mirror of
https://git.savannah.gnu.org/git/emacs.git
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2495 lines
90 KiB
EmacsLisp
2495 lines
90 KiB
EmacsLisp
;;; info.el --- info package for Emacs.
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;; Copyright (C) 1985, 86, 92, 93, 94, 95, 96, 97, 98, 99, 2000 Free Software
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;; 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 the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, 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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(eval-when-compile (require 'jka-compr))
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(defgroup info nil
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"Info subsystem"
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:group 'help
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:group 'docs)
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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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(defcustom 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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:type 'boolean
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:group 'info)
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(defvar Info-enable-active-nodes nil
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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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(put 'Info-enable-active-nodes 'risky-local-variable t)
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(defcustom Info-fontify t
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"*Non-nil enables highlighting and fonts in Info nodes."
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:type 'boolean
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:group 'info)
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(defface info-node
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'((((class color)) (:foreground "brown" :bold t :italic t))
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(t (:bold t :italic t)))
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"Face for Info node names."
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:group 'info)
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(defface info-menu-5
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'((((class color)) (:foreground "red1"))
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(t (:underline t)))
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"Face for the fifth and tenth `*' in an Info menu."
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:group 'info)
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(defface info-xref
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'((((class color)) (:foreground "magenta4" :bold t))
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(t (:bold t)))
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"Face for Info cross-references."
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:group 'info)
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(defcustom Info-fontify-maximum-menu-size 100000
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"*Maximum size of menu to fontify if `Info-fontify' is non-nil."
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:type 'integer
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:group 'info)
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(defvar Info-directory-list nil
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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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(defcustom 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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:type '(repeat directory)
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:group 'info)
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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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This is the name that was specified in Info, not the actual file name.
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It doesn't contain directory names or file name extensions added by Info.
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Can also be t when using `Info-on-current-buffer'.")
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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 nil
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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-tag-table-buffer nil
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"Buffer used for indirect tag tables.")
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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
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;; The MS-DOS list should work both when long file names are
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;; supported (Windows 9X), and when only 8+3 file names are available.
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(if (eq system-type 'ms-dos)
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'( (".gz" . "gunzip")
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(".z" . "gunzip")
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(".bz2" . "bzip2 -dc")
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(".inz" . "gunzip")
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(".igz" . "gunzip")
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(".info.Z" . "gunzip")
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(".info.gz" . "gunzip")
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("-info.Z" . "gunzip")
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("-info.gz" . "gunzip")
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("/index.gz". "gunzip")
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("/index.z" . "gunzip")
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(".inf" . nil)
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(".info" . nil)
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("-info" . nil)
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("/index" . nil)
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("" . nil))
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'( (".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.bz2" . "bzip2 -dc")
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(".info". nil)
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("-info.Z". "uncompress")
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("-info.Y". "unyabba")
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("-info.gz". "gunzip")
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("-info.bz2" . "bzip2 -dc")
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("-info.z". "gunzip")
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("-info". nil)
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("/index.Z". "uncompress")
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("/index.Y". "unyabba")
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("/index.gz". "gunzip")
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("/index.z". "gunzip")
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("/index.bz2". "bzip2 -dc")
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("/index". 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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(".bz2" . "bzip2 -dc")
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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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;; Concatenate SUFFIX onto FILENAME. SUFFIX should start with a dot.
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;; First, on ms-dos, delete some of the extension in FILENAME
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;; to make room.
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(defun info-insert-file-contents-1 (filename suffix)
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(if (not (eq system-type 'ms-dos))
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(concat filename suffix)
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(let* ((sans-exts (file-name-sans-extension filename))
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;; How long is the extension in FILENAME (not counting the dot).
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(ext-len (max 0 (- (length filename) (length sans-exts) 1)))
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ext-left)
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;; SUFFIX starts with a dot. If FILENAME already has one,
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;; get rid of the one in SUFFIX (unless suffix is empty).
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(or (and (<= ext-len 0)
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(not (eq (aref filename (1- (length filename))) ?.)))
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(= (length suffix) 0)
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(setq suffix (substring suffix 1)))
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;; How many chars of that extension should we keep?
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(setq ext-left (min ext-len (max 0 (- 3 (length suffix)))))
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;; Get rid of the rest of the extension, and add SUFFIX.
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(concat (substring filename 0 (- (length filename)
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(- ext-len ext-left)))
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suffix))))
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(defun info-file-exists-p (filename)
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(and (file-exists-p filename)
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(not (file-directory-p filename))))
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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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;; FILENAME exists--see if that name contains a suffix.
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;; If so, set DECODE accordingly.
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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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;; Try adding suffixes to FILENAME and see if we can find something.
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(while (and tail
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(not (info-file-exists-p (info-insert-file-contents-1
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filename (car (car tail))))))
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(setq tail (cdr tail)))
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;; If we found a file with a suffix, set DECODER according to the suffix
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;; and set FULLNAME to the file's actual name.
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(setq fullname (info-insert-file-contents-1 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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(if decoder
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(progn
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(insert-file-contents-literally fullname visit)
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(let ((buffer-read-only nil)
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(coding-system-for-write 'no-conversion)
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(default-directory (or (file-name-directory fullname)
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default-directory)))
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(call-process-region (point-min) (point-max) decoder t t)))
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(insert-file-contents fullname visit))))
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;; Initialize Info-directory-list, if that hasn't been done yet.
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(defun info-initialize ()
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(unless Info-directory-list
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(let ((path (getenv "INFOPATH"))
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(source (expand-file-name "info/" source-directory))
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(sibling (if installation-directory
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(expand-file-name "info/" installation-directory)))
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alternative)
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(setq Info-directory-list
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(if path
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(split-string path (regexp-quote path-separator))
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(if (and sibling (file-exists-p sibling))
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;; Uninstalled, Emacs builddir != srcdir.
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(setq alternative sibling)
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;; Uninstalled, builddir == srcdir
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(setq alternative source))
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(if (or (member alternative Info-default-directory-list)
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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 (memq system-type '(ms-dos windows-nt))
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nil
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;; Use invocation-directory for Info
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;; only if we used it for 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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(not (file-exists-p alternative)))
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Info-default-directory-list
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;; `alternative' contains the Info files that came with this
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;; version, so we should look there first. `Info-insert-dir'
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;; currently expects to find `alternative' first on the list.
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(cons alternative
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(reverse (cdr (reverse Info-default-directory-list))))))))))
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;;;###autoload
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(defun info-other-window (&optional file)
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"Like `info' but show the Info buffer in another window."
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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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(let (same-window-buffer-names)
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(info file)))
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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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Called from a program, FILE may specify an Info node of the form
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`(FILENAME)NODENAME'.
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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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The search path for Info files is in the variable `Info-directory-list'.
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The top-level Info directory is made by combining all the files named `dir'
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in all the directories in that path."
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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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(progn
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(pop-to-buffer "*info*")
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;; If argument already contains parentheses, don't add another set
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;; since the argument will then be parsed improperly. This also
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;; has the added benefit of allowing node names to be included
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;; following the parenthesized filename.
