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* info.el (Info-directory-list): Doc fix; it is set according to

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INFOPATH, not INFODIR.
	(Info-find-node): Don't try to set the info buffer's directory
	according to Info-directory; that variable doesn't exist any more.
	Instead, let Info-insert-dir set the current directory.
	(Info-insert-dir): Properly check for upper- and lower-case forms
	of "dir", with and without ".info" extension.  Set the buffer's
	default-directory to the directory containing the first dir file
	we find, and cache it in Info-dir-contents-directory.
	(Info-dir-contents-directory): New variable, to cache the
	directory we decided to use as the merged directory's
	default-directory.
This commit is contained in:
Jim Blandy 1993-03-02 07:27:17 +00:00
parent b9a4b5011e
commit 44c327f959
1 changed files with 48 additions and 20 deletions
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68
lisp/info.el
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@ -50,8 +50,8 @@ in paths.el.")
(defvar Info-directory-list nil
"List of directories to search for Info documentation files.
nil means not yet initialized. In this case, Info uses the environment
variable INFODIR to initialize it, or `Info-default-directory-list'
if there is no INFODIR variable in the environment.")
variable INFOPATH to initialize it, or `Info-default-directory-list'
if there is no INFOPATH variable in the environment.")
(defvar Info-current-file nil
"Info file that Info is now looking at, or nil.")
@ -153,7 +153,6 @@ to read a file name from the minibuffer."
Info-current-subfile nil
buffer-file-name nil)
(erase-buffer)
(setq default-directory Info-directory)
(if (eq filename t)
(Info-insert-dir)
(insert-file-contents filename t)
@ -232,35 +231,63 @@ to read a file name from the minibuffer."
(goto-char (nth 2 hist)))))
(goto-char (point-min)))
;; Record the contents of the (virtual) dir file,
;; once we have merged it for the first time,
;; so we can save time subsequently.
;; Cache the contents of the (virtual) dir file, once we have merged
;; it for the first time, so we can save time subsequently.
(defvar Info-dir-contents nil)
;; Cache for the directory we decided to use for the default-directory
;; of the merged dir text.
(defvar Info-dir-contents-directory nil)
;; Construct the Info directory node by merging the files named `dir'
;; from various directories.
;; from various directories. Set the *info* buffer's
;; default-directory to the first directory we actually get any text
;; from.
(defun Info-insert-dir ()
(if Info-dir-contents
(insert Info-dir-contents)
(let ((dirs Info-directory-list)
buffers buffer others nodes)
;; Search the directory list for file FILENAME.
;; Search the directory list for the directory file.
(while dirs
(setq temp (expand-file-name "dir" (car dirs)))
;; Try several variants of specified name.
;; Try downcasing, appending `.info', or both.
(cond ((file-exists-p temp)
(setq buffers (cons (find-file-noselect temp) buffers)))
((file-exists-p (concat temp ".info"))
(setq buffers (cons (find-file-noselect (concat temp ".info"))
buffers))))
(setq dirs (cdr dirs)))
;; Distinguish the dir file that comes with Emacs
;; from all the others.
;; Try upcasing, appending `.info', or both.
(let (temp
(buffer
(cond
((progn (setq temp (expand-file-name "DIR" (car dirs)))
(file-exists-p temp))
(find-file-noselect temp))
((progn (setq temp (expand-file-name "dir" (car dirs)))
(file-exists-p temp))
(find-file-noselect temp))
((progn (setq temp (expand-file-name "DIR.INFO" (car dirs)))
(file-exists-p temp))
(find-file-noselect temp))
((progn (setq temp (expand-file-name "dir.info" (car dirs)))
(file-exists-p temp))
(find-file-noselect temp)))))
(if buffer (setq buffers (cons buffer buffers)))
(setq dirs (cdr dirs))))
;; Distinguish the dir file that comes with Emacs from all the
;; others. [This sounds like baloney - who knows what order
;; Info-directory-list is in, especially after checking the
;; INFOPATH variable, and why should Emacs's dir be special? If
;; you understand what this comment should have said, please
;; change it.]
(setq buffer (car buffers)
others (cdr buffers))
;; Insert the entire original dir file as a start.
;; Insert the entire original dir file as a start; use its
;; default directory as the default directory for the whole
;; concatenation.
(insert-buffer buffer)
(setq Info-dir-contents-directory (save-excursion
(set-buffer buffer)
default-directory))
;; Look at each of the other buffers one by one.
(while others
(let ((other (car others)))
@ -322,7 +349,8 @@ to read a file name from the minibuffer."
(while buffers
(kill-buffer (car buffers))
(setq buffers (cdr buffers))))
(setq Info-dir-contents (buffer-string))))
(setq Info-dir-contents (buffer-string)))
(setq default-directory Info-dir-contents-directory))
(defun Info-read-subfile (nodepos)
(set-buffer (marker-buffer Info-tag-table-marker))