141 lines
5.4 KiB
EmacsLisp
141 lines
5.4 KiB
EmacsLisp
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;;; diredy.el --- Flexible grouping for files in Dired buffers -*- lexical-binding: t; -*-
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;; Copyright (C) 2021 Free Software Foundation, Inc.
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;; Author: Adam Porter <adam@alphapapa.net>
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;; Maintainer: Adam Porter <adam@alphapapa.net>
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;; Keywords: convenience
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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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;; This library provides a command, `diredy', that rearranges a Dired
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;; buffer into a hierarchy by file size and MIME type.
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;;; Code:
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;;;; Requirements
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(require 'taxy)
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(require 'taxy-magit-section)
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(require 'dired)
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(require 'mailcap)
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;;;; Functions
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(eval-and-compile
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(defun diredy--machine-size (size)
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"Return number of bytes represented by human-readable SIZE."
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(declare (pure t) (side-effect-free t))
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(let ((case-fold-search t))
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(string-match (rx bos (group (1+ digit)) (0+ space)
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(group (repeat 1 (any "kmg")))
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(optional (optional "i") "b"))
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size)
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(* (pcase (match-string 2 size)
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((or "k" "K") 1024)
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((or "m" "M") (* 1024 1024))
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((or "g" "G") (* 1024 1024 1024)))
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(string-to-number (match-string 1 size))))))
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;;;; Variables
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(defvar diredy-taxy
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(cl-macrolet ((label
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(prefix size)
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(propertize (concat prefix " " size)
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:machine-size (number-to-string (diredy--machine-size size)))))
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(cl-labels ((file-name
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(string) (let* ((start (text-property-not-all 0 (length string) 'dired-filename nil string))
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(end (text-property-any start (length string) 'dired-filename nil string)))
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(substring string start end)))
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(file-extension
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(filename) (file-name-extension filename))
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(file-type (string)
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(when-let ((extension (file-extension (file-name string))))
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(mailcap-extension-to-mime extension)))
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(file-size
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(filename) (file-attribute-size (file-attributes filename)))
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(file-size-group
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(string) (pcase (file-size (file-name string))
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('nil "No size")
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((pred (<= (diredy--machine-size "1G")))
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(label ">=" "1G"))
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((pred (<= (diredy--machine-size "100M")))
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(label ">=" "100M"))
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((pred (<= (diredy--machine-size "10M")))
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(label ">=" "10M"))
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((pred (<= (diredy--machine-size "1M")))
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(label ">=" "1M"))
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((pred (<= (diredy--machine-size "100K")))
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(label ">=" "100K"))
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((pred (<= (diredy--machine-size "1K")))
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(label ">=" "1K"))
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(_ (label "<" "1K"))))
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(file-dir? (string) (if (file-directory-p (file-name string))
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"Directory" "File"))
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(make-fn (&rest args)
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(apply #'make-taxy-magit-section
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:make #'make-fn
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:level-indent 1
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:item-indent 2
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:format-fn #'identity
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args)))
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(make-fn
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:name "Diredy"
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:make #'make-fn
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:take (apply-partially #'taxy-take-keyed (list #'file-dir? #'file-size-group #'file-type))))))
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(defvar dired-mode)
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;;;; Customization
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;;;; Commands
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(defun diredy ()
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"Apply grouping to current Dired buffer."
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(interactive)
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(cl-assert (eq 'dired-mode major-mode))
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(use-local-map (make-composed-keymap (list dired-mode-map magit-section-mode-map)))
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(save-excursion
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(goto-char (point-min))
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(forward-line 2)
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(let* ((lines (save-excursion
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(cl-loop until (eobp)
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collect (string-trim (buffer-substring (point-at-bol) (point-at-eol)))
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do (forward-line 1))))
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(filled-taxy (thread-last diredy-taxy
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taxy-emptied
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(taxy-fill lines)
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(taxy-mapc* (lambda (taxy)
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(setf (taxy-taxys taxy)
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(cl-sort (taxy-taxys taxy)
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(lambda (a b)
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(string< (or (get-text-property 0 :machine-size a) a)
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(or (get-text-property 0 :machine-size b) b)))
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:key #'taxy-name))))))
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(inhibit-read-only t))
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(delete-region (point) (point-max))
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(taxy-magit-section-insert filled-taxy :items 'first
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:initial-depth 0 :blank-between-depth 1))))
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;;;; Footer
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(provide 'diredy)
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;;; diredy.el ends here
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