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@ -1,11 +1,13 @@
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;;; page-break-lines.el --- Display ugly ^L page breaks as tidy horizontal lines |
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;;; page-break-lines.el --- Display ^L page breaks as tidy horizontal lines -*- lexical-binding: t -*- |
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;; Copyright (C) 2012-2015 Steve Purcell |
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;; Author: Steve Purcell <steve@sanityinc.com> |
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;; URL: https://github.com/purcell/page-break-lines |
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;; Package-Version: 0.11 |
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;; Package-X-Original-Version: DEV |
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;; Package-Commit: 69caea070379f3324c530e96e06625c3cd097cb9 |
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;; Package-Version: 0.14 |
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;; Package-X-Original-Version: 0 |
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;; Package-Requires: ((emacs "24.4")) |
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;; Keywords: convenience, faces |
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;; This program is free software; you can redistribute it and/or modify |
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@ -37,7 +39,7 @@
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;; If `page-break-lines-char' is displayed at a different width to |
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;; regular characters, the rule may be either too short or too long: |
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;; rules may then wrap if `truncate-lines' is nil. On some systems, |
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;; rules may then wrap if `truncate-lines' is nil. On some systems, |
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;; Emacs may erroneously choose a different font for the page break |
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;; symbol, which choice can be overridden using code such as: |
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@ -73,6 +75,12 @@
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:type '(choice (const :tag "No lighter" "") string) |
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:group 'page-break-lines) |
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(defcustom page-break-lines-max-width nil |
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"If non-nil, maximum width (in characters) of page break indicator. |
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If nil, indicator will span the width of the frame." |
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:type '(choice integer (const :tag "Full width" nil)) |
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:group 'page-break-lines) |
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(defcustom page-break-lines-modes |
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'(emacs-lisp-mode lisp-mode scheme-mode compilation-mode outline-mode help-mode) |
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"Modes in which to enable `page-break-lines-mode'." |
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@ -94,25 +102,15 @@ displayed as a junk character."
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"Toggle Page Break Lines mode. |
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In Page Break mode, page breaks (^L characters) are displayed as a |
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horizontal line of `page-break-string-char' characters." |
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horizontal line of `page-break-lines-char' characters." |
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:lighter page-break-lines-lighter |
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:group 'page-break-lines |
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(page-break-lines--update-display-tables)) |
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;;;###autoload |
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(defun turn-on-page-break-lines-mode () |
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"Enable `page-break-lines-mode' in this buffer." |
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(page-break-lines-mode 1)) |
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;;;###autoload |
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(defun turn-off-page-break-lines-mode () |
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"Disable `page-break-lines-mode' in this buffer." |
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(page-break-lines-mode -1)) |
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(dolist (hook '(window-configuration-change-hook |
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window-size-change-functions |
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after-setting-font-hook)) |
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after-setting-font-hook |
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display-line-numbers-mode-hook)) |
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(add-hook hook 'page-break-lines--update-display-tables)) |
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@ -122,23 +120,36 @@ horizontal line of `page-break-string-char' characters."
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If the buffer inside WINDOW has `page-break-lines-mode' enabled, |
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its display table will be modified as necessary." |
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(with-current-buffer (window-buffer window) |
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(if page-break-lines-mode |
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(progn |
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(unless buffer-display-table |
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(setq buffer-display-table (make-display-table))) |
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(let ((default-height (face-attribute 'default :height nil 'default))) |
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(set-face-attribute 'page-break-lines nil :height default-height) |
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(let* ((width (- (window-width window) 1)) |
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(glyph (make-glyph-code page-break-lines-char 'page-break-lines)) |
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(new-display-entry (vconcat (make-list width glyph)))) |
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(unless (equal new-display-entry (elt buffer-display-table ?\^L)) |
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(aset buffer-display-table ?\^L new-display-entry))))) |
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(when buffer-display-table |
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(aset buffer-display-table ?\^L nil))))) |
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(with-selected-window window |
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(if page-break-lines-mode |
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(progn |
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(unless buffer-display-table |
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(setq buffer-display-table (make-display-table))) |
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(let ((default-height (face-attribute 'default :height nil 'default))) |
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(set-face-attribute 'page-break-lines nil :height default-height) |
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(let* ((cwidth (char-width page-break-lines-char)) |
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(wwidth-pix (- (window-width nil t) |
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(if (and (bound-and-true-p display-line-numbers) |
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(fboundp 'line-number-display-width)) |
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(line-number-display-width t) |
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0))) |
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(width (- (/ wwidth-pix (frame-char-width) cwidth) |
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(if (display-graphic-p) 0 1))) |
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(width (if page-break-lines-max-width |
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(min width page-break-lines-max-width) |
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width)) |
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(glyph (make-glyph-code page-break-lines-char 'page-break-lines)) |
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(new-display-entry (vconcat (make-list width glyph)))) |
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(unless (equal new-display-entry (elt buffer-display-table ?\^L)) |
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(aset buffer-display-table ?\^L new-display-entry))))) |
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(when (and (apply 'derived-mode-p page-break-lines-modes) |
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buffer-display-table) |
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(aset buffer-display-table ?\^L nil)))))) |
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(defun page-break-lines--update-display-tables (&optional frame) |
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"Function called for updating display table in windows of FRAME." |
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(mapc 'page-break-lines--update-display-table (window-list frame 'no-minibuffer))) |
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(unless (minibufferp) |
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(mapc 'page-break-lines--update-display-table (window-list frame 'no-minibuffer)))) |
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@ -154,6 +165,7 @@ When `major-mode' is listed in `page-break-lines-modes', then
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;;;###autoload |
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(define-global-minor-mode global-page-break-lines-mode |
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page-break-lines-mode page-break-lines-mode-maybe |
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:require 'page-break-lines |
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:group 'page-break-lines) |
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@ -161,7 +173,6 @@ When `major-mode' is listed in `page-break-lines-modes', then
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;; Local Variables: |
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;; coding: utf-8 |
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;; byte-compile-warnings: (not cl-functions) |
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;; checkdoc-minor-mode: t |
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;; End: |
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