mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-12 09:28:24 +00:00
070dd43909
* lisp/finder.el (finder-exit): Quit window instead of deleting. This restores previous contents of the window, if any, that was usurped by "C-h p" to show the list of packages.
485 lines
18 KiB
EmacsLisp
485 lines
18 KiB
EmacsLisp
;;; finder.el --- topic & keyword-based code finder
|
||
|
||
;; Copyright (C) 1992, 1997-1999, 2001-2019 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
;;; Commentary:
|
||
|
||
;; This mode uses the Keywords library header to provide code-finding
|
||
;; services by keyword.
|
||
|
||
;;; Code:
|
||
|
||
(require 'package)
|
||
(require 'lisp-mnt)
|
||
(require 'find-func) ;for find-library(-suffixes)
|
||
(require 'finder-inf nil t)
|
||
|
||
;; These are supposed to correspond to top-level customization groups,
|
||
;; says rms.
|
||
(defvar finder-known-keywords
|
||
'((abbrev . "abbreviation handling, typing shortcuts, and macros")
|
||
(bib . "bibliography processors")
|
||
(c . "C and related programming languages")
|
||
(calendar . "calendar and time management tools")
|
||
(comm . "communications, networking, and remote file access")
|
||
(convenience . "convenience features for faster editing")
|
||
(data . "editing data (non-text) files")
|
||
(docs . "Emacs documentation facilities")
|
||
(emulations . "emulations of other editors")
|
||
(extensions . "Emacs Lisp language extensions")
|
||
(faces . "fonts and colors for text")
|
||
(files . "file editing and manipulation")
|
||
(frames . "Emacs frames and window systems")
|
||
(games . "games, jokes and amusements")
|
||
(hardware . "interfacing with system hardware")
|
||
(help . "Emacs help systems")
|
||
(hypermedia . "links between text or other media types")
|
||
(i18n . "internationalization and 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 . "Emacs development tools and aids")
|
||
(mail . "email reading and posting")
|
||
(matching . "searching, matching, and sorting")
|
||
(mouse . "mouse support")
|
||
(multimedia . "images and sound")
|
||
(news . "USENET news reading and posting")
|
||
(outlines . "hierarchical outlining and note taking")
|
||
(processes . "processes, subshells, and compilation")
|
||
(terminals . "text terminals (ttys)")
|
||
(tex . "the TeX document formatter")
|
||
(tools . "programming tools")
|
||
(unix . "UNIX feature interfaces and emulators")
|
||
(vc . "version control")
|
||
(wp . "word processing"))
|
||
"Association list of the standard \"Keywords:\" headers.
|
||
Each element has the form (KEYWORD . DESCRIPTION).")
|
||
|
||
(defvar finder-mode-map
|
||
(let ((map (make-sparse-keymap))
|
||
(menu-map (make-sparse-keymap "Finder")))
|
||
(define-key map " " 'finder-select)
|
||
(define-key map "f" 'finder-select)
|
||
(define-key map [follow-link] 'mouse-face)
|
||
(define-key map [mouse-2] 'finder-mouse-select)
|
||
(define-key map "\C-m" 'finder-select)
|
||
(define-key map "?" 'finder-summary)
|
||
(define-key map "n" 'next-line)
|
||
(define-key map "p" 'previous-line)
|
||
(define-key map "q" 'finder-exit)
|
||
(define-key map "d" 'finder-list-keywords)
|
||
|
||
(define-key map [menu-bar finder-mode]
|
||
(cons "Finder" menu-map))
|
||
(define-key menu-map [finder-exit]
|
||
'(menu-item "Quit" finder-exit
|
||
:help "Exit Finder mode"))
|
||
(define-key menu-map [finder-summary]
|
||
'(menu-item "Summary" finder-summary
|
||
:help "Summary item on current line in a finder buffer"))
|
||
(define-key menu-map [finder-list-keywords]
|
||
'(menu-item "List keywords" finder-list-keywords
|
||
:help "Display descriptions of the keywords in the Finder buffer"))
|
||
(define-key menu-map [finder-select]
|
||
'(menu-item "Select" finder-select
|
||
:help "Select item on current line in a finder buffer"))
|
||
map)
|
||
"Keymap used in `finder-mode'.")
