--- /dev/null
+;;; info-look.el --- major-mode-sensitive Info index lookup facility.
+;; An older version of this was known as libc.el.
+
+;; Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+
+;; Author: Ralph Schleicher <rs@purple.UL.BaWue.DE>
+;; Keywords: help languages
+
+;; 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, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'info)
+(eval-and-compile
+ (condition-case nil
+ (require 'custom)
+ (error
+ (defmacro defgroup (&rest arg)
+ nil)
+ (defmacro defcustom (symbol value doc &rest arg)
+ `(defvar ,symbol ,value ,doc ,@arg)))))
+
+(defgroup info-lookup nil
+ "Major mode sensitive help agent."
+ :group 'help :group 'languages)
+
+(defvar info-lookup-mode nil
+ "Symbol of the current buffer's help mode.
+Help is provided according to the buffer's major mode if value is nil.
+Automatically becomes buffer local when set in any fashion.")
+(make-variable-buffer-local 'info-lookup-mode)
+
+(defcustom info-lookup-other-window-flag t
+ "Non-nil means pop up the Info buffer in another window."
+ :group 'info-lookup :type 'boolean)
+
+(defcustom info-lookup-highlight-face 'highlight
+ "Face for highlighting looked up help items.
+Setting this variable to nil disables highlighting."
+ :group 'info-lookup :type 'face)
+
+(defvar info-lookup-highlight-overlay nil
+ "Overlay object used for highlighting.")
+
+(defcustom info-lookup-file-name-alist
+ '(("\\`configure\\.in\\'" . autoconf-mode)
+ ("\\`aclocal\\.m4\\'" . autoconf-mode)
+ ("\\`acsite\\.m4\\'" . autoconf-mode)
+ ("\\`acinclude\\.m4\\'" . autoconf-mode))
+ "Alist of file names handled specially.
+List elements are cons cells of the form
+
+ (REGEXP . MODE)
+
+If a file name matches REGEXP, then use help mode MODE instead of the
+buffer's major mode."
+ :group 'info-lookup :type '(repeat (cons (string :tag "Regexp")
+ (symbol :tag "Mode"))))
+
+(defvar info-lookup-history nil
+ "History of previous input lines.")
+
+(defvar info-lookup-alist nil
+ "Alist of known help topics.
+Cons cells are of the form
+
+ (HELP-TOPIC . HELP-DATA)
+
+HELP-TOPIC is the symbol of a help topic.
+HELP-DATA is a HELP-TOPIC's public data set.
+ Value is an alist with elements of the form
+
+ (HELP-MODE REGEXP IGNORE-CASE DOC-SPEC PARSE-RULE OTHER-MODES)
+
+HELP-MODE is a mode's symbol.
+REGEXP is a regular expression matching those help items whose
+ documentation can be looked up via DOC-SPEC.
+IGNORE-CASE is non-nil if help items are case insensitive.
+DOC-SPEC is a list of documentation specifications of the form
+
+ (INFO-NODE TRANS-FUNC PREFIX SUFFIX)
+
+INFO-NODE is the name (including file name part) of an Info index.
+TRANS-FUNC is a function translating index entries into help items;
+ nil means add only those index entries matching REGEXP, a string
+ means prepend string to the first word of all index entries.
+PREFIX and SUFFIX are parts of a regular expression. If one of
+ them is non-nil then search the help item's Info node for the
+ first occurrence of the regular expression `PREFIX ITEM SUFFIX'.
+ ITEM will be highlighted with `info-lookup-highlight-face' if this
+ variable is not nil.
+PARSE-RULE is either the symbol name of a function or a regular
+ expression for guessing the default help item at point. Fuzzy
+ regular expressions like \"[_a-zA-Z0-9]+\" do a better job if
+ there are no clear delimiters; do not try to write too complex
+ expressions. PARSE-RULE defaults to REGEXP.
+OTHER-MODES is a list of cross references to other help modes.")
