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- ;; Info package for Emacs -- could use a "create node" feature.
- ;; Copyright (C) 1985-1993 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- (provide 'info)
-
- (defvar Info-history nil
- "List of info nodes user has visited.
- Each element of list is a list (FILENAME NODENAME BUFFERPOS).")
-
- (defvar Info-enable-edit nil
- "Non-nil means the \\[Info-edit] command in Info can edit the current node.")
-
- (defvar Info-enable-active-nodes t
- "Non-nil allows Info to execute Lisp code associated with nodes.
- The Lisp code is executed when the node is selected.")
-
- (defvar Info-directory-list nil
- "List of directories to search for Info documentation files.")
-
- (defvar Info-current-file nil
- "Info file that Info is now looking at, or nil.")
-
- (defvar Info-current-subfile nil
- "Info subfile that is actually in the *info* buffer now,
- or nil if current info file is not split into subfiles.")
-
- (defvar Info-current-node nil
- "Name of node that Info is now looking at, or nil.")
-
- (defvar Info-tag-table-marker (make-marker)
- "Marker pointing at beginning of current Info file's tag table.
- Marker points nowhere if file has no tag table.")
-
- (defun info ()
- "Enter Info, the documentation browser."
- (interactive)
- (if (get-buffer "*info*")
- (switch-to-buffer "*info*")
- (Info-directory)))
-
- ;; 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.
- (defun Info-find-node (filename nodename &optional no-going-back)
- ;; Convert filename to lower case if not found as specified.
- ;; Expand it.
- (if filename
- (let (temp found)
- (setq filename (substitute-in-file-name filename))
- (if (not (string-match "^\\./" filename))
- (let ((dirs Info-directory-list))
- ;; Search the directory list for file FILENAME.
- (while (and dirs (not found))
- (setq found
- (expand-file-name filename (car dirs)))
- (if (not (file-exists-p found))
- (setq found nil))
- ;; Also try (downcase FILENAME) in each directory.
- (or found
- (progn
- (setq found
- (expand-file-name (downcase filename)
- (car dirs)))
- (if (not (file-exists-p found))
- (setq found nil))))
- (setq dirs (cdr dirs))))
- ;; FILENAME starts with `./'; just look in current directory.
- (if (file-exists-p (expand-file-name filename))
- (setq found (file-exists-p (expand-file-name filename)))))
- (if found
- (setq filename found)
- (error "Info file %s does not exist" filename))))
- ;; Record the node we are leaving.
- (if (and Info-current-file (not no-going-back))
- (setq Info-history
- (cons (list Info-current-file Info-current-node (point))
- Info-history)))
- ;; Go into info buffer.
- (switch-to-buffer "*info*")
- (or (eq major-mode 'Info-mode)
- (Info-mode))
- (widen)
- (setq Info-current-node nil)
- (unwind-protect
- (progn
- ;; 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
- buffer-file-name nil)
- (erase-buffer)
- (insert-file-contents filename t)
- (set-buffer-modified-p nil)
- (setq default-directory (file-name-directory filename))
- ;; See whether file has a tag table. Record the location if yes.
- (set-marker Info-tag-table-marker nil)
- (goto-char (point-max))
- (forward-line -8)
- (or (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.
- (save-excursion
- (let ((buf (current-buffer)))
- (set-buffer (get-buffer-create " *info tag table*"))
- (setq case-fold-search t)
- (erase-buffer)
- (insert-buffer-substring buf)
- (set-marker Info-tag-table-marker
- (match-end 0))))
- (set-marker Info-tag-table-marker pos))))
- (setq Info-current-file
- (file-name-sans-versions buffer-file-name))))
- (if (equal nodename "*")
- (progn (setq Info-current-node nodename)
- (Info-set-mode-line))
- ;; Search file for a suitable node.
- ;; First get advice from tag table if file has one.
- ;; Also, if this is an indirect info file,
- ;; read the proper subfile into this buffer.
