--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/oobr/br-smt.el	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,197 @@
+;;!emacs
+;;
+;; FILE:         br-smt.el
+;; SUMMARY:      Support routines for Smalltalk inheritance browsing and error parsing.
+;; USAGE:        GNU Emacs Lisp Library
+;; KEYWORDS:     oop, tools
+;;
+;; AUTHOR:       Bob Weiner
+;; ORG:          Motorola Inc.
+;;
+;; ORIG-DATE:    26-Jul-90
+;; LAST-MOD:     21-Sep-95 at 12:31:20 by Bob Weiner
+;;
+;; Copyright (C) 1990-1995  Free Software Foundation, Inc.
+;; See the file BR-COPY for license information.
+;;
+;; This file is part of the OO-Browser.
+;;
+;; DESCRIPTION:  
+;;
+;;   See 'smt-class-def-regexp' for regular expression that matches class
+;;   definitions.
+;;            
+;; DESCRIP-END.
+
+;;; ************************************************************************
+;;; Other required Elisp libraries
+;;; ************************************************************************
+
+(require 'br-lib)
+
+;;; ************************************************************************
+;;; User visible variables
+;;; ************************************************************************
+
+(defvar smt-lib-search-dirs nil
+  "List of directories below which Smalltalk Library source files are found.
+Subdirectories of Library source are also searched.  A Library is a stable
+group of classes.")
+
+(defvar smt-sys-search-dirs nil
+  "List of directories below which Smalltalk 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 smt-narrow-view-to-class nil
+ "*Non-nil means narrow buffer to just the matching class definition when displayed.")
+
+;;; ************************************************************************
+;;; Internal functions
+;;; ************************************************************************
+
+(defun smt-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 smt-class-def-regexp nil t)
+	  (setq class (buffer-substring (match-beginning 3) (match-end 3))
+		parent-cons
+		(cons
+		 (and (match-end 1) (> (match-end 1) 0)
+		      (list (buffer-substring
+			     (match-beginning 1)
+			     (match-end 1))))
+		 class))
+	  ;; Assume class name not found within a comment.
+	  (setq classes (cons class classes)
+		parents (cons parent-cons parents)))))
+    (or no-kill (kill-buffer (current-buffer)))
+    (cons classes (delq nil parents))))
+
+(defun smt-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)
+	(car (car (br-rassoc
+		   class-name
+		   (cdr (smt-get-classes-from-source filename)))))))
+
+(defun smt-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 smt-set-case (type)
+  "Return string TYPE identifier for use as a class name."
+  type)
+
+(defun smt-set-case-type (class-name)
+  "Return string CLASS-NAME for use as a type identifier."
+  class-name)
+
+(defun smt-to-class-end ()
+  "Assuming point is at start of class, move to best guess start of line after end of class."
+  (interactive)
+  (goto-char (point-max)))
+
+(defun smt-to-comments-begin ()
+  "Skip back from current point past any preceding Smalltalk comments.
+Presently a no-op."
+  )
+
+;;; ************************************************************************
+;;; Internal variables
+;;; ************************************************************************
+
+(defconst smt-type-tag-separator "@"
+  "String that separates a tag's type from its normalized definition form.
+This should be a single character which is unchanged when quoted for use as a
+literal in a regular expression.")
+
+(defconst smt-subclass-separator
+  "\\(variableSubclass:\\|variableWordSubclass:\\|variableByteSubclass:\\|subclass:\\)"
+  "Regexp matching delimiter following parent identifier.")
+
+(defconst smt-identifier-chars "a-zA-Z0-9"
+  "String of chars and char ranges that may be used within a Smalltalk identifier.")
+
+(defconst smt-identifier (concat "\\([a-zA-Z][" smt-identifier-chars "]*\\)")
+  "Regular expression matching a Smalltalk identifier.")
+
+
+(defconst smt-class-name-before
+  (concat "^[ \t]*" smt-identifier
+	  "[ \t\n]+" smt-subclass-separator
+	  "[ \t\n]*#")
+  "Regexp preceding the class name in a class definition.")
+
+(defconst smt-class-name-after
+  ""
+  "Regexp following the class name in a class definition.")
+
+(defconst smt-class-def-regexp
+  (concat smt-class-name-before smt-identifier smt-class-name-after)
+  "Regular expression used to match to class definitions in source text.
+Class name identifier is grouped expression 3.  'subclass:' inheritance
+indicator is grouped expression 2.  Parent identifier is grouped
+expression 1.")
+
+
+(defconst smt-lang-prefix "smt-"
+ "Prefix string that starts \"br-smt.el\" symbol names.")
+
+(defconst smt-src-file-regexp ".\\.st$"
+  "Regular expression matching a unique part of Smalltalk source file name and no others.")
+
+(defvar smt-children-htable nil
+  "Htable whose elements are of the form: (LIST-OF-CHILD-CLASSES . CLASS-NAME).
+Used to traverse Smalltalk inheritance graph.  'br-build-children-htable' builds
+this list.")
+(defvar smt-parents-htable nil
+  "Htable whose elements are of the form: (LIST-OF-PARENT-CLASSES . CLASS-NAME).
+Used to traverse Smalltalk inheritance graph.  'br-build-parents-htable' builds
+this list.")
+(defvar smt-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 smt-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 smt-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 smt-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 smt-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 smt-lib-prev-search-dirs nil
+  "Used to check if 'smt-lib-classes-htable' must be regenerated.")
+(defvar smt-sys-prev-search-dirs nil
+  "Used to check if 'smt-sys-classes-htable' must be regenerated.")
+
+(defvar smt-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-smt)