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- ;;; finder.el --- topic & keyword-based code finder
-
- ;; Copyright (C) 1992 Free Software Foundation, Inc.
-
- ;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
- ;; Created: 16 Jun 1992
- ;; Version: 1.0
- ;; Keywords: help
-
- ;; 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 1, 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:
-
- ;; This mode uses the Keywords library header to provide code-finding
- ;; services by keyword.
- ;;
- ;; Things to do:
- ;; 1. Support multiple keywords per search. This could be extremely hairy;
- ;; there doesn't seem to be any way to get completing-read to exit on
- ;; an EOL with no substring pending, which is what we'd want to end the loop.
- ;; 2. Search by string in synopsis line?
- ;; 3. Function to check finder-package-info for unknown keywords.
-
- ;;; Code:
-
- (require 'lisp-mnt)
- (require 'finder-inf)
- (require 'picture)
-
- ;; Local variable in finder buffer.
- (defvar finder-headmark)
-
- (defvar finder-known-keywords
- '(
- (abbrev . "abbreviation handling, typing shortcuts, macros")
- (bib . "code related to the bib(1) bibliography processor")
- (c . "C and C++ language support")
- (calendar . "calendar and time management support")
- (comm . "communications, networking, remote access to files")
- (docs . "support for Emacs documentation")
- (emulations . "emulations of other editors")
- (extensions . "Emacs Lisp language extensions")
- (games . "games, jokes and amusements")
- (hardware . "support for interfacing with exotic hardware")
- (help . "support for on-line help systems")
- (i18n . "internationalization and alternate character-set support")
- (internal . "code for Emacs internals, build process, defaults")
- (languages . "specialized modes for editing programming languages")
- (lisp . "Lisp support, including Emacs Lisp")
- (local . "code local to your site")
- (maint . "maintenance aids for the Emacs development group")
- (mail . "modes for electronic-mail handling")
- (news . "support for netnews reading and posting")
- (processes . "process, subshell, compilation, and job control support")
- (terminals . "support for terminal types")
- (tex . "code related to the TeX formatter")
- (tools . "programming tools")
- (unix . "front-ends/assistants for, or emulators of, UNIX features")
- (vms . "support code for vms")
- (wp . "word processing")
- ))
-
- (defvar finder-mode-map nil)
- ;(if finder-mode-map
- ; nil
- (setq finder-mode-map (make-sparse-keymap))
- (define-key finder-mode-map " " 'finder-select)
- (define-key finder-mode-map "?" 'finder-summary)
- (define-key finder-mode-map "q" 'finder-exit)
- (define-key finder-mode-map "f" 'finder-list-keywords)
- ; )
-
- ;;; Code for regenerating the keyword list.
-
- (defvar finder-package-info nil
- "Assoc list mapping file names to description & keyword lists.")
-
- (defun finder-compile-keywords (&rest dirs)
- "Regenerate the keywords association list into the file `finder-inf.el'.
- Optional arguments are a list of Emacs Lisp directories to compile from; no
- arguments compiles from `load-path'."
- (save-excursion
- (let ((processed nil))
- (find-file "finder-inf.el")
- (erase-buffer)
- (insert ";;; finder-inf.el --- keyword-to-package mapping\n")
- (insert ";; Keywords: help\n")
- (insert ";;; Commentary:\n")
- (insert ";; Don't edit this file. It's generated by finder.el\n\n")
- (insert ";;; Code:\n")
- (insert "\n(setq finder-package-info '(\n")
- (mapcar
- (function
- (lambda (d)
- (mapcar
- (function
- (lambda (f)
- (if (and (string-match "^[^=].*\\.el$" f)
- (not (member f processed)))
- (let (summary keystart keywords)
- (setq processed (cons f processed))
- (save-excursion
- (set-buffer (get-buffer-create "*finder-scratch*"))
- (buffer-disable-undo (current-buffer))
- (erase-buffer)
- (insert-file-contents
- (concat (file-name-as-directory (or d ".")) f))
- (setq summary (lm-synopsis))
- (setq keywords (lm-keywords)))
- (insert
- (format " (\"%s\"\n " f))
- (prin1 summary (current-buffer))
- (insert
- "\n ")
- (setq keystart (point))
- (insert
- (if keywords (format "(%s)" keywords) "nil")
- ")\n")
- (subst-char-in-region keystart (point) ?, ? )
- )
- )))
- (directory-files (or d ".")))