- (let ((guesspos (point-min)))
- (if (marker-position Info-tag-table-marker)
- (save-excursion
- (set-buffer (marker-buffer Info-tag-table-marker))
- (goto-char Info-tag-table-marker)
- (if (search-forward (concat "Node: " nodename "\177") nil t)
- (progn
- (setq guesspos (read (current-buffer)))
- ;; If this is an indirect file,
- ;; determine which file really holds this node
- ;; and read it in.
- (if (not (eq (current-buffer) (get-buffer "*info*")))
- (setq guesspos
- (Info-read-subfile guesspos))))
- (error "No such node: \"%s\"" nodename))))
- (goto-char (max (point-min) (- guesspos 1000))))
- ;; Now search from our advised position (or from beg of buffer)
- ;; to find the actual node.
- (let ((regexp (concat "Node: *" (regexp-quote nodename) " *[,\t\n]")))
- (catch 'foo
- (while (search-forward "\n\^_" nil t)
- (forward-line 1)
- (let ((beg (point)))
- (forward-line 1)
- (if (re-search-backward regexp beg t)
- (throw 'foo t))))
- (error "No such node: %s" nodename)))
- (Info-select-node)))
- ;; If we did not finish finding the specified node,
- ;; go back to the previous one.
- (or Info-current-node no-going-back
- (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)))))
- (goto-char (point-min)))
-
- (defun Info-read-subfile (nodepos)
- (set-buffer (marker-buffer Info-tag-table-marker))
- (goto-char (point-min))
- (search-forward "\n\^_")
- (let (lastfilepos
- lastfilename)
- (forward-line 2)
- (catch 'foo
- (while (not (looking-at "\^_"))
- (if (not (eolp))
- (let ((beg (point))
- thisfilepos thisfilename)
- (search-forward ": ")
- (setq thisfilename (buffer-substring beg (- (point) 2)))
- (setq thisfilepos (read (current-buffer)))
- ;; read in version 19 stops at the end of number.
- ;; Advance to the next line.
- (forward-line 1)
- (if (> thisfilepos nodepos)
- (throw 'foo t))
- (setq lastfilename thisfilename)
- (setq lastfilepos thisfilepos)))))
- (set-buffer (get-buffer "*info*"))
- (or (equal Info-current-subfile lastfilename)
- (let ((buffer-read-only nil))
- (setq buffer-file-name nil)
- (widen)
- (erase-buffer)
- (insert-file-contents lastfilename)
- (set-buffer-modified-p nil)
- (setq Info-current-subfile lastfilename)))
- (goto-char (point-min))
- (search-forward "\n\^_")
- (+ (- nodepos lastfilepos) (point))))
-
- ;; Select the info node that point is in.
- (defun Info-select-node ()
- (save-excursion
- ;; Find beginning of node.
- (search-backward "\n\^_")
- (forward-line 2)
- ;; Get nodename spelled as it is in the node.
- (re-search-forward "Node:[ \t]*")
- (setq Info-current-node
- (buffer-substring (point)
- (progn
- (skip-chars-forward "^,\t\n")
- (point))))
- (Info-set-mode-line)
- ;; Find the end of it, and narrow.
- (beginning-of-line)
- (let (active-expression)
- (narrow-to-region (point)
- (if (re-search-forward "\n[\^_\f]" nil t)
- (prog1
- (1- (point))
- (if (looking-at "[\n\^_\f]*execute: ")
- (progn
- (goto-char (match-end 0))
- (setq active-expression
- (read (current-buffer))))))
- (point-max)))
- (if Info-enable-active-nodes (eval active-expression))
- (Info-fontify-node)
- )))
-
- (defun Info-set-mode-line ()
- (setq mode-line-buffer-identification
- (concat
- "Info: ("
- (if Info-current-file
- (file-name-nondirectory Info-current-file)
- "")
- ")"
- (or Info-current-node ""))))
-
- ;; Go to an info node specified with a filename-and-nodename string
- ;; of the sort that is found in pointers in nodes.
-
- (defun Info-goto-node (nodename)
- "Go to info node named NAME. Give just NODENAME or (FILENAME)NODENAME."
