mirror of
https://git.savannah.gnu.org/git/emacs.git
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4310 lines
165 KiB
EmacsLisp
4310 lines
165 KiB
EmacsLisp
;;; info.el --- info package for Emacs
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;; Copyright (C) 1985, 1986, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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;; 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: help
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, 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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;; In particular we make these assumptions:
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;; - a menu item MAY contain colons but not colon-space ": "
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;; - a menu item ending with ": " (but not ":: ") is an index entry
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;; - a node name MAY NOT contain a colon
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;; This distinction is to support indexing of computer programming
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;; language terms that may contain ":" but not ": ".
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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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"Stack of Info nodes user has visited.
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Each element of the stack is a list (FILENAME NODENAME BUFFERPOS).")
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(defvar Info-history-forward nil
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"Stack of Info nodes user has visited with `Info-history-back' command.
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Each element of the stack is a list (FILENAME NODENAME BUFFERPOS).")
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(defvar Info-history-list nil
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"List of all Info nodes user has visited.
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Each element of the list is a list (FILENAME NODENAME).")
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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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(defface info-node
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'((((class color) (background light)) :foreground "brown" :weight bold :slant italic)
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(((class color) (background dark)) :foreground "white" :weight bold :slant italic)
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(t :weight bold :slant italic))
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"Face for Info node names."
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:group 'info)
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(defface info-title-1
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'((((type tty pc) (class color) (background light))
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:foreground "green" :weight bold)
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(((type tty pc) (class color) (background dark))
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:foreground "yellow" :weight bold)
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(t :height 1.2 :inherit info-title-2))
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"Face for info titles at level 1."
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:group 'info)
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;; backward-compatibility alias
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(put 'Info-title-1-face 'face-alias 'info-title-1)
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(defface info-title-2
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'((((type tty pc) (class color)) :foreground "lightblue" :weight bold)
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(t :height 1.2 :inherit info-title-3))
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"Face for info titles at level 2."
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:group 'info)
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;; backward-compatibility alias
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(put 'Info-title-2-face 'face-alias 'info-title-2)
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(defface info-title-3
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'((((type tty pc) (class color)) :weight bold)
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(t :height 1.2 :inherit info-title-4))
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"Face for info titles at level 3."
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:group 'info)
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;; backward-compatibility alias
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(put 'Info-title-3-face 'face-alias 'info-title-3)
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(defface info-title-4
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'((((type tty pc) (class color)) :weight bold)
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(t :weight bold :inherit variable-pitch))
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"Face for info titles at level 4."
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:group 'info)
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;; backward-compatibility alias
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(put 'Info-title-4-face 'face-alias 'info-title-4)
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(defface info-menu-header
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'((((type tty pc))
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:underline t
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:weight bold)
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(t
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:inherit variable-pitch
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:weight bold))
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"Face for headers in Info menus."
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:group 'info)
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(defface info-menu-star
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'((((class color)) :foreground "red1")
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(t :underline t))
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"Face for every third `*' in an Info menu."
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:group 'info)
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(put 'info-menu-5 'face-alias 'info-menu-star)
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(defface info-xref
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'((t :inherit link))
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"Face for unvisited Info cross-references."
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:group 'info)
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(defface info-xref-visited
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'((t :inherit (link-visited info-xref)))
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"Face for visited Info cross-references."
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:version "22.1"
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:group 'info)
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(defcustom Info-fontify-visited-nodes t
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"*Non-nil to fontify references to visited nodes in `info-xref-visited' face."
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:version "22.1"
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:type 'boolean
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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 `font-lock-mode' is non-nil.
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Set to nil to disable node fontification."
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:type 'integer
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:group 'info)
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(defcustom Info-use-header-line t
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"*Non-nil means to put the beginning-of-node links in an Emacs header-line.
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A header-line does not scroll with the rest of the buffer."
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:type 'boolean
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:group 'info)
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(defface info-header-xref
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'((t :inherit info-xref))
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"Face for Info cross-references in a node header."
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:group 'info)
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(defface info-header-node
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'((t :inherit info-node))
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"Face for Info nodes in a node header."
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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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If nil, meaning not yet initialized, 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, or the
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concatenation of the two if INFOPATH ends with a colon.
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When `Info-directory-list' is initialized from the value of
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`Info-default-directory-list', and Emacs is installed in one of the
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standard directories, the directory of Info files that come with Emacs
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is put last (so that local Info files override standard ones).
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When `Info-directory-list' is initialized from the value of
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`Info-default-directory-list', and Emacs is not installed in one
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of the standard directories, the first element of the resulting
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list is the directory where Emacs installs the Info files that
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come with it. This is so that Emacs's own manual, which suits the
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version of Emacs you are using, will always be found first. This
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is useful when you install an experimental version of Emacs without
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removing the standard installation.
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If you want to override the order of directories in
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`Info-default-directory-list', set INFOPATH in the environment.
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If you run the Emacs executable from the `src' directory in the Emacs
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source tree, and INFOPATH is not defined, the `info' directory in the
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source tree is used as the first element of `Info-directory-list', in
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place of the installation Info directory. This is useful when you run
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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 searched after those in `Info-directory-list'."
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:type '(repeat directory)
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:group 'info)
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(defcustom Info-scroll-prefer-subnodes nil
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"*If non-nil, \\<Info-mode-map>\\[Info-scroll-up] in a menu visits subnodes.
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If this is non-nil, and you scroll far enough in a node that its menu
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appears on the screen, the next \\<Info-mode-map>\\[Info-scroll-up]
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moves to a subnode indicated by the following menu item. This means
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that you visit a subnode before getting to the end of the menu.
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Setting this option to nil results in behavior similar to the stand-alone
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Info reader program, which visits the first subnode from the menu only
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when you hit the end of the current node."
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:version "22.1"
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:type 'boolean
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:group 'info)
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(defcustom Info-hide-note-references t
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"*If non-nil, hide the tag and section reference in *note and * menu items.
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If value is non-nil but not `hide', also replaces the \"*note\" with \"see\".
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If value is non-nil but not t or `hide', the reference section is still shown.
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`nil' completely disables this feature."
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:version "22.1"
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:type '(choice (const :tag "No hiding" nil)
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(const :tag "Replace tag and hide reference" t)
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(const :tag "Hide tag and reference" hide)
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(other :tag "Only replace tag" tag))
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:group 'info)
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(defcustom Info-refill-paragraphs nil
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"*If non-nil, attempt to refill paragraphs with hidden references.
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This refilling may accidentally remove explicit line breaks in the Info
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file, so be prepared for a few surprises if you enable this feature."
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:version "22.1"
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:type 'boolean
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:group 'info)
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(defcustom Info-search-whitespace-regexp "\\s-+"
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"*If non-nil, regular expression to match a sequence of whitespace chars.
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This applies to Info search for regular expressions.
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You might want to use something like \"[ \\t\\r\\n]+\" instead.
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In the Customization buffer, that is `[' followed by a space,
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a tab, a carriage return (control-M), a newline, and `]+'."
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:type 'regexp
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:group 'info)
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(defcustom Info-isearch-search t
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"*If non-nil, isearch in Info searches through multiple nodes.
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Before leaving the initial Info node, where isearch was started,
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it fails once with the error message [initial node], and with
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subsequent C-s/C-r continues through other nodes without failing
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with this error message in other nodes. When isearch fails for
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the rest of the manual, it wraps aroung the whole manual and
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restarts the search from the top/final node depending on
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search direction.
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Setting this option to nil restores the default isearch behavior
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with wrapping around the current Info node."
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:version "22.1"
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:type 'boolean
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:group 'info)
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(defvar Info-isearch-initial-node nil)
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(defcustom Info-mode-hook
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;; Try to obey obsolete Info-fontify settings.
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(unless (and (boundp 'Info-fontify) (null Info-fontify))
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'(turn-on-font-lock))
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"Hooks run when `Info-mode' is called."
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:type 'hook
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:group 'info)
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(defcustom Info-selection-hook nil
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"Hooks run when `Info-select-node' is called."
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:type 'hook
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:group 'info)
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(defvar Info-edit-mode-hook nil
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"Hooks run when `Info-edit-mode' is called.")
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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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(defvar Info-current-subfile nil
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"Info subfile that is actually in the *info* buffer now.
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It is 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-file-supports-index-cookies nil
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"Non-nil if current Info file supports index cookies.")
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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-point-loc nil
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"Point location within a selected node.
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If string, the point is moved to the proper occurrence of the
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name of the followed cross reference within a selected node.
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If number, the point is moved to the corresponding line.")
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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.
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STRING may be a list of strings. In that case, the first element is
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the command name, and the rest are arguments to that command.
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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 with no long file names support, delete some of
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;; the extension in FILENAME to make room.
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(defun info-insert-file-contents-1 (filename suffix lfn)
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(if lfn ; long file names are supported
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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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(lfn (if (fboundp 'msdos-long-file-names)
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(msdos-long-file-names)
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t))
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(check-short (and (fboundp 'msdos-long-file-names)
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lfn))
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fullname decoder done)
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(if (info-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 (not done))
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(setq fullname (info-insert-file-contents-1 filename
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(car (car tail)) lfn))
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(if (info-file-exists-p fullname)
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(setq done t
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;; If we found a file with a suffix, set DECODER
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;; according to the suffix.
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decoder (cdr (car tail)))
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;; When the MS-DOS port runs on Windows, we need to check
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;; the short variant of a long file name as well.
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||
(when check-short
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(setq fullname (info-insert-file-contents-1 filename
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(car (car tail)) nil))
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(if (info-file-exists-p fullname)
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(setq done t
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decoder (cdr (car tail))))))
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(setq tail (cdr 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 (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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||
(or (consp decoder)
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(setq decoder (list decoder)))
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||
(apply 'call-process-region (point-min) (point-max)
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(car decoder) t t nil (cdr decoder))))
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(insert-file-contents fullname visit))))
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(defun Info-default-dirs ()
|
||
(let ((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)
|
||
(if invocation-directory
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||
(let ((infodir (expand-file-name
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"../share/info/"
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invocation-directory)))
|
||
(if (file-exists-p infodir)
|
||
infodir
|
||
(setq infodir (expand-file-name
|
||
"../../../share/info/"
|
||
invocation-directory))
|
||
(and (file-exists-p infodir)
|
||
infodir))))))
|
||
alternative)
|
||
(setq alternative
|
||
(if (and sibling (file-exists-p sibling))
|
||
;; Uninstalled, Emacs builddir != srcdir.
|
||
sibling
|
||
;; Uninstalled, builddir == srcdir
|
||
source))
|
||
(if (or (member alternative Info-default-directory-list)
|
||
;; On DOS/NT, we use movable executables always,
|
||
;; and we must always find the Info dir at run time.
|
||
(if (memq system-type '(ms-dos windows-nt))
|
||
nil
|
||
;; Use invocation-directory for Info
|
||
;; only if we used it for exec-directory also.
|
||
(not (string= exec-directory
|
||
(expand-file-name "lib-src/"
|
||
installation-directory))))
|
||
(not (file-exists-p alternative)))
|
||
Info-default-directory-list
|
||
;; `alternative' contains the Info files that came with this
|
||
;; version, so we should look there first. `Info-insert-dir'
|
||
;; currently expects to find `alternative' first on the list.
|
||
(cons alternative
|
||
;; Don't drop the last part, it might contain non-Emacs stuff.
|
||
;; (reverse (cdr (reverse
|
||
Info-default-directory-list)))) ;; )))
|
||
|
||
(defun info-initialize ()
|
||
"Initialize `Info-directory-list', if that hasn't been done yet."
|
||
(unless Info-directory-list
|
||
(let ((path (getenv "INFOPATH")))
|
||
(setq Info-directory-list
|
||
(prune-directory-list
|
||
(if path
|
||
(if (string-match ":\\'" path)
|
||
(append (split-string (substring path 0 -1)
|
||
(regexp-quote path-separator))
|
||
(Info-default-dirs))
|
||
(split-string path (regexp-quote path-separator)))
|
||
(Info-default-dirs)))))))
|
||
|
||
;;;###autoload
|
||
(defun info-other-window (&optional file-or-node)
|
||
"Like `info' but show the Info buffer in another window."
|
||
(interactive (if current-prefix-arg
|
||
(list (read-file-name "Info file name: " nil nil t))))
|
||
(let (same-window-buffer-names same-window-regexps)
|
||
(info file-or-node)))
|
||
|
||
;;;###autoload (add-hook 'same-window-regexps "\\*info\\*\\(\\|<[0-9]+>\\)")
|
||
|
||
;;;###autoload (put 'info 'info-file "emacs")
|
||
;;;###autoload
|
||
(defun info (&optional file-or-node buffer)
|
||
"Enter Info, the documentation browser.
|
||
Optional argument FILE-OR-NODE specifies the file to examine;
|
||
the default is the top-level directory of Info.
|
||
Called from a program, FILE-OR-NODE may specify an Info node of the form
|
||
`(FILENAME)NODENAME'.
|
||
Optional argument BUFFER specifies the Info buffer name;
|
||
the default buffer name is *info*. If BUFFER exists,
|
||
just switch to BUFFER. Otherwise, create a new buffer
|
||
with the top-level Info directory.
|
||
|
||
In interactive use, a non-numeric prefix argument directs
|
||
this command to read a file name from the minibuffer.
|
||
A numeric prefix argument selects an Info buffer with the prefix number
|
||
appended to the Info buffer name.
|
||
|
||
The search path for Info files is in the variable `Info-directory-list'.
|
||
The top-level Info directory is made by combining all the files named `dir'
|
||
in all the directories in that path."
|
||
(interactive (list
|
||
(if (and current-prefix-arg (not (numberp current-prefix-arg)))
|
||
(read-file-name "Info file name: " nil nil t))
|
||
(if (numberp current-prefix-arg)
|
||
(format "*info*<%s>" current-prefix-arg))))
|
||
(pop-to-buffer (or buffer "*info*"))
|
||
(if (and buffer (not (eq major-mode 'Info-mode)))
|
||
(Info-mode))
|
||
(if file-or-node
|
||
;; If argument already contains parentheses, don't add another set
|
||
;; since the argument will then be parsed improperly. This also
|
||
;; has the added benefit of allowing node names to be included
|
||
;; following the parenthesized filename.
|
||
(Info-goto-node
|
||
(if (and (stringp file-or-node) (string-match "(.*)" file-or-node))
|
||
file-or-node
|
||
(concat "(" file-or-node ")")))
|
||
(if (and (zerop (buffer-size))
|
||
(null Info-history))
|
||
;; If we just created the Info buffer, go to the directory.
|
||
(Info-directory))))
|
||
|
||
;;;###autoload
|
||
(defun info-emacs-manual ()
|
||
"Display the Emacs manual in Info mode."
|
||
(interactive)
|
||
(info "emacs"))
|
||
|
||
;;;###autoload
|
||
(defun info-standalone ()
|
||
"Run Emacs as a standalone Info reader.
|
||
Usage: emacs -f info-standalone [filename]
|
||
In standalone mode, \\<Info-mode-map>\\[Info-exit] exits Emacs itself."
|
||
(setq Info-standalone t)
|
||
(if (and command-line-args-left
|
||
(not (string-match "^-" (car command-line-args-left))))
|
||
(condition-case err
|
||
(progn
|
||
(info (car command-line-args-left))
|
||
(setq command-line-args-left (cdr command-line-args-left)))
|
||
(error (send-string-to-terminal
|
||
(format "%s\n" (if (eq (car-safe err) 'error)
|
||
(nth 1 err) err)))
|
||
(save-buffers-kill-emacs)))
|
||
(info)))
|
||
|
||
;; See if the accessible portion of the buffer begins with a node
|
||
;; delimiter, and the node header line which follows matches REGEXP.
|
||
;; Typically, this test will be followed by a loop that examines the
|
||
;; rest of the buffer with (search-forward "\n\^_"), and it's a pity
|
||
;; to have the overhead of this special test inside the loop.
|
||
|
||
;; This function changes match-data, but supposedly the caller might
|
||
;; want to use the results of re-search-backward.
|
||
|
||
;; The return value is the value of point at the beginning of matching
|
||
;; REGEXP, if the function succeeds, nil otherwise.
|
||
(defun Info-node-at-bob-matching (regexp)
|
||
(and (bobp) ; are we at beginning of buffer?
|
||
(looking-at "\^_") ; does it begin with node delimiter?
|
||
(let (beg)
|
||
(forward-line 1)
|
||
(setq beg (point))
|
||
(forward-line 1) ; does the line after delimiter match REGEXP?
|
||
(re-search-backward regexp beg t))))
|
||
|
||
(defun Info-find-file (filename &optional noerror)
|
||
"Return expanded FILENAME, or t, if FILENAME is \"dir\".
