacs (or equivalent) file: +;; +;; (require 'ffap) ; load this file +;; (global-set-key "\C-x\C-f" 'find-file-at-point) +;; +;; Other Packages: ffap notices the presence of several other packages +;; when it is loaded. In particular, if you use ange-ftp, efs, w3, +;; complete, or ff-paths (version < 3.00), it is best to load or +;; autoload them before loading ffap (ffap does not need any of them). +;; If you use ff-paths version >= 3.00, load it after ffap. + +;; Fancier Setup: +;; +;; ffap has many options. The next comment block contains some +;; fancier code that you might want to adapt for your .emacs. For +;; even more features, look at the documentation (M-x apropos ffap), +;; and perhaps check the comments in the "User Variables" and "Peanut +;; Gallery" sections of this file. + +;; ;; Before loading ffap: +;; +;; (setq ffap-url-regexp nil) ; to disable all URL features +;; +;; ;; Loading ffap: +;; (require 'ffap) ; as in "Quick Setup" above +;; +;; After loading ffap: +;; +;; (global-set-key "\C-x\C-f" 'find-file-at-point) ; as in "Quick Setup" +;; (global-set-key "\C-x4f" 'ffap-other-window) ; or \C-f +;; (global-set-key "\C-x5f" 'ffap-other-frame) ; or \C-f +;; +;; (setq ffap-alist ; remove something in `ffap-alist' +;; (delete (assoc 'c-mode ffap-alist) ffap-alist)) +;; +;; (setq ffap-alist ; add something to `ffap-alist' +;; (cons +;; (cons "^[Yy][Ss][Nn][0-9]+$" +;; (defun ffap-ysn (name) +;; (concat +;; "http://snorri.chem.washington.edu/ysnarchive/issuefiles/" +;; (substring name 3) ".html"))) +;; ffap-alist)) +;; +;; +;; Before or after loading ffap: +;; +;; (setq ffap-alist nil) ; disable all `ffap-alist' actions +;; +;; (setq ffap-require-prefix t) ; without prefix, ffap == find-file +;; +;; (setq ffap-machine-p-known 'accept) ; to avoid pinging +;; +;; ;; Choose a mouse binding appropriate for your emacs version: +;; (global-set-key [S-mouse-1] 'ffap-at-mouse) ; Emacs 19 +;; (global-set-key [(meta button1)] 'ffap-at-mouse) ; XEmacs +;; (and window-system ; Emacs 18 (from .emacs) +;; (setq window-setup-hook +;; '(lambda nil (define-key mouse-map x-button-s-left +;; 'ffap-at-mouse)))) +;; +;; ;; Use Netscape instead of w3 to fetch URL's. Mosaic is very similar. +;; (if (eq window-system 'x) +;; (progn +;; ;; Get browse-url at http://wombat.doc.ic.ac.uk/emacs/browse-url.el, +;; ;; or get a (probably out of date) copy from the ftp site above. +;; (autoload 'browse-url-netscape "browse-url" nil t) +;; (setq ffap-url-fetcher 'browse-url-netscape))) +;; ;; Or for a hairier ffap-url-fetcher, get ffap-url.el (same ftp site). +;; +;; ;; Support for gnus, vm, rmail (see hook definitions for bindings): +;; (add-hook 'gnus-summary-mode-hook 'ffap-gnus-hook) +;; (add-hook 'gnus-article-mode-hook 'ffap-gnus-hook) +;; (add-hook 'vm-mode-hook 'ffap-ro-mode-hook) +;; (add-hook 'rmail-mode-hook 'ffap-ro-mode-hook) + + +;;; Related packages: +;; +;; If you have hyperbole, you may not need this package, although ffap +;; is smaller and smarter at this particular task. Also note that w3 +;; (ftp.cs.indiana.edu:/pub/elisp/w3/README) offers a similar command +;; w3-follow-url-at-point. +;; +;; The browse-url package (above) notices URL's and hands them off to +;; w3 or an external WWW browser. Package |~/misc/goto-address.el.gz| +;; by Eric J. Ding notices URL's and mail +;; addresses, and can pre-fontify a buffer to highlight them. Gnus5 +;; (ding) and vm also provide similar support in their messages. + + +;;; Examples: +;; +;; Try M-x find-file-at-point (maybe {C-x C-f}) on these examples. +;; These local file examples use ordinary find-file: +;; +;; ffap.el, /etc/motd, $MAIL -- find local or absolute files +;; .emacs book.sty info/cl pwd.h -- search paths depending on filename +;; (require 'rmail) -- search paths depending on major-mode +;; file:/etc/motd -- depends on `ffap-url-unwrap-local' +;; +;; These remote file examples work if you have ange-ftp or efs: +;; +;; ftp:/pub -- no ping (always works) +;; ftp.x.org:README -- no ping, a nice recursive example +;; anonymous@ftp.x.org:/README -- synonym +;; ftp.x.org://README -- synonym +;; ftp://ftp.x.org/README -- depends on `ffap-url-unwrap-remote' +;; ftp.mathcs.emory.edu -- depends on `ffap-machine-p-known' +;; mic@ftp:/ -- depends on `ffap-machine-p-local' +;; ftp.mathcs.emory.edu:/ -- depends on `ffap-ftp-sans-slash-regexp' +;; +;; These URL examples use `ffap-url-fetcher' (default w3-fetch): +;; +;; http://www.cc.emory.edu +;; http://www.cs.indiana.edu/elisp/w3/docs.html +;; http://info.cern.ch/default.html +;; news:news.newusers.questions +;; mailto:mic@mathcs.emory.edu +;; mic@mathcs.emory.edu -- same as previous +;; -- same as previous +;; -- mailto:root +;; -- see `ffap-foo@bar-prefix' +;; file:/etc/motd -- see `ffap-url-unwrap-local' +;; ftp://ftp.x.org/README -- see `ffap-url-unwrap-remote' +;; +;; Multiline gopher blocks (as in .gopherrc and usenet of yesteryear): +;; +;; Type=1 +;; Name=Electronic Texts (ffap ignores this) +;; Path= +;; Host=etext.archive.umich.edu +;; Port=70 + + +;;; Code: + +(provide 'ffap) + +;;; User Variables: + +;; This function is used inside defvars: +(defun ffap-soft-value (name &optional default) + ;; Avoid interning. Bug: (ffap-soft-value "nil" 5) --> 5 + (let ((sym (intern-soft name))) + (if (and sym (boundp sym)) (symbol-value sym) default))) + + +(defvar ffap-ftp-regexp + (and + (or (featurep 'ange-ftp) + (featurep 'efs) + (and (boundp 'file-name-handler-alist) ; v19 + (or (rassq 'ange-ftp-hook-function file-name-handler-alist) + (rassq 'efs-file-handler-function file-name-handler-alist)))) + ;; Apparently this is good enough for both ange-ftp and efs: + "\\`/[^/:]+:") + "*Treat paths matching this as remote ftp paths. Nil to disable. +Nil also disables the generation of such paths by ffap.") + +(defvar ffap-url-unwrap-local t + "*If set, convert local \"file:\" URL to path before prompting.") + +(defvar ffap-url-unwrap-remote t + "*Convert remote \"file:\" or \"ftp:\" URL to path before prompting. +This is ignored if `ffap-ftp-regexp' is nil.") + +(defvar ffap-ftp-default-user + (if (or (equal (ffap-soft-value "ange-ftp-default-user") "anonymous") + (equal (ffap-soft-value "efs-default-user") "anonymous")) + nil + "anonymous") + "*User name in ftp paths generated by ffap (see host-to-ftp-path). +Nil to fall back on `efs-default-user' or `ange-ftp-default-user'.") + +(defvar ffap-rfs-regexp + ;; Remote file access built into file system? HP rfa or Andrew afs: + "\\`/\\(afs\\|net\\)/." + ;; afs only: (and (file-exists-p "/afs") "\\`/afs/.") + "*Paths