- (interactive "sGoto node: ")
- (let (filename)
- (string-match "\\s *\\((\\s *\\([^\t)]*\\)\\s *)\\s *\\|\\)\\(.*\\)"
- nodename)
- (setq filename (if (= (match-beginning 1) (match-end 1))
- ""
- (substring nodename (match-beginning 2) (match-end 2)))
- nodename (substring nodename (match-beginning 3) (match-end 3)))
- (let ((trim (string-match "\\s *\\'" filename)))
- (if trim (setq filename (substring filename 0 trim))))
- (let ((trim (string-match "\\s *\\'" nodename)))
- (if trim (setq nodename (substring nodename 0 trim))))
- (Info-find-node (if (equal filename "") nil filename)
- (if (equal nodename "") "Top" nodename))))
-
- (defvar Info-last-search nil
- "Default regexp for Info S command to search for.")
-
- (defun Info-search (regexp)
- "Search for REGEXP, starting from point, and select node it's found in."
- (interactive "sSearch (regexp): ")
- (if (equal regexp "")
- (setq regexp Info-last-search)
- (setq Info-last-search regexp))
- (let ((found ()) current
- (onode Info-current-node)
- (ofile Info-current-file)
- (opoint (point))
- (osubfile Info-current-subfile))
- (save-excursion
- (save-restriction
- (widen)
- (if (null Info-current-subfile)
- (progn (re-search-forward regexp) (setq found (point)))
- (condition-case err
- (progn (re-search-forward regexp) (setq found (point)))
- (search-failed nil)))))
- (if (not found) ;can only happen in subfile case -- else would have erred
- (unwind-protect
- (let ((list ()))
- (set-buffer (marker-buffer Info-tag-table-marker))
- (goto-char (point-min))
- (search-forward "\n\^_\nIndirect:")
- (save-restriction
- (narrow-to-region (point)
- (progn (search-forward "\n\^_")
- (1- (point))))
- (goto-char (point-min))
- (search-forward (concat "\n" osubfile ": "))
- (beginning-of-line)
- (while (not (eobp))
- (re-search-forward "\\(^.*\\): [0-9]+$")
- (goto-char (+ (match-end 1) 2))
- (setq list (cons (cons (read (current-buffer))
- (buffer-substring (match-beginning 1)
- (match-end 1)))
- list))
- (goto-char (1+ (match-end 0))))
- (setq list (nreverse list)
- current (car (car list))
- list (cdr list)))
- (while list
- (message "Searching subfile %s..." (cdr (car list)))
- (Info-read-subfile (car (car list)))
- (setq list (cdr list))
- (goto-char (point-min))
- (if (re-search-forward regexp nil t)
- (setq found (point) list ())))
- (if found
- (message "")
- (signal 'search-failed (list regexp))))
- (if (not found)
- (progn (Info-read-subfile opoint)
- (goto-char opoint)
- (Info-select-node)))))
- (widen)
- (goto-char found)
- (Info-select-node)
- (or (and (equal onode Info-current-node)
- (equal ofile Info-current-file))
- (setq Info-history (cons (list ofile onode opoint)
- Info-history)))))
-
- (defun Info-extract-pointer (name &optional errorname)
- (save-excursion
- (goto-char (point-min))
- (forward-line 1)
- (if (re-search-backward (concat name ":") nil t)
- nil
- (error (concat "Node has no " (capitalize (or errorname name)))))
- (goto-char (match-end 0))
- (Info-following-node-name)))
-
- (defun Info-following-node-name (&optional allowedchars)
- (or allowedchars (setq allowedchars "^,\t\n"))
- (skip-chars-forward " \t")
- (buffer-substring
- (point)
- (let ((allowed (concat "[" allowedchars "]"))
- (skip (concat allowedchars "(")))
- (while (looking-at allowed)
- (skip-chars-forward skip)
- (if (looking-at "(")
- (skip-chars-forward "^)")))
- (skip-chars-backward " \t")
- (point))))
-
- (defun Info-next ()
- "Go to the next node of this node."
- (interactive)
- (Info-goto-node (Info-extract-pointer "next")))
-
- (defun Info-prev ()
- "Go to the previous node of this node."