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(if (and (stringp file) (string-match "(.*)" file))
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(Info-goto-node 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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;; See if the the accessible portion of the buffer begins with a node
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;; delimiter, and the node header line which follows matches REGEXP.
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;; Typically, this test will be followed by a loop that examines the
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;; rest of the buffer with (search-forward "\n\^_"), and it's a pity
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;; to have the overhead of this special test inside the loop.
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;; This function changes match-data, but supposedly the caller might
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;; want to use the results of re-search-backward.
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;; The return value is the value of point at the beginning of matching
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;; REGERXP, if the function succeeds, nil otherwise.
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(defun Info-node-at-bob-matching (regexp)
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(and (bobp) ; are we at beginning of buffer?
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(looking-at "\^_") ; does it begin with node delimiter?
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(let (beg)
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(forward-line 1)
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(setq beg (point))
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(forward-line 1) ; does the line after delimiter match REGEXP?
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(re-search-backward regexp beg t))))
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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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(info-initialize)
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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 (stringp 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 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 ((info-file-exists-p
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(info-insert-file-contents-1
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temp (car (car suffix-list))))
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(setq found temp))
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((info-file-exists-p
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(info-insert-file-contents-1
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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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(or (eq major-mode 'Info-mode) (pop-to-buffer "*info*"))
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(Info-find-node-2 filename nodename no-going-back))
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(defun Info-on-current-buffer (&optional nodename)
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"Use the `Info-mode' to browse the current info buffer.
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If a prefix arg is provided, it queries for the NODENAME which
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else defaults to `Top'."
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(interactive
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(list (if current-prefix-arg
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(completing-read "Node name: " (Info-build-node-completions)
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nil t "Top")
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"Top")))
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(Info-mode)
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(set (make-local-variable 'Info-current-file) t)
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(Info-find-node-2 nil nodename))
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(defun Info-find-node-2 (filename nodename &optional no-going-back)
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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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;; Bind case-fold-search in case the user sets it to nil.
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(let ((case-fold-search t)
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anchorpos)
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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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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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||
(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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||
(if (not (or (string-equal nodename "*")
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||
(not
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(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.
|
||
;; Is this an indirect file?
|
||
(search-backward "\nTag table:\n")
|
||
(setq pos (point))
|
||
(if (save-excursion
|
||
(forward-line 2)
|
||
(looking-at "(Indirect)\n"))
|
||
;; It is indirect. Copy it to another buffer
|
||
;; and record that the tag table is in that buffer.
|
||
(let ((buf (current-buffer))
|
||
(tagbuf
|
||
(or Info-tag-table-buffer
|
||
(generate-new-buffer " *info tag table*"))))
|
||
(setq Info-tag-table-buffer tagbuf)
|
||
(save-excursion
|
||
(set-buffer tagbuf)
|
||
(buffer-disable-undo (current-buffer))
|
||
(setq case-fold-search t)
|
||
(erase-buffer)
|
||
(insert-buffer-substring buf))
|
||
(set-marker Info-tag-table-marker
|
||
(match-end 0) tagbuf))
|
||
(set-marker Info-tag-table-marker pos)))
|
||
(set-marker Info-tag-table-marker nil))
|
||
(setq Info-current-file
|
||
(if (eq filename t) "dir" filename))))
|
||
;; Use string-equal, not equal, to ignore text props.
|
||
(if (string-equal nodename "*")
|
||
(progn (setq Info-current-node nodename)
|
||
(Info-set-mode-line))
|
||
;; Possibilities:
|
||
;;
|
||
;; 1. Anchor found in tag table
|
||
;; 2. Anchor *not* in tag table
|
||
;;
|
||
;; 3. Node found in tag table
|
||
;; 4. Node *not* found in tag table, but found in file
|
||
;; 5. Node *not* in tag table, and *not* in file
|
||
;;
|
||
;; *Or* the same, but in an indirect subfile.
|
||
|
||
;; Search file for a suitable node.
|
||
(let ((guesspos (point-min))
|
||
(regexp
|
||
(concat "\\(Node:\\|Ref:\\) *\\("
|
||
(regexp-quote nodename)
|
||
"\\) *[,\t\n\177]"))
|
||
(nodepos nil))
|
||
|
||
(catch 'foo
|
||
;; First, search a tag table, if any
|
||
(if (marker-position Info-tag-table-marker)
|
||
(let (found-in-tag-table
|
||
found-anchor
|
||
found-mode
|
||
(m Info-tag-table-marker))
|
||
(save-excursion
|
||
(set-buffer (marker-buffer m))
|
||
(goto-char m)
|
||
(beginning-of-line) ; so re-search will work.
|
||
|
||
;; Search tag table
|
||
(setq found-in-tag-table
|
||
(re-search-forward regexp nil t)
|
||
found-anchor
|
||
(string-equal "Ref:" (match-string 1)))
|
||
(if found-in-tag-table
|
||
(setq guesspos (1+ (read (current-buffer)))))
|
||
(setq found-mode major-mode))
|
||
|
||
;; Indirect file among split files
|
||
(if found-in-tag-table
|
||
(progn
|
||
;; If this is an indirect file, determine
|
||
;; which file really holds this node and
|
||
;; read it in.
|
||
(if (not (eq found-mode 'Info-mode))
|
||
;; Note that the current buffer must be
|
||
;; the *info* buffer on entry to
|
||
;; Info-read-subfile. Thus the hackery
|
||
;; above.
|
||
(setq guesspos (Info-read-subfile guesspos)))))
|
||
|
||
;; Handle anchor
|
||
(if found-anchor
|
||
(progn
|
||
(goto-char (setq anchorpos guesspos))
|
||
(throw 'foo t)))))
|
||
|
||
;; Else we may have a node, which we search for:
|
||
(goto-char (max (point-min)
|
||
(- (byte-to-position guesspos) 1000)))
|
||
;; Now search from our advised position
|
||
;; (or from beg of buffer)
|
||
;; to find the actual node.
|
||
;; First, check whether the node is right
|
||
;; where we are, in case the buffer begins
|
||
;; with a node.
|
||
(or (Info-node-at-bob-matching regexp)
|
||
(while (search-forward "\n\^_" nil t)
|
||
(forward-line 1)
|
||
(let ((beg (point)))
|
||
(forward-line 1)
|
||
(if (re-search-backward regexp beg t)
|
||
(progn
|
||
(beginning-of-line)
|
||
(throw 'foo t)))))
|
||
(error
|
||
"No such anchor in tag table or node in tag table or file: %s"
|
||
nodename)))
|
||
|
||
(Info-select-node)
|
||
(goto-char (or anchorpos (point-min))))))
|
||
;; If we did not finish finding the specified node,
|
||
;; go back to the previous one.
