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1705 lines
60 KiB
EmacsLisp
1705 lines
60 KiB
EmacsLisp
;;; info.el --- info package for Emacs.
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;; Copyright (C) 1985, 1986, 1992, 1993, 1994 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: help
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;;; Note that nowadays we expect info files to be made using makeinfo.
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;;; Code:
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(defvar Info-history nil
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"List of info nodes user has visited.
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Each element of list is a list (FILENAME NODENAME BUFFERPOS).")
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(defvar Info-enable-edit nil
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"*Non-nil means the \\<Info-mode-map>\\[Info-edit] command in Info can edit the current node.
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This is convenient if you want to write info files by hand.
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However, we recommend that you not do this.
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It is better to write a Texinfo file and generate the Info file from that,
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because that gives you a printed manual as well.")
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(defvar Info-enable-active-nodes t
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"Non-nil allows Info to execute Lisp code associated with nodes.
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The Lisp code is executed when the node is selected.")
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(defvar Info-default-directory-list nil
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"List of default directories to search for Info documentation files.
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This value is used as the default for `Info-directory-list'. It is set
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in paths.el.")
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(defvar Info-fontify t
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"*Non-nil enables highlighting and fonts in Info nodes.")
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(defvar Info-fontify-maximum-menu-size 30000
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"*Maximum size of menu to fontify if `Info-fontify' is non-nil.")
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(defvar Info-directory-list
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(let ((path (getenv "INFOPATH"))
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;; This is for older Emacs versions
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;; which might get this info.el from the Texinfo distribution.
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(path-separator (if (boundp 'path-separator) path-separator
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(if (eq system-type 'ms-dos) ";" ":")))
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(sibling (if installation-directory
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(expand-file-name "info/" installation-directory))))
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(if path
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(let ((list nil)
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idx)
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(while (> (length path) 0)
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(setq idx (or (string-match path-separator path) (length path))
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list (cons (substring path 0 idx) list)
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path (substring path (min (1+ idx)
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(length path)))))
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(nreverse list))
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(if (or (null sibling)
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(member sibling Info-default-directory-list)
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(not (file-exists-p sibling))
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;; On DOS/NT, we use movable executables always,
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;; and we must always find the Info dir at run time.
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(if (or (eq system-type 'ms-dos) (eq system-type 'windows-nt))
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nil
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;; Use invocation-directory for Info only if we used it for
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;; exec-directory also.
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(not (string= exec-directory
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(expand-file-name "lib-src/"
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installation-directory)))))
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Info-default-directory-list
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(reverse (cons sibling (cdr (reverse Info-default-directory-list)))))))
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"List of directories to search for Info documentation files.
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nil means not yet initialized. In this case, Info uses the environment
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variable INFOPATH to initialize it, or `Info-default-directory-list'
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if there is no INFOPATH variable in the environment.
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The last element of `Info-default-directory-list' is the directory
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where Emacs installs the Info files that come with it.
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If you run the Emacs executable from the `src' directory in the Emacs
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source tree, the `info' directory in the source tree is used as the last
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element, in place of the installation Info directory. This is useful
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when you run a version of Emacs without installing it.")
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(defvar Info-additional-directory-list nil
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"List of additional directories to search for Info documentation files.
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These directories are not searched for merging the `dir' file.")
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(defvar Info-current-file nil
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"Info file that Info is now looking at, or nil.")
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(defvar Info-current-subfile nil
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"Info subfile that is actually in the *info* buffer now,
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or nil if current info file is not split into subfiles.")
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(defvar Info-current-node nil
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"Name of node that Info is now looking at, or nil.")
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(defvar Info-tag-table-marker (make-marker)
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"Marker pointing at beginning of current Info file's tag table.
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Marker points nowhere if file has no tag table.")
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(defvar Info-current-file-completions nil
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"Cached completion list for current Info file.")
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(defvar Info-index-alternatives nil
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"List of possible matches for last Info-index command.")
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(defvar Info-standalone nil
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"Non-nil if Emacs was started solely as an Info browser.")
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(defvar Info-suffix-list '( (".info.Z" . "uncompress")
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(".info.Y" . "unyabba")
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(".info.gz" . "gunzip")
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(".info.z" . "gunzip")
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(".info" . nil)
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(".Z" . "uncompress")
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(".Y" . "unyabba")
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(".gz" . "gunzip")
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(".z" . "gunzip")
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("" . nil))
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"List of file name suffixes and associated decoding commands.
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Each entry should be (SUFFIX . STRING); the file is given to
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the command as standard input. If STRING is nil, no decoding is done.
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Because the SUFFIXes are tried in order, the empty string should
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be last in the list.")
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(defun info-insert-file-contents (filename &optional visit)
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"Insert the contents of an info file in the current buffer.
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Do the right thing if the file has been compressed or zipped."
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(let ((tail Info-suffix-list)
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fullname decoder)
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(if (file-exists-p filename)
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(progn
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(while (and tail
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(not (string-match
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(concat (regexp-quote (car (car tail))) "$")
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filename)))
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(setq tail (cdr tail)))
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(setq fullname filename
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decoder (cdr (car tail))))
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(while (and tail
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(not (file-exists-p (concat filename (car (car tail))))))
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(setq tail (cdr tail)))
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(setq fullname (concat filename (car (car tail)))
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decoder (cdr (car tail)))
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(or tail
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(error "Can't find %s or any compressed version of it!" filename)))
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;; check for conflict with jka-compr
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(if (and (featurep 'jka-compr)
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(jka-compr-installed-p)
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(jka-compr-get-compression-info fullname))
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(setq decoder nil))
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(insert-file-contents fullname visit)
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(if decoder
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(let ((buffer-read-only nil)
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(default-directory (or (file-name-directory fullname)
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default-directory)))
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(shell-command-on-region (point-min) (point-max) decoder t)))))
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;;;###autoload (add-hook 'same-window-buffer-names "*info*")
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;;;###autoload
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(defun info (&optional file)
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"Enter Info, the documentation browser.
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Optional argument FILE specifies the file to examine;
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the default is the top-level directory of Info.
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In interactive use, a prefix argument directs this command
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to read a file name from the minibuffer."
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(interactive (if current-prefix-arg
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(list (read-file-name "Info file name: " nil nil t))))
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(if file
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(Info-goto-node (concat "(" file ")"))
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(if (get-buffer "*info*")
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(pop-to-buffer "*info*")
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(Info-directory))))
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;;;###autoload
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(defun info-standalone ()
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"Run Emacs as a standalone Info reader.
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Usage: emacs -f info-standalone [filename]
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In standalone mode, \\<Info-mode-map>\\[Info-exit] exits Emacs itself."
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(setq Info-standalone t)
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(if (and command-line-args-left
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(not (string-match "^-" (car command-line-args-left))))
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(condition-case err
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(progn
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(info (car command-line-args-left))
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(setq command-line-args-left (cdr command-line-args-left)))
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(error (send-string-to-terminal
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(format "%s\n" (if (eq (car-safe err) 'error)
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(nth 1 err) err)))
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(save-buffers-kill-emacs)))
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(info)))
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;; Go to an info node specified as separate filename and nodename.
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;; no-going-back is non-nil if recovering from an error in this function;
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;; it says do not attempt further (recursive) error recovery.
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(defun Info-find-node (filename nodename &optional no-going-back)
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;; Convert filename to lower case if not found as specified.
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;; Expand it.
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(if filename
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(let (temp temp-downcase found)
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(setq filename (substitute-in-file-name filename))
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(if (string= (downcase (file-name-nondirectory filename)) "dir")
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(setq found t)
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(let ((dirs (if (string-match "^\\./" filename)
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;; If specified name starts with `./'
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;; then just try current directory.
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'("./")
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(if (file-name-absolute-p filename)
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;; No point in searching for an
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;; absolute file name
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'(nil)
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(if Info-additional-directory-list
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(append Info-directory-list
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Info-additional-directory-list)
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Info-directory-list)))))
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;; Search the directory list for file FILENAME.
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(while (and dirs (not found))
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(setq temp (expand-file-name filename (car dirs)))
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(setq temp-downcase
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(expand-file-name (downcase filename) (car dirs)))
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;; Try several variants of specified name.
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(let ((suffix-list Info-suffix-list))
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(while (and suffix-list (not found))
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(cond ((file-exists-p
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(concat temp (car (car suffix-list))))
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(setq found temp))
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((file-exists-p
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(concat temp-downcase (car (car suffix-list))))
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(setq found temp-downcase)))
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(setq suffix-list (cdr suffix-list))))
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(setq dirs (cdr dirs)))))
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(if found
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(setq filename found)
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(error "Info file %s does not exist" filename))))
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;; Record the node we are leaving.
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(if (and Info-current-file (not no-going-back))
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(setq Info-history
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(cons (list Info-current-file Info-current-node (point))
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Info-history)))
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;; Go into info buffer.
