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Add a shadow-mode for load-path shadows.

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* lisp/emacs-lisp/shadow.el (shadow-font-lock-keywords): New variable.
(shadow-mode): New mode.
(shadow-find-file): New button.
(list-load-path-shadows): Use shadow-mode and buttons.
This commit is contained in:
Glenn Morris 2010-10-06 19:37:39 -07:00
parent 52da218259
commit 7b9235ad95
2 changed files with 46 additions and 8 deletions
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49
lisp/emacs-lisp/shadow.el
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@ -151,6 +151,34 @@ See the documentation for `list-load-path-shadows' for further information."
(and (= (nth 7 (file-attributes f1))
(nth 7 (file-attributes f2)))
(eq 0 (call-process "cmp" nil nil nil "-s" f1 f2))))))))
(defvar shadow-font-lock-keywords
`((,(format "hides \\(%s.*\\)"
(file-name-directory (locate-library "simple.el")))
. (1 font-lock-warning-face)))
"Keywords to highlight in `shadow-mode'.")
(define-derived-mode shadow-mode fundamental-mode "Shadow"
"Major mode for load-path shadows buffer."
(set (make-local-variable 'font-lock-defaults)
'((shadow-font-lock-keywords)))
(setq buffer-undo-list t
buffer-read-only t))
;; TODO use text-properties instead, a la dired.
(require 'button)
(define-button-type 'shadow-find-file
'follow-link t
;; 'face 'default
'action (lambda (button)
(let ((file (concat (button-get button 'shadow-file) ".el")))
(or (file-exists-p file)
(setq file (concat file ".gz")))
(if (file-readable-p file)
(pop-to-buffer (find-file-noselect file))
(error "Cannot read file"))))
'help-echo "mouse-2, RET: find this file")
;;;###autoload
(defun list-load-path-shadows (&optional stringp)
@ -234,14 +262,20 @@ function, `find-emacs-lisp-shadows'."
;; Create the *Shadows* buffer and display shadowings there.
(let ((string (buffer-string)))
(with-current-buffer (get-buffer-create "*Shadows*")
(fundamental-mode) ;run after-change-major-mode-hook.
(display-buffer (current-buffer))
(setq buffer-undo-list t
buffer-read-only nil)
(erase-buffer)
(insert string)
(insert msg "\n")
(setq buffer-read-only t)))
(shadow-mode) ; run after-change-major-mode-hook
(let ((inhibit-read-only t))
(erase-buffer)
(insert string)
(insert msg "\n")
(while (re-search-backward "\\(^.*\\) hides \\(.*$\\)"
nil t)
(dotimes (i 2)
(make-button (match-beginning (1+ i))
(match-end (1+ i))
'type 'shadow-find-file 'shadow-file
(match-string (1+ i)))))
(goto-char (point-max)))))
;; We are non-interactive, print shadows via message.
(unless (zerop n)
(message "This site has duplicate Lisp libraries with the same name.
@ -259,5 +293,4 @@ version unless you know what you are doing.\n")
(provide 'shadow)
;; arch-tag: 0480e8a7-62ed-4a12-a9f6-f44ded9b0830
;;; shadow.el ends here