lisp/net/webjump.el

   1 ;;; webjump.el --- programmable Web hotlist
   2
   3 ;; Copyright (C) 1996, 1997, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5
   6 ;; Author:    Neil W. Van Dyke <nwv@acm.org>
   7 ;; Created:   09-Aug-1996
   8 ;; Keywords:  comm www
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; WebJump provides a sort of ``programmable hotlist'' of Web sites that can
  28 ;; quickly be invoked in your Web browser.  Each Web site in the hotlist has a
  29 ;; name, and you select the desired site name via a completing string prompt in
  30 ;; the minibuffer.  The URL for each Web site is defined as a static string or
  31 ;; a built-in or custom function, allowing interactive prompting for
  32 ;; site-specific queries and options.
  33
  34 ;; Note that WebJump was originally intended to complement your conventional
  35 ;; browser-based hotlist, not replace it.  (Though there's no reason you
  36 ;; couldn't use WebJump for your entire hotlist if you were so inclined.)
  37
  38 ;; The `webjump-sites' variable, which defines the hotlist, defaults to some
  39 ;; example sites.  You'll probably want to override it with your own favorite
  40 ;; sites.  The documentation for the variable describes the syntax.
  41
  42 ;; You may wish to add something like the following to your `.emacs' file:
  43 ;;
  44 ;;   (require 'webjump)
  45 ;;   (global-set-key "\C-cj" 'webjump)
  46 ;;   (setq webjump-sites
  47 ;;         (append '(
  48 ;;                   ("My Home Page" . "www.someisp.net/users/joebobjr/")
  49 ;;                   ("Pop's Site"   . "www.joebob-and-son.com/")
  50 ;;                   )
  51 ;;                 webjump-sample-sites))
  52 ;;
  53 ;; The above loads this package, binds `C-c j' to invoke WebJump, and adds your
  54 ;; personal favorite sites to the hotlist.
  55
  56 ;; The `webjump-sample-sites' variable mostly contains some site entries that
  57 ;; are expected to be generally relevant to many users, but excluding
  58 ;; those that the GNU project would not want to recommend.
  59
  60 ;; The `browse-url' package is used to submit URLs to the browser, so any
  61 ;; browser-specific configuration should be done there.
  62
  63 ;;; Code:
  64
  65 ;;-------------------------------------------------------- Package Dependencies
  66
  67 (require 'browse-url)
  68
  69 ;;------------------------------------------------------------------- Constants
  70
  71 (defvar webjump-sample-sites
  72   '(
  73     ;; FSF, not including Emacs-specific.
  74     ("GNU Project FTP Archive" .
  75      ;; GNU FTP Mirror List from http://www.gnu.org/order/ftp.html
  76      [mirrors "ftp://ftp.gnu.org/pub/gnu/"
  77               ;; United States
  78               "ftp://mirrors.kernel.org/gnu"
  79               "ftp://gatekeeper.dec.com/pub/GNU/"
  80               "ftp://ftp.keystealth.org/pub/gnu/"
  81               "ftp://mirrors.usc.edu/pub/gnu/"
  82               "ftp://cudlug.cudenver.edu/pub/mirrors/ftp.gnu.org/"
  83               "ftp://ftp.cise.ufl.edu/pub/mirrors/GNU/"
  84               "ftp://uiarchive.cso.uiuc.edu/pub/ftp/ftp.gnu.org/gnu/"
  85               "ftp://gnu.cs.lewisu.edu/gnu/"
  86               "ftp://ftp.in-span.net/pub/mirrors/ftp.gnu.org/"
  87               "ftp://gnu.ms.uky.edu/pub/mirrors/gnu/"