|
||
(or Info-current-node no-going-back (null Info-history)
|
||
(let ((hist (car Info-history)))
|
||
(setq Info-history (cdr Info-history))
|
||
(Info-find-node (nth 0 hist) (nth 1 hist) t)
|
||
(goto-char (nth 2 hist))))))
|
||
|
||
;; Cache the contents of the (virtual) dir file, once we have merged
|
||
;; it for the first time, so we can save time subsequently.
|
||
(defvar Info-dir-contents nil)
|
||
|
||
;; Cache for the directory we decided to use for the default-directory
|
||
;; of the merged dir text.
|
||
(defvar Info-dir-contents-directory nil)
|
||
|
||
;; Record the file attributes of all the files from which we
|
||
;; constructed Info-dir-contents.
|
||
(defvar Info-dir-file-attributes nil)
|
||
|
||
(defvar Info-dir-file-name nil)
|
||
|
||
;; Construct the Info directory node by merging the files named `dir'
|
||
;; from various directories. Set the *info* buffer's
|
||
;; default-directory to the first directory we actually get any text
|
||
;; from.
|
||
(defun Info-insert-dir ()
|
||
(if (and Info-dir-contents Info-dir-file-attributes
|
||
;; Verify that none of the files we used has changed
|
||
;; since we used it.
|
||
(eval (cons 'and
|
||
(mapcar '(lambda (elt)
|
||
(let ((curr (file-attributes
|
||
;; Handle symlinks
|
||
(file-truename (car elt)))))
|
||
|
||
;; Don't compare the access time.
|
||
(if curr (setcar (nthcdr 4 curr) 0))
|
||
(setcar (nthcdr 4 (cdr elt)) 0)
|
||
(equal (cdr elt) curr)))
|
||
Info-dir-file-attributes))))
|
||
(progn
|
||
(insert Info-dir-contents)
|
||
(goto-char (point-min)))
|
||
(let ((dirs Info-directory-list)
|
||
;; Bind this in case the user sets it to nil.
|
||
(case-fold-search t)
|
||
;; This is set non-nil if we find a problem in some input files.
|
||
problems
|
||
buffers buffer others nodes dirs-done)
|
||
|
||
(setq Info-dir-file-attributes nil)
|
||
|
||
;; Search the directory list for the directory file.
|
||
(while dirs
|
||
(let ((truename (file-truename (expand-file-name (car dirs)))))
|
||
(or (member truename dirs-done)
|
||
(member (directory-file-name truename) dirs-done)
|
||
;; Try several variants of specified name.
|
||
;; Try upcasing, appending `.info', or both.
|
||
(let* (file
|
||
(attrs
|
||
(or
|
||
(progn (setq file (expand-file-name "dir" truename))
|
||
(file-attributes file))
|
||
(progn (setq file (expand-file-name "DIR" truename))
|
||
(file-attributes file))
|
||
(progn (setq file (expand-file-name "dir.info" truename))
|
||
(file-attributes file))
|
||
(progn (setq file (expand-file-name "DIR.INFO" truename))
|
||
(file-attributes file)))))
|
||
(setq dirs-done
|
||
(cons truename
|
||
(cons (directory-file-name truename)
|
||
dirs-done)))
|
||
(if attrs
|
||
(save-excursion
|
||
(or buffers
|
||
(message "Composing main Info directory..."))
|
||
(set-buffer (generate-new-buffer " info dir"))
|
||
(condition-case nil
|
||
(progn
|
||
(insert-file-contents file)
|
||
(make-local-variable 'Info-dir-file-name)
|
||
(setq Info-dir-file-name file)
|
||
(setq buffers (cons (current-buffer) buffers)
|
||
Info-dir-file-attributes
|
||
(cons (cons file attrs)
|
||
Info-dir-file-attributes)))
|
||
(error (kill-buffer (current-buffer))))))))
|
||
(or (cdr dirs) (setq Info-dir-contents-directory
|
||
(file-name-as-directory (car dirs))))
|
||
(setq dirs (cdr dirs))))
|
||
|
||
(or buffers
|
||
(error "Can't find the Info directory node"))
|
||
;; Distinguish the dir file that comes with Emacs from all the
|
||
;; others. Yes, that is really what this is supposed to do.
|
||
;; The definition of `Info-directory-list' puts it first on that
|
||
;; list and so last in `buffers' at this point.
|
||
(setq buffer (car (last buffers))
|
||
others (delq buffer buffers))
|
||
|
||
;; Insert the entire original dir file as a start; note that we've
|
||
;; already saved its default directory to use as the default
|
||
;; directory for the whole concatenation.
|
||
(insert-buffer buffer)
|
||
|
||
;; Look at each of the other buffers one by one.
|
||
(while others
|
||
(let ((other (car others))
|
||
this-buffer-nodes)
|
||
;; In each, find all the menus.
|
||
(save-excursion
|
||
(set-buffer other)
|
||
(goto-char (point-min))
|
||
;; Find each menu, and add an elt to NODES for it.
|
||
(while (re-search-forward "^\\* Menu:" nil t)
|
||
(let (beg nodename end)
|
||
(forward-line 1)
|
||
(setq beg (point))
|
||
(or (search-backward "\n\^_" nil 'move)
|
||
(looking-at "\^_")
|
||
(signal 'search-failed (list "\n\^_")))
|
||
(search-forward "Node: ")
|
||
(setq nodename (Info-following-node-name))
|
||
(search-forward "\n\^_" nil 'move)
|
||
(beginning-of-line)
|
||
(setq end (point))
|
||
(setq this-buffer-nodes
|
||
(cons (list nodename other beg end)
|
||
this-buffer-nodes))))
|
||
(if (assoc-ignore-case "top" this-buffer-nodes)
|
||
(setq nodes (nconc this-buffer-nodes nodes))
|
||
(setq problems t)
|
||
(message "No `top' node in %s" Info-dir-file-name))))
|
||
(setq others (cdr others)))
|
||
;; Add to the main menu a menu item for each other node.
|
||
(re-search-forward "^\\* Menu:")
|
||
(forward-line 1)
|
||
(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.*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)))
|
||
(goto-char (point-min))
|
||
(if problems
|
||
(message "Composing main Info directory...problems encountered, see `*Messages*'")
|
||
(message "Composing main Info directory...done")))
|
||
(setq Info-dir-contents (buffer-string)))
|
||
(setq default-directory Info-dir-contents-directory))
|
||
|
||
;; Note that on entry to this function the current-buffer must be the
|
||
;; *info* buffer; not the info tags buffer.
|
||
(defun Info-read-subfile (nodepos)
|
||
;; NODEPOS is either a position (in the Info file as a whole,
|
||
;; not relative to a subfile) or the name of a subfile.
|
||
(let (lastfilepos
|
||
lastfilename)
|
||
(if (numberp nodepos)
|
||
(save-excursion
|
||
(set-buffer (marker-buffer Info-tag-table-marker))
|
||
(goto-char (point-min))
|
||
(or (looking-at "\^_")
|
||
(search-forward "\n\^_"))
|
||
(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)))))
|
||
(setq lastfilename nodepos)
|
||
(setq lastfilepos 0))
|
||
;; Assume previous buffer is in Info-mode.
