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;;; codesearch.el --- search for free software source code on the
;;; Internet from within Emacs via Google Code Search
;; Copyright (C) 2007 Juergen Hoetzel
;; Author: Juergen Hoetzel <>
;; Keywords: languages, tools, comm, docs
;; Version: 1.1
;; This file 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.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; codesearch.el is tested with GNU Emacs 22.1 on GNU/Linux and
;; Windows
;; The latest version of this package should be available from
;; <URL:>.
;; To use this mode, put codesearch.el somewhere on your load-path.
;; Then add this to your .emacs:
;; (require 'codesearch)
;;; ChangeLog:
;; 1.1
;; (codesearch): Fixed Error, when (current-word) returned nil
;; (codesearch): Added autoload "magic" comment
;; (codesearch-mode-to-lang): Code cleanup
;;; Code:
(provide 'codesearch)
(require 'cl)
(defvar codesearch-history nil "Google Code Search history.")
(defvar codesearch-valid-lang-list
'("ada" "applescript" "asp" "assembly" "basic" "c" "c++" "c#" "cobol"
"coldfusion" "d" "eiffel" "erlang" "fortran" "haskell" "java"
"javascript" "jsp" "lex" "lex" "limbo" "lisp" "lua" "makefile"
"mathematica" "matlab" "modula2" "modula3" "objectivec" "ocaml"
"pascal" "perl" "php" "prolog" "python" "r" "rebol" "ruby" "scheme"
"shell" "smalltalk" "sql" "sml" "tcl" "troff" "vhdl" "yacc")
"valid language filters supported by Google Code Search")
(defvar codesearch-special-chars (string-to-list "$^\\\[\](){}*+")
"Escape these character in querystring, because the have
special meaning as regular expression")
(defvar codesearch-url-format-string
"Format string for codesearch URL.")
(defun codesearch-mode-to-lang (mode)
"map emacs mode to variable in Code Search querystring (list is
far from complete)."
(case mode
((lisp-mode emacs-lisp-mode lisp-interaction-mode) "lisp")
(objc-mode "objectivec")
(sh-mode "shell")
(let ((mode-name (symbol-name mode)))
(if (and (string= (substring mode-name -5) "-mode")
(member (substring mode-name 0 -5) codesearch-valid-lang-list))
(substring mode-name 0 -5)
;; cannot map to valid language filter
(defun codesearch-re-escape (re)
"Looks for Code Search special characters and escape them, i.e. \\"
(regexp-opt-charset codesearch-special-chars) "\\\\\\&" re))
(defun codesearch(searchstring)
"Code Search current word, or with optional prefix arg, on
current region"
(let* ((default-entry
(if current-prefix-arg
(buffer-substring (region-beginning) (region-end))
(or (current-word) ""))))
"Code Search: " default-entry 'codesearch-history default-entry)))
(if (string= input "")
(error "No search string specified"))
(list input)))
;; identification of lang
(let* ((lang (codesearch-mode-to-lang major-mode))
(url (format codesearch-url-format-string searchstring lang)))
(require 'browse-url)
(browse-url url)))
;;; codesearch.el ends here