From 405a000c2736f89ad2ab705fab1b0054b7a7b5b8 Mon Sep 17 00:00:00 2001 From: Alexander Sulfrian Date: Sun, 5 Sep 2010 21:37:34 +0200 Subject: added custom linum-narrow.el for global line numbers while narrowing --- emacs.d/lisp/linum-narrow.el | 205 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 emacs.d/lisp/linum-narrow.el (limited to 'emacs.d/lisp/linum-narrow.el') diff --git a/emacs.d/lisp/linum-narrow.el b/emacs.d/lisp/linum-narrow.el new file mode 100644 index 0000000..9df1873 --- /dev/null +++ b/emacs.d/lisp/linum-narrow.el @@ -0,0 +1,205 @@ +;;; linum-narrow.el --- display line numbers in the left margin (and +;;; if narrowed relative complete buffer) + +;; Copyright (C) 2008, 2009 Free Software Foundation, Inc. + +;; Author: Alexander Sulfrian + +;; based on linum.el: +;; Author: Markus Triska +;; 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 . + +;;; 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 "0.9x") + +(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.") +(defvar linum-relativ-to-narrow nil + "Whether the line numbers are relative to the complete buffer (nil) +or the visible region (t) if the buffer is narrowed") + +(mapc #'make-variable-buffer-local '(linum-overlays linum-available linum-relativ-to-narrow)) + +(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) + (add-hook 'window-size-change-functions 'linum-after-size nil t) + (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 t) + (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)) + (save-restriction + (unless linum-relativ-to-narrow (widen)) + (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 (equal-including-properties + (overlay-get o 'linum-str) str) + (unless (memq o linum-overlays) + (push o linum-overlays)) + (setq linum-available (delq o linum-available)) + (throw 'visited t)))))) + (setq width (max width (length str))) + (unless visited + (let ((ov (if (null linum-available) + (make-overlay (point) (point)) + (move-overlay (pop linum-available) (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-narrow) + +;;; linum-narrow.el ends here -- cgit v1.2.3