- (interactive)
- (Info-goto-node (Info-extract-pointer "prev[ious]*" "previous")))
-
- (defun Info-up ()
- "Go to the superior node of this node."
- (interactive)
- (Info-goto-node (Info-extract-pointer "up")))
-
- (defun Info-last ()
- "Go back to the last node visited."
- (interactive)
- (or Info-history
- (error "This is the first Info node you looked at"))
- (let (filename nodename opoint)
- (setq filename (car (car Info-history)))
- (setq nodename (car (cdr (car Info-history))))
- (setq opoint (car (cdr (cdr (car Info-history)))))
- (setq Info-history (cdr Info-history))
- (Info-find-node filename nodename)
- (setq Info-history (cdr Info-history))
- (goto-char opoint)))
-
- (defun Info-directory ()
- "Go to the Info directory node."
- (interactive)
- (Info-find-node "dir" "top"))
-
- (defun Info-follow-reference (footnotename)
- "Follow cross reference named NAME to the node it refers to.
- NAME may be an abbreviation of the reference name."
- (interactive
- (let ((completion-ignore-case t)
- completions default (start-point (point)) str i)
- (save-excursion
- (goto-char (point-min))
- (while (re-search-forward "\\*note[ \n\t]*\\([^:]*\\):" nil t)
- (setq str (buffer-substring
- (match-beginning 1)
- (1- (point))))
- ;; See if this one should be the default.
- (and (null default)
- (< (match-beginning 0) start-point)
- (<= start-point (point))
- (setq default t))
- (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))
- (setq completions
- (cons (cons str nil)
- completions))))
- (if completions
- (list (completing-read (if default
- (concat "Follow reference named: ("
- default ") ")
- "Follow reference named: ")
- completions nil t))
- (error "No cross-references in this node"))))
- (let (i
- (blanks "[ \t\n]+")
- (str (concat "\\*note " footnotename)))
- ;; replace " " with "[ \t\n]+"
- (while (setq i (string-match " " str i))
- (setq str (concat (substring str 0 i)
- blanks
- (substring str (1+ i))))
- (setq i (+ i (length blanks))))
-
- (save-excursion
- (goto-char (point-min))
- (or (re-search-forward str nil t)
- (error "No cross-reference named %s" footnotename))
- (goto-char (+ (match-beginning 0) 5)) ;5 is (length "*note")
- (setq str (Info-extract-menu-node-name "Bad format cross reference")))
-
- (Info-goto-node str)))
-
- (defun Info-extract-menu-node-name (&optional errmessage)
- (skip-chars-forward " \t\n")
- (let ((beg (point))
- str
- i)
- (skip-chars-forward "^:")
- (forward-char 1)
- (setq str (if (looking-at ":")
- (buffer-substring beg (1- (point)))
- (Info-following-node-name "^.,\t")))
- ;; replace regexp "[ \t\n]+" with " "
- (while (setq i (string-match "[ \t\n]+" str i))
- (setq str (concat (substring str 0 i)
- " "
- (substring str (match-end 0))))
- (setq i (+ i 1)))
- str))
-
- (defun Info-menu (menu-item)
- "Go to node for menu item named (or abbreviated) NAME.
- Completion is allowed, and the menu item point is on is the default."