|
||
Optional second argument NOERROR, if t, means if file is not found
|
||
just return nil (no error)."
|
||
;; Convert filename to lower case if not found as specified.
|
||
;; Expand it.
|
||
(if (stringp filename)
|
||
(let (temp temp-downcase found)
|
||
(setq filename (substitute-in-file-name filename))
|
||
(cond
|
||
((string= (downcase filename) "dir")
|
||
(setq found t))
|
||
(t
|
||
(let ((dirs (if (string-match "^\\./" filename)
|
||
;; If specified name starts with `./'
|
||
;; then just try current directory.
|
||
'("./")
|
||
(if (file-name-absolute-p filename)
|
||
;; No point in searching for an
|
||
;; absolute file name
|
||
'(nil)
|
||
(if Info-additional-directory-list
|
||
(append Info-directory-list
|
||
Info-additional-directory-list)
|
||
Info-directory-list)))))
|
||
;; Search the directory list for file FILENAME.
|
||
(while (and dirs (not found))
|
||
(setq temp (expand-file-name filename (car dirs)))
|
||
(setq temp-downcase
|
||
(expand-file-name (downcase filename) (car dirs)))
|
||
;; Try several variants of specified name.
|
||
(let ((suffix-list Info-suffix-list)
|
||
(lfn (if (fboundp 'msdos-long-file-names)
|
||
(msdos-long-file-names)
|
||
t)))
|
||
(while (and suffix-list (not found))
|
||
(cond ((info-file-exists-p
|
||
(info-insert-file-contents-1
|
||
temp (car (car suffix-list)) lfn))
|
||
(setq found temp))
|
||
((info-file-exists-p
|
||
(info-insert-file-contents-1
|
||
temp-downcase (car (car suffix-list)) lfn))
|
||
(setq found temp-downcase))
|
||
((and (fboundp 'msdos-long-file-names)
|
||
lfn
|
||
(info-file-exists-p
|
||
(info-insert-file-contents-1
|
||
temp (car (car suffix-list)) nil)))
|
||
(setq found temp)))
|
||
(setq suffix-list (cdr suffix-list))))
|
||
(setq dirs (cdr dirs))))))
|
||
(if found
|
||
(setq filename found)
|
||
(if noerror
|
||
(setq filename nil)
|
||
(error "Info file %s does not exist" filename)))
|
||
filename)
|
||
(and (member filename '(apropos history toc)) filename)))
|
||
|
||
(defun Info-find-node (filename nodename &optional no-going-back)
|
||
"Go to an Info node specified as separate FILENAME and NODENAME.
|
||
NO-GOING-BACK is non-nil if recovering from an error in this function;
|
||
it says do not attempt further (recursive) error recovery."
|
||
(info-initialize)
|
||
(setq filename (Info-find-file filename))
|
||
;; Go into Info buffer.
|
||
(or (eq major-mode 'Info-mode) (pop-to-buffer "*info*"))
|
||
;; Record the node we are leaving, if we were in one.
|
||
(and (not no-going-back)
|
||
Info-current-file
|
||
(setq Info-history
|
||
(cons (list Info-current-file Info-current-node (point))
|
||
Info-history)))
|
||
(Info-find-node-2 filename nodename no-going-back))
|
||
|
||
;;;###autoload
|
||
(defun Info-on-current-buffer (&optional nodename)
|
||
"Use Info mode to browse the current Info buffer.
|
||
With a prefix arg, this queries for the node name to visit first;
|
||
otherwise, that defaults to `Top'."
|
||
(interactive
|
||
(list (if current-prefix-arg
|
||
(completing-read "Node name: " (Info-build-node-completions)
|
||
nil t "Top"))))
|
||
(unless nodename (setq nodename "Top"))
|
||
(info-initialize)
|
||
(Info-mode)
|
||
(set (make-local-variable 'Info-current-file)
|
||
(or buffer-file-name
|
||
;; If called on a non-file buffer, make a fake file name.
|
||
(concat default-directory (buffer-name))))
|
||
(Info-find-node-2 nil nodename))
|
||
|
||
;; It's perhaps a bit nasty to kill the *info* buffer to force a re-read,
|
||
;; but at least it keeps this routine (which is only for the benefit of
|
||
;; makeinfo-buffer) out of the way of normal operations.
|
||
;;
|
||
(defun Info-revert-find-node (filename nodename)
|
||
"Go to an Info node FILENAME and NODENAME, re-reading disk contents.
|
||
When *info* is already displaying FILENAME and NODENAME, the window position
|
||
is preserved, if possible."
|
||
(pop-to-buffer "*info*")
|
||
(let ((old-filename Info-current-file)
|
||
(old-nodename Info-current-node)
|
||
(pcolumn (current-column))
|
||
(pline (count-lines (point-min) (line-beginning-position)))
|
||
(wline (count-lines (point-min) (window-start)))
|
||
(old-history Info-history)
|
||
(new-history (and Info-current-file
|
||
(list Info-current-file Info-current-node (point)))))
|
||
(kill-buffer (current-buffer))
|
||
(Info-find-node filename nodename)
|
||
(setq Info-history old-history)
|
||
(if (and (equal old-filename Info-current-file)
|
||
(equal old-nodename Info-current-node))
|
||
(progn
|
||
;; note goto-line is no good, we want to measure from point-min
|
||
(goto-char (point-min))
|
||
(forward-line wline)
|
||
(set-window-start (selected-window) (point))
|
||
(goto-char (point-min))
|
||
(forward-line pline)
|
||
(move-to-column pcolumn))
|
||
;; only add to the history when coming from a different file+node
|
||
(if new-history
|
||
(setq Info-history (cons new-history Info-history))))))
|
||
|
||
(defun Info-find-in-tag-table-1 (marker regexp case-fold)
|
||
"Find a node in a tag table.
|
||
MARKER specifies the buffer and position to start searching at.
|
||
REGEXP is a regular expression matching nodes or references. Its first
|
||
group should match `Node:' or `Ref:'.
|
||
CASE-FOLD t means search for a case-insensitive match.
|
||
If a match was found, value is a list (FOUND-ANCHOR POS MODE), where
|
||
FOUND-ANCHOR is non-nil if a `Ref:' was matched, POS is the position
|
||
where the match was found, and MODE is `major-mode' of the buffer in
|
||
which the match was found."
|
||
(let ((case-fold-search case-fold))
|
||
(save-excursion
|
||
(set-buffer (marker-buffer marker))
|
||
(goto-char marker)
|
||
|
||
;; Search tag table
|
||
(beginning-of-line)
|
||
(when (re-search-forward regexp nil t)
|
||
(list (string-equal "Ref:" (match-string 1))
|
||
(+ (point-min) (read (current-buffer)))
|
||
major-mode)))))
|
||
|
||
(defun Info-find-in-tag-table (marker regexp)
|
||
"Find a node in a tag table.
|
||
MARKER specifies the buffer and position to start searching at.
|
||
REGEXP is a regular expression matching nodes or references. Its first
|
||
group should match `Node:' or `Ref:'.
|
||
If a match was found, value is a list (FOUND-ANCHOR POS MODE), where
|
||
FOUND-ANCHOR is non-nil if a `Ref:' was matched, POS is the position
|
||
where the match was found, and MODE is `major-mode' of the buffer in
|
||
which the match was found.
|
||
This function tries to find a case-sensitive match first, then a
|
||
case-insensitive match is tried."
|
||
(let ((result (Info-find-in-tag-table-1 marker regexp nil)))
|
||
(when (null (car result))
|
||
(setq result (Info-find-in-tag-table-1 marker regexp t)))
|
||
result))
|
||
|
||
(defun Info-find-node-in-buffer-1 (regexp case-fold)
|
||
"Find a node or anchor in the current buffer.
|
||
REGEXP is a regular expression matching nodes or references. Its first
|
||
group should match `Node:' or `Ref:'.
|
||
CASE-FOLD t means search for a case-insensitive match.
|
||
Value is the position at which a match was found, or nil if not found."
|
||
(let ((case-fold-search case-fold)
|
||
found)
|
||
(save-excursion
|
||
(when (Info-node-at-bob-matching regexp)
|
||
(setq found (point)))
|
||
(while (and (not found)
|
||
(search-forward "\n\^_" nil t))
|
||
(forward-line 1)
|
||
(let ((beg (point)))
|
||
(forward-line 1)
|
||
(when (re-search-backward regexp beg t)
|
||
(beginning-of-line)
|
||
(setq found (point)))))
|
||
found)))
|
||
|
||
(defun Info-find-node-in-buffer (regexp)
|
||
"Find a node or anchor in the current buffer.
|
||
REGEXP is a regular expression matching nodes or references. Its first
|
||
group should match `Node:' or `Ref:'.
|
||
Value is the position at which a match was found, or nil if not found.
|
||
This function looks for a case-sensitive match first. If none is found,
|
||
a case-insensitive match is tried."
|
||
(or (Info-find-node-in-buffer-1 regexp nil)
|
||
(Info-find-node-in-buffer-1 regexp t)))
|
||
|
||
(defun Info-find-node-2 (filename nodename &optional no-going-back)
|
||
(buffer-disable-undo (current-buffer))
|
||
(or (eq major-mode 'Info-mode)
|
||
(Info-mode))
|
||
(widen)
|
||
(setq Info-current-node nil)
|
||
(unwind-protect
|
||
(let ((case-fold-search t)
|
||
anchorpos)
|
||
;; Switch files if necessary
|
||
(or (null filename)
|
||
(equal Info-current-file filename)
|
||
(let ((buffer-read-only nil))
|
||
(setq Info-current-file nil
|
||
Info-current-subfile nil
|
||
Info-current-file-completions nil
|
||
buffer-file-name nil)
|
||
(erase-buffer)
|
||
(cond
|
||
((eq filename t)
|
||
(Info-insert-dir))
|
||
((eq filename 'apropos)
|
||
(insert-buffer-substring " *info-apropos*"))
|
||
((eq filename 'history)
|
||
(insert-buffer-substring " *info-history*"))
|
||
((eq filename 'toc)
|
||
(insert-buffer-substring " *info-toc*"))
|
||
(t
|
||
(info-insert-file-contents filename nil)
|
||
(setq default-directory (file-name-directory filename))))
|
||
(set-buffer-modified-p nil)
|
||
|
||
;; Check makeinfo version for index cookie support
|
||
(let ((found nil))
|
||
(goto-char (point-min))
|
||
(condition-case ()
|
||
(if (and (re-search-forward
|
||
"makeinfo[ \n]version[ \n]\\([0-9]+.[0-9]+\\)"
|
||
(line-beginning-position 3) t)
|
||
(not (version< (match-string 1) "4.7")))
|
||
(setq found t))
|
||
(error nil))
|
||
(set (make-local-variable 'Info-file-supports-index-cookies) found))
|
||
|
||
;; See whether file has a tag table. Record the location if yes.
|
||
(goto-char (point-max))
|
||
(forward-line -8)
|
||
;; Use string-equal, not equal, to ignore text props.
|
||
(if (not (or (string-equal nodename "*")
|
||
(not
|
||
(search-forward "\^_\nEnd tag table\n" nil t))))
|
||
(let (pos)
|
||
;; 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
|
||
(cond
|
||
((eq filename t) "dir")
|
||
(t 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:\\) *\\("
|
||
(if (stringp nodename)
|
||
(regexp-quote nodename)
|
||
"")
|
||
"\\) *[,\t\n\177]")))
|
||
|
||
(catch 'foo
|
||
|
||
;; First, search a tag table, if any
|
||
(when (marker-position Info-tag-table-marker)
|
||
(let* ((m Info-tag-table-marker)
|
||
(found (Info-find-in-tag-table m regexp)))
|
||
|
||
(when found
|
||
;; FOUND is (ANCHOR POS MODE).
|
||
(setq guesspos (nth 1 found))
|
||
|
||
;; If this is an indirect file, determine which
|
||
;; file really holds this node and read it in.
|
||
(unless (eq (nth 2 found) '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
|
||
(when (nth 0 found)
|
||
(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.
|
||
(let ((pos (Info-find-node-in-buffer regexp)))
|
||
(when pos
|
||
(goto-char pos)
|
||
(throw 'foo t)))
|
||
|
||
(when (string-match "\\([^.]+\\)\\." nodename)
|
||
(let (Info-point-loc)
|
||
(Info-find-node-2
|
||
filename (match-string 1 nodename) no-going-back))
|
||
(widen)
|
||
(throw 'foo t))
|
||
|
||
;; No such anchor in tag table or node in tag table or file
|
||
(error "No such node or anchor: %s" nodename))
|
||
|
||
(Info-select-node)
|
||
(goto-char (point-min))
|
||
(cond (anchorpos
|
||
(let ((new-history (list Info-current-file
|
||
(substring-no-properties nodename))))
|
||
;; Add anchors to the history too
|
||
(setq Info-history-list
|
||
(cons new-history
|
||
(delete new-history Info-history-list))))
|
||
(goto-char anchorpos))
|
||
((numberp Info-point-loc)
|
||
(forward-line (1- Info-point-loc))
|
||
(setq Info-point-loc nil))
|
||
((stringp Info-point-loc)
|
||
(Info-find-index-name Info-point-loc)
|
||
(setq Info-point-loc nil))))))
|
||
;; 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 (if Info-additional-directory-list
|
||
(append Info-directory-list
|
||
Info-additional-directory-list)
|
||
Info-directory-list))
|
||
(dir-file-attrs nil)
|
||
;; 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)
|
||
|
||
;; 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)
|
||
(set (make-local-variable 'Info-dir-file-name)
|
||
file)
|
||
(push (current-buffer) buffers)
|
||
(push (cons file attrs) dir-file-attrs))
|
||
(error (kill-buffer (current-buffer))))))))
|
||
(unless (cdr dirs)
|
||
(set (make-local-variable '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.
|
||
(save-excursion (insert-buffer-substring buffer))
|
||
|
||
;; Look at each of the other buffers one by one.
|
||
(dolist (other others)
|
||
(let (this-buffer-nodes)
|
||
;; In each, find all the menus.
|
||
(with-current-buffer other
|
||
(goto-char (point-min))
|
||
;; Find each menu, and add an elt to NODES for it.
|
||
(while (re-search-forward "^\\* Menu:" nil t)
|
||
(while (and (zerop (forward-line 1)) (eolp)))
|
||
(let ((beg (point))
|
||
nodename end)
|
||
(re-search-backward "^\^_")
|
||
(search-forward "Node: ")
|
||
(setq nodename (Info-following-node-name))
|
||
(search-forward "\n\^_" nil 'move)
|
||
(beginning-of-line)
|
||
(setq end (point))
|
||
(push (list nodename other beg end) this-buffer-nodes)))
|
||
(if (assoc-string "top" this-buffer-nodes t)
|
||
(setq nodes (nconc this-buffer-nodes nodes))
|
||
(setq problems t)
|
||
(message "No `top' node in %s" Info-dir-file-name)))))
|
||
;; Add to the main menu a menu item for each other node.
|
||
(re-search-forward "^\\* Menu:")
|
||
(forward-line 1)
|
||
(let ((menu-items '("top"))
|
||
(end (save-excursion (search-forward "\^_" nil t) (point))))
|
||
(dolist (node nodes)
|
||
(let ((nodename (car node)))
|
||
(save-excursion
|
||
(or (member (downcase nodename) menu-items)
|
||
(re-search-forward (concat "^\\* +"
|
||
(regexp-quote nodename)
|
||
"::")
|
||
end t)
|
||
(progn
|
||
(insert "* " nodename "::" "\n")
|
||
(push nodename menu-items)))))))
|
||
;; Now take each node of each of the other buffers
|
||
;; and merge it into the main buffer.
|
||
(dolist (node nodes)
|
||
(let ((case-fold-search t)
|
||
(nodename (car node)))
|
||
(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 node))))
|
||
(Info-dir-remove-duplicates)
|
||
;; Kill all the buffers we just made, including the special one excised.
|
||
(mapc 'kill-buffer (cons buffer buffers))
|
||
(goto-char (point-min))
|
||
(if problems
|
||
(message "Composing main Info directory...problems encountered, see `*Messages*'")
|
||
(message "Composing main Info directory...done"))
|
||
(set (make-local-variable 'Info-dir-contents) (buffer-string))
|
||
(set (make-local-variable 'Info-dir-file-attributes) dir-file-attrs)))
|
||
(setq default-directory Info-dir-contents-directory))
|
||
|
||
(defvar Info-streamline-headings
|
||
'(("Emacs" . "Emacs")
|
||
("Programming" . "Programming")
|
||
("Libraries" . "Libraries")
|
||
("World Wide Web\\|Net Utilities" . "Net Utilities"))
|
||
"List of elements (RE . NAME) to merge headings matching RE to NAME.")