- ))
- (or dirs load-path))
- (insert "))\n\n(provide 'finder-inf)\n\n;;; finder-inf.el ends here\n")
- (kill-buffer "*finder-scratch*")
- (eval-current-buffer) ;; So we get the new keyword list immediately
- (basic-save-buffer)
- )))
-
- ;;; Now the retrieval code
-
- (defun finder-list-keywords ()
- "Display descriptions of the keywords in the Finder buffer."
- (interactive)
- (setq buffer-read-only nil)
- (erase-buffer)
- (mapcar
- (function (lambda (assoc)
- (let ((keyword (car assoc)))
- (insert (symbol-name keyword))
- (insert-at-column 14 (concat (cdr assoc) "\n"))
- (cons (symbol-name keyword) keyword))))
- finder-known-keywords)
- (goto-char (point-min))
- (setq finder-headmark (point))
- (setq buffer-read-only t)
- (set-buffer-modified-p nil)
- (balance-windows)
- (finder-summary))
-
- (defun finder-list-matches (key)
- (setq buffer-read-only nil)
- (erase-buffer)
- (let ((id (intern key)))
- (insert
- "The following packages match the keyword `" key "':\n\n")
- (setq finder-headmark (point))
- (mapcar
- (function (lambda (x)
- (if (memq id (car (cdr (cdr x))))
- (progn
- (insert (car x))
- (insert-at-column 16
- (concat (car (cdr x)) "\n"))
- ))
- ))
- finder-package-info)
- (goto-char (point-min))
- (forward-line)
- (setq buffer-read-only t)
- (set-buffer-modified-p nil)
- (shrink-window-if-larger-than-buffer)
- (finder-summary)))
-
- ;; Search for a file named FILE the same way `load' would search.
- (defun finder-find-library (file)
- (if (file-name-absolute-p file)
- file
- (let ((dirs load-path)
- found)
- (while (and dirs (not found))
- (if (file-exists-p (expand-file-name (concat file ".el") (car dirs)))
- (setq found (expand-file-name file (car dirs)))
- (if (file-exists-p (expand-file-name file (car dirs)))
- (setq found (expand-file-name file (car dirs)))))
- (setq dirs (cdr dirs)))
- found)))
-
- (defun finder-commentary (file)
- (interactive)
- (let* ((str (lm-commentary (finder-find-library file))))
- (if (null str)
- (error "Can't find any Commentary section."))
- (pop-to-buffer "*Finder*")
- (setq buffer-read-only nil)
- (erase-buffer)
- (insert str)
- (goto-char (point-min))
- (delete-blank-lines)
- (goto-char (point-max))
- (delete-blank-lines)
- (goto-char (point-min))
- (while (re-search-forward "^;+ ?" nil t)
- (replace-match "" nil nil))
- (goto-char (point-min))
- (setq buffer-read-only t)
- (set-buffer-modified-p nil)
- (shrink-window-if-larger-than-buffer)
- (finder-summary)
- ))
-
- (defun finder-current-item ()
- (if (and finder-headmark (< (point) finder-headmark))
- (error "No keyword or filename on this line")
- (save-excursion
- (beginning-of-line)
- (current-word))))
-
- (defun finder-select ()
- (interactive)
- (let ((key (finder-current-item)))
- (if (string-match "\\.el$" key)
- (finder-commentary key)
- (finder-list-matches key))))
-
- (defun finder-by-keyword ()
- "Find packages matching a given keyword."
- (interactive)
- (finder-mode)
- (finder-list-keywords))
-
- (defun finder-mode ()
- "Major mode for browsing package documentation.
- \\<finder-mode-map>
- \\[finder-select] more help for the item on the current line
- \\[finder-exit] exit Finder mode and fill the Finder buffer.
- "
- (interactive)
- (pop-to-buffer "*Finder*")
- (setq buffer-read-only nil)
- (erase-buffer)
- (use-local-map finder-mode-map)
- (set-syntax-table emacs-lisp-mode-syntax-table)
- (setq mode-name "Finder")
- (setq major-mode 'finder-mode)
- (make-local-variable 'finder-headmark)
- (setq finder-headmark nil)
- )
-
- (defun finder-summary ()
- "Summarize basic Finder commands."
- (interactive)
- (message
- (substitute-command-keys
- "\\<finder-mode-map>\\[finder-select] = select, \\[finder-list-keywords] = back to finder, \\[finder-exit] = quit, \\[finder-summary] = help")))
-
- (defun finder-exit ()
- "Exit Finder mode and kill the buffer"
- (interactive)
- (delete-window)
- (kill-buffer "*Finder*"))
-
- (provide 'finder)
-
- ;;; finder.el ends here
-