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31da0380c3
(ruler-mode-header-line-format-old): Don't `make-variable-buffer-local'. (ruler-mode-ruler-function): Default to `ruler-mode-ruler'. (ruler-mode-header-line-format): Simply funcall the above. (ruler-mode): Use `make-local-variable' and `kill-local-variable' to save/restore a previous header line format. (ruler-mode-space): Don't depend on a numeric WIDTH value. (ruler-mode-ruler): Use symbolic display elements for scrollbar, fringes and margins width. (ruler-mode-ruler-function): Default to ruler-mode-ruler
747 lines
27 KiB
EmacsLisp
747 lines
27 KiB
EmacsLisp
;;; ruler-mode.el --- display a ruler in the header line
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;; Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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;; Author: David Ponce <david@dponce.com>
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;; Maintainer: David Ponce <david@dponce.com>
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;; Created: 24 Mar 2001
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;; Version: 1.6
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;; Keywords: convenience
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;; This file is part of GNU Emacs.
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or (at
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;; your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; This library provides a minor mode to display a ruler in the header
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;; line. It works only on Emacs 21.
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;;
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;; You can use the mouse to change the `fill-column' `comment-column',
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;; `goal-column', `window-margins' and `tab-stop-list' settings:
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;;
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;; [header-line (shift down-mouse-1)] set left margin end to the ruler
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;; graduation where the mouse pointer is on.
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;;
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;; [header-line (shift down-mouse-3)] set right margin beginning to
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;; the ruler graduation where the mouse pointer is on.
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;;
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;; [header-line down-mouse-2] Drag the `fill-column', `comment-column'
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;; or `goal-column' to a ruler graduation.
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;;
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;; [header-line (control down-mouse-1)] add a tab stop to the ruler
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;; graduation where the mouse pointer is on.
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;;
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;; [header-line (control down-mouse-3)] remove the tab stop at the
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;; ruler graduation where the mouse pointer is on.
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;;
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;; [header-line (control down-mouse-2)] or M-x
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;; `ruler-mode-toggle-show-tab-stops' toggle showing and visually
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;; editing `tab-stop-list' setting. The `ruler-mode-show-tab-stops'
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;; option controls if the ruler shows tab stops by default.
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;;
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;; In the ruler the character `ruler-mode-current-column-char' shows
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;; the `current-column' location, `ruler-mode-fill-column-char' shows
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;; the `fill-column' location, `ruler-mode-comment-column-char' shows
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;; the `comment-column' location, `ruler-mode-goal-column-char' shows
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;; the `goal-column' and `ruler-mode-tab-stop-char' shows tab stop
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;; locations. Graduations in `window-margins' and `window-fringes'
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;; areas are shown with a different foreground color.
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;;
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;; It is also possible to customize the following characters:
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;;
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;; - `ruler-mode-basic-graduation-char' character used for basic
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;; graduations ('.' by default).
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;; - `ruler-mode-inter-graduation-char' character used for
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;; intermediate graduations ('!' by default).
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;;
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;; The following faces are customizable:
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;;
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;; - `ruler-mode-default-face' the ruler default face.
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;; - `ruler-mode-fill-column-face' the face used to highlight the
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;; `fill-column' character.
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;; - `ruler-mode-comment-column-face' the face used to highlight the
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;; `comment-column' character.
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;; - `ruler-mode-goal-column-face' the face used to highlight the
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;; `goal-column' character.
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;; - `ruler-mode-current-column-face' the face used to highlight the
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;; `current-column' character.
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;; - `ruler-mode-tab-stop-face' the face used to highlight tab stop
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;; characters.
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;; - `ruler-mode-margins-face' the face used to highlight graduations
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;; in the `window-margins' areas.
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;; - `ruler-mode-fringes-face' the face used to highlight graduations
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;; in the `window-fringes' areas.
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;; - `ruler-mode-column-number-face' the face used to highlight the
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;; numbered graduations.
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;;
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;; `ruler-mode-default-face' inherits from the built-in `default' face.
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;; All `ruler-mode' faces inherit from `ruler-mode-default-face'.
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;;
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;; WARNING: To keep ruler graduations aligned on text columns it is
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;; important to use the same font family and size for ruler and text
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;; areas.