|
||
;; (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))
|
||
(if (looking-at "\^_")
|
||
(forward-char 1)
|
||
(search-forward "\n\^_"))
|
||
(if (numberp nodepos)
|
||
(+ (- nodepos lastfilepos) (point)))))
|
||
|
||
;; Select the info node that point is in.
|
||
(defun Info-select-node ()
|
||
;; Bind this in case the user sets it to nil.
|
||
(let ((case-fold-search t))
|
||
(save-excursion
|
||
;; Find beginning of node.
|
||
(if (search-backward "\n\^_" nil 'move)
|
||
(forward-line 2)
|
||
(if (looking-at "\^_")
|
||
(forward-line 1)
|
||
(signal 'search-failed (list "\n\^_"))))
|
||
;; Get nodename spelled as it is in the node.
|
||
(re-search-forward "Node:[ \t]*")
|
||
(setq Info-current-node
|
||
(buffer-substring-no-properties (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 (if (stringp Info-current-file)
|
||
Info-current-file
|
||
(or buffer-file-name "")))
|
||
"")
|
||
")"
|
||
(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 &optional fork)
|
||
"Go to info node named NAME. Give just NODENAME or (FILENAME)NODENAME.
|
||
If FORK is non-nil, show the node in a new info buffer.
|
||
If FORK is a string, it is the name to use for the new buffer."
|
||
(interactive (list (Info-read-node-name "Goto node: ") current-prefix-arg))
|
||
(info-initialize)
|
||
(if fork
|
||
(set-buffer
|
||
(clone-buffer (concat "*info-" (if (stringp fork) fork nodename) "*") t)))
|
||
(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))))
|
||
|
||
(defvar Info-read-node-completion-table)
|
||
|
||
;; This function is used as the "completion table" while reading a node name.
|
||
;; It does completion using the alist in Info-read-node-completion-table
|
||
;; unless STRING starts with an open-paren.
|
||
(defun Info-read-node-name-1 (string predicate code)
|
||
(let ((no-completion (and (> (length string) 0) (eq (aref string 0) ?\())))
|
||
(cond ((eq code nil)
|
||
(if no-completion
|
||
string
|
||
(try-completion string Info-read-node-completion-table predicate)))
|
||
((eq code t)
|
||
(if no-completion
|
||
nil
|
||
(all-completions string Info-read-node-completion-table predicate)))
|
||
((eq code 'lambda)
|
||
(if no-completion
|
||
t
|
||
(assoc string Info-read-node-completion-table))))))
|
||
|
||
(defun Info-read-node-name (prompt &optional default)
|
||
(let* ((completion-ignore-case t)
|
||
(Info-read-node-completion-table (Info-build-node-completions))
|
||
(nodename (completing-read prompt 'Info-read-node-name-1 nil t)))
|
||
(if (equal nodename "")
|
||
(or default
|
||
(Info-read-node-name prompt))
|
||
nodename)))
|
||
|
||
(defun Info-build-node-completions ()
|
||
(or Info-current-file-completions
|
||
(let ((compl nil)
|
||
;; Bind this in case the user sets it to nil.
|
||
(case-fold-search t)
|
||
(node-regexp "Node: *\\([^,\n]*\\) *[,\n\t]"))
|
||
(save-excursion
|
||
(save-restriction
|
||
(if (marker-buffer Info-tag-table-marker)
|
||
(let ((marker Info-tag-table-marker))
|
||
(set-buffer (marker-buffer marker))
|
||
(widen)
|
||
(goto-char marker)
|
||
(while (re-search-forward "\nNode: \\(.*\\)\177" nil t)
|
||
(setq compl
|
||
(cons (list (match-string-no-properties 1))
|
||
compl))))
|
||
(widen)
|
||
(goto-char (point-min))
|
||
;; If the buffer begins with a node header, process that first.
|
||
(if (Info-node-at-bob-matching node-regexp)
|
||
(setq compl (list (match-string-no-properties 1))))
|
||
;; Now for the rest of the nodes.
|
||
(while (search-forward "\n\^_" nil t)
|
||
(forward-line 1)
|
||
(let ((beg (point)))
|
||
(forward-line 1)
|
||
(if (re-search-backward node-regexp beg t)
|
||
(setq compl
|
||
(cons (list (match-string-no-properties 1))
|
||
compl))))))))
|
||
(setq compl (cons '("*") 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))
|
||
(when regexp
|
||
(let ((found ()) current
|
||
(onode Info-current-node)
|
||
(ofile Info-current-file)
|
||
(opoint (point))
|
||
(ostart (window-start))
|
||
(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 ()))
|
||
(save-excursion
|
||
(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))
|
||
(match-string-no-properties 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 osubfile)
|
||
(goto-char opoint)
|
||
(Info-select-node)
|
||
(set-window-start (selected-window) ostart)))))
|
||
(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)
|
||
;; Bind this in case the user sets it to nil.
|
||
(let ((case-fold-search t))
|
||
(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 "Node has no %s" (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 chars may appear in the node name.
|
||
(defun Info-following-node-name (&optional allowedchars)
|
||
(skip-chars-forward " \t")
|
||
(buffer-substring-no-properties
|
||
(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 (&optional same-file)
|
||
"Go to the superior node of this node.
|
||
If SAME-FILE is non-nil, do not move to a different Info file."
|
||
(interactive)
|
||
(let ((node (Info-extract-pointer "up")))
|
||
(and (or same-file (not (stringp Info-current-file)))
|
||
(string-match "^(" node)
|
||
(error "Up node is in another Info file"))
|
||
(Info-goto-node node))
|
||
(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)))
|
||
|
||
;;;###autoload
|
||
(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)
|
||
(case-fold-search 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-no-properties
|
||
(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))
|
||
;; Don't add this string if it's a duplicate.
|
||
;; We use a loop instead of "(assoc str completions)" because
|
||
;; we want to do a case-insensitive compare.