|
||
|
||
(defvar finder-mode-syntax-table
|
||
(let ((st (make-syntax-table emacs-lisp-mode-syntax-table)))
|
||
(modify-syntax-entry ?\; ". " st)
|
||
st)
|
||
"Syntax table used while in `finder-mode'.")
|
||
|
||
(defvar finder-headmark nil
|
||
"Internal Finder mode variable, local in Finder buffer.")
|
||
|
||
;;; Code for regenerating the keyword list.
|
||
|
||
(defvar finder-keywords-hash nil
|
||
"Hash table mapping keywords to lists of package names.
|
||
Keywords and package names both should be symbols.")
|
||
|
||
(defvar generated-finder-keywords-file "finder-inf.el"
|
||
"The function `finder-compile-keywords' writes keywords into this file.")
|
||
|
||
;; Skip autogenerated files, because they will never contain anything
|
||
;; useful, and because in parallel builds of Emacs they may get
|
||
;; modified while we are trying to read them.
|
||
;; https://lists.gnu.org/r/emacs-pretest-bug/2007-01/msg00469.html
|
||
;; ldefs-boot is not auto-generated, but has nothing useful.
|
||
(defvar finder-no-scan-regexp "\\(^\\.#\\|\\(loaddefs\\|ldefs-boot\\|\
|
||
cus-load\\|finder-inf\\|esh-groups\\|subdirs\\|leim-list\\)\\.el$\\)"
|
||
"Regexp matching file names not to scan for keywords.")
|
||
|
||
(autoload 'autoload-rubric "autoload")
|
||
|
||
(defconst finder--builtins-descriptions
|
||
;; I have no idea whether these are supposed to be capitalized
|
||
;; and/or end in a full-stop. Existing file headers are inconsistent,
|
||
;; but mainly seem to not do so.
|
||
'((emacs . "the extensible text editor")
|
||
(nxml . "a new XML mode"))
|
||
"Alist of built-in package descriptions.
|
||
Entries have the form (PACKAGE-SYMBOL . DESCRIPTION).
|
||
When generating `package--builtins', this overrides what the description
|
||
would otherwise be.")
|
||
|
||
(defvar finder--builtins-alist
|
||
'(("calc" . calc)
|
||
("ede" . ede)
|
||
("erc" . erc)
|
||
("eshell" . eshell)
|
||
("gnus" . gnus)
|
||
("international" . emacs)
|
||
("language" . emacs)
|
||
("mh-e" . mh-e)
|
||
("semantic" . semantic)
|
||
("analyze" . semantic)
|
||
("bovine" . semantic)
|
||
("decorate" . semantic)
|
||
("symref" . semantic)
|
||
("wisent" . semantic)
|
||
;; This should really be ("nxml" . nxml-mode), because nxml-mode.el
|
||
;; is the main file for the package. Then we would not need an
|
||
;; entry in finder--builtins-descriptions. But I do not know if
|
||
;; it is safe to change this, in case it is already in use.
|
||
("nxml" . nxml)
|
||
("org" . org)
|
||
("srecode" . srecode)
|
||
("term" . emacs)
|
||
("url" . url))
|
||
"Alist of built-in package directories.
|
||
Each element should have the form (DIR . PACKAGE), where DIR is a
|
||
directory name and PACKAGE is the name of a package (a symbol).
|
||
When generating `package--builtins', Emacs assumes any file in
|
||
DIR is part of the package PACKAGE.")
|
||
|
||
(defun finder-compile-keywords (&rest dirs)
|
||
"Regenerate list of built-in Emacs packages.
|
||
This recomputes `package--builtins' and `finder-keywords-hash',
|
||
and prints them into the file `generated-finder-keywords-file'.
|
||
|
||
Optional DIRS is a list of Emacs Lisp directories to compile
|
||
from; the default is `load-path'."
|
||
;; Allow compressed files also.