matching this are remote file-system paths. Nil to disable.") + +(defvar ffap-url-regexp + ;; Could just use `url-nonrelative-link' of w3, if loaded. + ;; This regexp is not exhaustive, it just matches common cases. + (concat + "\\`\\(" + "news\\(post\\)?:\\|mailto:\\|file:" ; no host ok + "\\|" + "\\(ftp\\|http\\|telnet\\|gopher\\|www\\|wais\\)://" ; needs host + "\\)." ; require one more character + ) + "Regexp matching URL's, or nil to disable.") + +(defvar ffap-foo@bar-prefix "mailto" + "*Presumed url prefix type of strings like \"\". +Sensible values are nil, \"news\", or \"mailto\".") + + +;;; Peanut Gallery: + +;; Users of ffap occasionally suggest new features. If I consider +;; those features interesting but not clear winners (a matter of +;; personal taste) I try to leave options to enable them. Read +;; through this section, and for any features you like, put an +;; appropriate form in your ~/.emacs file. + +(defvar ffap-dired-wildcards nil ; "[*?][^/]*$" + ;; From RHOGEE, 07 Jul 1994. + ;; Disabled: dired is still available by "C-x C-d ", and + ;; valid filenames may contain wildcard characters. + "*A regexp matching filename wildcard characters, or nil. +If find-file-at-point gets a filename matching this pattern, +it passes it on to dired instead of find-file.") + +(defvar ffap-newfile-prompt nil ; t + ;; From RHOGEE, 11 Jul 1994. + ;; Disabled: this is better handled by `find-file-not-found-hooks'. + "*Whether find-file-at-point prompts about a nonexistent file.") + +(defvar ffap-require-prefix nil + ;; From RHOGEE, 20 Oct 1994. + ;; This is nil so that neophytes notice ffap. Experts instead may + ;; prefer to disable ffap most of the time. + "*If set, reverses the prefix argument to find-file-at-point.") + +(defvar ffap-file-finder + ;; From RHOGEE, 20 Oct 1994. + ;; This allows compatibility with ff-paths version < 3.00. + ;; For ff-paths version >= 3.00, just load it after ffap. + (if (commandp 'find-file-using-paths) + 'find-file-using-paths + ;; Try to overcome load-order dependency: + (eval-after-load + "ff-paths" + '(and (commandp 'find-file-using-paths) + (setq ffap-file-finder find-file-using-paths))) + 'find-file) + "*The command symbol called by find-file-at-point to find a file. +Probably find-file, or find-file-using-paths if you use ff-paths +with version < 3.00.") +(put 'ffap-file-finder 'risky-local-variable t) + +(defvar ffap-url-fetcher 'w3-fetch + "*A function of one argument, called by ffap to fetch URL's. +The default is w3-fetch from the w3 package. If you prefer Mosaic or +Netscape, install http://wombat.doc.ic.ac.uk/emacs/browse-url.el, and +add one of the following lines to your setup: + +\(setq ffap-url-fetcher 'browse-url-netscape\) +\(setq ffap-url-fetcher 'browse-url-mosaic\) + +Or for something hairier \(choose fetch method based on url type and +prompting\) get ffap-url.el wherever you ffap.el." + ;; Big old `lambda' examples deleted. Some remote-control references: + ;; http://www.ncsa.uiuc.edu/SDG/Software/XMosaic/remote-control.html + ;; http://home.netscape.com/newsref/std/x-remote.html + ) +(put 'ffap-url-fetcher 'risky-local-variable t) + + +;;; Command ffap-next: +;; +;; Original ffap-next-url (URL's only) from RPECK 30 Mar 1995. +;; Since then, broke up into ffap-next-guess (noninteractive) and +;; ffap-next (a command), now work on files as well as url's. + +(defvar ffap-next-regexp + ;; If you want ffap-next to find URL's only, try this: + ;; (and ffap-url-regexp (string-match "\\\\`" ffap-url-regexp) + ;; (concat "\\<" (substring ffap-url-regexp 2)))) + ;; + ;; It pays to put a big fancy regexp here, since ffap-guesser is + ;; much more time-consuming than regexp searching: + "[/:.~a-zA-Z]/\\|@[a-zA-Z][-a-zA-Z0-9]*\\." + "*Regular expression governing search of ffap-next.") + +(defvar ffap-next-guess nil "Last value returned by `ffap-next-guess'.") +(defun ffap-next-guess (&optional back lim) + "Move point to next file or url, and return it as a string. +If nothing found, leaves point at limit and returns nil. +Optional BACK argument makes search backwards. +Optional LIM argument limits the search. +Only considers strings that match `ffap-next-regexp'." + (or lim (setq lim (if back (point-min) (point-max)))) + (let (guess) + (while (not (or guess (eq (point) lim))) + (funcall (if back 're-search-backward 're-search-forward) + ffap-next-regexp lim 'move) + (setq guess (ffap-guesser))) + ;; Go to end, so we do not get same guess twice: + (goto-char (nth (if back 0 1) ffap-string-at-point-region)) + (setq ffap-next-guess guess))) + +;;;###autoload +(defun ffap-next (&optional back wrap) + "Search buffer for next file or url, and run ffap. +Optional argument BACK says to search backwards. +Optional argument WRAP says to try wrapping around if necessary. +Interactively: use a single prefix to search backwards, +double prefix to wrap forward, triple to wrap backwards. +Actual search is done by ffap-next-guess." + (interactive + (cdr (assq (prefix-numeric-value current-prefix-arg) + '((1) (4 t) (16 nil t) (64 t t))))) + (let ((pt (point)) + (guess (ffap-next-guess back))) + ;; Try wraparound if necessary: + (and (not guess) wrap + (goto-char (if back (point-max) (point-min))) + (setq guess (ffap-next-guess back pt))) + (if guess + (progn + (sit-for 0) ; display point movement + (find-file-at-point (ffap-prompter guess))) + (goto-char pt) ; restore point + (message "No %sfiles or URL's found." + (if wrap "" "more "))))) + +(defun ffap-next-url (&optional back wrap) + "Just like ffap-next, but searches with `ffap-url-regexp'." + (interactive) + (let ((ffap-next-regexp ffap-url-regexp)) + (if (interactive-p) + (call-interactively 'ffap-next) + (ffap-next back wrap)))) + + +;;; Hooks for GNUS, VM, Rmail: +;; +;; See "Installation" above for suggested use of these hooks. +;; If you do not like these bindings, just write hooks with +;; whatever bindings you would prefer. +;; +;; Any suggestions of more "memorable" bindings? -- Mic + +(defun ffap-ro-mode-hook nil + "Binds ffap-gnus-next and ffap-gnus-menu to M-l and M-m, resp." + (local-set-key "\M-l" 'ffap-next) + (local-set-key "\M-m" 'ffap-menu) + ) + +(defun ffap-gnus-hook nil + "Binds ffap-gnus-next and ffap-gnus-menu to L and M, resp." + (set (make-local-variable 'ffap-foo@bar-prefix) "news") ; message-id's + ;; Note lowercase l and m are taken: + (local-set-key "L" 'ffap-gnus-next) + (local-set-key "M" 'ffap-gnus-menu)) + +(defun ffap-gnus-wrapper (form) ; used by both commands below + (and (eq (current-buffer) (get-buffer