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- ;;!emacs
- ;;
- ;; FILE: br-info.el
- ;; SUMMARY: Support routines for Info file hierarchy browsing.
- ;; USAGE: GNU Emacs Lisp Library
- ;; KEYWORDS: docs, help, hypermedia
- ;;
- ;; AUTHOR: Bob Weiner
- ;; ORG: Motorola Inc.
- ;;
- ;; ORIG-DATE: 7-Dec-89
- ;; LAST-MOD: 17-Apr-95 at 17:35:32 by Bob Weiner
- ;;
- ;; Copyright (C) 1989-1995 Free Software Foundation, Inc.
- ;; See the file BR-COPY for license information.
- ;;
- ;; This file is part of the OO-Browser.
- ;;
- ;; DESCRIPTION:
- ;;
- ;; See 'info-class-def-regexp' for regular expression that matches class
- ;; definitions.
- ;;
- ;; DESCRIP-END.
-
- ;;; ************************************************************************
- ;;; Other required Elisp libraries
- ;;; ************************************************************************
-
- (require 'br-lib)
-
- ;;; ************************************************************************
- ;;; User visible variables
- ;;; ************************************************************************
-
- (defvar info-lib-search-dirs nil
- "List of directories below which Info Library source files are found.
- Subdirectories of Library source are also searched. A Library is a stable
- group of classes.")
-
- (defvar info-sys-search-dirs nil
- "List of directories below which Info System source files are found.
- Subdirectories of System source are also searched. A System class is one
- that is not yet reusable and is likely to change before release.")
-
- (defconst info-narrow-view-to-class t
- "*Non-nil means narrow buffer to just the matching class definition when displayed.")
-
- ;;; ************************************************************************
- ;;; Internal functions
- ;;; ************************************************************************
-
- (defun info-find-nd (filename node edit)
- "Show (FILENAME)NODE in current window.
- If EDIT is non-nil, NODE is made editable."
- (if (string-match "-[1-9][0-9]*$" filename)
- (setq filename (substring filename 0 (match-beginning 0))) )
- (Info-find-node filename node t)
- (if edit (let ((Info-enable-edit t))
- (Info-edit))))
-
- (defun info-get-classes-from-source (filename &rest ignore)
- "Scans FILENAME and returns cons of class list with parents-class alist.
- Handles multiple inheritance. Assumes file existence and readability have
- already been checked."
- (let ((no-kill (get-file-buffer filename))
- classes class parents parent-cons)
- (if no-kill
- (set-buffer no-kill)
- (funcall br-view-file-function filename))
- (save-restriction
- (save-excursion
- (widen)
- (goto-char (point-min))
- (while (re-search-forward info-class-def-regexp nil t)
- (setq class (buffer-substring (match-beginning 1) (match-end 1))
- parent-cons
- (cons
- (if (looking-at info-parent-regexp)
- (list (buffer-substring
- (match-beginning 1)
- (match-end 1))))
- class)
- classes (cons class classes)
- parents (cons parent-cons parents)))))
- (or no-kill (kill-buffer (current-buffer)))
- (cons classes (delq nil parents))))
-
- (defun info-get-parents-from-source (filename class-name)
- "Scan source in FILENAME and return list of parents of CLASS-NAME.
- Assume file existence has already been checked."
- (or (null class-name)
- (let ((br-view-file-function 'br-insert-file-contents))
- (car (car (br-rassoc
- class-name
- (cdr (info-get-classes-from-source filename))))))))
-
- (defun info-select-path (paths-htable-elt &optional feature-p)
- "Select proper pathname from PATHS-HTABLE-ELT based upon value of optional FEATURE-P.
- Selection is between path of class definition and path for features associated
- with the class."
- (cdr paths-htable-elt))
-
- (defun info-set-case (type)
- "Return string TYPE identifier for use as a class name."
- type)
-
- (defun info-set-case-type (class-name)
- "Return string CLASS-NAME for use as a type identifier."
- class-name)
-
- (defun info-to-class-end ()
- "Assuming point is at start of node, move to start of line after end of node."