  88               "ftp://ftp.algx.net/pub/gnu/"
  89               "ftp://aeneas.mit.edu/pub/gnu/"
  90               "ftp://ftp.egr.msu.edu/pub/gnu/"
  91               "ftp://ftp.wayne.edu/pub/gnu/"
  92               "ftp://wuarchive.wustl.edu/mirrors/gnu/"
  93               "ftp://gnu.teleglobe.net/ftp.gnu.org/"
  94               "ftp://ftp.cs.columbia.edu/archives/gnu/prep/"
  95               "ftp://ftp.ece.cornell.edu/pub/mirrors/gnu/"
  96               "ftp://ftp.ibiblio.org/pub/mirrors/gnu/"
  97               "ftp://ftp.cis.ohio-state.edu/mirror/gnu/"
  98               "ftp://ftp.club.cc.cmu.edu/gnu/"
  99               "ftp://ftp.sunsite.utk.edu/pub/gnu/ftp/"
 100               "ftp://thales.memphis.edu/pub/gnu/"
 101               "ftp://gnu.wwc.edu"
 102               "ftp://ftp.twtelecom.net/pub/GNU/"
 103               ;; Africa
 104               "ftp://ftp.sun.ac.za/mirrorsites/ftp.gnu.org"
 105               ;; The Americas
 106               "ftp://ftp.unicamp.br/pub/gnu/"
 107               "ftp://master.softaplic.com.br/pub/gnu/"
 108               "ftp://ftp.matrix.com.br/pub/gnu/"
 109               "ftp://ftp.pucpr.br/gnu"
 110               "ftp://ftp.linorg.usp.br/gnu"
 111               "ftp://ftp.cs.ubc.ca/mirror2/gnu/"
 112               "ftp://cs.ubishops.ca/pub/ftp.gnu.org/"
 113               "ftp://ftp.inf.utfsm.cl/pub/gnu/"
 114               "ftp://sunsite.ulatina.ac.cr/Mirrors/GNU/"
 115               "ftp://www.gnu.unam.mx/pub/gnu/software/"
 116               "ftp://gnu.cem.itesm.mx/pub/mirrors/gnu.org/"
 117               "ftp://ftp.azc.uam.mx/mirrors/gnu/"
 118               ;; Australia
 119               "ftp://mirror.aarnet.edu.au/pub/gnu/"
 120               "ftp://gnu.mirror.pacific.net.au/gnu/"
 121               ;; Asia
 122               "ftp://ftp.cs.cuhk.edu.hk/pub/gnu/gnu/"
 123               "ftp://sunsite.ust.hk/pub/gnu/"
 124               "ftp://ftp.gnupilgrims.org/pub/gnu"
 125               "ftp://www.imtech.res.in/mirror/gnuftp/"
 126               "ftp://kambing.vlsm.org/gnu"
 127               "ftp://ftp.cs.huji.ac.il/mirror/GNU/"
 128               "ftp://tron.um.u-tokyo.ac.jp/pub/GNU/"
 129               "ftp://core.ring.gr.jp/pub/GNU/"
 130               "ftp://ftp.ring.gr.jp/pub/GNU/"
 131               "ftp://mirrors.hbi.co.jp/gnu/"
 132               "ftp://ftp.cs.titech.ac.jp/pub/gnu/"
 133               "ftp://ftpmirror.hanyang.ac.kr/GNU/"
 134               "ftp://ftp.linux.sarang.net/mirror/gnu/gnu/"
 135               "ftp://ftp.xgate.co.kr/pub/mirror/gnu/"
 136               "ftp://ftp://gnu.xinicks.com/"
 137               "ftp://ftp.isu.net.sa/pub/gnu/"
 138               "ftp://ftp.nctu.edu.tw/UNIX/gnu/"
 139               "ftp://coda.nctu.edu.tw/UNIX/gnu/"
 140               "ftp://ftp1.sinica.edu.tw/pub3/GNU/gnu/"
 141               "ftp://gnu.cdpa.nsysu.edu.tw/gnu"
 142               "ftp://ftp.nectec.or.th/pub/mirrors/gnu/"
 143               ;; Europe
 144               "ftp://ftp.gnu.vbs.at/"
 145               "ftp://ftp.univie.ac.at/packages/gnu/"
 146               "ftp://gd.tuwien.ac.at/gnu/gnusrc/"
 147               "ftp://ftp.belnet.be/mirror/ftp.gnu.org/"
 148               "ftp://gnu.blic.net/pub/gnu/"
 149               "ftp://ftp.fi.muni.cz/pub/gnu/"
 150               "ftp://ftp.dkuug.dk/pub/gnu/"