+
+(defsubst info-lookup->topic-value (topic)
+ (cdr (assoc topic info-lookup-alist)))
+
+(defsubst info-lookup->mode-value (topic mode)
+ (assoc mode (info-lookup->topic-value topic)))
+
+(defsubst info-lookup->regexp (topic mode)
+ (nth 1 (info-lookup->mode-value topic mode)))
+
+(defsubst info-lookup->ignore-case (topic mode)
+ (nth 2 (info-lookup->mode-value topic mode)))
+
+(defsubst info-lookup->doc-spec (topic mode)
+ (nth 3 (info-lookup->mode-value topic mode)))
+
+(defsubst info-lookup->parse-rule (topic mode)
+ (nth 4 (info-lookup->mode-value topic mode)))
+
+(defsubst info-lookup->other-modes (topic mode)
+ (nth 5 (info-lookup->mode-value topic mode)))
+
+(eval-and-compile
+ (mapcar (lambda (keyword)
+ (or (boundp keyword)
+ (set keyword keyword)))
+ '(:topic :mode :regexp :ignore-case
+ :doc-spec :parse-rule :other-modes)))
+
+(defun info-lookup-add-help (&rest arg)
+ "Add or update a help specification.
+Function arguments are one or more options of the form
+
+ KEYWORD ARGUMENT
+
+KEYWORD is either `:topic', `:mode', `:regexp', `:ignore-case',
+ `:doc-spec', `:parse-rule', or `:other-modes'.
+ARGUMENT has a value as explained in the documentation of the
+ variable `info-lookup-alist'.
+
+If no topic or mode option has been specified, then the help topic defaults
+to `symbol', and the help mode defaults to the current major mode."
+ (apply 'info-lookup-add-help* nil arg))
+
+(defun info-lookup-maybe-add-help (&rest arg)
+ "Add a help specification iff no one is defined.
+See the documentation of the function `info-lookup-add-help'
+for more details."
+ (apply 'info-lookup-add-help* t arg))
+
+(defun info-lookup-add-help* (maybe &rest arg)
+ (let (topic mode regexp ignore-case doc-spec
+ parse-rule other-modes keyword value)
+ (setq topic 'symbol
+ mode major-mode
+ regexp "\\w+")
+ (while arg
+ (setq keyword (car arg))
+ (or (symbolp keyword)
+ (error "Junk in argument list \"%S\"" arg))
+ (setq arg (cdr arg))
+ (and (null arg)
+ (error "Keyword \"%S\" is missing an argument" keyword))
+ (setq value (car arg)
+ arg (cdr arg))
+ (cond ((eq keyword :topic)
+ (setq topic value))
+ ((eq keyword :mode)
+ (setq mode value))
+ ((eq keyword :regexp)
+ (setq regexp value))
+ ((eq keyword :ignore-case)
+ (setq ignore-case value))
+ ((eq keyword :doc-spec)
+ (setq doc-spec value))
+ ((eq keyword :parse-rule)
+ (setq parse-rule value))
+ ((eq keyword :other-modes)
+ (setq other-modes value))
+ (t
+ (error "Unknown keyword \"%S\"" keyword))))
+ (or (and maybe (info-lookup->mode-value topic mode))
+ (let* ((data (list regexp ignore-case doc-spec parse-rule other-modes))
+ (topic-cell (or (assoc topic info-lookup-alist)
+ (car (setq info-lookup-alist
+ (cons (cons topic nil)
+ info-lookup-alist)))))
+ (mode-cell (assoc mode topic-cell)))
+ (if (null mode-cell)
+ (setcdr topic-cell (cons (cons mode data) (cdr topic-cell)))
+ (setcdr mode-cell data))))
+ nil))
+
+(defvar info-lookup-cache nil
+ "Cache storing data maintained automatically by the program.
+Value is an alist with cons cell of the form
+
+ (HELP-TOPIC . ((HELP-MODE INITIALIZED COMPLETIONS REFER-MODES) ...))