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(switch-to-buffer "*info*")
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(buffer-disable-undo (current-buffer))
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(or (eq major-mode 'Info-mode)
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(Info-mode))
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(widen)
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(setq Info-current-node nil)
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(unwind-protect
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(progn
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;; Switch files if necessary
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(or (null filename)
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(equal Info-current-file filename)
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(let ((buffer-read-only nil))
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(setq Info-current-file nil
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Info-current-subfile nil
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Info-current-file-completions nil
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Info-index-alternatives nil
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buffer-file-name nil)
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(erase-buffer)
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(if (eq filename t)
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(Info-insert-dir)
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(info-insert-file-contents filename t)
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(setq default-directory (file-name-directory filename)))
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(set-buffer-modified-p nil)
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;; See whether file has a tag table. Record the location if yes.
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(set-marker Info-tag-table-marker nil)
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(goto-char (point-max))
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(forward-line -8)
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;; Use string-equal, not equal, to ignore text props.
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(or (string-equal nodename "*")
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(not (search-forward "\^_\nEnd tag table\n" nil t))
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(let (pos)
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;; We have a tag table. Find its beginning.
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;; Is this an indirect file?
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(search-backward "\nTag table:\n")
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(setq pos (point))
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(if (save-excursion
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(forward-line 2)
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(looking-at "(Indirect)\n"))
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;; It is indirect. Copy it to another buffer
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;; and record that the tag table is in that buffer.
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(save-excursion
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(let ((buf (current-buffer)))
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(set-buffer (get-buffer-create " *info tag table*"))
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(buffer-disable-undo (current-buffer))
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(setq case-fold-search t)
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(erase-buffer)
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(insert-buffer-substring buf)
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(set-marker Info-tag-table-marker
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(match-end 0))))
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(set-marker Info-tag-table-marker pos))))
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(setq Info-current-file
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(if (eq filename t) "dir"
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(file-name-sans-versions buffer-file-name)))))
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;; Use string-equal, not equal, to ignore text props.
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(if (string-equal nodename "*")
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(progn (setq Info-current-node nodename)
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(Info-set-mode-line))
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;; Search file for a suitable node.
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(let ((guesspos (point-min))
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(regexp (concat "Node: *" (regexp-quote nodename) " *[,\t\n\177]")))
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;; First get advice from tag table if file has one.
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;; Also, if this is an indirect info file,
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;; read the proper subfile into this buffer.
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(if (marker-position Info-tag-table-marker)
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(save-excursion
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(set-buffer (marker-buffer Info-tag-table-marker))
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(goto-char Info-tag-table-marker)
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(if (re-search-forward regexp nil t)
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(progn
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(setq guesspos (read (current-buffer)))
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;; If this is an indirect file,
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;; determine which file really holds this node
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;; and read it in.
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(if (not (eq (current-buffer) (get-buffer "*info*")))
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(setq guesspos
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(Info-read-subfile guesspos))))
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(error "No such node: \"%s\"" nodename))))
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(goto-char (max (point-min) (- guesspos 1000)))
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;; Now search from our advised position (or from beg of buffer)
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;; to find the actual node.
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(catch 'foo
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(while (search-forward "\n\^_" nil t)
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(forward-line 1)
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(let ((beg (point)))
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(forward-line 1)
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(if (re-search-backward regexp beg t)
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(throw 'foo t))))
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(error "No such node: %s" nodename)))
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(Info-select-node)))
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;; If we did not finish finding the specified node,
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;; go back to the previous one.
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(or Info-current-node no-going-back (null Info-history)
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(let ((hist (car Info-history)))
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(setq Info-history (cdr Info-history))
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(Info-find-node (nth 0 hist) (nth 1 hist) t)
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(goto-char (nth 2 hist)))))
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(goto-char (point-min)))
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;; Cache the contents of the (virtual) dir file, once we have merged
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;; it for the first time, so we can save time subsequently.
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(defvar Info-dir-contents nil)
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;; Cache for the directory we decided to use for the default-directory
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;; of the merged dir text.
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(defvar Info-dir-contents-directory nil)
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;; Record the file attributes of all the files from which we
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;; constructed Info-dir-contents.
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(defvar Info-dir-file-attributes nil)
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;; Construct the Info directory node by merging the files named `dir'
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;; from various directories. Set the *info* buffer's
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;; default-directory to the first directory we actually get any text
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;; from.
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(defun Info-insert-dir ()
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(if (and Info-dir-contents Info-dir-file-attributes
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;; Verify that none of the files we used has changed
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;; since we used it.
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(eval (cons 'and
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(mapcar '(lambda (elt)
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(let ((curr (file-attributes (car elt))))
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;; Don't compare the access time.
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(if curr (setcar (nthcdr 4 curr) 0))
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(setcar (nthcdr 4 (cdr elt)) 0)
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(equal (cdr elt) curr)))
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Info-dir-file-attributes))))
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(insert Info-dir-contents)
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(let ((dirs Info-directory-list)
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buffers buffer others nodes dirs-done)
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(setq Info-dir-file-attributes nil)
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;; Search the directory list for the directory file.
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(while dirs
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(let ((truename (file-truename (expand-file-name (car dirs)))))
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(or (member truename dirs-done)
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(member (directory-file-name truename) dirs-done)
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;; Try several variants of specified name.
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;; Try upcasing, appending `.info', or both.
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(let* (file
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(attrs
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(or
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(progn (setq file (expand-file-name "dir" truename))
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(file-attributes file))
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(progn (setq file (expand-file-name "DIR" truename))
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(file-attributes file))
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(progn (setq file (expand-file-name "dir.info" truename))
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(file-attributes file))
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(progn (setq file (expand-file-name "DIR.INFO" truename))
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(file-attributes file)))))
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(setq dirs-done
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(cons truename
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(cons (directory-file-name truename)
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dirs-done)))
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(if attrs
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(save-excursion
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(or buffers
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(message "Composing main Info directory..."))
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(set-buffer (generate-new-buffer "info dir"))
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(insert-file-contents file)
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(setq buffers (cons (current-buffer) buffers)
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Info-dir-file-attributes
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(cons (cons file attrs)
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Info-dir-file-attributes))))))
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(setq dirs (cdr dirs))))
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(or buffers
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(error "Can't find the info directory node"))
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;; Distinguish the dir file that comes with Emacs from all the
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;; others. Yes, that is really what this is supposed to do.
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||
;; If it doesn't work, fix it.
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(setq buffer (car buffers)
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others (cdr buffers))
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;; Insert the entire original dir file as a start; use its
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;; default directory as the default directory for the whole
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;; concatenation.
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(insert-buffer buffer)
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(setq Info-dir-contents-directory (save-excursion
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(set-buffer buffer)
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default-directory))
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;; Look at each of the other buffers one by one.
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(while others
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(let ((other (car others)))
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;; In each, find all the menus.
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||
(save-excursion
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||
(set-buffer other)
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(goto-char (point-min))
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;; Find each menu, and add an elt to NODES for it.
|
||
(while (re-search-forward "^\\* Menu:" nil t)
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||
(let (beg nodename end)
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||
(forward-line 1)
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(setq beg (point))
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(search-backward "\n\^_")
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(search-forward "Node: ")
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(setq nodename (Info-following-node-name))
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(search-forward "\n\^_" nil 'move)
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(beginning-of-line)
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(setq end (point))
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(setq nodes (cons (list nodename other beg end) nodes))))))
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||
(setq others (cdr others)))
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||
;; Add to the main menu a menu item for each other node.
|
||
(re-search-forward "^\\* Menu:")
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||
(forward-line 1)
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||
(let ((menu-items '("top"))
|
||
(nodes nodes)
|
||
(case-fold-search t)
|
||
(end (save-excursion (search-forward "\^_" nil t) (point))))
|
||
(while nodes
|
||
(let ((nodename (car (car nodes))))
|
||
(save-excursion
|
||
(or (member (downcase nodename) menu-items)
|
||
(re-search-forward (concat "^\\* "
|
||
(regexp-quote nodename)
|
||
"::")
|
||
end t)
|
||
(progn
|
||
(insert "* " nodename "::" "\n")
|
||
(setq menu-items (cons nodename menu-items))))))
|
||
(setq nodes (cdr nodes))))
|
||
;; Now take each node of each of the other buffers
|
||
;; and merge it into the main buffer.
|
||
(while nodes
|
||
(let ((nodename (car (car nodes))))
|
||
(goto-char (point-min))
|
||
;; Find the like-named node in the main buffer.
|
||
(if (re-search-forward (concat "\n\^_.*\n.*Node: "
|
||
(regexp-quote nodename)
|
||
"[,\n\t]")
|
||
nil t)
|
||
(progn
|
||
(search-forward "\n\^_" nil 'move)
|
||
(beginning-of-line)
|
||
(insert "\n"))
|
||
;; If none exists, add one.
|
||
(goto-char (point-max))
|
||
(insert "\^_\nFile: dir\tNode: " nodename "\n\n* Menu:\n\n"))
|
||
;; Merge the text from the other buffer's menu
|
||
;; into the menu in the like-named node in the main buffer.