gnus-summary-buffer)) + (gnus-summary-select-article)) ; get article of current line + ;; Preserve selected buffer, but do not do save-window-excursion, + ;; since we want to see any window created by form. Temporarily + ;; select the article buffer, so we see any point movement. + (let ((sb (window-buffer (selected-window)))) + (gnus-configure-windows 'article) + (pop-to-buffer gnus-article-buffer) + (widen) + ;; Skip headers at first, for ffap-gnus-next (which wraps around) + (if (eq (point) (point-min)) (search-forward "\n\n" nil t)) + (unwind-protect + (eval form) + (pop-to-buffer sb)))) + +(defun ffap-gnus-next nil + "Run ffap-next in the GNUS article buffer." + (interactive) (ffap-gnus-wrapper '(ffap-next nil t))) + +(defun ffap-gnus-menu nil + "Run ffap-menu in the GNUS article buffer." + (interactive) (ffap-gnus-wrapper '(ffap-menu))) + + +;;; Remote machines and paths: + +(fset 'ffap-replace-path-component + (if (or (featurep 'efs) + (and + (boundp 'file-name-handler-alist) ; v19 + (rassq 'efs-file-handler-function file-name-handler-alist))) + 'efs-replace-path-component + 'ange-ftp-replace-name-component)) + +(defun ffap-file-exists-string (file) + ;; With certain packages (ange-ftp, jka-compr?) file-exists-p + ;; sometimes returns a nicer string than it is given. Otherwise, it + ;; just returns nil or t. + "Return FILE \(maybe modified\) if it exists, else nil." + (let ((exists (file-exists-p file))) + (and exists (if (stringp exists) exists file)))) + +;; I cannot decide a "best" strategy here, so these are variables. In +;; particular, if `Pinging...' is broken or takes too long on your +;; machine, try setting these all to accept or reject. +(defvar ffap-machine-p-local 'reject ; this happens often + "A symbol, one of: ping, accept, reject. +This is what ffap-machine-p does with hostnames that have no domain.") +(defvar ffap-machine-p-known 'ping ; 'accept for speed + "A symbol, one of: ping, accept, reject. +This is what ffap-machine-p does with hostnames that have a known domain +\(see lisp/mail-extr.el for the list of known domains\).") +(defvar ffap-machine-p-unknown 'reject + "A symbol, one of: ping, accept, reject. +This is what ffap-machine-p does with hostnames that have an unknown domain +\(see lisp/mail-extr.el for the list of known domains\).") + +(defvar ffap-machine-p-known-domains + '("com" "edu" "net" "org" "mil" "gov" "us" "arpa") ; USA USA... + ;; This variable is mainly for emacs18. + "Top-level domains known to ffap. Ignored if mail-extr is loadable.") + +(defun ffap-machine-p (host &optional service quiet) + "Indicate whether HOST is the name of a real machine. +The variables ffap-machine-p-local, ffap-machine-p-known, and ffap-machine-p-unknown +control ffap-machine-p depending on HOST's domain \(none/known/unknown\). +Pinging is done using open-network-stream to decide HOST existence. +Optional SERVICE specifies the service used \(default \"discard\"\). +Optional QUIET flag suppresses the \"Pinging...\" message. +Returned values: +A t value means that HOST answered. +A symbol \(accept\) means the relevant variable told us to accept. +A string means the machine exists, but does not respond for some reason." + ;; Try some: + ;; (ffap-machine-p "ftp") + ;; (ffap-machine-p "nonesuch") + ;; (ffap-machine-p "ftp.mathcs.emory.edu") + ;; (ffap-machine-p "foo.bonk") + ;; (ffap-machine-p "foo.bonk.com") + ;; (ffap-machine-p "cs" 5678) + ;; (ffap-machine-p "gopher.house.gov") + ;; Not known to 19.28 + ;; (ffap- + (if (or (string-match "[^-a-zA-Z0-9.]" host) ; Illegal chars (?) + (not (string-match "[^0-9]" host))) ; all numeric! reject it + nil + (let* ((domain + (and (string-match "\\.[^.]*$" host) + (downcase (substring host (1+ (match-beginning 0)))))) + (domain-name ; t, "Country", "Local", or nil + (cond + ((not domain) "Local") + ;; common non-country domains (some imply US though): + ;; t) + (t + ;; Use domain-name properties from v19 lisp/mail-extr.el; + ;; bbdb/mail-extr also puts this in `all-top-level-domains'. + (if (or (featurep 'mail-extr) + (and (load "mail-extr" t t) + ;; It became a feature between 19.22 and 19.28 + (provide 'mail-extr))) + (get (intern-soft + domain + (condition-case nil + mail-extr-all-top-level-domains + ;; Before 19.28, the symbols were in `obarray': + (error obarray))) + 'domain-name) + ;; Emacs18 does not have mail-extr: + (and (member domain ffap-machine-p-known-domains) t)) + ))) + (strategy + (cond ((not domain) ffap-machine-p-local) + ((not domain-name) ffap-machine-p-unknown) + (ffap-machine-p-known)))) + (cond + ((eq strategy 'accept) 'accept) + ((eq strategy 'reject) nil) + ;; assume (eq strategy 'ping) + (t + (or quiet + (if (stringp domain-name) + (message "Pinging %s (%s)..." host domain-name) + (message "Pinging %s ..." host))) + (condition-case error + (progn + (delete-process + (open-network-stream + "ffap-machine-p" nil host (or service "discard"))) + t) + (error + (let ((mesg (car (cdr error)))) + (cond + ;; v18: + ((string-match "^Unknown host" mesg) nil) + ((string-match "not responding$" mesg) mesg) + ;; v19: + ;; (file-error "connection failed" "permission denied" + ;; "nonesuch" "ffap-machine-p") + ;; (file-error "connection failed" "host is unreachable" + ;; "gopher.house.gov" "ffap-machine-p") + ;; (file-error "connection failed" "address already in use" + ;; "ftp.uu.net" "ffap-machine-p") + ((equal mesg "connection failed") + (if (equal (nth 2 error) "permission denied") + nil ; host does not exist + ;; Other errors mean host exists: + (nth 2 error))) + ;; Could be "Unknown service": + (t (signal (car error) (cdr error)))))))))))) + +(defun ffap-file-remote-p (filename) + "If FILENAME looks remote, return it \(maybe slightly improved\)." + ;; (ffap-file-remote-p "/user@foo.bar.com:/pub") + ;; (ffap-file-remote-p "/foo.dom://path") + (or (and ffap-ftp-regexp + (string-match ffap-ftp-regexp filename) + ;; Convert "/host://path" to "/host:/path", to handle a dieing + ;; practice of advertising ftp paths as "host.dom://path". + (if (string-match "//" filename) + (concat (substring filename 0 (match-beginning 0)) + (substring filename (1- (match-end 0)))) + filename)) + (and ffap-rfs-regexp + (string-match ffap-rfs-regexp filename) + filename))) + +(defun ffap-machine-at-point nil + "Return machine name from around point if it exists, or nil." + (let ((mach (ffap-string-at-point "-a-zA-Z0-9." nil "."))) + (and (ffap-machine-p mach) mach))) + +(defun ffap-fixup-machine (mach) + ;; Convert a machine into an URL, an ftp path, or nil. + (cond + ((not (and ffap-url-regexp (stringp mach))) nil) + ((string-match "\\`gopher[-.]" mach) ; or "info"? + (concat "gopher://" mach "/")) + ((and (string-match "\\`w\\(ww\\|eb\\)[-.]" mach)) + (concat "http://" mach "/")) + ;; More cases? Maybe "telnet:" for archie? + (ffap-ftp-regexp (ffap-host-to-path mach)) + )) + +(defun ffap-host-to-path (host) + "Convert \"HOST\" to \"/anonymous@HOST:\" (or \"\" for \"localhost\"). +Variable `ffap-ftp-default-user' overrides or suppresses \"anonymous\"." + (if (equal host "localhost") + "" + (if ffap-ftp-default-user + (concat "/" ffap-ftp-default-user "@" host ":") + (concat "/" host ":")))) + +(defun ffap-newsgroup-p (string) + "Return STRING if it looks like a newsgroup name, else nil." + (and + (string-match ffap-newsgroup-regexp string) + (let ((htbs '(gnus-active-hashtb gnus-newsrc-hashtb gnus-killed-hashtb)) + (heads ffap-newsgroup-heads) + htb ret) + (while htbs + (setq htb (car htbs) htbs (cdr htbs)) + (condition-case nil + (progn + ;; errs: htb symbol may be unbound, or not a hash-table. + ;; gnus-gethash is just a macro for intern-soft. + (and (intern-soft string (symbol-value htb)) + (setq ret string htbs nil)) + ;; If we made it this far, GNUS is running, so ignore "heads": + (setq heads nil)) + (error nil))) + (or ret (not heads) + (let ((head (string-match "\\`\\([a-z]+\\)\\." string))) + (and head (setq head (substring string 0 (match-end 1))) + (member head heads) + (setq ret string)))) + ;; Ever any need to modify string as a newsgroup name? + ret))) +(defvar ffap-newsgroup-regexp "^[a-z]+\\.[-+a-z_0-9.]+$" + "ffap-newsgroup-p quickly rejects strings that do not match this.") +(defvar ffap-newsgroup-heads ; entirely inadequate + '("alt" "comp" "gnu" "misc" "news" "sci" "soc" "talk") + "Used by ffap-newsgroup-p if GNUS is not running.") + +(defun ffap-url-p (string) + "If STRING looks like an URL, return it (maybe improved), else nil." + ;; Does it look like an URL? Ignore case. + (let ((case-fold-search t)) + (and ffap-url-regexp (string-match ffap-url-regexp string) + ;; I lied, no improvement: + string))) + +;; Broke these two out of ffap-fixup-url, for sake of ffap-url package. +(defun ffap-url-unwrap-local (url) + "Return unwrapped local file URL, or nil. Ignores ffap-* variables." + (and (string-match "\\`\\(file\\|ftp\\):/?\\([^/]\\|\\'\\)" url) + (substring url (1+ (match-end 1))))) +(defun ffap-url-unwrap-remote (url) + "Return unwrapped remote file URL, or nil. Ignores ffap-* variables." + (and (string-match "\\`\\(ftp\\|file\\)://\\([^:/]+\\):?\\(/.*\\)" url) + (concat + (ffap-host-to-path (substring url (match-beginning 2) (match-end 2))) + (substring url (match-beginning 3) (match-end 3))))) + +(defun ffap-fixup-url (url) + "Given URL, clean it up and return it. May become a file name." + (cond + ((not (stringp url)) nil) + ((and ffap-url-unwrap-local (ffap-url-unwrap-local url))) + ((and ffap-url-unwrap-remote ffap-ftp-regexp + (ffap-url-unwrap-remote url))) + ;; Do not load w3 just for this: + (t (let ((normal (and (fboundp 'url-normalize-url) + (url-normalize-url url)))) + ;; In case url-normalize-url is confused: + (or (and normal (not (zerop (length normal))) normal) + url))))) + + +;;; `ffap-alist': +;; +;; Search actions depending on the major-mode or extensions of the +;; current name. Note all the little defun's could be broken out, at +;; some loss of locality. I have had a vote for eliminating this +;; from ffap (featuritis) + +;; First, some helpers for functions in `ffap-alist': + +(defun ffap-list-env (env &optional empty) + ;; Replace this with parse-colon-path (lisp/files.el)? + "Directory list parsed from \":\"-separated ENVinronment variable. +Optional EMPTY is default if (getenv ENV) is undefined, and is also +substituted for the first empty-string component, if there is one." + ;; Derived from psg-list-env in RHOGEE's ff-paths and + ;; bib-cite packages. The `empty' argument is intended to mimic + ;; the semantics of TeX/BibTeX variables, it is substituted for + ;; any empty string entry. + (if (or empty (getenv env)) ; should return something + (let ((start 0) match dir ret) + (setq env (concat (getenv env) ":")) ; note undefined --> ":" + (while (setq match (string-match ":" env start)) + (setq dir (substring env start match) start (1+ match)) + ;;(and (file-directory-p dir) (not (member dir ret)) ...) + (setq ret (cons dir ret))) + (setq ret (nreverse ret)) + (and empty (setq match (member "" ret)) + (progn + (setcdr match (append (cdr-safe empty) (cdr match))) + (setcar match (or (car-safe empty) empty)))) + ret))) + +(defun ffap-reduce-path (path) + "Remove duplicates or non-dirs from PATH." + (let (ret tem) + (while path + (setq tem path path (cdr path)) + (or (member (car tem) ret) + (not (file-directory-p (car tem))) + (progn (setcdr tem ret) (setq ret tem)))) + (nreverse ret))) + +(defun ffap-add-subdirs (path) + "Return PATH augmented with its immediate subdirectories." + ;; (ffap-add-subdirs '("/notexist" "~")) + (let (ret subs) + (while path + (mapcar + (function + (lambda (f) (and (file-directory-p f) (setq ret (cons f ret))))) + (condition-case nil + (directory-files (car path) t "[^.]") + (error nil))) + (setq ret (cons (car path) ret) + path (cdr path))) + (nreverse ret))) + +(defvar ffap-locate-jka-suffixes t + "List of compression suffixes that ffap-locate-file tries. +If not a list, it will be initialized by ffap-locate-file, +and it will become nil unless you are using jka-compr. +You might set this to nil or a list like '(\".gz\" \".z\" \".Z\").") + +(defun ffap-locate-file (file &optional nosuffix path) + ;; If this package is only working in v19 now, maybe should + ;; replace this with a quiet version of locate-library. + "A generic path-searching function, defaults mimic `load' behavior. +Returns path of an existing FILE that (load FILE) would load, or nil. +Optional second argument NOSUFFIX, if t, is like the fourth argument +for load, i.e. don't try adding suffixes \".elc\" and \".el\". +If a list, it is taken as a list of suffixes to try instead. +Optional third argument PATH specifies a different search path, it +defaults to `load-path'." + (or path (setq path load-path)) + (if (file-name-absolute-p file) + (setq path (list (file-name-directory file)) + file (file-name-nondirectory file))) + (let ((suffixes-to-try + (cond + ((consp nosuffix) nosuffix) + (nosuffix '("")) + (t '(".elc" ".el" ""))))) + ;; Compensate for modern (19.28) jka-compr, that no longer searches + ;; for foo.gz when you asked for foo: + (or (listp