 151               "ftp://sunsite.dk/mirrors/gnu"
 152               "ftp://ftp.funet.fi/pub/gnu/prep/"
 153               "ftp://ftp.irisa.fr/pub/gnu/"
 154               "ftp://ftp.cs.univ-paris8.fr/mirrors/ftp.gnu.org/"
 155               "ftp://ftp.cs.tu-berlin.de/pub/gnu/"
 156               "ftp://ftp.leo.org/pub/comp/os/unix/gnu/"
 157               "ftp://ftp.informatik.rwth-aachen.de/pub/gnu/"
 158               "ftp://ftp.de.uu.net/pub/gnu/"
 159               "ftp://ftp.freenet.de/pub/ftp.gnu.org/gnu/"
 160               "ftp://ftp.cs.uni-bonn.de/pub/gnu/"
 161               "ftp://ftp-stud.fht-esslingen.de/pub/Mirrors/ftp.gnu.org/"
 162               "ftp://ftp.stw-bonn.de/pub/mirror/ftp.gnu.org/"
 163               "ftp://ftp.math.uni-bremen.de/pub/gnu"
 164               "ftp://ftp.forthnet.gr/pub/gnu/"
 165               "ftp://ftp.ntua.gr/pub/gnu/"
 166               "ftp://ftp.duth.gr/pub/gnu/"
 167               "ftp://ftp.physics.auth.gr/pub/gnu/"
 168               "ftp://ftp.esat.net/pub/gnu/"
 169               "ftp://ftp.heanet.ie/mirrors/ftp.gnu.org"
 170               "ftp://ftp.lugroma2.org/pub/gnu/"
 171               "ftp://ftp.gnu.inetcosmos.org/pub/gnu/"
 172               "ftp://ftp.digitaltrust.it/pub/gnu"
 173               "ftp://ftp://rm.mirror.garr.it/mirrors/gnuftp"
 174               "ftp://ftp.nluug.nl/pub/gnu/"
 175               "ftp://ftp.mirror.nl/pub/mirror/gnu/"
 176               "ftp://ftp.nl.uu.net/pub/gnu/"
 177               "ftp://mirror.widexs.nl/pub/gnu/"
 178               "ftp://ftp.easynet.nl/mirror/GNU/"
 179               "ftp://ftp.win.tue.nl/pub/gnu"
 180               "ftp://gnu.mirror.vuurwerk.net/pub/GNU/"
 181               "ftp://gnu.kookel.org/pub/ftp.gnu.org/"
 182               "ftp://ftp.uninett.no/pub/gnu/"
 183               "ftp://ftp.task.gda.pl/pub/gnu/"
 184               "ftp://sunsite.icm.edu.pl/pub/gnu/"
 185               "ftp://ftp.man.poznan.pl/pub/gnu"
 186               "ftp://ftp.ist.utl.pt/pub/GNU/gnu/"
 187               "ftp://ftp.telepac.pt/pub/gnu/"
 188               "ftp://ftp.timisoara.roedu.net/mirrors/ftp.gnu.org/pub/gnu"
 189               "ftp://ftp.chg.ru/pub/gnu/"
 190               "ftp://gnuftp.axitel.ru/"
 191               "ftp://ftp.arnes.si/software/gnu/"
 192               "ftp://ftp.etsimo.uniovi.es/pub/gnu/"
 193               "ftp://ftp.rediris.es/pub/gnu/"
 194               "ftp://ftp.chl.chalmers.se/pub/gnu/"
 195               "ftp://ftp.isy.liu.se/pub/gnu/"
 196               "ftp://ftp.luth.se/pub/unix/gnu/"
 197               "ftp://ftp.stacken.kth.se/pub/gnu/"
 198               "ftp://ftp.sunet.se/pub/gnu/"
 199               "ftp://sunsite.cnlab-switch.ch/mirror/gnu/"
 200               "ftp://ftp.ulak.net.tr/gnu/"
 201               "ftp://ftp.gnu.org.ua"
 202               "ftp://ftp.mcc.ac.uk/pub/gnu/"
 203               "ftp://ftp.mirror.ac.uk/sites/ftp.gnu.org/gnu/"
 204               "ftp://ftp.warwick.ac.uk/pub/gnu/"
 205               "ftp://ftp.hands.com/ftp.gnu.org/"
 206               "ftp://gnu.teleglobe.net/ftp.gnu.org/"])
 207     ("GNU Project Home Page" . "www.gnu.org")
 208
 209     ;; Emacs.
 210     ("Emacs Home Page" .
 211      "www.gnu.org/software/emacs/emacs.html")
 212     ("Savannah Emacs page" .
 213      "savannah.gnu.org/projects/emacs")
 214     ("Emacs Lisp List" .
