-;;; linum.el --- display line numbers in the left margin
-
-;; Copyright (C) 2008 Free Software Foundation, Inc.
-
-;; Author: Markus Triska <markus.triska@gmx.at>
-;; Maintainer: FSF
-;; Keywords: convenience
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software: you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation, either version 3 of the License, or
-;; (at your option) any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
-
-;;; Commentary:
-
-;; Display line numbers for the current buffer.
-;;
-;; Toggle display of line numbers with M-x linum-mode. To enable
-;; line numbering in all buffers, use M-x global-linum-mode.
-
-;;; Code:
-
-(defconst linum-version "0.9wz")
-
-(defvar linum-overlays nil "Overlays used in this buffer.")
-(defvar linum-available nil "Overlays available for reuse.")
-(defvar linum-before-numbering-hook nil
- "Functions run in each buffer before line numbering starts.")
-
-(mapc #'make-variable-buffer-local '(linum-overlays linum-available))
-
-(defgroup linum nil
- "Show line numbers in the left margin."
- :group 'convenience)
-
-;;;###autoload
-(defcustom linum-format 'dynamic
- "Format used to display line numbers.
-Either a format string like \"%7d\", `dynamic' to adapt the width
-as needed, or a function that is called with a line number as its
-argument and should evaluate to a string to be shown on that line.
-See also `linum-before-numbering-hook'."
- :group 'linum
- :type 'sexp)
-
-(defface linum
- '((t :inherit (shadow default)))
- "Face for displaying line numbers in the display margin."
- :group 'linum)
-
-(defcustom linum-eager t
- "Whether line numbers should be updated after each command.
-The conservative setting `nil' might miss some buffer changes,
-and you have to scroll or press \\[recenter-top-bottom] to update the numbers."
- :group 'linum
- :type 'boolean)
-
-(defcustom linum-delay nil
- "Delay updates to give Emacs a chance for other changes."
- :group 'linum
- :type 'boolean)
-
-;;;###autoload
-(define-minor-mode linum-mode
- "Toggle display of line numbers in the left margin."
- :lighter "" ; for desktop.el
- (if linum-mode
- (progn
- (if linum-eager
- (add-hook 'post-command-hook (if linum-delay
- 'linum-schedule
- 'linum-update-current) nil t)
- (add-hook 'after-change-functions 'linum-after-change nil t))
- (add-hook 'window-scroll-functions 'linum-after-scroll nil t)
- ;; mistake in Emacs: window-size-change-functions cannot be local
- (add-hook 'window-size-change-functions 'linum-after-size)
- (add-hook 'change-major-mode-hook 'linum-delete-overlays nil t)
- (add-hook 'window-configuration-change-hook
- 'linum-after-config nil t)
- (linum-update-current))
- (remove-hook 'post-command-hook 'linum-update-current t)
- (remove-hook 'post-command-hook 'linum-schedule t)
- (remove-hook 'window-size-change-functions 'linum-after-size)
- (remove-hook 'window-scroll-functions 'linum-after-scroll t)
- (remove-hook 'after-change-functions 'linum-after-change t)
- (remove-hook 'window-configuration-change-hook 'linum-after-config t)
- (remove-hook 'change-major-mode-hook 'linum-delete-overlays t)
- (linum-delete-overlays)))
-
-;;;###autoload
-(define-globalized-minor-mode global-linum-mode linum-mode linum-on)
-
-(defun linum-on ()
- (unless (minibufferp)
- (linum-mode 1)))
-
-(defun linum-delete-overlays ()
- "Delete all overlays displaying line numbers for this buffer."
- (mapc #'delete-overlay linum-overlays)
- (setq linum-overlays nil)
- (dolist (w (get-buffer-window-list (current-buffer) nil t))
- (set-window-margins w 0)))
-
-(defun linum-update-current ()
- "Update line numbers for the current buffer."
- (linum-update (current-buffer)))
-
-(defun linum-update (buffer)
- "Update line numbers for all windows displaying BUFFER."
- (with-current-buffer buffer
- (when linum-mode
- (setq linum-available linum-overlays)
- (setq linum-overlays nil)
- (save-excursion
- (mapc #'linum-update-window
- (get-buffer-window-list buffer nil 'visible)))
- (mapc #'delete-overlay linum-available)
- (setq linum-available nil))))
-
-(defun linum-update-window (win)
- "Update line numbers for the portion visible in window WIN."
- (goto-char (window-start win))
- (let ((line (line-number-at-pos))
- (limit (window-end win t))
- (fmt (cond ((stringp linum-format) linum-format)
- ((eq linum-format 'dynamic)
- (let ((w (length (number-to-string
- (count-lines (point-min) (point-max))))))
- (concat "%" (number-to-string w) "d")))))
- (width 0))
- (run-hooks 'linum-before-numbering-hook)
- ;; Create an overlay (or reuse an existing one) for each
- ;; line visible in this window, if necessary.