|
||
|
||
(defun Info-dir-remove-duplicates ()
|
||
(let (limit)
|
||
(goto-char (point-min))
|
||
;; Remove duplicate headings in the same menu.
|
||
(while (search-forward "\n* Menu:" nil t)
|
||
(setq limit (save-excursion (search-forward "\n\^_" nil t)))
|
||
;; Look for the next heading to unify.
|
||
(while (re-search-forward "^\\(\\w.*\\)\n\\*" limit t)
|
||
(let ((name (match-string 1))
|
||
(start (match-beginning 0))
|
||
(entries nil) re)
|
||
;; Check whether this heading should be streamlined.
|
||
(save-match-data
|
||
(dolist (x Info-streamline-headings)
|
||
(when (string-match (car x) name)
|
||
(setq name (cdr x))
|
||
(setq re (car x)))))
|
||
(if re (replace-match name t t nil 1))
|
||
(goto-char (if (re-search-forward "^[^* \n\t]" limit t)
|
||
(match-beginning 0)
|
||
(or limit (point-max))))
|
||
;; Look for other headings of the same category and merge them.
|
||
(save-excursion
|
||
(while (re-search-forward "^\\(\\w.*\\)\n\\*" limit t)
|
||
(when (if re (save-match-data (string-match re (match-string 1)))
|
||
(equal name (match-string 1)))
|
||
(forward-line 0)
|
||
;; Delete redundant heading.
|
||
(delete-region (match-beginning 0) (point))
|
||
;; Push the entries onto `text'.
|
||
(push
|
||
(delete-and-extract-region
|
||
(point)
|
||
(if (re-search-forward "^[^* \n\t]" nil t)
|
||
(match-beginning 0)
|
||
(or limit (point-max))))
|
||
entries)
|
||
(forward-line 0))))
|
||
;; Insert the entries just found.
|
||
(while (= (line-beginning-position 0) (1- (point)))
|
||
(backward-char))
|
||
(dolist (entry (nreverse entries))
|
||
(insert entry)
|
||
(while (= (line-beginning-position 0) (1- (point)))
|
||
(delete-region (1- (point)) (point))))
|
||
|
||
;; Now remove duplicate entries under the same heading.
|
||
(let ((seen nil)
|
||
(limit (point-marker)))
|
||
(goto-char start)
|
||
(while (and (> limit (point))
|
||
(re-search-forward "^* \\([^:\n]+:\\(:\\|[^.\n]+\\).\\)"
|
||
limit 'move))
|
||
;; Fold case straight away; `member-ignore-case' here wasteful.
|
||
(let ((x (downcase (match-string 1))))
|
||
(if (member x seen)
|
||
(delete-region (match-beginning 0)
|
||
(progn (re-search-forward "^[^ \t]" nil t)
|
||
(match-beginning 0)))
|
||
(push x seen))))))))))
|
||
|
||
;; 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 (+ (point-min) (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)))
|
||
;; Widen in case we are in the same subfile as before.
|
||
(widen)
|
||
(goto-char (point-min))
|
||
(if (looking-at "\^_")
|
||
(forward-char 1)
|
||
(search-forward "\n\^_"))
|
||
(if (numberp nodepos)
|
||
(+ (- nodepos lastfilepos) (point)))))
|
||
|
||
(defun Info-unescape-quotes (value)
|
||
"Unescape double quotes and backslashes in VALUE."
|
||
(let ((start 0)
|
||
(unquote value))
|
||
(while (string-match "[^\\\"]*\\(\\\\\\)[\\\\\"]" unquote start)
|
||
(setq unquote (replace-match "" t t unquote 1))
|
||
(setq start (- (match-end 0) 1)))
|
||
unquote))
|
||
|
||
;; As of Texinfo 4.6, makeinfo writes constructs like
|
||
;; \0\h[image param=value ...\h\0]
|
||
;; into the Info file for handling images.
|
||
(defun Info-split-parameter-string (parameter-string)
|
||
"Return alist of (\"KEY\" . \"VALUE\") from PARAMETER-STRING; a
|
||
whitespace separated list of KEY=VALUE pairs. If VALUE contains
|
||
whitespace or double quotes, it must be quoted in double quotes and
|
||
any double quotes or backslashes must be escaped (\\\",\\\\)."
|
||
(let ((start 0)
|
||
(parameter-alist))
|
||
(while (string-match
|
||
"\\s *\\([^=]+\\)=\\(?:\\([^\\s \"]+\\)\\|\\(?:\"\\(\\(?:[^\\\"]\\|\\\\[\\\\\"]\\)*\\)\"\\)\\)"
|
||
parameter-string start)
|
||
(setq start (match-end 0))
|
||
(push (cons (match-string 1 parameter-string)
|
||
(or (match-string 2 parameter-string)
|
||
(Info-unescape-quotes
|
||
(match-string 3 parameter-string))))
|
||
parameter-alist))
|
||
parameter-alist))
|
||
|
||
(defun Info-display-images-node ()
|
||
"Display images in current node."
|
||
(save-excursion
|
||
(let ((inhibit-read-only t)
|
||
(case-fold-search t))
|
||
(goto-char (point-min))
|
||
(while (re-search-forward
|
||
"\\(\0\b[[]image\\(\\(?:[^\b]\\|[^\0]+\b\\)*\\)\0\b[]]\\)"
|
||
nil t)
|
||
(let* ((start (match-beginning 1))
|
||
(parameter-alist (Info-split-parameter-string (match-string 2)))
|
||
(src (cdr (assoc-string "src" parameter-alist))))
|
||
(if (display-images-p)
|
||
(let* ((image-file (if src (if (file-name-absolute-p src) src
|
||
(concat default-directory src))
|
||
""))
|
||
(image (if (file-exists-p image-file)
|
||
(create-image image-file)
|
||
"[broken image]")))
|
||
(if (not (get-text-property start 'display))
|
||
(add-text-properties
|
||
start (point) `(display ,image rear-nonsticky (display)))))
|
||
;; text-only display, show alternative text if provided, or
|
||
;; otherwise a clue that there's meant to be a picture
|
||
(delete-region start (point))
|
||
(insert (or (cdr (assoc-string "text" parameter-alist))
|
||
(cdr (assoc-string "alt" parameter-alist))
|
||
(and src
|
||
(concat "[image:" src "]"))
|
||
"[image]"))))))
|
||
(set-buffer-modified-p nil)))
|
||
|
||
;; Texinfo 4.7 adds cookies of the form ^@^H[NAME CONTENTS ^@^H].
|
||
;; Hide any construct of the general form ^@[^@-^_][ ... ^@[^@-^_]],
|
||
;; including one optional trailing newline.
|
||
(defun Info-hide-cookies-node ()
|
||
"Hide unrecognized cookies in current node."
|
||
(save-excursion
|
||
(let ((inhibit-read-only t)
|
||
(case-fold-search t))
|
||
(goto-char (point-min))
|
||
(while (re-search-forward
|
||
"\\(\0[\0-\37][[][^\0]*\0[\0-\37][]]\n?\\)"
|
||
nil t)
|
||
(let* ((start (match-beginning 1)))
|
||
(if (not (get-text-property start 'invisible))
|
||
(put-text-property start (point) 'invisible t)))))
|
||
(set-buffer-modified-p nil)))
|
||
|
||
(defun Info-select-node ()
|
||
"Select the Info node that point is in."
|
||
;; 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 the node contents
|
||
(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))
|
||
;; Add a new unique history item to full history list
|
||
(let ((new-history (list Info-current-file Info-current-node)))
|
||
(setq Info-history-list
|
||
(cons new-history (delete new-history Info-history-list)))
|
||
(setq Info-history-forward nil))
|
||
(if (not (eq Info-fontify-maximum-menu-size nil))
|
||
(Info-fontify-node))
|
||
(Info-display-images-node)
|
||
(Info-hide-cookies-node)
|
||
(run-hooks 'Info-selection-hook)))))
|
||
|
||
(defvar Info-mode-line-node-keymap
|
||
(let ((map (make-sparse-keymap)))
|
||
(define-key map [mode-line mouse-1] 'Info-mouse-scroll-up)
|
||
(define-key map [mode-line mouse-3] 'Info-mouse-scroll-down)
|
||
map)
|
||
"Keymap to put on the Info node name in the mode line.")
|
||
|
||
(defun Info-set-mode-line ()
|
||
(setq mode-line-buffer-identification
|
||
(nconc (propertized-buffer-identification "%b")
|
||
(list
|
||
(concat
|
||
" ("
|
||
(if (stringp Info-current-file)
|
||
(replace-regexp-in-string
|
||
"%" "%%" (file-name-nondirectory Info-current-file))
|
||
(format "*%S*" Info-current-file))
|
||
") "
|
||
(if Info-current-node
|
||
(propertize (replace-regexp-in-string
|
||
"%" "%%" Info-current-node)
|
||
'face 'mode-line-buffer-id
|
||
'help-echo
|
||
"mouse-1: scroll forward, mouse-3: scroll back"
|
||
'mouse-face 'mode-line-highlight
|
||
'local-map Info-mode-line-node-keymap)
|
||
""))))))
|
||
|
||
;; Go to an Info node specified with a filename-and-nodename string
|
||
;; of the sort that is found in pointers in nodes.
|
||
|
||
;; Don't autoload this function: the correct entry point for other packages
|
||
;; to use is `info'. --Stef
|
||
;; ;;;###autoload
|
||
(defun Info-goto-node (nodename &optional fork)
|
||
"Go to Info node named NODENAME. Give just NODENAME or (FILENAME)NODENAME.
|
||
If NODENAME is of the form (FILENAME)NODENAME, the node is in the Info file
|
||
FILENAME; otherwise, NODENAME should be in the current Info file (or one of
|
||
its sub-files).
|
||
Completion is available, but only for node names in the current Info file.
|
||
If FORK is non-nil (interactively with a prefix arg), 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 "Go to 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))
|
||
""
|
||
(match-string 2 nodename))
|
||
nodename (match-string 3 nodename))
|
||
(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)
|
||
|
||
(defun Info-read-node-name-2 (string path-and-suffixes action)
|
||
"Virtual completion table for file names input in Info node names.
|
||
PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)."
|
||
(let* ((names nil)
|
||
(suffixes (remove "" (cdr path-and-suffixes)))
|
||
(suffix (concat (regexp-opt suffixes t) "\\'"))
|
||
(string-dir (file-name-directory string))
|
||
(dirs
|
||
(if (file-name-absolute-p string)
|
||
(list (file-name-directory string))
|
||
(car path-and-suffixes))))
|
||
(dolist (dir dirs)
|
||
(unless dir
|
||
(setq dir default-directory))
|
||
(if string-dir (setq dir (expand-file-name string-dir dir)))
|
||
(when (file-directory-p dir)
|
||
(dolist (file (file-name-all-completions
|
||
(file-name-nondirectory string) dir))
|
||
;; If the file name has no suffix or a standard suffix,
|
||
;; include it.
|
||
(and (or (null (file-name-extension file))
|
||
(string-match suffix file))
|
||
;; But exclude subfiles of split Info files.
|
||
(not (string-match "-[0-9]+\\'" file))
|
||
;; And exclude backup files.
|
||
(not (string-match "~\\'" file))
|
||
(push (if string-dir (concat string-dir file) file) names))
|
||
;; If the file name ends in a standard suffix,
|
||
;; add the unsuffixed name as a completion option.
|
||
(when (string-match suffix file)
|
||
(setq file (substring file 0 (match-beginning 0)))
|
||
(push (if string-dir (concat string-dir file) file) names)))))
|
||
(cond
|
||
((eq action t) (all-completions string names))
|
||
((null action) (try-completion string names))
|
||
(t (test-completion string names)))))
|
||
|
||
;; 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)
|
||
(cond
|
||
;; First complete embedded file names.
|
||
((string-match "\\`([^)]*\\'" string)
|
||
(let ((file (substring string 1)))
|
||
(cond
|
||
((eq code nil)
|
||
(let ((comp (try-completion file 'Info-read-node-name-2
|
||
(cons Info-directory-list
|
||
(mapcar 'car Info-suffix-list)))))
|
||
(cond
|
||
((eq comp t) (concat string ")"))
|
||
(comp (concat "(" comp)))))
|
||
((eq code t)
|
||
(all-completions file 'Info-read-node-name-2
|
||
(cons Info-directory-list
|
||
(mapcar 'car Info-suffix-list))))
|
||
(t nil))))
|
||
;; If a file name was given, then any node is fair game.
|
||
((string-match "\\`(" string)
|
||
(cond
|
||
((eq code nil) string)
|
||
((eq code t) nil)
|
||
(t t)))
|
||
;; Otherwise use Info-read-node-completion-table.
|
||
((eq code nil)
|
||
(try-completion string Info-read-node-completion-table predicate))
|
||
((eq code t)
|
||
(all-completions string Info-read-node-completion-table predicate))
|
||
(t
|
||
(test-completion string Info-read-node-completion-table predicate))))
|
||
|
||
;; Arrange to highlight the proper letters in the completion list buffer.
|
||
(put 'Info-read-node-name-1 'completion-base-size-function
|
||
(lambda ()
|
||
(if (string-match "\\`([^)]*\\'"
|
||
(or completion-common-substring
|
||
(minibuffer-completion-contents)))
|
||
1
|
||
0)))
|
||
|
||
(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
|
||
(or Info-tag-table-marker
|
||
(error "No Info tags found"))
|
||
(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 "\n\\(Node\\|Ref\\): \\(.*\\)\177" nil t)
|
||
(setq compl
|
||
(cons (list (match-string-no-properties 2))
|
||
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))
|
||
(set (make-local-variable '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-search-history nil
|
||
"The history list for `Info-search'.")
|
||
|
||
(defvar Info-search-case-fold nil
|
||
"The value of `case-fold-search' from previous `Info-search' command.")
|
||
|
||
(defun Info-search (regexp &optional bound noerror count direction)
|
||
"Search for REGEXP, starting from point, and select node it's found in.
|
||
If DIRECTION is `backward', search in the reverse direction."
|
||
(interactive (list (read-string
|
||
(if Info-search-history
|
||
(format "Regexp search%s (default %s): "
|
||
(if case-fold-search "" " case-sensitively")
|
||
(car Info-search-history))
|
||
(format "Regexp search%s: "
|
||
(if case-fold-search "" " case-sensitively")))
|
||
nil 'Info-search-history)))
|
||
(when transient-mark-mode
|
||
(deactivate-mark))
|
||
(when (equal regexp "")
|
||
(setq regexp (car Info-search-history)))
|
||
(when regexp
|
||
(let (found beg-found give-up
|
||
(backward (eq direction 'backward))
|
||
(onode Info-current-node)
|
||
(ofile Info-current-file)
|
||
(opoint (point))
|
||
(opoint-min (point-min))
|
||
(opoint-max (point-max))
|
||
(ostart (window-start))
|
||
(osubfile Info-current-subfile))
|
||
(setq Info-search-case-fold case-fold-search)
|
||
(save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(when backward
|
||
;; Hide Info file header for backward search
|
||
(narrow-to-region (save-excursion
|
||
(goto-char (point-min))
|
||
(search-forward "\n\^_")
|
||
(1- (point)))
|
||
(point-max)))
|
||
(while (and (not give-up)
|
||
(save-match-data
|
||
(or (null found)
|
||
(if backward
|
||
(isearch-range-invisible found beg-found)
|
||
(isearch-range-invisible beg-found found))
|
||
;; Skip node header line
|
||
(and (save-excursion (forward-line -1)
|
||
(looking-at "\^_"))
|
||
(forward-line (if backward -1 1)))
|
||
;; Skip Tag Table node
|
||
(save-excursion
|
||
(and (search-backward "\^_" nil t)
|
||
(looking-at
|
||
"\^_\n\\(Tag Table\\|Local Variables\\)"))))))
|
||
(let ((search-spaces-regexp
|
||
(if (or (not isearch-mode) isearch-regexp)
|
||
Info-search-whitespace-regexp)))
|
||
(if (if backward
|
||
(re-search-backward regexp bound t)
|
||
(re-search-forward regexp bound t))
|
||
(setq found (point) beg-found (if backward (match-end 0)
|
||
(match-beginning 0)))
|
||
(setq give-up t))))))
|
||
|
||
(when (and isearch-mode Info-isearch-search
|
||
(not Info-isearch-initial-node)
|
||
(not bound)
|
||
(or give-up (and found (not (and (> found opoint-min)
|
||
(< found opoint-max))))))
|
||
(signal 'search-failed (list regexp "initial node")))
|
||
|
||
;; If no subfiles, give error now.