|
||
(let ((tail completions)
|
||
(tem (downcase str)))
|
||
(while (and tail
|
||
(not (string-equal tem (downcase (car (car tail))))))
|
||
(setq tail (cdr tail)))
|
||
(or tail
|
||
(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"))))
|
||
|
||
(unless footnotename
|
||
(error "No reference was specified"))
|
||
|
||
(let (target beg i (str (concat "\\*note " (regexp-quote footnotename)))
|
||
(case-fold-search t))
|
||
(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-no-properties 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))))
|
||
|
||
(defvar Info-complete-menu-buffer)
|
||
|
||
(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))
|
||
(search-forward "\n* Menu:")
|
||
(while (re-search-forward pattern nil t)
|
||
(setq completions
|
||
(cons (cons (match-string-no-properties 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))
|
||
(search-forward "\n* Menu:")
|
||
(while (re-search-forward pattern nil t)
|
||
(setq completions (cons (cons
|
||
(match-string-no-properties 1)
|
||
(match-beginning 1))
|
||
completions))))
|
||
(all-completions string completions predicate)))
|
||
(t
|
||
(save-excursion
|
||
(set-buffer Info-complete-menu-buffer)
|
||
(goto-char (point-min))
|
||
(search-forward "\n* Menu:")
|
||
(re-search-forward (concat "\n\\* +"
|
||
(regexp-quote string)
|
||
":")
|
||
nil t))))))
|
||
|
||
|
||
(defun Info-menu (menu-item &optional fork)
|
||
"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)
|
||
(if (re-search-backward "\n\\* +\\([^:\t\n]*\\):" beg t)
|
||
(setq default (match-string-no-properties 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 current-prefix-arg))))
|
||
;; 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) (if fork menu-item)))
|
||
|
||
(defun Info-extract-menu-item (menu-item)
|
||
(setq menu-item (regexp-quote menu-item))
|
||
(let ((case-fold-search t))
|
||
(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)
|
||
(let ((case-fold-search t))
|
||
(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)
|
||
(quit-window)))
|
||
|
||
(defun Info-next-menu-item ()
|
||
(interactive)
|
||
(let ((node
|
||
(save-excursion
|
||
(forward-line -1)
|
||
(search-forward "\n* menu:" nil t)
|
||
(and (search-forward "\n* " nil t)
|
||
(Info-extract-menu-node-name)))))
|
||
(if node (Info-goto-node node)
|
||
(error "No more items in menu"))))
|
||
|
||
(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 t))
|
||
;; Since we have already gone thru all the items in this menu,
|
||
;; go up to the end of this node.
|
||
(goto-char (point-max))
|
||
;; Since logically we are done with the node with that menu,
|
||
;; move on from it.
|
||
(Info-next-preorder))
|
||
(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)))
|
||
;; Keep going down, as long as there are nested menu nodes.
|
||
(while (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))
|
||
((and (not (equal (Info-extract-pointer "up")
|
||
(Info-extract-pointer "prev"))))
|
||
(Info-no-error (Info-prev))
|
||
(goto-char (point-max))
|
||
(while (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-up t))
|
||
(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
|
||
but after point, the next scroll moves into its first subnode.
|
||
|
||
When you scroll past the end of a node, that goes to the next node; if
|
||
this node has no successor, it moves to the parent node's successor,
|
||
and so on. If point is inside the menu of a node, it moves to
|
||
subnode indicated by the following menu item. (That case won't
|
||
normally result from this command, but can happen in other ways.)"
|
||
|
||
(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* ((current-point (point))
|
||
(virtual-end (save-excursion
|
||
(beginning-of-line)
|
||
(setq current-point (point))
|
||
(goto-char (point-min))
|
||
(search-forward "\n* Menu:"
|
||
current-point
|
||
t))))
|
||
(if (or virtual-end (pos-visible-in-window-p (point-min)))
|
||
(Info-last-preorder)
|
||
(scroll-down))))
|
||
|
||
(defun Info-next-reference (&optional recur)
|
||
"Move cursor to the next cross-reference or menu item in the node."
|
||
(interactive)
|
||
(let ((pat "\\*note[ \n\t]*\\([^:]*\\):\\|^\\* .*:")
|
||
(old-pt (point))
|
||
(case-fold-search t))
|
||
(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:")
|
||
(if recur
|
||
(error "No cross references in this node")
|
||
(Info-next-reference t)))))
|
||
|
||
(defun Info-prev-reference (&optional recur)
|
||
"Move cursor to the previous cross-reference or menu item in the node."
|
||
(interactive)
|
||
(let ((pat "\\*note[ \n\t]*\\([^:]*\\):\\|^\\* .*:")
|
||
(old-pt (point))
|
||
(case-fold-search t))
|
||
(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:")
|
||
(if recur
|
||
(error "No cross references in this node")
|
||
(Info-prev-reference t)))))
|
||
|
||
(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
|
||
(case-fold-search t))
|
||
(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 (match-string-no-properties 1)
|
||
(match-string-no-properties 2)
|
||
Info-current-node
|
||
(string-to-int (concat "0"
|
||
(match-string 3))))
|
||
matches)))
|
||
(and (setq node (Info-extract-pointer "next" t))
|
||
(string-match "\\<Index\\>" node)))
|
||
(Info-goto-node node))
|
||
(or matches
|
||
(progn
|
||
(Info-goto-node orignode)
|
||
(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"))
|
||
(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))))
|
||
(Info-find-index-name name)))
|
||
(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-find-index-name (name)
|
||
"Move point to the place within the current node where NAME is defined."
|
||
(let ((case-fold-search t))
|
||
(if (or (re-search-forward (format
|
||
"[a-zA-Z]+: %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)))))
|
||
|
||
(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*")
|
||
(setq buffer-read-only nil)
|
||
(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
|
||
parenthesized 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."
|
||
(let ((case-fold-search t))
|
||
(save-excursion
|
||
(goto-char pos)
|
||
;; First look for a match for START that goes across POS.
|
||
(while (and (not (bobp)) (> (point) (- pos (length start)))
|
||
(not (looking-at start)))
|
||
(forward-char -1))
|
||
;; If we did not find one, search back for START
|
||
;; (this finds only matches that end at or before POS).
|
||
(or (looking-at start)
|
||
(progn
|
||
(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))
|
||
(match-string-no-properties 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))
|
||
((Info-get-token (point) "\\* +" "\\* +\\([^:]*\\):")
|
||
(beginning-of-line)
|
||
(forward-char 2)
|
||
(setq node (Info-extract-menu-node-name))
|
||
(Info-goto-node 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 "\M-n" 'clone-buffer)
|
||
(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)
|
||
)
|
||
|
||
(defun Info-check-pointer (item)
|
||
;; Non-nil if ITEM is present in this node.
|
||
(condition-case nil
|
||
(Info-extract-pointer item)
|
||
(error nil)))
|
||
|
||
(easy-menu-define Info-mode-menu Info-mode-map
|
||
"Menu for info files."
|
||
'("Info"
|
||
["Up" Info-up (Info-check-pointer "up")
|
||
:help "Go up in the Info tree"]
|
||
["Next" Info-next (Info-check-pointer "next")
|
||
:help "Go to the next node"]
|
||
["Previous" Info-prev (Info-check-pointer "prev[ious]*")
|
||
:help "Go to the previous node"]
|
||
["Backward" Info-backward-node t
|
||
:help "Go backward one node, considering all as a sequence"]
|
||
["Forward" Info-forward-node t
|
||
:help "Go forward one node, considering all as a sequence"]
|
||
["Top" Info-top-node t
|
||
:help "Go to top node of file"]
|
||
["Final node" Info-final-node t
|
||
:help "Go to final node in this file"]
|
||
("Menu item" ["You should never see this" report-emacs-bug t])
|
||
("Reference" ["You should never see this" report-emacs-bug t])
|
||
["Search..." Info-search t
|
||
:help "Search for regular expression in this Info file"]
|
||
["Goto node..." Info-goto-node t
|
||
:help "Go to a named node]"]
|
||
["Last" Info-last Info-history
|
||
:help "Go to the last node you were at"]
|
||
("Index..."