|
||
(apply 'insert-buffer-substring (cdr (car nodes))))
|
||
(setq nodes (cdr nodes)))
|
||
;; Kill all the buffers we just made.
|
||
(while buffers
|
||
(kill-buffer (car buffers))
|
||
(setq buffers (cdr buffers)))
|
||
(message "Composing main Info directory...done"))
|
||
(setq Info-dir-contents (buffer-string)))
|
||
(setq default-directory Info-dir-contents-directory))
|
||
|
||
(defun Info-read-subfile (nodepos)
|
||
(set-buffer (marker-buffer Info-tag-table-marker))
|
||
(goto-char (point-min))
|
||
(search-forward "\n\^_")
|
||
(let (lastfilepos
|
||
lastfilename)
|
||
(forward-line 2)
|
||
(catch 'foo
|
||
(while (not (looking-at "\^_"))
|
||
(if (not (eolp))
|
||
(let ((beg (point))
|
||
thisfilepos thisfilename)
|
||
(search-forward ": ")
|
||
(setq thisfilename (buffer-substring beg (- (point) 2)))
|
||
(setq thisfilepos (read (current-buffer)))
|
||
;; read in version 19 stops at the end of number.
|
||
;; Advance to the next line.
|
||
(forward-line 1)
|
||
(if (> thisfilepos nodepos)
|
||
(throw 'foo t))
|
||
(setq lastfilename thisfilename)
|
||
(setq lastfilepos thisfilepos))
|
||
(forward-line 1))))
|
||
(set-buffer (get-buffer "*info*"))
|
||
(or (equal Info-current-subfile lastfilename)
|
||
(let ((buffer-read-only nil))
|
||
(setq buffer-file-name nil)
|
||
(widen)
|
||
(erase-buffer)
|
||
(info-insert-file-contents lastfilename)
|
||
(set-buffer-modified-p nil)
|
||
(setq Info-current-subfile lastfilename)))
|
||
(goto-char (point-min))
|
||
(search-forward "\n\^_")
|
||
(+ (- nodepos lastfilepos) (point))))
|
||
|
||
;; Select the info node that point is in.
|
||
(defun Info-select-node ()
|
||
(save-excursion
|
||
;; Find beginning of node.
|
||
(search-backward "\n\^_")
|
||
(forward-line 2)
|
||
;; Get nodename spelled as it is in the node.
|
||
(re-search-forward "Node:[ \t]*")
|
||
(setq Info-current-node
|
||
(buffer-substring (point)
|
||
(progn
|
||
(skip-chars-forward "^,\t\n")
|
||
(point))))
|
||
(Info-set-mode-line)
|
||
;; Find the end of it, and narrow.
|
||
(beginning-of-line)
|
||
(let (active-expression)
|
||
(narrow-to-region (point)
|
||
(if (re-search-forward "\n[\^_\f]" nil t)
|
||
(prog1
|
||
(1- (point))
|
||
(if (looking-at "[\n\^_\f]*execute: ")
|
||
(progn
|
||
(goto-char (match-end 0))
|
||
(setq active-expression
|
||
(read (current-buffer))))))
|
||
(point-max)))
|
||
(if Info-enable-active-nodes (eval active-expression))
|
||
(if Info-fontify (Info-fontify-node))
|
||
(run-hooks 'Info-selection-hook))))
|
||
|
||
(defun Info-set-mode-line ()
|
||
(setq mode-line-buffer-identification
|
||
(concat
|
||
"Info: ("
|
||
(if Info-current-file
|
||
(file-name-nondirectory Info-current-file)
|
||
"")
|
||
")"
|
||
(or Info-current-node ""))))
|
||
|
||
;; Go to an info node specified with a filename-and-nodename string
|
||
;; of the sort that is found in pointers in nodes.
|
||
|
||
(defun Info-goto-node (nodename)
|
||
"Go to info node named NAME. Give just NODENAME or (FILENAME)NODENAME."
|
||
(interactive (list (Info-read-node-name "Goto node: ")))
|
||
(let (filename)
|
||
(string-match "\\s *\\((\\s *\\([^\t)]*\\)\\s *)\\s *\\|\\)\\(.*\\)"
|
||
nodename)
|
||
(setq filename (if (= (match-beginning 1) (match-end 1))
|
||
""
|
||
(substring nodename (match-beginning 2) (match-end 2)))
|
||
nodename (substring nodename (match-beginning 3) (match-end 3)))
|
||
(let ((trim (string-match "\\s *\\'" filename)))
|
||
(if trim (setq filename (substring filename 0 trim))))
|
||
(let ((trim (string-match "\\s *\\'" nodename)))
|
||
(if trim (setq nodename (substring nodename 0 trim))))
|
||
(if transient-mark-mode (deactivate-mark))
|
||
(Info-find-node (if (equal filename "") nil filename)
|
||
(if (equal nodename "") "Top" nodename))))
|
||
|
||
(defun Info-read-node-name (prompt &optional default)
|
||
(let* ((completion-ignore-case t)
|
||
(nodename (completing-read prompt (Info-build-node-completions))))
|
||
(if (equal nodename "")
|
||
(or default
|
||
(Info-read-node-name prompt))
|
||
nodename)))
|
||
|
||
(defun Info-build-node-completions ()
|
||
(or Info-current-file-completions
|
||
(let ((compl nil))
|
||
(save-excursion
|
||
(save-restriction
|
||
(if (marker-buffer Info-tag-table-marker)
|
||
(progn
|
||
(set-buffer (marker-buffer Info-tag-table-marker))
|
||
(widen)
|
||
(goto-char Info-tag-table-marker)
|
||
(while (re-search-forward "\nNode: \\(.*\\)\177" nil t)
|
||
(setq compl
|
||
(cons (list (buffer-substring (match-beginning 1)
|
||
(match-end 1)))
|
||
compl))))
|
||
(widen)
|
||
(goto-char (point-min))
|
||
(while (search-forward "\n\^_" nil t)
|
||
(forward-line 1)
|
||
(let ((beg (point)))
|
||
(forward-line 1)
|
||
(if (re-search-backward "Node: *\\([^,\n]*\\) *[,\n\t]"
|
||
beg t)
|
||
(setq compl
|
||
(cons (list (buffer-substring (match-beginning 1)
|
||
(match-end 1)))
|
||
compl))))))))
|
||
(setq Info-current-file-completions compl))))
|
||
|
||
(defun Info-restore-point (hl)
|
||
"If this node has been visited, restore the point value when we left."
|
||
(while hl
|
||
(if (and (equal (nth 0 (car hl)) Info-current-file)
|
||
;; Use string-equal, not equal, to ignore text props.
|
||
(string-equal (nth 1 (car hl)) Info-current-node))
|
||
(progn
|
||
(goto-char (nth 2 (car hl)))
|
||
(setq hl nil)) ;terminate the while at next iter
|
||
(setq hl (cdr hl)))))
|
||
|
||
(defvar Info-last-search nil
|
||
"Default regexp for \\<Info-mode-map>\\[Info-search] command to search for.")
|
||
|
||
(defun Info-search (regexp)
|
||
"Search for REGEXP, starting from point, and select node it's found in."
|
||
(interactive "sSearch (regexp): ")
|
||
(if transient-mark-mode (deactivate-mark))
|
||
(if (equal regexp "")
|
||
(setq regexp Info-last-search)
|
||
(setq Info-last-search regexp))
|
||
(let ((found ()) current
|
||
(onode Info-current-node)
|
||
(ofile Info-current-file)
|
||
(opoint (point))
|
||
(osubfile Info-current-subfile))
|
||
(save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(if (null Info-current-subfile)
|
||
(progn (re-search-forward regexp) (setq found (point)))
|
||
(condition-case err
|
||
(progn (re-search-forward regexp) (setq found (point)))
|
||
(search-failed nil)))))
|
||
(if (not found) ;can only happen in subfile case -- else would have erred
|
||
(unwind-protect
|
||
(let ((list ()))
|
||
(set-buffer (marker-buffer Info-tag-table-marker))
|
||
(goto-char (point-min))
|
||
(search-forward "\n\^_\nIndirect:")
|
||
(save-restriction
|
||
(narrow-to-region (point)
|
||
(progn (search-forward "\n\^_")
|
||
(1- (point))))
|
||
(goto-char (point-min))
|
||
(search-forward (concat "\n" osubfile ": "))
|
||
(beginning-of-line)
|
||
(while (not (eobp))
|
||
(re-search-forward "\\(^.*\\): [0-9]+$")
|
||
(goto-char (+ (match-end 1) 2))
|
||
(setq list (cons (cons (read (current-buffer))
|
||
(buffer-substring (match-beginning 1)
|
||
(match-end 1)))
|
||
list))
|
||
(goto-char (1+ (match-end 0))))
|
||
(setq list (nreverse list)
|
||
current (car (car list))
|
||
list (cdr list)))
|
||
(while list
|
||
(message "Searching subfile %s..." (cdr (car list)))
|
||
(Info-read-subfile (car (car list)))
|
||
(setq list (cdr list))
|
||
;; (goto-char (point-min))
|
||
(if (re-search-forward regexp nil t)
|
||
(setq found (point) list ())))
|
||
(if found
|
||
(message "")
|
||
(signal 'search-failed (list regexp))))
|
||
(if (not found)
|
||
(progn (Info-read-subfile opoint)
|
||
(goto-char opoint)
|
||
(Info-select-node)))))
|
||
(widen)
|
||
(goto-char found)
|
||
(Info-select-node)
|
||
;; Use string-equal, not equal, to ignore text props.