ffap-locate-jka-suffixes) + (setq ffap-locate-jka-suffixes + (and (featurep 'jka-compr) ; an early version was jka-compr19 + (not (featurep 'jka-aux)) + jka-compr-file-name-handler-entry + (not (string-match + (car jka-compr-file-name-handler-entry) + "foo")) + ;; Hard to do cleverly across various jka-compr versions: + '(".gz" ".Z")))) + (if ffap-locate-jka-suffixes + (setq suffixes-to-try + (apply + 'nconc + (mapcar + (function + (lambda (suf) + (cons suf + (mapcar + (function (lambda (x) (concat suf x))) + ffap-locate-jka-suffixes)))) + suffixes-to-try)))) + (let (found suffixes) + (while (and path (not found)) + (setq suffixes suffixes-to-try) + (while (and suffixes (not found)) + (let ((try (expand-file-name + (concat file (car suffixes)) + (car path)))) + (if (and (file-exists-p try) (not (file-directory-p try))) + (setq found try))) + (setq suffixes (cdr suffixes))) + (setq path (cdr path))) + found))) + +(defvar ffap-alist + ;; A big mess! Parts are probably useless. + (list + (cons "\\.info\\'" + (defun ffap-info (name) + (ffap-locate-file + name '("" ".info") + (or (ffap-soft-value "Info-directory-list") + (ffap-soft-value "Info-default-directory-list") + ;; v18: + (list (ffap-soft-value "Info-directory" "~/info/")))))) + ;; Since so many info files do not have .info extension, also do this: + (cons "\\`info/" + (defun ffap-info-2 (name) (ffap-info (substring name 5)))) + (cons "\\`[-a-z]+\\'" + ;; This ignores the node! "(emacs)Top" same as "(emacs)Intro" + (defun ffap-info-3 (name) + (and (equal (ffap-string-around) "()") (ffap-info name)))) + (cons "\\.elc?\\'" + (defun ffap-el (name) (ffap-locate-file name t))) + (cons 'emacs-lisp-mode + (defun ffap-el-mode (name) + ;; We do not bother with "" here, since it was considered above. + ;; Also ignore "elc", for speed (who else reads elc files?) + (and (not (string-match "\\.el\\'" name)) + (ffap-locate-file name '(".el"))))) + '(finder-mode . ffap-el-mode) ; v19: {C-h p} + '(help-mode . ffap-el-mode) ; v19.29 + (cons 'c-mode + (progn + ;; Need better default here: + (defvar ffap-c-path '("/usr/include" "/usr/local/include")) + (defun ffap-c-mode (name) + (ffap-locate-file name t ffap-c-path)))) + '(c++-mode . ffap-c-mode) + '(cc-mode . ffap-c-mode) + '("\\.\\([chCH]\\|cc\\|hh\\)\\'" . ffap-c-mode) + (cons 'tex-mode + ;; Complicated because auctex may not be loaded yet. + (progn + (defvar ffap-tex-path + (ffap-reduce-path + (append + (list ".") + (ffap-list-env "TEXINPUTS") + ;; (ffap-list-env "BIBINPUTS") + (ffap-add-subdirs + (ffap-list-env "TEXINPUTS_SUBDIR" + (ffap-soft-value + "TeX-macro-global" + '("/usr/local/lib/tex/macros" + "/usr/local/lib/tex/inputs") + ))))) + "*Where ffap-tex-mode looks for tex files.") + (defun ffap-tex-mode (name) + (ffap-locate-file name '(".tex" "") ffap-tex-path)))) + (cons 'latex-mode + (defun ffap-latex-mode (name) + ;; Any real need for "" here? + (ffap-locate-file name '(".sty" ".tex" "") ffap-tex-path))) + (cons "\\.\\(tex\\|sty\\|doc\\)\\'" + (defun ffap-tex (name) + (ffap-locate-file name t ffap-tex-path))) + (cons "\\.bib\\'" + (defun ffap-bib (name) + (ffap-locate-file + name t + (ffap-list-env "BIBINPUTS" '("/usr/local/lib/tex/macros/bib"))))) + (cons 'math-mode + (defun ffap-math-mode (name) + (while (string-match "`" name) + (setq name (concat (substring name 0 (match-beginning 0)) + "/" + (substring name (match-end 0))))) + (ffap-locate-file + name '(".m" "") (ffap-soft-value "Mathematica-search-path")))) + (cons "\\`\\." (defun ffap-home (name) (ffap-locate-file name t '("~")))) + (cons "\\`~/" + ;; Maybe a "Lisp Code Directory" reference: + (defun ffap-lcd (name) + (and + (or + ;; lisp-dir-apropos output buffer: + (string-match "Lisp Code Dir" (buffer-name)) + ;; Inside an LCD entry like |~/misc/ffap.el.Z|, + ;; or maybe the holy LCD-Datafile itself: + (member (ffap-string-around) '("||" "|\n"))) + (concat + ;; lispdir.el may not be loaded yet: + (ffap-host-to-path + (ffap-soft-value "elisp-archive-host" + "archive.cis.ohio-state.edu")) + (file-name-as-directory + (ffap-soft-value "elisp-archive-directory" + "/pub/gnu/emacs/elisp-archive/")) + (substring name 2))))) + (cons "^[Rr][Ff][Cc][- #]?\\([0-9]+\\)" ; no $ + (progn + (defvar ffap-rfc-path + (concat (ffap-host-to-path "ds.internic.net") "/rfc/rfc%s.txt")) + (defun ffap-rfc (name) + (format ffap-rfc-path + (substring name (match-beginning 1) (match-end 1)))))) + ) + "Alist of \(KEY . FUNCTION\), applied to text around point. + +If ffap-file-at-point has a string NAME (maybe \"\") which is not an +existing filename, it looks for pairs with a matching KEY: + * if KEY is a symbol, it should equal `major-mode'. + * if KEY is a string, it should match NAME as a regular expression. +If KEY matches, ffap-file-at-point calls \(FUNCTION NAME\). +FUNCTION should return a file, url, or nil \(nil means keep looking +for more KEY matches\). Note URL's are ok despite the function name.") +(put 'ffap-alist 'risky-local-variable t) + + +;;; At-Point Functions: + +(defvar ffap-string-at-point-mode-alist + '( + ;; Slightly controversial decisions: + ;; * strip trailing "@" and ":" + ;; * no commas (good for latex) + (t "--:$+<>@-Z_a-z~" "<@" "@>;.,!?:") + (math-mode ",-:$+<>@-Z_a-z~`" "<" "@>;.,!?`:") ; allow backquote + ;; Note: you are better off using "C-c C-c" in compilation buffers: + ;; Maybe handle "$HOME", or "$(HOME)/bin/foo" in makefile-mode? + ) + "Alist of \(MODE CHARS BEG END\), where MODE is a major-mode or t. +The data are arguments to ffap-string-at-point, used to guess the +filename at point. The `t' entry is the default.") + +(defvar ffap-string-at-point-region '(1 1) + "List (BEG END), last region returned by ffap-string-at-point.") + +(defvar ffap-string-at-point nil + ;; Added at suggestion of RHOGEE (for ff-paths), 7/24/95. + "Last string returned by ffap-string-at-point.") +(defun ffap-string-at-point (&optional chars begpunct endpunct) + "Return maximal string of CHARS (a string) around point. +Optional BEGPUNCT chars before point are stripped from the beginning; +Optional ENDPUNCT chars after point are stripped from the end. +Without arguments, uses `ffap-string-at-point-mode-alist'. +Also sets `ffap-string-at-point' and `ffap-string-at-point-region'." + (if chars + (let* ((pt (point)) + (str + (buffer-substring + (save-excursion + (skip-chars-backward chars) + (and begpunct (skip-chars-forward begpunct pt)) + (setcar ffap-string-at-point-region (point))) + (save-excursion + (skip-chars-forward chars) + (and endpunct (skip-chars-backward endpunct pt)) + (setcar (cdr