From db9fe8fc2a5dabdc2eec27b98462cc577979daa8 Mon Sep 17 00:00:00 2001 From: John Foerch Date: Sat, 19 Dec 2009 18:52:13 -0500 Subject: [PATCH 1/1] initial checkin --- visible-mark.el | 145 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 visible-mark.el diff --git a/visible-mark.el b/visible-mark.el new file mode 100644 index 0000000..1b6c552 --- /dev/null +++ b/visible-mark.el @@ -0,0 +1,145 @@ +;;; visible-mark.el --- Make marks visible. + +;;; Commentary: + +;; This was hacked together by Jorgen Schäfer +;; And hacked again by Yann Hodique +;; Donated to the public domain. Use at your own risk. + +;;; History: +;; 2008-02-21 MATSUYAMA Tomohiro +;; +;; * visible-mark.el: Added function to inhibit trailing overlay. +;; +;; 2008-01-31 MATSUYAMA Tomohiro +;; +;; * visible-mark.el: Create formal emacs lisp file from +;; http://www.emacswiki.org/cgi-bin/wiki/VisibleMark. +;; Yann Hodique and Jorgen Schäfer are original authors. +;; Added function to make multiple marks visible. +;; + +;;; Code: + +(eval-when-compile + (require 'cl)) + +(defgroup visible-mark nil + "Show the position of your mark." + :group 'convenience + :prefix "visible-mark-") + +(defface visible-mark-face + `((((type tty) (class color)) + (:background "gray" :foreground "white")) + (((type tty) (class mono)) + (:inverse-video t)) + (((class color) (background dark)) + (:background "gray")) + (((class color) (background light)) + (:background "grey80")) + (t (:background "gray"))) + "Face for the mark." + :group 'visible-mark) + +(defvar visible-mark-overlays nil + "The overlays used in this buffer.") +(make-variable-buffer-local 'visible-mark-overlays) + +(defvar visible-mark-non-trailing-faces nil) + +(defcustom visible-mark-inhibit-trailing-overlay t + "If non-nil, inhibit trailing overlay with underline face." + :group 'visible-mark + :type 'boolean) + +(defcustom visible-mark-max 1 + "A number of mark to be visible." + :group 'visible-mark + :type 'integer) + +(defcustom visible-mark-faces nil + "A list of mark faces." + :group 'visible-mark + :type '(repeat face)) + +(defcustom global-visible-mark-mode-exclude-alist nil + "A list of buffer names to be excluded" + :group 'visible-mark + :type '(repeat regexp)) + +(defun visible-mark-initialize-faces () + (if (and visible-mark-inhibit-trailing-overlay + (null visible-mark-non-trailing-faces)) + (let (faces) + (dotimes (i visible-mark-max) + (let ((face (or (nth i visible-mark-faces) 'visible-mark-face)) + (symbol (intern (format "visible-mark-non-trailing-face%s" i)))) + (copy-face face symbol) + (set-face-attribute symbol nil + :foreground (or (face-attribute face :background) t) + :background 'unspecified + :underline t) + (push symbol faces))) + (setq visible-mark-non-trailing-faces (nreverse faces))))) + +(defun visible-mark-initialize-overlays () + (mapcar 'delete-overlay visible-mark-overlays) + (let (overlays) + (dotimes (i visible-mark-max) + (let ((overlay (make-overlay (point-min) (point-min)))) + (push overlay overlays))) + (setq visible-mark-overlays (nreverse overlays)))) + +(defun visible-mark-move-overlays () + "Move the overlay in `visible-mark-overlay' to a new position." + (let ((marks (cons (mark-marker) mark-ring)) + (overlays visible-mark-overlays)) + (dotimes (i visible-mark-max) + (let* ((mark (car-safe marks)) + (overlay (car overlays)) + (pos (and mark (marker-position mark)))) + (when pos + (overlay-put overlay 'face + (if (and visible-mark-inhibit-trailing-overlay + (save-excursion + (goto-char pos) + (eolp))) + (nth i visible-mark-non-trailing-faces) + (or (nth i visible-mark-faces) 'visible-mark-face))) + (move-overlay overlay pos (1+ pos))) + (setq marks (cdr marks))) + (setq overlays (cdr overlays))))) + +(require 'easy-mmode) + +(defun visible-mark-mode-maybe () + (when (cond + ((minibufferp (current-buffer)) nil) + ((flet ((fun (arg) + (if (null arg) nil + (or (string-match (car arg) (buffer-name)) + (fun (cdr arg)))))) + (fun global-visible-mark-mode-exclude-alist)) nil) + (t t)) + (visible-mark-mode))) + +(define-minor-mode visible-mark-mode + "A mode to make the mark visible." + nil nil nil + :group 'visible-mark + (if visible-mark-mode + (progn + (visible-mark-initialize-faces) + (visible-mark-initialize-overlays) + (add-hook 'post-command-hook 'visible-mark-move-overlays nil t)) + (mapcar 'delete-overlay visible-mark-overlays) + (setq visible-mark-overlays nil) + (remove-hook 'post-command-hook 'visible-mark-move-overlays t))) + +(define-global-minor-mode + global-visible-mark-mode visible-mark-mode visible-mark-mode-maybe + :group 'visible-mark) + +(provide 'visible-mark) +;;; visible-mark.el ends here -- 2.30.2