 215      "www.damtp.cam.ac.uk/user/eglen/emacs/ell.html")
 216     ("Emacs Wiki" .
 217      [simple-query "www.emacswiki.org"
 218                    "www.emacswiki.org/cgi-bin/wiki/" ""])
 219
 220     ;; Internet search engines.
 221     ("Google" .
 222      [simple-query "www.google.com"
 223                    "www.google.com/search?q=" ""])
 224     ("Google Groups" .
 225      [simple-query "groups.google.com"
 226                    "groups.google.com/groups?q=" ""])
 227     ("Yahoo" .
 228      [simple-query "www.yahoo.com" "search.yahoo.com/search?p=" ""])
 229     ("Yahoo: Reference" . "www.yahoo.com/Reference/")
 230     ("Wikipedia" .
 231      [simple-query "wikipedia.org" "wikipedia.org/wiki/" ""])
 232
 233     ;; Misc. general interest.
 234     ("Interactive Weather Information Network" . webjump-to-iwin)
 235     ("Usenet FAQs" .
 236      "www.faqs.org/faqs/")
 237     ("RTFM Usenet FAQs by Group" .
 238      "ftp://rtfm.mit.edu/pub/usenet-by-group/")
 239     ("RTFM Usenet FAQs by Hierachy" .
 240      "ftp://rtfm.mit.edu/pub/usenet-by-hierarchy/")
 241     ("X Consortium Archive" . "ftp.x.org")
 242
 243     ;; Computer social issues, privacy, professionalism.
 244     ("Association for Computing Machinery" . "www.acm.org")
 245     ("Computer Professionals for Social Responsibility" . "www.cpsr.org")
 246     ("Electronic Frontier Foundation" . "www.eff.org")
 247     ("IEEE Computer Society" . "www.computer.org")
 248     ("Risks Digest" . webjump-to-risks)
 249
 250     ;; More.
 251     ("Supplemental Web site list for webjump" .
 252      "www.neilvandyke.org/webjump/")
 253
 254     )
 255   "Sample hotlist for WebJump.  See the documentation for the `webjump'
 256 function and the `webjump-sites' variable.")
 257
 258 (defvar webjump-state-to-postal-alist
 259   '(("Alabama" . "al") ("Alaska" . "ak") ("Arizona" . "az") ("Arkansas" . "ar")
 260     ("California" . "ca") ("Colorado" . "co") ("Connecticut" . "ct")
 261     ("Delaware" . "de") ("Florida" . "fl") ("Georgia" . "ga") ("Hawaii" . "hi")
 262     ("Idaho" . "id") ("Illinois" . "il") ("Indiana" . "in") ("Iowa" . "ia")
 263     ("Kansas" . "ks") ("Kentucky" . "ky") ("Louisiana" . "la") ("Maine" . "me")
 264     ("Maryland" . "md") ("Massachusetts" . "ma") ("Michigan" . "mi")
 265     ("Minnesota" . "mn") ("Mississippi" . "ms") ("Missouri" . "mo")
 266     ("Montana" . "mt") ("Nebraska" . "ne") ("Nevada" . "nv")
 267     ("New Hampshire" . "nh") ("New Jersey" . "nj") ("New Mexico" . "nm")
 268     ("New York" . "ny") ("North Carolina" . "nc") ("North Dakota" . "nd")
 269     ("Ohio" . "oh") ("Oklahoma" . "ok") ("Oregon" . "or")
 270     ("Pennsylvania" . "pa") ("Rhode Island" . "ri") ("South Carolina" . "sc")
 271     ("South Dakota" . "sd") ("Tennessee" . "tn") ("Texas" . "tx")
 272     ("Utah" . "ut") ("Vermont" . "vt") ("Virginia" . "va")
 273     ("Washington" . "wa") ("West Virginia" . "wv") ("Wisconsin" . "wi")
 274     ("Wyoming" . "wy")))
 275
 276 ;;------------------------------------------------------------ Option Variables
 277
 278 (defvar webjump-sites
 279   webjump-sample-sites
 280   "*Hotlist for WebJump.
 281
 282 The hotlist is represented as an association list, with the CAR of each cell
 283 being the name of the Web site, and the CDR being the definition for the URL of
 284 that site.  The URL definition can be a string (the URL), a vector (specifying
 285 a special \"builtin\" which returns a URL), a symbol (name of a function which
 286 returns a URL), or a list (which when `eval'ed yields a URL).