|
||
(setq package--builtins nil)
|
||
(setq finder-keywords-hash (make-hash-table :test 'eq))
|
||
(let* ((el-file-regexp "^\\([^=].*\\)\\.el\\(\\.\\(gz\\|Z\\)\\)?$")
|
||
(file-count 0)
|
||
(files (cl-loop for d in (or dirs load-path)
|
||
when (file-exists-p (directory-file-name d))
|
||
append (mapcar
|
||
(lambda (f)
|
||
(cons d f))
|
||
(directory-files d nil el-file-regexp))))
|
||
(progress (make-progress-reporter
|
||
(byte-compile-info-string "Scanning files for finder")
|
||
0 (length files)))
|
||
package-override base-name ; processed
|
||
summary keywords package version entry desc)
|
||
(dolist (elem files)
|
||
(let* ((d (car elem))
|
||
(f (cdr elem))
|
||
(package-override
|
||
(intern-soft
|
||
(cdr-safe
|
||
(assoc (file-name-nondirectory
|
||
(directory-file-name d))
|
||
finder--builtins-alist)))))
|
||
(progress-reporter-update progress (setq file-count (1+ file-count)))
|
||
(unless (or (string-match finder-no-scan-regexp f)
|
||
(null (setq base-name
|
||
(and (string-match el-file-regexp f)
|
||
(intern (match-string 1 f))))))
|
||
;; (memq base-name processed))
|
||
;; There are multiple files in the tree with the same
|
||
;; basename. So skipping files based on basename means you
|
||
;; randomly (depending on which order the files are
|
||
;; traversed in) miss some packages.
|
||
;; https://debbugs.gnu.org/14010
|
||
;; You might think this could lead to two files providing
|
||
;; the same package, but it does not, because the duplicates
|
||
;; are (at time of writing) all due to files in cedet, which
|
||
;; end up with package-override set. FIXME this is
|
||
;; obviously fragile. Make the (eq base-name package) case
|
||
;; below issue a warning if package-override is nil?
|
||
;; (push base-name processed)
|
||
(with-temp-buffer
|
||
(insert-file-contents (expand-file-name f d))
|
||
(setq keywords (mapcar 'intern (lm-keywords-list))
|
||
package (or package-override
|
||
(let ((str (lm-header "package")))
|
||
(if str (intern str)))
|
||
base-name)
|
||
summary (or (cdr
|
||
(assq package finder--builtins-descriptions))
|
||
(lm-synopsis))
|
||
version (lm-header "version")))
|
||
(when summary
|
||
(setq version (or (ignore-errors (version-to-list version))
|
||
(alist-get package package--builtin-versions)))
|
||
(setq entry (assq package package--builtins))
|
||
(cond ((null entry)
|
||
(push (cons package
|
||
(package-make-builtin version summary))
|
||
package--builtins))
|
||
;; The idea here is that eg calc.el gets to define
|
||
;; the description of the calc package.
|
||
;; This does not work for eg nxml-mode.el.
|
||
((or (eq base-name package) version)
|
||
(setq desc (cdr entry))
|
||
(aset desc 0 version)
|
||
(aset desc 2 summary)))
|
||
(dolist (kw keywords)
|
||
(puthash kw
|
||
(cons package
|
||
(delq package
|
||
(gethash kw finder-keywords-hash)))
|
||
finder-keywords-hash))))))
|
||
(progress-reporter-done progress))
|
||
(setq package--builtins
|
||
(sort package--builtins
|
||
(lambda (a b) (string< (symbol-name (car a))
|
||
(symbol-name (car b))))))
|
||
|
||
(with-current-buffer
|
||
(find-file-noselect generated-finder-keywords-file)
|
||
(setq buffer-undo-list t)
|
||
(erase-buffer)
|
||
(insert (autoload-rubric generated-finder-keywords-file
|
||
"keyword-to-package mapping" t))
|
||
(search-backward "")
|
||
;; FIXME: Now that we have package--builtin-versions, package--builtins is
|
||
;; only needed to get the list of unversioned packages and to get the
|
||
;; summary description of each package.