+
+HELP-TOPIC is the symbol of a help topic.
+HELP-MODE is a mode's symbol.
+INITIALIZED is nil if HELP-MODE is uninitialized, t if
+ HELP-MODE is initialized, and `0' means HELP-MODE is
+ initialized but void.
+COMPLETIONS is an alist of documented help items.
+REFER-MODES is a list of other help modes to use.")
+
+(defsubst info-lookup->cache (topic)
+ (or (assoc topic info-lookup-cache)
+ (car (setq info-lookup-cache
+ (cons (cons topic nil)
+ info-lookup-cache)))))
+
+(defun info-lookup->topic-cache (topic)
+ (cdr (info-lookup->cache topic)))
+
+(defun info-lookup->mode-cache (topic mode)
+ (assoc mode (info-lookup->topic-cache topic)))
+
+(defun info-lookup->initialized (topic mode)
+ (nth 1 (info-lookup->mode-cache topic mode)))
+
+(defun info-lookup->completions (topic mode)
+ (or (info-lookup->initialized topic mode)
+ (info-lookup-setup-mode topic mode))
+ (nth 2 (info-lookup->mode-cache topic mode)))
+
+(defun info-lookup->refer-modes (topic mode)
+ (or (info-lookup->initialized topic mode)
+ (info-lookup-setup-mode topic mode))
+ (nth 3 (info-lookup->mode-cache topic mode)))
+
+(defun info-lookup->all-modes (topic mode)
+ (cons mode (info-lookup->refer-modes topic mode)))
+
+(defun info-lookup-quick-all-modes (topic mode)
+ (cons mode (info-lookup->other-modes topic mode)))
+
+;;;###autoload
+(defun info-lookup-reset ()
+ "Throw away all cached data.
+This command is useful if the user wants to start at the beginning without
+quitting Emacs, for example, after some Info documents were updated on the
+system."
+ (interactive)
+ (setq info-lookup-cache nil))
+
+;;;###autoload
+(defun info-lookup-symbol (symbol &optional mode)
+ "Display the documentation of a symbol.
+If called interactively, SYMBOL will be read from the mini-buffer.
+Prefix argument means unconditionally insert the default symbol name
+into the mini-buffer so that it can be edited.
+The default symbol is the one found at point."
+ (interactive
+ (info-lookup-interactive-arguments 'symbol))
+ (info-lookup 'symbol symbol mode))
+
+;;;###autoload
+(defun info-lookup-file (file &optional mode)
+ "Display the documentation of a file.
+If called interactively, FILE will be read from the mini-buffer.
+Prefix argument means unconditionally insert the default file name
+into the mini-buffer so that it can be edited.
+The default file name is the one found at point."
+ (interactive
+ (info-lookup-interactive-arguments 'file))
+ (info-lookup 'file file mode))
+
+(defun info-lookup-interactive-arguments (topic)
+ "Return default value and help mode for help topic TOPIC."
+ (let* ((mode (if (info-lookup->mode-value topic (info-lookup-select-mode))
+ info-lookup-mode
+ (info-lookup-change-mode topic)))
+ (completions (info-lookup->completions topic mode))
+ (default (info-lookup-guess-default topic mode))
+ (input (if (or current-prefix-arg (not (assoc default completions)))
+ default))
+ (completion-ignore-case (info-lookup->ignore-case topic mode))
+ (enable-recursive-minibuffers t)
+ (value (completing-read
+ (if (and default (not input))
+ (format "Describe %s (default %s): " topic default)
+ (format "Describe %s: " topic))
+ completions nil nil input 'info-lookup-history)))
+ (list (if (equal value "") default value) mode)))
+
+(defun info-lookup-select-mode ()
+ (when (and (not info-lookup-mode) (buffer-file-name))
+ (let ((file-name (file-name-nondirectory (buffer-file-name)))
+ (file-name-alist info-lookup-file-name-alist))
+ (while (and (not info-lookup-mode) file-name-alist)
+ (when (string-match (caar file-name-alist) file-name)
+ (setq info-lookup-mode (cdar file-name-alist)))
+ (setq file-name-alist (cdr file-name-alist)))))
+ (or info-lookup-mode (setq info-lookup-mode major-mode)))
+
+(defun info-lookup-change-mode (topic)
+ (let* ((completions (mapcar (lambda (arg)
+ (cons (symbol-name (car arg)) (car arg)))
+ (info-lookup->topic-value topic)))
+ (mode (completing-read
+ (format "Use %s help mode: " topic)
+ completions nil t nil 'info-lookup-history)))
+ (or (setq mode (cdr (assoc mode completions)))
+ (error "No %s help available" topic))
+ (or (info-lookup->mode-value topic mode)
+ (error "No %s help available for `%s'" topic mode))
+ (setq info-lookup-mode mode)))
+
+(defun info-lookup (topic item mode)
+ "Display the documentation of a help item."