|
||
(or (and (string-equal onode Info-current-node)
|
||
(equal ofile Info-current-file))
|
||
(setq Info-history (cons (list ofile onode opoint)
|
||
Info-history)))))
|
||
|
||
;; Extract the value of the node-pointer named NAME.
|
||
;; If there is none, use ERRORNAME in the error message;
|
||
;; if ERRORNAME is nil, just return nil.
|
||
(defun Info-extract-pointer (name &optional errorname)
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(forward-line 1)
|
||
(if (re-search-backward (concat name ":") nil t)
|
||
(progn
|
||
(goto-char (match-end 0))
|
||
(Info-following-node-name))
|
||
(if (eq errorname t)
|
||
nil
|
||
(error (concat "Node has no " (capitalize (or errorname name))))))))
|
||
|
||
;; Return the node name in the buffer following point.
|
||
;; ALLOWEDCHARS, if non-nil, goes within [...] to make a regexp
|
||
;; saying which chas may appear in the node name.
|
||
(defun Info-following-node-name (&optional allowedchars)
|
||
(skip-chars-forward " \t")
|
||
(buffer-substring
|
||
(point)
|
||
(progn
|
||
(while (looking-at (concat "[" (or allowedchars "^,\t\n") "]"))
|
||
(skip-chars-forward (concat (or allowedchars "^,\t\n") "("))
|
||
(if (looking-at "(")
|
||
(skip-chars-forward "^)")))
|
||
(skip-chars-backward " ")
|
||
(point))))
|
||
|
||
(defun Info-next ()
|
||
"Go to the next node of this node."
|
||
(interactive)
|
||
(Info-goto-node (Info-extract-pointer "next")))
|
||
|
||
(defun Info-prev ()
|
||
"Go to the previous node of this node."
|
||
(interactive)
|
||
(Info-goto-node (Info-extract-pointer "prev[ious]*" "previous")))
|
||
|
||
(defun Info-up ()
|
||
"Go to the superior node of this node."
|
||
(interactive)
|
||
(Info-goto-node (Info-extract-pointer "up"))
|
||
(Info-restore-point Info-history))
|
||
|
||
(defun Info-last ()
|
||
"Go back to the last node visited."
|
||
(interactive)
|
||
(or Info-history
|
||
(error "This is the first Info node you looked at"))
|
||
(let (filename nodename opoint)
|
||
(setq filename (car (car Info-history)))
|
||
(setq nodename (car (cdr (car Info-history))))
|
||
(setq opoint (car (cdr (cdr (car Info-history)))))
|
||
(setq Info-history (cdr Info-history))
|
||
(Info-find-node filename nodename)
|
||
(setq Info-history (cdr Info-history))
|
||
(goto-char opoint)))
|
||
|
||
(defun Info-directory ()
|
||
"Go to the Info directory node."
|
||
(interactive)
|
||
(Info-find-node "dir" "top"))
|
||
|
||
(defun Info-follow-reference (footnotename)
|
||
"Follow cross reference named NAME to the node it refers to.
|
||
NAME may be an abbreviation of the reference name."
|
||
(interactive
|
||
(let ((completion-ignore-case t)
|
||
completions default alt-default (start-point (point)) str i bol eol)
|
||
(save-excursion
|
||
;; Store end and beginning of line.
|
||
(end-of-line)
|
||
(setq eol (point))
|
||
(beginning-of-line)
|
||
(setq bol (point))
|
||
|
||
(goto-char (point-min))
|
||
(while (re-search-forward "\\*note[ \n\t]*\\([^:]*\\):" nil t)
|
||
(setq str (buffer-substring
|
||
(match-beginning 1)
|
||
(1- (point))))
|
||
;; See if this one should be the default.
|
||
(and (null default)
|
||
(<= (match-beginning 0) start-point)
|
||
(<= start-point (point))
|
||
(setq default t))
|
||
;; See if this one should be the alternate default.
|
||
(and (null alt-default)
|
||
(and (<= bol (match-beginning 0))
|
||
(<= (point) eol))
|
||
(setq alt-default t))
|
||
(setq i 0)
|
||
(while (setq i (string-match "[ \n\t]+" str i))
|
||
(setq str (concat (substring str 0 i) " "
|
||
(substring str (match-end 0))))
|
||
(setq i (1+ i)))
|
||
;; Record as a completion and perhaps as default.
|
||
(if (eq default t) (setq default str))
|
||
(if (eq alt-default t) (setq alt-default str))
|
||
(setq completions
|
||
(cons (cons str nil)
|
||
completions))))
|
||
;; If no good default was found, try an alternate.
|
||
(or default
|
||
(setq default alt-default))
|
||
;; If only one cross-reference found, then make it default.
|
||
(if (eq (length completions) 1)
|
||
(setq default (car (car completions))))
|
||
(if completions
|
||
(let ((input (completing-read (if default
|
||
(concat "Follow reference named: ("
|
||
default ") ")
|
||
"Follow reference named: ")
|
||
completions nil t)))
|
||
(list (if (equal input "")
|
||
default input)))
|
||
(error "No cross-references in this node"))))
|
||
(let (target beg i (str (concat "\\*note " (regexp-quote footnotename))))
|
||
(while (setq i (string-match " " str i))
|
||
(setq str (concat (substring str 0 i) "[ \t\n]+" (substring str (1+ i))))
|
||
(setq i (+ i 6)))
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(or (re-search-forward str nil t)
|
||
(error "No cross-reference named %s" footnotename))
|
||
(goto-char (+ (match-beginning 0) 5))
|
||
(setq target
|
||
(Info-extract-menu-node-name "Bad format cross reference" t)))
|
||
(while (setq i (string-match "[ \t\n]+" target i))
|
||
(setq target (concat (substring target 0 i) " "
|
||
(substring target (match-end 0))))
|
||
(setq i (+ i 1)))
|
||
(Info-goto-node target)))
|
||
|
||
(defun Info-extract-menu-node-name (&optional errmessage multi-line)
|
||
(skip-chars-forward " \t\n")
|
||
(let ((beg (point))
|
||
str i)
|
||
(skip-chars-forward "^:")
|
||
(forward-char 1)
|
||
(setq str
|
||
(if (looking-at ":")
|
||
(buffer-substring beg (1- (point)))
|
||
(skip-chars-forward " \t\n")
|
||
(Info-following-node-name (if multi-line "^.,\t" "^.,\t\n"))))
|
||
(while (setq i (string-match "\n" str i))
|
||
(aset str i ?\ ))
|
||
;; Collapse multiple spaces.
|
||
(while (string-match " +" str)
|
||
(setq str (replace-match " " t t str)))
|
||
str))
|
||
|
||
;; No one calls this.
|
||
;;(defun Info-menu-item-sequence (list)
|
||
;; (while list
|
||
;; (Info-menu (car list))
|
||
;; (setq list (cdr list))))
|
||
|
||
(defun Info-complete-menu-item (string predicate action)
|
||
(let ((case-fold-search t))
|
||
(cond ((eq action nil)
|
||
(let (completions
|
||
(pattern (concat "\n\\* \\("
|
||
(regexp-quote string)
|
||
"[^:\t\n]*\\):")))
|
||
(save-excursion
|
||
(set-buffer Info-complete-menu-buffer)
|
||
(goto-char (point-min))
|
||
(while (re-search-forward pattern nil t)
|
||
(setq completions (cons (cons (format "%s"
|
||
(buffer-substring
|
||
(match-beginning 1)
|
||
(match-end 1)))
|
||
(match-beginning 1))
|
||
completions))))
|
||
(try-completion string completions predicate)))
|
||
((eq action t)
|
||
(let (completions
|
||
(pattern (concat "\n\\* \\("
|
||
(regexp-quote string)
|
||
"[^:\t\n]*\\):")))
|
||
(save-excursion
|
||
(set-buffer Info-complete-menu-buffer)
|
||
(goto-char (point-min))
|
||
(while (re-search-forward pattern nil t)
|
||
(setq completions (cons (cons (format "%s"
|
||
(buffer-substring
|
||
(match-beginning 1)
|
||
(match-end 1)))
|
||
(match-beginning 1))
|
||
completions))))
|
||
(all-completions string completions predicate)))
|
||
(t
|
||
(save-excursion
|
||
(set-buffer Info-complete-menu-buffer)
|
||
(goto-char (point-min))
|
||
(re-search-forward (concat "\n\\* "
|
||
(regexp-quote string)
|
||
":")
|
||
nil t))))))
|
||
|
||
|
||
(defun Info-menu (menu-item)
|
||
"Go to node for menu item named (or abbreviated) NAME.