|
||
(insert "(setq package--builtins '(\n")
|
||
(dolist (package package--builtins)
|
||
(insert " ")
|
||
(prin1 package (current-buffer))
|
||
(insert "\n"))
|
||
(insert "))\n\n")
|
||
;; Insert hash table.
|
||
(insert "(setq finder-keywords-hash\n ")
|
||
(prin1 finder-keywords-hash (current-buffer))
|
||
(insert ")\n")
|
||
(basic-save-buffer)))
|
||
|
||
(defun finder-compile-keywords-make-dist ()
|
||
"Regenerate `finder-inf.el' for the Emacs distribution."
|
||
(apply 'finder-compile-keywords command-line-args-left)
|
||
(kill-emacs))
|
||
|
||
;;; Now the retrieval code
|
||
|
||
(defun finder-insert-at-column (column &rest strings)
|
||
"Insert, at column COLUMN, other args STRINGS."
|
||
(if (>= (current-column) column) (insert "\n"))
|
||
(move-to-column column t)
|
||
(apply 'insert strings))
|
||
|
||
(defvar finder-help-echo nil)
|
||
|
||
(defun finder-mouse-face-on-line ()
|
||
"Put `mouse-face' and `help-echo' properties on the previous line."
|
||
(save-excursion
|
||
(forward-line -1)
|
||
;; If finder-insert-at-column moved us to a new line, go back one more.
|
||
(if (looking-at "[ \t]") (forward-line -1))
|
||
(unless finder-help-echo
|
||
(setq finder-help-echo
|
||
(let* ((keys1 (where-is-internal 'finder-select
|
||
finder-mode-map))
|
||
(keys (nconc (where-is-internal
|
||
'finder-mouse-select finder-mode-map)
|
||
keys1)))
|
||
(concat (mapconcat 'key-description keys ", ")
|
||
": select item"))))
|
||
(add-text-properties
|
||
(line-beginning-position) (line-end-position)
|
||
'(mouse-face highlight
|
||
help-echo finder-help-echo))))
|
||
|
||
(defun finder-unknown-keywords ()
|
||
"Return an alist of unknown keywords and number of their occurrences.
|
||
Unknown keywords are those present in `finder-keywords-hash' but
|
||
not `finder-known-keywords'."
|
||
(let (alist)
|
||
(maphash (lambda (kw packages)
|
||
(unless (assq kw finder-known-keywords)
|
||
(push (cons kw (length packages)) alist)))
|
||
finder-keywords-hash)
|
||
(sort alist (lambda (a b) (string< (car a) (car b))))))
|
||
|
||
;;;###autoload
|
||
(defun finder-list-keywords ()
|
||
"Display descriptions of the keywords in the Finder buffer."
|
||
(interactive)
|
||
(if (get-buffer "*Finder*")
|
||
(pop-to-buffer "*Finder*")
|
||
(pop-to-buffer (get-buffer-create "*Finder*"))
|
||
(finder-mode)
|
||
(let ((inhibit-read-only t))
|
||
(erase-buffer)
|
||
(dolist (assoc finder-known-keywords)
|
||
(let ((keyword (car assoc)))
|
||
(insert (propertize (symbol-name keyword)
|
||
'font-lock-face 'font-lock-constant-face))
|
||
(finder-insert-at-column 14 (concat (cdr assoc) "\n"))
|
||
(finder-mouse-face-on-line)))
|
||
(goto-char (point-min))
|
||
(setq finder-headmark (point)
|
||
buffer-read-only t)
|
||
(set-buffer-modified-p nil)
|
||
(balance-windows)
|
||
(finder-summary))))
|
||
|
||
(defun finder-list-matches (key)
|
||
(let* ((id (intern key))
|
||
(packages (gethash id finder-keywords-hash)))
|
||
(unless packages
|
||
(error "No packages matching key `%s'" key))
|
||
(let ((package-list-unversioned t))
|
||
(package-show-package-list packages))))
|
||
|
||
(define-button-type 'finder-xref 'action #'finder-goto-xref)
|
||
|
||
(defun finder-goto-xref (button)
|
||
"Jump to a lisp file for the BUTTON at point."