+ (or mode (setq mode (info-lookup-select-mode)))
+ (or (info-lookup->mode-value topic mode)
+ (error "No %s help available for `%s'" topic mode))
+ (let ((entry (or (assoc (if (info-lookup->ignore-case topic mode)
+ (downcase item) item)
+ (info-lookup->completions topic mode))
+ (error "Not documented as a %s: %s" topic (or item ""))))
+ (modes (info-lookup->all-modes topic mode))
+ (window (selected-window))
+ found doc-spec node prefix suffix doc-found)
+ (if (not info-lookup-other-window-flag)
+ (info)
+ (save-window-excursion (info))
+ (switch-to-buffer-other-window "*info*"))
+ (while (and (not found) modes)
+ (setq doc-spec (info-lookup->doc-spec topic (car modes)))
+ (while (and (not found) doc-spec)
+ (setq node (nth 0 (car doc-spec))
+ prefix (nth 2 (car doc-spec))
+ suffix (nth 3 (car doc-spec)))
+ (when (condition-case error-data
+ (progn
+ (Info-goto-node node)
+ (setq doc-found t))
+ (error
+ (message "Cannot access Info node %s" node)
+ (sit-for 1)
+ nil))
+ (condition-case nil
+ (progn
+ (Info-menu (or (cdr entry) item))
+ (setq found t)
+ (if (or prefix suffix)
+ (let ((case-fold-search
+ (info-lookup->ignore-case topic (car modes)))
+ (buffer-read-only nil))
+ (goto-char (point-min))
+ (re-search-forward
+ (concat prefix (regexp-quote item) suffix))
+ (goto-char (match-beginning 0))
+ (and window-system info-lookup-highlight-face
+ ;; Search again for ITEM so that the first
+ ;; occurence of ITEM will be highlighted.
+ (re-search-forward (regexp-quote item))
+ (let ((start (match-beginning 0))
+ (end (match-end 0)))
+ (if (overlayp info-lookup-highlight-overlay)
+ (move-overlay info-lookup-highlight-overlay
+ start end (current-buffer))
+ (setq info-lookup-highlight-overlay
+ (make-overlay start end))))
+ (overlay-put info-lookup-highlight-overlay
+ 'face info-lookup-highlight-face)))))
+ (error nil)))
+ (setq doc-spec (cdr doc-spec)))
+ (setq modes (cdr modes)))
+ (or doc-found
+ (error "Info documentation for lookup was not found"))
+ ;; Don't leave the Info buffer if the help item couldn't be looked up.
+ (if (and info-lookup-other-window-flag found)
+ (select-window window))))
+
+(defun info-lookup-setup-mode (topic mode)
+ "Initialize the internal data structure."
+ (or (info-lookup->initialized topic mode)
+ (let (cell data (initialized 0) completions refer-modes)
+ (if (not (info-lookup->mode-value topic mode))
+ (message "No %s help available for `%s'" topic mode)
+ ;; Recursively setup cross references.