- (interactive
- (let ((completions '())
- ;; If point is within a menu item, use that item as the default
- (default nil)
- (p (point))
- (last nil))
- (save-excursion
- (goto-char (point-min))
- (if (not (search-forward "\n* menu:" nil t))
- (error "No menu in this node"))
- (while (re-search-forward
- "\n\\* \\([^:\t\n]*\\):" nil t)
- (if (and (null default)
- (prog1 (if last (< last p) nil)
- (setq last (match-beginning 0)))
- (<= p last))
- (setq default (car (car completions))))
- (setq completions (cons (cons (buffer-substring
- (match-beginning 1)
- (match-end 1))
- (match-beginning 1))
- completions)))
- (if (and (null default) last
- (< last p)
- (<= p (progn (end-of-line) (point))))
- (setq default (car (car completions)))))
- (let ((item nil))
- (while (null item)
- (setq item (let ((completion-ignore-case t))
- (completing-read (if default
- (format "Menu item (default %s): "
- default)
- "Menu item: ")
- completions nil t)))
- ;; we rely on the bug (which RMS won't change for his own reasons)
- ;; 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))))
- (Info-goto-node (Info-extract-menu-item menu-item)))
-
- (defun Info-extract-menu-item (menu-item)
- (save-excursion
- (goto-char (point-min))
- (or (search-forward "\n* menu:" nil t)
- (error "No menu in this node"))
- (or (search-forward (concat "\n* " menu-item ":") nil t)
- (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)))
-
- (defun Info-extract-menu-counting (count)
- (save-excursion
- (goto-char (point-min))
- (or (search-forward "\n* menu:" nil t)
- (error "No menu in this node"))
- (or (search-forward "\n* " nil t count)
- (error "Too few items in menu"))
- (Info-extract-menu-node-name)))
-
- (defun Info-first-menu-item ()
- "Go to the node of the first menu item."
- (interactive)
- (Info-goto-node (Info-extract-menu-counting 1)))
-
- (defun Info-second-menu-item ()
- "Go to the node of the second menu item."
- (interactive)
- (Info-goto-node (Info-extract-menu-counting 2)))
-
- (defun Info-third-menu-item ()
- "Go to the node of the third menu item."
- (interactive)
- (Info-goto-node (Info-extract-menu-counting 3)))
-
- (defun Info-fourth-menu-item ()
- "Go to the node of the fourth menu item."
- (interactive)
- (Info-goto-node (Info-extract-menu-counting 4)))
-
- (defun Info-fifth-menu-item ()
- "Go to the node of the fifth menu item."
- (interactive)
- (Info-goto-node (Info-extract-menu-counting 5)))
-
- (defun Info-exit ()
- "Exit Info by selecting some other buffer."
- (interactive)
- (switch-to-buffer (prog1 (other-buffer (current-buffer))
- (bury-buffer (current-buffer)))))
-
- (defun Info-undefined ()
- "Make command be undefined in Info."
- (interactive)
- (ding))
-
- (defun Info-help ()
- "Enter the Info tutorial."
- (interactive)
- (Info-find-node "info"
- (if (< (window-height) 23)
- "Help-Small-Screen"
- "Help")))
-
- (defun Info-summary ()
- "Display a brief summary of all Info commands."
- (interactive)
- (save-window-excursion
- (switch-to-buffer "*Help*")
- (erase-buffer)
- (insert (documentation 'Info-mode))
- (goto-char (point-min))
- (let (ch flag
- (event (allocate-event)))
- (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"))
- (setq ch (event-to-character (next-command-event event)))
- (if (/= ?\ ch)
- (progn (setq unread-command-event event) nil)
- flag))
- (scroll-up)))))
-
- (defun Info-get-token (pos start all &optional errorstring)
- "Return the token around POS,
- POS must be somewhere inside the token
- START is a regular expression which will match the
- beginning of the tokens delimited string
- ALL is a regular expression with a single
- parenthized subpattern which is the token to be
- returned. E.g. '{\(.*\)}' would return any string
- enclosed in braces around POS.
- SIG optional fourth argument, controls action on no match
- nil: return nil
- t: beep
- a string: signal an error, using that string."
- (save-excursion
- (goto-char pos)
- (re-search-backward start (max (point-min) (- pos 200)) 'yes)
- (while (and (re-search-forward all (min (point-max) (+ pos 200)) 'yes)
- (not (and (<= (match-beginning 0) pos)
- (> (match-end 0) pos)))))
- (if (and (<= (match-beginning 0) pos)
- (> (match-end 0) pos))
- (buffer-substring (match-beginning 1) (match-end 1))
- (cond ((null errorstring)
- nil)
- ((eq errorstring t)
- (beep)
- nil)
- (t
- (error "No %s around position %d" errorstring pos))))))
-
- (defun Info-follow-nearest-node (event)
- "Follow a node reference near point. Like M, F, N, P or U command.