|
||
(if give-up
|
||
(if (null Info-current-subfile)
|
||
(let ((search-spaces-regexp
|
||
(if (or (not isearch-mode) isearch-regexp)
|
||
Info-search-whitespace-regexp)))
|
||
(if backward
|
||
(re-search-backward regexp)
|
||
(re-search-forward regexp)))
|
||
(setq found nil)))
|
||
|
||
(if (and bound (not found))
|
||
(signal 'search-failed (list regexp)))
|
||
|
||
(unless (or found bound)
|
||
(unwind-protect
|
||
;; Try other subfiles.
|
||
(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))
|
||
;; Find the subfile we just searched.
|
||
(search-forward (concat "\n" osubfile ": "))
|
||
;; Skip that one.
|
||
(forward-line (if backward 0 1))
|
||
(if backward (forward-char -1))
|
||
;; Make a list of all following subfiles.
|
||
;; Each elt has the form (VIRT-POSITION . SUBFILENAME).
|
||
(while (not (if backward (bobp) (eobp)))
|
||
(if backward
|
||
(re-search-backward "\\(^.*\\): [0-9]+$")
|
||
(re-search-forward "\\(^.*\\): [0-9]+$"))
|
||
(goto-char (+ (match-end 1) 2))
|
||
(setq list (cons (cons (+ (point-min)
|
||
(read (current-buffer)))
|
||
(match-string-no-properties 1))
|
||
list))
|
||
(goto-char (if backward
|
||
(1- (match-beginning 0))
|
||
(1+ (match-end 0)))))
|
||
;; Put in forward order
|
||
(setq list (nreverse list))))
|
||
(while list
|
||
(message "Searching subfile %s..." (cdr (car list)))
|
||
(Info-read-subfile (car (car list)))
|
||
(when backward
|
||
;; Hide Info file header for backward search
|
||
(narrow-to-region (save-excursion
|
||
(goto-char (point-min))
|
||
(search-forward "\n\^_")
|
||
(1- (point)))
|
||
(point-max))
|
||
(goto-char (point-max)))
|
||
(setq list (cdr list))
|
||
(setq give-up nil found nil)
|
||
(while (and (not give-up)
|
||
(save-match-data
|
||
(or (null found)
|
||
(if backward
|
||
(isearch-range-invisible found beg-found)
|
||
(isearch-range-invisible beg-found found))
|
||
;; Skip node header line
|
||
(and (save-excursion (forward-line -1)
|
||
(looking-at "\^_"))
|
||
(forward-line (if backward -1 1)))
|
||
;; Skip Tag Table node
|
||
(save-excursion
|
||
(and (search-backward "\^_" nil t)
|
||
(looking-at
|
||
"\^_\n\\(Tag Table\\|Local Variables\\)"))))))
|
||
(let ((search-spaces-regexp
|
||
(if (or (not isearch-mode) isearch-regexp)
|
||
Info-search-whitespace-regexp)))
|
||
(if (if backward
|
||
(re-search-backward regexp nil t)
|
||
(re-search-forward regexp nil t))
|
||
(setq found (point) beg-found (if backward (match-end 0)
|
||
(match-beginning 0)))
|
||
(setq give-up t))))
|
||
(if give-up
|
||
(setq found nil))
|
||
(if found
|
||
(setq list nil)))
|
||
(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)))))
|
||
|
||
(if (and (string= osubfile Info-current-subfile)
|
||
(> found opoint-min)
|
||
(< found opoint-max))
|
||
;; Search landed in the same node
|
||
(goto-char found)
|
||
(widen)
|
||
(goto-char found)
|
||
(save-match-data (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))
|
||
(and isearch-mode isearch-wrapped
|
||
(eq opoint (if isearch-forward opoint-min opoint-max)))
|
||
(setq Info-history (cons (list ofile onode opoint)
|
||
Info-history))))))
|
||
|
||
(defun Info-search-case-sensitively ()
|
||
"Search for a regexp case-sensitively."
|
||
(interactive)
|
||
(let ((case-fold-search nil))
|
||
(call-interactively 'Info-search)))
|
||
|
||
(defun Info-search-next ()
|
||
"Search for next regexp from a previous `Info-search' command."
|
||
(interactive)
|
||
(let ((case-fold-search Info-search-case-fold))
|
||
(if Info-search-history
|
||
(Info-search (car Info-search-history))
|
||
(call-interactively 'Info-search))))
|
||
|
||
(defun Info-search-backward (regexp &optional bound noerror count)
|
||
"Search for REGEXP in the reverse direction."
|
||
(interactive (list (read-string
|
||
(if Info-search-history
|
||
(format "Regexp search%s backward (default %s): "
|
||
(if case-fold-search "" " case-sensitively")
|
||
(car Info-search-history))
|
||
(format "Regexp search%s backward: "
|
||
(if case-fold-search "" " case-sensitively")))
|
||
nil 'Info-search-history)))
|
||
(Info-search regexp bound noerror count 'backward))
|
||
|
||
(defun Info-isearch-search ()
|
||
(if Info-isearch-search
|
||
(lambda (string &optional bound noerror count)
|
||
(if isearch-word
|
||
(Info-search (concat "\\b" (replace-regexp-in-string
|
||
"\\W+" "\\W+"
|
||
(replace-regexp-in-string
|
||
"^\\W+\\|\\W+$" "" string)
|
||
nil t)
|
||
"\\b")
|
||
bound noerror count
|
||
(unless isearch-forward 'backward))
|
||
(Info-search (if isearch-regexp string (regexp-quote string))
|
||
bound noerror count
|
||
(unless isearch-forward 'backward))
|
||
(point)))
|
||
(let ((isearch-search-fun-function nil))
|
||
(isearch-search-fun))))
|
||
|
||
(defun Info-isearch-wrap ()
|
||
(if Info-isearch-search
|
||
(if Info-isearch-initial-node
|
||
(progn
|
||
(if isearch-forward (Info-top-node) (Info-final-node))
|
||
(goto-char (if isearch-forward (point-min) (point-max))))
|
||
(setq Info-isearch-initial-node Info-current-node)
|
||
(setq isearch-wrapped nil))
|
||
(goto-char (if isearch-forward (point-min) (point-max)))))
|
||
|
||
(defun Info-isearch-push-state ()
|
||
`(lambda (cmd)
|
||
(Info-isearch-pop-state cmd ',Info-current-file ',Info-current-node)))
|
||
|
||
(defun Info-isearch-pop-state (cmd file node)
|
||
(or (and (equal Info-current-file file)
|
||
(equal Info-current-node node))
|
||
(progn (Info-find-node file node) (sit-for 0))))
|
||
|
||
(defun Info-isearch-start ()
|
||
(setq Info-isearch-initial-node nil))
|
||
|
||
(defun Info-extract-pointer (name &optional errorname)
|
||
"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."
|
||
;; Bind this in case the user sets it to nil.
|
||
(let ((case-fold-search t))
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(let ((bound (point)))
|
||
(forward-line 1)
|
||
(cond ((re-search-backward
|
||
(concat name ":" (Info-following-node-name-re)) bound t)
|
||
(match-string-no-properties 1))
|
||
((not (eq errorname t))
|
||
(error "Node has no %s"
|
||
(capitalize (or errorname name)))))))))
|
||
|
||
(defun Info-following-node-name-re (&optional allowedchars)
|
||
"Return a regexp matching a node name.
|
||
ALLOWEDCHARS, if non-nil, goes within [...] to make a regexp
|
||
saying which chars may appear in the node name.
|
||
Submatch 1 is the complete node name.
|
||
Submatch 2 if non-nil is the parenthesized file name part of the node name.
|
||
Submatch 3 is the local part of the node name.
|
||
End of submatch 0, 1, and 3 are the same, so you can safely concat."
|
||
(concat "[ \t]*" ;Skip leading space.
|
||
"\\(\\(([^)]+)\\)?" ;Node name can start with a file name.
|
||
"\\([" (or allowedchars "^,\t\n") "]*" ;Any number of allowed chars.
|
||
"[" (or allowedchars "^,\t\n") " ]" ;The last char can't be a space.
|
||
"\\|\\)\\)")) ;Allow empty node names.
|
||
|
||
;;; For compatibility; other files have used this name.
|
||
(defun Info-following-node-name ()
|
||
(and (looking-at (Info-following-node-name-re))
|
||
(match-string-no-properties 1)))
|
||
|
||
(defun Info-next ()
|
||
"Go to the next node of this node."
|
||
(interactive)
|
||
;; In case another window is currently selected
|
||
(save-window-excursion
|
||
(or (eq major-mode 'Info-mode) (pop-to-buffer "*info*"))
|
||
(Info-goto-node (Info-extract-pointer "next"))))
|
||
|
||
(defun Info-prev ()
|
||
"Go to the previous node of this node."
|
||
(interactive)
|
||
;; In case another window is currently selected
|
||
(save-window-excursion
|
||
(or (eq major-mode 'Info-mode) (pop-to-buffer "*info*"))
|
||
(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)
|
||
;; In case another window is currently selected
|
||
(save-window-excursion
|
||
(or (eq major-mode 'Info-mode) (pop-to-buffer "*info*"))
|
||
(let ((old-node Info-current-node)
|
||
(old-file Info-current-file)
|
||
(node (Info-extract-pointer "up")) p)
|
||
(and same-file
|
||
(string-match "^(" node)
|
||
(error "Up node is in another Info file"))
|
||
(Info-goto-node node)
|
||
(setq p (point))
|
||
(goto-char (point-min))
|
||
(if (and (stringp old-file)
|
||
(search-forward "\n* Menu:" nil t)
|
||
(re-search-forward
|
||
(if (string-equal old-node "Top")
|
||
(concat "\n\\*[^:]+: +(" (file-name-nondirectory old-file) ")")
|
||
(concat "\n\\* +\\(" (regexp-quote old-node)
|
||
":\\|[^:]+: +" (regexp-quote old-node) "\\)"))
|
||
nil t))
|
||
(progn (beginning-of-line) (if (looking-at "^\\* ") (forward-char 2)))
|
||
(goto-char p)
|
||
(Info-restore-point Info-history)))))
|
||
|
||
(defun Info-history-back ()
|
||
"Go back in the history to the last node visited."
|
||
(interactive)
|
||
(or Info-history
|
||
(error "This is the first Info node you looked at"))
|
||
(let ((history-forward
|
||
(cons (list Info-current-file Info-current-node (point))
|
||
Info-history-forward))
|
||
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))
|
||
(setq Info-history-forward history-forward)
|
||
(goto-char opoint)))
|
||
|
||
(defalias 'Info-last 'Info-history-back)
|
||
|
||
(defun Info-history-forward ()
|
||
"Go forward in the history of visited nodes."
|
||
(interactive)
|
||
(or Info-history-forward
|
||
(error "This is the last Info node you looked at"))
|
||
(let ((history-forward (cdr Info-history-forward))
|
||
filename nodename opoint)
|
||
(setq filename (car (car Info-history-forward)))
|
||
(setq nodename (car (cdr (car Info-history-forward))))
|
||
(setq opoint (car (cdr (cdr (car Info-history-forward)))))
|
||
(Info-find-node filename nodename)
|
||
(setq Info-history-forward history-forward)
|
||
(goto-char opoint)))
|
||
|
||
;;;###autoload
|
||
(defun Info-directory ()
|
||
"Go to the Info directory node."
|
||
(interactive)
|
||
(Info-find-node "dir" "top"))
|
||
|
||
(defun Info-history ()
|
||
"Go to a node with a menu of visited nodes."
|
||
(interactive)
|
||
(let ((curr-file Info-current-file)
|
||
(curr-node Info-current-node)
|
||
p)
|
||
(with-current-buffer (get-buffer-create " *info-history*")
|
||
(let ((inhibit-read-only t))
|
||
(erase-buffer)
|
||
(goto-char (point-min))
|
||
(insert "\n\^_\nFile: history, Node: Top, Up: (dir)\n\n")
|
||
(insert "Recently Visited Nodes\n**********************\n\n")
|
||
(insert "* Menu:\n\n")
|
||
(let ((hl (delete '("history" "Top") Info-history-list)))
|
||
(while hl
|
||
(let ((file (nth 0 (car hl)))
|
||
(node (nth 1 (car hl))))
|
||
(if (and (equal file curr-file)
|
||
(equal node curr-node))
|
||
(setq p (point)))
|
||
(if (stringp file)
|
||
(insert "* " node ": ("
|
||
(propertize (or (file-name-directory file) "") 'invisible t)
|
||
(file-name-nondirectory file)
|
||
")" node ".\n")))
|
||
(setq hl (cdr hl))))))
|
||
(Info-find-node 'history "Top")
|
||
(goto-char (or p (point-min)))))
|
||
|
||
(defun Info-toc ()
|
||
"Go to a node with table of contents of the current Info file.
|
||
Table of contents is created from the tree structure of menus."
|
||
(interactive)
|
||
(if (stringp Info-current-file)
|
||
(let ((curr-file (substring-no-properties Info-current-file))
|
||
(curr-node (substring-no-properties Info-current-node))
|
||
p)
|
||
(with-current-buffer (get-buffer-create " *info-toc*")
|
||
(let ((inhibit-read-only t)
|
||
(node-list (Info-build-toc curr-file)))
|
||
(erase-buffer)
|
||
(goto-char (point-min))
|
||
(insert "\n\^_\nFile: toc, Node: Top, Up: (dir)\n\n")
|
||
(insert "Table of Contents\n*****************\n\n")
|
||
(insert "*Note Top: (" curr-file ")Top.\n")
|
||
(Info-insert-toc
|
||
(nth 2 (assoc "Top" node-list)) ; get Top nodes
|
||
node-list 0 curr-file))
|
||
(if (not (bobp))
|
||
(let ((Info-hide-note-references 'hide)
|
||
(Info-fontify-visited-nodes nil))
|
||
(Info-mode)
|
||
(setq Info-current-file 'toc Info-current-node "Top")
|
||
(goto-char (point-min))
|
||
(narrow-to-region (or (re-search-forward "\n[\^_\f]\n" nil t)
|
||
(point-min))
|
||
(point-max))
|
||
(Info-fontify-node)
|
||
(widen)))
|
||
(goto-char (point-min))
|
||
(if (setq p (search-forward (concat "*Note " curr-node ":") nil t))
|
||
(setq p (- p (length curr-node) 2))))
|
||
(Info-find-node 'toc "Top")
|
||
(goto-char (or p (point-min))))))
|
||
|
||
(defun Info-insert-toc (nodes node-list level curr-file)
|
||
"Insert table of contents with references to nodes."
|
||
(let ((section "Top"))
|
||
(while nodes
|
||
(let ((node (assoc (car nodes) node-list)))
|
||
(unless (member (nth 1 node) (list nil section))
|
||
(insert (setq section (nth 1 node)) "\n"))
|
||
(insert (make-string level ?\t))
|
||
(insert "*Note " (car nodes) ": (" curr-file ")" (car nodes) ".\n")
|
||
(Info-insert-toc (nth 2 node) node-list (1+ level) curr-file)
|
||
(setq nodes (cdr nodes))))))
|
||
|
||
(defun Info-build-toc (file)
|
||
"Build table of contents from menus of Info FILE and its subfiles."