|
||
["Lookup a String" Info-index t
|
||
:help "Look for a string in the index items"]
|
||
["Next Matching Item" Info-index-next t
|
||
:help "Look for another occurrence of previous item"])
|
||
["Exit" Info-exit t]))
|
||
|
||
(defvar Info-menu-last-node nil)
|
||
;; Last node the menu was created for.
|
||
;; Value is a list, (FILE-NAME NODE-NAME).
|
||
|
||
(defun Info-menu-update ()
|
||
;; Update the Info menu for the current node.
|
||
(condition-case nil
|
||
(if (or (not (eq major-mode 'Info-mode))
|
||
(equal (list Info-current-file Info-current-node)
|
||
Info-menu-last-node))
|
||
()
|
||
;; Update menu menu.
|
||
(let* ((Info-complete-menu-buffer (current-buffer))
|
||
(items (nreverse (condition-case nil
|
||
(Info-complete-menu-item
|
||
"" (lambda (e) t) t)
|
||
(error nil))))
|
||
entries current
|
||
(number 0))
|
||
(while (and items (< number 9))
|
||
(setq current (car items)
|
||
items (cdr items)
|
||
number (1+ number))
|
||
(setq entries (cons `[,current
|
||
(Info-menu ,current)
|
||
:keys ,(format "%d" number)]
|
||
entries)))
|
||
(if items
|
||
(setq entries (cons ["Other..." Info-menu t] entries)))
|
||
(or entries
|
||
(setq entries (list ["No menu" nil nil])))
|
||
(easy-menu-change '("Info") "Menu item" (nreverse entries)))
|
||
;; Update reference menu. Code stolen from `Info-follow-reference'.
|
||
(let ((items nil)
|
||
str i entries current
|
||
(number 0)
|
||
(case-fold-search t))
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(while (re-search-forward "\\*note[ \n\t]*\\([^:]*\\):" nil t)
|
||
(setq str (buffer-substring
|
||
(match-beginning 1)
|
||
(1- (point))))
|
||
(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)))
|
||
(setq items
|
||
(cons str items))))
|
||
(while (and items (< number 9))
|
||
(setq current (car items)
|
||
items (cdr items)
|
||
number (1+ number))
|
||
(setq entries (cons `[,current
|
||
(Info-follow-reference ,current)
|
||
t]
|
||
entries)))
|
||
(if items
|
||
(setq entries (cons ["Other..." Info-follow-reference t]
|
||
entries)))
|
||
(or entries
|
||
(setq entries (list ["No references" nil nil])))
|
||
(easy-menu-change '("Info") "Reference" (nreverse entries)))
|
||
;; Update last seen node.
|
||
(setq Info-menu-last-node (list Info-current-file Info-current-node)))
|
||
;; Try to avoid entering infinite beep mode in case of errors.
|
||
(error (ding))))
|
||
|
||
|
||
;; 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.
|
||
\\[Info-exit] Quit Info: reselect previously selected buffer.
|
||
|
||
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-follow-nearest-node] Follow a node reference near point, like \\[Info-mouse-follow-nearest-node].
|
||
\\[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.
|
||
\\[Info-top-node] Go to the Top node of this file.
|
||
\\[Info-final-node] Go to the final node in this file.
|
||
\\[Info-backward-node] Go backward one node, considering all nodes as forming one sequence.
|
||
\\[Info-forward-node] Go forward one node, considering all nodes as forming one sequence.
|
||
|
||
Moving within a node:
|
||
\\[Info-scroll-up] Normally, scroll forward a full screen.
|
||
Once you scroll far enough in a node that its menu appears on the screen
|
||
but after point, the next scroll moves into its first subnode.
|
||
When after all menu items (or if their is no menu), move up to
|
||
the parent node.
|
||
\\[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")
|
||
(setq tab-width 8)
|
||
(use-local-map Info-mode-map)
|
||
(make-local-hook 'activate-menubar-hook)
|
||
(add-hook 'activate-menubar-hook 'Info-menu-update nil t)
|
||
(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)
|
||
(setq Info-tag-table-marker (make-marker))
|
||
(make-local-variable 'Info-tag-table-buffer)
|
||
(setq Info-tag-table-buffer nil)
|
||
(make-local-variable 'Info-history)
|
||
(make-local-variable 'Info-index-alternatives)
|
||
;; This is for the sake of the invisible text we use handling titles.
|
||
(make-local-variable 'line-move-ignore-invisible)
|
||
(setq line-move-ignore-invisible t)
|
||
(add-hook (make-local-hook 'clone-buffer-hook) 'Info-clone-buffer-hook nil t)
|
||
(Info-set-mode-line)
|
||
(run-hooks 'Info-mode-hook))
|
||
|
||
(defun Info-clone-buffer-hook ()
|
||
(when (bufferp Info-tag-table-buffer)
|
||
(setq Info-tag-table-buffer
|
||
(with-current-buffer Info-tag-table-buffer (clone-buffer)))
|
||
(let ((m Info-tag-table-marker))
|
||
(when (and (markerp m) (marker-position m))
|
||
(setq Info-tag-table-marker
|
||
(with-current-buffer Info-tag-table-buffer
|
||
(copy-marker (marker-position m))))))))
|
||
|
||
(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 "%s" (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")))
|
||
|
||
(defvar Info-file-list-for-emacs
|
||
'("ediff" "forms" "gnus" "info" ("mh" . "mh-e") "sc" "message"
|
||
("dired" . "dired-x") ("c" . "ccmode") "viper")
|
||
"List of Info files that describe Emacs commands.
|
||
An element can be a file name, or a list of the form (PREFIX . FILE)
|
||
where PREFIX is a name prefix and FILE is the file to look in.
|
||
If the element is just a file name, the file name also serves as the prefix.")
|
||
|
||
(defun Info-find-emacs-command-nodes (command)
|
||
"Return a list of locations documenting COMMAND.
|
||
The `info-file' property of COMMAND says which Info manual to search.
|
||
If COMMAND has no property, the variable `Info-file-list-for-emacs'
|
||
defines heuristics for which Info manual to try.
|
||
The locations are of the format used in Info-history, i.e.
|
||
\(FILENAME NODENAME BUFFERPOS\)."
|
||
(let ((where '())
|
||
(cmd-desc (concat "^\\* +" (regexp-quote (symbol-name command))
|
||
":\\s *\\(.*\\)\\.$"))
|
||
(info-file "emacs")) ;default
|
||
;; Determine which info file this command is documented in.
|
||
(if (get command 'info-file)
|
||
(setq info-file (get command 'info-file))
|
||
;; If it doesn't say explicitly, test its name against
|
||
;; various prefixes that we know.
