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[elpa] externals/show-font c5d7fd6e34 01/54: Add initial version of show
From: |
ELPA Syncer |
Subject: |
[elpa] externals/show-font c5d7fd6e34 01/54: Add initial version of show-font |
Date: |
Tue, 10 Sep 2024 03:58:56 -0400 (EDT) |
branch: externals/show-font
commit c5d7fd6e3413f3744d410c9f78c17b021b6320d5
Author: Protesilaos Stavrou <info@protesilaos.com>
Commit: Protesilaos Stavrou <info@protesilaos.com>
Add initial version of show-font
---
.gitignore | 5 +
COPYING | 674 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
README.md | 14 ++
show-font.el | 236 +++++++++++++++++++++
4 files changed, 929 insertions(+)
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000..d2c5b43f3a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*.elc
+*-autoloads.el
+*-pkg.el
+show-font.info
+show-font.texi
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000000..23df2ce662
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
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+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) 2021 Protesilaos Stavrou
+
+ This program 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.
+
+ This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) 2024 Protesilaos Stavrou
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000000..bc818d9376
--- /dev/null
+++ b/README.md
@@ -0,0 +1,14 @@
+# show-font for GNU Emacs
+
+WORK-IN-PROGRESS.
+
+This package defines a major mode to preview a font in an Emacs
+buffer. A pangram and character set are displayed at varying heights
+to help the user appreciate the given font's features.
+
+For the time being, this only works with fonts that are already
+installed on the system.
+
++ Package name (GNU ELPA): `show-font` (⚠️ not available yet)
++ Git repository: <https://github.com/protesilaos/show-font>
++ Backronyms: Show How Outlines Will Feature Only in Non-TTY.
diff --git a/show-font.el b/show-font.el
new file mode 100644
index 0000000000..aaae51f9d5
--- /dev/null
+++ b/show-font.el
@@ -0,0 +1,236 @@
+;;; show-font.el --- Show font features in a buffer -*- lexical-binding: t -*-
+
+;; Copyright (C) 2024 Free Software Foundation, Inc.
+
+;; Author: Protesilaos Stavrou <info@protesilaos.com>
+;; Maintainer: Protesilaos Stavrou <info@protesilaos.com>
+;; URL: https://github.com/protesilaos/show-font
+;; Version: 0.0.0
+;; Package-Requires: ((emacs "28.1"))
+;; Keywords: convenience, writing, font
+
+;; This file is NOT part of GNU Emacs.
+
+;; This program 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.
+;;
+;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; WORK-IN-PROGRESS. Show font features in a buffer. This depends on
+;; the font being available on the system. Otherwise, the preview is
+;; inaccurate.
+
+;;; Code:
+
+;; TODO 2024-08-24: How to find out if a font is available on the system?
+;; TODO 2024-08-24: Produce informative message if font cannot be displayed.
+;; TODO 2024-08-24: Offer option to install missing font.
+
+(eval-when-compile (require 'cl-lib))
+
+(defgroup show-font nil
+ "Show font features in a buffer WORK-IN-PROGRESS."
+ :group 'font)
+
+(defcustom show-font-pangram 'prot
+ "Pangram to display previewed font in."
+ :package-version '(show-font . "0.1.0")
+ :type '(choice
+ (const :tag "The quick brown fox jumps over the lazy dog" fox)
+ (const :tag "Grumpy wizards make toxic brew for the evil queen and
jack" wizards)
+ (const :tag "A quick movement of the enemy will jeopardize six
gunboats" gunboats)
+ (const :tag "Prot may find zesty owls join quiet vixens as the night
beckons" prot)
+ string)
+ :group 'show-font)
+
+(defcustom show-font-character-sample
+ "
+ABCDEFGHIJKLMNOPQRSTUVWXYZ
+abcdefghijklmnopqrstuvwxyz
+0123456789 !@#$¢%^&*~|
+`'\"‘’“”.,;: ()[]{}—-_+=<>
+
+()[]{}<>«»‹› 6bB8&0ODdoa 1tiIlL|\/
+!ij c¢ 5$Ss 7Z2z 9gqp nmMNNMW uvvwWuuw
+x×X .,·°;:¡!¿?`'‘’ ÄAÃÀ TODO
+"
+ "Character sample to showcase font qualities."
+ :package-version '(show-font . "0.1.0")
+ :type 'string
+ :group 'show-font)
+
+(defgroup show-font-faces nil
+ "Show font features in a buffer WORK-IN-PROGRESS."