ffap-string-at-point-region) (point)))))) + (set-text-properties 0 (length str) nil str) + (setq ffap-string-at-point str)) + ;; Get default args from `ffap-string-at-point-mode-alist' + (apply 'ffap-string-at-point + (cdr (or (assq major-mode ffap-string-at-point-mode-alist) + (assq t ffap-string-at-point-mode-alist) + ;; avoid infinite loop! + (error "ffap-string-at-point: bad alist") + ))))) + +(defun ffap-string-around nil + ;; Sometimes useful to decide how to treat a string. + "Return string of two characters around last ffap-string-at-point." + (save-excursion + (format "%c%c" + (progn + (goto-char (car ffap-string-at-point-region)) + (preceding-char)) ; maybe 0 + (progn + (goto-char (nth 1 ffap-string-at-point-region)) + (following-char)) ; maybe 0 + ))) + +(defun ffap-url-at-point nil + "Return URL from around point if it exists, or nil." + ;; Could use url-get-url-at-point instead ... how do they compare? + ;; Both handle "URL:", ignore non-relative links, trim punctuation. + ;; The other will actually look back if point is in whitespace, but + ;; I would rather ffap be non-rabid in such situations. + (and + ffap-url-regexp + (or + ;; In a w3 buffer button zone? + (let (tem) + (and (eq major-mode 'w3-mode) + ;; assume: (boundp 'w3-zone-at) (boundp 'w3-zone-data) + (setq tem (w3-zone-at (point))) + (consp (setq tem (w3-zone-data tem))) + (nth 2 tem))) + ;; Is there a reason not to strip trailing colon? + (let ((name (ffap-string-at-point + ;; Allow leading digits for email/news id's: + "--:?$+@-Z_a-z~#,%" "^A-Za-z0-9" ":;.,!?"))) + ;; (case-fold-search t), why? + (cond + ((string-match "^url:" name) (setq name (substring name 4))) + ((and (string-match "\\`[^:@]+@[^:@]+[a-zA-Z]\\'" name) + ;; "foo@bar": could be "mailto" or "news" (a Message-ID). + ;; If not adorned with "<>", it must be "mailto". + ;; Otherwise could be either, so consult `ffap-foo@bar-prefix'. + (let ((prefix (if (and (equal (ffap-string-around) "<>") + ;; At least a couple of odd characters: + (string-match "[$.0-9].*[$.0-9].*@" name)) + ;; Could be news: + ffap-foo@bar-prefix + "mailto"))) + (and prefix (setq name (concat prefix ":" name)))))) + ((ffap-newsgroup-p name) (setq name (concat "news:" name))) + ((and (string-match "\\`[a-z0-9]+\\'" name) ; + (equal (ffap-string-around) "<>") + ;; (ffap-user-p name): + (not (string-match "~" (expand-file-name (concat "~" name)))) + ) + (setq name (concat "mailto:" name))) + ) + (and (ffap-url-p name) name) + )))) + +(defvar ffap-gopher-regexp + "^.*\\<\\(Type\\|Name\\|Path\\|Host\\|Port\\) *= *\\(.*\\) *$" + "Regexp Matching a line in a gopher bookmark (maybe indented). +Two subexpressions are the KEY and VALUE.") + +(defun ffap-gopher-at-point nil + "If point is inside a gopher bookmark block, return its url." + ;; We could use gopher-parse-bookmark from gopher.el, but it is not + ;; so robust, and w3 users are better off without gopher.el anyway. + (save-excursion + (beginning-of-line) + (if (looking-at ffap-gopher-regexp) + (progn + (while (and (looking-at ffap-gopher-regexp) (not (bobp))) + (forward-line -1)) + (or (looking-at ffap-gopher-regexp) (forward-line 1)) + (let ((type "1") name path host (port "70")) + (while (looking-at ffap-gopher-regexp) + (let ((var (intern + (downcase + (buffer-substring (match-beginning 1) + (match-end 1))))) + (val (buffer-substring (match-beginning 2) + (match-end 2)))) + (set var val) + (forward-line 1))) + (if (and path (string-match "^ftp:.*@" path)) + (concat "ftp://" + (substring path 4 (1- (match-end 0))) + (substring path (match-end 0))) + (and (= (length type) 1) + host;; (ffap-machine-p host) + (concat "gopher://" host + (if (equal port "70") "" (concat ":" port)) + "/" type path)))))))) + +(defvar ffap-ftp-sans-slash-regexp + (and + ffap-ftp-regexp + ;; Note: by now, we know it is not an URL. + ;; Icky regexp avoids: default: 123: foo::bar cs:pub + ;; It does match on: mic@cs: cs:/pub mathcs.emory.edu: (point at end) + ;; Todo: handle foo.com://path + "\\`\\([^:@]+@[^:@]+:\\|[^@.:]+\\.[^@:]+:\\|[^:]+:[~/]\\)\\([^:]\\|\\'\\)") + "Strings matching this are coerced to ftp paths by ffap. +That is, ffap just prepends \"/\". Set to nil to disable.") + +(defun ffap-file-at-point nil + "Return filename from around point if it exists, or nil. +Existence test is skipped for names that look remote. +If the filename is not obvious, it also tries `ffap-alist', +which may actually result in an URL rather than a filename." + ;; Note: this function does not need to look for URL's, just + ;; filenames. On the other hand, it is responsible for converting + ;; a pseudo-URL "site.dom://path" to an ftp path "/site.dom:/path" + (let* ((case-fold-search t) ; url prefixes are case-insensitive + (data (match-data)) + (string (ffap-string-at-point)) ; use its mode-alist + (name + (condition-case nil + (substitute-in-file-name string) + (error string))) + (abs (file-name-absolute-p name)) + (default-directory default-directory)) + (unwind-protect + (cond + ;; Immediate rejects (/ and // are too common in C++): + ((member name '("" "/" "//")) nil) + ;; Immediately test local filenames. If default-directory is + ;; remote, you probably already have a connection. + ((and (not abs) (ffap-file-exists-string name))) + ;; Accept remote names without actual checking (too slow): + ((if abs + (ffap-file-remote-p name) + ;; Try adding a leading "/" (common omission in ftp paths): + (and + ffap-ftp-sans-slash-regexp + (string-match ffap-ftp-sans-slash-regexp name) + (ffap-file-remote-p (concat "/" name))))) + ;; Ok, not remote, try the existence test even if it is absolute: + ((and abs (ffap-file-exists-string name))) + ;; File does not exist, try the alist: + ((let ((alist ffap-alist) tem try case-fold-search) + (while (and alist (not try)) + (setq tem (car alist) alist (cdr alist)) + (if (or (eq major-mode (car tem)) + (and (stringp (car tem)) + (string-match (car tem) name))) + (and (setq try (funcall (cdr tem) name)) + (setq try (or + (ffap-url-p try) ; not a file! + (ffap-file-remote-p try) + (ffap-file-exists-string try)))))) + try)) + ;; Alist failed? Try to guess an active remote connection + ;; from buffer variables, and try once more, both as an + ;; absolute and relative path on that remote host. + ((let* (ffap-rfs-regexp ; suppress + (remote-dir + (cond + ((ffap-file-remote-p default-directory)) + ((and (eq major-mode 'internal-ange-ftp-mode) + (string-match "^\\*ftp \\(.*\\)@\\(.