|
||
(with-temp-buffer
|
||
(let* ((file (and (stringp file) (Info-find-file file)))
|
||
(default-directory (or (and (stringp file)
|
||
(file-name-directory file))
|
||
default-directory))
|
||
(main-file (and (stringp file) file))
|
||
(sections '(("Top" "Top")))
|
||
nodes subfiles)
|
||
(while (or main-file subfiles)
|
||
(or main-file (message "Searching subfile %s..." (car subfiles)))
|
||
(erase-buffer)
|
||
(info-insert-file-contents (or main-file (car subfiles)))
|
||
(goto-char (point-min))
|
||
(while (and (search-forward "\n\^_\nFile:" nil 'move)
|
||
(search-forward "Node: " nil 'move))
|
||
(let ((nodename (substring-no-properties (Info-following-node-name)))
|
||
(bound (- (or (save-excursion (search-forward "\n\^_" nil t))
|
||
(point-max)) 2))
|
||
(section "Top")
|
||
menu-items)
|
||
(when (and (not (Info-index-node nodename file))
|
||
(re-search-forward "^\\* Menu:" bound t))
|
||
(forward-line 1)
|
||
(beginning-of-line)
|
||
(setq bound (or (and (equal nodename "Top")
|
||
(save-excursion
|
||
(re-search-forward
|
||
"^[ \t-]*The Detailed Node Listing" nil t)))
|
||
bound))
|
||
(while (< (point) bound)
|
||
(cond
|
||
;; Menu item line
|
||
((looking-at "^\\* +[^:]+:")
|
||
(beginning-of-line)
|
||
(forward-char 2)
|
||
(let ((menu-node-name (substring-no-properties
|
||
(Info-extract-menu-node-name))))
|
||
(setq menu-items (cons menu-node-name menu-items))
|
||
(if (equal nodename "Top")
|
||
(setq sections
|
||
(cons (list menu-node-name section) sections)))))
|
||
;; Other non-empty strings in the Top node are section names
|
||
((and (equal nodename "Top")
|
||
(looking-at "^\\([^ \t\n*=.-][^:\n]*\\)"))
|
||
(setq section (match-string-no-properties 1))))
|
||
(forward-line 1)
|
||
(beginning-of-line)))
|
||
(setq nodes (cons (list nodename
|
||
(cadr (assoc nodename sections))
|
||
(nreverse menu-items))
|
||
nodes))
|
||
(goto-char bound)))
|
||
(if main-file
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(if (search-forward "\n\^_\nIndirect:" nil t)
|
||
(let ((bound (save-excursion (search-forward "\n\^_" nil t))))
|
||
(while (re-search-forward "^\\(.*\\): [0-9]+$" bound t)
|
||
(setq subfiles (cons (match-string-no-properties 1)
|
||
subfiles)))))
|
||
(setq subfiles (nreverse subfiles)
|
||
main-file nil))
|
||
(setq subfiles (cdr subfiles))))
|
||
(message "")
|
||
(nreverse nodes))))
|
||
|
||
(defun Info-follow-reference (footnotename &optional fork)
|
||
"Follow cross reference named FOOTNOTENAME to the node it refers to.
|
||
FOOTNOTENAME may be an abbreviation of the reference name.
|
||
If FORK is non-nil (interactively with a prefix arg), show the node in
|
||
a new Info buffer. If FORK is a string, it is the name to use for the
|
||
new buffer."
|
||
(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 (match-string-no-properties 1))
|
||
;; 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.
|
||
(or (assoc-string str completions t)
|
||
(push str 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 completions)))
|
||
(if completions
|
||
(let ((input (completing-read (if default
|
||
(concat
|
||
"Follow reference named (default "
|
||
default "): ")
|
||
"Follow reference named: ")
|
||
completions nil t)))
|
||
(list (if (equal input "")
|
||
default input) current-prefix-arg))
|
||
(error "No cross-references in this node"))))
|
||
|
||
(unless footnotename
|
||
(error "No reference was specified"))
|
||
|
||
(let (target 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
|
||
;; Move point to the beginning of reference if point is on reference
|
||
(or (looking-at "\\*note[ \n\t]+")
|
||
(and (looking-back "\\*note[ \n\t]+")
|
||
(goto-char (match-beginning 0)))
|
||
(if (and (save-excursion
|
||
(goto-char (+ (point) 5)) ; skip a possible *note
|
||
(re-search-backward "\\*note[ \n\t]+" nil t)
|
||
(looking-at str))
|
||
(<= (point) (match-end 0)))
|
||
(goto-char (match-beginning 0))))
|
||
;; Go to the reference closest to point
|
||
(let ((next-ref (save-excursion (and (re-search-forward str nil t)
|
||
(+ (match-beginning 0) 5))))
|
||
(prev-ref (save-excursion (and (re-search-backward str nil t)
|
||
(+ (match-beginning 0) 5)))))
|
||
(goto-char (cond ((and next-ref prev-ref)
|
||
(if (< (abs (- next-ref (point)))
|
||
(abs (- prev-ref (point))))
|
||
next-ref prev-ref))
|
||
((or next-ref prev-ref))
|
||
((error "No cross-reference named %s" footnotename))))
|
||
(setq target (Info-extract-menu-node-name 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 fork)))
|
||
|
||
(defconst Info-menu-entry-name-re "\\(?:[^:]\\|:[^:,.;() \t\n]\\)*"
|
||
;; We allow newline because this is also used in Info-follow-reference,
|
||
;; where the xref name might be wrapped over two lines.
|
||
"Regexp that matches a menu entry name upto but not including the colon.
|
||
Because of ambiguities, this should be concatenated with something like
|
||
`:' and `Info-following-node-name-re'.")
|
||
|
||
(defun Info-extract-menu-node-name (&optional multi-line index-node)
|
||
(skip-chars-forward " \t\n")
|
||
(when (looking-at (concat Info-menu-entry-name-re ":\\(:\\|"
|
||
(Info-following-node-name-re
|
||
(cond
|
||
(index-node "^,\t\n")
|
||
(multi-line "^.,\t")
|
||
(t "^.,\t\n")))
|
||
"\\)"
|
||
(if index-node
|
||
"\\.\\(?:[ \t\n]+(line +\\([0-9]+\\))\\)?"
|
||
"")))
|
||
(if index-node
|
||
(setq Info-point-loc
|
||
(if (match-beginning 5)
|
||
(string-to-number (match-string 5))
|
||
(buffer-substring-no-properties
|
||
(match-beginning 0) (1- (match-beginning 1)))))
|
||
;;; Uncomment next line to use names of cross-references in non-index nodes:
|
||
;;; (setq Info-point-loc
|
||
;;; (buffer-substring (match-beginning 0) (1- (match-beginning 1))))
|
||
)
|
||
(replace-regexp-in-string
|
||
"[ \n]+" " "
|
||
(or (match-string-no-properties 2)
|
||
;; If the node name is the menu entry name (using `entry::').
|
||
(buffer-substring-no-properties
|
||
(match-beginning 0) (1- (match-beginning 1)))))))
|
||
|
||
;; 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)
|
||
(defvar Info-complete-next-re nil)
|
||
(defvar Info-complete-nodes nil)
|
||
(defvar Info-complete-cache nil)
|
||
|
||
(defconst Info-node-spec-re
|
||
(concat (Info-following-node-name-re "^.,:") "[,:.]")
|
||
"Regexp to match the text after a : until the terminating `.'.")
|
||
|
||
(defun Info-complete-menu-item (string predicate action)
|
||
;; This uses two dynamically bound variables:
|
||
;; - `Info-complete-menu-buffer' which contains the buffer in which
|
||
;; is the menu of items we're trying to complete.
|
||
;; - `Info-complete-next-re' which, if non-nil, indicates that we should
|
||
;; also look for menu items in subsequent nodes as long as those
|
||
;; nodes' names match `Info-complete-next-re'. This feature is currently
|
||
;; not used.
|
||
;; - `Info-complete-nodes' which, if non-nil, indicates that we should
|
||
;; also look for menu items in these nodes. This feature is currently
|
||
;; only used for completion in Info-index.
|
||
|
||
;; Note that `Info-complete-menu-buffer' could be current already,
|
||
;; so we want to save point.
|
||
(save-excursion
|
||
(set-buffer Info-complete-menu-buffer)
|
||
(let ((completion-ignore-case t)
|
||
(case-fold-search t)
|
||
(orignode Info-current-node)
|
||
nextnode)
|
||
(goto-char (point-min))
|
||
(search-forward "\n* Menu:")
|
||
(if (not (memq action '(nil t)))
|
||
(re-search-forward
|
||
(concat "\n\\* +" (regexp-quote string) ":") nil t)
|
||
(let ((pattern (concat "\n\\* +\\("
|
||
(regexp-quote string)
|
||
Info-menu-entry-name-re "\\):" Info-node-spec-re))
|
||
completions
|
||
(complete-nodes Info-complete-nodes))
|
||
;; Check the cache.
|
||
(if (and (equal (nth 0 Info-complete-cache) Info-current-file)
|
||
(equal (nth 1 Info-complete-cache) Info-current-node)
|
||
(equal (nth 2 Info-complete-cache) Info-complete-next-re)
|
||
(equal (nth 5 Info-complete-cache) Info-complete-nodes)
|
||
(let ((prev (nth 3 Info-complete-cache)))
|
||
(eq t (compare-strings string 0 (length prev)
|
||
prev 0 nil t))))
|
||
;; We can reuse the previous list.
|
||
(setq completions (nth 4 Info-complete-cache))
|
||
;; The cache can't be used.
|
||
(while
|
||
(progn
|
||
(while (re-search-forward pattern nil t)
|
||
(push (match-string-no-properties 1)
|
||
completions))
|
||
;; Check subsequent nodes if applicable.
|
||
(or (and Info-complete-next-re
|
||
(setq nextnode (Info-extract-pointer "next" t))
|
||
(string-match Info-complete-next-re nextnode))
|
||
(and complete-nodes
|
||
(setq complete-nodes (cdr complete-nodes)
|
||
nextnode (car complete-nodes)))))
|
||
(Info-goto-node nextnode))
|
||
;; Go back to the start node (for the next completion).
|
||
(unless (equal Info-current-node orignode)
|
||
(Info-goto-node orignode))
|
||
;; Update the cache.
|
||
(set (make-local-variable 'Info-complete-cache)
|
||
(list Info-current-file Info-current-node
|
||
Info-complete-next-re string completions
|
||
Info-complete-nodes)))
|
||
(if action
|
||
(all-completions string completions predicate)
|
||
(try-completion string completions predicate)))))))
|
||
|
||
|
||
(defun Info-menu (menu-item &optional fork)
|
||
"Go to the node pointed to by the menu item named (or abbreviated) MENU-ITEM.
|
||
The menu item should one of those listed in the current node's menu.
|
||
Completion is allowed, and the default menu item is the one point is on.
|
||
If FORK is non-nil (interactively with a prefix arg), show the node in
|
||
a new Info buffer. If FORK is a string, it is the name to use for the
|
||
new buffer."
|
||
(interactive
|
||
(let ((completions '())
|
||
;; If point is within a menu item, use that item as the default
|
||
(default nil)
|
||
(p (point))
|
||
beg
|
||
(last nil)
|
||
(case-fold-search t))
|
||
(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 (concat "\n\\* +\\("
|
||
Info-menu-entry-name-re
|
||
"\\):") 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
|
||
(let ((case-fold-search t))
|
||
(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 nil (Info-index-node))))))
|
||
|
||
;; If COUNT is nil, use the last item in the menu.
|
||
(defun Info-extract-menu-counting (count)
|
||
(let ((case-fold-search t))
|
||
(save-excursion
|
||
(let ((case-fold-search t))
|
||
(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 nil (Info-index-node))))))
|
||
|
||
(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 nil)
|
||
(case-fold-search t))
|
||
;; 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 (Info-index-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)
|
||
(let ((case-fold-search t))
|
||
;; 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 (Info-index-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))
|
||
(case-fold-search 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 (Info-index-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 ()
|
||
"Go to the node of the next menu item."
|
||
(interactive)
|
||
;; Bind this in case the user sets it to nil.
|
||
(let* ((case-fold-search t)
|
||
(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 ()
|
||
"Go to the node of the previous menu item."
|
||
(interactive)
|
||
(save-excursion
|
||
(forward-line 1)
|
||
;; Bind this in case the user sets it to nil.
|
||
(let* ((case-fold-search t)
|
||
(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 (Info-no-error (Info-extract-pointer "prev"))
|
||
(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))
|
||
(let ((case-fold-search t))
|
||
(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, unless
|
||
`Info-scroll-prefer-subnodes' is nil.
|
||
|
||
When you scroll past the end of a node, that goes to the next node if
|
||
`Info-scroll-prefer-subnodes' is non-nil and to the first subnode otherwise;
|
||
if this node has no successor, it moves to the parent node's successor,
|
||
and so on. If `Info-scroll-prefer-subnodes' is non-nil and 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* ((case-fold-search t)
|
||
(virtual-end (save-excursion
|
||
(goto-char (point-min))
|
||
(if (and Info-scroll-prefer-subnodes
|
||
(search-forward "\n* Menu:" nil t))
|
||
(point)
|
||
(point-max)))))
|
||
(if (or (< virtual-end (window-start))
|
||
(pos-visible-in-window-p virtual-end))
|
||
(cond
|
||
(Info-scroll-prefer-subnodes (Info-next-preorder))
|
||
((Info-no-error (Info-goto-node (Info-extract-menu-counting 1))))
|
||
(t (Info-next-preorder)))
|
||
(scroll-up))))
|
||
|
||
(defun Info-mouse-scroll-up (e)
|
||
"Scroll one screenful forward in Info, using the mouse.
|
||
See `Info-scroll-up'."
|
||
(interactive "e")
|
||
(save-selected-window
|
||
(if (eventp e)
|
||
(select-window (posn-window (event-start e))))
|
||
(Info-scroll-up)))
|
||
|
||
(defun Info-scroll-down ()
|
||
"Scroll one screenful back in Info, considering all nodes as one sequence.
|
||
If point is within the menu of a node, and `Info-scroll-prefer-subnodes'
|
||
is non-nil, 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* ((case-fold-search t)
|
||
(current-point (point))
|
||
(virtual-end
|
||
(and Info-scroll-prefer-subnodes
|
||
(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) nil t))
|
||
(Info-last-preorder)
|
||
(scroll-down))))
|
||
|
||
(defun Info-mouse-scroll-down (e)
|
||
"Scroll one screenful backward in Info, using the mouse.
|
||
See `Info-scroll-down'."
|
||
(interactive "e")
|
||
(save-selected-window
|
||
(if (eventp e)
|
||
(select-window (posn-window (event-start e))))
|
||
(Info-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]+\\([^:]+\\):\\|^\\* .*:\\|[hf]t?tp://")
|
||
(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 (or (match-beginning 1) (match-beginning 0)))
|
||
(if (looking-at "\\* Menu:")
|
||
(if recur
|
||
(error "No cross references in this node")
|
||
(Info-next-reference t))
|
||
(if (looking-at "^\\* ")
|
||
(forward-char 2)))))
|
||
|
||
(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]+\\([^:]+\\):\\|^\\* .*:\\|[hf]t?tp://")
|
||
(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 (or (match-beginning 1) (match-beginning 0)))
|
||
(if (looking-at "\\* Menu:")
|
||
(if recur
|
||
(error "No cross references in this node")
|
||
(Info-prev-reference t))
|
||
(if (looking-at "^\\* ")
|
||
(forward-char 2)))))
|
||
|
||
(defvar Info-index-nodes nil
|
||
"Alist of cached index node names of visited Info files.
|
||
Each element has the form (INFO-FILE INDEX-NODE-NAMES-LIST).")
|
||
|
||
(defun Info-index-nodes (&optional file)
|
||
"Return a list of names of all index nodes in Info FILE.
|
||
If FILE is omitted, it defaults to the current Info file.
|
||
First look in a list of cached index node names. Then scan Info
|
||
file and its subfiles for nodes with the index cookie. Then try
|
||
to find index nodes starting from 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\"."
|
||
(or file (setq file Info-current-file))
|
||
(or (assoc file Info-index-nodes)
|
||
;; Skip virtual Info files
|
||
(and (member file '("dir" apropos history toc))
|
||
(setq Info-index-nodes (cons (cons file nil) Info-index-nodes)))
|
||
(not (stringp file))
|
||
(if Info-file-supports-index-cookies
|
||
;; Find nodes with index cookie
|
||
(let* ((default-directory (or (and (stringp file)
|
||
(file-name-directory
|
||
(setq file (Info-find-file file))))
|
||
default-directory))
|
||
Info-history Info-history-list Info-fontify-maximum-menu-size
|
||
(main-file file) subfiles nodes node)
|
||
(condition-case nil
|
||
(with-temp-buffer
|
||
(while (or main-file subfiles)
|
||
(erase-buffer)
|
||
(info-insert-file-contents (or main-file (car subfiles)))
|
||
(goto-char (point-min))
|
||
(while (search-forward "\0\b[index\0\b]" nil 'move)
|
||
(save-excursion
|
||
(re-search-backward "^\^_")
|
||
(search-forward "Node: ")
|
||
(setq nodes (cons (Info-following-node-name) nodes))))
|
||
(if main-file
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(if (search-forward "\n\^_\nIndirect:" nil t)
|
||
(let ((bound (save-excursion (search-forward "\n\^_" nil t))))
|
||
(while (re-search-forward "^\\(.*\\): [0-9]+$" bound t)
|
||
(setq subfiles (cons (match-string-no-properties 1)
|
||
subfiles)))))
|
||
(setq subfiles (nreverse subfiles)
|
||
main-file nil))
|
||
(setq subfiles (cdr subfiles)))))
|
||
(error nil))
|
||
(if nodes
|
||
(setq nodes (nreverse nodes)
|
||
Info-index-nodes (cons (cons file nodes) Info-index-nodes)))
|
||
nodes)
|
||
;; Else find nodes with the word "Index" in the node name
|
||
(let ((case-fold-search t)
|
||
Info-history Info-history-list Info-fontify-maximum-menu-size
|
||
nodes node)
|
||
(condition-case nil
|
||
(with-temp-buffer
|
||
(Info-mode)
|
||
(Info-find-node file "Top")
|
||
(when (and (search-forward "\n* menu:" nil t)
|
||
(re-search-forward "\n\\* \\(.*\\<Index\\>\\)" nil t))
|
||
(goto-char (match-beginning 1))
|
||
(setq nodes (list (Info-extract-menu-node-name)))
|
||
(Info-goto-node (car nodes))
|
||
(while (and (setq node (Info-extract-pointer "next" t))
|
||
(string-match "\\<Index\\>" node))
|
||
(setq nodes (cons node nodes))
|
||
(Info-goto-node node))))
|
||
(error nil))
|
||
(if nodes
|
||
(setq nodes (nreverse nodes)
|
||
Info-index-nodes (cons (cons file nodes) Info-index-nodes)))
|
||
nodes))
|
||
;; If file has no index nodes, still add it to the cache
|
||
(setq Info-index-nodes (cons (cons file nil) Info-index-nodes)))
|
||
(cdr (assoc file Info-index-nodes)))
|
||
|
||
(defun Info-index-node (&optional node file)
|
||
"Return non-nil value if NODE is an index node.