+ :group 'show-font)
+
+(defface show-font-small '((t :height 0.8))
+ "Face for font preview at small height."
+ :group 'show-font-faces)
+
+(defface show-font-regular '((t :height 1.0))
+ "Face for font preview at regular height."
+ :group 'show-font-faces)
+
+(defface show-font-medium '((t :height 1.3))
+ "Face for font preview at medium height."
+ :group 'show-font-faces)
+
+(defface show-font-large '((t :height 1.8))
+ "Face for font preview at large height."
+ :group 'show-font-faces)
+
+(defface show-font-title '((t :inherit error :height 2.2))
+ "Face for font preview title."
+ :group 'show-font-faces)
+
+(defface show-font-subtitle '((t :inherit bold :height 1.6))
+ "Face for font preview title."
+ :group 'show-font-faces)
+
+(defconst show-font-extensions-regexp "\\.\\(ttf\\|otf\\)\\'"
+ "Regular expression to match font file extensions.")
+
+(defconst show-font-latin-alphabet
+ '("a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m"
+ "n" "o" "p" "q" "r" "s" "t" "u" "v" "w" "x" "y" "z")
+ "The latin alphabet as a list of strings.")
+
+(defun show-font-pangram-p (string &optional characters)
+ "Return non-nil if STRING is a pangram.
+With optional CHARACTERS as a list of single character strings, test
+that all of them occur at least once in STRING."
+ (let ((missing-characters nil))
+ (dolist (character (or characters show-font-latin-alphabet))
+ (unless (string-match-p character string)
+ (push character missing-characters)))
+ (if (not missing-characters)
+ t
+ (message "Still missing: %s" (mapconcat #'identity missing-characters ",
"))
+ nil)))
+
+;; NOTE 2024-08-24: Copied from `ready-player.el' by Alvaro Ramirez to
+;; quickly put this package together. I do not quite understand the
+;; mechanics of file handling yet. The idea of what I want is to get
+;; an empty buffer. Then I add contents there without making it
+;; appear modified.
+(defun show-font-handler (operation &rest args)
+ "Handle the given I/O `file-name-handler-alist' OPERATION with ARGS.
+Determine how to render the font file contents in a buffer."
+ (pcase operation
+ ('insert-file-contents
+ (cl-destructuring-bind (filename visit _beg _end _replace) args
+ (when visit
+ (setq buffer-file-name filename))
+ (list buffer-file-name (point-max))))
+ ('file-attributes
+ (let* ((file-name-handler-alist nil)
+ (attributes (apply #'file-name-non-special
+ (append (list operation) args))))
+ ;; 7 is file size location
+ ;; as per `file-attributes'.
+ (setf (nth 7 attributes) 0)
+ attributes))
+ (_ (let ((inhibit-file-name-handlers
+ (cons #'show-font-handler
+ (and (eq inhibit-file-name-operation operation)
+ inhibit-file-name-handlers)))
+ (inhibit-file-name-operation operation))
+ (apply operation args)))))
+
+(defun show-font--get-attribute (attribute &optional file)
+ "Get font family ATTRIBUTE from the current file or given FILE.
+ATTRIBUTE is a string, such as \"family\" or \"fullname\", which is
+matched against the output of the `fc-scan' executable."
+ (unless (executable-find "fc-scan")
+ (error "Cannot find `fc-scan' executable; will not render font"))
+ (let ((f (or file buffer-file-name)))
+ (when-let ((_ f)
+ (_ (string-match-p show-font-extensions-regexp f))
+ (output (shell-command-to-string (format "fc-scan %s" f)))
+ (match (string-match (format "%s: \"\\(.*\\)\"" attribute)
output))
+ (found (match-string 1 output)))
+ (if (string-match-p "\"(s)" found)
+ (car (split-string found "\"(s)" :omit-nulls))
+ found))))
+
+(defun show-font--get-pangram ()
+ "Return `show-font-pangram' or fallback string."
+ (cond
+ ((stringp show-font-pangram)
+ show-font-pangram)
+ ((eq show-font-pangram 'fox)
+ "The quick brown fox jumps over the lazy dog")
+ ((eq show-font-pangram 'wizards)
+ "Grumpy wizards make toxic brew for the evil queen and jack")
+ ((eq show-font-pangram 'gunboats)
+ "A quick movement of the enemy will jeopardize six gunboats")
+ ((eq show-font-pangram 'prot)
+ "Prot may find zesty owls join quiet vixens as the night beckons")
+ (t
+ "No string or acceptable symbol value for `show-font-pangram', but this
will do...")))