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;;
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;; You can override the ruler format by defining an appropriate
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;; function as the buffer-local value of `ruler-mode-ruler-function'.
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;; Installation
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;;
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;; To automatically display the ruler in specific major modes use:
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;;
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;; (add-hook '<major-mode>-hook 'ruler-mode)
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;;
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;;; History:
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;;
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;;; Code:
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(eval-when-compile
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(require 'wid-edit))
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(require 'scroll-bar)
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(require 'fringe)
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(defgroup ruler-mode nil
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"Display a ruler in the header line."
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:version "21.4"
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:group 'convenience)
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(defcustom ruler-mode-show-tab-stops nil
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"*If non-nil the ruler shows tab stop positions.
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Also allowing to visually change `tab-stop-list' setting using
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<C-down-mouse-1> and <C-down-mouse-3> on the ruler to respectively add
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or remove a tab stop. \\[ruler-mode-toggle-show-tab-stops] or
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<C-down-mouse-2> on the ruler toggles showing/editing of tab stops."
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:group 'ruler-mode
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:type 'boolean)
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;; IMPORTANT: This function must be defined before the following
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;; defcustoms because it is used in their :validate clause.
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(defun ruler-mode-character-validate (widget)
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"Ensure WIDGET value is a valid character value."
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(save-excursion
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(let ((value (widget-value widget)))
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(if (char-valid-p value)
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nil
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(widget-put widget :error
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(format "Invalid character value: %S" value))
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widget))))
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(defcustom ruler-mode-fill-column-char (if (char-displayable-p ?<3F>)
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?\<5C>
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?\|)
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"*Character used at the `fill-column' location."
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:group 'ruler-mode
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:type '(choice
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(character :tag "Character")
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(integer :tag "Integer char value"
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:validate ruler-mode-character-validate)))
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(defcustom ruler-mode-comment-column-char ?\#
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"*Character used at the `comment-column' location."
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:group 'ruler-mode
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:type '(choice
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(character :tag "Character")
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(integer :tag "Integer char value"
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:validate ruler-mode-character-validate)))
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(defcustom ruler-mode-goal-column-char ?G
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"*Character used at the `goal-column' location."
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:group 'ruler-mode
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:type '(choice
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(character :tag "Character")
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(integer :tag "Integer char value"
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:validate ruler-mode-character-validate)))
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(defcustom ruler-mode-current-column-char (if (char-displayable-p ?<3F>)
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?\<5C>
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?\@)
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"*Character used at the `current-column' location."
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:group 'ruler-mode
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:type '(choice
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(character :tag "Character")
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(integer :tag "Integer char value"
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:validate ruler-mode-character-validate)))
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(defcustom ruler-mode-tab-stop-char ?\T
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"*Character used at `tab-stop-list' locations."
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:group 'ruler-mode
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:type '(choice
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(character :tag "Character")
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(integer :tag "Integer char value"
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:validate ruler-mode-character-validate)))
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(defcustom ruler-mode-basic-graduation-char ?\.
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"*Character used for basic graduations."
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:group 'ruler-mode
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:type '(choice
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(character :tag "Character")
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(integer :tag "Integer char value"
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:validate ruler-mode-character-validate)))
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(defcustom ruler-mode-inter-graduation-char ?\!
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"*Character used for intermediate graduations."
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:group 'ruler-mode
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:type '(choice
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(character :tag "Character")
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(integer :tag "Integer char value"
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:validate ruler-mode-character-validate)))
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(defcustom ruler-mode-set-goal-column-ding-flag t
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"*Non-nil means do `ding' when `goal-column' is set."
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:group 'ruler-mode
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:type 'boolean)
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(defface ruler-mode-default-face
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'((((type tty))
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(:inherit default
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:background "grey64"
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:foreground "grey50"
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))
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(t
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(:inherit default
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:background "grey76"
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:foreground "grey64"
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:box (:color "grey76"
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:line-width 1
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:style released-button)
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)))
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"Default face used by the ruler."
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:group 'ruler-mode)
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(defface ruler-mode-pad-face
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'((((type tty))
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(:inherit ruler-mode-default-face
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:background "grey50"
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))
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(t
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(:inherit ruler-mode-default-face
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:background "grey64"
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)))
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"Face used to pad inactive ruler areas."