|
||
If NODE is nil, check the current Info node.
|
||
If FILE is nil, check the current Info file."
|
||
(if (or (and node (not (equal node Info-current-node)))
|
||
(assoc (or file Info-current-file) Info-index-nodes))
|
||
(member (or node Info-current-node) (Info-index-nodes file))
|
||
;; Don't search all index nodes if request is only for the current node
|
||
;; and file is not in the cache of index nodes
|
||
(if Info-file-supports-index-cookies
|
||
(save-excursion
|
||
(goto-char (+ (or (save-excursion
|
||
(search-backward "\n\^_" nil t))
|
||
(point-min)) 2))
|
||
(search-forward "\0\b[index\0\b]"
|
||
(or (save-excursion
|
||
(search-forward "\n\^_" nil t))
|
||
(point-max)) t))
|
||
(save-match-data
|
||
(string-match "\\<Index\\>" (or node Info-current-node ""))))))
|
||
|
||
(defun Info-goto-index ()
|
||
"Go to the first index node."
|
||
(let ((node (car (Info-index-nodes))))
|
||
(or node (error "No index"))
|
||
(Info-goto-node node)))
|
||
|
||
;;;###autoload
|
||
(defun Info-index (topic)
|
||
"Look up a string TOPIC in the index for this manual and go to that entry.
|
||
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 \\<Info-mode-map>\\[Info-index-next] command to see the other matches.
|
||
Give an empty topic name to go to the Index node itself."
|
||
(interactive
|
||
(list
|
||
(let ((completion-ignore-case t)
|
||
(Info-complete-menu-buffer (clone-buffer))
|
||
(Info-complete-nodes (Info-index-nodes))
|
||
(Info-history-list nil))
|
||
(if (equal Info-current-file "dir")
|
||
(error "The Info directory node has no index; use m to select a manual"))
|
||
(unwind-protect
|
||
(with-current-buffer Info-complete-menu-buffer
|
||
(Info-goto-index)
|
||
(completing-read "Index topic: " 'Info-complete-menu-item))
|
||
(kill-buffer Info-complete-menu-buffer)))))
|
||
(if (equal Info-current-file "dir")
|
||
(error "The Info directory node has no index; use m to select a manual"))
|
||
;; Strip leading colon in topic; index format does not allow them.
|
||
(if (and (stringp topic)
|
||
(> (length topic) 0)
|
||
(= (aref topic 0) ?:))
|
||
(setq topic (substring topic 1)))
|
||
(let ((orignode Info-current-node)
|
||
(pattern (format "\n\\* +\\([^\n]*%s[^\n]*\\):[ \t]+\\([^\n]*\\)\\.\\(?:[ \t\n]*(line +\\([0-9]+\\))\\)?"
|
||
(regexp-quote topic)))
|
||
node (nodes (Info-index-nodes))
|
||
(ohist-list Info-history-list)
|
||
(case-fold-search t))
|
||
(Info-goto-index)
|
||
(or (equal topic "")
|
||
(let ((matches nil)
|
||
(exact nil)
|
||
;; 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-index call, above, we do update the history
|
||
;; because that is what the user's previous node choice into it.
|
||
(Info-history nil)
|
||
found)
|
||
(while
|
||
(progn
|
||
(goto-char (point-min))
|
||
(while (re-search-forward pattern nil t)
|
||
(push (list (match-string-no-properties 1)
|
||
(match-string-no-properties 2)
|
||
Info-current-node
|
||
(string-to-number (concat "0"
|
||
(match-string 3))))
|
||
matches))
|
||
(setq nodes (cdr nodes) node (car nodes)))
|
||
(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-history-list ohist-list)
|
||
(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 \\<Info-mode-map>\\[Info-index] 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 (1- (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)
|
||
(format "(%s total; use `%s' for next)"
|
||
(length Info-index-alternatives)
|
||
(key-description (where-is-internal
|
||
'Info-index-next overriding-local-map
|
||
t)))
|
||
"(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\\( \\|$\\)"
|
||
(regexp-quote name)) nil t)
|
||
;; Find a function definition with a return type.
|
||
(re-search-forward (format
|
||
"[a-zA-Z]+: [a-zA-Z0-9_ *&]+ %s\\( \\|$\\)"
|
||
(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)
|
||
;; Try again without the " <1>" makeinfo can append
|
||
(and (string-match "\\`\\(.*\\) <[0-9]+>\\'" name)
|
||
(Info-find-index-name (match-string 1 name))))
|
||
(progn (beginning-of-line) t) ;; non-nil for recursive call
|
||
(goto-char (point-min)))))
|
||
|
||
;;;###autoload
|
||
(defun info-apropos (string)
|
||
"Grovel indices of all known Info files on your system for STRING.
|
||
Build a menu of the possible matches."
|
||
(interactive "sIndex apropos: ")
|
||
(unless (string= string "")
|
||
(let ((pattern (format "\n\\* +\\([^\n]*%s[^\n]*\\):[ \t]+\\([^\n]+\\)\\.\\(?:[ \t\n]*(line +\\([0-9]+\\))\\)?"
|
||
(regexp-quote string)))
|
||
(ohist Info-history)
|
||
(ohist-list Info-history-list)
|
||
(current-node Info-current-node)
|
||
(current-file Info-current-file)
|
||
manuals matches node nodes)
|
||
(let ((Info-fontify-maximum-menu-size nil))
|
||
(Info-directory)
|
||
;; current-node and current-file are nil when they invoke info-apropos
|
||
;; as the first Info command, i.e. info-apropos loads info.el. In that
|
||
;; case, we use (DIR)Top instead, to avoid signalling an error after
|
||
;; the search is complete.
|
||
(when (null current-node)
|
||
(setq current-file Info-current-file)
|
||
(setq current-node Info-current-node))
|
||
(message "Searching indices...")
|
||
(goto-char (point-min))
|
||
(re-search-forward "\\* Menu: *\n" nil t)
|
||
(while (re-search-forward "\\*.*: *(\\([^)]+\\))" nil t)
|
||
;; add-to-list makes sure we don't have duplicates in `manuals',
|
||
;; so that the following dolist loop runs faster.
|
||
(add-to-list 'manuals (match-string 1)))
|
||
(dolist (manual (nreverse manuals))
|
||
(message "Searching %s" manual)
|
||
(condition-case err
|
||
(if (setq nodes (Info-index-nodes (Info-find-file manual)))
|
||
(save-excursion
|
||
(Info-find-node manual (car nodes))
|
||
(while
|
||
(progn
|
||
(goto-char (point-min))
|
||
(while (re-search-forward pattern nil t)
|
||
(setq matches
|
||
(cons (list manual
|
||
(match-string-no-properties 1)
|
||
(match-string-no-properties 2)
|
||
(match-string-no-properties 3))
|
||
matches)))
|
||
(setq nodes (cdr nodes) node (car nodes)))
|
||
(Info-goto-node node))))
|
||
(error
|
||
(message "%s" (if (eq (car-safe err) 'error)
|
||
(nth 1 err) err))
|
||
(sit-for 1 t)))))
|
||
(Info-find-node current-file current-node)
|
||
(setq Info-history ohist
|
||
Info-history-list ohist-list)
|
||
(message "Searching indices...done")
|
||
(if (null matches)
|
||
(message "No matches found")
|
||
(with-current-buffer (get-buffer-create " *info-apropos*")
|
||
(erase-buffer)
|
||
(insert "\n\^_\nFile: apropos, Node: Index, Up: (dir)\n")
|
||
(insert "* Menu: \nNodes whose indices contain `" string "':\n\n")
|
||
(dolist (entry (nreverse matches))
|
||
(insert
|
||
(format "* %-38s (%s)%s.%s\n"
|
||
(concat (nth 1 entry) " [" (nth 0 entry) "]:")
|
||
(nth 0 entry)
|
||
(nth 2 entry)
|
||
(if (nth 3 entry)
|
||
(concat " (line " (nth 3 entry) ")")
|
||
"")))))
|
||
(Info-find-node 'apropos "Index")
|
||
(setq Info-complete-cache nil)))))
|
||
|
||
(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 ?\s (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.
|
||
ERRORSTRING 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")
|
||
(mouse-set-point click)
|
||
(and (not (Info-try-follow-nearest-node))
|
||
(save-excursion (forward-line 1) (eobp))
|
||
(Info-next-preorder)))
|
||
|
||
(defun Info-follow-nearest-node (&optional fork)
|
||
"Follow a node reference near point.
|
||
If point is on a reference, follow that reference. Otherwise,
|
||
if point is in a menu item description, follow that menu item.
|
||
|
||
If FORK is non-nil (interactively with a prefix arg), show the node in
|
||
a new Info buffer.
|
||
If FORK is a string, it is the name to use for the new buffer."
|
||
(interactive "P")
|
||
(or (Info-try-follow-nearest-node fork)
|
||
(when (save-excursion
|
||
(search-backward "\n* menu:" nil t))
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(while (not (or (bobp) (looking-at "[^ \t]\\|[ \t]*$")))
|
||
(beginning-of-line 0))
|
||
(when (looking-at "\\* +\\([^\t\n]*\\):")
|
||
(Info-goto-node
|
||
(Info-extract-menu-item (match-string-no-properties 1)) fork)
|
||
t)))
|
||
(error "Point neither on reference nor in menu item description")))
|
||
|
||
;; Common subroutine.
|
||
(defun Info-try-follow-nearest-node (&optional fork)
|
||
"Follow a node reference near point. Return non-nil if successful.
|
||
If FORK is non-nil, it i spassed to `Info-goto-node'."
|
||
(let (node)
|
||
(cond
|
||
((Info-get-token (point) "[hf]t?tp://" "[hf]t?tp://\\([^ \t\n\"`({<>})']+\\)")
|
||
(setq node t)
|
||
(browse-url (browse-url-url-at-point)))
|
||
((setq node (Info-get-token (point) "\\*note[ \n\t]+"
|
||
"\\*note[ \n\t]+\\([^:]*\\):\\(:\\|[ \n\t]*(\\)?"))
|
||
(Info-follow-reference node fork))
|
||
;; menu item: node name
|
||
((setq node (Info-get-token (point) "\\* +" "\\* +\\([^:]*\\)::"))
|
||
(Info-goto-node node fork))
|
||
;; menu item: node name or index entry
|
||
((Info-get-token (point) "\\* +" "\\* +\\(.*\\): ")
|
||
(beginning-of-line)
|
||
(forward-char 2)
|
||
(setq node (Info-extract-menu-node-name nil (Info-index-node)))
|
||
(Info-goto-node node fork))
|
||
((setq node (Info-get-token (point) "Up: " "Up: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node node fork))
|
||
((setq node (Info-get-token (point) "Next: " "Next: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node node fork))
|
||
((setq node (Info-get-token (point) "File: " "File: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node "Top" fork))
|
||
((setq node (Info-get-token (point) "Prev: " "Prev: \\([^,\n\t]*\\)"))
|
||
(Info-goto-node node fork)))
|
||
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 [(shift tab)] 'Info-prev-reference)
|
||
(define-key Info-mode-map [backtab] '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-history-back)
|
||
(define-key Info-mode-map "L" 'Info-history)
|
||
(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 "r" 'Info-history-forward)
|
||
(define-key Info-mode-map "s" 'Info-search)
|
||
(define-key Info-mode-map "S" 'Info-search-case-sensitively)
|
||
;; 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 "T" 'Info-toc)
|
||
(define-key Info-mode-map "u" 'Info-up)
|
||
;; `w' for consistency with `dired-copy-filename-as-kill'.
|
||
(define-key Info-mode-map "w" 'Info-copy-current-node-name)
|
||
(define-key Info-mode-map "c" 'Info-copy-current-node-name)
|
||
;; `^' for consistency with `dired-up-directory'.
|
||
(define-key Info-mode-map "^" '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)
|
||
(define-key Info-mode-map [follow-link] 'mouse-face)
|
||
)
|
||
|
||
(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 :active (Info-check-pointer "up")
|
||
:help "Go up in the Info tree"]
|
||
["Next" Info-next :active (Info-check-pointer "next")
|
||
:help "Go to the next node"]
|
||
["Previous" Info-prev :active (Info-check-pointer "prev[ious]*")
|
||
:help "Go to the previous node"]
|
||
["Backward" Info-backward-node
|
||
:help "Go backward one node, considering all as a sequence"]
|
||
["Forward" Info-forward-node
|
||
:help "Go forward one node, considering all as a sequence"]
|
||
["Beginning" beginning-of-buffer
|
||
:help "Go to beginning of this node"]
|
||
["Top" Info-top-node
|
||
:help "Go to top node of file"]
|
||
["Final Node" Info-final-node
|
||
: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
|
||
:help "Search for regular expression in this Info file"]
|
||
["Search Next" Info-search-next
|
||
:help "Search for another occurrence of regular expression"]
|
||
["Go to Node..." Info-goto-node
|
||
:help "Go to a named node"]
|
||
["Back in history" Info-history-back :active Info-history
|
||
:help "Go back in history to the last node you were at"]
|
||
["Forward in history" Info-history-forward :active Info-history-forward
|
||
:help "Go forward in history"]
|
||
["History" Info-history :active Info-history-list
|
||
:help "Go to menu of visited nodes"]
|
||
["Table of Contents" Info-toc
|
||
:help "Go to table of contents"]
|
||
("Index"
|
||
["Lookup a String..." Info-index
|
||
:help "Look for a string in the index items"]
|
||
["Next Matching Item" Info-index-next :active Info-index-alternatives
|
||
:help "Look for another occurrence of previous item"]
|
||
["Lookup a string in all indices..." info-apropos
|
||
:help "Look for a string in the indices of all manuals"])
|
||
["Copy Node Name" Info-copy-current-node-name
|
||
:help "Copy the name of the current node into the kill ring"]
|
||
["Clone Info buffer" clone-buffer
|
||
:help "Create a twin copy of the current Info buffer."]
|
||
["Exit" Info-exit :help "Stop reading Info"]))
|
||
|
||
|
||
(defvar info-tool-bar-map
|
||
(if (display-graphic-p)
|
||
(let ((map (make-sparse-keymap)))
|
||
(tool-bar-local-item-from-menu 'Info-history-back "left-arrow" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-history-forward "right-arrow" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-prev "prev-node" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-next "next-node" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-up "up-node" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-top-node "home" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-goto-node "jump-to" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-index "index" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-search "search" map Info-mode-map)
|
||
(tool-bar-local-item-from-menu 'Info-exit "exit" map Info-mode-map)
|
||
map)))
|
||
|
||
(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 "" nil 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] nil :active)))
|
||
(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 (match-string 1))
|
||
(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] nil :active)))
|
||
(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))))
|
||
|
||
|
||
(defun Info-copy-current-node-name (&optional arg)
|
||
"Put the name of the current Info node into the kill ring.
|
||
The name of the Info file is prepended to the node name in parentheses.
|
||
With a zero prefix arg, put the name inside a function call to `info'."
|
||
(interactive "P")
|
||
(unless Info-current-node
|
||
(error "No current Info node"))
|
||
(let ((node (if (stringp Info-current-file)
|
||
(concat "(" (file-name-nondirectory Info-current-file) ")"
|
||
Info-current-node))))
|
||
(if (zerop (prefix-numeric-value arg))
|
||
(setq node (concat "(info \"" node "\")")))
|
||
(unless (stringp Info-current-file)
|
||
(setq node (format "(Info-find-node '%S '%S)"
|
||
Info-current-file Info-current-node)))
|
||
(kill-new node)
|
||
(message "%s" node)))
|
||
|
||
|
||
;; Info mode is suitable only for specially formatted data.