*\\)\\*$" + (buffer-name))) + (concat "/" (substring (buffer-name) 5 -1) ":")) + ;; This is too often a bad idea: + ;;((and (eq major-mode 'w3-mode) + ;; (stringp url-current-server)) + ;; (host-to-ange-path url-current-server)) + ))) + (and remote-dir + (or + (and (string-match "\\`\\(/?~?ftp\\)/" name) + (ffap-file-exists-string + (ffap-replace-path-component + remote-dir (substring name (match-end 1))))) + (ffap-file-exists-string + (ffap-replace-path-component remote-dir name)))))) + ) + (store-match-data data)))) + + +;;; ffap-read-file-or-url: +;; +;; Want to read filenames with completion as in read-file-name, but +;; also allow URL's which read-file-name-internal would truncate at +;; the "//" string. Solution here is to replace read-file-name-internal +;; with another function that does not attempt to complete url's. + +;; We implement a pretty clean completion semantics to work with +;; packages like complete.el and exit-minibuffer.el. Even for +;; complete.el (v19.22), we still need to make a small patch (it has a +;; hardwired list of `minibuffer-completion-table' values which it +;; considers to deal with filenames, this ought to be a variable). + +(defun ffap-read-file-or-url (prompt guess) + "Read a file or url from minibuffer, with PROMPT and initial GUESS." + (or guess (setq guess default-directory)) + (let ((filep (not (ffap-url-p guess))) dir) + ;; Tricky: guess may have or be a local directory, like "w3/w3.elc" + ;; or "w3/" or "../el/ffap.el" or "../../../" + (if filep + (progn + (or (ffap-file-remote-p guess) + (setq guess (abbreviate-file-name (expand-file-name guess)))) + (setq dir (file-name-directory guess)))) + (apply + 'completing-read + prompt + 'ffap-read-file-or-url-internal + dir + nil + (if (and dir) (cons guess (length dir)) guess) + (list 'file-name-history) + ))) + +(defvar url-global-history-completion-list nil) ; variable in w3/url.el + +(defun ffap-read-url-internal (string dir action) + ;; Complete URL's from history, always treat given url as acceptable. + (let ((hist url-global-history-completion-list)) + (cond + ((not action) + (or (try-completion string hist) string)) + ((eq action t) + (or (all-completions string hist) (list string))) + ;; lambda? + (t string)))) + +(defun ffap-read-file-or-url-internal (string dir action) + (if (ffap-url-p string) + (ffap-read-url-internal string dir action) + (read-file-name-internal string dir action))) + +;; Unfortunately, for complete.el to work correctly, we need to vary +;; the value it sees of minibuffer-completion-table, depending on the +;; current minibuffer contents! It would be nice if it were written a +;; little more easily. I consider this a bug in complete.el, since +;; the builtin emacs functions do not have this problem. +(and + (featurep 'complete) + (require 'advice) + (defadvice PC-do-completion (around ffap-fix act) + "Work with ffap.el." + (let ((minibuffer-completion-table minibuffer-completion-table) + ;; (minibuffer-completion-predicate minibuffer-completion-predicate) + ) + (and (eq minibuffer-completion-table 'ffap-read-file-or-url-internal) + (setq minibuffer-completion-table + (if (ffap-url-p (buffer-string)) + ;; List would work better with icomplete ... + 'ffap-read-url-internal + 'read-file-name-internal))) + ad-do-it))) + + +;;; Highlighting: +;; +;; Based on overlay highlighting in Emacs 19.28 isearch.el. + +(defvar ffap-highlight (and window-system t) + "If non-nil, ffap highlights the current buffer substring.") + +(defvar ffap-overlay nil "Overlay used by ffap-highlight.") + +(defun ffap-highlight (&optional remove) + "If `ffap-highlight' is set, highlight the guess in the buffer. +That is, the last buffer substring found by ffap-string-at-point. +Optional argument REMOVE means to remove any such highlighting. +Uses the face `ffap' if it is defined, else `highlight'." + (cond + (remove (and ffap-overlay (delete-overlay ffap-overlay))) + ((not ffap-highlight) nil) + (ffap-overlay + (move-overlay ffap-overlay + (car ffap-string-at-point-region) + (nth 1 ffap-string-at-point-region) + (current-buffer))) + (t + (setq ffap-overlay (apply 'make-overlay ffap-string-at-point-region)) + (overlay-put ffap-overlay 'face + (if (internal-find-face 'ffap nil) + 'ffap 'highlight))))) + +;;; The big enchilada: + +(defun ffap-guesser nil + "Return file or URL or nil, guessed from text around point." + (or (and ffap-url-regexp + (ffap-fixup-url (or (ffap-url-at-point) + (ffap-gopher-at-point)))) + (ffap-file-at-point) ; may yield url! + (ffap-fixup-machine (ffap-machine-at-point)))) + +(defun ffap-prompter (&optional guess) + ;; Does guess and prompt step for find-file-at-point. + ;; Extra complication just to do the temporary highlighting. + (unwind-protect + (ffap-read-file-or-url + (if ffap-url-regexp "Find file or URL: " "Find file: ") + (prog1 + (setq guess (or guess (ffap-guesser))) + (and guess (ffap-highlight)))) + (ffap-highlight t))) + +;;;###autoload +(defun find-file-at-point (&optional filename) + "Find FILENAME (or url), guessing default from text around point. +If `ffap-dired-wildcards' is set, wildcard patterns are passed to dired. +See also the functions ffap-file-at-point, ffap-url-at-point. +With a prefix, this command behaves *exactly* like `ffap-file-finder'. +If `ffap-require-prefix' is set, the prefix meaning is reversed. + +See ftp://ftp.mathcs.emory.edu/pub/mic/emacs/ for most recent version." + (interactive) + (if (and (interactive-p) + (if ffap-require-prefix (not current-prefix-arg) + current-prefix-arg)) + ;; Do exactly the ffap-file-finder command, even the prompting: + (call-interactively ffap-file-finder) + (or filename (setq filename (ffap-prompter))) + (cond + ((ffap-url-p filename) + (funcall ffap-url-fetcher filename)) + ;; This junk more properly belongs in a modified ffap-file-finder: + ((and ffap-dired-wildcards (string-match ffap-dired-wildcards filename)) + (dired filename)) + ((or (not ffap-newfile-prompt) + (file-exists-p filename) + (y-or-n-p "File does not exist, create buffer? ")) + (funcall ffap-file-finder + ;; expand-file-name fixes "~/~/.emacs" bug sent by CHUCKR. + (expand-file-name filename))) + ;; User does not want to find a non-existent file: + ((signal 'file-error (list "Opening file buffer" + "no such file or directory" + filename)))))) + +;; M-x shortcut: +(fset 'ffap 'find-file-at-point) + + +;;; Menu support: +;; +;; Bind ffap-menu to a key if you want, since it also works in tty mode. +;; Or just use it through the ffap-at-mouse binding (next section). + +(defvar ffap-menu-regexp nil + "*If non-nil, overrides `ffap-next-regexp' during ffap-menu. +Make this more restrictive for faster