- (while (and (not (eobp)) (<= (point) limit))
- (let* ((str (if fmt
- (propertize (format fmt line) 'face 'linum)
- (funcall linum-format line)))
- (visited (catch 'visited
- (dolist (o (overlays-in (point) (point)))
- (when (string= (overlay-get o 'linum-str) str)
- (unless (memq o linum-overlays)
- (push o linum-overlays))
- (setq linum-available (delete o linum-available))
- (throw 'visited t))))))
- (setq width (max width (length str)))
- (unless visited
- (let (ov)
- (if (null linum-available)
- (setq ov (make-overlay (point) (point)))
- (setq ov (pop linum-available))
- (move-overlay ov (point) (point)))
- (push ov linum-overlays)
- (overlay-put ov 'before-string
- (propertize " " 'display `((margin left-margin) ,str)))
- (overlay-put ov 'linum-str str))))
- (forward-line)
- (setq line (1+ line)))
- (set-window-margins win width)))
-
-(defun linum-after-change (beg end len)
- ;; update overlays on deletions, and after newlines are inserted
- (when (or (= beg end)
- (= end (point-max))
- (string-match-p "\n" (buffer-substring-no-properties beg end)))
- (linum-update-current)))
-
-(defun linum-after-scroll (win start)
- (linum-update (window-buffer win)))
-
-(defun linum-after-size (frame)
- (linum-after-config))
-
-(defun linum-schedule ()
- ;; schedule an update; the delay gives Emacs a chance for display changes
- (run-with-idle-timer 0 nil #'linum-update-current))
-
-(defun linum-after-config ()
- (walk-windows (lambda (w) (linum-update (window-buffer w))) nil 'visible))
-
-(defun linum-unload-function ()
- "Unload the Linum library."
- (global-linum-mode -1)
- ;; continue standard unloading
- nil)
-
-(provide 'linum)
-
-;; arch-tag: dea45631-ed3c-4867-8b49-1c41c80aec6a
-;;; linum.el ends here
+;;; linum.el --- display line numbers in the left margin\r
+\r
+;; Copyright (C) 2008 Free Software Foundation, Inc.\r
+\r
+;; Author: Markus Triska <markus.triska@gmx.at>\r
+;; Maintainer: FSF\r
+;; Keywords: convenience\r
+\r
+;; This file is part of GNU Emacs.\r
+\r
+;; GNU Emacs is free software: you can redistribute it and/or modify\r
+;; it under the terms of the GNU General Public License as published by\r
+;; the Free Software Foundation, either version 3 of the License, or\r
+;; (at your option) any later version.\r
+\r
+;; GNU Emacs is distributed in the hope that it will be useful,\r
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+;; GNU General Public License for more details.\r
+\r
+;; You should have received a copy of the GNU General Public License\r
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.\r
+\r
+;;; Commentary:\r
+\r
+;; Display line numbers for the current buffer.\r
+;;\r
+;; Toggle display of line numbers with M-x linum-mode. To enable\r
+;; line numbering in all buffers, use M-x global-linum-mode.\r
+\r
+;;; Code:\r
+\r
+(defconst linum-version "0.9x")\r
+\r
+(defvar linum-overlays nil "Overlays used in this buffer.")\r
+(defvar linum-available nil "Overlays available for reuse.")\r
+(defvar linum-before-numbering-hook nil\r
+ "Functions run in each buffer before line numbering starts.")\r
+\r
+(mapc #'make-variable-buffer-local '(linum-overlays linum-available))\r
+\r
+(defgroup linum nil\r
+ "Show line numbers in the left margin."\r
+ :group 'convenience)\r
+\r
+;;;###autoload\r
+(defcustom linum-format 'dynamic\r
+ "Format used to display line numbers.\r
+Either a format string like \"%7d\", `dynamic' to adapt the width\r
+as needed, or a function that is called with a line number as its\r
+argument and should evaluate to a string to be shown on that line.\r
+See also `linum-before-numbering-hook'."\r
+ :group 'linum\r
+ :type 'sexp)\r
+\r
+(defface linum\r
+ '((t :inherit (shadow default)))\r
+ "Face for displaying line numbers in the display margin."\r
+ :group 'linum)\r
+\r
+(defcustom linum-eager t\r
+ "Whether line numbers should be updated after each command.\r
+The conservative setting `nil' might miss some buffer changes,\r
+and you have to scroll or press \\[recenter-top-bottom] to update the numbers."\r
+ :group 'linum\r
+ :type 'boolean)\r
+\r
+(defcustom linum-delay nil\r
+ "Delay updates to give Emacs a chance for other changes."\r
+ :group 'linum\r
+ :type 'boolean)\r
+\r
+;;;###autoload\r
+(define-minor-mode linum-mode\r
+ "Toggle display of line numbers in the left margin."\r
+ :lighter "" ; for desktop.el\r
+ (if linum-mode\r
+ (progn\r
+ (if linum-eager\r