 287
 288 If the URL definition is a vector, then a \"builtin\" is used.  A builtin has a
 289 Lisp-like syntax, with the name as the first element of the vector, and any
 290 arguments as the following elements.  The three current builtins are `name',
 291 which returns the name of the site as the URL, `simple-query', which
 292 returns a URL that is a function of a query entered by the user, and `mirrors',
 293 which allows the user to select from among multiple mirror sites for the same
 294 content.
 295
 296 The first argument to the `simple-query' builtin is a static URL to use if the
 297 user enters a blank query.  The second and third arguments are the prefix and
 298 suffix, respectively, to add to the encoded query the user enters.  This
 299 builtin covers Web sites that have single-string searches with the query
 300 embedded in the URL.
 301
 302 The arguments to the `mirrors' builtin are URLs of mirror sites.
 303
 304 If the symbol of a function is given, then the function will be called with the
 305 Web site name (the one you specified in the CAR of the alist cell) as a
 306 parameter.  This might come in handy for various kludges.
 307
 308 For convenience, if the `http://', `ftp://', or `file://' prefix is missing
 309 from a URL, WebJump will make a guess at what you wanted and prepend it before
 310 submitting the URL.")
 311
 312 ;;------------------------------------------------------- Sample Site Functions
 313
 314 (defun webjump-to-iwin (name)
 315   (let ((prefix "http://iwin.nws.noaa.gov/")
 316         (state (webjump-read-choice name "state"
 317                                     (append '(("Puerto Rico" . "pr"))
 318                                             webjump-state-to-postal-alist))))
 319     (if state
 320         (concat prefix "iwin/" state "/"
 321                 (webjump-read-choice name "option"
 322                                      '(("Hourly Report" . "hourly")
 323                                        ("State Forecast" . "state")
 324                                        ("Local Forecast" . "local")
 325                                        ("Zone Forecast" . "zone")
 326                                        ("Short-Term Forecast" . "shortterm")
 327                                        ("Weather Summary" . "summary")
 328                                        ("Public Information" . "public")
 329                                        ("Climatic Data" . "climate")
 330                                        ("Aviation Products" . "aviation")
 331                                        ("Hydro Products" . "hydro")
 332                                        ("Special Weather" . "special")
 333                                        ("Watches and Warnings" . "warnings"))
 334                                      "zone")
 335                 ".html")
 336       prefix)))
 337
 338 (defun webjump-to-risks (name)
 339   (let (issue volume)
 340     (if (and (setq volume (webjump-read-number (concat name " volume")))
 341              (setq issue  (webjump-read-number (concat name " issue"))))
 342         (format "catless.ncl.ac.uk/Risks/%d.%02d.html" volume issue)
 343       "catless.ncl.ac.uk/Risks/")))
 344
 345 ;;-------------------------------------------------------------- Core Functions
 346
 347 ;;;###autoload
 348 (defun webjump ()
 349   "Jumps to a Web site from a programmable hotlist.
 350
 351 See the documentation for the `webjump-sites' variable for how to customize the
 352 hotlist.
 353
 354 Please submit bug reports and other feedback to the author, Neil W. Van Dyke
 355 <nwv@acm.org>."