|
||
(let ((file-list Info-file-list-for-emacs))
|
||
(while file-list
|
||
(let* ((elt (car file-list))
|
||
(name (if (consp elt)
|
||
(car elt)
|
||
elt))
|
||
(file (if (consp elt) (cdr elt) elt))
|
||
(regexp (concat "\\`" (regexp-quote name)
|
||
"\\(\\'\\|-\\)")))
|
||
(if (string-match regexp (symbol-name command))
|
||
(setq info-file file file-list nil))
|
||
(setq file-list (cdr file-list))))))
|
||
(save-excursion
|
||
(condition-case nil
|
||
(Info-find-node info-file "Command Index")
|
||
;; Some manuals may not have a separate Command Index node,
|
||
;; so try just Index instead.
|
||
(error
|
||
(Info-find-node info-file "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
|
||
(match-string-no-properties 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
|
||
or in another manual found via COMMAND's `info-file' property or
|
||
the variable `Info-file-list-for-emacs'."
|
||
(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))
|
||
;; FIXME It would be cool if this could use a buffer other
|
||
;; than *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 "Found %d other entr%s. Use %s to see %s."
|
||
(1- num-matches)
|
||
(if (> num-matches 2) "ies" "y")
|
||
(substitute-command-keys "\\[Info-last]")
|
||
(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
|
||
or in another manual found via COMMAND's `info-file' property or
|
||
the variable `Info-file-list-for-emacs'."
|
||
(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)))))
|
||
|
||
(defface Info-title-1-face
|
||
'((t (:family "helv" :height 240 :weight bold)))
|
||
"Face for Info titles at level 1."
|
||
:group 'info)
|
||
|
||
(defface Info-title-2-face
|
||
'((t (:family "helv" :height 180 :weight bold)))
|
||
"Face for Info titles at level 2."
|
||
:group 'info)
|
||
|
||
(defface Info-title-3-face
|
||
'((t (:family "helv" :height 160 :weight bold)))
|
||
"Face for Info titles at level 3."
|
||
:group 'info)
|
||
|
||
(defcustom Info-title-face-alist
|
||
'((?* (face (variable-pitch bold) display (height (+ 4))))
|
||
(?= (face (variable-pitch bold) display (height (+ 3))))
|
||
(?- (face (variable-pitch bold) display (height (+ 2)))))
|
||
"*Alist of face or list of faces to use for pseudo-underlined titles.
|
||
The alist key is the character the title is underlined with (?*, ?= or ?-)."
|
||
:type '(repeat (list character face face))
|
||
:group 'info)
|
||
|
||
(defun Info-fontify-node ()
|
||
(save-excursion
|
||
(let ((buffer-read-only nil)
|
||
(case-fold-search t))
|
||
(goto-char (point-min))
|
||
(when (looking-at "^File: [^,: \t]+,?[ \t]+")
|
||
(goto-char (match-end 0))
|
||
(while
|
||
(looking-at "[ \t]*\\([^:, \t\n]+\\):[ \t]+\\([^:,\t\n]+\\),?")
|
||
(goto-char (match-end 0))
|
||
(if (save-excursion
|
||
(goto-char (match-beginning 1))
|
||
(save-match-data (looking-at "Node:")))
|
||
(put-text-property (match-beginning 2) (match-end 2)
|
||
'face 'info-node)
|
||
(put-text-property (match-beginning 2) (match-end 2)
|
||
'face 'info-xref)
|
||
(put-text-property (match-beginning 2) (match-end 2)
|
||
'mouse-face 'highlight))))
|
||
(goto-char (point-min))
|
||
(while (re-search-forward "\n\\([^ \t\n].+\\)\n\\(\\*+\\|=+\\|-+\\)$"
|
||
nil t)
|
||
(let ((c (preceding-char))
|
||
face)
|
||
(cond ((= c ?*) (setq face 'Info-title-1-face))
|
||
((= c ?=) (setq face 'Info-title-2-face))
|
||
(t (setq face 'Info-title-3-face)))
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'face face))
|
||
;; This is a serious problem for trying to handle multiple
|
||
;; frame types at once. We want this text to be invisible
|
||
;; on frames that can display the font above.
|
||
(if (memq (framep (selected-frame)) '(x pc w32))
|
||
(add-text-properties (match-end 1) (match-end 2)
|
||
'(invisible t intangible t))))
|
||
(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-xref)
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'mouse-face 'highlight))))
|
||
(set-buffer-modified-p nil))))
|
||
|
||
|
||
;; When an Info buffer is killed, make sure the associated tags buffer
|
||
;; is killed too.
|
||
(defun Info-kill-buffer ()
|
||
(and (eq major-mode 'Info-mode)
|
||
Info-tag-table-buffer
|
||
(kill-buffer Info-tag-table-buffer)))
|
||
|
||
(add-hook 'kill-buffer-hook 'Info-kill-buffer)
|
||
|
||
;;; Speedbar support:
|
||
;; These functions permit speedbar to display the "tags" in the
|
||
;; current info node.
|
||
(eval-when-compile (require 'speedbar))
|
||
|
||
(defvar Info-speedbar-key-map nil
|
||
"Keymap used when in the info display mode.")
|
||
|
||
(defun Info-install-speedbar-variables ()
|
||
"Install those variables used by speedbar to enhance Info."
|
||
(if Info-speedbar-key-map
|
||
nil
|
||
(setq Info-speedbar-key-map (speedbar-make-specialized-keymap))
|
||
|
||
;; Basic tree features
|
||
(define-key Info-speedbar-key-map "e" 'speedbar-edit-line)
|
||
(define-key Info-speedbar-key-map "\C-m" 'speedbar-edit-line)
|
||
(define-key Info-speedbar-key-map "+" 'speedbar-expand-line)
|
||
(define-key Info-speedbar-key-map "-" 'speedbar-contract-line)
|
||
)
|
||
|
||
(speedbar-add-expansion-list '("Info" Info-speedbar-menu-items
|
||
Info-speedbar-key-map
|
||
Info-speedbar-hierarchy-buttons)))
|
||
|
||
(defvar Info-speedbar-menu-items
|
||
'(["Browse Node" speedbar-edit-line t]
|
||
["Expand Node" speedbar-expand-line
|
||
(save-excursion (beginning-of-line)
|
||
(looking-at "[0-9]+: *.\\+. "))]
|
||
["Contract Node" speedbar-contract-line
|
||
(save-excursion (beginning-of-line)
|
||
(looking-at "[0-9]+: *.-. "))]
|
||
)
|
||
"Additional menu-items to add to speedbar frame.")
|
||
|
||
;; Make sure our special speedbar major mode is loaded
|
||
(if (featurep 'speedbar)
|
||
(Info-install-speedbar-variables)
|
||
(add-hook 'speedbar-load-hook 'Info-install-speedbar-variables))
|
||
|
||
;;; Info hierarchy display method
|
||
;;;###autoload
|
||
(defun Info-speedbar-browser ()
|
||
"Initialize speedbar to display an info node browser.
|
||
This will add a speedbar major display mode."
