>From d9149e30871377f90c0d5e08201b3405f3865d58 Mon Sep 17 00:00:00 2001 From: Alexander Gramiak Date: Sun, 16 Jul 2017 13:16:49 -0600 Subject: [PATCH] Add a minor mode interface for display-line-numbers * lisp/cus-start.el: Use the new display-line-numbers group. * lisp/display-line-numbers.el: New file. --- lisp/cus-start.el | 8 ++-- lisp/display-line-numbers.el | 103 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 107 insertions(+), 4 deletions(-) create mode 100644 lisp/display-line-numbers.el diff --git a/lisp/cus-start.el b/lisp/cus-start.el index ed913e3268..c28b8a147f 100644 --- a/lisp/cus-start.el +++ b/lisp/cus-start.el @@ -584,7 +584,7 @@ minibuffer-prompt-properties--setter (const :tag "Grow only" :value grow-only)) "25.1") (display-raw-bytes-as-hex display boolean "26.1") - (display-line-numbers display + (display-line-numbers display-line-numbers (choice (const :tag "Off (nil)" :value nil) (const :tag "Absolute line numbers" @@ -594,7 +594,7 @@ minibuffer-prompt-properties--setter (const :tag "Visually relative line numbers" :value visual)) "26.1") - (display-line-numbers-width display + (display-line-numbers-width display-line-numbers (choice (const :tag "Dynamically computed" :value nil) @@ -602,14 +602,14 @@ minibuffer-prompt-properties--setter :value 2 :format "%v")) "26.1") - (display-line-numbers-current-absolute display + (display-line-numbers-current-absolute display-line-numbers (choice (const :tag "Display actual number of current line" :value t) (const :tag "Display zero as number of current line" :value nil)) "26.1") - (display-line-numbers-widen display + (display-line-numbers-widen display-line-numbers (choice (const :tag "Disregard narrowing when calculating line numbers" :value t) diff --git a/lisp/display-line-numbers.el b/lisp/display-line-numbers.el new file mode 100644 index 0000000000..95237250f9 --- /dev/null +++ b/lisp/display-line-numbers.el @@ -0,0 +1,103 @@ +;;; display-line-numbers.el --- interface for display-line-numbers -*- lexical-binding: t -*- + +;; Copyright (C) 2017 Free Software Foundation, Inc. + +;; Maintainer: address@hidden +;; 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: + +;; Provides a minor mode interface for `display-line-numbers'. +;; +;; Toggle display of line numbers with M-x display-line-numbers-mode. +;; To enable line numbering in all buffers, use M-x +;; global-display-line-numbers-mode. To change the default type of +;; line numbers displayed, customize display-line-numbers-type. + +;; NOTE: Customization variables for `display-line-numbers' itself are +;; defined in cus-start.el. + +;;; Code: + +(defgroup display-line-numbers nil + "Display line numbers in the buffer." + :group 'display) + +(defcustom display-line-numbers-type t + "The default type of line numbers to use in `display-line-numbers-mode'. +See `display-line-numbers' for value options." + :group 'display-line-numbers + :type '(choice (const :tag "Relative line numbers" relative) + (const :tag "Relative visual line numbers" visual) + (other :tag "Absolute line numbers" t)) + :version "26.1") + +(defcustom display-line-numbers-grow-only nil + "If non-nil, do not shrink line number width." + :group 'display-line-numbers + :type 'boolean + :version "26.1") + +(defcustom display-line-numbers-width-start nil + "If non-nil, count number of lines to use for line number width. +When `display-line-numbers-mode' is turned on, +`display-line-numbers-width' is set to the minimum width necessary +to display all line numbers in the buffer." + :group 'display-line-numbers + :type 'boolean + :version "26.1") + +(defun display-line-numbers-update-width () + "Prevent the line number width from shrinking." + (let ((width (line-number-display-width))) + (when (> width (or display-line-numbers-width 1)) + (setq display-line-numbers-width width)))) + +;;;###autoload +(define-minor-mode display-line-numbers-mode + "Toggle display of line numbers in the buffer. +This uses `display-line-numbers' internally. + +To change the type of line numbers displayed by default, +customize `display-line-numbers-type'. To change the type while +the mode is on, set `display-line-numbers' directly." + :lighter nil + (if display-line-numbers-mode + (progn + (when display-line-numbers-width-start + (setq display-line-numbers-width + (length (number-to-string + (count-lines (point-min) (point-max)))))) + (when display-line-numbers-grow-only + (add-hook 'pre-command-hook #'display-line-numbers-update-width nil t)) + (setq display-line-numbers display-line-numbers-type)) + (remove-hook 'pre-command-hook #'display-line-numbers-update-width t) + (setq display-line-numbers nil))) + +;;;###autoload +(define-globalized-minor-mode global-display-line-numbers-mode + display-line-numbers-mode + (lambda () + (unless (or (minibufferp) + ;; taken from linum.el + (and (daemonp) (null (frame-parameter nil 'client)))) + (display-line-numbers-mode)))) + +(provide 'display-line-numbers) + +;;; display-line-numbers.el ends here -- 2.13.2