92 lines
3 KiB
EmacsLisp
92 lines
3 KiB
EmacsLisp
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;;; word-wrap-mode.el --- minor mode for `word-wrap' tweaks -*- lexical-binding: t; -*-
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;; Copyright (C) 2022 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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;; The list below lists all characters that have a general-category of
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;; Zs, but with the ones we don't want to add here commented out.
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(defcustom word-wrap-whitespace-characters
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'(;;?\N{SPACE}
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;;?\N{NO-BREAK SPACE}
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?\N{OGHAM SPACE MARK}
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?\N{EN QUAD}
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?\N{EM QUAD}
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?\N{EN SPACE}
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?\N{EM SPACE}
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?\N{THREE-PER-EM SPACE}
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?\N{FOUR-PER-EM SPACE}
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?\N{SIX-PER-EM SPACE}
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?\N{FIGURE SPACE}
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?\N{PUNCTUATION SPACE}
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?\N{THIN SPACE}
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?\N{HAIR SPACE}
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;;?\N{NARROW NO-BREAK SPACE}
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?\N{MEDIUM MATHEMATICAL SPACE}
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?\N{IDEOGRAPHIC SPACE}
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;; Not in the Zs category:
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?\N{ZERO WIDTH SPACE})
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"Characters that `word-wrap-whitespace-mode' should add to `word-wrap'."
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:version "29.1"
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:type '(repeat char)
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:group 'display)
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(defvar word-wrap-mode--previous-state)
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;;;###autoload
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(define-minor-mode word-wrap-whitespace-mode
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"Allow `word-wrap' to fold on all breaking whitespace characters.
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The characters to break on are defined by `word-wrap-whitespace-characters'."
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:group 'display
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(if word-wrap-whitespace-mode
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(progn
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(setq-local word-wrap-mode--previous-state
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(list (category-table)
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(local-variable-p 'word-wrap-by-category)
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word-wrap-by-category
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(local-variable-p 'word-wrap)
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word-wrap))
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(set-category-table (copy-category-table))
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(dolist (char word-wrap-whitespace-characters)
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(modify-category-entry char ?|))
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(setq-local word-wrap-by-category t
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word-wrap t))
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(pcase-let ((`(,table ,lby-cat ,by-cat
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,lwrap ,wrap)
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word-wrap-mode--previous-state))
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(if lby-cat
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(setq-local word-wrap-by-category by-cat)
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(kill-local-variable 'word-wrap-by-category))
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(if lwrap
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(setq-local word-wrap wrap)
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(kill-local-variable 'word-wrap))
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(set-category-table table))))
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;;;###autoload
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(define-globalized-minor-mode global-word-wrap-whitespace-mode
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word-wrap-whitespace-mode word-wrap-whitespace-mode
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:group 'display)
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(provide 'word-wrap-mode)
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;;; word-wrap-mode.el ends here
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