|
||
(interactive)
|
||
(require 'speedbar)
|
||
;; Make sure that speedbar is active
|
||
(speedbar-frame-mode 1)
|
||
;; Now, throw us into Info mode on speedbar.
|
||
(speedbar-change-initial-expansion-list "Info")
|
||
)
|
||
|
||
(defun Info-speedbar-hierarchy-buttons (directory depth &optional node)
|
||
"Display an Info directory hierarchy in speedbar.
|
||
DIRECTORY is the current directory in the attached frame.
|
||
DEPTH is the current indentation depth.
|
||
NODE is an optional argument that is used to represent the
|
||
specific node to expand."
|
||
(if (and (not node)
|
||
(save-excursion (goto-char (point-min))
|
||
(let ((case-fold-search t))
|
||
(looking-at "Info Nodes:"))))
|
||
;; Update our "current node" maybe?
|
||
nil
|
||
;; We cannot use the generic list code, that depends on all leaves
|
||
;; being known at creation time.
|
||
(if (not node)
|
||
(speedbar-with-writable (insert "Info Nodes:\n")))
|
||
(let ((completions nil)
|
||
(cf (selected-frame)))
|
||
(select-frame speedbar-attached-frame)
|
||
(save-window-excursion
|
||
(setq completions
|
||
(Info-speedbar-fetch-file-nodes (or node '"(dir)top"))))
|
||
(select-frame cf)
|
||
(if completions
|
||
(speedbar-with-writable
|
||
(while completions
|
||
(speedbar-make-tag-line 'bracket ?+ 'Info-speedbar-expand-node
|
||
(cdr (car completions))
|
||
(car (car completions))
|
||
'Info-speedbar-goto-node
|
||
(cdr (car completions))
|
||
'info-xref depth)
|
||
(setq completions (cdr completions)))
|
||
t)
|
||
nil))))
|
||
|
||
(defun Info-speedbar-goto-node (text node indent)
|
||
"When user clicks on TEXT, goto an info NODE.
|
||
The INDENT level is ignored."
|
||
(select-frame speedbar-attached-frame)
|
||
(let* ((buff (or (get-buffer "*info*")
|
||
(progn (info) (get-buffer "*info*"))))
|
||
(bwin (get-buffer-window buff 0)))
|
||
(if bwin
|
||
(progn
|
||
(select-window bwin)
|
||
(raise-frame (window-frame bwin)))
|
||
(if speedbar-power-click
|
||
(let ((pop-up-frames t)) (select-window (display-buffer buff)))
|
||
(select-frame speedbar-attached-frame)
|
||
(switch-to-buffer buff)))
|
||
(let ((junk (string-match "^(\\([^)]+\\))\\([^.]+\\)$" node))
|
||
(file (match-string 1 node))
|
||
(node (match-string 2 node)))
|
||
(Info-find-node file node)
|
||
;; If we do a find-node, and we were in info mode, restore
|
||
;; the old default method. Once we are in info mode, it makes
|
||
;; sense to return to whatever method the user was using before.
|
||
(if (string= speedbar-initial-expansion-list-name "Info")
|
||
(speedbar-change-initial-expansion-list
|
||
speedbar-previously-used-expansion-list-name)))))
|
||
|
||
(defun Info-speedbar-expand-node (text token indent)
|
||
"Expand the node the user clicked on.
|
||
TEXT is the text of the button we clicked on, a + or - item.
|
||
TOKEN is data related to this node (NAME . FILE).
|
||
INDENT is the current indentation depth."
|
||
(cond ((string-match "+" text) ;we have to expand this file
|
||
(speedbar-change-expand-button-char ?-)
|
||
(if (speedbar-with-writable
|
||
(save-excursion
|
||
(end-of-line) (forward-char 1)
|
||
(Info-speedbar-hierarchy-buttons nil (1+ indent) token)))
|
||
(speedbar-change-expand-button-char ?-)
|
||
(speedbar-change-expand-button-char ??)))
|
||
((string-match "-" text) ;we have to contract this node
|
||
(speedbar-change-expand-button-char ?+)
|
||
(speedbar-delete-subblock indent))
|
||
(t (error "Ooops... not sure what to do")))
|
||
(speedbar-center-buffer-smartly))
|
||
|
||
(defun Info-speedbar-fetch-file-nodes (nodespec)
|
||
"Fetch the subnodes from the info NODESPEC.
|
||
NODESPEC is a string of the form: (file)node.
|
||
Optional THISFILE represends the filename of"
|
||
(save-excursion
|
||
;; Set up a buffer we can use to fake-out Info.
|
||
(set-buffer (get-buffer-create "*info-browse-tmp*"))
|
||
(if (not (equal major-mode 'Info-mode))
|
||
(Info-mode))
|
||
;; Get the node into this buffer
|
||
(let ((junk (string-match "^(\\([^)]+\\))\\([^.]+\\)$" nodespec))
|
||
(file (match-string 1 nodespec))
|
||
(node (match-string 2 nodespec)))
|
||
(Info-find-node file node))
|
||
;; Scan the created buffer
|
||
(goto-char (point-min))
|
||
(let ((completions nil)
|
||
(case-fold-search t)
|
||
(thisfile (progn (string-match "^(\\([^)]+\\))" nodespec)
|
||
(match-string 1 nodespec))))
|
||
;; Always skip the first one...
|
||
(re-search-forward "\n\\* \\([^:\t\n]*\\):" nil t)
|
||
(while (re-search-forward "\n\\* \\([^:\t\n]*\\):" nil t)
|
||
(let ((name (match-string 1)))
|
||
(if (looking-at " *\\(([^)]+)[^.\n]+\\)\\.")
|
||
(setq name (cons name (match-string 1)))
|
||
(if (looking-at " *\\(([^)]+)\\)\\.")
|
||
(setq name (cons name (concat (match-string 1) "Top")))
|
||
(if (looking-at " \\([^.]+\\).")
|
||
(setq name
|
||
(cons name (concat "(" thisfile ")" (match-string 1))))
|
||
(setq name (cons name (concat "(" thisfile ")" name))))))
|
||
(setq completions (cons name completions))))
|
||
(nreverse completions))))
|
||
|
||
;;; Info mode node listing
|
||
(defun Info-speedbar-buttons (buffer)
|
||
"Create a speedbar display to help navigation in an Info file.
|
||
BUFFER is the buffer speedbar is requesting buttons for."
|
||
(if (save-excursion (goto-char (point-min))
|
||
(let ((case-fold-search t))
|
||
(not (looking-at "Info Nodes:"))))
|
||
(erase-buffer))
|
||
(Info-speedbar-hierarchy-buttons nil 0)
|
||
)
|
||
|
||
(dolist (mess '("^Node has no Previous$"
|
||
"^No menu in this node$"
|
||
"^Node has no Next$"
|
||
"^No cross-references in this node^"
|
||
search-failed
|
||
"^No \".*\" in index$"))
|
||
(add-to-list 'debug-ignored-errors mess))
|
||
|
||
(provide 'info)
|
||
|
||
;;; info.el ends here
|