|
||
Completion is allowed, and the menu item point is on is the default."
|
||
(interactive
|
||
(let ((completions '())
|
||
;; If point is within a menu item, use that item as the default
|
||
(default nil)
|
||
(p (point))
|
||
beg
|
||
(last nil))
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(if (not (search-forward "\n* menu:" nil t))
|
||
(error "No menu in this node"))
|
||
(setq beg (point))
|
||
(and (< (point) p)
|
||
(save-excursion
|
||
(goto-char p)
|
||
(end-of-line)
|
||
(re-search-backward "\n\\* \\([^:\t\n]*\\):" beg t)
|
||
(setq default (format "%s" (buffer-substring
|
||
(match-beginning 1)
|
||
(match-end 1)))))))
|
||
(let ((item nil))
|
||
(while (null item)
|
||
(setq item (let ((completion-ignore-case t)
|
||
(Info-complete-menu-buffer (current-buffer)))
|
||
(completing-read (if default
|
||
(format "Menu item (default %s): "
|
||
default)
|
||
"Menu item: ")
|
||
'Info-complete-menu-item nil t)))
|
||
;; we rely on the fact that completing-read accepts an input
|
||
;; of "" even when the require-match argument is true and ""
|
||
;; is not a valid possibility
|
||
(if (string= item "")
|
||
(if default
|
||
(setq item default)
|
||
;; ask again
|
||
(setq item nil))))
|
||
(list item))))
|
||
;; there is a problem here in that if several menu items have the same
|
||
;; name you can only go to the node of the first with this command.
|
||
(Info-goto-node (Info-extract-menu-item menu-item)))
|
||
|
||
(defun Info-extract-menu-item (menu-item)
|
||
(setq menu-item (regexp-quote menu-item))
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(or (search-forward "\n* menu:" nil t)
|
||
(error "No menu in this node"))
|
||
(or (re-search-forward (concat "\n\\* " menu-item ":") nil t)
|
||
(re-search-forward (concat "\n\\* " menu-item) nil t)
|
||
(error "No such item in menu"))
|
||
(beginning-of-line)
|
||
(forward-char 2)
|
||
(Info-extract-menu-node-name)))
|
||
|
||
;; If COUNT is nil, use the last item in the menu.
|
||
(defun Info-extract-menu-counting (count)
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(or (search-forward "\n* menu:" nil t)
|
||
(error "No menu in this node"))
|
||
(if count
|
||
(or (search-forward "\n* " nil t count)
|
||
(error "Too few items in menu"))
|
||
(while (search-forward "\n* " nil t)
|
||
nil))
|
||
(Info-extract-menu-node-name)))
|
||
|
||
(defun Info-nth-menu-item ()
|
||
"Go to the node of the Nth menu item.
|
||
N is the digit argument used to invoke this command."
|
||
(interactive)
|
||
(Info-goto-node
|
||
(Info-extract-menu-counting
|
||
(- (aref (this-command-keys) (1- (length (this-command-keys)))) ?0))))
|
||
|
||
(defun Info-top-node ()
|
||
"Go to the Top node of this file."
|
||
(interactive)
|
||
(Info-goto-node "Top"))
|
||
|
||
(defun Info-final-node ()
|
||
"Go to the final node in this file."
|
||
(interactive)
|
||
(Info-goto-node "Top")
|
||
(let (Info-history)
|
||
;; Go to the last node in the menu of Top.
|
||
(Info-goto-node (Info-extract-menu-counting nil))
|
||
;; If the last node in the menu is not last in pointer structure,
|
||
;; move forward until we can't go any farther.
|
||
(while (Info-forward-node t t) nil)
|
||
;; Then keep moving down to last subnode, unless we reach an index.
|
||
(while (and (not (string-match "\\<index\\>" Info-current-node))
|
||
(save-excursion (search-forward "\n* Menu:" nil t)))
|
||
(Info-goto-node (Info-extract-menu-counting nil)))))
|
||
|
||
(defun Info-forward-node (&optional not-down no-error)
|
||
"Go forward one node, considering all nodes as forming one sequence."
|
||
(interactive)
|
||
(goto-char (point-min))
|
||
(forward-line 1)
|
||
;; three possibilities, in order of priority:
|
||
;; 1. next node is in a menu in this node (but not in an index)
|
||
;; 2. next node is next at same level
|
||
;; 3. next node is up and next
|
||
(cond ((and (not not-down)
|
||
(save-excursion (search-forward "\n* menu:" nil t))
|
||
(not (string-match "\\<index\\>" Info-current-node)))
|
||
(Info-goto-node (Info-extract-menu-counting 1))
|
||
t)
|
||
((save-excursion (search-backward "next:" nil t))
|
||
(Info-next)
|
||
t)
|
||
((and (save-excursion (search-backward "up:" nil t))
|
||
;; Use string-equal, not equal, to ignore text props.
|
||
(not (string-equal (downcase (Info-extract-pointer "up"))
|
||
"top")))
|
||
(let ((old-node Info-current-node))
|
||
(Info-up)
|
||
(let (Info-history success)
|
||
(unwind-protect
|
||
(setq success (Info-forward-node t no-error))
|
||
(or success (Info-goto-node old-node))))))
|
||
(no-error nil)
|
||
(t (error "No pointer forward from this node"))))
|
||
|
||
(defun Info-backward-node ()
|
||
"Go backward one node, considering all nodes as forming one sequence."
|
||
(interactive)
|
||
(let ((prevnode (Info-extract-pointer "prev[ious]*" t))
|
||
(upnode (Info-extract-pointer "up" t)))
|
||
(cond ((and upnode (string-match "(" upnode))
|
||
(error "First node in file"))
|
||
((and upnode (or (null prevnode)
|
||
;; Use string-equal, not equal,
|
||
;; to ignore text properties.
|
||
(string-equal (downcase prevnode)
|
||
(downcase upnode))))
|
||
(Info-up))
|
||
(prevnode
|
||
;; If we move back at the same level,
|
||
;; go down to find the last subnode*.
|
||
(Info-prev)
|
||
(let (Info-history)
|
||
(while (and (not (string-match "\\<index\\>" Info-current-node))
|
||
(save-excursion (search-forward "\n* Menu:" nil t)))
|
||
(Info-goto-node (Info-extract-menu-counting nil)))))
|
||
(t
|
||
(error "No pointer backward from this node")))))
|
||
|
||
(defun Info-exit ()
|
||
"Exit Info by selecting some other buffer."
|
||
(interactive)
|
||
(if Info-standalone
|
||
(save-buffers-kill-emacs)
|
||
(switch-to-buffer (prog1 (other-buffer (current-buffer))
|
||
(bury-buffer (current-buffer))))))
|
||
|
||
(defun Info-next-menu-item ()
|
||
(interactive)
|
||
(save-excursion
|
||
(forward-line -1)
|
||
(search-forward "\n* menu:" nil t)
|
||
(or (search-forward "\n* " nil t)
|
||
(error "No more items in menu"))
|
||
(Info-goto-node (Info-extract-menu-node-name))))
|
||
|
||
(defun Info-last-menu-item ()
|
||
(interactive)
|
||
(save-excursion
|
||
(forward-line 1)
|
||
(let ((beg (save-excursion
|
||
(and (search-backward "\n* menu:" nil t)
|
||
(point)))))
|
||
(or (and beg (search-backward "\n* " beg t))
|
||
(error "No previous items in menu")))
|
||
(Info-goto-node (save-excursion
|
||
(goto-char (match-end 0))
|
||
(Info-extract-menu-node-name)))))
|
||
|
||
(defmacro Info-no-error (&rest body)
|
||
(list 'condition-case nil (cons 'progn (append body '(t))) '(error nil)))
|
||
|
||
(defun Info-next-preorder ()
|
||
"Go to the next subnode or the next node, or go up a level."
|
||
(interactive)
|
||
(cond ((Info-no-error (Info-next-menu-item)))
|
||
((Info-no-error (Info-next)))
|
||
((Info-no-error (Info-up))
|
||
;; Since we have already gone thru all the items in this menu,
|
||
;; go up to the end of this node.
|
||
(goto-char (point-max)))
|
||
(t
|
||
(error "No more nodes"))))
|
||
|
||
(defun Info-last-preorder ()
|
||
"Go to the last node, popping up a level if there is none."
|
||
(interactive)
|
||
(cond ((Info-no-error
|
||
(Info-last-menu-item)
|
||
;; If we go down a menu item, go to the end of the node
|
||
;; so we can scroll back through it.