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:group 'ruler-mode)
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(defface ruler-mode-margins-face
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'((t
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(:inherit ruler-mode-default-face
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:foreground "white"
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)))
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"Face used to highlight margin areas."
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:group 'ruler-mode)
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(defface ruler-mode-fringes-face
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'((t
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(:inherit ruler-mode-default-face
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:foreground "green"
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)))
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"Face used to highlight fringes areas."
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:group 'ruler-mode)
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(defface ruler-mode-column-number-face
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'((t
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(:inherit ruler-mode-default-face
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:foreground "black"
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)))
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"Face used to highlight number graduations."
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:group 'ruler-mode)
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(defface ruler-mode-fill-column-face
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'((t
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(:inherit ruler-mode-default-face
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:foreground "red"
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)))
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"Face used to highlight the fill column character."
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:group 'ruler-mode)
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(defface ruler-mode-comment-column-face
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'((t
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(:inherit ruler-mode-default-face
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:foreground "red"
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)))
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"Face used to highlight the comment column character."
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:group 'ruler-mode)
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(defface ruler-mode-goal-column-face
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'((t
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(:inherit ruler-mode-default-face
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:foreground "red"
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)))
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"Face used to highlight the goal column character."
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:group 'ruler-mode)
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(defface ruler-mode-tab-stop-face
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'((t
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(:inherit ruler-mode-default-face
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:foreground "steelblue"
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)))
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"Face used to highlight tab stop characters."
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:group 'ruler-mode)
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(defface ruler-mode-current-column-face
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'((t
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(:inherit ruler-mode-default-face
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:weight bold
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:foreground "yellow"
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)))
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"Face used to highlight the `current-column' character."
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:group 'ruler-mode)
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(defsubst ruler-mode-full-window-width ()
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"Return the full width of the selected window."
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(let ((edges (window-edges)))
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(- (nth 2 edges) (nth 0 edges))))
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(defsubst ruler-mode-window-col (n)
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"Return a column number relative to the selected window.
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N is a column number relative to selected frame."
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(- n
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(car (window-edges))
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(or (car (window-margins)) 0)
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(fringe-columns 'left)
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(scroll-bar-columns 'left)))
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(defun ruler-mode-mouse-set-left-margin (start-event)
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"Set left margin end to the graduation where the mouse pointer is on.
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START-EVENT is the mouse click event."
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(interactive "e")
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(let* ((start (event-start start-event))
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(end (event-end start-event))
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col w lm rm)
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(when (eq start end) ;; mouse click
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(save-selected-window
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(select-window (posn-window start))
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(setq col (- (car (posn-col-row start)) (car (window-edges))
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(scroll-bar-columns 'left))
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w (- (ruler-mode-full-window-width)
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(scroll-bar-columns 'left)
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(scroll-bar-columns 'right)))
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(when (and (>= col 0) (< col w))
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(setq lm (window-margins)
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rm (or (cdr lm) 0)
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lm (or (car lm) 0))
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(message "Left margin set to %d (was %d)" col lm)
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(set-window-margins nil col rm))))))
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(defun ruler-mode-mouse-set-right-margin (start-event)
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"Set right margin beginning to the graduation where the mouse pointer is on.
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START-EVENT is the mouse click event."
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(interactive "e")
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(let* ((start (event-start start-event))
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(end (event-end start-event))
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col w lm rm)
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(when (eq start end) ;; mouse click
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(save-selected-window
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(select-window (posn-window start))
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(setq col (- (car (posn-col-row start)) (car (window-edges))
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(scroll-bar-columns 'left))
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w (- (ruler-mode-full-window-width)
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(scroll-bar-columns 'left)
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(scroll-bar-columns 'right)))
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(when (and (>= col 0) (< col w))
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(setq lm (window-margins)
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rm (or (cdr lm) 0)
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lm (or (car lm) 0)
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col (- w col 1))
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(message "Right margin set to %d (was %d)" col rm)
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(set-window-margins nil lm col))))))
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(defvar ruler-mode-dragged-symbol nil
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"Column symbol dragged in the ruler.
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That is `fill-column', `comment-column', `goal-column', or nil when
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nothing is dragged.")
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(defun ruler-mode-mouse-grab-any-column (start-event)
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"Drag a column symbol on the ruler.