|
||
(let* ((file (button-get button 'xref))
|
||
(lib (locate-library file)))
|
||
(if lib (finder-commentary lib)
|
||
(message "Unable to locate `%s'" file))))
|
||
|
||
;;;###autoload
|
||
(defun finder-commentary (file)
|
||
"Display FILE's commentary section.
|
||
FILE should be in a form suitable for passing to `locate-library'."
|
||
(interactive
|
||
(list
|
||
(completing-read "Library name: "
|
||
(apply-partially 'locate-file-completion-table
|
||
(or find-function-source-path load-path)
|
||
(find-library-suffixes)))))
|
||
(let ((str (lm-commentary (find-library-name file))))
|
||
(or str (error "Can't find any Commentary section"))
|
||
;; This used to use *Finder* but that would clobber the
|
||
;; directory of categories.
|
||
(pop-to-buffer "*Finder-package*")
|
||
(setq buffer-read-only nil
|
||
buffer-undo-list t)
|
||
(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))
|
||
(while (re-search-forward "\\<\\([-[:alnum:]]+\\.el\\)\\>" nil t)
|
||
(if (locate-library (match-string 1))
|
||
(make-text-button (match-beginning 1) (match-end 1)
|
||
'xref (match-string-no-properties 1)
|
||
'help-echo "Read this file's commentary"
|
||
:type 'finder-xref)))
|
||
(goto-char (point-min))
|
||
(setq buffer-read-only t)
|
||
(set-buffer-modified-p nil)
|
||
(shrink-window-if-larger-than-buffer)
|
||
(finder-mode)
|
||
(finder-summary)))
|
||
|
||
(defun finder-current-item ()
|
||
(let ((key (save-excursion
|
||
(beginning-of-line)
|
||
(current-word))))
|
||
(if (or (and finder-headmark (< (point) finder-headmark))
|
||
(zerop (length key)))
|
||
(error "No keyword or filename on this line")
|
||
key)))
|
||
|
||
(defun finder-select ()
|
||
"Select item on current line in a Finder buffer."
|
||
(interactive)
|
||
(let ((key (finder-current-item)))
|
||
(if (string-match "\\.el$" key)
|
||
(finder-commentary key)
|
||
(finder-list-matches key))))
|
||
|
||
(defun finder-mouse-select (event)
|
||
"Select item in a Finder buffer with the mouse."
|
||
(interactive "e")
|
||
(with-current-buffer (window-buffer (posn-window (event-start event)))
|
||
(goto-char (posn-point (event-start event)))
|
||
(finder-select)))
|
||
|
||
;;;###autoload
|
||
(defun finder-by-keyword ()
|
||
"Find packages matching a given keyword."
|
||
(interactive)
|
||
(finder-list-keywords))
|
||
|
||
(define-derived-mode finder-mode nil "Finder"
|
||
"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 kill the Finder buffer."
|
||
:syntax-table finder-mode-syntax-table
|
||
(setq buffer-read-only t
|
||
buffer-undo-list t)
|
||
(set (make-local-variable 'finder-headmark) nil))
|
||
|
||
(defun finder-summary ()
|
||
"Summarize basic Finder commands."
|
||
(interactive)
|
||
(message "%s"
|
||
(substitute-command-keys
|
||
"\\<finder-mode-map>\\[finder-select] = select, \
|
||
\\[finder-mouse-select] = select, \\[finder-list-keywords] = to \
|
||
finder directory, \\[finder-exit] = quit, \\[finder-summary] = help")))
|
||
|
||
(defun finder-exit ()
|
||
"Exit Finder mode.
|
||
Quit the window and kill all Finder-related buffers."
|
||
(interactive)
|
||
(let ((buf "*Finder*"))
|
||
(if (equal (current-buffer) buf)
|
||
(quit-window t)
|
||
(and (get-buffer buf) (kill-buffer buf)))))
|
||
|
||
(defun finder-unload-function ()
|
||
"Unload the Finder library."
|
||
(with-demoted-errors (unload-feature 'finder-inf t))
|
||
;; continue standard unloading
|
||
nil)
|
||
|
||
|
||
(provide 'finder)
|
||
|
||
;;; finder.el ends here
|