|
||
(goto-char (point-max)))
|
||
(recenter -1))
|
||
((Info-no-error (Info-prev))
|
||
(goto-char (point-max))
|
||
(recenter -1))
|
||
((Info-no-error (Info-up))
|
||
(goto-char (point-min))
|
||
(or (search-forward "\n* Menu:" nil t)
|
||
(goto-char (point-max))))
|
||
(t (error "No previous nodes"))))
|
||
|
||
(defun Info-scroll-up ()
|
||
"Scroll one screenful forward in Info, considering all nodes as one sequence.
|
||
Once you scroll far enough in a node that its menu appears on the screen,
|
||
the next scroll moves into its first subnode. When you scroll past
|
||
the end of a node, that goes to the next node or back up to the parent node."
|
||
(interactive)
|
||
(if (or (< (window-start) (point-min))
|
||
(> (window-start) (point-max)))
|
||
(set-window-start (selected-window) (point)))
|
||
(let ((virtual-end (save-excursion
|
||
(goto-char (point-min))
|
||
(if (search-forward "\n* Menu:" nil t)
|
||
(point)
|
||
(point-max)))))
|
||
(if (or (< virtual-end (window-start))
|
||
(pos-visible-in-window-p virtual-end))
|
||
(Info-next-preorder)
|
||
(scroll-up))))
|
||
|
||
(defun Info-scroll-down ()
|
||
"Scroll one screenful back in Info, considering all nodes as one sequence.
|
||
Within the menu of a node, this goes to its last subnode.
|
||
When you scroll past the beginning of a node, that goes to the
|
||
previous node or back up to the parent node."
|
||
(interactive)
|
||
(if (or (< (window-start) (point-min))
|
||
(> (window-start) (point-max)))
|
||
(set-window-start (selected-window) (point)))
|
||
(let ((virtual-end (save-excursion
|
||
(goto-char (point-min))
|
||
(search-forward "\n* Menu:" nil t))))
|
||
(if (or virtual-end (pos-visible-in-window-p (point-min)))
|
||
(Info-last-preorder)
|
||
(scroll-down))))
|
||
|
||
(defun Info-next-reference ()
|
||
"Move cursor to the next cross-reference or menu item in the node."
|
||
(interactive)
|
||
(let ((pat "\\*note[ \n\t]*\\([^:]*\\):\\|^\\* .*:")
|
||
(old-pt (point)))
|
||
(or (eobp) (forward-char 1))
|
||
(or (re-search-forward pat nil t)
|
||
(progn
|
||
(goto-char (point-min))
|
||
(or (re-search-forward pat nil t)
|
||
(progn
|
||
(goto-char old-pt)
|
||
(error "No cross references in this node")))))
|
||
(goto-char (match-beginning 0))
|
||
(if (looking-at "\\* Menu:")
|
||
(Info-next-reference))))
|
||
|
||
(defun Info-prev-reference ()
|
||
"Move cursor to the previous cross-reference or menu item in the node."
|
||
(interactive)
|
||
(let ((pat "\\*note[ \n\t]*\\([^:]*\\):\\|^\\* .*:")
|
||
(old-pt (point)))
|
||
(or (re-search-backward pat nil t)
|
||
(progn
|
||
(goto-char (point-max))
|
||
(or (re-search-backward pat nil t)
|
||
(progn
|
||
(goto-char old-pt)
|
||
(error "No cross references in this node")))))
|
||
(goto-char (match-beginning 0))
|
||
(if (looking-at "\\* Menu:")
|
||
(Info-prev-reference))))
|
||
|
||
(defun Info-index (topic)
|
||
"Look up a string in the index for this file.
|
||
The index is defined as the first node in the top-level menu whose
|
||
name contains the word \"Index\", plus any immediately following
|
||
nodes whose names also contain the word \"Index\".
|
||
If there are no exact matches to the specified topic, this chooses
|
||
the first match which is a case-insensitive substring of a topic.
|
||
Use the `,' command to see the other matches.
|
||
Give a blank topic name to go to the Index node itself."
|
||
(interactive "sIndex topic: ")
|
||
(let ((orignode Info-current-node)
|
||
(rnode nil)
|
||
(pattern (format "\n\\* \\([^\n:]*%s[^\n:]*\\):[ \t]*\\([^.\n]*\\)\\.[ \t]*\\([0-9]*\\)"
|
||
(regexp-quote topic)))
|
||
node)
|
||
(Info-goto-node "Top")
|
||
(or (search-forward "\n* menu:" nil t)
|
||
(error "No index"))
|
||
(or (re-search-forward "\n\\* \\(.*\\<Index\\>\\)" nil t)
|
||
(error "No index"))
|
||
(goto-char (match-beginning 1))
|
||
;; Here, and subsequently in this function,
|
||
;; we bind Info-history to nil for internal node-switches
|
||
;; so that we don't put junk in the history.
|
||
;; In the first Info-goto-node call, above, we do update the history
|
||
;; because that is what the user's previous node choice into it.
|
||
(let ((Info-history nil))
|
||
(Info-goto-node (Info-extract-menu-node-name)))
|
||
(or (equal topic "")
|
||
(let ((matches nil)
|
||
(exact nil)
|
||
(Info-history nil)
|
||
found)
|
||
(while
|
||
(progn
|
||
(goto-char (point-min))
|
||
(while (re-search-forward pattern nil t)
|
||
(setq matches
|
||
(cons (list (buffer-substring (match-beginning 1)
|
||
(match-end 1))
|
||
(buffer-substring (match-beginning 2)
|
||
(match-end 2))
|
||
Info-current-node
|
||
(string-to-int (concat "0"
|
||
(buffer-substring
|
||
(match-beginning 3)
|
||
(match-end 3)))))
|
||
matches)))
|
||
(and (setq node (Info-extract-pointer "next" t))
|
||
(string-match "\\<Index\\>" node)))
|
||
(Info-goto-node node))
|
||
(or matches
|
||
(progn
|
||
(Info-last)
|
||
(error "No \"%s\" in index" topic)))
|
||
;; Here it is a feature that assoc is case-sensitive.
|
||
(while (setq found (assoc topic matches))
|
||
(setq exact (cons found exact)
|
||
matches (delq found matches)))
|
||
(setq Info-index-alternatives (nconc exact (nreverse matches)))
|
||
(Info-index-next 0)))))
|
||
|
||
(defun Info-index-next (num)
|
||
"Go to the next matching index item from the last `i' command."
|
||
(interactive "p")
|
||
(or Info-index-alternatives
|
||
(error "No previous `i' command in this file"))
|
||
(while (< num 0)
|
||
(setq num (+ num (length Info-index-alternatives))))
|
||
(while (> num 0)
|
||
(setq Info-index-alternatives
|
||
(nconc (cdr Info-index-alternatives)
|
||
(list (car Info-index-alternatives)))
|
||
num (1- num)))
|
||
(Info-goto-node (nth 1 (car Info-index-alternatives)))
|
||
(if (> (nth 3 (car Info-index-alternatives)) 0)
|
||
(forward-line (nth 3 (car Info-index-alternatives)))
|
||
(forward-line 3) ; don't search in headers
|
||
(let ((name (car (car Info-index-alternatives))))
|
||
(if (or (re-search-forward (format
|
||
"\\(Function\\|Command\\): %s\\( \\|$\\)"
|
||
(regexp-quote name)) nil t)
|
||
(search-forward (format "`%s'" name) nil t)
|
||
(and (string-match "\\`.*\\( (.*)\\)\\'" name)
|
||
(search-forward
|
||
(format "`%s'" (substring name 0 (match-beginning 1)))
|
||
nil t))
|
||
(search-forward name nil t))
|
||
(beginning-of-line)
|
||
(goto-char (point-min)))))
|
||
(message "Found \"%s\" in %s. %s"
|
||
(car (car Info-index-alternatives))
|
||
(nth 2 (car Info-index-alternatives))
|
||
(if (cdr Info-index-alternatives)
|
||
"(Press `,' for more)"
|
||
"(Only match)")))
|
||
|
||
(defun Info-undefined ()
|
||
"Make command be undefined in Info."
|
||
(interactive)
|
||
(ding))
|
||
|
||
(defun Info-help ()
|
||
"Enter the Info tutorial."
|
||
(interactive)
|
||
(delete-other-windows)
|
||
(Info-find-node "info"
|
||
(if (< (window-height) 23)
|
||
"Help-Small-Screen"
|
||
"Help")))
|
||
|
||
(defun Info-summary ()
|
||
"Display a brief summary of all Info commands."
