X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/83f86594323432ccf6cdcbe98e792d7461fbf337..16f45d1b8d556362a0668f192e4453f126946b1c:/lisp/help.el

diff --git a/lisp/help.el b/lisp/help.el
index a0e195b343..97887b1c81 100644
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -91,22 +91,22 @@
 (define-key help-map "q" 'help-quit)
 
 (defvar help-font-lock-keywords
-  (let ((name-char "[-+a-zA-Z0-9_*]") (sym-char "[-+a-zA-Z0-9_:*]"))
-    (list
-     ;;
-     ;; The symbol itself.
-     (list (concat "\\`\\(" name-char "+\\)\\(:\\)?")
-	   '(1 (if (match-beginning 2)
-		   font-lock-function-name-face
-		 font-lock-variable-name-face)
-	       nil t))
-     ;;
-     ;; Words inside `' which tend to be symbol names.
-     (list (concat "`\\(" sym-char sym-char "+\\)'")
-	   1 'font-lock-reference-face t)
-     ;;
-     ;; CLisp `:' keywords as references.
-     (list (concat "\\<:" sym-char "+\\>") 0 'font-lock-reference-face t)))
+  (eval-when-compile
+    (let ((name-char "[-+a-zA-Z0-9_*]") (sym-char "[-+a-zA-Z0-9_:*]"))
+      (list
+       ;;
+       ;; The symbol itself.
+       (list (concat "\\`\\(" name-char "+\\)\\(\\(:\\)\\|\\('\\)\\)")
+	     '(1 (if (match-beginning 3)
+		     font-lock-function-name-face
+		   font-lock-variable-name-face)))
+       ;;
+       ;; Words inside `' which tend to be symbol names.
+       (list (concat "`\\(" sym-char sym-char "+\\)'")
+	     1 'font-lock-reference-face t)
+       ;;
+       ;; CLisp `:' keywords as references.
+       (list (concat "\\<:" sym-char "+\\>") 0 'font-lock-reference-face t))))
   "Default expressions to highlight in Help mode.")
 
 (defun help-mode ()
@@ -666,12 +666,15 @@ Argument is a command definition, usually a symbol with a function definition."
       (message "%s is not on any key" definition)))
   nil)
 
-(defun locate-library (library &optional nosuffix)
-  "Show the full path name of Emacs library LIBRARY.
+(defun locate-library (library &optional nosuffix path)
+  "Show the precise file name of Emacs library LIBRARY.
 This command searches the directories in `load-path' like `M-x load-library'
 to find the file that `M-x load-library RET LIBRARY RET' would load.
 Optional second arg NOSUFFIX non-nil means don't add suffixes `.elc' or `.el'
-to the specified name LIBRARY (a la calling `load' instead of `load-library')."
+to the specified name LIBRARY.
+
+If the optional third arg PATH is specified, that list of directories
+is used instead of `load-path'."
   (interactive "sLocate library: ")
   (catch 'answer
     (mapcar
@@ -684,8 +687,22 @@ to the specified name LIBRARY (a la calling `load' instead of `load-library')."
 		   (progn
 		     (message "Library is file %s" try)
 		     (throw 'answer try)))))
-	 (if nosuffix '("") '(".elc" ".el" ""))))
-     load-path)
+	 (if nosuffix
+	     '("")
+	   (let ((basic '(".elc" ".el" ""))
+		 (compressed '(".Z" ".gz" "")))
+	     ;; If autocompression mode is on,
+	     ;; consider all combinations of library suffixes
+	     ;; and compression suffixes.
+	     (if (rassq 'jka-compr-handler file-name-handler-alist)
+		 (apply 'nconc
+			(mapcar '(lambda (compelt)
+				   (mapcar '(lambda (baselt)
+					      (concat baselt compelt))
+					   basic))
+				compressed))
+	       basic)))))
+     (or path load-path))
     (message "No library %s in search path" library)
     nil))