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Start dragging on mouse down event START-EVENT, and update the column
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symbol value with the current value of the ruler graduation while
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dragging. See also the variable `ruler-mode-dragged-symbol'."
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(interactive "e")
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(setq ruler-mode-dragged-symbol nil)
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(let* ((start (event-start start-event))
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col newc oldc)
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(save-selected-window
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(select-window (posn-window start))
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(setq col (ruler-mode-window-col (car (posn-col-row start)))
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newc (+ col (window-hscroll)))
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(and
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(>= col 0) (< col (window-width))
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(cond
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;; Handle the fill column.
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((eq newc fill-column)
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(setq oldc fill-column
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ruler-mode-dragged-symbol 'fill-column)
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t) ;; Start dragging
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;; Handle the comment column.
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((eq newc comment-column)
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(setq oldc comment-column
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ruler-mode-dragged-symbol 'comment-column)
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t) ;; Start dragging
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;; Handle the goal column.
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;; A. On mouse down on the goal column character on the ruler,
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;; update the `goal-column' value while dragging.
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;; B. If `goal-column' is nil, set the goal column where the
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;; mouse is clicked.
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;; C. On mouse click on the goal column character on the
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;; ruler, unset the goal column.
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((eq newc goal-column) ; A. Drag the goal column.
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(setq oldc goal-column
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ruler-mode-dragged-symbol 'goal-column)
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t) ;; Start dragging
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((null goal-column) ; B. Set the goal column.
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(setq oldc goal-column
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goal-column newc)
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;; mouse-2 coming AFTER drag-mouse-2 invokes `ding'. This
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;; `ding' flushes the next messages about setting goal
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;; column. So here I force fetch the event(mouse-2) and
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;; throw away.
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(read-event)
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;; Ding BEFORE `message' is OK.
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(when ruler-mode-set-goal-column-ding-flag
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(ding))
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(message "Goal column set to %d (click on %s again to unset it)"
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newc
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(propertize (char-to-string ruler-mode-goal-column-char)
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'face 'ruler-mode-goal-column-face))
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nil) ;; Don't start dragging.
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)
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(if (eq 'click (ruler-mode-mouse-drag-any-column-iteration
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(posn-window start)))
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(when (eq 'goal-column ruler-mode-dragged-symbol)
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;; C. Unset the goal column.
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(set-goal-column t))
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;; At end of dragging, report the updated column symbol.
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(message "%s is set to %d (was %d)"
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ruler-mode-dragged-symbol
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(symbol-value ruler-mode-dragged-symbol)
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oldc))))))
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(defun ruler-mode-mouse-drag-any-column-iteration (window)
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"Update the ruler while dragging the mouse.
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WINDOW is the window where occurred the last down-mouse event.
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Return the symbol `drag' if the mouse has been dragged, or `click' if
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the mouse has been clicked."
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(let ((drags 0)
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event)
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(track-mouse
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(while (mouse-movement-p (setq event (read-event)))
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(setq drags (1+ drags))
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(when (eq window (posn-window (event-end event)))
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(ruler-mode-mouse-drag-any-column event)
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(force-mode-line-update))))
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(if (and (zerop drags) (eq 'click (car (event-modifiers event))))
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'click
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'drag)))
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(defun ruler-mode-mouse-drag-any-column (start-event)
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"Update the value of the symbol dragged on the ruler.
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Called on each mouse motion event START-EVENT."
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(let* ((start (event-start start-event))
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(end (event-end start-event))
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col newc)
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(save-selected-window
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(select-window (posn-window start))
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(setq col (ruler-mode-window-col (car (posn-col-row end)))
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newc (+ col (window-hscroll)))
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(when (and (>= col 0) (< col (window-width)))
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(set ruler-mode-dragged-symbol newc)))))
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(defun ruler-mode-mouse-add-tab-stop (start-event)
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"Add a tab stop to the graduation where the mouse pointer is on.