|
||
(interactive)
|
||
(save-window-excursion
|
||
(switch-to-buffer "*Help*")
|
||
(erase-buffer)
|
||
(insert (documentation 'Info-mode))
|
||
(help-mode)
|
||
(goto-char (point-min))
|
||
(let (ch flag)
|
||
(while (progn (setq flag (not (pos-visible-in-window-p (point-max))))
|
||
(message (if flag "Type Space to see more"
|
||
"Type Space to return to Info"))
|
||
(if (not (eq ?\ (setq ch (read-event))))
|
||
(progn (setq unread-command-events (list ch)) nil)
|
||
flag))
|
||
(scroll-up)))
|
||
(bury-buffer "*Help*")))
|
||
|
||
(defun Info-get-token (pos start all &optional errorstring)
|
||
"Return the token around POS,
|
||
POS must be somewhere inside the token
|
||
START is a regular expression which will match the
|
||
beginning of the tokens delimited string
|
||
ALL is a regular expression with a single
|
||
parenthized subpattern which is the token to be
|
||
returned. E.g. '{\(.*\)}' would return any string
|
||
enclosed in braces around POS.
|
||
SIG optional fourth argument, controls action on no match
|
||
nil: return nil
|
||
t: beep
|
||
a string: signal an error, using that string."
|
||
(save-excursion
|
||
(goto-char pos)
|
||
(re-search-backward start (max (point-min) (- pos 200)) 'yes)
|
||
(let (found)
|
||
(while (and (re-search-forward all (min (point-max) (+ pos 200)) 'yes)
|
||
(not (setq found (and (<= (match-beginning 0) pos)
|
||
(> (match-end 0) pos))))))
|
||
(if (and found (<= (match-beginning 0) pos)
|
||
(> (match-end 0) pos))
|
||
(buffer-substring (match-beginning 1) (match-end 1))
|
||
(cond ((null errorstring)
|
||
nil)
|
||
((eq errorstring t)
|
||
(beep)
|
||
nil)
|
||
(t
|
||
(error "No %s around position %d" errorstring pos)))))))
|
||
|
||
(defun Info-mouse-follow-nearest-node (click)
|
||
"\\<Info-mode-map>Follow a node reference near point.
|
||
Like \\[Info-menu], \\[Info-follow-reference], \\[Info-next], \\[Info-prev] or \\[Info-up] command, depending on where you click.
|
||
At end of the node's text, moves to the next node, or up if none."
|
||
(interactive "e")
|
||
(let* ((start (event-start click))
|
||
(window (car start))
|
||
(pos (car (cdr start))))
|
||
(select-window window)
|
||
(goto-char pos))
|
||
(and (not (Info-try-follow-nearest-node))
|
||
(save-excursion (forward-line 1) (eobp))
|
||
(Info-next-preorder)))
|
||
|
||
(defun Info-follow-nearest-node ()
|
||
"\\<Info-mode-map>Follow a node reference near point.
|
||
Like \\[Info-menu], \\[Info-follow-reference], \\[Info-next], \\[Info-prev] or \\[Info-up] command, depending on where point is.
|
||
If no reference to follow, moves to the next node, or up if none."
|
||
(interactive)
|
||
(or (Info-try-follow-nearest-node)
|
||
(Info-next-preorder)))
|
||
|
||
;; Common subroutine.
|
||
(defun Info-try-follow-nearest-node ()
|
||
"Follow a node reference near point. Return non-nil if successful."
|
||
(let (node)
|
||
(cond
|
||
((setq node (Info-get-token (point) "\\*note[ \n]"
|
||
"\\*note[ \n]\\([^:]*\\):"))
|
||
(Info-follow-reference node))
|
||
((setq node (Info-get-token (point) "\\* " "\\* \\([^:]*\\)::"))
|
||
(Info-goto-node node))
|
||
((setq node (Info-get-token (point) "\\* " "\\* \\([^:]*\\):"))
|
||
(Info-menu node))
|
||
((setq node (Info-get-token (point) "Up: " "Up: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node node))
|
||
((setq node (Info-get-token (point) "Next: " "Next: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node node))
|
||
((setq node (Info-get-token (point) "File: " "File: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node "Top"))
|
||
((setq node (Info-get-token (point) "Prev: " "Prev: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node node)))
|
||
node))
|
||
|
||
(defvar Info-mode-map nil
|
||
"Keymap containing Info commands.")
|
||
(if Info-mode-map
|
||
nil
|
||
(setq Info-mode-map (make-keymap))
|
||
(suppress-keymap Info-mode-map)
|
||
(define-key Info-mode-map "." 'beginning-of-buffer)
|
||
(define-key Info-mode-map " " 'Info-scroll-up)
|
||
(define-key Info-mode-map "\C-m" 'Info-follow-nearest-node)
|
||
(define-key Info-mode-map "\t" 'Info-next-reference)
|
||
(define-key Info-mode-map "\e\t" 'Info-prev-reference)
|
||
(define-key Info-mode-map "1" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "2" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "3" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "4" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "5" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "6" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "7" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "8" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "9" 'Info-nth-menu-item)
|
||
(define-key Info-mode-map "0" 'undefined)
|
||
(define-key Info-mode-map "?" 'Info-summary)
|
||
(define-key Info-mode-map "]" 'Info-forward-node)
|
||
(define-key Info-mode-map "[" 'Info-backward-node)
|
||
(define-key Info-mode-map "<" 'Info-top-node)
|
||
(define-key Info-mode-map ">" 'Info-final-node)
|
||
(define-key Info-mode-map "b" 'beginning-of-buffer)
|
||
(define-key Info-mode-map "d" 'Info-directory)
|
||
(define-key Info-mode-map "e" 'Info-edit)
|
||
(define-key Info-mode-map "f" 'Info-follow-reference)
|
||
(define-key Info-mode-map "g" 'Info-goto-node)
|
||
(define-key Info-mode-map "h" 'Info-help)
|
||
(define-key Info-mode-map "i" 'Info-index)
|
||
(define-key Info-mode-map "l" 'Info-last)
|
||
(define-key Info-mode-map "m" 'Info-menu)
|
||
(define-key Info-mode-map "n" 'Info-next)
|
||
(define-key Info-mode-map "p" 'Info-prev)
|
||
(define-key Info-mode-map "q" 'Info-exit)
|
||
(define-key Info-mode-map "s" 'Info-search)
|
||
;; For consistency with Rmail.
|
||
(define-key Info-mode-map "\M-s" 'Info-search)
|
||
(define-key Info-mode-map "t" 'Info-top-node)
|
||
(define-key Info-mode-map "u" 'Info-up)
|
||
(define-key Info-mode-map "," 'Info-index-next)
|
||
(define-key Info-mode-map "\177" 'Info-scroll-down)
|
||
(define-key Info-mode-map [mouse-2] 'Info-mouse-follow-nearest-node)
|
||
)
|
||
|
||
;; Info mode is suitable only for specially formatted data.
|
||
(put 'info-mode 'mode-class 'special)
|
||
|
||
(defun Info-mode ()
|
||
"\\<Info-mode-map>
|
||
Info mode provides commands for browsing through the Info documentation tree.
|
||
Documentation in Info is divided into \"nodes\", each of which discusses
|
||
one topic and contains references to other nodes which discuss related
|
||
topics. Info has commands to follow the references and show you other nodes.
|
||
|
||
\\[Info-help] Invoke the Info tutorial.
|
||
|
||
Selecting other nodes:
|
||
\\[Info-mouse-follow-nearest-node]
|
||
Follow a node reference you click on.
|
||
This works with menu items, cross references, and
|
||
the \"next\", \"previous\" and \"up\", depending on where you click.
|
||
\\[Info-next] Move to the \"next\" node of this node.
|
||
\\[Info-prev] Move to the \"previous\" node of this node.
|
||
\\[Info-up] Move \"up\" from this node.
|
||
\\[Info-menu] Pick menu item specified by name (or abbreviation).
|
||
Picking a menu item causes another node to be selected.
|
||
\\[Info-directory] Go to the Info directory node.
|
||
\\[Info-follow-reference] Follow a cross reference. Reads name of reference.
|
||
\\[Info-last] Move to the last node you were at.
|
||
\\[Info-index] Look up a topic in this file's Index and move to that node.
|
||
\\[Info-index-next] (comma) Move to the next match from a previous `i' command.
|
||
|
||
Moving within a node:
|
||
\\[Info-scroll-up] Normally, scroll forward a full screen. If the end of the buffer is
|
||
already visible, try to go to the next menu entry, or up if there is none.
|
||
\\[Info-scroll-down] Normally, scroll backward. If the beginning of the buffer is
|
||
already visible, try to go to the previous menu entry, or up if there is none.
|
||
\\[beginning-of-buffer] Go to beginning of node.
|
||
|
||
Advanced commands:
|
||
\\[Info-exit] Quit Info: reselect previously selected buffer.
|
||
\\[Info-edit] Edit contents of selected node.
|
||
1 Pick first item in node's menu.
|
||
2, 3, 4, 5 Pick second ... fifth item in node's menu.
|
||
\\[Info-goto-node] Move to node specified by name.
|
||
You may include a filename as well, as (FILENAME)NODENAME.
|
||
\\[universal-argument] \\[info] Move to new Info file with completion.
|
||
\\[Info-search] Search through this Info file for specified regexp,
|
||
and select the node in which the next occurrence is found.