+ (add-hook 'post-command-hook (if linum-delay\r
+ 'linum-schedule\r
+ 'linum-update-current) nil t)\r
+ (add-hook 'after-change-functions 'linum-after-change nil t))\r
+ (add-hook 'window-scroll-functions 'linum-after-scroll nil t)\r
+ (add-hook 'window-size-change-functions 'linum-after-size nil t)\r
+ (add-hook 'change-major-mode-hook 'linum-delete-overlays nil t)\r
+ (add-hook 'window-configuration-change-hook\r
+ 'linum-after-config nil t)\r
+ (linum-update-current))\r
+ (remove-hook 'post-command-hook 'linum-update-current t)\r
+ (remove-hook 'post-command-hook 'linum-schedule t)\r
+ (remove-hook 'window-size-change-functions 'linum-after-size t)\r
+ (remove-hook 'window-scroll-functions 'linum-after-scroll t)\r
+ (remove-hook 'after-change-functions 'linum-after-change t)\r
+ (remove-hook 'window-configuration-change-hook 'linum-after-config t)\r
+ (remove-hook 'change-major-mode-hook 'linum-delete-overlays t)\r
+ (linum-delete-overlays)))\r
+\r
+;;;###autoload\r
+(define-globalized-minor-mode global-linum-mode linum-mode linum-on)\r
+\r
+(defun linum-on ()\r
+ (unless (minibufferp)\r
+ (linum-mode 1)))\r
+\r
+(defun linum-delete-overlays ()\r
+ "Delete all overlays displaying line numbers for this buffer."\r
+ (mapc #'delete-overlay linum-overlays)\r
+ (setq linum-overlays nil)\r
+ (dolist (w (get-buffer-window-list (current-buffer) nil t))\r
+ (set-window-margins w 0)))\r
+\r
+(defun linum-update-current ()\r
+ "Update line numbers for the current buffer."\r
+ (linum-update (current-buffer)))\r
+\r
+(defun linum-update (buffer)\r
+ "Update line numbers for all windows displaying BUFFER."\r
+ (with-current-buffer buffer\r
+ (when linum-mode\r
+ (setq linum-available linum-overlays)\r
+ (setq linum-overlays nil)\r
+ (save-excursion\r
+ (mapc #'linum-update-window\r
+ (get-buffer-window-list buffer nil 'visible)))\r
+ (mapc #'delete-overlay linum-available)\r
+ (setq linum-available nil))))\r
+\r
+(defun linum-update-window (win)\r
+ "Update line numbers for the portion visible in window WIN."\r
+ (goto-char (window-start win))\r
+ (let ((line (line-number-at-pos))\r
+ (limit (window-end win t))\r
+ (fmt (cond ((stringp linum-format) linum-format)\r
+ ((eq linum-format 'dynamic)\r
+ (let ((w (length (number-to-string\r
+ (count-lines (point-min) (point-max))))))\r
+ (concat "%" (number-to-string w) "d")))))\r
+ (width 0))\r
+ (run-hooks 'linum-before-numbering-hook)\r
+ ;; Create an overlay (or reuse an existing one) for each\r
+ ;; line visible in this window, if necessary.\r
+ (while (and (not (eobp)) (<= (point) limit))\r
+ (let* ((str (if fmt\r
+ (propertize (format fmt line) 'face 'linum)\r
+ (funcall linum-format line)))\r
+ (visited (catch 'visited\r
+ (dolist (o (overlays-in (point) (point)))\r
+ (when (string= (overlay-get o 'linum-str) str)\r
+ (unless (memq o linum-overlays)\r
+ (push o linum-overlays))\r
+ (setq linum-available (delete o linum-available))\r
+ (throw 'visited t))))))\r
+ (setq width (max width (length str)))\r
+ (unless visited\r
+ (let ((ov (if (null linum-available)\r
+ (make-overlay (point) (point))\r
+ (move-overlay (pop linum-available) (point) (point)))))\r
+ (push ov linum-overlays)\r
+ (overlay-put ov 'before-string\r
+ (propertize " " 'display `((margin left-margin) ,str)))\r
+ (overlay-put ov 'linum-str str))))\r
+ (forward-line)\r
+ (setq line (1+ line)))\r
+ (set-window-margins win width)))\r
+\r
+(defun linum-after-change (beg end len)\r
+ ;; update overlays on deletions, and after newlines are inserted\r
+ (when (or (= beg end)\r
+ (= end (point-max))\r
+ (string-match-p "\n" (buffer-substring-no-properties beg end)))\r
+ (linum-update-current)))\r
+\r
+(defun linum-after-scroll (win start)\r
+ (linum-update (window-buffer win)))\r
+\r
+(defun linum-after-size (frame)\r
+ (linum-after-config))\r
+\r
+(defun linum-schedule ()\r
+ ;; schedule an update; the delay gives Emacs a chance for display changes\r
+ (run-with-idle-timer 0 nil #'linum-update-current))\r
+\r
+(defun linum-after-config ()\r
+ (walk-windows (lambda (w) (linum-update (window-buffer w))) nil 'visible))\r
+\r
+(defun linum-unload-function ()\r
+ "Unload the Linum library."\r
+ (global-linum-mode -1)\r
+ ;; continue standard unloading\r
+ nil)\r
+\r
+(provide 'linum)\r
+\r
+;; arch-tag: dea45631-ed3c-4867-8b49-1c41c80aec6a\r
+;;; linum.el ends here\r
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