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START-EVENT is the mouse click event."
|
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(interactive "e")
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(when ruler-mode-show-tab-stops
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||
(let* ((start (event-start start-event))
|
||
(end (event-end start-event))
|
||
col ts)
|
||
(when (eq start end) ;; mouse click
|
||
(save-selected-window
|
||
(select-window (posn-window start))
|
||
(setq col (ruler-mode-window-col (car (posn-col-row start)))
|
||
ts (+ col (window-hscroll)))
|
||
(and (>= col 0) (< col (window-width))
|
||
(not (member ts tab-stop-list))
|
||
(progn
|
||
(message "Tab stop set to %d" ts)
|
||
(setq tab-stop-list (sort (cons ts tab-stop-list)
|
||
#'<)))))))))
|
||
|
||
(defun ruler-mode-mouse-del-tab-stop (start-event)
|
||
"Delete tab stop at the graduation where the mouse pointer is on.
|
||
START-EVENT is the mouse click event."
|
||
(interactive "e")
|
||
(when ruler-mode-show-tab-stops
|
||
(let* ((start (event-start start-event))
|
||
(end (event-end start-event))
|
||
col ts)
|
||
(when (eq start end) ;; mouse click
|
||
(save-selected-window
|
||
(select-window (posn-window start))
|
||
(setq col (ruler-mode-window-col (car (posn-col-row start)))
|
||
ts (+ col (window-hscroll)))
|
||
(and (>= col 0) (< col (window-width))
|
||
(member ts tab-stop-list)
|
||
(progn
|
||
(message "Tab stop at %d deleted" ts)
|
||
(setq tab-stop-list (delete ts tab-stop-list)))))))))
|
||
|
||
(defun ruler-mode-toggle-show-tab-stops ()
|
||
"Toggle showing of tab stops on the ruler."
|
||
(interactive)
|
||
(setq ruler-mode-show-tab-stops (not ruler-mode-show-tab-stops))
|
||
(force-mode-line-update))
|
||
|
||
(defvar ruler-mode-map
|
||
(let ((km (make-sparse-keymap)))
|
||
(define-key km [header-line down-mouse-1]
|
||
#'ignore)
|
||
(define-key km [header-line down-mouse-3]
|
||
#'ignore)
|
||
(define-key km [header-line down-mouse-2]
|
||
#'ruler-mode-mouse-grab-any-column)
|
||
(define-key km [header-line (shift down-mouse-1)]
|
||
#'ruler-mode-mouse-set-left-margin)
|
||
(define-key km [header-line (shift down-mouse-3)]
|
||
#'ruler-mode-mouse-set-right-margin)
|
||
(define-key km [header-line (control down-mouse-1)]
|
||
#'ruler-mode-mouse-add-tab-stop)
|
||
(define-key km [header-line (control down-mouse-3)]
|
||
#'ruler-mode-mouse-del-tab-stop)
|
||
(define-key km [header-line (control down-mouse-2)]
|
||
#'ruler-mode-toggle-show-tab-stops)
|
||
km)
|
||
"Keymap for ruler minor mode.")
|
||
|
||
(defvar ruler-mode-header-line-format-old nil
|
||
"Hold previous value of `header-line-format'.")
|
||
|
||
(defvar ruler-mode-ruler-function 'ruler-mode-ruler
|
||
"Function to call to return ruler header line format.
|
||
This variable is expected to be made buffer-local by modes.")
|
||
|
||
(defconst ruler-mode-header-line-format
|
||
'(:eval (funcall ruler-mode-ruler-function))
|
||
"`header-line-format' used in ruler mode.
|
||
Call `ruler-mode-ruler-function' to compute the ruler value.")
|
||
|
||
;;;###autoload
|
||
(define-minor-mode ruler-mode
|
||
"Display a ruler in the header line if ARG > 0."
|
||
nil nil
|
||
ruler-mode-map
|
||
:group 'ruler-mode
|
||
(if ruler-mode
|
||
(progn
|
||
;; When `ruler-mode' is on save previous header line format
|
||
;; and install the ruler header line format.
|
||
(when (local-variable-p 'header-line-format)
|
||
(set (make-local-variable 'ruler-mode-header-line-format-old)
|
||
header-line-format))
|
||
(setq header-line-format ruler-mode-header-line-format)
|
||
(add-hook 'post-command-hook 'force-mode-line-update nil t))
|
||
;; When `ruler-mode' is off restore previous header line format if
|
||
;; the current one is the ruler header line format.
