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;;; jao-words.el --- utilities for word stats -*- lexical-binding: t; -*-
;; Copyright (C) 2026 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <mail@jao.io>
;; Keywords: text
;; 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:
;; Simple word counting and classification
;;; Code:
(require 'org)
(require 'cl-lib)
(defvar jao-words-min-length 3)
(defvar jao-words-max-lines 12)
(defvar jao-words-min-line-distance 10)
(defun jao-words--word-lines (buffer word)
(let ((lines nil)
(last-line nil)
(case-fold-search nil)
(rx (format "\\b%s\\b" (regexp-quote word))))
(with-current-buffer buffer
(save-excursion
(goto-char (point-min))
(while (and (< (length lines) jao-words-max-lines)
(re-search-forward rx nil t))
(let* ((line (line-number-at-pos))
(d (- line (or last-line line))))
(when (< d jao-words-min-line-distance)
(when last-line
(cl-pushnew last-line lines)
(cl-pushnew line lines)))
(setq last-line line)))))
(mapconcat #'number-to-string (nreverse lines) " ")))
;;;###autoload
(defun jao-words-show-stats ()
(interactive)
(let ((counts (make-hash-table :test 'equal))
(buffer (current-buffer)))
(seq-each (lambda (word)
(when (>= (length word) jao-words-min-length)
(puthash word (1+ (gethash word counts 0)) counts)))
(split-string (downcase (buffer-string)) "\\W+" t))
(with-current-buffer (get-buffer-create "*word-statistics*")
(erase-buffer)
(insert "| word | occurences | lines |
|-----------+------------|--------------------|\n")
(maphash (lambda (word count)
(let ((lines (jao-words--word-lines buffer word)))
(insert (format "| %s | %d | %s |\n" word count lines))))
counts)
(org-mode)
(org-table-goto-line 2)
(org-table-goto-column 2)
(org-table-sort-lines nil ?N)
(org-table-align)
(org-table-goto-line 2)))
(pop-to-buffer "*word-statistics*"))
(provide 'jao-words)
;;; jao-words.el ends here
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