- At end of the node's text, moves to the next node."
- (interactive "@e")
- (mouse-set-point event)
- (let (node)
- (cond
- ((setq node (Info-get-token (point) "\\*note " "\\*note \\([^:]*\\):" t))
- (Info-follow-reference node))
- ((setq node (Info-get-token (point) "\\* " "\\* \\([^:]*\\)::" t))
- (Info-goto-node node))
- ((setq node (Info-get-token (point) "\\* " "\\* \\([^:]*\\):" t))
- (Info-menu node))
- ((setq node (Info-get-token (point) "Up: " "Up: \\([^,\n\t]*\\)" t))
- (Info-goto-node node))
- ((setq node (Info-get-token (point) "Next: " "Next: \\([^,\n\t]*\\)" t))
- (Info-goto-node node))
- ((setq node (Info-get-token (point) "File: " "File: \\([^,\n\t]*\\)" t))
- (Info-goto-node "Top"))
- ((setq node (Info-get-token (point) "Prev: " "Prev: \\([^,\n\t]*\\)" t))
- (Info-goto-node node))
- ((save-excursion (forward-line 1) (eobp))
- (Info-next)))
- ))
-
- (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 " " 'scroll-up)
- (define-key Info-mode-map "1" 'Info-first-menu-item)
- (define-key Info-mode-map "2" 'Info-second-menu-item)
- (define-key Info-mode-map "3" 'Info-third-menu-item)
- (define-key Info-mode-map "4" 'Info-fourth-menu-item)
- (define-key Info-mode-map "5" 'Info-fifth-menu-item)
- (define-key Info-mode-map "6" 'undefined)
- (define-key Info-mode-map "7" 'undefined)
- (define-key Info-mode-map "8" 'undefined)
- (define-key Info-mode-map "9" 'undefined)
- (define-key Info-mode-map "0" 'undefined)
- (define-key Info-mode-map "?" 'Info-summary)
- (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 "l" 'Info-last)
- (define-key Info-mode-map "m" 'Info-menu)
- (define-key Info-mode-map "n" 'Info-next)
- (define-key Info-mode-map "p" 'Info-prev)
- (define-key Info-mode-map "q" 'Info-exit)
- (define-key Info-mode-map "s" 'Info-search)
- (define-key Info-mode-map "u" 'Info-up)
- (define-key Info-mode-map "\177" 'scroll-down)
-
- ;;(define-key Info-mode-map 'button1 'mouse-scroll-up-full)
- ;;(define-key Info-mode-map 'button2 'Info-follow-nearest-node)
- ;;(define-key Info-mode-map 'button3 'mouse-scroll-down-full)
-
- (define-key Info-mode-map 'button2 'Info-follow-indicated-node)
- (define-key Info-mode-map 'button3 'Info-select-node-menu)
- )
-
- ;; Info mode is suitable only for specially formatted data.
- (put 'info-mode 'mode-class 'special)
-
- (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.
-
- h Invoke the Info tutorial.
-
- Selecting other nodes:
- n Move to the \"next\" node of this node.
- p Move to the \"previous\" node of this node.
- u Move \"up\" from this node.
- m Pick menu item specified by name (or abbreviation).
- Picking a menu item causes another node to be selected.
- f Follow a cross reference. Reads name of reference.
- l Move to the last node you were at.
-
- Moving within a node:
- Space scroll forward a full screen. DEL scroll backward.
- b Go to beginning of node.
-
- Mouse commands:
- Left Button Set point
- Middle Button Click on a highlighted node reference to go to it
- Right Button Pop up a menu of applicable Info commands
-
- Advanced commands:
- q Quit Info: reselect previously selected buffer.
- e Edit contents of selected node.
- 1 Pick first item in node's menu.
- 2, 3, 4, 5 Pick second ... fifth item in node's menu.
- g Move to node specified by name.
- You may include a filename as well, as (FILENAME)NODENAME.
- s Search through this Info file for specified regexp,
- and select the node in which the next occurrence is found."