+ ;; But refer only to non-void modes.
+ (mapcar (lambda (arg)
+ (or (info-lookup->initialized topic arg)
+ (info-lookup-setup-mode topic arg))
+ (and (eq (info-lookup->initialized topic arg) t)
+ (setq refer-modes (cons arg refer-modes))))
+ (info-lookup->other-modes topic mode))
+ (setq refer-modes (nreverse refer-modes))
+ ;; Build the full completion alist.
+ (setq completions
+ (nconc (info-lookup-make-completions topic mode)
+ (apply 'append
+ (mapcar (lambda (arg)
+ (info-lookup->completions topic arg))
+ refer-modes))))
+ (setq initialized t))
+ ;; Update `info-lookup-cache'.
+ (setq cell (info-lookup->mode-cache topic mode)
+ data (list initialized completions refer-modes))
+ (if (not cell)
+ (setcdr (info-lookup->cache topic)
+ (cons (cons mode data) (info-lookup->topic-cache topic)))
+ (setcdr cell data))
+ initialized)))
+
+(defun info-lookup-make-completions (topic mode)
+ "Create a unique alist from all index entries."
+ (let ((doc-spec (info-lookup->doc-spec topic mode))
+ (regexp (concat "^\\(" (info-lookup->regexp topic mode)
+ "\\)\\([ \t].*\\)?$"))
+ node trans entry item prefix result doc-found
+ (buffer (get-buffer-create " temp-info-look")))
+ (with-current-buffer buffer
+ (Info-mode))
+ (while doc-spec
+ (setq node (nth 0 (car doc-spec))
+ trans (cond ((eq (nth 1 (car doc-spec)) nil)
+ (lambda (arg)
+ (if (string-match regexp arg)
+ (match-string 1 arg))))
+ ((stringp (nth 1 (car doc-spec)))
+ (setq prefix (nth 1 (car doc-spec)))
+ (lambda (arg)
+ (if (string-match "^\\([^: \t\n]+\\)" arg)
+ (concat prefix (match-string 1 arg)))))
+ (t (nth 1 (car doc-spec)))))
+ (with-current-buffer buffer
+ (message "Processing Info node `%s'..." node)
+ (when (condition-case error-data
+ (progn
+ (Info-goto-node node)
+ (setq doc-found t))
+ (error
+ (message "Cannot access Info node `%s'" node)
+ (sit-for 1)
+ nil))
+ (condition-case nil
+ (progn
+ (goto-char (point-min))
+ (and (search-forward "\n* Menu:" nil t)
+ (while (re-search-forward "\n\\* \\([^:\t\n]*\\):" nil t)
+ (setq entry (match-string 1)
+ item (funcall trans entry))
+ (and (info-lookup->ignore-case topic mode)
+ (setq item (downcase item)))
+ (and (string-equal entry item)
+ (setq entry nil))
+ (or (assoc item result)
+ (setq result (cons (cons item entry) result))))))
+ (error nil))))
+ (message "Processing Info node `%s'...done" node)
+ (setq doc-spec (cdr doc-spec)))
+ (or doc-found
+ (error "Info documentation for lookup was not found"))
+ result))
+
+(defun info-lookup-guess-default (topic mode)
+ "Pick up default item at point (with favor to look back).
+Return nil if there is nothing appropriate."
+ (let ((modes (info-lookup->all-modes topic mode))
+ (start (point)) guess whitespace)
+ (while (and (not guess) modes)
+ (setq guess (info-lookup-guess-default* topic (car modes))
+ modes (cdr modes))
+ (goto-char start))
+ ;; Collapse whitespace characters.