|
||
\\[Info-next-reference] Move cursor to next cross-reference or menu item.
|
||
\\[Info-prev-reference] Move cursor to previous cross-reference or menu item."
|
||
(kill-all-local-variables)
|
||
(setq major-mode 'Info-mode)
|
||
(setq mode-name "Info")
|
||
(use-local-map Info-mode-map)
|
||
(set-syntax-table text-mode-syntax-table)
|
||
(setq local-abbrev-table text-mode-abbrev-table)
|
||
(setq case-fold-search t)
|
||
(setq buffer-read-only t)
|
||
(make-local-variable 'Info-current-file)
|
||
(make-local-variable 'Info-current-subfile)
|
||
(make-local-variable 'Info-current-node)
|
||
(make-local-variable 'Info-tag-table-marker)
|
||
(make-local-variable 'Info-history)
|
||
(make-local-variable 'Info-index-alternatives)
|
||
(if (memq (framep (selected-frame)) '(x pc))
|
||
(progn
|
||
(make-face 'info-node)
|
||
(make-face 'info-menu-5)
|
||
(make-face 'info-xref)
|
||
(or (face-differs-from-default-p 'info-node)
|
||
(if (face-differs-from-default-p 'bold-italic)
|
||
(copy-face 'bold-italic 'info-node)
|
||
(copy-face 'bold 'info-node)))
|
||
(or (face-differs-from-default-p 'info-menu-5)
|
||
(set-face-underline-p 'info-menu-5 t))
|
||
(or (face-differs-from-default-p 'info-xref)
|
||
(copy-face 'bold 'info-xref)))
|
||
(setq Info-fontify nil))
|
||
(Info-set-mode-line)
|
||
(run-hooks 'Info-mode-hook))
|
||
|
||
(defvar Info-edit-map nil
|
||
"Local keymap used within `e' command of Info.")
|
||
(if Info-edit-map
|
||
nil
|
||
(setq Info-edit-map (nconc (make-sparse-keymap) text-mode-map))
|
||
(define-key Info-edit-map "\C-c\C-c" 'Info-cease-edit))
|
||
|
||
;; Info-edit mode is suitable only for specially formatted data.
|
||
(put 'info-edit-mode 'mode-class 'special)
|
||
|
||
(defun Info-edit-mode ()
|
||
"Major mode for editing the contents of an Info node.
|
||
Like text mode with the addition of `Info-cease-edit'
|
||
which returns to Info mode for browsing.
|
||
\\{Info-edit-map}"
|
||
(use-local-map Info-edit-map)
|
||
(setq major-mode 'Info-edit-mode)
|
||
(setq mode-name "Info Edit")
|
||
(kill-local-variable 'mode-line-buffer-identification)
|
||
(setq buffer-read-only nil)
|
||
(force-mode-line-update)
|
||
(buffer-enable-undo (current-buffer))
|
||
(run-hooks 'Info-edit-mode-hook))
|
||
|
||
(defun Info-edit ()
|
||
"Edit the contents of this Info node.
|
||
Allowed only if variable `Info-enable-edit' is non-nil."
|
||
(interactive)
|
||
(or Info-enable-edit
|
||
(error "Editing info nodes is not enabled"))
|
||
(Info-edit-mode)
|
||
(message (substitute-command-keys
|
||
"Editing: Type \\<Info-edit-map>\\[Info-cease-edit] to return to info")))
|
||
|
||
(defun Info-cease-edit ()
|
||
"Finish editing Info node; switch back to Info proper."
|
||
(interactive)
|
||
;; Do this first, so nothing has changed if user C-g's at query.
|
||
(and (buffer-modified-p)
|
||
(y-or-n-p "Save the file? ")
|
||
(save-buffer))
|
||
(use-local-map Info-mode-map)
|
||
(setq major-mode 'Info-mode)
|
||
(setq mode-name "Info")
|
||
(Info-set-mode-line)
|
||
(setq buffer-read-only t)
|
||
(force-mode-line-update)
|
||
(and (marker-position Info-tag-table-marker)
|
||
(buffer-modified-p)
|
||
(message "Tags may have changed. Use Info-tagify if necessary")))
|
||
|
||
(defun Info-find-emacs-command-nodes (command)
|
||
"Return a list of locations documenting COMMAND in the Emacs Info manual.
|
||
The locations are of the format used in Info-history, i.e.
|
||
\(FILENAME NODENAME BUFFERPOS\)."
|
||
(require 'info)
|
||
(let ((where '())
|
||
(cmd-desc (concat "^\\* " (regexp-quote (symbol-name command))
|
||
":\\s *\\(.*\\)\\.$")))
|
||
(save-excursion
|
||
(Info-find-node "emacs" "Command Index")
|
||
;; Take the index node off the Info history.
|
||
(setq Info-history (cdr Info-history))
|
||
(goto-char (point-max))
|
||
(while (re-search-backward cmd-desc nil t)
|
||
(setq where (cons (list Info-current-file
|
||
(buffer-substring
|
||
(match-beginning 1)
|
||
(match-end 1))
|
||
0)
|
||
where)))
|
||
where)))
|
||
|
||
;;;###autoload
|
||
(defun Info-goto-emacs-command-node (command)
|
||
"Go to the Info node in the Emacs manual for command COMMAND.
|
||
The command is found by looking up in Emacs manual's Command Index."
|
||
(interactive "CFind documentation for command: ")
|
||
(or (commandp command)
|
||
(signal 'wrong-type-argument (list 'commandp command)))
|
||
(let ((where (Info-find-emacs-command-nodes command)))
|
||
(if where
|
||
(let ((num-matches (length where)))
|
||
;; Get Info running, and pop to it in another window.
|
||
(save-window-excursion
|
||
(info))
|
||
(pop-to-buffer "*info*")
|
||
(Info-find-node (car (car where))
|
||
(car (cdr (car where))))
|
||
(if (> num-matches 1)
|
||
(progn
|
||
;; Info-find-node already pushed (car where) onto
|
||
;; Info-history. Put the other nodes that were found on
|
||
;; the history.
|
||
(setq Info-history (nconc (cdr where) Info-history))
|
||
(message (substitute-command-keys
|
||
"Found %d other entr%s. Use \\[Info-last] to see %s.")
|
||
(1- num-matches)
|
||
(if (> num-matches 2) "ies" "y")
|
||
(if (> num-matches 2) "them" "it")))))
|
||
(error "Couldn't find documentation for %s." command))))
|
||
|
||
;;;###autoload
|
||
(defun Info-goto-emacs-key-command-node (key)
|
||
"Go to the Info node in the Emacs manual the command bound to KEY, a string.
|
||
Interactively, if the binding is execute-extended-command, a command is read.
|
||
The command is found by looking up in Emacs manual's Command Index."
|
||
(interactive "kFind documentation for key:")
|
||
(let ((command (key-binding key)))
|
||
(cond ((null command)
|
||
(message "%s is undefined" (key-description key)))
|
||
((and (interactive-p)
|
||
(eq command 'execute-extended-command))
|
||
(Info-goto-emacs-command-node
|
||
(read-command "Find documentation for command: ")))
|
||
(t
|
||
(Info-goto-emacs-command-node command)))))
|
||
|
||
(defun Info-fontify-node ()
|
||
(save-excursion
|
||
(let ((buffer-read-only nil))
|
||
(goto-char (point-min))
|
||
(if (looking-at "^File: [^,: \t]+,?[ \t]+")
|
||
(progn
|
||
(goto-char (match-end 0))
|
||
(while
|
||
(looking-at "[ \t]*[^:, \t\n]+:[ \t]+\\([^:,\t\n]+\\),?")
|
||
(goto-char (match-end 0))
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'face 'info-xref)
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'mouse-face 'highlight))))
|
||
(goto-char (point-min))
|
||
(while (re-search-forward "\\*Note[ \n\t]+\\([^:]*\\):" nil t)
|
||
(if (= (char-after (1- (match-beginning 0))) ?\") ; hack
|
||
nil
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'face 'info-xref)
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'mouse-face 'highlight)))
|
||
(goto-char (point-min))
|
||
(if (and (search-forward "\n* Menu:" nil t)
|
||
(not (string-match "\\<Index\\>" Info-current-node))
|
||
;; Don't take time to annotate huge menus
|
||
(< (- (point-max) (point)) Info-fontify-maximum-menu-size))
|
||
(let ((n 0))
|
||
(while (re-search-forward "^\\* \\([^:\t\n]*\\):" nil t)
|
||
(setq n (1+ n))
|
||
(if (memq n '(5 9)) ; visual aids to help with 1-9 keys
|
||
(put-text-property (match-beginning 0)
|
||
(1+ (match-beginning 0))
|
||
'face 'info-menu-5))
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'face 'info-node)
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'mouse-face 'highlight))))
|
||
(set-buffer-modified-p nil))))
|
||
|
||
(provide 'info)
|
||
|
||
;;; info.el ends here
|