- (interactive)
- (skip-chars-forward " \t\n")
- (if (re-search-forward "[]" nil t)
- (beginning-of-line)
- (goto-char (point-max))))
-
- (defun info-to-comments-begin ()
- "Skip back from current point past any preceding Info comments."
- (skip-chars-forward " \t\n"))
-
- ;;; ************************************************************************
- ;;; Internal variables
- ;;; ************************************************************************
-
- (defconst info-class-name-before
- "?[\n][\n\t ]*.*Node:[ \t]+"
- "Regexp preceding the class name in a class definition.")
-
- (defconst info-identifier-chars "-_()a-zA-Z0-9 "
- "String of chars and char ranges that may be used within an Info identifier.")
-
- (defconst info-identifier (concat "\\([a-zA-Z0-9()][" info-identifier-chars "]*\\)")
- "Regular expression matching an Info identifier.")
-
- (defconst info-class-name-after
- "[\t,\n]+"
- "Regexp following the class name in a class definition.")
-
- (defconst info-class-def-regexp
- (concat info-class-name-before info-identifier info-class-name-after)
- "Regular expression used to match to class definitions in source text.
- Class name identifier is grouped expression 1.")
-
- (defconst info-parent-regexp
- (concat ".*Up:[ \t]+" info-identifier)
- "Regular expression whose grouping number 1 matches Info parent identifier.")
-
- (defconst info-lang-prefix "info-"
- "Prefix string that starts \"br-info.el\" symbol names.")
-
- (defconst info-file-dir-regexp "^[^.~#].*[^.~#]$"
- "Regexp that ignores extraneous non-source files and directories.")
-
- (defconst info-src-file-regexp ".$"
- "Regular expression matching a unique part of Info source.")
-
- (defvar info-children-htable nil
- "Htable whose elements are of the form: (LIST-OF-CHILD-CLASSES . CLASS-NAME).
- Used to traverse Info inheritance graph. 'br-build-children-htable' builds
- this list.")
- (defvar info-parents-htable nil
- "Htable whose elements are of the form: (LIST-OF-PARENT-CLASSES . CLASS-NAME).
- Used to traverse Info inheritance graph. 'br-build-parents-htable' builds
- this list.")
- (defvar info-paths-htable nil
- "Htable whose elements are of the form: (LIST-OF-CLASS-NAMES . FILE-PATH).
- FILE-PATH gives the location of classes found in LIST-OF-CLASS-NAMES.
- 'br-build-paths-htable' builds this list.")
-
-
- (defvar info-lib-parents-htable nil
- "Htable whose elements are of the form: (LIST-OF-PARENT-CLASSES . CLASS-NAME).
- Only classes from stable software libraries are used to build the list.")
- (defvar info-lib-paths-htable nil
- "Htable whose elements are of the form: (LIST-OF-CLASS-NAMES . FILE-PATH).
- FILE-PATH gives the location of classes found in LIST-OF-CLASS-NAMES.
- Only classes from stable software libraries are used to build the list.")
-
- (defvar info-sys-parents-htable nil
- "Htable whose elements are of the form: (LIST-OF-PARENT-CLASSES . CLASS-NAME).
- Only classes from systems that are likely to change are used to build the list.")
- (defvar info-sys-paths-htable nil
- "Alist whose elements are of the form: (LIST-OF-CLASS-NAMES . FILE-PATH).
- FILE-PATH gives the location of classes found in LIST-OF-CLASS-NAMES.
- Only classes from systems that are likely to change are used to build the
- list.")
-
- (defvar info-lib-prev-search-dirs nil
- "Used to check if 'info-lib-classes-htable' must be regenerated.")
- (defvar info-sys-prev-search-dirs nil
- "Used to check if 'info-sys-classes-htable' must be regenerated.")
-
- (defvar info-env-spec nil
- "Non-nil value means Environment specification has been given but not yet built.
- Nil means current Environment has been built, though it may still require updating.")
-
- (provide 'br-info)
-