+ (and guess (concat (delete nil (mapcar (lambda (ch)
+ (if (or (char-equal ch ? )
+ (char-equal ch ?\t)
+ (char-equal ch ?\n))
+ (if (not whitespace)
+ (setq whitespace ? ))
+ (setq whitespace nil) ch))
+ guess))))))
+
+(defun info-lookup-guess-default* (topic mode)
+ (let ((case-fold-search (info-lookup->ignore-case topic mode))
+ (rule (or (info-lookup->parse-rule topic mode)
+ (info-lookup->regexp topic mode)))
+ (start (point)) end regexp subexp result)
+ (if (symbolp rule)
+ (setq result (funcall rule))
+ (if (consp rule)
+ (setq regexp (car rule)
+ subexp (cdr rule))
+ (setq regexp rule
+ subexp 0))
+ (skip-chars-backward " \t\n") (setq end (point))
+ (while (and (re-search-backward regexp nil t)
+ (looking-at regexp)
+ (>= (match-end 0) end))
+ (setq result (match-string subexp)))
+ (if (not result)
+ (progn
+ (goto-char start)
+ (skip-chars-forward " \t\n")
+ (and (looking-at regexp)
+ (setq result (match-string subexp))))))
+ result))
+
+(defun info-lookup-guess-c-symbol ()
+ "Get the C symbol at point."
+ (condition-case nil
+ (progn
+ (backward-sexp)
+ (let ((start (point)) prefix name)
+ ;; Test for a leading `struct', `union', or `enum' keyword
+ ;; but ignore names like `foo_struct'.
+ (setq prefix (and (< (skip-chars-backward " \t\n") 0)
+ (< (skip-chars-backward "_a-zA-Z0-9") 0)
+ (looking-at "\\(struct\\|union\\|enum\\)\\s ")
+ (concat (match-string 1) " ")))
+ (goto-char start)
+ (and (looking-at "[_a-zA-Z][_a-zA-Z0-9]*")
+ (setq name (match-string 0)))
+ ;; Caveat! Look forward if point is at `struct' etc.
+ (and (not prefix)
+ (or (string-equal name "struct")
+ (string-equal name "union")
+ (string-equal name "enum"))
+ (looking-at "[a-z]+\\s +\\([_a-zA-Z][_a-zA-Z0-9]*\\)")
+ (setq prefix (concat name " ")
+ name (match-string 1)))
+ (and (or prefix name)
+ (concat prefix name))))
+ (error nil)))
+
+;;;###autoload
+(defun info-complete-symbol (&optional mode)
+ "Perform completion on symbol preceding point."
+ (interactive)
+ (info-complete 'symbol
+ (or mode
+ (if (info-lookup->mode-value
+ 'symbol (info-lookup-select-mode))
+ info-lookup-mode
+ (info-lookup-change-mode 'symbol)))))
+
+;;;###autoload
+(defun info-complete-file (&optional mode)
+ "Perform completion on file preceding point."
+ (interactive)
+ (info-complete 'file
+ (or mode
+ (if (info-lookup->mode-value
+ 'file (info-lookup-select-mode))
+ info-lookup-mode
+ (info-lookup-change-mode 'file)))))
+
+(defun info-complete (topic mode)
+ "Try to complete a help item."
+ (barf-if-buffer-read-only)
+ (or mode (setq mode (info-lookup-select-mode)))
+ (or (info-lookup->mode-value topic mode)
+ (error "No %s completion available for `%s'" topic mode))
+ (let ((modes (info-lookup-quick-all-modes topic mode))
+ (start (point))
+ try)
+ (while (and (not try) modes)
+ (setq mode (car modes)
+ modes (cdr modes)
+ try (info-lookup-guess-default* topic mode))
+ (goto-char start))
+ (and (not try)
+ (error "Found no %S to complete" topic))
+ (let ((completions (info-lookup->completions topic mode))
+ (completion-ignore-case (info-lookup->ignore-case topic mode))
+ completion)
+ (setq completion (try-completion try completions))
+ (cond ((not completion)
+ (ding)
+ (message "No match"))
+ ((stringp completion)
+ (or (assoc completion completions)
+ (setq completion (completing-read
+ (format "Complete %S: " topic)
+ completions nil t completion
+ info-lookup-history)))
+ (delete-region (- start (length try)) start)
+ (insert completion))
+ (t
+ (message "%s is complete"
+ (capitalize (prin1-to-string topic))))))))
+
+\f
+;;; Initialize some common modes.