|
||
(when (eq header-line-format ruler-mode-header-line-format)
|
||
(kill-local-variable 'header-line-format)
|
||
(when (local-variable-p 'ruler-mode-header-line-format-old)
|
||
(setq header-line-format ruler-mode-header-line-format-old)
|
||
(kill-local-variable 'ruler-mode-header-line-format-old)))
|
||
(remove-hook 'post-command-hook 'force-mode-line-update t)))
|
||
|
||
;; Add ruler-mode to the minor mode menu in the mode line
|
||
(define-key mode-line-mode-menu [ruler-mode]
|
||
`(menu-item "Ruler" ruler-mode
|
||
:button (:toggle . ruler-mode)))
|
||
|
||
(defconst ruler-mode-ruler-help-echo
|
||
"\
|
||
S-mouse-1/3: set L/R margin, \
|
||
mouse-2: set goal column, \
|
||
C-mouse-2: show tabs"
|
||
"Help string shown when mouse is over the ruler.
|
||
`ruler-mode-show-tab-stops' is nil.")
|
||
|
||
(defconst ruler-mode-ruler-help-echo-when-goal-column
|
||
"\
|
||
S-mouse-1/3: set L/R margin, \
|
||
C-mouse-2: show tabs"
|
||
"Help string shown when mouse is over the ruler.
|
||
`goal-column' is set and `ruler-mode-show-tab-stops' is nil.")
|
||
|
||
(defconst ruler-mode-ruler-help-echo-when-tab-stops
|
||
"\
|
||
C-mouse1/3: set/unset tab, \
|
||
C-mouse-2: hide tabs"
|
||
"Help string shown when mouse is over the ruler.
|
||
`ruler-mode-show-tab-stops' is non-nil.")
|
||
|
||
(defconst ruler-mode-fill-column-help-echo
|
||
"drag-mouse-2: set fill column"
|
||
"Help string shown when mouse is on the fill column character.")
|
||
|
||
(defconst ruler-mode-comment-column-help-echo
|
||
"drag-mouse-2: set comment column"
|
||
"Help string shown when mouse is on the comment column character.")
|
||
|
||
(defconst ruler-mode-goal-column-help-echo
|
||
"\
|
||
drag-mouse-2: set goal column, \
|
||
mouse-2: unset goal column"
|
||
"Help string shown when mouse is on the goal column character.")
|
||
|
||
(defconst ruler-mode-margin-help-echo
|
||
"%s margin %S"
|
||
"Help string shown when mouse is over a margin area.")
|
||
|
||
(defconst ruler-mode-fringe-help-echo
|
||
"%s fringe %S"
|
||
"Help string shown when mouse is over a fringe area.")
|
||
|
||
(defsubst ruler-mode-space (width &rest props)
|
||
"Return a single space string of WIDTH times the normal character width.
|
||
Optional argument PROPS specifies other text properties to apply."
|
||
(apply 'propertize " " 'display (list 'space :width width) props))
|
||
|
||
(defun ruler-mode-ruler ()
|
||
"Compute and return an header line ruler."
|
||
(let* ((w (window-width))
|
||
(m (window-margins))
|
||
(f (window-fringes))
|
||
(i 0)
|
||
(j (window-hscroll))
|
||
;; Setup the scrollbar, fringes, and margins areas.
|
||
(lf (ruler-mode-space
|
||
'left-fringe
|
||
'face 'ruler-mode-fringes-face
|
||
'help-echo (format ruler-mode-fringe-help-echo
|
||
"Left" (or (car f) 0))))
|
||
(rf (ruler-mode-space
|
||
'right-fringe
|
||
'face 'ruler-mode-fringes-face
|
||
'help-echo (format ruler-mode-fringe-help-echo
|
||
"Right" (or (cadr f) 0))))
|
||
(lm (ruler-mode-space
|
||
'left-margin
|
||
'face 'ruler-mode-margins-face
|
||
'help-echo (format ruler-mode-margin-help-echo
|
||
"Left" (or (car m) 0))))
|
||
(rm (ruler-mode-space
|
||
'right-margin
|
||
'face 'ruler-mode-margins-face
|
||
'help-echo (format ruler-mode-margin-help-echo
|
||
"Right" (or (cdr m) 0))))
|
||
(sb (ruler-mode-space
|
||
'scroll-bar
|
||
'face 'ruler-mode-pad-face))
|
||
;; Remember the scrollbar vertical type.