- (kill-all-local-variables)
- (setq major-mode 'Info-mode)
- (setq mode-name "Info")
- (use-local-map Info-mode-map)
- (set-syntax-table text-mode-syntax-table)
- (setq local-abbrev-table text-mode-abbrev-table)
- (setq case-fold-search t)
- (setq buffer-read-only t)
- (make-local-variable 'Info-current-file)
- (make-local-variable 'Info-current-subfile)
- (make-local-variable 'Info-current-node)
- (make-local-variable 'Info-tag-table-marker)
- (make-local-variable 'Info-history)
- (Info-set-mode-line))
-
- (defvar Info-edit-map nil
- "Local keymap used within `e' command of Info.")
- (if Info-edit-map
- nil
- (setq Info-edit-map (make-sparse-keymap))
- (set-keymap-parent Info-edit-map text-mode-map)
- (define-key Info-edit-map "\C-c\C-c" 'Info-cease-edit))
-
- ;; Info-edit mode is suitable only for specially formatted data.
- (put 'info-edit-mode 'mode-class 'special)
-
- (defun Info-edit-mode ()
- "Major mode for editing the contents of an Info node.
- Like text mode with the addition of Info-cease-edit
- which returns to Info mode for browsing.
- \\{Info-edit-map}"
- )
-
- (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"))
- (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)
- ;; Make mode line update.
- (set-buffer-modified-p (buffer-modified-p))
- (message (substitute-command-keys
- "Editing: Type \\[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)
- ;; Make mode line update.
- (set-buffer-modified-p (buffer-modified-p))
- (and (marker-position Info-tag-table-marker)
- (buffer-modified-p)
- (message "Tags may have changed. Use Info-tagify if necessary")))
-
-
- ;;; fontification and mousability
-
- (defvar Info-fontify t)
-
- ;(defvar Info-faces-initted nil)
- ;(defun Info-init-faces ()
- ; (if Info-faces-initted
- ; nil
- ; (make-face 'info-node)
- ; (make-face 'info-xref)
- ; (or (face-differs-from-default-p 'info-node)
- ; (copy-face 'bold-italic 'info-node))
- ; (or (face-differs-from-default-p 'info-xref)
- ; (copy-face 'bold 'info-xref))
- ; (setq Info-faces-initted t)))
-
- (make-face 'info-node)
- (make-face 'info-xref)
- (or (face-differs-from-default-p 'info-node)
- (copy-face 'bold-italic 'info-node))
- (or (face-differs-from-default-p 'info-xref)
- (copy-face 'bold 'info-xref))
-
- (defun Info-fontify-node ()
- ;; (Info-init-faces)
- (if Info-fontify
- (save-excursion
- (map-extents (function (lambda (x y)
- (if (eq (extent-data x) 'info)
- (delete-extent x))))
- (current-buffer) (point-min) (point-max) nil)
- (let ((case-fold-search t)
- extent)
- (goto-char (point-min))
- (if (looking-at "^File: [^,: \t]+,?[ \t]+")
- (progn
- (goto-char (match-end 0))
- (while
- (looking-at "[ \t]*[^:, \t\n]+:[ \t]+\\([^:,\t\n]+\\),?")