 356   (interactive)
 357   (let* ((completion-ignore-case t)
 358          (item (assoc-string
 359                 (completing-read "WebJump to site: " webjump-sites nil t)
 360                 webjump-sites t))
 361          (name (car item))
 362          (expr (cdr item)))
 363     (browse-url (webjump-url-fix
 364                  (cond ((not expr) "")
 365                        ((stringp expr) expr)
 366                        ((vectorp expr) (webjump-builtin expr name))
 367                        ((listp expr) (eval expr))
 368                        ((symbolp expr)
 369                         (if (fboundp expr)
 370                             (funcall expr name)
 371                           (error "WebJump URL function \"%s\" undefined"
 372                                  expr)))
 373                        (t (error "WebJump URL expression for \"%s\" invalid"
 374                                  name)))))))
 375
 376 (defun webjump-builtin (expr name)
 377   (if (< (length expr) 1)
 378       (error "WebJump URL builtin for \"%s\" empty" name))
 379   (let ((builtin (aref expr 0)))
 380     (cond
 381      ((eq builtin 'mirrors)
 382       (if (= (length expr) 1)
 383           (error
 384            "WebJump URL builtin \"mirrors\" for \"%s\" needs at least 1 arg"
 385            name))
 386       (webjump-choose-mirror name (cdr (append expr nil))))
 387      ((eq builtin 'name)
 388       name)
 389      ((eq builtin 'simple-query)
 390       (webjump-builtin-check-args expr name 3)
 391       (webjump-do-simple-query name (aref expr 1) (aref expr 2) (aref expr 3)))
 392      (t (error "WebJump URL builtin \"%s\" for \"%s\" invalid"
 393                builtin name)))))
 394
 395 (defun webjump-builtin-check-args (expr name count)
 396   (or (= (length expr) (1+ count))
 397       (error "WebJump URL builtin \"%s\" for \"%s\" needs %d args"
 398              (aref expr 0) name count)))
 399
 400 (defun webjump-choose-mirror (name urls)
 401   (webjump-read-url-choice (concat name " mirror")
 402                            urls
 403                            (webjump-mirror-default urls)))
 404
 405 (defun webjump-do-simple-query (name noquery-url query-prefix query-suffix)
 406   (let ((query (webjump-read-string (concat name " query"))))
 407     (if query
 408         (concat query-prefix (webjump-url-encode query) query-suffix)
 409       noquery-url)))
 410
 411 (defun webjump-mirror-default (urls)
 412   ;; Note: This should be modified to apply some simple kludges/heuristics to
 413   ;; pick a site which is likely "close".  As a tie-breaker among candidates
 414   ;; judged equally desirable, randomness might be used.
 415   (car urls))
 416
 417 (defun webjump-read-choice (name what choices &optional default)
 418   (let* ((completion-ignore-case t)
 419          (choice (completing-read (concat name " " what ": ") choices nil t)))
 420     (if (webjump-null-or-blank-string-p choice)
 421         default
 422       (cdr (assoc choice choices)))))
 423
 424 (defun webjump-read-number (prompt)
 425   ;; Note: I should make this more robust someday.
 426   (let ((input (webjump-read-string prompt)))
 427     (if input (string-to-number input))))
 428
 429 (defun webjump-read-string (prompt)
 430   (let ((input (read-string (concat prompt ": "))))
 431     (if (webjump-null-or-blank-string-p input) nil input)))
 432
 433 (defun webjump-read-url-choice (what urls &optional default)
 434   ;; Note: Convert this to use `webjump-read-choice' someday.
 435   (let* ((completions (mapcar (function (lambda (n) (cons n n)))
 436                               urls))
 437          (input (completing-read (concat what
 438                                          ;;(if default " (RET for default)" "")
 439                                          ": ")
 440                                  completions
 441                                  nil
 442                                  t)))
 443     (if (webjump-null-or-blank-string-p input)
 444         default
 445       (car (assoc input completions)))))
 446
 447 (defun webjump-null-or-blank-string-p (str)
 448   (or (null str) (string-match "^[ \t]*$" str)))
 449
 450 (defun webjump-url-encode (str)
 451   (mapconcat '(lambda (c)
 452                 (let ((s (char-to-string c)))
 453                   (cond ((string= s " ") "+")
 454                         ((string-match "[a-zA-Z_.-/]" s) s)
 455                         (t (upcase (format "%%%02x" c))))))
 456              (encode-coding-string str 'utf-8)
 457              ""))
 458
 459 (defun webjump-url-fix (url)
 460   (if (webjump-null-or-blank-string-p url)
 461       ""
 462     (webjump-url-fix-trailing-slash
 463      (cond
 464       ((string-match "^[a-zA-Z]+:" url) url)
 465       ((string-match "^/" url) (concat "file://" url))
 466       ((string-match "^\\([^\\./]+\\)" url)
 467        (concat (if (string= (downcase (match-string 1 url)) "ftp")
 468                    "ftp"
 469                  "http")
 470                "://"
 471                url))
 472       (t url)))))
 473
 474 (defun webjump-url-fix-trailing-slash (url)
 475   (if (string-match "^[a-zA-Z]+://[^/]+$" url)
 476       (concat url "/")
 477     url))
 478
 479 ;;-----------------------------------------------------------------------------
 480
 481 (provide 'webjump)
 482
 483 ;;; webjump.el ends here