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55 lines
2 KiB
EmacsLisp
55 lines
2 KiB
EmacsLisp
;;; erc-doom-modeline-hack.el --- -*- lexical-binding: t -*-
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;; Copyright (C) 2025 Benson Chu
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;; Author: Benson Chu <bensonchu457@gmail.com>
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;; Created: [2025-09-01 10:50]
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;; This file is not part of GNU Emacs
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;; This program 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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;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(defun my/string-pixel-width (string)
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"Return the width of STRING in pixels.
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If you call this function to measure pixel width of a string
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with embedded newlines, it returns the width of the widest
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substring that does not include newlines."
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(declare (important-return-value t))
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(if (zerop (length string))
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0
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;; Keeping a work buffer around is more efficient than creating a
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;; new temporary buffer.
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(let ((inhibit-read-only t))
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(with-current-buffer (get-buffer-create " *string-pixel-width*")
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;; If `display-line-numbers' is enabled in internal buffers
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;; (e.g. globally), it breaks width calculation (bug#59311)
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(setq-local display-line-numbers nil)
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(delete-region (point-min) (point-max))
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;; Disable line-prefix and wrap-prefix, for the same reason.
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(setq line-prefix nil
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wrap-prefix nil)
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(insert (propertize string 'line-prefix nil 'wrap-prefix nil))
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(car (buffer-text-pixel-size nil nil t))))))
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(advice-add #'string-pixel-width
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:override
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#'my/string-pixel-width)
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(provide 'erc-doom-modeline-hack)
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;;; erc-doom-modeline-hack.el ends here
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