+
+(info-lookup-maybe-add-help
+ :mode 'c-mode :topic 'symbol
+ :regexp "\\(struct \\|union \\|enum \\)?[_a-zA-Z][_a-zA-Z0-9]*"
+ :doc-spec '(("(libc)Function Index" nil
+ "^[ \t]+- \\(Function\\|Macro\\): .*\\<" "\\>")
+ ("(libc)Variable Index" nil
+ "^[ \t]+- \\(Variable\\|Macro\\): .*\\<" "\\>")
+ ("(libc)Type Index" nil
+ "^[ \t]+- Data Type: \\<" "\\>")
+ ("(termcap)Var Index" nil
+ "^[ \t]*`" "'"))
+ :parse-rule 'info-lookup-guess-c-symbol)
+
+(info-lookup-maybe-add-help
+ :mode 'c-mode :topic 'file
+ :regexp "[_a-zA-Z0-9./+-]+"
+ :doc-spec '(("(libc)File Index")))
+
+(info-lookup-maybe-add-help
+ :mode 'bison-mode
+ :regexp "[:;|]\\|%\\([%{}]\\|[_a-z]+\\)\\|YY[_A-Z]+\\|yy[_a-z]+"
+ :doc-spec '(("(bison)Index" nil
+ "`" "'"))
+ :parse-rule "[:;|]\\|%\\([%{}]\\|[_a-zA-Z][_a-zA-Z0-9]*\\)"
+ :other-modes '(c-mode))
+
+(info-lookup-maybe-add-help
+ :mode 'makefile-mode
+ :regexp "\\$[^({]\\|\\.[_A-Z]*\\|[_a-zA-Z][_a-zA-Z0-9-]*"
+ :doc-spec '(("(make)Name Index" nil
+ "^[ \t]*`" "'"))
+ :parse-rule "\\$[^({]\\|\\.[_A-Z]*\\|[_a-zA-Z0-9-]+")
+
+(info-lookup-maybe-add-help
+ :mode 'texinfo-mode
+ :regexp "@\\([a-zA-Z]+\\|[^a-zA-Z]\\)"
+ :doc-spec '(("(texinfo)Command and Variable Index"
+ ;; Ignore Emacs commands and prepend a `@'.
+ (lambda (item)
+ (if (string-match "^\\([a-zA-Z]+\\|[^a-zA-Z]\\)\\( .*\\)?$" item)
+ (concat "@" (match-string 1 item))))
+ "`" "'")))
+
+(info-lookup-maybe-add-help
+ :mode 'm4-mode
+ :regexp "[_a-zA-Z][_a-zA-Z0-9]*"
+ :doc-spec '(("(m4)Macro index"))
+ :parse-rule "[_a-zA-Z0-9]+")
+
+(info-lookup-maybe-add-help
+ :mode 'autoconf-mode
+ :regexp "A[CM]_[_A-Z0-9]+"
+ :doc-spec '(("(autoconf)Macro Index" "AC_"
+ "^[ \t]+- \\(Macro\\|Variable\\): .*\\<" "\\>")
+ ("(automake)Index" nil
+ "^[ \t]*`" "'"))
+ ;; Autoconf symbols are M4 macros. Thus use M4's parser.
+ :parse-rule 'ignore
+ :other-modes '(m4-mode))
+
+(info-lookup-maybe-add-help
+ :mode 'awk-mode
+ :regexp "[_a-zA-Z]+"
+ :doc-spec '(("(gawk)Index"
+ (lambda (item)
+ (let ((case-fold-search nil))
+ (cond
+ ;; `BEGIN' and `END'.
+ ((string-match "^\\([A-Z]+\\) special pattern\\b" item)
+ (match-string 1 item))
+ ;; `if', `while', `do', ...