- (goto-char (match-end 0))
- (setq extent (make-extent (match-beginning 1) (match-end 1)))
- (set-extent-face extent 'info-xref)
- (set-extent-data extent 'info)
- (set-extent-attribute extent 'highlight))))
- (goto-char (point-min))
- (while (re-search-forward "\\*note[ \n\t]*\\([^:]*\\):" nil t)
- (if (= (char-after (1- (match-beginning 0))) ?\") ; hack
- nil
- (setq extent (make-extent (match-beginning 0) (match-end 1)))
- (set-extent-face extent 'info-xref)
- (set-extent-data extent 'info)
- (set-extent-attribute extent 'highlight)))
- (goto-char (point-min))
- (if (search-forward "\n* menu:" nil t)
- (while (re-search-forward "^\\* \\([^:\t\n]*\\):" nil t)
- (setq extent (make-extent (match-beginning 0) (match-end 1)))
- (set-extent-face extent 'info-node)
- (set-extent-data extent 'info)
- (set-extent-attribute extent 'highlight)))))))
-
- (defun Info-indicated-node (event)
- (save-window-excursion
- (save-excursion
- (mouse-set-point event)
- (let* ((buffer (window-buffer (event-window event)))
- (p (event-point event))
- (extent (and p (extent-at p buffer 'highlight)))
- (text (and extent
- (save-excursion
- (set-buffer buffer)
- (buffer-substring
- (extent-start-position extent)
- (extent-end-position extent)))))
- (case-fold-search t)
- i)
- (cond ((null extent)
- nil)
- ((string-match "\\`\\*note[ \n\t]*\\([^:]*\\):?\\'" text)
- ;; it's a cross-reference
- (setq text (substring text (match-beginning 1) (match-end 1)))
- (while (setq i (string-match "[ \n\t]+" text i))
- (setq text (concat (substring text 0 i) " "
- (substring text (match-end 0))))
- (setq i (1+ i)))
- (list 'Info-follow-reference text))
- ((and (save-excursion (goto-char (extent-start-position extent))
- (= ?\n (preceding-char)))
- (string-match "\\`\\* \\([^:\t\n]+\\):?\\'" text))
- ;; it's a menu entry
- (setq text (substring text (match-beginning 1) (match-end 1)))
- (list 'Info-menu text))
- (t
- ;; otherwise, it must be a node-name in the first line
- (list 'Info-goto-node text)))))))
-
-
- (defun Info-follow-indicated-node (event)
- "Follow the crossreference or menu item at the click-location."
- (interactive "e")
- (mouse-set-point event)
- (eval (or (Info-indicated-node event)
- (error "click on a cross-reference to follow"))))
-
-
- (defun Info-select-node-menu (event)
- "Pops up a menu of applicable Info commands."
- (interactive "e")
- (select-window (event-window event))
- (let ((case-fold-search t)
- up-p prev-p next-p menu
- i text xrefs subnodes in)
- (save-excursion
- (goto-char (point-min))
- (if (looking-at ".*\\bNext:") (setq next-p t))
- (if (looking-at ".*\\bPrev:") (setq prev-p t))
- (if (looking-at ".*Up:") (setq up-p t))
- (setq menu (nconc (list "Info" "Info Commands:" "----")
- (if (setq in (Info-indicated-node event))
- (list (vector (car (cdr in)) in t)))
- (list
- ["Goto Info Top-level" Info-directory t]
- (vector "Next Node" 'Info-next next-p)
- (vector "Previous Node" 'Info-prev prev-p)
- (vector "Parent Node (Up)" 'Info-up up-p)
- ["Goto Node..." Info-goto-node t]
- ["Goto Last Visited Node" Info-last t])))
- (while (re-search-forward "\\*note[ \n\t]*\\([^:]*\\):" nil t)
- (setq text (buffer-substring (match-beginning 1) (match-end 1)))
- (while (setq i (string-match "[ \n\t]+" text i))
- (setq text (concat (substring text 0 i) " "
- (substring text (match-end 0))))
- (setq i (1+ i)))
- (setq xrefs (cons text xrefs)))
- (setq xrefs (nreverse xrefs))
- (goto-char (point-min))
- (if (search-forward "\n* menu:" nil t)
- (while (re-search-forward "^\\* \\([^:\t\n]*\\):" nil t)
- (setq text (buffer-substring (match-beginning 1) (match-end 1)))
- (setq subnodes (cons text subnodes))))
- (setq subnodes (nreverse subnodes)))
- (if (or xrefs subnodes)
- (nconc menu (list "-----")))
- (if xrefs
- (nconc menu
- (list
- (apply 'list "Cross-References"
- (mapcar '(lambda (xref)
- (vector xref
- (list 'Info-follow-reference xref)
- t))
- xrefs)))))
- (if subnodes
- (nconc menu
- (list
- (apply 'list "Sub-Nodes"
- (mapcar '(lambda (node)
- (vector node (list 'Info-menu node) t))
- subnodes)))))
- (popup-menu menu)))
-