|
||
(put 'Info-mode 'mode-class 'special)
|
||
(put 'Info-mode 'no-clone-indirect t)
|
||
|
||
(defvar tool-bar-map)
|
||
|
||
;; Autoload cookie needed by desktop.el
|
||
;;;###autoload
|
||
(defun Info-mode ()
|
||
"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-mode-map>\
|
||
\\[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-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.
|
||
\\[Info-next-reference] Move cursor to next cross-reference or menu item.
|
||
\\[Info-prev-reference] Move cursor to previous cross-reference or menu item.
|
||
\\[Info-follow-reference] Follow a cross reference. Reads name of reference.
|
||
\\[Info-history-back] Move back in history to the last node you were at.
|
||
\\[Info-history-forward] Move forward in history to the node you returned from after using \\[Info-history-back].
|
||
\\[Info-history] Go to menu of visited nodes.
|
||
\\[Info-toc] Go to table of contents of the current Info file.
|
||
|
||
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 there 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-search] Search through this Info file for specified regexp,
|
||
and select the node in which the next occurrence is found.
|
||
\\[Info-search-case-sensitively] Search through this Info file for specified regexp case-sensitively.
|
||
\\[Info-search-next] Search for another occurrence of regexp
|
||
from a previous \\<Info-mode-map>\\[Info-search] command.
|
||
\\[Info-index] Search for a topic in this manual's Index and go to index entry.
|
||
\\[Info-index-next] (comma) Move to the next match from a previous \\<Info-mode-map>\\[Info-index] command.
|
||
\\[info-apropos] Look for a string in the indices of all manuals.
|
||
\\[Info-goto-node] Move to node specified by name.
|
||
You may include a filename as well, as (FILENAME)NODENAME.
|
||
1 .. 9 Pick first ... ninth item in node's menu.
|
||
Every third `*' is highlighted to help pick the right number.
|
||
\\[Info-copy-current-node-name] Put name of current Info node in the kill ring.
|
||
\\[clone-buffer] Select a new cloned Info buffer in another window.
|
||
\\[universal-argument] \\[info] Move to new Info file with completion.
|
||
\\[universal-argument] N \\[info] Select Info buffer with prefix number in the name *info*<N>."
|
||
(kill-all-local-variables)
|
||
(setq major-mode 'Info-mode)
|
||
(setq mode-name "Info")
|
||
(setq tab-width 8)
|
||
(use-local-map Info-mode-map)
|
||
(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-history-forward)
|
||
(make-local-variable 'Info-index-alternatives)
|
||
(setq header-line-format
|
||
(if Info-use-header-line
|
||
'(:eval (get-text-property (point-min) 'header-line))
|
||
nil)) ; so the header line isn't displayed
|
||
(set (make-local-variable 'tool-bar-map) info-tool-bar-map)
|
||
;; 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)
|
||
(make-local-variable 'desktop-save-buffer)
|
||
(make-local-variable 'widen-automatically)
|
||
(setq widen-automatically nil)
|
||
(setq desktop-save-buffer 'Info-desktop-buffer-misc-data)
|
||
(add-hook 'kill-buffer-hook 'Info-kill-buffer nil t)
|
||
(add-hook 'clone-buffer-hook 'Info-clone-buffer-hook nil t)
|
||
(add-hook 'change-major-mode-hook 'font-lock-defontify nil t)
|
||
(add-hook 'isearch-mode-hook 'Info-isearch-start nil t)
|
||
(set (make-local-variable 'isearch-search-fun-function)
|
||
'Info-isearch-search)
|
||
(set (make-local-variable 'isearch-wrap-function)
|
||
'Info-isearch-wrap)
|
||
(set (make-local-variable 'isearch-push-state-function)
|
||
'Info-isearch-push-state)
|
||
(set (make-local-variable 'search-whitespace-regexp)
|
||
Info-search-whitespace-regexp)
|
||
(Info-set-mode-line)
|
||
(run-mode-hooks 'Info-mode-hook))
|
||
|
||
;; 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)))
|
||
|
||
(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 (markerp m)
|
||
(setq Info-tag-table-marker
|
||
(if (and (marker-position m) (bufferp Info-tag-table-buffer))
|
||
(with-current-buffer Info-tag-table-buffer
|
||
(copy-marker (marker-position m)))
|
||
(make-marker))))))
|
||
|
||
(defvar Info-edit-map (let ((map (make-sparse-keymap)))
|
||
(set-keymap-parent map text-mode-map)
|
||
(define-key map "\C-c\C-c" 'Info-cease-edit)
|
||
map)
|
||
"Local keymap used within `e' command of Info.")
|
||
|
||
;; 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-mode-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" "eudc" "forms" "gnus" "info" ("Info" . "info") ("mh" . "mh-e")
|
||
"sc" "message" ("dired" . "dired-x") "viper" "vip" "idlwave"
|
||
("c" . "ccmode") ("c++" . "ccmode") ("objc" . "ccmode")
|
||
("java" . "ccmode") ("idl" . "ccmode") ("pike" . "ccmode")
|
||
("skeleton" . "autotype") ("auto-insert" . "autotype")
|
||
("copyright" . "autotype") ("executable" . "autotype")
|
||
("time-stamp" . "autotype") ("quickurl" . "autotype")
|
||
("tempo" . "autotype") ("hippie-expand" . "autotype")
|
||
("cvs" . "pcl-cvs") ("ada" . "ada-mode") "calc"
|
||
("calcAlg" . "calc") ("calcDigit" . "calc") ("calcVar" . "calc")
|
||
"ebrowse" "eshell" "cl" "reftex" "speedbar" "widget" "woman"
|
||
("mail-header" . "emacs-mime") ("mail-content" . "emacs-mime")
|
||
("mail-encode" . "emacs-mime") ("mail-decode" . "emacs-mime")
|
||
("rfc2045" . "emacs-mime")
|
||
("rfc2231" . "emacs-mime") ("rfc2047" . "emacs-mime")
|
||
("rfc2045" . "emacs-mime") ("rfc1843" . "emacs-mime")
|
||
("ietf-drums" . "emacs-mime") ("quoted-printable" . "emacs-mime")
|
||
("binhex" . "emacs-mime") ("uudecode" . "emacs-mime")
|
||
("mailcap" . "emacs-mime") ("mm" . "emacs-mime")
|
||
("mml" . "emacs-mime"))
|
||
"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.
|
||
\(FILENAME NODENAME BUFFERPOS\), where BUFFERPOS is the line number
|
||
in the first element of the returned list (which is treated specially in
|
||
`Info-goto-emacs-command-node'), and 0 for the rest elements of a list."
|
||
(let ((where '()) line-number
|
||
(cmd-desc (concat "^\\* +" (regexp-quote (symbol-name command))
|
||
"\\( <[0-9]+>\\)?:\\s *\\(.*\\)\\."
|
||
"\\(?:[ \t\n]+(line +\\([0-9]+\\))\\)?"))
|
||
(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))
|
||
(case-fold-search nil)
|
||
(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))))))
|
||
(Info-find-node info-file "Top")
|
||
;; Bind Info-history to nil, to prevent the index nodes from
|
||
;; getting into the node history.
|
||
(let ((Info-history nil)
|
||
(Info-history-list nil)
|
||
node (nodes (Info-index-nodes)))
|
||
(Info-goto-node (car nodes))
|
||
(while
|
||
(progn
|
||
(goto-char (point-min))
|
||
(while (re-search-forward cmd-desc nil t)
|
||
(setq where
|
||
(cons (list Info-current-file
|
||
(match-string-no-properties 2)
|
||
0)
|
||
where))
|
||
(setq line-number (and (match-beginning 3)
|
||
(string-to-number (match-string 3)))))
|
||
(and (setq nodes (cdr nodes) node (car nodes))))
|
||
(Info-goto-node node)))
|
||
(if (and line-number where)
|
||
(cons (list (nth 0 (car where)) (nth 1 (car where)) line-number)
|
||
(cdr where))
|
||
where)))
|
||
|
||
;;;###autoload (put 'Info-goto-emacs-command-node 'info-file "emacs")
|
||
;;;###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 indices
|
||
or in another manual found via COMMAND's `info-file' property or
|
||
the variable `Info-file-list-for-emacs'.
|
||
COMMAND must be a symbol or string."
|
||
(interactive "CFind documentation for command: ")
|
||
;; If command is given as a string, convert it to a symbol.
|
||
(if (stringp command)
|
||
(setq command (intern 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))
|
||
(or (eq major-mode 'Info-mode) (pop-to-buffer "*info*"))
|
||
;; Bind Info-history to nil, to prevent the last Index node
|
||
;; visited by Info-find-emacs-command-nodes from being
|
||
;; pushed onto the history.
|
||
(let ((Info-history nil) (Info-history-list nil)
|
||
(line-number (nth 2 (car where))))
|
||
(Info-find-node (nth 0 (car where)) (nth 1 (car where)))
|
||
(if (and (integerp line-number) (> line-number 0))
|
||
(forward-line (1- line-number))))
|
||
(if (> num-matches 1)
|
||
(progn
|
||
;; (car where) will be pushed onto Info-history
|
||
;; when/if they go to another node. 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-history-back]")
|
||
(if (> num-matches 2) "them" "it")))))
|
||
(error "Couldn't find documentation for %s" command))))
|
||
|
||
;;;###autoload (put 'Info-goto-emacs-key-command-node 'info-file "emacs")
|
||
;;;###autoload
|
||
(defun Info-goto-emacs-key-command-node (key)
|
||
"Go to the node in the Emacs manual which describes the command bound to KEY.
|
||
KEY is 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 indices
|
||
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)))))
|
||
|
||
(defvar Info-next-link-keymap
|
||
(let ((keymap (make-sparse-keymap)))
|
||
(define-key keymap [header-line mouse-1] 'Info-next)
|
||
(define-key keymap [header-line mouse-2] 'Info-next)
|
||
(define-key keymap [header-line down-mouse-1] 'ignore)
|
||
(define-key keymap [mouse-2] 'Info-next)
|
||
(define-key keymap [follow-link] 'mouse-face)
|
||
keymap)
|
||
"Keymap to put on the Next link in the text or the header line.")
|
||
|
||
(defvar Info-prev-link-keymap
|
||
(let ((keymap (make-sparse-keymap)))
|
||
(define-key keymap [header-line mouse-1] 'Info-prev)
|
||
(define-key keymap [header-line mouse-2] 'Info-prev)
|
||
(define-key keymap [header-line down-mouse-1] 'ignore)
|
||
(define-key keymap [mouse-2] 'Info-prev)
|
||
(define-key keymap [follow-link] 'mouse-face)
|
||
keymap)
|
||
"Keymap to put on the Prev link in the text or the header line.")
|
||
|
||
(defvar Info-up-link-keymap
|
||
(let ((keymap (make-sparse-keymap)))
|
||
(define-key keymap [header-line mouse-1] 'Info-up)
|
||
(define-key keymap [header-line mouse-2] 'Info-up)
|
||
(define-key keymap [header-line down-mouse-1] 'ignore)
|
||
(define-key keymap [mouse-2] 'Info-up)
|
||
(define-key keymap [follow-link] 'mouse-face)
|
||
keymap)
|
||
"Keymap to put on the Up link in the text or the header line.")
|
||
|
||
(defun Info-fontify-node ()
|
||
"Fontify the node."
|
||
(save-excursion
|
||
(let* ((inhibit-read-only t)
|
||
(case-fold-search t)
|
||
paragraph-markers
|
||
(not-fontified-p ; the node hasn't already been fontified
|
||
(not (let ((where (next-property-change (point-min))))
|
||
(and where (not (= where (point-max)))))))
|
||
(fontify-visited-p ; visited nodes need to be re-fontified
|
||
(and Info-fontify-visited-nodes
|
||
;; Don't take time to refontify visited nodes in huge nodes
|
||
Info-fontify-maximum-menu-size
|
||
(< (- (point-max) (point-min)) Info-fontify-maximum-menu-size)))
|
||
rbeg rend)
|
||
|
||
;; Fontify header line
|
||
(goto-char (point-min))
|
||
(when (and not-fontified-p (looking-at "^\\(File: [^,: \t]+,?[ \t]+\\)?"))
|
||
(goto-char (match-end 0))
|
||
(while (looking-at "[ \t]*\\([^:, \t\n]+\\):[ \t]+\\([^:,\t\n]+\\),?")
|
||
(goto-char (match-end 0))
|
||
(let* ((nbeg (match-beginning 2))
|
||
(nend (match-end 2))
|
||
(tbeg (match-beginning 1))
|
||
(tag (match-string 1)))
|
||
(if (string-equal (downcase tag) "node")
|
||
(put-text-property nbeg nend 'font-lock-face 'info-header-node)
|
||
(put-text-property nbeg nend 'font-lock-face 'info-header-xref)
|
||
(put-text-property tbeg nend 'mouse-face 'highlight)
|
||
(put-text-property tbeg nend
|
||
'help-echo
|
||
(concat "mouse-2: Go to node "
|
||
(buffer-substring nbeg nend)))
|
||
;; Always set up the text property keymap.
|
||
;; It will either be used in the buffer
|
||
;; or copied in the header line.
|
||
(put-text-property
|
||
tbeg nend 'keymap
|
||
(cond
|
||
((string-equal (downcase tag) "prev") Info-prev-link-keymap)
|
||
((string-equal (downcase tag) "next") Info-next-link-keymap)
|
||
((string-equal (downcase tag) "up" ) Info-up-link-keymap))))))
|
||
(when Info-use-header-line
|
||
(goto-char (point-min))
|
||
(let* ((header-end (line-end-position))
|
||
(header
|
||
;; If we find neither Next: nor Prev: link, show the entire
|
||
;; node header. Otherwise, don't show the File: and Node:
|
||
;; parts, to avoid wasting precious space on information that
|
||
;; is available in the mode line.
|
||
(if (re-search-forward
|
||
"\\(next\\|up\\|prev[ious]*\\): "
|
||
header-end t)
|
||
(progn
|
||
(goto-char (match-beginning 1))
|
||
(buffer-substring (point) header-end))
|
||
(if (re-search-forward "node:[ \t]*[^ \t]+[ \t]*"
|
||
header-end t)
|
||
(concat "No next, prev or up links -- "
|
||
(buffer-substring (point) header-end))
|
||
(buffer-substring (point) header-end)))))
|
||
(put-text-property (point-min) (1+ (point-min))
|
||
'header-line
|
||
(replace-regexp-in-string
|
||
"%"
|
||
;; Preserve text properties on duplicated `%'.
|
||
(lambda (s) (concat s s)) header))
|
||
;; Hide the part of the first line
|
||
;; that is in the header, if it is just part.
|
||
(unless (bobp)
|
||
;; Hide the punctuation at the end, too.
|
||
(skip-chars-backward " \t,")
|
||
(put-text-property (point) header-end 'invisible t)))))
|
||
|
||
;; Fontify titles
|
||
(goto-char (point-min))
|
||
(when (and font-lock-mode not-fontified-p)
|
||
(while (and (re-search-forward "\n\\([^ \t\n].+\\)\n\\(\\*\\*+\\|==+\\|--+\\|\\.\\.+\\)$"
|
||
nil t)
|
||
;; Only consider it as an underlined title if the ASCII
|
||
;; underline has the same size as the text. A typical
|
||
;; counter example is when a continuation "..." is alone
|
||
;; on a line.
|
||
(= (string-width (match-string 1))
|
||
(string-width (match-string 2))))
|
||
(let* ((c (preceding-char))
|
||
(face
|
||
(cond ((= c ?*) 'info-title-1)
|
||
((= c ?=) 'info-title-2)
|
||
((= c ?-) 'info-title-3)
|
||
(t 'info-title-4))))
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'font-lock-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.