menu building. +For example, try \":/\" for url (and some ftp) references.") + +(defvar ffap-menu-alist nil + "Buffer local menu of files and urls cached by ffap-menu.") +(make-variable-buffer-local 'ffap-menu-alist) + +;;;###autoload +(defun ffap-menu (&optional rescan) + "Puts up a menu of files and urls mentioned in the buffer. +Sets mark, jumps to choice, and tries to fetch it. +Menu is cached in `ffap-menu-alist', but will always be rebuilt +with the optional RESCAN argument (a prefix interactively). +Searches buffer with `ffap-menu-regexp' (see `ffap-next-regexp')." + (interactive "P") + ;; (require 'imenu) -- no longer used, but roughly emulated + (if (or (not ffap-menu-alist) rescan + ;; or if the first entry is wrong: + (and ffap-menu-alist + (let ((first (car ffap-menu-alist))) + (save-excursion + (goto-char (cdr first)) + (not (equal (car first) (ffap-guesser))))))) + (ffap-menu-rescan)) + ;; Tail recursive: + (ffap-menu-ask + (if ffap-url-regexp "Find file or URL" "Find file") + (cons (cons "*Rescan Buffer*" -1) ffap-menu-alist) + 'ffap-menu-cont)) + +(defun ffap-menu-cont (choice) ; continuation of ffap-menu + (if (< (cdr choice) 0) + (ffap-menu t) ; *Rescan* + (push-mark) + (goto-char (cdr choice)) + ;; Momentary highlight: + (unwind-protect + (progn + (and ffap-highlight (ffap-guesser) (ffap-highlight)) + (sit-for 0) ; display + (find-file-at-point (car choice))) + (ffap-highlight t)))) + +(defun ffap-menu-ask (title alist cont) + "Prompt from a menu of choices, and then apply some action. +Arguments are TITLE, ALIST, and CONT (a continuation). +This uses either a menu or the minibuffer depending on invocation. +The TITLE string is used as either the prompt or menu title. +Each (string . data) entry in ALIST defines a choice (data is ignored). +Once the user makes a choice, function CONT is applied to the entry. +Always returns nil." + ;; Bug: minibuffer prompting assumes the strings are unique. + ;; Todo: break up long menus into multiple panes (like imenu). + (let ((choice + (if (and (fboundp 'x-popup-menu) ; 19 or XEmacs 19.13 + (boundp 'last-nonmenu-event) ; not in XEmacs 19.13 + (listp last-nonmenu-event)) + (x-popup-menu + t + (list "" + (cons title + (mapcar + (function (lambda (i) (cons (car i) i))) + alist)))) + ;; Automatically popup completion help, one way or another: + (let ((minibuffer-setup-hook 'minibuffer-completion-help) + (unread-command-char -1)) + ;; BUG: this code assumes that "" is not a valid choice + (completing-read + (format "%s (default %s): " title (car (car alist))) + alist nil t + ;; Let first be default: + ;; (if ffap-v18 (car (car alist)) + ;; (cons (car (car alist)) 0)) + ;; No, then you do not get all completions! + nil + ))))) + ;; Defaulting: convert "" to (car (car alist)) + (and (equal choice "") (setq choice (car (car alist)))) + (and (stringp choice) (setq choice (assoc choice alist))) + (if choice (funcall cont choice) (message "No choice made!"))) + nil) ; return nothing + +(defun ffap-menu-rescan nil + (interactive) + (let ((ffap-next-regexp (or ffap-menu-regexp ffap-next-regexp)) + (range (- (point-max) (point-min))) item) + (setq ffap-menu-alist nil) + (save-excursion + (goto-char (point-min)) + (while (setq item (ffap-next-guess)) + (setq ffap-menu-alist (cons (cons item (point)) ffap-menu-alist)) + (message "Scanning...%2d%% <%s>" + (/ (* 100 (- (point) (point-min))) range) item)))) + (message "Scanning...done") + ;; Remove duplicates. + (setq ffap-menu-alist ; sort by item + (sort ffap-menu-alist + (function + (lambda (a b) (string-lessp (car a) (car b)))))) + (let ((ptr ffap-menu-alist)) + (while (cdr ptr) + (if (equal (car (car ptr)) (car (car (cdr ptr)))) + (setcdr ptr (cdr (cdr ptr))) + (setq ptr (cdr ptr))))) + (setq ffap-menu-alist ; sort by position + (sort ffap-menu-alist + (function + (lambda (a b) (< (cdr a) (cdr b))))))) + + +;;; Mouse Support: +;; +;; I suggest a mouse binding, something like: +;; (global-set-key [S-mouse-1] 'ffap-at-mouse) + +(defvar ffap-at-mouse-fallback 'ffap-menu + "Invoked by ffap-at-mouse if no file or url found at point. +A command symbol, or nil for nothing.") +(put 'ffap-at-mouse-fallback 'risky-local-variable t) + +(defun ffap-at-mouse (e) + "Find file or URL guessed from text around mouse point. +If none is found, call `ffap-at-mouse-fallback'." + (interactive "e") + (let ((guess + ;; Maybe less surprising without the save-excursion? + (save-excursion + (mouse-set-point e) + ;; Would like to do nothing unless click was *on* text. How? + ;; (cdr (posn-col-row (event-start e))) is always same as + ;; current column. For posn-x-y, need pixel-width! + (ffap-guesser)))) + (cond + (guess + (ffap-highlight) + (unwind-protect + (progn + (sit-for 0) ; display + (message "Guessing `%s'" guess) + (find-file-at-point guess)) + (ffap-highlight t))) + ((and (interactive-p) + ffap-at-mouse-fallback) + (call-interactively ffap-at-mouse-fallback)) + ((message "No file or URL found at mouse click."))))) + + +;;; ffap-other-* commands +;; Suggested by KPC. Possible bindings for C-x 4 C-f, C-x 5 C-f. + +(defun ffap-other-window nil + "Like ffap, but put buffer in another window." + (interactive) + (switch-to-buffer-other-window + (save-window-excursion (call-interactively 'ffap) (current-buffer)))) + +(defun ffap-other-frame nil + "Like ffap, but put buffer in another frame." + (interactive) + (switch-to-buffer-other-frame + (save-window-excursion (call-interactively 'ffap) (current-buffer)))) + + +;;; ffap-bug: +(defun ffap-bug nil + ;; Tested with Emacs 19.28 reporter.el + "Submit a bug report for ffap." + (interactive) + (require 'reporter) + (let ((reporter-prompt-for-summary-p t)) + (reporter-submit-bug-report + "mic@mathcs.emory.edu" "ffap " + (mapcar 'intern (all-completions "ffap-" obarray 'boundp)) + ))) +(fset 'ffap-submit-bug 'ffap-bug) ; another likely name + + +;;; Todo, End. +;; +;; * w3 may eventually make URL's part of the filesystem! +;; this package (prompt & completion) could become much simpler +;; * improve minibuffer-completion-help display of long completions +;; * notice "machine.dom blah blah blah path/file" (how?) +;; * check X selections (x-get-selection PRIMARY/SECONDARY LENGTH/TEXT) +;; * let "/path/file#key" jump to key (anchor or regexp) in /path/file +;; * notice node in "(dired)Virtual Dired" (how to handle space?) +;; * try find-tag on symbol if TAGS is loaded (need above) +;; +;; For information on URL/URI syntax, try: +;; +;; +;; + +;; Local Variables? +;; foo: bar +;; End: + + +;;; ffap.el ends here -- 2.39.2