+
+(defun show-font--prepare-text ()
+ "Prepare pangram text at varying font heights."
+ (let ((pangram (show-font--get-pangram))
+ (faces '(show-font-small show-font-regular show-font-medium
show-font-large))
+ (list-of-lines nil)
+ (list-of-blocks nil)
+ (name (propertize (show-font--get-attribute "fullname") 'face
'show-font-title))
+ (family (propertize (show-font--get-attribute "family") 'face
'show-font-subtitle)))
+ (dolist (face faces)
+ (push (propertize pangram 'face (list face :family family))
list-of-lines)
+ (push (propertize show-font-character-sample 'face (list face :family
family)) list-of-blocks))
+ (concat
+ name "\n"
+ (make-string (length name) ?-) "\n"
+ "Rendered with parent family:" "\n"
+ family "\n"
+ (make-string (length family) ?=) "\n\n"
+ (mapconcat #'identity (nreverse list-of-lines) "\n") "\n"
+ (mapconcat #'identity (nreverse list-of-blocks) "\n") "\n")))
+
+(defmacro show-font-with-unmodified-buffer (&rest body)
+ "Run BODY while not making the buffer appear modified."
+ `(progn
+ ,@body
+ (set-buffer-modified-p nil)))
+
+(defun show-font--add-text (&optional buffer)
+ "Add the `show-font-pangram' as an overlay at `point-min'.
+With optional BUFFER, operate therein. Otherwise, do it in the current
+buffer."
+ (show-font-with-unmodified-buffer
+ (with-current-buffer (or buffer (current-buffer))
+ (let ((inhibit-read-only t))
+ (save-excursion
+ (insert (show-font--prepare-text)))))))
+
+;;;###autoload
+(define-derived-mode show-font-mode special-mode "Show Font"
+ "Major mode to preview a font file's character set."
+ (set-buffer-multibyte t)
+ (setq buffer-read-only t)
+ (visual-line-mode -1)
+ (setq truncate-lines t)
+ (setq buffer-undo-list t)
+ (setq-local auto-save-default nil)
+ (show-font--add-text))
+
+;;;###autoload
+(add-to-list 'file-name-handler-alist (cons show-font-extensions-regexp
#'show-font-handler))
+
+;;;###autoload
+(add-to-list 'auto-mode-alist (cons show-font-extensions-regexp
'show-font-mode))
+
+(provide 'show-font)
+;;; show-font.el ends here
- [elpa] branch externals/show-font created (now 6e10b12b5d), ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 2f55db5bad 02/54: Fix rendering of title and subtitle in the given font, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font bd9b392cf8 10/54: Simplify show-font--get-attribute, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font abb3e13345 17/54: Add TODO to refine show-font--get-pangram, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 6f878f50bc 18/54: Simplify the file name handler, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font f8e4484bcd 20/54: Clarity show-font-pangram-p doc string, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font f90e03c5e8 22/54: Refine how the title faces are produced, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font c10b077657 25/54: Add TODO about how best to support multiple languages, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font b572bacf0c 26/54: Make the major mode disable line numbers locally, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 5cf734e21a 35/54: Define a button and use it to help the user install current file, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font c5d7fd6e34 01/54: Add initial version of show-font,
ELPA Syncer <=
- [elpa] externals/show-font 460da112ed 08/54: Add TODO about other operating systems, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font a1ffe8afdf 05/54: Autoload show-font-extensions-regexp to make the package install correctly, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 1ab166f5df 14/54: Remove done to-do items, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 791416d748 16/54: Rework how we expand the pangrams for the defcustom :type, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font d3a51209eb 09/54: Use setq-local consistency in the major mode definition, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 97b3301dd3 12/54: Add error checking in show-font--prepare-text, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 9a40c37d54 04/54: Add link to demo in the README, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font b951202b9b 29/54: Define commands to (i) preview an installed font (ii) list+preview all installed fonts, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font 36d3197e13 43/54: Autoload `show-font-handler`, ELPA Syncer, 2024/09/10
- [elpa] externals/show-font a38c7ba286 53/54: Fix a couple of typos, ELPA Syncer, 2024/09/10