|
||
(when (memq (framep (selected-frame)) '(x pc w32 mac))
|
||
(add-text-properties (1- (match-beginning 2)) (match-end 2)
|
||
'(invisible t front-sticky nil rear-nonsticky t)))))
|
||
|
||
;; Fontify cross references
|
||
(goto-char (point-min))
|
||
(when (or not-fontified-p fontify-visited-p)
|
||
(while (re-search-forward "\\(\\*Note[ \n\t]+\\)\\([^:]*\\)\\(:[ \t]*\\([^.,:(]*\\)\\(\\(([^)]*)\\)[^.,:]*\\)?[,:]?\n?\\)" nil t)
|
||
(let ((start (match-beginning 0))
|
||
(next (point))
|
||
other-tag)
|
||
(when not-fontified-p
|
||
(when Info-hide-note-references
|
||
(when (not (eq Info-hide-note-references 'hide))
|
||
;; *Note is often used where *note should have been
|
||
(goto-char start)
|
||
(skip-syntax-backward " ")
|
||
(when (memq (char-before) '(?\( ?\[ ?\{))
|
||
;; Check whether the paren is preceded by
|
||
;; an end of sentence
|
||
(skip-syntax-backward " ("))
|
||
(setq other-tag
|
||
(cond ((save-match-data (looking-back "\\<see"))
|
||
"")
|
||
((save-match-data (looking-back "\\<in"))
|
||
"")
|
||
((memq (char-before) '(nil ?\. ?! ??))
|
||
"See ")
|
||
((save-match-data
|
||
(save-excursion
|
||
(search-forward "\n\n" start t)))
|
||
"See ")
|
||
(t "see "))))
|
||
(goto-char next)
|
||
(add-text-properties
|
||
(match-beginning 1)
|
||
(or (save-match-data
|
||
;; Don't hide \n after *Note
|
||
(let ((start1 (match-beginning 1)))
|
||
(if (string-match "\n" (match-string 1))
|
||
(+ start1 (match-beginning 0)))))
|
||
(match-end 1))
|
||
(if other-tag
|
||
`(display ,other-tag front-sticky nil rear-nonsticky t)
|
||
'(invisible t front-sticky nil rear-nonsticky t))))
|
||
(add-text-properties
|
||
(match-beginning 2) (match-end 2)
|
||
(list
|
||
'help-echo (if (or (match-end 5)
|
||
(not (equal (match-string 4) "")))
|
||
(concat "mouse-2: go to " (or (match-string 5)
|
||
(match-string 4)))
|
||
"mouse-2: go to this node")
|
||
'mouse-face 'highlight)))
|
||
(when (or not-fontified-p fontify-visited-p)
|
||
(setq rbeg (match-beginning 2)
|
||
rend (match-end 2))
|
||
(put-text-property
|
||
rbeg rend
|
||
'font-lock-face
|
||
;; Display visited nodes in a different face
|
||
(if (and Info-fontify-visited-nodes
|
||
(save-match-data
|
||
(let* ((node (replace-regexp-in-string
|
||
"^[ \t]+" ""
|
||
(replace-regexp-in-string
|
||
"[ \t\n]+" " "
|
||
(or (match-string-no-properties 5)
|
||
(and (not (equal (match-string 4) ""))
|
||
(match-string-no-properties 4))
|
||
(match-string-no-properties 2)))))
|
||
(external-link-p
|
||
(string-match "(\\([^)]+\\))\\([^)]*\\)" node))
|
||
(file (if external-link-p
|
||
(file-name-nondirectory
|
||
(match-string-no-properties 1 node))
|
||
Info-current-file))
|
||
(hl Info-history-list)
|
||
res)
|
||
(if external-link-p
|
||
(setq node (if (equal (match-string 2 node) "")
|
||
"Top"
|
||
(match-string-no-properties 2 node))))
|
||
(while hl
|
||
(if (and (string-equal node (nth 1 (car hl)))
|
||
(equal file
|
||
(if (and external-link-p
|
||
(stringp (caar hl)))
|
||
(file-name-nondirectory
|
||
(caar hl))
|
||
(caar hl))))
|
||
(setq res (car hl) hl nil)
|
||
(setq hl (cdr hl))))
|
||
res))) 'info-xref-visited 'info-xref))
|
||
;; For multiline ref, unfontify newline and surrounding whitespace
|
||
(save-excursion
|
||
(goto-char rbeg)
|
||
(save-match-data
|
||
(while (re-search-forward "\\s-*\n\\s-*" rend t nil)
|
||
(remove-text-properties (match-beginning 0)
|
||
(match-end 0)
|
||
'(font-lock-face t))))))
|
||
(when not-fontified-p
|
||
(when (memq Info-hide-note-references '(t hide))
|
||
(add-text-properties (match-beginning 3) (match-end 3)
|
||
'(invisible t front-sticky nil rear-nonsticky t))
|
||
;; Unhide the file name of the external reference in parens
|
||
(if (and (match-string 6) (not (eq Info-hide-note-references 'hide)))
|
||
(remove-text-properties (match-beginning 6) (match-end 6)
|
||
'(invisible t front-sticky nil rear-nonsticky t)))
|
||
;; Unhide newline because hidden newlines cause too long lines
|
||
(save-match-data
|
||
(let ((beg3 (match-beginning 3))
|
||
(end3 (match-end 3)))
|
||
(if (and (string-match "\n[ \t]*" (match-string 3))
|
||
(not (save-match-data
|
||
(save-excursion
|
||
(goto-char (1+ end3))
|
||
(looking-at "[.)]*$")))))
|
||
(remove-text-properties (+ beg3 (match-beginning 0))
|
||
(+ beg3 (match-end 0))
|
||
'(invisible t front-sticky nil rear-nonsticky t))))))
|
||
(when (and Info-refill-paragraphs Info-hide-note-references)
|
||
(push (set-marker (make-marker) start)
|
||
paragraph-markers))))))
|
||
|
||
;; Refill paragraphs (experimental feature)
|
||
(when (and not-fontified-p
|
||
Info-refill-paragraphs
|
||
paragraph-markers)
|
||
(let ((fill-nobreak-invisible t)
|
||
(fill-individual-varying-indent nil)
|
||
(paragraph-start "\f\\|[ \t]*[-*]\\|[ \t]*$")
|
||
(paragraph-separate ".*\\.[ \t]*\n[ \t]\\|[ \t]*[-*]\\|[ \t\f]*$")
|
||
(adaptive-fill-mode nil))
|
||
(goto-char (point-max))
|
||
(dolist (m paragraph-markers)
|
||
(when (< m (point))
|
||
(goto-char m)
|
||
(beginning-of-line)
|
||
(let ((beg (point)))
|
||
(when (zerop (forward-paragraph))
|
||
(fill-individual-paragraphs beg (point) nil nil)
|
||
(goto-char beg))))
|
||
(set-marker m nil))))
|
||
|
||
;; Fontify menu items
|
||
(goto-char (point-min))
|
||
(when (and (or not-fontified-p fontify-visited-p)
|
||
(search-forward "\n* Menu:" nil t)
|
||
;; Don't take time to annotate huge menus
|
||
Info-fontify-maximum-menu-size
|
||
(< (- (point-max) (point)) Info-fontify-maximum-menu-size))
|
||
(let ((n 0)
|
||
cont)
|
||
(while (re-search-forward
|
||
(concat "^\\* Menu:\\|\\(?:^\\* +\\(" Info-menu-entry-name-re "\\)\\(:"
|
||
Info-node-spec-re "\\([ \t]*\\)\\)\\)")
|
||
nil t)
|
||
(when (match-beginning 1)
|
||
(when not-fontified-p
|
||
(setq n (1+ n))
|
||
(if (and (<= n 9) (zerop (% n 3))) ; visual aids to help with 1-9 keys
|
||
(put-text-property (match-beginning 0)
|
||
(1+ (match-beginning 0))
|
||
'font-lock-face 'info-menu-star)))
|
||
(when not-fontified-p
|
||
(add-text-properties
|
||
(match-beginning 1) (match-end 1)
|
||
(list
|
||
'help-echo (if (and (match-end 3)
|
||
(not (equal (match-string 3) "")))
|
||
(concat "mouse-2: go to " (match-string 3))
|
||
"mouse-2: go to this node")
|
||
'mouse-face 'highlight)))
|
||
(when (or not-fontified-p fontify-visited-p)
|
||
(put-text-property
|
||
(match-beginning 1) (match-end 1)
|
||
'font-lock-face
|
||
;; Display visited menu items in a different face
|
||
(if (and Info-fontify-visited-nodes
|
||
(save-match-data
|
||
(let* ((node (if (equal (match-string 3) "")
|
||
(match-string-no-properties 1)
|
||
(match-string-no-properties 3)))
|
||
(external-link-p
|
||
(string-match "(\\([^)]+\\))\\([^)]*\\)" node))
|
||
(file (if external-link-p
|
||
(file-name-nondirectory
|
||
(match-string-no-properties 1 node))
|
||
Info-current-file))
|
||
(hl Info-history-list)
|
||
res)
|
||
(if external-link-p
|
||
(setq node (if (equal (match-string 2 node) "")
|
||
"Top"
|
||
(match-string-no-properties 2 node))))
|
||
(while hl
|
||
(if (and (string-equal node (nth 1 (car hl)))
|
||
(equal file
|
||
(if (and external-link-p
|
||
(stringp (caar hl)))
|
||
(file-name-nondirectory
|
||
(caar hl))
|
||
(caar hl))))
|
||
(setq res (car hl) hl nil)
|
||
(setq hl (cdr hl))))
|
||
res))) 'info-xref-visited 'info-xref)))
|
||
(when (and not-fontified-p
|
||
(memq Info-hide-note-references '(t hide))
|
||
(not (Info-index-node)))
|
||
(put-text-property (match-beginning 2) (1- (match-end 6))
|
||
'invisible t)
|
||
;; Unhide the file name in parens
|
||
(if (and (match-end 4) (not (eq (char-after (match-end 4)) ?.)))
|
||
(remove-text-properties (match-beginning 4) (match-end 4)
|
||
'(invisible t)))
|
||
;; We need a stretchable space like :align-to but with
|
||
;; a minimum value.
|
||
(put-text-property (1- (match-end 6)) (match-end 6) 'display
|
||
(if (>= 22 (- (match-end 1)
|
||
(match-beginning 0)))
|
||
'(space :align-to 24)
|
||
'(space :width 2)))
|
||
(setq cont (looking-at "."))
|
||
(while (and (= (forward-line 1) 0)
|
||
(looking-at "\\([ \t]+\\)[^*\n]"))
|
||
(put-text-property (match-beginning 1) (1- (match-end 1))
|
||
'invisible t)
|
||
(put-text-property (1- (match-end 1)) (match-end 1)
|
||
'display
|
||
(if cont
|
||
'(space :align-to 26)
|
||
'(space :align-to 24)))
|
||
(setq cont t)))))))
|
||
|
||
;; Fontify menu headers
|
||
;; Add the face `info-menu-header' to any header before a menu entry
|
||
(goto-char (point-min))
|
||
(when (and not-fontified-p (re-search-forward "^\\* Menu:" nil t))
|
||
(put-text-property (match-beginning 0) (match-end 0)
|
||
'font-lock-face 'info-menu-header)
|
||
(while (re-search-forward "\n\n\\([^*\n ].*\\)\n\n?[*]" nil t)
|
||
(put-text-property (match-beginning 1) (match-end 1)
|
||
'font-lock-face 'info-menu-header)))
|
||
|
||
;; Hide index line numbers
|
||
(goto-char (point-min))
|
||
(when (and not-fontified-p (Info-index-node))
|
||
(while (re-search-forward "[ \t\n]*(line +[0-9]+)" nil t)
|
||
(put-text-property (match-beginning 0) (match-end 0)
|
||
'invisible t)))
|
||
|
||
;; Fontify http and ftp references
|
||
(goto-char (point-min))
|
||
(when not-fontified-p
|
||
(while (re-search-forward "\\(https?\\|ftp\\)://[^ \t\n\"`({<>})']+"
|
||
nil t)
|
||
(add-text-properties (match-beginning 0) (match-end 0)
|
||
'(font-lock-face info-xref
|
||
mouse-face highlight
|
||
help-echo "mouse-2: go to this URL"))))
|
||
|
||
(set-buffer-modified-p nil))))
|
||
|
||
;;; 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))
|
||
(speedbar-select-attached-frame)
|
||
(save-window-excursion
|
||
(setq completions
|
||
(Info-speedbar-fetch-file-nodes (or node '"(dir)top"))))
|
||
(select-frame (speedbar-current-frame))
|
||
(if completions
|
||
(speedbar-with-writable
|
||
(dolist (completion completions)
|
||
(speedbar-make-tag-line 'bracket ?+ 'Info-speedbar-expand-node
|
||
(cdr completion)
|
||
(car completion)
|
||
'Info-speedbar-goto-node
|
||
(cdr completion)
|
||
'info-xref depth))
|
||
t)
|
||
nil))))
|
||
|
||
(defun Info-speedbar-goto-node (text node indent)
|
||
"When user clicks on TEXT, go to an info NODE.
|
||
The INDENT level is ignored."
|
||
(speedbar-select-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)))
|
||
(speedbar-select-attached-frame)
|
||
(switch-to-buffer buff)))
|
||
(if (not (string-match "^(\\([^)]+\\))\\([^.]+\\)$" node))
|
||
(error "Invalid node %s" node)
|
||
(Info-find-node (match-string 1 node) (match-string 2 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."
|
||
(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
|
||
(if (not (string-match "^(\\([^)]+\\))\\([^.]+\\)$" nodespec))
|
||
(error "Invalid node specification %s" nodespec)
|
||
(Info-find-node (match-string 1 nodespec) (match-string 2 nodespec)))
|
||
;; Scan the created buffer
|
||
(goto-char (point-min))
|
||
(let ((completions nil)
|
||
(case-fold-search t)
|
||
(thisfile (progn (string-match "^(\\([^)]+\\))" nodespec)
|
||
(match-string 1 nodespec))))
|
||
;; Always skip the first one...
|
||
(re-search-forward "\n\\* \\([^:\t\n]*\\):" nil t)
|
||
(while (re-search-forward "\n\\* \\([^:\t\n]*\\):" nil t)
|
||
(let ((name (match-string 1)))
|
||
(push (cons name
|
||
(if (looking-at " *\\(([^)]+)[^.\n]+\\)\\.")
|
||
(match-string 1)
|
||
(if (looking-at " *\\(([^)]+)\\)\\.")
|
||
(concat (match-string 1) "Top")
|
||
(concat "(" thisfile ")"
|
||
(if (looking-at " \\([^.]+\\).")
|
||
(match-string 1)
|
||
name)))))
|
||
completions)))
|
||
(nreverse completions))))
|
||
|
||
;;; Info mode node listing
|
||
;; This is called by `speedbar-add-localized-speedbar-support'
|
||
(defun Info-speedbar-buttons (buffer)
|
||
"Create a speedbar display to help navigation in an Info file.
|
||
BUFFER is the buffer speedbar is requesting buttons for."
|
||
(if (save-excursion (goto-char (point-min))
|
||
(let ((case-fold-search t))
|
||
(not (looking-at "Info Nodes:"))))
|
||
(erase-buffer))
|
||
(Info-speedbar-hierarchy-buttons nil 0))
|
||
|
||
(dolist (mess '("^First node in file$"
|
||
"^No `.*' in index$"
|
||
"^No cross-reference named"
|
||
"^No cross.references in this node$"
|
||
"^No current Info node$"
|
||
"^No menu in this node$"
|
||
"^No more items in menu$"
|
||
"^No more nodes$"
|
||
"^No pointer \\(?:forward\\|backward\\) from this node$"
|
||
"^No previous `i' command$"
|
||
"^No previous items in menu$"
|
||
"^No previous nodes$"
|
||
"^No such item in menu$"
|
||
"^No such node or anchor"
|
||
"^Node has no"
|
||
"^Point neither on reference nor in menu item description$"
|
||
"^This is the \\(?:first\\|last\\) Info node you looked at$"
|
||
search-failed))
|
||
(add-to-list 'debug-ignored-errors mess))
|
||
|
||
;;;; Desktop support
|
||
|
||
(defun Info-desktop-buffer-misc-data (desktop-dirname)
|
||
"Auxiliary information to be saved in desktop file."
|
||
(unless (member Info-current-file '(apropos history toc nil))
|
||
(list Info-current-file Info-current-node)))
|
||
|
||
(defun Info-restore-desktop-buffer (desktop-buffer-file-name
|
||
desktop-buffer-name
|
||
desktop-buffer-misc)
|
||
"Restore an Info buffer specified in a desktop file."
|
||
(let ((first (nth 0 desktop-buffer-misc))
|
||
(second (nth 1 desktop-buffer-misc)))
|
||
(when (and first second)
|
||
(when desktop-buffer-name
|
||
(set-buffer (get-buffer-create desktop-buffer-name))
|
||
(Info-mode))
|
||
(Info-find-node first second)
|
||
(current-buffer))))
|
||
|
||
(add-to-list 'desktop-buffer-mode-handlers
|
||
'(Info-mode . Info-restore-desktop-buffer))
|
||
|
||
(provide 'info)
|
||
|
||
;; arch-tag: f2480fe2-2139-40c1-a49b-6314991164ac
|
||
;;; info.el ends here
|