+ ((string-match "^\\([a-z]+\\) statement\\b" item)
+ (if (not (string-equal (match-string 1 item) "control"))
+ (match-string 1 item)))
+ ;; `NR', `NF', ...
+ ((string-match "^[A-Z]+$" item)
+ item)
+ ;; Built-in functions (matches to many entries).
+ ((string-match "^[a-z]+$" item)
+ item))))
+ "`" "\\([ \t]*([^)]*)\\)?'")))
+
+(info-lookup-maybe-add-help
+ :mode 'perl-mode
+ :regexp "[$@%][^a-zA-Z]\\|\\$\\^[A-Z]\\|[$@%]?[a-zA-Z][_a-zA-Z0-9]*"
+ :doc-spec '(("(perl5)Function Index"
+ (lambda (item)
+ (if (string-match "^\\([a-zA-Z0-9]+\\)" item)
+ (match-string 1 item)))
+ "^" "\\b")
+ ("(perl5)Variable Index"
+ (lambda (item)
+ ;; Work around bad formatted array variables.
+ (let ((sym (cond ((or (string-match "^\\$\\(.\\|@@\\)$" item)
+ (string-match "^\\$\\^[A-Z]$" item))
+ item)
+ ((string-match
+ "^\\([$%@]\\|@@\\)?[_a-zA-Z0-9]+" item)
+ (match-string 0 item))
+ (t ""))))
+ (if (string-match "@@" sym)
+ (setq sym (concat (substring sym 0 (match-beginning 0))
+ (substring sym (1- (match-end 0))))))
+ (if (string-equal sym "") nil sym)))
+ "^" "\\b"))
+ :parse-rule "[$@%]?\\([_a-zA-Z0-9]+\\|[^a-zA-Z]\\)")
+
+(info-lookup-maybe-add-help
+ :mode 'latex-mode
+ :regexp "\\\\\\([a-zA-Z]+\\|[^a-zA-Z]\\)"
+ :doc-spec '(("(latex2e)Command Index" nil
+ "`" "\\({[^}]*}\\)?'")))
+
+(info-lookup-maybe-add-help
+ :mode 'scheme-mode
+ :regexp ;; "\\(\\sw\\|\\s_\\)+"
+ "[^()' \t\n]+"
+ :ignore-case t
+ ;; Aubrey Jaffer's rendition from <URL:ftp://ftp-swiss.ai.mit.edu/pub/scm>
+ :doc-spec '(("(r5rs)Index")))
+
+(info-lookup-maybe-add-help
+ :mode 'emacs-lisp-mode
+ :regexp "[^()' \t\n]+"
+ :doc-spec '(("(emacs)Command Index")
+ ("(emacs)Variable Index")
+ ("(elisp)Index"
+ (lambda (item)
+ (let ((sym (intern-soft item)))
+ (cond ((null sym)
+ (if (string-equal item "nil") item))
+ ((or (boundp sym) (fboundp sym))
+ item))))
+ "^[ \t]+- [^:]+:[ \t]*" "\\b")))
+
+(info-lookup-maybe-add-help
+ :mode 'lisp-interaction-mode
+ :regexp "[^()' \t\n]+"
+ :parse-rule 'ignore
+ :other-modes '(emacs-lisp-mode))
+
+(info-lookup-maybe-add-help
+ :mode 'lisp-mode
+ :regexp "[^()' \t\n]+"
+ :parse-rule 'ignore
+ :other-modes '(emacs-lisp-mode))
+
+(info-lookup-maybe-add-help
+ :mode 'scheme-mode
+ :regexp "[^()' \t\n]+"
+ :ignore-case t
+ :doc-spec '(("(r5rs)Index" nil
+ "^[ \t]+- [^:]+:[ \t]*" "\\b")))
+
+\f
+(provide 'info-look)
+
+;;; info-look.el ends here
projects / gnuplot / blobdiff