|
||
(sbvt (car (window-current-scroll-bars)))
|
||
;; Create an "clean" ruler.
|
||
(ruler
|
||
(propertize
|
||
(make-string w ruler-mode-basic-graduation-char)
|
||
'face 'ruler-mode-default-face
|
||
'local-map ruler-mode-map
|
||
'help-echo (cond
|
||
(ruler-mode-show-tab-stops
|
||
ruler-mode-ruler-help-echo-when-tab-stops)
|
||
(goal-column
|
||
ruler-mode-ruler-help-echo-when-goal-column)
|
||
(ruler-mode-ruler-help-echo))))
|
||
k c)
|
||
;; Setup the active area.
|
||
(while (< i w)
|
||
;; Graduations.
|
||
(cond
|
||
;; Show a number graduation.
|
||
((= (mod j 10) 0)
|
||
(setq c (number-to-string (/ j 10))
|
||
m (length c)
|
||
k i)
|
||
(put-text-property
|
||
i (1+ i) 'face 'ruler-mode-column-number-face
|
||
ruler)
|
||
(while (and (> m 0) (>= k 0))
|
||
(aset ruler k (aref c (setq m (1- m))))
|
||
(setq k (1- k))))
|
||
;; Show an intermediate graduation.
|
||
((= (mod j 5) 0)
|
||
(aset ruler i ruler-mode-inter-graduation-char)))
|
||
;; Special columns.
|
||
(cond
|
||
;; Show the `current-column' marker.
|
||
((= j (current-column))
|
||
(aset ruler i ruler-mode-current-column-char)
|
||
(put-text-property
|
||
i (1+ i) 'face 'ruler-mode-current-column-face
|
||
ruler))
|
||
;; Show the `goal-column' marker.
|
||
((and goal-column (= j goal-column))
|
||
(aset ruler i ruler-mode-goal-column-char)
|
||
(put-text-property
|
||
i (1+ i) 'face 'ruler-mode-goal-column-face
|
||
ruler)
|
||
(put-text-property
|
||
i (1+ i) 'help-echo ruler-mode-goal-column-help-echo
|
||
ruler))
|
||
;; Show the `comment-column' marker.
|
||
((= j comment-column)
|
||
(aset ruler i ruler-mode-comment-column-char)
|
||
(put-text-property
|
||
i (1+ i) 'face 'ruler-mode-comment-column-face
|
||
ruler)
|
||
(put-text-property
|
||
i (1+ i) 'help-echo ruler-mode-comment-column-help-echo
|
||
ruler))
|
||
;; Show the `fill-column' marker.
|
||
((= j fill-column)
|
||
(aset ruler i ruler-mode-fill-column-char)
|
||
(put-text-property
|
||
i (1+ i) 'face 'ruler-mode-fill-column-face
|
||
ruler)
|
||
(put-text-property
|
||
i (1+ i) 'help-echo ruler-mode-fill-column-help-echo
|
||
ruler))
|
||
;; Show the `tab-stop-list' markers.
|
||
((and ruler-mode-show-tab-stops (member j tab-stop-list))
|
||
(aset ruler i ruler-mode-tab-stop-char)
|
||
(put-text-property
|
||
i (1+ i) 'face 'ruler-mode-tab-stop-face
|
||
ruler)))
|
||
(setq i (1+ i)
|
||
j (1+ j)))
|
||
;; Return the ruler propertized string. Using list here,
|
||
;; instead of concat visually separate the different areas.
|
||
(if (nth 2 (window-fringes))
|
||
;; fringes outside margins.
|
||
(list "" (and (eq 'left sbvt) sb) lf lm
|
||
ruler rm rf (and (eq 'right sbvt) sb))
|
||
;; fringes inside margins.
|
||
(list "" (and (eq 'left sbvt) sb) lm lf
|
||
ruler rf rm (and (eq 'right sbvt) sb)))))
|
||
|
||
(provide 'ruler-mode)
|
||
|
||
;; Local Variables:
|
||
;; coding: iso-latin-1
|
||
;; End:
|
||
|
||
;;; arch-tag: b2f24546-5605-44c4-b67b-c9a4eeba3ee8
|
||
;;; ruler-mode.el ends here
|